[Qemu-devel] [PATCH v20 00/15] Drop in_use from BlockDriverState and enable point-in-time snapshot exporting over NBD

[Fam Zheng <famz@redhat.com>]

Thanks for Eric's and Markus' reviewing!

v20: Rebase to master, with minor improvements as listed below:

    [02/15] block: Introduce op_blockers to BlockDriverState
            Better error message in bdrv_op_is_blocked. (Markus)

    [03/15] block: Replace in_use with operation blocker
            Accurate commit message: why use bdrv_op_blocker_is_empty in
            block_job_create. (Markus)

    [06/15] block: Add backing_blocker in BlockDriverState
            Drop error_is_set().
            Call error_free() unconditionally.
            

    [08/15] block: Support dropping active in bdrv_drop_intermediate
            Fix list index in function comment. (Eric)

    [13/15] block: Add blockdev-backup to transaction
            Drop error_is_set().

    [14/15] qemu-iotests: Test blockdev-backup in 055
            Bump year in file header. (Eric)
 

v19: Rebase to master, resolve several contextual conflicts.
     Patch 05 has the only code change difference from v18 to preserve.
        assert(bs->backing_hd == NULL);

v18: Address reviewing comments from Jeff and Eric. Rebased to current master.
     Side by side diff from v17: http://bit.ly/1oO2Fvt

    [01/15] block: Add BlockOpType enum
            Add Jeff's reviewed-by.
            
    [02/15] block: Introduce op_blockers to BlockDriverState
            Add Jeff's reviewed-by.
            
    [03/15] block: Replace in_use with operation blocker
            Add Jeff's reviewed-by.
            
    [04/15] block: Move op_blocker check from block_job_create to its caller
            Add Jeff's reviewed-by.
            
    [05/15] block: Add bdrv_set_backing_hd()
            Don't unset bs->backing_file and bs->backing_format when
            backing_hd==NULL, because qcow2_close() will save these into image
            header.
            
    [08/15] block: Support dropping active in bdrv_drop_intermediate
            Swap parameters for bdrv_swap:
                bdrv_swap(active, base); -> bdrv_swap(base, active);
            Use bdrv_set_backing_hd().

    [10/15] commit: Use bdrv_drop_intermediate
            New. (Jeff)

    [11/15] qmp: Add command 'blockdev-backup'
            Since 2.0 -> Since 2.1. (Eric)

    [13/15] block: Add blockdev-backup to transaction
            Comment "Since 2.1" for blockdev-backup. (Eric)

    [15/15] qemu-iotests: Image fleecing test case 089
            Case number 083 -> 089.


Fam Zheng (15):
  block: Add BlockOpType enum
  block: Introduce op_blockers to BlockDriverState
  block: Replace in_use with operation blocker
  block: Move op_blocker check from block_job_create to its caller
  block: Add bdrv_set_backing_hd()
  block: Add backing_blocker in BlockDriverState
  block: Parse "backing" option to reference existing BDS
  block: Support dropping active in bdrv_drop_intermediate
  stream: Use bdrv_drop_intermediate and drop close_unused_images
  commit: Use bdrv_drop_intermediate
  qmp: Add command 'blockdev-backup'
  block: Allow backup on referenced named BlockDriverState
  block: Add blockdev-backup to transaction
  qemu-iotests: Test blockdev-backup in 055
  qemu-iotests: Image fleecing test case 089

 block-migration.c               |   7 +-
 block.c                         | 310 +++++++++++++++++++++++++++-------------
 block/backup.c                  |  26 ++++
 block/commit.c                  |   2 +-
 block/mirror.c                  |   9 +-
 block/stream.c                  |  42 +-----
 blockdev.c                      | 122 ++++++++++++++--
 blockjob.c                      |  14 +-
 hw/block/dataplane/virtio-blk.c |  18 ++-
 include/block/block.h           |  29 +++-
 include/block/block_int.h       |   9 +-
 include/block/blockjob.h        |   3 +
 qapi-schema.json                |  52 +++++++
 qmp-commands.hx                 |  44 ++++++
 tests/qemu-iotests/055          | 277 +++++++++++++++++++++++++++++------
 tests/qemu-iotests/055.out      |   4 +-
 tests/qemu-iotests/089          |  99 +++++++++++++
 tests/qemu-iotests/089.out      |   5 +
 tests/qemu-iotests/group        |   1 +
 19 files changed, 856 insertions(+), 217 deletions(-)
 create mode 100755 tests/qemu-iotests/089
 create mode 100644 tests/qemu-iotests/089.out

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1.9.2