[Qemu-devel] [PATCH V9 0/2] Implement sync modes for drive-backup.

[Ian Main <imain@redhat.com>]

This patch adds sync modes on top of the work that Stefan Hajnoczi has done.

These patches apply on kevin/block.

Hopefully all is in order as this is my first QEMU patch.  Many thanks to
Stephan and Fam Zheng for their help.

V2:

- No longer poll, instead use qemu_coroutine_yield().
- Use bdrv_co_is_allocated().
- Much better SYNC_MODE_NONE test.

V3:

- A few style fixes.
- Better commit message explaining how TOP and NONE operate.
- Verified using checkpatch.pl.

V4:

- Add patch to use the source as a backing hd during backup.
- Add patch to default sync mode none to qcow2.

V5:

- Fix qcow2 patch.  Forgot to git add final version.

V6:

- Default to requiring 'format' when mode is absolute-paths.
- Removed one bad hunk that was misapplying.
- Fixed docs, examples and tests to match changes.
- Added tests for format bad/missing.
- Added bdrv_set_in_use() to target.
- Default to qcow2 patch not required.

V7:

- Stripped it down to just implementing TOP and NONE.
- Split tests apart so that most can still run without needing backing files.
- Fixed SYNC_MODE_TOP logic.  Yes we copy more than needed but that is always
  the case really.  It's just a question of how big a block you want to copy.

V8:

- Fix qcow2 test for SYNC_MODE_NONE by shutting down VM before testing data.

V9:

- Make source drive bs for SYNC_MODE_NONE.
- Move SYNC_MODE_NONE test into 056.


Ian Main (2):
  Implement sync modes for drive-backup.
  Add tests for sync modes 'TOP' and 'NONE'

 block/backup.c                | 105 ++++++++++++++++++++++++++++++------------
 blockdev.c                    |  29 +++++++++---
 include/block/block_int.h     |   4 +-
 qmp-commands.hx               |   1 +
 tests/qemu-iotests/055        |   6 +++
 tests/qemu-iotests/055.out    |   4 +-
 tests/qemu-iotests/056        |  94 +++++++++++++++++++++++++++++++++++++
 tests/qemu-iotests/056.out    |   5 ++
 tests/qemu-iotests/group      |   1 +
 tests/qemu-iotests/iotests.py |   5 ++
 10 files changed, 214 insertions(+), 40 deletions(-)
 create mode 100755 tests/qemu-iotests/056
 create mode 100644 tests/qemu-iotests/056.out

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1.8.1.4