/* SPDX-License-Identifier: MIT */

/*

 * 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) {

		fprintf(stderr, "get sqe failed\n");

		goto err;

	}

	io_uring_prep_fsync(sqe, fd, 0);

	ret = io_uring_submit(ring);

	if (ret <= 0) {

		fprintf(stderr, "sqe submit failed: %d\n", ret);

		goto err;

	}

	ret = io_uring_wait_cqe(ring, &cqe);

	if (ret < 0) {

		fprintf(stderr, "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) {

			fprintf(stderr, "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) {

		fprintf(stderr, "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 < 0) {

		fprintf(stderr, "sqe submit failed: %d\n", ret);

		goto err;

	} else if (ret < 5) {

		fprintf(stderr, "Submitted only %d\n", ret);

		goto err;

	}

	for (i = 0; i < 5; i++) {

		ret = io_uring_wait_cqe(ring, &cqe);

		if (ret < 0) {

			fprintf(stderr, "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) {

				fprintf(stderr, "Got fsync early?\n");

				goto err;

			}

		} else {

			if (!cqe->user_data) {

				fprintf(stderr, "Got write late?\n");

				goto err;

			}

		}

		io_uring_cqe_seen(ring, cqe);

	}

	unlink("testfile");

	return 0;

err:

	unlink("testfile");

	return 1;

}

#define FILE_SIZE 1024

static int create_file(const char *file)

{

	ssize_t ret;

	char *buf;

	int fd;

	buf = malloc(FILE_SIZE);

	memset(buf, 0xaa, FILE_SIZE);

	fd = open(file, O_WRONLY | O_CREAT, 0644);

	if (fd < 0) {

		perror("open file");

		return 1;

	}

	ret = write(fd, buf, FILE_SIZE);

	close(fd);

	return ret != FILE_SIZE;

}

static int test_sync_file_range(struct io_uring *ring)

{

	int ret, fd, save_errno;

	struct io_uring_sqe *sqe;

	struct io_uring_cqe *cqe;

	if (create_file(".sync_file_range")) {

		fprintf(stderr, "file creation failed\n");

		return 1;

	}

	fd = open(".sync_file_range", O_RDWR);

	save_errno = errno;

	unlink(".sync_file_range");

	errno = save_errno;

	if (fd < 0) {

		perror("file open");

		return 1;

	}

	sqe = io_uring_get_sqe(ring);

	if (!sqe) {

		fprintf(stderr, "sqe get failed\n");

		return 1;

	}

	memset(sqe, 0, sizeof(*sqe));

	sqe->opcode = IORING_OP_SYNC_FILE_RANGE;

	sqe->off = 0;

	sqe->len = 0;

	sqe->sync_range_flags = 0;

	sqe->user_data = 1;

	sqe->fd = fd;

	ret = io_uring_submit(ring);

	if (ret != 1) {

		fprintf(stderr, "submit failed: %d\n", ret);

		return 1;

	}

	ret = io_uring_wait_cqe(ring, &cqe);

	if (ret) {

		fprintf(stderr, "wait_cqe failed: %d\n", ret);

		return 1;

	}

	if (cqe->res) {

		fprintf(stderr, "sfr failed: %d\n", cqe->res);

		return 1;

	}

	io_uring_cqe_seen(ring, cqe);

	return 0;

}

int main(int argc, char *argv[])

{

	struct io_uring ring;

	int ret;

	if (argc > 1)

		return 0;

	ret = io_uring_queue_init(8, &ring, 0);

	if (ret) {

		fprintf(stderr, "ring setup failed\n");

		return 1;

	}

	ret = test_single_fsync(&ring);

	if (ret) {

		fprintf(stderr, "test_single_fsync failed\n");

		return ret;

	}

	ret = test_barrier_fsync(&ring);

	if (ret) {

		fprintf(stderr, "test_barrier_fsync failed\n");

		return ret;

	}

	ret = test_sync_file_range(&ring);

	if (ret) {

		fprintf(stderr, "test_sync_file_range failed\n");

		return ret;

	}

	return 0;

}