diff options
Diffstat (limited to 'xlators/features/locks/src/posix.c')
| -rw-r--r-- | xlators/features/locks/src/posix.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/xlators/features/locks/src/posix.c b/xlators/features/locks/src/posix.c index 7dca2d0cb5f..3d79c570bb0 100644 --- a/xlators/features/locks/src/posix.c +++ b/xlators/features/locks/src/posix.c @@ -1811,12 +1811,23 @@ pl_lk (call_frame_t *frame, xlator_t *this, posix_lock_t *conf = NULL; int ret = 0; - if ((flock->l_start < 0) || (flock->l_len < 0)) { + if ((flock->l_start < 0) || + ((flock->l_start + flock->l_len) < 0)) { op_ret = -1; op_errno = EINVAL; goto unwind; } + /* As per 'man 3 fcntl', the value of l_len may be + * negative. In such cases, lock request should be + * considered for the range starting at 'l_start+l_len' + * and ending at 'l_start-1'. Update the fields accordingly. + */ + if (flock->l_len < 0) { + flock->l_start += flock->l_len; + flock->l_len = abs (flock->l_len); + } + pl_inode = pl_inode_get (this, fd->inode); if (!pl_inode) { op_ret = -1; |