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
35#if 0
36static const char sccsid[] = "@(#)setup.c 8.10 (Berkeley) 5/9/95";
37#endif
38static const char rcsid[] =
| 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
35#if 0
36static const char sccsid[] = "@(#)setup.c 8.10 (Berkeley) 5/9/95";
37#endif
38static const char rcsid[] =
|
40#endif /* not lint */
41
42#define DKTYPENAMES
43#include <sys/param.h>
44#include <sys/stat.h>
45#include <sys/disklabel.h>
46#include <sys/file.h>
47#include <sys/sysctl.h>
48
49#include <ufs/ufs/dinode.h>
50#include <ufs/ffs/fs.h>
51
52#include <ctype.h>
53#include <err.h>
54#include <errno.h>
55#include <string.h>
56
57#include "fsck.h"
58
59struct bufarea asblk;
60#define altsblock (*asblk.b_un.b_fs)
61#define POWEROF2(num) (((num) & ((num) - 1)) == 0)
62
63static void badsb __P((int listerr, char *s));
64static int calcsb __P((char *dev, int devfd, struct fs *fs));
65static struct disklabel *getdisklabel __P((char *s, int fd));
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, asked, i, j;
77 long bmapsize;
78 off_t sizepb;
79 struct stat statb;
80 struct fs proto;
81 size_t size;
82
83 havesb = 0;
84 fswritefd = -1;
85 cursnapshot = 0;
86 if (stat(dev, &statb) < 0) {
87 printf("Can't stat %s: %s\n", dev, strerror(errno));
88 if (bkgrdflag) {
89 unlink(snapname);
90 bkgrdflag = 0;
91 }
92 return (0);
93 }
94 if ((statb.st_mode & S_IFMT) != S_IFCHR &&
95 (statb.st_mode & S_IFMT) != S_IFBLK) {
96 if (bkgrdflag != 0 && (statb.st_flags & SF_SNAPSHOT) == 0) {
97 unlink(snapname);
98 printf("background fsck lacks a snapshot\n");
99 exit(EEXIT);
100 }
101 if ((statb.st_flags & SF_SNAPSHOT) != 0 && cvtlevel == 0) {
102 cursnapshot = statb.st_ino;
103 } else {
104 if (cvtlevel == 0 ||
105 (statb.st_flags & SF_SNAPSHOT) == 0) {
106 if (preen && bkgrdflag) {
107 unlink(snapname);
108 bkgrdflag = 0;
109 }
110 pfatal("%s is not a disk device", dev);
111 if (reply("CONTINUE") == 0) {
112 if (bkgrdflag) {
113 unlink(snapname);
114 bkgrdflag = 0;
115 }
116 return (0);
117 }
118 } else {
119 if (bkgrdflag) {
120 unlink(snapname);
121 bkgrdflag = 0;
122 }
123 pfatal("cannot convert a snapshot");
124 exit(EEXIT);
125 }
126 }
127 }
128 if ((fsreadfd = open(dev, O_RDONLY)) < 0) {
129 if (bkgrdflag) {
130 unlink(snapname);
131 bkgrdflag = 0;
132 }
133 printf("Can't open %s: %s\n", dev, strerror(errno));
134 return (0);
135 }
136 if (bkgrdflag) {
137 unlink(snapname);
138 size = MIBSIZE;
139 if (sysctlnametomib("vfs.ffs.adjrefcnt", adjrefcnt, &size) < 0||
140 sysctlnametomib("vfs.ffs.adjblkcnt", adjblkcnt, &size) < 0||
141 sysctlnametomib("vfs.ffs.freefiles", freefiles, &size) < 0||
142 sysctlnametomib("vfs.ffs.freedirs", freedirs, &size) < 0 ||
143 sysctlnametomib("vfs.ffs.freeblks", freeblks, &size) < 0) {
144 pfatal("kernel lacks background fsck support\n");
145 exit(EEXIT);
146 }
147 cmd.version = FFS_CMD_VERSION;
148 cmd.handle = fsreadfd;
149 fswritefd = -1;
150 }
151 if (preen == 0)
152 printf("** %s", dev);
153 if (bkgrdflag == 0 &&
154 (nflag || (fswritefd = open(dev, O_WRONLY)) < 0)) {
155 fswritefd = -1;
156 if (preen)
157 pfatal("NO WRITE ACCESS");
158 printf(" (NO WRITE)");
159 }
160 if (preen == 0)
161 printf("\n");
162 /*
163 * Read in the superblock, looking for alternates if necessary
164 */
165 if (readsb(1) == 0) {
166 skipclean = 0;
167 if (bflag || preen || calcsb(dev, fsreadfd, &proto) == 0)
168 return(0);
169 if (reply("LOOK FOR ALTERNATE SUPERBLOCKS") == 0)
170 return (0);
171 for (cg = 0; cg < proto.fs_ncg; cg++) {
172 bflag = fsbtodb(&proto, cgsblock(&proto, cg));
173 if (readsb(0) != 0)
174 break;
175 }
176 if (cg >= proto.fs_ncg) {
177 printf("%s %s\n%s %s\n%s %s\n",
178 "SEARCH FOR ALTERNATE SUPER-BLOCK",
179 "FAILED. YOU MUST USE THE",
180 "-b OPTION TO FSCK TO SPECIFY THE",
181 "LOCATION OF AN ALTERNATE",
182 "SUPER-BLOCK TO SUPPLY NEEDED",
183 "INFORMATION; SEE fsck(8).");
184 bflag = 0;
185 return(0);
186 }
187 pwarn("USING ALTERNATE SUPERBLOCK AT %d\n", bflag);
188 bflag = 0;
189 }
190 if (skipclean && preen && sblock.fs_clean) {
191 pwarn("FILESYSTEM CLEAN; SKIPPING CHECKS\n");
192 return (-1);
193 }
194 maxfsblock = sblock.fs_size;
195 maxino = sblock.fs_ncg * sblock.fs_ipg;
196 /*
197 * Check and potentially fix certain fields in the super block.
198 */
199 if (sblock.fs_optim != FS_OPTTIME && sblock.fs_optim != FS_OPTSPACE) {
200 pfatal("UNDEFINED OPTIMIZATION IN SUPERBLOCK");
201 if (reply("SET TO DEFAULT") == 1) {
202 sblock.fs_optim = FS_OPTTIME;
203 sbdirty();
204 }
205 }
206 if ((sblock.fs_minfree < 0 || sblock.fs_minfree > 99)) {
207 pfatal("IMPOSSIBLE MINFREE=%d IN SUPERBLOCK",
208 sblock.fs_minfree);
209 if (reply("SET TO DEFAULT") == 1) {
210 sblock.fs_minfree = 10;
211 sbdirty();
212 }
213 }
214 if (sblock.fs_interleave < 1 ||
215 sblock.fs_interleave > sblock.fs_nsect) {
216 pfatal("IMPOSSIBLE INTERLEAVE=%d IN SUPERBLOCK",
217 sblock.fs_interleave);
218 sblock.fs_interleave = 1;
219 if (preen)
220 printf(" (FIXED)\n");
221 if (preen || reply("SET TO DEFAULT") == 1) {
222 sbdirty();
223 dirty(&asblk);
224 }
225 }
226 if (sblock.fs_npsect < sblock.fs_nsect ||
227 sblock.fs_npsect > sblock.fs_nsect*2) {
228 pfatal("IMPOSSIBLE NPSECT=%d IN SUPERBLOCK",
229 sblock.fs_npsect);
230 sblock.fs_npsect = sblock.fs_nsect;
231 if (preen)
232 printf(" (FIXED)\n");
233 if (preen || reply("SET TO DEFAULT") == 1) {
234 sbdirty();
235 dirty(&asblk);
236 }
237 }
238 if (sblock.fs_inodefmt >= FS_44INODEFMT) {
239 newinofmt = 1;
240 } else {
241 sblock.fs_qbmask = ~sblock.fs_bmask;
242 sblock.fs_qfmask = ~sblock.fs_fmask;
243 /* This should match the kernel limit in ffs_oldfscompat(). */
244 sblock.fs_maxfilesize = (u_int64_t)1 << 39;
245 newinofmt = 0;
246 }
247 /*
248 * Convert to new inode format.
249 */
250 if (cvtlevel >= 2 && sblock.fs_inodefmt < FS_44INODEFMT) {
251 if (preen)
252 pwarn("CONVERTING TO NEW INODE FORMAT\n");
253 else if (!reply("CONVERT TO NEW INODE FORMAT"))
254 return(0);
255 doinglevel2++;
256 sblock.fs_inodefmt = FS_44INODEFMT;
257 sizepb = sblock.fs_bsize;
258 sblock.fs_maxfilesize = sblock.fs_bsize * NDADDR - 1;
259 for (i = 0; i < NIADDR; i++) {
260 sizepb *= NINDIR(&sblock);
261 sblock.fs_maxfilesize += sizepb;
262 }
263 sblock.fs_maxsymlinklen = MAXSYMLINKLEN;
264 sblock.fs_qbmask = ~sblock.fs_bmask;
265 sblock.fs_qfmask = ~sblock.fs_fmask;
266 sbdirty();
267 dirty(&asblk);
268 }
269 /*
270 * Convert to new cylinder group format.
271 */
272 if (cvtlevel >= 1 && sblock.fs_postblformat == FS_42POSTBLFMT) {
273 if (preen)
274 pwarn("CONVERTING TO NEW CYLINDER GROUP FORMAT\n");
275 else if (!reply("CONVERT TO NEW CYLINDER GROUP FORMAT"))
276 return(0);
277 doinglevel1++;
278 sblock.fs_postblformat = FS_DYNAMICPOSTBLFMT;
279 sblock.fs_nrpos = 8;
280 sblock.fs_postbloff =
281 (char *)(&sblock.fs_opostbl[0][0]) -
282 (char *)(&sblock.fs_firstfield);
283 sblock.fs_rotbloff = &sblock.fs_space[0] -
284 (u_char *)(&sblock.fs_firstfield);
285 sblock.fs_cgsize =
286 fragroundup(&sblock, CGSIZE(&sblock));
287 sbdirty();
288 dirty(&asblk);
289 }
290 if (asblk.b_dirty && !bflag) {
291 memmove(&altsblock, &sblock, (size_t)sblock.fs_sbsize);
292 flush(fswritefd, &asblk);
293 }
294 /*
295 * read in the summary info.
296 */
297 asked = 0;
298 sblock.fs_csp = calloc(1, sblock.fs_cssize);
299 for (i = 0, j = 0; i < sblock.fs_cssize; i += sblock.fs_bsize, j++) {
300 size = sblock.fs_cssize - i < sblock.fs_bsize ?
301 sblock.fs_cssize - i : sblock.fs_bsize;
302 if (bread(fsreadfd, (char *)sblock.fs_csp + i,
303 fsbtodb(&sblock, sblock.fs_csaddr + j * sblock.fs_frag),
304 size) != 0 && !asked) {
305 pfatal("BAD SUMMARY INFORMATION");
306 if (reply("CONTINUE") == 0) {
307 ckfini(0);
308 exit(EEXIT);
309 }
310 asked++;
311 }
312 }
313 /*
314 * allocate and initialize the necessary maps
315 */
316 bmapsize = roundup(howmany(maxfsblock, NBBY), sizeof(short));
317 blockmap = calloc((unsigned)bmapsize, sizeof (char));
318 if (blockmap == NULL) {
319 printf("cannot alloc %u bytes for blockmap\n",
320 (unsigned)bmapsize);
321 goto badsb;
322 }
323 inostathead = calloc((unsigned)(sblock.fs_ncg),
324 sizeof(struct inostatlist));
325 if (inostathead == NULL) {
326 printf("cannot alloc %u bytes for inostathead\n",
327 (unsigned)(sizeof(struct inostatlist) * (sblock.fs_ncg)));
328 goto badsb;
329 }
330 numdirs = sblock.fs_cstotal.cs_ndir;
331 dirhash = numdirs;
332 if (numdirs == 0) {
333 printf("numdirs is zero, try using an alternate superblock\n");
334 goto badsb;
335 }
336 inplast = 0;
337 listmax = numdirs + 10;
338 inpsort = (struct inoinfo **)calloc((unsigned)listmax,
339 sizeof(struct inoinfo *));
340 inphead = (struct inoinfo **)calloc((unsigned)numdirs,
341 sizeof(struct inoinfo *));
342 if (inpsort == NULL || inphead == NULL) {
343 printf("cannot alloc %u bytes for inphead\n",
344 (unsigned)numdirs * sizeof(struct inoinfo *));
345 goto badsb;
346 }
347 bufinit();
348 if (sblock.fs_flags & FS_DOSOFTDEP)
349 usedsoftdep = 1;
350 else
351 usedsoftdep = 0;
352 return (1);
353
354badsb:
355 ckfini(0);
356 return (0);
357}
358
359/*
360 * Read in the super block and its summary info.
361 */
362int
363readsb(listerr)
364 int listerr;
365{
366 ufs_daddr_t super = bflag ? bflag : SBOFF / dev_bsize;
367
368 if (bread(fsreadfd, (char *)&sblock, super, (long)SBSIZE) != 0)
369 return (0);
370 sblk.b_bno = super;
371 sblk.b_size = SBSIZE;
372 /*
373 * run a few consistency checks of the super block
374 */
375 if (sblock.fs_magic != FS_MAGIC)
376 { badsb(listerr, "MAGIC NUMBER WRONG"); return (0); }
377 if (sblock.fs_ncg < 1)
378 { badsb(listerr, "NCG OUT OF RANGE"); return (0); }
379 if (sblock.fs_cpg < 1)
380 { badsb(listerr, "CPG OUT OF RANGE"); return (0); }
381 if (sblock.fs_ncg * sblock.fs_cpg < sblock.fs_ncyl ||
382 (sblock.fs_ncg - 1) * sblock.fs_cpg >= sblock.fs_ncyl)
383 { badsb(listerr, "NCYL LESS THAN NCG*CPG"); return (0); }
384 if (sblock.fs_sbsize > SBSIZE)
385 { badsb(listerr, "SIZE PREPOSTEROUSLY LARGE"); return (0); }
386 /*
387 * Compute block size that the filesystem is based on,
388 * according to fsbtodb, and adjust superblock block number
389 * so we can tell if this is an alternate later.
390 */
391 super *= dev_bsize;
392 dev_bsize = sblock.fs_fsize / fsbtodb(&sblock, 1);
393 sblk.b_bno = super / dev_bsize;
394 if (bflag) {
395 havesb = 1;
396 return (1);
397 }
398 /*
399 * Set all possible fields that could differ, then do check
400 * of whole super block against an alternate super block.
401 * When an alternate super-block is specified this check is skipped.
402 */
403 getblk(&asblk, cgsblock(&sblock, sblock.fs_ncg - 1), sblock.fs_sbsize);
404 if (asblk.b_errs)
405 return (0);
406 altsblock.fs_firstfield = sblock.fs_firstfield;
407 altsblock.fs_unused_1 = sblock.fs_unused_1;
408 altsblock.fs_time = sblock.fs_time;
409 altsblock.fs_cstotal = sblock.fs_cstotal;
410 altsblock.fs_cgrotor = sblock.fs_cgrotor;
411 altsblock.fs_fmod = sblock.fs_fmod;
412 altsblock.fs_clean = sblock.fs_clean;
413 altsblock.fs_ronly = sblock.fs_ronly;
414 altsblock.fs_flags = sblock.fs_flags;
415 altsblock.fs_maxcontig = sblock.fs_maxcontig;
416 altsblock.fs_minfree = sblock.fs_minfree;
417 altsblock.fs_optim = sblock.fs_optim;
418 altsblock.fs_rotdelay = sblock.fs_rotdelay;
419 altsblock.fs_maxbpg = sblock.fs_maxbpg;
420 memmove(altsblock.fs_ocsp, sblock.fs_ocsp, sizeof sblock.fs_ocsp);
421 altsblock.fs_csp = sblock.fs_csp;
422 altsblock.fs_maxcluster = sblock.fs_maxcluster;
423 altsblock.fs_contigdirs = sblock.fs_contigdirs;
424 altsblock.fs_active = sblock.fs_active;
425 altsblock.fs_avgfilesize = sblock.fs_avgfilesize;
426 altsblock.fs_avgfpdir = sblock.fs_avgfpdir;
427 altsblock.fs_pendingblocks = sblock.fs_pendingblocks;
428 altsblock.fs_pendinginodes = sblock.fs_pendinginodes;
429 memmove(altsblock.fs_fsmnt, sblock.fs_fsmnt, sizeof sblock.fs_fsmnt);
430 memmove(altsblock.fs_snapinum, sblock.fs_snapinum,
431 sizeof sblock.fs_snapinum);
432 memmove(altsblock.fs_sparecon,
433 sblock.fs_sparecon, sizeof sblock.fs_sparecon);
434 /*
435 * The following should not have to be copied.
436 */
437 altsblock.fs_fsbtodb = sblock.fs_fsbtodb;
438 altsblock.fs_interleave = sblock.fs_interleave;
439 altsblock.fs_npsect = sblock.fs_npsect;
440 altsblock.fs_nrpos = sblock.fs_nrpos;
441 altsblock.fs_state = sblock.fs_state;
442 altsblock.fs_qbmask = sblock.fs_qbmask;
443 altsblock.fs_qfmask = sblock.fs_qfmask;
444 altsblock.fs_state = sblock.fs_state;
445 altsblock.fs_maxfilesize = sblock.fs_maxfilesize;
446 if (memcmp(&sblock, &altsblock, (int)sblock.fs_sbsize)) {
447 if (debug) {
448 long *nlp, *olp, *endlp;
449
450 printf("superblock mismatches\n");
451 nlp = (long *)&altsblock;
452 olp = (long *)&sblock;
453 endlp = olp + (sblock.fs_sbsize / sizeof *olp);
454 for ( ; olp < endlp; olp++, nlp++) {
455 if (*olp == *nlp)
456 continue;
457 printf(
458 "offset %d, original %ld, alternate %ld\n",
459 olp - (long *)&sblock, *olp, *nlp);
460 }
461 }
462 badsb(listerr,
463 "VALUES IN SUPER BLOCK DISAGREE WITH THOSE IN FIRST ALTERNATE");
464 return (0);
465 }
466 havesb = 1;
467 return (1);
468}
469
470static void
471badsb(listerr, s)
472 int listerr;
473 char *s;
474{
475
476 if (!listerr)
477 return;
478 if (preen)
479 printf("%s: ", cdevname);
480 pfatal("BAD SUPER BLOCK: %s\n", s);
481}
482
483void
484sblock_init()
485{
486 struct disklabel *lp;
487
488 fswritefd = -1;
489 fsmodified = 0;
490 lfdir = 0;
491 initbarea(&sblk);
492 initbarea(&asblk);
493 sblk.b_un.b_buf = malloc(SBSIZE);
494 asblk.b_un.b_buf = malloc(SBSIZE);
495 if (sblk.b_un.b_buf == NULL || asblk.b_un.b_buf == NULL)
496 errx(EEXIT, "cannot allocate space for superblock");
497 if ((lp = getdisklabel(NULL, fsreadfd)))
498 dev_bsize = secsize = lp->d_secsize;
499 else
500 dev_bsize = secsize = DEV_BSIZE;
501}
502
503/*
504 * Calculate a prototype superblock based on information in the disk label.
505 * When done the cgsblock macro can be calculated and the fs_ncg field
506 * can be used. Do NOT attempt to use other macros without verifying that
507 * their needed information is available!
508 */
509static int
510calcsb(dev, devfd, fs)
511 char *dev;
512 int devfd;
| 40#endif /* not lint */
41
42#define DKTYPENAMES
43#include <sys/param.h>
44#include <sys/stat.h>
45#include <sys/disklabel.h>
46#include <sys/file.h>
47#include <sys/sysctl.h>
48
49#include <ufs/ufs/dinode.h>
50#include <ufs/ffs/fs.h>
51
52#include <ctype.h>
53#include <err.h>
54#include <errno.h>
55#include <string.h>
56
57#include "fsck.h"
58
59struct bufarea asblk;
60#define altsblock (*asblk.b_un.b_fs)
61#define POWEROF2(num) (((num) & ((num) - 1)) == 0)
62
63static void badsb __P((int listerr, char *s));
64static int calcsb __P((char *dev, int devfd, struct fs *fs));
65static struct disklabel *getdisklabel __P((char *s, int fd));
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, asked, i, j;
77 long bmapsize;
78 off_t sizepb;
79 struct stat statb;
80 struct fs proto;
81 size_t size;
82
83 havesb = 0;
84 fswritefd = -1;
85 cursnapshot = 0;
86 if (stat(dev, &statb) < 0) {
87 printf("Can't stat %s: %s\n", dev, strerror(errno));
88 if (bkgrdflag) {
89 unlink(snapname);
90 bkgrdflag = 0;
91 }
92 return (0);
93 }
94 if ((statb.st_mode & S_IFMT) != S_IFCHR &&
95 (statb.st_mode & S_IFMT) != S_IFBLK) {
96 if (bkgrdflag != 0 && (statb.st_flags & SF_SNAPSHOT) == 0) {
97 unlink(snapname);
98 printf("background fsck lacks a snapshot\n");
99 exit(EEXIT);
100 }
101 if ((statb.st_flags & SF_SNAPSHOT) != 0 && cvtlevel == 0) {
102 cursnapshot = statb.st_ino;
103 } else {
104 if (cvtlevel == 0 ||
105 (statb.st_flags & SF_SNAPSHOT) == 0) {
106 if (preen && bkgrdflag) {
107 unlink(snapname);
108 bkgrdflag = 0;
109 }
110 pfatal("%s is not a disk device", dev);
111 if (reply("CONTINUE") == 0) {
112 if (bkgrdflag) {
113 unlink(snapname);
114 bkgrdflag = 0;
115 }
116 return (0);
117 }
118 } else {
119 if (bkgrdflag) {
120 unlink(snapname);
121 bkgrdflag = 0;
122 }
123 pfatal("cannot convert a snapshot");
124 exit(EEXIT);
125 }
126 }
127 }
128 if ((fsreadfd = open(dev, O_RDONLY)) < 0) {
129 if (bkgrdflag) {
130 unlink(snapname);
131 bkgrdflag = 0;
132 }
133 printf("Can't open %s: %s\n", dev, strerror(errno));
134 return (0);
135 }
136 if (bkgrdflag) {
137 unlink(snapname);
138 size = MIBSIZE;
139 if (sysctlnametomib("vfs.ffs.adjrefcnt", adjrefcnt, &size) < 0||
140 sysctlnametomib("vfs.ffs.adjblkcnt", adjblkcnt, &size) < 0||
141 sysctlnametomib("vfs.ffs.freefiles", freefiles, &size) < 0||
142 sysctlnametomib("vfs.ffs.freedirs", freedirs, &size) < 0 ||
143 sysctlnametomib("vfs.ffs.freeblks", freeblks, &size) < 0) {
144 pfatal("kernel lacks background fsck support\n");
145 exit(EEXIT);
146 }
147 cmd.version = FFS_CMD_VERSION;
148 cmd.handle = fsreadfd;
149 fswritefd = -1;
150 }
151 if (preen == 0)
152 printf("** %s", dev);
153 if (bkgrdflag == 0 &&
154 (nflag || (fswritefd = open(dev, O_WRONLY)) < 0)) {
155 fswritefd = -1;
156 if (preen)
157 pfatal("NO WRITE ACCESS");
158 printf(" (NO WRITE)");
159 }
160 if (preen == 0)
161 printf("\n");
162 /*
163 * Read in the superblock, looking for alternates if necessary
164 */
165 if (readsb(1) == 0) {
166 skipclean = 0;
167 if (bflag || preen || calcsb(dev, fsreadfd, &proto) == 0)
168 return(0);
169 if (reply("LOOK FOR ALTERNATE SUPERBLOCKS") == 0)
170 return (0);
171 for (cg = 0; cg < proto.fs_ncg; cg++) {
172 bflag = fsbtodb(&proto, cgsblock(&proto, cg));
173 if (readsb(0) != 0)
174 break;
175 }
176 if (cg >= proto.fs_ncg) {
177 printf("%s %s\n%s %s\n%s %s\n",
178 "SEARCH FOR ALTERNATE SUPER-BLOCK",
179 "FAILED. YOU MUST USE THE",
180 "-b OPTION TO FSCK TO SPECIFY THE",
181 "LOCATION OF AN ALTERNATE",
182 "SUPER-BLOCK TO SUPPLY NEEDED",
183 "INFORMATION; SEE fsck(8).");
184 bflag = 0;
185 return(0);
186 }
187 pwarn("USING ALTERNATE SUPERBLOCK AT %d\n", bflag);
188 bflag = 0;
189 }
190 if (skipclean && preen && sblock.fs_clean) {
191 pwarn("FILESYSTEM CLEAN; SKIPPING CHECKS\n");
192 return (-1);
193 }
194 maxfsblock = sblock.fs_size;
195 maxino = sblock.fs_ncg * sblock.fs_ipg;
196 /*
197 * Check and potentially fix certain fields in the super block.
198 */
199 if (sblock.fs_optim != FS_OPTTIME && sblock.fs_optim != FS_OPTSPACE) {
200 pfatal("UNDEFINED OPTIMIZATION IN SUPERBLOCK");
201 if (reply("SET TO DEFAULT") == 1) {
202 sblock.fs_optim = FS_OPTTIME;
203 sbdirty();
204 }
205 }
206 if ((sblock.fs_minfree < 0 || sblock.fs_minfree > 99)) {
207 pfatal("IMPOSSIBLE MINFREE=%d IN SUPERBLOCK",
208 sblock.fs_minfree);
209 if (reply("SET TO DEFAULT") == 1) {
210 sblock.fs_minfree = 10;
211 sbdirty();
212 }
213 }
214 if (sblock.fs_interleave < 1 ||
215 sblock.fs_interleave > sblock.fs_nsect) {
216 pfatal("IMPOSSIBLE INTERLEAVE=%d IN SUPERBLOCK",
217 sblock.fs_interleave);
218 sblock.fs_interleave = 1;
219 if (preen)
220 printf(" (FIXED)\n");
221 if (preen || reply("SET TO DEFAULT") == 1) {
222 sbdirty();
223 dirty(&asblk);
224 }
225 }
226 if (sblock.fs_npsect < sblock.fs_nsect ||
227 sblock.fs_npsect > sblock.fs_nsect*2) {
228 pfatal("IMPOSSIBLE NPSECT=%d IN SUPERBLOCK",
229 sblock.fs_npsect);
230 sblock.fs_npsect = sblock.fs_nsect;
231 if (preen)
232 printf(" (FIXED)\n");
233 if (preen || reply("SET TO DEFAULT") == 1) {
234 sbdirty();
235 dirty(&asblk);
236 }
237 }
238 if (sblock.fs_inodefmt >= FS_44INODEFMT) {
239 newinofmt = 1;
240 } else {
241 sblock.fs_qbmask = ~sblock.fs_bmask;
242 sblock.fs_qfmask = ~sblock.fs_fmask;
243 /* This should match the kernel limit in ffs_oldfscompat(). */
244 sblock.fs_maxfilesize = (u_int64_t)1 << 39;
245 newinofmt = 0;
246 }
247 /*
248 * Convert to new inode format.
249 */
250 if (cvtlevel >= 2 && sblock.fs_inodefmt < FS_44INODEFMT) {
251 if (preen)
252 pwarn("CONVERTING TO NEW INODE FORMAT\n");
253 else if (!reply("CONVERT TO NEW INODE FORMAT"))
254 return(0);
255 doinglevel2++;
256 sblock.fs_inodefmt = FS_44INODEFMT;
257 sizepb = sblock.fs_bsize;
258 sblock.fs_maxfilesize = sblock.fs_bsize * NDADDR - 1;
259 for (i = 0; i < NIADDR; i++) {
260 sizepb *= NINDIR(&sblock);
261 sblock.fs_maxfilesize += sizepb;
262 }
263 sblock.fs_maxsymlinklen = MAXSYMLINKLEN;
264 sblock.fs_qbmask = ~sblock.fs_bmask;
265 sblock.fs_qfmask = ~sblock.fs_fmask;
266 sbdirty();
267 dirty(&asblk);
268 }
269 /*
270 * Convert to new cylinder group format.
271 */
272 if (cvtlevel >= 1 && sblock.fs_postblformat == FS_42POSTBLFMT) {
273 if (preen)
274 pwarn("CONVERTING TO NEW CYLINDER GROUP FORMAT\n");
275 else if (!reply("CONVERT TO NEW CYLINDER GROUP FORMAT"))
276 return(0);
277 doinglevel1++;
278 sblock.fs_postblformat = FS_DYNAMICPOSTBLFMT;
279 sblock.fs_nrpos = 8;
280 sblock.fs_postbloff =
281 (char *)(&sblock.fs_opostbl[0][0]) -
282 (char *)(&sblock.fs_firstfield);
283 sblock.fs_rotbloff = &sblock.fs_space[0] -
284 (u_char *)(&sblock.fs_firstfield);
285 sblock.fs_cgsize =
286 fragroundup(&sblock, CGSIZE(&sblock));
287 sbdirty();
288 dirty(&asblk);
289 }
290 if (asblk.b_dirty && !bflag) {
291 memmove(&altsblock, &sblock, (size_t)sblock.fs_sbsize);
292 flush(fswritefd, &asblk);
293 }
294 /*
295 * read in the summary info.
296 */
297 asked = 0;
298 sblock.fs_csp = calloc(1, sblock.fs_cssize);
299 for (i = 0, j = 0; i < sblock.fs_cssize; i += sblock.fs_bsize, j++) {
300 size = sblock.fs_cssize - i < sblock.fs_bsize ?
301 sblock.fs_cssize - i : sblock.fs_bsize;
302 if (bread(fsreadfd, (char *)sblock.fs_csp + i,
303 fsbtodb(&sblock, sblock.fs_csaddr + j * sblock.fs_frag),
304 size) != 0 && !asked) {
305 pfatal("BAD SUMMARY INFORMATION");
306 if (reply("CONTINUE") == 0) {
307 ckfini(0);
308 exit(EEXIT);
309 }
310 asked++;
311 }
312 }
313 /*
314 * allocate and initialize the necessary maps
315 */
316 bmapsize = roundup(howmany(maxfsblock, NBBY), sizeof(short));
317 blockmap = calloc((unsigned)bmapsize, sizeof (char));
318 if (blockmap == NULL) {
319 printf("cannot alloc %u bytes for blockmap\n",
320 (unsigned)bmapsize);
321 goto badsb;
322 }
323 inostathead = calloc((unsigned)(sblock.fs_ncg),
324 sizeof(struct inostatlist));
325 if (inostathead == NULL) {
326 printf("cannot alloc %u bytes for inostathead\n",
327 (unsigned)(sizeof(struct inostatlist) * (sblock.fs_ncg)));
328 goto badsb;
329 }
330 numdirs = sblock.fs_cstotal.cs_ndir;
331 dirhash = numdirs;
332 if (numdirs == 0) {
333 printf("numdirs is zero, try using an alternate superblock\n");
334 goto badsb;
335 }
336 inplast = 0;
337 listmax = numdirs + 10;
338 inpsort = (struct inoinfo **)calloc((unsigned)listmax,
339 sizeof(struct inoinfo *));
340 inphead = (struct inoinfo **)calloc((unsigned)numdirs,
341 sizeof(struct inoinfo *));
342 if (inpsort == NULL || inphead == NULL) {
343 printf("cannot alloc %u bytes for inphead\n",
344 (unsigned)numdirs * sizeof(struct inoinfo *));
345 goto badsb;
346 }
347 bufinit();
348 if (sblock.fs_flags & FS_DOSOFTDEP)
349 usedsoftdep = 1;
350 else
351 usedsoftdep = 0;
352 return (1);
353
354badsb:
355 ckfini(0);
356 return (0);
357}
358
359/*
360 * Read in the super block and its summary info.
361 */
362int
363readsb(listerr)
364 int listerr;
365{
366 ufs_daddr_t super = bflag ? bflag : SBOFF / dev_bsize;
367
368 if (bread(fsreadfd, (char *)&sblock, super, (long)SBSIZE) != 0)
369 return (0);
370 sblk.b_bno = super;
371 sblk.b_size = SBSIZE;
372 /*
373 * run a few consistency checks of the super block
374 */
375 if (sblock.fs_magic != FS_MAGIC)
376 { badsb(listerr, "MAGIC NUMBER WRONG"); return (0); }
377 if (sblock.fs_ncg < 1)
378 { badsb(listerr, "NCG OUT OF RANGE"); return (0); }
379 if (sblock.fs_cpg < 1)
380 { badsb(listerr, "CPG OUT OF RANGE"); return (0); }
381 if (sblock.fs_ncg * sblock.fs_cpg < sblock.fs_ncyl ||
382 (sblock.fs_ncg - 1) * sblock.fs_cpg >= sblock.fs_ncyl)
383 { badsb(listerr, "NCYL LESS THAN NCG*CPG"); return (0); }
384 if (sblock.fs_sbsize > SBSIZE)
385 { badsb(listerr, "SIZE PREPOSTEROUSLY LARGE"); return (0); }
386 /*
387 * Compute block size that the filesystem is based on,
388 * according to fsbtodb, and adjust superblock block number
389 * so we can tell if this is an alternate later.
390 */
391 super *= dev_bsize;
392 dev_bsize = sblock.fs_fsize / fsbtodb(&sblock, 1);
393 sblk.b_bno = super / dev_bsize;
394 if (bflag) {
395 havesb = 1;
396 return (1);
397 }
398 /*
399 * Set all possible fields that could differ, then do check
400 * of whole super block against an alternate super block.
401 * When an alternate super-block is specified this check is skipped.
402 */
403 getblk(&asblk, cgsblock(&sblock, sblock.fs_ncg - 1), sblock.fs_sbsize);
404 if (asblk.b_errs)
405 return (0);
406 altsblock.fs_firstfield = sblock.fs_firstfield;
407 altsblock.fs_unused_1 = sblock.fs_unused_1;
408 altsblock.fs_time = sblock.fs_time;
409 altsblock.fs_cstotal = sblock.fs_cstotal;
410 altsblock.fs_cgrotor = sblock.fs_cgrotor;
411 altsblock.fs_fmod = sblock.fs_fmod;
412 altsblock.fs_clean = sblock.fs_clean;
413 altsblock.fs_ronly = sblock.fs_ronly;
414 altsblock.fs_flags = sblock.fs_flags;
415 altsblock.fs_maxcontig = sblock.fs_maxcontig;
416 altsblock.fs_minfree = sblock.fs_minfree;
417 altsblock.fs_optim = sblock.fs_optim;
418 altsblock.fs_rotdelay = sblock.fs_rotdelay;
419 altsblock.fs_maxbpg = sblock.fs_maxbpg;
420 memmove(altsblock.fs_ocsp, sblock.fs_ocsp, sizeof sblock.fs_ocsp);
421 altsblock.fs_csp = sblock.fs_csp;
422 altsblock.fs_maxcluster = sblock.fs_maxcluster;
423 altsblock.fs_contigdirs = sblock.fs_contigdirs;
424 altsblock.fs_active = sblock.fs_active;
425 altsblock.fs_avgfilesize = sblock.fs_avgfilesize;
426 altsblock.fs_avgfpdir = sblock.fs_avgfpdir;
427 altsblock.fs_pendingblocks = sblock.fs_pendingblocks;
428 altsblock.fs_pendinginodes = sblock.fs_pendinginodes;
429 memmove(altsblock.fs_fsmnt, sblock.fs_fsmnt, sizeof sblock.fs_fsmnt);
430 memmove(altsblock.fs_snapinum, sblock.fs_snapinum,
431 sizeof sblock.fs_snapinum);
432 memmove(altsblock.fs_sparecon,
433 sblock.fs_sparecon, sizeof sblock.fs_sparecon);
434 /*
435 * The following should not have to be copied.
436 */
437 altsblock.fs_fsbtodb = sblock.fs_fsbtodb;
438 altsblock.fs_interleave = sblock.fs_interleave;
439 altsblock.fs_npsect = sblock.fs_npsect;
440 altsblock.fs_nrpos = sblock.fs_nrpos;
441 altsblock.fs_state = sblock.fs_state;
442 altsblock.fs_qbmask = sblock.fs_qbmask;
443 altsblock.fs_qfmask = sblock.fs_qfmask;
444 altsblock.fs_state = sblock.fs_state;
445 altsblock.fs_maxfilesize = sblock.fs_maxfilesize;
446 if (memcmp(&sblock, &altsblock, (int)sblock.fs_sbsize)) {
447 if (debug) {
448 long *nlp, *olp, *endlp;
449
450 printf("superblock mismatches\n");
451 nlp = (long *)&altsblock;
452 olp = (long *)&sblock;
453 endlp = olp + (sblock.fs_sbsize / sizeof *olp);
454 for ( ; olp < endlp; olp++, nlp++) {
455 if (*olp == *nlp)
456 continue;
457 printf(
458 "offset %d, original %ld, alternate %ld\n",
459 olp - (long *)&sblock, *olp, *nlp);
460 }
461 }
462 badsb(listerr,
463 "VALUES IN SUPER BLOCK DISAGREE WITH THOSE IN FIRST ALTERNATE");
464 return (0);
465 }
466 havesb = 1;
467 return (1);
468}
469
470static void
471badsb(listerr, s)
472 int listerr;
473 char *s;
474{
475
476 if (!listerr)
477 return;
478 if (preen)
479 printf("%s: ", cdevname);
480 pfatal("BAD SUPER BLOCK: %s\n", s);
481}
482
483void
484sblock_init()
485{
486 struct disklabel *lp;
487
488 fswritefd = -1;
489 fsmodified = 0;
490 lfdir = 0;
491 initbarea(&sblk);
492 initbarea(&asblk);
493 sblk.b_un.b_buf = malloc(SBSIZE);
494 asblk.b_un.b_buf = malloc(SBSIZE);
495 if (sblk.b_un.b_buf == NULL || asblk.b_un.b_buf == NULL)
496 errx(EEXIT, "cannot allocate space for superblock");
497 if ((lp = getdisklabel(NULL, fsreadfd)))
498 dev_bsize = secsize = lp->d_secsize;
499 else
500 dev_bsize = secsize = DEV_BSIZE;
501}
502
503/*
504 * Calculate a prototype superblock based on information in the disk label.
505 * When done the cgsblock macro can be calculated and the fs_ncg field
506 * can be used. Do NOT attempt to use other macros without verifying that
507 * their needed information is available!
508 */
509static int
510calcsb(dev, devfd, fs)
511 char *dev;
512 int devfd;
|
518 int i;
519
520 cp = strchr(dev, '\0') - 1;
521 if (cp == (char *)-1 || ((*cp < 'a' || *cp > 'h') && !isdigit(*cp))) {
522 pfatal("%s: CANNOT FIGURE OUT FILE SYSTEM PARTITION\n", dev);
523 return (0);
524 }
525 lp = getdisklabel(dev, devfd);
526 if (isdigit(*cp))
527 pp = &lp->d_partitions[0];
528 else
529 pp = &lp->d_partitions[*cp - 'a'];
530 if (pp->p_fstype != FS_BSDFFS) {
531 pfatal("%s: NOT LABELED AS A BSD FILE SYSTEM (%s)\n",
532 dev, pp->p_fstype < FSMAXTYPES ?
533 fstypenames[pp->p_fstype] : "unknown");
534 return (0);
535 }
536 if (pp->p_fsize == 0 || pp->p_frag == 0 ||
537 pp->p_cpg == 0 || pp->p_size == 0) {
538 pfatal("%s: %s: type %s fsize %d, frag %d, cpg %d, size %d\n",
539 dev, "INCOMPLETE LABEL", fstypenames[pp->p_fstype],
540 pp->p_fsize, pp->p_frag, pp->p_cpg, pp->p_size);
541 return (0);
542 }
543 memset(fs, 0, sizeof(struct fs));
544 fs->fs_fsize = pp->p_fsize;
545 fs->fs_frag = pp->p_frag;
546 fs->fs_cpg = pp->p_cpg;
547 fs->fs_size = pp->p_size;
548 fs->fs_ntrak = lp->d_ntracks;
549 fs->fs_nsect = lp->d_nsectors;
550 fs->fs_spc = lp->d_secpercyl;
551 fs->fs_nspf = fs->fs_fsize / lp->d_secsize;
552 fs->fs_sblkno = roundup(
553 howmany(lp->d_bbsize + lp->d_sbsize, fs->fs_fsize),
554 fs->fs_frag);
555 fs->fs_cgmask = 0xffffffff;
556 for (i = fs->fs_ntrak; i > 1; i >>= 1)
557 fs->fs_cgmask <<= 1;
558 if (!POWEROF2(fs->fs_ntrak))
559 fs->fs_cgmask <<= 1;
560 fs->fs_cgoffset = roundup(
561 howmany(fs->fs_nsect, NSPF(fs)), fs->fs_frag);
562 fs->fs_fpg = (fs->fs_cpg * fs->fs_spc) / NSPF(fs);
563 fs->fs_ncg = howmany(fs->fs_size / fs->fs_spc, fs->fs_cpg);
564 for (fs->fs_fsbtodb = 0, i = NSPF(fs); i > 1; i >>= 1)
565 fs->fs_fsbtodb++;
566 dev_bsize = lp->d_secsize;
567 return (1);
568}
569
570static struct disklabel *
571getdisklabel(s, fd)
572 char *s;
573 int fd;
574{
575 static struct disklabel lab;
576
577 if (ioctl(fd, DIOCGDINFO, (char *)&lab) < 0) {
578 if (s == NULL)
579 return ((struct disklabel *)NULL);
580 pwarn("ioctl (GCINFO): %s\n", strerror(errno));
581 errx(EEXIT, "%s: can't read disk label", s);
582 }
583 return (&lab);
584}
| 518 int i;
519
520 cp = strchr(dev, '\0') - 1;
521 if (cp == (char *)-1 || ((*cp < 'a' || *cp > 'h') && !isdigit(*cp))) {
522 pfatal("%s: CANNOT FIGURE OUT FILE SYSTEM PARTITION\n", dev);
523 return (0);
524 }
525 lp = getdisklabel(dev, devfd);
526 if (isdigit(*cp))
527 pp = &lp->d_partitions[0];
528 else
529 pp = &lp->d_partitions[*cp - 'a'];
530 if (pp->p_fstype != FS_BSDFFS) {
531 pfatal("%s: NOT LABELED AS A BSD FILE SYSTEM (%s)\n",
532 dev, pp->p_fstype < FSMAXTYPES ?
533 fstypenames[pp->p_fstype] : "unknown");
534 return (0);
535 }
536 if (pp->p_fsize == 0 || pp->p_frag == 0 ||
537 pp->p_cpg == 0 || pp->p_size == 0) {
538 pfatal("%s: %s: type %s fsize %d, frag %d, cpg %d, size %d\n",
539 dev, "INCOMPLETE LABEL", fstypenames[pp->p_fstype],
540 pp->p_fsize, pp->p_frag, pp->p_cpg, pp->p_size);
541 return (0);
542 }
543 memset(fs, 0, sizeof(struct fs));
544 fs->fs_fsize = pp->p_fsize;
545 fs->fs_frag = pp->p_frag;
546 fs->fs_cpg = pp->p_cpg;
547 fs->fs_size = pp->p_size;
548 fs->fs_ntrak = lp->d_ntracks;
549 fs->fs_nsect = lp->d_nsectors;
550 fs->fs_spc = lp->d_secpercyl;
551 fs->fs_nspf = fs->fs_fsize / lp->d_secsize;
552 fs->fs_sblkno = roundup(
553 howmany(lp->d_bbsize + lp->d_sbsize, fs->fs_fsize),
554 fs->fs_frag);
555 fs->fs_cgmask = 0xffffffff;
556 for (i = fs->fs_ntrak; i > 1; i >>= 1)
557 fs->fs_cgmask <<= 1;
558 if (!POWEROF2(fs->fs_ntrak))
559 fs->fs_cgmask <<= 1;
560 fs->fs_cgoffset = roundup(
561 howmany(fs->fs_nsect, NSPF(fs)), fs->fs_frag);
562 fs->fs_fpg = (fs->fs_cpg * fs->fs_spc) / NSPF(fs);
563 fs->fs_ncg = howmany(fs->fs_size / fs->fs_spc, fs->fs_cpg);
564 for (fs->fs_fsbtodb = 0, i = NSPF(fs); i > 1; i >>= 1)
565 fs->fs_fsbtodb++;
566 dev_bsize = lp->d_secsize;
567 return (1);
568}
569
570static struct disklabel *
571getdisklabel(s, fd)
572 char *s;
573 int fd;
574{
575 static struct disklabel lab;
576
577 if (ioctl(fd, DIOCGDINFO, (char *)&lab) < 0) {
578 if (s == NULL)
579 return ((struct disklabel *)NULL);
580 pwarn("ioctl (GCINFO): %s\n", strerror(errno));
581 errx(EEXIT, "%s: can't read disk label", s);
582 }
583 return (&lab);
584}
|