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/* SPDX-License-Identifier: MIT */
/*
* Description: test io_uring poll cancel handling
*
*/
#include <errno.h>
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <inttypes.h>
#include <poll.h>
#include <sys/wait.h>
#include <signal.h>
#include "liburing.h"
struct poll_data {
unsigned is_poll;
unsigned is_cancel;
};
static void sig_alrm(int sig)
{
fprintf(stderr, "Timed out!\n");
exit(1);
}
static int test_poll_cancel(void)
{
struct io_uring ring;
int pipe1[2];
struct io_uring_cqe *cqe;
struct io_uring_sqe *sqe;
struct poll_data *pd, pds[2];
struct sigaction act;
int ret;
if (pipe(pipe1) != 0) {
perror("pipe");
return 1;
}
ret = io_uring_queue_init(2, &ring, 0);
if (ret) {
fprintf(stderr, "ring setup failed: %d\n", ret);
return 1;
}
memset(&act, 0, sizeof(act));
act.sa_handler = sig_alrm;
act.sa_flags = SA_RESTART;
sigaction(SIGALRM, &act, NULL);
alarm(1);
sqe = io_uring_get_sqe(&ring);
if (!sqe) {
fprintf(stderr, "get sqe failed\n");
return 1;
}
io_uring_prep_poll_add(sqe, pipe1[0], POLLIN);
pds[0].is_poll = 1;
pds[0].is_cancel = 0;
io_uring_sqe_set_data(sqe, &pds[0]);
ret = io_uring_submit(&ring);
if (ret <= 0) {
fprintf(stderr, "sqe submit failed\n");
return 1;
}
sqe = io_uring_get_sqe(&ring);
if (!sqe) {
fprintf(stderr, "get sqe failed\n");
return 1;
}
pds[1].is_poll = 0;
pds[1].is_cancel = 1;
io_uring_prep_poll_remove(sqe, (__u64)(uintptr_t)&pds[0]);
io_uring_sqe_set_data(sqe, &pds[1]);
ret = io_uring_submit(&ring);
if (ret <= 0) {
fprintf(stderr, "sqe submit failed: %d\n", ret);
return 1;
}
ret = io_uring_wait_cqe(&ring, &cqe);
if (ret < 0) {
fprintf(stderr, "wait cqe failed: %d\n", ret);
return 1;
}
pd = io_uring_cqe_get_data(cqe);
if (pd->is_poll && cqe->res != -ECANCELED) {
fprintf(stderr ,"sqe (add=%d/remove=%d) failed with %ld\n",
pd->is_poll, pd->is_cancel,
(long) cqe->res);
return 1;
} else if (pd->is_cancel && cqe->res) {
fprintf(stderr, "sqe (add=%d/remove=%d) failed with %ld\n",
pd->is_poll, pd->is_cancel,
(long) cqe->res);
return 1;
}
io_uring_cqe_seen(&ring, cqe);
ret = io_uring_wait_cqe(&ring, &cqe);
if (ret < 0) {
fprintf(stderr, "wait_cqe: %d\n", ret);
return 1;
}
pd = io_uring_cqe_get_data(cqe);
if (pd->is_poll && cqe->res != -ECANCELED) {
fprintf(stderr, "sqe (add=%d/remove=%d) failed with %ld\n",
pd->is_poll, pd->is_cancel,
(long) cqe->res);
return 1;
} else if (pd->is_cancel && cqe->res) {
fprintf(stderr, "sqe (add=%d/remove=%d) failed with %ld\n",
pd->is_poll, pd->is_cancel,
(long) cqe->res);
return 1;
}
close(pipe1[0]);
close(pipe1[1]);
io_uring_cqe_seen(&ring, cqe);
io_uring_queue_exit(&ring);
return 0;
}
static int __test_poll_cancel_with_timeouts(void)
{
struct __kernel_timespec ts = { .tv_sec = 10, };
struct io_uring ring, ring2;
struct io_uring_sqe *sqe;
int ret, off_nr = 1000;
ret = io_uring_queue_init(8, &ring, 0);
if (ret) {
fprintf(stderr, "ring setup failed: %d\n", ret);
return 1;
}
ret = io_uring_queue_init(1, &ring2, 0);
if (ret) {
fprintf(stderr, "ring setup failed: %d\n", ret);
return 1;
}
/* test timeout-offset triggering path during cancellation */
sqe = io_uring_get_sqe(&ring);
io_uring_prep_timeout(sqe, &ts, off_nr, 0);
/* poll ring2 to trigger cancellation on exit() */
sqe = io_uring_get_sqe(&ring);
io_uring_prep_poll_add(sqe, ring2.ring_fd, POLLIN);
sqe->flags |= IOSQE_IO_LINK;
sqe = io_uring_get_sqe(&ring);
io_uring_prep_link_timeout(sqe, &ts, 0);
ret = io_uring_submit(&ring);
if (ret != 3) {
fprintf(stderr, "sqe submit failed\n");
return 1;
}
/* just drop all rings/etc. intact, exit() will clean them up */
return 0;
}
static int test_poll_cancel_with_timeouts(void)
{
int ret;
pid_t p;
p = fork();
if (p == -1) {
fprintf(stderr, "fork() failed\n");
return 1;
}
if (p == 0) {
ret = __test_poll_cancel_with_timeouts();
exit(ret);
} else {
int wstatus;
if (waitpid(p, &wstatus, 0) == (pid_t)-1) {
perror("waitpid()");
return 1;
}
if (!WIFEXITED(wstatus) || WEXITSTATUS(wstatus)) {
fprintf(stderr, "child failed %i\n", WEXITSTATUS(wstatus));
return 1;
}
}
return 0;
}
int main(int argc, char *argv[])
{
int ret;
if (argc > 1)
return 0;
ret = test_poll_cancel();
if (ret) {
fprintf(stderr, "test_poll_cancel failed\n");
return -1;
}
ret = test_poll_cancel_with_timeouts();
if (ret) {
fprintf(stderr, "test_poll_cancel_with_timeouts failed\n");
return -1;
}
return 0;
}
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