tier/glusterd : making new tier detach command throw warning

        back port of : http://review.gluster.org/#/c/12883/

For detach tier, the validation was done using the string "detach-tier"
but the new commands used has the string "tier". Making the string use
"tier" to compare, creates problem as the tier status and tier detach
have the keyword "tier". So tier detach and tier status were separated.
and strtok was used to prevent the condition from passing when the
volume name has a substring of "tier". (only the second word from the
string is got and checked if the feature is tier).

Problem: new detach tier command doesnt throw warnings like
"not a tier volume" or " detach tier not started" respectively
instead it prints empty output.

Fix: while validate the volume is checked if its a tiered volume
if yes it is checked if the detach tier is started, else a warning
is thrown respectively.

>Change-Id: I94246d53b18ab0e9406beaf459eaddb7c5b766c2
>BUG: 1288517
>Signed-off-by: hari gowtham <hgowtham@redhat.com>
>Reviewed-on: http://review.gluster.org/12883
>Tested-by: NetBSD Build System <jenkins@build.gluster.org>
>Tested-by: Gluster Build System <jenkins@build.gluster.com>
>Reviewed-by: Atin Mukherjee <amukherj@redhat.com>

Change-Id: I1ac3b6baaec644dbc2025085a7f17abd56ba169d
BUG: 1291970
Signed-off-by: hari gowtham <hgowtham@redhat.com>
Reviewed-on: http://review.gluster.org/12976
Tested-by: NetBSD Build System <jenkins@build.gluster.org>
Reviewed-by: Dan Lambright <dlambrig@redhat.com>
Tested-by: Dan Lambright <dlambrig@redhat.com>

2 files changed, 26 insertions, 20 deletions

diff --git a/xlators/mgmt/glusterd/src/glusterd-rebalance.c b/xlators/mgmt/glusterd/src/glusterd-rebalance.c
index 1dea5470738..ea443aaa05e 100644
--- a/xlators/mgmt/glusterd/src/glusterd-rebalance.c
+++ b/xlators/mgmt/glusterd/src/glusterd-rebalance.c
@@ -528,7 +528,8 @@ __glusterd_handle_defrag_volume (rpcsvc_request_t *req)
         if ((cmd == GF_DEFRAG_CMD_STATUS) ||
             (cmd == GF_DEFRAG_CMD_STATUS_TIER) ||
             (cmd == GF_DEFRAG_CMD_STOP_DETACH_TIER) ||
-              (cmd == GF_DEFRAG_CMD_STOP)) {
+            (cmd == GF_DEFRAG_CMD_STOP) ||
+            (cmd == GF_DEFRAG_CMD_DETACH_STATUS)) {
                 ret = glusterd_op_begin (req, GD_OP_DEFRAG_BRICK_VOLUME,
                                          dict, msg, sizeof (msg));
         } else
@@ -705,7 +706,7 @@ glusterd_op_stage_rebalance (dict_t *dict, char **op_errstr)
         case GF_DEFRAG_CMD_STATUS_TIER:
         case GF_DEFRAG_CMD_STATUS:
         case GF_DEFRAG_CMD_STOP:
-        case GF_DEFRAG_CMD_STOP_DETACH_TIER:
+
                 ret = dict_get_str (dict, "cmd-str", &cmd_str);
                 if (ret) {
                         gf_msg (this->name, GF_LOG_ERROR, 0,
@@ -720,6 +721,7 @@ glusterd_op_stage_rebalance (dict_t *dict, char **op_errstr)
                         ret = -1;
                         goto out;
                 }
+
                 if (strstr(cmd_str, "remove-brick") != NULL) {
                         if (volinfo->rebal.op != GD_OP_REMOVE_BRICK) {
                                 snprintf (msg, sizeof(msg), "remove-brick not "
@@ -740,7 +742,7 @@ glusterd_op_stage_rebalance (dict_t *dict, char **op_errstr)
                                 goto out;
                         }
                 }
-                if  (strstr(cmd_str, "tier") != NULL) {
+                if (cmd == GF_DEFRAG_CMD_STATUS_TIER) {
                         if (volinfo->type != GF_CLUSTER_TYPE_TIER) {
                                 snprintf (msg, sizeof(msg), "volume %s is not "
                                           "a tier volume.", volinfo->volname);
@@ -748,21 +750,24 @@ glusterd_op_stage_rebalance (dict_t *dict, char **op_errstr)
                                 goto out;
                         }
                 }
-                if (strstr(cmd_str, "detach-tier") != NULL) {
-                        if (volinfo->type != GF_CLUSTER_TYPE_TIER) {
-                                snprintf (msg, sizeof(msg), "volume %s is not "
-                                          "a tier volume.", volinfo->volname);
-                                ret = -1;
-                                goto out;
-                        }
-                        if (volinfo->rebal.op != GD_OP_REMOVE_BRICK) {
-                                snprintf (msg, sizeof(msg), "Detach-tier "
-                                          "not started");
-                                ret = -1;
-                                goto out;
-                        }
+
+                break;
+
+        case GF_DEFRAG_CMD_STOP_DETACH_TIER:
+        case GF_DEFRAG_CMD_DETACH_STATUS:
+                if (volinfo->type != GF_CLUSTER_TYPE_TIER) {
+                        snprintf (msg, sizeof(msg), "volume %s is not "
+                                  "a tier volume.", volinfo->volname);
+                        ret = -1;
+                        goto out;
                 }
 
+                if (volinfo->rebal.op != GD_OP_REMOVE_BRICK) {
+                        snprintf (msg, sizeof(msg), "Detach-tier "
+                                  "not started");
+                        ret = -1;
+                        goto out;
+                }
                 break;
         default:
                 break;
@@ -929,11 +934,11 @@ glusterd_op_rebalance (dict_t *dict, char **op_errstr, dict_t *rsp_dict)
                 }
 
                 if (volinfo->type == GF_CLUSTER_TYPE_TIER &&
-                    cmd == GF_OP_CMD_STOP_DETACH_TIER) {
+                                cmd == GF_OP_CMD_STOP_DETACH_TIER) {
                         glusterd_defrag_info_set (volinfo, dict,
-                                  GF_DEFRAG_CMD_START_TIER,
-                                  GF_DEFRAG_CMD_START,
-                                  GD_OP_REBALANCE);
+                                        GF_DEFRAG_CMD_START_TIER,
+                                        GF_DEFRAG_CMD_START,
+                                        GD_OP_REBALANCE);
                         glusterd_restart_rebalance_for_volume (volinfo);
                 }
 
diff --git a/xlators/mgmt/glusterd/src/glusterd-utils.c b/xlators/mgmt/glusterd/src/glusterd-utils.c
index df5ac17242b..c373229788b 100644
--- a/xlators/mgmt/glusterd/src/glusterd-utils.c
+++ b/xlators/mgmt/glusterd/src/glusterd-utils.c
@@ -10814,6 +10814,7 @@ glusterd_disallow_op_for_tier (glusterd_volinfo_t *volinfo, glusterd_op_t op,
                 case GF_DEFRAG_CMD_START_DETACH_TIER:
                 case GF_DEFRAG_CMD_STOP_DETACH_TIER:
                 case GF_DEFRAG_CMD_STATUS:
+                case GF_DEFRAG_CMD_DETACH_STATUS:
                         ret = 0;
                         break;
                 default: