xref: /aosp_15_r20/external/ltp/testcases/kernel/syscalls/sync/sync01.c (revision 49cdfc7efb34551c7342be41a7384b9c40d7cab7)

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Copyright (c) 2019 Linaro Limited. All rights reserved.
 * Author: Sumit Garg <[email protected]>
 */

/*
 * sync03
 *
 * It basically tests sync() to sync test file having large dirty file pages
 * to block device. Also, it tests all supported filesystems on a test block
 * device.
 */

#define _GNU_SOURCE
#include <errno.h>
#include <stdlib.h>
#include <stdio.h>
#include <sys/types.h>
#include "tst_test.h"

#define MNTPOINT	"mnt_point"
#define FNAME		MNTPOINT"/test"
#define FILE_SIZE_MB	32
#define FILE_SIZE	(FILE_SIZE_MB * TST_MB)
#define MODE		0644

static void verify_sync(void)
{
	int fd;
	unsigned long written;

	fd = SAFE_OPEN(FNAME, O_RDWR|O_CREAT, MODE);

	tst_dev_sync(fd);
	tst_dev_bytes_written(tst_device->dev);

	tst_fill_fd(fd, 0, TST_MB, FILE_SIZE_MB);

	sync();

	written = tst_dev_bytes_written(tst_device->dev);

	SAFE_CLOSE(fd);

	if (written >= FILE_SIZE)
		tst_res(TPASS, "Test file synced to device");
	else
		tst_res(TFAIL, "Synced %li, expected %i", written, FILE_SIZE);
}

static struct tst_test test = {
	.needs_root = 1,
	.mount_device = 1,
	.all_filesystems = 1,
	.skip_filesystems = (const char *[]) {
		"tmpfs",
		NULL
	},
	.mntpoint = MNTPOINT,
	.test_all = verify_sync,
};