[RFC PATCH v2 0/4] Allow changing bs->file on reopen

[Alberto Garcia <berto@igalia.com>]

Hi,

this series allows changing bs->file using x-blockdev-reopen. Read
here for more details:

   https://lists.gnu.org/archive/html/qemu-block/2021-01/msg00437.html

Version 2 of the series introduces a very significant change:
x-blockdev-reopen now receives a list of BlockdevOptions instead of
just one, so it is possible to reopen multiple block devices using a
single transaction.

This is still an RFC, I haven't updated the documentation and the
structure of the patches will probably change in the future, but I'd
like to know your opinion about the approach.

These patches apply on top of Vladimir's branch:

git: https://src.openvz.org/scm/~vsementsov/qemu.git
tag: up-block-topologic-perm-v2

Regards,

Berto

Alberto Garcia (4):
  block: Allow changing bs->file on reopen
  iotests: Update 245 to support replacing files with x-blockdev-reopen
  block: Support multiple reopening with x-blockdev-reopen
  iotests: Test reopening multiple devices at the same time

 qapi/block-core.json       |   2 +-
 include/block/block.h      |   2 +
 block.c                    |  81 +++++++++++++++++++++--
 blockdev.c                 |  85 +++++++++++++-----------
 tests/qemu-iotests/155     |   9 ++-
 tests/qemu-iotests/165     |   4 +-
 tests/qemu-iotests/245     | 128 ++++++++++++++++++++++++++++++++-----
 tests/qemu-iotests/245.out |   4 +-
 tests/qemu-iotests/248     |   2 +-
 tests/qemu-iotests/248.out |   2 +-
 tests/qemu-iotests/298     |   4 +-
 11 files changed, 254 insertions(+), 69 deletions(-)

-- 
2.20.1