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/*
* Description: test io_uring fsync handling
*
*/
#include <errno.h>
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include "liburing.h"
static int test_single_fsync(struct io_uring *ring)
{
struct io_uring_cqe *cqe;
struct io_uring_sqe *sqe;
char buf[32];
int fd, ret;
sprintf(buf, "./XXXXXX");
fd = mkstemp(buf);
if (fd < 0) {
perror("open");
return 1;
}
sqe = io_uring_get_sqe(ring);
if (!sqe) {
printf("get sqe failed\n");
goto err;
}
io_uring_prep_fsync(sqe, fd, 0);
ret = io_uring_submit(ring);
if (ret <= 0) {
printf("sqe submit failed: %d\n", ret);
goto err;
}
ret = io_uring_wait_cqe(ring, &cqe);
if (ret < 0) {
printf("wait completion %d\n", ret);
goto err;
}
io_uring_cqe_seen(ring, cqe);
unlink(buf);
return 0;
err:
unlink(buf);
return 1;
}
static int test_barrier_fsync(struct io_uring *ring)
{
struct io_uring_cqe *cqe;
struct io_uring_sqe *sqe;
struct iovec iovecs[4];
int i, fd, ret;
off_t off;
fd = open("testfile", O_WRONLY | O_CREAT, 0644);
if (fd < 0) {
perror("open");
return 1;
}
for (i = 0; i < 4; i++) {
iovecs[i].iov_base = malloc(4096);
iovecs[i].iov_len = 4096;
}
off = 0;
for (i = 0; i < 4; i++) {
sqe = io_uring_get_sqe(ring);
if (!sqe) {
printf("get sqe failed\n");
goto err;
}
io_uring_prep_writev(sqe, fd, &iovecs[i], 1, off);
sqe->user_data = 0;
off += 4096;
}
sqe = io_uring_get_sqe(ring);
if (!sqe) {
printf("get sqe failed\n");
goto err;
}
io_uring_prep_fsync(sqe, fd, IORING_FSYNC_DATASYNC);
sqe->user_data = 1;
io_uring_sqe_set_flags(sqe, IOSQE_IO_DRAIN);
ret = io_uring_submit(ring);
if (ret < 5) {
printf("Submitted only %d\n", ret);
goto err;
} else if (ret < 0) {
printf("sqe submit failed\n");
if (ret == EINVAL)
printf("kernel may not support barrier fsync yet\n");
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;
}
/* kernel doesn't support IOSQE_IO_DRAIN */
if (cqe->res == -EINVAL)
break;
if (i <= 3) {
if (cqe->user_data) {
printf("Got fsync early?\n");
goto err;
}
} else {
if (!cqe->user_data) {
printf("Got write late?\n");
goto err;
}
}
io_uring_cqe_seen(ring, cqe);
}
unlink("testfile");
return 0;
err:
unlink("testfile");
return 1;
}
int main(int argc, char *argv[])
{
struct io_uring ring;
int ret;
ret = io_uring_queue_init(8, &ring, 0);
if (ret) {
printf("ring setup failed\n");
return 1;
}
ret = test_single_fsync(&ring);
if (ret) {
printf("test_single_fsync failed\n");
return ret;
}
ret = test_barrier_fsync(&ring);
if (ret) {
printf("test_barrier_fsync failed\n");
return ret;
}
return 0;
}
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