1/*
2 * Copyright (c) 1980, 1986, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#ifndef lint
35static const char sccsid[] = "@(#)setup.c 8.10 (Berkeley) 5/9/95";
36#endif /* not lint */
37
38#define DKTYPENAMES
39#include <sys/param.h>
40#include <sys/time.h>
41#include <sys/stat.h>
42#include <sys/ioctl.h>
43#include <sys/disklabel.h>
44#include <sys/file.h>
45
46#include <ufs/ufs/dinode.h>
47#include <ufs/ffs/fs.h>
48
49#include <ctype.h>
50#include <err.h>
51#include <errno.h>
52#include <string.h>
53
54#include "fsck.h"
55
56struct bufarea asblk;
57#define altsblock (*asblk.b_un.b_fs)
58#define POWEROF2(num) (((num) & ((num) - 1)) == 0)
59
60static void badsb __P((int listerr, char *s));
61static int calcsb __P((char *dev, int devfd, struct fs *fs));
62static struct disklabel *getdisklabel __P((char *s, int fd));
63static int readsb __P((int listerr));
64
65/*
66 * Read in a superblock finding an alternate if necessary.
67 * Return 1 if successful, 0 if unsuccessful, -1 if filesystem
68 * is already clean (preen mode only).
69 */
70int
71setup(dev)
72 char *dev;
73{
74 long cg, size, asked, i, j;
75 long skipclean, bmapsize;
76 struct disklabel *lp;
77 off_t sizepb;
78 struct stat statb;
79 struct fs proto;
80
81 havesb = 0;
82 fswritefd = -1;
83 skipclean = preen;
84 if (stat(dev, &statb) < 0) {
85 printf("Can't stat %s: %s\n", dev, strerror(errno));
86 return (0);
87 }
88 if ((statb.st_mode & S_IFMT) != S_IFCHR) {
89 pfatal("%s is not a character device", dev);
90 if (reply("CONTINUE") == 0)
91 return (0);
92 }
93 if ((fsreadfd = open(dev, O_RDONLY)) < 0) {
94 printf("Can't open %s: %s\n", dev, strerror(errno));
95 return (0);
96 }
97 if (preen == 0)
98 printf("** %s", dev);
99 if (nflag || (fswritefd = open(dev, O_WRONLY)) < 0) {
100 fswritefd = -1;
101 if (preen)
102 pfatal("NO WRITE ACCESS");
103 printf(" (NO WRITE)");
104 }
105 if (preen == 0)
106 printf("\n");
107 fsmodified = 0;
108 lfdir = 0;
109 initbarea(&sblk);
110 initbarea(&asblk);
111 sblk.b_un.b_buf = malloc(SBSIZE);
112 asblk.b_un.b_buf = malloc(SBSIZE);
113 if (sblk.b_un.b_buf == NULL || asblk.b_un.b_buf == NULL)
114 errx(EEXIT, "cannot allocate space for superblock");
115 lp = getdisklabel((char *)NULL, fsreadfd);
116 if (lp)
117 dev_bsize = secsize = lp->d_secsize;
118 else
119 dev_bsize = secsize = DEV_BSIZE;
120 /*
121 * Read in the superblock, looking for alternates if necessary
122 */
123 if (readsb(1) == 0) {
124 skipclean = 0;
125 if (bflag || preen || calcsb(dev, fsreadfd, &proto) == 0)
126 return(0);
127 if (reply("LOOK FOR ALTERNATE SUPERBLOCKS") == 0)
128 return (0);
129 for (cg = 0; cg < proto.fs_ncg; cg++) {
130 bflag = fsbtodb(&proto, cgsblock(&proto, cg));
131 if (readsb(0) != 0)
132 break;
133 }
134 if (cg >= proto.fs_ncg) {
135 printf("%s %s\n%s %s\n%s %s\n",
136 "SEARCH FOR ALTERNATE SUPER-BLOCK",
137 "FAILED. YOU MUST USE THE",
138 "-b OPTION TO FSCK TO SPECIFY THE",
139 "LOCATION OF AN ALTERNATE",
140 "SUPER-BLOCK TO SUPPLY NEEDED",
141 "INFORMATION; SEE fsck(8).");
142 bflag = 0;
143 return(0);
144 }
145 pwarn("USING ALTERNATE SUPERBLOCK AT %d\n", bflag);
146 bflag = 0;
147 }
148 maxfsblock = sblock.fs_size;
149 maxino = sblock.fs_ncg * sblock.fs_ipg;
150 /*
151 * Check and potentially fix certain fields in the super block.
152 */
153 if (sblock.fs_optim != FS_OPTTIME && sblock.fs_optim != FS_OPTSPACE) {
154 pfatal("UNDEFINED OPTIMIZATION IN SUPERBLOCK");
155 if (reply("SET TO DEFAULT") == 1) {
156 sblock.fs_optim = FS_OPTTIME;
157 sbdirty();
158 }
159 }
160 if ((sblock.fs_minfree < 0 || sblock.fs_minfree > 99)) {
161 pfatal("IMPOSSIBLE MINFREE=%d IN SUPERBLOCK",
162 sblock.fs_minfree);
163 if (reply("SET TO DEFAULT") == 1) {
164 sblock.fs_minfree = 10;
165 sbdirty();
166 }
167 }
168 if (sblock.fs_interleave < 1 ||
169 sblock.fs_interleave > sblock.fs_nsect) {
170 pwarn("IMPOSSIBLE INTERLEAVE=%d IN SUPERBLOCK",
171 sblock.fs_interleave);
172 sblock.fs_interleave = 1;
173 if (preen)
174 printf(" (FIXED)\n");
175 if (preen || reply("SET TO DEFAULT") == 1) {
176 sbdirty();
177 dirty(&asblk);
178 }
179 }
180 if (sblock.fs_npsect < sblock.fs_nsect ||
181 sblock.fs_npsect > sblock.fs_nsect*2) {
182 pwarn("IMPOSSIBLE NPSECT=%d IN SUPERBLOCK",
183 sblock.fs_npsect);
184 sblock.fs_npsect = sblock.fs_nsect;
185 if (preen)
186 printf(" (FIXED)\n");
187 if (preen || reply("SET TO DEFAULT") == 1) {
188 sbdirty();
189 dirty(&asblk);
190 }
191 }
192 if (sblock.fs_inodefmt >= FS_44INODEFMT) {
193 newinofmt = 1;
194 } else {
195 sblock.fs_qbmask = ~sblock.fs_bmask;
196 sblock.fs_qfmask = ~sblock.fs_fmask;
197 newinofmt = 0;
198 }
199 /*
200 * Convert to new inode format.
201 */
202 if (cvtlevel >= 2 && sblock.fs_inodefmt < FS_44INODEFMT) {
203 if (preen)
204 pwarn("CONVERTING TO NEW INODE FORMAT\n");
205 else if (!reply("CONVERT TO NEW INODE FORMAT"))
206 return(0);
207 doinglevel2++;
208 sblock.fs_inodefmt = FS_44INODEFMT;
209 sizepb = sblock.fs_bsize;
210 sblock.fs_maxfilesize = sblock.fs_bsize * NDADDR - 1;
211 for (i = 0; i < NIADDR; i++) {
212 sizepb *= NINDIR(&sblock);
213 sblock.fs_maxfilesize += sizepb;
214 }
215 sblock.fs_maxsymlinklen = MAXSYMLINKLEN;
216 sblock.fs_qbmask = ~sblock.fs_bmask;
217 sblock.fs_qfmask = ~sblock.fs_fmask;
218 sbdirty();
219 dirty(&asblk);
220 }
221 /*
222 * Convert to new cylinder group format.
223 */
224 if (cvtlevel >= 1 && sblock.fs_postblformat == FS_42POSTBLFMT) {
225 if (preen)
226 pwarn("CONVERTING TO NEW CYLINDER GROUP FORMAT\n");
227 else if (!reply("CONVERT TO NEW CYLINDER GROUP FORMAT"))
228 return(0);
229 doinglevel1++;
230 sblock.fs_postblformat = FS_DYNAMICPOSTBLFMT;
231 sblock.fs_nrpos = 8;
232 sblock.fs_postbloff =
233 (char *)(&sblock.fs_opostbl[0][0]) -
234 (char *)(&sblock.fs_firstfield);
235 sblock.fs_rotbloff = &sblock.fs_space[0] -
236 (u_char *)(&sblock.fs_firstfield);
237 sblock.fs_cgsize =
238 fragroundup(&sblock, CGSIZE(&sblock));
239 sbdirty();
240 dirty(&asblk);
241 }
242 if (asblk.b_dirty && !bflag) {
243 memmove(&altsblock, &sblock, (size_t)sblock.fs_sbsize);
244 flush(fswritefd, &asblk);
245 }
246 /*
247 * read in the summary info.
248 */
249 asked = 0;
250 for (i = 0, j = 0; i < sblock.fs_cssize; i += sblock.fs_bsize, j++) {
251 size = sblock.fs_cssize - i < sblock.fs_bsize ?
252 sblock.fs_cssize - i : sblock.fs_bsize;
253 sblock.fs_csp[j] = (struct csum *)calloc(1, (unsigned)size);
254 if (bread(fsreadfd, (char *)sblock.fs_csp[j],
255 fsbtodb(&sblock, sblock.fs_csaddr + j * sblock.fs_frag),
256 size) != 0 && !asked) {
257 pfatal("BAD SUMMARY INFORMATION");
258 if (reply("CONTINUE") == 0)
259 exit(EEXIT);
260 asked++;
261 }
262 }
263 /*
264 * If we survive the above basic checks and are preening,
265 * quit here unless forced.
266 */
267 if (skipclean && sblock.fs_clean && !fflag)
268 return (-1);
269 /*
270 * allocate and initialize the necessary maps
271 */
272 bmapsize = roundup(howmany(maxfsblock, NBBY), sizeof(short));
273 blockmap = calloc((unsigned)bmapsize, sizeof (char));
274 if (blockmap == NULL) {
275 printf("cannot alloc %u bytes for blockmap\n",
276 (unsigned)bmapsize);
277 goto badsb;
278 }
279 statemap = calloc((unsigned)(maxino + 1), sizeof(char));
280 if (statemap == NULL) {
281 printf("cannot alloc %u bytes for statemap\n",
282 (unsigned)(maxino + 1));
283 goto badsb;
284 }
285 typemap = calloc((unsigned)(maxino + 1), sizeof(char));
286 if (typemap == NULL) {
287 printf("cannot alloc %u bytes for typemap\n",
288 (unsigned)(maxino + 1));
289 goto badsb;
290 }
291 lncntp = (short *)calloc((unsigned)(maxino + 1), sizeof(short));
292 if (lncntp == NULL) {
293 printf("cannot alloc %u bytes for lncntp\n",
294 (unsigned)(maxino + 1) * sizeof(short));
295 goto badsb;
296 }
297 numdirs = sblock.fs_cstotal.cs_ndir;
298 inplast = 0;
299 listmax = numdirs + 10;
300 inpsort = (struct inoinfo **)calloc((unsigned)listmax,
301 sizeof(struct inoinfo *));
302 inphead = (struct inoinfo **)calloc((unsigned)numdirs,
303 sizeof(struct inoinfo *));
304 if (inpsort == NULL || inphead == NULL) {
305 printf("cannot alloc %u bytes for inphead\n",
306 (unsigned)numdirs * sizeof(struct inoinfo *));
307 goto badsb;
308 }
309 bufinit();
310 return (1);
311
312badsb:
313 ckfini(0);
314 return (0);
315}
316
317/*
318 * Read in the super block and its summary info.
319 */
320static int
321readsb(listerr)
322 int listerr;
323{
324 ufs_daddr_t super = bflag ? bflag : SBOFF / dev_bsize;
325
326 if (bread(fsreadfd, (char *)&sblock, super, (long)SBSIZE) != 0)
327 return (0);
328 sblk.b_bno = super;
329 sblk.b_size = SBSIZE;
330 /*
331 * run a few consistency checks of the super block
332 */
333 if (sblock.fs_magic != FS_MAGIC)
334 { badsb(listerr, "MAGIC NUMBER WRONG"); return (0); }
335 if (sblock.fs_ncg < 1)
336 { badsb(listerr, "NCG OUT OF RANGE"); return (0); }
337 if (sblock.fs_cpg < 1)
338 { badsb(listerr, "CPG OUT OF RANGE"); return (0); }
339 if (sblock.fs_ncg * sblock.fs_cpg < sblock.fs_ncyl ||
340 (sblock.fs_ncg - 1) * sblock.fs_cpg >= sblock.fs_ncyl)
341 { badsb(listerr, "NCYL LESS THAN NCG*CPG"); return (0); }
342 if (sblock.fs_sbsize > SBSIZE)
343 { badsb(listerr, "SIZE PREPOSTEROUSLY LARGE"); return (0); }
344 /*
345 * Compute block size that the filesystem is based on,
346 * according to fsbtodb, and adjust superblock block number
347 * so we can tell if this is an alternate later.
348 */
349 super *= dev_bsize;
350 dev_bsize = sblock.fs_fsize / fsbtodb(&sblock, 1);
351 sblk.b_bno = super / dev_bsize;
352 if (bflag) {
353 havesb = 1;
354 return (1);
355 }
356 /*
357 * Set all possible fields that could differ, then do check
358 * of whole super block against an alternate super block.
359 * When an alternate super-block is specified this check is skipped.
360 */
361 getblk(&asblk, cgsblock(&sblock, sblock.fs_ncg - 1), sblock.fs_sbsize);
362 if (asblk.b_errs)
363 return (0);
364 altsblock.fs_firstfield = sblock.fs_firstfield;
365 altsblock.fs_unused_1 = sblock.fs_unused_1;
366 altsblock.fs_time = sblock.fs_time;
367 altsblock.fs_cstotal = sblock.fs_cstotal;
368 altsblock.fs_cgrotor = sblock.fs_cgrotor;
369 altsblock.fs_fmod = sblock.fs_fmod;
370 altsblock.fs_clean = sblock.fs_clean;
371 altsblock.fs_ronly = sblock.fs_ronly;
372 altsblock.fs_flags = sblock.fs_flags;
373 altsblock.fs_maxcontig = sblock.fs_maxcontig;
374 altsblock.fs_minfree = sblock.fs_minfree;
375 altsblock.fs_optim = sblock.fs_optim;
376 altsblock.fs_rotdelay = sblock.fs_rotdelay;
377 altsblock.fs_maxbpg = sblock.fs_maxbpg;
378 memmove(altsblock.fs_csp, sblock.fs_csp, sizeof sblock.fs_csp);
379 altsblock.fs_maxcluster = sblock.fs_maxcluster;
380 memmove(altsblock.fs_fsmnt, sblock.fs_fsmnt, sizeof sblock.fs_fsmnt);
381 memmove(altsblock.fs_sparecon,
382 sblock.fs_sparecon, sizeof sblock.fs_sparecon);
383 /*
384 * The following should not have to be copied.
385 */
386 altsblock.fs_fsbtodb = sblock.fs_fsbtodb;
387 altsblock.fs_interleave = sblock.fs_interleave;
388 altsblock.fs_npsect = sblock.fs_npsect;
389 altsblock.fs_nrpos = sblock.fs_nrpos;
390 altsblock.fs_state = sblock.fs_state;
391 altsblock.fs_qbmask = sblock.fs_qbmask;
392 altsblock.fs_qfmask = sblock.fs_qfmask;
393 altsblock.fs_state = sblock.fs_state;
394 altsblock.fs_maxfilesize = sblock.fs_maxfilesize;
395 if (memcmp(&sblock, &altsblock, (int)sblock.fs_sbsize)) {
396 if (debug) {
397 long *nlp, *olp, *endlp;
398
399 printf("superblock mismatches\n");
400 nlp = (long *)&altsblock;
401 olp = (long *)&sblock;
402 endlp = olp + (sblock.fs_sbsize / sizeof *olp);
403 for ( ; olp < endlp; olp++, nlp++) {
404 if (*olp == *nlp)
405 continue;
406 printf("offset %d, original %d, alternate %d\n",
407 olp - (long *)&sblock, *olp, *nlp);
408 }
409 }
410 badsb(listerr,
411 "VALUES IN SUPER BLOCK DISAGREE WITH THOSE IN FIRST ALTERNATE");
412 return (0);
413 }
414 havesb = 1;
415 return (1);
416}
417
418static void
419badsb(listerr, s)
420 int listerr;
421 char *s;
422{
423
424 if (!listerr)
425 return;
426 if (preen)
427 printf("%s: ", cdevname);
428 pfatal("BAD SUPER BLOCK: %s\n", s);
429}
430
431/*
432 * Calculate a prototype superblock based on information in the disk label.
433 * When done the cgsblock macro can be calculated and the fs_ncg field
434 * can be used. Do NOT attempt to use other macros without verifying that
435 * their needed information is available!
436 */
437static int
438calcsb(dev, devfd, fs)
439 char *dev;
440 int devfd;
441 register struct fs *fs;
442{
443 register struct disklabel *lp;
444 register struct partition *pp;
445 register char *cp;
446 int i;
447
448 cp = strchr(dev, '\0') - 1;
449 if (cp == (char *)-1 || ((*cp < 'a' || *cp > 'h') && !isdigit(*cp))) {
450 pfatal("%s: CANNOT FIGURE OUT FILE SYSTEM PARTITION\n", dev);
451 return (0);
452 }
453 lp = getdisklabel(dev, devfd);
454 if (isdigit(*cp))
455 pp = &lp->d_partitions[0];
456 else
457 pp = &lp->d_partitions[*cp - 'a'];
458 if (pp->p_fstype != FS_BSDFFS) {
459 pfatal("%s: NOT LABELED AS A BSD FILE SYSTEM (%s)\n",
460 dev, pp->p_fstype < FSMAXTYPES ?
461 fstypenames[pp->p_fstype] : "unknown");
462 return (0);
463 }
| 1/*
2 * Copyright (c) 1980, 1986, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#ifndef lint
35static const char sccsid[] = "@(#)setup.c 8.10 (Berkeley) 5/9/95";
36#endif /* not lint */
37
38#define DKTYPENAMES
39#include <sys/param.h>
40#include <sys/time.h>
41#include <sys/stat.h>
42#include <sys/ioctl.h>
43#include <sys/disklabel.h>
44#include <sys/file.h>
45
46#include <ufs/ufs/dinode.h>
47#include <ufs/ffs/fs.h>
48
49#include <ctype.h>
50#include <err.h>
51#include <errno.h>
52#include <string.h>
53
54#include "fsck.h"
55
56struct bufarea asblk;
57#define altsblock (*asblk.b_un.b_fs)
58#define POWEROF2(num) (((num) & ((num) - 1)) == 0)
59
60static void badsb __P((int listerr, char *s));
61static int calcsb __P((char *dev, int devfd, struct fs *fs));
62static struct disklabel *getdisklabel __P((char *s, int fd));
63static int readsb __P((int listerr));
64
65/*
66 * Read in a superblock finding an alternate if necessary.
67 * Return 1 if successful, 0 if unsuccessful, -1 if filesystem
68 * is already clean (preen mode only).
69 */
70int
71setup(dev)
72 char *dev;
73{
74 long cg, size, asked, i, j;
75 long skipclean, bmapsize;
76 struct disklabel *lp;
77 off_t sizepb;
78 struct stat statb;
79 struct fs proto;
80
81 havesb = 0;
82 fswritefd = -1;
83 skipclean = preen;
84 if (stat(dev, &statb) < 0) {
85 printf("Can't stat %s: %s\n", dev, strerror(errno));
86 return (0);
87 }
88 if ((statb.st_mode & S_IFMT) != S_IFCHR) {
89 pfatal("%s is not a character device", dev);
90 if (reply("CONTINUE") == 0)
91 return (0);
92 }
93 if ((fsreadfd = open(dev, O_RDONLY)) < 0) {
94 printf("Can't open %s: %s\n", dev, strerror(errno));
95 return (0);
96 }
97 if (preen == 0)
98 printf("** %s", dev);
99 if (nflag || (fswritefd = open(dev, O_WRONLY)) < 0) {
100 fswritefd = -1;
101 if (preen)
102 pfatal("NO WRITE ACCESS");
103 printf(" (NO WRITE)");
104 }
105 if (preen == 0)
106 printf("\n");
107 fsmodified = 0;
108 lfdir = 0;
109 initbarea(&sblk);
110 initbarea(&asblk);
111 sblk.b_un.b_buf = malloc(SBSIZE);
112 asblk.b_un.b_buf = malloc(SBSIZE);
113 if (sblk.b_un.b_buf == NULL || asblk.b_un.b_buf == NULL)
114 errx(EEXIT, "cannot allocate space for superblock");
115 lp = getdisklabel((char *)NULL, fsreadfd);
116 if (lp)
117 dev_bsize = secsize = lp->d_secsize;
118 else
119 dev_bsize = secsize = DEV_BSIZE;
120 /*
121 * Read in the superblock, looking for alternates if necessary
122 */
123 if (readsb(1) == 0) {
124 skipclean = 0;
125 if (bflag || preen || calcsb(dev, fsreadfd, &proto) == 0)
126 return(0);
127 if (reply("LOOK FOR ALTERNATE SUPERBLOCKS") == 0)
128 return (0);
129 for (cg = 0; cg < proto.fs_ncg; cg++) {
130 bflag = fsbtodb(&proto, cgsblock(&proto, cg));
131 if (readsb(0) != 0)
132 break;
133 }
134 if (cg >= proto.fs_ncg) {
135 printf("%s %s\n%s %s\n%s %s\n",
136 "SEARCH FOR ALTERNATE SUPER-BLOCK",
137 "FAILED. YOU MUST USE THE",
138 "-b OPTION TO FSCK TO SPECIFY THE",
139 "LOCATION OF AN ALTERNATE",
140 "SUPER-BLOCK TO SUPPLY NEEDED",
141 "INFORMATION; SEE fsck(8).");
142 bflag = 0;
143 return(0);
144 }
145 pwarn("USING ALTERNATE SUPERBLOCK AT %d\n", bflag);
146 bflag = 0;
147 }
148 maxfsblock = sblock.fs_size;
149 maxino = sblock.fs_ncg * sblock.fs_ipg;
150 /*
151 * Check and potentially fix certain fields in the super block.
152 */
153 if (sblock.fs_optim != FS_OPTTIME && sblock.fs_optim != FS_OPTSPACE) {
154 pfatal("UNDEFINED OPTIMIZATION IN SUPERBLOCK");
155 if (reply("SET TO DEFAULT") == 1) {
156 sblock.fs_optim = FS_OPTTIME;
157 sbdirty();
158 }
159 }
160 if ((sblock.fs_minfree < 0 || sblock.fs_minfree > 99)) {
161 pfatal("IMPOSSIBLE MINFREE=%d IN SUPERBLOCK",
162 sblock.fs_minfree);
163 if (reply("SET TO DEFAULT") == 1) {
164 sblock.fs_minfree = 10;
165 sbdirty();
166 }
167 }
168 if (sblock.fs_interleave < 1 ||
169 sblock.fs_interleave > sblock.fs_nsect) {
170 pwarn("IMPOSSIBLE INTERLEAVE=%d IN SUPERBLOCK",
171 sblock.fs_interleave);
172 sblock.fs_interleave = 1;
173 if (preen)
174 printf(" (FIXED)\n");
175 if (preen || reply("SET TO DEFAULT") == 1) {
176 sbdirty();
177 dirty(&asblk);
178 }
179 }
180 if (sblock.fs_npsect < sblock.fs_nsect ||
181 sblock.fs_npsect > sblock.fs_nsect*2) {
182 pwarn("IMPOSSIBLE NPSECT=%d IN SUPERBLOCK",
183 sblock.fs_npsect);
184 sblock.fs_npsect = sblock.fs_nsect;
185 if (preen)
186 printf(" (FIXED)\n");
187 if (preen || reply("SET TO DEFAULT") == 1) {
188 sbdirty();
189 dirty(&asblk);
190 }
191 }
192 if (sblock.fs_inodefmt >= FS_44INODEFMT) {
193 newinofmt = 1;
194 } else {
195 sblock.fs_qbmask = ~sblock.fs_bmask;
196 sblock.fs_qfmask = ~sblock.fs_fmask;
197 newinofmt = 0;
198 }
199 /*
200 * Convert to new inode format.
201 */
202 if (cvtlevel >= 2 && sblock.fs_inodefmt < FS_44INODEFMT) {
203 if (preen)
204 pwarn("CONVERTING TO NEW INODE FORMAT\n");
205 else if (!reply("CONVERT TO NEW INODE FORMAT"))
206 return(0);
207 doinglevel2++;
208 sblock.fs_inodefmt = FS_44INODEFMT;
209 sizepb = sblock.fs_bsize;
210 sblock.fs_maxfilesize = sblock.fs_bsize * NDADDR - 1;
211 for (i = 0; i < NIADDR; i++) {
212 sizepb *= NINDIR(&sblock);
213 sblock.fs_maxfilesize += sizepb;
214 }
215 sblock.fs_maxsymlinklen = MAXSYMLINKLEN;
216 sblock.fs_qbmask = ~sblock.fs_bmask;
217 sblock.fs_qfmask = ~sblock.fs_fmask;
218 sbdirty();
219 dirty(&asblk);
220 }
221 /*
222 * Convert to new cylinder group format.
223 */
224 if (cvtlevel >= 1 && sblock.fs_postblformat == FS_42POSTBLFMT) {
225 if (preen)
226 pwarn("CONVERTING TO NEW CYLINDER GROUP FORMAT\n");
227 else if (!reply("CONVERT TO NEW CYLINDER GROUP FORMAT"))
228 return(0);
229 doinglevel1++;
230 sblock.fs_postblformat = FS_DYNAMICPOSTBLFMT;
231 sblock.fs_nrpos = 8;
232 sblock.fs_postbloff =
233 (char *)(&sblock.fs_opostbl[0][0]) -
234 (char *)(&sblock.fs_firstfield);
235 sblock.fs_rotbloff = &sblock.fs_space[0] -
236 (u_char *)(&sblock.fs_firstfield);
237 sblock.fs_cgsize =
238 fragroundup(&sblock, CGSIZE(&sblock));
239 sbdirty();
240 dirty(&asblk);
241 }
242 if (asblk.b_dirty && !bflag) {
243 memmove(&altsblock, &sblock, (size_t)sblock.fs_sbsize);
244 flush(fswritefd, &asblk);
245 }
246 /*
247 * read in the summary info.
248 */
249 asked = 0;
250 for (i = 0, j = 0; i < sblock.fs_cssize; i += sblock.fs_bsize, j++) {
251 size = sblock.fs_cssize - i < sblock.fs_bsize ?
252 sblock.fs_cssize - i : sblock.fs_bsize;
253 sblock.fs_csp[j] = (struct csum *)calloc(1, (unsigned)size);
254 if (bread(fsreadfd, (char *)sblock.fs_csp[j],
255 fsbtodb(&sblock, sblock.fs_csaddr + j * sblock.fs_frag),
256 size) != 0 && !asked) {
257 pfatal("BAD SUMMARY INFORMATION");
258 if (reply("CONTINUE") == 0)
259 exit(EEXIT);
260 asked++;
261 }
262 }
263 /*
264 * If we survive the above basic checks and are preening,
265 * quit here unless forced.
266 */
267 if (skipclean && sblock.fs_clean && !fflag)
268 return (-1);
269 /*
270 * allocate and initialize the necessary maps
271 */
272 bmapsize = roundup(howmany(maxfsblock, NBBY), sizeof(short));
273 blockmap = calloc((unsigned)bmapsize, sizeof (char));
274 if (blockmap == NULL) {
275 printf("cannot alloc %u bytes for blockmap\n",
276 (unsigned)bmapsize);
277 goto badsb;
278 }
279 statemap = calloc((unsigned)(maxino + 1), sizeof(char));
280 if (statemap == NULL) {
281 printf("cannot alloc %u bytes for statemap\n",
282 (unsigned)(maxino + 1));
283 goto badsb;
284 }
285 typemap = calloc((unsigned)(maxino + 1), sizeof(char));
286 if (typemap == NULL) {
287 printf("cannot alloc %u bytes for typemap\n",
288 (unsigned)(maxino + 1));
289 goto badsb;
290 }
291 lncntp = (short *)calloc((unsigned)(maxino + 1), sizeof(short));
292 if (lncntp == NULL) {
293 printf("cannot alloc %u bytes for lncntp\n",
294 (unsigned)(maxino + 1) * sizeof(short));
295 goto badsb;
296 }
297 numdirs = sblock.fs_cstotal.cs_ndir;
298 inplast = 0;
299 listmax = numdirs + 10;
300 inpsort = (struct inoinfo **)calloc((unsigned)listmax,
301 sizeof(struct inoinfo *));
302 inphead = (struct inoinfo **)calloc((unsigned)numdirs,
303 sizeof(struct inoinfo *));
304 if (inpsort == NULL || inphead == NULL) {
305 printf("cannot alloc %u bytes for inphead\n",
306 (unsigned)numdirs * sizeof(struct inoinfo *));
307 goto badsb;
308 }
309 bufinit();
310 return (1);
311
312badsb:
313 ckfini(0);
314 return (0);
315}
316
317/*
318 * Read in the super block and its summary info.
319 */
320static int
321readsb(listerr)
322 int listerr;
323{
324 ufs_daddr_t super = bflag ? bflag : SBOFF / dev_bsize;
325
326 if (bread(fsreadfd, (char *)&sblock, super, (long)SBSIZE) != 0)
327 return (0);
328 sblk.b_bno = super;
329 sblk.b_size = SBSIZE;
330 /*
331 * run a few consistency checks of the super block
332 */
333 if (sblock.fs_magic != FS_MAGIC)
334 { badsb(listerr, "MAGIC NUMBER WRONG"); return (0); }
335 if (sblock.fs_ncg < 1)
336 { badsb(listerr, "NCG OUT OF RANGE"); return (0); }
337 if (sblock.fs_cpg < 1)
338 { badsb(listerr, "CPG OUT OF RANGE"); return (0); }
339 if (sblock.fs_ncg * sblock.fs_cpg < sblock.fs_ncyl ||
340 (sblock.fs_ncg - 1) * sblock.fs_cpg >= sblock.fs_ncyl)
341 { badsb(listerr, "NCYL LESS THAN NCG*CPG"); return (0); }
342 if (sblock.fs_sbsize > SBSIZE)
343 { badsb(listerr, "SIZE PREPOSTEROUSLY LARGE"); return (0); }
344 /*
345 * Compute block size that the filesystem is based on,
346 * according to fsbtodb, and adjust superblock block number
347 * so we can tell if this is an alternate later.
348 */
349 super *= dev_bsize;
350 dev_bsize = sblock.fs_fsize / fsbtodb(&sblock, 1);
351 sblk.b_bno = super / dev_bsize;
352 if (bflag) {
353 havesb = 1;
354 return (1);
355 }
356 /*
357 * Set all possible fields that could differ, then do check
358 * of whole super block against an alternate super block.
359 * When an alternate super-block is specified this check is skipped.
360 */
361 getblk(&asblk, cgsblock(&sblock, sblock.fs_ncg - 1), sblock.fs_sbsize);
362 if (asblk.b_errs)
363 return (0);
364 altsblock.fs_firstfield = sblock.fs_firstfield;
365 altsblock.fs_unused_1 = sblock.fs_unused_1;
366 altsblock.fs_time = sblock.fs_time;
367 altsblock.fs_cstotal = sblock.fs_cstotal;
368 altsblock.fs_cgrotor = sblock.fs_cgrotor;
369 altsblock.fs_fmod = sblock.fs_fmod;
370 altsblock.fs_clean = sblock.fs_clean;
371 altsblock.fs_ronly = sblock.fs_ronly;
372 altsblock.fs_flags = sblock.fs_flags;
373 altsblock.fs_maxcontig = sblock.fs_maxcontig;
374 altsblock.fs_minfree = sblock.fs_minfree;
375 altsblock.fs_optim = sblock.fs_optim;
376 altsblock.fs_rotdelay = sblock.fs_rotdelay;
377 altsblock.fs_maxbpg = sblock.fs_maxbpg;
378 memmove(altsblock.fs_csp, sblock.fs_csp, sizeof sblock.fs_csp);
379 altsblock.fs_maxcluster = sblock.fs_maxcluster;
380 memmove(altsblock.fs_fsmnt, sblock.fs_fsmnt, sizeof sblock.fs_fsmnt);
381 memmove(altsblock.fs_sparecon,
382 sblock.fs_sparecon, sizeof sblock.fs_sparecon);
383 /*
384 * The following should not have to be copied.
385 */
386 altsblock.fs_fsbtodb = sblock.fs_fsbtodb;
387 altsblock.fs_interleave = sblock.fs_interleave;
388 altsblock.fs_npsect = sblock.fs_npsect;
389 altsblock.fs_nrpos = sblock.fs_nrpos;
390 altsblock.fs_state = sblock.fs_state;
391 altsblock.fs_qbmask = sblock.fs_qbmask;
392 altsblock.fs_qfmask = sblock.fs_qfmask;
393 altsblock.fs_state = sblock.fs_state;
394 altsblock.fs_maxfilesize = sblock.fs_maxfilesize;
395 if (memcmp(&sblock, &altsblock, (int)sblock.fs_sbsize)) {
396 if (debug) {
397 long *nlp, *olp, *endlp;
398
399 printf("superblock mismatches\n");
400 nlp = (long *)&altsblock;
401 olp = (long *)&sblock;
402 endlp = olp + (sblock.fs_sbsize / sizeof *olp);
403 for ( ; olp < endlp; olp++, nlp++) {
404 if (*olp == *nlp)
405 continue;
406 printf("offset %d, original %d, alternate %d\n",
407 olp - (long *)&sblock, *olp, *nlp);
408 }
409 }
410 badsb(listerr,
411 "VALUES IN SUPER BLOCK DISAGREE WITH THOSE IN FIRST ALTERNATE");
412 return (0);
413 }
414 havesb = 1;
415 return (1);
416}
417
418static void
419badsb(listerr, s)
420 int listerr;
421 char *s;
422{
423
424 if (!listerr)
425 return;
426 if (preen)
427 printf("%s: ", cdevname);
428 pfatal("BAD SUPER BLOCK: %s\n", s);
429}
430
431/*
432 * Calculate a prototype superblock based on information in the disk label.
433 * When done the cgsblock macro can be calculated and the fs_ncg field
434 * can be used. Do NOT attempt to use other macros without verifying that
435 * their needed information is available!
436 */
437static int
438calcsb(dev, devfd, fs)
439 char *dev;
440 int devfd;
441 register struct fs *fs;
442{
443 register struct disklabel *lp;
444 register struct partition *pp;
445 register char *cp;
446 int i;
447
448 cp = strchr(dev, '\0') - 1;
449 if (cp == (char *)-1 || ((*cp < 'a' || *cp > 'h') && !isdigit(*cp))) {
450 pfatal("%s: CANNOT FIGURE OUT FILE SYSTEM PARTITION\n", dev);
451 return (0);
452 }
453 lp = getdisklabel(dev, devfd);
454 if (isdigit(*cp))
455 pp = &lp->d_partitions[0];
456 else
457 pp = &lp->d_partitions[*cp - 'a'];
458 if (pp->p_fstype != FS_BSDFFS) {
459 pfatal("%s: NOT LABELED AS A BSD FILE SYSTEM (%s)\n",
460 dev, pp->p_fstype < FSMAXTYPES ?
461 fstypenames[pp->p_fstype] : "unknown");
462 return (0);
463 }
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