[PATCH v2 4/4] io_uring: move send/recv IOPOLL check into prep

From: Pavel Begunkov
Date: Wed Jun 03 2020 - 09:31:11 EST


Fail recv/send in case of IORING_SETUP_IOPOLL earlier during prep,
so it'd be done only once. Removes duplication as well

Signed-off-by: Pavel Begunkov <asml.silence@xxxxxxxxx>
---
fs/io_uring.c | 18 ++++++------------
1 file changed, 6 insertions(+), 12 deletions(-)

diff --git a/fs/io_uring.c b/fs/io_uring.c
index 7d49bcba859c..d63a13d10de0 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -3555,6 +3555,9 @@ static int io_sendmsg_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
struct io_async_ctx *io = req->io;
int ret;

+ if (unlikely(req->ctx->flags & IORING_SETUP_IOPOLL))
+ return -EINVAL;
+
sr->msg_flags = READ_ONCE(sqe->msg_flags);
sr->msg = u64_to_user_ptr(READ_ONCE(sqe->addr));
sr->len = READ_ONCE(sqe->len);
@@ -3584,9 +3587,6 @@ static int io_sendmsg(struct io_kiocb *req, bool force_nonblock)
struct socket *sock;
int ret;

- if (unlikely(req->ctx->flags & IORING_SETUP_IOPOLL))
- return -EINVAL;
-
sock = sock_from_file(req->file, &ret);
if (sock) {
struct io_async_ctx io;
@@ -3640,9 +3640,6 @@ static int io_send(struct io_kiocb *req, bool force_nonblock)
struct socket *sock;
int ret;

- if (unlikely(req->ctx->flags & IORING_SETUP_IOPOLL))
- return -EINVAL;
-
sock = sock_from_file(req->file, &ret);
if (sock) {
struct io_sr_msg *sr = &req->sr_msg;
@@ -3795,6 +3792,9 @@ static int io_recvmsg_prep(struct io_kiocb *req,
struct io_async_ctx *io = req->io;
int ret;

+ if (unlikely(req->ctx->flags & IORING_SETUP_IOPOLL))
+ return -EINVAL;
+
sr->msg_flags = READ_ONCE(sqe->msg_flags);
sr->msg = u64_to_user_ptr(READ_ONCE(sqe->addr));
sr->len = READ_ONCE(sqe->len);
@@ -3823,9 +3823,6 @@ static int io_recvmsg(struct io_kiocb *req, bool force_nonblock)
struct socket *sock;
int ret, cflags = 0;

- if (unlikely(req->ctx->flags & IORING_SETUP_IOPOLL))
- return -EINVAL;
-
sock = sock_from_file(req->file, &ret);
if (sock) {
struct io_buffer *kbuf;
@@ -3887,9 +3884,6 @@ static int io_recv(struct io_kiocb *req, bool force_nonblock)
struct socket *sock;
int ret, cflags = 0;

- if (unlikely(req->ctx->flags & IORING_SETUP_IOPOLL))
- return -EINVAL;
-
sock = sock_from_file(req->file, &ret);
if (sock) {
struct io_sr_msg *sr = &req->sr_msg;
--
2.24.0