lkml.org 
[lkml]   [2012]   [Mar]   [30]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
Subject[ 094/149] CIFS: Fix a spurious error in cifs_push_posix_locks
3.2-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Pavel Shilovsky <piastry@etersoft.ru>

commit ce85852b90a214cf577fc1b4f49d99fd7e98784a upstream.

Signed-off-by: Pavel Shilovsky <piastry@etersoft.ru>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Reported-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Steve French <sfrench@us.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
fs/cifs/file.c | 19 ++++++++++---------
1 file changed, 10 insertions(+), 9 deletions(-)

--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -960,9 +960,9 @@ cifs_push_posix_locks(struct cifsFileInf
INIT_LIST_HEAD(&locks_to_send);

/*
- * Allocating count locks is enough because no locks can be added to
- * the list while we are holding cinode->lock_mutex that protects
- * locking operations of this inode.
+ * Allocating count locks is enough because no FL_POSIX locks can be
+ * added to the list while we are holding cinode->lock_mutex that
+ * protects locking operations of this inode.
*/
for (; i < count; i++) {
lck = kmalloc(sizeof(struct lock_to_push), GFP_KERNEL);
@@ -973,18 +973,20 @@ cifs_push_posix_locks(struct cifsFileInf
list_add_tail(&lck->llist, &locks_to_send);
}

- i = 0;
el = locks_to_send.next;
lock_flocks();
cifs_for_each_lock(cfile->dentry->d_inode, before) {
+ flock = *before;
+ if ((flock->fl_flags & FL_POSIX) == 0)
+ continue;
if (el == &locks_to_send) {
- /* something is really wrong */
+ /*
+ * The list ended. We don't have enough allocated
+ * structures - something is really wrong.
+ */
cERROR(1, "Can't push all brlocks!");
break;
}
- flock = *before;
- if ((flock->fl_flags & FL_POSIX) == 0)
- continue;
length = 1 + flock->fl_end - flock->fl_start;
if (flock->fl_type == F_RDLCK || flock->fl_type == F_SHLCK)
type = CIFS_RDLCK;
@@ -996,7 +998,6 @@ cifs_push_posix_locks(struct cifsFileInf
lck->length = length;
lck->type = type;
lck->offset = flock->fl_start;
- i++;
el = el->next;
}
unlock_flocks();



\
 
 \ /
  Last update: 2012-03-30 23:37    [W:0.325 / U:0.320 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site