ffs_inode.c revision 1.9
1 /* $NetBSD: ffs_inode.c,v 1.9 2001/12/22 08:05:24 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 1.9 2001/12/22 08:05:24 lukem Exp $"); 44 #endif /* not lint */ 45 46 #include <sys/param.h> 47 #include <sys/time.h> 48 #include <sys/stat.h> 49 #ifdef sunos 50 #include <sys/vnode.h> 51 52 #include <ufs/fs.h> 53 #include <ufs/fsdir.h> 54 #include <ufs/inode.h> 55 #else 56 #include <ufs/ufs/dir.h> 57 #include <ufs/ufs/dinode.h> 58 #include <ufs/ffs/fs.h> 59 #include <ufs/ffs/ffs_extern.h> 60 #endif 61 62 #include <protocols/dumprestore.h> 63 64 #include <ctype.h> 65 #include <errno.h> 66 #include <fts.h> 67 #include <stdio.h> 68 #include <string.h> 69 #include <unistd.h> 70 71 #include "dump.h" 72 73 #ifndef SBOFF 74 #define SBOFF (SBLOCK * DEV_BSIZE) 75 #endif 76 77 struct fs *sblock; 78 79 /* 80 * Read the superblock from disk, and check its magic number. 81 * Determine whether byte-swapping needs to be done on this file system. 82 */ 83 int 84 fs_read_sblock(char *superblock) 85 { 86 int ns = 0; 87 88 sblock = (struct fs *)superblock; 89 rawread(SBOFF, (char *) superblock, SBSIZE); 90 if (sblock->fs_magic != FS_MAGIC) { 91 if (sblock->fs_magic == bswap32(FS_MAGIC)) { 92 ffs_sb_swap(sblock, sblock); 93 ns = 1; 94 } else 95 quit("bad sblock magic number\n"); 96 } 97 return ns; 98 } 99 100 /* 101 * Fill in the ufsi struct, as well as the maxino and dev_bsize global 102 * variables. 103 */ 104 struct ufsi * 105 fs_parametrize(void) 106 { 107 static struct ufsi ufsi; 108 109 #ifdef FS_44INODEFMT 110 if (sblock->fs_inodefmt >= FS_44INODEFMT) { 111 spcl.c_flags = iswap32(iswap32(spcl.c_flags) | DR_NEWINODEFMT); 112 } else { 113 /* 114 * Determine parameters for older file systems. From 115 * /sys/ufs/ffs/ffs_vfsops.c::ffs_oldfscompat() 116 * 117 * XXX: not sure if other variables (fs_npsect, fs_interleave, 118 * fs_nrpos, fs_maxfilesize) need to be fudged too. 119 */ 120 sblock->fs_qbmask = ~sblock->fs_bmask; 121 sblock->fs_qfmask = ~sblock->fs_fmask; 122 } 123 #endif 124 125 /* Fill out ufsi struct */ 126 ufsi.ufs_dsize = fsbtodb(sblock,sblock->fs_size); 127 ufsi.ufs_bsize = sblock->fs_bsize; 128 ufsi.ufs_bshift = sblock->fs_bshift; 129 ufsi.ufs_fsize = sblock->fs_fsize; 130 ufsi.ufs_frag = sblock->fs_frag; 131 ufsi.ufs_fsatoda = sblock->fs_fsbtodb; 132 ufsi.ufs_nindir = sblock->fs_nindir; 133 ufsi.ufs_inopb = sblock->fs_inopb; 134 ufsi.ufs_maxsymlinklen = sblock->fs_maxsymlinklen; 135 ufsi.ufs_bmask = sblock->fs_bmask; 136 ufsi.ufs_fmask = sblock->fs_fmask; 137 ufsi.ufs_qbmask = sblock->fs_qbmask; 138 ufsi.ufs_qfmask = sblock->fs_qfmask; 139 140 dev_bsize = sblock->fs_fsize / fsbtodb(sblock, 1); 141 142 return &ufsi; 143 } 144 145 ino_t 146 fs_maxino(void) 147 { 148 149 return sblock->fs_ipg * sblock->fs_ncg; 150 } 151 152 struct dinode * 153 getino(ino_t inum) 154 { 155 static daddr_t minino, maxino; 156 static struct dinode inoblock[MAXINOPB]; 157 int i; 158 159 curino = inum; 160 if (inum >= minino && inum < maxino) 161 return (&inoblock[inum - minino]); 162 bread(fsatoda(ufsib, ino_to_fsba(sblock, inum)), (char *)inoblock, 163 (int)ufsib->ufs_bsize); 164 if (needswap) 165 for (i = 0; i < MAXINOPB; i++) 166 ffs_dinode_swap(&inoblock[i], &inoblock[i]); 167 minino = inum - (inum % INOPB(sblock)); 168 maxino = minino + INOPB(sblock); 169 return (&inoblock[inum - minino]); 170 } 171
Indexes created Wed Oct 01 07:09:59 GMT 2025