ocfs2: Fix lvb corruption

Properly ignore LVB flags during a PR downconvert. This avoids an illegal
lvb update.

Signed-off-by: Kurt Hackel <kurt.hackel@oracle.com>
Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/fs/ocfs2/dlm/dlmunlock.c b/fs/ocfs2/dlm/dlmunlock.c
index b0c3134f4f70..4ce3f82fb736 100644
--- a/fs/ocfs2/dlm/dlmunlock.c
+++ b/fs/ocfs2/dlm/dlmunlock.c
@@ -483,6 +483,10 @@ int dlm_unlock_lock_handler(struct o2net_msg *msg, u32 len, void *data)
 
         /* lock was found on queue */
         lksb = lock->lksb;
+        if (flags & (LKM_VALBLK|LKM_PUT_LVB) &&
+            lock->ml.type != LKM_EXMODE)
+                flags &= ~(LKM_VALBLK|LKM_PUT_LVB);
+
         /* unlockast only called on originating node */
         if (flags & LKM_PUT_LVB) {
                 lksb->flags |= DLM_LKSB_PUT_LVB;
@@ -632,6 +636,8 @@ retry:
 
         spin_lock(&res->spinlock);
         is_master = (res->owner == dlm->node_num);
+        if (flags & LKM_VALBLK && lock->ml.type != LKM_EXMODE)
+                flags &= ~LKM_VALBLK;
         spin_unlock(&res->spinlock);
 
         if (is_master) {