diff options
| author | Pavel Begunkov <asml.silence@gmail.com> | 2025-03-21 18:04:34 +0000 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2025-03-21 12:52:15 -0600 |
| commit | ef490275297267d9461733ecd9b02bd3b798b3a4 (patch) | |
| tree | 54e3a1198604643f01f7300bccfa0134cd588cae /io_uring | |
| parent | 3a4689ac109f18f23ea0d0c1c79e055142796858 (diff) | |
io_uring/cmd: introduce io_uring_cmd_import_fixed_vec
io_uring_cmd_import_fixed_vec() is a cmd helper around vectored
registered buffer import functions, which caches the memory under
the hood. The lifetime of the vectore and hence the iterator is bound to
the request. Furthermore, the user is not allowed to call it multiple
times for a single request.
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/97487a80dec3fb8cf8aeedf1f9026ef6d503fe4b.1742579999.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'io_uring')
| -rw-r--r-- | io_uring/uring_cmd.c | 19 | ||||
| -rw-r--r-- | io_uring/uring_cmd.h | 6 |
2 files changed, 25 insertions, 0 deletions
diff --git a/io_uring/uring_cmd.c b/io_uring/uring_cmd.c index 6a21cdaaf495..f2cfc371f3d0 100644 --- a/io_uring/uring_cmd.c +++ b/io_uring/uring_cmd.c @@ -277,6 +277,25 @@ int io_uring_cmd_import_fixed(u64 ubuf, unsigned long len, int rw, } EXPORT_SYMBOL_GPL(io_uring_cmd_import_fixed); +int io_uring_cmd_import_fixed_vec(struct io_uring_cmd *ioucmd, + const struct iovec __user *uvec, + size_t uvec_segs, + int ddir, struct iov_iter *iter, + unsigned issue_flags) +{ + struct io_kiocb *req = cmd_to_io_kiocb(ioucmd); + struct io_async_cmd *ac = req->async_data; + int ret; + + ret = io_prep_reg_iovec(req, &ac->vec, uvec, uvec_segs); + if (ret) + return ret; + + return io_import_reg_vec(ddir, iter, req, &ac->vec, uvec_segs, + issue_flags); +} +EXPORT_SYMBOL_GPL(io_uring_cmd_import_fixed_vec); + void io_uring_cmd_issue_blocking(struct io_uring_cmd *ioucmd) { struct io_kiocb *req = cmd_to_io_kiocb(ioucmd); diff --git a/io_uring/uring_cmd.h b/io_uring/uring_cmd.h index b45ec7cffcd1..14e525255854 100644 --- a/io_uring/uring_cmd.h +++ b/io_uring/uring_cmd.h @@ -16,3 +16,9 @@ bool io_uring_try_cancel_uring_cmd(struct io_ring_ctx *ctx, struct io_uring_task *tctx, bool cancel_all); void io_cmd_cache_free(const void *entry); + +int io_uring_cmd_import_fixed_vec(struct io_uring_cmd *ioucmd, + const struct iovec __user *uvec, + size_t uvec_segs, + int ddir, struct iov_iter *iter, + unsigned issue_flags); |