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io_uring/net: support non-zerocopy sendto

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We have normal sends, but what is missing is sendto-like requests. Add
sendto() capabilities to IORING_OP_SEND by passing in addr just as we do
for IORING_OP_SEND_ZC.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/69fbd8b2cb830e57d1bf9ec351e9bf95c5b77e3f.1663668091.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Pavel Begunkov 2022-09-21 12:17:51 +01:00 committed by Jens Axboe
parent 6ae61b7aa2
commit 516e82f0e0
3 changed files with 35 additions and 8 deletions
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35
io_uring/net.c
View File

@ -59,9 +59,10 @@ struct io_sr_msg {
unsigned done_io;
unsigned msg_flags;
u16 flags;
/* used only for sendzc */
/* initialised and used only by !msg send variants */
u16 addr_len;
void __user *addr;
/* used only for send zerocopy */
struct io_kiocb *notif;
};
@ -180,7 +181,7 @@ static int io_sendmsg_copy_hdr(struct io_kiocb *req,
&iomsg->free_iov);
}
int io_sendzc_prep_async(struct io_kiocb *req)
int io_send_prep_async(struct io_kiocb *req)
{
struct io_sr_msg *zc = io_kiocb_to_cmd(req, struct io_sr_msg);
struct io_async_msghdr *io;
@ -234,8 +235,14 @@ int io_sendmsg_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
{
struct io_sr_msg *sr = io_kiocb_to_cmd(req, struct io_sr_msg);
if (unlikely(sqe->file_index || sqe->addr2))
if (req->opcode == IORING_OP_SEND) {
if (READ_ONCE(sqe->__pad3[0]))
return -EINVAL;
sr->addr = u64_to_user_ptr(READ_ONCE(sqe->addr2));
sr->addr_len = READ_ONCE(sqe->addr_len);
} else if (sqe->addr2 || sqe->file_index) {
return -EINVAL;
}
sr->umsg = u64_to_user_ptr(READ_ONCE(sqe->addr));
sr->len = READ_ONCE(sqe->len);
@ -315,6 +322,7 @@ int io_sendmsg(struct io_kiocb *req, unsigned int issue_flags)
int io_send(struct io_kiocb *req, unsigned int issue_flags)
{
struct sockaddr_storage __address;
struct io_sr_msg *sr = io_kiocb_to_cmd(req, struct io_sr_msg);
struct msghdr msg;
struct iovec iov;
@ -323,9 +331,23 @@ int io_send(struct io_kiocb *req, unsigned int issue_flags)
int min_ret = 0;
int ret;
if (sr->addr) {
if (req_has_async_data(req)) {
struct io_async_msghdr *io = req->async_data;
msg.msg_name = &io->addr;
} else {
ret = move_addr_to_kernel(sr->addr, sr->addr_len, &__address);
if (unlikely(ret < 0))
return ret;
msg.msg_name = (struct sockaddr *)&__address;
}
msg.msg_namelen = sr->addr_len;
}
if (!(req->flags & REQ_F_POLLED) &&
(sr->flags & IORING_RECVSEND_POLL_FIRST))
return -EAGAIN;
return io_setup_async_addr(req, &__address, issue_flags);
sock = sock_from_file(req->file);
if (unlikely(!sock))
@ -351,13 +373,14 @@ int io_send(struct io_kiocb *req, unsigned int issue_flags)
ret = sock_sendmsg(sock, &msg);
if (ret < min_ret) {
if (ret == -EAGAIN && (issue_flags & IO_URING_F_NONBLOCK))
return -EAGAIN;
return io_setup_async_addr(req, &__address, issue_flags);
if (ret > 0 && io_net_retry(sock, flags)) {
sr->len -= ret;
sr->buf += ret;
sr->done_io += ret;
req->flags |= REQ_F_PARTIAL_IO;
return -EAGAIN;
return io_setup_async_addr(req, &__address, issue_flags);
}
if (ret == -ERESTARTSYS)
ret = -EINTR;

3
io_uring/net.h
View File

@ -31,12 +31,13 @@ struct io_async_connect {
int io_shutdown_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe);
int io_shutdown(struct io_kiocb *req, unsigned int issue_flags);
int io_sendzc_prep_async(struct io_kiocb *req);
int io_sendmsg_prep_async(struct io_kiocb *req);
void io_sendmsg_recvmsg_cleanup(struct io_kiocb *req);
int io_sendmsg_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe);
int io_sendmsg(struct io_kiocb *req, unsigned int issue_flags);
int io_send(struct io_kiocb *req, unsigned int issue_flags);
int io_send_prep_async(struct io_kiocb *req);
int io_recvmsg_prep_async(struct io_kiocb *req);
int io_recvmsg_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe);

5
io_uring/opdef.c
View File

@ -316,11 +316,14 @@ const struct io_op_def io_op_defs[] = {
.pollout = 1,
.audit_skip = 1,
.ioprio = 1,
.manual_alloc = 1,
.name = "SEND",
#if defined(CONFIG_NET)
.async_size = sizeof(struct io_async_msghdr),
.prep = io_sendmsg_prep,
.issue = io_send,
.fail = io_sendrecv_fail,
.prep_async = io_send_prep_async,
#else
.prep = io_eopnotsupp_prep,
#endif
@ -495,7 +498,7 @@ const struct io_op_def io_op_defs[] = {
.async_size = sizeof(struct io_async_msghdr),
.prep = io_sendzc_prep,
.issue = io_sendzc,
.prep_async = io_sendzc_prep_async,
.prep_async = io_send_prep_async,
.cleanup = io_sendzc_cleanup,
.fail = io_send_zc_fail,
#else