From: Kurt Hackel <kurt.hackel@oracle.com>
Date: Mon, 26 Jun 2006 22:17:47 +0000 (-0700)
Subject: ocfs2: Fix lvb corruption
X-Git-Tag: v2.6.18-rc5~82^2~6
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=4b1af774451bbc8440719e3fe441934a337c3b63;p=linux-2.6

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>
---

diff --git a/fs/ocfs2/dlm/dlmunlock.c b/fs/ocfs2/dlm/dlmunlock.c
index b0c3134f4f..4ce3f82fb7 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) {