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[Qemu-devel] [PATCH v2 for-2.7 0/8] blockdev: (Nearly) free clean-up wor

From: Max Reitz
Subject: [Qemu-devel] [PATCH v2 for-2.7 0/8] blockdev: (Nearly) free clean-up work
Date: Wed, 6 Apr 2016 19:57:06 +0200

After a lot has been restructed in the block layer in the past, we can
now reap at least one of the fruits: Make bdrv_open() return a BDS!

This series depends on the following series/patches:
- Revert "block: Forbid I/O throttling on nodes with multiple parents
  for 2.6"
  This is something I suppose Kevin will send when the 2.7 development
  window opens.
- "block: Move I/O throttling to BlockBackend" by Kevin
- "block: Remove BlockDriverState.blk" by Kevin

- Patch 1: bdrv_open_backing_file() has been changed already, so that
  part can be dropped from the patch
- Patch 2:
  - bdrv_append_temp_snapshot() now takes an additional argument
  - Drop a superfluous assignment to ret [Berto]
  - The function is now also static already, so we don't need to do that
- Patch 3: Added because this test has been added in the meantime
- Patch 4: Rebase conflicts
- Patch 6:
  - Rebase conflicts
  - A whole lot of places we no longer need to touch because they use
    blk_new_open() instead of bdrv_open()
- Patch 8: Added because patch 7 makes this possible.

git-backport-diff against v1:

[----] : patches are identical
[####] : number of functional differences between upstream/downstream patch
[down] : patch is downstream-only
The flags [FC] indicate (F)unctional and (C)ontextual differences, respectively

001/8:[down] 'block: Drop useless bdrv_new() call'
       ^^^^ Actually [0006] [FC] with a changed commit title
002/8:[0015] [FC] 'block: Let bdrv_open_inherit() return the snapshot'
003/8:[down] 'tests: Drop BDS from test-throttle.c'
004/8:[0019] [FC] 'block: Drop blk_new_with_bs()'
005/8:[----] [-C] 'block: Drop bdrv_new_root()'
006/8:[0135] [FC] 'block: Make bdrv_open() return a BDS'
007/8:[----] [-C] 'block: Assert !bs->refcnt in bdrv_close()'
008/8:[down] 'block: Drop bdrv_parent_cb_...() from bdrv_close()'

Max Reitz (8):
  block: Drop useless bdrv_new() call
  block: Let bdrv_open_inherit() return the snapshot
  tests: Drop BDS from test-throttle.c
  block: Drop blk_new_with_bs()
  block: Drop bdrv_new_root()
  block: Make bdrv_open() return a BDS
  block: Assert !bs->refcnt in bdrv_close()
  block: Drop bdrv_parent_cb_...() from bdrv_close()

 block.c               | 139 ++++++++++++++++++++------------------------------
 block/block-backend.c |  30 +++--------
 block/vvfat.c         |   8 +--
 blockdev.c            |  38 +++++---------
 include/block/block.h |   5 +-
 tests/test-throttle.c |   6 +--
 6 files changed, 83 insertions(+), 143 deletions(-)


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