Merge tag 'pull-block-2022-06-14-v2' of https://gitlab.com/vsementsov/qemu into staging

Block jobs & NBD patches

v2: - add arguments to QEMUMachine constructor in test, to make it work
      on arm in gitlab pipeline
    - use bdrv_inc_in_flight() / bdrv_dec_in_flight() instead of direct
      manipulation with bs->in_flight

- add new options for copy-before-write filter
- new trace points for NBD
- prefer unsigned type for some 'in_flight' fields

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# gpg:                 aka "Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>" [unknown]
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* tag 'pull-block-2022-06-14-v2' of https://gitlab.com/vsementsov/qemu:
  block: use 'unsigned' for in_flight field on driver state
  nbd: trace long NBD operations
  iotests: copy-before-write: add cases for cbw-timeout option
  block/copy-before-write: implement cbw-timeout option
  block/block-copy: block_copy(): add timeout_ns parameter
  util: add qemu-co-timeout
  iotests: add copy-before-write: on-cbw-error tests
  block/copy-before-write: add on-cbw-error open parameter
  block/copy-before-write: refactor option parsing

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>