1 /* $NetBSD: clri.c,v 1.26 2023/02/26 22:55:02 andvar 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 $alz of BBN Inc.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 */
34
35 #include <sys/cdefs.h>
36 #ifndef lint
37 __COPYRIGHT("@(#) Copyright (c) 1990, 1993\
38 The Regents of the University of California. All rights reserved.");
39 #endif /* not lint */
40
41 #ifndef lint
42 #if 0
43 static char sccsid[] = "@(#)clri.c 8.3 (Berkeley) 4/28/95";
44 #else
45 __RCSID("$NetBSD: clri.c,v 1.26 2023/02/26 22:55:02 andvar 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 */
68 static off_t sblock_try[] = SBLOCKSEARCH;
69 off_t sblockloc;
70
71
72 int
main(int argc,char * argv[])73 main(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 long dev_bsize;
88
89 if (argc < 3) {
90 (void)fprintf(stderr, "usage: clri filesystem inode ...\n");
91 exit(1);
92 }
93
94 fs = *++argv;
95
96
97 /* get the superblock. */
98 if ((fd = open(fs, O_RDWR, 0)) < 0)
99 err(1, "%s", fs);
100 for (i = 0;; i++) {
101 sblockloc = sblock_try[i];
102 if (sblockloc == -1)
103 errx(1, "%s: can't find superblock", fs);
104 if (pread(fd, sblock, sizeof(sblock), sblockloc) != sizeof(sblock))
105 errx(1, "%s: can't read superblock", fs);
106
107 sbp = (struct fs *)sblock;
108 switch(sbp->fs_magic) {
109 case FS_UFS2_MAGIC:
110 case FS_UFS2EA_MAGIC:
111 is_ufs2 = 1;
112 /*FALLTHROUGH*/
113 case FS_UFS1_MAGIC:
114 break;
115 case FS_UFS2_MAGIC_SWAPPED:
116 case FS_UFS2EA_MAGIC_SWAPPED:
117 is_ufs2 = 1;
118 /*FALLTHROUGH*/
119 case FS_UFS1_MAGIC_SWAPPED:
120 needswap = 1;
121 break;
122 default:
123 continue;
124 }
125
126 /* check we haven't found an alternate */
127 if (is_ufs2 || sbp->fs_old_flags & FS_FLAGS_UPDATED) {
128 if ((uint64_t)sblockloc != ufs_rw64(sbp->fs_sblockloc, needswap))
129 continue;
130 } else {
131 if (sblockloc == SBLOCK_UFS2)
132 continue;
133 }
134
135 break;
136 }
137
138 /* check that inode numbers are valid */
139 imax = ufs_rw32(sbp->fs_ncg, needswap) *
140 ufs_rw32(sbp->fs_ipg, needswap);
141 for (i = 1; i < (argc - 1); i++)
142 if (atoi(argv[i]) <= 0 || atoi(argv[i]) >= imax)
143 errx(1, "%s is not a valid inode number", argv[i]);
144
145 /* delete clean flag in the superblock */
146 sbp->fs_clean = ufs_rw32(ufs_rw32(sbp->fs_clean, needswap) << 1,
147 needswap);
148 if (lseek(fd, sblockloc, SEEK_SET) < 0)
149 err(1, "%s", fs);
150 if (write(fd, sblock, sizeof(sblock)) != sizeof(sblock))
151 errx(1, "%s: can't rewrite superblock", fs);
152 (void)fsync(fd);
153
154 if (needswap)
155 ffs_sb_swap(sbp, sbp);
156
157 /* compute disk block size from superblock parameters */
158 dev_bsize = sbp->fs_fsize / FFS_FSBTODB(sbp, 1);
159
160 bsize = sbp->fs_bsize;
161 ibuf = malloc(bsize);
162 if (ibuf == NULL) {
163 err(1, "malloc");
164 }
165
166 /* remaining arguments are inode numbers. */
167 while (*++argv) {
168 /* get the inode number. */
169 inonum = atoi(*argv);
170 (void)printf("clearing %d\n", inonum);
171
172 /* read in the appropriate block. */
173 offset = ino_to_fsba(sbp, inonum); /* inode to fs blk */
174 offset = FFS_FSBTODB(sbp, offset); /* fs blk disk blk */
175 offset *= dev_bsize; /* disk blk to bytes */
176
177 /* seek and read the block */
178 if (lseek(fd, offset, SEEK_SET) < 0)
179 err(1, "%s", fs);
180 if ((size_t)read(fd, ibuf, bsize) != bsize)
181 err(1, "%s", fs);
182
183 /* get the inode within the block. */
184 if (is_ufs2) {
185 ip2 = &((struct ufs2_dinode *)ibuf)
186 [ino_to_fsbo(sbp, inonum)];
187 /* clear the inode, and bump the generation count. */
188 generation = ip2->di_gen + 1;
189 memset(ip2, 0, sizeof(*ip2));
190 ip2->di_gen = generation;
191 } else {
192 ip1 = &((struct ufs1_dinode *)ibuf)
193 [ino_to_fsbo(sbp, inonum)];
194 /* clear the inode, and bump the generation count. */
195 generation = ip1->di_gen + 1;
196 memset(ip1, 0, sizeof(*ip1));
197 ip1->di_gen = generation;
198 }
199
200 /* backup and write the block */
201 if (lseek(fd, offset, SEEK_SET) < 0)
202 err(1, "%s", fs);
203 if ((size_t)write(fd, ibuf, bsize) != bsize)
204 err(1, "%s", fs);
205 (void)fsync(fd);
206 }
207 free(ibuf);
208 (void)close(fd);
209 exit(0);
210 }
211