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 <stdio.h>
53#include <stdlib.h>
54#include <string.h>
55
56#include "fsck.h"
57
58struct bufarea asblk;
59#define altsblock (*asblk.b_un.b_fs)
60#define POWEROF2(num) (((num) & ((num) - 1)) == 0)
61
62static void badsb __P((int listerr, char *s));
63static int calcsb __P((char *dev, int devfd, struct fs *fs));
64static struct disklabel *getdisklabel __P((char *s, int fd));
65static int readsb __P((int listerr));
66
67/*
68 * Read in a superblock finding an alternate if necessary.
69 * Return 1 if successful, 0 if unsuccessful, -1 if filesystem
70 * is already clean (preen mode only).
71 */
72int
73setup(dev)
74 char *dev;
75{
76 long cg, size, asked, i, j;
77 long skipclean, bmapsize;
78 struct disklabel *lp;
79 off_t sizepb;
80 struct stat statb;
81 struct fs proto;
82
83 havesb = 0;
84 fswritefd = -1;
85 skipclean = preen;
86 if (stat(dev, &statb) < 0) {
87 printf("Can't stat %s: %s\n", dev, strerror(errno));
88 return (0);
89 }
90 if ((statb.st_mode & S_IFMT) != S_IFCHR) {
91 pfatal("%s is not a character device", dev);
92 if (reply("CONTINUE") == 0)
93 return (0);
94 }
95 if ((fsreadfd = open(dev, O_RDONLY)) < 0) {
96 printf("Can't open %s: %s\n", dev, strerror(errno));
97 return (0);
98 }
99 if (preen == 0)
100 printf("** %s", dev);
101 if (nflag || (fswritefd = open(dev, O_WRONLY)) < 0) {
102 fswritefd = -1;
103 if (preen)
104 pfatal("NO WRITE ACCESS");
105 printf(" (NO WRITE)");
106 }
107 if (preen == 0)
108 printf("\n");
109 fsmodified = 0;
110 lfdir = 0;
111 initbarea(&sblk);
112 initbarea(&asblk);
113 sblk.b_un.b_buf = malloc(SBSIZE);
114 asblk.b_un.b_buf = malloc(SBSIZE);
115 if (sblk.b_un.b_buf == NULL || asblk.b_un.b_buf == NULL)
116 errx(EEXIT, "cannot allocate space for superblock");
117 lp = getdisklabel((char *)NULL, fsreadfd);
118 if (lp)
119 dev_bsize = secsize = lp->d_secsize;
120 else
121 dev_bsize = secsize = DEV_BSIZE;
122 /*
123 * Read in the superblock, looking for alternates if necessary
124 */
125 if (readsb(1) == 0) {
126 skipclean = 0;
127 if (bflag || preen || calcsb(dev, fsreadfd, &proto) == 0)
128 return(0);
129 if (reply("LOOK FOR ALTERNATE SUPERBLOCKS") == 0)
130 return (0);
131 for (cg = 0; cg < proto.fs_ncg; cg++) {
132 bflag = fsbtodb(&proto, cgsblock(&proto, cg));
133 if (readsb(0) != 0)
134 break;
135 }
136 if (cg >= proto.fs_ncg) {
137 printf("%s %s\n%s %s\n%s %s\n",
138 "SEARCH FOR ALTERNATE SUPER-BLOCK",
139 "FAILED. YOU MUST USE THE",
140 "-b OPTION TO FSCK TO SPECIFY THE",
141 "LOCATION OF AN ALTERNATE",
142 "SUPER-BLOCK TO SUPPLY NEEDED",
143 "INFORMATION; SEE fsck(8).");
144 bflag = 0;
145 return(0);
146 }
147 pwarn("USING ALTERNATE SUPERBLOCK AT %d\n", bflag);
148 bflag = 0;
149 }
150 if (skipclean && sblock.fs_clean) {
151 pwarn("FILESYSTEM CLEAN; SKIPPING CHECKS\n");
152 return (-1);
153 }
154 maxfsblock = sblock.fs_size;
155 maxino = sblock.fs_ncg * sblock.fs_ipg;
156 /*
157 * Check and potentially fix certain fields in the super block.
158 */
159 if (sblock.fs_optim != FS_OPTTIME && sblock.fs_optim != FS_OPTSPACE) {
160 pfatal("UNDEFINED OPTIMIZATION IN SUPERBLOCK");
161 if (reply("SET TO DEFAULT") == 1) {
162 sblock.fs_optim = FS_OPTTIME;
163 sbdirty();
164 }
165 }
166 if ((sblock.fs_minfree < 0 || sblock.fs_minfree > 99)) {
167 pfatal("IMPOSSIBLE MINFREE=%d IN SUPERBLOCK",
168 sblock.fs_minfree);
169 if (reply("SET TO DEFAULT") == 1) {
170 sblock.fs_minfree = 10;
171 sbdirty();
172 }
173 }
174 if (sblock.fs_interleave < 1 ||
175 sblock.fs_interleave > sblock.fs_nsect) {
176 pwarn("IMPOSSIBLE INTERLEAVE=%d IN SUPERBLOCK",
177 sblock.fs_interleave);
178 sblock.fs_interleave = 1;
179 if (preen)
180 printf(" (FIXED)\n");
181 if (preen || reply("SET TO DEFAULT") == 1) {
182 sbdirty();
183 dirty(&asblk);
184 }
185 }
186 if (sblock.fs_npsect < sblock.fs_nsect ||
187 sblock.fs_npsect > sblock.fs_nsect*2) {
188 pwarn("IMPOSSIBLE NPSECT=%d IN SUPERBLOCK",
189 sblock.fs_npsect);
190 sblock.fs_npsect = sblock.fs_nsect;
191 if (preen)
192 printf(" (FIXED)\n");
193 if (preen || reply("SET TO DEFAULT") == 1) {
194 sbdirty();
195 dirty(&asblk);
196 }
197 }
198 if (sblock.fs_inodefmt >= FS_44INODEFMT) {
199 newinofmt = 1;
200 } else {
201 sblock.fs_qbmask = ~sblock.fs_bmask;
202 sblock.fs_qfmask = ~sblock.fs_fmask;
203 newinofmt = 0;
204 }
205 /*
206 * Convert to new inode format.
207 */
208 if (cvtlevel >= 2 && sblock.fs_inodefmt < FS_44INODEFMT) {
209 if (preen)
210 pwarn("CONVERTING TO NEW INODE FORMAT\n");
211 else if (!reply("CONVERT TO NEW INODE FORMAT"))
212 return(0);
213 doinglevel2++;
214 sblock.fs_inodefmt = FS_44INODEFMT;
215 sizepb = sblock.fs_bsize;
216 sblock.fs_maxfilesize = sblock.fs_bsize * NDADDR - 1;
217 for (i = 0; i < NIADDR; i++) {
218 sizepb *= NINDIR(&sblock);
219 sblock.fs_maxfilesize += sizepb;
220 }
221 sblock.fs_maxsymlinklen = MAXSYMLINKLEN;
222 sblock.fs_qbmask = ~sblock.fs_bmask;
223 sblock.fs_qfmask = ~sblock.fs_fmask;
224 sbdirty();
225 dirty(&asblk);
226 }
227 /*
228 * Convert to new cylinder group format.
229 */
230 if (cvtlevel >= 1 && sblock.fs_postblformat == FS_42POSTBLFMT) {
231 if (preen)
232 pwarn("CONVERTING TO NEW CYLINDER GROUP FORMAT\n");
233 else if (!reply("CONVERT TO NEW CYLINDER GROUP FORMAT"))
234 return(0);
235 doinglevel1++;
236 sblock.fs_postblformat = FS_DYNAMICPOSTBLFMT;
237 sblock.fs_nrpos = 8;
238 sblock.fs_postbloff =
239 (char *)(&sblock.fs_opostbl[0][0]) -
240 (char *)(&sblock.fs_firstfield);
241 sblock.fs_rotbloff = &sblock.fs_space[0] -
242 (u_char *)(&sblock.fs_firstfield);
243 sblock.fs_cgsize =
244 fragroundup(&sblock, CGSIZE(&sblock));
245 sbdirty();
246 dirty(&asblk);
247 }
248 if (asblk.b_dirty && !bflag) {
249 memmove(&altsblock, &sblock, (size_t)sblock.fs_sbsize);
250 flush(fswritefd, &asblk);
251 }
252 /*
253 * read in the summary info.
254 */
255 asked = 0;
256 for (i = 0, j = 0; i < sblock.fs_cssize; i += sblock.fs_bsize, j++) {
257 size = sblock.fs_cssize - i < sblock.fs_bsize ?
258 sblock.fs_cssize - i : sblock.fs_bsize;
259 sblock.fs_csp[j] = (struct csum *)calloc(1, (unsigned)size);
260 if (bread(fsreadfd, (char *)sblock.fs_csp[j],
261 fsbtodb(&sblock, sblock.fs_csaddr + j * sblock.fs_frag),
262 size) != 0 && !asked) {
263 pfatal("BAD SUMMARY INFORMATION");
264 if (reply("CONTINUE") == 0)
265 exit(EEXIT);
266 asked++;
267 }
268 }
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 }
464 memset(fs, 0, sizeof(struct fs));
465 fs->fs_fsize = pp->p_fsize;
466 fs->fs_frag = pp->p_frag;
467 fs->fs_cpg = pp->p_cpg;
468 fs->fs_size = pp->p_size;
469 fs->fs_ntrak = lp->d_ntracks;
470 fs->fs_nsect = lp->d_nsectors;
471 fs->fs_spc = lp->d_secpercyl;
472 fs->fs_nspf = fs->fs_fsize / lp->d_secsize;
473 fs->fs_sblkno = roundup(
474 howmany(lp->d_bbsize + lp->d_sbsize, fs->fs_fsize),
475 fs->fs_frag);
476 fs->fs_cgmask = 0xffffffff;
477 for (i = fs->fs_ntrak; i > 1; i >>= 1)
478 fs->fs_cgmask <<= 1;
479 if (!POWEROF2(fs->fs_ntrak))
480 fs->fs_cgmask <<= 1;
481 fs->fs_cgoffset = roundup(
482 howmany(fs->fs_nsect, NSPF(fs)), fs->fs_frag);
483 fs->fs_fpg = (fs->fs_cpg * fs->fs_spc) / NSPF(fs);
484 fs->fs_ncg = howmany(fs->fs_size / fs->fs_spc, fs->fs_cpg);
485 for (fs->fs_fsbtodb = 0, i = NSPF(fs); i > 1; i >>= 1)
486 fs->fs_fsbtodb++;
487 dev_bsize = lp->d_secsize;
488 return (1);
489}
490
491static struct disklabel *
492getdisklabel(s, fd)
493 char *s;
494 int fd;
495{
496 static struct disklabel lab;
497
498 if (ioctl(fd, DIOCGDINFO, (char *)&lab) < 0) {
499 if (s == NULL)
500 return ((struct disklabel *)NULL);
501 pwarn("ioctl (GCINFO): %s\n", strerror(errno));
502 errx(EEXIT, "%s: can't read disk label", s);
503 }
504 return (&lab);
505}
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 <stdio.h>
53#include <stdlib.h>
54#include <string.h>
55
56#include "fsck.h"
57
58struct bufarea asblk;
59#define altsblock (*asblk.b_un.b_fs)
60#define POWEROF2(num) (((num) & ((num) - 1)) == 0)
61
62static void badsb __P((int listerr, char *s));
63static int calcsb __P((char *dev, int devfd, struct fs *fs));
64static struct disklabel *getdisklabel __P((char *s, int fd));
65static int readsb __P((int listerr));
66
67/*
68 * Read in a superblock finding an alternate if necessary.
69 * Return 1 if successful, 0 if unsuccessful, -1 if filesystem
70 * is already clean (preen mode only).
71 */
72int
73setup(dev)
74 char *dev;
75{
76 long cg, size, asked, i, j;
77 long skipclean, bmapsize;
78 struct disklabel *lp;
79 off_t sizepb;
80 struct stat statb;
81 struct fs proto;
82
83 havesb = 0;
84 fswritefd = -1;
85 skipclean = preen;
86 if (stat(dev, &statb) < 0) {
87 printf("Can't stat %s: %s\n", dev, strerror(errno));
88 return (0);
89 }
90 if ((statb.st_mode & S_IFMT) != S_IFCHR) {
91 pfatal("%s is not a character device", dev);
92 if (reply("CONTINUE") == 0)
93 return (0);
94 }
95 if ((fsreadfd = open(dev, O_RDONLY)) < 0) {
96 printf("Can't open %s: %s\n", dev, strerror(errno));
97 return (0);
98 }
99 if (preen == 0)
100 printf("** %s", dev);
101 if (nflag || (fswritefd = open(dev, O_WRONLY)) < 0) {
102 fswritefd = -1;
103 if (preen)
104 pfatal("NO WRITE ACCESS");
105 printf(" (NO WRITE)");
106 }
107 if (preen == 0)
108 printf("\n");
109 fsmodified = 0;
110 lfdir = 0;
111 initbarea(&sblk);
112 initbarea(&asblk);
113 sblk.b_un.b_buf = malloc(SBSIZE);
114 asblk.b_un.b_buf = malloc(SBSIZE);
115 if (sblk.b_un.b_buf == NULL || asblk.b_un.b_buf == NULL)
116 errx(EEXIT, "cannot allocate space for superblock");
117 lp = getdisklabel((char *)NULL, fsreadfd);
118 if (lp)
119 dev_bsize = secsize = lp->d_secsize;
120 else
121 dev_bsize = secsize = DEV_BSIZE;
122 /*
123 * Read in the superblock, looking for alternates if necessary
124 */
125 if (readsb(1) == 0) {
126 skipclean = 0;
127 if (bflag || preen || calcsb(dev, fsreadfd, &proto) == 0)
128 return(0);
129 if (reply("LOOK FOR ALTERNATE SUPERBLOCKS") == 0)
130 return (0);
131 for (cg = 0; cg < proto.fs_ncg; cg++) {
132 bflag = fsbtodb(&proto, cgsblock(&proto, cg));
133 if (readsb(0) != 0)
134 break;
135 }
136 if (cg >= proto.fs_ncg) {
137 printf("%s %s\n%s %s\n%s %s\n",
138 "SEARCH FOR ALTERNATE SUPER-BLOCK",
139 "FAILED. YOU MUST USE THE",
140 "-b OPTION TO FSCK TO SPECIFY THE",
141 "LOCATION OF AN ALTERNATE",
142 "SUPER-BLOCK TO SUPPLY NEEDED",
143 "INFORMATION; SEE fsck(8).");
144 bflag = 0;
145 return(0);
146 }
147 pwarn("USING ALTERNATE SUPERBLOCK AT %d\n", bflag);
148 bflag = 0;
149 }
150 if (skipclean && sblock.fs_clean) {
151 pwarn("FILESYSTEM CLEAN; SKIPPING CHECKS\n");
152 return (-1);
153 }
154 maxfsblock = sblock.fs_size;
155 maxino = sblock.fs_ncg * sblock.fs_ipg;
156 /*
157 * Check and potentially fix certain fields in the super block.
158 */
159 if (sblock.fs_optim != FS_OPTTIME && sblock.fs_optim != FS_OPTSPACE) {
160 pfatal("UNDEFINED OPTIMIZATION IN SUPERBLOCK");
161 if (reply("SET TO DEFAULT") == 1) {
162 sblock.fs_optim = FS_OPTTIME;
163 sbdirty();
164 }
165 }
166 if ((sblock.fs_minfree < 0 || sblock.fs_minfree > 99)) {
167 pfatal("IMPOSSIBLE MINFREE=%d IN SUPERBLOCK",
168 sblock.fs_minfree);
169 if (reply("SET TO DEFAULT") == 1) {
170 sblock.fs_minfree = 10;
171 sbdirty();
172 }
173 }
174 if (sblock.fs_interleave < 1 ||
175 sblock.fs_interleave > sblock.fs_nsect) {
176 pwarn("IMPOSSIBLE INTERLEAVE=%d IN SUPERBLOCK",
177 sblock.fs_interleave);
178 sblock.fs_interleave = 1;
179 if (preen)
180 printf(" (FIXED)\n");
181 if (preen || reply("SET TO DEFAULT") == 1) {
182 sbdirty();
183 dirty(&asblk);
184 }
185 }
186 if (sblock.fs_npsect < sblock.fs_nsect ||
187 sblock.fs_npsect > sblock.fs_nsect*2) {
188 pwarn("IMPOSSIBLE NPSECT=%d IN SUPERBLOCK",
189 sblock.fs_npsect);
190 sblock.fs_npsect = sblock.fs_nsect;
191 if (preen)
192 printf(" (FIXED)\n");
193 if (preen || reply("SET TO DEFAULT") == 1) {
194 sbdirty();
195 dirty(&asblk);
196 }
197 }
198 if (sblock.fs_inodefmt >= FS_44INODEFMT) {
199 newinofmt = 1;
200 } else {
201 sblock.fs_qbmask = ~sblock.fs_bmask;
202 sblock.fs_qfmask = ~sblock.fs_fmask;
203 newinofmt = 0;
204 }
205 /*
206 * Convert to new inode format.
207 */
208 if (cvtlevel >= 2 && sblock.fs_inodefmt < FS_44INODEFMT) {
209 if (preen)
210 pwarn("CONVERTING TO NEW INODE FORMAT\n");
211 else if (!reply("CONVERT TO NEW INODE FORMAT"))
212 return(0);
213 doinglevel2++;
214 sblock.fs_inodefmt = FS_44INODEFMT;
215 sizepb = sblock.fs_bsize;
216 sblock.fs_maxfilesize = sblock.fs_bsize * NDADDR - 1;
217 for (i = 0; i < NIADDR; i++) {
218 sizepb *= NINDIR(&sblock);
219 sblock.fs_maxfilesize += sizepb;
220 }
221 sblock.fs_maxsymlinklen = MAXSYMLINKLEN;
222 sblock.fs_qbmask = ~sblock.fs_bmask;
223 sblock.fs_qfmask = ~sblock.fs_fmask;
224 sbdirty();
225 dirty(&asblk);
226 }
227 /*
228 * Convert to new cylinder group format.
229 */
230 if (cvtlevel >= 1 && sblock.fs_postblformat == FS_42POSTBLFMT) {
231 if (preen)
232 pwarn("CONVERTING TO NEW CYLINDER GROUP FORMAT\n");
233 else if (!reply("CONVERT TO NEW CYLINDER GROUP FORMAT"))
234 return(0);
235 doinglevel1++;
236 sblock.fs_postblformat = FS_DYNAMICPOSTBLFMT;
237 sblock.fs_nrpos = 8;
238 sblock.fs_postbloff =
239 (char *)(&sblock.fs_opostbl[0][0]) -
240 (char *)(&sblock.fs_firstfield);
241 sblock.fs_rotbloff = &sblock.fs_space[0] -
242 (u_char *)(&sblock.fs_firstfield);
243 sblock.fs_cgsize =
244 fragroundup(&sblock, CGSIZE(&sblock));
245 sbdirty();
246 dirty(&asblk);
247 }
248 if (asblk.b_dirty && !bflag) {
249 memmove(&altsblock, &sblock, (size_t)sblock.fs_sbsize);
250 flush(fswritefd, &asblk);
251 }
252 /*
253 * read in the summary info.
254 */
255 asked = 0;
256 for (i = 0, j = 0; i < sblock.fs_cssize; i += sblock.fs_bsize, j++) {
257 size = sblock.fs_cssize - i < sblock.fs_bsize ?
258 sblock.fs_cssize - i : sblock.fs_bsize;
259 sblock.fs_csp[j] = (struct csum *)calloc(1, (unsigned)size);
260 if (bread(fsreadfd, (char *)sblock.fs_csp[j],
261 fsbtodb(&sblock, sblock.fs_csaddr + j * sblock.fs_frag),
262 size) != 0 && !asked) {
263 pfatal("BAD SUMMARY INFORMATION");
264 if (reply("CONTINUE") == 0)
265 exit(EEXIT);
266 asked++;
267 }
268 }
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 }
464 memset(fs, 0, sizeof(struct fs));
465 fs->fs_fsize = pp->p_fsize;
466 fs->fs_frag = pp->p_frag;
467 fs->fs_cpg = pp->p_cpg;
468 fs->fs_size = pp->p_size;
469 fs->fs_ntrak = lp->d_ntracks;
470 fs->fs_nsect = lp->d_nsectors;
471 fs->fs_spc = lp->d_secpercyl;
472 fs->fs_nspf = fs->fs_fsize / lp->d_secsize;
473 fs->fs_sblkno = roundup(
474 howmany(lp->d_bbsize + lp->d_sbsize, fs->fs_fsize),
475 fs->fs_frag);
476 fs->fs_cgmask = 0xffffffff;
477 for (i = fs->fs_ntrak; i > 1; i >>= 1)
478 fs->fs_cgmask <<= 1;
479 if (!POWEROF2(fs->fs_ntrak))
480 fs->fs_cgmask <<= 1;
481 fs->fs_cgoffset = roundup(
482 howmany(fs->fs_nsect, NSPF(fs)), fs->fs_frag);
483 fs->fs_fpg = (fs->fs_cpg * fs->fs_spc) / NSPF(fs);
484 fs->fs_ncg = howmany(fs->fs_size / fs->fs_spc, fs->fs_cpg);
485 for (fs->fs_fsbtodb = 0, i = NSPF(fs); i > 1; i >>= 1)
486 fs->fs_fsbtodb++;
487 dev_bsize = lp->d_secsize;
488 return (1);
489}
490
491static struct disklabel *
492getdisklabel(s, fd)
493 char *s;
494 int fd;
495{
496 static struct disklabel lab;
497
498 if (ioctl(fd, DIOCGDINFO, (char *)&lab) < 0) {
499 if (s == NULL)
500 return ((struct disklabel *)NULL);
501 pwarn("ioctl (GCINFO): %s\n", strerror(errno));
502 errx(EEXIT, "%s: can't read disk label", s);
503 }
504 return (&lab);
505}