From: Jeff Layton <jeff.layton@xxxxxxxxxxxxxxx>
This patch has been added to the 4.1 stable tree. If you have any
objections, please let us know.
===============
[ Upstream commit 0752ba807b04ccd69cb4bc8bbf829a80ee208a3c ]
We don't clean out OFD locks on close(), so there's no need to check
for a race with them here. They'll get cleaned out at the same time
that flock locks are.
Signed-off-by: Jeff Layton <jeff.layton@xxxxxxxxxxxxxxx>
Acked-by: "J. Bruce Fields" <bfields@xxxxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxxxx>
---
fs/locks.c | 16 ++++++++++------
1 file changed, 10 insertions(+), 6 deletions(-)
diff --git a/fs/locks.c b/fs/locks.c
index 3c234b9fbdd9..af6fcf6e0dd0 100644
--- a/fs/locks.c
+++ b/fs/locks.c
@@ -2192,10 +2192,12 @@ int fcntl_setlk(unsigned int fd, struct file *filp, unsigned int cmd,
error = do_lock_file_wait(filp, cmd, file_lock);
/*
- * Attempt to detect a close/fcntl race and recover by
- * releasing the lock that was just acquired.
+ * Attempt to detect a close/fcntl race and recover by releasing the
+ * lock that was just acquired. There is no need to do that when we're
+ * unlocking though, or for OFD locks.
*/
- if (!error && file_lock->fl_type != F_UNLCK) {
+ if (!error && file_lock->fl_type != F_UNLCK &&
+ !(file_lock->fl_flags & FL_OFDLCK)) {
/*
* We need that spin_lock here - it prevents reordering between
* update of i_flctx->flc_posix and check for it done in
@@ -2334,10 +2336,12 @@ int fcntl_setlk64(unsigned int fd, struct file *filp, unsigned int cmd,
error = do_lock_file_wait(filp, cmd, file_lock);
/*
- * Attempt to detect a close/fcntl race and recover by
- * releasing the lock that was just acquired.
+ * Attempt to detect a close/fcntl race and recover by releasing the
+ * lock that was just acquired. There is no need to do that when we're
+ * unlocking though, or for OFD locks.
*/
- if (!error && file_lock->fl_type != F_UNLCK) {
+ if (!error && file_lock->fl_type != F_UNLCK &&
+ !(file_lock->fl_flags & FL_OFDLCK)) {
/*
* We need that spin_lock here - it prevents reordering between
* update of i_flctx->flc_posix and check for it done in
--
2.14.1