diff options
| author | Krishnan Parthasarathi <kparthas@redhat.com> | 2013-01-31 10:29:20 +0530 |
|---|---|---|
| committer | Anand Avati <avati@redhat.com> | 2013-02-03 12:16:07 -0800 |
| commit | 6b262d20940b088a1d72ad5518cc4908a7316b5a (patch) | |
| tree | ad82bf324c48f6e10c5bb8aa517327d70d75a4d2 /xlators/features/locks/src | |
| parent | 67d0e72b16104911fef1cebb0b7a1b24d683e899 (diff) | |
locks: Protected racy (read) access of ext_list
Change-Id: Ibf639695ebd99c11c6960c9be82c0cee71b50744
BUG: 905864
Signed-off-by: Krishnan Parthasarathi <kparthas@redhat.com>
Reviewed-on: http://review.gluster.org/4458
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Amar Tumballi <amarts@redhat.com>
Reviewed-by: Anand Avati <avati@redhat.com>
Diffstat (limited to 'xlators/features/locks/src')
| -rw-r--r-- | xlators/features/locks/src/common.c | 28 |
1 files changed, 18 insertions, 10 deletions
diff --git a/xlators/features/locks/src/common.c b/xlators/features/locks/src/common.c index cfba16ff735..9c21bddb9e0 100644 --- a/xlators/features/locks/src/common.c +++ b/xlators/features/locks/src/common.c @@ -718,22 +718,30 @@ static posix_lock_t * first_conflicting_overlap (pl_inode_t *pl_inode, posix_lock_t *lock) { posix_lock_t *l = NULL; + posix_lock_t *conf = NULL; - list_for_each_entry (l, &pl_inode->ext_list, list) { - if (l->blocked) - continue; - - if (locks_overlap (l, lock)) { - if (same_owner (l, lock)) + pthread_mutex_lock (&pl_inode->mutex); + { + list_for_each_entry (l, &pl_inode->ext_list, list) { + if (l->blocked) continue; - if ((l->fl_type == F_WRLCK) || - (lock->fl_type == F_WRLCK)) - return l; + if (locks_overlap (l, lock)) { + if (same_owner (l, lock)) + continue; + + if ((l->fl_type == F_WRLCK) || + (lock->fl_type == F_WRLCK)) { + conf = l; + goto unlock; + } + } } } +unlock: + pthread_mutex_unlock (&pl_inode->mutex); - return NULL; + return conf; } /* |