TIER: stopping the tierd when the volume goes down

If there are large number of files to be migrated
and by this time if the volume goes down, then the tierd
has to be stopped. But on a huge query file list it keeps
checking for each file before stopping. If the volume comes
up before the old tierd dies then due to the
presence of old tierd new one won't be created. After
the old one completes the task, it dies and the status
ends up as failed.

This patch will check if the status is still running and then let
it continue its work. Else it will stop running the tierd.

Change-Id: I6522a4e2919e84bf502b99b13873795b9274f3cd
BUG: 1315659
Signed-off-by: hari gowtham <hgowtham@redhat.com>
Reviewed-on: http://review.gluster.org/13646
Tested-by: Dan Lambright <dlambrig@redhat.com>
Smoke: Gluster Build System <jenkins@build.gluster.com>
NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org>
CentOS-regression: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Dan Lambright <dlambrig@redhat.com>

1 files changed, 9 insertions, 0 deletions

diff --git a/xlators/cluster/dht/src/tier.c b/xlators/cluster/dht/src/tier.c
index f35787ec010..007cfc60c5a 100644
--- a/xlators/cluster/dht/src/tier.c
+++ b/xlators/cluster/dht/src/tier.c
@@ -512,6 +512,15 @@ tier_migrate_using_query_file (void *_args)
                         goto out;
                 }
 
+                if (defrag->defrag_status != GF_DEFRAG_STATUS_STARTED) {
+                        ret = -1;
+                        gf_msg (this->name, GF_LOG_ERROR, 0,
+                                DHT_MSG_LOG_TIER_ERROR,
+                                "Exiting tier migration as"
+                                "defrag status is not started");
+                        goto out;
+                }
+
                 ret = gettimeofday (&current_time, NULL);
                 if (ret < 0) {
                         gf_msg (this->name, GF_LOG_ERROR, 0,