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/* SPDX-License-Identifier: MIT */
/*
* Description: test waiting for more events than what will be posted with
* a timeout with DEFER_TASKRUN. All kernels should time out,
* but a non-buggy kernel will end up with one CQE available
* for reaping. Buggy kernels will not have processed the
* task_work and will have 0 events.
*
*/
#include <errno.h>
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <pthread.h>
#include "liburing.h"
#include "helpers.h"
struct d {
int fd;
};
static void *thread_fn(void *data)
{
struct d *d = data;
int ret;
usleep(100000);
ret = write(d->fd, "Hello", 5);
if (ret < 0)
perror("write");
return NULL;
}
static int test_poll(struct io_uring *ring)
{
struct io_uring_cqe *cqe;
struct io_uring_sqe *sqe;
struct __kernel_timespec ts;
int ret, fds[2], i;
pthread_t thread;
char buf[32];
struct d d;
void *tret;
if (pipe(fds) < 0) {
perror("pipe");
return 1;
}
d.fd = fds[1];
sqe = io_uring_get_sqe(ring);
io_uring_prep_read(sqe, fds[0], buf, sizeof(buf), 0);
pthread_create(&thread, NULL, thread_fn, &d);
ts.tv_sec = 1;
ts.tv_nsec = 0;
ret = io_uring_submit_and_wait_timeout(ring, &cqe, 2, &ts, NULL);
if (ret != 1) {
fprintf(stderr, "unexpected wait ret %d\n", ret);
return T_EXIT_FAIL;
}
for (i = 0; i < 2; i++) {
ret = io_uring_peek_cqe(ring, &cqe);
if (ret)
break;
io_uring_cqe_seen(ring, cqe);
}
if (i != 1) {
fprintf(stderr, "Got %d request, expected 1\n", i);
return T_EXIT_FAIL;
}
pthread_join(thread, &tret);
return T_EXIT_PASS;
}
static int test_file(struct io_uring *ring, char *__fname)
{
struct io_uring_cqe *cqe;
struct io_uring_sqe *sqe;
struct __kernel_timespec ts;
char filename[64], *fname;
int fd, ret, i;
void *buf;
if (!__fname) {
fname = filename;
sprintf(fname, ".defer-tw-timeout.%d", getpid());
t_create_file(fname, 128*1024);
} else {
fname = __fname;
}
fd = open(fname, O_RDONLY | O_DIRECT);
if (fd < 0) {
if (errno == EINVAL) {
if (!__fname)
unlink(fname);
return T_EXIT_SKIP;
}
perror("open");
if (!__fname)
unlink(fname);
return T_EXIT_FAIL;
}
if (!__fname)
unlink(fname);
if (posix_memalign(&buf, 4096, 4096)) {
close(fd);
return T_EXIT_FAIL;
}
sqe = io_uring_get_sqe(ring);
io_uring_prep_read(sqe, fd, buf, 4096, 0);
ts.tv_sec = 1;
ts.tv_nsec = 0;
ret = io_uring_submit_and_wait_timeout(ring, &cqe, 2, &ts, NULL);
if (ret != 1) {
fprintf(stderr, "unexpected wait ret %d\n", ret);
close(fd);
return T_EXIT_FAIL;
}
for (i = 0; i < 2; i++) {
ret = io_uring_peek_cqe(ring, &cqe);
if (ret)
break;
io_uring_cqe_seen(ring, cqe);
}
if (i != 1) {
fprintf(stderr, "Got %d request, expected 1\n", i);
close(fd);
return T_EXIT_FAIL;
}
close(fd);
return T_EXIT_PASS;
}
int main(int argc, char *argv[])
{
struct io_uring ring;
char *fname = NULL;
int ret;
ret = io_uring_queue_init(8, &ring, IORING_SETUP_SINGLE_ISSUER | IORING_SETUP_DEFER_TASKRUN);
if (ret == -EINVAL)
return T_EXIT_SKIP;
if (argc > 1)
fname = argv[1];
ret = test_file(&ring, fname);
if (ret != T_EXIT_PASS)
return ret;
ret = test_poll(&ring);
if (ret != T_EXIT_PASS)
return ret;
return T_EXIT_PASS;
}
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