From: Kurt Hackel <kurt.hackel@oracle.com>
Date: Fri, 28 Apr 2006 02:24:21 +0000 (-0700)
Subject: ocfs2: dump lockres info before we BUG() on a bad reference
X-Git-Tag: v2.6.18-rc1~594^2~32
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=a7f90d83ea8dc8b0999ab7c1c0539af9a6ed69d2;p=platform%2Fkernel%2Flinux-exynos.git

ocfs2: dump lockres info before we BUG() on a bad reference

Signed-off-by: Kurt Hackel <kurt.hackel@oracle.com>
Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
---

diff --git a/fs/ocfs2/dlm/dlmmaster.c b/fs/ocfs2/dlm/dlmmaster.c
index 9c5ef40..427c0af 100644
--- a/fs/ocfs2/dlm/dlmmaster.c
+++ b/fs/ocfs2/dlm/dlmmaster.c
@@ -619,6 +619,28 @@ static void dlm_lockres_release(struct kref *kref)
 	mlog(0, "destroying lockres %.*s\n", res->lockname.len,
 	     res->lockname.name);
 
+	if (!hlist_unhashed(&res->hash_node) ||
+	    !list_empty(&res->granted) ||
+	    !list_empty(&res->converting) ||
+	    !list_empty(&res->blocked) ||
+	    !list_empty(&res->dirty) ||
+	    !list_empty(&res->recovering) ||
+	    !list_empty(&res->purge)) {
+		mlog(ML_ERROR,
+		     "Going to BUG for resource %.*s."
+		     "  We're on a list! [%c%c%c%c%c%c%c]\n",
+		     res->lockname.len, res->lockname.name,
+		     !hlist_unhashed(&res->hash_node) ? 'H' : ' ',
+		     !list_empty(&res->granted) ? 'G' : ' ',
+		     !list_empty(&res->converting) ? 'C' : ' ',
+		     !list_empty(&res->blocked) ? 'B' : ' ',
+		     !list_empty(&res->dirty) ? 'D' : ' ',
+		     !list_empty(&res->recovering) ? 'R' : ' ',
+		     !list_empty(&res->purge) ? 'P' : ' ');
+
+		dlm_print_one_lock_resource(res);
+	}
+
 	/* By the time we're ready to blow this guy away, we shouldn't
 	 * be on any lists. */
 	BUG_ON(!hlist_unhashed(&res->hash_node));