[Bugs] [Bug 1311578] SMB: SMB crashes with AIO enabled on reads + vers=3.0

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1311578



--- Comment #5 from Vijay Bellur <vbellur at redhat.com> ---
COMMIT: http://review.gluster.org/13512 committed in release-3.7 by Niels de
Vos (ndevos at redhat.com) 
------
commit e761050fb44b28c0641dd87f5fbc9d1511bed92b
Author: Rajesh Joseph <rjoseph at redhat.com>
Date:   Tue Feb 2 04:22:04 2016 +0530

    libgfapi: glfd close is not correctly handled for async fop

    There is chance that before the async fop is complete client can send
    a close. libgfapi destroys glfd on close. Therefore it can lead to
    crash or unexpected behaviour when the pening fop reaches libgfapi
    layer. Currently we don't provide any api to cancel these outstanding
    fops neither we check if the glfd is already closed or not.

    Therefore as a fix provided refcount for glfd. Each fop (sync or async)
    will take a ref and once the fop is complete it will unref the refcount.
    We should not call the registered callback function if glfd is already
    closed. To achieve this we maintain state of glfd so that we can safely
    take a call if the fd is closed or not.

    Backport of commit 88d772c05c45c467bfccebfc51f6a0e0ea9ca287:
    > Change-Id: Ibe71b2225312db3f1be66b244fcf8826c70c357d
    > BUG: 1303995
    > Signed-off-by: Rajesh Joseph <rjoseph at redhat.com>
    > Reviewed-on: http://review.gluster.org/13340
    > Smoke: Gluster Build System <jenkins at build.gluster.com>
    > CentOS-regression: Gluster Build System <jenkins at build.gluster.com>
    > Reviewed-by: Shyamsundar Ranganathan <srangana at redhat.com>
    > NetBSD-regression: NetBSD Build System <jenkins at build.gluster.org>

    Change-Id: I1e01690ea72f34c12465eb084d7a1aa9de0d7b83
    BUG: 1311578
    Signed-off-by: Rajesh Joseph <rjoseph at redhat.com>
    Reviewed-on: http://review.gluster.org/13512
    NetBSD-regression: NetBSD Build System <jenkins at build.gluster.org>
    CentOS-regression: Gluster Build System <jenkins at build.gluster.com>
    Reviewed-by: Niels de Vos <ndevos at redhat.com>
    Smoke: Gluster Build System <jenkins at build.gluster.com>

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