Commit | Line | Data |
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19538291 | 1 | /* |
1bcf18f3 KM |
2 | * Copyright (c) 1980, 1989 The Regents of the University of California. |
3 | * All rights reserved. | |
4 | * | |
5 | * Redistribution and use in source and binary forms are permitted | |
6 | * provided that the above copyright notice and this paragraph are | |
7 | * duplicated in all such forms and that any documentation, | |
8 | * advertising materials, and other materials related to such | |
9 | * distribution and use acknowledge that the software was developed | |
10 | * by the University of California, Berkeley. The name of the | |
11 | * University may not be used to endorse or promote products derived | |
12 | * from this software without specific prior written permission. | |
13 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR | |
14 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED | |
15 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. | |
19538291 DF |
16 | */ |
17 | ||
18 | #ifndef lint | |
73acce1d | 19 | static char sccsid[] = "@(#)mkfs.c 6.13 (Berkeley) %G%"; |
1bcf18f3 | 20 | #endif /* not lint */ |
d746d022 | 21 | |
d746d022 KM |
22 | #ifndef STANDALONE |
23 | #include <stdio.h> | |
24 | #include <a.out.h> | |
25 | #endif | |
26 | ||
45eb394d | 27 | #include <sys/param.h> |
e6c352bc | 28 | #include <sys/time.h> |
1bcf18f3 KM |
29 | #include <sys/wait.h> |
30 | #include <sys/resource.h> | |
73acce1d | 31 | #include <ufs/dinode.h> |
e6c352bc KM |
32 | #include <ufs/fs.h> |
33 | #include <ufs/dir.h> | |
8485bb11 | 34 | #include <sys/disklabel.h> |
62f283da KM |
35 | #include <machine/endian.h> |
36 | ||
37 | /* | |
38 | * make file system for cylinder-group style file systems | |
39 | */ | |
40 | ||
41 | /* | |
42 | * The size of a cylinder group is calculated by CGSIZE. The maximum size | |
43 | * is limited by the fact that cylinder groups are at most one block. | |
44 | * Its size is derived from the size of the maps maintained in the | |
45 | * cylinder group and the (struct cg) size. | |
46 | */ | |
47 | #define CGSIZE(fs) \ | |
48 | /* base cg */ (sizeof(struct cg) + \ | |
49 | /* blktot size */ (fs)->fs_cpg * sizeof(long) + \ | |
50 | /* blks size */ (fs)->fs_cpg * (fs)->fs_nrpos * sizeof(short) + \ | |
51 | /* inode map */ howmany((fs)->fs_ipg, NBBY) + \ | |
52 | /* block map */ howmany((fs)->fs_cpg * (fs)->fs_spc / NSPF(fs), NBBY)) | |
53 | ||
54 | /* | |
55 | * We limit the size of the inode map to be no more than a | |
56 | * third of the cylinder group space, since we must leave at | |
57 | * least an equal amount of space for the block map. | |
58 | * | |
59 | * N.B.: MAXIPG must be a multiple of INOPB(fs). | |
60 | */ | |
61 | #define MAXIPG(fs) roundup((fs)->fs_bsize * NBBY / 3, INOPB(fs)) | |
8485bb11 | 62 | |
2fd3d252 | 63 | #define UMASK 0755 |
c312eebd | 64 | #define MAXINOPB (MAXBSIZE / sizeof(struct dinode)) |
2fd3d252 | 65 | #define POWEROF2(num) (((num) & ((num) - 1)) == 0) |
d746d022 | 66 | |
8485bb11 KM |
67 | /* |
68 | * variables set up by front end. | |
69 | */ | |
822f4068 | 70 | extern int mfs; /* run as the memory based filesystem */ |
a20edd44 KM |
71 | extern int Nflag; /* run mkfs without writing file system */ |
72 | extern int fssize; /* file system size */ | |
73 | extern int ntracks; /* # tracks/cylinder */ | |
74 | extern int nsectors; /* # sectors/track */ | |
75 | extern int nphyssectors; /* # sectors/track including spares */ | |
76 | extern int secpercyl; /* sectors per cylinder */ | |
77 | extern int sectorsize; /* bytes/sector */ | |
78 | extern int rpm; /* revolutions/minute of drive */ | |
79 | extern int interleave; /* hardware sector interleave */ | |
80 | extern int trackskew; /* sector 0 skew, per track */ | |
81 | extern int headswitch; /* head switch time, usec */ | |
82 | extern int trackseek; /* track-to-track seek, usec */ | |
83 | extern int fsize; /* fragment size */ | |
84 | extern int bsize; /* block size */ | |
85 | extern int cpg; /* cylinders/cylinder group */ | |
7292dd7c | 86 | extern int cpgflg; /* cylinders/cylinder group flag was given */ |
a20edd44 KM |
87 | extern int minfree; /* free space threshold */ |
88 | extern int opt; /* optimization preference (space or time) */ | |
89 | extern int density; /* number of bytes per inode */ | |
90 | extern int maxcontig; /* max contiguous blocks to allocate */ | |
91 | extern int rotdelay; /* rotational delay between blocks */ | |
3d632f12 | 92 | extern int maxbpg; /* maximum blocks per file in a cyl group */ |
62f283da | 93 | extern int nrpos; /* # of distinguished rotational positions */ |
c5d3fd78 MK |
94 | extern int bbsize; /* boot block size */ |
95 | extern int sbsize; /* superblock size */ | |
1bcf18f3 KM |
96 | extern u_long memleft; /* virtual memory available */ |
97 | extern caddr_t membase; /* start address of memory based filesystem */ | |
98 | extern caddr_t malloc(), calloc(); | |
8485bb11 | 99 | |
d746d022 KM |
100 | union { |
101 | struct fs fs; | |
62f283da | 102 | char pad[SBSIZE]; |
d746d022 KM |
103 | } fsun; |
104 | #define sblock fsun.fs | |
105 | struct csum *fscs; | |
106 | ||
107 | union { | |
108 | struct cg cg; | |
b6407c9d | 109 | char pad[MAXBSIZE]; |
d746d022 KM |
110 | } cgun; |
111 | #define acg cgun.cg | |
112 | ||
62f283da | 113 | struct dinode zino[MAXBSIZE / sizeof(struct dinode)]; |
2fd3d252 | 114 | |
8485bb11 | 115 | int fsi, fso; |
2fd3d252 | 116 | time_t utime; |
d746d022 KM |
117 | daddr_t alloc(); |
118 | ||
8485bb11 KM |
119 | mkfs(pp, fsys, fi, fo) |
120 | struct partition *pp; | |
121 | char *fsys; | |
122 | int fi, fo; | |
d746d022 | 123 | { |
7292dd7c KM |
124 | register long i, mincpc, mincpg, inospercg; |
125 | long cylno, rpos, blk, j, warn = 0; | |
126 | long used, mincpgcnt, bpcg; | |
127 | long mapcramped, inodecramped; | |
62f283da | 128 | long postblsize, rotblsize, totalsbsize; |
1bcf18f3 | 129 | int ppid, status, started(); |
d746d022 | 130 | |
d746d022 KM |
131 | #ifndef STANDALONE |
132 | time(&utime); | |
2fd3d252 | 133 | #endif |
822f4068 | 134 | if (mfs) { |
1bcf18f3 KM |
135 | ppid = getpid(); |
136 | (void) signal(SIGUSR1, started); | |
137 | if (i = fork()) { | |
138 | if (i == -1) { | |
822f4068 | 139 | perror("mfs"); |
1bcf18f3 KM |
140 | exit(10); |
141 | } | |
142 | if (waitpid(i, &status, 0) != -1 && WIFEXITED(status)) | |
143 | exit(WEXITSTATUS(status)); | |
144 | exit(11); | |
145 | /* NOTREACHED */ | |
146 | } | |
147 | (void)malloc(0); | |
148 | if (fssize * sectorsize > memleft) | |
149 | fssize = (memleft - 16384) / sectorsize; | |
150 | if ((membase = malloc(fssize * sectorsize)) == 0) | |
151 | exit(12); | |
152 | } | |
8485bb11 KM |
153 | fsi = fi; |
154 | fso = fo; | |
51fe1c64 KM |
155 | /* |
156 | * Validate the given file system size. | |
157 | * Verify that its last block can actually be accessed. | |
158 | */ | |
2fd3d252 | 159 | if (fssize <= 0) |
1bcf18f3 | 160 | printf("preposterous size %d\n", fssize), exit(13); |
8485bb11 | 161 | wtfs(fssize - 1, sectorsize, (char *)&sblock); |
2fd3d252 KM |
162 | /* |
163 | * collect and verify the sector and track info | |
164 | */ | |
8485bb11 KM |
165 | sblock.fs_nsect = nsectors; |
166 | sblock.fs_ntrak = ntracks; | |
2fd3d252 | 167 | if (sblock.fs_ntrak <= 0) |
1bcf18f3 | 168 | printf("preposterous ntrak %d\n", sblock.fs_ntrak), exit(14); |
2fd3d252 | 169 | if (sblock.fs_nsect <= 0) |
1bcf18f3 | 170 | printf("preposterous nsect %d\n", sblock.fs_nsect), exit(15); |
2fd3d252 KM |
171 | /* |
172 | * collect and verify the block and fragment sizes | |
173 | */ | |
8485bb11 KM |
174 | sblock.fs_bsize = bsize; |
175 | sblock.fs_fsize = fsize; | |
2fd3d252 KM |
176 | if (!POWEROF2(sblock.fs_bsize)) { |
177 | printf("block size must be a power of 2, not %d\n", | |
178 | sblock.fs_bsize); | |
1bcf18f3 | 179 | exit(16); |
d746d022 | 180 | } |
2fd3d252 KM |
181 | if (!POWEROF2(sblock.fs_fsize)) { |
182 | printf("fragment size must be a power of 2, not %d\n", | |
183 | sblock.fs_fsize); | |
1bcf18f3 | 184 | exit(17); |
d746d022 | 185 | } |
8485bb11 | 186 | if (sblock.fs_fsize < sectorsize) { |
b6407c9d | 187 | printf("fragment size %d is too small, minimum is %d\n", |
8485bb11 | 188 | sblock.fs_fsize, sectorsize); |
1bcf18f3 | 189 | exit(18); |
b6407c9d KM |
190 | } |
191 | if (sblock.fs_bsize < MINBSIZE) { | |
192 | printf("block size %d is too small, minimum is %d\n", | |
193 | sblock.fs_bsize, MINBSIZE); | |
1bcf18f3 | 194 | exit(19); |
b6407c9d | 195 | } |
2fd3d252 KM |
196 | if (sblock.fs_bsize < sblock.fs_fsize) { |
197 | printf("block size (%d) cannot be smaller than fragment size (%d)\n", | |
198 | sblock.fs_bsize, sblock.fs_fsize); | |
1bcf18f3 | 199 | exit(20); |
d746d022 | 200 | } |
3352e84a KM |
201 | sblock.fs_bmask = ~(sblock.fs_bsize - 1); |
202 | sblock.fs_fmask = ~(sblock.fs_fsize - 1); | |
62f283da KM |
203 | /* |
204 | * Planning now for future expansion. | |
205 | */ | |
206 | # if (BYTE_ORDER == BIG_ENDIAN) | |
207 | sblock.fs_qbmask.val[0] = 0; | |
208 | sblock.fs_qbmask.val[1] = ~sblock.fs_bmask; | |
209 | sblock.fs_qfmask.val[0] = 0; | |
210 | sblock.fs_qfmask.val[1] = ~sblock.fs_fmask; | |
211 | # endif /* BIG_ENDIAN */ | |
212 | # if (BYTE_ORDER == LITTLE_ENDIAN) | |
213 | sblock.fs_qbmask.val[0] = ~sblock.fs_bmask; | |
214 | sblock.fs_qbmask.val[1] = 0; | |
215 | sblock.fs_qfmask.val[0] = ~sblock.fs_fmask; | |
216 | sblock.fs_qfmask.val[1] = 0; | |
217 | # endif /* LITTLE_ENDIAN */ | |
3352e84a KM |
218 | for (sblock.fs_bshift = 0, i = sblock.fs_bsize; i > 1; i >>= 1) |
219 | sblock.fs_bshift++; | |
220 | for (sblock.fs_fshift = 0, i = sblock.fs_fsize; i > 1; i >>= 1) | |
221 | sblock.fs_fshift++; | |
222 | sblock.fs_frag = numfrags(&sblock, sblock.fs_bsize); | |
19782540 KM |
223 | for (sblock.fs_fragshift = 0, i = sblock.fs_frag; i > 1; i >>= 1) |
224 | sblock.fs_fragshift++; | |
2fd3d252 KM |
225 | if (sblock.fs_frag > MAXFRAG) { |
226 | printf("fragment size %d is too small, minimum with block size %d is %d\n", | |
227 | sblock.fs_fsize, sblock.fs_bsize, | |
228 | sblock.fs_bsize / MAXFRAG); | |
1bcf18f3 | 229 | exit(21); |
d746d022 | 230 | } |
62f283da | 231 | sblock.fs_nrpos = nrpos; |
19782540 KM |
232 | sblock.fs_nindir = sblock.fs_bsize / sizeof(daddr_t); |
233 | sblock.fs_inopb = sblock.fs_bsize / sizeof(struct dinode); | |
8485bb11 KM |
234 | sblock.fs_nspf = sblock.fs_fsize / sectorsize; |
235 | for (sblock.fs_fsbtodb = 0, i = NSPF(&sblock); i > 1; i >>= 1) | |
19782540 | 236 | sblock.fs_fsbtodb++; |
bf541624 | 237 | sblock.fs_sblkno = |
c5d3fd78 | 238 | roundup(howmany(bbsize + sbsize, sblock.fs_fsize), sblock.fs_frag); |
bf541624 | 239 | sblock.fs_cblkno = (daddr_t)(sblock.fs_sblkno + |
c5d3fd78 | 240 | roundup(howmany(sbsize, sblock.fs_fsize), sblock.fs_frag)); |
aca50d72 | 241 | sblock.fs_iblkno = sblock.fs_cblkno + sblock.fs_frag; |
bf541624 | 242 | sblock.fs_cgoffset = roundup( |
8485bb11 | 243 | howmany(sblock.fs_nsect, NSPF(&sblock)), sblock.fs_frag); |
bf541624 KM |
244 | for (sblock.fs_cgmask = 0xffffffff, i = sblock.fs_ntrak; i > 1; i >>= 1) |
245 | sblock.fs_cgmask <<= 1; | |
246 | if (!POWEROF2(sblock.fs_ntrak)) | |
247 | sblock.fs_cgmask <<= 1; | |
7292dd7c KM |
248 | /* |
249 | * Validate specified/determined secpercyl | |
250 | * and calculate minimum cylinders per group. | |
251 | */ | |
252 | sblock.fs_spc = secpercyl; | |
3aaf0f69 KM |
253 | for (sblock.fs_cpc = NSPB(&sblock), i = sblock.fs_spc; |
254 | sblock.fs_cpc > 1 && (i & 1) == 0; | |
255 | sblock.fs_cpc >>= 1, i >>= 1) | |
256 | /* void */; | |
7292dd7c | 257 | mincpc = sblock.fs_cpc; |
7292dd7c KM |
258 | bpcg = sblock.fs_spc * sectorsize; |
259 | inospercg = roundup(bpcg / sizeof(struct dinode), INOPB(&sblock)); | |
62f283da KM |
260 | if (inospercg > MAXIPG(&sblock)) |
261 | inospercg = MAXIPG(&sblock); | |
7292dd7c KM |
262 | used = (sblock.fs_iblkno + inospercg / INOPF(&sblock)) * NSPF(&sblock); |
263 | mincpgcnt = howmany(sblock.fs_cgoffset * (~sblock.fs_cgmask) + used, | |
264 | sblock.fs_spc); | |
265 | mincpg = roundup(mincpgcnt, mincpc); | |
266 | /* | |
267 | * Insure that cylinder group with mincpg has enough space | |
268 | * for block maps | |
269 | */ | |
62f283da KM |
270 | sblock.fs_cpg = mincpg; |
271 | sblock.fs_ipg = inospercg; | |
7292dd7c | 272 | mapcramped = 0; |
62f283da | 273 | while (CGSIZE(&sblock) > sblock.fs_bsize) { |
7292dd7c KM |
274 | mapcramped = 1; |
275 | if (sblock.fs_bsize < MAXBSIZE) { | |
276 | sblock.fs_bsize <<= 1; | |
277 | if ((i & 1) == 0) { | |
278 | i >>= 1; | |
279 | } else { | |
280 | sblock.fs_cpc <<= 1; | |
281 | mincpc <<= 1; | |
282 | mincpg = roundup(mincpgcnt, mincpc); | |
62f283da | 283 | sblock.fs_cpg = mincpg; |
7292dd7c KM |
284 | } |
285 | sblock.fs_frag <<= 1; | |
286 | sblock.fs_fragshift += 1; | |
287 | if (sblock.fs_frag <= MAXFRAG) | |
288 | continue; | |
289 | } | |
290 | if (sblock.fs_fsize == sblock.fs_bsize) { | |
291 | printf("There is no block size that"); | |
292 | printf(" can support this disk\n"); | |
1bcf18f3 | 293 | exit(22); |
7292dd7c KM |
294 | } |
295 | sblock.fs_frag >>= 1; | |
296 | sblock.fs_fragshift -= 1; | |
297 | sblock.fs_fsize <<= 1; | |
298 | sblock.fs_nspf <<= 1; | |
299 | } | |
300 | /* | |
301 | * Insure that cylinder group with mincpg has enough space for inodes | |
302 | */ | |
303 | inodecramped = 0; | |
304 | used *= sectorsize; | |
62f283da KM |
305 | inospercg = roundup((mincpg * bpcg - used) / density, INOPB(&sblock)); |
306 | sblock.fs_ipg = inospercg; | |
307 | while (inospercg > MAXIPG(&sblock)) { | |
7292dd7c KM |
308 | inodecramped = 1; |
309 | if (mincpc == 1 || sblock.fs_frag == 1 || | |
310 | sblock.fs_bsize == MINBSIZE) | |
311 | break; | |
312 | printf("With a block size of %d %s %d\n", sblock.fs_bsize, | |
313 | "minimum bytes per inode is", | |
62f283da | 314 | (mincpg * bpcg - used) / MAXIPG(&sblock) + 1); |
7292dd7c KM |
315 | sblock.fs_bsize >>= 1; |
316 | sblock.fs_frag >>= 1; | |
317 | sblock.fs_fragshift -= 1; | |
318 | mincpc >>= 1; | |
62f283da KM |
319 | sblock.fs_cpg = roundup(mincpgcnt, mincpc); |
320 | if (CGSIZE(&sblock) > sblock.fs_bsize) { | |
7292dd7c KM |
321 | sblock.fs_bsize <<= 1; |
322 | break; | |
323 | } | |
62f283da KM |
324 | mincpg = sblock.fs_cpg; |
325 | inospercg = | |
326 | roundup((mincpg * bpcg - used) / density, INOPB(&sblock)); | |
327 | sblock.fs_ipg = inospercg; | |
7292dd7c KM |
328 | } |
329 | if (inodecramped) { | |
62f283da | 330 | if (inospercg > MAXIPG(&sblock)) { |
7292dd7c | 331 | printf("Minimum bytes per inode is %d\n", |
62f283da | 332 | (mincpg * bpcg - used) / MAXIPG(&sblock) + 1); |
7292dd7c KM |
333 | } else if (!mapcramped) { |
334 | printf("With %d bytes per inode, ", density); | |
335 | printf("minimum cylinders per group is %d\n", mincpg); | |
336 | } | |
337 | } | |
338 | if (mapcramped) { | |
339 | printf("With %d sectors per cylinder, ", sblock.fs_spc); | |
340 | printf("minimum cylinders per group is %d\n", mincpg); | |
341 | } | |
342 | if (inodecramped || mapcramped) { | |
343 | if (sblock.fs_bsize != bsize) | |
344 | printf("%s to be changed from %d to %d\n", | |
345 | "This requires the block size", | |
346 | bsize, sblock.fs_bsize); | |
347 | if (sblock.fs_fsize != fsize) | |
348 | printf("\t%s to be changed from %d to %d\n", | |
349 | "and the fragment size", | |
62f283da | 350 | fsize, sblock.fs_fsize); |
1bcf18f3 | 351 | exit(23); |
173a62ff | 352 | } |
2fd3d252 | 353 | /* |
7292dd7c | 354 | * Calculate the number of cylinders per group |
d746d022 | 355 | */ |
8485bb11 | 356 | sblock.fs_cpg = cpg; |
7292dd7c | 357 | if (sblock.fs_cpg % mincpc != 0) { |
8485bb11 | 358 | printf("%s groups must have a multiple of %d cylinders\n", |
7292dd7c KM |
359 | cpgflg ? "Cylinder" : "Warning: cylinder", mincpc); |
360 | sblock.fs_cpg = roundup(sblock.fs_cpg, mincpc); | |
62f283da KM |
361 | if (!cpgflg) |
362 | cpg = sblock.fs_cpg; | |
8485bb11 | 363 | } |
7292dd7c | 364 | /* |
62f283da | 365 | * Must insure there is enough space for inodes |
7292dd7c | 366 | */ |
62f283da KM |
367 | sblock.fs_ipg = roundup((sblock.fs_cpg * bpcg - used) / density, |
368 | INOPB(&sblock)); | |
369 | while (sblock.fs_ipg > MAXIPG(&sblock)) { | |
370 | inodecramped = 1; | |
7292dd7c | 371 | sblock.fs_cpg -= mincpc; |
62f283da KM |
372 | sblock.fs_ipg = roundup((sblock.fs_cpg * bpcg - used) / density, |
373 | INOPB(&sblock)); | |
2fd3d252 | 374 | } |
7292dd7c | 375 | /* |
62f283da | 376 | * Must insure there is enough space to hold block map |
7292dd7c | 377 | */ |
62f283da KM |
378 | while (CGSIZE(&sblock) > sblock.fs_bsize) { |
379 | mapcramped = 1; | |
7292dd7c | 380 | sblock.fs_cpg -= mincpc; |
62f283da KM |
381 | sblock.fs_ipg = roundup((sblock.fs_cpg * bpcg - used) / density, |
382 | INOPB(&sblock)); | |
7292dd7c | 383 | } |
62f283da | 384 | sblock.fs_fpg = (sblock.fs_cpg * sblock.fs_spc) / NSPF(&sblock); |
7292dd7c | 385 | if ((sblock.fs_cpg * sblock.fs_spc) % NSPB(&sblock) != 0) { |
1bcf18f3 KM |
386 | printf("panic (fs_cpg * fs_spc) % NSPF != 0"); |
387 | exit(24); | |
7292dd7c KM |
388 | } |
389 | if (sblock.fs_cpg < mincpg) { | |
390 | printf("cylinder groups must have at least %d cylinders\n", | |
391 | mincpg); | |
1bcf18f3 | 392 | exit(25); |
7292dd7c KM |
393 | } else if (sblock.fs_cpg != cpg) { |
394 | if (!cpgflg) | |
395 | printf("Warning: "); | |
62f283da | 396 | else if (!mapcramped && !inodecramped) |
1bcf18f3 | 397 | exit(26); |
7292dd7c KM |
398 | if (mapcramped && inodecramped) |
399 | printf("Block size and bytes per inode restrict"); | |
400 | else if (mapcramped) | |
401 | printf("Block size restricts"); | |
402 | else | |
403 | printf("Bytes per inode restrict"); | |
404 | printf(" cylinders per group to %d.\n", sblock.fs_cpg); | |
405 | if (cpgflg) | |
1bcf18f3 | 406 | exit(27); |
3aaf0f69 | 407 | } |
62f283da | 408 | sblock.fs_cgsize = fragroundup(&sblock, CGSIZE(&sblock)); |
2fd3d252 KM |
409 | /* |
410 | * Now have size for file system and nsect and ntrak. | |
411 | * Determine number of cylinders and blocks in the file system. | |
412 | */ | |
413 | sblock.fs_size = fssize = dbtofsb(&sblock, fssize); | |
414 | sblock.fs_ncyl = fssize * NSPF(&sblock) / sblock.fs_spc; | |
aca50d72 | 415 | if (fssize * NSPF(&sblock) > sblock.fs_ncyl * sblock.fs_spc) { |
aca50d72 | 416 | sblock.fs_ncyl++; |
bf541624 | 417 | warn = 1; |
aca50d72 KM |
418 | } |
419 | if (sblock.fs_ncyl < 1) { | |
420 | printf("file systems must have at least one cylinder\n"); | |
1bcf18f3 | 421 | exit(28); |
2fd3d252 | 422 | } |
aca50d72 | 423 | /* |
62f283da KM |
424 | * Determine feasability/values of rotational layout tables. |
425 | * | |
426 | * The size of the rotational layout tables is limited by the | |
427 | * size of the superblock, SBSIZE. The amount of space available | |
428 | * for tables is calculated as (SBSIZE - sizeof (struct fs)). | |
429 | * The size of these tables is inversely proportional to the block | |
430 | * size of the file system. The size increases if sectors per track | |
431 | * are not powers of two, because more cylinders must be described | |
432 | * by the tables before the rotational pattern repeats (fs_cpc). | |
aca50d72 | 433 | */ |
7292dd7c KM |
434 | sblock.fs_interleave = interleave; |
435 | sblock.fs_trackskew = trackskew; | |
436 | sblock.fs_npsect = nphyssectors; | |
62f283da KM |
437 | sblock.fs_postblformat = FS_DYNAMICPOSTBLFMT; |
438 | sblock.fs_sbsize = fragroundup(&sblock, sizeof(struct fs)); | |
aca50d72 KM |
439 | if (sblock.fs_ntrak == 1) { |
440 | sblock.fs_cpc = 0; | |
441 | goto next; | |
442 | } | |
62f283da KM |
443 | postblsize = sblock.fs_nrpos * sblock.fs_cpc * sizeof(short); |
444 | rotblsize = sblock.fs_cpc * sblock.fs_spc / NSPB(&sblock); | |
445 | totalsbsize = sizeof(struct fs) + rotblsize; | |
446 | if (sblock.fs_nrpos == 8 && sblock.fs_cpc <= 16) { | |
447 | /* use old static table space */ | |
448 | sblock.fs_postbloff = (char *)(&sblock.fs_opostbl[0][0]) - | |
449 | (char *)(&sblock.fs_link); | |
450 | sblock.fs_rotbloff = &sblock.fs_space[0] - | |
451 | (u_char *)(&sblock.fs_link); | |
452 | } else { | |
453 | /* use dynamic table space */ | |
454 | sblock.fs_postbloff = &sblock.fs_space[0] - | |
455 | (u_char *)(&sblock.fs_link); | |
456 | sblock.fs_rotbloff = sblock.fs_postbloff + postblsize; | |
457 | totalsbsize += postblsize; | |
458 | } | |
459 | if (totalsbsize > SBSIZE || | |
aca50d72 KM |
460 | sblock.fs_nsect > (1 << NBBY) * NSPB(&sblock)) { |
461 | printf("%s %s %d %s %d.%s", | |
462 | "Warning: insufficient space in super block for\n", | |
463 | "rotational layout tables with nsect", sblock.fs_nsect, | |
464 | "and ntrak", sblock.fs_ntrak, | |
2373c2b8 | 465 | "\nFile system performance may be impared.\n"); |
aca50d72 KM |
466 | sblock.fs_cpc = 0; |
467 | goto next; | |
468 | } | |
62f283da | 469 | sblock.fs_sbsize = fragroundup(&sblock, totalsbsize); |
aca50d72 KM |
470 | /* |
471 | * calculate the available blocks for each rotational position | |
472 | */ | |
62f283da KM |
473 | for (cylno = 0; cylno < sblock.fs_cpc; cylno++) |
474 | for (rpos = 0; rpos < sblock.fs_nrpos; rpos++) | |
475 | fs_postbl(&sblock, cylno)[rpos] = -1; | |
476 | for (i = (rotblsize - 1) * sblock.fs_frag; | |
477 | i >= 0; i -= sblock.fs_frag) { | |
aca50d72 KM |
478 | cylno = cbtocylno(&sblock, i); |
479 | rpos = cbtorpos(&sblock, i); | |
62f283da KM |
480 | blk = fragstoblks(&sblock, i); |
481 | if (fs_postbl(&sblock, cylno)[rpos] == -1) | |
482 | fs_rotbl(&sblock)[blk] = 0; | |
aca50d72 | 483 | else |
62f283da KM |
484 | fs_rotbl(&sblock)[blk] = |
485 | fs_postbl(&sblock, cylno)[rpos] - blk; | |
486 | fs_postbl(&sblock, cylno)[rpos] = blk; | |
aca50d72 KM |
487 | } |
488 | next: | |
d746d022 KM |
489 | /* |
490 | * Compute/validate number of cylinder groups. | |
491 | */ | |
492 | sblock.fs_ncg = sblock.fs_ncyl / sblock.fs_cpg; | |
493 | if (sblock.fs_ncyl % sblock.fs_cpg) | |
494 | sblock.fs_ncg++; | |
aca50d72 | 495 | sblock.fs_dblkno = sblock.fs_iblkno + sblock.fs_ipg / INOPF(&sblock); |
bf541624 KM |
496 | i = MIN(~sblock.fs_cgmask, sblock.fs_ncg - 1); |
497 | if (cgdmin(&sblock, i) - cgbase(&sblock, i) >= sblock.fs_fpg) { | |
d746d022 | 498 | printf("inode blocks/cyl group (%d) >= data blocks (%d)\n", |
bf541624 | 499 | cgdmin(&sblock, i) - cgbase(&sblock, i) / sblock.fs_frag, |
b6407c9d | 500 | sblock.fs_fpg / sblock.fs_frag); |
7292dd7c | 501 | printf("number of cylinders per cylinder group (%d) %s.\n", |
62f283da | 502 | sblock.fs_cpg, "must be increased"); |
1bcf18f3 | 503 | exit(29); |
b6407c9d | 504 | } |
bf541624 KM |
505 | j = sblock.fs_ncg - 1; |
506 | if ((i = fssize - j * sblock.fs_fpg) < sblock.fs_fpg && | |
507 | cgdmin(&sblock, j) - cgbase(&sblock, j) > i) { | |
1bcf18f3 KM |
508 | if (j == 0) { |
509 | printf("Filesystem must have at least %d sectors\n", | |
510 | NSPF(&sblock) * | |
511 | (cgdmin(&sblock, 0) + 3 * sblock.fs_frag)); | |
512 | exit(30); | |
513 | } | |
bf541624 KM |
514 | printf("Warning: inode blocks/cyl group (%d) >= data blocks (%d) in last\n", |
515 | (cgdmin(&sblock, j) - cgbase(&sblock, j)) / sblock.fs_frag, | |
516 | i / sblock.fs_frag); | |
517 | printf(" cylinder group. This implies %d sector(s) cannot be allocated.\n", | |
518 | i * NSPF(&sblock)); | |
519 | sblock.fs_ncg--; | |
520 | sblock.fs_ncyl -= sblock.fs_ncyl % sblock.fs_cpg; | |
521 | sblock.fs_size = fssize = sblock.fs_ncyl * sblock.fs_spc / | |
522 | NSPF(&sblock); | |
523 | warn = 0; | |
524 | } | |
822f4068 | 525 | if (warn && !mfs) { |
bf541624 KM |
526 | printf("Warning: %d sector(s) in last cylinder unallocated\n", |
527 | sblock.fs_spc - | |
528 | (fssize * NSPF(&sblock) - (sblock.fs_ncyl - 1) | |
529 | * sblock.fs_spc)); | |
530 | } | |
2fd3d252 KM |
531 | /* |
532 | * fill in remaining fields of the super block | |
533 | */ | |
6994bf5d | 534 | sblock.fs_csaddr = cgdmin(&sblock, 0); |
bf541624 KM |
535 | sblock.fs_cssize = |
536 | fragroundup(&sblock, sblock.fs_ncg * sizeof(struct csum)); | |
19782540 KM |
537 | i = sblock.fs_bsize / sizeof(struct csum); |
538 | sblock.fs_csmask = ~(i - 1); | |
539 | for (sblock.fs_csshift = 0; i > 1; i >>= 1) | |
540 | sblock.fs_csshift++; | |
bf541624 | 541 | fscs = (struct csum *)calloc(1, sblock.fs_cssize); |
aca50d72 | 542 | sblock.fs_magic = FS_MAGIC; |
8485bb11 KM |
543 | sblock.fs_rotdelay = rotdelay; |
544 | sblock.fs_minfree = minfree; | |
545 | sblock.fs_maxcontig = maxcontig; | |
a20edd44 KM |
546 | sblock.fs_headswitch = headswitch; |
547 | sblock.fs_trkseek = trackseek; | |
3d632f12 | 548 | sblock.fs_maxbpg = maxbpg; |
8485bb11 KM |
549 | sblock.fs_rps = rpm / 60; |
550 | sblock.fs_optim = opt; | |
2fd3d252 KM |
551 | sblock.fs_cgrotor = 0; |
552 | sblock.fs_cstotal.cs_ndir = 0; | |
553 | sblock.fs_cstotal.cs_nbfree = 0; | |
554 | sblock.fs_cstotal.cs_nifree = 0; | |
555 | sblock.fs_cstotal.cs_nffree = 0; | |
d746d022 KM |
556 | sblock.fs_fmod = 0; |
557 | sblock.fs_ronly = 0; | |
d746d022 | 558 | /* |
2fd3d252 | 559 | * Dump out summary information about file system. |
d746d022 | 560 | */ |
822f4068 | 561 | if (!mfs) { |
1bcf18f3 KM |
562 | printf("%s:\t%d sectors in %d %s of %d tracks, %d sectors\n", |
563 | fsys, sblock.fs_size * NSPF(&sblock), sblock.fs_ncyl, | |
564 | "cylinders", sblock.fs_ntrak, sblock.fs_nsect); | |
565 | printf("\t%.1fMB in %d cyl groups (%d c/g, %.2fMB/g, %d i/g)\n", | |
566 | (float)sblock.fs_size * sblock.fs_fsize * 1e-6, | |
567 | sblock.fs_ncg, sblock.fs_cpg, | |
568 | (float)sblock.fs_fpg * sblock.fs_fsize * 1e-6, | |
569 | sblock.fs_ipg); | |
570 | } | |
d746d022 KM |
571 | /* |
572 | * Now build the cylinders group blocks and | |
2fd3d252 | 573 | * then print out indices of cylinder groups. |
d746d022 | 574 | */ |
822f4068 | 575 | if (!mfs) |
1bcf18f3 | 576 | printf("super-block backups (for fsck -b #) at:"); |
bf541624 | 577 | for (cylno = 0; cylno < sblock.fs_ncg; cylno++) { |
aca50d72 | 578 | initcg(cylno); |
822f4068 | 579 | if (mfs) |
1bcf18f3 | 580 | continue; |
7292dd7c | 581 | if (cylno % 9 == 0) |
bf541624 KM |
582 | printf("\n"); |
583 | printf(" %d,", fsbtodb(&sblock, cgsblock(&sblock, cylno))); | |
584 | } | |
822f4068 | 585 | if (!mfs) |
1bcf18f3 | 586 | printf("\n"); |
822f4068 | 587 | if (Nflag && !mfs) |
56a085eb | 588 | exit(0); |
d746d022 | 589 | /* |
2fd3d252 | 590 | * Now construct the initial file system, |
d746d022 KM |
591 | * then write out the super-block. |
592 | */ | |
2fd3d252 | 593 | fsinit(); |
d746d022 | 594 | sblock.fs_time = utime; |
c5d3fd78 | 595 | wtfs(SBOFF / sectorsize, sbsize, (char *)&sblock); |
b6407c9d | 596 | for (i = 0; i < sblock.fs_cssize; i += sblock.fs_bsize) |
3352e84a | 597 | wtfs(fsbtodb(&sblock, sblock.fs_csaddr + numfrags(&sblock, i)), |
bf541624 KM |
598 | sblock.fs_cssize - i < sblock.fs_bsize ? |
599 | sblock.fs_cssize - i : sblock.fs_bsize, | |
600 | ((char *)fscs) + i); | |
2fd3d252 KM |
601 | /* |
602 | * Write out the duplicate super blocks | |
603 | */ | |
c2b9e883 | 604 | for (cylno = 0; cylno < sblock.fs_ncg; cylno++) |
bf541624 | 605 | wtfs(fsbtodb(&sblock, cgsblock(&sblock, cylno)), |
c5d3fd78 | 606 | sbsize, (char *)&sblock); |
8485bb11 KM |
607 | /* |
608 | * Update information about this partion in pack | |
609 | * label, to that it may be updated on disk. | |
610 | */ | |
611 | pp->p_fstype = FS_BSDFFS; | |
612 | pp->p_fsize = sblock.fs_fsize; | |
613 | pp->p_frag = sblock.fs_frag; | |
614 | pp->p_cpg = sblock.fs_cpg; | |
1bcf18f3 KM |
615 | /* |
616 | * Notify parent process of success. | |
617 | */ | |
822f4068 | 618 | if (mfs) |
1bcf18f3 | 619 | kill(ppid, SIGUSR1); |
d746d022 KM |
620 | } |
621 | ||
622 | /* | |
623 | * Initialize a cylinder group. | |
624 | */ | |
aca50d72 KM |
625 | initcg(cylno) |
626 | int cylno; | |
d746d022 | 627 | { |
bf541624 | 628 | daddr_t cbase, d, dlower, dupper, dmax; |
d746d022 KM |
629 | long i, j, s; |
630 | register struct csum *cs; | |
631 | ||
632 | /* | |
633 | * Determine block bounds for cylinder group. | |
634 | * Allow space for super block summary information in first | |
635 | * cylinder group. | |
636 | */ | |
6994bf5d | 637 | cbase = cgbase(&sblock, cylno); |
d746d022 KM |
638 | dmax = cbase + sblock.fs_fpg; |
639 | if (dmax > sblock.fs_size) | |
640 | dmax = sblock.fs_size; | |
bf541624 KM |
641 | dlower = cgsblock(&sblock, cylno) - cbase; |
642 | dupper = cgdmin(&sblock, cylno) - cbase; | |
62f283da KM |
643 | if (cylno == 0) |
644 | dupper += howmany(sblock.fs_cssize, sblock.fs_fsize); | |
aca50d72 | 645 | cs = fscs + cylno; |
d746d022 KM |
646 | acg.cg_time = utime; |
647 | acg.cg_magic = CG_MAGIC; | |
aca50d72 | 648 | acg.cg_cgx = cylno; |
bb40745e KM |
649 | if (cylno == sblock.fs_ncg - 1) |
650 | acg.cg_ncyl = sblock.fs_ncyl % sblock.fs_cpg; | |
651 | else | |
652 | acg.cg_ncyl = sblock.fs_cpg; | |
d746d022 KM |
653 | acg.cg_niblk = sblock.fs_ipg; |
654 | acg.cg_ndblk = dmax - cbase; | |
0947395d KM |
655 | acg.cg_cs.cs_ndir = 0; |
656 | acg.cg_cs.cs_nffree = 0; | |
657 | acg.cg_cs.cs_nbfree = 0; | |
658 | acg.cg_cs.cs_nifree = 0; | |
bf541624 KM |
659 | acg.cg_rotor = 0; |
660 | acg.cg_frotor = 0; | |
92ea6158 | 661 | acg.cg_irotor = 0; |
62f283da KM |
662 | acg.cg_btotoff = &acg.cg_space[0] - (u_char *)(&acg.cg_link); |
663 | acg.cg_boff = acg.cg_btotoff + sblock.fs_cpg * sizeof(long); | |
664 | acg.cg_iusedoff = acg.cg_boff + | |
665 | sblock.fs_cpg * sblock.fs_nrpos * sizeof(short); | |
666 | acg.cg_freeoff = acg.cg_iusedoff + howmany(sblock.fs_ipg, NBBY); | |
667 | acg.cg_nextfreeoff = acg.cg_freeoff + | |
668 | howmany(sblock.fs_cpg * sblock.fs_spc / NSPF(&sblock), NBBY); | |
b6407c9d | 669 | for (i = 0; i < sblock.fs_frag; i++) { |
f3c028b7 KM |
670 | acg.cg_frsum[i] = 0; |
671 | } | |
62f283da KM |
672 | bzero((caddr_t)cg_inosused(&acg), acg.cg_freeoff - acg.cg_iusedoff); |
673 | acg.cg_cs.cs_nifree += sblock.fs_ipg; | |
aca50d72 | 674 | if (cylno == 0) |
2fd3d252 | 675 | for (i = 0; i < ROOTINO; i++) { |
62f283da | 676 | setbit(cg_inosused(&acg), i); |
2fd3d252 KM |
677 | acg.cg_cs.cs_nifree--; |
678 | } | |
62f283da KM |
679 | for (i = 0; i < sblock.fs_ipg / INOPF(&sblock); i += sblock.fs_frag) |
680 | wtfs(fsbtodb(&sblock, cgimin(&sblock, cylno) + i), | |
681 | sblock.fs_bsize, (char *)zino); | |
682 | bzero((caddr_t)cg_blktot(&acg), acg.cg_boff - acg.cg_btotoff); | |
683 | bzero((caddr_t)cg_blks(&sblock, &acg, 0), | |
684 | acg.cg_iusedoff - acg.cg_boff); | |
685 | bzero((caddr_t)cg_blksfree(&acg), acg.cg_nextfreeoff - acg.cg_freeoff); | |
686 | if (cylno > 0) { | |
bf541624 | 687 | /* |
62f283da KM |
688 | * In cylno 0, beginning space is reserved |
689 | * for boot and super blocks. | |
bf541624 | 690 | */ |
bf541624 | 691 | for (d = 0; d < dlower; d += sblock.fs_frag) { |
62f283da | 692 | setblock(&sblock, cg_blksfree(&acg), d/sblock.fs_frag); |
bf541624 | 693 | acg.cg_cs.cs_nbfree++; |
62f283da KM |
694 | cg_blktot(&acg)[cbtocylno(&sblock, d)]++; |
695 | cg_blks(&sblock, &acg, cbtocylno(&sblock, d)) | |
696 | [cbtorpos(&sblock, d)]++; | |
bf541624 KM |
697 | } |
698 | sblock.fs_dsize += dlower; | |
d746d022 | 699 | } |
bf541624 | 700 | sblock.fs_dsize += acg.cg_ndblk - dupper; |
62f283da KM |
701 | if (i = dupper % sblock.fs_frag) { |
702 | acg.cg_frsum[sblock.fs_frag - i]++; | |
703 | for (d = dupper + sblock.fs_frag - i; dupper < d; dupper++) { | |
704 | setbit(cg_blksfree(&acg), dupper); | |
bf541624 KM |
705 | acg.cg_cs.cs_nffree++; |
706 | } | |
707 | } | |
62f283da KM |
708 | for (d = dupper; d + sblock.fs_frag <= dmax - cbase; ) { |
709 | setblock(&sblock, cg_blksfree(&acg), d / sblock.fs_frag); | |
0947395d | 710 | acg.cg_cs.cs_nbfree++; |
62f283da KM |
711 | cg_blktot(&acg)[cbtocylno(&sblock, d)]++; |
712 | cg_blks(&sblock, &acg, cbtocylno(&sblock, d)) | |
713 | [cbtorpos(&sblock, d)]++; | |
b6407c9d | 714 | d += sblock.fs_frag; |
d746d022 | 715 | } |
bf541624 | 716 | if (d < dmax - cbase) { |
aca50d72 | 717 | acg.cg_frsum[dmax - cbase - d]++; |
56d45dcd | 718 | for (; d < dmax - cbase; d++) { |
62f283da | 719 | setbit(cg_blksfree(&acg), d); |
0947395d | 720 | acg.cg_cs.cs_nffree++; |
56d45dcd | 721 | } |
bf541624 | 722 | } |
0947395d KM |
723 | sblock.fs_cstotal.cs_ndir += acg.cg_cs.cs_ndir; |
724 | sblock.fs_cstotal.cs_nffree += acg.cg_cs.cs_nffree; | |
725 | sblock.fs_cstotal.cs_nbfree += acg.cg_cs.cs_nbfree; | |
726 | sblock.fs_cstotal.cs_nifree += acg.cg_cs.cs_nifree; | |
727 | *cs = acg.cg_cs; | |
6994bf5d | 728 | wtfs(fsbtodb(&sblock, cgtod(&sblock, cylno)), |
b6407c9d | 729 | sblock.fs_bsize, (char *)&acg); |
d746d022 KM |
730 | } |
731 | ||
2fd3d252 KM |
732 | /* |
733 | * initialize the file system | |
734 | */ | |
73acce1d | 735 | struct dinode node; |
8485bb11 KM |
736 | |
737 | #ifdef LOSTDIR | |
2fd3d252 | 738 | #define PREDEFDIR 3 |
8485bb11 KM |
739 | #else |
740 | #define PREDEFDIR 2 | |
741 | #endif | |
742 | ||
052efd62 KM |
743 | struct direct root_dir[] = { |
744 | { ROOTINO, sizeof(struct direct), 1, "." }, | |
745 | { ROOTINO, sizeof(struct direct), 2, ".." }, | |
8485bb11 | 746 | #ifdef LOSTDIR |
052efd62 | 747 | { LOSTFOUNDINO, sizeof(struct direct), 10, "lost+found" }, |
8485bb11 | 748 | #endif |
2fd3d252 | 749 | }; |
8485bb11 | 750 | #ifdef LOSTDIR |
052efd62 KM |
751 | struct direct lost_found_dir[] = { |
752 | { LOSTFOUNDINO, sizeof(struct direct), 1, "." }, | |
753 | { ROOTINO, sizeof(struct direct), 2, ".." }, | |
754 | { 0, DIRBLKSIZ, 0, 0 }, | |
2fd3d252 | 755 | }; |
8485bb11 | 756 | #endif |
052efd62 | 757 | char buf[MAXBSIZE]; |
2fd3d252 KM |
758 | |
759 | fsinit() | |
d746d022 | 760 | { |
052efd62 KM |
761 | int i; |
762 | ||
d746d022 | 763 | /* |
2fd3d252 | 764 | * initialize the node |
d746d022 | 765 | */ |
73acce1d KM |
766 | node.di_atime = utime; |
767 | node.di_mtime = utime; | |
768 | node.di_ctime = utime; | |
8485bb11 | 769 | #ifdef LOSTDIR |
d746d022 | 770 | /* |
2fd3d252 | 771 | * create the lost+found directory |
d746d022 | 772 | */ |
052efd62 KM |
773 | (void)makedir(lost_found_dir, 2); |
774 | for (i = DIRBLKSIZ; i < sblock.fs_bsize; i += DIRBLKSIZ) | |
775 | bcopy(&lost_found_dir[2], &buf[i], DIRSIZ(&lost_found_dir[2])); | |
73acce1d KM |
776 | node.di_mode = IFDIR | UMASK; |
777 | node.di_nlink = 2; | |
778 | node.di_size = sblock.fs_bsize; | |
779 | node.di_db[0] = alloc(node.di_size, node.di_mode); | |
780 | node.di_blocks = btodb(fragroundup(&sblock, node.di_size)); | |
781 | wtfs(fsbtodb(&sblock, node.di_db[0]), node.di_size, buf); | |
782 | iput(&node, LOSTFOUNDINO); | |
8485bb11 | 783 | #endif |
2fd3d252 KM |
784 | /* |
785 | * create the root directory | |
786 | */ | |
822f4068 | 787 | if (mfs) |
73acce1d | 788 | node.di_mode = IFDIR | 01777; |
1bcf18f3 | 789 | else |
73acce1d KM |
790 | node.di_mode = IFDIR | UMASK; |
791 | node.di_nlink = PREDEFDIR; | |
792 | node.di_size = makedir(root_dir, PREDEFDIR); | |
793 | node.di_db[0] = alloc(sblock.fs_fsize, node.di_mode); | |
794 | node.di_blocks = btodb(fragroundup(&sblock, node.di_size)); | |
795 | wtfs(fsbtodb(&sblock, node.di_db[0]), sblock.fs_fsize, buf); | |
796 | iput(&node, ROOTINO); | |
d746d022 KM |
797 | } |
798 | ||
052efd62 KM |
799 | /* |
800 | * construct a set of directory entries in "buf". | |
801 | * return size of directory. | |
802 | */ | |
803 | makedir(protodir, entries) | |
804 | register struct direct *protodir; | |
805 | int entries; | |
806 | { | |
807 | char *cp; | |
808 | int i, spcleft; | |
809 | ||
810 | spcleft = DIRBLKSIZ; | |
811 | for (cp = buf, i = 0; i < entries - 1; i++) { | |
812 | protodir[i].d_reclen = DIRSIZ(&protodir[i]); | |
813 | bcopy(&protodir[i], cp, protodir[i].d_reclen); | |
814 | cp += protodir[i].d_reclen; | |
815 | spcleft -= protodir[i].d_reclen; | |
816 | } | |
817 | protodir[i].d_reclen = spcleft; | |
818 | bcopy(&protodir[i], cp, DIRSIZ(&protodir[i])); | |
4b47cead | 819 | return (DIRBLKSIZ); |
052efd62 KM |
820 | } |
821 | ||
2fd3d252 KM |
822 | /* |
823 | * allocate a block or frag | |
824 | */ | |
d746d022 | 825 | daddr_t |
07670f7d KM |
826 | alloc(size, mode) |
827 | int size; | |
828 | int mode; | |
d746d022 | 829 | { |
aca50d72 | 830 | int i, frag; |
d746d022 KM |
831 | daddr_t d; |
832 | ||
3352e84a KM |
833 | rdfs(fsbtodb(&sblock, cgtod(&sblock, 0)), sblock.fs_cgsize, |
834 | (char *)&acg); | |
bf541624 KM |
835 | if (acg.cg_magic != CG_MAGIC) { |
836 | printf("cg 0: bad magic number\n"); | |
837 | return (0); | |
838 | } | |
0947395d | 839 | if (acg.cg_cs.cs_nbfree == 0) { |
d746d022 KM |
840 | printf("first cylinder group ran out of space\n"); |
841 | return (0); | |
842 | } | |
b6407c9d | 843 | for (d = 0; d < acg.cg_ndblk; d += sblock.fs_frag) |
62f283da | 844 | if (isblock(&sblock, cg_blksfree(&acg), d / sblock.fs_frag)) |
d746d022 KM |
845 | goto goth; |
846 | printf("internal error: can't find block in cyl 0\n"); | |
847 | return (0); | |
848 | goth: | |
62f283da | 849 | clrblock(&sblock, cg_blksfree(&acg), d / sblock.fs_frag); |
0947395d KM |
850 | acg.cg_cs.cs_nbfree--; |
851 | sblock.fs_cstotal.cs_nbfree--; | |
d746d022 | 852 | fscs[0].cs_nbfree--; |
07670f7d | 853 | if (mode & IFDIR) { |
0947395d KM |
854 | acg.cg_cs.cs_ndir++; |
855 | sblock.fs_cstotal.cs_ndir++; | |
07670f7d KM |
856 | fscs[0].cs_ndir++; |
857 | } | |
62f283da KM |
858 | cg_blktot(&acg)[cbtocylno(&sblock, d)]--; |
859 | cg_blks(&sblock, &acg, cbtocylno(&sblock, d))[cbtorpos(&sblock, d)]--; | |
b6407c9d KM |
860 | if (size != sblock.fs_bsize) { |
861 | frag = howmany(size, sblock.fs_fsize); | |
862 | fscs[0].cs_nffree += sblock.fs_frag - frag; | |
863 | sblock.fs_cstotal.cs_nffree += sblock.fs_frag - frag; | |
864 | acg.cg_cs.cs_nffree += sblock.fs_frag - frag; | |
865 | acg.cg_frsum[sblock.fs_frag - frag]++; | |
866 | for (i = frag; i < sblock.fs_frag; i++) | |
62f283da | 867 | setbit(cg_blksfree(&acg), d + i); |
d746d022 | 868 | } |
3352e84a KM |
869 | wtfs(fsbtodb(&sblock, cgtod(&sblock, 0)), sblock.fs_cgsize, |
870 | (char *)&acg); | |
d746d022 KM |
871 | return (d); |
872 | } | |
873 | ||
2fd3d252 KM |
874 | /* |
875 | * Allocate an inode on the disk | |
876 | */ | |
73acce1d KM |
877 | iput(ip, ino) |
878 | register struct dinode *ip; | |
879 | register ino_t ino; | |
d746d022 | 880 | { |
2fd3d252 | 881 | struct dinode buf[MAXINOPB]; |
d746d022 | 882 | daddr_t d; |
2fd3d252 | 883 | int c; |
d746d022 | 884 | |
73acce1d | 885 | c = itog(&sblock, ino); |
3352e84a KM |
886 | rdfs(fsbtodb(&sblock, cgtod(&sblock, 0)), sblock.fs_cgsize, |
887 | (char *)&acg); | |
bf541624 KM |
888 | if (acg.cg_magic != CG_MAGIC) { |
889 | printf("cg 0: bad magic number\n"); | |
1bcf18f3 | 890 | exit(31); |
bf541624 | 891 | } |
0947395d | 892 | acg.cg_cs.cs_nifree--; |
73acce1d | 893 | setbit(cg_inosused(&acg), ino); |
3352e84a KM |
894 | wtfs(fsbtodb(&sblock, cgtod(&sblock, 0)), sblock.fs_cgsize, |
895 | (char *)&acg); | |
0947395d | 896 | sblock.fs_cstotal.cs_nifree--; |
d746d022 | 897 | fscs[0].cs_nifree--; |
73acce1d KM |
898 | if (ino >= sblock.fs_ipg * sblock.fs_ncg) { |
899 | printf("fsinit: inode value out of range (%d).\n", ino); | |
1bcf18f3 | 900 | exit(32); |
d746d022 | 901 | } |
73acce1d | 902 | d = fsbtodb(&sblock, itod(&sblock, ino)); |
2fd3d252 | 903 | rdfs(d, sblock.fs_bsize, buf); |
73acce1d | 904 | buf[itoo(&sblock, ino)] = *ip; |
2fd3d252 KM |
905 | wtfs(d, sblock.fs_bsize, buf); |
906 | } | |
907 | ||
1bcf18f3 KM |
908 | /* |
909 | * Notify parent process that the filesystem has created itself successfully. | |
910 | */ | |
911 | started() | |
912 | { | |
913 | ||
914 | exit(0); | |
915 | } | |
916 | ||
917 | /* | |
918 | * Replace libc function with one suited to our needs. | |
919 | */ | |
920 | caddr_t | |
921 | malloc(size) | |
922 | register u_long size; | |
923 | { | |
924 | u_long base, i; | |
925 | static u_long pgsz; | |
926 | struct rlimit rlp; | |
927 | ||
928 | if (pgsz == 0) { | |
929 | base = sbrk(0); | |
930 | pgsz = getpagesize() - 1; | |
931 | i = (base + pgsz) &~ pgsz; | |
932 | base = sbrk(i - base); | |
933 | if (getrlimit(RLIMIT_DATA, &rlp) < 0) | |
934 | perror("getrlimit"); | |
935 | rlp.rlim_cur = rlp.rlim_max; | |
936 | if (setrlimit(RLIMIT_DATA, &rlp) < 0) | |
937 | perror("setrlimit"); | |
938 | memleft = rlp.rlim_max - base; | |
939 | } | |
940 | size = (size + pgsz) &~ pgsz; | |
941 | if (size > memleft) | |
942 | size = memleft; | |
943 | memleft -= size; | |
944 | if (size == 0) | |
945 | return (0); | |
946 | return ((caddr_t)sbrk(size)); | |
947 | } | |
948 | ||
949 | /* | |
950 | * Replace libc function with one suited to our needs. | |
951 | */ | |
952 | caddr_t | |
953 | realloc(ptr, size) | |
954 | char *ptr; | |
955 | u_long size; | |
956 | { | |
957 | ||
958 | /* always fail for now */ | |
959 | return ((caddr_t)0); | |
960 | } | |
961 | ||
962 | /* | |
963 | * Replace libc function with one suited to our needs. | |
964 | */ | |
965 | char * | |
966 | calloc(size, numelm) | |
967 | u_long size, numelm; | |
968 | { | |
969 | caddr_t base; | |
970 | ||
971 | size *= numelm; | |
972 | base = malloc(size); | |
973 | bzero(base, size); | |
974 | return (base); | |
975 | } | |
976 | ||
977 | /* | |
978 | * Replace libc function with one suited to our needs. | |
979 | */ | |
980 | free(ptr) | |
981 | char *ptr; | |
982 | { | |
983 | ||
984 | /* do not worry about it for now */ | |
985 | } | |
986 | ||
2fd3d252 KM |
987 | /* |
988 | * read a block from the file system | |
989 | */ | |
990 | rdfs(bno, size, bf) | |
991 | daddr_t bno; | |
992 | int size; | |
993 | char *bf; | |
994 | { | |
995 | int n; | |
996 | ||
822f4068 | 997 | if (mfs) { |
1bcf18f3 KM |
998 | bcopy(membase + bno * sectorsize, bf, size); |
999 | return; | |
1000 | } | |
8485bb11 | 1001 | if (lseek(fsi, bno * sectorsize, 0) < 0) { |
c312eebd KM |
1002 | printf("seek error: %ld\n", bno); |
1003 | perror("rdfs"); | |
1bcf18f3 | 1004 | exit(33); |
c312eebd | 1005 | } |
2fd3d252 KM |
1006 | n = read(fsi, bf, size); |
1007 | if(n != size) { | |
1008 | printf("read error: %ld\n", bno); | |
c312eebd | 1009 | perror("rdfs"); |
1bcf18f3 | 1010 | exit(34); |
b6407c9d | 1011 | } |
b6407c9d KM |
1012 | } |
1013 | ||
1014 | /* | |
2fd3d252 | 1015 | * write a block to the file system |
b6407c9d | 1016 | */ |
2fd3d252 KM |
1017 | wtfs(bno, size, bf) |
1018 | daddr_t bno; | |
1019 | int size; | |
1020 | char *bf; | |
1021 | { | |
1022 | int n; | |
1023 | ||
822f4068 | 1024 | if (mfs) { |
1bcf18f3 KM |
1025 | bcopy(bf, membase + bno * sectorsize, size); |
1026 | return; | |
1027 | } | |
56a085eb KM |
1028 | if (Nflag) |
1029 | return; | |
8485bb11 | 1030 | if (lseek(fso, bno * sectorsize, 0) < 0) { |
c312eebd KM |
1031 | printf("seek error: %ld\n", bno); |
1032 | perror("wtfs"); | |
1bcf18f3 | 1033 | exit(35); |
c312eebd | 1034 | } |
2fd3d252 KM |
1035 | n = write(fso, bf, size); |
1036 | if(n != size) { | |
5997b76f | 1037 | printf("write error: %ld\n", bno); |
c312eebd | 1038 | perror("wtfs"); |
1bcf18f3 | 1039 | exit(36); |
2fd3d252 KM |
1040 | } |
1041 | } | |
b6407c9d | 1042 | |
2fd3d252 KM |
1043 | /* |
1044 | * check if a block is available | |
1045 | */ | |
b6407c9d KM |
1046 | isblock(fs, cp, h) |
1047 | struct fs *fs; | |
1048 | unsigned char *cp; | |
1049 | int h; | |
1050 | { | |
1051 | unsigned char mask; | |
1052 | ||
1053 | switch (fs->fs_frag) { | |
1054 | case 8: | |
1055 | return (cp[h] == 0xff); | |
1056 | case 4: | |
1057 | mask = 0x0f << ((h & 0x1) << 2); | |
1058 | return ((cp[h >> 1] & mask) == mask); | |
1059 | case 2: | |
1060 | mask = 0x03 << ((h & 0x3) << 1); | |
1061 | return ((cp[h >> 2] & mask) == mask); | |
1062 | case 1: | |
1063 | mask = 0x01 << (h & 0x7); | |
1064 | return ((cp[h >> 3] & mask) == mask); | |
1065 | default: | |
4384e5a5 KM |
1066 | #ifdef STANDALONE |
1067 | printf("isblock bad fs_frag %d\n", fs->fs_frag); | |
1068 | #else | |
b6407c9d | 1069 | fprintf(stderr, "isblock bad fs_frag %d\n", fs->fs_frag); |
4384e5a5 | 1070 | #endif |
edc611b2 | 1071 | return (0); |
b6407c9d KM |
1072 | } |
1073 | } | |
1074 | ||
2fd3d252 KM |
1075 | /* |
1076 | * take a block out of the map | |
1077 | */ | |
b6407c9d KM |
1078 | clrblock(fs, cp, h) |
1079 | struct fs *fs; | |
1080 | unsigned char *cp; | |
1081 | int h; | |
1082 | { | |
1083 | switch ((fs)->fs_frag) { | |
1084 | case 8: | |
1085 | cp[h] = 0; | |
1086 | return; | |
1087 | case 4: | |
1088 | cp[h >> 1] &= ~(0x0f << ((h & 0x1) << 2)); | |
1089 | return; | |
1090 | case 2: | |
1091 | cp[h >> 2] &= ~(0x03 << ((h & 0x3) << 1)); | |
1092 | return; | |
1093 | case 1: | |
1094 | cp[h >> 3] &= ~(0x01 << (h & 0x7)); | |
1095 | return; | |
1096 | default: | |
4384e5a5 KM |
1097 | #ifdef STANDALONE |
1098 | printf("clrblock bad fs_frag %d\n", fs->fs_frag); | |
1099 | #else | |
b6407c9d | 1100 | fprintf(stderr, "clrblock bad fs_frag %d\n", fs->fs_frag); |
4384e5a5 | 1101 | #endif |
b6407c9d KM |
1102 | return; |
1103 | } | |
1104 | } | |
1105 | ||
2fd3d252 KM |
1106 | /* |
1107 | * put a block into the map | |
1108 | */ | |
b6407c9d KM |
1109 | setblock(fs, cp, h) |
1110 | struct fs *fs; | |
1111 | unsigned char *cp; | |
1112 | int h; | |
1113 | { | |
1114 | switch (fs->fs_frag) { | |
1115 | case 8: | |
1116 | cp[h] = 0xff; | |
1117 | return; | |
1118 | case 4: | |
1119 | cp[h >> 1] |= (0x0f << ((h & 0x1) << 2)); | |
1120 | return; | |
1121 | case 2: | |
1122 | cp[h >> 2] |= (0x03 << ((h & 0x3) << 1)); | |
1123 | return; | |
1124 | case 1: | |
1125 | cp[h >> 3] |= (0x01 << (h & 0x7)); | |
1126 | return; | |
1127 | default: | |
4384e5a5 KM |
1128 | #ifdef STANDALONE |
1129 | printf("setblock bad fs_frag %d\n", fs->fs_frag); | |
1130 | #else | |
b6407c9d | 1131 | fprintf(stderr, "setblock bad fs_frag %d\n", fs->fs_frag); |
4384e5a5 | 1132 | #endif |
b6407c9d | 1133 | return; |
d746d022 | 1134 | } |
d746d022 | 1135 | } |