diff options
| author | Pavel Begunkov <asml.silence@gmail.com> | 2025-03-08 18:21:15 +0000 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2025-03-10 07:14:27 -0600 |
| commit | d291fb65202051e996cd983b29dce3e390421bc6 (patch) | |
| tree | b123bfa5630d496b8699cd4e499d7f2f8d67b9fb /io_uring/rw.c | |
| parent | 5027d02452c982bdc7b36205c66466ebd7e6ee17 (diff) | |
io_uring: introduce io_prep_reg_iovec()
iovecs that are turned into registered buffers are imported in a special
way with an offset, so that later we can do an in place translation. Add
a helper function taking care of it.
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/7de2ecb9ed5efc3c5cf320232236966da5ad4ccc.1741457480.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'io_uring/rw.c')
| -rw-r--r-- | io_uring/rw.c | 21 |
1 files changed, 1 insertions, 20 deletions
diff --git a/io_uring/rw.c b/io_uring/rw.c index 50037313555f..4861b876f48e 100644 --- a/io_uring/rw.c +++ b/io_uring/rw.c @@ -407,28 +407,9 @@ static int io_rw_prep_reg_vec(struct io_kiocb *req) struct io_rw *rw = io_kiocb_to_cmd(req, struct io_rw); struct io_async_rw *io = req->async_data; const struct iovec __user *uvec; - size_t uvec_segs = rw->len; - struct iovec *iov; - int iovec_off, ret; - void *res; - if (uvec_segs > io->vec.nr) { - ret = io_vec_realloc(&io->vec, uvec_segs); - if (ret) - return ret; - req->flags |= REQ_F_NEED_CLEANUP; - } - /* pad iovec to the right */ - iovec_off = io->vec.nr - uvec_segs; - iov = io->vec.iovec + iovec_off; uvec = u64_to_user_ptr(rw->addr); - res = iovec_from_user(uvec, uvec_segs, uvec_segs, iov, - io_is_compat(req->ctx)); - if (IS_ERR(res)) - return PTR_ERR(res); - - req->flags |= REQ_F_IMPORT_BUFFER; - return 0; + return io_prep_reg_iovec(req, &io->vec, uvec, rw->len); } int io_prep_readv_fixed(struct io_kiocb *req, const struct io_uring_sqe *sqe) |