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/* SPDX-License-Identifier: MIT */
/*
* Description: test io_uring link io with drain io
*
*/
#include <errno.h>
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include "helpers.h"
#include "liburing.h"
static int test_link_drain_one(struct io_uring *ring)
{
struct io_uring_cqe *cqe;
struct io_uring_sqe *sqe[5];
struct iovec iovecs;
int i, fd, ret;
off_t off = 0;
char data[5] = {0};
char expect[5] = {0, 1, 2, 3, 4};
fd = open("testfile", O_WRONLY | O_CREAT, 0644);
if (fd < 0) {
perror("open");
return 1;
}
iovecs.iov_base = t_malloc(4096);
iovecs.iov_len = 4096;
for (i = 0; i < 5; i++) {
sqe[i] = io_uring_get_sqe(ring);
if (!sqe[i]) {
printf("get sqe failed\n");
goto err;
}
}
/* normal heavy io */
io_uring_prep_writev(sqe[0], fd, &iovecs, 1, off);
sqe[0]->user_data = 0;
/* link io */
io_uring_prep_nop(sqe[1]);
sqe[1]->flags |= IOSQE_IO_LINK;
sqe[1]->user_data = 1;
/* link drain io */
io_uring_prep_nop(sqe[2]);
sqe[2]->flags |= (IOSQE_IO_LINK | IOSQE_IO_DRAIN);
sqe[2]->user_data = 2;
/* link io */
io_uring_prep_nop(sqe[3]);
sqe[3]->user_data = 3;
/* normal nop io */
io_uring_prep_nop(sqe[4]);
sqe[4]->user_data = 4;
ret = io_uring_submit(ring);
if (ret < 0) {
printf("sqe submit failed\n");
goto err;
} else if (ret < 5) {
printf("Submitted only %d\n", ret);
goto err;
}
for (i = 0; i < 5; i++) {
ret = io_uring_wait_cqe(ring, &cqe);
if (ret < 0) {
printf("child: wait completion %d\n", ret);
goto err;
}
data[i] = cqe->user_data;
io_uring_cqe_seen(ring, cqe);
}
if (memcmp(data, expect, 5) != 0)
goto err;
free(iovecs.iov_base);
close(fd);
unlink("testfile");
return 0;
err:
free(iovecs.iov_base);
close(fd);
unlink("testfile");
return 1;
}
int test_link_drain_multi(struct io_uring *ring)
{
struct io_uring_cqe *cqe;
struct io_uring_sqe *sqe[9];
struct iovec iovecs;
int i, fd, ret;
off_t off = 0;
char data[9] = {0};
char expect[9] = {0, 1, 2, 3, 4, 5, 6, 7, 8};
fd = open("testfile", O_WRONLY | O_CREAT, 0644);
if (fd < 0) {
perror("open");
return 1;
}
unlink("testfile");
iovecs.iov_base = t_malloc(4096);
iovecs.iov_len = 4096;
for (i = 0; i < 9; i++) {
sqe[i] = io_uring_get_sqe(ring);
if (!sqe[i]) {
printf("get sqe failed\n");
goto err;
}
}
/* normal heavy io */
io_uring_prep_writev(sqe[0], fd, &iovecs, 1, off);
sqe[0]->user_data = 0;
/* link1 io head */
io_uring_prep_nop(sqe[1]);
sqe[1]->flags |= IOSQE_IO_LINK;
sqe[1]->user_data = 1;
/* link1 drain io */
io_uring_prep_nop(sqe[2]);
sqe[2]->flags |= (IOSQE_IO_LINK | IOSQE_IO_DRAIN);
sqe[2]->user_data = 2;
/* link1 io end*/
io_uring_prep_nop(sqe[3]);
sqe[3]->user_data = 3;
/* link2 io head */
io_uring_prep_nop(sqe[4]);
sqe[4]->flags |= IOSQE_IO_LINK;
sqe[4]->user_data = 4;
/* link2 io */
io_uring_prep_nop(sqe[5]);
sqe[5]->flags |= IOSQE_IO_LINK;
sqe[5]->user_data = 5;
/* link2 drain io */
io_uring_prep_writev(sqe[6], fd, &iovecs, 1, off);
sqe[6]->flags |= (IOSQE_IO_LINK | IOSQE_IO_DRAIN);
sqe[6]->user_data = 6;
/* link2 io end */
io_uring_prep_nop(sqe[7]);
sqe[7]->user_data = 7;
/* normal io */
io_uring_prep_nop(sqe[8]);
sqe[8]->user_data = 8;
ret = io_uring_submit(ring);
if (ret < 0) {
printf("sqe submit failed\n");
goto err;
} else if (ret < 9) {
printf("Submitted only %d\n", ret);
goto err;
}
for (i = 0; i < 9; i++) {
ret = io_uring_wait_cqe(ring, &cqe);
if (ret < 0) {
printf("child: wait completion %d\n", ret);
goto err;
}
data[i] = cqe->user_data;
io_uring_cqe_seen(ring, cqe);
}
if (memcmp(data, expect, 9) != 0)
goto err;
free(iovecs.iov_base);
close(fd);
return 0;
err:
free(iovecs.iov_base);
close(fd);
return 1;
}
int main(int argc, char *argv[])
{
struct io_uring ring;
int i, ret;
if (argc > 1)
return 0;
ret = io_uring_queue_init(100, &ring, 0);
if (ret) {
printf("ring setup failed\n");
return 1;
}
for (i = 0; i < 1000; i++) {
ret = test_link_drain_one(&ring);
if (ret) {
fprintf(stderr, "test_link_drain_one failed\n");
break;
}
ret = test_link_drain_multi(&ring);
if (ret) {
fprintf(stderr, "test_link_drain_multi failed\n");
break;
}
}
return ret;
}
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