Re: [PATCH RFC 0/8] blockdev-replace

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ping

02.08.2021 21:54, Vladimir Sementsov-Ogievskiy wrote:
Hi all!

As a continuation of "Qemu block filter insertion/removal API"
discussion, here is my proposal of blockdev-replace.

The realization allows:

- replace children of different parents: BDS, block devices, block
   exports

- automatically replace all parents of specific BDS, excluding creating
   loops (like bdrv_replace_node())

- do several replacements in one transaction

It's an untested draft, so you may go to patch 8, to look at QAPI
addition.

Vladimir Sementsov-Ogievskiy (8):
   block-backend: blk_root(): drop const specifier on return type
   block: add BlockParentClass class
   block: realize BlockParentClass for BlockDriverState
   block/export: realize BlockParentClass functionality
   qdev: improve find_device_state() to distinguish simple not found case
   qdev: realize BlockParentClass
   block: improve bdrv_replace_node_noperm()
   qapi: add blockdev-replace command

  qapi/block-core.json           |  78 ++++++++++++++++
  include/block/block-parent.h   |  32 +++++++
  include/sysemu/block-backend.h |   2 +-
  block.c                        | 158 ++++++++++++++++++++++++++++++++-
  block/block-backend.c          |   2 +-
  block/block-parent.c           |  66 ++++++++++++++
  block/export/export.c          |  44 +++++++++
  softmmu/qdev-monitor.c         |  90 +++++++++++++++----
  block/meson.build              |   1 +
  9 files changed, 453 insertions(+), 20 deletions(-)
  create mode 100644 include/block/block-parent.h
  create mode 100644 block/block-parent.c



--
Best regards,
Vladimir




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