cluster/distribute: Ignore non-participating subvols for layout checks

When subvols-per-directory is < available subvols, then there are layouts
which are not populated. This leads to incorrect identification of holes or
overlaps. We need to ignore layouts, which have err == 0, and start == stop.
In the current scenario (start == stop == 0).

Additionally, in layout-merge, treat missing xattrs as err = 0. In case of
missing layouts, anomalies will reset them.

For any other valid subvoles, err != 0 in case of layouts being zeroed out.

Also reverted back dht_selfheal_dir_xattr, which does layout calculation only
on subvols which have errors.

Change-Id: I9f57062722c9e8a26285e10675c31a78921115a1
BUG: 921408
Signed-off-by: shishir gowda <sgowda@redhat.com>
Reviewed-on: http://review.gluster.org/4668
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Amar Tumballi <amarts@redhat.com>
Reviewed-by: Jeff Darcy <jdarcy@redhat.com>
mgmt/glusterd: enable valgrind usage even in non DEBUG build

* Till now running glusterfs processes were allowed to run in valgrind
  mode only when built with debug mode enabled.

Change-Id: I11e07ea2a4da4f82f70cdded6258a22d65d6db64
BUG: 922877
Signed-off-by: Raghavendra Bhat <raghavendra@redhat.com>
Reviewed-on: http://review.gluster.org/4688
Reviewed-by: Anand Avati <avati@redhat.com>
Tested-by: Anand Avati <avati@redhat.com>
tests: fix dependency on sleep in bug-874498.t

With the introduction of http://review.gluster.org/4784, there are
delays which breaks bug-874498.t which wrongly depends on healing
to finish within 2 seconds.

Fix this by using 'EXPECT_WITHIN 60' instead of sleep 2.

Change-Id: I2716d156c977614c719665a5e1f159dabf2878b5
BUG: 874498
Signed-off-by: Anand Avati <avati@redhat.com>
Reviewed-on: http://review.gluster.org/4796
Reviewed-by: Jeff Darcy <jdarcy@redhat.com>
Tested-by: Gluster Build System <jenkins@build.gluster.com>
glusterd: changes in 'volume create' behaviour

This patch incorporates all the changes suggested on the behaviour of
'volume create' command in http://review.gluster.org/#change,4214
(comment #14, to be precise).

Change-Id: Iaac524a59738b177415595b18aa8a136090d3d25
BUG: 948729
Signed-off-by: Krutika Dhananjay <kdhananj@redhat.com>
Reviewed-on: http://review.gluster.org/4740
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Anand Avati <avati@redhat.com>