1/* $NetBSD: clri.c,v 1.21 2009/03/16 13:01:21 lukem Exp $ */ 2 3/* 4 * Copyright (c) 1990, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Rich $alz of BBN Inc. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35#include <sys/cdefs.h> 36#ifndef lint 37__COPYRIGHT("@(#) Copyright (c) 1990, 1993\ 38 The Regents of the University of California. All rights reserved."); 39#endif /* not lint */ 40 41#ifndef lint 42#if 0 43static char sccsid[] = "@(#)clri.c 8.3 (Berkeley) 4/28/95"; 44#else 45__RCSID("$NetBSD: clri.c,v 1.21 2009/03/16 13:01:21 lukem Exp $"); 46#endif 47#endif /* not lint */ 48 49#include <sys/param.h> 50#include <sys/time.h> 51 52#include <ufs/ufs/dinode.h> 53#include <ufs/ufs/ufs_bswap.h> 54#include <ufs/ffs/fs.h> 55#include <ufs/ffs/ffs_extern.h> 56 57#include <err.h> 58#include <errno.h> 59#include <fcntl.h> 60#include <stdlib.h> 61#include <string.h> 62#include <stdio.h> 63#include <unistd.h> 64 65/* 66 * Possible superblock locations ordered from most to least likely. 67 */ 68static off_t sblock_try[] = SBLOCKSEARCH; 69off_t sblockloc; 70 71 72int 73main(int argc, char *argv[]) 74{ 75 struct fs *sbp; 76 struct ufs1_dinode *ip1; 77 struct ufs2_dinode *ip2; 78 int fd; 79 void *ibuf; 80 int32_t generation; 81 off_t offset; 82 size_t bsize; 83 int inonum; 84 char *fs, sblock[SBLOCKSIZE]; 85 int needswap = 0, is_ufs2 = 0; 86 int i, imax; 87 88 if (argc < 3) { 89 (void)fprintf(stderr, "usage: clri filesystem inode ...\n"); 90 exit(1); 91 } 92 93 fs = *++argv; 94 95 96 /* get the superblock. */ 97 if ((fd = open(fs, O_RDWR, 0)) < 0) 98 err(1, "%s", fs); 99 for (i = 0;; i++) { 100 sblockloc = sblock_try[i]; 101 if (sblockloc == -1) 102 errx(1, "%s: can't find superblock", fs); 103 if (pread(fd, sblock, sizeof(sblock), sblockloc) != sizeof(sblock)) 104 errx(1, "%s: can't read superblock", fs); 105 106 sbp = (struct fs *)sblock; 107 switch(sbp->fs_magic) { 108 case FS_UFS2_MAGIC: 109 is_ufs2 = 1; 110 /*FALLTHROUGH*/ 111 case FS_UFS1_MAGIC: 112 break; 113 case FS_UFS2_MAGIC_SWAPPED: 114 is_ufs2 = 1; 115 /*FALLTHROUGH*/ 116 case FS_UFS1_MAGIC_SWAPPED: 117 needswap = 1; 118 break; 119 default: 120 continue; 121 } 122 123 /* check we haven't found an alternate */ 124 if (is_ufs2 || sbp->fs_old_flags & FS_FLAGS_UPDATED) { 125 if ((uint64_t)sblockloc != ufs_rw64(sbp->fs_sblockloc, needswap)) 126 continue; 127 } else { 128 if (sblockloc == SBLOCK_UFS2) 129 continue; 130 } 131 132 break; 133 } 134 135 /* check that inode numbers are valid */ 136 imax = ufs_rw32(sbp->fs_ncg, needswap) * 137 ufs_rw32(sbp->fs_ipg, needswap); 138 for (i = 1; i < (argc - 1); i++) 139 if (atoi(argv[i]) <= 0 || atoi(argv[i]) >= imax) 140 errx(1, "%s is not a valid inode number", argv[i]); 141 142 /* delete clean flag in the superblok */ 143 sbp->fs_clean = ufs_rw32(ufs_rw32(sbp->fs_clean, needswap) << 1, 144 needswap); 145 if (lseek(fd, sblockloc, SEEK_SET) < 0) 146 err(1, "%s", fs); 147 if (write(fd, sblock, sizeof(sblock)) != sizeof(sblock)) 148 errx(1, "%s: can't rewrite superblock", fs); 149 (void)fsync(fd); 150 151 if (needswap) 152 ffs_sb_swap(sbp, sbp); 153 154 bsize = sbp->fs_bsize; 155 ibuf = malloc(bsize); 156 if (ibuf == NULL) { 157 err(1, "malloc"); 158 } 159 160 /* remaining arguments are inode numbers. */ 161 while (*++argv) { 162 /* get the inode number. */ 163 inonum = atoi(*argv); 164 (void)printf("clearing %d\n", inonum); 165 166 /* read in the appropriate block. */ 167 offset = ino_to_fsba(sbp, inonum); /* inode to fs blk */ 168 offset = fsbtodb(sbp, offset); /* fs blk disk blk */ 169 offset *= DEV_BSIZE; /* disk blk to bytes */ 170 171 /* seek and read the block */ 172 if (lseek(fd, offset, SEEK_SET) < 0) 173 err(1, "%s", fs); 174 if ((size_t)read(fd, ibuf, bsize) != bsize) 175 err(1, "%s", fs); 176 177 /* get the inode within the block. */ 178 if (is_ufs2) { 179 ip2 = &((struct ufs2_dinode *)ibuf) 180 [ino_to_fsbo(sbp, inonum)]; 181 /* clear the inode, and bump the generation count. */ 182 generation = ip2->di_gen + 1; 183 memset(ip2, 0, sizeof(*ip2)); 184 ip2->di_gen = generation; 185 } else { 186 ip1 = &((struct ufs1_dinode *)ibuf) 187 [ino_to_fsbo(sbp, inonum)]; 188 /* clear the inode, and bump the generation count. */ 189 generation = ip1->di_gen + 1; 190 memset(ip1, 0, sizeof(*ip1)); 191 ip1->di_gen = generation; 192 } 193 194 /* backup and write the block */ 195 if (lseek(fd, offset, SEEK_SET) < 0) 196 err(1, "%s", fs); 197 if ((size_t)write(fd, ibuf, bsize) != bsize) 198 err(1, "%s", fs); 199 (void)fsync(fd); 200 } 201 free(ibuf); 202 (void)close(fd); 203 exit(0); 204} 205