[Qemu-devel] [PATCH v2 0/2] Add 'blockdev-snapshot' command

[Alberto Garcia <berto@igalia.com>]

Previous attempt to extend blockdev-snapshot-sync:
   https://lists.gnu.org/archive/html/qemu-block/2015-08/msg00236.html

As discussed in the previous thread, this adds a new command called
'blockdev-snapshot', that simply takes references to two existing
block devices. I decided to share most of the implementation with the
previous 'blockdev-snapshot-sync' since the only differences are in
the 'prepare' step.

The tests are missing, but I wanted to know first if you are otherwise
OK with this approach. If the patches look good I'll write the tests
next week.

These patches apply on top of two series from Max:

 - This one allows creating BDS that are not attached to a BlockBackend
   https://lists.gnu.org/archive/html/qemu-block/2015-07/msg00382.html

 - This one drops the drv parameter from bdrv_open(), which was
   preventing us from creating snapshots of images opened with custom
   runtime options:
   https://lists.gnu.org/archive/html/qemu-block/2015-08/msg00189.html

You cannot apply these two series cleanly on top of each other, so if
you want to try my patches without having to merge everything
manually, you can get the whole thing here:

   https://github.com/bertogg/qemu/commits/blockdev-snapshot

Comments are welcome!

Berto

Alberto Garcia (2):
  block: rename BlockdevSnapshot to BlockdevSnapshotSync
  block: add a 'blockdev-snapshot' QMP command

 blockdev.c           | 156 ++++++++++++++++++++++++++++++++-------------------
 qapi-schema.json     |   3 +-
 qapi/block-core.json |  32 ++++++++++-
 qmp-commands.hx      |  28 +++++++++
 4 files changed, 158 insertions(+), 61 deletions(-)

-- 
2.5.1