ocfs2: Depend on configfs heartbeat items.

ocfs2 mounts require a heartbeat region.  Use the new configfs_depend_item()
facility to actually depend on them so they can't go away from under us.

First, teach cluster/nodemanager.c to depend an item on the o2cb subsystem.
Then teach o2hb_register_callbacks to take a UUID and depend on the
appropriate region.  Finally, teach all users of o2hb to pass a UUID or
NULL if they don't require a pin.

Signed-off-by: Joel Becker <joel.becker@oracle.com>
Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>

1 files changed, 4 insertions, 4 deletions

diff --git a/fs/ocfs2/dlm/dlmdomain.c b/fs/ocfs2/dlm/dlmdomain.c
index d836b98dd99a..6954565b8ccb 100644
--- a/fs/ocfs2/dlm/dlmdomain.c
+++ b/fs/ocfs2/dlm/dlmdomain.c
@@ -1128,8 +1128,8 @@ bail:
 
 static void dlm_unregister_domain_handlers(struct dlm_ctxt *dlm)
 {
-        o2hb_unregister_callback(&dlm->dlm_hb_up);
-        o2hb_unregister_callback(&dlm->dlm_hb_down);
+        o2hb_unregister_callback(NULL, &dlm->dlm_hb_up);
+        o2hb_unregister_callback(NULL, &dlm->dlm_hb_down);
         o2net_unregister_handler_list(&dlm->dlm_domain_handlers);
 }
 
@@ -1141,13 +1141,13 @@ static int dlm_register_domain_handlers(struct dlm_ctxt *dlm)
 
         o2hb_setup_callback(&dlm->dlm_hb_down, O2HB_NODE_DOWN_CB,
                             dlm_hb_node_down_cb, dlm, DLM_HB_NODE_DOWN_PRI);
-        status = o2hb_register_callback(&dlm->dlm_hb_down);
+        status = o2hb_register_callback(NULL, &dlm->dlm_hb_down);
         if (status)
                 goto bail;
 
         o2hb_setup_callback(&dlm->dlm_hb_up, O2HB_NODE_UP_CB,
                             dlm_hb_node_up_cb, dlm, DLM_HB_NODE_UP_PRI);
-        status = o2hb_register_callback(&dlm->dlm_hb_up);
+        status = o2hb_register_callback(NULL, &dlm->dlm_hb_up);
         if (status)
                 goto bail;