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Re: [Qemu-devel] [PATCH v6 00/10] qemu-ga: fsfreeze on Windows using VSS


From: Libaiqing
Subject: Re: [Qemu-devel] [PATCH v6 00/10] qemu-ga: fsfreeze on Windows using VSS
Date: Mon, 15 Jul 2013 09:23:45 +0000

Hi tomoki,
    I test the patch v6.
    When calling the command " guest-fsfreeze-freeze ", an error occurs.
    The desc is "{"error": {"class": "GenericError", "desc": "failed to 
initialize for backup:  (error: 80042302)"}}"
    The eventlog in the guest is : EventID 8193;CoCreateInstanceerror hr= 
0x800401f0,CoInitialize is not called.Opertion :backup init.        
    
    When executing the qemu-ga.exe from the commandline,it goes well.
    Running the same configuration with the patch v5,it goes well. 

    I can provide more information if need.

Thanks
Baiqing.

> -----Original Message-----
> From: Tomoki Sekiyama [mailto:address@hidden
> Sent: Thursday, July 11, 2013 5:02 AM
> To: address@hidden
> Cc: Libaiqing; address@hidden; address@hidden;
> address@hidden; address@hidden; address@hidden;
> address@hidden; address@hidden; address@hidden;
> address@hidden; address@hidden
> Subject: [PATCH v6 00/10] qemu-ga: fsfreeze on Windows using VSS
> 
> Hi,
> 
> This is v6 of patch series to add fsfreeze for Windows qemu-guest-agent.
> 
> changes from v5:
>  - Move VSS requester code into the DLL
>    -- Merge patch v5 06/11(add provider) and patch v5 08/11(add requester)
>       (-> patch v6 07/10)
>    -- Rename qga-provider.dll to qga-vss.dll
>    -- Rearrange files in qga/vss-win32* and rename some functions
>    -- Introduce ErrorSet structure to call error_set_win32() as callback
>       in order to set errors in the DLL without linking glib etc.
>  - Make qemu-ga.exe work without qga-vss.dll even though it is configured
>    "--with-vss-sdk", although fsfreeze is disabled. (patch 08/10, 09/10)
>  - Introduce COMPointer<T> that automates release of COM objects to
> avoid
>    leaks. (patch 07/10)
> 
> v5:
> http://lists.nongnu.org/archive/html/qemu-devel/2013-07/msg00605.html
> 
> 
> * Description
>   In Windows, VSS (Volume Shadow Copy Service) provides a facility to
>   quiesce filesystems and applications before disk snapshots are taken.
>   This patch series implements "fsfreeze" command of qemu-ga using VSS.
> 
> 
> * How to build & run qemu-ga with VSS support
> 
>  - Download Microsoft VSS SDK from:
>    http://www.microsoft.com/en-us/download/details.aspx?id=23490
> 
>  - Setup the SDK
>    scripts/extract-vsssdk-headers setup.exe (on POSIX-systems)
> 
>  - Specify installed SDK directory to configure option as:
>    ./configure -with-vss-sdk="path/to/VSS SDK"
> --cross-prefix=i686-w64-mingw32-
> 
>  - make qemu-ga.exe qga/vss-win32/qga-vss.{dll,tlb}
> 
>  - Install qemu-ga.exe, qga/vss-win32/qga-vss.{dll,tlb}, and
>    the other required mingw libraries into the same directory in guests
> 
>  - Run `qemu-ga.exe -s install' and `net start qemu-ga' in the guests
> 
> Any feedback are appreciated.
> 
> ---
> Tomoki Sekiyama (10):
>       configure: Support configuring C++ compiler
>       Add c++ keywords to QAPI helper script
>       checkpatch.pl: Check .cpp files
>       Add a script to extract VSS SDK headers on POSIX system
>       qemu-ga: Add configure options to specify path to Windows/VSS SDK
>       error: Add error_set_win32 and error_setg_win32
>       qemu-ga: Add Windows VSS provider and requester as DLL
>       qemu-ga: Call Windows VSS requester in fsfreeze command handler
>       qemu-ga: Install Windows VSS provider on `qemu-ga -s install'
>       QMP/qemu-ga-client: Make timeout longer for guest-fsfreeze-freeze
> command
> 
> 
>  .gitignore                     |    1
>  Makefile                       |    3
>  Makefile.objs                  |    2
>  QMP/qemu-ga-client             |    4
>  configure                      |   87 +++++++
>  hmp.c                          |    2
>  hw/pci/pci.c                   |    2
>  include/qapi/error.h           |   13 +
>  qga/Makefile.objs              |    5
>  qga/commands-win32.c           |   82 ++++++
>  qga/main.c                     |   10 +
>  qga/vss-win32.c                |  154 ++++++++++++
>  qga/vss-win32.h                |   27 ++
>  qga/vss-win32/Makefile.objs    |   23 ++
>  qga/vss-win32/install.cpp      |  424
> +++++++++++++++++++++++++++++++++
>  qga/vss-win32/provider.cpp     |  513
> ++++++++++++++++++++++++++++++++++++++++
>  qga/vss-win32/qga-vss.def      |   13 +
>  qga/vss-win32/qga-vss.idl      |   20 ++
>  qga/vss-win32/qga-vss.tlb      |  Bin
>  qga/vss-win32/requester.cpp    |  486
> ++++++++++++++++++++++++++++++++++++++
>  qga/vss-win32/requester.h      |   42 +++
>  qga/vss-win32/vss-common.h     |  128 ++++++++++
>  rules.mak                      |    9 +
>  scripts/checkpatch.pl          |   37 ++-
>  scripts/extract-vsssdk-headers |   35 +++
>  scripts/qapi.py                |   12 +
>  util/error.c                   |   35 +++
>  27 files changed, 2145 insertions(+), 24 deletions(-)
>  create mode 100644 qga/vss-win32.c
>  create mode 100644 qga/vss-win32.h
>  create mode 100644 qga/vss-win32/Makefile.objs
>  create mode 100644 qga/vss-win32/install.cpp
>  create mode 100644 qga/vss-win32/provider.cpp
>  create mode 100644 qga/vss-win32/qga-vss.def
>  create mode 100644 qga/vss-win32/qga-vss.idl
>  create mode 100644 qga/vss-win32/qga-vss.tlb
>  create mode 100644 qga/vss-win32/requester.cpp
>  create mode 100644 qga/vss-win32/requester.h
>  create mode 100644 qga/vss-win32/vss-common.h
>  create mode 100755 scripts/extract-vsssdk-headers


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