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#include "../config-host.h"
/* SPDX-License-Identifier: MIT */
/*
* Check that kernels that support it will return IORING_CQE_F_SOCK_NONEMPTY
* on accepts requests where more connections are pending.
*/
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <assert.h>
#include <errno.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <sys/un.h>
#include <netinet/tcp.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <pthread.h>
#include "liburing.h"
#include "helpers.h"
static int no_more_accept;
#define MAX_ACCEPTS 8
struct data {
pthread_t thread;
pthread_barrier_t barrier;
pthread_barrier_t conn_barrier;
int connects;
};
static int start_accept_listen(int port_off, int extra_flags)
{
struct sockaddr_in addr;
int32_t val = 1;
int fd, ret;
fd = socket(AF_INET, SOCK_STREAM | extra_flags, IPPROTO_TCP);
ret = setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, &val, sizeof(val));
assert(ret != -1);
ret = setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &val, sizeof(val));
assert(ret != -1);
addr.sin_family = AF_INET;
addr.sin_port = htons(0x1235 + port_off);
addr.sin_addr.s_addr = inet_addr("127.0.0.1");
ret = bind(fd, (struct sockaddr *) &addr, sizeof(addr));
assert(ret != -1);
ret = listen(fd, 20000);
assert(ret != -1);
return fd;
}
static void *connect_fn(void *data)
{
struct sockaddr_in addr = { };
struct data *d = data;
int i;
pthread_barrier_wait(&d->barrier);
addr.sin_family = AF_INET;
addr.sin_port = htons(0x1235);
addr.sin_addr.s_addr = inet_addr("127.0.0.1");
for (i = 0; i < d->connects; i++) {
int s;
s = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (s < 0) {
perror("socket");
break;
}
if (connect(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
perror("connect");
break;
}
}
if (i)
pthread_barrier_wait(&d->conn_barrier);
return NULL;
}
static void setup_thread(struct data *d, int nconns)
{
d->connects = nconns;
pthread_barrier_init(&d->barrier, NULL, 2);
pthread_barrier_init(&d->conn_barrier, NULL, 2);
pthread_create(&d->thread, NULL, connect_fn, d);
}
static int test_maccept(struct data *d, int flags, int fixed)
{
struct io_uring_params p = { };
struct io_uring ring;
struct io_uring_cqe *cqe;
struct io_uring_sqe *sqe;
int err = 0, fd, ret, i, *fds;
p.flags = flags;
ret = io_uring_queue_init_params(8, &ring, &p);
if (ret == -EINVAL) {
return T_EXIT_SKIP;
} else if (ret < 0) {
fprintf(stderr, "ring setup failure: %d\n", ret);
return T_EXIT_FAIL;
}
if (!(p.features & IORING_FEAT_RECVSEND_BUNDLE)) {
no_more_accept = 1;
return 0;
}
setup_thread(d, MAX_ACCEPTS);
fds = malloc(MAX_ACCEPTS * sizeof(int));
memset(fds, -1, MAX_ACCEPTS * sizeof(int));
if (fixed) {
io_uring_register_ring_fd(&ring);
ret = io_uring_register_files(&ring, fds, MAX_ACCEPTS);
if (ret) {
fprintf(stderr, "file reg %d\n", ret);
return -1;
}
}
fd = start_accept_listen(0, 0);
pthread_barrier_wait(&d->barrier);
if (d->connects > 1)
pthread_barrier_wait(&d->conn_barrier);
for (i = 0; i < d->connects; i++) {
sqe = io_uring_get_sqe(&ring);
if (fixed)
io_uring_prep_accept_direct(sqe, fd, NULL, NULL, 0, i);
else
io_uring_prep_accept(sqe, fd, NULL, NULL, 0);
ret = io_uring_submit_and_wait(&ring, 1);
assert(ret != -1);
ret = io_uring_wait_cqe(&ring, &cqe);
assert(!ret);
if (cqe->res < 0) {
fprintf(stderr, "res=%d\n", cqe->res);
break;
}
fds[i] = cqe->res;
if (d->connects == 1) {
if (cqe->flags & IORING_CQE_F_SOCK_NONEMPTY) {
fprintf(stderr, "Non-empty sock on single?\n");
err = 1;
break;
}
} else {
int last = i + 1 == d->connects;
if (last && cqe->flags & IORING_CQE_F_SOCK_NONEMPTY) {
fprintf(stderr, "Non-empty sock on last?\n");
err = 1;
break;
} else if (!last && !(cqe->flags & IORING_CQE_F_SOCK_NONEMPTY)) {
fprintf(stderr, "Empty on multi connect?\n");
err = 1;
break;
}
}
io_uring_cqe_seen(&ring, cqe);
}
close(fd);
if (!fixed) {
for (i = 0; i < MAX_ACCEPTS; i++)
if (fds[i] != -1)
close(fds[i]);
}
free(fds);
io_uring_queue_exit(&ring);
return err;
}
static int test(int flags, int fixed)
{
struct data d;
void *tret;
int ret;
ret = test_maccept(&d, flags, fixed);
if (ret) {
fprintf(stderr, "test conns=1 failed\n");
return ret;
}
if (no_more_accept)
return T_EXIT_SKIP;
pthread_join(d.thread, &tret);
ret = test_maccept(&d, flags, fixed);
if (ret) {
fprintf(stderr, "test conns=MAX failed\n");
return ret;
}
pthread_join(d.thread, &tret);
return 0;
}
int main(int argc, char *argv[])
{
int ret;
if (argc > 1)
return T_EXIT_SKIP;
ret = test(0, 0);
if (no_more_accept)
return T_EXIT_SKIP;
if (ret) {
fprintf(stderr, "test 0 0 failed\n");
return ret;
}
ret = test(IORING_SETUP_SINGLE_ISSUER|IORING_SETUP_DEFER_TASKRUN, 0);
if (ret) {
fprintf(stderr, "test DEFER 0 failed\n");
return ret;
}
ret = test(0, 1);
if (ret) {
fprintf(stderr, "test 0 1 failed\n");
return ret;
}
ret = test(IORING_SETUP_SINGLE_ISSUER|IORING_SETUP_DEFER_TASKRUN, 1);
if (ret) {
fprintf(stderr, "test DEFER 1 failed\n");
return ret;
}
return 0;
}
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