1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 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/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 #include <sys/param.h> 33 #include <sys/disklabel.h> 34 #include <sys/mount.h> 35 36 #include <ufs/ufs/dinode.h> 37 #include <ufs/ffs/fs.h> 38 39 #include <libufs.h> 40 #include <libgeom.h> 41 #include <core/geom.h> 42 #include <misc/subr.h> 43 44 #include "geom_journal.h" 45 46 static struct fs * 47 read_superblock(const char *prov) 48 { 49 static struct uufsd disk; 50 struct fs *fs; 51 52 if (ufs_disk_fillout(&disk, prov) == -1) 53 return (NULL); 54 fs = &disk.d_fs; 55 ufs_disk_close(&disk); 56 return (fs); 57 } 58 59 int 60 g_journal_ufs_exists(const char *prov) 61 { 62 63 return (read_superblock(prov) != NULL); 64 } 65 66 int 67 g_journal_ufs_using_last_sector(const char *prov) 68 { 69 struct fs *fs; 70 off_t psize, fssize; 71 72 fs = read_superblock(prov); 73 if (fs == NULL) 74 return (0); 75 /* Provider size in 512 bytes blocks. */ 76 psize = g_get_mediasize(prov) / DEV_BSIZE; 77 /* File system size in 512 bytes blocks. */ 78 fssize = fsbtodb(fs, fs->fs_size); 79 return (psize <= fssize); 80 } 81