ocfs2: Do not initialize lvb in ocfs2_orphan_scan_lock_res_init()

We don't access the LVB in our ocfs2_*_lock_res_init() functions.

Since the LVB can become invalid during some cluster recovery
operations, the dlmglue must be able to handle an uninitialized
LVB.

For the orphan scan lock, we initialized an uninitialzed LVB with our
scan sequence number plus one.  This starts a normal orphan scan
cycle.

Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>

2 files changed, 4 insertions, 4 deletions

diff --git a/fs/ocfs2/dlmglue.c b/fs/ocfs2/dlmglue.c
index 83d2ddb27186..d3d1f9372f7e 100644
--- a/fs/ocfs2/dlmglue.c
+++ b/fs/ocfs2/dlmglue.c
@@ -644,14 +644,10 @@ static void ocfs2_nfs_sync_lock_res_init(struct ocfs2_lock_res *res,
 static void ocfs2_orphan_scan_lock_res_init(struct ocfs2_lock_res *res,
                                             struct ocfs2_super *osb)
 {
-        struct ocfs2_orphan_scan_lvb *lvb;
-
         ocfs2_lock_res_init_once(res);
         ocfs2_build_lock_name(OCFS2_LOCK_TYPE_ORPHAN_SCAN, 0, 0, res->l_name);
         ocfs2_lock_res_init_common(osb, res, OCFS2_LOCK_TYPE_ORPHAN_SCAN,
                                    &ocfs2_orphan_scan_lops, osb);
-        lvb = ocfs2_dlm_lvb(&res->l_lksb);
-        lvb->lvb_version = OCFS2_ORPHAN_LVB_VERSION;
 }
 
 void ocfs2_file_lock_res_init(struct ocfs2_lock_res *lockres,
@@ -2386,6 +2382,9 @@ int ocfs2_orphan_scan_lock(struct ocfs2_super *osb, u32 *seqno, int ex)
         if (ocfs2_dlm_lvb_valid(&lockres->l_lksb) &&
             lvb->lvb_version == OCFS2_ORPHAN_LVB_VERSION)
                 *seqno = be32_to_cpu(lvb->lvb_os_seqno);
+        else
+                *seqno = osb->osb_orphan_scan.os_seqno + 1;
+
         return status;
 }
 
diff --git a/fs/ocfs2/journal.c b/fs/ocfs2/journal.c
index 70215a21fb20..0b2c27a9485e 100644
--- a/fs/ocfs2/journal.c
+++ b/fs/ocfs2/journal.c
@@ -1952,6 +1952,7 @@ int ocfs2_orphan_scan_init(struct ocfs2_super *osb)
         atomic_set(&os->os_state, ORPHAN_SCAN_ACTIVE);
         os->os_osb = osb;
         os->os_count = 0;
+        os->os_seqno = 0;
         os->os_scantime = CURRENT_TIME;
         mutex_init(&os->os_lock);