1/*- 2 * Copyright (c) 2006 Pawel Jakub Dawidek <pjd@FreeBSD.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27#include <sys/cdefs.h> 28__FBSDID("$FreeBSD$"); 29 30#include <sys/param.h> 31#include <sys/disklabel.h> 32#include <sys/mount.h> 33 34#include <ufs/ufs/dinode.h> 35#include <ufs/ffs/fs.h> 36 37#include <libufs.h> 38#include <libgeom.h> 39#include <core/geom.h> 40#include <misc/subr.h> 41 42#include "geom_journal.h" 43 44static struct fs * 45read_superblock(const char *prov) 46{ 47 static struct uufsd disk; 48 struct fs *fs; 49 50 if (ufs_disk_fillout(&disk, prov) == -1) 51 return (NULL); 52 fs = &disk.d_fs; 53 ufs_disk_close(&disk); 54 return (fs); 55} 56 57int 58g_journal_ufs_exists(const char *prov) 59{ 60 61 return (read_superblock(prov) != NULL); 62} 63 64int 65g_journal_ufs_using_last_sector(const char *prov) 66{ 67 struct fs *fs; 68 off_t psize, fssize; 69 70 fs = read_superblock(prov); 71 if (fs == NULL) 72 return (0); 73 /* Provider size in 512 bytes blocks. */ 74 psize = g_get_mediasize(prov) / DEV_BSIZE; 75 /* File system size in 512 bytes blocks. */ 76 fssize = fsbtodb(fs, fs->fs_size); 77 return (psize <= fssize); 78} 79