ocfs2 patch to track delayed orphan scan timer statistics

Patch to track delayed orphan scan timer statistics.

Modifies ocfs2_osb_dump to print the following:
  Orphan Scan=> Local: 10  Global: 21  Last Scan: 67 seconds ago

Signed-off-by: Srinivas Eeda <srinivas.eeda@oracle.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>

fs/ocfs2/journal.c

diff --git a/fs/ocfs2/journal.c b/fs/ocfs2/journal.c
index 44ed768..4a3b9e6 100644
--- a/fs/ocfs2/journal.c
+++ b/fs/ocfs2/journal.c
@@ -1900,6 +1900,8 @@
 	 * number and update LVB so other node will skip the scan for a while
 	 */
 	seqno++;
+	os->os_count++;
+	os->os_scantime = CURRENT_TIME;
 unlock:
 	ocfs2_orphan_scan_unlock(osb, seqno, DLM_LOCK_EX);
 out:
@@ -1939,6 +1941,8 @@
 
 	os = &osb->osb_orphan_scan;
 	os->os_osb = osb;
+	os->os_count = 0;
+	os->os_scantime = CURRENT_TIME;
 	mutex_init(&os->os_lock);
 
 	INIT_DELAYED_WORK(&os->os_orphan_scan_work,