diff options
| author | Ming Lei <ming.lei@redhat.com> | 2026-01-16 22:18:37 +0800 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2026-01-22 20:05:40 -0700 |
| commit | b256795b3606e9a67c725dde8eaae91dd9d21de4 (patch) | |
| tree | b9f1b02d2392fd847ce10afe2735286889f7b078 /include | |
| parent | e86f89ab24f5ec595879a01eebb5df84f5ed6d2b (diff) | |
ublk: handle UBLK_U_IO_PREP_IO_CMDS
This commit implements the handling of the UBLK_U_IO_PREP_IO_CMDS command,
which allows userspace to prepare a batch of I/O requests.
The core of this change is the `ublk_walk_cmd_buf` function, which iterates
over the elements in the uring_cmd fixed buffer. For each element, it parses
the I/O details, finds the corresponding `ublk_io` structure, and prepares it
for future dispatch.
Add per-io lock for protecting concurrent delivery and committing.
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 | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/uapi/linux/ublk_cmd.h b/include/uapi/linux/ublk_cmd.h index 0cc58e19d401..1a3d4d33c1d1 100644 --- a/include/uapi/linux/ublk_cmd.h +++ b/include/uapi/linux/ublk_cmd.h @@ -103,6 +103,11 @@ _IOWR('u', 0x23, struct ublksrv_io_cmd) #define UBLK_U_IO_UNREGISTER_IO_BUF \ _IOWR('u', 0x24, struct ublksrv_io_cmd) + +/* + * return 0 if the command is run successfully, otherwise failure code + * is returned + */ #define UBLK_U_IO_PREP_IO_CMDS \ _IOWR('u', 0x25, struct ublk_batch_io) #define UBLK_U_IO_COMMIT_IO_CMDS \ |