1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 2002 Networks Associates Technology, Inc. 5 * All rights reserved. 6 * 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 11 * research program. 12 * 13 * Copyright (c) 1980, 1989, 1993 14 * The Regents of the University of California. All rights reserved. 15 * 16 * Redistribution and use in source and binary forms, with or without 17 * modification, are permitted provided that the following conditions 18 * are met: 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. 27 * 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 38 * SUCH DAMAGE. 39 */ 40 41 #if 0 42 #ifndef lint 43 static char sccsid[] = "@(#)mkfs.c 8.11 (Berkeley) 5/3/95"; 44 #endif /* not lint */ 45 #endif 46 #include <sys/cdefs.h> 47 __FBSDID("$FreeBSD$"); 48 49 #define _WANT_P_OSREL 50 #include <sys/param.h> 51 #include <sys/disklabel.h> 52 #include <sys/file.h> 53 #include <sys/ioctl.h> 54 #include <sys/mman.h> 55 #include <sys/resource.h> 56 #include <sys/stat.h> 57 #include <sys/wait.h> 58 #include <err.h> 59 #include <grp.h> 60 #include <limits.h> 61 #include <signal.h> 62 #include <stdlib.h> 63 #include <string.h> 64 #include <stdint.h> 65 #include <stdio.h> 66 #include <time.h> 67 #include <unistd.h> 68 #include <ufs/ufs/dinode.h> 69 #include <ufs/ufs/dir.h> 70 #include <ufs/ffs/fs.h> 71 #include "newfs.h" 72 73 /* 74 * make file system for cylinder-group style file systems 75 */ 76 #define UMASK 0755 77 #define POWEROF2(num) (((num) & ((num) - 1)) == 0) 78 79 static struct csum *fscs; 80 #define sblock disk.d_fs 81 #define acg disk.d_cg 82 83 union dinode { 84 struct ufs1_dinode dp1; 85 struct ufs2_dinode dp2; 86 }; 87 #define DIP(dp, field) \ 88 ((sblock.fs_magic == FS_UFS1_MAGIC) ? \ 89 (dp)->dp1.field : (dp)->dp2.field) 90 91 static caddr_t iobuf; 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); 105 106 void 107 mkfs(struct partition *pp, char *fsys) 108 { 109 int fragsperinode, optimalfpg, origdensity, minfpg, lastminfpg; 110 long i, j, csfrags; 111 uint cg; 112 time_t utime; 113 quad_t sizepb; 114 int width; 115 ino_t maxinum; 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; 119 char *fsrbuf; 120 union { 121 struct fs fdummy; 122 char cdummy[SBLOCKSIZE]; 123 } dummy; 124 #define fsdummy dummy.fdummy 125 #define chdummy dummy.cdummy 126 127 /* 128 * Our blocks == sector size, and the version of UFS we are using is 129 * specified by Oflag. 130 */ 131 disk.d_bsize = sectorsize; 132 disk.d_ufs = Oflag; 133 if (Rflag) 134 utime = 1000000000; 135 else 136 time(&utime); 137 if ((sblock.fs_si = malloc(sizeof(struct fs_summary_info))) == NULL) { 138 printf("Superblock summary info allocation failed.\n"); 139 exit(18); 140 } 141 sblock.fs_old_flags = FS_FLAGS_UPDATED; 142 sblock.fs_flags = 0; 143 if (Uflag) 144 sblock.fs_flags |= FS_DOSOFTDEP; 145 if (Lflag) 146 strlcpy(sblock.fs_volname, volumelabel, MAXVOLLEN); 147 if (Jflag) 148 sblock.fs_flags |= FS_GJOURNAL; 149 if (lflag) 150 sblock.fs_flags |= FS_MULTILABEL; 151 if (tflag) 152 sblock.fs_flags |= FS_TRIM; 153 /* 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. 157 */ 158 if (fssize <= 0) { 159 printf("preposterous size %jd\n", (intmax_t)fssize); 160 exit(13); 161 } 162 wtfs(fssize - (realsectorsize / DEV_BSIZE), realsectorsize, 163 (char *)&sblock); 164 /* 165 * collect and verify the file system density info 166 */ 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); 175 176 restart: 177 /* 178 * collect and verify the block and fragment sizes 179 */ 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", 184 sblock.fs_bsize); 185 exit(16); 186 } 187 if (!POWEROF2(sblock.fs_fsize)) { 188 printf("fragment size must be a power of 2, not %d\n", 189 sblock.fs_fsize); 190 exit(17); 191 } 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; 196 } 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; 201 } 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; 206 } 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; 211 } 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; 216 } 217 if (sblock.fs_fsize * MAXFRAG < sblock.fs_bsize) { 218 printf( 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; 222 } 223 if (maxbsize == 0) 224 maxbsize = bsize; 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); 231 } else { 232 sblock.fs_maxbsize = maxbsize; 233 } 234 /* 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. 239 */ 240 if (maxcontig == 0) 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); 246 } 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); 260 exit(21); 261 } 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); 265 266 /* 267 * Before the filesystem is finally initialized, mark it 268 * as incompletely initialized. 269 */ 270 sblock.fs_magic = FS_BAD_MAGIC; 271 272 if (Oflag == 1) { 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; 292 } else { 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)); 299 } 300 sblock.fs_sblkno = 301 roundup(howmany(sblock.fs_sblockloc + SBLOCKSIZE, sblock.fs_fsize), 302 sblock.fs_frag); 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; 310 } 311 312 /* 313 * It's impossible to create a snapshot in case that fs_maxfilesize 314 * is smaller than the fssize. 315 */ 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."); 319 } 320 321 /* 322 * Calculate the number of blocks to put into each cylinder group. 323 * 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. 330 * 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. 334 */ 335 retry: 336 maxinum = (((int64_t)(1)) << 32) - INOPB(&sblock); 337 minfragsperinode = 1 + fssize / maxinum; 338 if (density == 0) { 339 density = MAX(NFPI, minfragsperinode) * fsize; 340 } else if (density < minfragsperinode * fsize) { 341 origdensity = density; 342 density = minfragsperinode * fsize; 343 fprintf(stderr, "density increased from %d to %d\n", 344 origdensity, density); 345 } 346 origdensity = density; 347 for (;;) { 348 fragsperinode = MAX(numfrags(&sblock, density), 1); 349 if (fragsperinode < minfragsperinode) { 350 bsize <<= 1; 351 fsize <<= 1; 352 printf("Block size too small for a file system %s %d\n", 353 "of this size. Increasing blocksize to", bsize); 354 goto restart; 355 } 356 minfpg = fragsperinode * INOPB(&sblock); 357 if (minfpg > sblock.fs_size) 358 minfpg = sblock.fs_size; 359 sblock.fs_ipg = INOPB(&sblock); 360 sblock.fs_fpg = roundup(sblock.fs_iblkno + 361 sblock.fs_ipg / INOPF(&sblock), sblock.fs_frag); 362 if (sblock.fs_fpg < minfpg) 363 sblock.fs_fpg = minfpg; 364 sblock.fs_ipg = roundup(howmany(sblock.fs_fpg, fragsperinode), 365 INOPB(&sblock)); 366 sblock.fs_fpg = roundup(sblock.fs_iblkno + 367 sblock.fs_ipg / INOPF(&sblock), sblock.fs_frag); 368 if (sblock.fs_fpg < minfpg) 369 sblock.fs_fpg = minfpg; 370 sblock.fs_ipg = roundup(howmany(sblock.fs_fpg, fragsperinode), 371 INOPB(&sblock)); 372 if (CGSIZE(&sblock) < (unsigned long)sblock.fs_bsize) 373 break; 374 density -= sblock.fs_fsize; 375 } 376 if (density != origdensity) 377 printf("density reduced from %d to %d\n", origdensity, density); 378 /* 379 * Start packing more blocks into the cylinder group until 380 * it cannot grow any larger, the number of cylinder groups 381 * drops below MINCYLGRPS, or we reach the size requested. 382 * For UFS1 inodes per cylinder group are stored in an int16_t 383 * so fs_ipg is limited to 2^15 - 1. 384 */ 385 for ( ; sblock.fs_fpg < maxblkspercg; sblock.fs_fpg += sblock.fs_frag) { 386 sblock.fs_ipg = roundup(howmany(sblock.fs_fpg, fragsperinode), 387 INOPB(&sblock)); 388 if (Oflag > 1 || (Oflag == 1 && sblock.fs_ipg <= 0x7fff)) { 389 if (sblock.fs_size / sblock.fs_fpg < MINCYLGRPS) 390 break; 391 if (CGSIZE(&sblock) < (unsigned long)sblock.fs_bsize) 392 continue; 393 if (CGSIZE(&sblock) == (unsigned long)sblock.fs_bsize) 394 break; 395 } 396 sblock.fs_fpg -= sblock.fs_frag; 397 sblock.fs_ipg = roundup(howmany(sblock.fs_fpg, fragsperinode), 398 INOPB(&sblock)); 399 break; 400 } 401 /* 402 * Check to be sure that the last cylinder group has enough blocks 403 * to be viable. If it is too small, reduce the number of blocks 404 * per cylinder group which will have the effect of moving more 405 * blocks into the last cylinder group. 406 */ 407 optimalfpg = sblock.fs_fpg; 408 for (;;) { 409 sblock.fs_ncg = howmany(sblock.fs_size, sblock.fs_fpg); 410 lastminfpg = roundup(sblock.fs_iblkno + 411 sblock.fs_ipg / INOPF(&sblock), sblock.fs_frag); 412 if (sblock.fs_size < lastminfpg) { 413 printf("Filesystem size %jd < minimum size of %d\n", 414 (intmax_t)sblock.fs_size, lastminfpg); 415 exit(28); 416 } 417 if (sblock.fs_size % sblock.fs_fpg >= lastminfpg || 418 sblock.fs_size % sblock.fs_fpg == 0) 419 break; 420 sblock.fs_fpg -= sblock.fs_frag; 421 sblock.fs_ipg = roundup(howmany(sblock.fs_fpg, fragsperinode), 422 INOPB(&sblock)); 423 } 424 if (optimalfpg != sblock.fs_fpg) 425 printf("Reduced frags per cylinder group from %d to %d %s\n", 426 optimalfpg, sblock.fs_fpg, "to enlarge last cyl group"); 427 sblock.fs_cgsize = fragroundup(&sblock, CGSIZE(&sblock)); 428 sblock.fs_dblkno = sblock.fs_iblkno + sblock.fs_ipg / INOPF(&sblock); 429 if (Oflag == 1) { 430 sblock.fs_old_spc = sblock.fs_fpg * sblock.fs_old_nspf; 431 sblock.fs_old_nsect = sblock.fs_old_spc; 432 sblock.fs_old_npsect = sblock.fs_old_spc; 433 sblock.fs_old_ncyl = sblock.fs_ncg; 434 } 435 /* 436 * fill in remaining fields of the super block 437 */ 438 sblock.fs_csaddr = cgdmin(&sblock, 0); 439 sblock.fs_cssize = 440 fragroundup(&sblock, sblock.fs_ncg * sizeof(struct csum)); 441 fscs = (struct csum *)calloc(1, sblock.fs_cssize); 442 if (fscs == NULL) 443 errx(31, "calloc failed"); 444 sblock.fs_sbsize = fragroundup(&sblock, sizeof(struct fs)); 445 if (sblock.fs_sbsize > SBLOCKSIZE) 446 sblock.fs_sbsize = SBLOCKSIZE; 447 if (sblock.fs_sbsize < realsectorsize) 448 sblock.fs_sbsize = realsectorsize; 449 sblock.fs_minfree = minfree; 450 if (metaspace > 0 && metaspace < sblock.fs_fpg / 2) 451 sblock.fs_metaspace = blknum(&sblock, metaspace); 452 else if (metaspace != -1) 453 /* reserve half of minfree for metadata blocks */ 454 sblock.fs_metaspace = blknum(&sblock, 455 (sblock.fs_fpg * minfree) / 200); 456 if (maxbpg == 0) 457 sblock.fs_maxbpg = MAXBLKPG(sblock.fs_bsize); 458 else 459 sblock.fs_maxbpg = maxbpg; 460 sblock.fs_optim = opt; 461 sblock.fs_cgrotor = 0; 462 sblock.fs_pendingblocks = 0; 463 sblock.fs_pendinginodes = 0; 464 sblock.fs_fmod = 0; 465 sblock.fs_ronly = 0; 466 sblock.fs_state = 0; 467 sblock.fs_clean = 1; 468 sblock.fs_id[0] = (long)utime; 469 sblock.fs_id[1] = newfs_random(); 470 sblock.fs_fsmnt[0] = '\0'; 471 csfrags = howmany(sblock.fs_cssize, sblock.fs_fsize); 472 sblock.fs_dsize = sblock.fs_size - sblock.fs_sblkno - 473 sblock.fs_ncg * (sblock.fs_dblkno - sblock.fs_sblkno); 474 sblock.fs_cstotal.cs_nbfree = 475 fragstoblks(&sblock, sblock.fs_dsize) - 476 howmany(csfrags, sblock.fs_frag); 477 sblock.fs_cstotal.cs_nffree = 478 fragnum(&sblock, sblock.fs_size) + 479 (fragnum(&sblock, csfrags) > 0 ? 480 sblock.fs_frag - fragnum(&sblock, csfrags) : 0); 481 sblock.fs_cstotal.cs_nifree = 482 sblock.fs_ncg * sblock.fs_ipg - UFS_ROOTINO; 483 sblock.fs_cstotal.cs_ndir = 0; 484 sblock.fs_dsize -= csfrags; 485 sblock.fs_time = utime; 486 if (Oflag == 1) { 487 sblock.fs_old_time = utime; 488 sblock.fs_old_dsize = sblock.fs_dsize; 489 sblock.fs_old_csaddr = sblock.fs_csaddr; 490 sblock.fs_old_cstotal.cs_ndir = sblock.fs_cstotal.cs_ndir; 491 sblock.fs_old_cstotal.cs_nbfree = sblock.fs_cstotal.cs_nbfree; 492 sblock.fs_old_cstotal.cs_nifree = sblock.fs_cstotal.cs_nifree; 493 sblock.fs_old_cstotal.cs_nffree = sblock.fs_cstotal.cs_nffree; 494 } 495 /* 496 * Set flags for metadata that is being check-hashed. 497 * 498 * Metadata check hashes are not supported in the UFS version 1 499 * filesystem to keep it as small and simple as possible. 500 */ 501 if (Oflag > 1) { 502 sblock.fs_flags |= FS_METACKHASH; 503 if (getosreldate() >= P_OSREL_CK_CYLGRP) 504 sblock.fs_metackhash |= CK_CYLGRP; 505 if (getosreldate() >= P_OSREL_CK_SUPERBLOCK) 506 sblock.fs_metackhash |= CK_SUPERBLOCK; 507 if (getosreldate() >= P_OSREL_CK_INODE) 508 sblock.fs_metackhash |= CK_INODE; 509 } 510 511 /* 512 * Dump out summary information about file system. 513 */ 514 # define B2MBFACTOR (1 / (1024.0 * 1024.0)) 515 printf("%s: %.1fMB (%jd sectors) block size %d, fragment size %d\n", 516 fsys, (float)sblock.fs_size * sblock.fs_fsize * B2MBFACTOR, 517 (intmax_t)fsbtodb(&sblock, sblock.fs_size), sblock.fs_bsize, 518 sblock.fs_fsize); 519 printf("\tusing %d cylinder groups of %.2fMB, %d blks, %d inodes.\n", 520 sblock.fs_ncg, (float)sblock.fs_fpg * sblock.fs_fsize * B2MBFACTOR, 521 sblock.fs_fpg / sblock.fs_frag, sblock.fs_ipg); 522 if (sblock.fs_flags & FS_DOSOFTDEP) 523 printf("\twith soft updates\n"); 524 # undef B2MBFACTOR 525 526 if (Eflag && !Nflag) { 527 printf("Erasing sectors [%jd...%jd]\n", 528 sblock.fs_sblockloc / disk.d_bsize, 529 fsbtodb(&sblock, sblock.fs_size) - 1); 530 berase(&disk, sblock.fs_sblockloc / disk.d_bsize, 531 sblock.fs_size * sblock.fs_fsize - sblock.fs_sblockloc); 532 } 533 /* 534 * Wipe out old UFS1 superblock(s) if necessary. 535 */ 536 if (!Nflag && Oflag != 1 && realsectorsize <= SBLOCK_UFS1) { 537 i = bread(&disk, part_ofs + SBLOCK_UFS1 / disk.d_bsize, chdummy, 538 SBLOCKSIZE); 539 if (i == -1) 540 err(1, "can't read old UFS1 superblock: %s", 541 disk.d_error); 542 543 if (fsdummy.fs_magic == FS_UFS1_MAGIC) { 544 fsdummy.fs_magic = 0; 545 bwrite(&disk, part_ofs + SBLOCK_UFS1 / disk.d_bsize, 546 chdummy, SBLOCKSIZE); 547 for (cg = 0; cg < fsdummy.fs_ncg; cg++) { 548 if (fsbtodb(&fsdummy, cgsblock(&fsdummy, cg)) > 549 fssize) 550 break; 551 bwrite(&disk, part_ofs + fsbtodb(&fsdummy, 552 cgsblock(&fsdummy, cg)), chdummy, SBLOCKSIZE); 553 } 554 } 555 } 556 /* 557 * Reference the summary information so it will also be written. 558 */ 559 sblock.fs_csp = fscs; 560 if (!Nflag && sbwrite(&disk, 0) != 0) 561 err(1, "sbwrite: %s", disk.d_error); 562 if (Xflag == 1) { 563 printf("** Exiting on Xflag 1\n"); 564 exit(0); 565 } 566 if (Xflag == 2) 567 printf("** Leaving BAD MAGIC on Xflag 2\n"); 568 else 569 sblock.fs_magic = (Oflag != 1) ? FS_UFS2_MAGIC : FS_UFS1_MAGIC; 570 571 /* 572 * Now build the cylinders group blocks and 573 * then print out indices of cylinder groups. 574 */ 575 printf("super-block backups (for fsck_ffs -b #) at:\n"); 576 i = 0; 577 width = charsperline(); 578 /* 579 * Allocate space for two sets of inode blocks. 580 */ 581 iobufsize = 2 * sblock.fs_bsize; 582 if ((iobuf = calloc(1, iobufsize)) == 0) { 583 printf("Cannot allocate I/O buffer\n"); 584 exit(38); 585 } 586 /* 587 * Write out all the cylinder groups and backup superblocks. 588 */ 589 for (cg = 0; cg < sblock.fs_ncg; cg++) { 590 if (!Nflag) 591 initcg(cg, utime); 592 j = snprintf(tmpbuf, sizeof(tmpbuf), " %jd%s", 593 (intmax_t)fsbtodb(&sblock, cgsblock(&sblock, cg)), 594 cg < (sblock.fs_ncg-1) ? "," : ""); 595 if (j < 0) 596 tmpbuf[j = 0] = '\0'; 597 if (i + j >= width) { 598 printf("\n"); 599 i = 0; 600 } 601 i += j; 602 printf("%s", tmpbuf); 603 fflush(stdout); 604 } 605 printf("\n"); 606 if (Nflag) 607 exit(0); 608 /* 609 * Now construct the initial file system, 610 * then write out the super-block. 611 */ 612 fsinit(utime); 613 if (Oflag == 1) { 614 sblock.fs_old_cstotal.cs_ndir = sblock.fs_cstotal.cs_ndir; 615 sblock.fs_old_cstotal.cs_nbfree = sblock.fs_cstotal.cs_nbfree; 616 sblock.fs_old_cstotal.cs_nifree = sblock.fs_cstotal.cs_nifree; 617 sblock.fs_old_cstotal.cs_nffree = sblock.fs_cstotal.cs_nffree; 618 } 619 if (Xflag == 3) { 620 printf("** Exiting on Xflag 3\n"); 621 exit(0); 622 } 623 if (sbwrite(&disk, 0) != 0) 624 err(1, "sbwrite: %s", disk.d_error); 625 /* 626 * For UFS1 filesystems with a blocksize of 64K, the first 627 * alternate superblock resides at the location used for 628 * the default UFS2 superblock. As there is a valid 629 * superblock at this location, the boot code will use 630 * it as its first choice. Thus we have to ensure that 631 * all of its statistcs on usage are correct. 632 */ 633 if (Oflag == 1 && sblock.fs_bsize == 65536) 634 wtfs(fsbtodb(&sblock, cgsblock(&sblock, 0)), 635 sblock.fs_bsize, (char *)&sblock); 636 /* 637 * Read the last sector of the boot block, replace the last 638 * 20 bytes with the recovery information, then write it back. 639 * The recovery information only works for UFS2 filesystems. 640 * For UFS1, zero out the area to ensure that an old UFS2 641 * recovery block is not accidentally found. 642 */ 643 if ((fsrbuf = malloc(realsectorsize)) == NULL || bread(&disk, 644 part_ofs + (SBLOCK_UFS2 - realsectorsize) / disk.d_bsize, 645 fsrbuf, realsectorsize) == -1) 646 err(1, "can't read recovery area: %s", disk.d_error); 647 fsr = (struct fsrecovery *)&fsrbuf[realsectorsize - sizeof *fsr]; 648 if (sblock.fs_magic != FS_UFS2_MAGIC) { 649 memset(fsr, 0, sizeof *fsr); 650 } else { 651 fsr->fsr_magic = sblock.fs_magic; 652 fsr->fsr_fpg = sblock.fs_fpg; 653 fsr->fsr_fsbtodb = sblock.fs_fsbtodb; 654 fsr->fsr_sblkno = sblock.fs_sblkno; 655 fsr->fsr_ncg = sblock.fs_ncg; 656 } 657 wtfs((SBLOCK_UFS2 - realsectorsize) / disk.d_bsize, 658 realsectorsize, fsrbuf); 659 free(fsrbuf); 660 /* 661 * Update information about this partition in pack 662 * label, to that it may be updated on disk. 663 */ 664 if (pp != NULL) { 665 pp->p_fstype = FS_BSDFFS; 666 pp->p_fsize = sblock.fs_fsize; 667 pp->p_frag = sblock.fs_frag; 668 pp->p_cpg = sblock.fs_fpg; 669 } 670 /* 671 * This should NOT happen. If it does complain loudly and 672 * take evasive action. 673 */ 674 if ((int32_t)CGSIZE(&sblock) > sblock.fs_bsize) { 675 printf("INTERNAL ERROR: ipg %d, fpg %d, contigsumsize %d, ", 676 sblock.fs_ipg, sblock.fs_fpg, sblock.fs_contigsumsize); 677 printf("old_cpg %d, size_cg %zu, CGSIZE %zu\n", 678 sblock.fs_old_cpg, sizeof(struct cg), CGSIZE(&sblock)); 679 printf("Please file a FreeBSD bug report and include this " 680 "output\n"); 681 maxblkspercg = fragstoblks(&sblock, sblock.fs_fpg) - 1; 682 density = 0; 683 goto retry; 684 } 685 } 686 687 /* 688 * Initialize a cylinder group. 689 */ 690 void 691 initcg(int cylno, time_t utime) 692 { 693 long blkno, start; 694 off_t savedactualloc; 695 uint i, j, d, dlower, dupper; 696 ufs2_daddr_t cbase, dmax; 697 struct ufs1_dinode *dp1; 698 struct ufs2_dinode *dp2; 699 struct csum *cs; 700 701 /* 702 * Determine block bounds for cylinder group. 703 * Allow space for super block summary information in first 704 * cylinder group. 705 */ 706 cbase = cgbase(&sblock, cylno); 707 dmax = cbase + sblock.fs_fpg; 708 if (dmax > sblock.fs_size) 709 dmax = sblock.fs_size; 710 dlower = cgsblock(&sblock, cylno) - cbase; 711 dupper = cgdmin(&sblock, cylno) - cbase; 712 if (cylno == 0) 713 dupper += howmany(sblock.fs_cssize, sblock.fs_fsize); 714 cs = &fscs[cylno]; 715 memset(&acg, 0, sblock.fs_cgsize); 716 acg.cg_time = utime; 717 acg.cg_magic = CG_MAGIC; 718 acg.cg_cgx = cylno; 719 acg.cg_niblk = sblock.fs_ipg; 720 acg.cg_initediblk = MIN(sblock.fs_ipg, 2 * INOPB(&sblock)); 721 acg.cg_ndblk = dmax - cbase; 722 if (sblock.fs_contigsumsize > 0) 723 acg.cg_nclusterblks = acg.cg_ndblk / sblock.fs_frag; 724 start = &acg.cg_space[0] - (u_char *)(&acg.cg_firstfield); 725 if (Oflag == 2) { 726 acg.cg_iusedoff = start; 727 } else { 728 acg.cg_old_ncyl = sblock.fs_old_cpg; 729 acg.cg_old_time = acg.cg_time; 730 acg.cg_time = 0; 731 acg.cg_old_niblk = acg.cg_niblk; 732 acg.cg_niblk = 0; 733 acg.cg_initediblk = 0; 734 acg.cg_old_btotoff = start; 735 acg.cg_old_boff = acg.cg_old_btotoff + 736 sblock.fs_old_cpg * sizeof(int32_t); 737 acg.cg_iusedoff = acg.cg_old_boff + 738 sblock.fs_old_cpg * sizeof(u_int16_t); 739 } 740 acg.cg_freeoff = acg.cg_iusedoff + howmany(sblock.fs_ipg, CHAR_BIT); 741 acg.cg_nextfreeoff = acg.cg_freeoff + howmany(sblock.fs_fpg, CHAR_BIT); 742 if (sblock.fs_contigsumsize > 0) { 743 acg.cg_clustersumoff = 744 roundup(acg.cg_nextfreeoff, sizeof(u_int32_t)); 745 acg.cg_clustersumoff -= sizeof(u_int32_t); 746 acg.cg_clusteroff = acg.cg_clustersumoff + 747 (sblock.fs_contigsumsize + 1) * sizeof(u_int32_t); 748 acg.cg_nextfreeoff = acg.cg_clusteroff + 749 howmany(fragstoblks(&sblock, sblock.fs_fpg), CHAR_BIT); 750 } 751 if (acg.cg_nextfreeoff > (unsigned)sblock.fs_cgsize) { 752 printf("Panic: cylinder group too big\n"); 753 exit(37); 754 } 755 acg.cg_cs.cs_nifree += sblock.fs_ipg; 756 if (cylno == 0) 757 for (i = 0; i < (long)UFS_ROOTINO; i++) { 758 setbit(cg_inosused(&acg), i); 759 acg.cg_cs.cs_nifree--; 760 } 761 if (cylno > 0) { 762 /* 763 * In cylno 0, beginning space is reserved 764 * for boot and super blocks. 765 */ 766 for (d = 0; d < dlower; 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++; 772 } 773 } 774 if ((i = dupper % sblock.fs_frag)) { 775 acg.cg_frsum[sblock.fs_frag - i]++; 776 for (d = dupper + sblock.fs_frag - i; dupper < d; dupper++) { 777 setbit(cg_blksfree(&acg), dupper); 778 acg.cg_cs.cs_nffree++; 779 } 780 } 781 for (d = dupper; d + sblock.fs_frag <= acg.cg_ndblk; 782 d += sblock.fs_frag) { 783 blkno = d / sblock.fs_frag; 784 setblock(&sblock, cg_blksfree(&acg), blkno); 785 if (sblock.fs_contigsumsize > 0) 786 setbit(cg_clustersfree(&acg), blkno); 787 acg.cg_cs.cs_nbfree++; 788 } 789 if (d < acg.cg_ndblk) { 790 acg.cg_frsum[acg.cg_ndblk - d]++; 791 for (; d < acg.cg_ndblk; d++) { 792 setbit(cg_blksfree(&acg), d); 793 acg.cg_cs.cs_nffree++; 794 } 795 } 796 if (sblock.fs_contigsumsize > 0) { 797 int32_t *sump = cg_clustersum(&acg); 798 u_char *mapp = cg_clustersfree(&acg); 799 int map = *mapp++; 800 int bit = 1; 801 int run = 0; 802 803 for (i = 0; i < acg.cg_nclusterblks; i++) { 804 if ((map & bit) != 0) 805 run++; 806 else if (run != 0) { 807 if (run > sblock.fs_contigsumsize) 808 run = sblock.fs_contigsumsize; 809 sump[run]++; 810 run = 0; 811 } 812 if ((i & (CHAR_BIT - 1)) != CHAR_BIT - 1) 813 bit <<= 1; 814 else { 815 map = *mapp++; 816 bit = 1; 817 } 818 } 819 if (run != 0) { 820 if (run > sblock.fs_contigsumsize) 821 run = sblock.fs_contigsumsize; 822 sump[run]++; 823 } 824 } 825 *cs = acg.cg_cs; 826 /* 827 * Write out the duplicate super block. Then write the cylinder 828 * group map and two blocks worth of inodes in a single write. 829 */ 830 savedactualloc = sblock.fs_sblockactualloc; 831 sblock.fs_sblockactualloc = 832 dbtob(fsbtodb(&sblock, cgsblock(&sblock, cylno))); 833 if (sbwrite(&disk, 0) != 0) 834 err(1, "sbwrite: %s", disk.d_error); 835 sblock.fs_sblockactualloc = savedactualloc; 836 if (cgwrite(&disk) != 0) 837 err(1, "initcg: cgwrite: %s", disk.d_error); 838 start = 0; 839 dp1 = (struct ufs1_dinode *)(&iobuf[start]); 840 dp2 = (struct ufs2_dinode *)(&iobuf[start]); 841 for (i = 0; i < acg.cg_initediblk; i++) { 842 if (sblock.fs_magic == FS_UFS1_MAGIC) { 843 dp1->di_gen = newfs_random(); 844 dp1++; 845 } else { 846 dp2->di_gen = newfs_random(); 847 dp2++; 848 } 849 } 850 wtfs(fsbtodb(&sblock, cgimin(&sblock, cylno)), iobufsize, iobuf); 851 /* 852 * For the old file system, we have to initialize all the inodes. 853 */ 854 if (Oflag == 1) { 855 for (i = 2 * sblock.fs_frag; 856 i < sblock.fs_ipg / INOPF(&sblock); 857 i += sblock.fs_frag) { 858 dp1 = (struct ufs1_dinode *)(&iobuf[start]); 859 for (j = 0; j < INOPB(&sblock); j++) { 860 dp1->di_gen = newfs_random(); 861 dp1++; 862 } 863 wtfs(fsbtodb(&sblock, cgimin(&sblock, cylno) + i), 864 sblock.fs_bsize, &iobuf[start]); 865 } 866 } 867 } 868 869 /* 870 * initialize the file system 871 */ 872 #define ROOTLINKCNT 3 873 874 static struct direct root_dir[] = { 875 { UFS_ROOTINO, sizeof(struct direct), DT_DIR, 1, "." }, 876 { UFS_ROOTINO, sizeof(struct direct), DT_DIR, 2, ".." }, 877 { UFS_ROOTINO + 1, sizeof(struct direct), DT_DIR, 5, ".snap" }, 878 }; 879 880 #define SNAPLINKCNT 2 881 882 static struct direct snap_dir[] = { 883 { UFS_ROOTINO + 1, sizeof(struct direct), DT_DIR, 1, "." }, 884 { UFS_ROOTINO, sizeof(struct direct), DT_DIR, 2, ".." }, 885 }; 886 887 void 888 fsinit(time_t utime) 889 { 890 union dinode node; 891 struct group *grp; 892 gid_t gid; 893 int entries; 894 895 memset(&node, 0, sizeof node); 896 if ((grp = getgrnam("operator")) != NULL) { 897 gid = grp->gr_gid; 898 } else { 899 warnx("Cannot retrieve operator gid, using gid 0."); 900 gid = 0; 901 } 902 entries = (nflag) ? ROOTLINKCNT - 1: ROOTLINKCNT; 903 if (sblock.fs_magic == FS_UFS1_MAGIC) { 904 /* 905 * initialize the node 906 */ 907 node.dp1.di_atime = utime; 908 node.dp1.di_mtime = utime; 909 node.dp1.di_ctime = utime; 910 /* 911 * create the root directory 912 */ 913 node.dp1.di_mode = IFDIR | UMASK; 914 node.dp1.di_nlink = entries; 915 node.dp1.di_size = makedir(root_dir, entries); 916 node.dp1.di_db[0] = alloc(sblock.fs_fsize, node.dp1.di_mode); 917 node.dp1.di_blocks = 918 btodb(fragroundup(&sblock, node.dp1.di_size)); 919 wtfs(fsbtodb(&sblock, node.dp1.di_db[0]), sblock.fs_fsize, 920 iobuf); 921 iput(&node, UFS_ROOTINO); 922 if (!nflag) { 923 /* 924 * create the .snap directory 925 */ 926 node.dp1.di_mode |= 020; 927 node.dp1.di_gid = gid; 928 node.dp1.di_nlink = SNAPLINKCNT; 929 node.dp1.di_size = makedir(snap_dir, SNAPLINKCNT); 930 node.dp1.di_db[0] = 931 alloc(sblock.fs_fsize, node.dp1.di_mode); 932 node.dp1.di_blocks = 933 btodb(fragroundup(&sblock, node.dp1.di_size)); 934 node.dp1.di_dirdepth = 1; 935 wtfs(fsbtodb(&sblock, node.dp1.di_db[0]), 936 sblock.fs_fsize, iobuf); 937 iput(&node, UFS_ROOTINO + 1); 938 } 939 } else { 940 /* 941 * initialize the node 942 */ 943 node.dp2.di_atime = utime; 944 node.dp2.di_mtime = utime; 945 node.dp2.di_ctime = utime; 946 node.dp2.di_birthtime = utime; 947 /* 948 * create the root directory 949 */ 950 node.dp2.di_mode = IFDIR | UMASK; 951 node.dp2.di_nlink = entries; 952 node.dp2.di_size = makedir(root_dir, entries); 953 node.dp2.di_db[0] = alloc(sblock.fs_fsize, node.dp2.di_mode); 954 node.dp2.di_blocks = 955 btodb(fragroundup(&sblock, node.dp2.di_size)); 956 wtfs(fsbtodb(&sblock, node.dp2.di_db[0]), sblock.fs_fsize, 957 iobuf); 958 iput(&node, UFS_ROOTINO); 959 if (!nflag) { 960 /* 961 * create the .snap directory 962 */ 963 node.dp2.di_mode |= 020; 964 node.dp2.di_gid = gid; 965 node.dp2.di_nlink = SNAPLINKCNT; 966 node.dp2.di_size = makedir(snap_dir, SNAPLINKCNT); 967 node.dp2.di_db[0] = 968 alloc(sblock.fs_fsize, node.dp2.di_mode); 969 node.dp2.di_blocks = 970 btodb(fragroundup(&sblock, node.dp2.di_size)); 971 node.dp2.di_dirdepth = 1; 972 wtfs(fsbtodb(&sblock, node.dp2.di_db[0]), 973 sblock.fs_fsize, iobuf); 974 iput(&node, UFS_ROOTINO + 1); 975 } 976 } 977 } 978 979 /* 980 * construct a set of directory entries in "iobuf". 981 * return size of directory. 982 */ 983 int 984 makedir(struct direct *protodir, int entries) 985 { 986 char *cp; 987 int i, spcleft; 988 989 spcleft = DIRBLKSIZ; 990 memset(iobuf, 0, DIRBLKSIZ); 991 for (cp = iobuf, i = 0; i < entries - 1; i++) { 992 protodir[i].d_reclen = DIRSIZ(0, &protodir[i]); 993 memmove(cp, &protodir[i], protodir[i].d_reclen); 994 cp += protodir[i].d_reclen; 995 spcleft -= protodir[i].d_reclen; 996 } 997 protodir[i].d_reclen = spcleft; 998 memmove(cp, &protodir[i], DIRSIZ(0, &protodir[i])); 999 return (DIRBLKSIZ); 1000 } 1001 1002 /* 1003 * allocate a block or frag 1004 */ 1005 ufs2_daddr_t 1006 alloc(int size, int mode) 1007 { 1008 int i, blkno, frag; 1009 uint d; 1010 1011 bread(&disk, part_ofs + fsbtodb(&sblock, cgtod(&sblock, 0)), (char *)&acg, 1012 sblock.fs_cgsize); 1013 if (acg.cg_magic != CG_MAGIC) { 1014 printf("cg 0: bad magic number\n"); 1015 exit(38); 1016 } 1017 if (acg.cg_cs.cs_nbfree == 0) { 1018 printf("first cylinder group ran out of space\n"); 1019 exit(39); 1020 } 1021 for (d = 0; d < acg.cg_ndblk; d += sblock.fs_frag) 1022 if (isblock(&sblock, cg_blksfree(&acg), d / sblock.fs_frag)) 1023 goto goth; 1024 printf("internal error: can't find block in cyl 0\n"); 1025 exit(40); 1026 goth: 1027 blkno = fragstoblks(&sblock, d); 1028 clrblock(&sblock, cg_blksfree(&acg), blkno); 1029 if (sblock.fs_contigsumsize > 0) 1030 clrbit(cg_clustersfree(&acg), blkno); 1031 acg.cg_cs.cs_nbfree--; 1032 sblock.fs_cstotal.cs_nbfree--; 1033 fscs[0].cs_nbfree--; 1034 if (mode & IFDIR) { 1035 acg.cg_cs.cs_ndir++; 1036 sblock.fs_cstotal.cs_ndir++; 1037 fscs[0].cs_ndir++; 1038 } 1039 if (size != sblock.fs_bsize) { 1040 frag = howmany(size, sblock.fs_fsize); 1041 fscs[0].cs_nffree += sblock.fs_frag - frag; 1042 sblock.fs_cstotal.cs_nffree += sblock.fs_frag - frag; 1043 acg.cg_cs.cs_nffree += sblock.fs_frag - frag; 1044 acg.cg_frsum[sblock.fs_frag - frag]++; 1045 for (i = frag; i < sblock.fs_frag; i++) 1046 setbit(cg_blksfree(&acg), d + i); 1047 } 1048 if (cgwrite(&disk) != 0) 1049 err(1, "alloc: cgwrite: %s", disk.d_error); 1050 return ((ufs2_daddr_t)d); 1051 } 1052 1053 /* 1054 * Allocate an inode on the disk 1055 */ 1056 void 1057 iput(union dinode *ip, ino_t ino) 1058 { 1059 union dinodep dp; 1060 1061 bread(&disk, part_ofs + fsbtodb(&sblock, cgtod(&sblock, 0)), (char *)&acg, 1062 sblock.fs_cgsize); 1063 if (acg.cg_magic != CG_MAGIC) { 1064 printf("cg 0: bad magic number\n"); 1065 exit(31); 1066 } 1067 acg.cg_cs.cs_nifree--; 1068 setbit(cg_inosused(&acg), ino); 1069 if (cgwrite(&disk) != 0) 1070 err(1, "iput: cgwrite: %s", disk.d_error); 1071 sblock.fs_cstotal.cs_nifree--; 1072 fscs[0].cs_nifree--; 1073 if (getinode(&disk, &dp, ino) == -1) { 1074 printf("iput: %s\n", disk.d_error); 1075 exit(32); 1076 } 1077 if (sblock.fs_magic == FS_UFS1_MAGIC) 1078 *dp.dp1 = ip->dp1; 1079 else 1080 *dp.dp2 = ip->dp2; 1081 putinode(&disk); 1082 } 1083 1084 /* 1085 * possibly write to disk 1086 */ 1087 static void 1088 wtfs(ufs2_daddr_t bno, int size, char *bf) 1089 { 1090 if (Nflag) 1091 return; 1092 if (bwrite(&disk, part_ofs + bno, bf, size) < 0) 1093 err(36, "wtfs: %d bytes at sector %jd", size, (intmax_t)bno); 1094 } 1095 1096 /* 1097 * check if a block is available 1098 */ 1099 static int 1100 isblock(struct fs *fs, unsigned char *cp, int h) 1101 { 1102 unsigned char mask; 1103 1104 switch (fs->fs_frag) { 1105 case 8: 1106 return (cp[h] == 0xff); 1107 case 4: 1108 mask = 0x0f << ((h & 0x1) << 2); 1109 return ((cp[h >> 1] & mask) == mask); 1110 case 2: 1111 mask = 0x03 << ((h & 0x3) << 1); 1112 return ((cp[h >> 2] & mask) == mask); 1113 case 1: 1114 mask = 0x01 << (h & 0x7); 1115 return ((cp[h >> 3] & mask) == mask); 1116 default: 1117 fprintf(stderr, "isblock bad fs_frag %d\n", fs->fs_frag); 1118 return (0); 1119 } 1120 } 1121 1122 /* 1123 * take a block out of the map 1124 */ 1125 static void 1126 clrblock(struct fs *fs, unsigned char *cp, int h) 1127 { 1128 switch ((fs)->fs_frag) { 1129 case 8: 1130 cp[h] = 0; 1131 return; 1132 case 4: 1133 cp[h >> 1] &= ~(0x0f << ((h & 0x1) << 2)); 1134 return; 1135 case 2: 1136 cp[h >> 2] &= ~(0x03 << ((h & 0x3) << 1)); 1137 return; 1138 case 1: 1139 cp[h >> 3] &= ~(0x01 << (h & 0x7)); 1140 return; 1141 default: 1142 fprintf(stderr, "clrblock bad fs_frag %d\n", fs->fs_frag); 1143 return; 1144 } 1145 } 1146 1147 /* 1148 * put a block into the map 1149 */ 1150 static void 1151 setblock(struct fs *fs, unsigned char *cp, int h) 1152 { 1153 switch (fs->fs_frag) { 1154 case 8: 1155 cp[h] = 0xff; 1156 return; 1157 case 4: 1158 cp[h >> 1] |= (0x0f << ((h & 0x1) << 2)); 1159 return; 1160 case 2: 1161 cp[h >> 2] |= (0x03 << ((h & 0x3) << 1)); 1162 return; 1163 case 1: 1164 cp[h >> 3] |= (0x01 << (h & 0x7)); 1165 return; 1166 default: 1167 fprintf(stderr, "setblock bad fs_frag %d\n", fs->fs_frag); 1168 return; 1169 } 1170 } 1171 1172 /* 1173 * Determine the number of characters in a 1174 * single line. 1175 */ 1176 1177 static int 1178 charsperline(void) 1179 { 1180 int columns; 1181 char *cp; 1182 struct winsize ws; 1183 1184 columns = 0; 1185 if (ioctl(0, TIOCGWINSZ, &ws) != -1) 1186 columns = ws.ws_col; 1187 if (columns == 0 && (cp = getenv("COLUMNS"))) 1188 columns = atoi(cp); 1189 if (columns == 0) 1190 columns = 80; /* last resort */ 1191 return (columns); 1192 } 1193 1194 static int 1195 ilog2(int val) 1196 { 1197 u_int n; 1198 1199 for (n = 0; n < sizeof(n) * CHAR_BIT; n++) 1200 if (1 << n == val) 1201 return (n); 1202 errx(1, "ilog2: %d is not a power of 2\n", val); 1203 } 1204 1205 /* 1206 * For the regression test, return predictable random values. 1207 * Otherwise use a true random number generator. 1208 */ 1209 static u_int32_t 1210 newfs_random(void) 1211 { 1212 static int nextnum = 1; 1213 1214 if (Rflag) 1215 return (nextnum++); 1216 return (arc4random()); 1217 } 1218