There is an interest in having asynchronous block operations like discard. The patch set implements that as io_uring commands, which is an io_uring request type allowing to implement custom file specific operations. First 4 patches are simple preps, and the main part is in Patch 5. Not tested with a real drive yet, hence sending as an RFC. I'm also going to add BLKDISCARDZEROES and BLKSECDISCARD, which should reuse structures and helpers from Patch 5. liburing tests for reference: https://github.com/isilence/liburing.git discard-cmd-test Pavel Begunkov (5): io_uring/cmd: expose iowq to cmds io_uring/cmd: give inline space in request to cmds filemap: introduce filemap_invalidate_pages block: introduce blk_validate_discard() block: implement io_uring discard cmd block/blk.h | 1 + block/fops.c | 2 + block/ioctl.c | 139 ++++++++++++++++++++++++++++++----- include/linux/io_uring/cmd.h | 15 ++++ include/linux/pagemap.h | 2 + include/uapi/linux/fs.h | 2 + io_uring/io_uring.c | 11 +++ io_uring/io_uring.h | 1 + io_uring/uring_cmd.c | 7 ++ mm/filemap.c | 18 +++-- 10 files changed, 176 insertions(+), 22 deletions(-) -- 2.45.2
