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/* SPDX-License-Identifier: MIT */
/*
* Description: test disable/enable notifications through eventfd
*
*/
#include <errno.h>
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <poll.h>
#include <sys/eventfd.h>
#include "liburing.h"
#include "helpers.h"
static int test(bool defer)
{
struct io_uring_params p = {};
struct io_uring_sqe *sqe;
struct io_uring_cqe *cqe;
struct io_uring ring;
uint64_t ptr;
struct iovec vec = {
.iov_base = &ptr,
.iov_len = sizeof(ptr)
};
int ret, evfd, i;
if (defer)
p.flags |= IORING_SETUP_SINGLE_ISSUER |
IORING_SETUP_DEFER_TASKRUN;
ret = io_uring_queue_init_params(64, &ring, &p);
if (ret) {
fprintf(stderr, "ring setup failed: %d\n", ret);
return T_EXIT_FAIL;
}
evfd = eventfd(0, EFD_CLOEXEC);
if (evfd < 0) {
perror("eventfd");
return T_EXIT_FAIL;
}
ret = io_uring_register_eventfd(&ring, evfd);
if (ret) {
fprintf(stderr, "failed to register evfd: %d\n", ret);
return T_EXIT_FAIL;
}
if (!io_uring_cq_eventfd_enabled(&ring)) {
fprintf(stderr, "eventfd disabled\n");
return T_EXIT_FAIL;
}
ret = io_uring_cq_eventfd_toggle(&ring, false);
if (ret) {
fprintf(stdout, "Skipping, CQ flags not available!\n");
return T_EXIT_SKIP;
}
sqe = io_uring_get_sqe(&ring);
io_uring_prep_readv(sqe, evfd, &vec, 1, 0);
sqe->user_data = 1;
ret = io_uring_submit(&ring);
if (ret != 1) {
fprintf(stderr, "submit: %d\n", ret);
return T_EXIT_FAIL;
}
for (i = 0; i < 63; i++) {
sqe = io_uring_get_sqe(&ring);
io_uring_prep_nop(sqe);
sqe->user_data = 2;
}
ret = io_uring_submit(&ring);
if (ret != 63) {
fprintf(stderr, "submit: %d\n", ret);
return T_EXIT_FAIL;
}
for (i = 0; i < 63; i++) {
ret = io_uring_wait_cqe(&ring, &cqe);
if (ret) {
fprintf(stderr, "wait: %d\n", ret);
return T_EXIT_FAIL;
}
switch (cqe->user_data) {
case 1: /* eventfd */
fprintf(stderr, "eventfd unexpected: %d\n", (int)ptr);
return T_EXIT_FAIL;
case 2:
if (cqe->res) {
fprintf(stderr, "nop: %d\n", cqe->res);
return T_EXIT_FAIL;
}
break;
}
io_uring_cqe_seen(&ring, cqe);
}
ret = io_uring_cq_eventfd_toggle(&ring, true);
if (ret) {
fprintf(stderr, "io_uring_cq_eventfd_toggle: %d\n", ret);
return T_EXIT_FAIL;
}
sqe = io_uring_get_sqe(&ring);
io_uring_prep_nop(sqe);
sqe->user_data = 2;
ret = io_uring_submit(&ring);
if (ret != 1) {
fprintf(stderr, "submit: %d\n", ret);
return T_EXIT_FAIL;
}
for (i = 0; i < 2; i++) {
ret = io_uring_wait_cqe(&ring, &cqe);
if (ret) {
fprintf(stderr, "wait: %d\n", ret);
return T_EXIT_FAIL;
}
switch (cqe->user_data) {
case 1: /* eventfd */
if (cqe->res != sizeof(ptr)) {
fprintf(stderr, "read res: %d\n", cqe->res);
return T_EXIT_FAIL;
}
if (ptr != 1) {
fprintf(stderr, "eventfd: %d\n", (int)ptr);
return T_EXIT_FAIL;
}
break;
case 2:
if (cqe->res) {
fprintf(stderr, "nop: %d\n", cqe->res);
return T_EXIT_FAIL;
}
break;
}
io_uring_cqe_seen(&ring, cqe);
}
io_uring_queue_exit(&ring);
close(evfd);
return T_EXIT_PASS;
}
int main(int argc, char *argv[])
{
int ret;
if (argc > 1)
return T_EXIT_SKIP;
ret = test(false);
if (ret != T_EXIT_PASS) {
fprintf(stderr, "%s: test(false) failed\n", argv[0]);
return ret;
}
if (t_probe_defer_taskrun()) {
ret = test(true);
if (ret != T_EXIT_PASS) {
fprintf(stderr, "%s: test(true) failed\n", argv[0]);
return ret;
}
}
return ret;
}
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