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Diffstat (limited to 'fs/locks.c')
-rw-r--r--fs/locks.c27
1 files changed, 22 insertions, 5 deletions
diff --git a/fs/locks.c b/fs/locks.c
index 265b5190db3e..a45efc16945d 100644
--- a/fs/locks.c
+++ b/fs/locks.c
@@ -868,6 +868,21 @@ static bool posix_locks_conflict(struct file_lock *caller_fl,
return locks_conflict(caller_fl, sys_fl);
}
+/* Determine if lock sys_fl blocks lock caller_fl. Used on xx_GETLK
+ * path so checks for additional GETLK-specific things like F_UNLCK.
+ */
+static bool posix_test_locks_conflict(struct file_lock *caller_fl,
+ struct file_lock *sys_fl)
+{
+ /* F_UNLCK checks any locks on the same fd. */
+ if (caller_fl->fl_type == F_UNLCK) {
+ if (!posix_same_owner(caller_fl, sys_fl))
+ return false;
+ return locks_overlap(caller_fl, sys_fl);
+ }
+ return posix_locks_conflict(caller_fl, sys_fl);
+}
+
/* Determine if lock sys_fl blocks lock caller_fl. FLOCK specific
* checking before calling the locks_conflict().
*/
@@ -901,7 +916,7 @@ posix_test_lock(struct file *filp, struct file_lock *fl)
retry:
spin_lock(&ctx->flc_lock);
list_for_each_entry(cfl, &ctx->flc_posix, fl_list) {
- if (!posix_locks_conflict(fl, cfl))
+ if (!posix_test_locks_conflict(fl, cfl))
continue;
if (cfl->fl_lmops && cfl->fl_lmops->lm_lock_expirable
&& (*cfl->fl_lmops->lm_lock_expirable)(cfl)) {
@@ -1301,6 +1316,7 @@ retry:
out:
spin_unlock(&ctx->flc_lock);
percpu_up_read(&file_rwsem);
+ trace_posix_lock_inode(inode, request, error);
/*
* Free any unused locks.
*/
@@ -1309,7 +1325,6 @@ retry:
if (new_fl2)
locks_free_lock(new_fl2);
locks_dispose_list(&dispose);
- trace_posix_lock_inode(inode, request, error);
return error;
}
@@ -2136,7 +2151,7 @@ EXPORT_SYMBOL_GPL(vfs_test_lock);
* @fl: The file_lock who's fl_pid should be translated
* @ns: The namespace into which the pid should be translated
*
- * Used to tranlate a fl_pid into a namespace virtual pid number
+ * Used to translate a fl_pid into a namespace virtual pid number
*/
static pid_t locks_translate_pid(struct file_lock *fl, struct pid_namespace *ns)
{
@@ -2207,7 +2222,8 @@ int fcntl_getlk(struct file *filp, unsigned int cmd, struct flock *flock)
if (fl == NULL)
return -ENOMEM;
error = -EINVAL;
- if (flock->l_type != F_RDLCK && flock->l_type != F_WRLCK)
+ if (cmd != F_OFD_GETLK && flock->l_type != F_RDLCK
+ && flock->l_type != F_WRLCK)
goto out;
error = flock_to_posix_lock(filp, fl, flock);
@@ -2414,7 +2430,8 @@ int fcntl_getlk64(struct file *filp, unsigned int cmd, struct flock64 *flock)
return -ENOMEM;
error = -EINVAL;
- if (flock->l_type != F_RDLCK && flock->l_type != F_WRLCK)
+ if (cmd != F_OFD_GETLK && flock->l_type != F_RDLCK
+ && flock->l_type != F_WRLCK)
goto out;
error = flock64_to_posix_lock(filp, fl, flock);