OpenAFS Master Repository branch, master, updated. openafs-devel-1_5_76-2488-g193a56a

[Gerrit Code Review]

The following commit has been merged in the master branch:
commit 1af906799b2de90d41139dadaf2dd654e4fd2df3
Author: Jeffrey Altman <jaltman@your-file-system.com>
Date:   Sat May 5 20:46:08 2012 -0400

    Windows: Make CM resilient to transient VNOVOL
    
    The 1.6.0 and 1.6.1 file servers send transient VNOVOL errors which
    are no indicative of the volume not being present.  For example,
    VNOVOL can be sent during a transition to a VBUSY state prior to
    salvaging or when cloning a .backup volume instance.  As a result
    the cache manager must attempt at least one retry when a VNOVOL is
    receive but there are no changes to the volume location information.
    
    This patchset records the VNOVOL error in the cm_req_t structure
    If the volume is replicated, the volume's server reference into a busy state.
    If the volume is not replicated, the thread is paused for two seconds.
    In both cases, the request is retried.  If the VNOVOL error is received
    a second time from the same server, the volume server reference is
    deleted as before.  This is done to prevent repeated requests to the
    VLDB server and the file server that are expected to fail.  The server
    reference will be restored to the volume on the next volume location
    update.
    
    Change-Id: Ica51f853683f80cb17c804cdc216f7a113cca60a
    Reviewed-on: http://gerrit.openafs.org/7353
    Tested-by: BuildBot <buildbot@rampaginggeek.com>
    Tested-by: Jeffrey Altman <jaltman@secure-endpoints.com>
    Reviewed-by: Jeffrey Altman <jaltman@secure-endpoints.com>

 src/WINNT/afsd/cm_conn.c |   64 +++++++++++++++++++++++++++++++++-------------
 src/WINNT/afsd/cm_conn.h |    3 +-
 2 files changed, 48 insertions(+), 19 deletions(-)

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