[Qemu-block] [PATCH v2 for-2.10 0/8] RBD reopen, read_only cleanup

[Jeff Cody]

Changes from v1:

Patch 2: Has v1 patch 8 (do not blindly xset bs->read_only) squashed into it
         (thanks Stefan)
         COW -> "copy-on-read" (Thanks John)
         Drop unneeded call in vvfat, and bypass enable_write_target (Stefan)

Patch 5: Rename bdrv_try_... to bdrv_can_set_read_only() (Thanks John, Stefan)

Patch 6: Use "reopen_state->flags" not "reopen_state->bs->open_flags"
         (Thanks John)



This series does two things:

1.) Cleans up some of the logic behind setting the read_only flag
    for a BDS in the block layer, so that it is done consistently
    (and rules are applied consistently), and

2.) Adds .bdrv_reopen_prepare() implementation for RBD, so that block
    jobs can be run on backing chains that have rbd protocol nodes.

Jeff Cody (8):
  block: add bdrv_set_read_only() helper function
  block: do not set BDS read_only if copy_on_read enabled
  block: honor BDRV_O_ALLOW_RDWR when clearing bs->read_only
  block: code movement
  block: introduce bdrv_can_set_read_only()
  block: use bdrv_can_set_read_only() during reopen
  block/rbd - update variable names to more apt names
  block/rbd: Add support for reopen()

 block.c               | 56 +++++++++++++++++++++++++++++++++++---------
 block/bochs.c         |  5 +++-
 block/cloop.c         |  5 +++-
 block/dmg.c           |  6 ++++-
 block/rbd.c           | 65 +++++++++++++++++++++++++++++++++++++--------------
 block/vvfat.c         | 19 +++++++++++----
 include/block/block.h |  2 ++
 7 files changed, 123 insertions(+), 35 deletions(-)

-- 
2.9.3