OpenAFS Master Repository branch, master, updated. openafs-devel-1_5_76-3355-g1f891b6

[Gerrit Code Review]

The following commit has been merged in the master branch:
commit 1f891b622e9b32a068082087eae9d787057f7f00
Author: Mark Vitale <mvitale@sinenomine.net>
Date:   Fri Dec 21 17:56:14 2012 -0500

    dafs: preattach should wait for exclusive states
    
    In rare circumstances an FSYNC_VOL_ON operation may fail silently,
    leaving the volume in its previous state.  The only clue is a FileLog
    message "volume <nnnn> not in quiescent state".
    
    This is caused by a race condition in the volume package: an
    FSYNC_VOL_ON operation is attempting to preattach a volume
    (in VPreAttachVolumeByVp_r()) at the same time a fileserver RPC
    (e.g. FetchStatus) is detaching the volume (in VReleaseVolumeHandles_r())
    at the conclusion of attach2() logic.
    
    The fix calls VWaitExclusiveState_r() before calling
    VPreAttachVolumeByVp_r().
    
    Change-Id: Ib66859381d29311fda3e08984dcb740eadafb340
    Reviewed-on: http://gerrit.openafs.org/8814
    Tested-by: BuildBot <buildbot@rampaginggeek.com>
    Reviewed-by: Andrew Deason <adeason@sinenomine.net>
    Reviewed-by: Derrick Brashear <shadow@your-file-system.com>

 src/vol/volume.c |   22 ++++++++++++++++++++++
 1 files changed, 22 insertions(+), 0 deletions(-)

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