kernel.git/fs/cifs/file.c, branch linux-3.3.y

CIFS: Fix VFS lock usage for oplocked files

2012-04-13T16:13:54Z

commit 66189be74ff5f9f3fd6444315b85be210d07cef2 upstream. We can deadlock if we have a write oplock and two processes use the same file handle. In this case the first process can't unlock its lock if the second process blocked on the lock in the same time. Fix it by using posix_lock_file rather than posix_lock_file_wait under cinode->lock_mutex. If we request a blocking lock and posix_lock_file indicates that there is another lock that prevents us, wait untill that lock is released and restart our call. Acked-by: Jeff Layton Signed-off-by: Pavel Shilovsky Signed-off-by: Steve French Signed-off-by: Greg Kroah-Hartman

CIFS: Fix a spurious error in cifs_push_posix_locks

2012-04-02T17:32:07Z

commit ce85852b90a214cf577fc1b4f49d99fd7e98784a upstream. Signed-off-by: Pavel Shilovsky Reviewed-by: Jeff Layton Reported-by: Ben Hutchings Signed-off-by: Steve French Signed-off-by: Greg Kroah-Hartman

CIFS: Respect negotiated MaxMpxCount

2012-04-02T17:32:07Z

commit 10b9b98e41ba248a899f6175ce96ee91431b6194 upstream. Some servers sets this value less than 50 that was hardcoded and we lost the connection if when we exceed this limit. Fix this by respecting this value - not sending more than the server allows. Reviewed-by: Jeff Layton Signed-off-by: Pavel Shilovsky Signed-off-by: Steve French Signed-off-by: Greg Kroah-Hartman

CIFS: Do not kmalloc under the flocks spinlock

2012-03-07T03:50:15Z

Reorganize the code to make the memory already allocated before spinlock'ed loop. Cc: stable@vger.kernel.org Reviewed-by: Jeff Layton Signed-off-by: Pavel Shilovsky Signed-off-by: Steve French

CIFS: Add descriptions to the brlock cache functions

2011-12-09T04:04:47Z

Signed-off-by: Pavel Shilovsky Signed-off-by: Steve French

CIFS: Cleanup byte-range locking code style

2011-11-04T05:53:21Z

Reorder parms of cifs_lock_init, trivially simplify getlk code and remove extra {} in cifs_lock_add_if. Cc: Dan Carpenter Acked-by: Jeff Layton Signed-off-by: Pavel Shilovsky Signed-off-by: Steve French

CIFS: Simplify setlk error handling for mandatory locking

2011-11-04T05:53:15Z

Now we allocate a lock structure at first, then we request to the server and save the lock if server returned OK though void function - it prevents the situation when we locked a file on the server and then return -ENOMEM from setlk. Signed-off-by: Pavel Shilovsky Acked-by: Jeff Layton Signed-off-by: Steve French

CIFS: Fix the VFS brlock cache usage in posix locking case

2011-10-30T03:03:14Z

Request to the cache in FL_POSIX case only. Signed-off-by: Pavel Shilovsky Signed-off-by: Steve French

CIFS: Remove extra mutex_unlock in cifs_lock_add_if

2011-10-28T19:09:23Z

to prevent the mutex being unlocked twice if we interrupt a blocked lock. Signed-off-by: Pavel Shilovsky Signed-off-by: Steve French

CIFS: Make cifs_push_locks send as many locks at once as possible

2011-10-24T18:11:55Z

that reduces a traffic and increases a performance. Signed-off-by: Pavel Shilovsky Acked-by: Jeff Layton Signed-off-by: Steve French