io_uring: move shutdown under the general net section

Gets rid of some ifdefs and enables use of the net defines for when
CONFIG_NET isn't set.
Signed-off-by: Jens Axboe <axboe@kernel.dk>

fs/io_uring.c

@@ -5113,42 +5113,6 @@ static int io_uring_cmd(struct io_kiocb *req, unsigned int issue_flags)
 	return 0;
 }
 
-static int io_shutdown_prep(struct io_kiocb *req,
-			    const struct io_uring_sqe *sqe)
-{
-#if defined(CONFIG_NET)
-	if (unlikely(sqe->off || sqe->addr || sqe->rw_flags ||
-		     sqe->buf_index || sqe->splice_fd_in))
-		return -EINVAL;
-
-	req->shutdown.how = READ_ONCE(sqe->len);
-	return 0;
-#else
-	return -EOPNOTSUPP;
-#endif
-}
-
-static int io_shutdown(struct io_kiocb *req, unsigned int issue_flags)
-{
-#if defined(CONFIG_NET)
-	struct socket *sock;
-	int ret;
-
-	if (issue_flags & IO_URING_F_NONBLOCK)
-		return -EAGAIN;
-
-	sock = sock_from_file(req->file);
-	if (unlikely(!sock))
-		return -ENOTSOCK;
-
-	ret = __sys_shutdown_sock(sock, req->shutdown.how);
-	io_req_complete(req, ret);
-	return 0;
-#else
-	return -EOPNOTSUPP;
-#endif
-}
-
 static int __io_splice_prep(struct io_kiocb *req,
 			    const struct io_uring_sqe *sqe)
 {
@@ -6073,6 +6037,34 @@ static int io_sync_file_range(struct io_kiocb *req, unsigned int issue_flags)
 }
 
 #if defined(CONFIG_NET)
+static int io_shutdown_prep(struct io_kiocb *req,
+			    const struct io_uring_sqe *sqe)
+{
+	if (unlikely(sqe->off || sqe->addr || sqe->rw_flags ||
+		     sqe->buf_index || sqe->splice_fd_in))
+		return -EINVAL;
+
+	req->shutdown.how = READ_ONCE(sqe->len);
+	return 0;
+}
+
+static int io_shutdown(struct io_kiocb *req, unsigned int issue_flags)
+{
+	struct socket *sock;
+	int ret;
+
+	if (issue_flags & IO_URING_F_NONBLOCK)
+		return -EAGAIN;
+
+	sock = sock_from_file(req->file);
+	if (unlikely(!sock))
+		return -ENOTSOCK;
+
+	ret = __sys_shutdown_sock(sock, req->shutdown.how);
+	io_req_complete(req, ret);
+	return 0;
+}
+
 static bool io_net_retry(struct socket *sock, int flags)
 {
 	if (!(flags & MSG_WAITALL))
@@ -6777,6 +6769,7 @@ IO_NETOP_PREP_ASYNC(recvmsg);
 IO_NETOP_PREP_ASYNC(connect);
 IO_NETOP_PREP(accept);
 IO_NETOP_PREP(socket);
+IO_NETOP_PREP(shutdown);
 IO_NETOP_FN(send);
 IO_NETOP_FN(recv);
 #endif /* CONFIG_NET */