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| author | Keith Busch <kbusch@kernel.org> | 2025-02-27 14:39:15 -0800 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2025-02-28 07:05:41 -0700 |
| commit | 1f6540e2aabb7372e68223a3669019589c3e30ad (patch) | |
| tree | 3b789fbfe6ed5ca4051496a314a945e6e51e9d3e /include/uapi | |
| parent | io_uring: add support for kernel registered bvecs (diff) | |
| download | linux-1f6540e2aabb7372e68223a3669019589c3e30ad.tar.gz linux-1f6540e2aabb7372e68223a3669019589c3e30ad.zip | |
ublk: zc register/unregister bvec
Provide new operations for the user to request mapping an active request
to an io uring instance's buf_table. The user has to provide the index
it wants to install the buffer.
A reference count is taken on the request to ensure it can't be
completed while it is active in a ring's buf_table.
Signed-off-by: Keith Busch <kbusch@kernel.org>
Link: https://lore.kernel.org/r/20250227223916.143006-6-kbusch@meta.com
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'include/uapi')
| -rw-r--r-- | include/uapi/linux/ublk_cmd.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/uapi/linux/ublk_cmd.h b/include/uapi/linux/ublk_cmd.h index a8bc98bb69fc..74246c926b55 100644 --- a/include/uapi/linux/ublk_cmd.h +++ b/include/uapi/linux/ublk_cmd.h @@ -94,6 +94,10 @@ _IOWR('u', UBLK_IO_COMMIT_AND_FETCH_REQ, struct ublksrv_io_cmd) #define UBLK_U_IO_NEED_GET_DATA \ _IOWR('u', UBLK_IO_NEED_GET_DATA, struct ublksrv_io_cmd) +#define UBLK_U_IO_REGISTER_IO_BUF \ + _IOWR('u', 0x23, struct ublksrv_io_cmd) +#define UBLK_U_IO_UNREGISTER_IO_BUF \ + _IOWR('u', 0x24, struct ublksrv_io_cmd) /* only ABORT means that no re-fetch */ #define UBLK_IO_RES_OK 0 |