[Qemu-block] [PATCH v4 0/4] Add 'x-blockdev-del' command

[Alberto Garcia]

This version has only documentation and test fixes.

Most are cosmetic changes, but there were two missing wait_ready() and
wait_until_completed() calls that could break one of the tests.

Regards,

Berto

v4:
- patch 3: s/being used/in use/ [Max]
- patch 3: add 'blockdev-add' command to the 'x-blockdev-del' example
  in qmp-commands.hx [Max]
- patch 4: clarify that the BlkDebug and BlkVerify are not meant to be
  real use cases of those drivers, but only to test the sanity checks
  of 'x-blockdev-del' [Max]
- patch 4: fix addBlockDriverStateOverlay() documentation [Max]
- patch 4: add missing wait_ready() and wait_until_completed() calls

v3: https://lists.gnu.org/archive/html/qemu-block/2015-10/msg00854.html
- Remove the extra references added in v2 to the mirror and backup
  jobs, and use op blockers instead (for the mirror case only).

v2: https://lists.gnu.org/archive/html/qemu-block/2015-10/msg00828.html
- Rename it as 'x-blockdev-del' and label it as experimental.
- Use two parameters instead of just one. If you try to delete a BDS,
  it must not be attached to any backend.
- New test cases.
- Hold extra references during the mirror and backup block jobs.

v1: https://lists.gnu.org/archive/html/qemu-devel/2015-10/msg02999.html
- Initial implementation

Alberto Garcia (4):
  mirror: block all operations on the target image during the job
  block: Add blk_get_refcnt()
  block: Add 'x-blockdev-del' QMP command
  iotests: Add tests for the x-blockdev-del command

 block/block-backend.c          |   5 +
 block/mirror.c                 |   4 +
 blockdev.c                     |  66 +++++++
 include/sysemu/block-backend.h |   1 +
 qapi/block-core.json           |  32 +++-
 qmp-commands.hx                |  61 +++++-
 tests/qemu-iotests/139         | 414 +++++++++++++++++++++++++++++++++++++++++
 tests/qemu-iotests/139.out     |   5 +
 tests/qemu-iotests/group       |   1 +
 9 files changed, 585 insertions(+), 4 deletions(-)
 create mode 100644 tests/qemu-iotests/139
 create mode 100644 tests/qemu-iotests/139.out

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2.6.1