[Bugs] [Bug 1300979] [Snapshot]: Snapshot restore stucks in post validation.

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1300979



--- Comment #2 from Vijay Bellur <vbellur at redhat.com> ---
COMMIT: http://review.gluster.org/13282 committed in master by Rajesh Joseph
(rjoseph at redhat.com) 
------
commit 3f78b6b3dc6376945a1b1a7c4af16103901ab746
Author: Avra Sengupta <asengupt at redhat.com>
Date:   Fri Jan 22 16:59:53 2016 +0530

    snapshot: Fix parent volinfo corruption in snapshot restore

    Remove parent_volinfo irrespective of success or failure
    of glusterd_lvm_snapshot_remove(). This prevents the
    duplication of the volinfo after the execution of
    glusterd_snapshot_restore().

    When commit fails on originator node, we don't perform
    commit on the other nodes, as a result we don't have a
    backup of /var/lib/glusterd/vols/<volname> in the
    GLUSTERD_TRASH in other nodes. But in the postvalidate
    we try to restore from GLUSTED_TRASH and end up cleaning
    up /var/lib/glusterd/vols/<volname>. Hence moved
    glusterd_snapshot_backup_vol() from commit to prevalidate,
    so that the backup is always available when a cleanup is
    needed.

    Change-Id: Icd471b23faf02bad680b9a1aadc4a0175f7cce8b
    BUG: 1300979
    Signed-off-by: Avra Sengupta <asengupt at redhat.com>
    Reviewed-on: http://review.gluster.org/13282
    Smoke: Gluster Build System <jenkins at build.gluster.com>
    NetBSD-regression: NetBSD Build System <jenkins at build.gluster.org>
    CentOS-regression: Gluster Build System <jenkins at build.gluster.com>
    Reviewed-by: Rajesh Joseph <rjoseph at redhat.com>

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