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 | |
1bcf18f3 KM |
19 | static char sccsid[] = "@(#)mkfs.c 6.11 (Berkeley) %G%"; |
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> | |
e6c352bc KM |
31 | #include <sys/vnode.h> |
32 | #include <ufs/inode.h> | |
33 | #include <ufs/fs.h> | |
34 | #include <ufs/dir.h> | |
8485bb11 | 35 | #include <sys/disklabel.h> |
62f283da KM |
36 | #include <machine/endian.h> |
37 | ||
38 | /* | |
39 | * make file system for cylinder-group style file systems | |
40 | */ | |
41 | ||
42 | /* | |
43 | * The size of a cylinder group is calculated by CGSIZE. The maximum size | |
44 | * is limited by the fact that cylinder groups are at most one block. | |
45 | * Its size is derived from the size of the maps maintained in the | |
46 | * cylinder group and the (struct cg) size. | |
47 | */ | |
48 | #define CGSIZE(fs) \ | |
49 | /* base cg */ (sizeof(struct cg) + \ | |
50 | /* blktot size */ (fs)->fs_cpg * sizeof(long) + \ | |
51 | /* blks size */ (fs)->fs_cpg * (fs)->fs_nrpos * sizeof(short) + \ | |
52 | /* inode map */ howmany((fs)->fs_ipg, NBBY) + \ | |
53 | /* block map */ howmany((fs)->fs_cpg * (fs)->fs_spc / NSPF(fs), NBBY)) | |
54 | ||
55 | /* | |
56 | * We limit the size of the inode map to be no more than a | |
57 | * third of the cylinder group space, since we must leave at | |
58 | * least an equal amount of space for the block map. | |
59 | * | |
60 | * N.B.: MAXIPG must be a multiple of INOPB(fs). | |
61 | */ | |
62 | #define MAXIPG(fs) roundup((fs)->fs_bsize * NBBY / 3, INOPB(fs)) | |
8485bb11 | 63 | |
2fd3d252 | 64 | #define UMASK 0755 |
c312eebd | 65 | #define MAXINOPB (MAXBSIZE / sizeof(struct dinode)) |
2fd3d252 | 66 | #define POWEROF2(num) (((num) & ((num) - 1)) == 0) |
d746d022 | 67 | |
8485bb11 KM |
68 | /* |
69 | * variables set up by front end. | |
70 | */ | |
1bcf18f3 | 71 | extern int memfs; /* run as the memory based filesystem */ |
a20edd44 KM |
72 | extern int Nflag; /* run mkfs without writing file system */ |
73 | extern int fssize; /* file system size */ | |
74 | extern int ntracks; /* # tracks/cylinder */ | |
75 | extern int nsectors; /* # sectors/track */ | |
76 | extern int nphyssectors; /* # sectors/track including spares */ | |
77 | extern int secpercyl; /* sectors per cylinder */ | |
78 | extern int sectorsize; /* bytes/sector */ | |
79 | extern int rpm; /* revolutions/minute of drive */ | |
80 | extern int interleave; /* hardware sector interleave */ | |
81 | extern int trackskew; /* sector 0 skew, per track */ | |
82 | extern int headswitch; /* head switch time, usec */ | |
83 | extern int trackseek; /* track-to-track seek, usec */ | |
84 | extern int fsize; /* fragment size */ | |
85 | extern int bsize; /* block size */ | |
86 | extern int cpg; /* cylinders/cylinder group */ | |
7292dd7c | 87 | extern int cpgflg; /* cylinders/cylinder group flag was given */ |
a20edd44 KM |
88 | extern int minfree; /* free space threshold */ |
89 | extern int opt; /* optimization preference (space or time) */ | |
90 | extern int density; /* number of bytes per inode */ | |
91 | extern int maxcontig; /* max contiguous blocks to allocate */ | |
92 | extern int rotdelay; /* rotational delay between blocks */ | |
3d632f12 | 93 | extern int maxbpg; /* maximum blocks per file in a cyl group */ |
62f283da | 94 | extern int nrpos; /* # of distinguished rotational positions */ |
c5d3fd78 MK |
95 | extern int bbsize; /* boot block size */ |
96 | extern int sbsize; /* superblock size */ | |
1bcf18f3 KM |
97 | extern u_long memleft; /* virtual memory available */ |
98 | extern caddr_t membase; /* start address of memory based filesystem */ | |
99 | extern caddr_t malloc(), calloc(); | |
8485bb11 | 100 | |
d746d022 KM |
101 | union { |
102 | struct fs fs; | |
62f283da | 103 | char pad[SBSIZE]; |
d746d022 KM |
104 | } fsun; |
105 | #define sblock fsun.fs | |
106 | struct csum *fscs; | |
107 | ||
108 | union { | |
109 | struct cg cg; | |
b6407c9d | 110 | char pad[MAXBSIZE]; |
d746d022 KM |
111 | } cgun; |
112 | #define acg cgun.cg | |
113 | ||
62f283da | 114 | struct dinode zino[MAXBSIZE / sizeof(struct dinode)]; |
2fd3d252 | 115 | |
8485bb11 | 116 | int fsi, fso; |
2fd3d252 | 117 | time_t utime; |
d746d022 KM |
118 | daddr_t alloc(); |
119 | ||
8485bb11 KM |
120 | mkfs(pp, fsys, fi, fo) |
121 | struct partition *pp; | |
122 | char *fsys; | |
123 | int fi, fo; | |
d746d022 | 124 | { |
7292dd7c KM |
125 | register long i, mincpc, mincpg, inospercg; |
126 | long cylno, rpos, blk, j, warn = 0; | |
127 | long used, mincpgcnt, bpcg; | |
128 | long mapcramped, inodecramped; | |
62f283da | 129 | long postblsize, rotblsize, totalsbsize; |
1bcf18f3 | 130 | int ppid, status, started(); |
d746d022 | 131 | |
d746d022 KM |
132 | #ifndef STANDALONE |
133 | time(&utime); | |
2fd3d252 | 134 | #endif |
1bcf18f3 KM |
135 | if (memfs) { |
136 | ppid = getpid(); | |
137 | (void) signal(SIGUSR1, started); | |
138 | if (i = fork()) { | |
139 | if (i == -1) { | |
140 | perror("memfs"); | |
141 | exit(10); | |
142 | } | |
143 | if (waitpid(i, &status, 0) != -1 && WIFEXITED(status)) | |
144 | exit(WEXITSTATUS(status)); | |
145 | exit(11); | |
146 | /* NOTREACHED */ | |
147 | } | |
148 | (void)malloc(0); | |
149 | if (fssize * sectorsize > memleft) | |
150 | fssize = (memleft - 16384) / sectorsize; | |
151 | if ((membase = malloc(fssize * sectorsize)) == 0) | |
152 | exit(12); | |
153 | } | |
8485bb11 KM |
154 | fsi = fi; |
155 | fso = fo; | |
51fe1c64 KM |
156 | /* |
157 | * Validate the given file system size. | |
158 | * Verify that its last block can actually be accessed. | |
159 | */ | |
2fd3d252 | 160 | if (fssize <= 0) |
1bcf18f3 | 161 | printf("preposterous size %d\n", fssize), exit(13); |
8485bb11 | 162 | wtfs(fssize - 1, sectorsize, (char *)&sblock); |
2fd3d252 KM |
163 | /* |
164 | * collect and verify the sector and track info | |
165 | */ | |
8485bb11 KM |
166 | sblock.fs_nsect = nsectors; |
167 | sblock.fs_ntrak = ntracks; | |
2fd3d252 | 168 | if (sblock.fs_ntrak <= 0) |
1bcf18f3 | 169 | printf("preposterous ntrak %d\n", sblock.fs_ntrak), exit(14); |
2fd3d252 | 170 | if (sblock.fs_nsect <= 0) |
1bcf18f3 | 171 | printf("preposterous nsect %d\n", sblock.fs_nsect), exit(15); |
2fd3d252 KM |
172 | /* |
173 | * collect and verify the block and fragment sizes | |
174 | */ | |
8485bb11 KM |
175 | sblock.fs_bsize = bsize; |
176 | sblock.fs_fsize = fsize; | |
2fd3d252 KM |
177 | if (!POWEROF2(sblock.fs_bsize)) { |
178 | printf("block size must be a power of 2, not %d\n", | |
179 | sblock.fs_bsize); | |
1bcf18f3 | 180 | exit(16); |
d746d022 | 181 | } |
2fd3d252 KM |
182 | if (!POWEROF2(sblock.fs_fsize)) { |
183 | printf("fragment size must be a power of 2, not %d\n", | |
184 | sblock.fs_fsize); | |
1bcf18f3 | 185 | exit(17); |
d746d022 | 186 | } |
8485bb11 | 187 | if (sblock.fs_fsize < sectorsize) { |
b6407c9d | 188 | printf("fragment size %d is too small, minimum is %d\n", |
8485bb11 | 189 | sblock.fs_fsize, sectorsize); |
1bcf18f3 | 190 | exit(18); |
b6407c9d KM |
191 | } |
192 | if (sblock.fs_bsize < MINBSIZE) { | |
193 | printf("block size %d is too small, minimum is %d\n", | |
194 | sblock.fs_bsize, MINBSIZE); | |
1bcf18f3 | 195 | exit(19); |
b6407c9d | 196 | } |
2fd3d252 KM |
197 | if (sblock.fs_bsize < sblock.fs_fsize) { |
198 | printf("block size (%d) cannot be smaller than fragment size (%d)\n", | |
199 | sblock.fs_bsize, sblock.fs_fsize); | |
1bcf18f3 | 200 | exit(20); |
d746d022 | 201 | } |
3352e84a KM |
202 | sblock.fs_bmask = ~(sblock.fs_bsize - 1); |
203 | sblock.fs_fmask = ~(sblock.fs_fsize - 1); | |
62f283da KM |
204 | /* |
205 | * Planning now for future expansion. | |
206 | */ | |
207 | # if (BYTE_ORDER == BIG_ENDIAN) | |
208 | sblock.fs_qbmask.val[0] = 0; | |
209 | sblock.fs_qbmask.val[1] = ~sblock.fs_bmask; | |
210 | sblock.fs_qfmask.val[0] = 0; | |
211 | sblock.fs_qfmask.val[1] = ~sblock.fs_fmask; | |
212 | # endif /* BIG_ENDIAN */ | |
213 | # if (BYTE_ORDER == LITTLE_ENDIAN) | |
214 | sblock.fs_qbmask.val[0] = ~sblock.fs_bmask; | |
215 | sblock.fs_qbmask.val[1] = 0; | |
216 | sblock.fs_qfmask.val[0] = ~sblock.fs_fmask; | |
217 | sblock.fs_qfmask.val[1] = 0; | |
218 | # endif /* LITTLE_ENDIAN */ | |
3352e84a KM |
219 | for (sblock.fs_bshift = 0, i = sblock.fs_bsize; i > 1; i >>= 1) |
220 | sblock.fs_bshift++; | |
221 | for (sblock.fs_fshift = 0, i = sblock.fs_fsize; i > 1; i >>= 1) | |
222 | sblock.fs_fshift++; | |
223 | sblock.fs_frag = numfrags(&sblock, sblock.fs_bsize); | |
19782540 KM |
224 | for (sblock.fs_fragshift = 0, i = sblock.fs_frag; i > 1; i >>= 1) |
225 | sblock.fs_fragshift++; | |
2fd3d252 KM |
226 | if (sblock.fs_frag > MAXFRAG) { |
227 | printf("fragment size %d is too small, minimum with block size %d is %d\n", | |
228 | sblock.fs_fsize, sblock.fs_bsize, | |
229 | sblock.fs_bsize / MAXFRAG); | |
1bcf18f3 | 230 | exit(21); |
d746d022 | 231 | } |
62f283da | 232 | sblock.fs_nrpos = nrpos; |
19782540 KM |
233 | sblock.fs_nindir = sblock.fs_bsize / sizeof(daddr_t); |
234 | sblock.fs_inopb = sblock.fs_bsize / sizeof(struct dinode); | |
8485bb11 KM |
235 | sblock.fs_nspf = sblock.fs_fsize / sectorsize; |
236 | for (sblock.fs_fsbtodb = 0, i = NSPF(&sblock); i > 1; i >>= 1) | |
19782540 | 237 | sblock.fs_fsbtodb++; |
bf541624 | 238 | sblock.fs_sblkno = |
c5d3fd78 | 239 | roundup(howmany(bbsize + sbsize, sblock.fs_fsize), sblock.fs_frag); |
bf541624 | 240 | sblock.fs_cblkno = (daddr_t)(sblock.fs_sblkno + |
c5d3fd78 | 241 | roundup(howmany(sbsize, sblock.fs_fsize), sblock.fs_frag)); |
aca50d72 | 242 | sblock.fs_iblkno = sblock.fs_cblkno + sblock.fs_frag; |
bf541624 | 243 | sblock.fs_cgoffset = roundup( |
8485bb11 | 244 | howmany(sblock.fs_nsect, NSPF(&sblock)), sblock.fs_frag); |
bf541624 KM |
245 | for (sblock.fs_cgmask = 0xffffffff, i = sblock.fs_ntrak; i > 1; i >>= 1) |
246 | sblock.fs_cgmask <<= 1; | |
247 | if (!POWEROF2(sblock.fs_ntrak)) | |
248 | sblock.fs_cgmask <<= 1; | |
7292dd7c KM |
249 | /* |
250 | * Validate specified/determined secpercyl | |
251 | * and calculate minimum cylinders per group. | |
252 | */ | |
253 | sblock.fs_spc = secpercyl; | |
3aaf0f69 KM |
254 | for (sblock.fs_cpc = NSPB(&sblock), i = sblock.fs_spc; |
255 | sblock.fs_cpc > 1 && (i & 1) == 0; | |
256 | sblock.fs_cpc >>= 1, i >>= 1) | |
257 | /* void */; | |
7292dd7c | 258 | mincpc = sblock.fs_cpc; |
7292dd7c KM |
259 | bpcg = sblock.fs_spc * sectorsize; |
260 | inospercg = roundup(bpcg / sizeof(struct dinode), INOPB(&sblock)); | |
62f283da KM |
261 | if (inospercg > MAXIPG(&sblock)) |
262 | inospercg = MAXIPG(&sblock); | |
7292dd7c KM |
263 | used = (sblock.fs_iblkno + inospercg / INOPF(&sblock)) * NSPF(&sblock); |
264 | mincpgcnt = howmany(sblock.fs_cgoffset * (~sblock.fs_cgmask) + used, | |
265 | sblock.fs_spc); | |
266 | mincpg = roundup(mincpgcnt, mincpc); | |
267 | /* | |
268 | * Insure that cylinder group with mincpg has enough space | |
269 | * for block maps | |
270 | */ | |
62f283da KM |
271 | sblock.fs_cpg = mincpg; |
272 | sblock.fs_ipg = inospercg; | |
7292dd7c | 273 | mapcramped = 0; |
62f283da | 274 | while (CGSIZE(&sblock) > sblock.fs_bsize) { |
7292dd7c KM |
275 | mapcramped = 1; |
276 | if (sblock.fs_bsize < MAXBSIZE) { | |
277 | sblock.fs_bsize <<= 1; | |
278 | if ((i & 1) == 0) { | |
279 | i >>= 1; | |
280 | } else { | |
281 | sblock.fs_cpc <<= 1; | |
282 | mincpc <<= 1; | |
283 | mincpg = roundup(mincpgcnt, mincpc); | |
62f283da | 284 | sblock.fs_cpg = mincpg; |
7292dd7c KM |
285 | } |
286 | sblock.fs_frag <<= 1; | |
287 | sblock.fs_fragshift += 1; | |
288 | if (sblock.fs_frag <= MAXFRAG) | |
289 | continue; | |
290 | } | |
291 | if (sblock.fs_fsize == sblock.fs_bsize) { | |
292 | printf("There is no block size that"); | |
293 | printf(" can support this disk\n"); | |
1bcf18f3 | 294 | exit(22); |
7292dd7c KM |
295 | } |
296 | sblock.fs_frag >>= 1; | |
297 | sblock.fs_fragshift -= 1; | |
298 | sblock.fs_fsize <<= 1; | |
299 | sblock.fs_nspf <<= 1; | |
300 | } | |
301 | /* | |
302 | * Insure that cylinder group with mincpg has enough space for inodes | |
303 | */ | |
304 | inodecramped = 0; | |
305 | used *= sectorsize; | |
62f283da KM |
306 | inospercg = roundup((mincpg * bpcg - used) / density, INOPB(&sblock)); |
307 | sblock.fs_ipg = inospercg; | |
308 | while (inospercg > MAXIPG(&sblock)) { | |
7292dd7c KM |
309 | inodecramped = 1; |
310 | if (mincpc == 1 || sblock.fs_frag == 1 || | |
311 | sblock.fs_bsize == MINBSIZE) | |
312 | break; | |
313 | printf("With a block size of %d %s %d\n", sblock.fs_bsize, | |
314 | "minimum bytes per inode is", | |
62f283da | 315 | (mincpg * bpcg - used) / MAXIPG(&sblock) + 1); |
7292dd7c KM |
316 | sblock.fs_bsize >>= 1; |
317 | sblock.fs_frag >>= 1; | |
318 | sblock.fs_fragshift -= 1; | |
319 | mincpc >>= 1; | |
62f283da KM |
320 | sblock.fs_cpg = roundup(mincpgcnt, mincpc); |
321 | if (CGSIZE(&sblock) > sblock.fs_bsize) { | |
7292dd7c KM |
322 | sblock.fs_bsize <<= 1; |
323 | break; | |
324 | } | |
62f283da KM |
325 | mincpg = sblock.fs_cpg; |
326 | inospercg = | |
327 | roundup((mincpg * bpcg - used) / density, INOPB(&sblock)); | |
328 | sblock.fs_ipg = inospercg; | |
7292dd7c KM |
329 | } |
330 | if (inodecramped) { | |
62f283da | 331 | if (inospercg > MAXIPG(&sblock)) { |
7292dd7c | 332 | printf("Minimum bytes per inode is %d\n", |
62f283da | 333 | (mincpg * bpcg - used) / MAXIPG(&sblock) + 1); |
7292dd7c KM |
334 | } else if (!mapcramped) { |
335 | printf("With %d bytes per inode, ", density); | |
336 | printf("minimum cylinders per group is %d\n", mincpg); | |
337 | } | |
338 | } | |
339 | if (mapcramped) { | |
340 | printf("With %d sectors per cylinder, ", sblock.fs_spc); | |
341 | printf("minimum cylinders per group is %d\n", mincpg); | |
342 | } | |
343 | if (inodecramped || mapcramped) { | |
344 | if (sblock.fs_bsize != bsize) | |
345 | printf("%s to be changed from %d to %d\n", | |
346 | "This requires the block size", | |
347 | bsize, sblock.fs_bsize); | |
348 | if (sblock.fs_fsize != fsize) | |
349 | printf("\t%s to be changed from %d to %d\n", | |
350 | "and the fragment size", | |
62f283da | 351 | fsize, sblock.fs_fsize); |
1bcf18f3 | 352 | exit(23); |
173a62ff | 353 | } |
2fd3d252 | 354 | /* |
7292dd7c | 355 | * Calculate the number of cylinders per group |
d746d022 | 356 | */ |
8485bb11 | 357 | sblock.fs_cpg = cpg; |
7292dd7c | 358 | if (sblock.fs_cpg % mincpc != 0) { |
8485bb11 | 359 | printf("%s groups must have a multiple of %d cylinders\n", |
7292dd7c KM |
360 | cpgflg ? "Cylinder" : "Warning: cylinder", mincpc); |
361 | sblock.fs_cpg = roundup(sblock.fs_cpg, mincpc); | |
62f283da KM |
362 | if (!cpgflg) |
363 | cpg = sblock.fs_cpg; | |
8485bb11 | 364 | } |
7292dd7c | 365 | /* |
62f283da | 366 | * Must insure there is enough space for inodes |
7292dd7c | 367 | */ |
62f283da KM |
368 | sblock.fs_ipg = roundup((sblock.fs_cpg * bpcg - used) / density, |
369 | INOPB(&sblock)); | |
370 | while (sblock.fs_ipg > MAXIPG(&sblock)) { | |
371 | inodecramped = 1; | |
7292dd7c | 372 | sblock.fs_cpg -= mincpc; |
62f283da KM |
373 | sblock.fs_ipg = roundup((sblock.fs_cpg * bpcg - used) / density, |
374 | INOPB(&sblock)); | |
2fd3d252 | 375 | } |
7292dd7c | 376 | /* |
62f283da | 377 | * Must insure there is enough space to hold block map |
7292dd7c | 378 | */ |
62f283da KM |
379 | while (CGSIZE(&sblock) > sblock.fs_bsize) { |
380 | mapcramped = 1; | |
7292dd7c | 381 | sblock.fs_cpg -= mincpc; |
62f283da KM |
382 | sblock.fs_ipg = roundup((sblock.fs_cpg * bpcg - used) / density, |
383 | INOPB(&sblock)); | |
7292dd7c | 384 | } |
62f283da | 385 | sblock.fs_fpg = (sblock.fs_cpg * sblock.fs_spc) / NSPF(&sblock); |
7292dd7c | 386 | if ((sblock.fs_cpg * sblock.fs_spc) % NSPB(&sblock) != 0) { |
1bcf18f3 KM |
387 | printf("panic (fs_cpg * fs_spc) % NSPF != 0"); |
388 | exit(24); | |
7292dd7c KM |
389 | } |
390 | if (sblock.fs_cpg < mincpg) { | |
391 | printf("cylinder groups must have at least %d cylinders\n", | |
392 | mincpg); | |
1bcf18f3 | 393 | exit(25); |
7292dd7c KM |
394 | } else if (sblock.fs_cpg != cpg) { |
395 | if (!cpgflg) | |
396 | printf("Warning: "); | |
62f283da | 397 | else if (!mapcramped && !inodecramped) |
1bcf18f3 | 398 | exit(26); |
7292dd7c KM |
399 | if (mapcramped && inodecramped) |
400 | printf("Block size and bytes per inode restrict"); | |
401 | else if (mapcramped) | |
402 | printf("Block size restricts"); | |
403 | else | |
404 | printf("Bytes per inode restrict"); | |
405 | printf(" cylinders per group to %d.\n", sblock.fs_cpg); | |
406 | if (cpgflg) | |
1bcf18f3 | 407 | exit(27); |
3aaf0f69 | 408 | } |
62f283da | 409 | sblock.fs_cgsize = fragroundup(&sblock, CGSIZE(&sblock)); |
2fd3d252 KM |
410 | /* |
411 | * Now have size for file system and nsect and ntrak. | |
412 | * Determine number of cylinders and blocks in the file system. | |
413 | */ | |
414 | sblock.fs_size = fssize = dbtofsb(&sblock, fssize); | |
415 | sblock.fs_ncyl = fssize * NSPF(&sblock) / sblock.fs_spc; | |
aca50d72 | 416 | if (fssize * NSPF(&sblock) > sblock.fs_ncyl * sblock.fs_spc) { |
aca50d72 | 417 | sblock.fs_ncyl++; |
bf541624 | 418 | warn = 1; |
aca50d72 KM |
419 | } |
420 | if (sblock.fs_ncyl < 1) { | |
421 | printf("file systems must have at least one cylinder\n"); | |
1bcf18f3 | 422 | exit(28); |
2fd3d252 | 423 | } |
aca50d72 | 424 | /* |
62f283da KM |
425 | * Determine feasability/values of rotational layout tables. |
426 | * | |
427 | * The size of the rotational layout tables is limited by the | |
428 | * size of the superblock, SBSIZE. The amount of space available | |
429 | * for tables is calculated as (SBSIZE - sizeof (struct fs)). | |
430 | * The size of these tables is inversely proportional to the block | |
431 | * size of the file system. The size increases if sectors per track | |
432 | * are not powers of two, because more cylinders must be described | |
433 | * by the tables before the rotational pattern repeats (fs_cpc). | |
aca50d72 | 434 | */ |
7292dd7c KM |
435 | sblock.fs_interleave = interleave; |
436 | sblock.fs_trackskew = trackskew; | |
437 | sblock.fs_npsect = nphyssectors; | |
62f283da KM |
438 | sblock.fs_postblformat = FS_DYNAMICPOSTBLFMT; |
439 | sblock.fs_sbsize = fragroundup(&sblock, sizeof(struct fs)); | |
aca50d72 KM |
440 | if (sblock.fs_ntrak == 1) { |
441 | sblock.fs_cpc = 0; | |
442 | goto next; | |
443 | } | |
62f283da KM |
444 | postblsize = sblock.fs_nrpos * sblock.fs_cpc * sizeof(short); |
445 | rotblsize = sblock.fs_cpc * sblock.fs_spc / NSPB(&sblock); | |
446 | totalsbsize = sizeof(struct fs) + rotblsize; | |
447 | if (sblock.fs_nrpos == 8 && sblock.fs_cpc <= 16) { | |
448 | /* use old static table space */ | |
449 | sblock.fs_postbloff = (char *)(&sblock.fs_opostbl[0][0]) - | |
450 | (char *)(&sblock.fs_link); | |
451 | sblock.fs_rotbloff = &sblock.fs_space[0] - | |
452 | (u_char *)(&sblock.fs_link); | |
453 | } else { | |
454 | /* use dynamic table space */ | |
455 | sblock.fs_postbloff = &sblock.fs_space[0] - | |
456 | (u_char *)(&sblock.fs_link); | |
457 | sblock.fs_rotbloff = sblock.fs_postbloff + postblsize; | |
458 | totalsbsize += postblsize; | |
459 | } | |
460 | if (totalsbsize > SBSIZE || | |
aca50d72 KM |
461 | sblock.fs_nsect > (1 << NBBY) * NSPB(&sblock)) { |
462 | printf("%s %s %d %s %d.%s", | |
463 | "Warning: insufficient space in super block for\n", | |
464 | "rotational layout tables with nsect", sblock.fs_nsect, | |
465 | "and ntrak", sblock.fs_ntrak, | |
2373c2b8 | 466 | "\nFile system performance may be impared.\n"); |
aca50d72 KM |
467 | sblock.fs_cpc = 0; |
468 | goto next; | |
469 | } | |
62f283da | 470 | sblock.fs_sbsize = fragroundup(&sblock, totalsbsize); |
aca50d72 KM |
471 | /* |
472 | * calculate the available blocks for each rotational position | |
473 | */ | |
62f283da KM |
474 | for (cylno = 0; cylno < sblock.fs_cpc; cylno++) |
475 | for (rpos = 0; rpos < sblock.fs_nrpos; rpos++) | |
476 | fs_postbl(&sblock, cylno)[rpos] = -1; | |
477 | for (i = (rotblsize - 1) * sblock.fs_frag; | |
478 | i >= 0; i -= sblock.fs_frag) { | |
aca50d72 KM |
479 | cylno = cbtocylno(&sblock, i); |
480 | rpos = cbtorpos(&sblock, i); | |
62f283da KM |
481 | blk = fragstoblks(&sblock, i); |
482 | if (fs_postbl(&sblock, cylno)[rpos] == -1) | |
483 | fs_rotbl(&sblock)[blk] = 0; | |
aca50d72 | 484 | else |
62f283da KM |
485 | fs_rotbl(&sblock)[blk] = |
486 | fs_postbl(&sblock, cylno)[rpos] - blk; | |
487 | fs_postbl(&sblock, cylno)[rpos] = blk; | |
aca50d72 KM |
488 | } |
489 | next: | |
d746d022 KM |
490 | /* |
491 | * Compute/validate number of cylinder groups. | |
492 | */ | |
493 | sblock.fs_ncg = sblock.fs_ncyl / sblock.fs_cpg; | |
494 | if (sblock.fs_ncyl % sblock.fs_cpg) | |
495 | sblock.fs_ncg++; | |
aca50d72 | 496 | sblock.fs_dblkno = sblock.fs_iblkno + sblock.fs_ipg / INOPF(&sblock); |
bf541624 KM |
497 | i = MIN(~sblock.fs_cgmask, sblock.fs_ncg - 1); |
498 | if (cgdmin(&sblock, i) - cgbase(&sblock, i) >= sblock.fs_fpg) { | |
d746d022 | 499 | printf("inode blocks/cyl group (%d) >= data blocks (%d)\n", |
bf541624 | 500 | cgdmin(&sblock, i) - cgbase(&sblock, i) / sblock.fs_frag, |
b6407c9d | 501 | sblock.fs_fpg / sblock.fs_frag); |
7292dd7c | 502 | printf("number of cylinders per cylinder group (%d) %s.\n", |
62f283da | 503 | sblock.fs_cpg, "must be increased"); |
1bcf18f3 | 504 | exit(29); |
b6407c9d | 505 | } |
bf541624 KM |
506 | j = sblock.fs_ncg - 1; |
507 | if ((i = fssize - j * sblock.fs_fpg) < sblock.fs_fpg && | |
508 | cgdmin(&sblock, j) - cgbase(&sblock, j) > i) { | |
1bcf18f3 KM |
509 | if (j == 0) { |
510 | printf("Filesystem must have at least %d sectors\n", | |
511 | NSPF(&sblock) * | |
512 | (cgdmin(&sblock, 0) + 3 * sblock.fs_frag)); | |
513 | exit(30); | |
514 | } | |
bf541624 KM |
515 | printf("Warning: inode blocks/cyl group (%d) >= data blocks (%d) in last\n", |
516 | (cgdmin(&sblock, j) - cgbase(&sblock, j)) / sblock.fs_frag, | |
517 | i / sblock.fs_frag); | |
518 | printf(" cylinder group. This implies %d sector(s) cannot be allocated.\n", | |
519 | i * NSPF(&sblock)); | |
520 | sblock.fs_ncg--; | |
521 | sblock.fs_ncyl -= sblock.fs_ncyl % sblock.fs_cpg; | |
522 | sblock.fs_size = fssize = sblock.fs_ncyl * sblock.fs_spc / | |
523 | NSPF(&sblock); | |
524 | warn = 0; | |
525 | } | |
1bcf18f3 | 526 | if (warn && !memfs) { |
bf541624 KM |
527 | printf("Warning: %d sector(s) in last cylinder unallocated\n", |
528 | sblock.fs_spc - | |
529 | (fssize * NSPF(&sblock) - (sblock.fs_ncyl - 1) | |
530 | * sblock.fs_spc)); | |
531 | } | |
2fd3d252 KM |
532 | /* |
533 | * fill in remaining fields of the super block | |
534 | */ | |
6994bf5d | 535 | sblock.fs_csaddr = cgdmin(&sblock, 0); |
bf541624 KM |
536 | sblock.fs_cssize = |
537 | fragroundup(&sblock, sblock.fs_ncg * sizeof(struct csum)); | |
19782540 KM |
538 | i = sblock.fs_bsize / sizeof(struct csum); |
539 | sblock.fs_csmask = ~(i - 1); | |
540 | for (sblock.fs_csshift = 0; i > 1; i >>= 1) | |
541 | sblock.fs_csshift++; | |
bf541624 | 542 | fscs = (struct csum *)calloc(1, sblock.fs_cssize); |
aca50d72 | 543 | sblock.fs_magic = FS_MAGIC; |
8485bb11 KM |
544 | sblock.fs_rotdelay = rotdelay; |
545 | sblock.fs_minfree = minfree; | |
546 | sblock.fs_maxcontig = maxcontig; | |
a20edd44 KM |
547 | sblock.fs_headswitch = headswitch; |
548 | sblock.fs_trkseek = trackseek; | |
3d632f12 | 549 | sblock.fs_maxbpg = maxbpg; |
8485bb11 KM |
550 | sblock.fs_rps = rpm / 60; |
551 | sblock.fs_optim = opt; | |
2fd3d252 KM |
552 | sblock.fs_cgrotor = 0; |
553 | sblock.fs_cstotal.cs_ndir = 0; | |
554 | sblock.fs_cstotal.cs_nbfree = 0; | |
555 | sblock.fs_cstotal.cs_nifree = 0; | |
556 | sblock.fs_cstotal.cs_nffree = 0; | |
d746d022 KM |
557 | sblock.fs_fmod = 0; |
558 | sblock.fs_ronly = 0; | |
d746d022 | 559 | /* |
2fd3d252 | 560 | * Dump out summary information about file system. |
d746d022 | 561 | */ |
1bcf18f3 KM |
562 | if (!memfs) { |
563 | printf("%s:\t%d sectors in %d %s of %d tracks, %d sectors\n", | |
564 | fsys, sblock.fs_size * NSPF(&sblock), sblock.fs_ncyl, | |
565 | "cylinders", sblock.fs_ntrak, sblock.fs_nsect); | |
566 | printf("\t%.1fMB in %d cyl groups (%d c/g, %.2fMB/g, %d i/g)\n", | |
567 | (float)sblock.fs_size * sblock.fs_fsize * 1e-6, | |
568 | sblock.fs_ncg, sblock.fs_cpg, | |
569 | (float)sblock.fs_fpg * sblock.fs_fsize * 1e-6, | |
570 | sblock.fs_ipg); | |
571 | } | |
d746d022 KM |
572 | /* |
573 | * Now build the cylinders group blocks and | |
2fd3d252 | 574 | * then print out indices of cylinder groups. |
d746d022 | 575 | */ |
1bcf18f3 KM |
576 | if (!memfs) |
577 | printf("super-block backups (for fsck -b #) at:"); | |
bf541624 | 578 | for (cylno = 0; cylno < sblock.fs_ncg; cylno++) { |
aca50d72 | 579 | initcg(cylno); |
1bcf18f3 KM |
580 | if (memfs) |
581 | continue; | |
7292dd7c | 582 | if (cylno % 9 == 0) |
bf541624 KM |
583 | printf("\n"); |
584 | printf(" %d,", fsbtodb(&sblock, cgsblock(&sblock, cylno))); | |
585 | } | |
1bcf18f3 KM |
586 | if (!memfs) |
587 | printf("\n"); | |
588 | if (Nflag && !memfs) | |
56a085eb | 589 | exit(0); |
d746d022 | 590 | /* |
2fd3d252 | 591 | * Now construct the initial file system, |
d746d022 KM |
592 | * then write out the super-block. |
593 | */ | |
2fd3d252 | 594 | fsinit(); |
d746d022 | 595 | sblock.fs_time = utime; |
c5d3fd78 | 596 | wtfs(SBOFF / sectorsize, sbsize, (char *)&sblock); |
b6407c9d | 597 | for (i = 0; i < sblock.fs_cssize; i += sblock.fs_bsize) |
3352e84a | 598 | wtfs(fsbtodb(&sblock, sblock.fs_csaddr + numfrags(&sblock, i)), |
bf541624 KM |
599 | sblock.fs_cssize - i < sblock.fs_bsize ? |
600 | sblock.fs_cssize - i : sblock.fs_bsize, | |
601 | ((char *)fscs) + i); | |
2fd3d252 KM |
602 | /* |
603 | * Write out the duplicate super blocks | |
604 | */ | |
c2b9e883 | 605 | for (cylno = 0; cylno < sblock.fs_ncg; cylno++) |
bf541624 | 606 | wtfs(fsbtodb(&sblock, cgsblock(&sblock, cylno)), |
c5d3fd78 | 607 | sbsize, (char *)&sblock); |
8485bb11 KM |
608 | /* |
609 | * Update information about this partion in pack | |
610 | * label, to that it may be updated on disk. | |
611 | */ | |
612 | pp->p_fstype = FS_BSDFFS; | |
613 | pp->p_fsize = sblock.fs_fsize; | |
614 | pp->p_frag = sblock.fs_frag; | |
615 | pp->p_cpg = sblock.fs_cpg; | |
1bcf18f3 KM |
616 | /* |
617 | * Notify parent process of success. | |
618 | */ | |
619 | if (memfs) | |
620 | kill(ppid, SIGUSR1); | |
d746d022 KM |
621 | } |
622 | ||
623 | /* | |
624 | * Initialize a cylinder group. | |
625 | */ | |
aca50d72 KM |
626 | initcg(cylno) |
627 | int cylno; | |
d746d022 | 628 | { |
bf541624 | 629 | daddr_t cbase, d, dlower, dupper, dmax; |
d746d022 KM |
630 | long i, j, s; |
631 | register struct csum *cs; | |
632 | ||
633 | /* | |
634 | * Determine block bounds for cylinder group. | |
635 | * Allow space for super block summary information in first | |
636 | * cylinder group. | |
637 | */ | |
6994bf5d | 638 | cbase = cgbase(&sblock, cylno); |
d746d022 KM |
639 | dmax = cbase + sblock.fs_fpg; |
640 | if (dmax > sblock.fs_size) | |
641 | dmax = sblock.fs_size; | |
bf541624 KM |
642 | dlower = cgsblock(&sblock, cylno) - cbase; |
643 | dupper = cgdmin(&sblock, cylno) - cbase; | |
62f283da KM |
644 | if (cylno == 0) |
645 | dupper += howmany(sblock.fs_cssize, sblock.fs_fsize); | |
aca50d72 | 646 | cs = fscs + cylno; |
d746d022 KM |
647 | acg.cg_time = utime; |
648 | acg.cg_magic = CG_MAGIC; | |
aca50d72 | 649 | acg.cg_cgx = cylno; |
bb40745e KM |
650 | if (cylno == sblock.fs_ncg - 1) |
651 | acg.cg_ncyl = sblock.fs_ncyl % sblock.fs_cpg; | |
652 | else | |
653 | acg.cg_ncyl = sblock.fs_cpg; | |
d746d022 KM |
654 | acg.cg_niblk = sblock.fs_ipg; |
655 | acg.cg_ndblk = dmax - cbase; | |
0947395d KM |
656 | acg.cg_cs.cs_ndir = 0; |
657 | acg.cg_cs.cs_nffree = 0; | |
658 | acg.cg_cs.cs_nbfree = 0; | |
659 | acg.cg_cs.cs_nifree = 0; | |
bf541624 KM |
660 | acg.cg_rotor = 0; |
661 | acg.cg_frotor = 0; | |
92ea6158 | 662 | acg.cg_irotor = 0; |
62f283da KM |
663 | acg.cg_btotoff = &acg.cg_space[0] - (u_char *)(&acg.cg_link); |
664 | acg.cg_boff = acg.cg_btotoff + sblock.fs_cpg * sizeof(long); | |
665 | acg.cg_iusedoff = acg.cg_boff + | |
666 | sblock.fs_cpg * sblock.fs_nrpos * sizeof(short); | |
667 | acg.cg_freeoff = acg.cg_iusedoff + howmany(sblock.fs_ipg, NBBY); | |
668 | acg.cg_nextfreeoff = acg.cg_freeoff + | |
669 | howmany(sblock.fs_cpg * sblock.fs_spc / NSPF(&sblock), NBBY); | |
b6407c9d | 670 | for (i = 0; i < sblock.fs_frag; i++) { |
f3c028b7 KM |
671 | acg.cg_frsum[i] = 0; |
672 | } | |
62f283da KM |
673 | bzero((caddr_t)cg_inosused(&acg), acg.cg_freeoff - acg.cg_iusedoff); |
674 | acg.cg_cs.cs_nifree += sblock.fs_ipg; | |
aca50d72 | 675 | if (cylno == 0) |
2fd3d252 | 676 | for (i = 0; i < ROOTINO; i++) { |
62f283da | 677 | setbit(cg_inosused(&acg), i); |
2fd3d252 KM |
678 | acg.cg_cs.cs_nifree--; |
679 | } | |
62f283da KM |
680 | for (i = 0; i < sblock.fs_ipg / INOPF(&sblock); i += sblock.fs_frag) |
681 | wtfs(fsbtodb(&sblock, cgimin(&sblock, cylno) + i), | |
682 | sblock.fs_bsize, (char *)zino); | |
683 | bzero((caddr_t)cg_blktot(&acg), acg.cg_boff - acg.cg_btotoff); | |
684 | bzero((caddr_t)cg_blks(&sblock, &acg, 0), | |
685 | acg.cg_iusedoff - acg.cg_boff); | |
686 | bzero((caddr_t)cg_blksfree(&acg), acg.cg_nextfreeoff - acg.cg_freeoff); | |
687 | if (cylno > 0) { | |
bf541624 | 688 | /* |
62f283da KM |
689 | * In cylno 0, beginning space is reserved |
690 | * for boot and super blocks. | |
bf541624 | 691 | */ |
bf541624 | 692 | for (d = 0; d < dlower; d += sblock.fs_frag) { |
62f283da | 693 | setblock(&sblock, cg_blksfree(&acg), d/sblock.fs_frag); |
bf541624 | 694 | acg.cg_cs.cs_nbfree++; |
62f283da KM |
695 | cg_blktot(&acg)[cbtocylno(&sblock, d)]++; |
696 | cg_blks(&sblock, &acg, cbtocylno(&sblock, d)) | |
697 | [cbtorpos(&sblock, d)]++; | |
bf541624 KM |
698 | } |
699 | sblock.fs_dsize += dlower; | |
d746d022 | 700 | } |
bf541624 | 701 | sblock.fs_dsize += acg.cg_ndblk - dupper; |
62f283da KM |
702 | if (i = dupper % sblock.fs_frag) { |
703 | acg.cg_frsum[sblock.fs_frag - i]++; | |
704 | for (d = dupper + sblock.fs_frag - i; dupper < d; dupper++) { | |
705 | setbit(cg_blksfree(&acg), dupper); | |
bf541624 KM |
706 | acg.cg_cs.cs_nffree++; |
707 | } | |
708 | } | |
62f283da KM |
709 | for (d = dupper; d + sblock.fs_frag <= dmax - cbase; ) { |
710 | setblock(&sblock, cg_blksfree(&acg), d / sblock.fs_frag); | |
0947395d | 711 | acg.cg_cs.cs_nbfree++; |
62f283da KM |
712 | cg_blktot(&acg)[cbtocylno(&sblock, d)]++; |
713 | cg_blks(&sblock, &acg, cbtocylno(&sblock, d)) | |
714 | [cbtorpos(&sblock, d)]++; | |
b6407c9d | 715 | d += sblock.fs_frag; |
d746d022 | 716 | } |
bf541624 | 717 | if (d < dmax - cbase) { |
aca50d72 | 718 | acg.cg_frsum[dmax - cbase - d]++; |
56d45dcd | 719 | for (; d < dmax - cbase; d++) { |
62f283da | 720 | setbit(cg_blksfree(&acg), d); |
0947395d | 721 | acg.cg_cs.cs_nffree++; |
56d45dcd | 722 | } |
bf541624 | 723 | } |
0947395d KM |
724 | sblock.fs_cstotal.cs_ndir += acg.cg_cs.cs_ndir; |
725 | sblock.fs_cstotal.cs_nffree += acg.cg_cs.cs_nffree; | |
726 | sblock.fs_cstotal.cs_nbfree += acg.cg_cs.cs_nbfree; | |
727 | sblock.fs_cstotal.cs_nifree += acg.cg_cs.cs_nifree; | |
728 | *cs = acg.cg_cs; | |
6994bf5d | 729 | wtfs(fsbtodb(&sblock, cgtod(&sblock, cylno)), |
b6407c9d | 730 | sblock.fs_bsize, (char *)&acg); |
d746d022 KM |
731 | } |
732 | ||
2fd3d252 KM |
733 | /* |
734 | * initialize the file system | |
735 | */ | |
736 | struct inode node; | |
8485bb11 KM |
737 | |
738 | #ifdef LOSTDIR | |
2fd3d252 | 739 | #define PREDEFDIR 3 |
8485bb11 KM |
740 | #else |
741 | #define PREDEFDIR 2 | |
742 | #endif | |
743 | ||
052efd62 KM |
744 | struct direct root_dir[] = { |
745 | { ROOTINO, sizeof(struct direct), 1, "." }, | |
746 | { ROOTINO, sizeof(struct direct), 2, ".." }, | |
8485bb11 | 747 | #ifdef LOSTDIR |
052efd62 | 748 | { LOSTFOUNDINO, sizeof(struct direct), 10, "lost+found" }, |
8485bb11 | 749 | #endif |
2fd3d252 | 750 | }; |
8485bb11 | 751 | #ifdef LOSTDIR |
052efd62 KM |
752 | struct direct lost_found_dir[] = { |
753 | { LOSTFOUNDINO, sizeof(struct direct), 1, "." }, | |
754 | { ROOTINO, sizeof(struct direct), 2, ".." }, | |
755 | { 0, DIRBLKSIZ, 0, 0 }, | |
2fd3d252 | 756 | }; |
8485bb11 | 757 | #endif |
052efd62 | 758 | char buf[MAXBSIZE]; |
2fd3d252 KM |
759 | |
760 | fsinit() | |
d746d022 | 761 | { |
052efd62 KM |
762 | int i; |
763 | ||
d746d022 | 764 | /* |
2fd3d252 | 765 | * initialize the node |
d746d022 | 766 | */ |
2fd3d252 KM |
767 | node.i_atime = utime; |
768 | node.i_mtime = utime; | |
769 | node.i_ctime = utime; | |
8485bb11 | 770 | #ifdef LOSTDIR |
d746d022 | 771 | /* |
2fd3d252 | 772 | * create the lost+found directory |
d746d022 | 773 | */ |
052efd62 KM |
774 | (void)makedir(lost_found_dir, 2); |
775 | for (i = DIRBLKSIZ; i < sblock.fs_bsize; i += DIRBLKSIZ) | |
776 | bcopy(&lost_found_dir[2], &buf[i], DIRSIZ(&lost_found_dir[2])); | |
2fd3d252 KM |
777 | node.i_number = LOSTFOUNDINO; |
778 | node.i_mode = IFDIR | UMASK; | |
779 | node.i_nlink = 2; | |
780 | node.i_size = sblock.fs_bsize; | |
781 | node.i_db[0] = alloc(node.i_size, node.i_mode); | |
cdbcf1b5 | 782 | node.i_blocks = btodb(fragroundup(&sblock, node.i_size)); |
052efd62 | 783 | wtfs(fsbtodb(&sblock, node.i_db[0]), node.i_size, buf); |
2fd3d252 | 784 | iput(&node); |
8485bb11 | 785 | #endif |
2fd3d252 KM |
786 | /* |
787 | * create the root directory | |
788 | */ | |
789 | node.i_number = ROOTINO; | |
1bcf18f3 KM |
790 | if (memfs) |
791 | node.i_mode = IFDIR | 01777; | |
792 | else | |
793 | node.i_mode = IFDIR | UMASK; | |
2fd3d252 | 794 | node.i_nlink = PREDEFDIR; |
052efd62 | 795 | node.i_size = makedir(root_dir, PREDEFDIR); |
2fd3d252 | 796 | node.i_db[0] = alloc(sblock.fs_fsize, node.i_mode); |
cdbcf1b5 | 797 | node.i_blocks = btodb(fragroundup(&sblock, node.i_size)); |
052efd62 | 798 | wtfs(fsbtodb(&sblock, node.i_db[0]), sblock.fs_fsize, buf); |
2fd3d252 | 799 | iput(&node); |
d746d022 KM |
800 | } |
801 | ||
052efd62 KM |
802 | /* |
803 | * construct a set of directory entries in "buf". | |
804 | * return size of directory. | |
805 | */ | |
806 | makedir(protodir, entries) | |
807 | register struct direct *protodir; | |
808 | int entries; | |
809 | { | |
810 | char *cp; | |
811 | int i, spcleft; | |
812 | ||
813 | spcleft = DIRBLKSIZ; | |
814 | for (cp = buf, i = 0; i < entries - 1; i++) { | |
815 | protodir[i].d_reclen = DIRSIZ(&protodir[i]); | |
816 | bcopy(&protodir[i], cp, protodir[i].d_reclen); | |
817 | cp += protodir[i].d_reclen; | |
818 | spcleft -= protodir[i].d_reclen; | |
819 | } | |
820 | protodir[i].d_reclen = spcleft; | |
821 | bcopy(&protodir[i], cp, DIRSIZ(&protodir[i])); | |
4b47cead | 822 | return (DIRBLKSIZ); |
052efd62 KM |
823 | } |
824 | ||
2fd3d252 KM |
825 | /* |
826 | * allocate a block or frag | |
827 | */ | |
d746d022 | 828 | daddr_t |
07670f7d KM |
829 | alloc(size, mode) |
830 | int size; | |
831 | int mode; | |
d746d022 | 832 | { |
aca50d72 | 833 | int i, frag; |
d746d022 KM |
834 | daddr_t d; |
835 | ||
3352e84a KM |
836 | rdfs(fsbtodb(&sblock, cgtod(&sblock, 0)), sblock.fs_cgsize, |
837 | (char *)&acg); | |
bf541624 KM |
838 | if (acg.cg_magic != CG_MAGIC) { |
839 | printf("cg 0: bad magic number\n"); | |
840 | return (0); | |
841 | } | |
0947395d | 842 | if (acg.cg_cs.cs_nbfree == 0) { |
d746d022 KM |
843 | printf("first cylinder group ran out of space\n"); |
844 | return (0); | |
845 | } | |
b6407c9d | 846 | for (d = 0; d < acg.cg_ndblk; d += sblock.fs_frag) |
62f283da | 847 | if (isblock(&sblock, cg_blksfree(&acg), d / sblock.fs_frag)) |
d746d022 KM |
848 | goto goth; |
849 | printf("internal error: can't find block in cyl 0\n"); | |
850 | return (0); | |
851 | goth: | |
62f283da | 852 | clrblock(&sblock, cg_blksfree(&acg), d / sblock.fs_frag); |
0947395d KM |
853 | acg.cg_cs.cs_nbfree--; |
854 | sblock.fs_cstotal.cs_nbfree--; | |
d746d022 | 855 | fscs[0].cs_nbfree--; |
07670f7d | 856 | if (mode & IFDIR) { |
0947395d KM |
857 | acg.cg_cs.cs_ndir++; |
858 | sblock.fs_cstotal.cs_ndir++; | |
07670f7d KM |
859 | fscs[0].cs_ndir++; |
860 | } | |
62f283da KM |
861 | cg_blktot(&acg)[cbtocylno(&sblock, d)]--; |
862 | cg_blks(&sblock, &acg, cbtocylno(&sblock, d))[cbtorpos(&sblock, d)]--; | |
b6407c9d KM |
863 | if (size != sblock.fs_bsize) { |
864 | frag = howmany(size, sblock.fs_fsize); | |
865 | fscs[0].cs_nffree += sblock.fs_frag - frag; | |
866 | sblock.fs_cstotal.cs_nffree += sblock.fs_frag - frag; | |
867 | acg.cg_cs.cs_nffree += sblock.fs_frag - frag; | |
868 | acg.cg_frsum[sblock.fs_frag - frag]++; | |
869 | for (i = frag; i < sblock.fs_frag; i++) | |
62f283da | 870 | setbit(cg_blksfree(&acg), d + i); |
d746d022 | 871 | } |
3352e84a KM |
872 | wtfs(fsbtodb(&sblock, cgtod(&sblock, 0)), sblock.fs_cgsize, |
873 | (char *)&acg); | |
d746d022 KM |
874 | return (d); |
875 | } | |
876 | ||
2fd3d252 KM |
877 | /* |
878 | * Allocate an inode on the disk | |
879 | */ | |
880 | iput(ip) | |
881 | register struct inode *ip; | |
d746d022 | 882 | { |
2fd3d252 | 883 | struct dinode buf[MAXINOPB]; |
d746d022 | 884 | daddr_t d; |
2fd3d252 | 885 | int c; |
d746d022 | 886 | |
6994bf5d | 887 | c = itog(&sblock, ip->i_number); |
3352e84a KM |
888 | rdfs(fsbtodb(&sblock, cgtod(&sblock, 0)), sblock.fs_cgsize, |
889 | (char *)&acg); | |
bf541624 KM |
890 | if (acg.cg_magic != CG_MAGIC) { |
891 | printf("cg 0: bad magic number\n"); | |
1bcf18f3 | 892 | exit(31); |
bf541624 | 893 | } |
0947395d | 894 | acg.cg_cs.cs_nifree--; |
62f283da | 895 | setbit(cg_inosused(&acg), ip->i_number); |
3352e84a KM |
896 | wtfs(fsbtodb(&sblock, cgtod(&sblock, 0)), sblock.fs_cgsize, |
897 | (char *)&acg); | |
0947395d | 898 | sblock.fs_cstotal.cs_nifree--; |
d746d022 | 899 | fscs[0].cs_nifree--; |
62f283da | 900 | if (ip->i_number >= sblock.fs_ipg * sblock.fs_ncg) { |
2fd3d252 KM |
901 | printf("fsinit: inode value out of range (%d).\n", |
902 | ip->i_number); | |
1bcf18f3 | 903 | exit(32); |
d746d022 | 904 | } |
6994bf5d | 905 | d = fsbtodb(&sblock, itod(&sblock, ip->i_number)); |
2fd3d252 | 906 | rdfs(d, sblock.fs_bsize, buf); |
6994bf5d | 907 | buf[itoo(&sblock, ip->i_number)].di_ic = ip->i_ic; |
2fd3d252 KM |
908 | wtfs(d, sblock.fs_bsize, buf); |
909 | } | |
910 | ||
1bcf18f3 KM |
911 | /* |
912 | * Notify parent process that the filesystem has created itself successfully. | |
913 | */ | |
914 | started() | |
915 | { | |
916 | ||
917 | exit(0); | |
918 | } | |
919 | ||
920 | /* | |
921 | * Replace libc function with one suited to our needs. | |
922 | */ | |
923 | caddr_t | |
924 | malloc(size) | |
925 | register u_long size; | |
926 | { | |
927 | u_long base, i; | |
928 | static u_long pgsz; | |
929 | struct rlimit rlp; | |
930 | ||
931 | if (pgsz == 0) { | |
932 | base = sbrk(0); | |
933 | pgsz = getpagesize() - 1; | |
934 | i = (base + pgsz) &~ pgsz; | |
935 | base = sbrk(i - base); | |
936 | if (getrlimit(RLIMIT_DATA, &rlp) < 0) | |
937 | perror("getrlimit"); | |
938 | rlp.rlim_cur = rlp.rlim_max; | |
939 | if (setrlimit(RLIMIT_DATA, &rlp) < 0) | |
940 | perror("setrlimit"); | |
941 | memleft = rlp.rlim_max - base; | |
942 | } | |
943 | size = (size + pgsz) &~ pgsz; | |
944 | if (size > memleft) | |
945 | size = memleft; | |
946 | memleft -= size; | |
947 | if (size == 0) | |
948 | return (0); | |
949 | return ((caddr_t)sbrk(size)); | |
950 | } | |
951 | ||
952 | /* | |
953 | * Replace libc function with one suited to our needs. | |
954 | */ | |
955 | caddr_t | |
956 | realloc(ptr, size) | |
957 | char *ptr; | |
958 | u_long size; | |
959 | { | |
960 | ||
961 | /* always fail for now */ | |
962 | return ((caddr_t)0); | |
963 | } | |
964 | ||
965 | /* | |
966 | * Replace libc function with one suited to our needs. | |
967 | */ | |
968 | char * | |
969 | calloc(size, numelm) | |
970 | u_long size, numelm; | |
971 | { | |
972 | caddr_t base; | |
973 | ||
974 | size *= numelm; | |
975 | base = malloc(size); | |
976 | bzero(base, size); | |
977 | return (base); | |
978 | } | |
979 | ||
980 | /* | |
981 | * Replace libc function with one suited to our needs. | |
982 | */ | |
983 | free(ptr) | |
984 | char *ptr; | |
985 | { | |
986 | ||
987 | /* do not worry about it for now */ | |
988 | } | |
989 | ||
2fd3d252 KM |
990 | /* |
991 | * read a block from the file system | |
992 | */ | |
993 | rdfs(bno, size, bf) | |
994 | daddr_t bno; | |
995 | int size; | |
996 | char *bf; | |
997 | { | |
998 | int n; | |
999 | ||
1bcf18f3 KM |
1000 | if (memfs) { |
1001 | bcopy(membase + bno * sectorsize, bf, size); | |
1002 | return; | |
1003 | } | |
8485bb11 | 1004 | if (lseek(fsi, bno * sectorsize, 0) < 0) { |
c312eebd KM |
1005 | printf("seek error: %ld\n", bno); |
1006 | perror("rdfs"); | |
1bcf18f3 | 1007 | exit(33); |
c312eebd | 1008 | } |
2fd3d252 KM |
1009 | n = read(fsi, bf, size); |
1010 | if(n != size) { | |
1011 | printf("read error: %ld\n", bno); | |
c312eebd | 1012 | perror("rdfs"); |
1bcf18f3 | 1013 | exit(34); |
b6407c9d | 1014 | } |
b6407c9d KM |
1015 | } |
1016 | ||
1017 | /* | |
2fd3d252 | 1018 | * write a block to the file system |
b6407c9d | 1019 | */ |
2fd3d252 KM |
1020 | wtfs(bno, size, bf) |
1021 | daddr_t bno; | |
1022 | int size; | |
1023 | char *bf; | |
1024 | { | |
1025 | int n; | |
1026 | ||
1bcf18f3 KM |
1027 | if (memfs) { |
1028 | bcopy(bf, membase + bno * sectorsize, size); | |
1029 | return; | |
1030 | } | |
56a085eb KM |
1031 | if (Nflag) |
1032 | return; | |
8485bb11 | 1033 | if (lseek(fso, bno * sectorsize, 0) < 0) { |
c312eebd KM |
1034 | printf("seek error: %ld\n", bno); |
1035 | perror("wtfs"); | |
1bcf18f3 | 1036 | exit(35); |
c312eebd | 1037 | } |
2fd3d252 KM |
1038 | n = write(fso, bf, size); |
1039 | if(n != size) { | |
5997b76f | 1040 | printf("write error: %ld\n", bno); |
c312eebd | 1041 | perror("wtfs"); |
1bcf18f3 | 1042 | exit(36); |
2fd3d252 KM |
1043 | } |
1044 | } | |
b6407c9d | 1045 | |
2fd3d252 KM |
1046 | /* |
1047 | * check if a block is available | |
1048 | */ | |
b6407c9d KM |
1049 | isblock(fs, cp, h) |
1050 | struct fs *fs; | |
1051 | unsigned char *cp; | |
1052 | int h; | |
1053 | { | |
1054 | unsigned char mask; | |
1055 | ||
1056 | switch (fs->fs_frag) { | |
1057 | case 8: | |
1058 | return (cp[h] == 0xff); | |
1059 | case 4: | |
1060 | mask = 0x0f << ((h & 0x1) << 2); | |
1061 | return ((cp[h >> 1] & mask) == mask); | |
1062 | case 2: | |
1063 | mask = 0x03 << ((h & 0x3) << 1); | |
1064 | return ((cp[h >> 2] & mask) == mask); | |
1065 | case 1: | |
1066 | mask = 0x01 << (h & 0x7); | |
1067 | return ((cp[h >> 3] & mask) == mask); | |
1068 | default: | |
4384e5a5 KM |
1069 | #ifdef STANDALONE |
1070 | printf("isblock bad fs_frag %d\n", fs->fs_frag); | |
1071 | #else | |
b6407c9d | 1072 | fprintf(stderr, "isblock bad fs_frag %d\n", fs->fs_frag); |
4384e5a5 | 1073 | #endif |
edc611b2 | 1074 | return (0); |
b6407c9d KM |
1075 | } |
1076 | } | |
1077 | ||
2fd3d252 KM |
1078 | /* |
1079 | * take a block out of the map | |
1080 | */ | |
b6407c9d KM |
1081 | clrblock(fs, cp, h) |
1082 | struct fs *fs; | |
1083 | unsigned char *cp; | |
1084 | int h; | |
1085 | { | |
1086 | switch ((fs)->fs_frag) { | |
1087 | case 8: | |
1088 | cp[h] = 0; | |
1089 | return; | |
1090 | case 4: | |
1091 | cp[h >> 1] &= ~(0x0f << ((h & 0x1) << 2)); | |
1092 | return; | |
1093 | case 2: | |
1094 | cp[h >> 2] &= ~(0x03 << ((h & 0x3) << 1)); | |
1095 | return; | |
1096 | case 1: | |
1097 | cp[h >> 3] &= ~(0x01 << (h & 0x7)); | |
1098 | return; | |
1099 | default: | |
4384e5a5 KM |
1100 | #ifdef STANDALONE |
1101 | printf("clrblock bad fs_frag %d\n", fs->fs_frag); | |
1102 | #else | |
b6407c9d | 1103 | fprintf(stderr, "clrblock bad fs_frag %d\n", fs->fs_frag); |
4384e5a5 | 1104 | #endif |
b6407c9d KM |
1105 | return; |
1106 | } | |
1107 | } | |
1108 | ||
2fd3d252 KM |
1109 | /* |
1110 | * put a block into the map | |
1111 | */ | |
b6407c9d KM |
1112 | setblock(fs, cp, h) |
1113 | struct fs *fs; | |
1114 | unsigned char *cp; | |
1115 | int h; | |
1116 | { | |
1117 | switch (fs->fs_frag) { | |
1118 | case 8: | |
1119 | cp[h] = 0xff; | |
1120 | return; | |
1121 | case 4: | |
1122 | cp[h >> 1] |= (0x0f << ((h & 0x1) << 2)); | |
1123 | return; | |
1124 | case 2: | |
1125 | cp[h >> 2] |= (0x03 << ((h & 0x3) << 1)); | |
1126 | return; | |
1127 | case 1: | |
1128 | cp[h >> 3] |= (0x01 << (h & 0x7)); | |
1129 | return; | |
1130 | default: | |
4384e5a5 KM |
1131 | #ifdef STANDALONE |
1132 | printf("setblock bad fs_frag %d\n", fs->fs_frag); | |
1133 | #else | |
b6407c9d | 1134 | fprintf(stderr, "setblock bad fs_frag %d\n", fs->fs_frag); |
4384e5a5 | 1135 | #endif |
b6407c9d | 1136 | return; |
d746d022 | 1137 | } |
d746d022 | 1138 | } |