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/* SPDX-License-Identifier: MIT */
/*
* Description: Check that trying to read two eventfd events will still
* return one when generated. There was a kernel commit that
* all of a sudden pretended that anonymous inodes were
* regular files, which broke the io_uring short read/write
* handling logic. See:
*
* https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=cfd86ef7e8e7
*/
#include <errno.h>
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <sys/timerfd.h>
#include "liburing.h"
#include "helpers.h"
static void sig_alrm(int sig)
{
fprintf(stderr, "Test failed due to timeout\n");
exit(T_EXIT_FAIL);
}
int main(int argc, char *argv[])
{
struct io_uring_params p = {};
struct sigaction act = { };
struct io_uring_sqe *sqe;
struct io_uring_cqe *cqe;
struct io_uring ring;
struct itimerspec is = { };
unsigned long tmp[2];
int ret, fd;
if (argc > 1)
return T_EXIT_SKIP;
ret = io_uring_queue_init_params(8, &ring, &p);
if (ret) {
fprintf(stderr, "ring setup failed: %d\n", ret);
return T_EXIT_FAIL;
}
fd = timerfd_create(CLOCK_MONOTONIC, TFD_CLOEXEC);
if (fd < 0) {
perror("timerfd_create");
return T_EXIT_FAIL;
}
sqe = io_uring_get_sqe(&ring);
io_uring_prep_read(sqe, fd, tmp, sizeof(tmp), 0);
sqe->user_data = 1;
io_uring_submit(&ring);
is.it_value.tv_sec = 0;
is.it_value.tv_nsec = 10000000;
ret = timerfd_settime(fd, 0, &is, NULL);
if (ret < 0) {
perror("timerfd_settime");
return T_EXIT_FAIL;
}
act.sa_handler = sig_alrm;
sigaction(SIGALRM, &act, NULL);
alarm(1);
ret = io_uring_wait_cqe(&ring, &cqe);
if (ret) {
fprintf(stderr, "wait: %d\n", ret);
return T_EXIT_FAIL;
}
close(fd);
io_uring_cqe_seen(&ring, cqe);
return T_EXIT_PASS;
}
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