newfs.c revision 1.6.2.1
1 /* $NetBSD: newfs.c,v 1.6.2.1 2001/06/27 03:49:42 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 1.6.2.1 2001/06/27 03:49:42 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 = 1; /* 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 int main __P((int, char **)); 103 static struct disklabel *getdisklabel __P((char *, int)); 104 static struct disklabel *debug_readlabel __P((int)); 105 #ifdef notdef 106 static void rewritelabel __P((char *, int, struct disklabel *)); 107 #endif 108 static void usage __P((void)); 109 110 /* CHUNKSIZE should be larger than MAXPHYS */ 111 #define CHUNKSIZE (1024 * 1024) 112 113 static size_t 114 auto_segsize(int fd, off_t len, int version) 115 { 116 off_t off, bw; 117 time_t start, finish; 118 char buf[CHUNKSIZE]; 119 long seeks; 120 size_t final; 121 int i; 122 123 /* First, get sequential access bandwidth */ 124 time(&start); 125 finish = start; 126 for (off = 0; finish - start < 10; off += CHUNKSIZE) { 127 if (pread(fd, buf, CHUNKSIZE, off) < 0) 128 break; 129 time(&finish); 130 } 131 /* Bandwidth = bytes / sec */ 132 /* printf("%ld bytes in %ld seconds\n", (long)off, (long)(finish - start)); */ 133 bw = off / (finish - start); 134 135 /* Second, seek time */ 136 time(&start); 137 finish = start; /* structure copy */ 138 for (seeks = 0; finish - start < 10; ) { 139 off = (((double)rand()) * len) / (off_t)RAND_MAX; 140 if (pread(fd, buf, dbtob(1), off) < 0) 141 break; 142 time(&finish); 143 ++seeks; 144 } 145 /* printf("%ld seeks in %ld seconds\n", (long)seeks, (long)(finish - start)); */ 146 /* Seek time in units/sec */ 147 seeks /= (finish - start); 148 if (seeks == 0) 149 seeks = 1; 150 151 printf("bw = %ld B/s, seek time %ld ms (%ld seeks/s)\n", 152 (long)bw, 1000/seeks, seeks); 153 final = dbtob(btodb(4 * bw / seeks)); 154 if (version == 1) { 155 for (i = 0; final; final >>= 1, i++) 156 ; 157 final = 1 << i; 158 } 159 printf("using initial segment size %ld\n", (long)final); 160 return final; 161 } 162 163 int 164 main(argc, argv) 165 int argc; 166 char *argv[]; 167 { 168 int ch; 169 struct partition *pp; 170 struct disklabel *lp; 171 struct stat st; 172 int debug, force, fsi, fso, segsize, maxpartitions; 173 daddr_t start; 174 char *cp, *opstring; 175 176 if ((progname = strrchr(*argv, '/')) != NULL) 177 ++progname; 178 else 179 progname = *argv; 180 181 maxpartitions = getmaxpartitions(); 182 if (maxpartitions > 26) 183 fatal("insane maxpartitions value %d", maxpartitions); 184 185 opstring = "AB:DFI:LNb:f:M:O:i:m:r:s:v:"; 186 187 debug = force = segsize = start = 0; 188 while ((ch = getopt(argc, argv, opstring)) != -1) 189 switch(ch) { 190 case 'A': /* Adaptively configure segment size */ 191 segsize = -1; 192 break; 193 case 'B': /* LFS segment size */ 194 if ((segsize = atoi(optarg)) < LFS_MINSEGSIZE) 195 fatal("%s: bad segment size", optarg); 196 break; 197 case 'D': 198 debug = 1; 199 break; 200 case 'F': 201 force = 1; 202 break; 203 case 'I': 204 interleave = atoi(optarg); 205 break; 206 case 'L': /* Compatibility only */ 207 break; 208 case 'M': 209 minfreeseg = atoi(optarg); 210 break; 211 case 'N': 212 Nflag++; 213 break; 214 case 'O': 215 start = atoi(optarg); 216 break; 217 #ifdef COMPAT 218 case 'T': 219 disktype = optarg; 220 break; 221 #endif 222 case 'b': 223 if ((bsize = atoi(optarg)) < LFS_MINBLOCKSIZE) 224 fatal("%s: bad block size", optarg); 225 break; 226 case 'f': 227 if ((fsize = atoi(optarg)) <= 0) 228 fatal("%s: bad frag size", optarg); 229 break; 230 case 'i': 231 if ((ibsize = atoi(optarg)) <= 0) 232 fatal("%s: bad inode block size", optarg); 233 break; 234 case 'm': 235 if ((minfree = atoi(optarg)) < 0 || minfree > 99) 236 fatal("%s: bad free space %%\n", optarg); 237 break; 238 case 'r': 239 if ((roll_id = strtoul(optarg, NULL, 0)) == 0) 240 fatal("%s: bad roll-forward id\n", optarg); 241 break; 242 case 's': 243 if ((fssize = atoi(optarg)) <= 0) 244 fatal("%s: bad file system size", optarg); 245 break; 246 case 'v': 247 version = atoi(optarg); 248 if (version <= 0 || version > LFS_VERSION) 249 fatal("%s: bad version", optarg); 250 break; 251 case '?': 252 default: 253 usage(); 254 } 255 argc -= optind; 256 argv += optind; 257 258 if (argc != 2 && argc != 1) 259 usage(); 260 261 /* 262 * If the -N flag isn't specified, open the output file. If no path 263 * prefix, try /dev/r%s and then /dev/%s. 264 */ 265 special = argv[0]; 266 if (strchr(special, '/') == NULL) { 267 (void)snprintf(device, sizeof(device), "%sr%s", _PATH_DEV, 268 special); 269 if (stat(device, &st) == -1) 270 (void)snprintf(device, sizeof(device), "%s%s", 271 _PATH_DEV, special); 272 special = device; 273 } 274 if (!Nflag) { 275 fso = open(special, 276 (debug ? O_CREAT : 0) | O_WRONLY, DEFFILEMODE); 277 if (fso < 0) 278 fatal("%s: %s", special, strerror(errno)); 279 } else 280 fso = -1; 281 282 /* Open the input file. */ 283 fsi = open(special, O_RDONLY); 284 if (fsi < 0) 285 fatal("%s: %s", special, strerror(errno)); 286 if (fstat(fsi, &st) < 0) 287 fatal("%s: %s", special, strerror(errno)); 288 289 290 if (!debug && !S_ISCHR(st.st_mode)) 291 (void)printf("%s: %s: not a character-special device\n", 292 progname, special); 293 cp = strchr(argv[0], '\0') - 1; 294 if (!debug 295 && (cp == 0 || ((*cp < 'a' || *cp > ('a' + maxpartitions - 1)) 296 && !isdigit(*cp)))) 297 fatal("%s: can't figure out file system partition", argv[0]); 298 299 #ifdef COMPAT 300 if (disktype == NULL) 301 disktype = argv[1]; 302 #endif 303 if (debug) 304 lp = debug_readlabel(fsi); 305 else 306 lp = getdisklabel(special, fsi); 307 308 if (isdigit(*cp)) 309 pp = &lp->d_partitions[0]; 310 else 311 pp = &lp->d_partitions[*cp - 'a']; 312 if (pp->p_size == 0) 313 fatal("%s: `%c' partition is unavailable", argv[0], *cp); 314 315 /* If force, make the partition look like an LFS */ 316 if(force) { 317 pp->p_fstype = FS_BSDLFS; 318 /* 0 means to use defaults */ 319 pp->p_fsize = 0; 320 pp->p_frag = 0; 321 pp->p_sgs = 0; 322 } 323 324 /* Try autoconfiguring segment size, if asked to */ 325 if (segsize == -1) 326 segsize = auto_segsize(fsi, dbtob(pp->p_size), version); 327 328 /* If we're making a LFS, we break out here */ 329 exit(make_lfs(fso, lp, pp, minfree, bsize, fsize, segsize, 330 minfreeseg, version, start, ibsize, interleave, 331 roll_id)); 332 } 333 334 #ifdef COMPAT 335 char lmsg[] = "%s: can't read disk label; disk type must be specified"; 336 #else 337 char lmsg[] = "%s: can't read disk label"; 338 #endif 339 340 static struct disklabel * 341 getdisklabel(s, fd) 342 char *s; 343 int fd; 344 { 345 static struct disklabel lab; 346 347 if (ioctl(fd, DIOCGDINFO, (char *)&lab) < 0) { 348 #ifdef COMPAT 349 if (disktype) { 350 struct disklabel *lp; 351 352 unlabeled++; 353 lp = getdiskbyname(disktype); 354 if (lp == NULL) 355 fatal("%s: unknown disk type", disktype); 356 return (lp); 357 } 358 #endif 359 (void)fprintf(stderr, 360 "%s: ioctl (GDINFO): %s\n", progname, strerror(errno)); 361 fatal(lmsg, s); 362 } 363 return (&lab); 364 } 365 366 367 static struct disklabel * 368 debug_readlabel(fd) 369 int fd; 370 { 371 static struct disklabel lab; 372 int n; 373 374 if ((n = read(fd, &lab, sizeof(struct disklabel))) < 0) 375 fatal("unable to read disk label: %s", strerror(errno)); 376 else if (n < sizeof(struct disklabel)) 377 fatal("short read of disklabel: %d of %ld bytes", n, 378 (u_long) sizeof(struct disklabel)); 379 return(&lab); 380 } 381 382 #ifdef notdef 383 static void 384 rewritelabel(s, fd, lp) 385 char *s; 386 int fd; 387 struct disklabel *lp; 388 { 389 #ifdef COMPAT 390 if (unlabeled) 391 return; 392 #endif 393 lp->d_checksum = 0; 394 lp->d_checksum = dkcksum(lp); 395 if (ioctl(fd, DIOCWDINFO, (char *)lp) < 0) { 396 (void)fprintf(stderr, 397 "%s: ioctl (WDINFO): %s\n", progname, strerror(errno)); 398 fatal("%s: can't rewrite disk label", s); 399 } 400 #if __vax__ 401 if (lp->d_type == DTYPE_SMD && lp->d_flags & D_BADSECT) { 402 int i; 403 int cfd; 404 daddr_t alt; 405 char specname[64]; 406 char blk[1024]; 407 char *cp; 408 409 /* 410 * Make name for 'c' partition. 411 */ 412 strcpy(specname, s); 413 cp = specname + strlen(specname) - 1; 414 if (!isdigit(*cp)) 415 *cp = 'c'; 416 cfd = open(specname, O_WRONLY); 417 if (cfd < 0) 418 fatal("%s: %s", specname, strerror(errno)); 419 memset(blk, 0, sizeof(blk)); 420 *(struct disklabel *)(blk + LABELOFFSET) = *lp; 421 alt = lp->d_ncylinders * lp->d_secpercyl - lp->d_nsectors; 422 for (i = 1; i < 11 && i < lp->d_nsectors; i += 2) { 423 if (lseek(cfd, (off_t)((alt + i) * lp->d_secsize), 424 SEEK_SET) == -1) 425 fatal("lseek to badsector area: %s", 426 strerror(errno)); 427 if (write(cfd, blk, lp->d_secsize) < lp->d_secsize) 428 fprintf(stderr, 429 "%s: alternate label %d write: %s\n", 430 progname, i/2, strerror(errno)); 431 } 432 close(cfd); 433 } 434 #endif /* vax */ 435 } 436 #endif /* notdef */ 437 438 void 439 usage() 440 { 441 fprintf(stderr, "usage: newfs_lfs [ -fsoptions ] special-device\n"); 442 fprintf(stderr, "where fsoptions are:\n"); 443 fprintf(stderr, "\t-A (autoconfigure segment size)\n"); 444 fprintf(stderr, "\t-B segment size in bytes\n"); 445 fprintf(stderr, "\t-D (debug)\n"); 446 fprintf(stderr, 447 "\t-N (do not create file system, just print out parameters)\n"); 448 fprintf(stderr, "\t-O first segment offset in sectors\n"); 449 fprintf(stderr, "\t-b block size in bytes\n"); 450 fprintf(stderr, "\t-f frag size in bytes\n"); 451 fprintf(stderr, "\t-m minimum free space %%\n"); 452 fprintf(stderr, "\t-s file system size in sectors\n"); 453 fprintf(stderr, "\t-v version\n"); 454 exit(1); 455 } 456
Indexes created Wed Oct 22 13:09:56 GMT 2025