Merge tag 'for-upstream' of https://repo.or.cz/qemu/kevin into staging

Block layer patches

- virtio-blk: use blk_io_plug_call() instead of notification BH
- mirror: allow switching from background

Merge tag 'for-upstream' of https://repo.or.cz/qemu/kevin into staging

Block layer patches

- virtio-blk: use blk_io_plug_call() instead of notification BH
- mirror: allow switching from background to active mode
- qemu-img rebase: add compression support
- Fix locking in media change monitor commands
- Fix a few blockjob-related deadlocks when using iothread

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* tag 'for-upstream' of https://repo.or.cz/qemu/kevin: (27 commits)
iotests: add test for changing mirror's copy_mode
mirror: return mirror-specific information upon query
blockjob: query driver-specific info via a new 'query' driver method
qapi/block-core: turn BlockJobInfo into a union
qapi/block-core: use JobType for BlockJobInfo's type
mirror: implement mirror_change method
block/mirror: determine copy_to_target only once
block/mirror: move dirty bitmap to filter
block/mirror: set actively_synced even after the job is ready
blockjob: introduce block-job-change QMP command
virtio-blk: remove batch notification BH
virtio: use defer_call() in virtio_irqfd_notify()
util/defer-call: move defer_call() to util/
block: rename blk_io_plug_call() API to defer_call()
blockdev: mirror: avoid potential deadlock when using iothread
block: avoid potential deadlock during bdrv_graph_wrlock() in bdrv_close()
blockjob: drop AioContext lock before calling bdrv_graph_wrlock()
iotests: Test media change with iothreads
block: Fix locking in media change monitor commands
iotests: add tests for "qemu-img rebase" with compression
...

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

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iotests: add tests for "qemu-img rebase" with compression

The test cases considered so far:

314 (new test suite):

1. Check that compression mode isn't compatible with "-f raw" (raw
format doesn

iotests: add tests for "qemu-img rebase" with compression

The test cases considered so far:

314 (new test suite):

1. Check that compression mode isn't compatible with "-f raw" (raw
format doesn't support compression).
2. Check that rebasing an image onto no backing file preserves the data
and writes the copied clusters actually compressed.
3. Same as 2, but with a raw backing file (i.e. the clusters copied from the
backing are originally uncompressed -- we check they end up compressed
after being merged).
4. Remove a single delta from a backing chain, perform the same checks
as in 2.
5. Check that even when backing and overlay are initially uncompressed,
copied clusters end up compressed when rebase with compression is
performed.

271:

1. Check that when target image has subclusters, rebase with compression
will make an entire cluster containing the written subcluster
compressed.

Signed-off-by: Andrey Drobyshev <andrey.drobyshev@virtuozzo.com>
Reviewed-by: Hanna Czenczek <hreitz@redhat.com>
Message-ID: <20230919165804.439110-9-andrey.drobyshev@virtuozzo.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

show more ...