1 /* $NetBSD: mkfs.c,v 1.20 2004/06/24 22:30:13 lukem Exp $ */
4 * Copyright (c) 2002 Networks Associates Technology, Inc.
7 * This software was developed for the FreeBSD Project by Marshall
8 * Kirk McKusick and Network Associates Laboratories, the Security
9 * Research Division of Network Associates, Inc. under DARPA/SPAWAR
10 * contract N66001-01-C-8035 ("CBOSS"), as part of the DARPA CHATS
13 * Copyright (c) 1980, 1989, 1993
14 * The Regents of the University of California. All rights reserved.
16 * Redistribution and use in source and binary forms, with or without
17 * modification, are permitted provided that the following conditions
19 * 1. Redistributions of source code must retain the above copyright
20 * notice, this list of conditions and the following disclaimer.
21 * 2. Redistributions in binary form must reproduce the above copyright
22 * notice, this list of conditions and the following disclaimer in the
23 * documentation and/or other materials provided with the distribution.
24 * 3. Neither the name of the University nor the names of its contributors
25 * may be used to endorse or promote products derived from this software
26 * without specific prior written permission.
28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
41 #include <sys/cdefs.h>
42 __FBSDID("$FreeBSD$");
44 #include <sys/param.h>
46 #include <sys/resource.h>
57 #include <ufs/ufs/dinode.h>
58 #include <ufs/ffs/fs.h>
60 #include "ffs/ufs_bswap.h"
61 #include "ffs/ufs_inode.h"
62 #include "ffs/ffs_extern.h"
63 #include "ffs/newfs_extern.h"
66 #define BBSIZE 8192 /* size of boot area, with label */
69 static void initcg(int, time_t, const fsinfo_t *);
70 static int ilog2(int);
72 static int count_digits(int);
75 * make file system for cylinder-group style file systems
78 #define POWEROF2(num) (((num) & ((num) - 1)) == 0)
84 #define sblock fsun.fs
89 char pad[FFS_MAXBSIZE];
96 char writebuf[FFS_MAXBSIZE];
98 static int Oflag; /* format as an 4.3BSD file system */
99 static int64_t fssize; /* file system size */
100 static int sectorsize; /* bytes/sector */
101 static int fsize; /* fragment size */
102 static int bsize; /* block size */
103 static int maxbsize; /* maximum clustering */
104 static int maxblkspercg;
105 static int minfree; /* free space threshold */
106 static int opt; /* optimization preference (space or time) */
107 static int density; /* number of bytes per inode */
108 static int maxcontig; /* max contiguous blocks to allocate */
109 static int maxbpg; /* maximum blocks per file in a cyl group */
110 static int bbsize; /* boot block size */
111 static int sbsize; /* superblock size */
112 static int avgfilesize; /* expected average file size */
113 static int avgfpdir; /* expected number of files per directory */
116 ffs_mkfs(const char *fsys, const fsinfo_t *fsopts)
118 int fragsperinode, optimalfpg, origdensity, minfpg, lastminfpg;
119 int32_t cylno, i, csfrags;
123 int nprintcols, printcolwidth;
124 ffs_opt_t *ffs_opts = fsopts->fs_specific;
126 Oflag = ffs_opts->version;
127 fssize = fsopts->size / fsopts->sectorsize;
128 sectorsize = fsopts->sectorsize;
129 fsize = ffs_opts->fsize;
130 bsize = ffs_opts->bsize;
131 maxbsize = ffs_opts->maxbsize;
132 maxblkspercg = ffs_opts->maxblkspercg;
133 minfree = ffs_opts->minfree;
134 opt = ffs_opts->optimization;
135 density = ffs_opts->density;
136 maxcontig = ffs_opts->maxcontig;
137 maxbpg = ffs_opts->maxbpg;
138 avgfilesize = ffs_opts->avgfilesize;
139 avgfpdir = ffs_opts->avgfpdir;
144 sblock.fs_old_inodefmt = FS_42INODEFMT;
145 sblock.fs_maxsymlinklen = 0;
146 sblock.fs_old_flags = 0;
148 sblock.fs_old_inodefmt = FS_44INODEFMT;
149 sblock.fs_maxsymlinklen = (Oflag == 1 ? MAXSYMLINKLEN_UFS1 :
151 sblock.fs_old_flags = FS_FLAGS_UPDATED;
155 * Validate the given file system size.
156 * Verify that its last block can actually be accessed.
157 * Convert to file system fragment sized units.
160 printf("preposterous size %lld\n", (long long)fssize);
163 ffs_wtfs(fssize - 1, sectorsize, (char *)&sblock, fsopts);
166 * collect and verify the filesystem density info
168 sblock.fs_avgfilesize = avgfilesize;
169 sblock.fs_avgfpdir = avgfpdir;
170 if (sblock.fs_avgfilesize <= 0)
171 printf("illegal expected average file size %d\n",
172 sblock.fs_avgfilesize), exit(14);
173 if (sblock.fs_avgfpdir <= 0)
174 printf("illegal expected number of files per directory %d\n",
175 sblock.fs_avgfpdir), exit(15);
177 * collect and verify the block and fragment sizes
179 sblock.fs_bsize = bsize;
180 sblock.fs_fsize = fsize;
181 if (!POWEROF2(sblock.fs_bsize)) {
182 printf("block size must be a power of 2, not %d\n",
186 if (!POWEROF2(sblock.fs_fsize)) {
187 printf("fragment size must be a power of 2, not %d\n",
191 if (sblock.fs_fsize < sectorsize) {
192 printf("fragment size %d is too small, minimum is %d\n",
193 sblock.fs_fsize, sectorsize);
196 if (sblock.fs_bsize < MINBSIZE) {
197 printf("block size %d is too small, minimum is %d\n",
198 sblock.fs_bsize, MINBSIZE);
201 if (sblock.fs_bsize > FFS_MAXBSIZE) {
202 printf("block size %d is too large, maximum is %d\n",
203 sblock.fs_bsize, FFS_MAXBSIZE);
206 if (sblock.fs_bsize < sblock.fs_fsize) {
207 printf("block size (%d) cannot be smaller than fragment size (%d)\n",
208 sblock.fs_bsize, sblock.fs_fsize);
212 if (maxbsize < bsize || !POWEROF2(maxbsize)) {
213 sblock.fs_maxbsize = sblock.fs_bsize;
214 printf("Extent size set to %d\n", sblock.fs_maxbsize);
215 } else if (sblock.fs_maxbsize > FS_MAXCONTIG * sblock.fs_bsize) {
216 sblock.fs_maxbsize = FS_MAXCONTIG * sblock.fs_bsize;
217 printf("Extent size reduced to %d\n", sblock.fs_maxbsize);
219 sblock.fs_maxbsize = maxbsize;
221 sblock.fs_maxcontig = maxcontig;
222 if (sblock.fs_maxcontig < sblock.fs_maxbsize / sblock.fs_bsize) {
223 sblock.fs_maxcontig = sblock.fs_maxbsize / sblock.fs_bsize;
224 printf("Maxcontig raised to %d\n", sblock.fs_maxbsize);
227 if (sblock.fs_maxcontig > 1)
228 sblock.fs_contigsumsize = MIN(sblock.fs_maxcontig,FS_MAXCONTIG);
230 sblock.fs_bmask = ~(sblock.fs_bsize - 1);
231 sblock.fs_fmask = ~(sblock.fs_fsize - 1);
232 sblock.fs_qbmask = ~sblock.fs_bmask;
233 sblock.fs_qfmask = ~sblock.fs_fmask;
234 for (sblock.fs_bshift = 0, i = sblock.fs_bsize; i > 1; i >>= 1)
236 for (sblock.fs_fshift = 0, i = sblock.fs_fsize; i > 1; i >>= 1)
238 sblock.fs_frag = numfrags(&sblock, sblock.fs_bsize);
239 for (sblock.fs_fragshift = 0, i = sblock.fs_frag; i > 1; i >>= 1)
240 sblock.fs_fragshift++;
241 if (sblock.fs_frag > MAXFRAG) {
242 printf("fragment size %d is too small, "
243 "minimum with block size %d is %d\n",
244 sblock.fs_fsize, sblock.fs_bsize,
245 sblock.fs_bsize / MAXFRAG);
248 sblock.fs_fsbtodb = ilog2(sblock.fs_fsize / sectorsize);
249 sblock.fs_size = fssize = dbtofsb(&sblock, fssize);
252 sblock.fs_magic = FS_UFS1_MAGIC;
253 sblock.fs_sblockloc = SBLOCK_UFS1;
254 sblock.fs_nindir = sblock.fs_bsize / sizeof(int32_t);
255 sblock.fs_inopb = sblock.fs_bsize / sizeof(struct ufs1_dinode);
256 sblock.fs_maxsymlinklen = ((NDADDR + NIADDR) *
258 sblock.fs_old_inodefmt = FS_44INODEFMT;
259 sblock.fs_old_cgoffset = 0;
260 sblock.fs_old_cgmask = 0xffffffff;
261 sblock.fs_old_size = sblock.fs_size;
262 sblock.fs_old_rotdelay = 0;
263 sblock.fs_old_rps = 60;
264 sblock.fs_old_nspf = sblock.fs_fsize / sectorsize;
265 sblock.fs_old_cpg = 1;
266 sblock.fs_old_interleave = 1;
267 sblock.fs_old_trackskew = 0;
268 sblock.fs_old_cpc = 0;
269 sblock.fs_old_postblformat = 1;
270 sblock.fs_old_nrpos = 1;
272 sblock.fs_magic = FS_UFS2_MAGIC;
273 #if 0 /* XXX makefs is used for small filesystems. */
274 sblock.fs_sblockloc = SBLOCK_UFS2;
276 sblock.fs_sblockloc = SBLOCK_UFS1;
278 sblock.fs_nindir = sblock.fs_bsize / sizeof(int64_t);
279 sblock.fs_inopb = sblock.fs_bsize / sizeof(struct ufs2_dinode);
280 sblock.fs_maxsymlinklen = ((NDADDR + NIADDR) *
285 roundup(howmany(sblock.fs_sblockloc + SBLOCKSIZE, sblock.fs_fsize),
287 sblock.fs_cblkno = (daddr_t)(sblock.fs_sblkno +
288 roundup(howmany(SBLOCKSIZE, sblock.fs_fsize), sblock.fs_frag));
289 sblock.fs_iblkno = sblock.fs_cblkno + sblock.fs_frag;
290 sblock.fs_maxfilesize = sblock.fs_bsize * NDADDR - 1;
291 for (sizepb = sblock.fs_bsize, i = 0; i < NIADDR; i++) {
292 sizepb *= NINDIR(&sblock);
293 sblock.fs_maxfilesize += sizepb;
297 * Calculate the number of blocks to put into each cylinder group.
299 * This algorithm selects the number of blocks per cylinder
300 * group. The first goal is to have at least enough data blocks
301 * in each cylinder group to meet the density requirement. Once
302 * this goal is achieved we try to expand to have at least
303 * 1 cylinder group. Once this goal is achieved, we pack as
304 * many blocks into each cylinder group map as will fit.
306 * We start by calculating the smallest number of blocks that we
307 * can put into each cylinder group. If this is too big, we reduce
308 * the density until it fits.
310 origdensity = density;
312 fragsperinode = MAX(numfrags(&sblock, density), 1);
313 minfpg = fragsperinode * INOPB(&sblock);
314 if (minfpg > sblock.fs_size)
315 minfpg = sblock.fs_size;
316 sblock.fs_ipg = INOPB(&sblock);
317 sblock.fs_fpg = roundup(sblock.fs_iblkno +
318 sblock.fs_ipg / INOPF(&sblock), sblock.fs_frag);
319 if (sblock.fs_fpg < minfpg)
320 sblock.fs_fpg = minfpg;
321 sblock.fs_ipg = roundup(howmany(sblock.fs_fpg, fragsperinode),
323 sblock.fs_fpg = roundup(sblock.fs_iblkno +
324 sblock.fs_ipg / INOPF(&sblock), sblock.fs_frag);
325 if (sblock.fs_fpg < minfpg)
326 sblock.fs_fpg = minfpg;
327 sblock.fs_ipg = roundup(howmany(sblock.fs_fpg, fragsperinode),
329 if (CGSIZE(&sblock) < (unsigned long)sblock.fs_bsize)
331 density -= sblock.fs_fsize;
333 if (density != origdensity)
334 printf("density reduced from %d to %d\n", origdensity, density);
336 if (maxblkspercg <= 0 || maxblkspercg >= fssize)
337 maxblkspercg = fssize - 1;
339 * Start packing more blocks into the cylinder group until
340 * it cannot grow any larger, the number of cylinder groups
341 * drops below 1, or we reach the size requested.
343 for ( ; sblock.fs_fpg < maxblkspercg; sblock.fs_fpg += sblock.fs_frag) {
344 sblock.fs_ipg = roundup(howmany(sblock.fs_fpg, fragsperinode),
346 if (sblock.fs_size / sblock.fs_fpg < 1)
348 if (CGSIZE(&sblock) < (unsigned long)sblock.fs_bsize)
350 if (CGSIZE(&sblock) == (unsigned long)sblock.fs_bsize)
352 sblock.fs_fpg -= sblock.fs_frag;
353 sblock.fs_ipg = roundup(howmany(sblock.fs_fpg, fragsperinode),
358 * Check to be sure that the last cylinder group has enough blocks
359 * to be viable. If it is too small, reduce the number of blocks
360 * per cylinder group which will have the effect of moving more
361 * blocks into the last cylinder group.
363 optimalfpg = sblock.fs_fpg;
365 sblock.fs_ncg = howmany(sblock.fs_size, sblock.fs_fpg);
366 lastminfpg = roundup(sblock.fs_iblkno +
367 sblock.fs_ipg / INOPF(&sblock), sblock.fs_frag);
368 if (sblock.fs_size < lastminfpg) {
369 printf("Filesystem size %lld < minimum size of %d\n",
370 (long long)sblock.fs_size, lastminfpg);
373 if (sblock.fs_size % sblock.fs_fpg >= lastminfpg ||
374 sblock.fs_size % sblock.fs_fpg == 0)
376 sblock.fs_fpg -= sblock.fs_frag;
377 sblock.fs_ipg = roundup(howmany(sblock.fs_fpg, fragsperinode),
380 if (optimalfpg != sblock.fs_fpg)
381 printf("Reduced frags per cylinder group from %d to %d %s\n",
382 optimalfpg, sblock.fs_fpg, "to enlarge last cyl group");
383 sblock.fs_cgsize = fragroundup(&sblock, CGSIZE(&sblock));
384 sblock.fs_dblkno = sblock.fs_iblkno + sblock.fs_ipg / INOPF(&sblock);
386 sblock.fs_old_spc = sblock.fs_fpg * sblock.fs_old_nspf;
387 sblock.fs_old_nsect = sblock.fs_old_spc;
388 sblock.fs_old_npsect = sblock.fs_old_spc;
389 sblock.fs_old_ncyl = sblock.fs_ncg;
393 * fill in remaining fields of the super block
395 sblock.fs_csaddr = cgdmin(&sblock, 0);
397 fragroundup(&sblock, sblock.fs_ncg * sizeof(struct csum));
400 * Setup memory for temporary in-core cylgroup summaries.
401 * Cribbed from ffs_mountfs().
403 size = sblock.fs_cssize;
404 blks = howmany(size, sblock.fs_fsize);
405 if (sblock.fs_contigsumsize > 0)
406 size += sblock.fs_ncg * sizeof(int32_t);
407 if ((space = (char *)calloc(1, size)) == NULL)
408 err(1, "memory allocation error for cg summaries");
409 sblock.fs_csp = space;
410 space = (char *)space + sblock.fs_cssize;
411 if (sblock.fs_contigsumsize > 0) {
414 sblock.fs_maxcluster = lp = space;
415 for (i = 0; i < sblock.fs_ncg; i++)
416 *lp++ = sblock.fs_contigsumsize;
419 sblock.fs_sbsize = fragroundup(&sblock, sizeof(struct fs));
420 if (sblock.fs_sbsize > SBLOCKSIZE)
421 sblock.fs_sbsize = SBLOCKSIZE;
422 sblock.fs_minfree = minfree;
423 sblock.fs_maxcontig = maxcontig;
424 sblock.fs_maxbpg = maxbpg;
425 sblock.fs_optim = opt;
426 sblock.fs_cgrotor = 0;
427 sblock.fs_pendingblocks = 0;
428 sblock.fs_pendinginodes = 0;
429 sblock.fs_cstotal.cs_ndir = 0;
430 sblock.fs_cstotal.cs_nbfree = 0;
431 sblock.fs_cstotal.cs_nifree = 0;
432 sblock.fs_cstotal.cs_nffree = 0;
436 sblock.fs_clean = FS_ISCLEAN;
438 sblock.fs_id[0] = start_time.tv_sec;
439 sblock.fs_id[1] = random();
440 sblock.fs_fsmnt[0] = '\0';
441 csfrags = howmany(sblock.fs_cssize, sblock.fs_fsize);
442 sblock.fs_dsize = sblock.fs_size - sblock.fs_sblkno -
443 sblock.fs_ncg * (sblock.fs_dblkno - sblock.fs_sblkno);
444 sblock.fs_cstotal.cs_nbfree =
445 fragstoblks(&sblock, sblock.fs_dsize) -
446 howmany(csfrags, sblock.fs_frag);
447 sblock.fs_cstotal.cs_nffree =
448 fragnum(&sblock, sblock.fs_size) +
449 (fragnum(&sblock, csfrags) > 0 ?
450 sblock.fs_frag - fragnum(&sblock, csfrags) : 0);
451 sblock.fs_cstotal.cs_nifree = sblock.fs_ncg * sblock.fs_ipg - ROOTINO;
452 sblock.fs_cstotal.cs_ndir = 0;
453 sblock.fs_dsize -= csfrags;
454 sblock.fs_time = start_time.tv_sec;
456 sblock.fs_old_time = start_time.tv_sec;
457 sblock.fs_old_dsize = sblock.fs_dsize;
458 sblock.fs_old_csaddr = sblock.fs_csaddr;
459 sblock.fs_old_cstotal.cs_ndir = sblock.fs_cstotal.cs_ndir;
460 sblock.fs_old_cstotal.cs_nbfree = sblock.fs_cstotal.cs_nbfree;
461 sblock.fs_old_cstotal.cs_nifree = sblock.fs_cstotal.cs_nifree;
462 sblock.fs_old_cstotal.cs_nffree = sblock.fs_cstotal.cs_nffree;
465 * Dump out summary information about file system.
467 #define B2MBFACTOR (1 / (1024.0 * 1024.0))
468 printf("%s: %.1fMB (%lld sectors) block size %d, "
469 "fragment size %d\n",
470 fsys, (float)sblock.fs_size * sblock.fs_fsize * B2MBFACTOR,
471 (long long)fsbtodb(&sblock, sblock.fs_size),
472 sblock.fs_bsize, sblock.fs_fsize);
473 printf("\tusing %d cylinder groups of %.2fMB, %d blks, "
476 (float)sblock.fs_fpg * sblock.fs_fsize * B2MBFACTOR,
477 sblock.fs_fpg / sblock.fs_frag, sblock.fs_ipg);
480 * Now determine how wide each column will be, and calculate how
481 * many columns will fit in a 76 char line. 76 is the width of the
482 * subwindows in sysinst.
484 printcolwidth = count_digits(
485 fsbtodb(&sblock, cgsblock(&sblock, sblock.fs_ncg -1)));
486 nprintcols = 76 / (printcolwidth + 2);
489 * allocate space for superblock, cylinder group map, and
490 * two sets of inode blocks.
492 if (sblock.fs_bsize < SBLOCKSIZE)
493 iobufsize = SBLOCKSIZE + 3 * sblock.fs_bsize;
495 iobufsize = 4 * sblock.fs_bsize;
496 if ((iobuf = malloc(iobufsize)) == 0) {
497 printf("Cannot allocate I/O buffer\n");
500 memset(iobuf, 0, iobufsize);
502 * Make a copy of the superblock into the buffer that we will be
503 * writing out in each cylinder group.
505 memcpy(writebuf, &sblock, sbsize);
506 if (fsopts->needswap)
507 ffs_sb_swap(&sblock, (struct fs*)writebuf);
508 memcpy(iobuf, writebuf, SBLOCKSIZE);
510 printf("super-block backups (for fsck -b #) at:");
511 for (cylno = 0; cylno < sblock.fs_ncg; cylno++) {
512 initcg(cylno, start_time.tv_sec, fsopts);
513 if (cylno % nprintcols == 0)
515 printf(" %*lld,", printcolwidth,
516 (long long)fsbtodb(&sblock, cgsblock(&sblock, cylno)));
522 * Now construct the initial file system,
523 * then write out the super-block.
525 sblock.fs_time = start_time.tv_sec;
527 sblock.fs_old_cstotal.cs_ndir = sblock.fs_cstotal.cs_ndir;
528 sblock.fs_old_cstotal.cs_nbfree = sblock.fs_cstotal.cs_nbfree;
529 sblock.fs_old_cstotal.cs_nifree = sblock.fs_cstotal.cs_nifree;
530 sblock.fs_old_cstotal.cs_nffree = sblock.fs_cstotal.cs_nffree;
532 if (fsopts->needswap)
533 sblock.fs_flags |= FS_SWAPPED;
534 ffs_write_superblock(&sblock, fsopts);
539 * Write out the superblock and its duplicates,
540 * and the cylinder group summaries
543 ffs_write_superblock(struct fs *fs, const fsinfo_t *fsopts)
545 int cylno, size, blks, i, saveflag;
549 saveflag = fs->fs_flags & FS_INTERNAL;
550 fs->fs_flags &= ~FS_INTERNAL;
552 memcpy(writebuf, &sblock, sbsize);
553 if (fsopts->needswap)
554 ffs_sb_swap(fs, (struct fs*)writebuf);
555 ffs_wtfs(fs->fs_sblockloc / sectorsize, sbsize, writebuf, fsopts);
557 /* Write out the duplicate super blocks */
558 for (cylno = 0; cylno < fs->fs_ncg; cylno++)
559 ffs_wtfs(fsbtodb(fs, cgsblock(fs, cylno)),
560 sbsize, writebuf, fsopts);
562 /* Write out the cylinder group summaries */
563 size = fs->fs_cssize;
564 blks = howmany(size, fs->fs_fsize);
565 space = (void *)fs->fs_csp;
566 if ((wrbuf = malloc(size)) == NULL)
567 err(1, "ffs_write_superblock: malloc %d", size);
568 for (i = 0; i < blks; i+= fs->fs_frag) {
570 if (i + fs->fs_frag > blks)
571 size = (blks - i) * fs->fs_fsize;
572 if (fsopts->needswap)
573 ffs_csum_swap((struct csum *)space,
574 (struct csum *)wrbuf, size);
576 memcpy(wrbuf, space, (u_int)size);
577 ffs_wtfs(fsbtodb(fs, fs->fs_csaddr + i), size, wrbuf, fsopts);
578 space = (char *)space + size;
581 fs->fs_flags |= saveflag;
585 * Initialize a cylinder group.
588 initcg(int cylno, time_t utime, const fsinfo_t *fsopts)
591 int32_t i, j, d, dlower, dupper, blkno;
592 struct ufs1_dinode *dp1;
593 struct ufs2_dinode *dp2;
597 * Determine block bounds for cylinder group.
598 * Allow space for super block summary information in first
601 cbase = cgbase(&sblock, cylno);
602 dmax = cbase + sblock.fs_fpg;
603 if (dmax > sblock.fs_size)
604 dmax = sblock.fs_size;
605 dlower = cgsblock(&sblock, cylno) - cbase;
606 dupper = cgdmin(&sblock, cylno) - cbase;
608 dupper += howmany(sblock.fs_cssize, sblock.fs_fsize);
609 memset(&acg, 0, sblock.fs_cgsize);
611 acg.cg_magic = CG_MAGIC;
613 acg.cg_niblk = sblock.fs_ipg;
614 acg.cg_initediblk = sblock.fs_ipg < 2 * INOPB(&sblock) ?
615 sblock.fs_ipg : 2 * INOPB(&sblock);
616 acg.cg_ndblk = dmax - cbase;
617 if (sblock.fs_contigsumsize > 0)
618 acg.cg_nclusterblks = acg.cg_ndblk >> sblock.fs_fragshift;
619 start = &acg.cg_space[0] - (u_char *)(&acg.cg_firstfield);
621 acg.cg_iusedoff = start;
623 if (cylno == sblock.fs_ncg - 1)
624 acg.cg_old_ncyl = howmany(acg.cg_ndblk,
625 sblock.fs_fpg / sblock.fs_old_cpg);
627 acg.cg_old_ncyl = sblock.fs_old_cpg;
628 acg.cg_old_time = acg.cg_time;
630 acg.cg_old_niblk = acg.cg_niblk;
632 acg.cg_initediblk = 0;
633 acg.cg_old_btotoff = start;
634 acg.cg_old_boff = acg.cg_old_btotoff +
635 sblock.fs_old_cpg * sizeof(int32_t);
636 acg.cg_iusedoff = acg.cg_old_boff +
637 sblock.fs_old_cpg * sizeof(u_int16_t);
639 acg.cg_freeoff = acg.cg_iusedoff + howmany(sblock.fs_ipg, CHAR_BIT);
640 if (sblock.fs_contigsumsize <= 0) {
641 acg.cg_nextfreeoff = acg.cg_freeoff +
642 howmany(sblock.fs_fpg, CHAR_BIT);
644 acg.cg_clustersumoff = acg.cg_freeoff +
645 howmany(sblock.fs_fpg, CHAR_BIT) - sizeof(int32_t);
646 acg.cg_clustersumoff =
647 roundup(acg.cg_clustersumoff, sizeof(int32_t));
648 acg.cg_clusteroff = acg.cg_clustersumoff +
649 (sblock.fs_contigsumsize + 1) * sizeof(int32_t);
650 acg.cg_nextfreeoff = acg.cg_clusteroff +
651 howmany(fragstoblks(&sblock, sblock.fs_fpg), CHAR_BIT);
653 if (acg.cg_nextfreeoff > sblock.fs_cgsize) {
654 printf("Panic: cylinder group too big\n");
657 acg.cg_cs.cs_nifree += sblock.fs_ipg;
659 for (i = 0; i < ROOTINO; i++) {
660 setbit(cg_inosused_swap(&acg, 0), i);
661 acg.cg_cs.cs_nifree--;
665 * In cylno 0, beginning space is reserved
666 * for boot and super blocks.
668 for (d = 0, blkno = 0; d < dlower;) {
669 ffs_setblock(&sblock, cg_blksfree_swap(&acg, 0), blkno);
670 if (sblock.fs_contigsumsize > 0)
671 setbit(cg_clustersfree_swap(&acg, 0), blkno);
672 acg.cg_cs.cs_nbfree++;
677 if ((i = (dupper & (sblock.fs_frag - 1))) != 0) {
678 acg.cg_frsum[sblock.fs_frag - i]++;
679 for (d = dupper + sblock.fs_frag - i; dupper < d; dupper++) {
680 setbit(cg_blksfree_swap(&acg, 0), dupper);
681 acg.cg_cs.cs_nffree++;
684 for (d = dupper, blkno = dupper >> sblock.fs_fragshift;
685 d + sblock.fs_frag <= acg.cg_ndblk; ) {
686 ffs_setblock(&sblock, cg_blksfree_swap(&acg, 0), blkno);
687 if (sblock.fs_contigsumsize > 0)
688 setbit(cg_clustersfree_swap(&acg, 0), blkno);
689 acg.cg_cs.cs_nbfree++;
693 if (d < acg.cg_ndblk) {
694 acg.cg_frsum[acg.cg_ndblk - d]++;
695 for (; d < acg.cg_ndblk; d++) {
696 setbit(cg_blksfree_swap(&acg, 0), d);
697 acg.cg_cs.cs_nffree++;
700 if (sblock.fs_contigsumsize > 0) {
701 int32_t *sump = cg_clustersum_swap(&acg, 0);
702 u_char *mapp = cg_clustersfree_swap(&acg, 0);
707 for (i = 0; i < acg.cg_nclusterblks; i++) {
708 if ((map & bit) != 0) {
710 } else if (run != 0) {
711 if (run > sblock.fs_contigsumsize)
712 run = sblock.fs_contigsumsize;
716 if ((i & (CHAR_BIT - 1)) != (CHAR_BIT - 1)) {
724 if (run > sblock.fs_contigsumsize)
725 run = sblock.fs_contigsumsize;
729 sblock.fs_cs(&sblock, cylno) = acg.cg_cs;
731 * Write out the duplicate super block, the cylinder group map
732 * and two blocks worth of inodes in a single write.
734 start = sblock.fs_bsize > SBLOCKSIZE ? sblock.fs_bsize : SBLOCKSIZE;
735 memcpy(&iobuf[start], &acg, sblock.fs_cgsize);
736 if (fsopts->needswap)
737 ffs_cg_swap(&acg, (struct cg*)&iobuf[start], &sblock);
738 start += sblock.fs_bsize;
739 dp1 = (struct ufs1_dinode *)(&iobuf[start]);
740 dp2 = (struct ufs2_dinode *)(&iobuf[start]);
741 for (i = 0; i < acg.cg_initediblk; i++) {
742 if (sblock.fs_magic == FS_UFS1_MAGIC) {
743 /* No need to swap, it'll stay random */
744 dp1->di_gen = random();
747 dp2->di_gen = random();
751 ffs_wtfs(fsbtodb(&sblock, cgsblock(&sblock, cylno)), iobufsize, iobuf,
754 * For the old file system, we have to initialize all the inodes.
757 for (i = 2 * sblock.fs_frag;
758 i < sblock.fs_ipg / INOPF(&sblock);
759 i += sblock.fs_frag) {
760 dp1 = (struct ufs1_dinode *)(&iobuf[start]);
761 for (j = 0; j < INOPB(&sblock); j++) {
762 dp1->di_gen = random();
765 ffs_wtfs(fsbtodb(&sblock, cgimin(&sblock, cylno) + i),
766 sblock.fs_bsize, &iobuf[start], fsopts);
772 * read a block from the file system
775 ffs_rdfs(daddr_t bno, int size, void *bf, const fsinfo_t *fsopts)
781 offset *= fsopts->sectorsize;
782 if (lseek(fsopts->fd, offset, SEEK_SET) < 0)
783 err(1, "ffs_rdfs: seek error for sector %lld: %s\n",
784 (long long)bno, strerror(errno));
785 n = read(fsopts->fd, bf, size);
788 err(1, "ffs_rdfs: read error bno %lld size %d", (long long)bno,
792 errx(1, "ffs_rdfs: read error for sector %lld: %s\n",
793 (long long)bno, strerror(errno));
797 * write a block to the file system
800 ffs_wtfs(daddr_t bno, int size, void *bf, const fsinfo_t *fsopts)
806 offset *= fsopts->sectorsize;
807 if (lseek(fsopts->fd, offset, SEEK_SET) < 0)
808 err(1, "wtfs: seek error for sector %lld: %s\n",
809 (long long)bno, strerror(errno));
810 n = write(fsopts->fd, bf, size);
812 err(1, "wtfs: write error for sector %lld: %s\n",
813 (long long)bno, strerror(errno));
815 errx(1, "wtfs: write error for sector %lld: %s\n",
816 (long long)bno, strerror(errno));
820 /* Determine how many digits are needed to print a given integer */
822 count_digits(int num)
826 for(ndig = 1; num > 9; num /=10, ndig++);
836 for (n = 0; n < sizeof(n) * CHAR_BIT; n++)
839 errx(1, "ilog2: %d is not a power of 2\n", val);