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* flock.cc (inode_t::get_all_locks_list): Don't allow F_WAIT flag 

in lock event object name.
	(lockf_t::create_lock_obj): Ditto.
	(lockf_t::open_lock_obj): Ditto.
	(lf_setlock): Only check POSIX locks for deadlock condition.
	(lf_findoverlap): Don't let POSIX and flock locks interact.
This commit is contained in:
Corinna Vinschen 2008-03-24 20:11:55 +00:00
parent b9e2579c0f
commit 072030c3c5
2 changed files with 19 additions and 5 deletions
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9
winsup/cygwin/ChangeLog
View File

@ -1,3 +1,12 @@
2008-03-24 Corinna Vinschen <corinna@vinschen.de>
* flock.cc (inode_t::get_all_locks_list): Don't allow F_WAIT flag
in lock event object name.
(lockf_t::create_lock_obj): Ditto.
(lockf_t::open_lock_obj): Ditto.
(lf_setlock): Only check POSIX locks for deadlock condition.
(lf_findoverlap): Don't let POSIX and flock locks interact.
2008-03-24 Corinna Vinschen <corinna@vinschen.de>
* flock.cc: Clarify a couple of comments.

15
winsup/cygwin/flock.cc
View File

@ -509,7 +509,7 @@ inode_t::get_all_locks_list ()
lf_flags, lf_type, lf_start, lf_end, lf_id, lf_wid */
wc[LOCK_OBJ_NAME_LEN] = L'\0';
short flags = wcstol (wc, &endptr, 16);
if ((flags & ~(F_WAIT | F_FLOCK | F_POSIX)) != 0
if ((flags & ~(F_FLOCK | F_POSIX)) != 0
|| (flags & (F_FLOCK | F_POSIX) == (F_FLOCK | F_POSIX)))
continue;
short type = wcstol (endptr + 1, &endptr, 16);
@ -548,7 +548,8 @@ lockf_t::create_lock_obj ()
NTSTATUS status;
__small_swprintf (name, L"%02x-%01x-%016X-%016X-%08x-%08x",
lf_flags, lf_type, lf_start, lf_end, lf_id, lf_wid);
lf_flags & (F_POSIX | F_FLOCK), lf_type, lf_start,
lf_end, lf_id, lf_wid);
RtlInitCountedUnicodeString (&uname, name,
LOCK_OBJ_NAME_LEN * sizeof (WCHAR));
InitializeObjectAttributes (&attr, &uname, OBJ_INHERIT, lf_inode->i_dir,
@ -570,7 +571,8 @@ lockf_t::open_lock_obj () const
HANDLE obj;
__small_swprintf (name, L"%02x-%01x-%016X-%016X-%08x-%08x",
lf_flags, lf_type, lf_start, lf_end, lf_id, lf_wid);
lf_flags & (F_POSIX | F_FLOCK), lf_type, lf_start,
lf_end, lf_id, lf_wid);
RtlInitCountedUnicodeString (&uname, name,
LOCK_OBJ_NAME_LEN * sizeof (WCHAR));
InitializeObjectAttributes (&attr, &uname, OBJ_INHERIT, lf_inode->i_dir,
@ -867,7 +869,7 @@ lf_setlock (lockf_t *lock, inode_t *node, lockf_t **clean)
intelligent. If it turns out to be too dumb, we might
have to remove it or to find another method. */
for (lockf_t *lk = node->i_lockf; lk; lk = lk->lf_next)
if (lk->get_lock_obj_handle_count () > 1)
if ((lk->lf_flags & F_POSIX) && lk->get_lock_obj_handle_count () > 1)
return EDEADLK;
/*
@ -1204,7 +1206,10 @@ lf_findoverlap (lockf_t *lf, lockf_t *lock, int type, lockf_t ***prev,
end = lock->lf_end;
while (lf != NOLOCKF)
{
if ((type & OTHERS) && lf->lf_id == lock->lf_id)
if (((type & OTHERS) && lf->lf_id == lock->lf_id)
/* As on Linux: POSIX locks and 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;