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(-) -- 2.39.3 _______________________________________________ Devel mailing list Devel@openvz.org https://lists.openvz.org/mailman/listinfo/devel
