ceph: forbid mandatory file lock

Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com>

1 files changed, 12 insertions, 0 deletions

diff --git a/fs/ceph/locks.c b/fs/ceph/locks.c
index 133e0063da64..f91a569a20fb 100644
--- a/fs/ceph/locks.c
+++ b/fs/ceph/locks.c
@@ -87,6 +87,12 @@ int ceph_lock(struct file *file, int cmd, struct file_lock *fl)
         u8 wait = 0;
         u16 op = CEPH_MDS_OP_SETFILELOCK;
 
+        if (!(fl->fl_flags & FL_POSIX))
+                return -ENOLCK;
+        /* No mandatory locks */
+        if (__mandatory_lock(file->f_mapping->host) && fl->fl_type != F_UNLCK)
+                return -ENOLCK;
+
         fl->fl_nspid = get_pid(task_tgid(current));
         dout("ceph_lock, fl_pid:%d", fl->fl_pid);
 
@@ -133,6 +139,12 @@ int ceph_flock(struct file *file, int cmd, struct file_lock *fl)
         int err;
         u8 wait = 0;
 
+        if (!(fl->fl_flags & FL_FLOCK))
+                return -ENOLCK;
+        /* No mandatory locks */
+        if (__mandatory_lock(file->f_mapping->host) && fl->fl_type != F_UNLCK)
+                return -ENOLCK;
+
         fl->fl_nspid = get_pid(task_tgid(current));
         dout("ceph_flock, fl_pid:%d", fl->fl_pid);