1 /* $NetBSD: ffs_inode.c,v 1.10 2001/12/23 12:54:53 lukem Exp $ */ 2 3 /*- 4 * Copyright (c) 1980, 1991, 1993, 1994 5 * The Regents of the University of California. 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 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <sys/cdefs.h> 37 #ifndef lint 38 __COPYRIGHT("@(#) Copyright (c) 1980, 1991, 1993, 1994\n\ 39 The Regents of the University of California. All rights reserved.\n"); 40 #endif /* not lint */ 41 42 #ifndef lint 43 __RCSID("$NetBSD: ffs_inode.c,v 1.10 2001/12/23 12:54:53 lukem Exp $"); 44 #endif /* not lint */ 45 46 #include <sys/param.h> 47 #include <sys/time.h> 48 #include <sys/stat.h> 49 #include <ufs/ufs/dir.h> 50 #include <ufs/ufs/dinode.h> 51 #include <ufs/ffs/fs.h> 52 #include <ufs/ffs/ffs_extern.h> 53 54 #include <protocols/dumprestore.h> 55 56 #include <ctype.h> 57 #include <errno.h> 58 #include <fts.h> 59 #include <stdio.h> 60 #include <string.h> 61 #include <unistd.h> 62 63 #include "dump.h" 64 65 #ifndef SBOFF 66 #define SBOFF (SBLOCK * DEV_BSIZE) 67 #endif 68 69 struct fs *sblock; 70 71 /* 72 * Read the superblock from disk, and check its magic number. 73 * Determine whether byte-swapping needs to be done on this file system. 74 */ 75 int 76 fs_read_sblock(char *superblock) 77 { 78 int ns = 0; 79 80 sblock = (struct fs *)superblock; 81 rawread(SBOFF, (char *) superblock, SBSIZE); 82 if (sblock->fs_magic != FS_MAGIC) { 83 if (sblock->fs_magic == bswap32(FS_MAGIC)) { 84 ffs_sb_swap(sblock, sblock); 85 ns = 1; 86 } else 87 quit("bad sblock magic number\n"); 88 } 89 return ns; 90 } 91 92 /* 93 * Fill in the ufsi struct, as well as the maxino and dev_bsize global 94 * variables. 95 */ 96 struct ufsi * 97 fs_parametrize(void) 98 { 99 static struct ufsi ufsi; 100 101 #ifdef FS_44INODEFMT 102 if (sblock->fs_inodefmt >= FS_44INODEFMT) { 103 spcl.c_flags = iswap32(iswap32(spcl.c_flags) | DR_NEWINODEFMT); 104 } else { 105 /* 106 * Determine parameters for older file systems. From 107 * /sys/ufs/ffs/ffs_vfsops.c::ffs_oldfscompat() 108 * 109 * XXX: not sure if other variables (fs_npsect, fs_interleave, 110 * fs_nrpos, fs_maxfilesize) need to be fudged too. 111 */ 112 sblock->fs_qbmask = ~sblock->fs_bmask; 113 sblock->fs_qfmask = ~sblock->fs_fmask; 114 } 115 #endif 116 117 /* Fill out ufsi struct */ 118 ufsi.ufs_dsize = fsbtodb(sblock,sblock->fs_size); 119 ufsi.ufs_bsize = sblock->fs_bsize; 120 ufsi.ufs_bshift = sblock->fs_bshift; 121 ufsi.ufs_fsize = sblock->fs_fsize; 122 ufsi.ufs_frag = sblock->fs_frag; 123 ufsi.ufs_fsatoda = sblock->fs_fsbtodb; 124 ufsi.ufs_nindir = sblock->fs_nindir; 125 ufsi.ufs_inopb = sblock->fs_inopb; 126 ufsi.ufs_maxsymlinklen = sblock->fs_maxsymlinklen; 127 ufsi.ufs_bmask = sblock->fs_bmask; 128 ufsi.ufs_fmask = sblock->fs_fmask; 129 ufsi.ufs_qbmask = sblock->fs_qbmask; 130 ufsi.ufs_qfmask = sblock->fs_qfmask; 131 132 dev_bsize = sblock->fs_fsize / fsbtodb(sblock, 1); 133 134 return &ufsi; 135 } 136 137 ino_t 138 fs_maxino(void) 139 { 140 141 return sblock->fs_ipg * sblock->fs_ncg; 142 } 143 144 struct dinode * 145 getino(ino_t inum) 146 { 147 static daddr_t minino, maxino; 148 static struct dinode inoblock[MAXINOPB]; 149 int i; 150 151 curino = inum; 152 if (inum >= minino && inum < maxino) 153 return (&inoblock[inum - minino]); 154 bread(fsatoda(ufsib, ino_to_fsba(sblock, inum)), (char *)inoblock, 155 (int)ufsib->ufs_bsize); 156 if (needswap) 157 for (i = 0; i < MAXINOPB; i++) 158 ffs_dinode_swap(&inoblock[i], &inoblock[i]); 159 minino = inum - (inum % INOPB(sblock)); 160 maxino = minino + INOPB(sblock); 161 return (&inoblock[inum - minino]); 162 } 163