newlib-cygwin/winsup/cygwin/nfs.cc

/* nfs.cc

   Copyright 2008, 2010 Red Hat, Inc.

This software is a copyrighted work licensed under the terms of the
Cygwin license.  Please consult the file "CYGWIN_LICENSE" for
details. */

#include "winsup.h"
#include "sys/fcntl.h"
#include "nfs.h"
#include "ntdll.h"

struct nfs_aol_ffei_t nfs_aol_ffei = { 0, 0, sizeof (NFS_ACT_ON_LINK) - 1, 0,
				       NFS_ACT_ON_LINK };

uint32_t nfs_type_mapping[] = { 0, S_IFREG, S_IFDIR, S_IFBLK,
				S_IFCHR, S_IFLNK, S_IFSOCK, S_IFIFO };

NTSTATUS
nfs_fetch_fattr3 (HANDLE h, fattr3 *fattr_buf)
{
  struct {
    FILE_FULL_EA_INFORMATION ffei;
    char buf[sizeof (NFS_V3_ATTR) + sizeof (fattr3)];
  } ffei_buf;
  struct {
     FILE_GET_EA_INFORMATION fgei;
     char buf[sizeof (NFS_V3_ATTR)];
  } fgei_buf;
  NTSTATUS status;
  IO_STATUS_BLOCK io;

  fgei_buf.fgei.NextEntryOffset = 0;
  fgei_buf.fgei.EaNameLength = sizeof (NFS_V3_ATTR) - 1;
  stpcpy (fgei_buf.fgei.EaName, NFS_V3_ATTR);
  status = NtQueryEaFile (h, &io, &ffei_buf.ffei, sizeof ffei_buf, TRUE,
			  &fgei_buf.fgei, sizeof fgei_buf, NULL, TRUE);
  if (NT_SUCCESS (status))
    {
      fattr3 *nfs_attr = (fattr3 *) (ffei_buf.ffei.EaName
				     + ffei_buf.ffei.EaNameLength + 1);
      if (fattr_buf)
	memcpy (fattr_buf, nfs_attr, sizeof (fattr3));
    }
  return status;
}
* Makefile.in (DLL_OFILES): Add nfs.o. * fhandler.cc (fhandler_base::open): Open files on NFS shares with correct access flags and EAs. * fhandler.h (fhandler_base::fstat_by_nfs_ea): Declare. * fhandler_disk_file.cc (fhandler_base::fstat_by_nfs_ea): New method. (fhandler_base::fstat_by_handle): Call fstat_by_nfs_ea for files on NFS shares. (fhandler_disk_file::fchmod): Use NFS specific method to set mode for files on NFS shares. Don't overrule errno from call to set_file_attribute with errno from NtSetInformationFile call. (fhandler_disk_file::fchown): Add comment. * mount.cc (fillout_mntent): Accommodate change in second parameter to fs_info::update. * nfs.cc: New file. * nfs.h: New file. * path.cc (fs_info::update): Take handle instead of bool as second parameter. Use that handle if it's not NULL. Only close handle if it has been opened here. Use static defined buffers instead of alloca'd buffers. (path_conv::check): Call symlink_info::check with reference to fs. Don't call fs.update here if file exists. (conv_path_list): Prefer tmp_pathbuf buffer over using alloca. (symlink_worker): Use NFS specific method to create symlinks on NFS shares. Prefer tmp_pathbuf buffer over using alloca. (symlink_info::check_shortcut): Reopen file from incoming handle with necessary FILE_GENERIC_READ flag. Prefer tmp_pathbuf buffer over using alloca. (symlink_info::check_sysfile): Ditto. (symlink_info::check_reparse_point): Use tmp_pathbuf buffer to allocate REPARSE_DATA_BUFFER. (symlink_info::check_nfs_symlink): New method. (enum symlink_t): Remove. (symlink_info::check): Don't use NtQueryAttributesFile. Rather, open file with necessary access flags and call NtQueryInformationFile. Fix error handling in case file can't be opened. For existing files, call fs_info::update here. Restructure symlink checking to accommodate the fact that the file is already open. Add case for NFS symlinks. * path.h (fs_info::update): Take handle instead of bool as second parameter. 2008-05-20 15:11:23 +00:00			`/* nfs.cc`

* fhandler_disk_file.cc (fhandler_base::fstat_by_nfs_ea): Simplify. Just call nfs_fetch_fattr3 if called via fstat. * nfs.cc (nfs_fetch_fattr3): New function to fetch NFS fattr3 info from file handle. * nfs.h (nfs_fetch_fattr3): Declare. * path.cc (symlink_info::check): Simplify NFS case. Just call nfs_fetch_fattr3. 2010-10-02 19:03:44 +00:00			`Copyright 2008, 2010 Red Hat, Inc.`
* Makefile.in (DLL_OFILES): Add nfs.o. * fhandler.cc (fhandler_base::open): Open files on NFS shares with correct access flags and EAs. * fhandler.h (fhandler_base::fstat_by_nfs_ea): Declare. * fhandler_disk_file.cc (fhandler_base::fstat_by_nfs_ea): New method. (fhandler_base::fstat_by_handle): Call fstat_by_nfs_ea for files on NFS shares. (fhandler_disk_file::fchmod): Use NFS specific method to set mode for files on NFS shares. Don't overrule errno from call to set_file_attribute with errno from NtSetInformationFile call. (fhandler_disk_file::fchown): Add comment. * mount.cc (fillout_mntent): Accommodate change in second parameter to fs_info::update. * nfs.cc: New file. * nfs.h: New file. * path.cc (fs_info::update): Take handle instead of bool as second parameter. Use that handle if it's not NULL. Only close handle if it has been opened here. Use static defined buffers instead of alloca'd buffers. (path_conv::check): Call symlink_info::check with reference to fs. Don't call fs.update here if file exists. (conv_path_list): Prefer tmp_pathbuf buffer over using alloca. (symlink_worker): Use NFS specific method to create symlinks on NFS shares. Prefer tmp_pathbuf buffer over using alloca. (symlink_info::check_shortcut): Reopen file from incoming handle with necessary FILE_GENERIC_READ flag. Prefer tmp_pathbuf buffer over using alloca. (symlink_info::check_sysfile): Ditto. (symlink_info::check_reparse_point): Use tmp_pathbuf buffer to allocate REPARSE_DATA_BUFFER. (symlink_info::check_nfs_symlink): New method. (enum symlink_t): Remove. (symlink_info::check): Don't use NtQueryAttributesFile. Rather, open file with necessary access flags and call NtQueryInformationFile. Fix error handling in case file can't be opened. For existing files, call fs_info::update here. Restructure symlink checking to accommodate the fact that the file is already open. Add case for NFS symlinks. * path.h (fs_info::update): Take handle instead of bool as second parameter. 2008-05-20 15:11:23 +00:00
			`This software is a copyrighted work licensed under the terms of the`
			`Cygwin license. Please consult the file "CYGWIN_LICENSE" for`
			`details. */`

			`#include "winsup.h"`
			`#include "sys/fcntl.h"`
			`#include "nfs.h"`
* fhandler_disk_file.cc (fhandler_base::fstat_by_nfs_ea): Simplify. Just call nfs_fetch_fattr3 if called via fstat. * nfs.cc (nfs_fetch_fattr3): New function to fetch NFS fattr3 info from file handle. * nfs.h (nfs_fetch_fattr3): Declare. * path.cc (symlink_info::check): Simplify NFS case. Just call nfs_fetch_fattr3. 2010-10-02 19:03:44 +00:00			`#include "ntdll.h"`
* Makefile.in (DLL_OFILES): Add nfs.o. * fhandler.cc (fhandler_base::open): Open files on NFS shares with correct access flags and EAs. * fhandler.h (fhandler_base::fstat_by_nfs_ea): Declare. * fhandler_disk_file.cc (fhandler_base::fstat_by_nfs_ea): New method. (fhandler_base::fstat_by_handle): Call fstat_by_nfs_ea for files on NFS shares. (fhandler_disk_file::fchmod): Use NFS specific method to set mode for files on NFS shares. Don't overrule errno from call to set_file_attribute with errno from NtSetInformationFile call. (fhandler_disk_file::fchown): Add comment. * mount.cc (fillout_mntent): Accommodate change in second parameter to fs_info::update. * nfs.cc: New file. * nfs.h: New file. * path.cc (fs_info::update): Take handle instead of bool as second parameter. Use that handle if it's not NULL. Only close handle if it has been opened here. Use static defined buffers instead of alloca'd buffers. (path_conv::check): Call symlink_info::check with reference to fs. Don't call fs.update here if file exists. (conv_path_list): Prefer tmp_pathbuf buffer over using alloca. (symlink_worker): Use NFS specific method to create symlinks on NFS shares. Prefer tmp_pathbuf buffer over using alloca. (symlink_info::check_shortcut): Reopen file from incoming handle with necessary FILE_GENERIC_READ flag. Prefer tmp_pathbuf buffer over using alloca. (symlink_info::check_sysfile): Ditto. (symlink_info::check_reparse_point): Use tmp_pathbuf buffer to allocate REPARSE_DATA_BUFFER. (symlink_info::check_nfs_symlink): New method. (enum symlink_t): Remove. (symlink_info::check): Don't use NtQueryAttributesFile. Rather, open file with necessary access flags and call NtQueryInformationFile. Fix error handling in case file can't be opened. For existing files, call fs_info::update here. Restructure symlink checking to accommodate the fact that the file is already open. Add case for NFS symlinks. * path.h (fs_info::update): Take handle instead of bool as second parameter. 2008-05-20 15:11:23 +00:00
			`struct nfs_aol_ffei_t nfs_aol_ffei = { 0, 0, sizeof (NFS_ACT_ON_LINK) - 1, 0,`
			`NFS_ACT_ON_LINK };`

			`uint32_t nfs_type_mapping[] = { 0, S_IFREG, S_IFDIR, S_IFBLK,`
Remove unneeded whitespace. * fhandler_fifo.cc (fhandler_fifo::open): Rework to cause errno to be set to ENXIO when opening a fifo write/nonblocking. * environ.cc (ucreqenv): Rename to ucenv. Move code from old ucenv here and conditionalize it on create_upcaseenv. (ucenv): Delete. (environ_init): Fix compiler warning by moving create_upcaseenv test to ucenv. Don't bother checking for child_proc_info when calling ucenv since it is assumed to be NULL at the point where the function is called. * path.cc (symlink_worker): Turn off MS-DOS path warnings when dealing with devices since the device handler passes in a translated MS-DOS path. * sec_auth.cc (lsaprivkeyauth): Avoid variable initialization which causes a compiler error. * fhandler_netdrive.cc: Update copyright. 2008-11-26 17:21:04 +00:00			`S_IFCHR, S_IFLNK, S_IFSOCK, S_IFIFO };`
* Makefile.in (DLL_OFILES): Add nfs.o. * fhandler.cc (fhandler_base::open): Open files on NFS shares with correct access flags and EAs. * fhandler.h (fhandler_base::fstat_by_nfs_ea): Declare. * fhandler_disk_file.cc (fhandler_base::fstat_by_nfs_ea): New method. (fhandler_base::fstat_by_handle): Call fstat_by_nfs_ea for files on NFS shares. (fhandler_disk_file::fchmod): Use NFS specific method to set mode for files on NFS shares. Don't overrule errno from call to set_file_attribute with errno from NtSetInformationFile call. (fhandler_disk_file::fchown): Add comment. * mount.cc (fillout_mntent): Accommodate change in second parameter to fs_info::update. * nfs.cc: New file. * nfs.h: New file. * path.cc (fs_info::update): Take handle instead of bool as second parameter. Use that handle if it's not NULL. Only close handle if it has been opened here. Use static defined buffers instead of alloca'd buffers. (path_conv::check): Call symlink_info::check with reference to fs. Don't call fs.update here if file exists. (conv_path_list): Prefer tmp_pathbuf buffer over using alloca. (symlink_worker): Use NFS specific method to create symlinks on NFS shares. Prefer tmp_pathbuf buffer over using alloca. (symlink_info::check_shortcut): Reopen file from incoming handle with necessary FILE_GENERIC_READ flag. Prefer tmp_pathbuf buffer over using alloca. (symlink_info::check_sysfile): Ditto. (symlink_info::check_reparse_point): Use tmp_pathbuf buffer to allocate REPARSE_DATA_BUFFER. (symlink_info::check_nfs_symlink): New method. (enum symlink_t): Remove. (symlink_info::check): Don't use NtQueryAttributesFile. Rather, open file with necessary access flags and call NtQueryInformationFile. Fix error handling in case file can't be opened. For existing files, call fs_info::update here. Restructure symlink checking to accommodate the fact that the file is already open. Add case for NFS symlinks. * path.h (fs_info::update): Take handle instead of bool as second parameter. 2008-05-20 15:11:23 +00:00
* fhandler_disk_file.cc (fhandler_base::fstat_by_nfs_ea): Simplify. Just call nfs_fetch_fattr3 if called via fstat. * nfs.cc (nfs_fetch_fattr3): New function to fetch NFS fattr3 info from file handle. * nfs.h (nfs_fetch_fattr3): Declare. * path.cc (symlink_info::check): Simplify NFS case. Just call nfs_fetch_fattr3. 2010-10-02 19:03:44 +00:00			`NTSTATUS`
			`nfs_fetch_fattr3 (HANDLE h, fattr3 *fattr_buf)`
			`{`
			`struct {`
			`FILE_FULL_EA_INFORMATION ffei;`
			`char buf[sizeof (NFS_V3_ATTR) + sizeof (fattr3)];`
			`} ffei_buf;`
			`struct {`
			`FILE_GET_EA_INFORMATION fgei;`
			`char buf[sizeof (NFS_V3_ATTR)];`
			`} fgei_buf;`
			`NTSTATUS status;`
			`IO_STATUS_BLOCK io;`

			`fgei_buf.fgei.NextEntryOffset = 0;`
			`fgei_buf.fgei.EaNameLength = sizeof (NFS_V3_ATTR) - 1;`
			`stpcpy (fgei_buf.fgei.EaName, NFS_V3_ATTR);`
			`status = NtQueryEaFile (h, &io, &ffei_buf.ffei, sizeof ffei_buf, TRUE,`
			`&fgei_buf.fgei, sizeof fgei_buf, NULL, TRUE);`
			`if (NT_SUCCESS (status))`
			`{`
			`fattr3 nfs_attr = (fattr3 ) (ffei_buf.ffei.EaName`
			`+ ffei_buf.ffei.EaNameLength + 1);`
			`if (fattr_buf)`
			`memcpy (fattr_buf, nfs_attr, sizeof (fattr3));`
			`}`
			`return status;`
			`}`