OpenAFS Master Repository branch, openafs-devel-1_7_x, updated. openafs-devel-1_7_21-115-g36235ec

[Gerrit Code Review]

The following commit has been merged in the openafs-devel-1_7_x branch:
commit 36235ecd6834d5c3dfe4c6639f26e15cee33058a
Author: Jeffrey Altman <jaltman@your-file-system.com>
Date:   Sun Dec 16 12:42:17 2012 -0500

    Windows: Direct IO Support for Service
    
    This patchset implements and enables by default the new
    Direct IO pathway between the AFS redirector and the afsd_service.exe.
    When Direct IO is enabled all reads and writes are performed by the
    AFS redirector locking memory allocated by the kernel and mapping it into
    the service's memory address space.
    
    The service supports cache bypass in this mode when the
    AFS_REQUEST_FLAG_CACHE_BYPASS flag is set in the request from the
    redirector.  When cache bypass is active, the AFSCache file is ignored and
    data is either directly fetched from or stored to the file server.  Cache
    bypass is enabled by IIS and other applications that request no
    intermediate buffering when opening file handles.   This is often done
    because the application implements its own data caching.  All cache bypass
    store operations are synchronous.
    
    When cache bypass is not enabled, the memory region provided by the AFS
    redirector is either used to populate the cm_buf_t objects or is populated
    by them.  When cache bypass is not enabled, one outstanding store
    operation can be in flight asynchronously to improve performance.
    
    Direct IO is enabled by default and can be disabled by creating the
    registry value.
    
      ..\Services\TransarcAFSDaemon\Parameters
      "DirectIO"  DWORD  0x0
    
    Reviewed-on: http://gerrit.openafs.org/9211
    Tested-by: BuildBot <buildbot@rampaginggeek.com>
    Reviewed-by: Jeffrey Altman <jaltman@your-file-system.com>
    (cherry picked from commit 2ca80b4b6a3fde34b5eeeba37d2df5a9e253d787)
    
    Change-Id: Ibe0956428209ce91c8b1ca2da2bb81dd05a474b9
    Reviewed-on: http://gerrit.openafs.org/9226
    Tested-by: BuildBot <buildbot@rampaginggeek.com>
    Reviewed-by: Jeffrey Altman <jaltman@your-file-system.com>

 doc/xml/ReleaseNotesWindows/relnotes.xml |   19 +
 src/WINNT/afsd/NTMakefile                |    1 +
 src/WINNT/afsd/afsd.h                    |    3 +
 src/WINNT/afsd/afsd_init.c               |   11 +
 src/WINNT/afsd/cm_daemon.c               |    7 +-
 src/WINNT/afsd/cm_dcache.c               |    2 +
 src/WINNT/afsd/cm_direct.c               |  575 ++++++++++++++++++++++++++++++
 src/WINNT/afsd/cm_direct.h               |   68 ++++
 src/WINNT/afsrdr/user/RDRFunction.c      |  305 ++++++++++++++++
 src/WINNT/afsrdr/user/RDRInit.cpp        |   73 ++++-
 src/WINNT/afsrdr/user/RDRPrototypes.h    |   23 ++
 11 files changed, 1080 insertions(+), 7 deletions(-)

-- 
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