cluster/dht: Skip file migration if the subvol that meets min-free-disk

... criteria happens to be the same subvol containing data-file

Rebalance need to figure out a new subvol in case the hashed subvol
does not have enough space. In the process of figuring out the new subvol,
we need to ignore the source subvol, otherwise it will lead to data loss.

Test: Manual
Ran the following
sizeof /tmp/1: 1.5GB
sizeof /brick/1: 16GB
sizeof /tmp/2: 1.5GB
<start>

glusterd;  gluster v create test1 vm1:/brick/1 vm1:/tmp/1;
gluster v start test1;
mount -t glusterfs vm1:test1 /mnt;
for i in {1..2000}
do
dd if=/dev/zero of=/mnt/file$i bs=1KB count=1 &> /dev/null;
done
gluster v add-brick test1 vm1:/tmp/2
gluster v set test1 min-free-disk 12GB
gluster v remove-brick test1 vm1:/tmp/1 star
<end>

file count and data were intact.

> Change-Id: Ib8fc8467a3d48a7c12958824c4f0b88e160b86c1
> BUG: 1441508
> Signed-off-by: Susant Palai <spalai@redhat.com>
> Reviewed-on: https://review.gluster.org/17064
> Smoke: Gluster Build System <jenkins@build.gluster.org>
> NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org>
> CentOS-regression: Gluster Build System <jenkins@build.gluster.org>
> Reviewed-by: Raghavendra G <rgowdapp@redhat.com>
> Signed-off-by: Susant Palai <spalai@redhat.com>

Change-Id: Ib8fc8467a3d48a7c12958824c4f0b88e160b86c1
BUG: 1473133
Signed-off-by: Susant Palai <spalai@redhat.com>
Reviewed-on: https://review.gluster.org/17832
Smoke: Gluster Build System <jenkins@build.gluster.org>
Tested-by: Shyamsundar Ranganathan <srangana@redhat.com>
CentOS-regression: Gluster Build System <jenkins@build.gluster.org>
Reviewed-by: Shyamsundar Ranganathan <srangana@redhat.com>

0 files changed, 0 insertions, 0 deletions