qemu-ga: fsfreeze on Windows using VSS

Hi,

I rebased the patch series to add fsfreeze for Windows qemu-ga.

changes from v9:
- Fix conflict with commit e8ef31a3518c "qemu-ga: build it even if !system"

changes from v8:
- Add hEventTimeout to improve timeout error message (patch 07, see below)
- Build qga-vss.tlb if configure'd --with-win-sdk (patch 05, 07)
- Use "qga-vss-dll-obj-$(CONFIG_QGA_VSS)" in Makefile.objs (patch 07)
- Fix typo in QGAVSSRequesterFunc (patch 07, 08)

v9: http://lists.nongnu.org/archive/html/qemu-devel/2013-07/msg06071.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 --cross-prefix=i686-w64-mingw32- \
               --with-vss-sdk="path/to/VSS SDK" \
               --without-systems --without-tools

- 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                      |   96 +++++++
 hmp.c                          |    2 
 hw/pci/pci.c                   |    2 
 include/qapi/error.h           |   13 +
 qga/Makefile.objs              |    3 
 qga/commands-win32.c           |   82 ++++++
 qga/main.c                     |   10 +
 qga/vss-win32.c                |  166 +++++++++++++
 qga/vss-win32.h                |   27 ++
 qga/vss-win32/Makefile.objs    |   23 ++
 qga/vss-win32/install.cpp      |  458 +++++++++++++++++++++++++++++++++++
 qga/vss-win32/provider.cpp     |  523 ++++++++++++++++++++++++++++++++++++++++
 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    |  507 +++++++++++++++++++++++++++++++++++++++
 qga/vss-win32/requester.h      |   42 +++
 qga/vss-win32/vss-common.h     |  129 ++++++++++
 rules.mak                      |    9 +
 scripts/checkpatch.pl          |   34 ++-
 scripts/extract-vsssdk-headers |   35 +++
 scripts/qapi.py                |   12 +
 util/error.c                   |   35 +++
 27 files changed, 2229 insertions(+), 22 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