[PATCH v9 0/9] Apply COR-filter to the block-stream permanently

[Andrey Shinkevich via <qemu-devel@nongnu.org>]

Despite the patch "freeze link to base node..." has been removed from the
series in the current version 9, the iotest case test_stream_parallel does
not pass after the COR-filter is inserted into the backing chain. As the
test case may not be initialized, it does not make a sense and was removed
again.
The check with bdrv_is_allocated_above() takes place in the COR-filter and
in the block-stream job both. An optimization of the block-stream job based
on the filter functionality may be made in a separate series.

v9:
  02: Refactored.
  04: Base node name is used instead of the file name.
  05: New implementation based on Max' review.
  06: New.
  07: New. The patch "freeze link to base node..." was deleted.
  08: New.
  09: The filter node options are initialized.

The v8 Message-Id:
<1598633579-221780-1-git-send-email-andrey.shinkevich@virtuozzo.com>

Andrey Shinkevich (9):
  copy-on-read: Support preadv/pwritev_part functions
  copy-on-read: add filter append/drop functions
  qapi: add filter-node-name to block-stream
  copy-on-read: pass base node name to COR driver
  copy-on-read: limit guest COR activity to base in COR driver
  copy-on-read: skip non-guest reads if no copy needed
  stream: skip filters when writing backing file name to QCOW2 header
  block: remove unused parameter backing-file name
  block: apply COR-filter to block-stream jobs

 block/copy-on-read.c           | 165 ++++++++++++++++++++++++++++++++++++++---
 block/io.c                     |   2 +-
 block/monitor/block-hmp-cmds.c |   6 +-
 block/stream.c                 | 112 +++++++++++++++++-----------
 blockdev.c                     |  21 +-----
 include/block/block_int.h      |   9 ++-
 qapi/block-core.json           |  23 ++----
 tests/qemu-iotests/030         |  51 ++-----------
 tests/qemu-iotests/030.out     |   4 +-
 tests/qemu-iotests/141.out     |   2 +-
 tests/qemu-iotests/245         |  19 +++--
 11 files changed, 267 insertions(+), 147 deletions(-)

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1.8.3.1