[Qemu-devel] [PATCH v4 0/7] block: allow commit active as top

[Fam Zheng <famz@redhat.com>]

Previously live commit of active block device is not supported, this series
implements it and updates corresponding qemu-iotests cases.

v4: Rewrite to reuse block/mirror.c.
    When committing the active layer, the job is internally a mirror job with
    type name faked to "commit".
    When the job completes, the BDSes are swapped, so the base image become
    active and [top, base) dropped.

Fam Zheng (7):
  block: add bdrv_common_ancestor()
  qmp: add internal sync mode "common" to mirror_start
  mirror: don't close target
  mirror: Add commit_job_type to perform commit with mirror code
  commit: support commit active layer
  commit: remove unused check
  qemu-iotests: update test cases for commit active

 block.c                    | 15 ++++++++++
 block/commit.c             |  7 -----
 block/mirror.c             | 29 +++++++++++++++---
 blockdev.c                 | 49 +++++++++++++++++++++++++++++--
 include/block/block.h      |  2 ++
 include/block/block_int.h  |  2 ++
 qapi-schema.json           |  2 +-
 tests/qemu-iotests/040     | 73 ++++++++++++++++++++--------------------------
 tests/qemu-iotests/041     |  5 ++++
 tests/qemu-iotests/041.out |  4 +--
 10 files changed, 129 insertions(+), 59 deletions(-)

-- 
1.8.3.1