[Qemu-devel] [PATCH RFC 0/5] generic image locking and crash recovery

["Denis V. Lunev" <den@openvz.org>]

This series of patches is aimed to prevent usage of image
file by different qemu instances. In case we are the first
instance, and option lock is lockfile, - we lock the image file,
and if check option is on, we check the file and fix it if
nessecary. If one of this two ops fails - the image is closed
with the error.

Patchset is not polished at all! Sent for a discussion as an alternative
approach.

Signed-off-by: Olga Krishtal <okrishtal@virtuozzo.com>
Signed-off-by: Denis V. Lunev <den@openvz.org>
CC: Kevin Wolf <kwolf@redhat.com>
CC: Max Reitz <mreitz@redhat.com>
CC: Eric Blake <eblake@redhat.com>
CC: Fam Zheng <famz@redhat.com>

Olga Krishtal (5):
  block: added lock image option and callback
  block: implemented bdrv_lock_image for raw file
  block: added check image option and callback bdrv_is_opened_unclean
  qcow2: implemented bdrv_is_opened_unclean
  block/paralels: added paralles implementation for
    bdrv_is_opened_unclean

 block.c                   | 73 +++++++++++++++++++++++++++++++++++++++++++++++
 block/parallels.c         |  7 ++++-
 block/qcow2.c             | 11 ++++++-
 block/qcow2.h             |  1 +
 block/raw-posix.c         | 15 ++++++++++
 block/raw-win32.c         | 19 ++++++++++++
 include/block/block.h     |  2 ++
 include/block/block_int.h |  2 ++
 qapi/block-core.json      |  9 ++++++
 9 files changed, 137 insertions(+), 2 deletions(-)

-- 
2.1.4