cluster/dht: In reconfig handle removed decommissioned nodes

If no decommissioned nodes options are set in the options, then
clear the conf->decommissioned_bricks.

Change-Id: I426d2bcc874aab21b2eba0b16a580b9a26672ea2
Signed-off-by: shishir gowda <sgowda@redhat.com>
BUG: 973073
Reviewed-on: http://review.gluster.org/5199
Reviewed-by: Amar Tumballi <amarts@redhat.com>
Reviewed-by: Vijay Bellur <vbellur@redhat.com>
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Anand Avati <avati@redhat.com>

2 files changed, 74 insertions, 0 deletions

diff --git a/tests/bugs/bug-973073.t b/tests/bugs/bug-973073.t
new file mode 100755
index 00000000000..83e2839c67d
--- /dev/null
+++ b/tests/bugs/bug-973073.t
@@ -0,0 +1,48 @@
+#!/bin/bash
+
+. $(dirname $0)/../include.rc
+. $(dirname $0)/../dht.rc
+
+## Steps followed are one descibed in bugzilla
+
+cleanup;
+
+function get_layout()
+{
+        layout1=`getfattr -n trusted.glusterfs.dht -e hex $1 2>&1`
+
+        if [ $? -ne 0 ]
+        then
+                echo 1
+        else
+                echo 0
+        fi
+
+}
+
+BRICK_COUNT=3
+
+TEST glusterd
+TEST pidof glusterd
+
+TEST $CLI volume create $V0 $H0:$B0/${V0}0 $H0:$B0/${V0}1 $H0:$B0/${V0}2
+TEST $CLI volume start $V0
+
+## Mount FUSE
+TEST glusterfs -s $H0 --volfile-id $V0 $M0;
+
+TEST $CLI volume remove-brick $V0 $H0:$B0/${V0}2 start
+
+## remove-brick status == rebalance_status
+EXPECT_WITHIN 30 "0" rebalance_completed
+
+TEST $CLI volume remove-brick $V0 $H0:$B0/${V0}2 stop
+
+TEST $CLI volume rebalance $V0 fix-layout start
+
+EXPECT_WITHIN 30 "0" rebalance_completed
+
+TEST mkdir $M0/dir 2>/dev/null;
+
+EXPECT "0" get_layout $B0/${V0}2/dir
+cleanup;
diff --git a/xlators/cluster/dht/src/dht-shared.c b/xlators/cluster/dht/src/dht-shared.c
index 6b91c56a1df..70aac7710fe 100644
--- a/xlators/cluster/dht/src/dht-shared.c
+++ b/xlators/cluster/dht/src/dht-shared.c
@@ -262,6 +262,28 @@ out:
         return ret;
 }
 
+
+int
+dht_decommissioned_remove (xlator_t *this, dht_conf_t *conf)
+{
+        int         i  = 0;
+        int         ret  = -1;
+
+        if (!conf)
+                goto out;
+
+        for (i = 0; i < conf->subvolume_cnt; i++) {
+                if (conf->decommissioned_bricks[i]) {
+                        conf->decommissioned_bricks[i] = NULL;
+                        conf->decommission_subvols_cnt--;
+                }
+        }
+
+        ret = 0;
+out:
+
+        return ret;
+}
 void
 dht_init_regex (xlator_t *this, dict_t *odict, char *name,
                 regex_t *re, gf_boolean_t *re_valid)
@@ -358,6 +380,10 @@ dht_reconfigure (xlator_t *this, dict_t *options)
                 ret = dht_parse_decommissioned_bricks (this, conf, temp_str);
                 if (ret == -1)
                         goto out;
+        } else {
+                ret = dht_decommissioned_remove (this, conf);
+                if (ret == -1)
+                        goto out;
         }
 
         dht_init_regex (this, options, "rsync-hash-regex",