newlib-cygwin/winsup/cygwin/flock.cc

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/* flock.cc. NT specific implementation of advisory file locking.
Copyright 2003, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015 Red Hat, Inc.
This file is part of Cygwin.
This software is a copyrighted work licensed under the terms of the
Cygwin license. Please consult the file "CYGWIN_LICENSE" for
details. */
/* The basic mechanism as well as the datastructures used in the below
implementation are taken from the FreeBSD repository on 2008-03-18.
The essential code of the lf_XXX functions has been taken from the
module src/sys/kern/kern_lockf.c. It has been adapted to use NT
global namespace subdirs and event objects for synchronization
purposes.
So, the following copyright applies to most of the code in the lf_XXX
functions.
* Copyright (c) 1982, 1986, 1989, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Scooter Morris at Genentech Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)ufs_lockf.c 8.3 (Berkeley) 1/6/94
*/
/*
* The flock() function is based upon source taken from the Red Hat
* implementation used in their imap-2002d SRPM.
*
* $RH: flock.c,v 1.2 2000/08/23 17:07:00 nalin Exp $
*/
/* The lockf function is based upon FreeBSD sources with the following
* copyright.
*/
/*
* Copyright (c) 1997 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Klaus Klein.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include "winsup.h"
#include <assert.h>
#include <sys/file.h>
#include <unistd.h>
#include <stdlib.h>
#include "cygerrno.h"
#include "security.h"
* fhandler.h (-struct wsa_event): Move to wsa_event.h. Include wsa_event.h instead. * fhandler_socket.cc (NUM_SOCKS): Move to wsa_event.h. (wsa_events): Move from DLL shared area to cygwin_shared shared memory. Accommodate throughout. (socket_serial_number): Ditto. * fhandler_tape.cc (mt): Ditto. (mtinfo_init): Remove. (mt): Define as cygwin_shared->mt. * flock.cc (FLOCK_PARENT_DIR_ACCESS): Remove. (FLOCK_INODE_DIR_ACCESS): Move up in file. (FLOCK_MUTANT_ACCESS): Ditto. (FLOCK_EVENT_ACCESS): Ditto. (get_lock_parent_dir): Remove. (inode_t::inode_t): Call get_shared_parent_dir to get parent dir handle. Add a "flock-" prefix to file's lock directory name for clarity. * mtinfo.h (mtinfo_init): Drop declaration. * net.cc (last_used_bindresvport): Move from DLL shared area to cygwin_shared shared memory. (cygwin_bindresvport_sa): Accommodate above change. * sec_helper.cc (_everyone_sd): Move here from flock.cc. * security.h (SD_MIN_SIZE): Ditto. (everyone_sd): Ditto. * shared.cc (cygwin_shared_area): Remove. (cygwin_shared_h): New handle. (get_shared_parent_dir): New static function. (shared_name): Drop session_local argument. Call get_shared_parent_dir here. Add cygwin-shared subdir to object name. (offsets): Reinstantiate SH_CYGWIN_SHARED member. (open_shared): Revert change from 2007-03-29 for systems supporting SeCreateGlobalPrivilege. (shared_info::initialize): Call mtinfo's initialize here. (memory_init): Drop call to mtinfo_init. * shared_info.h (SHARED_INFO_CB): Accommodate change to shared_info. (CURR_SHARED_MAGIC): Ditto. (class shared_info): Add members for global socket and tape info sharing. (enum shared_locations): Reinstantiate SH_CYGWIN_SHARED. (get_shared_parent_dir): Declare. (shared_name): Drop session_local argument from declaration. * wsa_event.h: New file. Move definitions of NUM_SOCKS and struct wsa_event here.
2008-04-19 04:13:37 +08:00
#include "shared_info.h"
#include "path.h"
#include "fhandler.h"
#include "dtable.h"
#include "cygheap.h"
#include "pinfo.h"
#include "sigproc.h"
#include "cygtls.h"
#include "tls_pbuf.h"
#include "miscfuncs.h"
#include "ntdll.h"
#include <sys/queue.h>
#include <wchar.h>
#define F_WAIT 0x10 /* Wait until lock is granted */
#define F_FLOCK 0x20 /* Use flock(2) semantics for lock */
#define F_POSIX 0x40 /* Use POSIX semantics for lock */
#ifndef OFF_MAX
#define OFF_MAX LLONG_MAX
#endif
static NO_COPY muto lockf_guard;
#define INODE_LIST_LOCK() (lockf_guard.init ("lockf_guard")->acquire ())
#define INODE_LIST_UNLOCK() (lockf_guard.release ())
#define LOCK_DIR_NAME_FMT L"flock-%08x-%016X"
#define LOCK_DIR_NAME_LEN 31 /* Length of the resulting name */
#define LOCK_DIR_NAME_DEV_OFF 6 /* Offset to device number */
#define LOCK_DIR_NAME_INO_OFF 15 /* Offset to inode number */
/* Don't change format without also changing lockf_t::from_obj_name! */
#define LOCK_OBJ_NAME_FMT L"%02x-%01x-%016X-%016X-%016X-%08x-%04x"
#define LOCK_OBJ_NAME_LEN 69 /* Length of the resulting name */
* fhandler.h (-struct wsa_event): Move to wsa_event.h. Include wsa_event.h instead. * fhandler_socket.cc (NUM_SOCKS): Move to wsa_event.h. (wsa_events): Move from DLL shared area to cygwin_shared shared memory. Accommodate throughout. (socket_serial_number): Ditto. * fhandler_tape.cc (mt): Ditto. (mtinfo_init): Remove. (mt): Define as cygwin_shared->mt. * flock.cc (FLOCK_PARENT_DIR_ACCESS): Remove. (FLOCK_INODE_DIR_ACCESS): Move up in file. (FLOCK_MUTANT_ACCESS): Ditto. (FLOCK_EVENT_ACCESS): Ditto. (get_lock_parent_dir): Remove. (inode_t::inode_t): Call get_shared_parent_dir to get parent dir handle. Add a "flock-" prefix to file's lock directory name for clarity. * mtinfo.h (mtinfo_init): Drop declaration. * net.cc (last_used_bindresvport): Move from DLL shared area to cygwin_shared shared memory. (cygwin_bindresvport_sa): Accommodate above change. * sec_helper.cc (_everyone_sd): Move here from flock.cc. * security.h (SD_MIN_SIZE): Ditto. (everyone_sd): Ditto. * shared.cc (cygwin_shared_area): Remove. (cygwin_shared_h): New handle. (get_shared_parent_dir): New static function. (shared_name): Drop session_local argument. Call get_shared_parent_dir here. Add cygwin-shared subdir to object name. (offsets): Reinstantiate SH_CYGWIN_SHARED member. (open_shared): Revert change from 2007-03-29 for systems supporting SeCreateGlobalPrivilege. (shared_info::initialize): Call mtinfo's initialize here. (memory_init): Drop call to mtinfo_init. * shared_info.h (SHARED_INFO_CB): Accommodate change to shared_info. (CURR_SHARED_MAGIC): Ditto. (class shared_info): Add members for global socket and tape info sharing. (enum shared_locations): Reinstantiate SH_CYGWIN_SHARED. (get_shared_parent_dir): Declare. (shared_name): Drop session_local argument from declaration. * wsa_event.h: New file. Move definitions of NUM_SOCKS and struct wsa_event here.
2008-04-19 04:13:37 +08:00
#define FLOCK_INODE_DIR_ACCESS (DIRECTORY_QUERY \
| DIRECTORY_TRAVERSE \
| DIRECTORY_CREATE_OBJECT \
| READ_CONTROL)
#define FLOCK_EVENT_ACCESS (EVENT_QUERY_STATE \
| SYNCHRONIZE \
| READ_CONTROL)
/* This function takes the own process security descriptor DACL and adds
SYNCHRONIZE permissions for everyone. This allows all processes
to wait for this process to die when blocking in a F_SETLKW on a lock
which is hold by this process. */
static void
allow_others_to_sync ()
{
static NO_COPY bool done;
if (done)
return;
NTSTATUS status;
PACL dacl;
LPVOID ace;
ULONG len;
/* Get this process DACL. We use a rather small stack buffer here which
should be more than sufficient for process ACLs. Can't use tls functions
at this point because this gets called during initialization when the tls
is not really available. */
#define MAX_PROCESS_SD_SIZE 3072
PISECURITY_DESCRIPTOR sd = (PISECURITY_DESCRIPTOR) alloca (MAX_PROCESS_SD_SIZE);
status = NtQuerySecurityObject (NtCurrentProcess (),
DACL_SECURITY_INFORMATION, sd,
MAX_PROCESS_SD_SIZE, &len);
if (!NT_SUCCESS (status))
{
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debug_printf ("NtQuerySecurityObject: %y", status);
return;
}
/* Create a valid dacl pointer and set its size to be as big as
there's room in the temporary buffer. Note that the descriptor
is in self-relative format. */
BOOLEAN present, defaulted;
RtlGetDaclSecurityDescriptor (sd, &present, &dacl, &defaulted);
if (!present) /* If so, dacl has undefined value. */
{
dacl = (PACL) (sd + 1);
RtlCreateAcl (dacl, MAX_PROCESS_SD_SIZE - sizeof *sd, ACL_REVISION);
}
else if (dacl == NULL) /* Everyone has all access anyway */
{
done = true;
return;
}
else
{
dacl->AclSize = MAX_PROCESS_SD_SIZE - ((PBYTE) dacl - (PBYTE) sd);
}
/* Allow everyone to SYNCHRONIZE with this process. */
status = RtlAddAccessAllowedAce (dacl, ACL_REVISION, SYNCHRONIZE,
well_known_world_sid);
if (!NT_SUCCESS (status))
{
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debug_printf ("RtlAddAccessAllowedAce: %y", status);
return;
}
/* Set the size of the DACL correctly. */
status = RtlFirstFreeAce (dacl, &ace);
if (!NT_SUCCESS (status))
{
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debug_printf ("RtlFirstFreeAce: %y", status);
return;
}
dacl->AclSize = (char *) ace - (char *) dacl;
/* Write the DACL back. */
status = NtSetSecurityObject (NtCurrentProcess (), DACL_SECURITY_INFORMATION, sd);
if (!NT_SUCCESS (status))
{
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debug_printf ("NtSetSecurityObject: %y", status);
return;
}
done = true;
}
* smallprint.cc (__small_vswprintf): Fix uninitialized usage of `w'. Revamp advisory file locking to avoid cross reference pointers as well as to allow BSD flock semantics. More agressively delete unused nodes and sync objects. * fhandler.h (fhandler_base::ino): Rename from namehash. Fix comment. (fhandler_base::node): Remove. (fhandler_base::unique_id): Add. (fhandler_base::del_my_locks): New method. (get_ino): Rename from get_namehash. Change usage throughout Cygwin. (get_unique_id): New method. * fhandler.cc (fhandler_base::close): Call own del_my_locks method. Fix comment. (fhandler_base::fhandler_base): Accommodate new and changed members. (fhandler_base::fixup_after_fork): Call del_my_locks. (fhandler_base::fixup_after_exec): Ditto for files with close-on-exec flag set. * fhandler_disk_file.cc (get_ino_by_handle): Rename from readdir_get_ino_by_handle. Accommodate throughout. (fhandler_base::open_fs): Fill ino with inode number if FS has good inodes. Allocate a LUID and store in unique_id to recognize file descriptors referencing the same file object. * flock.cc: Drop flock TODO comments. Use explicit types __dev32_t and __ino64_t instead of dev_t and ino_t. (LOCK_OBJ_NAME_LEN): Change to reflect longer lf_id length. (get_obj_handle_count): New method. (lockf_t::lf_id): Change type to long long. (inode_t::get_lock_obj_handle_count): Drop in favor of static function get_obj_handle_count. (inode_t::del_locks): Remove. (inode_t::get): Add create_if_missing flag argument. (inode_t::del_my_locks): Reimplement to handle POSIX and BSD flock locks. Return if node can be deleted or not. (inode_t::~inode_t): Ditto. Close handles to i_dir and i_mtx. (fixup_lockf_after_fork): Remove. (fhandler_base::del_my_locks): New method. (fixup_lockf_after_exec): Check if node can be deleted. (inode_t::get): Only create node if create_if_missing is set. Lock the returned node here before unlocking the node list. (inode_t::get_all_locks_list): Accommodate new lf_id length. (inode_t::create_lock_obj): Ditto. (lockf_t::open_lock_obj): Ditto. Change return type to bool. De-const. Set lf_obj instead of returning a handle. (lockf_t::del_lock_obj): Call SetEvent only if new incoming parameters allow it. Explain how it's supposed to work. (fhandler_disk_file::lock): Only fetch file length in SEEK_END case. Use NtQueryInformationFile(FileStandardInformation) instead of calling fstat_by_handle. Always unlock node before returning. Use fhandler's unique id to create lf_id for BSD flock locks. Rely on node lock from inode_t::get. Call del_lock_obj on removed locks here to allow explicit unlocking. Delete node if no lock exists on the file anymore. (lf_setlock): Get file handle as additional parameter. Handle the fact that lf_getblock now always opens the attached event object. Reactivate erroneously applied patch which deactivates setting thread priority. Additionally handle blocking on BSD flock locks. (lf_clearlock): Get file handle as additional parameter. (lf_getlock): Close event handle opened by lf_getblock. (lf_getblock): Open potentially blocking event object here and check its signal state if it's a BSD flock lock. (lf_wakelock): Get file handle as additional parameter. * fork.cc (frok::child): Drop call to fixup_lockf_after_fork. * ntdll.h (struct _EVENT_BASIC_INFORMATION): Define. (enum _EVENT_INFORMATION_CLASS): Define. (NtQueryEvent): Declare. * fhandler.h (fhandler_base::fs_flags): Remove. (fhandler_base::set_fs_flags): Remove. (fhandler_base::get_fs_flags): Remove. * fhandler.cc (fhandler_base::write): Check for sparse file using pc.fs_flags(). * fhandler_disk_file.cc (fhandler_disk_file::ftruncate): Ditto. The return of the volume serial number in fs_info. * fhandler.h (get_dev): New method. * fhandler_disk_file.cc (fhandler_base::fstat_by_handle): Drop call to NtQueryVolumeInformationFile(FileFsVolumeInformation). Just use get_dev() method. * fhandler_fifo.cc (fhandler_fifo::open) Use device ID and inode number to generate fifo name. * path.h (fs_info::sernum): New member. (fs_info::serial_number): New method. (path_conv::fs_serial_number): New method. * path.cc (fs_info::update): Fetch volume serial number and store in sernum.
2008-04-01 02:03:25 +08:00
/* Get the handle count of an object. */
static ULONG
get_obj_handle_count (HANDLE h)
{
OBJECT_BASIC_INFORMATION obi;
NTSTATUS status;
ULONG hdl_cnt = 0;
status = NtQueryObject (h, ObjectBasicInformation, &obi, sizeof obi, NULL);
if (!NT_SUCCESS (status))
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debug_printf ("NtQueryObject: %y", status);
* smallprint.cc (__small_vswprintf): Fix uninitialized usage of `w'. Revamp advisory file locking to avoid cross reference pointers as well as to allow BSD flock semantics. More agressively delete unused nodes and sync objects. * fhandler.h (fhandler_base::ino): Rename from namehash. Fix comment. (fhandler_base::node): Remove. (fhandler_base::unique_id): Add. (fhandler_base::del_my_locks): New method. (get_ino): Rename from get_namehash. Change usage throughout Cygwin. (get_unique_id): New method. * fhandler.cc (fhandler_base::close): Call own del_my_locks method. Fix comment. (fhandler_base::fhandler_base): Accommodate new and changed members. (fhandler_base::fixup_after_fork): Call del_my_locks. (fhandler_base::fixup_after_exec): Ditto for files with close-on-exec flag set. * fhandler_disk_file.cc (get_ino_by_handle): Rename from readdir_get_ino_by_handle. Accommodate throughout. (fhandler_base::open_fs): Fill ino with inode number if FS has good inodes. Allocate a LUID and store in unique_id to recognize file descriptors referencing the same file object. * flock.cc: Drop flock TODO comments. Use explicit types __dev32_t and __ino64_t instead of dev_t and ino_t. (LOCK_OBJ_NAME_LEN): Change to reflect longer lf_id length. (get_obj_handle_count): New method. (lockf_t::lf_id): Change type to long long. (inode_t::get_lock_obj_handle_count): Drop in favor of static function get_obj_handle_count. (inode_t::del_locks): Remove. (inode_t::get): Add create_if_missing flag argument. (inode_t::del_my_locks): Reimplement to handle POSIX and BSD flock locks. Return if node can be deleted or not. (inode_t::~inode_t): Ditto. Close handles to i_dir and i_mtx. (fixup_lockf_after_fork): Remove. (fhandler_base::del_my_locks): New method. (fixup_lockf_after_exec): Check if node can be deleted. (inode_t::get): Only create node if create_if_missing is set. Lock the returned node here before unlocking the node list. (inode_t::get_all_locks_list): Accommodate new lf_id length. (inode_t::create_lock_obj): Ditto. (lockf_t::open_lock_obj): Ditto. Change return type to bool. De-const. Set lf_obj instead of returning a handle. (lockf_t::del_lock_obj): Call SetEvent only if new incoming parameters allow it. Explain how it's supposed to work. (fhandler_disk_file::lock): Only fetch file length in SEEK_END case. Use NtQueryInformationFile(FileStandardInformation) instead of calling fstat_by_handle. Always unlock node before returning. Use fhandler's unique id to create lf_id for BSD flock locks. Rely on node lock from inode_t::get. Call del_lock_obj on removed locks here to allow explicit unlocking. Delete node if no lock exists on the file anymore. (lf_setlock): Get file handle as additional parameter. Handle the fact that lf_getblock now always opens the attached event object. Reactivate erroneously applied patch which deactivates setting thread priority. Additionally handle blocking on BSD flock locks. (lf_clearlock): Get file handle as additional parameter. (lf_getlock): Close event handle opened by lf_getblock. (lf_getblock): Open potentially blocking event object here and check its signal state if it's a BSD flock lock. (lf_wakelock): Get file handle as additional parameter. * fork.cc (frok::child): Drop call to fixup_lockf_after_fork. * ntdll.h (struct _EVENT_BASIC_INFORMATION): Define. (enum _EVENT_INFORMATION_CLASS): Define. (NtQueryEvent): Declare. * fhandler.h (fhandler_base::fs_flags): Remove. (fhandler_base::set_fs_flags): Remove. (fhandler_base::get_fs_flags): Remove. * fhandler.cc (fhandler_base::write): Check for sparse file using pc.fs_flags(). * fhandler_disk_file.cc (fhandler_disk_file::ftruncate): Ditto. The return of the volume serial number in fs_info. * fhandler.h (get_dev): New method. * fhandler_disk_file.cc (fhandler_base::fstat_by_handle): Drop call to NtQueryVolumeInformationFile(FileFsVolumeInformation). Just use get_dev() method. * fhandler_fifo.cc (fhandler_fifo::open) Use device ID and inode number to generate fifo name. * path.h (fs_info::sernum): New member. (fs_info::serial_number): New method. (path_conv::fs_serial_number): New method. * path.cc (fs_info::update): Fetch volume serial number and store in sernum.
2008-04-01 02:03:25 +08:00
else
hdl_cnt = obi.HandleCount;
return hdl_cnt;
}
/* Helper struct to construct a local OBJECT_ATTRIBUTES on the stack. */
struct lockfattr_t
{
OBJECT_ATTRIBUTES attr;
UNICODE_STRING uname;
WCHAR name[LOCK_OBJ_NAME_LEN + 1];
};
/* Per lock class. */
class lockf_t
{
public:
uint16_t lf_flags; /* Semantics: F_POSIX, F_FLOCK, F_WAIT */
uint16_t lf_type; /* Lock type: F_RDLCK, F_WRLCK */
2013-04-23 17:44:36 +08:00
off_t lf_start; /* Byte # of the start of the lock */
off_t lf_end; /* Byte # of the end of the lock (-1=EOF) */
int64_t lf_id; /* Cygwin PID for POSIX locks, a unique id per
* smallprint.cc (__small_vswprintf): Fix uninitialized usage of `w'. Revamp advisory file locking to avoid cross reference pointers as well as to allow BSD flock semantics. More agressively delete unused nodes and sync objects. * fhandler.h (fhandler_base::ino): Rename from namehash. Fix comment. (fhandler_base::node): Remove. (fhandler_base::unique_id): Add. (fhandler_base::del_my_locks): New method. (get_ino): Rename from get_namehash. Change usage throughout Cygwin. (get_unique_id): New method. * fhandler.cc (fhandler_base::close): Call own del_my_locks method. Fix comment. (fhandler_base::fhandler_base): Accommodate new and changed members. (fhandler_base::fixup_after_fork): Call del_my_locks. (fhandler_base::fixup_after_exec): Ditto for files with close-on-exec flag set. * fhandler_disk_file.cc (get_ino_by_handle): Rename from readdir_get_ino_by_handle. Accommodate throughout. (fhandler_base::open_fs): Fill ino with inode number if FS has good inodes. Allocate a LUID and store in unique_id to recognize file descriptors referencing the same file object. * flock.cc: Drop flock TODO comments. Use explicit types __dev32_t and __ino64_t instead of dev_t and ino_t. (LOCK_OBJ_NAME_LEN): Change to reflect longer lf_id length. (get_obj_handle_count): New method. (lockf_t::lf_id): Change type to long long. (inode_t::get_lock_obj_handle_count): Drop in favor of static function get_obj_handle_count. (inode_t::del_locks): Remove. (inode_t::get): Add create_if_missing flag argument. (inode_t::del_my_locks): Reimplement to handle POSIX and BSD flock locks. Return if node can be deleted or not. (inode_t::~inode_t): Ditto. Close handles to i_dir and i_mtx. (fixup_lockf_after_fork): Remove. (fhandler_base::del_my_locks): New method. (fixup_lockf_after_exec): Check if node can be deleted. (inode_t::get): Only create node if create_if_missing is set. Lock the returned node here before unlocking the node list. (inode_t::get_all_locks_list): Accommodate new lf_id length. (inode_t::create_lock_obj): Ditto. (lockf_t::open_lock_obj): Ditto. Change return type to bool. De-const. Set lf_obj instead of returning a handle. (lockf_t::del_lock_obj): Call SetEvent only if new incoming parameters allow it. Explain how it's supposed to work. (fhandler_disk_file::lock): Only fetch file length in SEEK_END case. Use NtQueryInformationFile(FileStandardInformation) instead of calling fstat_by_handle. Always unlock node before returning. Use fhandler's unique id to create lf_id for BSD flock locks. Rely on node lock from inode_t::get. Call del_lock_obj on removed locks here to allow explicit unlocking. Delete node if no lock exists on the file anymore. (lf_setlock): Get file handle as additional parameter. Handle the fact that lf_getblock now always opens the attached event object. Reactivate erroneously applied patch which deactivates setting thread priority. Additionally handle blocking on BSD flock locks. (lf_clearlock): Get file handle as additional parameter. (lf_getlock): Close event handle opened by lf_getblock. (lf_getblock): Open potentially blocking event object here and check its signal state if it's a BSD flock lock. (lf_wakelock): Get file handle as additional parameter. * fork.cc (frok::child): Drop call to fixup_lockf_after_fork. * ntdll.h (struct _EVENT_BASIC_INFORMATION): Define. (enum _EVENT_INFORMATION_CLASS): Define. (NtQueryEvent): Declare. * fhandler.h (fhandler_base::fs_flags): Remove. (fhandler_base::set_fs_flags): Remove. (fhandler_base::get_fs_flags): Remove. * fhandler.cc (fhandler_base::write): Check for sparse file using pc.fs_flags(). * fhandler_disk_file.cc (fhandler_disk_file::ftruncate): Ditto. The return of the volume serial number in fs_info. * fhandler.h (get_dev): New method. * fhandler_disk_file.cc (fhandler_base::fstat_by_handle): Drop call to NtQueryVolumeInformationFile(FileFsVolumeInformation). Just use get_dev() method. * fhandler_fifo.cc (fhandler_fifo::open) Use device ID and inode number to generate fifo name. * path.h (fs_info::sernum): New member. (fs_info::serial_number): New method. (path_conv::fs_serial_number): New method. * path.cc (fs_info::update): Fetch volume serial number and store in sernum.
2008-04-01 02:03:25 +08:00
file table entry for BSD flock locks. */
DWORD lf_wid; /* Win PID of the resource holding the lock */
* flock.cc (LOCK_OBJ_NAME_LEN): Change to accommodate extra lf_ver field. (class lockf_t): Add lf_ver field. (lockf_t::lockf_t): Initialize lf_ver to 0. (class inode_t): Change i_wait to i_cnt. Change comment to explain change in usage. (inode_t:use): Rename from wait. Make private. (inode_t::unuse): Rename from unwait. Make private. (inode_t::inuse): Rename from waiting. Make private. (inode_t::notused): New public method to set use count to 0. (inode_t::unlock_and_remove): New method to unlock node and to delete it if it's unused in current process. (fhandler_base::del_my_locks): Drop global list lock. Drop variable no_locks_left. Simpify unlocking and removing node by just calling unlock_and_remove. (fixup_lockf_after_exec): Call notused method for each node. (inode_t::get): Call use method. Lock node only if outside of list lock. (inode_t::get_all_locks_list): Accommodate additional lf_ver field when creating lockf_t structure from object name. (lockf_t::create_lock_obj_attr): Accommodate additional lf_ver field when creating object name from lockf_t structure. Handle STATUS_OBJECT_NAME_COLLISION gracefully in F_POSIX case as well. Change comment accordingly. Increment lf_ver field rather than high byte of lf_wid field. Simplify comment. (fhandler_disk_file::lock): Always call unlock_and_remove rather than just UNLOCK on node. (lf_setlock): Move ret definition where it's used. Drop unneeded tests for obj being not NULL. Only check for deadlock condition if the lock we're trying to establish is a POSIX lock. Revamp object collecting and wait code to cover all cases. Don't return with EDEADLK if blocking process can't be opened for synchronization in F_POSIX case, rather just wait like in F_FLOCK case. Change system_printf to debug_printf in that case. Only run WaitForMultipleObjects with high priority. Close obj and process handles prior to locking node.
2011-08-29 21:50:25 +08:00
uint16_t lf_ver; /* Version number of the lock. If a released
lock event yet exists because another process
is still waiting for it, we use the version
field to distinguish old from new locks. */
class lockf_t **lf_head; /* Back pointer to the head of the lockf_t list */
class inode_t *lf_inode; /* Back pointer to the inode_t */
class lockf_t *lf_next; /* Pointer to the next lock on this inode_t */
HANDLE lf_obj; /* Handle to the lock event object. */
lockf_t ()
: lf_flags (0), lf_type (0), lf_start (0), lf_end (0), lf_id (0),
* flock.cc (LOCK_OBJ_NAME_LEN): Change to accommodate extra lf_ver field. (class lockf_t): Add lf_ver field. (lockf_t::lockf_t): Initialize lf_ver to 0. (class inode_t): Change i_wait to i_cnt. Change comment to explain change in usage. (inode_t:use): Rename from wait. Make private. (inode_t::unuse): Rename from unwait. Make private. (inode_t::inuse): Rename from waiting. Make private. (inode_t::notused): New public method to set use count to 0. (inode_t::unlock_and_remove): New method to unlock node and to delete it if it's unused in current process. (fhandler_base::del_my_locks): Drop global list lock. Drop variable no_locks_left. Simpify unlocking and removing node by just calling unlock_and_remove. (fixup_lockf_after_exec): Call notused method for each node. (inode_t::get): Call use method. Lock node only if outside of list lock. (inode_t::get_all_locks_list): Accommodate additional lf_ver field when creating lockf_t structure from object name. (lockf_t::create_lock_obj_attr): Accommodate additional lf_ver field when creating object name from lockf_t structure. Handle STATUS_OBJECT_NAME_COLLISION gracefully in F_POSIX case as well. Change comment accordingly. Increment lf_ver field rather than high byte of lf_wid field. Simplify comment. (fhandler_disk_file::lock): Always call unlock_and_remove rather than just UNLOCK on node. (lf_setlock): Move ret definition where it's used. Drop unneeded tests for obj being not NULL. Only check for deadlock condition if the lock we're trying to establish is a POSIX lock. Revamp object collecting and wait code to cover all cases. Don't return with EDEADLK if blocking process can't be opened for synchronization in F_POSIX case, rather just wait like in F_FLOCK case. Change system_printf to debug_printf in that case. Only run WaitForMultipleObjects with high priority. Close obj and process handles prior to locking node.
2011-08-29 21:50:25 +08:00
lf_wid (0), lf_ver (0), lf_head (NULL), lf_inode (NULL),
* smallprint.cc (__small_vswprintf): Fix uninitialized usage of `w'. Revamp advisory file locking to avoid cross reference pointers as well as to allow BSD flock semantics. More agressively delete unused nodes and sync objects. * fhandler.h (fhandler_base::ino): Rename from namehash. Fix comment. (fhandler_base::node): Remove. (fhandler_base::unique_id): Add. (fhandler_base::del_my_locks): New method. (get_ino): Rename from get_namehash. Change usage throughout Cygwin. (get_unique_id): New method. * fhandler.cc (fhandler_base::close): Call own del_my_locks method. Fix comment. (fhandler_base::fhandler_base): Accommodate new and changed members. (fhandler_base::fixup_after_fork): Call del_my_locks. (fhandler_base::fixup_after_exec): Ditto for files with close-on-exec flag set. * fhandler_disk_file.cc (get_ino_by_handle): Rename from readdir_get_ino_by_handle. Accommodate throughout. (fhandler_base::open_fs): Fill ino with inode number if FS has good inodes. Allocate a LUID and store in unique_id to recognize file descriptors referencing the same file object. * flock.cc: Drop flock TODO comments. Use explicit types __dev32_t and __ino64_t instead of dev_t and ino_t. (LOCK_OBJ_NAME_LEN): Change to reflect longer lf_id length. (get_obj_handle_count): New method. (lockf_t::lf_id): Change type to long long. (inode_t::get_lock_obj_handle_count): Drop in favor of static function get_obj_handle_count. (inode_t::del_locks): Remove. (inode_t::get): Add create_if_missing flag argument. (inode_t::del_my_locks): Reimplement to handle POSIX and BSD flock locks. Return if node can be deleted or not. (inode_t::~inode_t): Ditto. Close handles to i_dir and i_mtx. (fixup_lockf_after_fork): Remove. (fhandler_base::del_my_locks): New method. (fixup_lockf_after_exec): Check if node can be deleted. (inode_t::get): Only create node if create_if_missing is set. Lock the returned node here before unlocking the node list. (inode_t::get_all_locks_list): Accommodate new lf_id length. (inode_t::create_lock_obj): Ditto. (lockf_t::open_lock_obj): Ditto. Change return type to bool. De-const. Set lf_obj instead of returning a handle. (lockf_t::del_lock_obj): Call SetEvent only if new incoming parameters allow it. Explain how it's supposed to work. (fhandler_disk_file::lock): Only fetch file length in SEEK_END case. Use NtQueryInformationFile(FileStandardInformation) instead of calling fstat_by_handle. Always unlock node before returning. Use fhandler's unique id to create lf_id for BSD flock locks. Rely on node lock from inode_t::get. Call del_lock_obj on removed locks here to allow explicit unlocking. Delete node if no lock exists on the file anymore. (lf_setlock): Get file handle as additional parameter. Handle the fact that lf_getblock now always opens the attached event object. Reactivate erroneously applied patch which deactivates setting thread priority. Additionally handle blocking on BSD flock locks. (lf_clearlock): Get file handle as additional parameter. (lf_getlock): Close event handle opened by lf_getblock. (lf_getblock): Open potentially blocking event object here and check its signal state if it's a BSD flock lock. (lf_wakelock): Get file handle as additional parameter. * fork.cc (frok::child): Drop call to fixup_lockf_after_fork. * ntdll.h (struct _EVENT_BASIC_INFORMATION): Define. (enum _EVENT_INFORMATION_CLASS): Define. (NtQueryEvent): Declare. * fhandler.h (fhandler_base::fs_flags): Remove. (fhandler_base::set_fs_flags): Remove. (fhandler_base::get_fs_flags): Remove. * fhandler.cc (fhandler_base::write): Check for sparse file using pc.fs_flags(). * fhandler_disk_file.cc (fhandler_disk_file::ftruncate): Ditto. The return of the volume serial number in fs_info. * fhandler.h (get_dev): New method. * fhandler_disk_file.cc (fhandler_base::fstat_by_handle): Drop call to NtQueryVolumeInformationFile(FileFsVolumeInformation). Just use get_dev() method. * fhandler_fifo.cc (fhandler_fifo::open) Use device ID and inode number to generate fifo name. * path.h (fs_info::sernum): New member. (fs_info::serial_number): New method. (path_conv::fs_serial_number): New method. * path.cc (fs_info::update): Fetch volume serial number and store in sernum.
2008-04-01 02:03:25 +08:00
lf_next (NULL), lf_obj (NULL)
{}
* flock.cc (LOCK_OBJ_NAME_LEN): Change to accommodate extra lf_ver field. (class lockf_t): Add lf_ver field. (lockf_t::lockf_t): Initialize lf_ver to 0. (class inode_t): Change i_wait to i_cnt. Change comment to explain change in usage. (inode_t:use): Rename from wait. Make private. (inode_t::unuse): Rename from unwait. Make private. (inode_t::inuse): Rename from waiting. Make private. (inode_t::notused): New public method to set use count to 0. (inode_t::unlock_and_remove): New method to unlock node and to delete it if it's unused in current process. (fhandler_base::del_my_locks): Drop global list lock. Drop variable no_locks_left. Simpify unlocking and removing node by just calling unlock_and_remove. (fixup_lockf_after_exec): Call notused method for each node. (inode_t::get): Call use method. Lock node only if outside of list lock. (inode_t::get_all_locks_list): Accommodate additional lf_ver field when creating lockf_t structure from object name. (lockf_t::create_lock_obj_attr): Accommodate additional lf_ver field when creating object name from lockf_t structure. Handle STATUS_OBJECT_NAME_COLLISION gracefully in F_POSIX case as well. Change comment accordingly. Increment lf_ver field rather than high byte of lf_wid field. Simplify comment. (fhandler_disk_file::lock): Always call unlock_and_remove rather than just UNLOCK on node. (lf_setlock): Move ret definition where it's used. Drop unneeded tests for obj being not NULL. Only check for deadlock condition if the lock we're trying to establish is a POSIX lock. Revamp object collecting and wait code to cover all cases. Don't return with EDEADLK if blocking process can't be opened for synchronization in F_POSIX case, rather just wait like in F_FLOCK case. Change system_printf to debug_printf in that case. Only run WaitForMultipleObjects with high priority. Close obj and process handles prior to locking node.
2011-08-29 21:50:25 +08:00
lockf_t (class inode_t *node, class lockf_t **head,
2013-04-23 17:44:36 +08:00
short flags, short type, off_t start, off_t end,
* flock.cc (LOCK_OBJ_NAME_LEN): Change to accommodate extra lf_ver field. (class lockf_t): Add lf_ver field. (lockf_t::lockf_t): Initialize lf_ver to 0. (class inode_t): Change i_wait to i_cnt. Change comment to explain change in usage. (inode_t:use): Rename from wait. Make private. (inode_t::unuse): Rename from unwait. Make private. (inode_t::inuse): Rename from waiting. Make private. (inode_t::notused): New public method to set use count to 0. (inode_t::unlock_and_remove): New method to unlock node and to delete it if it's unused in current process. (fhandler_base::del_my_locks): Drop global list lock. Drop variable no_locks_left. Simpify unlocking and removing node by just calling unlock_and_remove. (fixup_lockf_after_exec): Call notused method for each node. (inode_t::get): Call use method. Lock node only if outside of list lock. (inode_t::get_all_locks_list): Accommodate additional lf_ver field when creating lockf_t structure from object name. (lockf_t::create_lock_obj_attr): Accommodate additional lf_ver field when creating object name from lockf_t structure. Handle STATUS_OBJECT_NAME_COLLISION gracefully in F_POSIX case as well. Change comment accordingly. Increment lf_ver field rather than high byte of lf_wid field. Simplify comment. (fhandler_disk_file::lock): Always call unlock_and_remove rather than just UNLOCK on node. (lf_setlock): Move ret definition where it's used. Drop unneeded tests for obj being not NULL. Only check for deadlock condition if the lock we're trying to establish is a POSIX lock. Revamp object collecting and wait code to cover all cases. Don't return with EDEADLK if blocking process can't be opened for synchronization in F_POSIX case, rather just wait like in F_FLOCK case. Change system_printf to debug_printf in that case. Only run WaitForMultipleObjects with high priority. Close obj and process handles prior to locking node.
2011-08-29 21:50:25 +08:00
long long id, DWORD wid, uint16_t ver)
: lf_flags (flags), lf_type (type), lf_start (start), lf_end (end),
* flock.cc (LOCK_OBJ_NAME_LEN): Change to accommodate extra lf_ver field. (class lockf_t): Add lf_ver field. (lockf_t::lockf_t): Initialize lf_ver to 0. (class inode_t): Change i_wait to i_cnt. Change comment to explain change in usage. (inode_t:use): Rename from wait. Make private. (inode_t::unuse): Rename from unwait. Make private. (inode_t::inuse): Rename from waiting. Make private. (inode_t::notused): New public method to set use count to 0. (inode_t::unlock_and_remove): New method to unlock node and to delete it if it's unused in current process. (fhandler_base::del_my_locks): Drop global list lock. Drop variable no_locks_left. Simpify unlocking and removing node by just calling unlock_and_remove. (fixup_lockf_after_exec): Call notused method for each node. (inode_t::get): Call use method. Lock node only if outside of list lock. (inode_t::get_all_locks_list): Accommodate additional lf_ver field when creating lockf_t structure from object name. (lockf_t::create_lock_obj_attr): Accommodate additional lf_ver field when creating object name from lockf_t structure. Handle STATUS_OBJECT_NAME_COLLISION gracefully in F_POSIX case as well. Change comment accordingly. Increment lf_ver field rather than high byte of lf_wid field. Simplify comment. (fhandler_disk_file::lock): Always call unlock_and_remove rather than just UNLOCK on node. (lf_setlock): Move ret definition where it's used. Drop unneeded tests for obj being not NULL. Only check for deadlock condition if the lock we're trying to establish is a POSIX lock. Revamp object collecting and wait code to cover all cases. Don't return with EDEADLK if blocking process can't be opened for synchronization in F_POSIX case, rather just wait like in F_FLOCK case. Change system_printf to debug_printf in that case. Only run WaitForMultipleObjects with high priority. Close obj and process handles prior to locking node.
2011-08-29 21:50:25 +08:00
lf_id (id), lf_wid (wid), lf_ver (ver), lf_head (head), lf_inode (node),
lf_next (NULL), lf_obj (NULL)
{}
~lockf_t ();
bool from_obj_name (class inode_t *node, class lockf_t **head,
const wchar_t *name);
/* Used to create all locks list in a given TLS buffer. */
void *operator new (size_t size, void *p)
{ return p; }
/* Used to store own lock list in the cygheap. */
void *operator new (size_t size)
{ return cmalloc (HEAP_FHANDLER, sizeof (lockf_t)); }
/* Never call on node->i_all_lf! */
void operator delete (void *p)
{ cfree (p); }
POBJECT_ATTRIBUTES create_lock_obj_attr (lockfattr_t *attr,
ULONG flags, void *sd_buf);
void create_lock_obj ();
* smallprint.cc (__small_vswprintf): Fix uninitialized usage of `w'. Revamp advisory file locking to avoid cross reference pointers as well as to allow BSD flock semantics. More agressively delete unused nodes and sync objects. * fhandler.h (fhandler_base::ino): Rename from namehash. Fix comment. (fhandler_base::node): Remove. (fhandler_base::unique_id): Add. (fhandler_base::del_my_locks): New method. (get_ino): Rename from get_namehash. Change usage throughout Cygwin. (get_unique_id): New method. * fhandler.cc (fhandler_base::close): Call own del_my_locks method. Fix comment. (fhandler_base::fhandler_base): Accommodate new and changed members. (fhandler_base::fixup_after_fork): Call del_my_locks. (fhandler_base::fixup_after_exec): Ditto for files with close-on-exec flag set. * fhandler_disk_file.cc (get_ino_by_handle): Rename from readdir_get_ino_by_handle. Accommodate throughout. (fhandler_base::open_fs): Fill ino with inode number if FS has good inodes. Allocate a LUID and store in unique_id to recognize file descriptors referencing the same file object. * flock.cc: Drop flock TODO comments. Use explicit types __dev32_t and __ino64_t instead of dev_t and ino_t. (LOCK_OBJ_NAME_LEN): Change to reflect longer lf_id length. (get_obj_handle_count): New method. (lockf_t::lf_id): Change type to long long. (inode_t::get_lock_obj_handle_count): Drop in favor of static function get_obj_handle_count. (inode_t::del_locks): Remove. (inode_t::get): Add create_if_missing flag argument. (inode_t::del_my_locks): Reimplement to handle POSIX and BSD flock locks. Return if node can be deleted or not. (inode_t::~inode_t): Ditto. Close handles to i_dir and i_mtx. (fixup_lockf_after_fork): Remove. (fhandler_base::del_my_locks): New method. (fixup_lockf_after_exec): Check if node can be deleted. (inode_t::get): Only create node if create_if_missing is set. Lock the returned node here before unlocking the node list. (inode_t::get_all_locks_list): Accommodate new lf_id length. (inode_t::create_lock_obj): Ditto. (lockf_t::open_lock_obj): Ditto. Change return type to bool. De-const. Set lf_obj instead of returning a handle. (lockf_t::del_lock_obj): Call SetEvent only if new incoming parameters allow it. Explain how it's supposed to work. (fhandler_disk_file::lock): Only fetch file length in SEEK_END case. Use NtQueryInformationFile(FileStandardInformation) instead of calling fstat_by_handle. Always unlock node before returning. Use fhandler's unique id to create lf_id for BSD flock locks. Rely on node lock from inode_t::get. Call del_lock_obj on removed locks here to allow explicit unlocking. Delete node if no lock exists on the file anymore. (lf_setlock): Get file handle as additional parameter. Handle the fact that lf_getblock now always opens the attached event object. Reactivate erroneously applied patch which deactivates setting thread priority. Additionally handle blocking on BSD flock locks. (lf_clearlock): Get file handle as additional parameter. (lf_getlock): Close event handle opened by lf_getblock. (lf_getblock): Open potentially blocking event object here and check its signal state if it's a BSD flock lock. (lf_wakelock): Get file handle as additional parameter. * fork.cc (frok::child): Drop call to fixup_lockf_after_fork. * ntdll.h (struct _EVENT_BASIC_INFORMATION): Define. (enum _EVENT_INFORMATION_CLASS): Define. (NtQueryEvent): Declare. * fhandler.h (fhandler_base::fs_flags): Remove. (fhandler_base::set_fs_flags): Remove. (fhandler_base::get_fs_flags): Remove. * fhandler.cc (fhandler_base::write): Check for sparse file using pc.fs_flags(). * fhandler_disk_file.cc (fhandler_disk_file::ftruncate): Ditto. The return of the volume serial number in fs_info. * fhandler.h (get_dev): New method. * fhandler_disk_file.cc (fhandler_base::fstat_by_handle): Drop call to NtQueryVolumeInformationFile(FileFsVolumeInformation). Just use get_dev() method. * fhandler_fifo.cc (fhandler_fifo::open) Use device ID and inode number to generate fifo name. * path.h (fs_info::sernum): New member. (fs_info::serial_number): New method. (path_conv::fs_serial_number): New method. * path.cc (fs_info::update): Fetch volume serial number and store in sernum.
2008-04-01 02:03:25 +08:00
bool open_lock_obj ();
void close_lock_obj () { NtClose (lf_obj); lf_obj = NULL; }
* smallprint.cc (__small_vswprintf): Fix uninitialized usage of `w'. Revamp advisory file locking to avoid cross reference pointers as well as to allow BSD flock semantics. More agressively delete unused nodes and sync objects. * fhandler.h (fhandler_base::ino): Rename from namehash. Fix comment. (fhandler_base::node): Remove. (fhandler_base::unique_id): Add. (fhandler_base::del_my_locks): New method. (get_ino): Rename from get_namehash. Change usage throughout Cygwin. (get_unique_id): New method. * fhandler.cc (fhandler_base::close): Call own del_my_locks method. Fix comment. (fhandler_base::fhandler_base): Accommodate new and changed members. (fhandler_base::fixup_after_fork): Call del_my_locks. (fhandler_base::fixup_after_exec): Ditto for files with close-on-exec flag set. * fhandler_disk_file.cc (get_ino_by_handle): Rename from readdir_get_ino_by_handle. Accommodate throughout. (fhandler_base::open_fs): Fill ino with inode number if FS has good inodes. Allocate a LUID and store in unique_id to recognize file descriptors referencing the same file object. * flock.cc: Drop flock TODO comments. Use explicit types __dev32_t and __ino64_t instead of dev_t and ino_t. (LOCK_OBJ_NAME_LEN): Change to reflect longer lf_id length. (get_obj_handle_count): New method. (lockf_t::lf_id): Change type to long long. (inode_t::get_lock_obj_handle_count): Drop in favor of static function get_obj_handle_count. (inode_t::del_locks): Remove. (inode_t::get): Add create_if_missing flag argument. (inode_t::del_my_locks): Reimplement to handle POSIX and BSD flock locks. Return if node can be deleted or not. (inode_t::~inode_t): Ditto. Close handles to i_dir and i_mtx. (fixup_lockf_after_fork): Remove. (fhandler_base::del_my_locks): New method. (fixup_lockf_after_exec): Check if node can be deleted. (inode_t::get): Only create node if create_if_missing is set. Lock the returned node here before unlocking the node list. (inode_t::get_all_locks_list): Accommodate new lf_id length. (inode_t::create_lock_obj): Ditto. (lockf_t::open_lock_obj): Ditto. Change return type to bool. De-const. Set lf_obj instead of returning a handle. (lockf_t::del_lock_obj): Call SetEvent only if new incoming parameters allow it. Explain how it's supposed to work. (fhandler_disk_file::lock): Only fetch file length in SEEK_END case. Use NtQueryInformationFile(FileStandardInformation) instead of calling fstat_by_handle. Always unlock node before returning. Use fhandler's unique id to create lf_id for BSD flock locks. Rely on node lock from inode_t::get. Call del_lock_obj on removed locks here to allow explicit unlocking. Delete node if no lock exists on the file anymore. (lf_setlock): Get file handle as additional parameter. Handle the fact that lf_getblock now always opens the attached event object. Reactivate erroneously applied patch which deactivates setting thread priority. Additionally handle blocking on BSD flock locks. (lf_clearlock): Get file handle as additional parameter. (lf_getlock): Close event handle opened by lf_getblock. (lf_getblock): Open potentially blocking event object here and check its signal state if it's a BSD flock lock. (lf_wakelock): Get file handle as additional parameter. * fork.cc (frok::child): Drop call to fixup_lockf_after_fork. * ntdll.h (struct _EVENT_BASIC_INFORMATION): Define. (enum _EVENT_INFORMATION_CLASS): Define. (NtQueryEvent): Declare. * fhandler.h (fhandler_base::fs_flags): Remove. (fhandler_base::set_fs_flags): Remove. (fhandler_base::get_fs_flags): Remove. * fhandler.cc (fhandler_base::write): Check for sparse file using pc.fs_flags(). * fhandler_disk_file.cc (fhandler_disk_file::ftruncate): Ditto. The return of the volume serial number in fs_info. * fhandler.h (get_dev): New method. * fhandler_disk_file.cc (fhandler_base::fstat_by_handle): Drop call to NtQueryVolumeInformationFile(FileFsVolumeInformation). Just use get_dev() method. * fhandler_fifo.cc (fhandler_fifo::open) Use device ID and inode number to generate fifo name. * path.h (fs_info::sernum): New member. (fs_info::serial_number): New method. (path_conv::fs_serial_number): New method. * path.cc (fs_info::update): Fetch volume serial number and store in sernum.
2008-04-01 02:03:25 +08:00
void del_lock_obj (HANDLE fhdl, bool signal = false);
};
/* Per inode_t class */
class inode_t
{
friend class lockf_t;
public:
* flock.cc (LOCK_OBJ_NAME_LEN): Change to accommodate extra lf_ver field. (class lockf_t): Add lf_ver field. (lockf_t::lockf_t): Initialize lf_ver to 0. (class inode_t): Change i_wait to i_cnt. Change comment to explain change in usage. (inode_t:use): Rename from wait. Make private. (inode_t::unuse): Rename from unwait. Make private. (inode_t::inuse): Rename from waiting. Make private. (inode_t::notused): New public method to set use count to 0. (inode_t::unlock_and_remove): New method to unlock node and to delete it if it's unused in current process. (fhandler_base::del_my_locks): Drop global list lock. Drop variable no_locks_left. Simpify unlocking and removing node by just calling unlock_and_remove. (fixup_lockf_after_exec): Call notused method for each node. (inode_t::get): Call use method. Lock node only if outside of list lock. (inode_t::get_all_locks_list): Accommodate additional lf_ver field when creating lockf_t structure from object name. (lockf_t::create_lock_obj_attr): Accommodate additional lf_ver field when creating object name from lockf_t structure. Handle STATUS_OBJECT_NAME_COLLISION gracefully in F_POSIX case as well. Change comment accordingly. Increment lf_ver field rather than high byte of lf_wid field. Simplify comment. (fhandler_disk_file::lock): Always call unlock_and_remove rather than just UNLOCK on node. (lf_setlock): Move ret definition where it's used. Drop unneeded tests for obj being not NULL. Only check for deadlock condition if the lock we're trying to establish is a POSIX lock. Revamp object collecting and wait code to cover all cases. Don't return with EDEADLK if blocking process can't be opened for synchronization in F_POSIX case, rather just wait like in F_FLOCK case. Change system_printf to debug_printf in that case. Only run WaitForMultipleObjects with high priority. Close obj and process handles prior to locking node.
2011-08-29 21:50:25 +08:00
LIST_ENTRY (inode_t) i_next;
lockf_t *i_lockf; /* List of locks of this process. */
lockf_t *i_all_lf; /* Temp list of all locks for this file. */
2013-04-23 17:44:36 +08:00
dev_t i_dev; /* Device ID */
ino_t i_ino; /* inode number */
* smallprint.cc (__small_vswprintf): Fix uninitialized usage of `w'. Revamp advisory file locking to avoid cross reference pointers as well as to allow BSD flock semantics. More agressively delete unused nodes and sync objects. * fhandler.h (fhandler_base::ino): Rename from namehash. Fix comment. (fhandler_base::node): Remove. (fhandler_base::unique_id): Add. (fhandler_base::del_my_locks): New method. (get_ino): Rename from get_namehash. Change usage throughout Cygwin. (get_unique_id): New method. * fhandler.cc (fhandler_base::close): Call own del_my_locks method. Fix comment. (fhandler_base::fhandler_base): Accommodate new and changed members. (fhandler_base::fixup_after_fork): Call del_my_locks. (fhandler_base::fixup_after_exec): Ditto for files with close-on-exec flag set. * fhandler_disk_file.cc (get_ino_by_handle): Rename from readdir_get_ino_by_handle. Accommodate throughout. (fhandler_base::open_fs): Fill ino with inode number if FS has good inodes. Allocate a LUID and store in unique_id to recognize file descriptors referencing the same file object. * flock.cc: Drop flock TODO comments. Use explicit types __dev32_t and __ino64_t instead of dev_t and ino_t. (LOCK_OBJ_NAME_LEN): Change to reflect longer lf_id length. (get_obj_handle_count): New method. (lockf_t::lf_id): Change type to long long. (inode_t::get_lock_obj_handle_count): Drop in favor of static function get_obj_handle_count. (inode_t::del_locks): Remove. (inode_t::get): Add create_if_missing flag argument. (inode_t::del_my_locks): Reimplement to handle POSIX and BSD flock locks. Return if node can be deleted or not. (inode_t::~inode_t): Ditto. Close handles to i_dir and i_mtx. (fixup_lockf_after_fork): Remove. (fhandler_base::del_my_locks): New method. (fixup_lockf_after_exec): Check if node can be deleted. (inode_t::get): Only create node if create_if_missing is set. Lock the returned node here before unlocking the node list. (inode_t::get_all_locks_list): Accommodate new lf_id length. (inode_t::create_lock_obj): Ditto. (lockf_t::open_lock_obj): Ditto. Change return type to bool. De-const. Set lf_obj instead of returning a handle. (lockf_t::del_lock_obj): Call SetEvent only if new incoming parameters allow it. Explain how it's supposed to work. (fhandler_disk_file::lock): Only fetch file length in SEEK_END case. Use NtQueryInformationFile(FileStandardInformation) instead of calling fstat_by_handle. Always unlock node before returning. Use fhandler's unique id to create lf_id for BSD flock locks. Rely on node lock from inode_t::get. Call del_lock_obj on removed locks here to allow explicit unlocking. Delete node if no lock exists on the file anymore. (lf_setlock): Get file handle as additional parameter. Handle the fact that lf_getblock now always opens the attached event object. Reactivate erroneously applied patch which deactivates setting thread priority. Additionally handle blocking on BSD flock locks. (lf_clearlock): Get file handle as additional parameter. (lf_getlock): Close event handle opened by lf_getblock. (lf_getblock): Open potentially blocking event object here and check its signal state if it's a BSD flock lock. (lf_wakelock): Get file handle as additional parameter. * fork.cc (frok::child): Drop call to fixup_lockf_after_fork. * ntdll.h (struct _EVENT_BASIC_INFORMATION): Define. (enum _EVENT_INFORMATION_CLASS): Define. (NtQueryEvent): Declare. * fhandler.h (fhandler_base::fs_flags): Remove. (fhandler_base::set_fs_flags): Remove. (fhandler_base::get_fs_flags): Remove. * fhandler.cc (fhandler_base::write): Check for sparse file using pc.fs_flags(). * fhandler_disk_file.cc (fhandler_disk_file::ftruncate): Ditto. The return of the volume serial number in fs_info. * fhandler.h (get_dev): New method. * fhandler_disk_file.cc (fhandler_base::fstat_by_handle): Drop call to NtQueryVolumeInformationFile(FileFsVolumeInformation). Just use get_dev() method. * fhandler_fifo.cc (fhandler_fifo::open) Use device ID and inode number to generate fifo name. * path.h (fs_info::sernum): New member. (fs_info::serial_number): New method. (path_conv::fs_serial_number): New method. * path.cc (fs_info::update): Fetch volume serial number and store in sernum.
2008-04-01 02:03:25 +08:00
private:
* flock.cc (LOCK_OBJ_NAME_LEN): Change to accommodate extra lf_ver field. (class lockf_t): Add lf_ver field. (lockf_t::lockf_t): Initialize lf_ver to 0. (class inode_t): Change i_wait to i_cnt. Change comment to explain change in usage. (inode_t:use): Rename from wait. Make private. (inode_t::unuse): Rename from unwait. Make private. (inode_t::inuse): Rename from waiting. Make private. (inode_t::notused): New public method to set use count to 0. (inode_t::unlock_and_remove): New method to unlock node and to delete it if it's unused in current process. (fhandler_base::del_my_locks): Drop global list lock. Drop variable no_locks_left. Simpify unlocking and removing node by just calling unlock_and_remove. (fixup_lockf_after_exec): Call notused method for each node. (inode_t::get): Call use method. Lock node only if outside of list lock. (inode_t::get_all_locks_list): Accommodate additional lf_ver field when creating lockf_t structure from object name. (lockf_t::create_lock_obj_attr): Accommodate additional lf_ver field when creating object name from lockf_t structure. Handle STATUS_OBJECT_NAME_COLLISION gracefully in F_POSIX case as well. Change comment accordingly. Increment lf_ver field rather than high byte of lf_wid field. Simplify comment. (fhandler_disk_file::lock): Always call unlock_and_remove rather than just UNLOCK on node. (lf_setlock): Move ret definition where it's used. Drop unneeded tests for obj being not NULL. Only check for deadlock condition if the lock we're trying to establish is a POSIX lock. Revamp object collecting and wait code to cover all cases. Don't return with EDEADLK if blocking process can't be opened for synchronization in F_POSIX case, rather just wait like in F_FLOCK case. Change system_printf to debug_printf in that case. Only run WaitForMultipleObjects with high priority. Close obj and process handles prior to locking node.
2011-08-29 21:50:25 +08:00
HANDLE i_dir;
HANDLE i_mtx;
uint32_t i_cnt; /* # of threads referencing this instance. */
public:
2013-04-23 17:44:36 +08:00
inode_t (dev_t dev, ino_t ino);
~inode_t ();
void *operator new (size_t size)
{ return cmalloc (HEAP_FHANDLER, sizeof (inode_t)); }
void operator delete (void *p)
{ cfree (p); }
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static inode_t *get (dev_t dev, ino_t ino,
bool create_if_missing, bool lock);
void LOCK () { WaitForSingleObject (i_mtx, INFINITE); }
void UNLOCK () { ReleaseMutex (i_mtx); }
void use () { ++i_cnt; }
void unuse () { if (i_cnt > 0) --i_cnt; }
bool inuse () { return i_cnt > 0; }
* flock.cc (LOCK_OBJ_NAME_LEN): Change to accommodate extra lf_ver field. (class lockf_t): Add lf_ver field. (lockf_t::lockf_t): Initialize lf_ver to 0. (class inode_t): Change i_wait to i_cnt. Change comment to explain change in usage. (inode_t:use): Rename from wait. Make private. (inode_t::unuse): Rename from unwait. Make private. (inode_t::inuse): Rename from waiting. Make private. (inode_t::notused): New public method to set use count to 0. (inode_t::unlock_and_remove): New method to unlock node and to delete it if it's unused in current process. (fhandler_base::del_my_locks): Drop global list lock. Drop variable no_locks_left. Simpify unlocking and removing node by just calling unlock_and_remove. (fixup_lockf_after_exec): Call notused method for each node. (inode_t::get): Call use method. Lock node only if outside of list lock. (inode_t::get_all_locks_list): Accommodate additional lf_ver field when creating lockf_t structure from object name. (lockf_t::create_lock_obj_attr): Accommodate additional lf_ver field when creating object name from lockf_t structure. Handle STATUS_OBJECT_NAME_COLLISION gracefully in F_POSIX case as well. Change comment accordingly. Increment lf_ver field rather than high byte of lf_wid field. Simplify comment. (fhandler_disk_file::lock): Always call unlock_and_remove rather than just UNLOCK on node. (lf_setlock): Move ret definition where it's used. Drop unneeded tests for obj being not NULL. Only check for deadlock condition if the lock we're trying to establish is a POSIX lock. Revamp object collecting and wait code to cover all cases. Don't return with EDEADLK if blocking process can't be opened for synchronization in F_POSIX case, rather just wait like in F_FLOCK case. Change system_printf to debug_printf in that case. Only run WaitForMultipleObjects with high priority. Close obj and process handles prior to locking node.
2011-08-29 21:50:25 +08:00
void notused () { i_cnt = 0; }
void unlock_and_remove_if_unused ();
lockf_t *get_all_locks_list ();
* smallprint.cc (__small_vswprintf): Fix uninitialized usage of `w'. Revamp advisory file locking to avoid cross reference pointers as well as to allow BSD flock semantics. More agressively delete unused nodes and sync objects. * fhandler.h (fhandler_base::ino): Rename from namehash. Fix comment. (fhandler_base::node): Remove. (fhandler_base::unique_id): Add. (fhandler_base::del_my_locks): New method. (get_ino): Rename from get_namehash. Change usage throughout Cygwin. (get_unique_id): New method. * fhandler.cc (fhandler_base::close): Call own del_my_locks method. Fix comment. (fhandler_base::fhandler_base): Accommodate new and changed members. (fhandler_base::fixup_after_fork): Call del_my_locks. (fhandler_base::fixup_after_exec): Ditto for files with close-on-exec flag set. * fhandler_disk_file.cc (get_ino_by_handle): Rename from readdir_get_ino_by_handle. Accommodate throughout. (fhandler_base::open_fs): Fill ino with inode number if FS has good inodes. Allocate a LUID and store in unique_id to recognize file descriptors referencing the same file object. * flock.cc: Drop flock TODO comments. Use explicit types __dev32_t and __ino64_t instead of dev_t and ino_t. (LOCK_OBJ_NAME_LEN): Change to reflect longer lf_id length. (get_obj_handle_count): New method. (lockf_t::lf_id): Change type to long long. (inode_t::get_lock_obj_handle_count): Drop in favor of static function get_obj_handle_count. (inode_t::del_locks): Remove. (inode_t::get): Add create_if_missing flag argument. (inode_t::del_my_locks): Reimplement to handle POSIX and BSD flock locks. Return if node can be deleted or not. (inode_t::~inode_t): Ditto. Close handles to i_dir and i_mtx. (fixup_lockf_after_fork): Remove. (fhandler_base::del_my_locks): New method. (fixup_lockf_after_exec): Check if node can be deleted. (inode_t::get): Only create node if create_if_missing is set. Lock the returned node here before unlocking the node list. (inode_t::get_all_locks_list): Accommodate new lf_id length. (inode_t::create_lock_obj): Ditto. (lockf_t::open_lock_obj): Ditto. Change return type to bool. De-const. Set lf_obj instead of returning a handle. (lockf_t::del_lock_obj): Call SetEvent only if new incoming parameters allow it. Explain how it's supposed to work. (fhandler_disk_file::lock): Only fetch file length in SEEK_END case. Use NtQueryInformationFile(FileStandardInformation) instead of calling fstat_by_handle. Always unlock node before returning. Use fhandler's unique id to create lf_id for BSD flock locks. Rely on node lock from inode_t::get. Call del_lock_obj on removed locks here to allow explicit unlocking. Delete node if no lock exists on the file anymore. (lf_setlock): Get file handle as additional parameter. Handle the fact that lf_getblock now always opens the attached event object. Reactivate erroneously applied patch which deactivates setting thread priority. Additionally handle blocking on BSD flock locks. (lf_clearlock): Get file handle as additional parameter. (lf_getlock): Close event handle opened by lf_getblock. (lf_getblock): Open potentially blocking event object here and check its signal state if it's a BSD flock lock. (lf_wakelock): Get file handle as additional parameter. * fork.cc (frok::child): Drop call to fixup_lockf_after_fork. * ntdll.h (struct _EVENT_BASIC_INFORMATION): Define. (enum _EVENT_INFORMATION_CLASS): Define. (NtQueryEvent): Declare. * fhandler.h (fhandler_base::fs_flags): Remove. (fhandler_base::set_fs_flags): Remove. (fhandler_base::get_fs_flags): Remove. * fhandler.cc (fhandler_base::write): Check for sparse file using pc.fs_flags(). * fhandler_disk_file.cc (fhandler_disk_file::ftruncate): Ditto. The return of the volume serial number in fs_info. * fhandler.h (get_dev): New method. * fhandler_disk_file.cc (fhandler_base::fstat_by_handle): Drop call to NtQueryVolumeInformationFile(FileFsVolumeInformation). Just use get_dev() method. * fhandler_fifo.cc (fhandler_fifo::open) Use device ID and inode number to generate fifo name. * path.h (fs_info::sernum): New member. (fs_info::serial_number): New method. (path_conv::fs_serial_number): New method. * path.cc (fs_info::update): Fetch volume serial number and store in sernum.
2008-04-01 02:03:25 +08:00
bool del_my_locks (long long id, HANDLE fhdl);
};
* smallprint.cc (__small_vswprintf): Fix uninitialized usage of `w'. Revamp advisory file locking to avoid cross reference pointers as well as to allow BSD flock semantics. More agressively delete unused nodes and sync objects. * fhandler.h (fhandler_base::ino): Rename from namehash. Fix comment. (fhandler_base::node): Remove. (fhandler_base::unique_id): Add. (fhandler_base::del_my_locks): New method. (get_ino): Rename from get_namehash. Change usage throughout Cygwin. (get_unique_id): New method. * fhandler.cc (fhandler_base::close): Call own del_my_locks method. Fix comment. (fhandler_base::fhandler_base): Accommodate new and changed members. (fhandler_base::fixup_after_fork): Call del_my_locks. (fhandler_base::fixup_after_exec): Ditto for files with close-on-exec flag set. * fhandler_disk_file.cc (get_ino_by_handle): Rename from readdir_get_ino_by_handle. Accommodate throughout. (fhandler_base::open_fs): Fill ino with inode number if FS has good inodes. Allocate a LUID and store in unique_id to recognize file descriptors referencing the same file object. * flock.cc: Drop flock TODO comments. Use explicit types __dev32_t and __ino64_t instead of dev_t and ino_t. (LOCK_OBJ_NAME_LEN): Change to reflect longer lf_id length. (get_obj_handle_count): New method. (lockf_t::lf_id): Change type to long long. (inode_t::get_lock_obj_handle_count): Drop in favor of static function get_obj_handle_count. (inode_t::del_locks): Remove. (inode_t::get): Add create_if_missing flag argument. (inode_t::del_my_locks): Reimplement to handle POSIX and BSD flock locks. Return if node can be deleted or not. (inode_t::~inode_t): Ditto. Close handles to i_dir and i_mtx. (fixup_lockf_after_fork): Remove. (fhandler_base::del_my_locks): New method. (fixup_lockf_after_exec): Check if node can be deleted. (inode_t::get): Only create node if create_if_missing is set. Lock the returned node here before unlocking the node list. (inode_t::get_all_locks_list): Accommodate new lf_id length. (inode_t::create_lock_obj): Ditto. (lockf_t::open_lock_obj): Ditto. Change return type to bool. De-const. Set lf_obj instead of returning a handle. (lockf_t::del_lock_obj): Call SetEvent only if new incoming parameters allow it. Explain how it's supposed to work. (fhandler_disk_file::lock): Only fetch file length in SEEK_END case. Use NtQueryInformationFile(FileStandardInformation) instead of calling fstat_by_handle. Always unlock node before returning. Use fhandler's unique id to create lf_id for BSD flock locks. Rely on node lock from inode_t::get. Call del_lock_obj on removed locks here to allow explicit unlocking. Delete node if no lock exists on the file anymore. (lf_setlock): Get file handle as additional parameter. Handle the fact that lf_getblock now always opens the attached event object. Reactivate erroneously applied patch which deactivates setting thread priority. Additionally handle blocking on BSD flock locks. (lf_clearlock): Get file handle as additional parameter. (lf_getlock): Close event handle opened by lf_getblock. (lf_getblock): Open potentially blocking event object here and check its signal state if it's a BSD flock lock. (lf_wakelock): Get file handle as additional parameter. * fork.cc (frok::child): Drop call to fixup_lockf_after_fork. * ntdll.h (struct _EVENT_BASIC_INFORMATION): Define. (enum _EVENT_INFORMATION_CLASS): Define. (NtQueryEvent): Declare. * fhandler.h (fhandler_base::fs_flags): Remove. (fhandler_base::set_fs_flags): Remove. (fhandler_base::get_fs_flags): Remove. * fhandler.cc (fhandler_base::write): Check for sparse file using pc.fs_flags(). * fhandler_disk_file.cc (fhandler_disk_file::ftruncate): Ditto. The return of the volume serial number in fs_info. * fhandler.h (get_dev): New method. * fhandler_disk_file.cc (fhandler_base::fstat_by_handle): Drop call to NtQueryVolumeInformationFile(FileFsVolumeInformation). Just use get_dev() method. * fhandler_fifo.cc (fhandler_fifo::open) Use device ID and inode number to generate fifo name. * path.h (fs_info::sernum): New member. (fs_info::serial_number): New method. (path_conv::fs_serial_number): New method. * path.cc (fs_info::update): Fetch volume serial number and store in sernum.
2008-04-01 02:03:25 +08:00
inode_t::~inode_t ()
{
* smallprint.cc (__small_vswprintf): Fix uninitialized usage of `w'. Revamp advisory file locking to avoid cross reference pointers as well as to allow BSD flock semantics. More agressively delete unused nodes and sync objects. * fhandler.h (fhandler_base::ino): Rename from namehash. Fix comment. (fhandler_base::node): Remove. (fhandler_base::unique_id): Add. (fhandler_base::del_my_locks): New method. (get_ino): Rename from get_namehash. Change usage throughout Cygwin. (get_unique_id): New method. * fhandler.cc (fhandler_base::close): Call own del_my_locks method. Fix comment. (fhandler_base::fhandler_base): Accommodate new and changed members. (fhandler_base::fixup_after_fork): Call del_my_locks. (fhandler_base::fixup_after_exec): Ditto for files with close-on-exec flag set. * fhandler_disk_file.cc (get_ino_by_handle): Rename from readdir_get_ino_by_handle. Accommodate throughout. (fhandler_base::open_fs): Fill ino with inode number if FS has good inodes. Allocate a LUID and store in unique_id to recognize file descriptors referencing the same file object. * flock.cc: Drop flock TODO comments. Use explicit types __dev32_t and __ino64_t instead of dev_t and ino_t. (LOCK_OBJ_NAME_LEN): Change to reflect longer lf_id length. (get_obj_handle_count): New method. (lockf_t::lf_id): Change type to long long. (inode_t::get_lock_obj_handle_count): Drop in favor of static function get_obj_handle_count. (inode_t::del_locks): Remove. (inode_t::get): Add create_if_missing flag argument. (inode_t::del_my_locks): Reimplement to handle POSIX and BSD flock locks. Return if node can be deleted or not. (inode_t::~inode_t): Ditto. Close handles to i_dir and i_mtx. (fixup_lockf_after_fork): Remove. (fhandler_base::del_my_locks): New method. (fixup_lockf_after_exec): Check if node can be deleted. (inode_t::get): Only create node if create_if_missing is set. Lock the returned node here before unlocking the node list. (inode_t::get_all_locks_list): Accommodate new lf_id length. (inode_t::create_lock_obj): Ditto. (lockf_t::open_lock_obj): Ditto. Change return type to bool. De-const. Set lf_obj instead of returning a handle. (lockf_t::del_lock_obj): Call SetEvent only if new incoming parameters allow it. Explain how it's supposed to work. (fhandler_disk_file::lock): Only fetch file length in SEEK_END case. Use NtQueryInformationFile(FileStandardInformation) instead of calling fstat_by_handle. Always unlock node before returning. Use fhandler's unique id to create lf_id for BSD flock locks. Rely on node lock from inode_t::get. Call del_lock_obj on removed locks here to allow explicit unlocking. Delete node if no lock exists on the file anymore. (lf_setlock): Get file handle as additional parameter. Handle the fact that lf_getblock now always opens the attached event object. Reactivate erroneously applied patch which deactivates setting thread priority. Additionally handle blocking on BSD flock locks. (lf_clearlock): Get file handle as additional parameter. (lf_getlock): Close event handle opened by lf_getblock. (lf_getblock): Open potentially blocking event object here and check its signal state if it's a BSD flock lock. (lf_wakelock): Get file handle as additional parameter. * fork.cc (frok::child): Drop call to fixup_lockf_after_fork. * ntdll.h (struct _EVENT_BASIC_INFORMATION): Define. (enum _EVENT_INFORMATION_CLASS): Define. (NtQueryEvent): Declare. * fhandler.h (fhandler_base::fs_flags): Remove. (fhandler_base::set_fs_flags): Remove. (fhandler_base::get_fs_flags): Remove. * fhandler.cc (fhandler_base::write): Check for sparse file using pc.fs_flags(). * fhandler_disk_file.cc (fhandler_disk_file::ftruncate): Ditto. The return of the volume serial number in fs_info. * fhandler.h (get_dev): New method. * fhandler_disk_file.cc (fhandler_base::fstat_by_handle): Drop call to NtQueryVolumeInformationFile(FileFsVolumeInformation). Just use get_dev() method. * fhandler_fifo.cc (fhandler_fifo::open) Use device ID and inode number to generate fifo name. * path.h (fs_info::sernum): New member. (fs_info::serial_number): New method. (path_conv::fs_serial_number): New method. * path.cc (fs_info::update): Fetch volume serial number and store in sernum.
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lockf_t *lock, *n_lock;
for (lock = i_lockf; lock && (n_lock = lock->lf_next, 1); lock = n_lock)
delete lock;
NtClose (i_mtx);
NtClose (i_dir);
}
* flock.cc (LOCK_OBJ_NAME_LEN): Change to accommodate extra lf_ver field. (class lockf_t): Add lf_ver field. (lockf_t::lockf_t): Initialize lf_ver to 0. (class inode_t): Change i_wait to i_cnt. Change comment to explain change in usage. (inode_t:use): Rename from wait. Make private. (inode_t::unuse): Rename from unwait. Make private. (inode_t::inuse): Rename from waiting. Make private. (inode_t::notused): New public method to set use count to 0. (inode_t::unlock_and_remove): New method to unlock node and to delete it if it's unused in current process. (fhandler_base::del_my_locks): Drop global list lock. Drop variable no_locks_left. Simpify unlocking and removing node by just calling unlock_and_remove. (fixup_lockf_after_exec): Call notused method for each node. (inode_t::get): Call use method. Lock node only if outside of list lock. (inode_t::get_all_locks_list): Accommodate additional lf_ver field when creating lockf_t structure from object name. (lockf_t::create_lock_obj_attr): Accommodate additional lf_ver field when creating object name from lockf_t structure. Handle STATUS_OBJECT_NAME_COLLISION gracefully in F_POSIX case as well. Change comment accordingly. Increment lf_ver field rather than high byte of lf_wid field. Simplify comment. (fhandler_disk_file::lock): Always call unlock_and_remove rather than just UNLOCK on node. (lf_setlock): Move ret definition where it's used. Drop unneeded tests for obj being not NULL. Only check for deadlock condition if the lock we're trying to establish is a POSIX lock. Revamp object collecting and wait code to cover all cases. Don't return with EDEADLK if blocking process can't be opened for synchronization in F_POSIX case, rather just wait like in F_FLOCK case. Change system_printf to debug_printf in that case. Only run WaitForMultipleObjects with high priority. Close obj and process handles prior to locking node.
2011-08-29 21:50:25 +08:00
void
inode_t::unlock_and_remove_if_unused ()
* flock.cc (LOCK_OBJ_NAME_LEN): Change to accommodate extra lf_ver field. (class lockf_t): Add lf_ver field. (lockf_t::lockf_t): Initialize lf_ver to 0. (class inode_t): Change i_wait to i_cnt. Change comment to explain change in usage. (inode_t:use): Rename from wait. Make private. (inode_t::unuse): Rename from unwait. Make private. (inode_t::inuse): Rename from waiting. Make private. (inode_t::notused): New public method to set use count to 0. (inode_t::unlock_and_remove): New method to unlock node and to delete it if it's unused in current process. (fhandler_base::del_my_locks): Drop global list lock. Drop variable no_locks_left. Simpify unlocking and removing node by just calling unlock_and_remove. (fixup_lockf_after_exec): Call notused method for each node. (inode_t::get): Call use method. Lock node only if outside of list lock. (inode_t::get_all_locks_list): Accommodate additional lf_ver field when creating lockf_t structure from object name. (lockf_t::create_lock_obj_attr): Accommodate additional lf_ver field when creating object name from lockf_t structure. Handle STATUS_OBJECT_NAME_COLLISION gracefully in F_POSIX case as well. Change comment accordingly. Increment lf_ver field rather than high byte of lf_wid field. Simplify comment. (fhandler_disk_file::lock): Always call unlock_and_remove rather than just UNLOCK on node. (lf_setlock): Move ret definition where it's used. Drop unneeded tests for obj being not NULL. Only check for deadlock condition if the lock we're trying to establish is a POSIX lock. Revamp object collecting and wait code to cover all cases. Don't return with EDEADLK if blocking process can't be opened for synchronization in F_POSIX case, rather just wait like in F_FLOCK case. Change system_printf to debug_printf in that case. Only run WaitForMultipleObjects with high priority. Close obj and process handles prior to locking node.
2011-08-29 21:50:25 +08:00
{
UNLOCK ();
INODE_LIST_LOCK ();
unuse ();
if (i_lockf == NULL && !inuse ())
{
LIST_REMOVE (this, i_next);
delete this;
}
INODE_LIST_UNLOCK ();
}
* smallprint.cc (__small_vswprintf): Fix uninitialized usage of `w'. Revamp advisory file locking to avoid cross reference pointers as well as to allow BSD flock semantics. More agressively delete unused nodes and sync objects. * fhandler.h (fhandler_base::ino): Rename from namehash. Fix comment. (fhandler_base::node): Remove. (fhandler_base::unique_id): Add. (fhandler_base::del_my_locks): New method. (get_ino): Rename from get_namehash. Change usage throughout Cygwin. (get_unique_id): New method. * fhandler.cc (fhandler_base::close): Call own del_my_locks method. Fix comment. (fhandler_base::fhandler_base): Accommodate new and changed members. (fhandler_base::fixup_after_fork): Call del_my_locks. (fhandler_base::fixup_after_exec): Ditto for files with close-on-exec flag set. * fhandler_disk_file.cc (get_ino_by_handle): Rename from readdir_get_ino_by_handle. Accommodate throughout. (fhandler_base::open_fs): Fill ino with inode number if FS has good inodes. Allocate a LUID and store in unique_id to recognize file descriptors referencing the same file object. * flock.cc: Drop flock TODO comments. Use explicit types __dev32_t and __ino64_t instead of dev_t and ino_t. (LOCK_OBJ_NAME_LEN): Change to reflect longer lf_id length. (get_obj_handle_count): New method. (lockf_t::lf_id): Change type to long long. (inode_t::get_lock_obj_handle_count): Drop in favor of static function get_obj_handle_count. (inode_t::del_locks): Remove. (inode_t::get): Add create_if_missing flag argument. (inode_t::del_my_locks): Reimplement to handle POSIX and BSD flock locks. Return if node can be deleted or not. (inode_t::~inode_t): Ditto. Close handles to i_dir and i_mtx. (fixup_lockf_after_fork): Remove. (fhandler_base::del_my_locks): New method. (fixup_lockf_after_exec): Check if node can be deleted. (inode_t::get): Only create node if create_if_missing is set. Lock the returned node here before unlocking the node list. (inode_t::get_all_locks_list): Accommodate new lf_id length. (inode_t::create_lock_obj): Ditto. (lockf_t::open_lock_obj): Ditto. Change return type to bool. De-const. Set lf_obj instead of returning a handle. (lockf_t::del_lock_obj): Call SetEvent only if new incoming parameters allow it. Explain how it's supposed to work. (fhandler_disk_file::lock): Only fetch file length in SEEK_END case. Use NtQueryInformationFile(FileStandardInformation) instead of calling fstat_by_handle. Always unlock node before returning. Use fhandler's unique id to create lf_id for BSD flock locks. Rely on node lock from inode_t::get. Call del_lock_obj on removed locks here to allow explicit unlocking. Delete node if no lock exists on the file anymore. (lf_setlock): Get file handle as additional parameter. Handle the fact that lf_getblock now always opens the attached event object. Reactivate erroneously applied patch which deactivates setting thread priority. Additionally handle blocking on BSD flock locks. (lf_clearlock): Get file handle as additional parameter. (lf_getlock): Close event handle opened by lf_getblock. (lf_getblock): Open potentially blocking event object here and check its signal state if it's a BSD flock lock. (lf_wakelock): Get file handle as additional parameter. * fork.cc (frok::child): Drop call to fixup_lockf_after_fork. * ntdll.h (struct _EVENT_BASIC_INFORMATION): Define. (enum _EVENT_INFORMATION_CLASS): Define. (NtQueryEvent): Declare. * fhandler.h (fhandler_base::fs_flags): Remove. (fhandler_base::set_fs_flags): Remove. (fhandler_base::get_fs_flags): Remove. * fhandler.cc (fhandler_base::write): Check for sparse file using pc.fs_flags(). * fhandler_disk_file.cc (fhandler_disk_file::ftruncate): Ditto. The return of the volume serial number in fs_info. * fhandler.h (get_dev): New method. * fhandler_disk_file.cc (fhandler_base::fstat_by_handle): Drop call to NtQueryVolumeInformationFile(FileFsVolumeInformation). Just use get_dev() method. * fhandler_fifo.cc (fhandler_fifo::open) Use device ID and inode number to generate fifo name. * path.h (fs_info::sernum): New member. (fs_info::serial_number): New method. (path_conv::fs_serial_number): New method. * path.cc (fs_info::update): Fetch volume serial number and store in sernum.
2008-04-01 02:03:25 +08:00
bool
inode_t::del_my_locks (long long id, HANDLE fhdl)
{
* smallprint.cc (__small_vswprintf): Fix uninitialized usage of `w'. Revamp advisory file locking to avoid cross reference pointers as well as to allow BSD flock semantics. More agressively delete unused nodes and sync objects. * fhandler.h (fhandler_base::ino): Rename from namehash. Fix comment. (fhandler_base::node): Remove. (fhandler_base::unique_id): Add. (fhandler_base::del_my_locks): New method. (get_ino): Rename from get_namehash. Change usage throughout Cygwin. (get_unique_id): New method. * fhandler.cc (fhandler_base::close): Call own del_my_locks method. Fix comment. (fhandler_base::fhandler_base): Accommodate new and changed members. (fhandler_base::fixup_after_fork): Call del_my_locks. (fhandler_base::fixup_after_exec): Ditto for files with close-on-exec flag set. * fhandler_disk_file.cc (get_ino_by_handle): Rename from readdir_get_ino_by_handle. Accommodate throughout. (fhandler_base::open_fs): Fill ino with inode number if FS has good inodes. Allocate a LUID and store in unique_id to recognize file descriptors referencing the same file object. * flock.cc: Drop flock TODO comments. Use explicit types __dev32_t and __ino64_t instead of dev_t and ino_t. (LOCK_OBJ_NAME_LEN): Change to reflect longer lf_id length. (get_obj_handle_count): New method. (lockf_t::lf_id): Change type to long long. (inode_t::get_lock_obj_handle_count): Drop in favor of static function get_obj_handle_count. (inode_t::del_locks): Remove. (inode_t::get): Add create_if_missing flag argument. (inode_t::del_my_locks): Reimplement to handle POSIX and BSD flock locks. Return if node can be deleted or not. (inode_t::~inode_t): Ditto. Close handles to i_dir and i_mtx. (fixup_lockf_after_fork): Remove. (fhandler_base::del_my_locks): New method. (fixup_lockf_after_exec): Check if node can be deleted. (inode_t::get): Only create node if create_if_missing is set. Lock the returned node here before unlocking the node list. (inode_t::get_all_locks_list): Accommodate new lf_id length. (inode_t::create_lock_obj): Ditto. (lockf_t::open_lock_obj): Ditto. Change return type to bool. De-const. Set lf_obj instead of returning a handle. (lockf_t::del_lock_obj): Call SetEvent only if new incoming parameters allow it. Explain how it's supposed to work. (fhandler_disk_file::lock): Only fetch file length in SEEK_END case. Use NtQueryInformationFile(FileStandardInformation) instead of calling fstat_by_handle. Always unlock node before returning. Use fhandler's unique id to create lf_id for BSD flock locks. Rely on node lock from inode_t::get. Call del_lock_obj on removed locks here to allow explicit unlocking. Delete node if no lock exists on the file anymore. (lf_setlock): Get file handle as additional parameter. Handle the fact that lf_getblock now always opens the attached event object. Reactivate erroneously applied patch which deactivates setting thread priority. Additionally handle blocking on BSD flock locks. (lf_clearlock): Get file handle as additional parameter. (lf_getlock): Close event handle opened by lf_getblock. (lf_getblock): Open potentially blocking event object here and check its signal state if it's a BSD flock lock. (lf_wakelock): Get file handle as additional parameter. * fork.cc (frok::child): Drop call to fixup_lockf_after_fork. * ntdll.h (struct _EVENT_BASIC_INFORMATION): Define. (enum _EVENT_INFORMATION_CLASS): Define. (NtQueryEvent): Declare. * fhandler.h (fhandler_base::fs_flags): Remove. (fhandler_base::set_fs_flags): Remove. (fhandler_base::get_fs_flags): Remove. * fhandler.cc (fhandler_base::write): Check for sparse file using pc.fs_flags(). * fhandler_disk_file.cc (fhandler_disk_file::ftruncate): Ditto. The return of the volume serial number in fs_info. * fhandler.h (get_dev): New method. * fhandler_disk_file.cc (fhandler_base::fstat_by_handle): Drop call to NtQueryVolumeInformationFile(FileFsVolumeInformation). Just use get_dev() method. * fhandler_fifo.cc (fhandler_fifo::open) Use device ID and inode number to generate fifo name. * path.h (fs_info::sernum): New member. (fs_info::serial_number): New method. (path_conv::fs_serial_number): New method. * path.cc (fs_info::update): Fetch volume serial number and store in sernum.
2008-04-01 02:03:25 +08:00
lockf_t *lock, *n_lock;
lockf_t **prev = &i_lockf;
for (lock = *prev; lock && (n_lock = lock->lf_next, 1); lock = n_lock)
{
if (lock->lf_flags & F_POSIX)
{
/* Delete all POSIX locks. */
*prev = n_lock;
/* When called during fork, the POSIX lock must get deleted but
*not* signalled. The lock is still active and locked in the
parent. So in case of fork, we call close_lock_obj explicitely,
since del_lock_obj is called from the destructor. */
if (!id)
lock->close_lock_obj ();
* smallprint.cc (__small_vswprintf): Fix uninitialized usage of `w'. Revamp advisory file locking to avoid cross reference pointers as well as to allow BSD flock semantics. More agressively delete unused nodes and sync objects. * fhandler.h (fhandler_base::ino): Rename from namehash. Fix comment. (fhandler_base::node): Remove. (fhandler_base::unique_id): Add. (fhandler_base::del_my_locks): New method. (get_ino): Rename from get_namehash. Change usage throughout Cygwin. (get_unique_id): New method. * fhandler.cc (fhandler_base::close): Call own del_my_locks method. Fix comment. (fhandler_base::fhandler_base): Accommodate new and changed members. (fhandler_base::fixup_after_fork): Call del_my_locks. (fhandler_base::fixup_after_exec): Ditto for files with close-on-exec flag set. * fhandler_disk_file.cc (get_ino_by_handle): Rename from readdir_get_ino_by_handle. Accommodate throughout. (fhandler_base::open_fs): Fill ino with inode number if FS has good inodes. Allocate a LUID and store in unique_id to recognize file descriptors referencing the same file object. * flock.cc: Drop flock TODO comments. Use explicit types __dev32_t and __ino64_t instead of dev_t and ino_t. (LOCK_OBJ_NAME_LEN): Change to reflect longer lf_id length. (get_obj_handle_count): New method. (lockf_t::lf_id): Change type to long long. (inode_t::get_lock_obj_handle_count): Drop in favor of static function get_obj_handle_count. (inode_t::del_locks): Remove. (inode_t::get): Add create_if_missing flag argument. (inode_t::del_my_locks): Reimplement to handle POSIX and BSD flock locks. Return if node can be deleted or not. (inode_t::~inode_t): Ditto. Close handles to i_dir and i_mtx. (fixup_lockf_after_fork): Remove. (fhandler_base::del_my_locks): New method. (fixup_lockf_after_exec): Check if node can be deleted. (inode_t::get): Only create node if create_if_missing is set. Lock the returned node here before unlocking the node list. (inode_t::get_all_locks_list): Accommodate new lf_id length. (inode_t::create_lock_obj): Ditto. (lockf_t::open_lock_obj): Ditto. Change return type to bool. De-const. Set lf_obj instead of returning a handle. (lockf_t::del_lock_obj): Call SetEvent only if new incoming parameters allow it. Explain how it's supposed to work. (fhandler_disk_file::lock): Only fetch file length in SEEK_END case. Use NtQueryInformationFile(FileStandardInformation) instead of calling fstat_by_handle. Always unlock node before returning. Use fhandler's unique id to create lf_id for BSD flock locks. Rely on node lock from inode_t::get. Call del_lock_obj on removed locks here to allow explicit unlocking. Delete node if no lock exists on the file anymore. (lf_setlock): Get file handle as additional parameter. Handle the fact that lf_getblock now always opens the attached event object. Reactivate erroneously applied patch which deactivates setting thread priority. Additionally handle blocking on BSD flock locks. (lf_clearlock): Get file handle as additional parameter. (lf_getlock): Close event handle opened by lf_getblock. (lf_getblock): Open potentially blocking event object here and check its signal state if it's a BSD flock lock. (lf_wakelock): Get file handle as additional parameter. * fork.cc (frok::child): Drop call to fixup_lockf_after_fork. * ntdll.h (struct _EVENT_BASIC_INFORMATION): Define. (enum _EVENT_INFORMATION_CLASS): Define. (NtQueryEvent): Declare. * fhandler.h (fhandler_base::fs_flags): Remove. (fhandler_base::set_fs_flags): Remove. (fhandler_base::get_fs_flags): Remove. * fhandler.cc (fhandler_base::write): Check for sparse file using pc.fs_flags(). * fhandler_disk_file.cc (fhandler_disk_file::ftruncate): Ditto. The return of the volume serial number in fs_info. * fhandler.h (get_dev): New method. * fhandler_disk_file.cc (fhandler_base::fstat_by_handle): Drop call to NtQueryVolumeInformationFile(FileFsVolumeInformation). Just use get_dev() method. * fhandler_fifo.cc (fhandler_fifo::open) Use device ID and inode number to generate fifo name. * path.h (fs_info::sernum): New member. (fs_info::serial_number): New method. (path_conv::fs_serial_number): New method. * path.cc (fs_info::update): Fetch volume serial number and store in sernum.
2008-04-01 02:03:25 +08:00
delete lock;
}
else if (id && lock->lf_id == id)
{
int cnt = 0;
cygheap_fdenum cfd (true);
while (cfd.next () >= 0)
if (cfd->get_unique_id () == lock->lf_id && ++cnt > 1)
break;
/* Delete BSD flock lock when no other fd in this process references
it anymore. */
if (cnt <= 1)
{
*prev = n_lock;
lock->del_lock_obj (fhdl);
delete lock;
}
}
else
prev = &lock->lf_next;
}
return i_lockf == NULL;
}
* smallprint.cc (__small_vswprintf): Fix uninitialized usage of `w'. Revamp advisory file locking to avoid cross reference pointers as well as to allow BSD flock semantics. More agressively delete unused nodes and sync objects. * fhandler.h (fhandler_base::ino): Rename from namehash. Fix comment. (fhandler_base::node): Remove. (fhandler_base::unique_id): Add. (fhandler_base::del_my_locks): New method. (get_ino): Rename from get_namehash. Change usage throughout Cygwin. (get_unique_id): New method. * fhandler.cc (fhandler_base::close): Call own del_my_locks method. Fix comment. (fhandler_base::fhandler_base): Accommodate new and changed members. (fhandler_base::fixup_after_fork): Call del_my_locks. (fhandler_base::fixup_after_exec): Ditto for files with close-on-exec flag set. * fhandler_disk_file.cc (get_ino_by_handle): Rename from readdir_get_ino_by_handle. Accommodate throughout. (fhandler_base::open_fs): Fill ino with inode number if FS has good inodes. Allocate a LUID and store in unique_id to recognize file descriptors referencing the same file object. * flock.cc: Drop flock TODO comments. Use explicit types __dev32_t and __ino64_t instead of dev_t and ino_t. (LOCK_OBJ_NAME_LEN): Change to reflect longer lf_id length. (get_obj_handle_count): New method. (lockf_t::lf_id): Change type to long long. (inode_t::get_lock_obj_handle_count): Drop in favor of static function get_obj_handle_count. (inode_t::del_locks): Remove. (inode_t::get): Add create_if_missing flag argument. (inode_t::del_my_locks): Reimplement to handle POSIX and BSD flock locks. Return if node can be deleted or not. (inode_t::~inode_t): Ditto. Close handles to i_dir and i_mtx. (fixup_lockf_after_fork): Remove. (fhandler_base::del_my_locks): New method. (fixup_lockf_after_exec): Check if node can be deleted. (inode_t::get): Only create node if create_if_missing is set. Lock the returned node here before unlocking the node list. (inode_t::get_all_locks_list): Accommodate new lf_id length. (inode_t::create_lock_obj): Ditto. (lockf_t::open_lock_obj): Ditto. Change return type to bool. De-const. Set lf_obj instead of returning a handle. (lockf_t::del_lock_obj): Call SetEvent only if new incoming parameters allow it. Explain how it's supposed to work. (fhandler_disk_file::lock): Only fetch file length in SEEK_END case. Use NtQueryInformationFile(FileStandardInformation) instead of calling fstat_by_handle. Always unlock node before returning. Use fhandler's unique id to create lf_id for BSD flock locks. Rely on node lock from inode_t::get. Call del_lock_obj on removed locks here to allow explicit unlocking. Delete node if no lock exists on the file anymore. (lf_setlock): Get file handle as additional parameter. Handle the fact that lf_getblock now always opens the attached event object. Reactivate erroneously applied patch which deactivates setting thread priority. Additionally handle blocking on BSD flock locks. (lf_clearlock): Get file handle as additional parameter. (lf_getlock): Close event handle opened by lf_getblock. (lf_getblock): Open potentially blocking event object here and check its signal state if it's a BSD flock lock. (lf_wakelock): Get file handle as additional parameter. * fork.cc (frok::child): Drop call to fixup_lockf_after_fork. * ntdll.h (struct _EVENT_BASIC_INFORMATION): Define. (enum _EVENT_INFORMATION_CLASS): Define. (NtQueryEvent): Declare. * fhandler.h (fhandler_base::fs_flags): Remove. (fhandler_base::set_fs_flags): Remove. (fhandler_base::get_fs_flags): Remove. * fhandler.cc (fhandler_base::write): Check for sparse file using pc.fs_flags(). * fhandler_disk_file.cc (fhandler_disk_file::ftruncate): Ditto. The return of the volume serial number in fs_info. * fhandler.h (get_dev): New method. * fhandler_disk_file.cc (fhandler_base::fstat_by_handle): Drop call to NtQueryVolumeInformationFile(FileFsVolumeInformation). Just use get_dev() method. * fhandler_fifo.cc (fhandler_fifo::open) Use device ID and inode number to generate fifo name. * path.h (fs_info::sernum): New member. (fs_info::serial_number): New method. (path_conv::fs_serial_number): New method. * path.cc (fs_info::update): Fetch volume serial number and store in sernum.
2008-04-01 02:03:25 +08:00
/* Used to delete the locks on a file hold by this process. Called from
close(2) and fixup_after_fork, as well as from fixup_after_exec in
case the close_on_exec flag is set. The whole inode is deleted as
soon as no lock exists on it anymore. */
void
fhandler_base::del_my_locks (del_lock_called_from from)
* smallprint.cc (__small_vswprintf): Fix uninitialized usage of `w'. Revamp advisory file locking to avoid cross reference pointers as well as to allow BSD flock semantics. More agressively delete unused nodes and sync objects. * fhandler.h (fhandler_base::ino): Rename from namehash. Fix comment. (fhandler_base::node): Remove. (fhandler_base::unique_id): Add. (fhandler_base::del_my_locks): New method. (get_ino): Rename from get_namehash. Change usage throughout Cygwin. (get_unique_id): New method. * fhandler.cc (fhandler_base::close): Call own del_my_locks method. Fix comment. (fhandler_base::fhandler_base): Accommodate new and changed members. (fhandler_base::fixup_after_fork): Call del_my_locks. (fhandler_base::fixup_after_exec): Ditto for files with close-on-exec flag set. * fhandler_disk_file.cc (get_ino_by_handle): Rename from readdir_get_ino_by_handle. Accommodate throughout. (fhandler_base::open_fs): Fill ino with inode number if FS has good inodes. Allocate a LUID and store in unique_id to recognize file descriptors referencing the same file object. * flock.cc: Drop flock TODO comments. Use explicit types __dev32_t and __ino64_t instead of dev_t and ino_t. (LOCK_OBJ_NAME_LEN): Change to reflect longer lf_id length. (get_obj_handle_count): New method. (lockf_t::lf_id): Change type to long long. (inode_t::get_lock_obj_handle_count): Drop in favor of static function get_obj_handle_count. (inode_t::del_locks): Remove. (inode_t::get): Add create_if_missing flag argument. (inode_t::del_my_locks): Reimplement to handle POSIX and BSD flock locks. Return if node can be deleted or not. (inode_t::~inode_t): Ditto. Close handles to i_dir and i_mtx. (fixup_lockf_after_fork): Remove. (fhandler_base::del_my_locks): New method. (fixup_lockf_after_exec): Check if node can be deleted. (inode_t::get): Only create node if create_if_missing is set. Lock the returned node here before unlocking the node list. (inode_t::get_all_locks_list): Accommodate new lf_id length. (inode_t::create_lock_obj): Ditto. (lockf_t::open_lock_obj): Ditto. Change return type to bool. De-const. Set lf_obj instead of returning a handle. (lockf_t::del_lock_obj): Call SetEvent only if new incoming parameters allow it. Explain how it's supposed to work. (fhandler_disk_file::lock): Only fetch file length in SEEK_END case. Use NtQueryInformationFile(FileStandardInformation) instead of calling fstat_by_handle. Always unlock node before returning. Use fhandler's unique id to create lf_id for BSD flock locks. Rely on node lock from inode_t::get. Call del_lock_obj on removed locks here to allow explicit unlocking. Delete node if no lock exists on the file anymore. (lf_setlock): Get file handle as additional parameter. Handle the fact that lf_getblock now always opens the attached event object. Reactivate erroneously applied patch which deactivates setting thread priority. Additionally handle blocking on BSD flock locks. (lf_clearlock): Get file handle as additional parameter. (lf_getlock): Close event handle opened by lf_getblock. (lf_getblock): Open potentially blocking event object here and check its signal state if it's a BSD flock lock. (lf_wakelock): Get file handle as additional parameter. * fork.cc (frok::child): Drop call to fixup_lockf_after_fork. * ntdll.h (struct _EVENT_BASIC_INFORMATION): Define. (enum _EVENT_INFORMATION_CLASS): Define. (NtQueryEvent): Declare. * fhandler.h (fhandler_base::fs_flags): Remove. (fhandler_base::set_fs_flags): Remove. (fhandler_base::get_fs_flags): Remove. * fhandler.cc (fhandler_base::write): Check for sparse file using pc.fs_flags(). * fhandler_disk_file.cc (fhandler_disk_file::ftruncate): Ditto. The return of the volume serial number in fs_info. * fhandler.h (get_dev): New method. * fhandler_disk_file.cc (fhandler_base::fstat_by_handle): Drop call to NtQueryVolumeInformationFile(FileFsVolumeInformation). Just use get_dev() method. * fhandler_fifo.cc (fhandler_fifo::open) Use device ID and inode number to generate fifo name. * path.h (fs_info::sernum): New member. (fs_info::serial_number): New method. (path_conv::fs_serial_number): New method. * path.cc (fs_info::update): Fetch volume serial number and store in sernum.
2008-04-01 02:03:25 +08:00
{
inode_t *node = inode_t::get (get_dev (), get_ino (), false, true);
* smallprint.cc (__small_vswprintf): Fix uninitialized usage of `w'. Revamp advisory file locking to avoid cross reference pointers as well as to allow BSD flock semantics. More agressively delete unused nodes and sync objects. * fhandler.h (fhandler_base::ino): Rename from namehash. Fix comment. (fhandler_base::node): Remove. (fhandler_base::unique_id): Add. (fhandler_base::del_my_locks): New method. (get_ino): Rename from get_namehash. Change usage throughout Cygwin. (get_unique_id): New method. * fhandler.cc (fhandler_base::close): Call own del_my_locks method. Fix comment. (fhandler_base::fhandler_base): Accommodate new and changed members. (fhandler_base::fixup_after_fork): Call del_my_locks. (fhandler_base::fixup_after_exec): Ditto for files with close-on-exec flag set. * fhandler_disk_file.cc (get_ino_by_handle): Rename from readdir_get_ino_by_handle. Accommodate throughout. (fhandler_base::open_fs): Fill ino with inode number if FS has good inodes. Allocate a LUID and store in unique_id to recognize file descriptors referencing the same file object. * flock.cc: Drop flock TODO comments. Use explicit types __dev32_t and __ino64_t instead of dev_t and ino_t. (LOCK_OBJ_NAME_LEN): Change to reflect longer lf_id length. (get_obj_handle_count): New method. (lockf_t::lf_id): Change type to long long. (inode_t::get_lock_obj_handle_count): Drop in favor of static function get_obj_handle_count. (inode_t::del_locks): Remove. (inode_t::get): Add create_if_missing flag argument. (inode_t::del_my_locks): Reimplement to handle POSIX and BSD flock locks. Return if node can be deleted or not. (inode_t::~inode_t): Ditto. Close handles to i_dir and i_mtx. (fixup_lockf_after_fork): Remove. (fhandler_base::del_my_locks): New method. (fixup_lockf_after_exec): Check if node can be deleted. (inode_t::get): Only create node if create_if_missing is set. Lock the returned node here before unlocking the node list. (inode_t::get_all_locks_list): Accommodate new lf_id length. (inode_t::create_lock_obj): Ditto. (lockf_t::open_lock_obj): Ditto. Change return type to bool. De-const. Set lf_obj instead of returning a handle. (lockf_t::del_lock_obj): Call SetEvent only if new incoming parameters allow it. Explain how it's supposed to work. (fhandler_disk_file::lock): Only fetch file length in SEEK_END case. Use NtQueryInformationFile(FileStandardInformation) instead of calling fstat_by_handle. Always unlock node before returning. Use fhandler's unique id to create lf_id for BSD flock locks. Rely on node lock from inode_t::get. Call del_lock_obj on removed locks here to allow explicit unlocking. Delete node if no lock exists on the file anymore. (lf_setlock): Get file handle as additional parameter. Handle the fact that lf_getblock now always opens the attached event object. Reactivate erroneously applied patch which deactivates setting thread priority. Additionally handle blocking on BSD flock locks. (lf_clearlock): Get file handle as additional parameter. (lf_getlock): Close event handle opened by lf_getblock. (lf_getblock): Open potentially blocking event object here and check its signal state if it's a BSD flock lock. (lf_wakelock): Get file handle as additional parameter. * fork.cc (frok::child): Drop call to fixup_lockf_after_fork. * ntdll.h (struct _EVENT_BASIC_INFORMATION): Define. (enum _EVENT_INFORMATION_CLASS): Define. (NtQueryEvent): Declare. * fhandler.h (fhandler_base::fs_flags): Remove. (fhandler_base::set_fs_flags): Remove. (fhandler_base::get_fs_flags): Remove. * fhandler.cc (fhandler_base::write): Check for sparse file using pc.fs_flags(). * fhandler_disk_file.cc (fhandler_disk_file::ftruncate): Ditto. The return of the volume serial number in fs_info. * fhandler.h (get_dev): New method. * fhandler_disk_file.cc (fhandler_base::fstat_by_handle): Drop call to NtQueryVolumeInformationFile(FileFsVolumeInformation). Just use get_dev() method. * fhandler_fifo.cc (fhandler_fifo::open) Use device ID and inode number to generate fifo name. * path.h (fs_info::sernum): New member. (fs_info::serial_number): New method. (path_conv::fs_serial_number): New method. * path.cc (fs_info::update): Fetch volume serial number and store in sernum.
2008-04-01 02:03:25 +08:00
if (node)
{
/* When we're called from fixup_after_exec, the fhandler is a
close-on-exec fhandler. In this case our io handle is already
invalid. We can't use it to test for the object reference count.
However, that shouldn't be necessary for the following reason.
After exec, there are no threads in the current process waiting for
the lock. So, either we're the only process accessing the file table
entry and there are no threads which require signalling, or we have
a parent process still accessing the file object and signalling the
lock event would be premature. */
* flock.cc (LOCK_OBJ_NAME_LEN): Change to accommodate extra lf_ver field. (class lockf_t): Add lf_ver field. (lockf_t::lockf_t): Initialize lf_ver to 0. (class inode_t): Change i_wait to i_cnt. Change comment to explain change in usage. (inode_t:use): Rename from wait. Make private. (inode_t::unuse): Rename from unwait. Make private. (inode_t::inuse): Rename from waiting. Make private. (inode_t::notused): New public method to set use count to 0. (inode_t::unlock_and_remove): New method to unlock node and to delete it if it's unused in current process. (fhandler_base::del_my_locks): Drop global list lock. Drop variable no_locks_left. Simpify unlocking and removing node by just calling unlock_and_remove. (fixup_lockf_after_exec): Call notused method for each node. (inode_t::get): Call use method. Lock node only if outside of list lock. (inode_t::get_all_locks_list): Accommodate additional lf_ver field when creating lockf_t structure from object name. (lockf_t::create_lock_obj_attr): Accommodate additional lf_ver field when creating object name from lockf_t structure. Handle STATUS_OBJECT_NAME_COLLISION gracefully in F_POSIX case as well. Change comment accordingly. Increment lf_ver field rather than high byte of lf_wid field. Simplify comment. (fhandler_disk_file::lock): Always call unlock_and_remove rather than just UNLOCK on node. (lf_setlock): Move ret definition where it's used. Drop unneeded tests for obj being not NULL. Only check for deadlock condition if the lock we're trying to establish is a POSIX lock. Revamp object collecting and wait code to cover all cases. Don't return with EDEADLK if blocking process can't be opened for synchronization in F_POSIX case, rather just wait like in F_FLOCK case. Change system_printf to debug_printf in that case. Only run WaitForMultipleObjects with high priority. Close obj and process handles prior to locking node.
2011-08-29 21:50:25 +08:00
node->del_my_locks (from == after_fork ? 0 : get_unique_id (),
from == after_exec ? NULL : get_handle ());
node->unlock_and_remove_if_unused ();
* smallprint.cc (__small_vswprintf): Fix uninitialized usage of `w'. Revamp advisory file locking to avoid cross reference pointers as well as to allow BSD flock semantics. More agressively delete unused nodes and sync objects. * fhandler.h (fhandler_base::ino): Rename from namehash. Fix comment. (fhandler_base::node): Remove. (fhandler_base::unique_id): Add. (fhandler_base::del_my_locks): New method. (get_ino): Rename from get_namehash. Change usage throughout Cygwin. (get_unique_id): New method. * fhandler.cc (fhandler_base::close): Call own del_my_locks method. Fix comment. (fhandler_base::fhandler_base): Accommodate new and changed members. (fhandler_base::fixup_after_fork): Call del_my_locks. (fhandler_base::fixup_after_exec): Ditto for files with close-on-exec flag set. * fhandler_disk_file.cc (get_ino_by_handle): Rename from readdir_get_ino_by_handle. Accommodate throughout. (fhandler_base::open_fs): Fill ino with inode number if FS has good inodes. Allocate a LUID and store in unique_id to recognize file descriptors referencing the same file object. * flock.cc: Drop flock TODO comments. Use explicit types __dev32_t and __ino64_t instead of dev_t and ino_t. (LOCK_OBJ_NAME_LEN): Change to reflect longer lf_id length. (get_obj_handle_count): New method. (lockf_t::lf_id): Change type to long long. (inode_t::get_lock_obj_handle_count): Drop in favor of static function get_obj_handle_count. (inode_t::del_locks): Remove. (inode_t::get): Add create_if_missing flag argument. (inode_t::del_my_locks): Reimplement to handle POSIX and BSD flock locks. Return if node can be deleted or not. (inode_t::~inode_t): Ditto. Close handles to i_dir and i_mtx. (fixup_lockf_after_fork): Remove. (fhandler_base::del_my_locks): New method. (fixup_lockf_after_exec): Check if node can be deleted. (inode_t::get): Only create node if create_if_missing is set. Lock the returned node here before unlocking the node list. (inode_t::get_all_locks_list): Accommodate new lf_id length. (inode_t::create_lock_obj): Ditto. (lockf_t::open_lock_obj): Ditto. Change return type to bool. De-const. Set lf_obj instead of returning a handle. (lockf_t::del_lock_obj): Call SetEvent only if new incoming parameters allow it. Explain how it's supposed to work. (fhandler_disk_file::lock): Only fetch file length in SEEK_END case. Use NtQueryInformationFile(FileStandardInformation) instead of calling fstat_by_handle. Always unlock node before returning. Use fhandler's unique id to create lf_id for BSD flock locks. Rely on node lock from inode_t::get. Call del_lock_obj on removed locks here to allow explicit unlocking. Delete node if no lock exists on the file anymore. (lf_setlock): Get file handle as additional parameter. Handle the fact that lf_getblock now always opens the attached event object. Reactivate erroneously applied patch which deactivates setting thread priority. Additionally handle blocking on BSD flock locks. (lf_clearlock): Get file handle as additional parameter. (lf_getlock): Close event handle opened by lf_getblock. (lf_getblock): Open potentially blocking event object here and check its signal state if it's a BSD flock lock. (lf_wakelock): Get file handle as additional parameter. * fork.cc (frok::child): Drop call to fixup_lockf_after_fork. * ntdll.h (struct _EVENT_BASIC_INFORMATION): Define. (enum _EVENT_INFORMATION_CLASS): Define. (NtQueryEvent): Declare. * fhandler.h (fhandler_base::fs_flags): Remove. (fhandler_base::set_fs_flags): Remove. (fhandler_base::get_fs_flags): Remove. * fhandler.cc (fhandler_base::write): Check for sparse file using pc.fs_flags(). * fhandler_disk_file.cc (fhandler_disk_file::ftruncate): Ditto. The return of the volume serial number in fs_info. * fhandler.h (get_dev): New method. * fhandler_disk_file.cc (fhandler_base::fstat_by_handle): Drop call to NtQueryVolumeInformationFile(FileFsVolumeInformation). Just use get_dev() method. * fhandler_fifo.cc (fhandler_fifo::open) Use device ID and inode number to generate fifo name. * path.h (fs_info::sernum): New member. (fs_info::serial_number): New method. (path_conv::fs_serial_number): New method. * path.cc (fs_info::update): Fetch volume serial number and store in sernum.
2008-04-01 02:03:25 +08:00
}
}
/* Called in an execed child. The exec'ed process must allow SYNCHRONIZE
access to everyone if at least one inode exists.
* smallprint.cc (__small_vswprintf): Fix uninitialized usage of `w'. Revamp advisory file locking to avoid cross reference pointers as well as to allow BSD flock semantics. More agressively delete unused nodes and sync objects. * fhandler.h (fhandler_base::ino): Rename from namehash. Fix comment. (fhandler_base::node): Remove. (fhandler_base::unique_id): Add. (fhandler_base::del_my_locks): New method. (get_ino): Rename from get_namehash. Change usage throughout Cygwin. (get_unique_id): New method. * fhandler.cc (fhandler_base::close): Call own del_my_locks method. Fix comment. (fhandler_base::fhandler_base): Accommodate new and changed members. (fhandler_base::fixup_after_fork): Call del_my_locks. (fhandler_base::fixup_after_exec): Ditto for files with close-on-exec flag set. * fhandler_disk_file.cc (get_ino_by_handle): Rename from readdir_get_ino_by_handle. Accommodate throughout. (fhandler_base::open_fs): Fill ino with inode number if FS has good inodes. Allocate a LUID and store in unique_id to recognize file descriptors referencing the same file object. * flock.cc: Drop flock TODO comments. Use explicit types __dev32_t and __ino64_t instead of dev_t and ino_t. (LOCK_OBJ_NAME_LEN): Change to reflect longer lf_id length. (get_obj_handle_count): New method. (lockf_t::lf_id): Change type to long long. (inode_t::get_lock_obj_handle_count): Drop in favor of static function get_obj_handle_count. (inode_t::del_locks): Remove. (inode_t::get): Add create_if_missing flag argument. (inode_t::del_my_locks): Reimplement to handle POSIX and BSD flock locks. Return if node can be deleted or not. (inode_t::~inode_t): Ditto. Close handles to i_dir and i_mtx. (fixup_lockf_after_fork): Remove. (fhandler_base::del_my_locks): New method. (fixup_lockf_after_exec): Check if node can be deleted. (inode_t::get): Only create node if create_if_missing is set. Lock the returned node here before unlocking the node list. (inode_t::get_all_locks_list): Accommodate new lf_id length. (inode_t::create_lock_obj): Ditto. (lockf_t::open_lock_obj): Ditto. Change return type to bool. De-const. Set lf_obj instead of returning a handle. (lockf_t::del_lock_obj): Call SetEvent only if new incoming parameters allow it. Explain how it's supposed to work. (fhandler_disk_file::lock): Only fetch file length in SEEK_END case. Use NtQueryInformationFile(FileStandardInformation) instead of calling fstat_by_handle. Always unlock node before returning. Use fhandler's unique id to create lf_id for BSD flock locks. Rely on node lock from inode_t::get. Call del_lock_obj on removed locks here to allow explicit unlocking. Delete node if no lock exists on the file anymore. (lf_setlock): Get file handle as additional parameter. Handle the fact that lf_getblock now always opens the attached event object. Reactivate erroneously applied patch which deactivates setting thread priority. Additionally handle blocking on BSD flock locks. (lf_clearlock): Get file handle as additional parameter. (lf_getlock): Close event handle opened by lf_getblock. (lf_getblock): Open potentially blocking event object here and check its signal state if it's a BSD flock lock. (lf_wakelock): Get file handle as additional parameter. * fork.cc (frok::child): Drop call to fixup_lockf_after_fork. * ntdll.h (struct _EVENT_BASIC_INFORMATION): Define. (enum _EVENT_INFORMATION_CLASS): Define. (NtQueryEvent): Declare. * fhandler.h (fhandler_base::fs_flags): Remove. (fhandler_base::set_fs_flags): Remove. (fhandler_base::get_fs_flags): Remove. * fhandler.cc (fhandler_base::write): Check for sparse file using pc.fs_flags(). * fhandler_disk_file.cc (fhandler_disk_file::ftruncate): Ditto. The return of the volume serial number in fs_info. * fhandler.h (get_dev): New method. * fhandler_disk_file.cc (fhandler_base::fstat_by_handle): Drop call to NtQueryVolumeInformationFile(FileFsVolumeInformation). Just use get_dev() method. * fhandler_fifo.cc (fhandler_fifo::open) Use device ID and inode number to generate fifo name. * path.h (fs_info::sernum): New member. (fs_info::serial_number): New method. (path_conv::fs_serial_number): New method. * path.cc (fs_info::update): Fetch volume serial number and store in sernum.
2008-04-01 02:03:25 +08:00
The lock owner's Windows PID changed and all POSIX lock event objects
have to be relabeled so that waiting processes know which process to
wait on. If the node has been abandoned due to close_on_exec on the
referencing fhandlers, remove the inode entirely. */
void
fixup_lockf_after_exec (bool exec)
{
* smallprint.cc (__small_vswprintf): Fix uninitialized usage of `w'. Revamp advisory file locking to avoid cross reference pointers as well as to allow BSD flock semantics. More agressively delete unused nodes and sync objects. * fhandler.h (fhandler_base::ino): Rename from namehash. Fix comment. (fhandler_base::node): Remove. (fhandler_base::unique_id): Add. (fhandler_base::del_my_locks): New method. (get_ino): Rename from get_namehash. Change usage throughout Cygwin. (get_unique_id): New method. * fhandler.cc (fhandler_base::close): Call own del_my_locks method. Fix comment. (fhandler_base::fhandler_base): Accommodate new and changed members. (fhandler_base::fixup_after_fork): Call del_my_locks. (fhandler_base::fixup_after_exec): Ditto for files with close-on-exec flag set. * fhandler_disk_file.cc (get_ino_by_handle): Rename from readdir_get_ino_by_handle. Accommodate throughout. (fhandler_base::open_fs): Fill ino with inode number if FS has good inodes. Allocate a LUID and store in unique_id to recognize file descriptors referencing the same file object. * flock.cc: Drop flock TODO comments. Use explicit types __dev32_t and __ino64_t instead of dev_t and ino_t. (LOCK_OBJ_NAME_LEN): Change to reflect longer lf_id length. (get_obj_handle_count): New method. (lockf_t::lf_id): Change type to long long. (inode_t::get_lock_obj_handle_count): Drop in favor of static function get_obj_handle_count. (inode_t::del_locks): Remove. (inode_t::get): Add create_if_missing flag argument. (inode_t::del_my_locks): Reimplement to handle POSIX and BSD flock locks. Return if node can be deleted or not. (inode_t::~inode_t): Ditto. Close handles to i_dir and i_mtx. (fixup_lockf_after_fork): Remove. (fhandler_base::del_my_locks): New method. (fixup_lockf_after_exec): Check if node can be deleted. (inode_t::get): Only create node if create_if_missing is set. Lock the returned node here before unlocking the node list. (inode_t::get_all_locks_list): Accommodate new lf_id length. (inode_t::create_lock_obj): Ditto. (lockf_t::open_lock_obj): Ditto. Change return type to bool. De-const. Set lf_obj instead of returning a handle. (lockf_t::del_lock_obj): Call SetEvent only if new incoming parameters allow it. Explain how it's supposed to work. (fhandler_disk_file::lock): Only fetch file length in SEEK_END case. Use NtQueryInformationFile(FileStandardInformation) instead of calling fstat_by_handle. Always unlock node before returning. Use fhandler's unique id to create lf_id for BSD flock locks. Rely on node lock from inode_t::get. Call del_lock_obj on removed locks here to allow explicit unlocking. Delete node if no lock exists on the file anymore. (lf_setlock): Get file handle as additional parameter. Handle the fact that lf_getblock now always opens the attached event object. Reactivate erroneously applied patch which deactivates setting thread priority. Additionally handle blocking on BSD flock locks. (lf_clearlock): Get file handle as additional parameter. (lf_getlock): Close event handle opened by lf_getblock. (lf_getblock): Open potentially blocking event object here and check its signal state if it's a BSD flock lock. (lf_wakelock): Get file handle as additional parameter. * fork.cc (frok::child): Drop call to fixup_lockf_after_fork. * ntdll.h (struct _EVENT_BASIC_INFORMATION): Define. (enum _EVENT_INFORMATION_CLASS): Define. (NtQueryEvent): Declare. * fhandler.h (fhandler_base::fs_flags): Remove. (fhandler_base::set_fs_flags): Remove. (fhandler_base::get_fs_flags): Remove. * fhandler.cc (fhandler_base::write): Check for sparse file using pc.fs_flags(). * fhandler_disk_file.cc (fhandler_disk_file::ftruncate): Ditto. The return of the volume serial number in fs_info. * fhandler.h (get_dev): New method. * fhandler_disk_file.cc (fhandler_base::fstat_by_handle): Drop call to NtQueryVolumeInformationFile(FileFsVolumeInformation). Just use get_dev() method. * fhandler_fifo.cc (fhandler_fifo::open) Use device ID and inode number to generate fifo name. * path.h (fs_info::sernum): New member. (fs_info::serial_number): New method. (path_conv::fs_serial_number): New method. * path.cc (fs_info::update): Fetch volume serial number and store in sernum.
2008-04-01 02:03:25 +08:00
inode_t *node, *next_node;
INODE_LIST_LOCK ();
if (LIST_FIRST (&cygheap->inode_list))
allow_others_to_sync ();
* smallprint.cc (__small_vswprintf): Fix uninitialized usage of `w'. Revamp advisory file locking to avoid cross reference pointers as well as to allow BSD flock semantics. More agressively delete unused nodes and sync objects. * fhandler.h (fhandler_base::ino): Rename from namehash. Fix comment. (fhandler_base::node): Remove. (fhandler_base::unique_id): Add. (fhandler_base::del_my_locks): New method. (get_ino): Rename from get_namehash. Change usage throughout Cygwin. (get_unique_id): New method. * fhandler.cc (fhandler_base::close): Call own del_my_locks method. Fix comment. (fhandler_base::fhandler_base): Accommodate new and changed members. (fhandler_base::fixup_after_fork): Call del_my_locks. (fhandler_base::fixup_after_exec): Ditto for files with close-on-exec flag set. * fhandler_disk_file.cc (get_ino_by_handle): Rename from readdir_get_ino_by_handle. Accommodate throughout. (fhandler_base::open_fs): Fill ino with inode number if FS has good inodes. Allocate a LUID and store in unique_id to recognize file descriptors referencing the same file object. * flock.cc: Drop flock TODO comments. Use explicit types __dev32_t and __ino64_t instead of dev_t and ino_t. (LOCK_OBJ_NAME_LEN): Change to reflect longer lf_id length. (get_obj_handle_count): New method. (lockf_t::lf_id): Change type to long long. (inode_t::get_lock_obj_handle_count): Drop in favor of static function get_obj_handle_count. (inode_t::del_locks): Remove. (inode_t::get): Add create_if_missing flag argument. (inode_t::del_my_locks): Reimplement to handle POSIX and BSD flock locks. Return if node can be deleted or not. (inode_t::~inode_t): Ditto. Close handles to i_dir and i_mtx. (fixup_lockf_after_fork): Remove. (fhandler_base::del_my_locks): New method. (fixup_lockf_after_exec): Check if node can be deleted. (inode_t::get): Only create node if create_if_missing is set. Lock the returned node here before unlocking the node list. (inode_t::get_all_locks_list): Accommodate new lf_id length. (inode_t::create_lock_obj): Ditto. (lockf_t::open_lock_obj): Ditto. Change return type to bool. De-const. Set lf_obj instead of returning a handle. (lockf_t::del_lock_obj): Call SetEvent only if new incoming parameters allow it. Explain how it's supposed to work. (fhandler_disk_file::lock): Only fetch file length in SEEK_END case. Use NtQueryInformationFile(FileStandardInformation) instead of calling fstat_by_handle. Always unlock node before returning. Use fhandler's unique id to create lf_id for BSD flock locks. Rely on node lock from inode_t::get. Call del_lock_obj on removed locks here to allow explicit unlocking. Delete node if no lock exists on the file anymore. (lf_setlock): Get file handle as additional parameter. Handle the fact that lf_getblock now always opens the attached event object. Reactivate erroneously applied patch which deactivates setting thread priority. Additionally handle blocking on BSD flock locks. (lf_clearlock): Get file handle as additional parameter. (lf_getlock): Close event handle opened by lf_getblock. (lf_getblock): Open potentially blocking event object here and check its signal state if it's a BSD flock lock. (lf_wakelock): Get file handle as additional parameter. * fork.cc (frok::child): Drop call to fixup_lockf_after_fork. * ntdll.h (struct _EVENT_BASIC_INFORMATION): Define. (enum _EVENT_INFORMATION_CLASS): Define. (NtQueryEvent): Declare. * fhandler.h (fhandler_base::fs_flags): Remove. (fhandler_base::set_fs_flags): Remove. (fhandler_base::get_fs_flags): Remove. * fhandler.cc (fhandler_base::write): Check for sparse file using pc.fs_flags(). * fhandler_disk_file.cc (fhandler_disk_file::ftruncate): Ditto. The return of the volume serial number in fs_info. * fhandler.h (get_dev): New method. * fhandler_disk_file.cc (fhandler_base::fstat_by_handle): Drop call to NtQueryVolumeInformationFile(FileFsVolumeInformation). Just use get_dev() method. * fhandler_fifo.cc (fhandler_fifo::open) Use device ID and inode number to generate fifo name. * path.h (fs_info::sernum): New member. (fs_info::serial_number): New method. (path_conv::fs_serial_number): New method. * path.cc (fs_info::update): Fetch volume serial number and store in sernum.
2008-04-01 02:03:25 +08:00
LIST_FOREACH_SAFE (node, &cygheap->inode_list, i_next, next_node)
{
* flock.cc (LOCK_OBJ_NAME_LEN): Change to accommodate extra lf_ver field. (class lockf_t): Add lf_ver field. (lockf_t::lockf_t): Initialize lf_ver to 0. (class inode_t): Change i_wait to i_cnt. Change comment to explain change in usage. (inode_t:use): Rename from wait. Make private. (inode_t::unuse): Rename from unwait. Make private. (inode_t::inuse): Rename from waiting. Make private. (inode_t::notused): New public method to set use count to 0. (inode_t::unlock_and_remove): New method to unlock node and to delete it if it's unused in current process. (fhandler_base::del_my_locks): Drop global list lock. Drop variable no_locks_left. Simpify unlocking and removing node by just calling unlock_and_remove. (fixup_lockf_after_exec): Call notused method for each node. (inode_t::get): Call use method. Lock node only if outside of list lock. (inode_t::get_all_locks_list): Accommodate additional lf_ver field when creating lockf_t structure from object name. (lockf_t::create_lock_obj_attr): Accommodate additional lf_ver field when creating object name from lockf_t structure. Handle STATUS_OBJECT_NAME_COLLISION gracefully in F_POSIX case as well. Change comment accordingly. Increment lf_ver field rather than high byte of lf_wid field. Simplify comment. (fhandler_disk_file::lock): Always call unlock_and_remove rather than just UNLOCK on node. (lf_setlock): Move ret definition where it's used. Drop unneeded tests for obj being not NULL. Only check for deadlock condition if the lock we're trying to establish is a POSIX lock. Revamp object collecting and wait code to cover all cases. Don't return with EDEADLK if blocking process can't be opened for synchronization in F_POSIX case, rather just wait like in F_FLOCK case. Change system_printf to debug_printf in that case. Only run WaitForMultipleObjects with high priority. Close obj and process handles prior to locking node.
2011-08-29 21:50:25 +08:00
node->notused ();
* smallprint.cc (__small_vswprintf): Fix uninitialized usage of `w'. Revamp advisory file locking to avoid cross reference pointers as well as to allow BSD flock semantics. More agressively delete unused nodes and sync objects. * fhandler.h (fhandler_base::ino): Rename from namehash. Fix comment. (fhandler_base::node): Remove. (fhandler_base::unique_id): Add. (fhandler_base::del_my_locks): New method. (get_ino): Rename from get_namehash. Change usage throughout Cygwin. (get_unique_id): New method. * fhandler.cc (fhandler_base::close): Call own del_my_locks method. Fix comment. (fhandler_base::fhandler_base): Accommodate new and changed members. (fhandler_base::fixup_after_fork): Call del_my_locks. (fhandler_base::fixup_after_exec): Ditto for files with close-on-exec flag set. * fhandler_disk_file.cc (get_ino_by_handle): Rename from readdir_get_ino_by_handle. Accommodate throughout. (fhandler_base::open_fs): Fill ino with inode number if FS has good inodes. Allocate a LUID and store in unique_id to recognize file descriptors referencing the same file object. * flock.cc: Drop flock TODO comments. Use explicit types __dev32_t and __ino64_t instead of dev_t and ino_t. (LOCK_OBJ_NAME_LEN): Change to reflect longer lf_id length. (get_obj_handle_count): New method. (lockf_t::lf_id): Change type to long long. (inode_t::get_lock_obj_handle_count): Drop in favor of static function get_obj_handle_count. (inode_t::del_locks): Remove. (inode_t::get): Add create_if_missing flag argument. (inode_t::del_my_locks): Reimplement to handle POSIX and BSD flock locks. Return if node can be deleted or not. (inode_t::~inode_t): Ditto. Close handles to i_dir and i_mtx. (fixup_lockf_after_fork): Remove. (fhandler_base::del_my_locks): New method. (fixup_lockf_after_exec): Check if node can be deleted. (inode_t::get): Only create node if create_if_missing is set. Lock the returned node here before unlocking the node list. (inode_t::get_all_locks_list): Accommodate new lf_id length. (inode_t::create_lock_obj): Ditto. (lockf_t::open_lock_obj): Ditto. Change return type to bool. De-const. Set lf_obj instead of returning a handle. (lockf_t::del_lock_obj): Call SetEvent only if new incoming parameters allow it. Explain how it's supposed to work. (fhandler_disk_file::lock): Only fetch file length in SEEK_END case. Use NtQueryInformationFile(FileStandardInformation) instead of calling fstat_by_handle. Always unlock node before returning. Use fhandler's unique id to create lf_id for BSD flock locks. Rely on node lock from inode_t::get. Call del_lock_obj on removed locks here to allow explicit unlocking. Delete node if no lock exists on the file anymore. (lf_setlock): Get file handle as additional parameter. Handle the fact that lf_getblock now always opens the attached event object. Reactivate erroneously applied patch which deactivates setting thread priority. Additionally handle blocking on BSD flock locks. (lf_clearlock): Get file handle as additional parameter. (lf_getlock): Close event handle opened by lf_getblock. (lf_getblock): Open potentially blocking event object here and check its signal state if it's a BSD flock lock. (lf_wakelock): Get file handle as additional parameter. * fork.cc (frok::child): Drop call to fixup_lockf_after_fork. * ntdll.h (struct _EVENT_BASIC_INFORMATION): Define. (enum _EVENT_INFORMATION_CLASS): Define. (NtQueryEvent): Declare. * fhandler.h (fhandler_base::fs_flags): Remove. (fhandler_base::set_fs_flags): Remove. (fhandler_base::get_fs_flags): Remove. * fhandler.cc (fhandler_base::write): Check for sparse file using pc.fs_flags(). * fhandler_disk_file.cc (fhandler_disk_file::ftruncate): Ditto. The return of the volume serial number in fs_info. * fhandler.h (get_dev): New method. * fhandler_disk_file.cc (fhandler_base::fstat_by_handle): Drop call to NtQueryVolumeInformationFile(FileFsVolumeInformation). Just use get_dev() method. * fhandler_fifo.cc (fhandler_fifo::open) Use device ID and inode number to generate fifo name. * path.h (fs_info::sernum): New member. (fs_info::serial_number): New method. (path_conv::fs_serial_number): New method. * path.cc (fs_info::update): Fetch volume serial number and store in sernum.
2008-04-01 02:03:25 +08:00
int cnt = 0;
cygheap_fdenum cfd (true);
while (cfd.next () >= 0)
if (cfd->get_dev () == node->i_dev
&& cfd->get_ino () == node->i_ino
&& ++cnt >= 1)
* smallprint.cc (__small_vswprintf): Fix uninitialized usage of `w'. Revamp advisory file locking to avoid cross reference pointers as well as to allow BSD flock semantics. More agressively delete unused nodes and sync objects. * fhandler.h (fhandler_base::ino): Rename from namehash. Fix comment. (fhandler_base::node): Remove. (fhandler_base::unique_id): Add. (fhandler_base::del_my_locks): New method. (get_ino): Rename from get_namehash. Change usage throughout Cygwin. (get_unique_id): New method. * fhandler.cc (fhandler_base::close): Call own del_my_locks method. Fix comment. (fhandler_base::fhandler_base): Accommodate new and changed members. (fhandler_base::fixup_after_fork): Call del_my_locks. (fhandler_base::fixup_after_exec): Ditto for files with close-on-exec flag set. * fhandler_disk_file.cc (get_ino_by_handle): Rename from readdir_get_ino_by_handle. Accommodate throughout. (fhandler_base::open_fs): Fill ino with inode number if FS has good inodes. Allocate a LUID and store in unique_id to recognize file descriptors referencing the same file object. * flock.cc: Drop flock TODO comments. Use explicit types __dev32_t and __ino64_t instead of dev_t and ino_t. (LOCK_OBJ_NAME_LEN): Change to reflect longer lf_id length. (get_obj_handle_count): New method. (lockf_t::lf_id): Change type to long long. (inode_t::get_lock_obj_handle_count): Drop in favor of static function get_obj_handle_count. (inode_t::del_locks): Remove. (inode_t::get): Add create_if_missing flag argument. (inode_t::del_my_locks): Reimplement to handle POSIX and BSD flock locks. Return if node can be deleted or not. (inode_t::~inode_t): Ditto. Close handles to i_dir and i_mtx. (fixup_lockf_after_fork): Remove. (fhandler_base::del_my_locks): New method. (fixup_lockf_after_exec): Check if node can be deleted. (inode_t::get): Only create node if create_if_missing is set. Lock the returned node here before unlocking the node list. (inode_t::get_all_locks_list): Accommodate new lf_id length. (inode_t::create_lock_obj): Ditto. (lockf_t::open_lock_obj): Ditto. Change return type to bool. De-const. Set lf_obj instead of returning a handle. (lockf_t::del_lock_obj): Call SetEvent only if new incoming parameters allow it. Explain how it's supposed to work. (fhandler_disk_file::lock): Only fetch file length in SEEK_END case. Use NtQueryInformationFile(FileStandardInformation) instead of calling fstat_by_handle. Always unlock node before returning. Use fhandler's unique id to create lf_id for BSD flock locks. Rely on node lock from inode_t::get. Call del_lock_obj on removed locks here to allow explicit unlocking. Delete node if no lock exists on the file anymore. (lf_setlock): Get file handle as additional parameter. Handle the fact that lf_getblock now always opens the attached event object. Reactivate erroneously applied patch which deactivates setting thread priority. Additionally handle blocking on BSD flock locks. (lf_clearlock): Get file handle as additional parameter. (lf_getlock): Close event handle opened by lf_getblock. (lf_getblock): Open potentially blocking event object here and check its signal state if it's a BSD flock lock. (lf_wakelock): Get file handle as additional parameter. * fork.cc (frok::child): Drop call to fixup_lockf_after_fork. * ntdll.h (struct _EVENT_BASIC_INFORMATION): Define. (enum _EVENT_INFORMATION_CLASS): Define. (NtQueryEvent): Declare. * fhandler.h (fhandler_base::fs_flags): Remove. (fhandler_base::set_fs_flags): Remove. (fhandler_base::get_fs_flags): Remove. * fhandler.cc (fhandler_base::write): Check for sparse file using pc.fs_flags(). * fhandler_disk_file.cc (fhandler_disk_file::ftruncate): Ditto. The return of the volume serial number in fs_info. * fhandler.h (get_dev): New method. * fhandler_disk_file.cc (fhandler_base::fstat_by_handle): Drop call to NtQueryVolumeInformationFile(FileFsVolumeInformation). Just use get_dev() method. * fhandler_fifo.cc (fhandler_fifo::open) Use device ID and inode number to generate fifo name. * path.h (fs_info::sernum): New member. (fs_info::serial_number): New method. (path_conv::fs_serial_number): New method. * path.cc (fs_info::update): Fetch volume serial number and store in sernum.
2008-04-01 02:03:25 +08:00
break;
if (cnt == 0)
{
* smallprint.cc (__small_vswprintf): Fix uninitialized usage of `w'. Revamp advisory file locking to avoid cross reference pointers as well as to allow BSD flock semantics. More agressively delete unused nodes and sync objects. * fhandler.h (fhandler_base::ino): Rename from namehash. Fix comment. (fhandler_base::node): Remove. (fhandler_base::unique_id): Add. (fhandler_base::del_my_locks): New method. (get_ino): Rename from get_namehash. Change usage throughout Cygwin. (get_unique_id): New method. * fhandler.cc (fhandler_base::close): Call own del_my_locks method. Fix comment. (fhandler_base::fhandler_base): Accommodate new and changed members. (fhandler_base::fixup_after_fork): Call del_my_locks. (fhandler_base::fixup_after_exec): Ditto for files with close-on-exec flag set. * fhandler_disk_file.cc (get_ino_by_handle): Rename from readdir_get_ino_by_handle. Accommodate throughout. (fhandler_base::open_fs): Fill ino with inode number if FS has good inodes. Allocate a LUID and store in unique_id to recognize file descriptors referencing the same file object. * flock.cc: Drop flock TODO comments. Use explicit types __dev32_t and __ino64_t instead of dev_t and ino_t. (LOCK_OBJ_NAME_LEN): Change to reflect longer lf_id length. (get_obj_handle_count): New method. (lockf_t::lf_id): Change type to long long. (inode_t::get_lock_obj_handle_count): Drop in favor of static function get_obj_handle_count. (inode_t::del_locks): Remove. (inode_t::get): Add create_if_missing flag argument. (inode_t::del_my_locks): Reimplement to handle POSIX and BSD flock locks. Return if node can be deleted or not. (inode_t::~inode_t): Ditto. Close handles to i_dir and i_mtx. (fixup_lockf_after_fork): Remove. (fhandler_base::del_my_locks): New method. (fixup_lockf_after_exec): Check if node can be deleted. (inode_t::get): Only create node if create_if_missing is set. Lock the returned node here before unlocking the node list. (inode_t::get_all_locks_list): Accommodate new lf_id length. (inode_t::create_lock_obj): Ditto. (lockf_t::open_lock_obj): Ditto. Change return type to bool. De-const. Set lf_obj instead of returning a handle. (lockf_t::del_lock_obj): Call SetEvent only if new incoming parameters allow it. Explain how it's supposed to work. (fhandler_disk_file::lock): Only fetch file length in SEEK_END case. Use NtQueryInformationFile(FileStandardInformation) instead of calling fstat_by_handle. Always unlock node before returning. Use fhandler's unique id to create lf_id for BSD flock locks. Rely on node lock from inode_t::get. Call del_lock_obj on removed locks here to allow explicit unlocking. Delete node if no lock exists on the file anymore. (lf_setlock): Get file handle as additional parameter. Handle the fact that lf_getblock now always opens the attached event object. Reactivate erroneously applied patch which deactivates setting thread priority. Additionally handle blocking on BSD flock locks. (lf_clearlock): Get file handle as additional parameter. (lf_getlock): Close event handle opened by lf_getblock. (lf_getblock): Open potentially blocking event object here and check its signal state if it's a BSD flock lock. (lf_wakelock): Get file handle as additional parameter. * fork.cc (frok::child): Drop call to fixup_lockf_after_fork. * ntdll.h (struct _EVENT_BASIC_INFORMATION): Define. (enum _EVENT_INFORMATION_CLASS): Define. (NtQueryEvent): Declare. * fhandler.h (fhandler_base::fs_flags): Remove. (fhandler_base::set_fs_flags): Remove. (fhandler_base::get_fs_flags): Remove. * fhandler.cc (fhandler_base::write): Check for sparse file using pc.fs_flags(). * fhandler_disk_file.cc (fhandler_disk_file::ftruncate): Ditto. The return of the volume serial number in fs_info. * fhandler.h (get_dev): New method. * fhandler_disk_file.cc (fhandler_base::fstat_by_handle): Drop call to NtQueryVolumeInformationFile(FileFsVolumeInformation). Just use get_dev() method. * fhandler_fifo.cc (fhandler_fifo::open) Use device ID and inode number to generate fifo name. * path.h (fs_info::sernum): New member. (fs_info::serial_number): New method. (path_conv::fs_serial_number): New method. * path.cc (fs_info::update): Fetch volume serial number and store in sernum.
2008-04-01 02:03:25 +08:00
LIST_REMOVE (node, i_next);
delete node;
}
else
{
node->LOCK ();
lockf_t *lock, *n_lock;
lockf_t **prev = &node->i_lockf;
for (lock = *prev; lock && (n_lock = lock->lf_next, 1); lock = n_lock)
* smallprint.cc (__small_vswprintf): Fix uninitialized usage of `w'. Revamp advisory file locking to avoid cross reference pointers as well as to allow BSD flock semantics. More agressively delete unused nodes and sync objects. * fhandler.h (fhandler_base::ino): Rename from namehash. Fix comment. (fhandler_base::node): Remove. (fhandler_base::unique_id): Add. (fhandler_base::del_my_locks): New method. (get_ino): Rename from get_namehash. Change usage throughout Cygwin. (get_unique_id): New method. * fhandler.cc (fhandler_base::close): Call own del_my_locks method. Fix comment. (fhandler_base::fhandler_base): Accommodate new and changed members. (fhandler_base::fixup_after_fork): Call del_my_locks. (fhandler_base::fixup_after_exec): Ditto for files with close-on-exec flag set. * fhandler_disk_file.cc (get_ino_by_handle): Rename from readdir_get_ino_by_handle. Accommodate throughout. (fhandler_base::open_fs): Fill ino with inode number if FS has good inodes. Allocate a LUID and store in unique_id to recognize file descriptors referencing the same file object. * flock.cc: Drop flock TODO comments. Use explicit types __dev32_t and __ino64_t instead of dev_t and ino_t. (LOCK_OBJ_NAME_LEN): Change to reflect longer lf_id length. (get_obj_handle_count): New method. (lockf_t::lf_id): Change type to long long. (inode_t::get_lock_obj_handle_count): Drop in favor of static function get_obj_handle_count. (inode_t::del_locks): Remove. (inode_t::get): Add create_if_missing flag argument. (inode_t::del_my_locks): Reimplement to handle POSIX and BSD flock locks. Return if node can be deleted or not. (inode_t::~inode_t): Ditto. Close handles to i_dir and i_mtx. (fixup_lockf_after_fork): Remove. (fhandler_base::del_my_locks): New method. (fixup_lockf_after_exec): Check if node can be deleted. (inode_t::get): Only create node if create_if_missing is set. Lock the returned node here before unlocking the node list. (inode_t::get_all_locks_list): Accommodate new lf_id length. (inode_t::create_lock_obj): Ditto. (lockf_t::open_lock_obj): Ditto. Change return type to bool. De-const. Set lf_obj instead of returning a handle. (lockf_t::del_lock_obj): Call SetEvent only if new incoming parameters allow it. Explain how it's supposed to work. (fhandler_disk_file::lock): Only fetch file length in SEEK_END case. Use NtQueryInformationFile(FileStandardInformation) instead of calling fstat_by_handle. Always unlock node before returning. Use fhandler's unique id to create lf_id for BSD flock locks. Rely on node lock from inode_t::get. Call del_lock_obj on removed locks here to allow explicit unlocking. Delete node if no lock exists on the file anymore. (lf_setlock): Get file handle as additional parameter. Handle the fact that lf_getblock now always opens the attached event object. Reactivate erroneously applied patch which deactivates setting thread priority. Additionally handle blocking on BSD flock locks. (lf_clearlock): Get file handle as additional parameter. (lf_getlock): Close event handle opened by lf_getblock. (lf_getblock): Open potentially blocking event object here and check its signal state if it's a BSD flock lock. (lf_wakelock): Get file handle as additional parameter. * fork.cc (frok::child): Drop call to fixup_lockf_after_fork. * ntdll.h (struct _EVENT_BASIC_INFORMATION): Define. (enum _EVENT_INFORMATION_CLASS): Define. (NtQueryEvent): Declare. * fhandler.h (fhandler_base::fs_flags): Remove. (fhandler_base::set_fs_flags): Remove. (fhandler_base::get_fs_flags): Remove. * fhandler.cc (fhandler_base::write): Check for sparse file using pc.fs_flags(). * fhandler_disk_file.cc (fhandler_disk_file::ftruncate): Ditto. The return of the volume serial number in fs_info. * fhandler.h (get_dev): New method. * fhandler_disk_file.cc (fhandler_base::fstat_by_handle): Drop call to NtQueryVolumeInformationFile(FileFsVolumeInformation). Just use get_dev() method. * fhandler_fifo.cc (fhandler_fifo::open) Use device ID and inode number to generate fifo name. * path.h (fs_info::sernum): New member. (fs_info::serial_number): New method. (path_conv::fs_serial_number): New method. * path.cc (fs_info::update): Fetch volume serial number and store in sernum.
2008-04-01 02:03:25 +08:00
if (lock->lf_flags & F_POSIX)
{
if (exec)
{
/* The parent called exec. The lock is passed to the child.
Recreate lock object with changed ownership. */
lock->del_lock_obj (NULL);
lock->lf_wid = myself->dwProcessId;
lock->lf_ver = 0;
lock->create_lock_obj ();
}
else
{
/* The parent called spawn. The parent continues to hold
the POSIX lock, ownership is not passed to the child.
Give up the lock in the child. */
*prev = n_lock;
lock->close_lock_obj ();
delete lock;
}
* smallprint.cc (__small_vswprintf): Fix uninitialized usage of `w'. Revamp advisory file locking to avoid cross reference pointers as well as to allow BSD flock semantics. More agressively delete unused nodes and sync objects. * fhandler.h (fhandler_base::ino): Rename from namehash. Fix comment. (fhandler_base::node): Remove. (fhandler_base::unique_id): Add. (fhandler_base::del_my_locks): New method. (get_ino): Rename from get_namehash. Change usage throughout Cygwin. (get_unique_id): New method. * fhandler.cc (fhandler_base::close): Call own del_my_locks method. Fix comment. (fhandler_base::fhandler_base): Accommodate new and changed members. (fhandler_base::fixup_after_fork): Call del_my_locks. (fhandler_base::fixup_after_exec): Ditto for files with close-on-exec flag set. * fhandler_disk_file.cc (get_ino_by_handle): Rename from readdir_get_ino_by_handle. Accommodate throughout. (fhandler_base::open_fs): Fill ino with inode number if FS has good inodes. Allocate a LUID and store in unique_id to recognize file descriptors referencing the same file object. * flock.cc: Drop flock TODO comments. Use explicit types __dev32_t and __ino64_t instead of dev_t and ino_t. (LOCK_OBJ_NAME_LEN): Change to reflect longer lf_id length. (get_obj_handle_count): New method. (lockf_t::lf_id): Change type to long long. (inode_t::get_lock_obj_handle_count): Drop in favor of static function get_obj_handle_count. (inode_t::del_locks): Remove. (inode_t::get): Add create_if_missing flag argument. (inode_t::del_my_locks): Reimplement to handle POSIX and BSD flock locks. Return if node can be deleted or not. (inode_t::~inode_t): Ditto. Close handles to i_dir and i_mtx. (fixup_lockf_after_fork): Remove. (fhandler_base::del_my_locks): New method. (fixup_lockf_after_exec): Check if node can be deleted. (inode_t::get): Only create node if create_if_missing is set. Lock the returned node here before unlocking the node list. (inode_t::get_all_locks_list): Accommodate new lf_id length. (inode_t::create_lock_obj): Ditto. (lockf_t::open_lock_obj): Ditto. Change return type to bool. De-const. Set lf_obj instead of returning a handle. (lockf_t::del_lock_obj): Call SetEvent only if new incoming parameters allow it. Explain how it's supposed to work. (fhandler_disk_file::lock): Only fetch file length in SEEK_END case. Use NtQueryInformationFile(FileStandardInformation) instead of calling fstat_by_handle. Always unlock node before returning. Use fhandler's unique id to create lf_id for BSD flock locks. Rely on node lock from inode_t::get. Call del_lock_obj on removed locks here to allow explicit unlocking. Delete node if no lock exists on the file anymore. (lf_setlock): Get file handle as additional parameter. Handle the fact that lf_getblock now always opens the attached event object. Reactivate erroneously applied patch which deactivates setting thread priority. Additionally handle blocking on BSD flock locks. (lf_clearlock): Get file handle as additional parameter. (lf_getlock): Close event handle opened by lf_getblock. (lf_getblock): Open potentially blocking event object here and check its signal state if it's a BSD flock lock. (lf_wakelock): Get file handle as additional parameter. * fork.cc (frok::child): Drop call to fixup_lockf_after_fork. * ntdll.h (struct _EVENT_BASIC_INFORMATION): Define. (enum _EVENT_INFORMATION_CLASS): Define. (NtQueryEvent): Declare. * fhandler.h (fhandler_base::fs_flags): Remove. (fhandler_base::set_fs_flags): Remove. (fhandler_base::get_fs_flags): Remove. * fhandler.cc (fhandler_base::write): Check for sparse file using pc.fs_flags(). * fhandler_disk_file.cc (fhandler_disk_file::ftruncate): Ditto. The return of the volume serial number in fs_info. * fhandler.h (get_dev): New method. * fhandler_disk_file.cc (fhandler_base::fstat_by_handle): Drop call to NtQueryVolumeInformationFile(FileFsVolumeInformation). Just use get_dev() method. * fhandler_fifo.cc (fhandler_fifo::open) Use device ID and inode number to generate fifo name. * path.h (fs_info::sernum): New member. (fs_info::serial_number): New method. (path_conv::fs_serial_number): New method. * path.cc (fs_info::update): Fetch volume serial number and store in sernum.
2008-04-01 02:03:25 +08:00
}
node->UNLOCK ();
}
}
INODE_LIST_UNLOCK ();
}
/* static method to return a pointer to the inode_t structure for a specific
file. The file is specified by the device and inode_t number. If inode_t
doesn't exist, create it. */
inode_t *
2013-04-23 17:44:36 +08:00
inode_t::get (dev_t dev, ino_t ino, bool create_if_missing, bool lock)
{
inode_t *node;
INODE_LIST_LOCK ();
LIST_FOREACH (node, &cygheap->inode_list, i_next)
if (node->i_dev == dev && node->i_ino == ino)
break;
* smallprint.cc (__small_vswprintf): Fix uninitialized usage of `w'. Revamp advisory file locking to avoid cross reference pointers as well as to allow BSD flock semantics. More agressively delete unused nodes and sync objects. * fhandler.h (fhandler_base::ino): Rename from namehash. Fix comment. (fhandler_base::node): Remove. (fhandler_base::unique_id): Add. (fhandler_base::del_my_locks): New method. (get_ino): Rename from get_namehash. Change usage throughout Cygwin. (get_unique_id): New method. * fhandler.cc (fhandler_base::close): Call own del_my_locks method. Fix comment. (fhandler_base::fhandler_base): Accommodate new and changed members. (fhandler_base::fixup_after_fork): Call del_my_locks. (fhandler_base::fixup_after_exec): Ditto for files with close-on-exec flag set. * fhandler_disk_file.cc (get_ino_by_handle): Rename from readdir_get_ino_by_handle. Accommodate throughout. (fhandler_base::open_fs): Fill ino with inode number if FS has good inodes. Allocate a LUID and store in unique_id to recognize file descriptors referencing the same file object. * flock.cc: Drop flock TODO comments. Use explicit types __dev32_t and __ino64_t instead of dev_t and ino_t. (LOCK_OBJ_NAME_LEN): Change to reflect longer lf_id length. (get_obj_handle_count): New method. (lockf_t::lf_id): Change type to long long. (inode_t::get_lock_obj_handle_count): Drop in favor of static function get_obj_handle_count. (inode_t::del_locks): Remove. (inode_t::get): Add create_if_missing flag argument. (inode_t::del_my_locks): Reimplement to handle POSIX and BSD flock locks. Return if node can be deleted or not. (inode_t::~inode_t): Ditto. Close handles to i_dir and i_mtx. (fixup_lockf_after_fork): Remove. (fhandler_base::del_my_locks): New method. (fixup_lockf_after_exec): Check if node can be deleted. (inode_t::get): Only create node if create_if_missing is set. Lock the returned node here before unlocking the node list. (inode_t::get_all_locks_list): Accommodate new lf_id length. (inode_t::create_lock_obj): Ditto. (lockf_t::open_lock_obj): Ditto. Change return type to bool. De-const. Set lf_obj instead of returning a handle. (lockf_t::del_lock_obj): Call SetEvent only if new incoming parameters allow it. Explain how it's supposed to work. (fhandler_disk_file::lock): Only fetch file length in SEEK_END case. Use NtQueryInformationFile(FileStandardInformation) instead of calling fstat_by_handle. Always unlock node before returning. Use fhandler's unique id to create lf_id for BSD flock locks. Rely on node lock from inode_t::get. Call del_lock_obj on removed locks here to allow explicit unlocking. Delete node if no lock exists on the file anymore. (lf_setlock): Get file handle as additional parameter. Handle the fact that lf_getblock now always opens the attached event object. Reactivate erroneously applied patch which deactivates setting thread priority. Additionally handle blocking on BSD flock locks. (lf_clearlock): Get file handle as additional parameter. (lf_getlock): Close event handle opened by lf_getblock. (lf_getblock): Open potentially blocking event object here and check its signal state if it's a BSD flock lock. (lf_wakelock): Get file handle as additional parameter. * fork.cc (frok::child): Drop call to fixup_lockf_after_fork. * ntdll.h (struct _EVENT_BASIC_INFORMATION): Define. (enum _EVENT_INFORMATION_CLASS): Define. (NtQueryEvent): Declare. * fhandler.h (fhandler_base::fs_flags): Remove. (fhandler_base::set_fs_flags): Remove. (fhandler_base::get_fs_flags): Remove. * fhandler.cc (fhandler_base::write): Check for sparse file using pc.fs_flags(). * fhandler_disk_file.cc (fhandler_disk_file::ftruncate): Ditto. The return of the volume serial number in fs_info. * fhandler.h (get_dev): New method. * fhandler_disk_file.cc (fhandler_base::fstat_by_handle): Drop call to NtQueryVolumeInformationFile(FileFsVolumeInformation). Just use get_dev() method. * fhandler_fifo.cc (fhandler_fifo::open) Use device ID and inode number to generate fifo name. * path.h (fs_info::sernum): New member. (fs_info::serial_number): New method. (path_conv::fs_serial_number): New method. * path.cc (fs_info::update): Fetch volume serial number and store in sernum.
2008-04-01 02:03:25 +08:00
if (!node && create_if_missing)
{
node = new inode_t (dev, ino);
if (node)
LIST_INSERT_HEAD (&cygheap->inode_list, node, i_next);
}
* smallprint.cc (__small_vswprintf): Fix uninitialized usage of `w'. Revamp advisory file locking to avoid cross reference pointers as well as to allow BSD flock semantics. More agressively delete unused nodes and sync objects. * fhandler.h (fhandler_base::ino): Rename from namehash. Fix comment. (fhandler_base::node): Remove. (fhandler_base::unique_id): Add. (fhandler_base::del_my_locks): New method. (get_ino): Rename from get_namehash. Change usage throughout Cygwin. (get_unique_id): New method. * fhandler.cc (fhandler_base::close): Call own del_my_locks method. Fix comment. (fhandler_base::fhandler_base): Accommodate new and changed members. (fhandler_base::fixup_after_fork): Call del_my_locks. (fhandler_base::fixup_after_exec): Ditto for files with close-on-exec flag set. * fhandler_disk_file.cc (get_ino_by_handle): Rename from readdir_get_ino_by_handle. Accommodate throughout. (fhandler_base::open_fs): Fill ino with inode number if FS has good inodes. Allocate a LUID and store in unique_id to recognize file descriptors referencing the same file object. * flock.cc: Drop flock TODO comments. Use explicit types __dev32_t and __ino64_t instead of dev_t and ino_t. (LOCK_OBJ_NAME_LEN): Change to reflect longer lf_id length. (get_obj_handle_count): New method. (lockf_t::lf_id): Change type to long long. (inode_t::get_lock_obj_handle_count): Drop in favor of static function get_obj_handle_count. (inode_t::del_locks): Remove. (inode_t::get): Add create_if_missing flag argument. (inode_t::del_my_locks): Reimplement to handle POSIX and BSD flock locks. Return if node can be deleted or not. (inode_t::~inode_t): Ditto. Close handles to i_dir and i_mtx. (fixup_lockf_after_fork): Remove. (fhandler_base::del_my_locks): New method. (fixup_lockf_after_exec): Check if node can be deleted. (inode_t::get): Only create node if create_if_missing is set. Lock the returned node here before unlocking the node list. (inode_t::get_all_locks_list): Accommodate new lf_id length. (inode_t::create_lock_obj): Ditto. (lockf_t::open_lock_obj): Ditto. Change return type to bool. De-const. Set lf_obj instead of returning a handle. (lockf_t::del_lock_obj): Call SetEvent only if new incoming parameters allow it. Explain how it's supposed to work. (fhandler_disk_file::lock): Only fetch file length in SEEK_END case. Use NtQueryInformationFile(FileStandardInformation) instead of calling fstat_by_handle. Always unlock node before returning. Use fhandler's unique id to create lf_id for BSD flock locks. Rely on node lock from inode_t::get. Call del_lock_obj on removed locks here to allow explicit unlocking. Delete node if no lock exists on the file anymore. (lf_setlock): Get file handle as additional parameter. Handle the fact that lf_getblock now always opens the attached event object. Reactivate erroneously applied patch which deactivates setting thread priority. Additionally handle blocking on BSD flock locks. (lf_clearlock): Get file handle as additional parameter. (lf_getlock): Close event handle opened by lf_getblock. (lf_getblock): Open potentially blocking event object here and check its signal state if it's a BSD flock lock. (lf_wakelock): Get file handle as additional parameter. * fork.cc (frok::child): Drop call to fixup_lockf_after_fork. * ntdll.h (struct _EVENT_BASIC_INFORMATION): Define. (enum _EVENT_INFORMATION_CLASS): Define. (NtQueryEvent): Declare. * fhandler.h (fhandler_base::fs_flags): Remove. (fhandler_base::set_fs_flags): Remove. (fhandler_base::get_fs_flags): Remove. * fhandler.cc (fhandler_base::write): Check for sparse file using pc.fs_flags(). * fhandler_disk_file.cc (fhandler_disk_file::ftruncate): Ditto. The return of the volume serial number in fs_info. * fhandler.h (get_dev): New method. * fhandler_disk_file.cc (fhandler_base::fstat_by_handle): Drop call to NtQueryVolumeInformationFile(FileFsVolumeInformation). Just use get_dev() method. * fhandler_fifo.cc (fhandler_fifo::open) Use device ID and inode number to generate fifo name. * path.h (fs_info::sernum): New member. (fs_info::serial_number): New method. (path_conv::fs_serial_number): New method. * path.cc (fs_info::update): Fetch volume serial number and store in sernum.
2008-04-01 02:03:25 +08:00
if (node)
* flock.cc (LOCK_OBJ_NAME_LEN): Change to accommodate extra lf_ver field. (class lockf_t): Add lf_ver field. (lockf_t::lockf_t): Initialize lf_ver to 0. (class inode_t): Change i_wait to i_cnt. Change comment to explain change in usage. (inode_t:use): Rename from wait. Make private. (inode_t::unuse): Rename from unwait. Make private. (inode_t::inuse): Rename from waiting. Make private. (inode_t::notused): New public method to set use count to 0. (inode_t::unlock_and_remove): New method to unlock node and to delete it if it's unused in current process. (fhandler_base::del_my_locks): Drop global list lock. Drop variable no_locks_left. Simpify unlocking and removing node by just calling unlock_and_remove. (fixup_lockf_after_exec): Call notused method for each node. (inode_t::get): Call use method. Lock node only if outside of list lock. (inode_t::get_all_locks_list): Accommodate additional lf_ver field when creating lockf_t structure from object name. (lockf_t::create_lock_obj_attr): Accommodate additional lf_ver field when creating object name from lockf_t structure. Handle STATUS_OBJECT_NAME_COLLISION gracefully in F_POSIX case as well. Change comment accordingly. Increment lf_ver field rather than high byte of lf_wid field. Simplify comment. (fhandler_disk_file::lock): Always call unlock_and_remove rather than just UNLOCK on node. (lf_setlock): Move ret definition where it's used. Drop unneeded tests for obj being not NULL. Only check for deadlock condition if the lock we're trying to establish is a POSIX lock. Revamp object collecting and wait code to cover all cases. Don't return with EDEADLK if blocking process can't be opened for synchronization in F_POSIX case, rather just wait like in F_FLOCK case. Change system_printf to debug_printf in that case. Only run WaitForMultipleObjects with high priority. Close obj and process handles prior to locking node.
2011-08-29 21:50:25 +08:00
node->use ();
INODE_LIST_UNLOCK ();
if (node && lock)
* flock.cc (LOCK_OBJ_NAME_LEN): Change to accommodate extra lf_ver field. (class lockf_t): Add lf_ver field. (lockf_t::lockf_t): Initialize lf_ver to 0. (class inode_t): Change i_wait to i_cnt. Change comment to explain change in usage. (inode_t:use): Rename from wait. Make private. (inode_t::unuse): Rename from unwait. Make private. (inode_t::inuse): Rename from waiting. Make private. (inode_t::notused): New public method to set use count to 0. (inode_t::unlock_and_remove): New method to unlock node and to delete it if it's unused in current process. (fhandler_base::del_my_locks): Drop global list lock. Drop variable no_locks_left. Simpify unlocking and removing node by just calling unlock_and_remove. (fixup_lockf_after_exec): Call notused method for each node. (inode_t::get): Call use method. Lock node only if outside of list lock. (inode_t::get_all_locks_list): Accommodate additional lf_ver field when creating lockf_t structure from object name. (lockf_t::create_lock_obj_attr): Accommodate additional lf_ver field when creating object name from lockf_t structure. Handle STATUS_OBJECT_NAME_COLLISION gracefully in F_POSIX case as well. Change comment accordingly. Increment lf_ver field rather than high byte of lf_wid field. Simplify comment. (fhandler_disk_file::lock): Always call unlock_and_remove rather than just UNLOCK on node. (lf_setlock): Move ret definition where it's used. Drop unneeded tests for obj being not NULL. Only check for deadlock condition if the lock we're trying to establish is a POSIX lock. Revamp object collecting and wait code to cover all cases. Don't return with EDEADLK if blocking process can't be opened for synchronization in F_POSIX case, rather just wait like in F_FLOCK case. Change system_printf to debug_printf in that case. Only run WaitForMultipleObjects with high priority. Close obj and process handles prior to locking node.
2011-08-29 21:50:25 +08:00
node->LOCK ();
return node;
}
2013-04-23 17:44:36 +08:00
inode_t::inode_t (dev_t dev, ino_t ino)
* flock.cc (LOCK_OBJ_NAME_LEN): Change to accommodate extra lf_ver field. (class lockf_t): Add lf_ver field. (lockf_t::lockf_t): Initialize lf_ver to 0. (class inode_t): Change i_wait to i_cnt. Change comment to explain change in usage. (inode_t:use): Rename from wait. Make private. (inode_t::unuse): Rename from unwait. Make private. (inode_t::inuse): Rename from waiting. Make private. (inode_t::notused): New public method to set use count to 0. (inode_t::unlock_and_remove): New method to unlock node and to delete it if it's unused in current process. (fhandler_base::del_my_locks): Drop global list lock. Drop variable no_locks_left. Simpify unlocking and removing node by just calling unlock_and_remove. (fixup_lockf_after_exec): Call notused method for each node. (inode_t::get): Call use method. Lock node only if outside of list lock. (inode_t::get_all_locks_list): Accommodate additional lf_ver field when creating lockf_t structure from object name. (lockf_t::create_lock_obj_attr): Accommodate additional lf_ver field when creating object name from lockf_t structure. Handle STATUS_OBJECT_NAME_COLLISION gracefully in F_POSIX case as well. Change comment accordingly. Increment lf_ver field rather than high byte of lf_wid field. Simplify comment. (fhandler_disk_file::lock): Always call unlock_and_remove rather than just UNLOCK on node. (lf_setlock): Move ret definition where it's used. Drop unneeded tests for obj being not NULL. Only check for deadlock condition if the lock we're trying to establish is a POSIX lock. Revamp object collecting and wait code to cover all cases. Don't return with EDEADLK if blocking process can't be opened for synchronization in F_POSIX case, rather just wait like in F_FLOCK case. Change system_printf to debug_printf in that case. Only run WaitForMultipleObjects with high priority. Close obj and process handles prior to locking node.
2011-08-29 21:50:25 +08:00
: i_lockf (NULL), i_all_lf (NULL), i_dev (dev), i_ino (ino), i_cnt (0L)
{
HANDLE parent_dir;
* fhandler.h (-struct wsa_event): Move to wsa_event.h. Include wsa_event.h instead. * fhandler_socket.cc (NUM_SOCKS): Move to wsa_event.h. (wsa_events): Move from DLL shared area to cygwin_shared shared memory. Accommodate throughout. (socket_serial_number): Ditto. * fhandler_tape.cc (mt): Ditto. (mtinfo_init): Remove. (mt): Define as cygwin_shared->mt. * flock.cc (FLOCK_PARENT_DIR_ACCESS): Remove. (FLOCK_INODE_DIR_ACCESS): Move up in file. (FLOCK_MUTANT_ACCESS): Ditto. (FLOCK_EVENT_ACCESS): Ditto. (get_lock_parent_dir): Remove. (inode_t::inode_t): Call get_shared_parent_dir to get parent dir handle. Add a "flock-" prefix to file's lock directory name for clarity. * mtinfo.h (mtinfo_init): Drop declaration. * net.cc (last_used_bindresvport): Move from DLL shared area to cygwin_shared shared memory. (cygwin_bindresvport_sa): Accommodate above change. * sec_helper.cc (_everyone_sd): Move here from flock.cc. * security.h (SD_MIN_SIZE): Ditto. (everyone_sd): Ditto. * shared.cc (cygwin_shared_area): Remove. (cygwin_shared_h): New handle. (get_shared_parent_dir): New static function. (shared_name): Drop session_local argument. Call get_shared_parent_dir here. Add cygwin-shared subdir to object name. (offsets): Reinstantiate SH_CYGWIN_SHARED member. (open_shared): Revert change from 2007-03-29 for systems supporting SeCreateGlobalPrivilege. (shared_info::initialize): Call mtinfo's initialize here. (memory_init): Drop call to mtinfo_init. * shared_info.h (SHARED_INFO_CB): Accommodate change to shared_info. (CURR_SHARED_MAGIC): Ditto. (class shared_info): Add members for global socket and tape info sharing. (enum shared_locations): Reinstantiate SH_CYGWIN_SHARED. (get_shared_parent_dir): Declare. (shared_name): Drop session_local argument from declaration. * wsa_event.h: New file. Move definitions of NUM_SOCKS and struct wsa_event here.
2008-04-19 04:13:37 +08:00
WCHAR name[48];
UNICODE_STRING uname;
OBJECT_ATTRIBUTES attr;
NTSTATUS status;
* fhandler.h (-struct wsa_event): Move to wsa_event.h. Include wsa_event.h instead. * fhandler_socket.cc (NUM_SOCKS): Move to wsa_event.h. (wsa_events): Move from DLL shared area to cygwin_shared shared memory. Accommodate throughout. (socket_serial_number): Ditto. * fhandler_tape.cc (mt): Ditto. (mtinfo_init): Remove. (mt): Define as cygwin_shared->mt. * flock.cc (FLOCK_PARENT_DIR_ACCESS): Remove. (FLOCK_INODE_DIR_ACCESS): Move up in file. (FLOCK_MUTANT_ACCESS): Ditto. (FLOCK_EVENT_ACCESS): Ditto. (get_lock_parent_dir): Remove. (inode_t::inode_t): Call get_shared_parent_dir to get parent dir handle. Add a "flock-" prefix to file's lock directory name for clarity. * mtinfo.h (mtinfo_init): Drop declaration. * net.cc (last_used_bindresvport): Move from DLL shared area to cygwin_shared shared memory. (cygwin_bindresvport_sa): Accommodate above change. * sec_helper.cc (_everyone_sd): Move here from flock.cc. * security.h (SD_MIN_SIZE): Ditto. (everyone_sd): Ditto. * shared.cc (cygwin_shared_area): Remove. (cygwin_shared_h): New handle. (get_shared_parent_dir): New static function. (shared_name): Drop session_local argument. Call get_shared_parent_dir here. Add cygwin-shared subdir to object name. (offsets): Reinstantiate SH_CYGWIN_SHARED member. (open_shared): Revert change from 2007-03-29 for systems supporting SeCreateGlobalPrivilege. (shared_info::initialize): Call mtinfo's initialize here. (memory_init): Drop call to mtinfo_init. * shared_info.h (SHARED_INFO_CB): Accommodate change to shared_info. (CURR_SHARED_MAGIC): Ditto. (class shared_info): Add members for global socket and tape info sharing. (enum shared_locations): Reinstantiate SH_CYGWIN_SHARED. (get_shared_parent_dir): Declare. (shared_name): Drop session_local argument from declaration. * wsa_event.h: New file. Move definitions of NUM_SOCKS and struct wsa_event here.
2008-04-19 04:13:37 +08:00
parent_dir = get_shared_parent_dir ();
/* Create a subdir which is named after the device and inode_t numbers
of the given file, in hex notation. */
int len = __small_swprintf (name, LOCK_DIR_NAME_FMT, dev, ino);
RtlInitCountedUnicodeString (&uname, name, len * sizeof (WCHAR));
InitializeObjectAttributes (&attr, &uname, OBJ_INHERIT | OBJ_OPENIF,
parent_dir, everyone_sd (FLOCK_INODE_DIR_ACCESS));
status = NtCreateDirectoryObject (&i_dir, FLOCK_INODE_DIR_ACCESS, &attr);
if (!NT_SUCCESS (status))
2013-04-23 17:44:36 +08:00
api_fatal ("NtCreateDirectoryObject(inode): %y", status);
/* Create a mutex object in the file specific dir, which is used for
access synchronization on the dir and its objects. */
InitializeObjectAttributes (&attr, &ro_u_mtx, OBJ_INHERIT | OBJ_OPENIF, i_dir,
* Makefile.in (DLL_OFILES): Add kernel32.o. * autoload.cc (WSACloseEvent): Remove. (WSACreateEvent): Remove. * cygheap.cc (cygheap_init): Drop initializing shared_prefix. * cygheap.h (struct init_cygheap): Drop shared_prefix and shared_prefix_buf members. * fhandler_socket.cc (sock_shared_name): New static function. (search_wsa_event_slot): Convert name buffers to WCHAR. Call NtCreateMutant/NtOpenMutant to create mutexes in session local namespace. (fhandler_socket::init_events): Ditto. Fix debug output. (fhandler_socket::release_events): Close mutexes using NtClose. (fhandler_socket::dup): Ditto. * kernel32.cc: New file, implementing Win32 calls in a Cygwin-specific way. * mmap.cc (MapView): Make static. * ntdll.h: Fix status code sorting. (STATUS_OBJECT_NAME_EXISTS): Define. (SEMAPHORE_QUERY_STATE): Define. (CYG_SHARED_DIR_ACCESS): Define. (CYG_MUTANT_ACCESS): Define. (CYG_EVENT_ACCESS): Define. (CYG_SEMAPHORE_ACCESS): Define. (enum _PROCESSINFOCLASS): Define ProcessSessionInformation. (struct _PROCESS_SESSION_INFORMATION): Define. (NtCreateSemaphore): Declare. (NtOpenSemaphore): Declare. * flock.cc: Use CYG_xxx_ACCESS access masks where appropriate. * posix_ipc.cc (ipc_mutex_init): Use native functions to create mutex. Create in cygwin-shared subdir. (ipc_cond_init): Ditto for event. (ipc_mutex_close): Use NtClose. (ipc_cond_close): Ditto. (mq_open): Drop "cyg" prefix from mqh_uname. * shared.cc (CYG_SHARED_DIR_ACCESS): Drop definition here. (_cygwin_testing): Declare extern on file level. (get_shared_parent_dir): Change name of shared directory. Add name to api_fatal output. (get_session_parent_dir): New function. (shared_name): Simplify. (shared_info::initialize): Call get_session_parent_dir. * shared_info.h (get_session_parent_dir): Declare. * smallprint.cc (__small_vswprintf): Fix bug in multibyte string conversion. * thread.cc (semaphore::semaphore): Align semaphore name to object names in posix IPC functions. * include/cygwin/version.h (CYGWIN_VERSION_SHARED_DATA): Bump.
2008-04-21 20:46:58 +08:00
everyone_sd (CYG_MUTANT_ACCESS));
status = NtCreateMutant (&i_mtx, CYG_MUTANT_ACCESS, &attr, FALSE);
if (!NT_SUCCESS (status))
2013-04-23 17:44:36 +08:00
api_fatal ("NtCreateMutant(inode): %y", status);
}
/* Enumerate all lock event objects for this file and create a lockf_t
list in the i_all_lf member. This list is searched in lf_getblock
for locks which potentially block our lock request. */
/* Number of lockf_t structs which fit in the temporary buffer. */
#define MAX_LOCKF_CNT ((intptr_t)((NT_MAX_PATH * sizeof (WCHAR)) \
/ sizeof (lockf_t)))
bool
lockf_t::from_obj_name (inode_t *node, lockf_t **head, const wchar_t *name)
{
wchar_t *endptr;
/* "%02x-%01x-%016X-%016X-%016X-%08x-%04x",
lf_flags, lf_type, lf_start, lf_end, lf_id, lf_wid, lf_ver */
lf_flags = wcstol (name, &endptr, 16);
if ((lf_flags & ~(F_FLOCK | F_POSIX)) != 0
|| ((lf_flags & (F_FLOCK | F_POSIX)) == (F_FLOCK | F_POSIX)))
return false;
lf_type = wcstol (endptr + 1, &endptr, 16);
if ((lf_type != F_RDLCK && lf_type != F_WRLCK) || !endptr || *endptr != L'-')
return false;
2013-04-23 17:44:36 +08:00
lf_start = (off_t) wcstoull (endptr + 1, &endptr, 16);
if (lf_start < 0 || !endptr || *endptr != L'-')
return false;
2013-04-23 17:44:36 +08:00
lf_end = (off_t) wcstoull (endptr + 1, &endptr, 16);
if (lf_end < -1LL
|| (lf_end > 0 && lf_end < lf_start)
|| !endptr || *endptr != L'-')
return false;
lf_id = wcstoll (endptr + 1, &endptr, 16);
if (!endptr || *endptr != L'-'
|| ((lf_flags & F_POSIX) && (lf_id < 1 || lf_id > UINT32_MAX)))
return false;
lf_wid = wcstoul (endptr + 1, &endptr, 16);
if (!endptr || *endptr != L'-')
return false;
lf_ver = wcstoul (endptr + 1, &endptr, 16);
if (endptr && *endptr != L'\0')
return false;
lf_head = head;
lf_inode = node;
lf_next = NULL;
lf_obj = NULL;
return true;
}
lockf_t *
inode_t::get_all_locks_list ()
{
struct fdbi
{
DIRECTORY_BASIC_INFORMATION dbi;
WCHAR buf[2][NAME_MAX + 1];
} f;
ULONG context;
NTSTATUS status;
lockf_t newlock, *lock = i_all_lf;
for (BOOLEAN restart = TRUE;
NT_SUCCESS (status = NtQueryDirectoryObject (i_dir, &f, sizeof f, TRUE,
restart, &context, NULL));
restart = FALSE)
{
if (f.dbi.ObjectName.Length != LOCK_OBJ_NAME_LEN * sizeof (WCHAR))
continue;
f.dbi.ObjectName.Buffer[LOCK_OBJ_NAME_LEN] = L'\0';
if (!newlock.from_obj_name (this, &i_all_lf, f.dbi.ObjectName.Buffer))
continue;
if (lock - i_all_lf >= MAX_LOCKF_CNT)
{
system_printf ("Warning, can't handle more than %d locks per file.",
MAX_LOCKF_CNT);
break;
}
if (lock > i_all_lf)
lock[-1].lf_next = lock;
new (lock++) lockf_t (newlock);
}
/* If no lock has been found, return NULL. */
if (lock == i_all_lf)
return NULL;
return i_all_lf;
}
/* Create the lock object name. The name is constructed from the lock
properties which identify it uniquely, all values in hex. */
POBJECT_ATTRIBUTES
lockf_t::create_lock_obj_attr (lockfattr_t *attr, ULONG flags, void *sd_buf)
{
__small_swprintf (attr->name, LOCK_OBJ_NAME_FMT,
lf_flags & (F_POSIX | F_FLOCK), lf_type, lf_start, lf_end,
* flock.cc (LOCK_OBJ_NAME_LEN): Change to accommodate extra lf_ver field. (class lockf_t): Add lf_ver field. (lockf_t::lockf_t): Initialize lf_ver to 0. (class inode_t): Change i_wait to i_cnt. Change comment to explain change in usage. (inode_t:use): Rename from wait. Make private. (inode_t::unuse): Rename from unwait. Make private. (inode_t::inuse): Rename from waiting. Make private. (inode_t::notused): New public method to set use count to 0. (inode_t::unlock_and_remove): New method to unlock node and to delete it if it's unused in current process. (fhandler_base::del_my_locks): Drop global list lock. Drop variable no_locks_left. Simpify unlocking and removing node by just calling unlock_and_remove. (fixup_lockf_after_exec): Call notused method for each node. (inode_t::get): Call use method. Lock node only if outside of list lock. (inode_t::get_all_locks_list): Accommodate additional lf_ver field when creating lockf_t structure from object name. (lockf_t::create_lock_obj_attr): Accommodate additional lf_ver field when creating object name from lockf_t structure. Handle STATUS_OBJECT_NAME_COLLISION gracefully in F_POSIX case as well. Change comment accordingly. Increment lf_ver field rather than high byte of lf_wid field. Simplify comment. (fhandler_disk_file::lock): Always call unlock_and_remove rather than just UNLOCK on node. (lf_setlock): Move ret definition where it's used. Drop unneeded tests for obj being not NULL. Only check for deadlock condition if the lock we're trying to establish is a POSIX lock. Revamp object collecting and wait code to cover all cases. Don't return with EDEADLK if blocking process can't be opened for synchronization in F_POSIX case, rather just wait like in F_FLOCK case. Change system_printf to debug_printf in that case. Only run WaitForMultipleObjects with high priority. Close obj and process handles prior to locking node.
2011-08-29 21:50:25 +08:00
lf_id, lf_wid, lf_ver);
RtlInitCountedUnicodeString (&attr->uname, attr->name,
LOCK_OBJ_NAME_LEN * sizeof (WCHAR));
InitializeObjectAttributes (&attr->attr, &attr->uname, flags, lf_inode->i_dir,
_everyone_sd (sd_buf, FLOCK_EVENT_ACCESS));
return &attr->attr;
}
DWORD WINAPI
create_lock_in_parent (PVOID param)
{
HANDLE lf_obj;
ULONG size;
OBJECT_NAME_INFORMATION *ntfn;
NTSTATUS status;
wchar_t *lockname, *inodename, *endptr;
2013-04-23 17:44:36 +08:00
dev_t dev;
ino_t ino;
inode_t *node;
lockf_t newlock, *lock;
int cnt;
/* param is the handle to the lock object, created by caller. */
lf_obj = (HANDLE) param;
/* Fetch object path from handle. Typically the length of the path
is 146 characters, starting with
"\BaseNamedObject\cygwin-1S5-<16-hex-digits>\..." */
size = sizeof (OBJECT_NAME_INFORMATION) + 256 * sizeof (WCHAR);
ntfn = (OBJECT_NAME_INFORMATION *) alloca (size);
memset (ntfn, 0, size);
status = NtQueryObject (lf_obj, ObjectNameInformation, ntfn, size, &size);
if (!NT_SUCCESS (status))
goto err;
ntfn->Name.Buffer[ntfn->Name.Length / sizeof (WCHAR)] = L'\0';
/* Sanity check so that we don't peek into unchartered territory. */
if (ntfn->Name.Length < LOCK_OBJ_NAME_LEN + LOCK_DIR_NAME_LEN + 1)
goto err;
/* The names have fixed size, so we know where the substrings start. */
lockname = ntfn->Name.Buffer + ntfn->Name.Length / sizeof (WCHAR)
- LOCK_OBJ_NAME_LEN;
inodename = lockname - LOCK_DIR_NAME_LEN - 1;
dev = wcstoul (inodename + LOCK_DIR_NAME_DEV_OFF, &endptr, 16);
if (*endptr != L'-')
goto err;
ino = wcstoull (inodename + LOCK_DIR_NAME_INO_OFF, &endptr, 16);
if (*endptr != L'\\')
goto err;
if (!newlock.from_obj_name (NULL, NULL, lockname))
goto err;
/* Check if we have an open file handle with the same unique id. */
{
cnt = 0;
cygheap_fdenum cfd (true);
while (cfd.next () >= 0)
if (cfd->get_unique_id () == newlock.lf_id && ++cnt > 0)
break;
}
/* If not, close handle and return. */
if (!cnt)
{
NtClose (lf_obj);
return 0;
}
/* The handle gets created non-inheritable. That's fine, unless the parent
starts another process accessing this object. So, after it's clear we
have to store the handle for further use, make sure it gets inheritable
by child processes. */
if (!SetHandleInformation (lf_obj, HANDLE_FLAG_INHERIT, HANDLE_FLAG_INHERIT))
goto err;
/* otherwise generate inode from directory name... */
node = inode_t::get (dev, ino, true, false);
/* ...and generate lock from object name. */
lock = new lockf_t (newlock);
lock->lf_inode = node;
lock->lf_head = &node->i_lockf;
lock->lf_next = node->i_lockf;
lock->lf_obj = lf_obj;
node->i_lockf = lock;
node->unuse ();
return 0;
err:
system_printf ("Adding <%S> lock failed", &ntfn->Name);
NtClose (lf_obj);
return 1;
}
DWORD WINAPI
delete_lock_in_parent (PVOID param)
{
inode_t *node, *next_node;
lockf_t *lock, **prev;
/* Scan list of all inodes, and reap stale BSD lock if lf_id matches.
Remove inode if empty. */
INODE_LIST_LOCK ();
LIST_FOREACH_SAFE (node, &cygheap->inode_list, i_next, next_node)
if (!node->inuse ())
{
for (prev = &node->i_lockf, lock = *prev; lock; lock = *prev)
{
if ((lock->lf_flags & F_FLOCK) && IsEventSignalled (lock->lf_obj))
{
*prev = lock->lf_next;
delete lock;
}
else
prev = &lock->lf_next;
}
if (node->i_lockf == NULL)
{
LIST_REMOVE (node, i_next);
delete node;
}
}
INODE_LIST_UNLOCK ();
return 0;
}
/* Create the lock event object in the file's subdir in the NT global
namespace. */
void
lockf_t::create_lock_obj ()
{
lockfattr_t attr;
NTSTATUS status;
PSECURITY_DESCRIPTOR sd_buf = alloca (SD_MIN_SIZE);
POBJECT_ATTRIBUTES lock_obj_attr;
do
{
lock_obj_attr = create_lock_obj_attr (&attr, OBJ_INHERIT, sd_buf);
status = NtCreateEvent (&lf_obj, CYG_EVENT_ACCESS, lock_obj_attr,
NotificationEvent, FALSE);
if (!NT_SUCCESS (status))
{
* flock.cc (LOCK_OBJ_NAME_LEN): Change to accommodate extra lf_ver field. (class lockf_t): Add lf_ver field. (lockf_t::lockf_t): Initialize lf_ver to 0. (class inode_t): Change i_wait to i_cnt. Change comment to explain change in usage. (inode_t:use): Rename from wait. Make private. (inode_t::unuse): Rename from unwait. Make private. (inode_t::inuse): Rename from waiting. Make private. (inode_t::notused): New public method to set use count to 0. (inode_t::unlock_and_remove): New method to unlock node and to delete it if it's unused in current process. (fhandler_base::del_my_locks): Drop global list lock. Drop variable no_locks_left. Simpify unlocking and removing node by just calling unlock_and_remove. (fixup_lockf_after_exec): Call notused method for each node. (inode_t::get): Call use method. Lock node only if outside of list lock. (inode_t::get_all_locks_list): Accommodate additional lf_ver field when creating lockf_t structure from object name. (lockf_t::create_lock_obj_attr): Accommodate additional lf_ver field when creating object name from lockf_t structure. Handle STATUS_OBJECT_NAME_COLLISION gracefully in F_POSIX case as well. Change comment accordingly. Increment lf_ver field rather than high byte of lf_wid field. Simplify comment. (fhandler_disk_file::lock): Always call unlock_and_remove rather than just UNLOCK on node. (lf_setlock): Move ret definition where it's used. Drop unneeded tests for obj being not NULL. Only check for deadlock condition if the lock we're trying to establish is a POSIX lock. Revamp object collecting and wait code to cover all cases. Don't return with EDEADLK if blocking process can't be opened for synchronization in F_POSIX case, rather just wait like in F_FLOCK case. Change system_printf to debug_printf in that case. Only run WaitForMultipleObjects with high priority. Close obj and process handles prior to locking node.
2011-08-29 21:50:25 +08:00
if (status != STATUS_OBJECT_NAME_COLLISION)
2013-04-23 17:44:36 +08:00
api_fatal ("NtCreateEvent(lock): %y", status);
* flock.cc (LOCK_OBJ_NAME_LEN): Change to accommodate extra lf_ver field. (class lockf_t): Add lf_ver field. (lockf_t::lockf_t): Initialize lf_ver to 0. (class inode_t): Change i_wait to i_cnt. Change comment to explain change in usage. (inode_t:use): Rename from wait. Make private. (inode_t::unuse): Rename from unwait. Make private. (inode_t::inuse): Rename from waiting. Make private. (inode_t::notused): New public method to set use count to 0. (inode_t::unlock_and_remove): New method to unlock node and to delete it if it's unused in current process. (fhandler_base::del_my_locks): Drop global list lock. Drop variable no_locks_left. Simpify unlocking and removing node by just calling unlock_and_remove. (fixup_lockf_after_exec): Call notused method for each node. (inode_t::get): Call use method. Lock node only if outside of list lock. (inode_t::get_all_locks_list): Accommodate additional lf_ver field when creating lockf_t structure from object name. (lockf_t::create_lock_obj_attr): Accommodate additional lf_ver field when creating object name from lockf_t structure. Handle STATUS_OBJECT_NAME_COLLISION gracefully in F_POSIX case as well. Change comment accordingly. Increment lf_ver field rather than high byte of lf_wid field. Simplify comment. (fhandler_disk_file::lock): Always call unlock_and_remove rather than just UNLOCK on node. (lf_setlock): Move ret definition where it's used. Drop unneeded tests for obj being not NULL. Only check for deadlock condition if the lock we're trying to establish is a POSIX lock. Revamp object collecting and wait code to cover all cases. Don't return with EDEADLK if blocking process can't be opened for synchronization in F_POSIX case, rather just wait like in F_FLOCK case. Change system_printf to debug_printf in that case. Only run WaitForMultipleObjects with high priority. Close obj and process handles prior to locking node.
2011-08-29 21:50:25 +08:00
/* If we get a STATUS_OBJECT_NAME_COLLISION, the event still exists
because some other process is waiting for it in lf_setlock.
If so, check the event's signal state. If we can't open it, it
has been closed in the meantime, so just try again. If we can
open it and the object is not signalled, it's surely a bug in the
code somewhere. Otherwise, close the event and retry to create
a new event with another name. */
if (open_lock_obj ())
{
if (!IsEventSignalled (lf_obj))
2013-04-23 17:44:36 +08:00
api_fatal ("NtCreateEvent(lock): %y", status);
close_lock_obj ();
* flock.cc (LOCK_OBJ_NAME_LEN): Change to accommodate extra lf_ver field. (class lockf_t): Add lf_ver field. (lockf_t::lockf_t): Initialize lf_ver to 0. (class inode_t): Change i_wait to i_cnt. Change comment to explain change in usage. (inode_t:use): Rename from wait. Make private. (inode_t::unuse): Rename from unwait. Make private. (inode_t::inuse): Rename from waiting. Make private. (inode_t::notused): New public method to set use count to 0. (inode_t::unlock_and_remove): New method to unlock node and to delete it if it's unused in current process. (fhandler_base::del_my_locks): Drop global list lock. Drop variable no_locks_left. Simpify unlocking and removing node by just calling unlock_and_remove. (fixup_lockf_after_exec): Call notused method for each node. (inode_t::get): Call use method. Lock node only if outside of list lock. (inode_t::get_all_locks_list): Accommodate additional lf_ver field when creating lockf_t structure from object name. (lockf_t::create_lock_obj_attr): Accommodate additional lf_ver field when creating object name from lockf_t structure. Handle STATUS_OBJECT_NAME_COLLISION gracefully in F_POSIX case as well. Change comment accordingly. Increment lf_ver field rather than high byte of lf_wid field. Simplify comment. (fhandler_disk_file::lock): Always call unlock_and_remove rather than just UNLOCK on node. (lf_setlock): Move ret definition where it's used. Drop unneeded tests for obj being not NULL. Only check for deadlock condition if the lock we're trying to establish is a POSIX lock. Revamp object collecting and wait code to cover all cases. Don't return with EDEADLK if blocking process can't be opened for synchronization in F_POSIX case, rather just wait like in F_FLOCK case. Change system_printf to debug_printf in that case. Only run WaitForMultipleObjects with high priority. Close obj and process handles prior to locking node.
2011-08-29 21:50:25 +08:00
/* Increment the lf_ver field until we have no collision. */
++lf_ver;
}
}
}
while (!NT_SUCCESS (status));
/* For BSD locks, notify the parent process. */
if (lf_flags & F_FLOCK)
{
HANDLE parent_proc, parent_thread, parent_lf_obj;
pinfo p (myself->ppid);
if (!p) /* No access or not a Cygwin parent. */
return;
parent_proc = OpenProcess (PROCESS_DUP_HANDLE
| PROCESS_CREATE_THREAD
| PROCESS_QUERY_INFORMATION
| PROCESS_VM_OPERATION
| PROCESS_VM_WRITE
| PROCESS_VM_READ,
FALSE, p->dwProcessId);
if (!parent_proc)
{
debug_printf ("OpenProcess (%u): %E", p->dwProcessId);
return;
}
if (!DuplicateHandle (GetCurrentProcess (), lf_obj, parent_proc,
&parent_lf_obj, TRUE, FALSE, DUPLICATE_SAME_ACCESS))
debug_printf ("DuplicateHandle (lf_obj): %E");
else
{
parent_thread = CreateRemoteThread (parent_proc, NULL, 256 * 1024,
create_lock_in_parent,
parent_lf_obj,
STACK_SIZE_PARAM_IS_A_RESERVATION,
NULL);
if (!parent_thread)
{
debug_printf ("CreateRemoteThread: %E");
/* If thread didn't get started, close object handle in parent,
otherwise suffer handle leaks. */
DuplicateHandle (parent_proc, parent_lf_obj, parent_proc,
NULL, 0, FALSE, DUPLICATE_CLOSE_SOURCE);
}
else
{
/* Must wait to avoid race conditions. */
WaitForSingleObject (parent_thread, INFINITE);
CloseHandle (parent_thread);
}
}
CloseHandle (parent_proc);
}
}
/* Open a lock event object for SYNCHRONIZE access (to wait for it). */
* smallprint.cc (__small_vswprintf): Fix uninitialized usage of `w'. Revamp advisory file locking to avoid cross reference pointers as well as to allow BSD flock semantics. More agressively delete unused nodes and sync objects. * fhandler.h (fhandler_base::ino): Rename from namehash. Fix comment. (fhandler_base::node): Remove. (fhandler_base::unique_id): Add. (fhandler_base::del_my_locks): New method. (get_ino): Rename from get_namehash. Change usage throughout Cygwin. (get_unique_id): New method. * fhandler.cc (fhandler_base::close): Call own del_my_locks method. Fix comment. (fhandler_base::fhandler_base): Accommodate new and changed members. (fhandler_base::fixup_after_fork): Call del_my_locks. (fhandler_base::fixup_after_exec): Ditto for files with close-on-exec flag set. * fhandler_disk_file.cc (get_ino_by_handle): Rename from readdir_get_ino_by_handle. Accommodate throughout. (fhandler_base::open_fs): Fill ino with inode number if FS has good inodes. Allocate a LUID and store in unique_id to recognize file descriptors referencing the same file object. * flock.cc: Drop flock TODO comments. Use explicit types __dev32_t and __ino64_t instead of dev_t and ino_t. (LOCK_OBJ_NAME_LEN): Change to reflect longer lf_id length. (get_obj_handle_count): New method. (lockf_t::lf_id): Change type to long long. (inode_t::get_lock_obj_handle_count): Drop in favor of static function get_obj_handle_count. (inode_t::del_locks): Remove. (inode_t::get): Add create_if_missing flag argument. (inode_t::del_my_locks): Reimplement to handle POSIX and BSD flock locks. Return if node can be deleted or not. (inode_t::~inode_t): Ditto. Close handles to i_dir and i_mtx. (fixup_lockf_after_fork): Remove. (fhandler_base::del_my_locks): New method. (fixup_lockf_after_exec): Check if node can be deleted. (inode_t::get): Only create node if create_if_missing is set. Lock the returned node here before unlocking the node list. (inode_t::get_all_locks_list): Accommodate new lf_id length. (inode_t::create_lock_obj): Ditto. (lockf_t::open_lock_obj): Ditto. Change return type to bool. De-const. Set lf_obj instead of returning a handle. (lockf_t::del_lock_obj): Call SetEvent only if new incoming parameters allow it. Explain how it's supposed to work. (fhandler_disk_file::lock): Only fetch file length in SEEK_END case. Use NtQueryInformationFile(FileStandardInformation) instead of calling fstat_by_handle. Always unlock node before returning. Use fhandler's unique id to create lf_id for BSD flock locks. Rely on node lock from inode_t::get. Call del_lock_obj on removed locks here to allow explicit unlocking. Delete node if no lock exists on the file anymore. (lf_setlock): Get file handle as additional parameter. Handle the fact that lf_getblock now always opens the attached event object. Reactivate erroneously applied patch which deactivates setting thread priority. Additionally handle blocking on BSD flock locks. (lf_clearlock): Get file handle as additional parameter. (lf_getlock): Close event handle opened by lf_getblock. (lf_getblock): Open potentially blocking event object here and check its signal state if it's a BSD flock lock. (lf_wakelock): Get file handle as additional parameter. * fork.cc (frok::child): Drop call to fixup_lockf_after_fork. * ntdll.h (struct _EVENT_BASIC_INFORMATION): Define. (enum _EVENT_INFORMATION_CLASS): Define. (NtQueryEvent): Declare. * fhandler.h (fhandler_base::fs_flags): Remove. (fhandler_base::set_fs_flags): Remove. (fhandler_base::get_fs_flags): Remove. * fhandler.cc (fhandler_base::write): Check for sparse file using pc.fs_flags(). * fhandler_disk_file.cc (fhandler_disk_file::ftruncate): Ditto. The return of the volume serial number in fs_info. * fhandler.h (get_dev): New method. * fhandler_disk_file.cc (fhandler_base::fstat_by_handle): Drop call to NtQueryVolumeInformationFile(FileFsVolumeInformation). Just use get_dev() method. * fhandler_fifo.cc (fhandler_fifo::open) Use device ID and inode number to generate fifo name. * path.h (fs_info::sernum): New member. (fs_info::serial_number): New method. (path_conv::fs_serial_number): New method. * path.cc (fs_info::update): Fetch volume serial number and store in sernum.
2008-04-01 02:03:25 +08:00
bool
lockf_t::open_lock_obj ()
{
lockfattr_t attr;
NTSTATUS status;
status = NtOpenEvent (&lf_obj, FLOCK_EVENT_ACCESS,
create_lock_obj_attr (&attr, 0, alloca (SD_MIN_SIZE)));
if (!NT_SUCCESS (status))
{
SetLastError (RtlNtStatusToDosError (status));
* smallprint.cc (__small_vswprintf): Fix uninitialized usage of `w'. Revamp advisory file locking to avoid cross reference pointers as well as to allow BSD flock semantics. More agressively delete unused nodes and sync objects. * fhandler.h (fhandler_base::ino): Rename from namehash. Fix comment. (fhandler_base::node): Remove. (fhandler_base::unique_id): Add. (fhandler_base::del_my_locks): New method. (get_ino): Rename from get_namehash. Change usage throughout Cygwin. (get_unique_id): New method. * fhandler.cc (fhandler_base::close): Call own del_my_locks method. Fix comment. (fhandler_base::fhandler_base): Accommodate new and changed members. (fhandler_base::fixup_after_fork): Call del_my_locks. (fhandler_base::fixup_after_exec): Ditto for files with close-on-exec flag set. * fhandler_disk_file.cc (get_ino_by_handle): Rename from readdir_get_ino_by_handle. Accommodate throughout. (fhandler_base::open_fs): Fill ino with inode number if FS has good inodes. Allocate a LUID and store in unique_id to recognize file descriptors referencing the same file object. * flock.cc: Drop flock TODO comments. Use explicit types __dev32_t and __ino64_t instead of dev_t and ino_t. (LOCK_OBJ_NAME_LEN): Change to reflect longer lf_id length. (get_obj_handle_count): New method. (lockf_t::lf_id): Change type to long long. (inode_t::get_lock_obj_handle_count): Drop in favor of static function get_obj_handle_count. (inode_t::del_locks): Remove. (inode_t::get): Add create_if_missing flag argument. (inode_t::del_my_locks): Reimplement to handle POSIX and BSD flock locks. Return if node can be deleted or not. (inode_t::~inode_t): Ditto. Close handles to i_dir and i_mtx. (fixup_lockf_after_fork): Remove. (fhandler_base::del_my_locks): New method. (fixup_lockf_after_exec): Check if node can be deleted. (inode_t::get): Only create node if create_if_missing is set. Lock the returned node here before unlocking the node list. (inode_t::get_all_locks_list): Accommodate new lf_id length. (inode_t::create_lock_obj): Ditto. (lockf_t::open_lock_obj): Ditto. Change return type to bool. De-const. Set lf_obj instead of returning a handle. (lockf_t::del_lock_obj): Call SetEvent only if new incoming parameters allow it. Explain how it's supposed to work. (fhandler_disk_file::lock): Only fetch file length in SEEK_END case. Use NtQueryInformationFile(FileStandardInformation) instead of calling fstat_by_handle. Always unlock node before returning. Use fhandler's unique id to create lf_id for BSD flock locks. Rely on node lock from inode_t::get. Call del_lock_obj on removed locks here to allow explicit unlocking. Delete node if no lock exists on the file anymore. (lf_setlock): Get file handle as additional parameter. Handle the fact that lf_getblock now always opens the attached event object. Reactivate erroneously applied patch which deactivates setting thread priority. Additionally handle blocking on BSD flock locks. (lf_clearlock): Get file handle as additional parameter. (lf_getlock): Close event handle opened by lf_getblock. (lf_getblock): Open potentially blocking event object here and check its signal state if it's a BSD flock lock. (lf_wakelock): Get file handle as additional parameter. * fork.cc (frok::child): Drop call to fixup_lockf_after_fork. * ntdll.h (struct _EVENT_BASIC_INFORMATION): Define. (enum _EVENT_INFORMATION_CLASS): Define. (NtQueryEvent): Declare. * fhandler.h (fhandler_base::fs_flags): Remove. (fhandler_base::set_fs_flags): Remove. (fhandler_base::get_fs_flags): Remove. * fhandler.cc (fhandler_base::write): Check for sparse file using pc.fs_flags(). * fhandler_disk_file.cc (fhandler_disk_file::ftruncate): Ditto. The return of the volume serial number in fs_info. * fhandler.h (get_dev): New method. * fhandler_disk_file.cc (fhandler_base::fstat_by_handle): Drop call to NtQueryVolumeInformationFile(FileFsVolumeInformation). Just use get_dev() method. * fhandler_fifo.cc (fhandler_fifo::open) Use device ID and inode number to generate fifo name. * path.h (fs_info::sernum): New member. (fs_info::serial_number): New method. (path_conv::fs_serial_number): New method. * path.cc (fs_info::update): Fetch volume serial number and store in sernum.
2008-04-01 02:03:25 +08:00
lf_obj = NULL; /* Paranoia... */
}
* smallprint.cc (__small_vswprintf): Fix uninitialized usage of `w'. Revamp advisory file locking to avoid cross reference pointers as well as to allow BSD flock semantics. More agressively delete unused nodes and sync objects. * fhandler.h (fhandler_base::ino): Rename from namehash. Fix comment. (fhandler_base::node): Remove. (fhandler_base::unique_id): Add. (fhandler_base::del_my_locks): New method. (get_ino): Rename from get_namehash. Change usage throughout Cygwin. (get_unique_id): New method. * fhandler.cc (fhandler_base::close): Call own del_my_locks method. Fix comment. (fhandler_base::fhandler_base): Accommodate new and changed members. (fhandler_base::fixup_after_fork): Call del_my_locks. (fhandler_base::fixup_after_exec): Ditto for files with close-on-exec flag set. * fhandler_disk_file.cc (get_ino_by_handle): Rename from readdir_get_ino_by_handle. Accommodate throughout. (fhandler_base::open_fs): Fill ino with inode number if FS has good inodes. Allocate a LUID and store in unique_id to recognize file descriptors referencing the same file object. * flock.cc: Drop flock TODO comments. Use explicit types __dev32_t and __ino64_t instead of dev_t and ino_t. (LOCK_OBJ_NAME_LEN): Change to reflect longer lf_id length. (get_obj_handle_count): New method. (lockf_t::lf_id): Change type to long long. (inode_t::get_lock_obj_handle_count): Drop in favor of static function get_obj_handle_count. (inode_t::del_locks): Remove. (inode_t::get): Add create_if_missing flag argument. (inode_t::del_my_locks): Reimplement to handle POSIX and BSD flock locks. Return if node can be deleted or not. (inode_t::~inode_t): Ditto. Close handles to i_dir and i_mtx. (fixup_lockf_after_fork): Remove. (fhandler_base::del_my_locks): New method. (fixup_lockf_after_exec): Check if node can be deleted. (inode_t::get): Only create node if create_if_missing is set. Lock the returned node here before unlocking the node list. (inode_t::get_all_locks_list): Accommodate new lf_id length. (inode_t::create_lock_obj): Ditto. (lockf_t::open_lock_obj): Ditto. Change return type to bool. De-const. Set lf_obj instead of returning a handle. (lockf_t::del_lock_obj): Call SetEvent only if new incoming parameters allow it. Explain how it's supposed to work. (fhandler_disk_file::lock): Only fetch file length in SEEK_END case. Use NtQueryInformationFile(FileStandardInformation) instead of calling fstat_by_handle. Always unlock node before returning. Use fhandler's unique id to create lf_id for BSD flock locks. Rely on node lock from inode_t::get. Call del_lock_obj on removed locks here to allow explicit unlocking. Delete node if no lock exists on the file anymore. (lf_setlock): Get file handle as additional parameter. Handle the fact that lf_getblock now always opens the attached event object. Reactivate erroneously applied patch which deactivates setting thread priority. Additionally handle blocking on BSD flock locks. (lf_clearlock): Get file handle as additional parameter. (lf_getlock): Close event handle opened by lf_getblock. (lf_getblock): Open potentially blocking event object here and check its signal state if it's a BSD flock lock. (lf_wakelock): Get file handle as additional parameter. * fork.cc (frok::child): Drop call to fixup_lockf_after_fork. * ntdll.h (struct _EVENT_BASIC_INFORMATION): Define. (enum _EVENT_INFORMATION_CLASS): Define. (NtQueryEvent): Declare. * fhandler.h (fhandler_base::fs_flags): Remove. (fhandler_base::set_fs_flags): Remove. (fhandler_base::get_fs_flags): Remove. * fhandler.cc (fhandler_base::write): Check for sparse file using pc.fs_flags(). * fhandler_disk_file.cc (fhandler_disk_file::ftruncate): Ditto. The return of the volume serial number in fs_info. * fhandler.h (get_dev): New method. * fhandler_disk_file.cc (fhandler_base::fstat_by_handle): Drop call to NtQueryVolumeInformationFile(FileFsVolumeInformation). Just use get_dev() method. * fhandler_fifo.cc (fhandler_fifo::open) Use device ID and inode number to generate fifo name. * path.h (fs_info::sernum): New member. (fs_info::serial_number): New method. (path_conv::fs_serial_number): New method. * path.cc (fs_info::update): Fetch volume serial number and store in sernum.
2008-04-01 02:03:25 +08:00
return lf_obj != NULL;
}
/* Delete a lock event handle. The important thing here is to signal it
before closing the handle. This way all threads waiting for this lock
can wake up. */
void
* smallprint.cc (__small_vswprintf): Fix uninitialized usage of `w'. Revamp advisory file locking to avoid cross reference pointers as well as to allow BSD flock semantics. More agressively delete unused nodes and sync objects. * fhandler.h (fhandler_base::ino): Rename from namehash. Fix comment. (fhandler_base::node): Remove. (fhandler_base::unique_id): Add. (fhandler_base::del_my_locks): New method. (get_ino): Rename from get_namehash. Change usage throughout Cygwin. (get_unique_id): New method. * fhandler.cc (fhandler_base::close): Call own del_my_locks method. Fix comment. (fhandler_base::fhandler_base): Accommodate new and changed members. (fhandler_base::fixup_after_fork): Call del_my_locks. (fhandler_base::fixup_after_exec): Ditto for files with close-on-exec flag set. * fhandler_disk_file.cc (get_ino_by_handle): Rename from readdir_get_ino_by_handle. Accommodate throughout. (fhandler_base::open_fs): Fill ino with inode number if FS has good inodes. Allocate a LUID and store in unique_id to recognize file descriptors referencing the same file object. * flock.cc: Drop flock TODO comments. Use explicit types __dev32_t and __ino64_t instead of dev_t and ino_t. (LOCK_OBJ_NAME_LEN): Change to reflect longer lf_id length. (get_obj_handle_count): New method. (lockf_t::lf_id): Change type to long long. (inode_t::get_lock_obj_handle_count): Drop in favor of static function get_obj_handle_count. (inode_t::del_locks): Remove. (inode_t::get): Add create_if_missing flag argument. (inode_t::del_my_locks): Reimplement to handle POSIX and BSD flock locks. Return if node can be deleted or not. (inode_t::~inode_t): Ditto. Close handles to i_dir and i_mtx. (fixup_lockf_after_fork): Remove. (fhandler_base::del_my_locks): New method. (fixup_lockf_after_exec): Check if node can be deleted. (inode_t::get): Only create node if create_if_missing is set. Lock the returned node here before unlocking the node list. (inode_t::get_all_locks_list): Accommodate new lf_id length. (inode_t::create_lock_obj): Ditto. (lockf_t::open_lock_obj): Ditto. Change return type to bool. De-const. Set lf_obj instead of returning a handle. (lockf_t::del_lock_obj): Call SetEvent only if new incoming parameters allow it. Explain how it's supposed to work. (fhandler_disk_file::lock): Only fetch file length in SEEK_END case. Use NtQueryInformationFile(FileStandardInformation) instead of calling fstat_by_handle. Always unlock node before returning. Use fhandler's unique id to create lf_id for BSD flock locks. Rely on node lock from inode_t::get. Call del_lock_obj on removed locks here to allow explicit unlocking. Delete node if no lock exists on the file anymore. (lf_setlock): Get file handle as additional parameter. Handle the fact that lf_getblock now always opens the attached event object. Reactivate erroneously applied patch which deactivates setting thread priority. Additionally handle blocking on BSD flock locks. (lf_clearlock): Get file handle as additional parameter. (lf_getlock): Close event handle opened by lf_getblock. (lf_getblock): Open potentially blocking event object here and check its signal state if it's a BSD flock lock. (lf_wakelock): Get file handle as additional parameter. * fork.cc (frok::child): Drop call to fixup_lockf_after_fork. * ntdll.h (struct _EVENT_BASIC_INFORMATION): Define. (enum _EVENT_INFORMATION_CLASS): Define. (NtQueryEvent): Declare. * fhandler.h (fhandler_base::fs_flags): Remove. (fhandler_base::set_fs_flags): Remove. (fhandler_base::get_fs_flags): Remove. * fhandler.cc (fhandler_base::write): Check for sparse file using pc.fs_flags(). * fhandler_disk_file.cc (fhandler_disk_file::ftruncate): Ditto. The return of the volume serial number in fs_info. * fhandler.h (get_dev): New method. * fhandler_disk_file.cc (fhandler_base::fstat_by_handle): Drop call to NtQueryVolumeInformationFile(FileFsVolumeInformation). Just use get_dev() method. * fhandler_fifo.cc (fhandler_fifo::open) Use device ID and inode number to generate fifo name. * path.h (fs_info::sernum): New member. (fs_info::serial_number): New method. (path_conv::fs_serial_number): New method. * path.cc (fs_info::update): Fetch volume serial number and store in sernum.
2008-04-01 02:03:25 +08:00
lockf_t::del_lock_obj (HANDLE fhdl, bool signal)
{
if (lf_obj)
{
* smallprint.cc (__small_vswprintf): Fix uninitialized usage of `w'. Revamp advisory file locking to avoid cross reference pointers as well as to allow BSD flock semantics. More agressively delete unused nodes and sync objects. * fhandler.h (fhandler_base::ino): Rename from namehash. Fix comment. (fhandler_base::node): Remove. (fhandler_base::unique_id): Add. (fhandler_base::del_my_locks): New method. (get_ino): Rename from get_namehash. Change usage throughout Cygwin. (get_unique_id): New method. * fhandler.cc (fhandler_base::close): Call own del_my_locks method. Fix comment. (fhandler_base::fhandler_base): Accommodate new and changed members. (fhandler_base::fixup_after_fork): Call del_my_locks. (fhandler_base::fixup_after_exec): Ditto for files with close-on-exec flag set. * fhandler_disk_file.cc (get_ino_by_handle): Rename from readdir_get_ino_by_handle. Accommodate throughout. (fhandler_base::open_fs): Fill ino with inode number if FS has good inodes. Allocate a LUID and store in unique_id to recognize file descriptors referencing the same file object. * flock.cc: Drop flock TODO comments. Use explicit types __dev32_t and __ino64_t instead of dev_t and ino_t. (LOCK_OBJ_NAME_LEN): Change to reflect longer lf_id length. (get_obj_handle_count): New method. (lockf_t::lf_id): Change type to long long. (inode_t::get_lock_obj_handle_count): Drop in favor of static function get_obj_handle_count. (inode_t::del_locks): Remove. (inode_t::get): Add create_if_missing flag argument. (inode_t::del_my_locks): Reimplement to handle POSIX and BSD flock locks. Return if node can be deleted or not. (inode_t::~inode_t): Ditto. Close handles to i_dir and i_mtx. (fixup_lockf_after_fork): Remove. (fhandler_base::del_my_locks): New method. (fixup_lockf_after_exec): Check if node can be deleted. (inode_t::get): Only create node if create_if_missing is set. Lock the returned node here before unlocking the node list. (inode_t::get_all_locks_list): Accommodate new lf_id length. (inode_t::create_lock_obj): Ditto. (lockf_t::open_lock_obj): Ditto. Change return type to bool. De-const. Set lf_obj instead of returning a handle. (lockf_t::del_lock_obj): Call SetEvent only if new incoming parameters allow it. Explain how it's supposed to work. (fhandler_disk_file::lock): Only fetch file length in SEEK_END case. Use NtQueryInformationFile(FileStandardInformation) instead of calling fstat_by_handle. Always unlock node before returning. Use fhandler's unique id to create lf_id for BSD flock locks. Rely on node lock from inode_t::get. Call del_lock_obj on removed locks here to allow explicit unlocking. Delete node if no lock exists on the file anymore. (lf_setlock): Get file handle as additional parameter. Handle the fact that lf_getblock now always opens the attached event object. Reactivate erroneously applied patch which deactivates setting thread priority. Additionally handle blocking on BSD flock locks. (lf_clearlock): Get file handle as additional parameter. (lf_getlock): Close event handle opened by lf_getblock. (lf_getblock): Open potentially blocking event object here and check its signal state if it's a BSD flock lock. (lf_wakelock): Get file handle as additional parameter. * fork.cc (frok::child): Drop call to fixup_lockf_after_fork. * ntdll.h (struct _EVENT_BASIC_INFORMATION): Define. (enum _EVENT_INFORMATION_CLASS): Define. (NtQueryEvent): Declare. * fhandler.h (fhandler_base::fs_flags): Remove. (fhandler_base::set_fs_flags): Remove. (fhandler_base::get_fs_flags): Remove. * fhandler.cc (fhandler_base::write): Check for sparse file using pc.fs_flags(). * fhandler_disk_file.cc (fhandler_disk_file::ftruncate): Ditto. The return of the volume serial number in fs_info. * fhandler.h (get_dev): New method. * fhandler_disk_file.cc (fhandler_base::fstat_by_handle): Drop call to NtQueryVolumeInformationFile(FileFsVolumeInformation). Just use get_dev() method. * fhandler_fifo.cc (fhandler_fifo::open) Use device ID and inode number to generate fifo name. * path.h (fs_info::sernum): New member. (fs_info::serial_number): New method. (path_conv::fs_serial_number): New method. * path.cc (fs_info::update): Fetch volume serial number and store in sernum.
2008-04-01 02:03:25 +08:00
/* Only signal the event if it's either a POSIX lock, or, in case of
BSD flock locks, if it's an explicit unlock or if the calling fhandler
holds the last reference to the file table entry. The file table
entry in UNIX terms is equivalent to the FILE_OBJECT in Windows NT
terms. It's what the handle/descriptor references when calling
CreateFile/open. Calling DuplicateHandle/dup only creates a new
handle/descriptor to the same FILE_OBJECT/file table entry. */
if ((lf_flags & F_POSIX) || signal
|| (fhdl && get_obj_handle_count (fhdl) <= 1))
{
NTSTATUS status = NtSetEvent (lf_obj, NULL);
if (!NT_SUCCESS (status))
system_printf ("NtSetEvent, %y", status);
/* For BSD locks, notify the parent process. */
if (lf_flags & F_FLOCK)
{
HANDLE parent_proc, parent_thread;
pinfo p (myself->ppid);
if (p && (parent_proc = OpenProcess (PROCESS_CREATE_THREAD
| PROCESS_QUERY_INFORMATION
| PROCESS_VM_OPERATION
| PROCESS_VM_WRITE
| PROCESS_VM_READ,
FALSE, p->dwProcessId)))
{
parent_thread = CreateRemoteThread (parent_proc, NULL,
256 * 1024, delete_lock_in_parent,
NULL,
STACK_SIZE_PARAM_IS_A_RESERVATION,
NULL);
if (parent_thread)
{
/* Must wait to avoid race conditions. */
WaitForSingleObject (parent_thread, INFINITE);
CloseHandle (parent_thread);
}
CloseHandle (parent_proc);
}
}
}
close_lock_obj ();
}
}
lockf_t::~lockf_t ()
{
* smallprint.cc (__small_vswprintf): Fix uninitialized usage of `w'. Revamp advisory file locking to avoid cross reference pointers as well as to allow BSD flock semantics. More agressively delete unused nodes and sync objects. * fhandler.h (fhandler_base::ino): Rename from namehash. Fix comment. (fhandler_base::node): Remove. (fhandler_base::unique_id): Add. (fhandler_base::del_my_locks): New method. (get_ino): Rename from get_namehash. Change usage throughout Cygwin. (get_unique_id): New method. * fhandler.cc (fhandler_base::close): Call own del_my_locks method. Fix comment. (fhandler_base::fhandler_base): Accommodate new and changed members. (fhandler_base::fixup_after_fork): Call del_my_locks. (fhandler_base::fixup_after_exec): Ditto for files with close-on-exec flag set. * fhandler_disk_file.cc (get_ino_by_handle): Rename from readdir_get_ino_by_handle. Accommodate throughout. (fhandler_base::open_fs): Fill ino with inode number if FS has good inodes. Allocate a LUID and store in unique_id to recognize file descriptors referencing the same file object. * flock.cc: Drop flock TODO comments. Use explicit types __dev32_t and __ino64_t instead of dev_t and ino_t. (LOCK_OBJ_NAME_LEN): Change to reflect longer lf_id length. (get_obj_handle_count): New method. (lockf_t::lf_id): Change type to long long. (inode_t::get_lock_obj_handle_count): Drop in favor of static function get_obj_handle_count. (inode_t::del_locks): Remove. (inode_t::get): Add create_if_missing flag argument. (inode_t::del_my_locks): Reimplement to handle POSIX and BSD flock locks. Return if node can be deleted or not. (inode_t::~inode_t): Ditto. Close handles to i_dir and i_mtx. (fixup_lockf_after_fork): Remove. (fhandler_base::del_my_locks): New method. (fixup_lockf_after_exec): Check if node can be deleted. (inode_t::get): Only create node if create_if_missing is set. Lock the returned node here before unlocking the node list. (inode_t::get_all_locks_list): Accommodate new lf_id length. (inode_t::create_lock_obj): Ditto. (lockf_t::open_lock_obj): Ditto. Change return type to bool. De-const. Set lf_obj instead of returning a handle. (lockf_t::del_lock_obj): Call SetEvent only if new incoming parameters allow it. Explain how it's supposed to work. (fhandler_disk_file::lock): Only fetch file length in SEEK_END case. Use NtQueryInformationFile(FileStandardInformation) instead of calling fstat_by_handle. Always unlock node before returning. Use fhandler's unique id to create lf_id for BSD flock locks. Rely on node lock from inode_t::get. Call del_lock_obj on removed locks here to allow explicit unlocking. Delete node if no lock exists on the file anymore. (lf_setlock): Get file handle as additional parameter. Handle the fact that lf_getblock now always opens the attached event object. Reactivate erroneously applied patch which deactivates setting thread priority. Additionally handle blocking on BSD flock locks. (lf_clearlock): Get file handle as additional parameter. (lf_getlock): Close event handle opened by lf_getblock. (lf_getblock): Open potentially blocking event object here and check its signal state if it's a BSD flock lock. (lf_wakelock): Get file handle as additional parameter. * fork.cc (frok::child): Drop call to fixup_lockf_after_fork. * ntdll.h (struct _EVENT_BASIC_INFORMATION): Define. (enum _EVENT_INFORMATION_CLASS): Define. (NtQueryEvent): Declare. * fhandler.h (fhandler_base::fs_flags): Remove. (fhandler_base::set_fs_flags): Remove. (fhandler_base::get_fs_flags): Remove. * fhandler.cc (fhandler_base::write): Check for sparse file using pc.fs_flags(). * fhandler_disk_file.cc (fhandler_disk_file::ftruncate): Ditto. The return of the volume serial number in fs_info. * fhandler.h (get_dev): New method. * fhandler_disk_file.cc (fhandler_base::fstat_by_handle): Drop call to NtQueryVolumeInformationFile(FileFsVolumeInformation). Just use get_dev() method. * fhandler_fifo.cc (fhandler_fifo::open) Use device ID and inode number to generate fifo name. * path.h (fs_info::sernum): New member. (fs_info::serial_number): New method. (path_conv::fs_serial_number): New method. * path.cc (fs_info::update): Fetch volume serial number and store in sernum.
2008-04-01 02:03:25 +08:00
del_lock_obj (NULL);
}
/*
* This variable controls the maximum number of processes that will
* be checked in doing deadlock detection.
*/
* smallprint.cc (__small_vswprintf): Fix uninitialized usage of `w'. Revamp advisory file locking to avoid cross reference pointers as well as to allow BSD flock semantics. More agressively delete unused nodes and sync objects. * fhandler.h (fhandler_base::ino): Rename from namehash. Fix comment. (fhandler_base::node): Remove. (fhandler_base::unique_id): Add. (fhandler_base::del_my_locks): New method. (get_ino): Rename from get_namehash. Change usage throughout Cygwin. (get_unique_id): New method. * fhandler.cc (fhandler_base::close): Call own del_my_locks method. Fix comment. (fhandler_base::fhandler_base): Accommodate new and changed members. (fhandler_base::fixup_after_fork): Call del_my_locks. (fhandler_base::fixup_after_exec): Ditto for files with close-on-exec flag set. * fhandler_disk_file.cc (get_ino_by_handle): Rename from readdir_get_ino_by_handle. Accommodate throughout. (fhandler_base::open_fs): Fill ino with inode number if FS has good inodes. Allocate a LUID and store in unique_id to recognize file descriptors referencing the same file object. * flock.cc: Drop flock TODO comments. Use explicit types __dev32_t and __ino64_t instead of dev_t and ino_t. (LOCK_OBJ_NAME_LEN): Change to reflect longer lf_id length. (get_obj_handle_count): New method. (lockf_t::lf_id): Change type to long long. (inode_t::get_lock_obj_handle_count): Drop in favor of static function get_obj_handle_count. (inode_t::del_locks): Remove. (inode_t::get): Add create_if_missing flag argument. (inode_t::del_my_locks): Reimplement to handle POSIX and BSD flock locks. Return if node can be deleted or not. (inode_t::~inode_t): Ditto. Close handles to i_dir and i_mtx. (fixup_lockf_after_fork): Remove. (fhandler_base::del_my_locks): New method. (fixup_lockf_after_exec): Check if node can be deleted. (inode_t::get): Only create node if create_if_missing is set. Lock the returned node here before unlocking the node list. (inode_t::get_all_locks_list): Accommodate new lf_id length. (inode_t::create_lock_obj): Ditto. (lockf_t::open_lock_obj): Ditto. Change return type to bool. De-const. Set lf_obj instead of returning a handle. (lockf_t::del_lock_obj): Call SetEvent only if new incoming parameters allow it. Explain how it's supposed to work. (fhandler_disk_file::lock): Only fetch file length in SEEK_END case. Use NtQueryInformationFile(FileStandardInformation) instead of calling fstat_by_handle. Always unlock node before returning. Use fhandler's unique id to create lf_id for BSD flock locks. Rely on node lock from inode_t::get. Call del_lock_obj on removed locks here to allow explicit unlocking. Delete node if no lock exists on the file anymore. (lf_setlock): Get file handle as additional parameter. Handle the fact that lf_getblock now always opens the attached event object. Reactivate erroneously applied patch which deactivates setting thread priority. Additionally handle blocking on BSD flock locks. (lf_clearlock): Get file handle as additional parameter. (lf_getlock): Close event handle opened by lf_getblock. (lf_getblock): Open potentially blocking event object here and check its signal state if it's a BSD flock lock. (lf_wakelock): Get file handle as additional parameter. * fork.cc (frok::child): Drop call to fixup_lockf_after_fork. * ntdll.h (struct _EVENT_BASIC_INFORMATION): Define. (enum _EVENT_INFORMATION_CLASS): Define. (NtQueryEvent): Declare. * fhandler.h (fhandler_base::fs_flags): Remove. (fhandler_base::set_fs_flags): Remove. (fhandler_base::get_fs_flags): Remove. * fhandler.cc (fhandler_base::write): Check for sparse file using pc.fs_flags(). * fhandler_disk_file.cc (fhandler_disk_file::ftruncate): Ditto. The return of the volume serial number in fs_info. * fhandler.h (get_dev): New method. * fhandler_disk_file.cc (fhandler_base::fstat_by_handle): Drop call to NtQueryVolumeInformationFile(FileFsVolumeInformation). Just use get_dev() method. * fhandler_fifo.cc (fhandler_fifo::open) Use device ID and inode number to generate fifo name. * path.h (fs_info::sernum): New member. (fs_info::serial_number): New method. (path_conv::fs_serial_number): New method. * path.cc (fs_info::update): Fetch volume serial number and store in sernum.
2008-04-01 02:03:25 +08:00
#ifndef __CYGWIN__
#define MAXDEPTH 50
static int maxlockdepth = MAXDEPTH;
#endif
#define NOLOCKF (struct lockf_t *)0
#define SELF 0x1
#define OTHERS 0x2
* smallprint.cc (__small_vswprintf): Fix uninitialized usage of `w'. Revamp advisory file locking to avoid cross reference pointers as well as to allow BSD flock semantics. More agressively delete unused nodes and sync objects. * fhandler.h (fhandler_base::ino): Rename from namehash. Fix comment. (fhandler_base::node): Remove. (fhandler_base::unique_id): Add. (fhandler_base::del_my_locks): New method. (get_ino): Rename from get_namehash. Change usage throughout Cygwin. (get_unique_id): New method. * fhandler.cc (fhandler_base::close): Call own del_my_locks method. Fix comment. (fhandler_base::fhandler_base): Accommodate new and changed members. (fhandler_base::fixup_after_fork): Call del_my_locks. (fhandler_base::fixup_after_exec): Ditto for files with close-on-exec flag set. * fhandler_disk_file.cc (get_ino_by_handle): Rename from readdir_get_ino_by_handle. Accommodate throughout. (fhandler_base::open_fs): Fill ino with inode number if FS has good inodes. Allocate a LUID and store in unique_id to recognize file descriptors referencing the same file object. * flock.cc: Drop flock TODO comments. Use explicit types __dev32_t and __ino64_t instead of dev_t and ino_t. (LOCK_OBJ_NAME_LEN): Change to reflect longer lf_id length. (get_obj_handle_count): New method. (lockf_t::lf_id): Change type to long long. (inode_t::get_lock_obj_handle_count): Drop in favor of static function get_obj_handle_count. (inode_t::del_locks): Remove. (inode_t::get): Add create_if_missing flag argument. (inode_t::del_my_locks): Reimplement to handle POSIX and BSD flock locks. Return if node can be deleted or not. (inode_t::~inode_t): Ditto. Close handles to i_dir and i_mtx. (fixup_lockf_after_fork): Remove. (fhandler_base::del_my_locks): New method. (fixup_lockf_after_exec): Check if node can be deleted. (inode_t::get): Only create node if create_if_missing is set. Lock the returned node here before unlocking the node list. (inode_t::get_all_locks_list): Accommodate new lf_id length. (inode_t::create_lock_obj): Ditto. (lockf_t::open_lock_obj): Ditto. Change return type to bool. De-const. Set lf_obj instead of returning a handle. (lockf_t::del_lock_obj): Call SetEvent only if new incoming parameters allow it. Explain how it's supposed to work. (fhandler_disk_file::lock): Only fetch file length in SEEK_END case. Use NtQueryInformationFile(FileStandardInformation) instead of calling fstat_by_handle. Always unlock node before returning. Use fhandler's unique id to create lf_id for BSD flock locks. Rely on node lock from inode_t::get. Call del_lock_obj on removed locks here to allow explicit unlocking. Delete node if no lock exists on the file anymore. (lf_setlock): Get file handle as additional parameter. Handle the fact that lf_getblock now always opens the attached event object. Reactivate erroneously applied patch which deactivates setting thread priority. Additionally handle blocking on BSD flock locks. (lf_clearlock): Get file handle as additional parameter. (lf_getlock): Close event handle opened by lf_getblock. (lf_getblock): Open potentially blocking event object here and check its signal state if it's a BSD flock lock. (lf_wakelock): Get file handle as additional parameter. * fork.cc (frok::child): Drop call to fixup_lockf_after_fork. * ntdll.h (struct _EVENT_BASIC_INFORMATION): Define. (enum _EVENT_INFORMATION_CLASS): Define. (NtQueryEvent): Declare. * fhandler.h (fhandler_base::fs_flags): Remove. (fhandler_base::set_fs_flags): Remove. (fhandler_base::get_fs_flags): Remove. * fhandler.cc (fhandler_base::write): Check for sparse file using pc.fs_flags(). * fhandler_disk_file.cc (fhandler_disk_file::ftruncate): Ditto. The return of the volume serial number in fs_info. * fhandler.h (get_dev): New method. * fhandler_disk_file.cc (fhandler_base::fstat_by_handle): Drop call to NtQueryVolumeInformationFile(FileFsVolumeInformation). Just use get_dev() method. * fhandler_fifo.cc (fhandler_fifo::open) Use device ID and inode number to generate fifo name. * path.h (fs_info::sernum): New member. (fs_info::serial_number): New method. (path_conv::fs_serial_number): New method. * path.cc (fs_info::update): Fetch volume serial number and store in sernum.
2008-04-01 02:03:25 +08:00
static int lf_clearlock (lockf_t *, lockf_t **, HANDLE);
static int lf_findoverlap (lockf_t *, lockf_t *, int, lockf_t ***, lockf_t **);
static lockf_t *lf_getblock (lockf_t *, inode_t *node);
2013-04-23 17:44:36 +08:00
static int lf_getlock (lockf_t *, inode_t *, struct flock *);
* smallprint.cc (__small_vswprintf): Fix uninitialized usage of `w'. Revamp advisory file locking to avoid cross reference pointers as well as to allow BSD flock semantics. More agressively delete unused nodes and sync objects. * fhandler.h (fhandler_base::ino): Rename from namehash. Fix comment. (fhandler_base::node): Remove. (fhandler_base::unique_id): Add. (fhandler_base::del_my_locks): New method. (get_ino): Rename from get_namehash. Change usage throughout Cygwin. (get_unique_id): New method. * fhandler.cc (fhandler_base::close): Call own del_my_locks method. Fix comment. (fhandler_base::fhandler_base): Accommodate new and changed members. (fhandler_base::fixup_after_fork): Call del_my_locks. (fhandler_base::fixup_after_exec): Ditto for files with close-on-exec flag set. * fhandler_disk_file.cc (get_ino_by_handle): Rename from readdir_get_ino_by_handle. Accommodate throughout. (fhandler_base::open_fs): Fill ino with inode number if FS has good inodes. Allocate a LUID and store in unique_id to recognize file descriptors referencing the same file object. * flock.cc: Drop flock TODO comments. Use explicit types __dev32_t and __ino64_t instead of dev_t and ino_t. (LOCK_OBJ_NAME_LEN): Change to reflect longer lf_id length. (get_obj_handle_count): New method. (lockf_t::lf_id): Change type to long long. (inode_t::get_lock_obj_handle_count): Drop in favor of static function get_obj_handle_count. (inode_t::del_locks): Remove. (inode_t::get): Add create_if_missing flag argument. (inode_t::del_my_locks): Reimplement to handle POSIX and BSD flock locks. Return if node can be deleted or not. (inode_t::~inode_t): Ditto. Close handles to i_dir and i_mtx. (fixup_lockf_after_fork): Remove. (fhandler_base::del_my_locks): New method. (fixup_lockf_after_exec): Check if node can be deleted. (inode_t::get): Only create node if create_if_missing is set. Lock the returned node here before unlocking the node list. (inode_t::get_all_locks_list): Accommodate new lf_id length. (inode_t::create_lock_obj): Ditto. (lockf_t::open_lock_obj): Ditto. Change return type to bool. De-const. Set lf_obj instead of returning a handle. (lockf_t::del_lock_obj): Call SetEvent only if new incoming parameters allow it. Explain how it's supposed to work. (fhandler_disk_file::lock): Only fetch file length in SEEK_END case. Use NtQueryInformationFile(FileStandardInformation) instead of calling fstat_by_handle. Always unlock node before returning. Use fhandler's unique id to create lf_id for BSD flock locks. Rely on node lock from inode_t::get. Call del_lock_obj on removed locks here to allow explicit unlocking. Delete node if no lock exists on the file anymore. (lf_setlock): Get file handle as additional parameter. Handle the fact that lf_getblock now always opens the attached event object. Reactivate erroneously applied patch which deactivates setting thread priority. Additionally handle blocking on BSD flock locks. (lf_clearlock): Get file handle as additional parameter. (lf_getlock): Close event handle opened by lf_getblock. (lf_getblock): Open potentially blocking event object here and check its signal state if it's a BSD flock lock. (lf_wakelock): Get file handle as additional parameter. * fork.cc (frok::child): Drop call to fixup_lockf_after_fork. * ntdll.h (struct _EVENT_BASIC_INFORMATION): Define. (enum _EVENT_INFORMATION_CLASS): Define. (NtQueryEvent): Declare. * fhandler.h (fhandler_base::fs_flags): Remove. (fhandler_base::set_fs_flags): Remove. (fhandler_base::get_fs_flags): Remove. * fhandler.cc (fhandler_base::write): Check for sparse file using pc.fs_flags(). * fhandler_disk_file.cc (fhandler_disk_file::ftruncate): Ditto. The return of the volume serial number in fs_info. * fhandler.h (get_dev): New method. * fhandler_disk_file.cc (fhandler_base::fstat_by_handle): Drop call to NtQueryVolumeInformationFile(FileFsVolumeInformation). Just use get_dev() method. * fhandler_fifo.cc (fhandler_fifo::open) Use device ID and inode number to generate fifo name. * path.h (fs_info::sernum): New member. (fs_info::serial_number): New method. (path_conv::fs_serial_number): New method. * path.cc (fs_info::update): Fetch volume serial number and store in sernum.
2008-04-01 02:03:25 +08:00
static int lf_setlock (lockf_t *, inode_t *, lockf_t **, HANDLE);
static void lf_split (lockf_t *, lockf_t *, lockf_t **);
* smallprint.cc (__small_vswprintf): Fix uninitialized usage of `w'. Revamp advisory file locking to avoid cross reference pointers as well as to allow BSD flock semantics. More agressively delete unused nodes and sync objects. * fhandler.h (fhandler_base::ino): Rename from namehash. Fix comment. (fhandler_base::node): Remove. (fhandler_base::unique_id): Add. (fhandler_base::del_my_locks): New method. (get_ino): Rename from get_namehash. Change usage throughout Cygwin. (get_unique_id): New method. * fhandler.cc (fhandler_base::close): Call own del_my_locks method. Fix comment. (fhandler_base::fhandler_base): Accommodate new and changed members. (fhandler_base::fixup_after_fork): Call del_my_locks. (fhandler_base::fixup_after_exec): Ditto for files with close-on-exec flag set. * fhandler_disk_file.cc (get_ino_by_handle): Rename from readdir_get_ino_by_handle. Accommodate throughout. (fhandler_base::open_fs): Fill ino with inode number if FS has good inodes. Allocate a LUID and store in unique_id to recognize file descriptors referencing the same file object. * flock.cc: Drop flock TODO comments. Use explicit types __dev32_t and __ino64_t instead of dev_t and ino_t. (LOCK_OBJ_NAME_LEN): Change to reflect longer lf_id length. (get_obj_handle_count): New method. (lockf_t::lf_id): Change type to long long. (inode_t::get_lock_obj_handle_count): Drop in favor of static function get_obj_handle_count. (inode_t::del_locks): Remove. (inode_t::get): Add create_if_missing flag argument. (inode_t::del_my_locks): Reimplement to handle POSIX and BSD flock locks. Return if node can be deleted or not. (inode_t::~inode_t): Ditto. Close handles to i_dir and i_mtx. (fixup_lockf_after_fork): Remove. (fhandler_base::del_my_locks): New method. (fixup_lockf_after_exec): Check if node can be deleted. (inode_t::get): Only create node if create_if_missing is set. Lock the returned node here before unlocking the node list. (inode_t::get_all_locks_list): Accommodate new lf_id length. (inode_t::create_lock_obj): Ditto. (lockf_t::open_lock_obj): Ditto. Change return type to bool. De-const. Set lf_obj instead of returning a handle. (lockf_t::del_lock_obj): Call SetEvent only if new incoming parameters allow it. Explain how it's supposed to work. (fhandler_disk_file::lock): Only fetch file length in SEEK_END case. Use NtQueryInformationFile(FileStandardInformation) instead of calling fstat_by_handle. Always unlock node before returning. Use fhandler's unique id to create lf_id for BSD flock locks. Rely on node lock from inode_t::get. Call del_lock_obj on removed locks here to allow explicit unlocking. Delete node if no lock exists on the file anymore. (lf_setlock): Get file handle as additional parameter. Handle the fact that lf_getblock now always opens the attached event object. Reactivate erroneously applied patch which deactivates setting thread priority. Additionally handle blocking on BSD flock locks. (lf_clearlock): Get file handle as additional parameter. (lf_getlock): Close event handle opened by lf_getblock. (lf_getblock): Open potentially blocking event object here and check its signal state if it's a BSD flock lock. (lf_wakelock): Get file handle as additional parameter. * fork.cc (frok::child): Drop call to fixup_lockf_after_fork. * ntdll.h (struct _EVENT_BASIC_INFORMATION): Define. (enum _EVENT_INFORMATION_CLASS): Define. (NtQueryEvent): Declare. * fhandler.h (fhandler_base::fs_flags): Remove. (fhandler_base::set_fs_flags): Remove. (fhandler_base::get_fs_flags): Remove. * fhandler.cc (fhandler_base::write): Check for sparse file using pc.fs_flags(). * fhandler_disk_file.cc (fhandler_disk_file::ftruncate): Ditto. The return of the volume serial number in fs_info. * fhandler.h (get_dev): New method. * fhandler_disk_file.cc (fhandler_base::fstat_by_handle): Drop call to NtQueryVolumeInformationFile(FileFsVolumeInformation). Just use get_dev() method. * fhandler_fifo.cc (fhandler_fifo::open) Use device ID and inode number to generate fifo name. * path.h (fs_info::sernum): New member. (fs_info::serial_number): New method. (path_conv::fs_serial_number): New method. * path.cc (fs_info::update): Fetch volume serial number and store in sernum.
2008-04-01 02:03:25 +08:00
static void lf_wakelock (lockf_t *, HANDLE);
/* This is the fcntl advisory lock implementation. For the implementation
of mandatory locks using the Windows mandatory locking functions, see the
fhandler_disk_file::mand_lock method at the end of this file. */
int
fhandler_base::lock (int a_op, struct flock *fl)
{
2013-04-23 17:44:36 +08:00
off_t start, end, oadd;
int error = 0;
short a_flags = fl->l_type & (F_POSIX | F_FLOCK);
short type = fl->l_type & (F_RDLCK | F_WRLCK | F_UNLCK);
if (!a_flags)
a_flags = F_POSIX; /* default */
/* FIXME: For BSD flock(2) we need a valid, per file table entry OS handle.
Therefore we can't allow using flock(2) on nohandle devices and
pre-Windows 8 console handles (recognized by their odd handle value). */
if ((a_flags & F_FLOCK)
&& (nohandle () || (((uintptr_t) get_handle () & 0x3) == 0x3)))
{
set_errno (EINVAL);
debug_printf ("BSD locking on nohandle and old-style console devices "
"not supported");
return -1;
}
if (a_op == F_SETLKW)
{
a_op = F_SETLK;
a_flags |= F_WAIT;
}
if (a_op == F_SETLK)
switch (type)
{
case F_UNLCK:
a_op = F_UNLCK;
break;
case F_RDLCK:
/* flock semantics don't specify a requirement that the file has
been opened with a specific open mode, in contrast to POSIX locks
which require that a file is opened for reading to place a read
lock and opened for writing to place a write lock. */
/* CV 2013-10-22: Test POSIX R/W mode flags rather than Windows R/W
access flags. The reason is that POSIX mode flags are set for
all types of fhandlers, while Windows access flags are only set
for most of the actual Windows device backed fhandlers. */
if ((a_flags & F_POSIX)
&& ((get_flags () & O_ACCMODE) == O_WRONLY))
{
debug_printf ("request F_RDLCK on O_WRONLY file: EBADF");
set_errno (EBADF);
return -1;
}
break;
case F_WRLCK:
/* See above comment. */
if ((a_flags & F_POSIX)
&& ((get_flags () & O_ACCMODE) == O_RDONLY))
{
debug_printf ("request F_WRLCK on O_RDONLY file: EBADF");
set_errno (EBADF);
return -1;
}
break;
default:
set_errno (EINVAL);
return -1;
}
/*
* Convert the flock structure into a start and end.
*/
switch (fl->l_whence)
{
case SEEK_SET:
start = fl->l_start;
break;
case SEEK_CUR:
if ((start = lseek (0, SEEK_CUR)) == ILLEGAL_SEEK)
start = 0;
break;
case SEEK_END:
if (get_device () != FH_FS)
start = 0;
else
{
NTSTATUS status;
IO_STATUS_BLOCK io;
FILE_STANDARD_INFORMATION fsi;
* smallprint.cc (__small_vswprintf): Fix uninitialized usage of `w'. Revamp advisory file locking to avoid cross reference pointers as well as to allow BSD flock semantics. More agressively delete unused nodes and sync objects. * fhandler.h (fhandler_base::ino): Rename from namehash. Fix comment. (fhandler_base::node): Remove. (fhandler_base::unique_id): Add. (fhandler_base::del_my_locks): New method. (get_ino): Rename from get_namehash. Change usage throughout Cygwin. (get_unique_id): New method. * fhandler.cc (fhandler_base::close): Call own del_my_locks method. Fix comment. (fhandler_base::fhandler_base): Accommodate new and changed members. (fhandler_base::fixup_after_fork): Call del_my_locks. (fhandler_base::fixup_after_exec): Ditto for files with close-on-exec flag set. * fhandler_disk_file.cc (get_ino_by_handle): Rename from readdir_get_ino_by_handle. Accommodate throughout. (fhandler_base::open_fs): Fill ino with inode number if FS has good inodes. Allocate a LUID and store in unique_id to recognize file descriptors referencing the same file object. * flock.cc: Drop flock TODO comments. Use explicit types __dev32_t and __ino64_t instead of dev_t and ino_t. (LOCK_OBJ_NAME_LEN): Change to reflect longer lf_id length. (get_obj_handle_count): New method. (lockf_t::lf_id): Change type to long long. (inode_t::get_lock_obj_handle_count): Drop in favor of static function get_obj_handle_count. (inode_t::del_locks): Remove. (inode_t::get): Add create_if_missing flag argument. (inode_t::del_my_locks): Reimplement to handle POSIX and BSD flock locks. Return if node can be deleted or not. (inode_t::~inode_t): Ditto. Close handles to i_dir and i_mtx. (fixup_lockf_after_fork): Remove. (fhandler_base::del_my_locks): New method. (fixup_lockf_after_exec): Check if node can be deleted. (inode_t::get): Only create node if create_if_missing is set. Lock the returned node here before unlocking the node list. (inode_t::get_all_locks_list): Accommodate new lf_id length. (inode_t::create_lock_obj): Ditto. (lockf_t::open_lock_obj): Ditto. Change return type to bool. De-const. Set lf_obj instead of returning a handle. (lockf_t::del_lock_obj): Call SetEvent only if new incoming parameters allow it. Explain how it's supposed to work. (fhandler_disk_file::lock): Only fetch file length in SEEK_END case. Use NtQueryInformationFile(FileStandardInformation) instead of calling fstat_by_handle. Always unlock node before returning. Use fhandler's unique id to create lf_id for BSD flock locks. Rely on node lock from inode_t::get. Call del_lock_obj on removed locks here to allow explicit unlocking. Delete node if no lock exists on the file anymore. (lf_setlock): Get file handle as additional parameter. Handle the fact that lf_getblock now always opens the attached event object. Reactivate erroneously applied patch which deactivates setting thread priority. Additionally handle blocking on BSD flock locks. (lf_clearlock): Get file handle as additional parameter. (lf_getlock): Close event handle opened by lf_getblock. (lf_getblock): Open potentially blocking event object here and check its signal state if it's a BSD flock lock. (lf_wakelock): Get file handle as additional parameter. * fork.cc (frok::child): Drop call to fixup_lockf_after_fork. * ntdll.h (struct _EVENT_BASIC_INFORMATION): Define. (enum _EVENT_INFORMATION_CLASS): Define. (NtQueryEvent): Declare. * fhandler.h (fhandler_base::fs_flags): Remove. (fhandler_base::set_fs_flags): Remove. (fhandler_base::get_fs_flags): Remove. * fhandler.cc (fhandler_base::write): Check for sparse file using pc.fs_flags(). * fhandler_disk_file.cc (fhandler_disk_file::ftruncate): Ditto. The return of the volume serial number in fs_info. * fhandler.h (get_dev): New method. * fhandler_disk_file.cc (fhandler_base::fstat_by_handle): Drop call to NtQueryVolumeInformationFile(FileFsVolumeInformation). Just use get_dev() method. * fhandler_fifo.cc (fhandler_fifo::open) Use device ID and inode number to generate fifo name. * path.h (fs_info::sernum): New member. (fs_info::serial_number): New method. (path_conv::fs_serial_number): New method. * path.cc (fs_info::update): Fetch volume serial number and store in sernum.
2008-04-01 02:03:25 +08:00
status = NtQueryInformationFile (get_handle (), &io, &fsi, sizeof fsi,
FileStandardInformation);
if (!NT_SUCCESS (status))
{
__seterrno_from_nt_status (status);
return -1;
}
if (fl->l_start > 0 && fsi.EndOfFile.QuadPart > OFF_MAX - fl->l_start)
{
set_errno (EOVERFLOW);
return -1;
}
start = fsi.EndOfFile.QuadPart + fl->l_start;
}
break;
default:
return (EINVAL);
}
if (start < 0)
{
set_errno (EINVAL);
return -1;
}
if (fl->l_len < 0)
{
if (start == 0)
{
set_errno (EINVAL);
return -1;
}
end = start - 1;
start += fl->l_len;
if (start < 0)
{
set_errno (EINVAL);
return -1;
}
}
else if (fl->l_len == 0)
end = -1;
else
{
oadd = fl->l_len - 1;
if (oadd > OFF_MAX - start)
{
set_errno (EOVERFLOW);
return -1;
}
end = start + oadd;
}
restart: /* Entry point after a restartable signal came in. */
inode_t *node = inode_t::get (get_dev (), get_ino (), true, true);
if (!node)
{
* smallprint.cc (__small_vswprintf): Fix uninitialized usage of `w'. Revamp advisory file locking to avoid cross reference pointers as well as to allow BSD flock semantics. More agressively delete unused nodes and sync objects. * fhandler.h (fhandler_base::ino): Rename from namehash. Fix comment. (fhandler_base::node): Remove. (fhandler_base::unique_id): Add. (fhandler_base::del_my_locks): New method. (get_ino): Rename from get_namehash. Change usage throughout Cygwin. (get_unique_id): New method. * fhandler.cc (fhandler_base::close): Call own del_my_locks method. Fix comment. (fhandler_base::fhandler_base): Accommodate new and changed members. (fhandler_base::fixup_after_fork): Call del_my_locks. (fhandler_base::fixup_after_exec): Ditto for files with close-on-exec flag set. * fhandler_disk_file.cc (get_ino_by_handle): Rename from readdir_get_ino_by_handle. Accommodate throughout. (fhandler_base::open_fs): Fill ino with inode number if FS has good inodes. Allocate a LUID and store in unique_id to recognize file descriptors referencing the same file object. * flock.cc: Drop flock TODO comments. Use explicit types __dev32_t and __ino64_t instead of dev_t and ino_t. (LOCK_OBJ_NAME_LEN): Change to reflect longer lf_id length. (get_obj_handle_count): New method. (lockf_t::lf_id): Change type to long long. (inode_t::get_lock_obj_handle_count): Drop in favor of static function get_obj_handle_count. (inode_t::del_locks): Remove. (inode_t::get): Add create_if_missing flag argument. (inode_t::del_my_locks): Reimplement to handle POSIX and BSD flock locks. Return if node can be deleted or not. (inode_t::~inode_t): Ditto. Close handles to i_dir and i_mtx. (fixup_lockf_after_fork): Remove. (fhandler_base::del_my_locks): New method. (fixup_lockf_after_exec): Check if node can be deleted. (inode_t::get): Only create node if create_if_missing is set. Lock the returned node here before unlocking the node list. (inode_t::get_all_locks_list): Accommodate new lf_id length. (inode_t::create_lock_obj): Ditto. (lockf_t::open_lock_obj): Ditto. Change return type to bool. De-const. Set lf_obj instead of returning a handle. (lockf_t::del_lock_obj): Call SetEvent only if new incoming parameters allow it. Explain how it's supposed to work. (fhandler_disk_file::lock): Only fetch file length in SEEK_END case. Use NtQueryInformationFile(FileStandardInformation) instead of calling fstat_by_handle. Always unlock node before returning. Use fhandler's unique id to create lf_id for BSD flock locks. Rely on node lock from inode_t::get. Call del_lock_obj on removed locks here to allow explicit unlocking. Delete node if no lock exists on the file anymore. (lf_setlock): Get file handle as additional parameter. Handle the fact that lf_getblock now always opens the attached event object. Reactivate erroneously applied patch which deactivates setting thread priority. Additionally handle blocking on BSD flock locks. (lf_clearlock): Get file handle as additional parameter. (lf_getlock): Close event handle opened by lf_getblock. (lf_getblock): Open potentially blocking event object here and check its signal state if it's a BSD flock lock. (lf_wakelock): Get file handle as additional parameter. * fork.cc (frok::child): Drop call to fixup_lockf_after_fork. * ntdll.h (struct _EVENT_BASIC_INFORMATION): Define. (enum _EVENT_INFORMATION_CLASS): Define. (NtQueryEvent): Declare. * fhandler.h (fhandler_base::fs_flags): Remove. (fhandler_base::set_fs_flags): Remove. (fhandler_base::get_fs_flags): Remove. * fhandler.cc (fhandler_base::write): Check for sparse file using pc.fs_flags(). * fhandler_disk_file.cc (fhandler_disk_file::ftruncate): Ditto. The return of the volume serial number in fs_info. * fhandler.h (get_dev): New method. * fhandler_disk_file.cc (fhandler_base::fstat_by_handle): Drop call to NtQueryVolumeInformationFile(FileFsVolumeInformation). Just use get_dev() method. * fhandler_fifo.cc (fhandler_fifo::open) Use device ID and inode number to generate fifo name. * path.h (fs_info::sernum): New member. (fs_info::serial_number): New method. (path_conv::fs_serial_number): New method. * path.cc (fs_info::update): Fetch volume serial number and store in sernum.
2008-04-01 02:03:25 +08:00
set_errno (ENOLCK);
return -1;
}
* smallprint.cc (__small_vswprintf): Fix uninitialized usage of `w'. Revamp advisory file locking to avoid cross reference pointers as well as to allow BSD flock semantics. More agressively delete unused nodes and sync objects. * fhandler.h (fhandler_base::ino): Rename from namehash. Fix comment. (fhandler_base::node): Remove. (fhandler_base::unique_id): Add. (fhandler_base::del_my_locks): New method. (get_ino): Rename from get_namehash. Change usage throughout Cygwin. (get_unique_id): New method. * fhandler.cc (fhandler_base::close): Call own del_my_locks method. Fix comment. (fhandler_base::fhandler_base): Accommodate new and changed members. (fhandler_base::fixup_after_fork): Call del_my_locks. (fhandler_base::fixup_after_exec): Ditto for files with close-on-exec flag set. * fhandler_disk_file.cc (get_ino_by_handle): Rename from readdir_get_ino_by_handle. Accommodate throughout. (fhandler_base::open_fs): Fill ino with inode number if FS has good inodes. Allocate a LUID and store in unique_id to recognize file descriptors referencing the same file object. * flock.cc: Drop flock TODO comments. Use explicit types __dev32_t and __ino64_t instead of dev_t and ino_t. (LOCK_OBJ_NAME_LEN): Change to reflect longer lf_id length. (get_obj_handle_count): New method. (lockf_t::lf_id): Change type to long long. (inode_t::get_lock_obj_handle_count): Drop in favor of static function get_obj_handle_count. (inode_t::del_locks): Remove. (inode_t::get): Add create_if_missing flag argument. (inode_t::del_my_locks): Reimplement to handle POSIX and BSD flock locks. Return if node can be deleted or not. (inode_t::~inode_t): Ditto. Close handles to i_dir and i_mtx. (fixup_lockf_after_fork): Remove. (fhandler_base::del_my_locks): New method. (fixup_lockf_after_exec): Check if node can be deleted. (inode_t::get): Only create node if create_if_missing is set. Lock the returned node here before unlocking the node list. (inode_t::get_all_locks_list): Accommodate new lf_id length. (inode_t::create_lock_obj): Ditto. (lockf_t::open_lock_obj): Ditto. Change return type to bool. De-const. Set lf_obj instead of returning a handle. (lockf_t::del_lock_obj): Call SetEvent only if new incoming parameters allow it. Explain how it's supposed to work. (fhandler_disk_file::lock): Only fetch file length in SEEK_END case. Use NtQueryInformationFile(FileStandardInformation) instead of calling fstat_by_handle. Always unlock node before returning. Use fhandler's unique id to create lf_id for BSD flock locks. Rely on node lock from inode_t::get. Call del_lock_obj on removed locks here to allow explicit unlocking. Delete node if no lock exists on the file anymore. (lf_setlock): Get file handle as additional parameter. Handle the fact that lf_getblock now always opens the attached event object. Reactivate erroneously applied patch which deactivates setting thread priority. Additionally handle blocking on BSD flock locks. (lf_clearlock): Get file handle as additional parameter. (lf_getlock): Close event handle opened by lf_getblock. (lf_getblock): Open potentially blocking event object here and check its signal state if it's a BSD flock lock. (lf_wakelock): Get file handle as additional parameter. * fork.cc (frok::child): Drop call to fixup_lockf_after_fork. * ntdll.h (struct _EVENT_BASIC_INFORMATION): Define. (enum _EVENT_INFORMATION_CLASS): Define. (NtQueryEvent): Declare. * fhandler.h (fhandler_base::fs_flags): Remove. (fhandler_base::set_fs_flags): Remove. (fhandler_base::get_fs_flags): Remove. * fhandler.cc (fhandler_base::write): Check for sparse file using pc.fs_flags(). * fhandler_disk_file.cc (fhandler_disk_file::ftruncate): Ditto. The return of the volume serial number in fs_info. * fhandler.h (get_dev): New method. * fhandler_disk_file.cc (fhandler_base::fstat_by_handle): Drop call to NtQueryVolumeInformationFile(FileFsVolumeInformation). Just use get_dev() method. * fhandler_fifo.cc (fhandler_fifo::open) Use device ID and inode number to generate fifo name. * path.h (fs_info::sernum): New member. (fs_info::serial_number): New method. (path_conv::fs_serial_number): New method. * path.cc (fs_info::update): Fetch volume serial number and store in sernum.
2008-04-01 02:03:25 +08:00
/* Unlock the fd table which has been locked in fcntl_worker/lock_worker,
otherwise a blocking F_SETLKW never wakes up on a signal. */
cygheap->fdtab.unlock ();
lockf_t **head = &node->i_lockf;
#if 0
/*
* Avoid the common case of unlocking when inode_t has no locks.
*
* This shortcut is invalid for Cygwin because the above inode_t::get
* call returns with an empty lock list if this process has no locks
* on the file yet.
*/
if (*head == NULL)
{
if (a_op != F_SETLK)
{
* smallprint.cc (__small_vswprintf): Fix uninitialized usage of `w'. Revamp advisory file locking to avoid cross reference pointers as well as to allow BSD flock semantics. More agressively delete unused nodes and sync objects. * fhandler.h (fhandler_base::ino): Rename from namehash. Fix comment. (fhandler_base::node): Remove. (fhandler_base::unique_id): Add. (fhandler_base::del_my_locks): New method. (get_ino): Rename from get_namehash. Change usage throughout Cygwin. (get_unique_id): New method. * fhandler.cc (fhandler_base::close): Call own del_my_locks method. Fix comment. (fhandler_base::fhandler_base): Accommodate new and changed members. (fhandler_base::fixup_after_fork): Call del_my_locks. (fhandler_base::fixup_after_exec): Ditto for files with close-on-exec flag set. * fhandler_disk_file.cc (get_ino_by_handle): Rename from readdir_get_ino_by_handle. Accommodate throughout. (fhandler_base::open_fs): Fill ino with inode number if FS has good inodes. Allocate a LUID and store in unique_id to recognize file descriptors referencing the same file object. * flock.cc: Drop flock TODO comments. Use explicit types __dev32_t and __ino64_t instead of dev_t and ino_t. (LOCK_OBJ_NAME_LEN): Change to reflect longer lf_id length. (get_obj_handle_count): New method. (lockf_t::lf_id): Change type to long long. (inode_t::get_lock_obj_handle_count): Drop in favor of static function get_obj_handle_count. (inode_t::del_locks): Remove. (inode_t::get): Add create_if_missing flag argument. (inode_t::del_my_locks): Reimplement to handle POSIX and BSD flock locks. Return if node can be deleted or not. (inode_t::~inode_t): Ditto. Close handles to i_dir and i_mtx. (fixup_lockf_after_fork): Remove. (fhandler_base::del_my_locks): New method. (fixup_lockf_after_exec): Check if node can be deleted. (inode_t::get): Only create node if create_if_missing is set. Lock the returned node here before unlocking the node list. (inode_t::get_all_locks_list): Accommodate new lf_id length. (inode_t::create_lock_obj): Ditto. (lockf_t::open_lock_obj): Ditto. Change return type to bool. De-const. Set lf_obj instead of returning a handle. (lockf_t::del_lock_obj): Call SetEvent only if new incoming parameters allow it. Explain how it's supposed to work. (fhandler_disk_file::lock): Only fetch file length in SEEK_END case. Use NtQueryInformationFile(FileStandardInformation) instead of calling fstat_by_handle. Always unlock node before returning. Use fhandler's unique id to create lf_id for BSD flock locks. Rely on node lock from inode_t::get. Call del_lock_obj on removed locks here to allow explicit unlocking. Delete node if no lock exists on the file anymore. (lf_setlock): Get file handle as additional parameter. Handle the fact that lf_getblock now always opens the attached event object. Reactivate erroneously applied patch which deactivates setting thread priority. Additionally handle blocking on BSD flock locks. (lf_clearlock): Get file handle as additional parameter. (lf_getlock): Close event handle opened by lf_getblock. (lf_getblock): Open potentially blocking event object here and check its signal state if it's a BSD flock lock. (lf_wakelock): Get file handle as additional parameter. * fork.cc (frok::child): Drop call to fixup_lockf_after_fork. * ntdll.h (struct _EVENT_BASIC_INFORMATION): Define. (enum _EVENT_INFORMATION_CLASS): Define. (NtQueryEvent): Declare. * fhandler.h (fhandler_base::fs_flags): Remove. (fhandler_base::set_fs_flags): Remove. (fhandler_base::get_fs_flags): Remove. * fhandler.cc (fhandler_base::write): Check for sparse file using pc.fs_flags(). * fhandler_disk_file.cc (fhandler_disk_file::ftruncate): Ditto. The return of the volume serial number in fs_info. * fhandler.h (get_dev): New method. * fhandler_disk_file.cc (fhandler_base::fstat_by_handle): Drop call to NtQueryVolumeInformationFile(FileFsVolumeInformation). Just use get_dev() method. * fhandler_fifo.cc (fhandler_fifo::open) Use device ID and inode number to generate fifo name. * path.h (fs_info::sernum): New member. (fs_info::serial_number): New method. (path_conv::fs_serial_number): New method. * path.cc (fs_info::update): Fetch volume serial number and store in sernum.
2008-04-01 02:03:25 +08:00
node->UNLOCK ();
fl->l_type = F_UNLCK;
return 0;
}
}
#endif
/*
* Allocate a spare structure in case we have to split.
*/
lockf_t *clean = NULL;
if (a_op == F_SETLK || a_op == F_UNLCK)
{
clean = new lockf_t ();
if (!clean)
{
node->unlock_and_remove_if_unused ();
set_errno (ENOLCK);
return -1;
}
}
/*
* Create the lockf_t structure
*/
lockf_t *lock = new lockf_t (node, head, a_flags, type, start, end,
* smallprint.cc (__small_vswprintf): Fix uninitialized usage of `w'. Revamp advisory file locking to avoid cross reference pointers as well as to allow BSD flock semantics. More agressively delete unused nodes and sync objects. * fhandler.h (fhandler_base::ino): Rename from namehash. Fix comment. (fhandler_base::node): Remove. (fhandler_base::unique_id): Add. (fhandler_base::del_my_locks): New method. (get_ino): Rename from get_namehash. Change usage throughout Cygwin. (get_unique_id): New method. * fhandler.cc (fhandler_base::close): Call own del_my_locks method. Fix comment. (fhandler_base::fhandler_base): Accommodate new and changed members. (fhandler_base::fixup_after_fork): Call del_my_locks. (fhandler_base::fixup_after_exec): Ditto for files with close-on-exec flag set. * fhandler_disk_file.cc (get_ino_by_handle): Rename from readdir_get_ino_by_handle. Accommodate throughout. (fhandler_base::open_fs): Fill ino with inode number if FS has good inodes. Allocate a LUID and store in unique_id to recognize file descriptors referencing the same file object. * flock.cc: Drop flock TODO comments. Use explicit types __dev32_t and __ino64_t instead of dev_t and ino_t. (LOCK_OBJ_NAME_LEN): Change to reflect longer lf_id length. (get_obj_handle_count): New method. (lockf_t::lf_id): Change type to long long. (inode_t::get_lock_obj_handle_count): Drop in favor of static function get_obj_handle_count. (inode_t::del_locks): Remove. (inode_t::get): Add create_if_missing flag argument. (inode_t::del_my_locks): Reimplement to handle POSIX and BSD flock locks. Return if node can be deleted or not. (inode_t::~inode_t): Ditto. Close handles to i_dir and i_mtx. (fixup_lockf_after_fork): Remove. (fhandler_base::del_my_locks): New method. (fixup_lockf_after_exec): Check if node can be deleted. (inode_t::get): Only create node if create_if_missing is set. Lock the returned node here before unlocking the node list. (inode_t::get_all_locks_list): Accommodate new lf_id length. (inode_t::create_lock_obj): Ditto. (lockf_t::open_lock_obj): Ditto. Change return type to bool. De-const. Set lf_obj instead of returning a handle. (lockf_t::del_lock_obj): Call SetEvent only if new incoming parameters allow it. Explain how it's supposed to work. (fhandler_disk_file::lock): Only fetch file length in SEEK_END case. Use NtQueryInformationFile(FileStandardInformation) instead of calling fstat_by_handle. Always unlock node before returning. Use fhandler's unique id to create lf_id for BSD flock locks. Rely on node lock from inode_t::get. Call del_lock_obj on removed locks here to allow explicit unlocking. Delete node if no lock exists on the file anymore. (lf_setlock): Get file handle as additional parameter. Handle the fact that lf_getblock now always opens the attached event object. Reactivate erroneously applied patch which deactivates setting thread priority. Additionally handle blocking on BSD flock locks. (lf_clearlock): Get file handle as additional parameter. (lf_getlock): Close event handle opened by lf_getblock. (lf_getblock): Open potentially blocking event object here and check its signal state if it's a BSD flock lock. (lf_wakelock): Get file handle as additional parameter. * fork.cc (frok::child): Drop call to fixup_lockf_after_fork. * ntdll.h (struct _EVENT_BASIC_INFORMATION): Define. (enum _EVENT_INFORMATION_CLASS): Define. (NtQueryEvent): Declare. * fhandler.h (fhandler_base::fs_flags): Remove. (fhandler_base::set_fs_flags): Remove. (fhandler_base::get_fs_flags): Remove. * fhandler.cc (fhandler_base::write): Check for sparse file using pc.fs_flags(). * fhandler_disk_file.cc (fhandler_disk_file::ftruncate): Ditto. The return of the volume serial number in fs_info. * fhandler.h (get_dev): New method. * fhandler_disk_file.cc (fhandler_base::fstat_by_handle): Drop call to NtQueryVolumeInformationFile(FileFsVolumeInformation). Just use get_dev() method. * fhandler_fifo.cc (fhandler_fifo::open) Use device ID and inode number to generate fifo name. * path.h (fs_info::sernum): New member. (fs_info::serial_number): New method. (path_conv::fs_serial_number): New method. * path.cc (fs_info::update): Fetch volume serial number and store in sernum.
2008-04-01 02:03:25 +08:00
(a_flags & F_FLOCK) ? get_unique_id ()
: getpid (),
* flock.cc (LOCK_OBJ_NAME_LEN): Change to accommodate extra lf_ver field. (class lockf_t): Add lf_ver field. (lockf_t::lockf_t): Initialize lf_ver to 0. (class inode_t): Change i_wait to i_cnt. Change comment to explain change in usage. (inode_t:use): Rename from wait. Make private. (inode_t::unuse): Rename from unwait. Make private. (inode_t::inuse): Rename from waiting. Make private. (inode_t::notused): New public method to set use count to 0. (inode_t::unlock_and_remove): New method to unlock node and to delete it if it's unused in current process. (fhandler_base::del_my_locks): Drop global list lock. Drop variable no_locks_left. Simpify unlocking and removing node by just calling unlock_and_remove. (fixup_lockf_after_exec): Call notused method for each node. (inode_t::get): Call use method. Lock node only if outside of list lock. (inode_t::get_all_locks_list): Accommodate additional lf_ver field when creating lockf_t structure from object name. (lockf_t::create_lock_obj_attr): Accommodate additional lf_ver field when creating object name from lockf_t structure. Handle STATUS_OBJECT_NAME_COLLISION gracefully in F_POSIX case as well. Change comment accordingly. Increment lf_ver field rather than high byte of lf_wid field. Simplify comment. (fhandler_disk_file::lock): Always call unlock_and_remove rather than just UNLOCK on node. (lf_setlock): Move ret definition where it's used. Drop unneeded tests for obj being not NULL. Only check for deadlock condition if the lock we're trying to establish is a POSIX lock. Revamp object collecting and wait code to cover all cases. Don't return with EDEADLK if blocking process can't be opened for synchronization in F_POSIX case, rather just wait like in F_FLOCK case. Change system_printf to debug_printf in that case. Only run WaitForMultipleObjects with high priority. Close obj and process handles prior to locking node.
2011-08-29 21:50:25 +08:00
myself->dwProcessId, 0);
if (!lock)
{
node->unlock_and_remove_if_unused ();
set_errno (ENOLCK);
return -1;
}
switch (a_op)
{
case F_SETLK:
* smallprint.cc (__small_vswprintf): Fix uninitialized usage of `w'. Revamp advisory file locking to avoid cross reference pointers as well as to allow BSD flock semantics. More agressively delete unused nodes and sync objects. * fhandler.h (fhandler_base::ino): Rename from namehash. Fix comment. (fhandler_base::node): Remove. (fhandler_base::unique_id): Add. (fhandler_base::del_my_locks): New method. (get_ino): Rename from get_namehash. Change usage throughout Cygwin. (get_unique_id): New method. * fhandler.cc (fhandler_base::close): Call own del_my_locks method. Fix comment. (fhandler_base::fhandler_base): Accommodate new and changed members. (fhandler_base::fixup_after_fork): Call del_my_locks. (fhandler_base::fixup_after_exec): Ditto for files with close-on-exec flag set. * fhandler_disk_file.cc (get_ino_by_handle): Rename from readdir_get_ino_by_handle. Accommodate throughout. (fhandler_base::open_fs): Fill ino with inode number if FS has good inodes. Allocate a LUID and store in unique_id to recognize file descriptors referencing the same file object. * flock.cc: Drop flock TODO comments. Use explicit types __dev32_t and __ino64_t instead of dev_t and ino_t. (LOCK_OBJ_NAME_LEN): Change to reflect longer lf_id length. (get_obj_handle_count): New method. (lockf_t::lf_id): Change type to long long. (inode_t::get_lock_obj_handle_count): Drop in favor of static function get_obj_handle_count. (inode_t::del_locks): Remove. (inode_t::get): Add create_if_missing flag argument. (inode_t::del_my_locks): Reimplement to handle POSIX and BSD flock locks. Return if node can be deleted or not. (inode_t::~inode_t): Ditto. Close handles to i_dir and i_mtx. (fixup_lockf_after_fork): Remove. (fhandler_base::del_my_locks): New method. (fixup_lockf_after_exec): Check if node can be deleted. (inode_t::get): Only create node if create_if_missing is set. Lock the returned node here before unlocking the node list. (inode_t::get_all_locks_list): Accommodate new lf_id length. (inode_t::create_lock_obj): Ditto. (lockf_t::open_lock_obj): Ditto. Change return type to bool. De-const. Set lf_obj instead of returning a handle. (lockf_t::del_lock_obj): Call SetEvent only if new incoming parameters allow it. Explain how it's supposed to work. (fhandler_disk_file::lock): Only fetch file length in SEEK_END case. Use NtQueryInformationFile(FileStandardInformation) instead of calling fstat_by_handle. Always unlock node before returning. Use fhandler's unique id to create lf_id for BSD flock locks. Rely on node lock from inode_t::get. Call del_lock_obj on removed locks here to allow explicit unlocking. Delete node if no lock exists on the file anymore. (lf_setlock): Get file handle as additional parameter. Handle the fact that lf_getblock now always opens the attached event object. Reactivate erroneously applied patch which deactivates setting thread priority. Additionally handle blocking on BSD flock locks. (lf_clearlock): Get file handle as additional parameter. (lf_getlock): Close event handle opened by lf_getblock. (lf_getblock): Open potentially blocking event object here and check its signal state if it's a BSD flock lock. (lf_wakelock): Get file handle as additional parameter. * fork.cc (frok::child): Drop call to fixup_lockf_after_fork. * ntdll.h (struct _EVENT_BASIC_INFORMATION): Define. (enum _EVENT_INFORMATION_CLASS): Define. (NtQueryEvent): Declare. * fhandler.h (fhandler_base::fs_flags): Remove. (fhandler_base::set_fs_flags): Remove. (fhandler_base::get_fs_flags): Remove. * fhandler.cc (fhandler_base::write): Check for sparse file using pc.fs_flags(). * fhandler_disk_file.cc (fhandler_disk_file::ftruncate): Ditto. The return of the volume serial number in fs_info. * fhandler.h (get_dev): New method. * fhandler_disk_file.cc (fhandler_base::fstat_by_handle): Drop call to NtQueryVolumeInformationFile(FileFsVolumeInformation). Just use get_dev() method. * fhandler_fifo.cc (fhandler_fifo::open) Use device ID and inode number to generate fifo name. * path.h (fs_info::sernum): New member. (fs_info::serial_number): New method. (path_conv::fs_serial_number): New method. * path.cc (fs_info::update): Fetch volume serial number and store in sernum.
2008-04-01 02:03:25 +08:00
error = lf_setlock (lock, node, &clean, get_handle ());
break;
case F_UNLCK:
* smallprint.cc (__small_vswprintf): Fix uninitialized usage of `w'. Revamp advisory file locking to avoid cross reference pointers as well as to allow BSD flock semantics. More agressively delete unused nodes and sync objects. * fhandler.h (fhandler_base::ino): Rename from namehash. Fix comment. (fhandler_base::node): Remove. (fhandler_base::unique_id): Add. (fhandler_base::del_my_locks): New method. (get_ino): Rename from get_namehash. Change usage throughout Cygwin. (get_unique_id): New method. * fhandler.cc (fhandler_base::close): Call own del_my_locks method. Fix comment. (fhandler_base::fhandler_base): Accommodate new and changed members. (fhandler_base::fixup_after_fork): Call del_my_locks. (fhandler_base::fixup_after_exec): Ditto for files with close-on-exec flag set. * fhandler_disk_file.cc (get_ino_by_handle): Rename from readdir_get_ino_by_handle. Accommodate throughout. (fhandler_base::open_fs): Fill ino with inode number if FS has good inodes. Allocate a LUID and store in unique_id to recognize file descriptors referencing the same file object. * flock.cc: Drop flock TODO comments. Use explicit types __dev32_t and __ino64_t instead of dev_t and ino_t. (LOCK_OBJ_NAME_LEN): Change to reflect longer lf_id length. (get_obj_handle_count): New method. (lockf_t::lf_id): Change type to long long. (inode_t::get_lock_obj_handle_count): Drop in favor of static function get_obj_handle_count. (inode_t::del_locks): Remove. (inode_t::get): Add create_if_missing flag argument. (inode_t::del_my_locks): Reimplement to handle POSIX and BSD flock locks. Return if node can be deleted or not. (inode_t::~inode_t): Ditto. Close handles to i_dir and i_mtx. (fixup_lockf_after_fork): Remove. (fhandler_base::del_my_locks): New method. (fixup_lockf_after_exec): Check if node can be deleted. (inode_t::get): Only create node if create_if_missing is set. Lock the returned node here before unlocking the node list. (inode_t::get_all_locks_list): Accommodate new lf_id length. (inode_t::create_lock_obj): Ditto. (lockf_t::open_lock_obj): Ditto. Change return type to bool. De-const. Set lf_obj instead of returning a handle. (lockf_t::del_lock_obj): Call SetEvent only if new incoming parameters allow it. Explain how it's supposed to work. (fhandler_disk_file::lock): Only fetch file length in SEEK_END case. Use NtQueryInformationFile(FileStandardInformation) instead of calling fstat_by_handle. Always unlock node before returning. Use fhandler's unique id to create lf_id for BSD flock locks. Rely on node lock from inode_t::get. Call del_lock_obj on removed locks here to allow explicit unlocking. Delete node if no lock exists on the file anymore. (lf_setlock): Get file handle as additional parameter. Handle the fact that lf_getblock now always opens the attached event object. Reactivate erroneously applied patch which deactivates setting thread priority. Additionally handle blocking on BSD flock locks. (lf_clearlock): Get file handle as additional parameter. (lf_getlock): Close event handle opened by lf_getblock. (lf_getblock): Open potentially blocking event object here and check its signal state if it's a BSD flock lock. (lf_wakelock): Get file handle as additional parameter. * fork.cc (frok::child): Drop call to fixup_lockf_after_fork. * ntdll.h (struct _EVENT_BASIC_INFORMATION): Define. (enum _EVENT_INFORMATION_CLASS): Define. (NtQueryEvent): Declare. * fhandler.h (fhandler_base::fs_flags): Remove. (fhandler_base::set_fs_flags): Remove. (fhandler_base::get_fs_flags): Remove. * fhandler.cc (fhandler_base::write): Check for sparse file using pc.fs_flags(). * fhandler_disk_file.cc (fhandler_disk_file::ftruncate): Ditto. The return of the volume serial number in fs_info. * fhandler.h (get_dev): New method. * fhandler_disk_file.cc (fhandler_base::fstat_by_handle): Drop call to NtQueryVolumeInformationFile(FileFsVolumeInformation). Just use get_dev() method. * fhandler_fifo.cc (fhandler_fifo::open) Use device ID and inode number to generate fifo name. * path.h (fs_info::sernum): New member. (fs_info::serial_number): New method. (path_conv::fs_serial_number): New method. * path.cc (fs_info::update): Fetch volume serial number and store in sernum.
2008-04-01 02:03:25 +08:00
error = lf_clearlock (lock, &clean, get_handle ());
lock->lf_next = clean;
clean = lock;
break;
case F_GETLK:
error = lf_getlock (lock, node, fl);
lock->lf_next = clean;
clean = lock;
break;
default:
lock->lf_next = clean;
clean = lock;
error = EINVAL;
break;
}
for (lock = clean; lock != NULL; )
{
lockf_t *n = lock->lf_next;
* smallprint.cc (__small_vswprintf): Fix uninitialized usage of `w'. Revamp advisory file locking to avoid cross reference pointers as well as to allow BSD flock semantics. More agressively delete unused nodes and sync objects. * fhandler.h (fhandler_base::ino): Rename from namehash. Fix comment. (fhandler_base::node): Remove. (fhandler_base::unique_id): Add. (fhandler_base::del_my_locks): New method. (get_ino): Rename from get_namehash. Change usage throughout Cygwin. (get_unique_id): New method. * fhandler.cc (fhandler_base::close): Call own del_my_locks method. Fix comment. (fhandler_base::fhandler_base): Accommodate new and changed members. (fhandler_base::fixup_after_fork): Call del_my_locks. (fhandler_base::fixup_after_exec): Ditto for files with close-on-exec flag set. * fhandler_disk_file.cc (get_ino_by_handle): Rename from readdir_get_ino_by_handle. Accommodate throughout. (fhandler_base::open_fs): Fill ino with inode number if FS has good inodes. Allocate a LUID and store in unique_id to recognize file descriptors referencing the same file object. * flock.cc: Drop flock TODO comments. Use explicit types __dev32_t and __ino64_t instead of dev_t and ino_t. (LOCK_OBJ_NAME_LEN): Change to reflect longer lf_id length. (get_obj_handle_count): New method. (lockf_t::lf_id): Change type to long long. (inode_t::get_lock_obj_handle_count): Drop in favor of static function get_obj_handle_count. (inode_t::del_locks): Remove. (inode_t::get): Add create_if_missing flag argument. (inode_t::del_my_locks): Reimplement to handle POSIX and BSD flock locks. Return if node can be deleted or not. (inode_t::~inode_t): Ditto. Close handles to i_dir and i_mtx. (fixup_lockf_after_fork): Remove. (fhandler_base::del_my_locks): New method. (fixup_lockf_after_exec): Check if node can be deleted. (inode_t::get): Only create node if create_if_missing is set. Lock the returned node here before unlocking the node list. (inode_t::get_all_locks_list): Accommodate new lf_id length. (inode_t::create_lock_obj): Ditto. (lockf_t::open_lock_obj): Ditto. Change return type to bool. De-const. Set lf_obj instead of returning a handle. (lockf_t::del_lock_obj): Call SetEvent only if new incoming parameters allow it. Explain how it's supposed to work. (fhandler_disk_file::lock): Only fetch file length in SEEK_END case. Use NtQueryInformationFile(FileStandardInformation) instead of calling fstat_by_handle. Always unlock node before returning. Use fhandler's unique id to create lf_id for BSD flock locks. Rely on node lock from inode_t::get. Call del_lock_obj on removed locks here to allow explicit unlocking. Delete node if no lock exists on the file anymore. (lf_setlock): Get file handle as additional parameter. Handle the fact that lf_getblock now always opens the attached event object. Reactivate erroneously applied patch which deactivates setting thread priority. Additionally handle blocking on BSD flock locks. (lf_clearlock): Get file handle as additional parameter. (lf_getlock): Close event handle opened by lf_getblock. (lf_getblock): Open potentially blocking event object here and check its signal state if it's a BSD flock lock. (lf_wakelock): Get file handle as additional parameter. * fork.cc (frok::child): Drop call to fixup_lockf_after_fork. * ntdll.h (struct _EVENT_BASIC_INFORMATION): Define. (enum _EVENT_INFORMATION_CLASS): Define. (NtQueryEvent): Declare. * fhandler.h (fhandler_base::fs_flags): Remove. (fhandler_base::set_fs_flags): Remove. (fhandler_base::get_fs_flags): Remove. * fhandler.cc (fhandler_base::write): Check for sparse file using pc.fs_flags(). * fhandler_disk_file.cc (fhandler_disk_file::ftruncate): Ditto. The return of the volume serial number in fs_info. * fhandler.h (get_dev): New method. * fhandler_disk_file.cc (fhandler_base::fstat_by_handle): Drop call to NtQueryVolumeInformationFile(FileFsVolumeInformation). Just use get_dev() method. * fhandler_fifo.cc (fhandler_fifo::open) Use device ID and inode number to generate fifo name. * path.h (fs_info::sernum): New member. (fs_info::serial_number): New method. (path_conv::fs_serial_number): New method. * path.cc (fs_info::update): Fetch volume serial number and store in sernum.
2008-04-01 02:03:25 +08:00
lock->del_lock_obj (get_handle (), a_op == F_UNLCK);
delete lock;
lock = n;
}
node->unlock_and_remove_if_unused ();
switch (error)
{
case 0: /* All is well. */
need_fork_fixup (true);
return 0;
case EINTR: /* Signal came in. */
if (_my_tls.call_signal_handler ())
goto restart;
break;
case ECANCELED: /* The thread has been sent a cancellation request. */
pthread::static_cancel_self ();
/*NOTREACHED*/
default:
break;
}
set_errno (error);
return -1;
}
/*
* Set a byte-range lock.
*/
static int
* smallprint.cc (__small_vswprintf): Fix uninitialized usage of `w'. Revamp advisory file locking to avoid cross reference pointers as well as to allow BSD flock semantics. More agressively delete unused nodes and sync objects. * fhandler.h (fhandler_base::ino): Rename from namehash. Fix comment. (fhandler_base::node): Remove. (fhandler_base::unique_id): Add. (fhandler_base::del_my_locks): New method. (get_ino): Rename from get_namehash. Change usage throughout Cygwin. (get_unique_id): New method. * fhandler.cc (fhandler_base::close): Call own del_my_locks method. Fix comment. (fhandler_base::fhandler_base): Accommodate new and changed members. (fhandler_base::fixup_after_fork): Call del_my_locks. (fhandler_base::fixup_after_exec): Ditto for files with close-on-exec flag set. * fhandler_disk_file.cc (get_ino_by_handle): Rename from readdir_get_ino_by_handle. Accommodate throughout. (fhandler_base::open_fs): Fill ino with inode number if FS has good inodes. Allocate a LUID and store in unique_id to recognize file descriptors referencing the same file object. * flock.cc: Drop flock TODO comments. Use explicit types __dev32_t and __ino64_t instead of dev_t and ino_t. (LOCK_OBJ_NAME_LEN): Change to reflect longer lf_id length. (get_obj_handle_count): New method. (lockf_t::lf_id): Change type to long long. (inode_t::get_lock_obj_handle_count): Drop in favor of static function get_obj_handle_count. (inode_t::del_locks): Remove. (inode_t::get): Add create_if_missing flag argument. (inode_t::del_my_locks): Reimplement to handle POSIX and BSD flock locks. Return if node can be deleted or not. (inode_t::~inode_t): Ditto. Close handles to i_dir and i_mtx. (fixup_lockf_after_fork): Remove. (fhandler_base::del_my_locks): New method. (fixup_lockf_after_exec): Check if node can be deleted. (inode_t::get): Only create node if create_if_missing is set. Lock the returned node here before unlocking the node list. (inode_t::get_all_locks_list): Accommodate new lf_id length. (inode_t::create_lock_obj): Ditto. (lockf_t::open_lock_obj): Ditto. Change return type to bool. De-const. Set lf_obj instead of returning a handle. (lockf_t::del_lock_obj): Call SetEvent only if new incoming parameters allow it. Explain how it's supposed to work. (fhandler_disk_file::lock): Only fetch file length in SEEK_END case. Use NtQueryInformationFile(FileStandardInformation) instead of calling fstat_by_handle. Always unlock node before returning. Use fhandler's unique id to create lf_id for BSD flock locks. Rely on node lock from inode_t::get. Call del_lock_obj on removed locks here to allow explicit unlocking. Delete node if no lock exists on the file anymore. (lf_setlock): Get file handle as additional parameter. Handle the fact that lf_getblock now always opens the attached event object. Reactivate erroneously applied patch which deactivates setting thread priority. Additionally handle blocking on BSD flock locks. (lf_clearlock): Get file handle as additional parameter. (lf_getlock): Close event handle opened by lf_getblock. (lf_getblock): Open potentially blocking event object here and check its signal state if it's a BSD flock lock. (lf_wakelock): Get file handle as additional parameter. * fork.cc (frok::child): Drop call to fixup_lockf_after_fork. * ntdll.h (struct _EVENT_BASIC_INFORMATION): Define. (enum _EVENT_INFORMATION_CLASS): Define. (NtQueryEvent): Declare. * fhandler.h (fhandler_base::fs_flags): Remove. (fhandler_base::set_fs_flags): Remove. (fhandler_base::get_fs_flags): Remove. * fhandler.cc (fhandler_base::write): Check for sparse file using pc.fs_flags(). * fhandler_disk_file.cc (fhandler_disk_file::ftruncate): Ditto. The return of the volume serial number in fs_info. * fhandler.h (get_dev): New method. * fhandler_disk_file.cc (fhandler_base::fstat_by_handle): Drop call to NtQueryVolumeInformationFile(FileFsVolumeInformation). Just use get_dev() method. * fhandler_fifo.cc (fhandler_fifo::open) Use device ID and inode number to generate fifo name. * path.h (fs_info::sernum): New member. (fs_info::serial_number): New method. (path_conv::fs_serial_number): New method. * path.cc (fs_info::update): Fetch volume serial number and store in sernum.
2008-04-01 02:03:25 +08:00
lf_setlock (lockf_t *lock, inode_t *node, lockf_t **clean, HANDLE fhdl)
{
lockf_t *block;
lockf_t **head = lock->lf_head;
lockf_t **prev, *overlap;
int ovcase, priority, old_prio, needtolink;
tmp_pathbuf tp;
/*
* Set the priority
*/
priority = old_prio = GetThreadPriority (GetCurrentThread ());
if (lock->lf_type == F_WRLCK && priority <= THREAD_PRIORITY_ABOVE_NORMAL)
priority = THREAD_PRIORITY_HIGHEST;
/*
* Scan lock list for this file looking for locks that would block us.
*/
/* Create temporary space for the all locks list. */
node->i_all_lf = (lockf_t *) (void *) tp.w_get ();
while ((block = lf_getblock(lock, node)))
{
* smallprint.cc (__small_vswprintf): Fix uninitialized usage of `w'. Revamp advisory file locking to avoid cross reference pointers as well as to allow BSD flock semantics. More agressively delete unused nodes and sync objects. * fhandler.h (fhandler_base::ino): Rename from namehash. Fix comment. (fhandler_base::node): Remove. (fhandler_base::unique_id): Add. (fhandler_base::del_my_locks): New method. (get_ino): Rename from get_namehash. Change usage throughout Cygwin. (get_unique_id): New method. * fhandler.cc (fhandler_base::close): Call own del_my_locks method. Fix comment. (fhandler_base::fhandler_base): Accommodate new and changed members. (fhandler_base::fixup_after_fork): Call del_my_locks. (fhandler_base::fixup_after_exec): Ditto for files with close-on-exec flag set. * fhandler_disk_file.cc (get_ino_by_handle): Rename from readdir_get_ino_by_handle. Accommodate throughout. (fhandler_base::open_fs): Fill ino with inode number if FS has good inodes. Allocate a LUID and store in unique_id to recognize file descriptors referencing the same file object. * flock.cc: Drop flock TODO comments. Use explicit types __dev32_t and __ino64_t instead of dev_t and ino_t. (LOCK_OBJ_NAME_LEN): Change to reflect longer lf_id length. (get_obj_handle_count): New method. (lockf_t::lf_id): Change type to long long. (inode_t::get_lock_obj_handle_count): Drop in favor of static function get_obj_handle_count. (inode_t::del_locks): Remove. (inode_t::get): Add create_if_missing flag argument. (inode_t::del_my_locks): Reimplement to handle POSIX and BSD flock locks. Return if node can be deleted or not. (inode_t::~inode_t): Ditto. Close handles to i_dir and i_mtx. (fixup_lockf_after_fork): Remove. (fhandler_base::del_my_locks): New method. (fixup_lockf_after_exec): Check if node can be deleted. (inode_t::get): Only create node if create_if_missing is set. Lock the returned node here before unlocking the node list. (inode_t::get_all_locks_list): Accommodate new lf_id length. (inode_t::create_lock_obj): Ditto. (lockf_t::open_lock_obj): Ditto. Change return type to bool. De-const. Set lf_obj instead of returning a handle. (lockf_t::del_lock_obj): Call SetEvent only if new incoming parameters allow it. Explain how it's supposed to work. (fhandler_disk_file::lock): Only fetch file length in SEEK_END case. Use NtQueryInformationFile(FileStandardInformation) instead of calling fstat_by_handle. Always unlock node before returning. Use fhandler's unique id to create lf_id for BSD flock locks. Rely on node lock from inode_t::get. Call del_lock_obj on removed locks here to allow explicit unlocking. Delete node if no lock exists on the file anymore. (lf_setlock): Get file handle as additional parameter. Handle the fact that lf_getblock now always opens the attached event object. Reactivate erroneously applied patch which deactivates setting thread priority. Additionally handle blocking on BSD flock locks. (lf_clearlock): Get file handle as additional parameter. (lf_getlock): Close event handle opened by lf_getblock. (lf_getblock): Open potentially blocking event object here and check its signal state if it's a BSD flock lock. (lf_wakelock): Get file handle as additional parameter. * fork.cc (frok::child): Drop call to fixup_lockf_after_fork. * ntdll.h (struct _EVENT_BASIC_INFORMATION): Define. (enum _EVENT_INFORMATION_CLASS): Define. (NtQueryEvent): Declare. * fhandler.h (fhandler_base::fs_flags): Remove. (fhandler_base::set_fs_flags): Remove. (fhandler_base::get_fs_flags): Remove. * fhandler.cc (fhandler_base::write): Check for sparse file using pc.fs_flags(). * fhandler_disk_file.cc (fhandler_disk_file::ftruncate): Ditto. The return of the volume serial number in fs_info. * fhandler.h (get_dev): New method. * fhandler_disk_file.cc (fhandler_base::fstat_by_handle): Drop call to NtQueryVolumeInformationFile(FileFsVolumeInformation). Just use get_dev() method. * fhandler_fifo.cc (fhandler_fifo::open) Use device ID and inode number to generate fifo name. * path.h (fs_info::sernum): New member. (fs_info::serial_number): New method. (path_conv::fs_serial_number): New method. * path.cc (fs_info::update): Fetch volume serial number and store in sernum.
2008-04-01 02:03:25 +08:00
HANDLE obj = block->lf_obj;
block->lf_obj = NULL;
/*
* Free the structure and return if nonblocking.
*/
if ((lock->lf_flags & F_WAIT) == 0)
{
* flock.cc (LOCK_OBJ_NAME_LEN): Change to accommodate extra lf_ver field. (class lockf_t): Add lf_ver field. (lockf_t::lockf_t): Initialize lf_ver to 0. (class inode_t): Change i_wait to i_cnt. Change comment to explain change in usage. (inode_t:use): Rename from wait. Make private. (inode_t::unuse): Rename from unwait. Make private. (inode_t::inuse): Rename from waiting. Make private. (inode_t::notused): New public method to set use count to 0. (inode_t::unlock_and_remove): New method to unlock node and to delete it if it's unused in current process. (fhandler_base::del_my_locks): Drop global list lock. Drop variable no_locks_left. Simpify unlocking and removing node by just calling unlock_and_remove. (fixup_lockf_after_exec): Call notused method for each node. (inode_t::get): Call use method. Lock node only if outside of list lock. (inode_t::get_all_locks_list): Accommodate additional lf_ver field when creating lockf_t structure from object name. (lockf_t::create_lock_obj_attr): Accommodate additional lf_ver field when creating object name from lockf_t structure. Handle STATUS_OBJECT_NAME_COLLISION gracefully in F_POSIX case as well. Change comment accordingly. Increment lf_ver field rather than high byte of lf_wid field. Simplify comment. (fhandler_disk_file::lock): Always call unlock_and_remove rather than just UNLOCK on node. (lf_setlock): Move ret definition where it's used. Drop unneeded tests for obj being not NULL. Only check for deadlock condition if the lock we're trying to establish is a POSIX lock. Revamp object collecting and wait code to cover all cases. Don't return with EDEADLK if blocking process can't be opened for synchronization in F_POSIX case, rather just wait like in F_FLOCK case. Change system_printf to debug_printf in that case. Only run WaitForMultipleObjects with high priority. Close obj and process handles prior to locking node.
2011-08-29 21:50:25 +08:00
NtClose (obj);
lock->lf_next = *clean;
*clean = lock;
return EAGAIN;
}
/*
* We are blocked. Since flock style locks cover
* the whole file, there is no chance for deadlock.
* For byte-range locks we must check for deadlock.
*
* Deadlock detection is done by looking through the
* wait channels to see if there are any cycles that
* involve us. MAXDEPTH is set just to make sure we
* do not go off into neverland.
*/
/* FIXME: We check the handle count of all the lock event objects
this process holds. If it's > 1, another process is
waiting for one of our locks. This method isn't overly
intelligent. If it turns out to be too dumb, we might
have to remove it or to find another method. */
* flock.cc (LOCK_OBJ_NAME_LEN): Change to accommodate extra lf_ver field. (class lockf_t): Add lf_ver field. (lockf_t::lockf_t): Initialize lf_ver to 0. (class inode_t): Change i_wait to i_cnt. Change comment to explain change in usage. (inode_t:use): Rename from wait. Make private. (inode_t::unuse): Rename from unwait. Make private. (inode_t::inuse): Rename from waiting. Make private. (inode_t::notused): New public method to set use count to 0. (inode_t::unlock_and_remove): New method to unlock node and to delete it if it's unused in current process. (fhandler_base::del_my_locks): Drop global list lock. Drop variable no_locks_left. Simpify unlocking and removing node by just calling unlock_and_remove. (fixup_lockf_after_exec): Call notused method for each node. (inode_t::get): Call use method. Lock node only if outside of list lock. (inode_t::get_all_locks_list): Accommodate additional lf_ver field when creating lockf_t structure from object name. (lockf_t::create_lock_obj_attr): Accommodate additional lf_ver field when creating object name from lockf_t structure. Handle STATUS_OBJECT_NAME_COLLISION gracefully in F_POSIX case as well. Change comment accordingly. Increment lf_ver field rather than high byte of lf_wid field. Simplify comment. (fhandler_disk_file::lock): Always call unlock_and_remove rather than just UNLOCK on node. (lf_setlock): Move ret definition where it's used. Drop unneeded tests for obj being not NULL. Only check for deadlock condition if the lock we're trying to establish is a POSIX lock. Revamp object collecting and wait code to cover all cases. Don't return with EDEADLK if blocking process can't be opened for synchronization in F_POSIX case, rather just wait like in F_FLOCK case. Change system_printf to debug_printf in that case. Only run WaitForMultipleObjects with high priority. Close obj and process handles prior to locking node.
2011-08-29 21:50:25 +08:00
if (lock->lf_flags & F_POSIX)
for (lockf_t *lk = node->i_lockf; lk; lk = lk->lf_next)
if ((lk->lf_flags & F_POSIX) && get_obj_handle_count (lk->lf_obj) > 1)
{
* smallprint.cc (__small_vswprintf): Fix uninitialized usage of `w'. Revamp advisory file locking to avoid cross reference pointers as well as to allow BSD flock semantics. More agressively delete unused nodes and sync objects. * fhandler.h (fhandler_base::ino): Rename from namehash. Fix comment. (fhandler_base::node): Remove. (fhandler_base::unique_id): Add. (fhandler_base::del_my_locks): New method. (get_ino): Rename from get_namehash. Change usage throughout Cygwin. (get_unique_id): New method. * fhandler.cc (fhandler_base::close): Call own del_my_locks method. Fix comment. (fhandler_base::fhandler_base): Accommodate new and changed members. (fhandler_base::fixup_after_fork): Call del_my_locks. (fhandler_base::fixup_after_exec): Ditto for files with close-on-exec flag set. * fhandler_disk_file.cc (get_ino_by_handle): Rename from readdir_get_ino_by_handle. Accommodate throughout. (fhandler_base::open_fs): Fill ino with inode number if FS has good inodes. Allocate a LUID and store in unique_id to recognize file descriptors referencing the same file object. * flock.cc: Drop flock TODO comments. Use explicit types __dev32_t and __ino64_t instead of dev_t and ino_t. (LOCK_OBJ_NAME_LEN): Change to reflect longer lf_id length. (get_obj_handle_count): New method. (lockf_t::lf_id): Change type to long long. (inode_t::get_lock_obj_handle_count): Drop in favor of static function get_obj_handle_count. (inode_t::del_locks): Remove. (inode_t::get): Add create_if_missing flag argument. (inode_t::del_my_locks): Reimplement to handle POSIX and BSD flock locks. Return if node can be deleted or not. (inode_t::~inode_t): Ditto. Close handles to i_dir and i_mtx. (fixup_lockf_after_fork): Remove. (fhandler_base::del_my_locks): New method. (fixup_lockf_after_exec): Check if node can be deleted. (inode_t::get): Only create node if create_if_missing is set. Lock the returned node here before unlocking the node list. (inode_t::get_all_locks_list): Accommodate new lf_id length. (inode_t::create_lock_obj): Ditto. (lockf_t::open_lock_obj): Ditto. Change return type to bool. De-const. Set lf_obj instead of returning a handle. (lockf_t::del_lock_obj): Call SetEvent only if new incoming parameters allow it. Explain how it's supposed to work. (fhandler_disk_file::lock): Only fetch file length in SEEK_END case. Use NtQueryInformationFile(FileStandardInformation) instead of calling fstat_by_handle. Always unlock node before returning. Use fhandler's unique id to create lf_id for BSD flock locks. Rely on node lock from inode_t::get. Call del_lock_obj on removed locks here to allow explicit unlocking. Delete node if no lock exists on the file anymore. (lf_setlock): Get file handle as additional parameter. Handle the fact that lf_getblock now always opens the attached event object. Reactivate erroneously applied patch which deactivates setting thread priority. Additionally handle blocking on BSD flock locks. (lf_clearlock): Get file handle as additional parameter. (lf_getlock): Close event handle opened by lf_getblock. (lf_getblock): Open potentially blocking event object here and check its signal state if it's a BSD flock lock. (lf_wakelock): Get file handle as additional parameter. * fork.cc (frok::child): Drop call to fixup_lockf_after_fork. * ntdll.h (struct _EVENT_BASIC_INFORMATION): Define. (enum _EVENT_INFORMATION_CLASS): Define. (NtQueryEvent): Declare. * fhandler.h (fhandler_base::fs_flags): Remove. (fhandler_base::set_fs_flags): Remove. (fhandler_base::get_fs_flags): Remove. * fhandler.cc (fhandler_base::write): Check for sparse file using pc.fs_flags(). * fhandler_disk_file.cc (fhandler_disk_file::ftruncate): Ditto. The return of the volume serial number in fs_info. * fhandler.h (get_dev): New method. * fhandler_disk_file.cc (fhandler_base::fstat_by_handle): Drop call to NtQueryVolumeInformationFile(FileFsVolumeInformation). Just use get_dev() method. * fhandler_fifo.cc (fhandler_fifo::open) Use device ID and inode number to generate fifo name. * path.h (fs_info::sernum): New member. (fs_info::serial_number): New method. (path_conv::fs_serial_number): New method. * path.cc (fs_info::update): Fetch volume serial number and store in sernum.
2008-04-01 02:03:25 +08:00
NtClose (obj);
* flock.cc (LOCK_OBJ_NAME_LEN): Change to accommodate extra lf_ver field. (class lockf_t): Add lf_ver field. (lockf_t::lockf_t): Initialize lf_ver to 0. (class inode_t): Change i_wait to i_cnt. Change comment to explain change in usage. (inode_t:use): Rename from wait. Make private. (inode_t::unuse): Rename from unwait. Make private. (inode_t::inuse): Rename from waiting. Make private. (inode_t::notused): New public method to set use count to 0. (inode_t::unlock_and_remove): New method to unlock node and to delete it if it's unused in current process. (fhandler_base::del_my_locks): Drop global list lock. Drop variable no_locks_left. Simpify unlocking and removing node by just calling unlock_and_remove. (fixup_lockf_after_exec): Call notused method for each node. (inode_t::get): Call use method. Lock node only if outside of list lock. (inode_t::get_all_locks_list): Accommodate additional lf_ver field when creating lockf_t structure from object name. (lockf_t::create_lock_obj_attr): Accommodate additional lf_ver field when creating object name from lockf_t structure. Handle STATUS_OBJECT_NAME_COLLISION gracefully in F_POSIX case as well. Change comment accordingly. Increment lf_ver field rather than high byte of lf_wid field. Simplify comment. (fhandler_disk_file::lock): Always call unlock_and_remove rather than just UNLOCK on node. (lf_setlock): Move ret definition where it's used. Drop unneeded tests for obj being not NULL. Only check for deadlock condition if the lock we're trying to establish is a POSIX lock. Revamp object collecting and wait code to cover all cases. Don't return with EDEADLK if blocking process can't be opened for synchronization in F_POSIX case, rather just wait like in F_FLOCK case. Change system_printf to debug_printf in that case. Only run WaitForMultipleObjects with high priority. Close obj and process handles prior to locking node.
2011-08-29 21:50:25 +08:00
return EDEADLK;
}
/*
* For flock type locks, we must first remove
* any shared locks that we hold before we sleep
* waiting for an exclusive lock.
*/
if ((lock->lf_flags & F_FLOCK) && lock->lf_type == F_WRLCK)
{
lock->lf_type = F_UNLCK;
* smallprint.cc (__small_vswprintf): Fix uninitialized usage of `w'. Revamp advisory file locking to avoid cross reference pointers as well as to allow BSD flock semantics. More agressively delete unused nodes and sync objects. * fhandler.h (fhandler_base::ino): Rename from namehash. Fix comment. (fhandler_base::node): Remove. (fhandler_base::unique_id): Add. (fhandler_base::del_my_locks): New method. (get_ino): Rename from get_namehash. Change usage throughout Cygwin. (get_unique_id): New method. * fhandler.cc (fhandler_base::close): Call own del_my_locks method. Fix comment. (fhandler_base::fhandler_base): Accommodate new and changed members. (fhandler_base::fixup_after_fork): Call del_my_locks. (fhandler_base::fixup_after_exec): Ditto for files with close-on-exec flag set. * fhandler_disk_file.cc (get_ino_by_handle): Rename from readdir_get_ino_by_handle. Accommodate throughout. (fhandler_base::open_fs): Fill ino with inode number if FS has good inodes. Allocate a LUID and store in unique_id to recognize file descriptors referencing the same file object. * flock.cc: Drop flock TODO comments. Use explicit types __dev32_t and __ino64_t instead of dev_t and ino_t. (LOCK_OBJ_NAME_LEN): Change to reflect longer lf_id length. (get_obj_handle_count): New method. (lockf_t::lf_id): Change type to long long. (inode_t::get_lock_obj_handle_count): Drop in favor of static function get_obj_handle_count. (inode_t::del_locks): Remove. (inode_t::get): Add create_if_missing flag argument. (inode_t::del_my_locks): Reimplement to handle POSIX and BSD flock locks. Return if node can be deleted or not. (inode_t::~inode_t): Ditto. Close handles to i_dir and i_mtx. (fixup_lockf_after_fork): Remove. (fhandler_base::del_my_locks): New method. (fixup_lockf_after_exec): Check if node can be deleted. (inode_t::get): Only create node if create_if_missing is set. Lock the returned node here before unlocking the node list. (inode_t::get_all_locks_list): Accommodate new lf_id length. (inode_t::create_lock_obj): Ditto. (lockf_t::open_lock_obj): Ditto. Change return type to bool. De-const. Set lf_obj instead of returning a handle. (lockf_t::del_lock_obj): Call SetEvent only if new incoming parameters allow it. Explain how it's supposed to work. (fhandler_disk_file::lock): Only fetch file length in SEEK_END case. Use NtQueryInformationFile(FileStandardInformation) instead of calling fstat_by_handle. Always unlock node before returning. Use fhandler's unique id to create lf_id for BSD flock locks. Rely on node lock from inode_t::get. Call del_lock_obj on removed locks here to allow explicit unlocking. Delete node if no lock exists on the file anymore. (lf_setlock): Get file handle as additional parameter. Handle the fact that lf_getblock now always opens the attached event object. Reactivate erroneously applied patch which deactivates setting thread priority. Additionally handle blocking on BSD flock locks. (lf_clearlock): Get file handle as additional parameter. (lf_getlock): Close event handle opened by lf_getblock. (lf_getblock): Open potentially blocking event object here and check its signal state if it's a BSD flock lock. (lf_wakelock): Get file handle as additional parameter. * fork.cc (frok::child): Drop call to fixup_lockf_after_fork. * ntdll.h (struct _EVENT_BASIC_INFORMATION): Define. (enum _EVENT_INFORMATION_CLASS): Define. (NtQueryEvent): Declare. * fhandler.h (fhandler_base::fs_flags): Remove. (fhandler_base::set_fs_flags): Remove. (fhandler_base::get_fs_flags): Remove. * fhandler.cc (fhandler_base::write): Check for sparse file using pc.fs_flags(). * fhandler_disk_file.cc (fhandler_disk_file::ftruncate): Ditto. The return of the volume serial number in fs_info. * fhandler.h (get_dev): New method. * fhandler_disk_file.cc (fhandler_base::fstat_by_handle): Drop call to NtQueryVolumeInformationFile(FileFsVolumeInformation). Just use get_dev() method. * fhandler_fifo.cc (fhandler_fifo::open) Use device ID and inode number to generate fifo name. * path.h (fs_info::sernum): New member. (fs_info::serial_number): New method. (path_conv::fs_serial_number): New method. * path.cc (fs_info::update): Fetch volume serial number and store in sernum.
2008-04-01 02:03:25 +08:00
(void) lf_clearlock (lock, clean, fhdl);
lock->lf_type = F_WRLCK;
}
/*
* Add our lock to the blocked list and sleep until we're free.
* Remember who blocked us (for deadlock detection).
*/
* smallprint.cc (__small_vswprintf): Fix uninitialized usage of `w'. Revamp advisory file locking to avoid cross reference pointers as well as to allow BSD flock semantics. More agressively delete unused nodes and sync objects. * fhandler.h (fhandler_base::ino): Rename from namehash. Fix comment. (fhandler_base::node): Remove. (fhandler_base::unique_id): Add. (fhandler_base::del_my_locks): New method. (get_ino): Rename from get_namehash. Change usage throughout Cygwin. (get_unique_id): New method. * fhandler.cc (fhandler_base::close): Call own del_my_locks method. Fix comment. (fhandler_base::fhandler_base): Accommodate new and changed members. (fhandler_base::fixup_after_fork): Call del_my_locks. (fhandler_base::fixup_after_exec): Ditto for files with close-on-exec flag set. * fhandler_disk_file.cc (get_ino_by_handle): Rename from readdir_get_ino_by_handle. Accommodate throughout. (fhandler_base::open_fs): Fill ino with inode number if FS has good inodes. Allocate a LUID and store in unique_id to recognize file descriptors referencing the same file object. * flock.cc: Drop flock TODO comments. Use explicit types __dev32_t and __ino64_t instead of dev_t and ino_t. (LOCK_OBJ_NAME_LEN): Change to reflect longer lf_id length. (get_obj_handle_count): New method. (lockf_t::lf_id): Change type to long long. (inode_t::get_lock_obj_handle_count): Drop in favor of static function get_obj_handle_count. (inode_t::del_locks): Remove. (inode_t::get): Add create_if_missing flag argument. (inode_t::del_my_locks): Reimplement to handle POSIX and BSD flock locks. Return if node can be deleted or not. (inode_t::~inode_t): Ditto. Close handles to i_dir and i_mtx. (fixup_lockf_after_fork): Remove. (fhandler_base::del_my_locks): New method. (fixup_lockf_after_exec): Check if node can be deleted. (inode_t::get): Only create node if create_if_missing is set. Lock the returned node here before unlocking the node list. (inode_t::get_all_locks_list): Accommodate new lf_id length. (inode_t::create_lock_obj): Ditto. (lockf_t::open_lock_obj): Ditto. Change return type to bool. De-const. Set lf_obj instead of returning a handle. (lockf_t::del_lock_obj): Call SetEvent only if new incoming parameters allow it. Explain how it's supposed to work. (fhandler_disk_file::lock): Only fetch file length in SEEK_END case. Use NtQueryInformationFile(FileStandardInformation) instead of calling fstat_by_handle. Always unlock node before returning. Use fhandler's unique id to create lf_id for BSD flock locks. Rely on node lock from inode_t::get. Call del_lock_obj on removed locks here to allow explicit unlocking. Delete node if no lock exists on the file anymore. (lf_setlock): Get file handle as additional parameter. Handle the fact that lf_getblock now always opens the attached event object. Reactivate erroneously applied patch which deactivates setting thread priority. Additionally handle blocking on BSD flock locks. (lf_clearlock): Get file handle as additional parameter. (lf_getlock): Close event handle opened by lf_getblock. (lf_getblock): Open potentially blocking event object here and check its signal state if it's a BSD flock lock. (lf_wakelock): Get file handle as additional parameter. * fork.cc (frok::child): Drop call to fixup_lockf_after_fork. * ntdll.h (struct _EVENT_BASIC_INFORMATION): Define. (enum _EVENT_INFORMATION_CLASS): Define. (NtQueryEvent): Declare. * fhandler.h (fhandler_base::fs_flags): Remove. (fhandler_base::set_fs_flags): Remove. (fhandler_base::get_fs_flags): Remove. * fhandler.cc (fhandler_base::write): Check for sparse file using pc.fs_flags(). * fhandler_disk_file.cc (fhandler_disk_file::ftruncate): Ditto. The return of the volume serial number in fs_info. * fhandler.h (get_dev): New method. * fhandler_disk_file.cc (fhandler_base::fstat_by_handle): Drop call to NtQueryVolumeInformationFile(FileFsVolumeInformation). Just use get_dev() method. * fhandler_fifo.cc (fhandler_fifo::open) Use device ID and inode number to generate fifo name. * path.h (fs_info::sernum): New member. (fs_info::serial_number): New method. (path_conv::fs_serial_number): New method. * path.cc (fs_info::update): Fetch volume serial number and store in sernum.
2008-04-01 02:03:25 +08:00
/* Cygwin: No locked list. See deadlock recognition above. */
* flock.cc (LOCK_OBJ_NAME_LEN): Change to accommodate extra lf_ver field. (class lockf_t): Add lf_ver field. (lockf_t::lockf_t): Initialize lf_ver to 0. (class inode_t): Change i_wait to i_cnt. Change comment to explain change in usage. (inode_t:use): Rename from wait. Make private. (inode_t::unuse): Rename from unwait. Make private. (inode_t::inuse): Rename from waiting. Make private. (inode_t::notused): New public method to set use count to 0. (inode_t::unlock_and_remove): New method to unlock node and to delete it if it's unused in current process. (fhandler_base::del_my_locks): Drop global list lock. Drop variable no_locks_left. Simpify unlocking and removing node by just calling unlock_and_remove. (fixup_lockf_after_exec): Call notused method for each node. (inode_t::get): Call use method. Lock node only if outside of list lock. (inode_t::get_all_locks_list): Accommodate additional lf_ver field when creating lockf_t structure from object name. (lockf_t::create_lock_obj_attr): Accommodate additional lf_ver field when creating object name from lockf_t structure. Handle STATUS_OBJECT_NAME_COLLISION gracefully in F_POSIX case as well. Change comment accordingly. Increment lf_ver field rather than high byte of lf_wid field. Simplify comment. (fhandler_disk_file::lock): Always call unlock_and_remove rather than just UNLOCK on node. (lf_setlock): Move ret definition where it's used. Drop unneeded tests for obj being not NULL. Only check for deadlock condition if the lock we're trying to establish is a POSIX lock. Revamp object collecting and wait code to cover all cases. Don't return with EDEADLK if blocking process can't be opened for synchronization in F_POSIX case, rather just wait like in F_FLOCK case. Change system_printf to debug_printf in that case. Only run WaitForMultipleObjects with high priority. Close obj and process handles prior to locking node.
2011-08-29 21:50:25 +08:00
node->UNLOCK ();
* flock.cc (LOCK_OBJ_NAME_LEN): Change to accommodate extra lf_ver field. (class lockf_t): Add lf_ver field. (lockf_t::lockf_t): Initialize lf_ver to 0. (class inode_t): Change i_wait to i_cnt. Change comment to explain change in usage. (inode_t:use): Rename from wait. Make private. (inode_t::unuse): Rename from unwait. Make private. (inode_t::inuse): Rename from waiting. Make private. (inode_t::notused): New public method to set use count to 0. (inode_t::unlock_and_remove): New method to unlock node and to delete it if it's unused in current process. (fhandler_base::del_my_locks): Drop global list lock. Drop variable no_locks_left. Simpify unlocking and removing node by just calling unlock_and_remove. (fixup_lockf_after_exec): Call notused method for each node. (inode_t::get): Call use method. Lock node only if outside of list lock. (inode_t::get_all_locks_list): Accommodate additional lf_ver field when creating lockf_t structure from object name. (lockf_t::create_lock_obj_attr): Accommodate additional lf_ver field when creating object name from lockf_t structure. Handle STATUS_OBJECT_NAME_COLLISION gracefully in F_POSIX case as well. Change comment accordingly. Increment lf_ver field rather than high byte of lf_wid field. Simplify comment. (fhandler_disk_file::lock): Always call unlock_and_remove rather than just UNLOCK on node. (lf_setlock): Move ret definition where it's used. Drop unneeded tests for obj being not NULL. Only check for deadlock condition if the lock we're trying to establish is a POSIX lock. Revamp object collecting and wait code to cover all cases. Don't return with EDEADLK if blocking process can't be opened for synchronization in F_POSIX case, rather just wait like in F_FLOCK case. Change system_printf to debug_printf in that case. Only run WaitForMultipleObjects with high priority. Close obj and process handles prior to locking node.
2011-08-29 21:50:25 +08:00
/* Create list of objects to wait for. */
HANDLE w4[4] = { obj, NULL, NULL, NULL };
DWORD wait_count = 1;
DWORD timeout;
* flock.cc (LOCK_OBJ_NAME_LEN): Change to accommodate extra lf_ver field. (class lockf_t): Add lf_ver field. (lockf_t::lockf_t): Initialize lf_ver to 0. (class inode_t): Change i_wait to i_cnt. Change comment to explain change in usage. (inode_t:use): Rename from wait. Make private. (inode_t::unuse): Rename from unwait. Make private. (inode_t::inuse): Rename from waiting. Make private. (inode_t::notused): New public method to set use count to 0. (inode_t::unlock_and_remove): New method to unlock node and to delete it if it's unused in current process. (fhandler_base::del_my_locks): Drop global list lock. Drop variable no_locks_left. Simpify unlocking and removing node by just calling unlock_and_remove. (fixup_lockf_after_exec): Call notused method for each node. (inode_t::get): Call use method. Lock node only if outside of list lock. (inode_t::get_all_locks_list): Accommodate additional lf_ver field when creating lockf_t structure from object name. (lockf_t::create_lock_obj_attr): Accommodate additional lf_ver field when creating object name from lockf_t structure. Handle STATUS_OBJECT_NAME_COLLISION gracefully in F_POSIX case as well. Change comment accordingly. Increment lf_ver field rather than high byte of lf_wid field. Simplify comment. (fhandler_disk_file::lock): Always call unlock_and_remove rather than just UNLOCK on node. (lf_setlock): Move ret definition where it's used. Drop unneeded tests for obj being not NULL. Only check for deadlock condition if the lock we're trying to establish is a POSIX lock. Revamp object collecting and wait code to cover all cases. Don't return with EDEADLK if blocking process can't be opened for synchronization in F_POSIX case, rather just wait like in F_FLOCK case. Change system_printf to debug_printf in that case. Only run WaitForMultipleObjects with high priority. Close obj and process handles prior to locking node.
2011-08-29 21:50:25 +08:00
HANDLE proc = NULL;
* smallprint.cc (__small_vswprintf): Fix uninitialized usage of `w'. Revamp advisory file locking to avoid cross reference pointers as well as to allow BSD flock semantics. More agressively delete unused nodes and sync objects. * fhandler.h (fhandler_base::ino): Rename from namehash. Fix comment. (fhandler_base::node): Remove. (fhandler_base::unique_id): Add. (fhandler_base::del_my_locks): New method. (get_ino): Rename from get_namehash. Change usage throughout Cygwin. (get_unique_id): New method. * fhandler.cc (fhandler_base::close): Call own del_my_locks method. Fix comment. (fhandler_base::fhandler_base): Accommodate new and changed members. (fhandler_base::fixup_after_fork): Call del_my_locks. (fhandler_base::fixup_after_exec): Ditto for files with close-on-exec flag set. * fhandler_disk_file.cc (get_ino_by_handle): Rename from readdir_get_ino_by_handle. Accommodate throughout. (fhandler_base::open_fs): Fill ino with inode number if FS has good inodes. Allocate a LUID and store in unique_id to recognize file descriptors referencing the same file object. * flock.cc: Drop flock TODO comments. Use explicit types __dev32_t and __ino64_t instead of dev_t and ino_t. (LOCK_OBJ_NAME_LEN): Change to reflect longer lf_id length. (get_obj_handle_count): New method. (lockf_t::lf_id): Change type to long long. (inode_t::get_lock_obj_handle_count): Drop in favor of static function get_obj_handle_count. (inode_t::del_locks): Remove. (inode_t::get): Add create_if_missing flag argument. (inode_t::del_my_locks): Reimplement to handle POSIX and BSD flock locks. Return if node can be deleted or not. (inode_t::~inode_t): Ditto. Close handles to i_dir and i_mtx. (fixup_lockf_after_fork): Remove. (fhandler_base::del_my_locks): New method. (fixup_lockf_after_exec): Check if node can be deleted. (inode_t::get): Only create node if create_if_missing is set. Lock the returned node here before unlocking the node list. (inode_t::get_all_locks_list): Accommodate new lf_id length. (inode_t::create_lock_obj): Ditto. (lockf_t::open_lock_obj): Ditto. Change return type to bool. De-const. Set lf_obj instead of returning a handle. (lockf_t::del_lock_obj): Call SetEvent only if new incoming parameters allow it. Explain how it's supposed to work. (fhandler_disk_file::lock): Only fetch file length in SEEK_END case. Use NtQueryInformationFile(FileStandardInformation) instead of calling fstat_by_handle. Always unlock node before returning. Use fhandler's unique id to create lf_id for BSD flock locks. Rely on node lock from inode_t::get. Call del_lock_obj on removed locks here to allow explicit unlocking. Delete node if no lock exists on the file anymore. (lf_setlock): Get file handle as additional parameter. Handle the fact that lf_getblock now always opens the attached event object. Reactivate erroneously applied patch which deactivates setting thread priority. Additionally handle blocking on BSD flock locks. (lf_clearlock): Get file handle as additional parameter. (lf_getlock): Close event handle opened by lf_getblock. (lf_getblock): Open potentially blocking event object here and check its signal state if it's a BSD flock lock. (lf_wakelock): Get file handle as additional parameter. * fork.cc (frok::child): Drop call to fixup_lockf_after_fork. * ntdll.h (struct _EVENT_BASIC_INFORMATION): Define. (enum _EVENT_INFORMATION_CLASS): Define. (NtQueryEvent): Declare. * fhandler.h (fhandler_base::fs_flags): Remove. (fhandler_base::set_fs_flags): Remove. (fhandler_base::get_fs_flags): Remove. * fhandler.cc (fhandler_base::write): Check for sparse file using pc.fs_flags(). * fhandler_disk_file.cc (fhandler_disk_file::ftruncate): Ditto. The return of the volume serial number in fs_info. * fhandler.h (get_dev): New method. * fhandler_disk_file.cc (fhandler_base::fstat_by_handle): Drop call to NtQueryVolumeInformationFile(FileFsVolumeInformation). Just use get_dev() method. * fhandler_fifo.cc (fhandler_fifo::open) Use device ID and inode number to generate fifo name. * path.h (fs_info::sernum): New member. (fs_info::serial_number): New method. (path_conv::fs_serial_number): New method. * path.cc (fs_info::update): Fetch volume serial number and store in sernum.
2008-04-01 02:03:25 +08:00
if (lock->lf_flags & F_POSIX)
{
* flock.cc (LOCK_OBJ_NAME_LEN): Change to accommodate extra lf_ver field. (class lockf_t): Add lf_ver field. (lockf_t::lockf_t): Initialize lf_ver to 0. (class inode_t): Change i_wait to i_cnt. Change comment to explain change in usage. (inode_t:use): Rename from wait. Make private. (inode_t::unuse): Rename from unwait. Make private. (inode_t::inuse): Rename from waiting. Make private. (inode_t::notused): New public method to set use count to 0. (inode_t::unlock_and_remove): New method to unlock node and to delete it if it's unused in current process. (fhandler_base::del_my_locks): Drop global list lock. Drop variable no_locks_left. Simpify unlocking and removing node by just calling unlock_and_remove. (fixup_lockf_after_exec): Call notused method for each node. (inode_t::get): Call use method. Lock node only if outside of list lock. (inode_t::get_all_locks_list): Accommodate additional lf_ver field when creating lockf_t structure from object name. (lockf_t::create_lock_obj_attr): Accommodate additional lf_ver field when creating object name from lockf_t structure. Handle STATUS_OBJECT_NAME_COLLISION gracefully in F_POSIX case as well. Change comment accordingly. Increment lf_ver field rather than high byte of lf_wid field. Simplify comment. (fhandler_disk_file::lock): Always call unlock_and_remove rather than just UNLOCK on node. (lf_setlock): Move ret definition where it's used. Drop unneeded tests for obj being not NULL. Only check for deadlock condition if the lock we're trying to establish is a POSIX lock. Revamp object collecting and wait code to cover all cases. Don't return with EDEADLK if blocking process can't be opened for synchronization in F_POSIX case, rather just wait like in F_FLOCK case. Change system_printf to debug_printf in that case. Only run WaitForMultipleObjects with high priority. Close obj and process handles prior to locking node.
2011-08-29 21:50:25 +08:00
proc = OpenProcess (SYNCHRONIZE, FALSE, block->lf_wid);
* smallprint.cc (__small_vswprintf): Fix uninitialized usage of `w'. Revamp advisory file locking to avoid cross reference pointers as well as to allow BSD flock semantics. More agressively delete unused nodes and sync objects. * fhandler.h (fhandler_base::ino): Rename from namehash. Fix comment. (fhandler_base::node): Remove. (fhandler_base::unique_id): Add. (fhandler_base::del_my_locks): New method. (get_ino): Rename from get_namehash. Change usage throughout Cygwin. (get_unique_id): New method. * fhandler.cc (fhandler_base::close): Call own del_my_locks method. Fix comment. (fhandler_base::fhandler_base): Accommodate new and changed members. (fhandler_base::fixup_after_fork): Call del_my_locks. (fhandler_base::fixup_after_exec): Ditto for files with close-on-exec flag set. * fhandler_disk_file.cc (get_ino_by_handle): Rename from readdir_get_ino_by_handle. Accommodate throughout. (fhandler_base::open_fs): Fill ino with inode number if FS has good inodes. Allocate a LUID and store in unique_id to recognize file descriptors referencing the same file object. * flock.cc: Drop flock TODO comments. Use explicit types __dev32_t and __ino64_t instead of dev_t and ino_t. (LOCK_OBJ_NAME_LEN): Change to reflect longer lf_id length. (get_obj_handle_count): New method. (lockf_t::lf_id): Change type to long long. (inode_t::get_lock_obj_handle_count): Drop in favor of static function get_obj_handle_count. (inode_t::del_locks): Remove. (inode_t::get): Add create_if_missing flag argument. (inode_t::del_my_locks): Reimplement to handle POSIX and BSD flock locks. Return if node can be deleted or not. (inode_t::~inode_t): Ditto. Close handles to i_dir and i_mtx. (fixup_lockf_after_fork): Remove. (fhandler_base::del_my_locks): New method. (fixup_lockf_after_exec): Check if node can be deleted. (inode_t::get): Only create node if create_if_missing is set. Lock the returned node here before unlocking the node list. (inode_t::get_all_locks_list): Accommodate new lf_id length. (inode_t::create_lock_obj): Ditto. (lockf_t::open_lock_obj): Ditto. Change return type to bool. De-const. Set lf_obj instead of returning a handle. (lockf_t::del_lock_obj): Call SetEvent only if new incoming parameters allow it. Explain how it's supposed to work. (fhandler_disk_file::lock): Only fetch file length in SEEK_END case. Use NtQueryInformationFile(FileStandardInformation) instead of calling fstat_by_handle. Always unlock node before returning. Use fhandler's unique id to create lf_id for BSD flock locks. Rely on node lock from inode_t::get. Call del_lock_obj on removed locks here to allow explicit unlocking. Delete node if no lock exists on the file anymore. (lf_setlock): Get file handle as additional parameter. Handle the fact that lf_getblock now always opens the attached event object. Reactivate erroneously applied patch which deactivates setting thread priority. Additionally handle blocking on BSD flock locks. (lf_clearlock): Get file handle as additional parameter. (lf_getlock): Close event handle opened by lf_getblock. (lf_getblock): Open potentially blocking event object here and check its signal state if it's a BSD flock lock. (lf_wakelock): Get file handle as additional parameter. * fork.cc (frok::child): Drop call to fixup_lockf_after_fork. * ntdll.h (struct _EVENT_BASIC_INFORMATION): Define. (enum _EVENT_INFORMATION_CLASS): Define. (NtQueryEvent): Declare. * fhandler.h (fhandler_base::fs_flags): Remove. (fhandler_base::set_fs_flags): Remove. (fhandler_base::get_fs_flags): Remove. * fhandler.cc (fhandler_base::write): Check for sparse file using pc.fs_flags(). * fhandler_disk_file.cc (fhandler_disk_file::ftruncate): Ditto. The return of the volume serial number in fs_info. * fhandler.h (get_dev): New method. * fhandler_disk_file.cc (fhandler_base::fstat_by_handle): Drop call to NtQueryVolumeInformationFile(FileFsVolumeInformation). Just use get_dev() method. * fhandler_fifo.cc (fhandler_fifo::open) Use device ID and inode number to generate fifo name. * path.h (fs_info::sernum): New member. (fs_info::serial_number): New method. (path_conv::fs_serial_number): New method. * path.cc (fs_info::update): Fetch volume serial number and store in sernum.
2008-04-01 02:03:25 +08:00
if (!proc)
timeout = 0L;
* flock.cc (LOCK_OBJ_NAME_LEN): Change to accommodate extra lf_ver field. (class lockf_t): Add lf_ver field. (lockf_t::lockf_t): Initialize lf_ver to 0. (class inode_t): Change i_wait to i_cnt. Change comment to explain change in usage. (inode_t:use): Rename from wait. Make private. (inode_t::unuse): Rename from unwait. Make private. (inode_t::inuse): Rename from waiting. Make private. (inode_t::notused): New public method to set use count to 0. (inode_t::unlock_and_remove): New method to unlock node and to delete it if it's unused in current process. (fhandler_base::del_my_locks): Drop global list lock. Drop variable no_locks_left. Simpify unlocking and removing node by just calling unlock_and_remove. (fixup_lockf_after_exec): Call notused method for each node. (inode_t::get): Call use method. Lock node only if outside of list lock. (inode_t::get_all_locks_list): Accommodate additional lf_ver field when creating lockf_t structure from object name. (lockf_t::create_lock_obj_attr): Accommodate additional lf_ver field when creating object name from lockf_t structure. Handle STATUS_OBJECT_NAME_COLLISION gracefully in F_POSIX case as well. Change comment accordingly. Increment lf_ver field rather than high byte of lf_wid field. Simplify comment. (fhandler_disk_file::lock): Always call unlock_and_remove rather than just UNLOCK on node. (lf_setlock): Move ret definition where it's used. Drop unneeded tests for obj being not NULL. Only check for deadlock condition if the lock we're trying to establish is a POSIX lock. Revamp object collecting and wait code to cover all cases. Don't return with EDEADLK if blocking process can't be opened for synchronization in F_POSIX case, rather just wait like in F_FLOCK case. Change system_printf to debug_printf in that case. Only run WaitForMultipleObjects with high priority. Close obj and process handles prior to locking node.
2011-08-29 21:50:25 +08:00
else
{
w4[wait_count++] = proc;
timeout = INFINITE;
}
* smallprint.cc (__small_vswprintf): Fix uninitialized usage of `w'. Revamp advisory file locking to avoid cross reference pointers as well as to allow BSD flock semantics. More agressively delete unused nodes and sync objects. * fhandler.h (fhandler_base::ino): Rename from namehash. Fix comment. (fhandler_base::node): Remove. (fhandler_base::unique_id): Add. (fhandler_base::del_my_locks): New method. (get_ino): Rename from get_namehash. Change usage throughout Cygwin. (get_unique_id): New method. * fhandler.cc (fhandler_base::close): Call own del_my_locks method. Fix comment. (fhandler_base::fhandler_base): Accommodate new and changed members. (fhandler_base::fixup_after_fork): Call del_my_locks. (fhandler_base::fixup_after_exec): Ditto for files with close-on-exec flag set. * fhandler_disk_file.cc (get_ino_by_handle): Rename from readdir_get_ino_by_handle. Accommodate throughout. (fhandler_base::open_fs): Fill ino with inode number if FS has good inodes. Allocate a LUID and store in unique_id to recognize file descriptors referencing the same file object. * flock.cc: Drop flock TODO comments. Use explicit types __dev32_t and __ino64_t instead of dev_t and ino_t. (LOCK_OBJ_NAME_LEN): Change to reflect longer lf_id length. (get_obj_handle_count): New method. (lockf_t::lf_id): Change type to long long. (inode_t::get_lock_obj_handle_count): Drop in favor of static function get_obj_handle_count. (inode_t::del_locks): Remove. (inode_t::get): Add create_if_missing flag argument. (inode_t::del_my_locks): Reimplement to handle POSIX and BSD flock locks. Return if node can be deleted or not. (inode_t::~inode_t): Ditto. Close handles to i_dir and i_mtx. (fixup_lockf_after_fork): Remove. (fhandler_base::del_my_locks): New method. (fixup_lockf_after_exec): Check if node can be deleted. (inode_t::get): Only create node if create_if_missing is set. Lock the returned node here before unlocking the node list. (inode_t::get_all_locks_list): Accommodate new lf_id length. (inode_t::create_lock_obj): Ditto. (lockf_t::open_lock_obj): Ditto. Change return type to bool. De-const. Set lf_obj instead of returning a handle. (lockf_t::del_lock_obj): Call SetEvent only if new incoming parameters allow it. Explain how it's supposed to work. (fhandler_disk_file::lock): Only fetch file length in SEEK_END case. Use NtQueryInformationFile(FileStandardInformation) instead of calling fstat_by_handle. Always unlock node before returning. Use fhandler's unique id to create lf_id for BSD flock locks. Rely on node lock from inode_t::get. Call del_lock_obj on removed locks here to allow explicit unlocking. Delete node if no lock exists on the file anymore. (lf_setlock): Get file handle as additional parameter. Handle the fact that lf_getblock now always opens the attached event object. Reactivate erroneously applied patch which deactivates setting thread priority. Additionally handle blocking on BSD flock locks. (lf_clearlock): Get file handle as additional parameter. (lf_getlock): Close event handle opened by lf_getblock. (lf_getblock): Open potentially blocking event object here and check its signal state if it's a BSD flock lock. (lf_wakelock): Get file handle as additional parameter. * fork.cc (frok::child): Drop call to fixup_lockf_after_fork. * ntdll.h (struct _EVENT_BASIC_INFORMATION): Define. (enum _EVENT_INFORMATION_CLASS): Define. (NtQueryEvent): Declare. * fhandler.h (fhandler_base::fs_flags): Remove. (fhandler_base::set_fs_flags): Remove. (fhandler_base::get_fs_flags): Remove. * fhandler.cc (fhandler_base::write): Check for sparse file using pc.fs_flags(). * fhandler_disk_file.cc (fhandler_disk_file::ftruncate): Ditto. The return of the volume serial number in fs_info. * fhandler.h (get_dev): New method. * fhandler_disk_file.cc (fhandler_base::fstat_by_handle): Drop call to NtQueryVolumeInformationFile(FileFsVolumeInformation). Just use get_dev() method. * fhandler_fifo.cc (fhandler_fifo::open) Use device ID and inode number to generate fifo name. * path.h (fs_info::sernum): New member. (fs_info::serial_number): New method. (path_conv::fs_serial_number): New method. * path.cc (fs_info::update): Fetch volume serial number and store in sernum.
2008-04-01 02:03:25 +08:00
}
else
timeout = 100L;
* flock.cc (LOCK_OBJ_NAME_LEN): Change to accommodate extra lf_ver field. (class lockf_t): Add lf_ver field. (lockf_t::lockf_t): Initialize lf_ver to 0. (class inode_t): Change i_wait to i_cnt. Change comment to explain change in usage. (inode_t:use): Rename from wait. Make private. (inode_t::unuse): Rename from unwait. Make private. (inode_t::inuse): Rename from waiting. Make private. (inode_t::notused): New public method to set use count to 0. (inode_t::unlock_and_remove): New method to unlock node and to delete it if it's unused in current process. (fhandler_base::del_my_locks): Drop global list lock. Drop variable no_locks_left. Simpify unlocking and removing node by just calling unlock_and_remove. (fixup_lockf_after_exec): Call notused method for each node. (inode_t::get): Call use method. Lock node only if outside of list lock. (inode_t::get_all_locks_list): Accommodate additional lf_ver field when creating lockf_t structure from object name. (lockf_t::create_lock_obj_attr): Accommodate additional lf_ver field when creating object name from lockf_t structure. Handle STATUS_OBJECT_NAME_COLLISION gracefully in F_POSIX case as well. Change comment accordingly. Increment lf_ver field rather than high byte of lf_wid field. Simplify comment. (fhandler_disk_file::lock): Always call unlock_and_remove rather than just UNLOCK on node. (lf_setlock): Move ret definition where it's used. Drop unneeded tests for obj being not NULL. Only check for deadlock condition if the lock we're trying to establish is a POSIX lock. Revamp object collecting and wait code to cover all cases. Don't return with EDEADLK if blocking process can't be opened for synchronization in F_POSIX case, rather just wait like in F_FLOCK case. Change system_printf to debug_printf in that case. Only run WaitForMultipleObjects with high priority. Close obj and process handles prior to locking node.
2011-08-29 21:50:25 +08:00
DWORD WAIT_SIGNAL_ARRIVED = WAIT_OBJECT_0 + wait_count;
wait_signal_arrived here (w4[wait_count++]);
* flock.cc (LOCK_OBJ_NAME_LEN): Change to accommodate extra lf_ver field. (class lockf_t): Add lf_ver field. (lockf_t::lockf_t): Initialize lf_ver to 0. (class inode_t): Change i_wait to i_cnt. Change comment to explain change in usage. (inode_t:use): Rename from wait. Make private. (inode_t::unuse): Rename from unwait. Make private. (inode_t::inuse): Rename from waiting. Make private. (inode_t::notused): New public method to set use count to 0. (inode_t::unlock_and_remove): New method to unlock node and to delete it if it's unused in current process. (fhandler_base::del_my_locks): Drop global list lock. Drop variable no_locks_left. Simpify unlocking and removing node by just calling unlock_and_remove. (fixup_lockf_after_exec): Call notused method for each node. (inode_t::get): Call use method. Lock node only if outside of list lock. (inode_t::get_all_locks_list): Accommodate additional lf_ver field when creating lockf_t structure from object name. (lockf_t::create_lock_obj_attr): Accommodate additional lf_ver field when creating object name from lockf_t structure. Handle STATUS_OBJECT_NAME_COLLISION gracefully in F_POSIX case as well. Change comment accordingly. Increment lf_ver field rather than high byte of lf_wid field. Simplify comment. (fhandler_disk_file::lock): Always call unlock_and_remove rather than just UNLOCK on node. (lf_setlock): Move ret definition where it's used. Drop unneeded tests for obj being not NULL. Only check for deadlock condition if the lock we're trying to establish is a POSIX lock. Revamp object collecting and wait code to cover all cases. Don't return with EDEADLK if blocking process can't be opened for synchronization in F_POSIX case, rather just wait like in F_FLOCK case. Change system_printf to debug_printf in that case. Only run WaitForMultipleObjects with high priority. Close obj and process handles prior to locking node.
2011-08-29 21:50:25 +08:00
DWORD WAIT_THREAD_CANCELED = WAIT_TIMEOUT + 1;
HANDLE cancel_event = pthread::get_cancel_event ();
if (cancel_event)
{
WAIT_THREAD_CANCELED = WAIT_OBJECT_0 + wait_count;
w4[wait_count++] = cancel_event;
}
* flock.cc (LOCK_OBJ_NAME_LEN): Change to accommodate extra lf_ver field. (class lockf_t): Add lf_ver field. (lockf_t::lockf_t): Initialize lf_ver to 0. (class inode_t): Change i_wait to i_cnt. Change comment to explain change in usage. (inode_t:use): Rename from wait. Make private. (inode_t::unuse): Rename from unwait. Make private. (inode_t::inuse): Rename from waiting. Make private. (inode_t::notused): New public method to set use count to 0. (inode_t::unlock_and_remove): New method to unlock node and to delete it if it's unused in current process. (fhandler_base::del_my_locks): Drop global list lock. Drop variable no_locks_left. Simpify unlocking and removing node by just calling unlock_and_remove. (fixup_lockf_after_exec): Call notused method for each node. (inode_t::get): Call use method. Lock node only if outside of list lock. (inode_t::get_all_locks_list): Accommodate additional lf_ver field when creating lockf_t structure from object name. (lockf_t::create_lock_obj_attr): Accommodate additional lf_ver field when creating object name from lockf_t structure. Handle STATUS_OBJECT_NAME_COLLISION gracefully in F_POSIX case as well. Change comment accordingly. Increment lf_ver field rather than high byte of lf_wid field. Simplify comment. (fhandler_disk_file::lock): Always call unlock_and_remove rather than just UNLOCK on node. (lf_setlock): Move ret definition where it's used. Drop unneeded tests for obj being not NULL. Only check for deadlock condition if the lock we're trying to establish is a POSIX lock. Revamp object collecting and wait code to cover all cases. Don't return with EDEADLK if blocking process can't be opened for synchronization in F_POSIX case, rather just wait like in F_FLOCK case. Change system_printf to debug_printf in that case. Only run WaitForMultipleObjects with high priority. Close obj and process handles prior to locking node.
2011-08-29 21:50:25 +08:00
/* Wait for the blocking object and, for POSIX locks, its holding process.
2011-12-18 07:39:47 +08:00
Unfortunately, since BSD flock locks are not attached to a specific
* flock.cc (LOCK_OBJ_NAME_LEN): Change to accommodate extra lf_ver field. (class lockf_t): Add lf_ver field. (lockf_t::lockf_t): Initialize lf_ver to 0. (class inode_t): Change i_wait to i_cnt. Change comment to explain change in usage. (inode_t:use): Rename from wait. Make private. (inode_t::unuse): Rename from unwait. Make private. (inode_t::inuse): Rename from waiting. Make private. (inode_t::notused): New public method to set use count to 0. (inode_t::unlock_and_remove): New method to unlock node and to delete it if it's unused in current process. (fhandler_base::del_my_locks): Drop global list lock. Drop variable no_locks_left. Simpify unlocking and removing node by just calling unlock_and_remove. (fixup_lockf_after_exec): Call notused method for each node. (inode_t::get): Call use method. Lock node only if outside of list lock. (inode_t::get_all_locks_list): Accommodate additional lf_ver field when creating lockf_t structure from object name. (lockf_t::create_lock_obj_attr): Accommodate additional lf_ver field when creating object name from lockf_t structure. Handle STATUS_OBJECT_NAME_COLLISION gracefully in F_POSIX case as well. Change comment accordingly. Increment lf_ver field rather than high byte of lf_wid field. Simplify comment. (fhandler_disk_file::lock): Always call unlock_and_remove rather than just UNLOCK on node. (lf_setlock): Move ret definition where it's used. Drop unneeded tests for obj being not NULL. Only check for deadlock condition if the lock we're trying to establish is a POSIX lock. Revamp object collecting and wait code to cover all cases. Don't return with EDEADLK if blocking process can't be opened for synchronization in F_POSIX case, rather just wait like in F_FLOCK case. Change system_printf to debug_printf in that case. Only run WaitForMultipleObjects with high priority. Close obj and process handles prior to locking node.
2011-08-29 21:50:25 +08:00
process, we can't recognize an abandoned lock by sync'ing with the
creator process. We have to make sure the event object is in a
signalled state, or that it has gone away. The latter we can only
recognize by retrying to fetch the block list, so we must not wait
infinitely. For POSIX locks, if the process has already exited,
just check if a signal or a thread cancel request arrived. */
* flock.cc (LOCK_OBJ_NAME_LEN): Change to accommodate extra lf_ver field. (class lockf_t): Add lf_ver field. (lockf_t::lockf_t): Initialize lf_ver to 0. (class inode_t): Change i_wait to i_cnt. Change comment to explain change in usage. (inode_t:use): Rename from wait. Make private. (inode_t::unuse): Rename from unwait. Make private. (inode_t::inuse): Rename from waiting. Make private. (inode_t::notused): New public method to set use count to 0. (inode_t::unlock_and_remove): New method to unlock node and to delete it if it's unused in current process. (fhandler_base::del_my_locks): Drop global list lock. Drop variable no_locks_left. Simpify unlocking and removing node by just calling unlock_and_remove. (fixup_lockf_after_exec): Call notused method for each node. (inode_t::get): Call use method. Lock node only if outside of list lock. (inode_t::get_all_locks_list): Accommodate additional lf_ver field when creating lockf_t structure from object name. (lockf_t::create_lock_obj_attr): Accommodate additional lf_ver field when creating object name from lockf_t structure. Handle STATUS_OBJECT_NAME_COLLISION gracefully in F_POSIX case as well. Change comment accordingly. Increment lf_ver field rather than high byte of lf_wid field. Simplify comment. (fhandler_disk_file::lock): Always call unlock_and_remove rather than just UNLOCK on node. (lf_setlock): Move ret definition where it's used. Drop unneeded tests for obj being not NULL. Only check for deadlock condition if the lock we're trying to establish is a POSIX lock. Revamp object collecting and wait code to cover all cases. Don't return with EDEADLK if blocking process can't be opened for synchronization in F_POSIX case, rather just wait like in F_FLOCK case. Change system_printf to debug_printf in that case. Only run WaitForMultipleObjects with high priority. Close obj and process handles prior to locking node.
2011-08-29 21:50:25 +08:00
SetThreadPriority (GetCurrentThread (), priority);
DWORD ret = WaitForMultipleObjects (wait_count, w4, FALSE, timeout);
* smallprint.cc (__small_vswprintf): Fix uninitialized usage of `w'. Revamp advisory file locking to avoid cross reference pointers as well as to allow BSD flock semantics. More agressively delete unused nodes and sync objects. * fhandler.h (fhandler_base::ino): Rename from namehash. Fix comment. (fhandler_base::node): Remove. (fhandler_base::unique_id): Add. (fhandler_base::del_my_locks): New method. (get_ino): Rename from get_namehash. Change usage throughout Cygwin. (get_unique_id): New method. * fhandler.cc (fhandler_base::close): Call own del_my_locks method. Fix comment. (fhandler_base::fhandler_base): Accommodate new and changed members. (fhandler_base::fixup_after_fork): Call del_my_locks. (fhandler_base::fixup_after_exec): Ditto for files with close-on-exec flag set. * fhandler_disk_file.cc (get_ino_by_handle): Rename from readdir_get_ino_by_handle. Accommodate throughout. (fhandler_base::open_fs): Fill ino with inode number if FS has good inodes. Allocate a LUID and store in unique_id to recognize file descriptors referencing the same file object. * flock.cc: Drop flock TODO comments. Use explicit types __dev32_t and __ino64_t instead of dev_t and ino_t. (LOCK_OBJ_NAME_LEN): Change to reflect longer lf_id length. (get_obj_handle_count): New method. (lockf_t::lf_id): Change type to long long. (inode_t::get_lock_obj_handle_count): Drop in favor of static function get_obj_handle_count. (inode_t::del_locks): Remove. (inode_t::get): Add create_if_missing flag argument. (inode_t::del_my_locks): Reimplement to handle POSIX and BSD flock locks. Return if node can be deleted or not. (inode_t::~inode_t): Ditto. Close handles to i_dir and i_mtx. (fixup_lockf_after_fork): Remove. (fhandler_base::del_my_locks): New method. (fixup_lockf_after_exec): Check if node can be deleted. (inode_t::get): Only create node if create_if_missing is set. Lock the returned node here before unlocking the node list. (inode_t::get_all_locks_list): Accommodate new lf_id length. (inode_t::create_lock_obj): Ditto. (lockf_t::open_lock_obj): Ditto. Change return type to bool. De-const. Set lf_obj instead of returning a handle. (lockf_t::del_lock_obj): Call SetEvent only if new incoming parameters allow it. Explain how it's supposed to work. (fhandler_disk_file::lock): Only fetch file length in SEEK_END case. Use NtQueryInformationFile(FileStandardInformation) instead of calling fstat_by_handle. Always unlock node before returning. Use fhandler's unique id to create lf_id for BSD flock locks. Rely on node lock from inode_t::get. Call del_lock_obj on removed locks here to allow explicit unlocking. Delete node if no lock exists on the file anymore. (lf_setlock): Get file handle as additional parameter. Handle the fact that lf_getblock now always opens the attached event object. Reactivate erroneously applied patch which deactivates setting thread priority. Additionally handle blocking on BSD flock locks. (lf_clearlock): Get file handle as additional parameter. (lf_getlock): Close event handle opened by lf_getblock. (lf_getblock): Open potentially blocking event object here and check its signal state if it's a BSD flock lock. (lf_wakelock): Get file handle as additional parameter. * fork.cc (frok::child): Drop call to fixup_lockf_after_fork. * ntdll.h (struct _EVENT_BASIC_INFORMATION): Define. (enum _EVENT_INFORMATION_CLASS): Define. (NtQueryEvent): Declare. * fhandler.h (fhandler_base::fs_flags): Remove. (fhandler_base::set_fs_flags): Remove. (fhandler_base::get_fs_flags): Remove. * fhandler.cc (fhandler_base::write): Check for sparse file using pc.fs_flags(). * fhandler_disk_file.cc (fhandler_disk_file::ftruncate): Ditto. The return of the volume serial number in fs_info. * fhandler.h (get_dev): New method. * fhandler_disk_file.cc (fhandler_base::fstat_by_handle): Drop call to NtQueryVolumeInformationFile(FileFsVolumeInformation). Just use get_dev() method. * fhandler_fifo.cc (fhandler_fifo::open) Use device ID and inode number to generate fifo name. * path.h (fs_info::sernum): New member. (fs_info::serial_number): New method. (path_conv::fs_serial_number): New method. * path.cc (fs_info::update): Fetch volume serial number and store in sernum.
2008-04-01 02:03:25 +08:00
SetThreadPriority (GetCurrentThread (), old_prio);
* flock.cc (LOCK_OBJ_NAME_LEN): Change to accommodate extra lf_ver field. (class lockf_t): Add lf_ver field. (lockf_t::lockf_t): Initialize lf_ver to 0. (class inode_t): Change i_wait to i_cnt. Change comment to explain change in usage. (inode_t:use): Rename from wait. Make private. (inode_t::unuse): Rename from unwait. Make private. (inode_t::inuse): Rename from waiting. Make private. (inode_t::notused): New public method to set use count to 0. (inode_t::unlock_and_remove): New method to unlock node and to delete it if it's unused in current process. (fhandler_base::del_my_locks): Drop global list lock. Drop variable no_locks_left. Simpify unlocking and removing node by just calling unlock_and_remove. (fixup_lockf_after_exec): Call notused method for each node. (inode_t::get): Call use method. Lock node only if outside of list lock. (inode_t::get_all_locks_list): Accommodate additional lf_ver field when creating lockf_t structure from object name. (lockf_t::create_lock_obj_attr): Accommodate additional lf_ver field when creating object name from lockf_t structure. Handle STATUS_OBJECT_NAME_COLLISION gracefully in F_POSIX case as well. Change comment accordingly. Increment lf_ver field rather than high byte of lf_wid field. Simplify comment. (fhandler_disk_file::lock): Always call unlock_and_remove rather than just UNLOCK on node. (lf_setlock): Move ret definition where it's used. Drop unneeded tests for obj being not NULL. Only check for deadlock condition if the lock we're trying to establish is a POSIX lock. Revamp object collecting and wait code to cover all cases. Don't return with EDEADLK if blocking process can't be opened for synchronization in F_POSIX case, rather just wait like in F_FLOCK case. Change system_printf to debug_printf in that case. Only run WaitForMultipleObjects with high priority. Close obj and process handles prior to locking node.
2011-08-29 21:50:25 +08:00
if (proc)
CloseHandle (proc);
node->LOCK ();
/* Never close lock object handle outside of node lock! */
NtClose (obj);
if (ret == WAIT_SIGNAL_ARRIVED)
{
/* A signal came in. */
lock->lf_next = *clean;
*clean = lock;
return EINTR;
}
else if (ret == WAIT_THREAD_CANCELED)
{
/* The thread has been sent a cancellation request. */
lock->lf_next = *clean;
*clean = lock;
return ECANCELED;
}
else
/* The lock object has been set to signalled or ...
for POSIX locks, the process holding the lock has exited, or ...
* flock.cc (LOCK_OBJ_NAME_LEN): Change to accommodate extra lf_ver field. (class lockf_t): Add lf_ver field. (lockf_t::lockf_t): Initialize lf_ver to 0. (class inode_t): Change i_wait to i_cnt. Change comment to explain change in usage. (inode_t:use): Rename from wait. Make private. (inode_t::unuse): Rename from unwait. Make private. (inode_t::inuse): Rename from waiting. Make private. (inode_t::notused): New public method to set use count to 0. (inode_t::unlock_and_remove): New method to unlock node and to delete it if it's unused in current process. (fhandler_base::del_my_locks): Drop global list lock. Drop variable no_locks_left. Simpify unlocking and removing node by just calling unlock_and_remove. (fixup_lockf_after_exec): Call notused method for each node. (inode_t::get): Call use method. Lock node only if outside of list lock. (inode_t::get_all_locks_list): Accommodate additional lf_ver field when creating lockf_t structure from object name. (lockf_t::create_lock_obj_attr): Accommodate additional lf_ver field when creating object name from lockf_t structure. Handle STATUS_OBJECT_NAME_COLLISION gracefully in F_POSIX case as well. Change comment accordingly. Increment lf_ver field rather than high byte of lf_wid field. Simplify comment. (fhandler_disk_file::lock): Always call unlock_and_remove rather than just UNLOCK on node. (lf_setlock): Move ret definition where it's used. Drop unneeded tests for obj being not NULL. Only check for deadlock condition if the lock we're trying to establish is a POSIX lock. Revamp object collecting and wait code to cover all cases. Don't return with EDEADLK if blocking process can't be opened for synchronization in F_POSIX case, rather just wait like in F_FLOCK case. Change system_printf to debug_printf in that case. Only run WaitForMultipleObjects with high priority. Close obj and process handles prior to locking node.
2011-08-29 21:50:25 +08:00
just a timeout. Just retry. */
continue;
}
allow_others_to_sync ();
/*
* No blocks!! Add the lock. Note that we will
* downgrade or upgrade any overlapping locks this
* process already owns.
*
* Handle any locks that overlap.
*/
prev = head;
block = *head;
needtolink = 1;
for (;;)
{
ovcase = lf_findoverlap (block, lock, SELF, &prev, &overlap);
if (ovcase)
block = overlap->lf_next;
/*
* Six cases:
* 0) no overlap
* 1) overlap == lock
* 2) overlap contains lock
* 3) lock contains overlap
* 4) overlap starts before lock
* 5) overlap ends after lock
*/
switch (ovcase)
{
case 0: /* no overlap */
if (needtolink)
{
*prev = lock;
lock->lf_next = overlap;
lock->create_lock_obj ();
}
break;
case 1: /* overlap == lock */
/*
* If downgrading lock, others may be
* able to acquire it.
* Cygwin: Always wake lock.
*/
* smallprint.cc (__small_vswprintf): Fix uninitialized usage of `w'. Revamp advisory file locking to avoid cross reference pointers as well as to allow BSD flock semantics. More agressively delete unused nodes and sync objects. * fhandler.h (fhandler_base::ino): Rename from namehash. Fix comment. (fhandler_base::node): Remove. (fhandler_base::unique_id): Add. (fhandler_base::del_my_locks): New method. (get_ino): Rename from get_namehash. Change usage throughout Cygwin. (get_unique_id): New method. * fhandler.cc (fhandler_base::close): Call own del_my_locks method. Fix comment. (fhandler_base::fhandler_base): Accommodate new and changed members. (fhandler_base::fixup_after_fork): Call del_my_locks. (fhandler_base::fixup_after_exec): Ditto for files with close-on-exec flag set. * fhandler_disk_file.cc (get_ino_by_handle): Rename from readdir_get_ino_by_handle. Accommodate throughout. (fhandler_base::open_fs): Fill ino with inode number if FS has good inodes. Allocate a LUID and store in unique_id to recognize file descriptors referencing the same file object. * flock.cc: Drop flock TODO comments. Use explicit types __dev32_t and __ino64_t instead of dev_t and ino_t. (LOCK_OBJ_NAME_LEN): Change to reflect longer lf_id length. (get_obj_handle_count): New method. (lockf_t::lf_id): Change type to long long. (inode_t::get_lock_obj_handle_count): Drop in favor of static function get_obj_handle_count. (inode_t::del_locks): Remove. (inode_t::get): Add create_if_missing flag argument. (inode_t::del_my_locks): Reimplement to handle POSIX and BSD flock locks. Return if node can be deleted or not. (inode_t::~inode_t): Ditto. Close handles to i_dir and i_mtx. (fixup_lockf_after_fork): Remove. (fhandler_base::del_my_locks): New method. (fixup_lockf_after_exec): Check if node can be deleted. (inode_t::get): Only create node if create_if_missing is set. Lock the returned node here before unlocking the node list. (inode_t::get_all_locks_list): Accommodate new lf_id length. (inode_t::create_lock_obj): Ditto. (lockf_t::open_lock_obj): Ditto. Change return type to bool. De-const. Set lf_obj instead of returning a handle. (lockf_t::del_lock_obj): Call SetEvent only if new incoming parameters allow it. Explain how it's supposed to work. (fhandler_disk_file::lock): Only fetch file length in SEEK_END case. Use NtQueryInformationFile(FileStandardInformation) instead of calling fstat_by_handle. Always unlock node before returning. Use fhandler's unique id to create lf_id for BSD flock locks. Rely on node lock from inode_t::get. Call del_lock_obj on removed locks here to allow explicit unlocking. Delete node if no lock exists on the file anymore. (lf_setlock): Get file handle as additional parameter. Handle the fact that lf_getblock now always opens the attached event object. Reactivate erroneously applied patch which deactivates setting thread priority. Additionally handle blocking on BSD flock locks. (lf_clearlock): Get file handle as additional parameter. (lf_getlock): Close event handle opened by lf_getblock. (lf_getblock): Open potentially blocking event object here and check its signal state if it's a BSD flock lock. (lf_wakelock): Get file handle as additional parameter. * fork.cc (frok::child): Drop call to fixup_lockf_after_fork. * ntdll.h (struct _EVENT_BASIC_INFORMATION): Define. (enum _EVENT_INFORMATION_CLASS): Define. (NtQueryEvent): Declare. * fhandler.h (fhandler_base::fs_flags): Remove. (fhandler_base::set_fs_flags): Remove. (fhandler_base::get_fs_flags): Remove. * fhandler.cc (fhandler_base::write): Check for sparse file using pc.fs_flags(). * fhandler_disk_file.cc (fhandler_disk_file::ftruncate): Ditto. The return of the volume serial number in fs_info. * fhandler.h (get_dev): New method. * fhandler_disk_file.cc (fhandler_base::fstat_by_handle): Drop call to NtQueryVolumeInformationFile(FileFsVolumeInformation). Just use get_dev() method. * fhandler_fifo.cc (fhandler_fifo::open) Use device ID and inode number to generate fifo name. * path.h (fs_info::sernum): New member. (fs_info::serial_number): New method. (path_conv::fs_serial_number): New method. * path.cc (fs_info::update): Fetch volume serial number and store in sernum.
2008-04-01 02:03:25 +08:00
lf_wakelock (overlap, fhdl);
overlap->lf_type = lock->lf_type;
overlap->create_lock_obj ();
lock->lf_next = *clean;
*clean = lock;
break;
case 2: /* overlap contains lock */
/*
* Check for common starting point and different types.
*/
if (overlap->lf_type == lock->lf_type)
{
lock->lf_next = *clean;
*clean = lock;
break;
}
if (overlap->lf_start == lock->lf_start)
{
*prev = lock;
lock->lf_next = overlap;
overlap->lf_start = lock->lf_end + 1;
}
else
lf_split (overlap, lock, clean);
* smallprint.cc (__small_vswprintf): Fix uninitialized usage of `w'. Revamp advisory file locking to avoid cross reference pointers as well as to allow BSD flock semantics. More agressively delete unused nodes and sync objects. * fhandler.h (fhandler_base::ino): Rename from namehash. Fix comment. (fhandler_base::node): Remove. (fhandler_base::unique_id): Add. (fhandler_base::del_my_locks): New method. (get_ino): Rename from get_namehash. Change usage throughout Cygwin. (get_unique_id): New method. * fhandler.cc (fhandler_base::close): Call own del_my_locks method. Fix comment. (fhandler_base::fhandler_base): Accommodate new and changed members. (fhandler_base::fixup_after_fork): Call del_my_locks. (fhandler_base::fixup_after_exec): Ditto for files with close-on-exec flag set. * fhandler_disk_file.cc (get_ino_by_handle): Rename from readdir_get_ino_by_handle. Accommodate throughout. (fhandler_base::open_fs): Fill ino with inode number if FS has good inodes. Allocate a LUID and store in unique_id to recognize file descriptors referencing the same file object. * flock.cc: Drop flock TODO comments. Use explicit types __dev32_t and __ino64_t instead of dev_t and ino_t. (LOCK_OBJ_NAME_LEN): Change to reflect longer lf_id length. (get_obj_handle_count): New method. (lockf_t::lf_id): Change type to long long. (inode_t::get_lock_obj_handle_count): Drop in favor of static function get_obj_handle_count. (inode_t::del_locks): Remove. (inode_t::get): Add create_if_missing flag argument. (inode_t::del_my_locks): Reimplement to handle POSIX and BSD flock locks. Return if node can be deleted or not. (inode_t::~inode_t): Ditto. Close handles to i_dir and i_mtx. (fixup_lockf_after_fork): Remove. (fhandler_base::del_my_locks): New method. (fixup_lockf_after_exec): Check if node can be deleted. (inode_t::get): Only create node if create_if_missing is set. Lock the returned node here before unlocking the node list. (inode_t::get_all_locks_list): Accommodate new lf_id length. (inode_t::create_lock_obj): Ditto. (lockf_t::open_lock_obj): Ditto. Change return type to bool. De-const. Set lf_obj instead of returning a handle. (lockf_t::del_lock_obj): Call SetEvent only if new incoming parameters allow it. Explain how it's supposed to work. (fhandler_disk_file::lock): Only fetch file length in SEEK_END case. Use NtQueryInformationFile(FileStandardInformation) instead of calling fstat_by_handle. Always unlock node before returning. Use fhandler's unique id to create lf_id for BSD flock locks. Rely on node lock from inode_t::get. Call del_lock_obj on removed locks here to allow explicit unlocking. Delete node if no lock exists on the file anymore. (lf_setlock): Get file handle as additional parameter. Handle the fact that lf_getblock now always opens the attached event object. Reactivate erroneously applied patch which deactivates setting thread priority. Additionally handle blocking on BSD flock locks. (lf_clearlock): Get file handle as additional parameter. (lf_getlock): Close event handle opened by lf_getblock. (lf_getblock): Open potentially blocking event object here and check its signal state if it's a BSD flock lock. (lf_wakelock): Get file handle as additional parameter. * fork.cc (frok::child): Drop call to fixup_lockf_after_fork. * ntdll.h (struct _EVENT_BASIC_INFORMATION): Define. (enum _EVENT_INFORMATION_CLASS): Define. (NtQueryEvent): Declare. * fhandler.h (fhandler_base::fs_flags): Remove. (fhandler_base::set_fs_flags): Remove. (fhandler_base::get_fs_flags): Remove. * fhandler.cc (fhandler_base::write): Check for sparse file using pc.fs_flags(). * fhandler_disk_file.cc (fhandler_disk_file::ftruncate): Ditto. The return of the volume serial number in fs_info. * fhandler.h (get_dev): New method. * fhandler_disk_file.cc (fhandler_base::fstat_by_handle): Drop call to NtQueryVolumeInformationFile(FileFsVolumeInformation). Just use get_dev() method. * fhandler_fifo.cc (fhandler_fifo::open) Use device ID and inode number to generate fifo name. * path.h (fs_info::sernum): New member. (fs_info::serial_number): New method. (path_conv::fs_serial_number): New method. * path.cc (fs_info::update): Fetch volume serial number and store in sernum.
2008-04-01 02:03:25 +08:00
lf_wakelock (overlap, fhdl);
overlap->create_lock_obj ();
lock->create_lock_obj ();
if (lock->lf_next && !lock->lf_next->lf_obj)
lock->lf_next->create_lock_obj ();
break;
case 3: /* lock contains overlap */
/*
* If downgrading lock, others may be able to
* acquire it, otherwise take the list.
* Cygwin: Always wake old lock and create new lock.
*/
* smallprint.cc (__small_vswprintf): Fix uninitialized usage of `w'. Revamp advisory file locking to avoid cross reference pointers as well as to allow BSD flock semantics. More agressively delete unused nodes and sync objects. * fhandler.h (fhandler_base::ino): Rename from namehash. Fix comment. (fhandler_base::node): Remove. (fhandler_base::unique_id): Add. (fhandler_base::del_my_locks): New method. (get_ino): Rename from get_namehash. Change usage throughout Cygwin. (get_unique_id): New method. * fhandler.cc (fhandler_base::close): Call own del_my_locks method. Fix comment. (fhandler_base::fhandler_base): Accommodate new and changed members. (fhandler_base::fixup_after_fork): Call del_my_locks. (fhandler_base::fixup_after_exec): Ditto for files with close-on-exec flag set. * fhandler_disk_file.cc (get_ino_by_handle): Rename from readdir_get_ino_by_handle. Accommodate throughout. (fhandler_base::open_fs): Fill ino with inode number if FS has good inodes. Allocate a LUID and store in unique_id to recognize file descriptors referencing the same file object. * flock.cc: Drop flock TODO comments. Use explicit types __dev32_t and __ino64_t instead of dev_t and ino_t. (LOCK_OBJ_NAME_LEN): Change to reflect longer lf_id length. (get_obj_handle_count): New method. (lockf_t::lf_id): Change type to long long. (inode_t::get_lock_obj_handle_count): Drop in favor of static function get_obj_handle_count. (inode_t::del_locks): Remove. (inode_t::get): Add create_if_missing flag argument. (inode_t::del_my_locks): Reimplement to handle POSIX and BSD flock locks. Return if node can be deleted or not. (inode_t::~inode_t): Ditto. Close handles to i_dir and i_mtx. (fixup_lockf_after_fork): Remove. (fhandler_base::del_my_locks): New method. (fixup_lockf_after_exec): Check if node can be deleted. (inode_t::get): Only create node if create_if_missing is set. Lock the returned node here before unlocking the node list. (inode_t::get_all_locks_list): Accommodate new lf_id length. (inode_t::create_lock_obj): Ditto. (lockf_t::open_lock_obj): Ditto. Change return type to bool. De-const. Set lf_obj instead of returning a handle. (lockf_t::del_lock_obj): Call SetEvent only if new incoming parameters allow it. Explain how it's supposed to work. (fhandler_disk_file::lock): Only fetch file length in SEEK_END case. Use NtQueryInformationFile(FileStandardInformation) instead of calling fstat_by_handle. Always unlock node before returning. Use fhandler's unique id to create lf_id for BSD flock locks. Rely on node lock from inode_t::get. Call del_lock_obj on removed locks here to allow explicit unlocking. Delete node if no lock exists on the file anymore. (lf_setlock): Get file handle as additional parameter. Handle the fact that lf_getblock now always opens the attached event object. Reactivate erroneously applied patch which deactivates setting thread priority. Additionally handle blocking on BSD flock locks. (lf_clearlock): Get file handle as additional parameter. (lf_getlock): Close event handle opened by lf_getblock. (lf_getblock): Open potentially blocking event object here and check its signal state if it's a BSD flock lock. (lf_wakelock): Get file handle as additional parameter. * fork.cc (frok::child): Drop call to fixup_lockf_after_fork. * ntdll.h (struct _EVENT_BASIC_INFORMATION): Define. (enum _EVENT_INFORMATION_CLASS): Define. (NtQueryEvent): Declare. * fhandler.h (fhandler_base::fs_flags): Remove. (fhandler_base::set_fs_flags): Remove. (fhandler_base::get_fs_flags): Remove. * fhandler.cc (fhandler_base::write): Check for sparse file using pc.fs_flags(). * fhandler_disk_file.cc (fhandler_disk_file::ftruncate): Ditto. The return of the volume serial number in fs_info. * fhandler.h (get_dev): New method. * fhandler_disk_file.cc (fhandler_base::fstat_by_handle): Drop call to NtQueryVolumeInformationFile(FileFsVolumeInformation). Just use get_dev() method. * fhandler_fifo.cc (fhandler_fifo::open) Use device ID and inode number to generate fifo name. * path.h (fs_info::sernum): New member. (fs_info::serial_number): New method. (path_conv::fs_serial_number): New method. * path.cc (fs_info::update): Fetch volume serial number and store in sernum.
2008-04-01 02:03:25 +08:00
lf_wakelock (overlap, fhdl);
/*
* Add the new lock if necessary and delete the overlap.
*/
if (needtolink)
{
*prev = lock;
lock->lf_next = overlap->lf_next;
prev = &lock->lf_next;
lock->create_lock_obj ();
needtolink = 0;
}
else
*prev = overlap->lf_next;
overlap->lf_next = *clean;
*clean = overlap;
continue;
case 4: /* overlap starts before lock */
/*
* Add lock after overlap on the list.
*/
lock->lf_next = overlap->lf_next;
overlap->lf_next = lock;
overlap->lf_end = lock->lf_start - 1;
prev = &lock->lf_next;
* smallprint.cc (__small_vswprintf): Fix uninitialized usage of `w'. Revamp advisory file locking to avoid cross reference pointers as well as to allow BSD flock semantics. More agressively delete unused nodes and sync objects. * fhandler.h (fhandler_base::ino): Rename from namehash. Fix comment. (fhandler_base::node): Remove. (fhandler_base::unique_id): Add. (fhandler_base::del_my_locks): New method. (get_ino): Rename from get_namehash. Change usage throughout Cygwin. (get_unique_id): New method. * fhandler.cc (fhandler_base::close): Call own del_my_locks method. Fix comment. (fhandler_base::fhandler_base): Accommodate new and changed members. (fhandler_base::fixup_after_fork): Call del_my_locks. (fhandler_base::fixup_after_exec): Ditto for files with close-on-exec flag set. * fhandler_disk_file.cc (get_ino_by_handle): Rename from readdir_get_ino_by_handle. Accommodate throughout. (fhandler_base::open_fs): Fill ino with inode number if FS has good inodes. Allocate a LUID and store in unique_id to recognize file descriptors referencing the same file object. * flock.cc: Drop flock TODO comments. Use explicit types __dev32_t and __ino64_t instead of dev_t and ino_t. (LOCK_OBJ_NAME_LEN): Change to reflect longer lf_id length. (get_obj_handle_count): New method. (lockf_t::lf_id): Change type to long long. (inode_t::get_lock_obj_handle_count): Drop in favor of static function get_obj_handle_count. (inode_t::del_locks): Remove. (inode_t::get): Add create_if_missing flag argument. (inode_t::del_my_locks): Reimplement to handle POSIX and BSD flock locks. Return if node can be deleted or not. (inode_t::~inode_t): Ditto. Close handles to i_dir and i_mtx. (fixup_lockf_after_fork): Remove. (fhandler_base::del_my_locks): New method. (fixup_lockf_after_exec): Check if node can be deleted. (inode_t::get): Only create node if create_if_missing is set. Lock the returned node here before unlocking the node list. (inode_t::get_all_locks_list): Accommodate new lf_id length. (inode_t::create_lock_obj): Ditto. (lockf_t::open_lock_obj): Ditto. Change return type to bool. De-const. Set lf_obj instead of returning a handle. (lockf_t::del_lock_obj): Call SetEvent only if new incoming parameters allow it. Explain how it's supposed to work. (fhandler_disk_file::lock): Only fetch file length in SEEK_END case. Use NtQueryInformationFile(FileStandardInformation) instead of calling fstat_by_handle. Always unlock node before returning. Use fhandler's unique id to create lf_id for BSD flock locks. Rely on node lock from inode_t::get. Call del_lock_obj on removed locks here to allow explicit unlocking. Delete node if no lock exists on the file anymore. (lf_setlock): Get file handle as additional parameter. Handle the fact that lf_getblock now always opens the attached event object. Reactivate erroneously applied patch which deactivates setting thread priority. Additionally handle blocking on BSD flock locks. (lf_clearlock): Get file handle as additional parameter. (lf_getlock): Close event handle opened by lf_getblock. (lf_getblock): Open potentially blocking event object here and check its signal state if it's a BSD flock lock. (lf_wakelock): Get file handle as additional parameter. * fork.cc (frok::child): Drop call to fixup_lockf_after_fork. * ntdll.h (struct _EVENT_BASIC_INFORMATION): Define. (enum _EVENT_INFORMATION_CLASS): Define. (NtQueryEvent): Declare. * fhandler.h (fhandler_base::fs_flags): Remove. (fhandler_base::set_fs_flags): Remove. (fhandler_base::get_fs_flags): Remove. * fhandler.cc (fhandler_base::write): Check for sparse file using pc.fs_flags(). * fhandler_disk_file.cc (fhandler_disk_file::ftruncate): Ditto. The return of the volume serial number in fs_info. * fhandler.h (get_dev): New method. * fhandler_disk_file.cc (fhandler_base::fstat_by_handle): Drop call to NtQueryVolumeInformationFile(FileFsVolumeInformation). Just use get_dev() method. * fhandler_fifo.cc (fhandler_fifo::open) Use device ID and inode number to generate fifo name. * path.h (fs_info::sernum): New member. (fs_info::serial_number): New method. (path_conv::fs_serial_number): New method. * path.cc (fs_info::update): Fetch volume serial number and store in sernum.
2008-04-01 02:03:25 +08:00
lf_wakelock (overlap, fhdl);
overlap->create_lock_obj ();
lock->create_lock_obj ();
needtolink = 0;
continue;
case 5: /* overlap ends after lock */
/*
* Add the new lock before overlap.
*/
if (needtolink) {
*prev = lock;
lock->lf_next = overlap;
}
overlap->lf_start = lock->lf_end + 1;
* smallprint.cc (__small_vswprintf): Fix uninitialized usage of `w'. Revamp advisory file locking to avoid cross reference pointers as well as to allow BSD flock semantics. More agressively delete unused nodes and sync objects. * fhandler.h (fhandler_base::ino): Rename from namehash. Fix comment. (fhandler_base::node): Remove. (fhandler_base::unique_id): Add. (fhandler_base::del_my_locks): New method. (get_ino): Rename from get_namehash. Change usage throughout Cygwin. (get_unique_id): New method. * fhandler.cc (fhandler_base::close): Call own del_my_locks method. Fix comment. (fhandler_base::fhandler_base): Accommodate new and changed members. (fhandler_base::fixup_after_fork): Call del_my_locks. (fhandler_base::fixup_after_exec): Ditto for files with close-on-exec flag set. * fhandler_disk_file.cc (get_ino_by_handle): Rename from readdir_get_ino_by_handle. Accommodate throughout. (fhandler_base::open_fs): Fill ino with inode number if FS has good inodes. Allocate a LUID and store in unique_id to recognize file descriptors referencing the same file object. * flock.cc: Drop flock TODO comments. Use explicit types __dev32_t and __ino64_t instead of dev_t and ino_t. (LOCK_OBJ_NAME_LEN): Change to reflect longer lf_id length. (get_obj_handle_count): New method. (lockf_t::lf_id): Change type to long long. (inode_t::get_lock_obj_handle_count): Drop in favor of static function get_obj_handle_count. (inode_t::del_locks): Remove. (inode_t::get): Add create_if_missing flag argument. (inode_t::del_my_locks): Reimplement to handle POSIX and BSD flock locks. Return if node can be deleted or not. (inode_t::~inode_t): Ditto. Close handles to i_dir and i_mtx. (fixup_lockf_after_fork): Remove. (fhandler_base::del_my_locks): New method. (fixup_lockf_after_exec): Check if node can be deleted. (inode_t::get): Only create node if create_if_missing is set. Lock the returned node here before unlocking the node list. (inode_t::get_all_locks_list): Accommodate new lf_id length. (inode_t::create_lock_obj): Ditto. (lockf_t::open_lock_obj): Ditto. Change return type to bool. De-const. Set lf_obj instead of returning a handle. (lockf_t::del_lock_obj): Call SetEvent only if new incoming parameters allow it. Explain how it's supposed to work. (fhandler_disk_file::lock): Only fetch file length in SEEK_END case. Use NtQueryInformationFile(FileStandardInformation) instead of calling fstat_by_handle. Always unlock node before returning. Use fhandler's unique id to create lf_id for BSD flock locks. Rely on node lock from inode_t::get. Call del_lock_obj on removed locks here to allow explicit unlocking. Delete node if no lock exists on the file anymore. (lf_setlock): Get file handle as additional parameter. Handle the fact that lf_getblock now always opens the attached event object. Reactivate erroneously applied patch which deactivates setting thread priority. Additionally handle blocking on BSD flock locks. (lf_clearlock): Get file handle as additional parameter. (lf_getlock): Close event handle opened by lf_getblock. (lf_getblock): Open potentially blocking event object here and check its signal state if it's a BSD flock lock. (lf_wakelock): Get file handle as additional parameter. * fork.cc (frok::child): Drop call to fixup_lockf_after_fork. * ntdll.h (struct _EVENT_BASIC_INFORMATION): Define. (enum _EVENT_INFORMATION_CLASS): Define. (NtQueryEvent): Declare. * fhandler.h (fhandler_base::fs_flags): Remove. (fhandler_base::set_fs_flags): Remove. (fhandler_base::get_fs_flags): Remove. * fhandler.cc (fhandler_base::write): Check for sparse file using pc.fs_flags(). * fhandler_disk_file.cc (fhandler_disk_file::ftruncate): Ditto. The return of the volume serial number in fs_info. * fhandler.h (get_dev): New method. * fhandler_disk_file.cc (fhandler_base::fstat_by_handle): Drop call to NtQueryVolumeInformationFile(FileFsVolumeInformation). Just use get_dev() method. * fhandler_fifo.cc (fhandler_fifo::open) Use device ID and inode number to generate fifo name. * path.h (fs_info::sernum): New member. (fs_info::serial_number): New method. (path_conv::fs_serial_number): New method. * path.cc (fs_info::update): Fetch volume serial number and store in sernum.
2008-04-01 02:03:25 +08:00
lf_wakelock (overlap, fhdl);
lock->create_lock_obj ();
overlap->create_lock_obj ();
break;
}
break;
}
return 0;
}
/*
* Remove a byte-range lock on an inode_t.
*
* Generally, find the lock (or an overlap to that lock)
* and remove it (or shrink it), then wakeup anyone we can.
*/
static int
* smallprint.cc (__small_vswprintf): Fix uninitialized usage of `w'. Revamp advisory file locking to avoid cross reference pointers as well as to allow BSD flock semantics. More agressively delete unused nodes and sync objects. * fhandler.h (fhandler_base::ino): Rename from namehash. Fix comment. (fhandler_base::node): Remove. (fhandler_base::unique_id): Add. (fhandler_base::del_my_locks): New method. (get_ino): Rename from get_namehash. Change usage throughout Cygwin. (get_unique_id): New method. * fhandler.cc (fhandler_base::close): Call own del_my_locks method. Fix comment. (fhandler_base::fhandler_base): Accommodate new and changed members. (fhandler_base::fixup_after_fork): Call del_my_locks. (fhandler_base::fixup_after_exec): Ditto for files with close-on-exec flag set. * fhandler_disk_file.cc (get_ino_by_handle): Rename from readdir_get_ino_by_handle. Accommodate throughout. (fhandler_base::open_fs): Fill ino with inode number if FS has good inodes. Allocate a LUID and store in unique_id to recognize file descriptors referencing the same file object. * flock.cc: Drop flock TODO comments. Use explicit types __dev32_t and __ino64_t instead of dev_t and ino_t. (LOCK_OBJ_NAME_LEN): Change to reflect longer lf_id length. (get_obj_handle_count): New method. (lockf_t::lf_id): Change type to long long. (inode_t::get_lock_obj_handle_count): Drop in favor of static function get_obj_handle_count. (inode_t::del_locks): Remove. (inode_t::get): Add create_if_missing flag argument. (inode_t::del_my_locks): Reimplement to handle POSIX and BSD flock locks. Return if node can be deleted or not. (inode_t::~inode_t): Ditto. Close handles to i_dir and i_mtx. (fixup_lockf_after_fork): Remove. (fhandler_base::del_my_locks): New method. (fixup_lockf_after_exec): Check if node can be deleted. (inode_t::get): Only create node if create_if_missing is set. Lock the returned node here before unlocking the node list. (inode_t::get_all_locks_list): Accommodate new lf_id length. (inode_t::create_lock_obj): Ditto. (lockf_t::open_lock_obj): Ditto. Change return type to bool. De-const. Set lf_obj instead of returning a handle. (lockf_t::del_lock_obj): Call SetEvent only if new incoming parameters allow it. Explain how it's supposed to work. (fhandler_disk_file::lock): Only fetch file length in SEEK_END case. Use NtQueryInformationFile(FileStandardInformation) instead of calling fstat_by_handle. Always unlock node before returning. Use fhandler's unique id to create lf_id for BSD flock locks. Rely on node lock from inode_t::get. Call del_lock_obj on removed locks here to allow explicit unlocking. Delete node if no lock exists on the file anymore. (lf_setlock): Get file handle as additional parameter. Handle the fact that lf_getblock now always opens the attached event object. Reactivate erroneously applied patch which deactivates setting thread priority. Additionally handle blocking on BSD flock locks. (lf_clearlock): Get file handle as additional parameter. (lf_getlock): Close event handle opened by lf_getblock. (lf_getblock): Open potentially blocking event object here and check its signal state if it's a BSD flock lock. (lf_wakelock): Get file handle as additional parameter. * fork.cc (frok::child): Drop call to fixup_lockf_after_fork. * ntdll.h (struct _EVENT_BASIC_INFORMATION): Define. (enum _EVENT_INFORMATION_CLASS): Define. (NtQueryEvent): Declare. * fhandler.h (fhandler_base::fs_flags): Remove. (fhandler_base::set_fs_flags): Remove. (fhandler_base::get_fs_flags): Remove. * fhandler.cc (fhandler_base::write): Check for sparse file using pc.fs_flags(). * fhandler_disk_file.cc (fhandler_disk_file::ftruncate): Ditto. The return of the volume serial number in fs_info. * fhandler.h (get_dev): New method. * fhandler_disk_file.cc (fhandler_base::fstat_by_handle): Drop call to NtQueryVolumeInformationFile(FileFsVolumeInformation). Just use get_dev() method. * fhandler_fifo.cc (fhandler_fifo::open) Use device ID and inode number to generate fifo name. * path.h (fs_info::sernum): New member. (fs_info::serial_number): New method. (path_conv::fs_serial_number): New method. * path.cc (fs_info::update): Fetch volume serial number and store in sernum.
2008-04-01 02:03:25 +08:00
lf_clearlock (lockf_t *unlock, lockf_t **clean, HANDLE fhdl)
{
lockf_t **head = unlock->lf_head;
lockf_t *lf = *head;
lockf_t *overlap, **prev;
int ovcase;
if (lf == NOLOCKF)
return 0;
prev = head;
while ((ovcase = lf_findoverlap (lf, unlock, SELF, &prev, &overlap)))
{
/*
* Wakeup the list of locks to be retried.
*/
* smallprint.cc (__small_vswprintf): Fix uninitialized usage of `w'. Revamp advisory file locking to avoid cross reference pointers as well as to allow BSD flock semantics. More agressively delete unused nodes and sync objects. * fhandler.h (fhandler_base::ino): Rename from namehash. Fix comment. (fhandler_base::node): Remove. (fhandler_base::unique_id): Add. (fhandler_base::del_my_locks): New method. (get_ino): Rename from get_namehash. Change usage throughout Cygwin. (get_unique_id): New method. * fhandler.cc (fhandler_base::close): Call own del_my_locks method. Fix comment. (fhandler_base::fhandler_base): Accommodate new and changed members. (fhandler_base::fixup_after_fork): Call del_my_locks. (fhandler_base::fixup_after_exec): Ditto for files with close-on-exec flag set. * fhandler_disk_file.cc (get_ino_by_handle): Rename from readdir_get_ino_by_handle. Accommodate throughout. (fhandler_base::open_fs): Fill ino with inode number if FS has good inodes. Allocate a LUID and store in unique_id to recognize file descriptors referencing the same file object. * flock.cc: Drop flock TODO comments. Use explicit types __dev32_t and __ino64_t instead of dev_t and ino_t. (LOCK_OBJ_NAME_LEN): Change to reflect longer lf_id length. (get_obj_handle_count): New method. (lockf_t::lf_id): Change type to long long. (inode_t::get_lock_obj_handle_count): Drop in favor of static function get_obj_handle_count. (inode_t::del_locks): Remove. (inode_t::get): Add create_if_missing flag argument. (inode_t::del_my_locks): Reimplement to handle POSIX and BSD flock locks. Return if node can be deleted or not. (inode_t::~inode_t): Ditto. Close handles to i_dir and i_mtx. (fixup_lockf_after_fork): Remove. (fhandler_base::del_my_locks): New method. (fixup_lockf_after_exec): Check if node can be deleted. (inode_t::get): Only create node if create_if_missing is set. Lock the returned node here before unlocking the node list. (inode_t::get_all_locks_list): Accommodate new lf_id length. (inode_t::create_lock_obj): Ditto. (lockf_t::open_lock_obj): Ditto. Change return type to bool. De-const. Set lf_obj instead of returning a handle. (lockf_t::del_lock_obj): Call SetEvent only if new incoming parameters allow it. Explain how it's supposed to work. (fhandler_disk_file::lock): Only fetch file length in SEEK_END case. Use NtQueryInformationFile(FileStandardInformation) instead of calling fstat_by_handle. Always unlock node before returning. Use fhandler's unique id to create lf_id for BSD flock locks. Rely on node lock from inode_t::get. Call del_lock_obj on removed locks here to allow explicit unlocking. Delete node if no lock exists on the file anymore. (lf_setlock): Get file handle as additional parameter. Handle the fact that lf_getblock now always opens the attached event object. Reactivate erroneously applied patch which deactivates setting thread priority. Additionally handle blocking on BSD flock locks. (lf_clearlock): Get file handle as additional parameter. (lf_getlock): Close event handle opened by lf_getblock. (lf_getblock): Open potentially blocking event object here and check its signal state if it's a BSD flock lock. (lf_wakelock): Get file handle as additional parameter. * fork.cc (frok::child): Drop call to fixup_lockf_after_fork. * ntdll.h (struct _EVENT_BASIC_INFORMATION): Define. (enum _EVENT_INFORMATION_CLASS): Define. (NtQueryEvent): Declare. * fhandler.h (fhandler_base::fs_flags): Remove. (fhandler_base::set_fs_flags): Remove. (fhandler_base::get_fs_flags): Remove. * fhandler.cc (fhandler_base::write): Check for sparse file using pc.fs_flags(). * fhandler_disk_file.cc (fhandler_disk_file::ftruncate): Ditto. The return of the volume serial number in fs_info. * fhandler.h (get_dev): New method. * fhandler_disk_file.cc (fhandler_base::fstat_by_handle): Drop call to NtQueryVolumeInformationFile(FileFsVolumeInformation). Just use get_dev() method. * fhandler_fifo.cc (fhandler_fifo::open) Use device ID and inode number to generate fifo name. * path.h (fs_info::sernum): New member. (fs_info::serial_number): New method. (path_conv::fs_serial_number): New method. * path.cc (fs_info::update): Fetch volume serial number and store in sernum.
2008-04-01 02:03:25 +08:00
lf_wakelock (overlap, fhdl);
switch (ovcase)
{
case 1: /* overlap == lock */
*prev = overlap->lf_next;
overlap->lf_next = *clean;
*clean = overlap;
break;
case 2: /* overlap contains lock: split it */
if (overlap->lf_start == unlock->lf_start)
{
overlap->lf_start = unlock->lf_end + 1;
overlap->create_lock_obj ();
break;
}
lf_split (overlap, unlock, clean);
overlap->lf_next = unlock->lf_next;
overlap->create_lock_obj ();
if (overlap->lf_next && !overlap->lf_next->lf_obj)
overlap->lf_next->create_lock_obj ();
break;
case 3: /* lock contains overlap */
*prev = overlap->lf_next;
lf = overlap->lf_next;
overlap->lf_next = *clean;
*clean = overlap;
continue;
case 4: /* overlap starts before lock */
overlap->lf_end = unlock->lf_start - 1;
prev = &overlap->lf_next;
lf = overlap->lf_next;
overlap->create_lock_obj ();
continue;
case 5: /* overlap ends after lock */
overlap->lf_start = unlock->lf_end + 1;
overlap->create_lock_obj ();
break;
}
break;
}
return 0;
}
/*
* Check whether there is a blocking lock,
* and if so return its process identifier.
*/
static int
2013-04-23 17:44:36 +08:00
lf_getlock (lockf_t *lock, inode_t *node, struct flock *fl)
{
lockf_t *block;
tmp_pathbuf tp;
/* Create temporary space for the all locks list. */
node->i_all_lf = (lockf_t *) (void * ) tp.w_get ();
if ((block = lf_getblock (lock, node)))
{
* smallprint.cc (__small_vswprintf): Fix uninitialized usage of `w'. Revamp advisory file locking to avoid cross reference pointers as well as to allow BSD flock semantics. More agressively delete unused nodes and sync objects. * fhandler.h (fhandler_base::ino): Rename from namehash. Fix comment. (fhandler_base::node): Remove. (fhandler_base::unique_id): Add. (fhandler_base::del_my_locks): New method. (get_ino): Rename from get_namehash. Change usage throughout Cygwin. (get_unique_id): New method. * fhandler.cc (fhandler_base::close): Call own del_my_locks method. Fix comment. (fhandler_base::fhandler_base): Accommodate new and changed members. (fhandler_base::fixup_after_fork): Call del_my_locks. (fhandler_base::fixup_after_exec): Ditto for files with close-on-exec flag set. * fhandler_disk_file.cc (get_ino_by_handle): Rename from readdir_get_ino_by_handle. Accommodate throughout. (fhandler_base::open_fs): Fill ino with inode number if FS has good inodes. Allocate a LUID and store in unique_id to recognize file descriptors referencing the same file object. * flock.cc: Drop flock TODO comments. Use explicit types __dev32_t and __ino64_t instead of dev_t and ino_t. (LOCK_OBJ_NAME_LEN): Change to reflect longer lf_id length. (get_obj_handle_count): New method. (lockf_t::lf_id): Change type to long long. (inode_t::get_lock_obj_handle_count): Drop in favor of static function get_obj_handle_count. (inode_t::del_locks): Remove. (inode_t::get): Add create_if_missing flag argument. (inode_t::del_my_locks): Reimplement to handle POSIX and BSD flock locks. Return if node can be deleted or not. (inode_t::~inode_t): Ditto. Close handles to i_dir and i_mtx. (fixup_lockf_after_fork): Remove. (fhandler_base::del_my_locks): New method. (fixup_lockf_after_exec): Check if node can be deleted. (inode_t::get): Only create node if create_if_missing is set. Lock the returned node here before unlocking the node list. (inode_t::get_all_locks_list): Accommodate new lf_id length. (inode_t::create_lock_obj): Ditto. (lockf_t::open_lock_obj): Ditto. Change return type to bool. De-const. Set lf_obj instead of returning a handle. (lockf_t::del_lock_obj): Call SetEvent only if new incoming parameters allow it. Explain how it's supposed to work. (fhandler_disk_file::lock): Only fetch file length in SEEK_END case. Use NtQueryInformationFile(FileStandardInformation) instead of calling fstat_by_handle. Always unlock node before returning. Use fhandler's unique id to create lf_id for BSD flock locks. Rely on node lock from inode_t::get. Call del_lock_obj on removed locks here to allow explicit unlocking. Delete node if no lock exists on the file anymore. (lf_setlock): Get file handle as additional parameter. Handle the fact that lf_getblock now always opens the attached event object. Reactivate erroneously applied patch which deactivates setting thread priority. Additionally handle blocking on BSD flock locks. (lf_clearlock): Get file handle as additional parameter. (lf_getlock): Close event handle opened by lf_getblock. (lf_getblock): Open potentially blocking event object here and check its signal state if it's a BSD flock lock. (lf_wakelock): Get file handle as additional parameter. * fork.cc (frok::child): Drop call to fixup_lockf_after_fork. * ntdll.h (struct _EVENT_BASIC_INFORMATION): Define. (enum _EVENT_INFORMATION_CLASS): Define. (NtQueryEvent): Declare. * fhandler.h (fhandler_base::fs_flags): Remove. (fhandler_base::set_fs_flags): Remove. (fhandler_base::get_fs_flags): Remove. * fhandler.cc (fhandler_base::write): Check for sparse file using pc.fs_flags(). * fhandler_disk_file.cc (fhandler_disk_file::ftruncate): Ditto. The return of the volume serial number in fs_info. * fhandler.h (get_dev): New method. * fhandler_disk_file.cc (fhandler_base::fstat_by_handle): Drop call to NtQueryVolumeInformationFile(FileFsVolumeInformation). Just use get_dev() method. * fhandler_fifo.cc (fhandler_fifo::open) Use device ID and inode number to generate fifo name. * path.h (fs_info::sernum): New member. (fs_info::serial_number): New method. (path_conv::fs_serial_number): New method. * path.cc (fs_info::update): Fetch volume serial number and store in sernum.
2008-04-01 02:03:25 +08:00
if (block->lf_obj)
block->close_lock_obj ();
fl->l_type = block->lf_type;
fl->l_whence = SEEK_SET;
fl->l_start = block->lf_start;
if (block->lf_end == -1)
fl->l_len = 0;
else
fl->l_len = block->lf_end - block->lf_start + 1;
if (block->lf_flags & F_POSIX)
* smallprint.cc (__small_vswprintf): Fix uninitialized usage of `w'. Revamp advisory file locking to avoid cross reference pointers as well as to allow BSD flock semantics. More agressively delete unused nodes and sync objects. * fhandler.h (fhandler_base::ino): Rename from namehash. Fix comment. (fhandler_base::node): Remove. (fhandler_base::unique_id): Add. (fhandler_base::del_my_locks): New method. (get_ino): Rename from get_namehash. Change usage throughout Cygwin. (get_unique_id): New method. * fhandler.cc (fhandler_base::close): Call own del_my_locks method. Fix comment. (fhandler_base::fhandler_base): Accommodate new and changed members. (fhandler_base::fixup_after_fork): Call del_my_locks. (fhandler_base::fixup_after_exec): Ditto for files with close-on-exec flag set. * fhandler_disk_file.cc (get_ino_by_handle): Rename from readdir_get_ino_by_handle. Accommodate throughout. (fhandler_base::open_fs): Fill ino with inode number if FS has good inodes. Allocate a LUID and store in unique_id to recognize file descriptors referencing the same file object. * flock.cc: Drop flock TODO comments. Use explicit types __dev32_t and __ino64_t instead of dev_t and ino_t. (LOCK_OBJ_NAME_LEN): Change to reflect longer lf_id length. (get_obj_handle_count): New method. (lockf_t::lf_id): Change type to long long. (inode_t::get_lock_obj_handle_count): Drop in favor of static function get_obj_handle_count. (inode_t::del_locks): Remove. (inode_t::get): Add create_if_missing flag argument. (inode_t::del_my_locks): Reimplement to handle POSIX and BSD flock locks. Return if node can be deleted or not. (inode_t::~inode_t): Ditto. Close handles to i_dir and i_mtx. (fixup_lockf_after_fork): Remove. (fhandler_base::del_my_locks): New method. (fixup_lockf_after_exec): Check if node can be deleted. (inode_t::get): Only create node if create_if_missing is set. Lock the returned node here before unlocking the node list. (inode_t::get_all_locks_list): Accommodate new lf_id length. (inode_t::create_lock_obj): Ditto. (lockf_t::open_lock_obj): Ditto. Change return type to bool. De-const. Set lf_obj instead of returning a handle. (lockf_t::del_lock_obj): Call SetEvent only if new incoming parameters allow it. Explain how it's supposed to work. (fhandler_disk_file::lock): Only fetch file length in SEEK_END case. Use NtQueryInformationFile(FileStandardInformation) instead of calling fstat_by_handle. Always unlock node before returning. Use fhandler's unique id to create lf_id for BSD flock locks. Rely on node lock from inode_t::get. Call del_lock_obj on removed locks here to allow explicit unlocking. Delete node if no lock exists on the file anymore. (lf_setlock): Get file handle as additional parameter. Handle the fact that lf_getblock now always opens the attached event object. Reactivate erroneously applied patch which deactivates setting thread priority. Additionally handle blocking on BSD flock locks. (lf_clearlock): Get file handle as additional parameter. (lf_getlock): Close event handle opened by lf_getblock. (lf_getblock): Open potentially blocking event object here and check its signal state if it's a BSD flock lock. (lf_wakelock): Get file handle as additional parameter. * fork.cc (frok::child): Drop call to fixup_lockf_after_fork. * ntdll.h (struct _EVENT_BASIC_INFORMATION): Define. (enum _EVENT_INFORMATION_CLASS): Define. (NtQueryEvent): Declare. * fhandler.h (fhandler_base::fs_flags): Remove. (fhandler_base::set_fs_flags): Remove. (fhandler_base::get_fs_flags): Remove. * fhandler.cc (fhandler_base::write): Check for sparse file using pc.fs_flags(). * fhandler_disk_file.cc (fhandler_disk_file::ftruncate): Ditto. The return of the volume serial number in fs_info. * fhandler.h (get_dev): New method. * fhandler_disk_file.cc (fhandler_base::fstat_by_handle): Drop call to NtQueryVolumeInformationFile(FileFsVolumeInformation). Just use get_dev() method. * fhandler_fifo.cc (fhandler_fifo::open) Use device ID and inode number to generate fifo name. * path.h (fs_info::sernum): New member. (fs_info::serial_number): New method. (path_conv::fs_serial_number): New method. * path.cc (fs_info::update): Fetch volume serial number and store in sernum.
2008-04-01 02:03:25 +08:00
fl->l_pid = (pid_t) block->lf_id;
else
fl->l_pid = -1;
}
else
fl->l_type = F_UNLCK;
return 0;
}
/*
* Walk the list of locks for an inode_t and
* return the first blocking lock.
*/
static lockf_t *
lf_getblock (lockf_t *lock, inode_t *node)
{
lockf_t **prev, *overlap;
lockf_t *lf = node->get_all_locks_list ();
int ovcase;
prev = lock->lf_head;
while ((ovcase = lf_findoverlap (lf, lock, OTHERS, &prev, &overlap)))
{
/*
* We've found an overlap, see if it blocks us
*/
if ((lock->lf_type == F_WRLCK || overlap->lf_type == F_WRLCK))
* smallprint.cc (__small_vswprintf): Fix uninitialized usage of `w'. Revamp advisory file locking to avoid cross reference pointers as well as to allow BSD flock semantics. More agressively delete unused nodes and sync objects. * fhandler.h (fhandler_base::ino): Rename from namehash. Fix comment. (fhandler_base::node): Remove. (fhandler_base::unique_id): Add. (fhandler_base::del_my_locks): New method. (get_ino): Rename from get_namehash. Change usage throughout Cygwin. (get_unique_id): New method. * fhandler.cc (fhandler_base::close): Call own del_my_locks method. Fix comment. (fhandler_base::fhandler_base): Accommodate new and changed members. (fhandler_base::fixup_after_fork): Call del_my_locks. (fhandler_base::fixup_after_exec): Ditto for files with close-on-exec flag set. * fhandler_disk_file.cc (get_ino_by_handle): Rename from readdir_get_ino_by_handle. Accommodate throughout. (fhandler_base::open_fs): Fill ino with inode number if FS has good inodes. Allocate a LUID and store in unique_id to recognize file descriptors referencing the same file object. * flock.cc: Drop flock TODO comments. Use explicit types __dev32_t and __ino64_t instead of dev_t and ino_t. (LOCK_OBJ_NAME_LEN): Change to reflect longer lf_id length. (get_obj_handle_count): New method. (lockf_t::lf_id): Change type to long long. (inode_t::get_lock_obj_handle_count): Drop in favor of static function get_obj_handle_count. (inode_t::del_locks): Remove. (inode_t::get): Add create_if_missing flag argument. (inode_t::del_my_locks): Reimplement to handle POSIX and BSD flock locks. Return if node can be deleted or not. (inode_t::~inode_t): Ditto. Close handles to i_dir and i_mtx. (fixup_lockf_after_fork): Remove. (fhandler_base::del_my_locks): New method. (fixup_lockf_after_exec): Check if node can be deleted. (inode_t::get): Only create node if create_if_missing is set. Lock the returned node here before unlocking the node list. (inode_t::get_all_locks_list): Accommodate new lf_id length. (inode_t::create_lock_obj): Ditto. (lockf_t::open_lock_obj): Ditto. Change return type to bool. De-const. Set lf_obj instead of returning a handle. (lockf_t::del_lock_obj): Call SetEvent only if new incoming parameters allow it. Explain how it's supposed to work. (fhandler_disk_file::lock): Only fetch file length in SEEK_END case. Use NtQueryInformationFile(FileStandardInformation) instead of calling fstat_by_handle. Always unlock node before returning. Use fhandler's unique id to create lf_id for BSD flock locks. Rely on node lock from inode_t::get. Call del_lock_obj on removed locks here to allow explicit unlocking. Delete node if no lock exists on the file anymore. (lf_setlock): Get file handle as additional parameter. Handle the fact that lf_getblock now always opens the attached event object. Reactivate erroneously applied patch which deactivates setting thread priority. Additionally handle blocking on BSD flock locks. (lf_clearlock): Get file handle as additional parameter. (lf_getlock): Close event handle opened by lf_getblock. (lf_getblock): Open potentially blocking event object here and check its signal state if it's a BSD flock lock. (lf_wakelock): Get file handle as additional parameter. * fork.cc (frok::child): Drop call to fixup_lockf_after_fork. * ntdll.h (struct _EVENT_BASIC_INFORMATION): Define. (enum _EVENT_INFORMATION_CLASS): Define. (NtQueryEvent): Declare. * fhandler.h (fhandler_base::fs_flags): Remove. (fhandler_base::set_fs_flags): Remove. (fhandler_base::get_fs_flags): Remove. * fhandler.cc (fhandler_base::write): Check for sparse file using pc.fs_flags(). * fhandler_disk_file.cc (fhandler_disk_file::ftruncate): Ditto. The return of the volume serial number in fs_info. * fhandler.h (get_dev): New method. * fhandler_disk_file.cc (fhandler_base::fstat_by_handle): Drop call to NtQueryVolumeInformationFile(FileFsVolumeInformation). Just use get_dev() method. * fhandler_fifo.cc (fhandler_fifo::open) Use device ID and inode number to generate fifo name. * path.h (fs_info::sernum): New member. (fs_info::serial_number): New method. (path_conv::fs_serial_number): New method. * path.cc (fs_info::update): Fetch volume serial number and store in sernum.
2008-04-01 02:03:25 +08:00
{
/* Open the event object for synchronization. */
if (overlap->open_lock_obj ())
{
/* Check if the event object is signalled. If so, the overlap
doesn't actually exist anymore. There are just a few open
handles left. */
if (!IsEventSignalled (overlap->lf_obj))
return overlap;
overlap->close_lock_obj ();
}
* smallprint.cc (__small_vswprintf): Fix uninitialized usage of `w'. Revamp advisory file locking to avoid cross reference pointers as well as to allow BSD flock semantics. More agressively delete unused nodes and sync objects. * fhandler.h (fhandler_base::ino): Rename from namehash. Fix comment. (fhandler_base::node): Remove. (fhandler_base::unique_id): Add. (fhandler_base::del_my_locks): New method. (get_ino): Rename from get_namehash. Change usage throughout Cygwin. (get_unique_id): New method. * fhandler.cc (fhandler_base::close): Call own del_my_locks method. Fix comment. (fhandler_base::fhandler_base): Accommodate new and changed members. (fhandler_base::fixup_after_fork): Call del_my_locks. (fhandler_base::fixup_after_exec): Ditto for files with close-on-exec flag set. * fhandler_disk_file.cc (get_ino_by_handle): Rename from readdir_get_ino_by_handle. Accommodate throughout. (fhandler_base::open_fs): Fill ino with inode number if FS has good inodes. Allocate a LUID and store in unique_id to recognize file descriptors referencing the same file object. * flock.cc: Drop flock TODO comments. Use explicit types __dev32_t and __ino64_t instead of dev_t and ino_t. (LOCK_OBJ_NAME_LEN): Change to reflect longer lf_id length. (get_obj_handle_count): New method. (lockf_t::lf_id): Change type to long long. (inode_t::get_lock_obj_handle_count): Drop in favor of static function get_obj_handle_count. (inode_t::del_locks): Remove. (inode_t::get): Add create_if_missing flag argument. (inode_t::del_my_locks): Reimplement to handle POSIX and BSD flock locks. Return if node can be deleted or not. (inode_t::~inode_t): Ditto. Close handles to i_dir and i_mtx. (fixup_lockf_after_fork): Remove. (fhandler_base::del_my_locks): New method. (fixup_lockf_after_exec): Check if node can be deleted. (inode_t::get): Only create node if create_if_missing is set. Lock the returned node here before unlocking the node list. (inode_t::get_all_locks_list): Accommodate new lf_id length. (inode_t::create_lock_obj): Ditto. (lockf_t::open_lock_obj): Ditto. Change return type to bool. De-const. Set lf_obj instead of returning a handle. (lockf_t::del_lock_obj): Call SetEvent only if new incoming parameters allow it. Explain how it's supposed to work. (fhandler_disk_file::lock): Only fetch file length in SEEK_END case. Use NtQueryInformationFile(FileStandardInformation) instead of calling fstat_by_handle. Always unlock node before returning. Use fhandler's unique id to create lf_id for BSD flock locks. Rely on node lock from inode_t::get. Call del_lock_obj on removed locks here to allow explicit unlocking. Delete node if no lock exists on the file anymore. (lf_setlock): Get file handle as additional parameter. Handle the fact that lf_getblock now always opens the attached event object. Reactivate erroneously applied patch which deactivates setting thread priority. Additionally handle blocking on BSD flock locks. (lf_clearlock): Get file handle as additional parameter. (lf_getlock): Close event handle opened by lf_getblock. (lf_getblock): Open potentially blocking event object here and check its signal state if it's a BSD flock lock. (lf_wakelock): Get file handle as additional parameter. * fork.cc (frok::child): Drop call to fixup_lockf_after_fork. * ntdll.h (struct _EVENT_BASIC_INFORMATION): Define. (enum _EVENT_INFORMATION_CLASS): Define. (NtQueryEvent): Declare. * fhandler.h (fhandler_base::fs_flags): Remove. (fhandler_base::set_fs_flags): Remove. (fhandler_base::get_fs_flags): Remove. * fhandler.cc (fhandler_base::write): Check for sparse file using pc.fs_flags(). * fhandler_disk_file.cc (fhandler_disk_file::ftruncate): Ditto. The return of the volume serial number in fs_info. * fhandler.h (get_dev): New method. * fhandler_disk_file.cc (fhandler_base::fstat_by_handle): Drop call to NtQueryVolumeInformationFile(FileFsVolumeInformation). Just use get_dev() method. * fhandler_fifo.cc (fhandler_fifo::open) Use device ID and inode number to generate fifo name. * path.h (fs_info::sernum): New member. (fs_info::serial_number): New method. (path_conv::fs_serial_number): New method. * path.cc (fs_info::update): Fetch volume serial number and store in sernum.
2008-04-01 02:03:25 +08:00
}
/*
* Nope, point to the next one on the list and
* see if it blocks us
*/
lf = overlap->lf_next;
}
return NOLOCKF;
}
/*
* Walk the list of locks for an inode_t to
* find an overlapping lock (if any).
*
* NOTE: this returns only the FIRST overlapping lock. There
* may be more than one.
*/
static int
lf_findoverlap (lockf_t *lf, lockf_t *lock, int type, lockf_t ***prev,
lockf_t **overlap)
{
2013-04-23 17:44:36 +08:00
off_t start, end;
*overlap = lf;
if (lf == NOLOCKF)
return 0;
start = lock->lf_start;
end = lock->lf_end;
while (lf != NOLOCKF)
{
if (((type & SELF) && lf->lf_id != lock->lf_id)
|| ((type & OTHERS) && lf->lf_id == lock->lf_id)
* smallprint.cc (__small_vswprintf): Fix uninitialized usage of `w'. Revamp advisory file locking to avoid cross reference pointers as well as to allow BSD flock semantics. More agressively delete unused nodes and sync objects. * fhandler.h (fhandler_base::ino): Rename from namehash. Fix comment. (fhandler_base::node): Remove. (fhandler_base::unique_id): Add. (fhandler_base::del_my_locks): New method. (get_ino): Rename from get_namehash. Change usage throughout Cygwin. (get_unique_id): New method. * fhandler.cc (fhandler_base::close): Call own del_my_locks method. Fix comment. (fhandler_base::fhandler_base): Accommodate new and changed members. (fhandler_base::fixup_after_fork): Call del_my_locks. (fhandler_base::fixup_after_exec): Ditto for files with close-on-exec flag set. * fhandler_disk_file.cc (get_ino_by_handle): Rename from readdir_get_ino_by_handle. Accommodate throughout. (fhandler_base::open_fs): Fill ino with inode number if FS has good inodes. Allocate a LUID and store in unique_id to recognize file descriptors referencing the same file object. * flock.cc: Drop flock TODO comments. Use explicit types __dev32_t and __ino64_t instead of dev_t and ino_t. (LOCK_OBJ_NAME_LEN): Change to reflect longer lf_id length. (get_obj_handle_count): New method. (lockf_t::lf_id): Change type to long long. (inode_t::get_lock_obj_handle_count): Drop in favor of static function get_obj_handle_count. (inode_t::del_locks): Remove. (inode_t::get): Add create_if_missing flag argument. (inode_t::del_my_locks): Reimplement to handle POSIX and BSD flock locks. Return if node can be deleted or not. (inode_t::~inode_t): Ditto. Close handles to i_dir and i_mtx. (fixup_lockf_after_fork): Remove. (fhandler_base::del_my_locks): New method. (fixup_lockf_after_exec): Check if node can be deleted. (inode_t::get): Only create node if create_if_missing is set. Lock the returned node here before unlocking the node list. (inode_t::get_all_locks_list): Accommodate new lf_id length. (inode_t::create_lock_obj): Ditto. (lockf_t::open_lock_obj): Ditto. Change return type to bool. De-const. Set lf_obj instead of returning a handle. (lockf_t::del_lock_obj): Call SetEvent only if new incoming parameters allow it. Explain how it's supposed to work. (fhandler_disk_file::lock): Only fetch file length in SEEK_END case. Use NtQueryInformationFile(FileStandardInformation) instead of calling fstat_by_handle. Always unlock node before returning. Use fhandler's unique id to create lf_id for BSD flock locks. Rely on node lock from inode_t::get. Call del_lock_obj on removed locks here to allow explicit unlocking. Delete node if no lock exists on the file anymore. (lf_setlock): Get file handle as additional parameter. Handle the fact that lf_getblock now always opens the attached event object. Reactivate erroneously applied patch which deactivates setting thread priority. Additionally handle blocking on BSD flock locks. (lf_clearlock): Get file handle as additional parameter. (lf_getlock): Close event handle opened by lf_getblock. (lf_getblock): Open potentially blocking event object here and check its signal state if it's a BSD flock lock. (lf_wakelock): Get file handle as additional parameter. * fork.cc (frok::child): Drop call to fixup_lockf_after_fork. * ntdll.h (struct _EVENT_BASIC_INFORMATION): Define. (enum _EVENT_INFORMATION_CLASS): Define. (NtQueryEvent): Declare. * fhandler.h (fhandler_base::fs_flags): Remove. (fhandler_base::set_fs_flags): Remove. (fhandler_base::get_fs_flags): Remove. * fhandler.cc (fhandler_base::write): Check for sparse file using pc.fs_flags(). * fhandler_disk_file.cc (fhandler_disk_file::ftruncate): Ditto. The return of the volume serial number in fs_info. * fhandler.h (get_dev): New method. * fhandler_disk_file.cc (fhandler_base::fstat_by_handle): Drop call to NtQueryVolumeInformationFile(FileFsVolumeInformation). Just use get_dev() method. * fhandler_fifo.cc (fhandler_fifo::open) Use device ID and inode number to generate fifo name. * path.h (fs_info::sernum): New member. (fs_info::serial_number): New method. (path_conv::fs_serial_number): New method. * path.cc (fs_info::update): Fetch volume serial number and store in sernum.
2008-04-01 02:03:25 +08:00
/* As on Linux: POSIX locks and BSD flock locks don't interact. */
|| (lf->lf_flags & (F_POSIX | F_FLOCK))
!= (lock->lf_flags & (F_POSIX | F_FLOCK)))
{
*prev = &lf->lf_next;
*overlap = lf = lf->lf_next;
continue;
}
/*
* OK, check for overlap
*
* Six cases:
* 0) no overlap
* 1) overlap == lock
* 2) overlap contains lock
* 3) lock contains overlap
* 4) overlap starts before lock
* 5) overlap ends after lock
*/
if ((lf->lf_end != -1 && start > lf->lf_end) ||
(end != -1 && lf->lf_start > end))
{
/* Case 0 */
if ((type & SELF) && end != -1 && lf->lf_start > end)
return 0;
*prev = &lf->lf_next;
*overlap = lf = lf->lf_next;
continue;
}
if ((lf->lf_start == start) && (lf->lf_end == end))
{
/* Case 1 */
return 1;
}
if ((lf->lf_start <= start) && (end != -1) &&
((lf->lf_end >= end) || (lf->lf_end == -1)))
{
/* Case 2 */
return 2;
}
if (start <= lf->lf_start && (end == -1 ||
(lf->lf_end != -1 && end >= lf->lf_end)))
{
/* Case 3 */
return 3;
}
if ((lf->lf_start < start) &&
((lf->lf_end >= start) || (lf->lf_end == -1)))
{
/* Case 4 */
return 4;
}
if ((lf->lf_start > start) && (end != -1) &&
((lf->lf_end > end) || (lf->lf_end == -1)))
{
/* Case 5 */
return 5;
}
api_fatal ("lf_findoverlap: default\n");
}
return 0;
}
/*
* Split a lock and a contained region into
* two or three locks as necessary.
*/
static void
lf_split (lockf_t *lock1, lockf_t *lock2, lockf_t **split)
{
lockf_t *splitlock;
/*
* Check to see if spliting into only two pieces.
*/
if (lock1->lf_start == lock2->lf_start)
{
lock1->lf_start = lock2->lf_end + 1;
lock2->lf_next = lock1;
return;
}
if (lock1->lf_end == lock2->lf_end)
{
lock1->lf_end = lock2->lf_start - 1;
lock2->lf_next = lock1->lf_next;
lock1->lf_next = lock2;
return;
}
/*
* Make a new lock consisting of the last part of
* the encompassing lock. We use the preallocated
* splitlock so we don't have to block.
*/
splitlock = *split;
assert (splitlock != NULL);
*split = splitlock->lf_next;
memcpy (splitlock, lock1, sizeof *splitlock);
/* We have to unset the obj HANDLE here which has been copied by the
above memcpy, so that the calling function recognizes the new object.
See post-lf_split handling in lf_setlock and lf_clearlock. */
splitlock->lf_obj = NULL;
splitlock->lf_start = lock2->lf_end + 1;
lock1->lf_end = lock2->lf_start - 1;
/*
* OK, now link it in
*/
splitlock->lf_next = lock1->lf_next;
lock2->lf_next = splitlock;
lock1->lf_next = lock2;
}
/*
* Wakeup a blocklist
* Cygwin: Just signal the lock which gets removed. This unblocks
* all threads waiting for this lock.
*/
static void
* smallprint.cc (__small_vswprintf): Fix uninitialized usage of `w'. Revamp advisory file locking to avoid cross reference pointers as well as to allow BSD flock semantics. More agressively delete unused nodes and sync objects. * fhandler.h (fhandler_base::ino): Rename from namehash. Fix comment. (fhandler_base::node): Remove. (fhandler_base::unique_id): Add. (fhandler_base::del_my_locks): New method. (get_ino): Rename from get_namehash. Change usage throughout Cygwin. (get_unique_id): New method. * fhandler.cc (fhandler_base::close): Call own del_my_locks method. Fix comment. (fhandler_base::fhandler_base): Accommodate new and changed members. (fhandler_base::fixup_after_fork): Call del_my_locks. (fhandler_base::fixup_after_exec): Ditto for files with close-on-exec flag set. * fhandler_disk_file.cc (get_ino_by_handle): Rename from readdir_get_ino_by_handle. Accommodate throughout. (fhandler_base::open_fs): Fill ino with inode number if FS has good inodes. Allocate a LUID and store in unique_id to recognize file descriptors referencing the same file object. * flock.cc: Drop flock TODO comments. Use explicit types __dev32_t and __ino64_t instead of dev_t and ino_t. (LOCK_OBJ_NAME_LEN): Change to reflect longer lf_id length. (get_obj_handle_count): New method. (lockf_t::lf_id): Change type to long long. (inode_t::get_lock_obj_handle_count): Drop in favor of static function get_obj_handle_count. (inode_t::del_locks): Remove. (inode_t::get): Add create_if_missing flag argument. (inode_t::del_my_locks): Reimplement to handle POSIX and BSD flock locks. Return if node can be deleted or not. (inode_t::~inode_t): Ditto. Close handles to i_dir and i_mtx. (fixup_lockf_after_fork): Remove. (fhandler_base::del_my_locks): New method. (fixup_lockf_after_exec): Check if node can be deleted. (inode_t::get): Only create node if create_if_missing is set. Lock the returned node here before unlocking the node list. (inode_t::get_all_locks_list): Accommodate new lf_id length. (inode_t::create_lock_obj): Ditto. (lockf_t::open_lock_obj): Ditto. Change return type to bool. De-const. Set lf_obj instead of returning a handle. (lockf_t::del_lock_obj): Call SetEvent only if new incoming parameters allow it. Explain how it's supposed to work. (fhandler_disk_file::lock): Only fetch file length in SEEK_END case. Use NtQueryInformationFile(FileStandardInformation) instead of calling fstat_by_handle. Always unlock node before returning. Use fhandler's unique id to create lf_id for BSD flock locks. Rely on node lock from inode_t::get. Call del_lock_obj on removed locks here to allow explicit unlocking. Delete node if no lock exists on the file anymore. (lf_setlock): Get file handle as additional parameter. Handle the fact that lf_getblock now always opens the attached event object. Reactivate erroneously applied patch which deactivates setting thread priority. Additionally handle blocking on BSD flock locks. (lf_clearlock): Get file handle as additional parameter. (lf_getlock): Close event handle opened by lf_getblock. (lf_getblock): Open potentially blocking event object here and check its signal state if it's a BSD flock lock. (lf_wakelock): Get file handle as additional parameter. * fork.cc (frok::child): Drop call to fixup_lockf_after_fork. * ntdll.h (struct _EVENT_BASIC_INFORMATION): Define. (enum _EVENT_INFORMATION_CLASS): Define. (NtQueryEvent): Declare. * fhandler.h (fhandler_base::fs_flags): Remove. (fhandler_base::set_fs_flags): Remove. (fhandler_base::get_fs_flags): Remove. * fhandler.cc (fhandler_base::write): Check for sparse file using pc.fs_flags(). * fhandler_disk_file.cc (fhandler_disk_file::ftruncate): Ditto. The return of the volume serial number in fs_info. * fhandler.h (get_dev): New method. * fhandler_disk_file.cc (fhandler_base::fstat_by_handle): Drop call to NtQueryVolumeInformationFile(FileFsVolumeInformation). Just use get_dev() method. * fhandler_fifo.cc (fhandler_fifo::open) Use device ID and inode number to generate fifo name. * path.h (fs_info::sernum): New member. (fs_info::serial_number): New method. (path_conv::fs_serial_number): New method. * path.cc (fs_info::update): Fetch volume serial number and store in sernum.
2008-04-01 02:03:25 +08:00
lf_wakelock (lockf_t *listhead, HANDLE fhdl)
{
* smallprint.cc (__small_vswprintf): Fix uninitialized usage of `w'. Revamp advisory file locking to avoid cross reference pointers as well as to allow BSD flock semantics. More agressively delete unused nodes and sync objects. * fhandler.h (fhandler_base::ino): Rename from namehash. Fix comment. (fhandler_base::node): Remove. (fhandler_base::unique_id): Add. (fhandler_base::del_my_locks): New method. (get_ino): Rename from get_namehash. Change usage throughout Cygwin. (get_unique_id): New method. * fhandler.cc (fhandler_base::close): Call own del_my_locks method. Fix comment. (fhandler_base::fhandler_base): Accommodate new and changed members. (fhandler_base::fixup_after_fork): Call del_my_locks. (fhandler_base::fixup_after_exec): Ditto for files with close-on-exec flag set. * fhandler_disk_file.cc (get_ino_by_handle): Rename from readdir_get_ino_by_handle. Accommodate throughout. (fhandler_base::open_fs): Fill ino with inode number if FS has good inodes. Allocate a LUID and store in unique_id to recognize file descriptors referencing the same file object. * flock.cc: Drop flock TODO comments. Use explicit types __dev32_t and __ino64_t instead of dev_t and ino_t. (LOCK_OBJ_NAME_LEN): Change to reflect longer lf_id length. (get_obj_handle_count): New method. (lockf_t::lf_id): Change type to long long. (inode_t::get_lock_obj_handle_count): Drop in favor of static function get_obj_handle_count. (inode_t::del_locks): Remove. (inode_t::get): Add create_if_missing flag argument. (inode_t::del_my_locks): Reimplement to handle POSIX and BSD flock locks. Return if node can be deleted or not. (inode_t::~inode_t): Ditto. Close handles to i_dir and i_mtx. (fixup_lockf_after_fork): Remove. (fhandler_base::del_my_locks): New method. (fixup_lockf_after_exec): Check if node can be deleted. (inode_t::get): Only create node if create_if_missing is set. Lock the returned node here before unlocking the node list. (inode_t::get_all_locks_list): Accommodate new lf_id length. (inode_t::create_lock_obj): Ditto. (lockf_t::open_lock_obj): Ditto. Change return type to bool. De-const. Set lf_obj instead of returning a handle. (lockf_t::del_lock_obj): Call SetEvent only if new incoming parameters allow it. Explain how it's supposed to work. (fhandler_disk_file::lock): Only fetch file length in SEEK_END case. Use NtQueryInformationFile(FileStandardInformation) instead of calling fstat_by_handle. Always unlock node before returning. Use fhandler's unique id to create lf_id for BSD flock locks. Rely on node lock from inode_t::get. Call del_lock_obj on removed locks here to allow explicit unlocking. Delete node if no lock exists on the file anymore. (lf_setlock): Get file handle as additional parameter. Handle the fact that lf_getblock now always opens the attached event object. Reactivate erroneously applied patch which deactivates setting thread priority. Additionally handle blocking on BSD flock locks. (lf_clearlock): Get file handle as additional parameter. (lf_getlock): Close event handle opened by lf_getblock. (lf_getblock): Open potentially blocking event object here and check its signal state if it's a BSD flock lock. (lf_wakelock): Get file handle as additional parameter. * fork.cc (frok::child): Drop call to fixup_lockf_after_fork. * ntdll.h (struct _EVENT_BASIC_INFORMATION): Define. (enum _EVENT_INFORMATION_CLASS): Define. (NtQueryEvent): Declare. * fhandler.h (fhandler_base::fs_flags): Remove. (fhandler_base::set_fs_flags): Remove. (fhandler_base::get_fs_flags): Remove. * fhandler.cc (fhandler_base::write): Check for sparse file using pc.fs_flags(). * fhandler_disk_file.cc (fhandler_disk_file::ftruncate): Ditto. The return of the volume serial number in fs_info. * fhandler.h (get_dev): New method. * fhandler_disk_file.cc (fhandler_base::fstat_by_handle): Drop call to NtQueryVolumeInformationFile(FileFsVolumeInformation). Just use get_dev() method. * fhandler_fifo.cc (fhandler_fifo::open) Use device ID and inode number to generate fifo name. * path.h (fs_info::sernum): New member. (fs_info::serial_number): New method. (path_conv::fs_serial_number): New method. * path.cc (fs_info::update): Fetch volume serial number and store in sernum.
2008-04-01 02:03:25 +08:00
listhead->del_lock_obj (fhdl, true);
}
extern "C" int
flock (int fd, int operation)
{
int res = -1;
int cmd;
2013-04-23 17:44:36 +08:00
struct flock fl = { 0, SEEK_SET, 0, 0, 0 };
* Throughout, use __try/__except/__endtry blocks, rather than myfault handler. * cygtls.cc (_cygtls::remove): Accommodate the fact that pathbufs has been moved from _local_storage to _cygtls. * cygtls.h (class tls_pathbuf): Add comment to hint to gendef usage of counters. Change type of counters to uint32_t for clarity. Remove _cygtls as friend class. (struct _local_storage): Move pathbufs from here... (struct _cygtls): ...to here, allowing to access it from _sigbe. (class san): Only define on 32 bit. Remove errno, _c_cnt and _w_cnt members. (san::setup): Drop parameter. Don't initialize removed members. (san::leave): Don't set removed members. (class myfault): Only define on 32 bit. (myfault::faulted): Only keep implementation not taking any parameter. Drop argument in call to sebastian.setup. (__try/__leave/__except/__endtry): Implement to support real SEH. For now stick to SJLJ on 32 bit. * dcrt0.cc (dll_crt0_0): Drop 64 bit call to exception::install_myfault_handler. * exception.h (exception_handler): Define with EXCEPTION_DISPOSITION as return type. (PDISPATCHER_CONTEXT): Define as void * on 32 bit. Define as pointer to _DISPATCHER_CONTEXT on 64 bit. (class exception): Define separately for 32 and 64 bit. (exception::myfault): Add handler for myfault SEH handling on 64 bit. (exception::exception): Fix mangled method name to account for change in type of last parameter. (exception::install_myfault_handler): Remove. * exceptions.cc (exception::myfault_handle): Remove. (exception::myfault): New SEH handler for 64 bit. * gendef (_sigbe): Set tls_pathbuf counters to 0 explicitely when returning to the caller. * ntdll.h: Move a comment to a better place. (struct _SCOPE_TABLE): Define on 64 bit. * thread.cc (verifyable_object_isvalid): Remove gcc 4.7 workaround. * tls_pbuf.cc (tls_pbuf): Fix to accommodate new place of pathbufs. (tls_pathbuf::destroy): Change type of loop variables to uint32_t. * tls_pbuf.h (class tmp_pathbuf): Change type of buffer counters to uint32_t. Accommodate new place of pathbufs. * tlsoffsets.h: Regenerate. * tlsoffsets64.h: Regenerate.
2014-08-22 17:21:33 +08:00
__try
{
cygheap_fdget cfd (fd);
* Throughout, use __try/__except/__endtry blocks, rather than myfault handler. * cygtls.cc (_cygtls::remove): Accommodate the fact that pathbufs has been moved from _local_storage to _cygtls. * cygtls.h (class tls_pathbuf): Add comment to hint to gendef usage of counters. Change type of counters to uint32_t for clarity. Remove _cygtls as friend class. (struct _local_storage): Move pathbufs from here... (struct _cygtls): ...to here, allowing to access it from _sigbe. (class san): Only define on 32 bit. Remove errno, _c_cnt and _w_cnt members. (san::setup): Drop parameter. Don't initialize removed members. (san::leave): Don't set removed members. (class myfault): Only define on 32 bit. (myfault::faulted): Only keep implementation not taking any parameter. Drop argument in call to sebastian.setup. (__try/__leave/__except/__endtry): Implement to support real SEH. For now stick to SJLJ on 32 bit. * dcrt0.cc (dll_crt0_0): Drop 64 bit call to exception::install_myfault_handler. * exception.h (exception_handler): Define with EXCEPTION_DISPOSITION as return type. (PDISPATCHER_CONTEXT): Define as void * on 32 bit. Define as pointer to _DISPATCHER_CONTEXT on 64 bit. (class exception): Define separately for 32 and 64 bit. (exception::myfault): Add handler for myfault SEH handling on 64 bit. (exception::exception): Fix mangled method name to account for change in type of last parameter. (exception::install_myfault_handler): Remove. * exceptions.cc (exception::myfault_handle): Remove. (exception::myfault): New SEH handler for 64 bit. * gendef (_sigbe): Set tls_pathbuf counters to 0 explicitely when returning to the caller. * ntdll.h: Move a comment to a better place. (struct _SCOPE_TABLE): Define on 64 bit. * thread.cc (verifyable_object_isvalid): Remove gcc 4.7 workaround. * tls_pbuf.cc (tls_pbuf): Fix to accommodate new place of pathbufs. (tls_pathbuf::destroy): Change type of loop variables to uint32_t. * tls_pbuf.h (class tmp_pathbuf): Change type of buffer counters to uint32_t. Accommodate new place of pathbufs. * tlsoffsets.h: Regenerate. * tlsoffsets64.h: Regenerate.
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if (cfd < 0)
__leave;
cmd = (operation & LOCK_NB) ? F_SETLK : F_SETLKW;
switch (operation & (~LOCK_NB))
{
case LOCK_EX:
fl.l_type = F_WRLCK;
break;
case LOCK_SH:
fl.l_type = F_RDLCK;
break;
case LOCK_UN:
fl.l_type = F_UNLCK;
break;
default:
set_errno (EINVAL);
__leave;
}
if (!cfd->mandatory_locking ())
fl.l_type |= F_FLOCK;
res = cfd->mandatory_locking () ? cfd->mand_lock (cmd, &fl)
: cfd->lock (cmd, &fl);
if ((res == -1) && ((get_errno () == EAGAIN) || (get_errno () == EACCES)))
set_errno (EWOULDBLOCK);
}
* Throughout, use __try/__except/__endtry blocks, rather than myfault handler. * cygtls.cc (_cygtls::remove): Accommodate the fact that pathbufs has been moved from _local_storage to _cygtls. * cygtls.h (class tls_pathbuf): Add comment to hint to gendef usage of counters. Change type of counters to uint32_t for clarity. Remove _cygtls as friend class. (struct _local_storage): Move pathbufs from here... (struct _cygtls): ...to here, allowing to access it from _sigbe. (class san): Only define on 32 bit. Remove errno, _c_cnt and _w_cnt members. (san::setup): Drop parameter. Don't initialize removed members. (san::leave): Don't set removed members. (class myfault): Only define on 32 bit. (myfault::faulted): Only keep implementation not taking any parameter. Drop argument in call to sebastian.setup. (__try/__leave/__except/__endtry): Implement to support real SEH. For now stick to SJLJ on 32 bit. * dcrt0.cc (dll_crt0_0): Drop 64 bit call to exception::install_myfault_handler. * exception.h (exception_handler): Define with EXCEPTION_DISPOSITION as return type. (PDISPATCHER_CONTEXT): Define as void * on 32 bit. Define as pointer to _DISPATCHER_CONTEXT on 64 bit. (class exception): Define separately for 32 and 64 bit. (exception::myfault): Add handler for myfault SEH handling on 64 bit. (exception::exception): Fix mangled method name to account for change in type of last parameter. (exception::install_myfault_handler): Remove. * exceptions.cc (exception::myfault_handle): Remove. (exception::myfault): New SEH handler for 64 bit. * gendef (_sigbe): Set tls_pathbuf counters to 0 explicitely when returning to the caller. * ntdll.h: Move a comment to a better place. (struct _SCOPE_TABLE): Define on 64 bit. * thread.cc (verifyable_object_isvalid): Remove gcc 4.7 workaround. * tls_pbuf.cc (tls_pbuf): Fix to accommodate new place of pathbufs. (tls_pathbuf::destroy): Change type of loop variables to uint32_t. * tls_pbuf.h (class tmp_pathbuf): Change type of buffer counters to uint32_t. Accommodate new place of pathbufs. * tlsoffsets.h: Regenerate. * tlsoffsets64.h: Regenerate.
2014-08-22 17:21:33 +08:00
__except (EFAULT) {}
__endtry
syscall_printf ("%R = flock(%d, %d)", res, fd, operation);
return res;
}
extern "C" int
2013-04-23 17:44:36 +08:00
lockf (int filedes, int function, off_t size)
{
int res = -1;
int cmd;
2013-04-23 17:44:36 +08:00
struct flock fl;
pthread_testcancel ();
* Throughout, use __try/__except/__endtry blocks, rather than myfault handler. * cygtls.cc (_cygtls::remove): Accommodate the fact that pathbufs has been moved from _local_storage to _cygtls. * cygtls.h (class tls_pathbuf): Add comment to hint to gendef usage of counters. Change type of counters to uint32_t for clarity. Remove _cygtls as friend class. (struct _local_storage): Move pathbufs from here... (struct _cygtls): ...to here, allowing to access it from _sigbe. (class san): Only define on 32 bit. Remove errno, _c_cnt and _w_cnt members. (san::setup): Drop parameter. Don't initialize removed members. (san::leave): Don't set removed members. (class myfault): Only define on 32 bit. (myfault::faulted): Only keep implementation not taking any parameter. Drop argument in call to sebastian.setup. (__try/__leave/__except/__endtry): Implement to support real SEH. For now stick to SJLJ on 32 bit. * dcrt0.cc (dll_crt0_0): Drop 64 bit call to exception::install_myfault_handler. * exception.h (exception_handler): Define with EXCEPTION_DISPOSITION as return type. (PDISPATCHER_CONTEXT): Define as void * on 32 bit. Define as pointer to _DISPATCHER_CONTEXT on 64 bit. (class exception): Define separately for 32 and 64 bit. (exception::myfault): Add handler for myfault SEH handling on 64 bit. (exception::exception): Fix mangled method name to account for change in type of last parameter. (exception::install_myfault_handler): Remove. * exceptions.cc (exception::myfault_handle): Remove. (exception::myfault): New SEH handler for 64 bit. * gendef (_sigbe): Set tls_pathbuf counters to 0 explicitely when returning to the caller. * ntdll.h: Move a comment to a better place. (struct _SCOPE_TABLE): Define on 64 bit. * thread.cc (verifyable_object_isvalid): Remove gcc 4.7 workaround. * tls_pbuf.cc (tls_pbuf): Fix to accommodate new place of pathbufs. (tls_pathbuf::destroy): Change type of loop variables to uint32_t. * tls_pbuf.h (class tmp_pathbuf): Change type of buffer counters to uint32_t. Accommodate new place of pathbufs. * tlsoffsets.h: Regenerate. * tlsoffsets64.h: Regenerate.
2014-08-22 17:21:33 +08:00
__try
{
cygheap_fdget cfd (filedes);
* Throughout, use __try/__except/__endtry blocks, rather than myfault handler. * cygtls.cc (_cygtls::remove): Accommodate the fact that pathbufs has been moved from _local_storage to _cygtls. * cygtls.h (class tls_pathbuf): Add comment to hint to gendef usage of counters. Change type of counters to uint32_t for clarity. Remove _cygtls as friend class. (struct _local_storage): Move pathbufs from here... (struct _cygtls): ...to here, allowing to access it from _sigbe. (class san): Only define on 32 bit. Remove errno, _c_cnt and _w_cnt members. (san::setup): Drop parameter. Don't initialize removed members. (san::leave): Don't set removed members. (class myfault): Only define on 32 bit. (myfault::faulted): Only keep implementation not taking any parameter. Drop argument in call to sebastian.setup. (__try/__leave/__except/__endtry): Implement to support real SEH. For now stick to SJLJ on 32 bit. * dcrt0.cc (dll_crt0_0): Drop 64 bit call to exception::install_myfault_handler. * exception.h (exception_handler): Define with EXCEPTION_DISPOSITION as return type. (PDISPATCHER_CONTEXT): Define as void * on 32 bit. Define as pointer to _DISPATCHER_CONTEXT on 64 bit. (class exception): Define separately for 32 and 64 bit. (exception::myfault): Add handler for myfault SEH handling on 64 bit. (exception::exception): Fix mangled method name to account for change in type of last parameter. (exception::install_myfault_handler): Remove. * exceptions.cc (exception::myfault_handle): Remove. (exception::myfault): New SEH handler for 64 bit. * gendef (_sigbe): Set tls_pathbuf counters to 0 explicitely when returning to the caller. * ntdll.h: Move a comment to a better place. (struct _SCOPE_TABLE): Define on 64 bit. * thread.cc (verifyable_object_isvalid): Remove gcc 4.7 workaround. * tls_pbuf.cc (tls_pbuf): Fix to accommodate new place of pathbufs. (tls_pathbuf::destroy): Change type of loop variables to uint32_t. * tls_pbuf.h (class tmp_pathbuf): Change type of buffer counters to uint32_t. Accommodate new place of pathbufs. * tlsoffsets.h: Regenerate. * tlsoffsets64.h: Regenerate.
2014-08-22 17:21:33 +08:00
if (cfd < 0)
__leave;
* Throughout, use __try/__except/__endtry blocks, rather than myfault handler. * cygtls.cc (_cygtls::remove): Accommodate the fact that pathbufs has been moved from _local_storage to _cygtls. * cygtls.h (class tls_pathbuf): Add comment to hint to gendef usage of counters. Change type of counters to uint32_t for clarity. Remove _cygtls as friend class. (struct _local_storage): Move pathbufs from here... (struct _cygtls): ...to here, allowing to access it from _sigbe. (class san): Only define on 32 bit. Remove errno, _c_cnt and _w_cnt members. (san::setup): Drop parameter. Don't initialize removed members. (san::leave): Don't set removed members. (class myfault): Only define on 32 bit. (myfault::faulted): Only keep implementation not taking any parameter. Drop argument in call to sebastian.setup. (__try/__leave/__except/__endtry): Implement to support real SEH. For now stick to SJLJ on 32 bit. * dcrt0.cc (dll_crt0_0): Drop 64 bit call to exception::install_myfault_handler. * exception.h (exception_handler): Define with EXCEPTION_DISPOSITION as return type. (PDISPATCHER_CONTEXT): Define as void * on 32 bit. Define as pointer to _DISPATCHER_CONTEXT on 64 bit. (class exception): Define separately for 32 and 64 bit. (exception::myfault): Add handler for myfault SEH handling on 64 bit. (exception::exception): Fix mangled method name to account for change in type of last parameter. (exception::install_myfault_handler): Remove. * exceptions.cc (exception::myfault_handle): Remove. (exception::myfault): New SEH handler for 64 bit. * gendef (_sigbe): Set tls_pathbuf counters to 0 explicitely when returning to the caller. * ntdll.h: Move a comment to a better place. (struct _SCOPE_TABLE): Define on 64 bit. * thread.cc (verifyable_object_isvalid): Remove gcc 4.7 workaround. * tls_pbuf.cc (tls_pbuf): Fix to accommodate new place of pathbufs. (tls_pathbuf::destroy): Change type of loop variables to uint32_t. * tls_pbuf.h (class tmp_pathbuf): Change type of buffer counters to uint32_t. Accommodate new place of pathbufs. * tlsoffsets.h: Regenerate. * tlsoffsets64.h: Regenerate.
2014-08-22 17:21:33 +08:00
fl.l_start = 0;
fl.l_len = size;
fl.l_whence = SEEK_CUR;
* Throughout, use __try/__except/__endtry blocks, rather than myfault handler. * cygtls.cc (_cygtls::remove): Accommodate the fact that pathbufs has been moved from _local_storage to _cygtls. * cygtls.h (class tls_pathbuf): Add comment to hint to gendef usage of counters. Change type of counters to uint32_t for clarity. Remove _cygtls as friend class. (struct _local_storage): Move pathbufs from here... (struct _cygtls): ...to here, allowing to access it from _sigbe. (class san): Only define on 32 bit. Remove errno, _c_cnt and _w_cnt members. (san::setup): Drop parameter. Don't initialize removed members. (san::leave): Don't set removed members. (class myfault): Only define on 32 bit. (myfault::faulted): Only keep implementation not taking any parameter. Drop argument in call to sebastian.setup. (__try/__leave/__except/__endtry): Implement to support real SEH. For now stick to SJLJ on 32 bit. * dcrt0.cc (dll_crt0_0): Drop 64 bit call to exception::install_myfault_handler. * exception.h (exception_handler): Define with EXCEPTION_DISPOSITION as return type. (PDISPATCHER_CONTEXT): Define as void * on 32 bit. Define as pointer to _DISPATCHER_CONTEXT on 64 bit. (class exception): Define separately for 32 and 64 bit. (exception::myfault): Add handler for myfault SEH handling on 64 bit. (exception::exception): Fix mangled method name to account for change in type of last parameter. (exception::install_myfault_handler): Remove. * exceptions.cc (exception::myfault_handle): Remove. (exception::myfault): New SEH handler for 64 bit. * gendef (_sigbe): Set tls_pathbuf counters to 0 explicitely when returning to the caller. * ntdll.h: Move a comment to a better place. (struct _SCOPE_TABLE): Define on 64 bit. * thread.cc (verifyable_object_isvalid): Remove gcc 4.7 workaround. * tls_pbuf.cc (tls_pbuf): Fix to accommodate new place of pathbufs. (tls_pathbuf::destroy): Change type of loop variables to uint32_t. * tls_pbuf.h (class tmp_pathbuf): Change type of buffer counters to uint32_t. Accommodate new place of pathbufs. * tlsoffsets.h: Regenerate. * tlsoffsets64.h: Regenerate.
2014-08-22 17:21:33 +08:00
switch (function)
{
case F_ULOCK:
cmd = F_SETLK;
fl.l_type = F_UNLCK;
break;
case F_LOCK:
cmd = F_SETLKW;
fl.l_type = F_WRLCK;
break;
case F_TLOCK:
cmd = F_SETLK;
fl.l_type = F_WRLCK;
break;
case F_TEST:
fl.l_type = F_WRLCK;
if (cfd->lock (F_GETLK, &fl) == -1)
__leave;
if (fl.l_type == F_UNLCK || fl.l_pid == getpid ())
res = 0;
else
errno = EAGAIN;
__leave;
/* NOTREACHED */
default:
errno = EINVAL;
__leave;
/* NOTREACHED */
}
res = cfd->mandatory_locking () ? cfd->mand_lock (cmd, &fl)
: cfd->lock (cmd, &fl);
}
* Throughout, use __try/__except/__endtry blocks, rather than myfault handler. * cygtls.cc (_cygtls::remove): Accommodate the fact that pathbufs has been moved from _local_storage to _cygtls. * cygtls.h (class tls_pathbuf): Add comment to hint to gendef usage of counters. Change type of counters to uint32_t for clarity. Remove _cygtls as friend class. (struct _local_storage): Move pathbufs from here... (struct _cygtls): ...to here, allowing to access it from _sigbe. (class san): Only define on 32 bit. Remove errno, _c_cnt and _w_cnt members. (san::setup): Drop parameter. Don't initialize removed members. (san::leave): Don't set removed members. (class myfault): Only define on 32 bit. (myfault::faulted): Only keep implementation not taking any parameter. Drop argument in call to sebastian.setup. (__try/__leave/__except/__endtry): Implement to support real SEH. For now stick to SJLJ on 32 bit. * dcrt0.cc (dll_crt0_0): Drop 64 bit call to exception::install_myfault_handler. * exception.h (exception_handler): Define with EXCEPTION_DISPOSITION as return type. (PDISPATCHER_CONTEXT): Define as void * on 32 bit. Define as pointer to _DISPATCHER_CONTEXT on 64 bit. (class exception): Define separately for 32 and 64 bit. (exception::myfault): Add handler for myfault SEH handling on 64 bit. (exception::exception): Fix mangled method name to account for change in type of last parameter. (exception::install_myfault_handler): Remove. * exceptions.cc (exception::myfault_handle): Remove. (exception::myfault): New SEH handler for 64 bit. * gendef (_sigbe): Set tls_pathbuf counters to 0 explicitely when returning to the caller. * ntdll.h: Move a comment to a better place. (struct _SCOPE_TABLE): Define on 64 bit. * thread.cc (verifyable_object_isvalid): Remove gcc 4.7 workaround. * tls_pbuf.cc (tls_pbuf): Fix to accommodate new place of pathbufs. (tls_pathbuf::destroy): Change type of loop variables to uint32_t. * tls_pbuf.h (class tmp_pathbuf): Change type of buffer counters to uint32_t. Accommodate new place of pathbufs. * tlsoffsets.h: Regenerate. * tlsoffsets64.h: Regenerate.
2014-08-22 17:21:33 +08:00
__except (EFAULT) {}
__endtry
syscall_printf ("%R = lockf(%d, %d, %D)", res, filedes, function, size);
return res;
}
/* This is the fcntl lock implementation for mandatory locks using the
Windows mandatory locking functions. For the UNIX-like advisory locking
implementation see the fhandler_disk_file::lock method earlier in this
file. */
struct lock_parms {
HANDLE h;
PIO_STATUS_BLOCK pio;
PLARGE_INTEGER poff;
PLARGE_INTEGER plen;
BOOL type;
NTSTATUS status;
};
static DWORD WINAPI
blocking_lock_thr (LPVOID param)
{
struct lock_parms *lp = (struct lock_parms *) param;
lp->status = NtLockFile (lp->h, NULL, NULL, NULL, lp->pio, lp->poff,
lp->plen, 0, FALSE, lp->type);
return 0;
}
int
fhandler_base::mand_lock (int, struct flock *)
{
set_errno (EINVAL);
return -1;
}
int
fhandler_disk_file::mand_lock (int a_op, struct flock *fl)
{
NTSTATUS status;
IO_STATUS_BLOCK io;
FILE_POSITION_INFORMATION fpi;
FILE_STANDARD_INFORMATION fsi;
off_t startpos;
LARGE_INTEGER offset;
LARGE_INTEGER length;
/* Calculate where to start from, then adjust this by fl->l_start. */
switch (fl->l_whence)
{
case SEEK_SET:
startpos = 0;
break;
case SEEK_CUR:
status = NtQueryInformationFile (get_handle (), &io, &fpi, sizeof fpi,
FilePositionInformation);
if (!NT_SUCCESS (status))
{
__seterrno_from_nt_status (status);
return -1;
}
startpos = fpi.CurrentByteOffset.QuadPart;
break;
case SEEK_END:
status = NtQueryInformationFile (get_handle (), &io, &fsi, sizeof fsi,
FileStandardInformation);
if (!NT_SUCCESS (status))
{
__seterrno_from_nt_status (status);
return -1;
}
startpos = fsi.EndOfFile.QuadPart;
break;
default:
set_errno (EINVAL);
return -1;
}
/* Adjust start and length until they make sense. */
offset.QuadPart = startpos + fl->l_start;
if (fl->l_len < 0)
{
offset.QuadPart -= fl->l_len;
length.QuadPart = -fl->l_len;
}
else
length.QuadPart = fl->l_len;
if (offset.QuadPart < 0)
{
length.QuadPart -= -offset.QuadPart;
if (length.QuadPart <= 0)
{
set_errno (EINVAL);
return -1;
}
offset.QuadPart = 0;
}
/* Special case if len == 0. For POSIX this means lock to the end of
the entire file, even when file grows later. */
if (length.QuadPart == 0)
length.QuadPart = UINT64_MAX;
/* Action! */
if (fl->l_type == F_UNLCK)
{
status = NtUnlockFile (get_handle (), &io, &offset, &length, 0);
if (status == STATUS_RANGE_NOT_LOCKED) /* Not an error */
status = STATUS_SUCCESS;
}
else if (a_op == F_SETLKW)
{
/* We open file handles synchronously. To allow asynchronous operation
the file locking functions require a file handle opened in asynchronous
mode. Since Windows locks are per-process/per-file object, we can't
open another handle asynchrously and lock/unlock using that handle:
The original file handle would not have placed the lock and would be
restricted by the lock like any other file handle.
So, what we do here is to start a thread which calls the potentially
blocking NtLockFile call. Then we wait for thread completion in an
interruptible fashion. */
OBJECT_ATTRIBUTES attr;
HANDLE evt;
struct lock_parms lp = { get_handle (), &io, &offset, &length,
fl->l_type == F_WRLCK, 0 };
cygthread *thr = NULL;
InitializeObjectAttributes (&attr, NULL, 0, NULL, NULL);
status = NtCreateEvent (&evt, EVENT_ALL_ACCESS, &attr,
NotificationEvent, FALSE);
if (evt)
thr = new cygthread (blocking_lock_thr, &lp, "blk_lock", evt);
if (!thr)
{
/* Thread creation failed. Fall back to blocking lock call. */
if (evt)
NtClose (evt);
status = NtLockFile (get_handle (), NULL, NULL, NULL, &io, &offset,
&length, 0, FALSE, fl->l_type == F_WRLCK);
}
else
{
/* F_SETLKW and lock cannot be established. Wait until the lock can
be established, or a signal request arrived. We deliberately
don't handle thread cancel requests here. */
DWORD wait_res = cygwait (evt, INFINITE, cw_sig | cw_sig_eintr);
NtClose (evt);
switch (wait_res)
{
case WAIT_OBJECT_0:
/* Fetch completion status. */
status = lp.status;
thr->detach ();
break;
default:
/* Signal arrived. */
/* Starting with Vista, CancelSynchronousIo works, and we wait
for the thread to exit. lp.status will be either
STATUS_SUCCESS, or STATUS_CANCELLED. We only call
NtUnlockFile in the first case.
Prior to Vista, CancelSynchronousIo doesn't exist, so we
terminated the thread and always call NtUnlockFile since
lp.status was 0 to begin with. */
if (CancelSynchronousIo (thr->thread_handle ()))
thr->detach ();
else
thr->terminate_thread ();
if (NT_SUCCESS (lp.status))
NtUnlockFile (get_handle (), &io, &offset, &length, 0);
/* Per SUSv4: If a signal is received while fcntl is waiting,
fcntl shall be interrupted. Upon return from the signal
handler, fcntl shall return -1 with errno set to EINTR,
and the lock operation shall not be done. */
_my_tls.call_signal_handler ();
set_errno (EINTR);
return -1;
}
}
}
else
{
status = NtLockFile (get_handle (), NULL, NULL, NULL, &io, &offset,
&length, 0, TRUE, fl->l_type == F_WRLCK);
if (a_op == F_GETLK)
{
/* This is non-atomic, but there's no other way on Windows to detect
if another lock is blocking our lock, other than trying to place
the lock, and then having to unlock it again. */
if (NT_SUCCESS (status))
{
NtUnlockFile (get_handle (), &io, &offset, &length, 0);
fl->l_type = F_UNLCK;
}
else
{
/* FAKE! FAKE! FAKE! */
fl->l_type = F_WRLCK;
fl->l_whence = SEEK_SET;
fl->l_start = offset.QuadPart;
fl->l_len = length.QuadPart;
fl->l_pid = (pid_t) -1;
}
status = STATUS_SUCCESS;
}
}
if (!NT_SUCCESS (status))
{
__seterrno_from_nt_status (status);
return -1;
}
return 0;
}