Commit | Line | Data |
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76797561 DF |
1 | /* |
2 | * Copyright (c) 1980 Regents of the University of California. | |
3 | * All rights reserved. The Berkeley software License Agreement | |
4 | * specifies the terms and conditions for redistribution. | |
5 | */ | |
6 | ||
eb93b62a | 7 | #ifndef lint |
adc5a10c | 8 | static char sccsid[] = "@(#)setup.c 5.19 (Berkeley) %G%"; |
76797561 | 9 | #endif not lint |
eb93b62a | 10 | |
c7aed003 | 11 | #define DKTYPENAMES |
eb93b62a KM |
12 | #include <sys/param.h> |
13 | #include <sys/inode.h> | |
14 | #include <sys/fs.h> | |
15 | #include <sys/stat.h> | |
c7aed003 KM |
16 | #include <sys/ioctl.h> |
17 | #include <sys/disklabel.h> | |
18 | #include <sys/file.h> | |
7beeecfc | 19 | #include <machine/endian.h> |
c7aed003 | 20 | #include <ctype.h> |
eb93b62a KM |
21 | #include "fsck.h" |
22 | ||
7beeecfc | 23 | BUFAREA asblk; |
adc5a10c | 24 | #define altsblock (*asblk.b_un.b_fs) |
c7aed003 KM |
25 | #define POWEROF2(num) (((num) & ((num) - 1)) == 0) |
26 | ||
eb93b62a | 27 | char *calloc(); |
c7aed003 | 28 | char *index(); |
eb93b62a KM |
29 | |
30 | setup(dev) | |
31 | char *dev; | |
32 | { | |
33 | dev_t rootdev; | |
05d069d3 | 34 | long cg, ncg, size, asked, i, j; |
55f8bbd7 | 35 | struct disklabel *getdisklabel(), *lp; |
eb93b62a | 36 | struct stat statb; |
c7aed003 | 37 | struct fs proto; |
eb93b62a | 38 | |
55f8bbd7 | 39 | havesb = 0; |
eb93b62a KM |
40 | if (stat("/", &statb) < 0) |
41 | errexit("Can't stat root\n"); | |
42 | rootdev = statb.st_dev; | |
43 | if (stat(dev, &statb) < 0) { | |
cfbff64d | 44 | perror(dev); |
7718c0e6 | 45 | printf("Can't stat %s\n", dev); |
eb93b62a KM |
46 | return (0); |
47 | } | |
48 | rawflg = 0; | |
49 | if ((statb.st_mode & S_IFMT) == S_IFBLK) | |
50 | ; | |
51 | else if ((statb.st_mode & S_IFMT) == S_IFCHR) | |
52 | rawflg++; | |
53 | else { | |
54 | if (reply("file is not a block or character device; OK") == 0) | |
55 | return (0); | |
56 | } | |
57 | if (rootdev == statb.st_rdev) | |
58 | hotroot++; | |
c7aed003 | 59 | if ((dfile.rfdes = open(dev, O_RDONLY)) < 0) { |
cfbff64d | 60 | perror(dev); |
7718c0e6 | 61 | printf("Can't open %s\n", dev); |
eb93b62a KM |
62 | return (0); |
63 | } | |
64 | if (preen == 0) | |
65 | printf("** %s", dev); | |
c7aed003 | 66 | if (nflag || (dfile.wfdes = open(dev, O_WRONLY)) < 0) { |
eb93b62a KM |
67 | dfile.wfdes = -1; |
68 | if (preen) | |
69 | pfatal("NO WRITE ACCESS"); | |
70 | printf(" (NO WRITE)"); | |
71 | } | |
72 | if (preen == 0) | |
73 | printf("\n"); | |
eb93b62a | 74 | dfile.mod = 0; |
eb93b62a | 75 | lfdir = 0; |
eb93b62a | 76 | initbarea(&sblk); |
7beeecfc | 77 | initbarea(&asblk); |
adc5a10c KM |
78 | sblk.b_un.b_buf = (char *)malloc(SBSIZE); |
79 | asblk.b_un.b_buf = (char *)malloc(SBSIZE); | |
80 | if (sblk.b_un.b_buf == 0 || asblk.b_un.b_buf == 0) | |
81 | errexit("cannot allocate space for superblock\n"); | |
55f8bbd7 MK |
82 | if (lp = getdisklabel((char *)NULL, dfile.rfdes)) |
83 | dev_bsize = secsize = lp->d_secsize; | |
7beeecfc KM |
84 | else |
85 | dev_bsize = secsize = DEV_BSIZE; | |
eb93b62a | 86 | /* |
c7aed003 | 87 | * Read in the superblock, looking for alternates if necessary |
eb93b62a | 88 | */ |
c7aed003 | 89 | if (readsb(1) == 0) { |
55f8bbd7 | 90 | if (bflag || preen || calcsb(dev, dfile.rfdes, &proto) == 0) |
c7aed003 KM |
91 | return(0); |
92 | if (reply("LOOK FOR ALTERNATE SUPERBLOCKS") == 0) | |
93 | return (0); | |
94 | for (cg = 0; cg < proto.fs_ncg; cg++) { | |
95 | bflag = fsbtodb(&proto, cgsblock(&proto, cg)); | |
96 | if (readsb(0) != 0) | |
97 | break; | |
98 | } | |
99 | if (cg >= proto.fs_ncg) { | |
100 | printf("%s %s\n%s %s\n%s %s\n", | |
101 | "SEARCH FOR ALTERNATE SUPER-BLOCK", | |
102 | "FAILED. YOU MUST USE THE", | |
103 | "-b OPTION TO FSCK TO SPECIFY THE", | |
104 | "LOCATION OF AN ALTERNATE", | |
105 | "SUPER-BLOCK TO SUPPLY NEEDED", | |
106 | "INFORMATION; SEE fsck(8)."); | |
107 | return(0); | |
108 | } | |
109 | pwarn("USING ALTERNATE SUPERBLOCK AT %d\n", bflag); | |
110 | } | |
111 | fmax = sblock.fs_size; | |
112 | imax = sblock.fs_ncg * sblock.fs_ipg; | |
d9f38d60 KM |
113 | /* |
114 | * Check and potentially fix certain fields in the super block. | |
115 | */ | |
116 | if (sblock.fs_optim != FS_OPTTIME && sblock.fs_optim != FS_OPTSPACE) { | |
117 | pfatal("UNDEFINED OPTIMIZATION IN SUPERBLOCK"); | |
118 | if (reply("SET TO DEFAULT") == 1) { | |
119 | sblock.fs_optim = FS_OPTTIME; | |
120 | sbdirty(); | |
121 | } | |
122 | } | |
123 | if ((sblock.fs_minfree < 0 || sblock.fs_minfree > 99)) { | |
124 | pfatal("IMPOSSIBLE MINFREE=%d IN SUPERBLOCK", | |
125 | sblock.fs_minfree); | |
126 | if (reply("SET TO DEFAULT") == 1) { | |
127 | sblock.fs_minfree = 10; | |
128 | sbdirty(); | |
129 | } | |
130 | } | |
d4af1a46 | 131 | if (sblock.fs_interleave < 1) { |
d4af1a46 | 132 | sblock.fs_interleave); |
43171015 | 133 | sblock.fs_interleave = 1; |
d4af1a46 | 134 | sbdirty(); |
7beeecfc KM |
135 | dirty(&asblk); |
136 | } | |
d4af1a46 KM |
137 | } |
138 | if (sblock.fs_npsect < sblock.fs_nsect) { | |
d4af1a46 | 139 | sblock.fs_npsect); |
43171015 | 140 | sblock.fs_npsect = sblock.fs_nsect; |
d4af1a46 | 141 | sbdirty(); |
7beeecfc KM |
142 | dirty(&asblk); |
143 | } | |
144 | } | |
a747b5d4 KM |
145 | if (cvtflag) { |
146 | if (sblock.fs_postblformat == FS_42POSTBLFMT) { | |
147 | /* | |
148 | * Requested to convert from old format to new format | |
149 | */ | |
150 | if (preen) | |
151 | pwarn("CONVERTING TO NEW FILE SYSTEM FORMAT\n"); | |
152 | else if (!reply("CONVERT TO NEW FILE SYSTEM FORMAT")) | |
153 | return(0); | |
7beeecfc KM |
154 | sblock.fs_postblformat = FS_DYNAMICPOSTBLFMT; |
155 | sblock.fs_nrpos = 8; | |
156 | sblock.fs_postbloff = | |
157 | (char *)(&sblock.fs_opostbl[0][0]) - | |
158 | (char *)(&sblock.fs_link); | |
159 | sblock.fs_rotbloff = &sblock.fs_space[0] - | |
160 | (u_char *)(&sblock.fs_link); | |
161 | /* | |
162 | * Planning now for future expansion. | |
163 | */ | |
164 | # if (BYTE_ORDER == BIG_ENDIAN) | |
165 | sblock.fs_qbmask.val[0] = 0; | |
166 | sblock.fs_qbmask.val[1] = ~sblock.fs_bmask; | |
167 | sblock.fs_qfmask.val[0] = 0; | |
168 | sblock.fs_qfmask.val[1] = ~sblock.fs_fmask; | |
169 | # endif /* BIG_ENDIAN */ | |
170 | # if (BYTE_ORDER == LITTLE_ENDIAN) | |
171 | sblock.fs_qbmask.val[0] = ~sblock.fs_bmask; | |
172 | sblock.fs_qbmask.val[1] = 0; | |
173 | sblock.fs_qfmask.val[0] = ~sblock.fs_fmask; | |
174 | sblock.fs_qfmask.val[1] = 0; | |
175 | # endif /* LITTLE_ENDIAN */ | |
176 | sbdirty(); | |
177 | dirty(&asblk); | |
a747b5d4 KM |
178 | } else if (sblock.fs_postblformat == FS_DYNAMICPOSTBLFMT) { |
179 | /* | |
180 | * Requested to convert from new format to old format | |
181 | */ | |
182 | if (sblock.fs_nrpos != 8 || sblock.fs_ipg > 2048 || | |
183 | sblock.fs_cpg > 32 || sblock.fs_cpc > 16) { | |
184 | printf( | |
185 | "PARAMETERS OF CURRENT FILE SYSTEM DO NOT\n\t"); | |
186 | errexit( | |
187 | "ALLOW CONVERSION TO OLD FILE SYSTEM FORMAT\n"); | |
188 | } | |
189 | if (preen) | |
190 | pwarn("CONVERTING TO OLD FILE SYSTEM FORMAT\n"); | |
191 | else if (!reply("CONVERT TO OLD FILE SYSTEM FORMAT")) | |
192 | return(0); | |
193 | sblock.fs_postblformat = FS_42POSTBLFMT; | |
194 | sbdirty(); | |
195 | dirty(&asblk); | |
196 | } else { | |
197 | errexit("UNKNOWN FILE SYSTEM FORMAT\n"); | |
7beeecfc | 198 | } |
7beeecfc KM |
199 | } |
200 | if (asblk.b_dirty) { | |
201 | bcopy((char *)&sblock, (char *)&altsblock, sblock.fs_sbsize); | |
202 | flush(&dfile, &asblk); | |
d4af1a46 | 203 | } |
eb93b62a KM |
204 | /* |
205 | * read in the summary info. | |
206 | */ | |
05d069d3 | 207 | asked = 0; |
eb93b62a KM |
208 | for (i = 0, j = 0; i < sblock.fs_cssize; i += sblock.fs_bsize, j++) { |
209 | size = sblock.fs_cssize - i < sblock.fs_bsize ? | |
210 | sblock.fs_cssize - i : sblock.fs_bsize; | |
211 | sblock.fs_csp[j] = (struct csum *)calloc(1, (unsigned)size); | |
212 | if (bread(&dfile, (char *)sblock.fs_csp[j], | |
213 | fsbtodb(&sblock, sblock.fs_csaddr + j * sblock.fs_frag), | |
05d069d3 KM |
214 | size) != 0 && !asked) { |
215 | pfatal("BAD SUMMARY INFORMATION"); | |
216 | if (reply("CONTINUE") == 0) | |
217 | errexit(""); | |
218 | asked++; | |
219 | } | |
eb93b62a KM |
220 | } |
221 | /* | |
222 | * allocate and initialize the necessary maps | |
223 | */ | |
224 | bmapsz = roundup(howmany(fmax, NBBY), sizeof(short)); | |
225 | blockmap = calloc((unsigned)bmapsz, sizeof (char)); | |
226 | if (blockmap == NULL) { | |
227 | printf("cannot alloc %d bytes for blockmap\n", bmapsz); | |
228 | goto badsb; | |
229 | } | |
eb93b62a KM |
230 | statemap = calloc((unsigned)(imax + 1), sizeof(char)); |
231 | if (statemap == NULL) { | |
232 | printf("cannot alloc %d bytes for statemap\n", imax + 1); | |
233 | goto badsb; | |
234 | } | |
235 | lncntp = (short *)calloc((unsigned)(imax + 1), sizeof(short)); | |
236 | if (lncntp == NULL) { | |
237 | printf("cannot alloc %d bytes for lncntp\n", | |
238 | (imax + 1) * sizeof(short)); | |
239 | goto badsb; | |
240 | } | |
eb93b62a | 241 | |
adc5a10c | 242 | bufinit(); |
eb93b62a KM |
243 | return (1); |
244 | ||
245 | badsb: | |
246 | ckfini(); | |
247 | return (0); | |
c7aed003 KM |
248 | } |
249 | ||
250 | /* | |
251 | * Read in the super block and its summary info. | |
252 | */ | |
253 | readsb(listerr) | |
254 | int listerr; | |
255 | { | |
55f8bbd7 MK |
256 | off_t sboff; |
257 | daddr_t super = bflag ? bflag : SBOFF / dev_bsize; | |
c7aed003 | 258 | |
c7aed003 KM |
259 | if (bread(&dfile, (char *)&sblock, super, (long)SBSIZE) != 0) |
260 | return (0); | |
261 | sblk.b_bno = super; | |
262 | sblk.b_size = SBSIZE; | |
263 | /* | |
264 | * run a few consistency checks of the super block | |
265 | */ | |
266 | if (sblock.fs_magic != FS_MAGIC) | |
267 | { badsb(listerr, "MAGIC NUMBER WRONG"); return (0); } | |
268 | if (sblock.fs_ncg < 1) | |
269 | { badsb(listerr, "NCG OUT OF RANGE"); return (0); } | |
7beeecfc | 270 | if (sblock.fs_cpg < 1) |
c7aed003 KM |
271 | { badsb(listerr, "CPG OUT OF RANGE"); return (0); } |
272 | if (sblock.fs_ncg * sblock.fs_cpg < sblock.fs_ncyl || | |
273 | (sblock.fs_ncg - 1) * sblock.fs_cpg >= sblock.fs_ncyl) | |
274 | { badsb(listerr, "NCYL LESS THAN NCG*CPG"); return (0); } | |
275 | if (sblock.fs_sbsize > SBSIZE) | |
276 | { badsb(listerr, "SIZE PREPOSTEROUSLY LARGE"); return (0); } | |
55f8bbd7 MK |
277 | /* |
278 | * Compute block size that the filesystem is based on, | |
279 | * according to fsbtodb, and adjust superblock block number | |
280 | * so we can tell if this is an alternate later. | |
281 | */ | |
55f8bbd7 MK |
282 | super *= dev_bsize; |
283 | dev_bsize = sblock.fs_fsize / fsbtodb(&sblock, 1); | |
284 | sblk.b_bno = super / dev_bsize; | |
c7aed003 KM |
285 | /* |
286 | * Set all possible fields that could differ, then do check | |
287 | * of whole super block against an alternate super block. | |
288 | * When an alternate super-block is specified this check is skipped. | |
289 | */ | |
7beeecfc KM |
290 | getblk(&asblk, cgsblock(&sblock, sblock.fs_ncg - 1), sblock.fs_sbsize); |
291 | if (asblk.b_errs != NULL) | |
292 | return (0); | |
55f8bbd7 MK |
293 | if (bflag) { |
294 | havesb = 1; | |
c7aed003 | 295 | return (1); |
55f8bbd7 | 296 | } |
c7aed003 KM |
297 | altsblock.fs_link = sblock.fs_link; |
298 | altsblock.fs_rlink = sblock.fs_rlink; | |
299 | altsblock.fs_time = sblock.fs_time; | |
300 | altsblock.fs_cstotal = sblock.fs_cstotal; | |
301 | altsblock.fs_cgrotor = sblock.fs_cgrotor; | |
302 | altsblock.fs_fmod = sblock.fs_fmod; | |
303 | altsblock.fs_clean = sblock.fs_clean; | |
304 | altsblock.fs_ronly = sblock.fs_ronly; | |
305 | altsblock.fs_flags = sblock.fs_flags; | |
306 | altsblock.fs_maxcontig = sblock.fs_maxcontig; | |
307 | altsblock.fs_minfree = sblock.fs_minfree; | |
308 | altsblock.fs_optim = sblock.fs_optim; | |
309 | altsblock.fs_rotdelay = sblock.fs_rotdelay; | |
310 | altsblock.fs_maxbpg = sblock.fs_maxbpg; | |
311 | bcopy((char *)sblock.fs_csp, (char *)altsblock.fs_csp, | |
312 | sizeof sblock.fs_csp); | |
313 | bcopy((char *)sblock.fs_fsmnt, (char *)altsblock.fs_fsmnt, | |
314 | sizeof sblock.fs_fsmnt); | |
cfbff64d MK |
315 | bcopy((char *)sblock.fs_sparecon, (char *)altsblock.fs_sparecon, |
316 | sizeof sblock.fs_sparecon); | |
7beeecfc KM |
317 | /* |
318 | * The following should not have to be copied. | |
319 | */ | |
320 | altsblock.fs_fsbtodb = sblock.fs_fsbtodb; | |
321 | altsblock.fs_interleave = sblock.fs_interleave; | |
322 | altsblock.fs_npsect = sblock.fs_npsect; | |
323 | altsblock.fs_nrpos = sblock.fs_nrpos; | |
cfbff64d MK |
324 | if (bcmp((char *)&sblock, (char *)&altsblock, (int)sblock.fs_sbsize)) { |
325 | badsb(listerr, | |
326 | "VALUES IN SUPER BLOCK DISAGREE WITH THOSE IN FIRST ALTERNATE"); | |
327 | return (0); | |
328 | } | |
55f8bbd7 | 329 | havesb = 1; |
c7aed003 | 330 | return (1); |
eb93b62a KM |
331 | } |
332 | ||
c7aed003 KM |
333 | badsb(listerr, s) |
334 | int listerr; | |
eb93b62a KM |
335 | char *s; |
336 | { | |
337 | ||
c7aed003 KM |
338 | if (!listerr) |
339 | return; | |
eb93b62a KM |
340 | if (preen) |
341 | printf("%s: ", devname); | |
c7aed003 KM |
342 | pfatal("BAD SUPER BLOCK: %s\n", s); |
343 | } | |
344 | ||
345 | /* | |
346 | * Calculate a prototype superblock based on information in the disk label. | |
347 | * When done the cgsblock macro can be calculated and the fs_ncg field | |
348 | * can be used. Do NOT attempt to use other macros without verifying that | |
349 | * their needed information is available! | |
350 | */ | |
351 | calcsb(dev, devfd, fs) | |
352 | char *dev; | |
353 | int devfd; | |
354 | register struct fs *fs; | |
355 | { | |
356 | register struct disklabel *lp; | |
357 | register struct partition *pp; | |
358 | register char *cp; | |
c7aed003 | 359 | int i; |
f10a0ae9 | 360 | struct disklabel *getdisklabel(); |
c7aed003 KM |
361 | |
362 | cp = index(dev, '\0') - 1; | |
363 | if (cp == (char *)-1 || (*cp < 'a' || *cp > 'h') && !isdigit(*cp)) { | |
364 | pfatal("%s: CANNOT FIGURE OUT FILE SYSTEM PARTITION\n", dev); | |
365 | return (0); | |
366 | } | |
367 | lp = getdisklabel(dev, devfd); | |
368 | if (isdigit(*cp)) | |
369 | pp = &lp->d_partitions[0]; | |
370 | else | |
371 | pp = &lp->d_partitions[*cp - 'a']; | |
372 | if (pp->p_fstype != FS_BSDFFS) { | |
55f8bbd7 | 373 | pfatal("%s: NOT LABELED AS A BSD FILE SYSTEM (%s)\n", |
c7aed003 KM |
374 | dev, pp->p_fstype < FSMAXTYPES ? |
375 | fstypenames[pp->p_fstype] : "unknown"); | |
376 | return (0); | |
377 | } | |
378 | bzero(fs, sizeof(struct fs)); | |
379 | fs->fs_fsize = pp->p_fsize; | |
380 | fs->fs_frag = pp->p_frag; | |
381 | fs->fs_cpg = pp->p_cpg; | |
382 | fs->fs_size = pp->p_size; | |
383 | fs->fs_ntrak = lp->d_ntracks; | |
384 | fs->fs_nsect = lp->d_nsectors; | |
385 | fs->fs_spc = lp->d_secpercyl; | |
386 | fs->fs_nspf = fs->fs_fsize / lp->d_secsize; | |
387 | fs->fs_sblkno = roundup( | |
388 | howmany(lp->d_bbsize + lp->d_sbsize, fs->fs_fsize), | |
389 | fs->fs_frag); | |
390 | fs->fs_cgmask = 0xffffffff; | |
391 | for (i = fs->fs_ntrak; i > 1; i >>= 1) | |
392 | fs->fs_cgmask <<= 1; | |
393 | if (!POWEROF2(fs->fs_ntrak)) | |
394 | fs->fs_cgmask <<= 1; | |
395 | fs->fs_cgoffset = roundup( | |
396 | howmany(fs->fs_nsect, NSPF(fs)), fs->fs_frag); | |
397 | fs->fs_fpg = (fs->fs_cpg * fs->fs_spc) / NSPF(fs); | |
398 | fs->fs_ncg = howmany(fs->fs_size / fs->fs_spc, fs->fs_cpg); | |
399 | for (fs->fs_fsbtodb = 0, i = NSPF(fs); i > 1; i >>= 1) | |
400 | fs->fs_fsbtodb++; | |
55f8bbd7 | 401 | dev_bsize = lp->d_secsize; |
c7aed003 KM |
402 | return (1); |
403 | } | |
404 | ||
c7aed003 KM |
405 | struct disklabel * |
406 | getdisklabel(s, fd) | |
407 | char *s; | |
408 | int fd; | |
409 | { | |
410 | static struct disklabel lab; | |
411 | ||
412 | if (ioctl(fd, DIOCGDINFO, (char *)&lab) < 0) { | |
919c85da MK |
413 | if (s == NULL) |
414 | return ((struct disklabel *)NULL); | |
cfbff64d | 415 | pwarn(""); |
c7aed003 | 416 | perror("ioctl (GDINFO)"); |
cfbff64d | 417 | errexit("%s: can't read disk label", s); |
c7aed003 KM |
418 | } |
419 | return (&lab); | |
420 | } |