ocfs2: o2hb: don't negotiate if last hb fail

Sometimes io error is returned when storage is down for a while.  Like
for iscsi device, stroage is made offline when session timeout, and this
will make all io return -EIO.  For this case, nodes shouldn't do
negotiate timeout but should fence self.  So let nodes fence self when
o2hb_do_disk_heartbeat return an error, this is the same behavior with
o2hb without negotiate timer.

Signed-off-by: Junxiao Bi <junxiao.bi@oracle.com>
Reviewed-by: Ryan Ding <ryan.ding@oracle.com>
Reviewed-by: Mark Fasheh <mfasheh@suse.de>
Cc: Gang He <ghe@suse.com>
Cc: rwxybh <rwxybh@126.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Joseph Qi <joseph.qi@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 10 insertions, 0 deletions

diff --git a/fs/ocfs2/cluster/heartbeat.c b/fs/ocfs2/cluster/heartbeat.c
index 84ebeb5678c6..31a5c0803e0a 100644
--- a/fs/ocfs2/cluster/heartbeat.c
+++ b/fs/ocfs2/cluster/heartbeat.c
@@ -284,6 +284,9 @@ struct o2hb_region {
         /* Message key for negotiate timeout message. */
         unsigned int            hr_key;
         struct list_head        hr_handler_list;
+
+        /* last hb status, 0 for success, other value for error. */
+        int                     hr_last_hb_status;
 };
 
 struct o2hb_bio_wait_ctxt {
@@ -395,6 +398,12 @@ static void o2hb_nego_timeout(struct work_struct *work)
         struct o2hb_region *reg;
 
         reg = container_of(work, struct o2hb_region, hr_nego_timeout_work.work);
+        /* don't negotiate timeout if last hb failed since it is very
+         * possible io failed. Should let write timeout fence self.
+         */
+        if (reg->hr_last_hb_status)
+                return;
+
         o2hb_fill_node_map(live_node_bitmap, sizeof(live_node_bitmap));
         /* lowest node as master node to make negotiate decision. */
         master_node = find_next_bit(live_node_bitmap, O2NM_MAX_NODES, 0);
@@ -1228,6 +1237,7 @@ static int o2hb_thread(void *data)
                 before_hb = ktime_get_real();
 
                 ret = o2hb_do_disk_heartbeat(reg);
+                reg->hr_last_hb_status = ret;
 
                 after_hb = ktime_get_real();