cluster/afr: Check for required number of entrylks

Backport of http://review.gluster.org/#/c/14358/

Problem:
Parallel rmdir operations on the same directory results in ENOTCONN
messages eventhough there was no network disconnect.

In blocking entry lock during rmdir, AFR takes 2 set of locks on all its
children-One (parentdir,name of dir to be deleted), the other (full lock
on the dir being deleted). We proceed to pre-op stage even if only a
single lock (but not all the needed locks) was obtained, only to fail it with
ENOTCONN because afr_locked_nodes_get() returns zero nodes  in
afr_changelog_pre_op().

Fix:
After we get replies for all blocking lock requests, if we don't have
the minimum number of locks to carry out the FOP, unlock and fail the
FOP. The op_errno will be that of the last failed reply we got, i.e.
whatever is set in afr_lock_cbk().

Change-Id: Ibef25e65b468ebb5ea6ae1f5121a5f1201072293
BUG: 1338051
Signed-off-by: Ravishankar N <ravishankar@redhat.com>
Reviewed-on: http://review.gluster.org/14461
Smoke: Gluster Build System <jenkins@build.gluster.com>
NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org>
Reviewed-by: Pranith Kumar Karampuri <pkarampu@redhat.com>
CentOS-regression: Gluster Build System <jenkins@build.gluster.com>

0 files changed, 0 insertions, 0 deletions