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...@oracle.com>
Reviewed-by: Ryan Ding <ryan.d...@oracle.com>
---
fs/ocfs2/cluster/heartbeat.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/fs/ocfs2/cluster/heartbeat.c b/fs/ocfs2/cluster/heartbeat.c
index 6c57fd21e597..cb931381f474 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 {
@@ -397,6 +400,12 @@ static void o2hb_nego_timeout(struct work_struct *work)
unsigned long live_node_bitmap[BITS_TO_LONGS(O2NM_MAX_NODES)];
int master_node, i, ret;
+ /* 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);
@@ -1230,6 +1239,7 @@ 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();
--
1.7.9.5
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