[Devel] [PATCH VZ9 v3 0/5] blk-cbt improvements

[Andrey Zhadchenko]

Currently blk-cbt use UUID as a name. This is a big limitation.
We are going to expose bitmap names to libvirt, so we should
not expect users to follow this. Moreover, even VHI backup
utilities use non-UUID names sometimes. Technically QEMU
allows us bitmap names up to 1024 bytes, but 128 should be
fine.
Multiple simultaneous bitmaps are needed for backup plans,
so allow them.
Add new API to list bitmap names, adjust most of the API to
make operations on bitmap with user-provided name.

v2:
 - add "blk-cbt: introduce ABI versioning" patch
 - add "block/blk-cbt: add BLKCBTRENAME instead of BLKCBTSET flag"
patch
 - remove total_count from blk_user_cbt_list()
 - add cbt limit
 - various suggestions and small fixes for patch
"block/blk-cbt: allow multiple cbts in a single queue"

v3:
 - call all copy_from_user() before taking mutex_lock

Andrey Zhadchenko (5):
  block/blk-cbt: rework uuid field
  block/blk-cbt: allow multiple cbts in a single queue
  blk-cbt: introduce ABI versioning
  block/blk-cbt: add BLKCBTLIST ioctl
  block/blk-cbt: add BLKCBTRENAME instead of BLKCBTSET flag

 block/blk-cbt.c         | 288 +++++++++++++++++++++++++++-------------
 block/blk-core.c        |   2 +
 block/ioctl.c           |   2 +
 include/linux/blkdev.h  |   2 +-
 include/uapi/linux/fs.h |  24 +++-
 5 files changed, 218 insertions(+), 100 deletions(-)

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2.39.3