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Diffstat (limited to 'io_uring/net.c')
-rw-r--r--io_uring/net.c79
1 files changed, 48 insertions, 31 deletions
diff --git a/io_uring/net.c b/io_uring/net.c
index 89e839013837..a8e303796f16 100644
--- a/io_uring/net.c
+++ b/io_uring/net.c
@@ -65,6 +65,7 @@ struct io_sr_msg {
u16 addr_len;
u16 buf_group;
void __user *addr;
+ void __user *msg_control;
/* used only for send zerocopy */
struct io_kiocb *notif;
};
@@ -195,11 +196,15 @@ static int io_sendmsg_copy_hdr(struct io_kiocb *req,
struct io_async_msghdr *iomsg)
{
struct io_sr_msg *sr = io_kiocb_to_cmd(req, struct io_sr_msg);
+ int ret;
iomsg->msg.msg_name = &iomsg->addr;
iomsg->free_iov = iomsg->fast_iov;
- return sendmsg_copy_msghdr(&iomsg->msg, sr->umsg, sr->msg_flags,
+ ret = sendmsg_copy_msghdr(&iomsg->msg, sr->umsg, sr->msg_flags,
&iomsg->free_iov);
+ /* save msg_control as sys_sendmsg() overwrites it */
+ sr->msg_control = iomsg->msg.msg_control_user;
+ return ret;
}
int io_send_prep_async(struct io_kiocb *req)
@@ -297,6 +302,7 @@ int io_sendmsg(struct io_kiocb *req, unsigned int issue_flags)
if (req_has_async_data(req)) {
kmsg = req->async_data;
+ kmsg->msg.msg_control_user = sr->msg_control;
} else {
ret = io_sendmsg_copy_hdr(req, &iomsg);
if (ret)
@@ -320,6 +326,8 @@ int io_sendmsg(struct io_kiocb *req, unsigned int issue_flags)
if (ret == -EAGAIN && (issue_flags & IO_URING_F_NONBLOCK))
return io_setup_async_msg(req, kmsg, issue_flags);
if (ret > 0 && io_net_retry(sock, flags)) {
+ kmsg->msg.msg_controllen = 0;
+ kmsg->msg.msg_control = NULL;
sr->done_io += ret;
req->flags |= REQ_F_PARTIAL_IO;
return io_setup_async_msg(req, kmsg, issue_flags);
@@ -616,9 +624,15 @@ static inline void io_recv_prep_retry(struct io_kiocb *req)
* again (for multishot).
*/
static inline bool io_recv_finish(struct io_kiocb *req, int *ret,
- unsigned int cflags, bool mshot_finished,
+ struct msghdr *msg, bool mshot_finished,
unsigned issue_flags)
{
+ unsigned int cflags;
+
+ cflags = io_put_kbuf(req, issue_flags);
+ if (msg->msg_inq && msg->msg_inq != -1U)
+ cflags |= IORING_CQE_F_SOCK_NONEMPTY;
+
if (!(req->flags & REQ_F_APOLL_MULTISHOT)) {
io_req_set_res(req, *ret, cflags);
*ret = IOU_OK;
@@ -626,10 +640,18 @@ static inline bool io_recv_finish(struct io_kiocb *req, int *ret,
}
if (!mshot_finished) {
- if (io_aux_cqe(req->ctx, issue_flags & IO_URING_F_COMPLETE_DEFER,
- req->cqe.user_data, *ret, cflags | IORING_CQE_F_MORE, true)) {
+ if (io_aux_cqe(req, issue_flags & IO_URING_F_COMPLETE_DEFER,
+ *ret, cflags | IORING_CQE_F_MORE, true)) {
io_recv_prep_retry(req);
- return false;
+ /* Known not-empty or unknown state, retry */
+ if (cflags & IORING_CQE_F_SOCK_NONEMPTY ||
+ msg->msg_inq == -1U)
+ return false;
+ if (issue_flags & IO_URING_F_MULTISHOT)
+ *ret = IOU_ISSUE_SKIP_COMPLETE;
+ else
+ *ret = -EAGAIN;
+ return true;
}
/* Otherwise stop multishot but use the current result. */
}
@@ -732,7 +754,6 @@ int io_recvmsg(struct io_kiocb *req, unsigned int issue_flags)
struct io_sr_msg *sr = io_kiocb_to_cmd(req, struct io_sr_msg);
struct io_async_msghdr iomsg, *kmsg;
struct socket *sock;
- unsigned int cflags;
unsigned flags;
int ret, min_ret = 0;
bool force_nonblock = issue_flags & IO_URING_F_NONBLOCK;
@@ -781,16 +802,20 @@ retry_multishot:
flags = sr->msg_flags;
if (force_nonblock)
flags |= MSG_DONTWAIT;
- if (flags & MSG_WAITALL)
- min_ret = iov_iter_count(&kmsg->msg.msg_iter);
kmsg->msg.msg_get_inq = 1;
- if (req->flags & REQ_F_APOLL_MULTISHOT)
+ kmsg->msg.msg_inq = -1U;
+ if (req->flags & REQ_F_APOLL_MULTISHOT) {
ret = io_recvmsg_multishot(sock, sr, kmsg, flags,
&mshot_finished);
- else
+ } else {
+ /* disable partial retry for recvmsg with cmsg attached */
+ if (flags & MSG_WAITALL && !kmsg->msg.msg_controllen)
+ min_ret = iov_iter_count(&kmsg->msg.msg_iter);
+
ret = __sys_recvmsg_sock(sock, &kmsg->msg, sr->umsg,
kmsg->uaddr, flags);
+ }
if (ret < min_ret) {
if (ret == -EAGAIN && force_nonblock) {
@@ -820,11 +845,7 @@ retry_multishot:
else
io_kbuf_recycle(req, issue_flags);
- cflags = io_put_kbuf(req, issue_flags);
- if (kmsg->msg.msg_inq)
- cflags |= IORING_CQE_F_SOCK_NONEMPTY;
-
- if (!io_recv_finish(req, &ret, cflags, mshot_finished, issue_flags))
+ if (!io_recv_finish(req, &ret, &kmsg->msg, mshot_finished, issue_flags))
goto retry_multishot;
if (mshot_finished) {
@@ -843,7 +864,6 @@ int io_recv(struct io_kiocb *req, unsigned int issue_flags)
struct io_sr_msg *sr = io_kiocb_to_cmd(req, struct io_sr_msg);
struct msghdr msg;
struct socket *sock;
- unsigned int cflags;
unsigned flags;
int ret, min_ret = 0;
bool force_nonblock = issue_flags & IO_URING_F_NONBLOCK;
@@ -860,6 +880,14 @@ int io_recv(struct io_kiocb *req, unsigned int issue_flags)
if (unlikely(!sock))
return -ENOTSOCK;
+ msg.msg_name = NULL;
+ msg.msg_namelen = 0;
+ msg.msg_control = NULL;
+ msg.msg_get_inq = 1;
+ msg.msg_controllen = 0;
+ msg.msg_iocb = NULL;
+ msg.msg_ubuf = NULL;
+
retry_multishot:
if (io_do_buffer_select(req)) {
void __user *buf;
@@ -874,14 +902,8 @@ retry_multishot:
if (unlikely(ret))
goto out_free;
- msg.msg_name = NULL;
- msg.msg_namelen = 0;
- msg.msg_control = NULL;
- msg.msg_get_inq = 1;
+ msg.msg_inq = -1U;
msg.msg_flags = 0;
- msg.msg_controllen = 0;
- msg.msg_iocb = NULL;
- msg.msg_ubuf = NULL;
flags = sr->msg_flags;
if (force_nonblock)
@@ -921,11 +943,7 @@ out_free:
else
io_kbuf_recycle(req, issue_flags);
- cflags = io_put_kbuf(req, issue_flags);
- if (msg.msg_inq)
- cflags |= IORING_CQE_F_SOCK_NONEMPTY;
-
- if (!io_recv_finish(req, &ret, cflags, ret <= 0, issue_flags))
+ if (!io_recv_finish(req, &ret, &msg, ret <= 0, issue_flags))
goto retry_multishot;
return ret;
@@ -1297,7 +1315,6 @@ int io_accept_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
int io_accept(struct io_kiocb *req, unsigned int issue_flags)
{
- struct io_ring_ctx *ctx = req->ctx;
struct io_accept *accept = io_kiocb_to_cmd(req, struct io_accept);
bool force_nonblock = issue_flags & IO_URING_F_NONBLOCK;
unsigned int file_flags = force_nonblock ? O_NONBLOCK : 0;
@@ -1347,8 +1364,8 @@ retry:
if (ret < 0)
return ret;
- if (io_aux_cqe(ctx, issue_flags & IO_URING_F_COMPLETE_DEFER,
- req->cqe.user_data, ret, IORING_CQE_F_MORE, true))
+ if (io_aux_cqe(req, issue_flags & IO_URING_F_COMPLETE_DEFER, ret,
+ IORING_CQE_F_MORE, true))
goto retry;
return -ECANCELED;
generated by cgit (git 2.34.1) at 2024-06-21 00:44:06 +0000