cluster/dht: Make rebalance honor min-free-disk

test:  Manual

created files of size 1K on 2 brick(of size 1GB) setup .
added a brick of size 16GB.
set min-free-disk to 12GB(so that first two bricks won't receive any files).
removed one of the 1st brick of size 1GB.

Logs from test:
[2017-04-12 08:52:08.196484] W [MSGID: 0] [dht-rebalance.c:895:__dht_check_free_space]
 0-test1-dht: Write will cross min-free-disk for file - /tile32 on subvol - test1-client-1.
Looking for new subvol.

[2017-04-12 08:52:08.196904] I [MSGID: 0] [dht-rebalance.c:925:__dht_check_free_space]
0-test1-dht: new target found - test1-client-2 for file - /tile32

 - Post migration we have two files. The new destination (/brick/1) has the data file
[root@vm1 ~]# ll /brick/1/tile32
-rw-r--r--. 2 root root 0 Apr 12 14:22 /brick/1/tile32

 - On the old target the linkto file is there with linkto xattr pointing to /brick/1
[root@vm1 ~]# ll /tmp/2/tile32
---------T. 2 root root 1000 Apr 12 14:22 /tmp/2/tile32
[root@vm1 ~]# getfattr -m . -de text /tmp/2/tile32
getfattr: Removing leading '/' from absolute path names
security.selinux="unconfined_u:object_r:user_tmp_t:s0"
trusted.gfid="����:Aс�#�/'b2"
trusted.glusterfs.dht.linkto="test1-client-2"

Marking ./tests/features/worm_sh.t as bad test.
Reason being, this patch failed on master branch as well and it has nothing
to do with rebalance/remove-brick.

BUG: 1441508
Change-Id: I90bae251cda3d957a49cdceda90cd08311a392fb
Signed-off-by: Susant Palai <spalai@redhat.com>
Reviewed-on: https://review.gluster.org/17034
Smoke: Gluster Build System <jenkins@build.gluster.org>
NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org>
Reviewed-by: Amar Tumballi <amarts@redhat.com>
Reviewed-by: Raghavendra G <rgowdapp@redhat.com>
CentOS-regression: Gluster Build System <jenkins@build.gluster.org>

1 files changed, 23 insertions, 2 deletions

diff --git a/tests/bugs/distribute/bug-1161311.t b/tests/bugs/distribute/bug-1161311.t
index 8cf905a8f0b..8db66351ebe 100755
--- a/tests/bugs/distribute/bug-1161311.t
+++ b/tests/bugs/distribute/bug-1161311.t
@@ -15,6 +15,27 @@
 . $(dirname $0)/../../include.rc
 . $(dirname $0)/../../volume.rc
 
+cleanup
+TEST truncate -s 10GB $B0/brick1
+TEST truncate -s 10GB $B0/brick2
+TEST truncate -s 10GB $B0/brick3
+
+TEST LO1=`SETUP_LOOP $B0/brick1`
+TEST MKFS_LOOP $LO1
+
+TEST LO2=`SETUP_LOOP $B0/brick2`
+TEST MKFS_LOOP $LO2
+
+TEST LO3=`SETUP_LOOP $B0/brick3`
+TEST MKFS_LOOP $LO3
+
+TEST mkdir -p $B0/${V0}1 $B0/${V0}2  $B0/${V0}3
+
+
+TEST MOUNT_LOOP $LO1 $B0/${V0}1
+TEST MOUNT_LOOP $LO2 $B0/${V0}2
+TEST MOUNT_LOOP $LO3 $B0/${V0}3
+
 checksticky () {
 	i=0;
 	while [ ! -k $1 ]; do
@@ -31,7 +52,6 @@ checksticky () {
 	return 0
 }
 
-cleanup;
 
 TEST glusterd
 TEST pidof glusterd
@@ -131,5 +151,6 @@ TEST ln ./dir1/FILE7 ./FILE7
 cd /
 linkcountsrc=$(stat -c %h $M0/dir1/FILE1)
 TEST [[ $linkcountsrc == 14 ]]
-
+UMOUNT_LOOP ${B0}/${V0}{1..3}
+rm -f ${B0}/brick{1..3}
 cleanup;