Re: [PATCH v8 6/7] block-stream: freeze link to base node during stream job

[Max Reitz]

On 28.08.20 18:52, Andrey Shinkevich wrote:
> To keep the base node unchanged during the block-stream operation,
> freeze it as the other part of the backing chain with the intermediate
> nodes related to the job.
> This patch revers the change made with the commit c624b015bf as the
> correct base file name and its format have to be written down to the
> QCOW2 header on the disk when the backing file is being changed after
> the stream job completes.
> This reversion incurs changes in the tests 030, 245 and discards the
> test 258 where concurrent stream/commit jobs are tested. When the link
> to a base node is frozen, the concurrent job cannot change the common
> backing chain.
> 
> Signed-off-by: Andrey Shinkevich <andrey.shinkevich@virtuozzo.com>
> ---
>  block/stream.c             |  29 ++------
>  tests/qemu-iotests/030     |  10 +--
>  tests/qemu-iotests/245     |   2 +-
>  tests/qemu-iotests/258     | 161 
> ---------------------------------------------
>  tests/qemu-iotests/258.out |  33 ----------
>  5 files changed, 14 insertions(+), 221 deletions(-)
>  delete mode 100755 tests/qemu-iotests/258
>  delete mode 100644 tests/qemu-iotests/258.out

Does this need to be in this series?  (I’m not entirely sure, based on
what I can see in patch 7.)

When doing this, should we introduce a @bottom-node option alongside, so
that we can make all the tests that are deleted here pass still, just
with changes?

Max

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