cluster/ec: Prevent double unwind

        Backport of http://review.gluster.com/11111

Problem:
1) ec_access/ec_readlink_/ec_readdir[p] _cbks are trying to recover only from
ENOTCONN.
2) When the fop succeeds it unwinds right away. But when its
ec_fop_manager resumes, if the number of bricks that are up is less than
ec->fragments, the the state machine will resume with -EC_STATE_REPORT which
unwinds again. This will lead to crashes.

Fix:
- If fop fails retry on other subvols, as ESTALE/ENOENT/EBADFD etc are also
recoverable.
- unwind success/failure in _cbks

BUG: 1229331
Change-Id: I7510984a237761efba65e872313a8ede8b7543e5
Signed-off-by: Pranith Kumar K <pkarampu@redhat.com>
Reviewed-on: http://review.gluster.org/11128
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Tested-by: NetBSD Build System <jenkins@build.gluster.org>
Reviewed-by: Xavier Hernandez <xhernandez@datalab.es>

0 files changed, 0 insertions, 0 deletions