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 43 static struct fs * 44 read_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 56 int 57 g_journal_ufs_exists(const char *prov) 58 { 59 60 return (read_superblock(prov) != NULL); 61 } 62 63 int 64 g_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