1/*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2006 Pawel Jakub Dawidek <pjd@FreeBSD.org>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29#include <sys/param.h>
30#include <sys/disklabel.h>
31#include <sys/mount.h>
32
33#include <ufs/ufs/dinode.h>
34#include <ufs/ffs/fs.h>
35
36#include <libufs.h>
37#include <libgeom.h>
38#include <core/geom.h>
39#include <misc/subr.h>
40
41#include "geom_journal.h"
42
43static struct fs *
44read_superblock(const char *prov)
45{
46	static struct uufsd disk;
47	struct fs *fs;
48
49	if (ufs_disk_fillout(&disk, prov) == -1)
50		return (NULL);
51	fs = &disk.d_fs;
52	ufs_disk_close(&disk);
53	return (fs);
54}
55
56int
57g_journal_ufs_exists(const char *prov)
58{
59
60	return (read_superblock(prov) != NULL);
61}
62
63int
64g_journal_ufs_using_last_sector(const char *prov)
65{
66	struct fs *fs;
67	off_t psize, fssize;
68
69	fs = read_superblock(prov);
70	if (fs == NULL)
71		return (0);
72	/* Provider size in 512 bytes blocks. */
73	psize = g_get_mediasize(prov) / DEV_BSIZE;
74	/* File system size in 512 bytes blocks. */
75	fssize = fsbtodb(fs, fs->fs_size);
76	return (psize <= fssize);
77}
78