[Bugs] [Bug 1457616] "split-brain observed [Input/output error]" error messages in samba logs during parallel rm -rf

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1457616



--- Comment #5 from Worker Ant <bugzilla-bot at gluster.org> ---
COMMIT: https://review.gluster.org/17434 committed in release-3.11 by
Shyamsundar Ranganathan (srangana at redhat.com) 
------
commit cced21a21528cebee7220b732fd26191ea5a83c3
Author: Ravishankar N <ravishankar at redhat.com>
Date:   Mon Jun 5 09:40:51 2017 +0530

    afr: add errno to afr_inode_refresh_done()

    Backport of https://review.gluster.org/17413 and
    https://review.gluster.org/17436

    Problem:
    When parellel `rm -rf`s were being done from cifs clients, opendir might
    fail on some replicas with ENOENT. DHT ignores partial opendir failures
    in dht_fd_cbk() and winds readdirs on those replicas. Afr inode refresh
    (as a part of readdirp read_txn) sees in its fd context that the state
    of the fds is *not* AFR_FD_OPENED and bails out to
    afr_inode_refresh_done() without doing a refresh. When this happens, the
    errno is set as EIO due to lack of readable subvols, logging split-brain
    messages in the logs.

    Fix:
    Introduce an errno argument to afr_inode_refresh_do() to bail out with
    the right error value when inode refresh is not performed.

    Change-Id: I075707fbb73fd93a923b77b923a96aac79e847f9
    BUG: 1457616
    Signed-off-by: Ravishankar N <ravishankar at redhat.com>
    Reviewed-on: https://review.gluster.org/17434
    Smoke: Gluster Build System <jenkins at build.gluster.org>
    NetBSD-regression: NetBSD Build System <jenkins at build.gluster.org>
    CentOS-regression: Gluster Build System <jenkins at build.gluster.org>
    Reviewed-by: Pranith Kumar Karampuri <pkarampu at redhat.com>

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