Hi,
I tried the patch v3,with the following config.
Guest os : win7 32bit professional
Host os : fedora 17
Command:
qemu-kvm -enable-kvm -name win7 -M pc-0.15 -m 1024 -smp 2 -boot c -device
virtio-serial -drive
file=/home/libaiqing/vss/win7.img,if=virtio,index=0,format=qcow2 - -monitor
stdio -vga qxl -vnc :1 -chardev
socket,id=charchannel0,path=/var/lib/libvirt/qemu/wahaha1_requester,server,nowait
-device
virtserialport,chardev=charchannel0,id=channel0,name=org.qemu.guest_agent.0
Output:
[root@fedora121 ~]# socat stdio,ignoreeof
unix-connect:/var/lib/libvirt/qemu/wahaha1_requester
{"execute":"guest-fsfreeze-freeze"}
{"return": 2}
{"execute":"guest-fsfreeze-status"}
{"return": "frozen"}
{"execute":"guest-fsfreeze-thaw"}
{"error": {"class": "GenericError", "desc": "DoSnapshotSet. (Error:
8004230f) "}}
{"execute":"guest-fsfreeze-status"}
{"return": "thawed"}
{"execute":"guest-fsfreeze-freeze"}
{"return": 2}
{"execute":"guest-fsfreeze-status"}
{"return": "frozen"}
{"execute":"guest-fsfreeze-thaw"}
{"error": {"class": "GenericError", "desc": "DoSnapshotSet. (Error:
80042314) "}}
{"execute":"guest-fsfreeze-status"}
{"return": "thawed"}
Issue:
1 Extcuting the command "guest-fsfreeze-thaw" failed,but the fs status is
changed to thawed.Is this ok?
2 Extcuting the command "guest-fsfreeze-thaw" twice,the desc is different
each time.
Could you give me some advise to debug this problem ? I can provide more
information if need.
Regards,
baiqing
> -----Original Message-----
> From: qemu-devel-bounces+libaiqing=huawei....@nongnu.org
> [mailto:qemu-devel-bounces+libaiqing=huawei....@nongnu.org] On Behalf Of
> Tomoki Sekiyama
> Sent: Tuesday, May 21, 2013 11:34 PM
> To: qemu-devel@nongnu.org
> Cc: mdr...@linux.vnet.ibm.com; lcapitul...@redhat.com;
> vroze...@redhat.com; pbonz...@redhat.com; seiji.agu...@hds.com;
> ar...@redhat.com
> Subject: [Qemu-devel] [RFC PATCH v3 00/11] qemu-ga: fsfreeze on Windows
> using VSS
>
> Hi,
>
> This patch series adds fsfreeze support for Windows qemu-guest-agent.
>
> changes from v2:
> - [06/11] Fix errors in Windows 7, reported by Li Baiqing
> (see below for details).
>
> changes from v1:
> - Fix out-tree build by stop using recursive Makefile
> - Added script to extract VSS SDK headers on POSIX systems using msitools
> (thanks Paolo)
> - Remove some unnecessary header files
>
> v2: http://lists.gnu.org/archive/html/qemu-devel/2013-04/msg02518.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
>
> - 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
>
>
> * About errors in Windows 7 with patch v2
> VSS requires to write to snapshot volumes just before making them read-only
> at final commit phase. This feature is called `auto-recovery'
> (See
> http://msdn.microsoft.com/en-us/library/windows/desktop/aa384651(v=vs.85)
> .aspx#base.vssgloss_auto_recoved_shadow_copy for details).
>
> Since qemu and libvirt don't have feature to handle writable snapshots,
> this patchset just disables auto-recovery by specifying
> VSS_VOLSNAP_ATTR_NO_AUTORECOVERY flag to SetContext.
> Unfortunately, this flag seems unsupported in Windows 7 or earlier.
> It tries to look up the snapshot volumes to write and fails in
> VSS_E_OBJECT_NOT_FOUND.
>
> For fundamental resolution we need a framework for guests to query
> snapshots
> and to mount them as writable snapshots, but we just ignore the error in
> this patchset.
>
> Any feedback are appliciated.
>
> ---
> Tomoki Sekiyama (11):
> configure: Support configuring c++ compiler
> Fix errors and warnings while compiling with c++ compilier
> Add a script to extract VSS SDK headers on POSIX system
> qemu-ga: Add an configure option to specify path to Windows VSS SDK
> qemu-ga: Add Windows VSS provider to quiesce applications on fsfreeze
> qemu-ga: Add Windows VSS requester to quisce applications and
> filesystems
> qemu-ga: call Windows VSS requester in fsfreeze command handler
> qemu-ga: install Windows VSS provider on `qemu-ga -s install'
> qemu-ga: Add VSS provider .tlb file in the repository
> QMP/qemu-ga-client: make timeout longer for guest-fsfreeze-freeze
> command
> QMP/qmp.py: set locale for exceptions to display non-ascii messages
> correctly
>
>
> .gitignore | 1
> Makefile | 3
> Makefile.objs | 2
> QMP/qemu-ga-client | 4
> QMP/qmp.py | 4
> configure | 59 ++++
> hmp.c | 2
> hw/pci/pci.c | 2
> qga/Makefile.objs | 7
> qga/commands-win32.c | 74 ++++-
> qga/main.c | 41 +++
> qga/vss-win32-provider.h | 26 ++
> qga/vss-win32-provider/Makefile.objs | 25 ++
> qga/vss-win32-provider/install.cpp | 494
> +++++++++++++++++++++++++++++++
> qga/vss-win32-provider/provider.cpp | 474
> ++++++++++++++++++++++++++++++
> qga/vss-win32-provider/qga-provider.def | 10 +
> qga/vss-win32-provider/qga-provider.idl | 20 +
> qga/vss-win32-provider/qga-provider.tlb | Bin
> qga/vss-win32-requester.cpp | 404
> +++++++++++++++++++++++++
> qga/vss-win32-requester.h | 31 ++
> qga/vss-win32.h | 85 +++++
> rules.mak | 9 +
> scripts/extract-vsssdk-headers | 25 ++
> scripts/qapi.py | 9 +
> 24 files changed, 1796 insertions(+), 15 deletions(-)
> create mode 100644 qga/vss-win32-provider.h
> 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
>
