Tier: Stop tierd for detach start

Problem: tierd was stopped only after detach commit
This makes the detach take a longer time. The detach
demotes the files to the cold brick and if the promotion
frequency is hit, then the tierd starts to promote files to
hot tier again.

Fix: stop tierd after detach start so the files get
demoted faster.

Note: the is_tier_enabled was not maintained properly.
That has been fixed too. some code clean up has been done.

Signed-off-by: hari gowtham <hgowtham@redhat.com>

Change-Id: I532f7410cea04fbb960105483810ea3560ca149b
BUG: 1446381

1 files changed, 10 insertions, 3 deletions

diff --git a/xlators/cluster/dht/src/dht-common.h b/xlators/cluster/dht/src/dht-common.h
index 10c2e2089b8..d396c1d8173 100644
--- a/xlators/cluster/dht/src/dht-common.h
+++ b/xlators/cluster/dht/src/dht-common.h
@@ -405,10 +405,17 @@ enum gf_defrag_type {
         GF_DEFRAG_CMD_PAUSE_TIER = 1 + 9,
         GF_DEFRAG_CMD_RESUME_TIER = 1 + 10,
         GF_DEFRAG_CMD_DETACH_STATUS = 1 + 11,
-        GF_DEFRAG_CMD_DETACH_START = 1 + 12,
-        GF_DEFRAG_CMD_DETACH_STOP = 1 + 13,
+        GF_DEFRAG_CMD_STOP_TIER = 1 + 12,
+        GF_DEFRAG_CMD_DETACH_START = 1 + 13,
+        GF_DEFRAG_CMD_DETACH_COMMIT = 1 + 14,
+        GF_DEFRAG_CMD_DETACH_COMMIT_FORCE = 1 + 15,
+        GF_DEFRAG_CMD_DETACH_STOP = 1 + 16,
         /* new labels are used so it will help
-         * while removing old labels by easily differentiating
+         * while removing old labels by easily differentiating.
+         * A few labels are added so that the count remains same
+         * between this enum and the ones on the xdr file.
+         * different values for the same enum cause errors and
+         * confusion.
          */
 };
 typedef enum gf_defrag_type gf_defrag_type;