ocfs2: Abstract out a debugging function for underlying dlms.

dlmglue.c was still referencing a raw o2dlm lksb in one instance.  Let's
create a generic ocfs2_dlm_dump_lksb() function.  This allows underlying
DLMs to print whatever they want about their lock.

We then move the o2dlm dump into stackglue.c where it belongs.
Signed-off-by: Joel Becker <joel.becker@oracle.com>
Signed-off-by: Mark Fasheh <mfasheh@suse.com>

fs/ocfs2/dlmglue.c

@@ -2803,8 +2803,7 @@ static int ocfs2_drop_lock(struct ocfs2_super *osb,
 	if (ret) {
 		ocfs2_log_dlm_error("ocfs2_dlm_unlock", ret, lockres);
 		mlog(ML_ERROR, "lockres flags: %lu\n", lockres->l_flags);
-		/* XXX Need to abstract this */
-		dlm_print_one_lock(lockres->l_lksb.lksb_o2dlm.lockid);
+		ocfs2_dlm_dump_lksb(&lockres->l_lksb);
 		BUG();
 	}
 	mlog(0, "lock %s, successfull return from ocfs2_dlm_unlock\n",

fs/ocfs2/stackglue.c

@@ -252,6 +252,11 @@ void *ocfs2_dlm_lvb(union ocfs2_dlm_lksb *lksb)
 	return (void *)(lksb->lksb_o2dlm.lvb);
 }
 
+void ocfs2_dlm_dump_lksb(union ocfs2_dlm_lksb *lksb)
+{
+	dlm_print_one_lock(lksb->lksb_o2dlm.lockid);
+}
+
 /*
  * Called from the dlm when it's about to evict a node. This is how the
  * classic stack signals node death.

fs/ocfs2/stackglue.h

@@ -91,6 +91,7 @@ int ocfs2_dlm_unlock(struct ocfs2_cluster_connection *conn,
 
 int ocfs2_dlm_lock_status(union ocfs2_dlm_lksb *lksb);
 void *ocfs2_dlm_lvb(union ocfs2_dlm_lksb *lksb);
+void ocfs2_dlm_dump_lksb(union ocfs2_dlm_lksb *lksb);
 
 void o2cb_get_stack(struct ocfs2_locking_protocol *proto);
 void o2cb_put_stack(void);