newfs.c revision 1.6.2.3
1 /* $NetBSD: newfs.c,v 1.6.2.3 2001/07/13 05:14:23 perseant Exp $ */ 2 3 /*- 4 * Copyright (c) 1989, 1992, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <sys/cdefs.h> 37 #ifndef lint 38 __COPYRIGHT("@(#) Copyright (c) 1989, 1992, 1993\n\ 39 The Regents of the University of California. All rights reserved.\n"); 40 #endif /* not lint */ 41 42 #ifndef lint 43 #if 0 44 static char sccsid[] = "@(#)newfs.c 8.5 (Berkeley) 5/24/95"; 45 #else 46 __RCSID("$NetBSD: newfs.c,v 1.6.2.3 2001/07/13 05:14:23 perseant Exp $"); 47 #endif 48 #endif /* not lint */ 49 50 /* 51 * newfs: friendly front end to mkfs 52 */ 53 #include <sys/param.h> 54 #include <sys/ucred.h> 55 #include <sys/stat.h> 56 #include <sys/ioctl.h> 57 #include <sys/disklabel.h> 58 #include <sys/file.h> 59 #include <sys/mount.h> 60 #include <sys/sysctl.h> 61 #include <sys/time.h> 62 63 #include <ufs/ufs/dir.h> 64 #include <ufs/ufs/dinode.h> 65 #include <ufs/lfs/lfs.h> 66 67 #include <disktab.h> 68 #include <errno.h> 69 #include <unistd.h> 70 #include <stdio.h> 71 #include <stdlib.h> 72 #include <ctype.h> 73 #include <string.h> 74 #include <paths.h> 75 #include <util.h> 76 #include "config.h" 77 #include "extern.h" 78 79 #define COMPAT /* allow non-labeled disks */ 80 81 int version = DFL_VERSION; /* what version of lfs to make */ 82 int Nflag = 0; /* run without writing file system */ 83 int fssize; /* file system size */ 84 int sectorsize; /* bytes/sector */ 85 int fsize = 0; /* fragment size */ 86 int bsize = 0; /* block size */ 87 int ibsize = 0; /* inode block size */ 88 int interleave = 0; /* segment interleave */ 89 int minfree = MINFREE; /* free space threshold */ 90 int minfreeseg = 0; /* free segments reserved for the cleaner */ 91 u_int32_t roll_id = 0; /* roll-forward id */ 92 u_long memleft; /* virtual memory available */ 93 caddr_t membase; /* start address of memory based filesystem */ 94 #ifdef COMPAT 95 char *disktype; 96 int unlabeled; 97 #endif 98 99 char device[MAXPATHLEN]; 100 char *progname, *special; 101 102 static struct disklabel *getdisklabel(char *, int); 103 static struct disklabel *debug_readlabel(int); 104 #ifdef notdef 105 static void rewritelabel(char *, int, struct disklabel *); 106 #endif 107 static void usage(void); 108 109 /* CHUNKSIZE should be larger than MAXPHYS */ 110 #define CHUNKSIZE (1024 * 1024) 111 112 static size_t 113 auto_segsize(int fd, off_t len, int version) 114 { 115 off_t off, bw; 116 time_t start, finish; 117 char buf[CHUNKSIZE]; 118 long seeks; 119 size_t final; 120 int i; 121 122 /* First, get sequential access bandwidth */ 123 time(&start); 124 finish = start; 125 for (off = 0; finish - start < 10; off += CHUNKSIZE) { 126 if (pread(fd, buf, CHUNKSIZE, off) < 0) 127 break; 128 time(&finish); 129 } 130 /* Bandwidth = bytes / sec */ 131 /* printf("%ld bytes in %ld seconds\n", (long)off, (long)(finish - start)); */ 132 bw = off / (finish - start); 133 134 /* Second, seek time */ 135 time(&start); 136 finish = start; /* structure copy */ 137 for (seeks = 0; finish - start < 10; ) { 138 off = (((double)rand()) * len) / (off_t)RAND_MAX; 139 if (pread(fd, buf, dbtob(1), off) < 0) 140 break; 141 time(&finish); 142 ++seeks; 143 } 144 /* printf("%ld seeks in %ld seconds\n", (long)seeks, (long)(finish - start)); */ 145 /* Seek time in units/sec */ 146 seeks /= (finish - start); 147 if (seeks == 0) 148 seeks = 1; 149 150 printf("bw = %ld B/s, seek time %ld ms (%ld seeks/s)\n", 151 (long)bw, 1000/seeks, seeks); 152 final = dbtob(btodb(4 * bw / seeks)); 153 if (version == 1) { 154 for (i = 0; final; final >>= 1, i++) 155 ; 156 final = 1 << i; 157 } 158 printf("using initial segment size %ld\n", (long)final); 159 return final; 160 } 161 162 int 163 main(int argc, char **argv) 164 { 165 int ch; 166 struct partition *pp; 167 struct disklabel *lp; 168 struct stat st; 169 int debug, force, fsi, fso, segsize, maxpartitions; 170 daddr_t start; 171 char *cp, *opstring; 172 173 if ((progname = strrchr(*argv, '/')) != NULL) 174 ++progname; 175 else 176 progname = *argv; 177 178 maxpartitions = getmaxpartitions(); 179 if (maxpartitions > 26) 180 fatal("insane maxpartitions value %d", maxpartitions); 181 182 opstring = "AB:b:DFf:I:i:LM:m:NO:r:s:v:"; 183 184 debug = force = segsize = start = 0; 185 while ((ch = getopt(argc, argv, opstring)) != -1) 186 switch(ch) { 187 case 'A': /* Adaptively configure segment size */ 188 segsize = -1; 189 break; 190 case 'B': /* LFS segment size */ 191 if ((segsize = atoi(optarg)) < LFS_MINSEGSIZE) 192 fatal("%s: bad segment size", optarg); 193 break; 194 case 'D': 195 debug = 1; 196 break; 197 case 'F': 198 force = 1; 199 break; 200 case 'I': 201 interleave = atoi(optarg); 202 break; 203 case 'L': /* Compatibility only */ 204 break; 205 case 'M': 206 minfreeseg = atoi(optarg); 207 break; 208 case 'N': 209 Nflag++; 210 break; 211 case 'O': 212 start = atoi(optarg); 213 break; 214 #ifdef COMPAT 215 case 'T': 216 disktype = optarg; 217 break; 218 #endif 219 case 'b': 220 if ((bsize = atoi(optarg)) < LFS_MINBLOCKSIZE) 221 fatal("%s: bad block size", optarg); 222 break; 223 case 'f': 224 if ((fsize = atoi(optarg)) <= 0) 225 fatal("%s: bad frag size", optarg); 226 break; 227 case 'i': 228 if ((ibsize = atoi(optarg)) <= 0) 229 fatal("%s: bad inode block size", optarg); 230 break; 231 case 'm': 232 if ((minfree = atoi(optarg)) < 0 || minfree > 99) 233 fatal("%s: bad free space %%\n", optarg); 234 break; 235 case 'r': 236 if ((roll_id = strtoul(optarg, NULL, 0)) == 0) 237 fatal("%s: bad roll-forward id\n", optarg); 238 break; 239 case 's': 240 if ((fssize = atoi(optarg)) <= 0) 241 fatal("%s: bad file system size", optarg); 242 break; 243 case 'v': 244 version = atoi(optarg); 245 if (version <= 0 || version > LFS_VERSION) 246 fatal("%s: bad version", optarg); 247 break; 248 case '?': 249 default: 250 usage(); 251 } 252 argc -= optind; 253 argv += optind; 254 255 if (argc != 2 && argc != 1) 256 usage(); 257 258 /* 259 * If the -N flag isn't specified, open the output file. If no path 260 * prefix, try /dev/r%s and then /dev/%s. 261 */ 262 special = argv[0]; 263 if (strchr(special, '/') == NULL) { 264 (void)snprintf(device, sizeof(device), "%sr%s", _PATH_DEV, 265 special); 266 if (stat(device, &st) == -1) 267 (void)snprintf(device, sizeof(device), "%s%s", 268 _PATH_DEV, special); 269 special = device; 270 } 271 if (!Nflag) { 272 fso = open(special, 273 (debug ? O_CREAT : 0) | O_WRONLY, DEFFILEMODE); 274 if (fso < 0) 275 fatal("%s: %s", special, strerror(errno)); 276 } else 277 fso = -1; 278 279 /* Open the input file. */ 280 fsi = open(special, O_RDONLY); 281 if (fsi < 0) 282 fatal("%s: %s", special, strerror(errno)); 283 if (fstat(fsi, &st) < 0) 284 fatal("%s: %s", special, strerror(errno)); 285 286 287 if (!debug && !S_ISCHR(st.st_mode)) 288 (void)printf("%s: %s: not a character-special device\n", 289 progname, special); 290 cp = strchr(argv[0], '\0') - 1; 291 if (!debug 292 && (cp == 0 || ((*cp < 'a' || *cp > ('a' + maxpartitions - 1)) 293 && !isdigit(*cp)))) 294 fatal("%s: can't figure out file system partition", argv[0]); 295 296 #ifdef COMPAT 297 if (disktype == NULL) 298 disktype = argv[1]; 299 #endif 300 if (debug) 301 lp = debug_readlabel(fsi); 302 else 303 lp = getdisklabel(special, fsi); 304 305 if (isdigit(*cp)) 306 pp = &lp->d_partitions[0]; 307 else 308 pp = &lp->d_partitions[*cp - 'a']; 309 if (pp->p_size == 0) 310 fatal("%s: `%c' partition is unavailable", argv[0], *cp); 311 312 /* If force, make the partition look like an LFS */ 313 if(force) { 314 pp->p_fstype = FS_BSDLFS; 315 /* 0 means to use defaults */ 316 pp->p_fsize = 0; 317 pp->p_frag = 0; 318 pp->p_sgs = 0; 319 } 320 321 /* Try autoconfiguring segment size, if asked to */ 322 if (segsize == -1) 323 segsize = auto_segsize(fsi, dbtob(pp->p_size), version); 324 325 /* If we're making a LFS, we break out here */ 326 exit(make_lfs(fso, lp, pp, minfree, bsize, fsize, segsize, 327 minfreeseg, version, start, ibsize, interleave, 328 roll_id)); 329 } 330 331 #ifdef COMPAT 332 char lmsg[] = "%s: can't read disk label; disk type must be specified"; 333 #else 334 char lmsg[] = "%s: can't read disk label"; 335 #endif 336 337 static struct disklabel * 338 getdisklabel(char *s, int fd) 339 { 340 static struct disklabel lab; 341 342 if (ioctl(fd, DIOCGDINFO, (char *)&lab) < 0) { 343 #ifdef COMPAT 344 if (disktype) { 345 struct disklabel *lp; 346 347 unlabeled++; 348 lp = getdiskbyname(disktype); 349 if (lp == NULL) 350 fatal("%s: unknown disk type", disktype); 351 return (lp); 352 } 353 #endif 354 (void)fprintf(stderr, 355 "%s: ioctl (GDINFO): %s\n", progname, strerror(errno)); 356 fatal(lmsg, s); 357 } 358 return (&lab); 359 } 360 361 362 static struct disklabel * 363 debug_readlabel(int fd) 364 { 365 static struct disklabel lab; 366 int n; 367 368 if ((n = read(fd, &lab, sizeof(struct disklabel))) < 0) 369 fatal("unable to read disk label: %s", strerror(errno)); 370 else if (n < sizeof(struct disklabel)) 371 fatal("short read of disklabel: %d of %ld bytes", n, 372 (u_long) sizeof(struct disklabel)); 373 return(&lab); 374 } 375 376 #ifdef notdef 377 static void 378 rewritelabel(char *s, int fd, struct disklabel *lp) 379 { 380 #ifdef COMPAT 381 if (unlabeled) 382 return; 383 #endif 384 lp->d_checksum = 0; 385 lp->d_checksum = dkcksum(lp); 386 if (ioctl(fd, DIOCWDINFO, (char *)lp) < 0) { 387 (void)fprintf(stderr, 388 "%s: ioctl (WDINFO): %s\n", progname, strerror(errno)); 389 fatal("%s: can't rewrite disk label", s); 390 } 391 #if __vax__ 392 if (lp->d_type == DTYPE_SMD && lp->d_flags & D_BADSECT) { 393 int i; 394 int cfd; 395 daddr_t alt; 396 char specname[64]; 397 char blk[1024]; 398 char *cp; 399 400 /* 401 * Make name for 'c' partition. 402 */ 403 strcpy(specname, s); 404 cp = specname + strlen(specname) - 1; 405 if (!isdigit(*cp)) 406 *cp = 'c'; 407 cfd = open(specname, O_WRONLY); 408 if (cfd < 0) 409 fatal("%s: %s", specname, strerror(errno)); 410 memset(blk, 0, sizeof(blk)); 411 *(struct disklabel *)(blk + LABELOFFSET) = *lp; 412 alt = lp->d_ncylinders * lp->d_secpercyl - lp->d_nsectors; 413 for (i = 1; i < 11 && i < lp->d_nsectors; i += 2) { 414 if (lseek(cfd, (off_t)((alt + i) * lp->d_secsize), 415 SEEK_SET) == -1) 416 fatal("lseek to badsector area: %s", 417 strerror(errno)); 418 if (write(cfd, blk, lp->d_secsize) < lp->d_secsize) 419 fprintf(stderr, 420 "%s: alternate label %d write: %s\n", 421 progname, i/2, strerror(errno)); 422 } 423 close(cfd); 424 } 425 #endif /* vax */ 426 } 427 #endif /* notdef */ 428 429 void 430 usage() 431 { 432 fprintf(stderr, "usage: newfs_lfs [ -fsoptions ] special-device\n"); 433 fprintf(stderr, "where fsoptions are:\n"); 434 fprintf(stderr, "\t-A (autoconfigure segment size)\n"); 435 fprintf(stderr, "\t-B segment size in bytes\n"); 436 fprintf(stderr, "\t-D (debug)\n"); 437 fprintf(stderr, 438 "\t-N (do not create file system, just print out parameters)\n"); 439 fprintf(stderr, "\t-O first segment offset in sectors\n"); 440 fprintf(stderr, "\t-b block size in bytes\n"); 441 fprintf(stderr, "\t-f frag size in bytes\n"); 442 fprintf(stderr, "\t-m minimum free space %%\n"); 443 fprintf(stderr, "\t-s file system size in sectors\n"); 444 fprintf(stderr, "\t-v version\n"); 445 exit(1); 446 } 447
Indexes created Wed Oct 22 13:09:56 GMT 2025