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#include "../config-host.h"
/* SPDX-License-Identifier: MIT */
/*
* Description: test that sigfd reading/polling works. A regression test for
* the upstream commit:
*
* fd7d6de22414 ("io_uring: don't recurse on tsk->sighand->siglock with signalfd")
*/
#include <unistd.h>
#include <sys/signalfd.h>
#include <sys/epoll.h>
#include <poll.h>
#include <stdio.h>
#include "liburing.h"
#include "helpers.h"
static int setup_signal(void)
{
sigset_t mask;
int sfd;
sigemptyset(&mask);
sigaddset(&mask, SIGINT);
sigprocmask(SIG_BLOCK, &mask, NULL);
sfd = signalfd(-1, &mask, SFD_NONBLOCK);
if (sfd < 0)
perror("signalfd");
return sfd;
}
static int test_uring(int sfd)
{
struct io_uring_sqe *sqe;
struct io_uring_cqe *cqe;
struct io_uring ring;
int ret;
ret = io_uring_queue_init(32, &ring, 0);
if (ret)
return T_EXIT_FAIL;
sqe = io_uring_get_sqe(&ring);
io_uring_prep_poll_add(sqe, sfd, POLLIN);
ret = io_uring_submit(&ring);
if (ret < 0) {
ret = T_EXIT_FAIL;
goto err_exit;
}
kill(getpid(), SIGINT);
io_uring_wait_cqe(&ring, &cqe);
if (cqe->res == -EOPNOTSUPP) {
fprintf(stderr, "signalfd poll not supported\n");
ret = T_EXIT_SKIP;
} else if (cqe->res < 0) {
fprintf(stderr, "poll failed: %d\n", cqe->res);
ret = T_EXIT_FAIL;
} else if (cqe->res & POLLIN) {
ret = T_EXIT_PASS;
} else {
fprintf(stderr, "Unexpected poll mask %x\n", cqe->res);
ret = T_EXIT_FAIL;
}
io_uring_cqe_seen(&ring, cqe);
err_exit:
io_uring_queue_exit(&ring);
return ret;
}
int main(int argc, char *argv[])
{
int sfd, ret;
if (argc > 1)
return T_EXIT_PASS;
sfd = setup_signal();
if (sfd < 0)
return T_EXIT_FAIL;
ret = test_uring(sfd);
if (ret == T_EXIT_FAIL)
fprintf(stderr, "test_uring signalfd failed\n");
close(sfd);
return ret;
}
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