setup.c revision 1.93 1 /* $NetBSD: setup.c,v 1.93 2011/06/09 19:57:52 christos Exp $ */
2
3 /*
4 * Copyright (c) 1980, 1986, 1993
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. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32 #include <sys/cdefs.h>
33 #ifndef lint
34 #if 0
35 static char sccsid[] = "@(#)setup.c 8.10 (Berkeley) 5/9/95";
36 #else
37 __RCSID("$NetBSD: setup.c,v 1.93 2011/06/09 19:57:52 christos Exp $");
38 #endif
39 #endif /* not lint */
40
41 #include <sys/param.h>
42 #include <sys/time.h>
43 #include <sys/stat.h>
44 #include <sys/ioctl.h>
45 #include <sys/file.h>
46 #include <sys/disk.h>
47
48 #include <ufs/ufs/dinode.h>
49 #include <ufs/ufs/dir.h>
50 #include <ufs/ufs/ufs_bswap.h>
51 #include <ufs/ufs/quota2.h>
52 #include <ufs/ffs/fs.h>
53 #include <ufs/ffs/ffs_extern.h>
54
55 #include <ctype.h>
56 #include <err.h>
57 #include <errno.h>
58 #include <stdio.h>
59 #include <stdlib.h>
60 #include <string.h>
61
62 #include "fsck.h"
63 #include "extern.h"
64 #include "fsutil.h"
65 #include "partutil.h"
66 #include "exitvalues.h"
67
68 #define POWEROF2(num) (((num) & ((num) - 1)) == 0)
69
70 static void badsb(int, const char *);
71 static int calcsb(const char *, int, struct fs *);
72 static int readsb(int);
73 static int readappleufs(void);
74
75 int16_t sblkpostbl[256];
76
77 /*
78 * Read in a superblock finding an alternate if necessary.
79 * Return 1 if successful, 0 if unsuccessful, -1 if filesystem
80 * is already clean (preen mode only).
81 */
82 int
83 setup(const char *dev, const char *origdev)
84 {
85 long cg, size, asked, i, j;
86 long bmapsize;
87 struct disk_geom geo;
88 struct dkwedge_info dkw;
89 off_t sizepb;
90 struct stat statb;
91 struct fs proto;
92 int doskipclean;
93 u_int64_t maxfilesize;
94 struct csum *ccsp;
95 int fd;
96
97 havesb = 0;
98 fswritefd = -1;
99 doskipclean = skipclean;
100 if (stat(dev, &statb) < 0) {
101 printf("Can't stat %s: %s\n", dev, strerror(errno));
102 return (0);
103 }
104 if (!forceimage && !S_ISCHR(statb.st_mode)) {
105 pfatal("%s is not a character device", dev);
106 if (reply("CONTINUE") == 0)
107 return (0);
108 }
109 if ((fsreadfd = open(dev, O_RDONLY)) < 0) {
110 printf("Can't open %s: %s\n", dev, strerror(errno));
111 return (0);
112 }
113 if (nflag || (fswritefd = open(dev, O_WRONLY)) < 0) {
114 fswritefd = -1;
115 if (preen)
116 pfatal("NO WRITE ACCESS");
117 printf("** %s (NO WRITE)\n", dev);
118 quiet = 0;
119 } else
120 if (!preen && !quiet)
121 printf("** %s\n", dev);
122 fsmodified = 0;
123 lfdir = 0;
124 initbarea(&sblk);
125 initbarea(&asblk);
126 sblk.b_un.b_buf = malloc(SBLOCKSIZE);
127 sblock = malloc(SBLOCKSIZE);
128 asblk.b_un.b_buf = malloc(SBLOCKSIZE);
129 altsblock = malloc(SBLOCKSIZE);
130 if (sblk.b_un.b_buf == NULL || asblk.b_un.b_buf == NULL ||
131 sblock == NULL || altsblock == NULL)
132 errexit("Cannot allocate space for superblock");
133 if (strcmp(dev, origdev) && !forceimage) {
134 /*
135 * dev isn't the original fs (for example it's a snapshot)
136 * do getdiskinfo on the original device
137 */
138 fd = open(origdev, O_RDONLY);
139 if (fd < 0) {
140 warn("Can't open %s", origdev);
141 return (0);
142 }
143 } else {
144 fd = fsreadfd;
145 }
146 if (!forceimage && getdiskinfo(origdev, fd, NULL, &geo, &dkw) != -1)
147 dev_bsize = secsize = geo.dg_secsize;
148 else
149 dev_bsize = secsize = DEV_BSIZE;
150 /*
151 * Read in the superblock, looking for alternates if necessary
152 */
153 if (readsb(1) == 0) {
154 if (bflag || preen || forceimage ||
155 calcsb(dev, fsreadfd, &proto) == 0)
156 return(0);
157 if (reply("LOOK FOR ALTERNATE SUPERBLOCKS") == 0)
158 return (0);
159 for (cg = 0; cg < proto.fs_ncg; cg++) {
160 bflag = fsbtodb(&proto, cgsblock(&proto, cg));
161 if (readsb(0) != 0)
162 break;
163 }
164 if (cg >= proto.fs_ncg) {
165 printf("%s %s\n%s %s\n%s %s\n",
166 "SEARCH FOR ALTERNATE SUPER-BLOCK",
167 "FAILED. YOU MUST USE THE",
168 "-b OPTION TO fsck_ffs TO SPECIFY THE",
169 "LOCATION OF AN ALTERNATE",
170 "SUPER-BLOCK TO SUPPLY NEEDED",
171 "INFORMATION; SEE fsck_ffs(8).");
172 return(0);
173 }
174 doskipclean = 0;
175 pwarn("USING ALTERNATE SUPERBLOCK AT %d\n", bflag);
176 }
177
178 if (!quota2_check_doquota())
179 doskipclean = 0;
180
181 /* ffs_superblock_layout() == 2 */
182 if (sblock->fs_magic != FS_UFS1_MAGIC ||
183 (sblock->fs_old_flags & FS_FLAGS_UPDATED) != 0) {
184 /* can have WAPBL */
185 if (check_wapbl() != 0) {
186 doskipclean = 0;
187 }
188 if (sblock->fs_flags & FS_DOWAPBL) {
189 if (preen && doskipclean) {
190 if (!quiet)
191 pwarn("file system is journaled; "
192 "not checking\n");
193 return (-1);
194 }
195 if (!quiet)
196 pwarn("** File system is journaled; "
197 "replaying journal\n");
198 replay_wapbl();
199 doskipclean = 0;
200 sblock->fs_flags &= ~FS_DOWAPBL;
201 sbdirty();
202 /* Although we may have updated the superblock from
203 * the journal, we are still going to do a full check,
204 * so we don't bother to re-read the superblock from
205 * the journal.
206 * XXX, instead we could re-read the superblock and
207 * then not force doskipclean = 0
208 */
209 }
210 }
211 if (debug)
212 printf("clean = %d\n", sblock->fs_clean);
213
214 if (doswap)
215 doskipclean = 0;
216
217 if (sblock->fs_clean & FS_ISCLEAN) {
218 if (doskipclean) {
219 if (!quiet)
220 pwarn("%sile system is clean; not checking\n",
221 preen ? "f" : "** F");
222 return (-1);
223 }
224 if (!preen && !doswap)
225 pwarn("** File system is already clean\n");
226 }
227 maxfsblock = sblock->fs_size;
228 maxino = sblock->fs_ncg * sblock->fs_ipg;
229 sizepb = sblock->fs_bsize;
230 maxfilesize = sblock->fs_bsize * NDADDR - 1;
231 for (i = 0; i < NIADDR; i++) {
232 sizepb *= NINDIR(sblock);
233 maxfilesize += sizepb;
234 }
235 if ((!is_ufs2 && cvtlevel >= 4) &&
236 (sblock->fs_old_flags & FS_FLAGS_UPDATED) == 0) {
237 if (preen)
238 pwarn("CONVERTING TO NEW SUPERBLOCK LAYOUT\n");
239 else if (!reply("CONVERT TO NEW SUPERBLOCK LAYOUT"))
240 return(0);
241 sblock->fs_old_flags |= FS_FLAGS_UPDATED;
242 /* Disable the postbl tables */
243 sblock->fs_old_cpc = 0;
244 sblock->fs_old_nrpos = 1;
245 sblock->fs_old_trackskew = 0;
246 /* The other fields have already been updated by
247 * sb_oldfscompat_read
248 */
249 sbdirty();
250 }
251 if (!is_ufs2 && cvtlevel == 3 &&
252 (sblock->fs_old_flags & FS_FLAGS_UPDATED)) {
253 if (preen)
254 pwarn("DOWNGRADING TO OLD SUPERBLOCK LAYOUT\n");
255 else if (!reply("DOWNGRADE TO OLD SUPERBLOCK LAYOUT"))
256 return(0);
257 sblock->fs_old_flags &= ~FS_FLAGS_UPDATED;
258 sb_oldfscompat_write(sblock, sblock);
259 sblock->fs_old_flags &= ~FS_FLAGS_UPDATED; /* just in case */
260 /* Leave postbl tables disabled, but blank its superblock region anyway */
261 sblock->fs_old_postblformat = FS_DYNAMICPOSTBLFMT;
262 sblock->fs_old_cpc = 0;
263 sblock->fs_old_nrpos = 1;
264 sblock->fs_old_trackskew = 0;
265 memset(&sblock->fs_old_postbl_start, 0xff, 256);
266 sb_oldfscompat_read(sblock, &sblocksave);
267 sbdirty();
268 }
269 /*
270 * Check and potentially fix certain fields in the super block.
271 */
272 if (sblock->fs_flags & ~(FS_KNOWN_FLAGS)) {
273 pfatal("UNKNOWN FLAGS=0x%08x IN SUPERBLOCK", sblock->fs_flags);
274 if (reply("CLEAR") == 1) {
275 sblock->fs_flags &= FS_KNOWN_FLAGS;
276 sbdirty();
277 }
278 }
279 if (sblock->fs_optim != FS_OPTTIME && sblock->fs_optim != FS_OPTSPACE) {
280 pfatal("UNDEFINED OPTIMIZATION IN SUPERBLOCK");
281 if (reply("SET TO DEFAULT") == 1) {
282 sblock->fs_optim = FS_OPTTIME;
283 sbdirty();
284 }
285 }
286 if ((sblock->fs_minfree < 0 || sblock->fs_minfree > 99)) {
287 pfatal("IMPOSSIBLE MINFREE=%d IN SUPERBLOCK",
288 sblock->fs_minfree);
289 if (reply("SET TO DEFAULT") == 1) {
290 sblock->fs_minfree = 10;
291 sbdirty();
292 }
293 }
294 if (!is_ufs2 && sblock->fs_old_postblformat != FS_42POSTBLFMT &&
295 (sblock->fs_old_interleave < 1 ||
296 sblock->fs_old_interleave > sblock->fs_old_nsect)) {
297 pwarn("IMPOSSIBLE INTERLEAVE=%d IN SUPERBLOCK",
298 sblock->fs_old_interleave);
299 sblock->fs_old_interleave = 1;
300 if (preen)
301 printf(" (FIXED)\n");
302 if (preen || reply("SET TO DEFAULT") == 1) {
303 sbdirty();
304 dirty(&asblk);
305 }
306 }
307 if (!is_ufs2 && sblock->fs_old_postblformat != FS_42POSTBLFMT &&
308 (sblock->fs_old_npsect < sblock->fs_old_nsect ||
309 sblock->fs_old_npsect > sblock->fs_old_nsect*2)) {
310 pwarn("IMPOSSIBLE NPSECT=%d IN SUPERBLOCK",
311 sblock->fs_old_npsect);
312 sblock->fs_old_npsect = sblock->fs_old_nsect;
313 if (preen)
314 printf(" (FIXED)\n");
315 if (preen || reply("SET TO DEFAULT") == 1) {
316 sbdirty();
317 dirty(&asblk);
318 }
319 }
320 if (sblock->fs_bmask != ~(sblock->fs_bsize - 1)) {
321 pwarn("INCORRECT BMASK=0x%x IN SUPERBLOCK",
322 sblock->fs_bmask);
323 sblock->fs_bmask = ~(sblock->fs_bsize - 1);
324 if (preen)
325 printf(" (FIXED)\n");
326 if (preen || reply("FIX") == 1) {
327 sbdirty();
328 dirty(&asblk);
329 }
330 }
331 if (sblock->fs_fmask != ~(sblock->fs_fsize - 1)) {
332 pwarn("INCORRECT FMASK=0x%x IN SUPERBLOCK",
333 sblock->fs_fmask);
334 sblock->fs_fmask = ~(sblock->fs_fsize - 1);
335 if (preen)
336 printf(" (FIXED)\n");
337 if (preen || reply("FIX") == 1) {
338 sbdirty();
339 dirty(&asblk);
340 }
341 }
342 if (is_ufs2 || sblock->fs_old_inodefmt >= FS_44INODEFMT) {
343 if (sblock->fs_maxfilesize != maxfilesize) {
344 pwarn("INCORRECT MAXFILESIZE=%lld IN SUPERBLOCK",
345 (unsigned long long)sblock->fs_maxfilesize);
346 sblock->fs_maxfilesize = maxfilesize;
347 if (preen)
348 printf(" (FIXED)\n");
349 if (preen || reply("FIX") == 1) {
350 sbdirty();
351 dirty(&asblk);
352 }
353 }
354 if ((is_ufs2 && sblock->fs_maxsymlinklen != MAXSYMLINKLEN_UFS2)
355 ||
356 (!is_ufs2 && sblock->fs_maxsymlinklen != MAXSYMLINKLEN_UFS1))
357 {
358 pwarn("INCORRECT MAXSYMLINKLEN=%d IN SUPERBLOCK",
359 sblock->fs_maxsymlinklen);
360 sblock->fs_maxsymlinklen = is_ufs2 ?
361 MAXSYMLINKLEN_UFS2 : MAXSYMLINKLEN_UFS1;
362 if (preen)
363 printf(" (FIXED)\n");
364 if (preen || reply("FIX") == 1) {
365 sbdirty();
366 dirty(&asblk);
367 }
368 }
369 if (sblock->fs_qbmask != ~sblock->fs_bmask) {
370 pwarn("INCORRECT QBMASK=%#llx IN SUPERBLOCK",
371 (unsigned long long)sblock->fs_qbmask);
372 sblock->fs_qbmask = ~sblock->fs_bmask;
373 if (preen)
374 printf(" (FIXED)\n");
375 if (preen || reply("FIX") == 1) {
376 sbdirty();
377 dirty(&asblk);
378 }
379 }
380 if (sblock->fs_qfmask != ~sblock->fs_fmask) {
381 pwarn("INCORRECT QFMASK=%#llx IN SUPERBLOCK",
382 (unsigned long long)sblock->fs_qfmask);
383 sblock->fs_qfmask = ~sblock->fs_fmask;
384 if (preen)
385 printf(" (FIXED)\n");
386 if (preen || reply("FIX") == 1) {
387 sbdirty();
388 dirty(&asblk);
389 }
390 }
391 newinofmt = 1;
392 } else {
393 sblock->fs_qbmask = ~sblock->fs_bmask;
394 sblock->fs_qfmask = ~sblock->fs_fmask;
395 newinofmt = 0;
396 }
397 /*
398 * Convert to new inode format.
399 */
400 if (!is_ufs2 && cvtlevel >= 2 &&
401 sblock->fs_old_inodefmt < FS_44INODEFMT) {
402 if (preen)
403 pwarn("CONVERTING TO NEW INODE FORMAT\n");
404 else if (!reply("CONVERT TO NEW INODE FORMAT"))
405 return(0);
406 doinglevel2++;
407 sblock->fs_old_inodefmt = FS_44INODEFMT;
408 sblock->fs_maxfilesize = maxfilesize;
409 sblock->fs_maxsymlinklen = MAXSYMLINKLEN_UFS1;
410 sblock->fs_qbmask = ~sblock->fs_bmask;
411 sblock->fs_qfmask = ~sblock->fs_fmask;
412 sbdirty();
413 dirty(&asblk);
414 }
415 /*
416 * Convert to new cylinder group format.
417 */
418 if (!is_ufs2 && cvtlevel >= 1 &&
419 sblock->fs_old_postblformat == FS_42POSTBLFMT) {
420 if (preen)
421 pwarn("CONVERTING TO NEW CYLINDER GROUP FORMAT\n");
422 else if (!reply("CONVERT TO NEW CYLINDER GROUP FORMAT"))
423 return(0);
424 doinglevel1++;
425 sblock->fs_old_postblformat = FS_DYNAMICPOSTBLFMT;
426 sblock->fs_old_nrpos = 8;
427 sblock->fs_old_postbloff =
428 (char *)(&sblock->fs_old_postbl_start) -
429 (char *)(&sblock->fs_firstfield);
430 sblock->fs_old_rotbloff =
431 (char *)(&sblock->fs_magic+1) -
432 (char *)(&sblock->fs_firstfield);
433 sblock->fs_cgsize =
434 fragroundup(sblock, CGSIZE(sblock));
435 sbdirty();
436 dirty(&asblk);
437 }
438 if (asblk.b_dirty && !bflag) {
439 memmove(sblk.b_un.b_fs, sblock, SBLOCKSIZE);
440 sb_oldfscompat_write(sblk.b_un.b_fs, sblocksave);
441 if (needswap)
442 ffs_sb_swap(sblk.b_un.b_fs, sblk.b_un.b_fs);
443 memmove(asblk.b_un.b_fs, sblk.b_un.b_fs, (size_t)sblock->fs_sbsize);
444 flush(fswritefd, &asblk);
445 }
446 /*
447 * read in the summary info.
448 */
449 asked = 0;
450 sblock->fs_csp = (struct csum *)calloc(1, sblock->fs_cssize);
451 if (sblock->fs_csp == NULL) {
452 pwarn("cannot alloc %u bytes for summary info\n",
453 sblock->fs_cssize);
454 goto badsblabel;
455 }
456 for (i = 0, j = 0; i < sblock->fs_cssize; i += sblock->fs_bsize, j++) {
457 size = sblock->fs_cssize - i < sblock->fs_bsize ?
458 sblock->fs_cssize - i : sblock->fs_bsize;
459 ccsp = (struct csum *)((char *)sblock->fs_csp + i);
460 if (bread(fsreadfd, (char *)ccsp,
461 fsbtodb(sblock, sblock->fs_csaddr + j * sblock->fs_frag),
462 size) != 0 && !asked) {
463 pfatal("BAD SUMMARY INFORMATION");
464 if (reply("CONTINUE") == 0) {
465 markclean = 0;
466 exit(FSCK_EXIT_CHECK_FAILED);
467 }
468 asked++;
469 }
470 if (doswap) {
471 ffs_csum_swap(ccsp, ccsp, size);
472 bwrite(fswritefd, (char *)ccsp,
473 fsbtodb(sblock,
474 sblock->fs_csaddr + j * sblock->fs_frag),
475 size);
476 }
477 if (needswap)
478 ffs_csum_swap(ccsp, ccsp, size);
479 }
480 /*
481 * allocate and initialize the necessary maps
482 */
483 bmapsize = roundup(howmany(maxfsblock, NBBY), sizeof(int16_t));
484 blockmap = calloc((unsigned)bmapsize, sizeof (char));
485 if (blockmap == NULL) {
486 pwarn("cannot alloc %u bytes for blockmap\n",
487 (unsigned)bmapsize);
488 goto badsblabel;
489 }
490 inostathead = calloc((unsigned)(sblock->fs_ncg),
491 sizeof(struct inostatlist));
492 if (inostathead == NULL) {
493 pwarn("cannot alloc %u bytes for inostathead\n",
494 (unsigned)(sizeof(struct inostatlist) * (sblock->fs_ncg)));
495 goto badsblabel;
496 }
497 /*
498 * cs_ndir may be inaccurate, particularly if we're using the -b
499 * option, so set a minimum to prevent bogus subdirectory reconnects
500 * and really inefficient directory scans.
501 * Also set a maximum in case the value is too large.
502 */
503 numdirs = sblock->fs_cstotal.cs_ndir;
504 if (numdirs < 1024)
505 numdirs = 1024;
506 if (numdirs > maxino + 1)
507 numdirs = maxino + 1;
508 dirhash = numdirs;
509 inplast = 0;
510 listmax = numdirs + 10;
511 inpsort = (struct inoinfo **)calloc((unsigned)listmax,
512 sizeof(struct inoinfo *));
513 inphead = (struct inoinfo **)calloc((unsigned)numdirs,
514 sizeof(struct inoinfo *));
515 if (inpsort == NULL || inphead == NULL) {
516 pwarn("cannot alloc %u bytes for inphead\n",
517 (unsigned)(numdirs * sizeof(struct inoinfo *)));
518 goto badsblabel;
519 }
520 cgrp = malloc(sblock->fs_cgsize);
521 if (cgrp == NULL) {
522 pwarn("cannot alloc %u bytes for cylinder group\n",
523 sblock->fs_cgsize);
524 goto badsblabel;
525 }
526 bufinit();
527 if (sblock->fs_flags & FS_DOSOFTDEP)
528 usedsoftdep = 1;
529 else
530 usedsoftdep = 0;
531
532 if (!forceimage && dkw.dkw_parent[0])
533 if (strcmp(dkw.dkw_ptype, DKW_PTYPE_APPLEUFS) == 0)
534 isappleufs = 1;
535
536 if (readappleufs())
537 isappleufs = 1;
538
539 dirblksiz = DIRBLKSIZ;
540 if (isappleufs)
541 dirblksiz = APPLEUFS_DIRBLKSIZ;
542
543 if (debug)
544 printf("isappleufs = %d, dirblksiz = %d\n", isappleufs, dirblksiz);
545
546 if (sblock->fs_flags & FS_DOQUOTA2) {
547 /* allocate the quota hash table */
548 /*
549 * first compute the size of the hash table
550 * We know the smallest block size is 4k, so we can use 2k
551 * for the hash table; as an entry is 8 bytes we can store
552 * 256 entries. So let start q2h_hash_shift at 8
553 */
554 for (q2h_hash_shift = 8;
555 q2h_hash_shift < 15;
556 q2h_hash_shift++) {
557 if ((sizeof(uint64_t) << (q2h_hash_shift + 1)) +
558 sizeof(struct quota2_header) > sblock->fs_bsize)
559 break;
560 }
561 q2h_hash_mask = (1 << q2h_hash_shift) - 1;
562 if (debug) {
563 printf("quota hash shift %d, %d entries, mask 0x%x\n",
564 q2h_hash_shift, (1 << q2h_hash_shift),
565 q2h_hash_mask);
566 }
567 uquot_user_hash =
568 calloc((1 << q2h_hash_shift), sizeof(struct uquot_hash));
569 uquot_group_hash =
570 calloc((1 << q2h_hash_shift), sizeof(struct uquot_hash));
571 if (uquot_user_hash == NULL || uquot_group_hash == NULL)
572 errexit("Cannot allocate space for quotas hash\n");
573 } else {
574 uquot_user_hash = uquot_group_hash = NULL;
575 q2h_hash_shift = q2h_hash_mask = 0;
576 }
577 return (1);
578 badsblabel:
579 markclean=0;
580 ckfini(1);
581 return (0);
582 }
583
584 static int
585 readappleufs(void)
586 {
587 daddr_t label = APPLEUFS_LABEL_OFFSET / dev_bsize;
588 struct appleufslabel *appleufs;
589 int i;
590
591 /* XXX do we have to deal with APPLEUFS_LABEL_OFFSET not
592 * being block aligned (CD's?)
593 */
594 if (APPLEUFS_LABEL_SIZE % dev_bsize != 0)
595 return 0;
596 if (bread(fsreadfd, (char *)appleufsblk.b_un.b_fs, label,
597 (long)APPLEUFS_LABEL_SIZE) != 0)
598 return 0;
599 appleufsblk.b_bno = label;
600 appleufsblk.b_size = APPLEUFS_LABEL_SIZE;
601
602 appleufs = appleufsblk.b_un.b_appleufs;
603
604 if (ntohl(appleufs->ul_magic) != APPLEUFS_LABEL_MAGIC) {
605 if (!isappleufs) {
606 return 0;
607 } else {
608 pfatal("MISSING APPLEUFS VOLUME LABEL\n");
609 if (reply("FIX") == 0) {
610 return 1;
611 }
612 ffs_appleufs_set(appleufs, NULL, -1, 0);
613 appleufsdirty();
614 }
615 }
616
617 if (ntohl(appleufs->ul_version) != APPLEUFS_LABEL_VERSION) {
618 pwarn("INCORRECT APPLE UFS VERSION NUMBER (%d should be %d)",
619 ntohl(appleufs->ul_version),APPLEUFS_LABEL_VERSION);
620 if (preen) {
621 printf(" (CORRECTED)\n");
622 }
623 if (preen || reply("CORRECT")) {
624 appleufs->ul_version = htonl(APPLEUFS_LABEL_VERSION);
625 appleufsdirty();
626 }
627 }
628
629 if (ntohs(appleufs->ul_namelen) > APPLEUFS_MAX_LABEL_NAME) {
630 pwarn("APPLE UFS LABEL NAME TOO LONG");
631 if (preen) {
632 printf(" (TRUNCATED)\n");
633 }
634 if (preen || reply("TRUNCATE")) {
635 appleufs->ul_namelen = htons(APPLEUFS_MAX_LABEL_NAME);
636 appleufsdirty();
637 }
638 }
639
640 if (ntohs(appleufs->ul_namelen) == 0) {
641 pwarn("MISSING APPLE UFS LABEL NAME");
642 if (preen) {
643 printf(" (FIXED)\n");
644 }
645 if (preen || reply("FIX")) {
646 ffs_appleufs_set(appleufs, NULL, -1, 0);
647 appleufsdirty();
648 }
649 }
650
651 /* Scan name for first illegal character */
652 for (i=0;i<ntohs(appleufs->ul_namelen);i++) {
653 if ((appleufs->ul_name[i] == '\0') ||
654 (appleufs->ul_name[i] == ':') ||
655 (appleufs->ul_name[i] == '/')) {
656 pwarn("APPLE UFS LABEL NAME CONTAINS ILLEGAL CHARACTER");
657 if (preen) {
658 printf(" (TRUNCATED)\n");
659 }
660 if (preen || reply("TRUNCATE")) {
661 appleufs->ul_namelen = i+1;
662 appleufsdirty();
663 }
664 break;
665 }
666 }
667
668 /* Check the checksum last, because if anything else was wrong,
669 * then the checksum gets reset anyway.
670 */
671 appleufs->ul_checksum = 0;
672 appleufs->ul_checksum = ffs_appleufs_cksum(appleufs);
673 if (appleufsblk.b_un.b_appleufs->ul_checksum != appleufs->ul_checksum) {
674 pwarn("INVALID APPLE UFS CHECKSUM (%#04x should be %#04x)",
675 appleufsblk.b_un.b_appleufs->ul_checksum, appleufs->ul_checksum);
676 if (preen) {
677 printf(" (CORRECTED)\n");
678 }
679 if (preen || reply("CORRECT")) {
680 appleufsdirty();
681 } else {
682 /* put the incorrect checksum back in place */
683 appleufs->ul_checksum = appleufsblk.b_un.b_appleufs->ul_checksum;
684 }
685 }
686 return 1;
687 }
688
689 /*
690 * Detect byte order. Return 0 if valid magic found, -1 otherwise.
691 */
692 static int
693 detect_byteorder(struct fs *fs, int sblockoff)
694 {
695 if (sblockoff == SBLOCK_UFS2 && (fs->fs_magic == FS_UFS1_MAGIC ||
696 fs->fs_magic == bswap32(FS_UFS1_MAGIC)))
697 /* Likely to be the first alternate of a fs with 64k blocks */
698 return -1;
699 if (fs->fs_magic == FS_UFS1_MAGIC || fs->fs_magic == FS_UFS2_MAGIC) {
700 if (endian == 0 || BYTE_ORDER == endian) {
701 needswap = 0;
702 doswap = do_blkswap = do_dirswap = 0;
703 } else {
704 needswap = 1;
705 doswap = do_blkswap = do_dirswap = 1;
706 }
707 return 0;
708 } else if (fs->fs_magic == bswap32(FS_UFS1_MAGIC) ||
709 fs->fs_magic == bswap32(FS_UFS2_MAGIC)) {
710 if (endian == 0 || BYTE_ORDER != endian) {
711 needswap = 1;
712 doswap = do_blkswap = do_dirswap = 0;
713 } else {
714 needswap = 0;
715 doswap = do_blkswap = do_dirswap = 1;
716 }
717 return 0;
718 }
719 return -1;
720 }
721
722 /*
723 * Possible superblock locations ordered from most to least likely.
724 */
725 static off_t sblock_try[] = SBLOCKSEARCH;
726
727 /*
728 * Read in the super block and its summary info.
729 */
730 static int
731 readsb(int listerr)
732 {
733 daddr_t super = 0;
734 struct fs *fs;
735 int i;
736
737 if (bflag) {
738 super = bflag;
739 if (bread(fsreadfd, (char *)sblk.b_un.b_fs, super,
740 (long)SBLOCKSIZE) != 0)
741 return (0);
742 fs = sblk.b_un.b_fs;
743 if (detect_byteorder(fs, -1) < 0) {
744 badsb(listerr, "MAGIC NUMBER WRONG");
745 return (0);
746 }
747 } else {
748 for (i = 0; sblock_try[i] != -1; i++) {
749 super = sblock_try[i] / dev_bsize;
750 if (bread(fsreadfd, (char *)sblk.b_un.b_fs,
751 super, (long)SBLOCKSIZE) != 0)
752 continue;
753 fs = sblk.b_un.b_fs;
754 if (detect_byteorder(fs, sblock_try[i]) == 0)
755 break;
756 }
757 if (sblock_try[i] == -1) {
758 badsb(listerr, "CAN'T FIND SUPERBLOCK");
759 return (0);
760 }
761 }
762 if (doswap) {
763 if (preen)
764 errx(FSCK_EXIT_USAGE,
765 "Incompatible options -B and -p");
766 if (nflag)
767 errx(FSCK_EXIT_USAGE,
768 "Incompatible options -B and -n");
769 if (endian == LITTLE_ENDIAN) {
770 if (!reply("CONVERT TO LITTLE ENDIAN"))
771 return 0;
772 } else if (endian == BIG_ENDIAN) {
773 if (!reply("CONVERT TO BIG ENDIAN"))
774 return 0;
775 } else
776 pfatal("INTERNAL ERROR: unknown endian");
777 }
778 if (needswap)
779 pwarn("** Swapped byte order\n");
780 /* swap SB byte order if asked */
781 if (doswap)
782 ffs_sb_swap(sblk.b_un.b_fs, sblk.b_un.b_fs);
783
784 memmove(sblock, sblk.b_un.b_fs, SBLOCKSIZE);
785 if (needswap)
786 ffs_sb_swap(sblk.b_un.b_fs, sblock);
787
788 is_ufs2 = sblock->fs_magic == FS_UFS2_MAGIC;
789
790 /*
791 * run a few consistency checks of the super block
792 */
793 if (sblock->fs_sbsize > SBLOCKSIZE)
794 { badsb(listerr, "SIZE PREPOSTEROUSLY LARGE"); return (0); }
795 /*
796 * Compute block size that the filesystem is based on,
797 * according to fsbtodb, and adjust superblock block number
798 * so we can tell if this is an alternate later.
799 */
800 super *= dev_bsize;
801 dev_bsize = sblock->fs_fsize / fsbtodb(sblock, 1);
802 sblk.b_bno = super / dev_bsize;
803 sblk.b_size = SBLOCKSIZE;
804 if (bflag)
805 goto out;
806 /*
807 * Set all possible fields that could differ, then do check
808 * of whole super block against an alternate super block->
809 * When an alternate super-block is specified this check is skipped.
810 */
811 getblk(&asblk, cgsblock(sblock, sblock->fs_ncg - 1), sblock->fs_sbsize);
812 if (asblk.b_errs)
813 return (0);
814 /* swap SB byte order if asked */
815 if (doswap)
816 ffs_sb_swap(asblk.b_un.b_fs, asblk.b_un.b_fs);
817
818 memmove(altsblock, asblk.b_un.b_fs, sblock->fs_sbsize);
819 if (needswap)
820 ffs_sb_swap(asblk.b_un.b_fs, altsblock);
821 if (cmpsblks(sblock, altsblock)) {
822 if (debug) {
823 uint32_t *nlp, *olp, *endlp;
824
825 printf("superblock mismatches\n");
826 nlp = (uint32_t *)altsblock;
827 olp = (uint32_t *)sblock;
828 endlp = olp + (sblock->fs_sbsize / sizeof *olp);
829 for ( ; olp < endlp; olp++, nlp++) {
830 if (*olp == *nlp)
831 continue;
832 printf("offset %#x, original 0x%08x, alternate "
833 "0x%08x\n",
834 (int)((uint8_t *)olp-(uint8_t *)sblock),
835 *olp, *nlp);
836 }
837 }
838 badsb(listerr,
839 "VALUES IN SUPER BLOCK DISAGREE WITH THOSE IN FIRST ALTERNATE");
840 /*
841 return (0);
842 */
843 }
844 out:
845
846 sb_oldfscompat_read(sblock, &sblocksave);
847
848 /* Now we know the SB is valid, we can write it back if needed */
849 if (doswap) {
850 sbdirty();
851 dirty(&asblk);
852 }
853 havesb = 1;
854 return (1);
855 }
856
857 int
858 cmpsblks(const struct fs *sb, struct fs *asb)
859 {
860 if (!is_ufs2 && ((sb->fs_old_flags & FS_FLAGS_UPDATED) == 0)) {
861 if (sb->fs_old_postblformat < FS_DYNAMICPOSTBLFMT)
862 return cmpsblks42(sb, asb);
863 else
864 return cmpsblks44(sb, asb);
865 }
866 if (asb->fs_sblkno != sb->fs_sblkno ||
867 asb->fs_cblkno != sb->fs_cblkno ||
868 asb->fs_iblkno != sb->fs_iblkno ||
869 asb->fs_dblkno != sb->fs_dblkno ||
870 asb->fs_ncg != sb->fs_ncg ||
871 asb->fs_bsize != sb->fs_bsize ||
872 asb->fs_fsize != sb->fs_fsize ||
873 asb->fs_frag != sb->fs_frag ||
874 asb->fs_bmask != sb->fs_bmask ||
875 asb->fs_fmask != sb->fs_fmask ||
876 asb->fs_bshift != sb->fs_bshift ||
877 asb->fs_fshift != sb->fs_fshift ||
878 asb->fs_fragshift != sb->fs_fragshift ||
879 asb->fs_fsbtodb != sb->fs_fsbtodb ||
880 asb->fs_sbsize != sb->fs_sbsize ||
881 asb->fs_nindir != sb->fs_nindir ||
882 asb->fs_inopb != sb->fs_inopb ||
883 asb->fs_cssize != sb->fs_cssize ||
884 asb->fs_ipg != sb->fs_ipg ||
885 asb->fs_fpg != sb->fs_fpg ||
886 asb->fs_magic != sb->fs_magic)
887 return 1;
888 return 0;
889 }
890
891 /* BSD 4.2 performed the following superblock comparison
892 * It should correspond to FS_42POSTBLFMT
893 * (although note that in 4.2, the fs_old_postblformat
894 * field didn't exist and the corresponding bits are
895 * located near the end of the postbl itself, where they
896 * are not likely to be used.)
897 */
898 int
899 cmpsblks42(const struct fs *sb, struct fs *asb)
900 {
901 asb->fs_firstfield = sb->fs_firstfield; /* fs_link */
902 asb->fs_unused_1 = sb->fs_unused_1; /* fs_rlink */
903 asb->fs_old_time = sb->fs_old_time; /* fs_time */
904 asb->fs_old_cstotal = sb->fs_old_cstotal; /* fs_cstotal */
905 asb->fs_cgrotor = sb->fs_cgrotor;
906 asb->fs_fmod = sb->fs_fmod;
907 asb->fs_clean = sb->fs_clean;
908 asb->fs_ronly = sb->fs_ronly;
909 asb->fs_old_flags = sb->fs_old_flags;
910 asb->fs_maxcontig = sb->fs_maxcontig;
911 asb->fs_minfree = sb->fs_minfree;
912 asb->fs_old_rotdelay = sb->fs_old_rotdelay;
913 asb->fs_maxbpg = sb->fs_maxbpg;
914
915 /* The former fs_csp, totaling 128 bytes */
916 memmove(asb->fs_ocsp, sb->fs_ocsp, sizeof sb->fs_ocsp);
917 asb->fs_contigdirs = sb->fs_contigdirs;
918 asb->fs_csp = sb->fs_csp;
919 asb->fs_maxcluster = sb->fs_maxcluster;
920 asb->fs_active = sb->fs_active;
921
922 /* The former fs_fsmnt, totaling 512 bytes */
923 memmove(asb->fs_fsmnt, sb->fs_fsmnt, sizeof sb->fs_fsmnt);
924 memmove(asb->fs_volname, sb->fs_volname, sizeof sb->fs_volname);
925
926 return memcmp(sb, asb, sb->fs_sbsize);
927 }
928
929 /* BSD 4.4 performed the following superblock comparison
930 * This was used in NetBSD through 1.6.1
931 *
932 * Note that this implementation is destructive to asb.
933 */
934 int
935 cmpsblks44(const struct fs *sb, struct fs *asb)
936 {
937 /*
938 * "Copy fields which we don't care if they're different in the
939 * alternate superblocks, as they're either likely to be
940 * different because they're per-cylinder-group specific, or
941 * because they're transient details which are only maintained
942 * in the primary superblock."
943 */
944 asb->fs_firstfield = sb->fs_firstfield;
945 asb->fs_unused_1 = sb->fs_unused_1;
946 asb->fs_old_time = sb->fs_old_time;
947 asb->fs_old_cstotal = sb->fs_old_cstotal;
948 asb->fs_cgrotor = sb->fs_cgrotor;
949 asb->fs_fmod = sb->fs_fmod;
950 asb->fs_clean = sb->fs_clean;
951 asb->fs_ronly = sb->fs_ronly;
952 asb->fs_old_flags = sb->fs_old_flags;
953 asb->fs_maxcontig = sb->fs_maxcontig;
954 asb->fs_minfree = sb->fs_minfree;
955 asb->fs_optim = sb->fs_optim;
956 asb->fs_old_rotdelay = sb->fs_old_rotdelay;
957 asb->fs_maxbpg = sb->fs_maxbpg;
958
959 /* The former fs_csp and fs_maxcluster, totaling 128 bytes */
960 memmove(asb->fs_ocsp, sb->fs_ocsp, sizeof sb->fs_ocsp);
961 asb->fs_contigdirs = sb->fs_contigdirs;
962 asb->fs_csp = sb->fs_csp;
963 asb->fs_maxcluster = sb->fs_maxcluster;
964 asb->fs_active = sb->fs_active;
965
966 /* The former fs_fsmnt, totaling 512 bytes */
967 memmove(asb->fs_fsmnt, sb->fs_fsmnt, sizeof sb->fs_fsmnt);
968 memmove(asb->fs_volname, sb->fs_volname, sizeof sb->fs_volname);
969
970 /* The former fs_sparecon, totaling 200 bytes */
971 memmove(asb->fs_snapinum,
972 sb->fs_snapinum, sizeof sb->fs_snapinum);
973 asb->fs_avgfilesize = sb->fs_avgfilesize;
974 asb->fs_avgfpdir = sb->fs_avgfpdir;
975 asb->fs_save_cgsize = sb->fs_save_cgsize;
976 memmove(asb->fs_sparecon32,
977 sb->fs_sparecon32, sizeof sb->fs_sparecon32);
978 asb->fs_flags = sb->fs_flags;
979
980 /* Original comment:
981 * "The following should not have to be copied, but need to be."
982 */
983 asb->fs_fsbtodb = sb->fs_fsbtodb;
984 asb->fs_old_interleave = sb->fs_old_interleave;
985 asb->fs_old_npsect = sb->fs_old_npsect;
986 asb->fs_old_nrpos = sb->fs_old_nrpos;
987 asb->fs_state = sb->fs_state;
988 asb->fs_qbmask = sb->fs_qbmask;
989 asb->fs_qfmask = sb->fs_qfmask;
990 asb->fs_state = sb->fs_state;
991 asb->fs_maxfilesize = sb->fs_maxfilesize;
992
993 /*
994 * "Compare the superblocks, effectively checking every other
995 * field to see if they differ."
996 */
997 return memcmp(sb, asb, sb->fs_sbsize);
998 }
999
1000
1001 static void
1002 badsb(int listerr, const char *s)
1003 {
1004
1005 if (!listerr)
1006 return;
1007 if (preen)
1008 printf("%s: ", cdevname());
1009 pfatal("BAD SUPER BLOCK: %s\n", s);
1010 }
1011
1012 /*
1013 * Calculate a prototype superblock based on information in the disk label.
1014 * When done the cgsblock macro can be calculated and the fs_ncg field
1015 * can be used. Do NOT attempt to use other macros without verifying that
1016 * their needed information is available!
1017 */
1018 static int
1019 calcsb(const char *dev, int devfd, struct fs *fs)
1020 {
1021 struct dkwedge_info dkw;
1022 struct disk_geom geo;
1023 int i, nspf;
1024
1025 if (getdiskinfo(dev, fsreadfd, NULL, &geo, &dkw) == -1)
1026 pfatal("%s: CANNOT FIGURE OUT FILE SYSTEM PARTITION\n", dev);
1027 if (dkw.dkw_parent[0] == '\0') {
1028 pfatal("%s: CANNOT FIGURE OUT FILE SYSTEM PARTITION\n", dev);
1029 return (0);
1030 }
1031 if (strcmp(dkw.dkw_ptype, DKW_PTYPE_FFS) &&
1032 strcmp(dkw.dkw_ptype, DKW_PTYPE_APPLEUFS)) {
1033 pfatal("%s: NOT LABELED AS A BSD FILE SYSTEM (%s)\n",
1034 dev, dkw.dkw_ptype);
1035 return (0);
1036 }
1037 if (geo.dg_secsize == 0) {
1038 pfatal("%s: CANNOT FIGURE OUT SECTOR SIZE\n", dev);
1039 return 0;
1040 }
1041 if (geo.dg_secpercyl == 0) {
1042 pfatal("%s: CANNOT FIGURE OUT SECTORS PER CYLINDER\n", dev);
1043 return 0;
1044 }
1045 if (sblk.b_un.b_fs->fs_fsize == 0) {
1046 pfatal("%s: CANNOT FIGURE OUT FRAG BLOCK SIZE\n", dev);
1047 return 0;
1048 }
1049 if (sblk.b_un.b_fs->fs_fpg == 0) {
1050 pfatal("%s: CANNOT FIGURE OUT FRAGS PER GROUP\n", dev);
1051 return 0;
1052 }
1053 if (sblk.b_un.b_fs->fs_old_cpg == 0) {
1054 pfatal("%s: CANNOT FIGURE OUT OLD CYLINDERS PER GROUP\n", dev);
1055 return 0;
1056 }
1057 memcpy(fs, sblk.b_un.b_fs, sizeof(struct fs));
1058 nspf = fs->fs_fsize / geo.dg_secsize;
1059 fs->fs_old_nspf = nspf;
1060 for (fs->fs_fsbtodb = 0, i = nspf; i > 1; i >>= 1)
1061 fs->fs_fsbtodb++;
1062 dev_bsize = geo.dg_secsize;
1063 if (fs->fs_magic == FS_UFS2_MAGIC) {
1064 fs->fs_ncg = howmany(fs->fs_size, fs->fs_fpg);
1065 } else /* if (fs->fs_magic == FS_UFS1_MAGIC) */ {
1066 fs->fs_old_cgmask = 0xffffffff;
1067 for (i = geo.dg_ntracks; i > 1; i >>= 1)
1068 fs->fs_old_cgmask <<= 1;
1069 if (!POWEROF2(geo.dg_ntracks))
1070 fs->fs_old_cgmask <<= 1;
1071 fs->fs_old_cgoffset = roundup(
1072 howmany(geo.dg_nsectors, nspf), fs->fs_frag);
1073 fs->fs_fpg = (fs->fs_old_cpg * geo.dg_secpercyl) / nspf;
1074 fs->fs_ncg = howmany(fs->fs_size / geo.dg_secpercyl,
1075 fs->fs_old_cpg);
1076 }
1077 return (1);
1078 }
1079