Gitweb:     
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=42dc1601a9a31e8da767a4a9c37bad844b3698ab
Commit:     42dc1601a9a31e8da767a4a9c37bad844b3698ab
Parent:     c54e04b00fe027da30ada5af76b6749772dd644a
Author:     David Teigland <[EMAIL PROTECTED]>
AuthorDate: Wed Jan 9 10:30:45 2008 -0600
Committer:  David Teigland <[EMAIL PROTECTED]>
CommitDate: Wed Jan 30 11:04:42 2008 -0600

    dlm: reject normal unlock when lock is waiting for lookup
    
    Non-forced unlocks should be rejected if the lock is waiting on the
    rsb_lookup list for another lock to establish the master node.
    
    Signed-off-by: David Teigland <[EMAIL PROTECTED]>
---
 fs/dlm/lock.c |    9 +++++----
 1 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/fs/dlm/lock.c b/fs/dlm/lock.c
index c2890ef..fa68e9b 100644
--- a/fs/dlm/lock.c
+++ b/fs/dlm/lock.c
@@ -2110,17 +2110,18 @@ static int validate_unlock_args(struct dlm_lkb *lkb, 
struct dlm_args *args)
        /* an lkb may be waiting for an rsb lookup to complete where the
           lookup was initiated by another lock */
 
-       if (args->flags & (DLM_LKF_CANCEL | DLM_LKF_FORCEUNLOCK)) {
-               if (!list_empty(&lkb->lkb_rsb_lookup)) {
+       if (!list_empty(&lkb->lkb_rsb_lookup)) {
+               if (args->flags & (DLM_LKF_CANCEL | DLM_LKF_FORCEUNLOCK)) {
                        log_debug(ls, "unlock on rsb_lookup %x", lkb->lkb_id);
                        list_del_init(&lkb->lkb_rsb_lookup);
                        queue_cast(lkb->lkb_resource, lkb,
                                   args->flags & DLM_LKF_CANCEL ?
                                   -DLM_ECANCEL : -DLM_EUNLOCK);
                        unhold_lkb(lkb); /* undoes create_lkb() */
-                       rv = -EBUSY;
-                       goto out;
                }
+               /* caller changes -EBUSY to 0 for CANCEL and FORCEUNLOCK */
+               rv = -EBUSY;
+               goto out;
        }
 
        /* cancel not allowed with another cancel/unlock in progress */
-
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