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/* SPDX-License-Identifier: MIT */
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#include <assert.h>
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#include <liburing.h>
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#include <netdb.h>
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#include <string.h>
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#include <sys/socket.h>
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#include <sys/types.h>
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#include <syscall.h>
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#include <unistd.h>
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#include <stdio.h>
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#include <errno.h>
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#include "liburing.h"
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#include "../src/syscall.h"
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struct io_uring io_uring;
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int sys_io_uring_enter(const int fd,
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const unsigned to_submit,
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const unsigned min_complete,
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const unsigned flags, sigset_t * const sig)
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{
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return __sys_io_uring_enter(fd, to_submit, min_complete, flags, sig);
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}
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int submit_sqe(void)
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{
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struct io_uring_sq *sq = &io_uring.sq;
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const unsigned tail = *sq->ktail;
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sq->array[tail & *sq->kring_mask] = 0;
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io_uring_smp_store_release(sq->ktail, tail + 1);
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return sys_io_uring_enter(io_uring.ring_fd, 1, 0, 0, NULL);
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}
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int main(int argc, char **argv)
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{
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struct addrinfo *addr_info_list = NULL;
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struct addrinfo *ai, *addr_info = NULL;
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struct io_uring_params params;
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struct io_uring_sqe *sqe;
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struct addrinfo hints;
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struct sockaddr sa;
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socklen_t sa_size = sizeof(sa);
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int ret, listen_fd, connect_fd, val, i;
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if (argc > 1)
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return 0;
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memset(¶ms, 0, sizeof(params));
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ret = io_uring_queue_init_params(1024, &io_uring, ¶ms);
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if (ret) {
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fprintf(stderr, "io_uring_init_failed: %d\n", ret);
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return 1;
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}
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if (!(params.features & IORING_FEAT_SUBMIT_STABLE)) {
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fprintf(stdout, "FEAT_SUBMIT_STABLE not there, skipping\n");
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return 0;
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}
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memset(&hints, 0, sizeof(hints));
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hints.ai_family = AF_UNSPEC;
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hints.ai_socktype = SOCK_STREAM;
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hints.ai_flags = AI_PASSIVE | AI_NUMERICSERV;
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ret = getaddrinfo(NULL, "12345", &hints, &addr_info_list);
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if (ret < 0) {
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perror("getaddrinfo");
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return 1;
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}
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for (ai = addr_info_list; ai; ai = ai->ai_next) {
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if (ai->ai_family == AF_INET || ai->ai_family == AF_INET6) {
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addr_info = ai;
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break;
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}
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}
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if (!addr_info) {
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fprintf(stderr, "addrinfo not found\n");
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return 1;
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}
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sqe = &io_uring.sq.sqes[0];
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listen_fd = -1;
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ret = socket(addr_info->ai_family, SOCK_STREAM,
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addr_info->ai_protocol);
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if (ret < 0) {
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perror("socket");
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return 1;
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}
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listen_fd = ret;
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val = 1;
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setsockopt(listen_fd, SOL_SOCKET, SO_REUSEADDR, &val, sizeof(int));
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setsockopt(listen_fd, SOL_SOCKET, SO_REUSEPORT, &val, sizeof(int));
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ret = bind(listen_fd, addr_info->ai_addr, addr_info->ai_addrlen);
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if (ret < 0) {
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perror("bind");
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return 1;
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}
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ret = listen(listen_fd, SOMAXCONN);
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if (ret < 0) {
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perror("listen");
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return 1;
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}
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memset(&sa, 0, sizeof(sa));
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io_uring_prep_accept(sqe, listen_fd, &sa, &sa_size, 0);
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sqe->user_data = 1;
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ret = submit_sqe();
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if (ret != 1) {
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fprintf(stderr, "submit failed: %d\n", ret);
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return 1;
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}
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connect_fd = -1;
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ret = socket(addr_info->ai_family, SOCK_STREAM, addr_info->ai_protocol);
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if (ret < 0) {
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perror("socket");
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return 1;
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}
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connect_fd = ret;
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io_uring_prep_connect(sqe, connect_fd, addr_info->ai_addr,
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addr_info->ai_addrlen);
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sqe->user_data = 2;
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ret = submit_sqe();
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if (ret != 1) {
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fprintf(stderr, "submit failed: %d\n", ret);
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return 1;
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}
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for (i = 0; i < 2; i++) {
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struct io_uring_cqe *cqe = NULL;
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ret = io_uring_wait_cqe(&io_uring, &cqe);
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if (ret) {
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fprintf(stderr, "io_uring_wait_cqe: %d\n", ret);
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return 1;
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}
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switch (cqe->user_data) {
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case 1:
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if (cqe->res < 0) {
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fprintf(stderr, "accept failed: %d\n", cqe->res);
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return 1;
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}
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break;
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case 2:
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if (cqe->res) {
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fprintf(stderr, "connect failed: %d\n", cqe->res);
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return 1;
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}
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break;
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}
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io_uring_cq_advance(&io_uring, 1);
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}
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freeaddrinfo(addr_info_list);
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io_uring_queue_exit(&io_uring);
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return 0;
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}
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