2 * SPDX-License-Identifier: BSD-3-Clause
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
43 static char sccsid[] = "@(#)mkfs.c 8.11 (Berkeley) 5/3/95";
46 #include <sys/cdefs.h>
47 __FBSDID("$FreeBSD$");
49 #define IN_RTLD /* So we pickup the P_OSREL defines */
50 #include <sys/param.h>
51 #include <sys/disklabel.h>
53 #include <sys/ioctl.h>
55 #include <sys/resource.h>
68 #include <ufs/ufs/dinode.h>
69 #include <ufs/ufs/dir.h>
70 #include <ufs/ffs/fs.h>
74 * make file system for cylinder-group style file systems
77 #define POWEROF2(num) (((num) & ((num) - 1)) == 0)
79 static struct csum *fscs;
80 #define sblock disk.d_fs
84 struct ufs1_dinode dp1;
85 struct ufs2_dinode dp2;
87 #define DIP(dp, field) \
88 ((sblock.fs_magic == FS_UFS1_MAGIC) ? \
89 (dp)->dp1.field : (dp)->dp2.field)
92 static long iobufsize;
93 static ufs2_daddr_t alloc(int size, int mode);
94 static int charsperline(void);
95 static void clrblock(struct fs *, unsigned char *, int);
96 static void fsinit(time_t);
97 static int ilog2(int);
98 static void initcg(int, time_t);
99 static int isblock(struct fs *, unsigned char *, int);
100 static void iput(union dinode *, ino_t);
101 static int makedir(struct direct *, int);
102 static void setblock(struct fs *, unsigned char *, int);
103 static void wtfs(ufs2_daddr_t, int, char *);
104 static u_int32_t newfs_random(void);
107 mkfs(struct partition *pp, char *fsys)
109 int fragsperinode, optimalfpg, origdensity, minfpg, lastminfpg;
116 int minfragsperinode; /* minimum ratio of frags to inodes */
117 char tmpbuf[100]; /* XXX this will break in about 2,500 years */
118 struct fsrecovery *fsr;
122 char cdummy[SBLOCKSIZE];
124 #define fsdummy dummy.fdummy
125 #define chdummy dummy.cdummy
128 * Our blocks == sector size, and the version of UFS we are using is
129 * specified by Oflag.
131 disk.d_bsize = sectorsize;
137 if ((sblock.fs_si = malloc(sizeof(struct fs_summary_info))) == NULL) {
138 printf("Superblock summary info allocation failed.\n");
141 sblock.fs_old_flags = FS_FLAGS_UPDATED;
144 sblock.fs_flags |= FS_DOSOFTDEP;
146 strlcpy(sblock.fs_volname, volumelabel, MAXVOLLEN);
148 sblock.fs_flags |= FS_GJOURNAL;
150 sblock.fs_flags |= FS_MULTILABEL;
152 sblock.fs_flags |= FS_TRIM;
154 * Validate the given file system size.
155 * Verify that its last block can actually be accessed.
156 * Convert to file system fragment sized units.
159 printf("preposterous size %jd\n", (intmax_t)fssize);
162 wtfs(fssize - (realsectorsize / DEV_BSIZE), realsectorsize,
165 * collect and verify the file system density info
167 sblock.fs_avgfilesize = avgfilesize;
168 sblock.fs_avgfpdir = avgfilesperdir;
169 if (sblock.fs_avgfilesize <= 0)
170 printf("illegal expected average file size %d\n",
171 sblock.fs_avgfilesize), exit(14);
172 if (sblock.fs_avgfpdir <= 0)
173 printf("illegal expected number of files per directory %d\n",
174 sblock.fs_avgfpdir), exit(15);
178 * collect and verify the block and fragment sizes
180 sblock.fs_bsize = bsize;
181 sblock.fs_fsize = fsize;
182 if (!POWEROF2(sblock.fs_bsize)) {
183 printf("block size must be a power of 2, not %d\n",
187 if (!POWEROF2(sblock.fs_fsize)) {
188 printf("fragment size must be a power of 2, not %d\n",
192 if (sblock.fs_fsize < sectorsize) {
193 printf("increasing fragment size from %d to sector size (%d)\n",
194 sblock.fs_fsize, sectorsize);
195 sblock.fs_fsize = sectorsize;
197 if (sblock.fs_bsize > MAXBSIZE) {
198 printf("decreasing block size from %d to maximum (%d)\n",
199 sblock.fs_bsize, MAXBSIZE);
200 sblock.fs_bsize = MAXBSIZE;
202 if (sblock.fs_bsize < MINBSIZE) {
203 printf("increasing block size from %d to minimum (%d)\n",
204 sblock.fs_bsize, MINBSIZE);
205 sblock.fs_bsize = MINBSIZE;
207 if (sblock.fs_fsize > MAXBSIZE) {
208 printf("decreasing fragment size from %d to maximum (%d)\n",
209 sblock.fs_fsize, MAXBSIZE);
210 sblock.fs_fsize = MAXBSIZE;
212 if (sblock.fs_bsize < sblock.fs_fsize) {
213 printf("increasing block size from %d to fragment size (%d)\n",
214 sblock.fs_bsize, sblock.fs_fsize);
215 sblock.fs_bsize = sblock.fs_fsize;
217 if (sblock.fs_fsize * MAXFRAG < sblock.fs_bsize) {
219 "increasing fragment size from %d to block size / %d (%d)\n",
220 sblock.fs_fsize, MAXFRAG, sblock.fs_bsize / MAXFRAG);
221 sblock.fs_fsize = sblock.fs_bsize / MAXFRAG;
225 if (maxbsize < bsize || !POWEROF2(maxbsize)) {
226 sblock.fs_maxbsize = sblock.fs_bsize;
227 printf("Extent size set to %d\n", sblock.fs_maxbsize);
228 } else if (maxbsize > FS_MAXCONTIG * sblock.fs_bsize) {
229 sblock.fs_maxbsize = FS_MAXCONTIG * sblock.fs_bsize;
230 printf("Extent size reduced to %d\n", sblock.fs_maxbsize);
232 sblock.fs_maxbsize = maxbsize;
235 * Maxcontig sets the default for the maximum number of blocks
236 * that may be allocated sequentially. With file system clustering
237 * it is possible to allocate contiguous blocks up to the maximum
238 * transfer size permitted by the controller or buffering.
241 maxcontig = MAX(1, MAXPHYS / bsize);
242 sblock.fs_maxcontig = maxcontig;
243 if (sblock.fs_maxcontig < sblock.fs_maxbsize / sblock.fs_bsize) {
244 sblock.fs_maxcontig = sblock.fs_maxbsize / sblock.fs_bsize;
245 printf("Maxcontig raised to %d\n", sblock.fs_maxbsize);
247 if (sblock.fs_maxcontig > 1)
248 sblock.fs_contigsumsize = MIN(sblock.fs_maxcontig,FS_MAXCONTIG);
249 sblock.fs_bmask = ~(sblock.fs_bsize - 1);
250 sblock.fs_fmask = ~(sblock.fs_fsize - 1);
251 sblock.fs_qbmask = ~sblock.fs_bmask;
252 sblock.fs_qfmask = ~sblock.fs_fmask;
253 sblock.fs_bshift = ilog2(sblock.fs_bsize);
254 sblock.fs_fshift = ilog2(sblock.fs_fsize);
255 sblock.fs_frag = numfrags(&sblock, sblock.fs_bsize);
256 sblock.fs_fragshift = ilog2(sblock.fs_frag);
257 if (sblock.fs_frag > MAXFRAG) {
258 printf("fragment size %d is still too small (can't happen)\n",
259 sblock.fs_bsize / MAXFRAG);
262 sblock.fs_fsbtodb = ilog2(sblock.fs_fsize / sectorsize);
263 sblock.fs_size = fssize = dbtofsb(&sblock, fssize);
264 sblock.fs_providersize = dbtofsb(&sblock, mediasize / sectorsize);
267 * Before the filesystem is finally initialized, mark it
268 * as incompletely initialized.
270 sblock.fs_magic = FS_BAD_MAGIC;
273 sblock.fs_sblockloc = SBLOCK_UFS1;
274 sblock.fs_sblockactualloc = SBLOCK_UFS1;
275 sblock.fs_nindir = sblock.fs_bsize / sizeof(ufs1_daddr_t);
276 sblock.fs_inopb = sblock.fs_bsize / sizeof(struct ufs1_dinode);
277 sblock.fs_maxsymlinklen = ((UFS_NDADDR + UFS_NIADDR) *
278 sizeof(ufs1_daddr_t));
279 sblock.fs_old_inodefmt = FS_44INODEFMT;
280 sblock.fs_old_cgoffset = 0;
281 sblock.fs_old_cgmask = 0xffffffff;
282 sblock.fs_old_size = sblock.fs_size;
283 sblock.fs_old_rotdelay = 0;
284 sblock.fs_old_rps = 60;
285 sblock.fs_old_nspf = sblock.fs_fsize / sectorsize;
286 sblock.fs_old_cpg = 1;
287 sblock.fs_old_interleave = 1;
288 sblock.fs_old_trackskew = 0;
289 sblock.fs_old_cpc = 0;
290 sblock.fs_old_postblformat = 1;
291 sblock.fs_old_nrpos = 1;
293 sblock.fs_sblockloc = SBLOCK_UFS2;
294 sblock.fs_sblockactualloc = SBLOCK_UFS2;
295 sblock.fs_nindir = sblock.fs_bsize / sizeof(ufs2_daddr_t);
296 sblock.fs_inopb = sblock.fs_bsize / sizeof(struct ufs2_dinode);
297 sblock.fs_maxsymlinklen = ((UFS_NDADDR + UFS_NIADDR) *
298 sizeof(ufs2_daddr_t));
301 roundup(howmany(sblock.fs_sblockloc + SBLOCKSIZE, sblock.fs_fsize),
303 sblock.fs_cblkno = sblock.fs_sblkno +
304 roundup(howmany(SBLOCKSIZE, sblock.fs_fsize), sblock.fs_frag);
305 sblock.fs_iblkno = sblock.fs_cblkno + sblock.fs_frag;
306 sblock.fs_maxfilesize = sblock.fs_bsize * UFS_NDADDR - 1;
307 for (sizepb = sblock.fs_bsize, i = 0; i < UFS_NIADDR; i++) {
308 sizepb *= NINDIR(&sblock);
309 sblock.fs_maxfilesize += sizepb;
313 * It's impossible to create a snapshot in case that fs_maxfilesize
314 * is smaller than the fssize.
316 if (sblock.fs_maxfilesize < (u_quad_t)fssize) {
317 warnx("WARNING: You will be unable to create snapshots on this "
318 "file system. Correct by using a larger blocksize.");
322 * Calculate the number of blocks to put into each cylinder group.
324 * This algorithm selects the number of blocks per cylinder
325 * group. The first goal is to have at least enough data blocks
326 * in each cylinder group to meet the density requirement. Once
327 * this goal is achieved we try to expand to have at least
328 * MINCYLGRPS cylinder groups. Once this goal is achieved, we
329 * pack as many blocks into each cylinder group map as will fit.
331 * We start by calculating the smallest number of blocks that we
332 * can put into each cylinder group. If this is too big, we reduce
333 * the density until it fits.
335 maxinum = (((int64_t)(1)) << 32) - INOPB(&sblock);
336 minfragsperinode = 1 + fssize / maxinum;
338 density = MAX(NFPI, minfragsperinode) * fsize;
339 } else if (density < minfragsperinode * fsize) {
340 origdensity = density;
341 density = minfragsperinode * fsize;
342 fprintf(stderr, "density increased from %d to %d\n",
343 origdensity, density);
345 origdensity = density;
347 fragsperinode = MAX(numfrags(&sblock, density), 1);
348 if (fragsperinode < minfragsperinode) {
351 printf("Block size too small for a file system %s %d\n",
352 "of this size. Increasing blocksize to", bsize);
355 minfpg = fragsperinode * INOPB(&sblock);
356 if (minfpg > sblock.fs_size)
357 minfpg = sblock.fs_size;
358 sblock.fs_ipg = INOPB(&sblock);
359 sblock.fs_fpg = roundup(sblock.fs_iblkno +
360 sblock.fs_ipg / INOPF(&sblock), sblock.fs_frag);
361 if (sblock.fs_fpg < minfpg)
362 sblock.fs_fpg = minfpg;
363 sblock.fs_ipg = roundup(howmany(sblock.fs_fpg, fragsperinode),
365 sblock.fs_fpg = roundup(sblock.fs_iblkno +
366 sblock.fs_ipg / INOPF(&sblock), sblock.fs_frag);
367 if (sblock.fs_fpg < minfpg)
368 sblock.fs_fpg = minfpg;
369 sblock.fs_ipg = roundup(howmany(sblock.fs_fpg, fragsperinode),
371 if (CGSIZE(&sblock) < (unsigned long)sblock.fs_bsize)
373 density -= sblock.fs_fsize;
375 if (density != origdensity)
376 printf("density reduced from %d to %d\n", origdensity, density);
378 * Start packing more blocks into the cylinder group until
379 * it cannot grow any larger, the number of cylinder groups
380 * drops below MINCYLGRPS, or we reach the size requested.
381 * For UFS1 inodes per cylinder group are stored in an int16_t
382 * so fs_ipg is limited to 2^15 - 1.
384 for ( ; sblock.fs_fpg < maxblkspercg; sblock.fs_fpg += sblock.fs_frag) {
385 sblock.fs_ipg = roundup(howmany(sblock.fs_fpg, fragsperinode),
387 if (Oflag > 1 || (Oflag == 1 && sblock.fs_ipg <= 0x7fff)) {
388 if (sblock.fs_size / sblock.fs_fpg < MINCYLGRPS)
390 if (CGSIZE(&sblock) < (unsigned long)sblock.fs_bsize)
392 if (CGSIZE(&sblock) == (unsigned long)sblock.fs_bsize)
395 sblock.fs_fpg -= sblock.fs_frag;
396 sblock.fs_ipg = roundup(howmany(sblock.fs_fpg, fragsperinode),
401 * Check to be sure that the last cylinder group has enough blocks
402 * to be viable. If it is too small, reduce the number of blocks
403 * per cylinder group which will have the effect of moving more
404 * blocks into the last cylinder group.
406 optimalfpg = sblock.fs_fpg;
408 sblock.fs_ncg = howmany(sblock.fs_size, sblock.fs_fpg);
409 lastminfpg = roundup(sblock.fs_iblkno +
410 sblock.fs_ipg / INOPF(&sblock), sblock.fs_frag);
411 if (sblock.fs_size < lastminfpg) {
412 printf("Filesystem size %jd < minimum size of %d\n",
413 (intmax_t)sblock.fs_size, lastminfpg);
416 if (sblock.fs_size % sblock.fs_fpg >= lastminfpg ||
417 sblock.fs_size % sblock.fs_fpg == 0)
419 sblock.fs_fpg -= sblock.fs_frag;
420 sblock.fs_ipg = roundup(howmany(sblock.fs_fpg, fragsperinode),
423 if (optimalfpg != sblock.fs_fpg)
424 printf("Reduced frags per cylinder group from %d to %d %s\n",
425 optimalfpg, sblock.fs_fpg, "to enlarge last cyl group");
426 sblock.fs_cgsize = fragroundup(&sblock, CGSIZE(&sblock));
427 sblock.fs_dblkno = sblock.fs_iblkno + sblock.fs_ipg / INOPF(&sblock);
429 sblock.fs_old_spc = sblock.fs_fpg * sblock.fs_old_nspf;
430 sblock.fs_old_nsect = sblock.fs_old_spc;
431 sblock.fs_old_npsect = sblock.fs_old_spc;
432 sblock.fs_old_ncyl = sblock.fs_ncg;
435 * fill in remaining fields of the super block
437 sblock.fs_csaddr = cgdmin(&sblock, 0);
439 fragroundup(&sblock, sblock.fs_ncg * sizeof(struct csum));
440 fscs = (struct csum *)calloc(1, sblock.fs_cssize);
442 errx(31, "calloc failed");
443 sblock.fs_sbsize = fragroundup(&sblock, sizeof(struct fs));
444 if (sblock.fs_sbsize > SBLOCKSIZE)
445 sblock.fs_sbsize = SBLOCKSIZE;
446 if (sblock.fs_sbsize < realsectorsize)
447 sblock.fs_sbsize = realsectorsize;
448 sblock.fs_minfree = minfree;
449 if (metaspace > 0 && metaspace < sblock.fs_fpg / 2)
450 sblock.fs_metaspace = blknum(&sblock, metaspace);
451 else if (metaspace != -1)
452 /* reserve half of minfree for metadata blocks */
453 sblock.fs_metaspace = blknum(&sblock,
454 (sblock.fs_fpg * minfree) / 200);
456 sblock.fs_maxbpg = MAXBLKPG(sblock.fs_bsize);
458 sblock.fs_maxbpg = maxbpg;
459 sblock.fs_optim = opt;
460 sblock.fs_cgrotor = 0;
461 sblock.fs_pendingblocks = 0;
462 sblock.fs_pendinginodes = 0;
467 sblock.fs_id[0] = (long)utime;
468 sblock.fs_id[1] = newfs_random();
469 sblock.fs_fsmnt[0] = '\0';
470 csfrags = howmany(sblock.fs_cssize, sblock.fs_fsize);
471 sblock.fs_dsize = sblock.fs_size - sblock.fs_sblkno -
472 sblock.fs_ncg * (sblock.fs_dblkno - sblock.fs_sblkno);
473 sblock.fs_cstotal.cs_nbfree =
474 fragstoblks(&sblock, sblock.fs_dsize) -
475 howmany(csfrags, sblock.fs_frag);
476 sblock.fs_cstotal.cs_nffree =
477 fragnum(&sblock, sblock.fs_size) +
478 (fragnum(&sblock, csfrags) > 0 ?
479 sblock.fs_frag - fragnum(&sblock, csfrags) : 0);
480 sblock.fs_cstotal.cs_nifree =
481 sblock.fs_ncg * sblock.fs_ipg - UFS_ROOTINO;
482 sblock.fs_cstotal.cs_ndir = 0;
483 sblock.fs_dsize -= csfrags;
484 sblock.fs_time = utime;
486 sblock.fs_old_time = utime;
487 sblock.fs_old_dsize = sblock.fs_dsize;
488 sblock.fs_old_csaddr = sblock.fs_csaddr;
489 sblock.fs_old_cstotal.cs_ndir = sblock.fs_cstotal.cs_ndir;
490 sblock.fs_old_cstotal.cs_nbfree = sblock.fs_cstotal.cs_nbfree;
491 sblock.fs_old_cstotal.cs_nifree = sblock.fs_cstotal.cs_nifree;
492 sblock.fs_old_cstotal.cs_nffree = sblock.fs_cstotal.cs_nffree;
495 * Set flags for metadata that is being check-hashed.
497 * Metadata check hashes are not supported in the UFS version 1
498 * filesystem to keep it as small and simple as possible.
501 sblock.fs_flags |= FS_METACKHASH;
502 if (getosreldate() >= P_OSREL_CK_CYLGRP)
503 sblock.fs_metackhash |= CK_CYLGRP;
504 if (getosreldate() >= P_OSREL_CK_SUPERBLOCK)
505 sblock.fs_metackhash |= CK_SUPERBLOCK;
506 if (getosreldate() >= P_OSREL_CK_INODE)
507 sblock.fs_metackhash |= CK_INODE;
511 * Dump out summary information about file system.
513 # define B2MBFACTOR (1 / (1024.0 * 1024.0))
514 printf("%s: %.1fMB (%jd sectors) block size %d, fragment size %d\n",
515 fsys, (float)sblock.fs_size * sblock.fs_fsize * B2MBFACTOR,
516 (intmax_t)fsbtodb(&sblock, sblock.fs_size), sblock.fs_bsize,
518 printf("\tusing %d cylinder groups of %.2fMB, %d blks, %d inodes.\n",
519 sblock.fs_ncg, (float)sblock.fs_fpg * sblock.fs_fsize * B2MBFACTOR,
520 sblock.fs_fpg / sblock.fs_frag, sblock.fs_ipg);
521 if (sblock.fs_flags & FS_DOSOFTDEP)
522 printf("\twith soft updates\n");
525 if (Eflag && !Nflag) {
526 printf("Erasing sectors [%jd...%jd]\n",
527 sblock.fs_sblockloc / disk.d_bsize,
528 fsbtodb(&sblock, sblock.fs_size) - 1);
529 berase(&disk, sblock.fs_sblockloc / disk.d_bsize,
530 sblock.fs_size * sblock.fs_fsize - sblock.fs_sblockloc);
533 * Wipe out old UFS1 superblock(s) if necessary.
535 if (!Nflag && Oflag != 1 && realsectorsize <= SBLOCK_UFS1) {
536 i = bread(&disk, part_ofs + SBLOCK_UFS1 / disk.d_bsize, chdummy,
539 err(1, "can't read old UFS1 superblock: %s",
542 if (fsdummy.fs_magic == FS_UFS1_MAGIC) {
543 fsdummy.fs_magic = 0;
544 bwrite(&disk, part_ofs + SBLOCK_UFS1 / disk.d_bsize,
545 chdummy, SBLOCKSIZE);
546 for (cg = 0; cg < fsdummy.fs_ncg; cg++) {
547 if (fsbtodb(&fsdummy, cgsblock(&fsdummy, cg)) >
550 bwrite(&disk, part_ofs + fsbtodb(&fsdummy,
551 cgsblock(&fsdummy, cg)), chdummy, SBLOCKSIZE);
556 * Reference the summary information so it will also be written.
558 sblock.fs_csp = fscs;
559 if (!Nflag && sbwrite(&disk, 0) != 0)
560 err(1, "sbwrite: %s", disk.d_error);
562 printf("** Exiting on Xflag 1\n");
566 printf("** Leaving BAD MAGIC on Xflag 2\n");
568 sblock.fs_magic = (Oflag != 1) ? FS_UFS2_MAGIC : FS_UFS1_MAGIC;
571 * Now build the cylinders group blocks and
572 * then print out indices of cylinder groups.
574 printf("super-block backups (for fsck_ffs -b #) at:\n");
576 width = charsperline();
578 * Allocate space for two sets of inode blocks.
580 iobufsize = 2 * sblock.fs_bsize;
581 if ((iobuf = calloc(1, iobufsize)) == 0) {
582 printf("Cannot allocate I/O buffer\n");
586 * Write out all the cylinder groups and backup superblocks.
588 for (cg = 0; cg < sblock.fs_ncg; cg++) {
591 j = snprintf(tmpbuf, sizeof(tmpbuf), " %jd%s",
592 (intmax_t)fsbtodb(&sblock, cgsblock(&sblock, cg)),
593 cg < (sblock.fs_ncg-1) ? "," : "");
595 tmpbuf[j = 0] = '\0';
596 if (i + j >= width) {
601 printf("%s", tmpbuf);
608 * Now construct the initial file system,
609 * then write out the super-block.
613 sblock.fs_old_cstotal.cs_ndir = sblock.fs_cstotal.cs_ndir;
614 sblock.fs_old_cstotal.cs_nbfree = sblock.fs_cstotal.cs_nbfree;
615 sblock.fs_old_cstotal.cs_nifree = sblock.fs_cstotal.cs_nifree;
616 sblock.fs_old_cstotal.cs_nffree = sblock.fs_cstotal.cs_nffree;
619 printf("** Exiting on Xflag 3\n");
622 if (sbwrite(&disk, 0) != 0)
623 err(1, "sbwrite: %s", disk.d_error);
625 * For UFS1 filesystems with a blocksize of 64K, the first
626 * alternate superblock resides at the location used for
627 * the default UFS2 superblock. As there is a valid
628 * superblock at this location, the boot code will use
629 * it as its first choice. Thus we have to ensure that
630 * all of its statistcs on usage are correct.
632 if (Oflag == 1 && sblock.fs_bsize == 65536)
633 wtfs(fsbtodb(&sblock, cgsblock(&sblock, 0)),
634 sblock.fs_bsize, (char *)&sblock);
636 * Read the last sector of the boot block, replace the last
637 * 20 bytes with the recovery information, then write it back.
638 * The recovery information only works for UFS2 filesystems.
639 * For UFS1, zero out the area to ensure that an old UFS2
640 * recovery block is not accidentally found.
642 if ((fsrbuf = malloc(realsectorsize)) == NULL || bread(&disk,
643 part_ofs + (SBLOCK_UFS2 - realsectorsize) / disk.d_bsize,
644 fsrbuf, realsectorsize) == -1)
645 err(1, "can't read recovery area: %s", disk.d_error);
646 fsr = (struct fsrecovery *)&fsrbuf[realsectorsize - sizeof *fsr];
647 if (sblock.fs_magic != FS_UFS2_MAGIC) {
648 memset(fsr, 0, sizeof *fsr);
650 fsr->fsr_magic = sblock.fs_magic;
651 fsr->fsr_fpg = sblock.fs_fpg;
652 fsr->fsr_fsbtodb = sblock.fs_fsbtodb;
653 fsr->fsr_sblkno = sblock.fs_sblkno;
654 fsr->fsr_ncg = sblock.fs_ncg;
656 wtfs((SBLOCK_UFS2 - realsectorsize) / disk.d_bsize,
657 realsectorsize, fsrbuf);
660 * Update information about this partition in pack
661 * label, to that it may be updated on disk.
664 pp->p_fstype = FS_BSDFFS;
665 pp->p_fsize = sblock.fs_fsize;
666 pp->p_frag = sblock.fs_frag;
667 pp->p_cpg = sblock.fs_fpg;
672 * Initialize a cylinder group.
675 initcg(int cylno, time_t utime)
678 off_t savedactualloc;
679 uint i, j, d, dlower, dupper;
680 ufs2_daddr_t cbase, dmax;
681 struct ufs1_dinode *dp1;
682 struct ufs2_dinode *dp2;
686 * Determine block bounds for cylinder group.
687 * Allow space for super block summary information in first
690 cbase = cgbase(&sblock, cylno);
691 dmax = cbase + sblock.fs_fpg;
692 if (dmax > sblock.fs_size)
693 dmax = sblock.fs_size;
694 dlower = cgsblock(&sblock, cylno) - cbase;
695 dupper = cgdmin(&sblock, cylno) - cbase;
697 dupper += howmany(sblock.fs_cssize, sblock.fs_fsize);
699 memset(&acg, 0, sblock.fs_cgsize);
701 acg.cg_magic = CG_MAGIC;
703 acg.cg_niblk = sblock.fs_ipg;
704 acg.cg_initediblk = MIN(sblock.fs_ipg, 2 * INOPB(&sblock));
705 acg.cg_ndblk = dmax - cbase;
706 if (sblock.fs_contigsumsize > 0)
707 acg.cg_nclusterblks = acg.cg_ndblk / sblock.fs_frag;
708 start = &acg.cg_space[0] - (u_char *)(&acg.cg_firstfield);
710 acg.cg_iusedoff = start;
712 acg.cg_old_ncyl = sblock.fs_old_cpg;
713 acg.cg_old_time = acg.cg_time;
715 acg.cg_old_niblk = acg.cg_niblk;
717 acg.cg_initediblk = 0;
718 acg.cg_old_btotoff = start;
719 acg.cg_old_boff = acg.cg_old_btotoff +
720 sblock.fs_old_cpg * sizeof(int32_t);
721 acg.cg_iusedoff = acg.cg_old_boff +
722 sblock.fs_old_cpg * sizeof(u_int16_t);
724 acg.cg_freeoff = acg.cg_iusedoff + howmany(sblock.fs_ipg, CHAR_BIT);
725 acg.cg_nextfreeoff = acg.cg_freeoff + howmany(sblock.fs_fpg, CHAR_BIT);
726 if (sblock.fs_contigsumsize > 0) {
727 acg.cg_clustersumoff =
728 roundup(acg.cg_nextfreeoff, sizeof(u_int32_t));
729 acg.cg_clustersumoff -= sizeof(u_int32_t);
730 acg.cg_clusteroff = acg.cg_clustersumoff +
731 (sblock.fs_contigsumsize + 1) * sizeof(u_int32_t);
732 acg.cg_nextfreeoff = acg.cg_clusteroff +
733 howmany(fragstoblks(&sblock, sblock.fs_fpg), CHAR_BIT);
735 if (acg.cg_nextfreeoff > (unsigned)sblock.fs_cgsize) {
736 printf("Panic: cylinder group too big\n");
739 acg.cg_cs.cs_nifree += sblock.fs_ipg;
741 for (i = 0; i < (long)UFS_ROOTINO; i++) {
742 setbit(cg_inosused(&acg), i);
743 acg.cg_cs.cs_nifree--;
747 * In cylno 0, beginning space is reserved
748 * for boot and super blocks.
750 for (d = 0; d < dlower; d += sblock.fs_frag) {
751 blkno = d / sblock.fs_frag;
752 setblock(&sblock, cg_blksfree(&acg), blkno);
753 if (sblock.fs_contigsumsize > 0)
754 setbit(cg_clustersfree(&acg), blkno);
755 acg.cg_cs.cs_nbfree++;
758 if ((i = dupper % sblock.fs_frag)) {
759 acg.cg_frsum[sblock.fs_frag - i]++;
760 for (d = dupper + sblock.fs_frag - i; dupper < d; dupper++) {
761 setbit(cg_blksfree(&acg), dupper);
762 acg.cg_cs.cs_nffree++;
765 for (d = dupper; d + sblock.fs_frag <= acg.cg_ndblk;
766 d += sblock.fs_frag) {
767 blkno = d / sblock.fs_frag;
768 setblock(&sblock, cg_blksfree(&acg), blkno);
769 if (sblock.fs_contigsumsize > 0)
770 setbit(cg_clustersfree(&acg), blkno);
771 acg.cg_cs.cs_nbfree++;
773 if (d < acg.cg_ndblk) {
774 acg.cg_frsum[acg.cg_ndblk - d]++;
775 for (; d < acg.cg_ndblk; d++) {
776 setbit(cg_blksfree(&acg), d);
777 acg.cg_cs.cs_nffree++;
780 if (sblock.fs_contigsumsize > 0) {
781 int32_t *sump = cg_clustersum(&acg);
782 u_char *mapp = cg_clustersfree(&acg);
787 for (i = 0; i < acg.cg_nclusterblks; i++) {
788 if ((map & bit) != 0)
791 if (run > sblock.fs_contigsumsize)
792 run = sblock.fs_contigsumsize;
796 if ((i & (CHAR_BIT - 1)) != CHAR_BIT - 1)
804 if (run > sblock.fs_contigsumsize)
805 run = sblock.fs_contigsumsize;
811 * Write out the duplicate super block. Then write the cylinder
812 * group map and two blocks worth of inodes in a single write.
814 savedactualloc = sblock.fs_sblockactualloc;
815 sblock.fs_sblockactualloc =
816 dbtob(fsbtodb(&sblock, cgsblock(&sblock, cylno)));
817 if (sbwrite(&disk, 0) != 0)
818 err(1, "sbwrite: %s", disk.d_error);
819 sblock.fs_sblockactualloc = savedactualloc;
820 if (cgwrite(&disk) != 0)
821 err(1, "initcg: cgwrite: %s", disk.d_error);
823 dp1 = (struct ufs1_dinode *)(&iobuf[start]);
824 dp2 = (struct ufs2_dinode *)(&iobuf[start]);
825 for (i = 0; i < acg.cg_initediblk; i++) {
826 if (sblock.fs_magic == FS_UFS1_MAGIC) {
827 dp1->di_gen = newfs_random();
830 dp2->di_gen = newfs_random();
834 wtfs(fsbtodb(&sblock, cgimin(&sblock, cylno)), iobufsize, iobuf);
836 * For the old file system, we have to initialize all the inodes.
839 for (i = 2 * sblock.fs_frag;
840 i < sblock.fs_ipg / INOPF(&sblock);
841 i += sblock.fs_frag) {
842 dp1 = (struct ufs1_dinode *)(&iobuf[start]);
843 for (j = 0; j < INOPB(&sblock); j++) {
844 dp1->di_gen = newfs_random();
847 wtfs(fsbtodb(&sblock, cgimin(&sblock, cylno) + i),
848 sblock.fs_bsize, &iobuf[start]);
854 * initialize the file system
856 #define ROOTLINKCNT 3
858 static struct direct root_dir[] = {
859 { UFS_ROOTINO, sizeof(struct direct), DT_DIR, 1, "." },
860 { UFS_ROOTINO, sizeof(struct direct), DT_DIR, 2, ".." },
861 { UFS_ROOTINO + 1, sizeof(struct direct), DT_DIR, 5, ".snap" },
864 #define SNAPLINKCNT 2
866 static struct direct snap_dir[] = {
867 { UFS_ROOTINO + 1, sizeof(struct direct), DT_DIR, 1, "." },
868 { UFS_ROOTINO, sizeof(struct direct), DT_DIR, 2, ".." },
879 memset(&node, 0, sizeof node);
880 if ((grp = getgrnam("operator")) != NULL) {
883 warnx("Cannot retrieve operator gid, using gid 0.");
886 entries = (nflag) ? ROOTLINKCNT - 1: ROOTLINKCNT;
887 if (sblock.fs_magic == FS_UFS1_MAGIC) {
889 * initialize the node
891 node.dp1.di_atime = utime;
892 node.dp1.di_mtime = utime;
893 node.dp1.di_ctime = utime;
895 * create the root directory
897 node.dp1.di_mode = IFDIR | UMASK;
898 node.dp1.di_nlink = entries;
899 node.dp1.di_size = makedir(root_dir, entries);
900 node.dp1.di_db[0] = alloc(sblock.fs_fsize, node.dp1.di_mode);
902 btodb(fragroundup(&sblock, node.dp1.di_size));
903 wtfs(fsbtodb(&sblock, node.dp1.di_db[0]), sblock.fs_fsize,
905 iput(&node, UFS_ROOTINO);
908 * create the .snap directory
910 node.dp1.di_mode |= 020;
911 node.dp1.di_gid = gid;
912 node.dp1.di_nlink = SNAPLINKCNT;
913 node.dp1.di_size = makedir(snap_dir, SNAPLINKCNT);
915 alloc(sblock.fs_fsize, node.dp1.di_mode);
917 btodb(fragroundup(&sblock, node.dp1.di_size));
918 wtfs(fsbtodb(&sblock, node.dp1.di_db[0]),
919 sblock.fs_fsize, iobuf);
920 iput(&node, UFS_ROOTINO + 1);
924 * initialize the node
926 node.dp2.di_atime = utime;
927 node.dp2.di_mtime = utime;
928 node.dp2.di_ctime = utime;
929 node.dp2.di_birthtime = utime;
931 * create the root directory
933 node.dp2.di_mode = IFDIR | UMASK;
934 node.dp2.di_nlink = entries;
935 node.dp2.di_size = makedir(root_dir, entries);
936 node.dp2.di_db[0] = alloc(sblock.fs_fsize, node.dp2.di_mode);
938 btodb(fragroundup(&sblock, node.dp2.di_size));
939 wtfs(fsbtodb(&sblock, node.dp2.di_db[0]), sblock.fs_fsize,
941 iput(&node, UFS_ROOTINO);
944 * create the .snap directory
946 node.dp2.di_mode |= 020;
947 node.dp2.di_gid = gid;
948 node.dp2.di_nlink = SNAPLINKCNT;
949 node.dp2.di_size = makedir(snap_dir, SNAPLINKCNT);
951 alloc(sblock.fs_fsize, node.dp2.di_mode);
953 btodb(fragroundup(&sblock, node.dp2.di_size));
954 wtfs(fsbtodb(&sblock, node.dp2.di_db[0]),
955 sblock.fs_fsize, iobuf);
956 iput(&node, UFS_ROOTINO + 1);
962 * construct a set of directory entries in "iobuf".
963 * return size of directory.
966 makedir(struct direct *protodir, int entries)
972 memset(iobuf, 0, DIRBLKSIZ);
973 for (cp = iobuf, i = 0; i < entries - 1; i++) {
974 protodir[i].d_reclen = DIRSIZ(0, &protodir[i]);
975 memmove(cp, &protodir[i], protodir[i].d_reclen);
976 cp += protodir[i].d_reclen;
977 spcleft -= protodir[i].d_reclen;
979 protodir[i].d_reclen = spcleft;
980 memmove(cp, &protodir[i], DIRSIZ(0, &protodir[i]));
985 * allocate a block or frag
988 alloc(int size, int mode)
993 bread(&disk, part_ofs + fsbtodb(&sblock, cgtod(&sblock, 0)), (char *)&acg,
995 if (acg.cg_magic != CG_MAGIC) {
996 printf("cg 0: bad magic number\n");
999 if (acg.cg_cs.cs_nbfree == 0) {
1000 printf("first cylinder group ran out of space\n");
1003 for (d = 0; d < acg.cg_ndblk; d += sblock.fs_frag)
1004 if (isblock(&sblock, cg_blksfree(&acg), d / sblock.fs_frag))
1006 printf("internal error: can't find block in cyl 0\n");
1009 blkno = fragstoblks(&sblock, d);
1010 clrblock(&sblock, cg_blksfree(&acg), blkno);
1011 if (sblock.fs_contigsumsize > 0)
1012 clrbit(cg_clustersfree(&acg), blkno);
1013 acg.cg_cs.cs_nbfree--;
1014 sblock.fs_cstotal.cs_nbfree--;
1015 fscs[0].cs_nbfree--;
1017 acg.cg_cs.cs_ndir++;
1018 sblock.fs_cstotal.cs_ndir++;
1021 if (size != sblock.fs_bsize) {
1022 frag = howmany(size, sblock.fs_fsize);
1023 fscs[0].cs_nffree += sblock.fs_frag - frag;
1024 sblock.fs_cstotal.cs_nffree += sblock.fs_frag - frag;
1025 acg.cg_cs.cs_nffree += sblock.fs_frag - frag;
1026 acg.cg_frsum[sblock.fs_frag - frag]++;
1027 for (i = frag; i < sblock.fs_frag; i++)
1028 setbit(cg_blksfree(&acg), d + i);
1030 if (cgwrite(&disk) != 0)
1031 err(1, "alloc: cgwrite: %s", disk.d_error);
1032 return ((ufs2_daddr_t)d);
1036 * Allocate an inode on the disk
1039 iput(union dinode *ip, ino_t ino)
1043 bread(&disk, part_ofs + fsbtodb(&sblock, cgtod(&sblock, 0)), (char *)&acg,
1045 if (acg.cg_magic != CG_MAGIC) {
1046 printf("cg 0: bad magic number\n");
1049 acg.cg_cs.cs_nifree--;
1050 setbit(cg_inosused(&acg), ino);
1051 if (cgwrite(&disk) != 0)
1052 err(1, "iput: cgwrite: %s", disk.d_error);
1053 sblock.fs_cstotal.cs_nifree--;
1054 fscs[0].cs_nifree--;
1055 if (getinode(&disk, &dp, ino) == -1) {
1056 printf("iput: %s\n", disk.d_error);
1059 if (sblock.fs_magic == FS_UFS1_MAGIC)
1067 * possibly write to disk
1070 wtfs(ufs2_daddr_t bno, int size, char *bf)
1074 if (bwrite(&disk, part_ofs + bno, bf, size) < 0)
1075 err(36, "wtfs: %d bytes at sector %jd", size, (intmax_t)bno);
1079 * check if a block is available
1082 isblock(struct fs *fs, unsigned char *cp, int h)
1086 switch (fs->fs_frag) {
1088 return (cp[h] == 0xff);
1090 mask = 0x0f << ((h & 0x1) << 2);
1091 return ((cp[h >> 1] & mask) == mask);
1093 mask = 0x03 << ((h & 0x3) << 1);
1094 return ((cp[h >> 2] & mask) == mask);
1096 mask = 0x01 << (h & 0x7);
1097 return ((cp[h >> 3] & mask) == mask);
1099 fprintf(stderr, "isblock bad fs_frag %d\n", fs->fs_frag);
1105 * take a block out of the map
1108 clrblock(struct fs *fs, unsigned char *cp, int h)
1110 switch ((fs)->fs_frag) {
1115 cp[h >> 1] &= ~(0x0f << ((h & 0x1) << 2));
1118 cp[h >> 2] &= ~(0x03 << ((h & 0x3) << 1));
1121 cp[h >> 3] &= ~(0x01 << (h & 0x7));
1124 fprintf(stderr, "clrblock bad fs_frag %d\n", fs->fs_frag);
1130 * put a block into the map
1133 setblock(struct fs *fs, unsigned char *cp, int h)
1135 switch (fs->fs_frag) {
1140 cp[h >> 1] |= (0x0f << ((h & 0x1) << 2));
1143 cp[h >> 2] |= (0x03 << ((h & 0x3) << 1));
1146 cp[h >> 3] |= (0x01 << (h & 0x7));
1149 fprintf(stderr, "setblock bad fs_frag %d\n", fs->fs_frag);
1155 * Determine the number of characters in a
1167 if (ioctl(0, TIOCGWINSZ, &ws) != -1)
1168 columns = ws.ws_col;
1169 if (columns == 0 && (cp = getenv("COLUMNS")))
1172 columns = 80; /* last resort */
1181 for (n = 0; n < sizeof(n) * CHAR_BIT; n++)
1184 errx(1, "ilog2: %d is not a power of 2\n", val);
1188 * For the regression test, return predictable random values.
1189 * Otherwise use a true random number generator.
1194 static int nextnum = 1;
1198 return (arc4random());