diff options
| author | Ming Lei <ming.lei@redhat.com> | 2026-01-16 22:18:38 +0800 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2026-01-22 20:05:40 -0700 |
| commit | 1e500e106d5a82280db59dba06f0108085beba65 (patch) | |
| tree | bdf8e7c4f988955ba943dd20cb60d4e0a6526774 /include | |
| parent | b256795b3606e9a67c725dde8eaae91dd9d21de4 (diff) | |
ublk: handle UBLK_U_IO_COMMIT_IO_CMDS
Handle UBLK_U_IO_COMMIT_IO_CMDS by walking the uring_cmd fixed buffer:
- read each element into one temp buffer in batch style
- parse and apply each element for committing io result
Reviewed-by: Caleb Sander Mateos <csander@purestorage.com>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'include')
| -rw-r--r-- | include/uapi/linux/ublk_cmd.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/uapi/linux/ublk_cmd.h b/include/uapi/linux/ublk_cmd.h index 1a3d4d33c1d1..3894d676dd02 100644 --- a/include/uapi/linux/ublk_cmd.h +++ b/include/uapi/linux/ublk_cmd.h @@ -110,6 +110,14 @@ */ #define UBLK_U_IO_PREP_IO_CMDS \ _IOWR('u', 0x25, struct ublk_batch_io) +/* + * If failure code is returned, nothing in the command buffer is handled. + * Otherwise, the returned value means how many bytes in command buffer + * are handled actually, then number of handled IOs can be calculated with + * `elem_bytes` for each IO. IOs in the remained bytes are not committed, + * userspace has to check return value for dealing with partial committing + * correctly. + */ #define UBLK_U_IO_COMMIT_IO_CMDS \ _IOWR('u', 0x26, struct ublk_batch_io) |