[Bugs] [Bug 1236212] Migration does not work when EC is used as a tiered volume.

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1236212



--- Comment #11 from Anand Avati <aavati at redhat.com> ---
COMMIT: http://review.gluster.org/11433 committed in master by Dan Lambright
(dlambrig at redhat.com) 
------
commit 67a53554ed75081612b56a5658fd569dc5aaa785
Author: Dan Lambright <dlambrig at redhat.com>
Date:   Fri Jun 26 16:33:49 2015 -0400

    cluster/tier: fixes for migration over ec as cold tier

    An opendir is done in rebalance. The graph constructed when
    EC is used in tiering may have no local volumes (if
    all the hot volumes are on one node and all the others on
    another node). Previously the opendir only sent fops down
    the local subvolumes for migration. They must be sent down
    both the hot and cold subvolumes for tiering.

    When setxattr2() received a NULL subvolume; this dereferenced
    an uninitialized variable.

    When a lookup is done during creation of the destination
    file, the xattr dict is "polluted" with virtual xattrs.
    These cause subsequent xattrs in the new file to not be
    written by posix. They are required by EC.

    The inode gfid for "entry_loc" in gf_defrag_migrate_single_file()
    was not initialized. This made underlying translators
    think the gfid was 0, and failed migration.

    Change-Id: I6ccda8ca8e43485b9b354341bbfcb302496f632c
    BUG: 1236212
    Signed-off-by: Dan Lambright <dlambrig at redhat.com>
    Reviewed-on: http://review.gluster.org/11433
    Tested-by: NetBSD Build System <jenkins at build.gluster.org>
    Reviewed-by: Raghavendra G <rgowdapp at redhat.com>
    Reviewed-by: Shyamsundar Ranganathan <srangana at redhat.com>

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