On 20.05.2015 08:16, Fam Zheng wrote:
It blocks device IO.

All bdrv_op_block_all/blk_op_block_all callers are taken care of:

- virtio_blk_data_plane_create
- virtio_scsi_hotplug

   Device creation, unblock it.

- bdrv_set_backing_hd

   Backing hd is not used by device, so blocking is OK.

- backup_start

   Blocking target when backup is running, unblock it.

- mirror_complete

   Blocking s->to_replace until mirror_exit, OK.

- block_job_complete

   The block job may be long running. Unblock it.

- init_blk_migration

   The block migration may be long running, Unblock it.

Signed-off-by: Fam Zheng <f...@redhat.com>
---
  blockjob.c                      | 1 +
  hw/block/dataplane/virtio-blk.c | 1 +
  hw/scsi/virtio-scsi.c           | 1 +
  include/block/block.h           | 1 +
  migration/block.c               | 1 +
  5 files changed, 5 insertions(+)

Reviewed-by: Max Reitz <mre...@redhat.com>

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