ocfs2: do LVB puts in place

Don't wait until the AST will be fired to do the LVB copy into the lock
resource.

Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>

diff --git a/fs/ocfs2/dlm/dlmast.c b/fs/ocfs2/dlm/dlmast.c
index 87ee29c..42775e2 100644 (file)
--- a/fs/ocfs2/dlm/dlmast.c
+++ b/fs/ocfs2/dlm/dlmast.c
@@ -197,12 +197,14 @@ static void dlm_update_lvb(struct dlm_ctxt *dlm, struct dlm_lock_resource *res,
                                  lock->ml.node == dlm->node_num ? "master" :
                                  "remote");
                        memcpy(lksb->lvb, res->lvb, DLM_LVB_LEN);
-               } else if (lksb->flags & DLM_LKSB_PUT_LVB) {
-                       mlog(0, "setting lvb from lockres for %s node\n",
-                                 lock->ml.node == dlm->node_num ? "master" :
-                                 "remote");
-                       memcpy(res->lvb, lksb->lvb, DLM_LVB_LEN);
                }
+               /* Do nothing for lvb put requests - they should be done in
+                * place when the lock is downconverted - otherwise we risk
+                * racing gets and puts which could result in old lvb data
+                * being propagated. We leave the put flag set and clear it
+                * here. In the future we might want to clear it at the time
+                * the put is actually done.
+                */
                spin_unlock(&res->spinlock);
        }
 

diff --git a/fs/ocfs2/dlm/dlmconvert.c b/fs/ocfs2/dlm/dlmconvert.c
index 70888b3..90cbaaf 100644 (file)
--- a/fs/ocfs2/dlm/dlmconvert.c
+++ b/fs/ocfs2/dlm/dlmconvert.c
@@ -214,6 +214,9 @@ grant:
        if (lock->ml.node == dlm->node_num)
                mlog(0, "doing in-place convert for nonlocal lock\n");
        lock->ml.type = type;
+       if (lock->lksb->flags & DLM_LKSB_PUT_LVB)
+               memcpy(res->lvb, lock->lksb->lvb, DLM_LVB_LEN);
+
        status = DLM_NORMAL;
        *call_ast = 1;
        goto unlock_exit;