/*
 * Copyright (c) 2017 Cyril Hrubis <chrubis@suse.cz>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
/*
 * Basic test for the BLKROSET and BLKROGET ioctls.
 *
 * - Set the device read only, read the value back.
 * - Try to mount the device read write, expect failure.
 * - Try to mount the device read only, expect success.
 */

#include <errno.h>
#include <sys/mount.h>
#include "tst_test.h"

static int fd;

static void verify_ioctl(void)
{
	int ro = 1;

	SAFE_IOCTL(fd, BLKROGET, &ro);

	if (ro == 0)
		tst_res(TPASS, "BLKROGET returned 0");
	else
		tst_res(TFAIL, "BLKROGET returned %i", ro);

	ro = 1;
	SAFE_IOCTL(fd, BLKROSET, &ro);

	ro = 0;
	SAFE_IOCTL(fd, BLKROGET, &ro);

	if (ro == 0)
		tst_res(TFAIL, "BLKROGET returned 0");
	else
		tst_res(TPASS, "BLKROGET returned %i", ro);

	TEST(mount(tst_device->dev, "mntpoint", tst_device->fs_type, 0, NULL));

	if (TST_RET != -1) {
		tst_res(TFAIL, "Mounting RO device RW succeeded");
		tst_umount("mntpoint");
		goto next;
	}

	if (TST_ERR == EACCES) {
		tst_res(TPASS | TERRNO, "Mounting RO device RW failed");
		goto next;
	}

	tst_res(TFAIL | TERRNO,
		"Mounting RO device RW failed unexpectedly expected EACCES");

next:
	TEST(mount(tst_device->dev, "mntpoint", tst_device->fs_type, MS_RDONLY, NULL));

	if (TST_RET == 0) {
		tst_res(TPASS, "Mounting RO device RO works");
		tst_umount("mntpoint");
	} else {
		tst_res(TFAIL | TTERRNO, "Mounting RO device RO failed");
	}

	ro = 0;
	SAFE_IOCTL(fd, BLKROSET, &ro);
}

static void setup(void)
{
	SAFE_MKDIR("mntpoint", 0777);
	fd = SAFE_OPEN(tst_device->dev, O_RDONLY);
}

static void cleanup(void)
{
	if (fd > 0)
		SAFE_CLOSE(fd);
}

static struct tst_test test = {
	.needs_tmpdir = 1,
	.format_device = 1,
	.needs_root = 1,
	.setup = setup,
	.cleanup = cleanup,
	.test_all = verify_ioctl,
};