[Qemu-devel] [PATCH v5 00/11] qemu-ga: fsfreeze on Windows using VSS

[Tomoki Sekiyama <tomoki.sekiyama@hds.com>]

Hi,

This is v5 of patch series to add fsfreeze for Windows qemu-guest-agent.

changes from v4:
 -[03/11] Suppress warning about spacing arond 'catch' keyword in C++
 -[06/11] Rename qga-prv-obj-y to qga-provider-obj-y
 -[06/11] Rework reference counting for CQGAVssProviderFactory
 -[07/11 (newly added)] Make error_set_win32() more generic
 -[08/11] Introduce struct QGAVSSContext to manage vss context
 -[09/11] Add guest_fsfreeze_cleanup to thaw the system on exit
 -[06-10] Print error messages to stderr instead of stdout or dialog
 -[06-10] Improve error handling and fix leaks
 -[06-10] Remove HAS_VSS_SDK macro (also reduce #ifdef's)
 -[06-10] Stop linking qemu-ga.exe and qga-provider.dll
 -[06-10] Fix coding style

v4: http://lists.nongnu.org/archive/html/qemu-devel/2013-06/msg00959.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-provider/qga-provider.{dll,tlb}
   (From this version, .dll/.tlb must be explicitly specified.)

 - Install qemu-ga.exe, qga/vss-win32-provider/qga-provider.{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 (11):
      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
      qemu-ga: Add Windows VSS provider to quiesce applications on fsfreeze
      error: Add error_set_win32 and error_setg_win32
      qemu-ga: Add Windows VSS requester to quiesce applications and filesystems
      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                    |   14 +
 qga/Makefile.objs                       |    6 
 qga/commands-win32.c                    |   84 ++++-
 qga/main.c                              |   23 +
 qga/vss-win32-provider/Makefile.objs    |   23 +
 qga/vss-win32-provider/install.cpp      |  489 +++++++++++++++++++++++++++
 qga/vss-win32-provider/provider.cpp     |  513 ++++++++++++++++++++++++++++
 qga/vss-win32-provider/qga-provider.def |    9 
 qga/vss-win32-provider/qga-provider.idl |   20 +
 qga/vss-win32-provider/qga-provider.tlb |  Bin
 qga/vss-win32-requester.cpp             |  572 +++++++++++++++++++++++++++++++
 qga/vss-win32-requester.h               |   52 +++
 qga/vss-win32.h                         |   88 +++++
 rules.mak                               |    9 
 scripts/checkpatch.pl                   |   37 ++
 scripts/extract-vsssdk-headers          |   35 ++
 scripts/qapi.py                         |   12 +
 util/error.c                            |   35 ++
 25 files changed, 2097 insertions(+), 25 deletions(-)
 create mode 100644 qga/vss-win32-provider/Makefile.objs
 create mode 100644 qga/vss-win32-provider/install.cpp
 create mode 100644 qga/vss-win32-provider/provider.cpp
 create mode 100644 qga/vss-win32-provider/qga-provider.def
 create mode 100644 qga/vss-win32-provider/qga-provider.idl
 create mode 100644 qga/vss-win32-provider/qga-provider.tlb
 create mode 100644 qga/vss-win32-requester.cpp
 create mode 100644 qga/vss-win32-requester.h
 create mode 100644 qga/vss-win32.h
 create mode 100755 scripts/extract-vsssdk-headers