[Bugs] [Bug 1225809] [DHT-REBALANCE]-DataLoss: The data appended to a file during its migration will be lost once the migration is done

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1225809



--- Comment #11 from Anand Avati <aavati at redhat.com> ---
COMMIT: http://review.gluster.org/10967 committed in release-3.7 by Shyamsundar
Ranganathan (srangana at redhat.com) 
------
commit 7aa52673cc70011750ff019cefad8e0229f892ad
Author: Nithya Balachandran <nbalacha at redhat.com>
Date:   Tue May 19 23:27:35 2015 +0530

    cluster/dht: fix incorrect dst subvol info in inode_ctx

    Stashing additional information in the inode_ctx to help
    decide whether the migration information is stale, which could
    happen if a file was migrated several times but FOPs only detected
    the P1 migration phase. If no FOP detects the P2 phase, the inode
    ctx1 is never reset.
    We now save the src subvol as well as the dst subvol in the
    inode ctx. The src subvol is the subvol on which the FOP was sent
    when the mig info was set in the inode ctx. This information is
    considered stale if:
    1. The subvol on which the current FOP is sent is the same as
    the dst subvol in the ctx
    2. The subvol on which the current FOP is sent is not the same
    as the src subvol in the ctx

    This does not handle the case where the same file might have been
    renamed such that the src subvol is the same but the dst subvol
    is different. However, that is unlikely to happen very often.

    Change-Id: I05a2e9b107ee64750c7ca629aee03b03a02ef75f
    BUG: 1225809
    Signed-off-by: Nithya Balachandran <nbalacha at redhat.com>
    Reviewed-on: http://review.gluster.org/10967
    Tested-by: Gluster Build System <jenkins at build.gluster.com>
    Reviewed-by: Raghavendra G <rgowdapp at redhat.com>
    Tested-by: Raghavendra G <rgowdapp at redhat.com>
    Tested-by: NetBSD Build System <jenkins at build.gluster.org>

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