Quoting Tomoki Sekiyama (2014-01-13 11:25:14) > Current functionarity of qemu-ga VSS provider is limited to implement > filesystems freeze, and doesn't support the creation of shadow copies > within the guest. > However, when no other hardware snapshot provider is installed, VSS may > choose qemu-ga VSS provider to create shadow copies and fail with > VSS_E_UNEXPECTED_PROVIDER_ERROR. > Similar issue occurs when the requester deletes shadow copies. > > This patchset fix this issue by telling VSS that the volume is not > supported by qemu-ga VSS provider when it is kicked by other requesters. > > It also fixes wrong error handling around OpenEvent/CreateEvent WinAPI, > which returns NULL instead of INVALID_HANDLE_VALUE on errors. > > https://bugzilla.redhat.com/show_bug.cgi?id=1036341 > > --- > Tomoki Sekiyama (3): > qga: vss-win32: Use NULL as an invalid pointer for OpenEvent and > CreateEvent > qga: vss-win32: Fix interference with snapshot creation by other VSS > requesters > qga: vss-win32: Fix interference with snapshot deletion by other VSS > request
Thanks, applied to qga tree: https://github.com/mdroth/qemu/commits/qga > > > qga/vss-win32/provider.cpp | 21 ++++++++++--- > qga/vss-win32/requester.cpp | 70 > ++++++++++++++++++++----------------------- > 2 files changed, 49 insertions(+), 42 deletions(-) > > -- > Tomoki Sekiyama