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

[Pavel Begunkov]

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.sile...@gmail.com>
---
 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