1 /* $OpenBSD: newfs_ext2fs.c,v 1.27 2019/06/28 13:32:45 deraadt Exp $ */ 2 /* $NetBSD: newfs_ext2fs.c,v 1.8 2009/03/02 10:38:13 tsutsui Exp $ */ 3 4 /* 5 * Copyright (c) 1983, 1989, 1993, 1994 6 * The Regents of the University of California. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 /* 34 * newfs: friendly front end to mke2fs 35 */ 36 #include <sys/param.h> /* powerof2 */ 37 #include <sys/types.h> 38 #include <sys/ioctl.h> 39 #include <sys/dkio.h> 40 #include <sys/disklabel.h> 41 #include <sys/mount.h> 42 43 #include <ufs/ext2fs/ext2fs.h> 44 #include <ufs/ext2fs/ext2fs_dinode.h> 45 46 #include <ctype.h> 47 #include <err.h> 48 #include <errno.h> 49 #include <fcntl.h> 50 #include <inttypes.h> 51 #include <limits.h> 52 #include <paths.h> 53 #include <stdint.h> 54 #include <stdio.h> 55 #include <stdlib.h> 56 #include <string.h> 57 #include <unistd.h> 58 #include <util.h> 59 60 #define MINIMUM(a, b) (((a) < (b)) ? (a) : (b)) 61 62 #include "extern.h" 63 64 static int64_t strsuftoi64(const char *, const char *, int64_t, int64_t, int *); 65 static void usage(void) __dead; 66 67 /* 68 * For file systems smaller than SMALL_FSSIZE we use the S_DFL_* defaults, 69 * otherwise if less than MEDIUM_FSSIZE use M_DFL_*, otherwise use 70 * L_DFL_*. 71 */ 72 #define SMALL_FSSIZE ((4 * 1024 * 1024) / sectorsize) /* 4MB */ 73 #define S_DFL_BSIZE 1024 74 #define MEDIUM_FSSIZE ((512 * 1024 * 1024) / sectorsize) /* 512MB */ 75 #define M_DFL_BSIZE 1024 76 #define L_DFL_BSIZE 4096 77 78 /* 79 * Each file system has a number of inodes statically allocated. 80 * We allocate one inode slot per 2, 4, or 8 blocks, expecting this 81 * to be far more than we will ever need. 82 */ 83 #define S_DFL_NINODE(blocks) ((blocks) / 8) 84 #define M_DFL_NINODE(blocks) ((blocks) / 4) 85 #define L_DFL_NINODE(blocks) ((blocks) / 2) 86 87 /* 88 * Default sector size. 89 */ 90 #define DFL_SECSIZE 512 91 92 int Nflag; /* run without writing file system */ 93 int Oflag = 0; /* format as conservative REV0 by default */ 94 int verbosity; /* amount of printf() output */ 95 #define DEFAULT_VERBOSITY 4 /* 4 is traditional behavior of newfs(8) */ 96 int64_t fssize; /* file system size */ 97 uint sectorsize; /* bytes/sector */ 98 uint16_t inodesize = EXT2_REV0_DINODE_SIZE; /* inode size */ 99 uint fsize = 0; /* fragment size */ 100 uint bsize = 0; /* block size */ 101 uint minfree = MINFREE; /* free space threshold */ 102 uint density; /* number of bytes per inode */ 103 uint num_inodes; /* number of inodes (overrides density) */ 104 int max_cols; 105 char *volname = NULL; /* volume name */ 106 107 static char *disktype = NULL; 108 109 struct disklabel *getdisklabel(const char *, int); 110 struct partition *getpartition(int, const char *, char *[], struct disklabel **); 111 112 int 113 main(int argc, char *argv[]) 114 { 115 struct statfs *mp; 116 struct stat sb; 117 int ch, fd, len, n, Fflag, Iflag, Zflag; 118 char *s1, *s2, *special; 119 const char *opstring; 120 int byte_sized, fl; 121 uint blocks; /* number of blocks */ 122 struct partition *pp = NULL; 123 struct disklabel *lp; 124 struct winsize winsize; 125 126 /* Get terminal width */ 127 if (ioctl(fileno(stdout), TIOCGWINSZ, &winsize) == 0) 128 max_cols = winsize.ws_col; 129 else 130 max_cols = 80; 131 132 if (pledge("stdio rpath wpath cpath disklabel", NULL) == -1) 133 err(1, "pledge"); 134 135 Fflag = Iflag = Zflag = 0; 136 verbosity = -1; 137 opstring = "D:FINO:S:V:Zb:f:i:l:m:n:qs:t:v:"; 138 byte_sized = 0; 139 while ((ch = getopt(argc, argv, opstring)) != -1) 140 switch (ch) { 141 case 'D': 142 inodesize = (uint16_t)strtol(optarg, &s1, 0); 143 if (*s1 || (inodesize != 128 && inodesize != 256)) 144 errx(1, "Bad inode size %d " 145 "(only 128 and 256 supported)", inodesize); 146 break; 147 case 'F': 148 Fflag = 1; 149 break; 150 case 'I': 151 Iflag = 1; 152 break; 153 case 'N': 154 Nflag = 1; 155 if (verbosity == -1) 156 verbosity = DEFAULT_VERBOSITY; 157 break; 158 case 'O': 159 Oflag = strsuftoi64("format", optarg, 0, 1, NULL); 160 break; 161 case 'S': 162 /* 163 * XXX: 164 * non-512 byte sectors almost certainly don't work. 165 */ 166 sectorsize = strsuftoi64("sector size", 167 optarg, 512, 65536, NULL); 168 if (!powerof2(sectorsize)) 169 errx(EXIT_FAILURE, 170 "sector size `%s' is not a power of 2.", 171 optarg); 172 break; 173 case 'V': 174 verbosity = strsuftoi64("verbose", optarg, 0, 4, NULL); 175 break; 176 case 'Z': 177 Zflag = 1; 178 break; 179 case 'b': 180 bsize = strsuftoi64("block size", 181 optarg, MINBSIZE, EXT2_MAXBSIZE, NULL); 182 break; 183 case 'f': 184 fsize = strsuftoi64("fragment size", 185 optarg, MINBSIZE, EXT2_MAXBSIZE, NULL); 186 break; 187 case 'i': 188 density = strsuftoi64("bytes per inode", 189 optarg, 1, INT_MAX, NULL); 190 break; 191 case 'm': 192 minfree = strsuftoi64("free space %", 193 optarg, 0, 99, NULL); 194 break; 195 case 'n': 196 num_inodes = strsuftoi64("number of inodes", 197 optarg, 1, INT_MAX, NULL); 198 break; 199 case 'q': 200 verbosity = 1; 201 break; 202 case 's': 203 fssize = strsuftoi64("file system size", 204 optarg, INT64_MIN, INT64_MAX, &byte_sized); 205 break; 206 case 't': 207 /* compat with newfs -t */ 208 break; 209 case 'v': 210 volname = optarg; 211 if (volname[0] == '\0') 212 errx(EXIT_FAILURE, 213 "Volume name cannot be zero length"); 214 break; 215 case '?': 216 default: 217 usage(); 218 } 219 argc -= optind; 220 argv += optind; 221 222 if (verbosity == -1) 223 /* Default to showing cg info */ 224 verbosity = DEFAULT_VERBOSITY; 225 226 if (argc != 1) 227 usage(); 228 229 memset(&sb, 0, sizeof(sb)); 230 special = argv[0]; 231 fl = Nflag ? O_RDONLY : O_RDWR; 232 233 if (Fflag) { 234 /* 235 * It's a file system image 236 * no label, use fixed default for sectorsize. 237 */ 238 if (sectorsize == 0) 239 sectorsize = DFL_SECSIZE; 240 241 /* creating image in a regular file */ 242 if (!Nflag && fssize > 0) 243 fl |= O_CREAT; 244 fd = open(special, fl, 0666); 245 if (fd == -1) 246 err(EXIT_FAILURE, "can't open file %s", special); 247 if (fstat(fd, &sb) == -1) 248 err(EXIT_FAILURE, "can't fstat opened %s", special); 249 } else { /* !Fflag */ 250 fd = opendev(special, fl, 0, &special); 251 if (fd == -1 || fstat(fd, &sb) == -1) 252 err(EXIT_FAILURE, "%s: open", special); 253 254 if (!Nflag) { 255 /* Bail if target special is mounted */ 256 n = getmntinfo(&mp, MNT_NOWAIT); 257 if (n == 0) 258 err(EXIT_FAILURE, "%s: getmntinfo", special); 259 260 len = sizeof(_PATH_DEV) - 1; 261 s1 = special; 262 if (strncmp(_PATH_DEV, s1, len) == 0) 263 s1 += len; 264 265 while (--n >= 0) { 266 s2 = mp->f_mntfromname; 267 if (strncmp(_PATH_DEV, s2, len) == 0) { 268 s2 += len - 1; 269 *s2 = 'r'; 270 } 271 if (strcmp(s1, s2) == 0 || 272 strcmp(s1, &s2[1]) == 0) 273 errx(EXIT_FAILURE, 274 "%s is mounted on %s", 275 special, mp->f_mntonname); 276 ++mp; 277 } 278 } 279 280 pp = getpartition(fd, special, argv, &lp); 281 if (!Iflag) { 282 static const char m[] = 283 "%s partition type is not `%s' (or use -I)"; 284 if (pp->p_fstype != FS_EXT2FS) 285 errx(EXIT_FAILURE, m, special, "ext2fs"); 286 } 287 if (sectorsize == 0) { 288 sectorsize = lp->d_secsize; 289 if (sectorsize <= 0) 290 errx(EXIT_FAILURE, "no default sector size"); 291 } 292 } 293 294 if (byte_sized) 295 fssize /= sectorsize; 296 if (fssize <= 0) { 297 if (sb.st_size != 0) 298 fssize += sb.st_size / sectorsize; 299 else if (pp) 300 fssize += DL_GETPSIZE(pp); 301 if (fssize <= 0) 302 errx(EXIT_FAILURE, 303 "Unable to determine file system size"); 304 } 305 306 /* XXXLUKEM: only ftruncate() regular files ? (dsl: or at all?) */ 307 if (Fflag && !Nflag 308 && ftruncate(fd, (off_t)fssize * sectorsize) == -1) 309 err(1, "can't ftruncate %s to %" PRId64, special, fssize); 310 311 if (Zflag && !Nflag) { /* pre-zero (and de-sparce) the file */ 312 char *buf; 313 int bufsize, i; 314 off_t bufrem; 315 struct statfs sfs; 316 317 if (fstatfs(fd, &sfs) == -1) { 318 warn("can't fstatvfs `%s'", special); 319 bufsize = 8192; 320 } else 321 bufsize = sfs.f_iosize; 322 323 if ((buf = calloc(1, bufsize)) == NULL) 324 err(1, "can't allocate buffer of %d", 325 bufsize); 326 bufrem = fssize * sectorsize; 327 if (verbosity > 0) 328 printf("Creating file system image in `%s', " 329 "size %" PRId64 " bytes, in %d byte chunks.\n", 330 special, bufrem, bufsize); 331 while (bufrem > 0) { 332 i = write(fd, buf, MINIMUM(bufsize, bufrem)); 333 if (i == -1) 334 err(1, "writing image"); 335 bufrem -= i; 336 } 337 free(buf); 338 } 339 340 /* Sort out fragment and block sizes */ 341 if (bsize == 0) { 342 bsize = fsize; 343 if (bsize == 0) { 344 if (fssize < SMALL_FSSIZE) 345 bsize = S_DFL_BSIZE; 346 else if (fssize < MEDIUM_FSSIZE) 347 bsize = M_DFL_BSIZE; 348 else 349 bsize = L_DFL_BSIZE; 350 } 351 } 352 if (fsize == 0) 353 fsize = bsize; 354 355 blocks = fssize * sectorsize / bsize; 356 357 if (num_inodes == 0) { 358 if (density != 0) 359 num_inodes = fssize / density; 360 else { 361 if (fssize < SMALL_FSSIZE) 362 num_inodes = S_DFL_NINODE(blocks); 363 else if (fssize < MEDIUM_FSSIZE) 364 num_inodes = M_DFL_NINODE(blocks); 365 else 366 num_inodes = L_DFL_NINODE(blocks); 367 } 368 } 369 mke2fs(special, fd); 370 371 close(fd); 372 exit(EXIT_SUCCESS); 373 } 374 375 static int64_t 376 strsuftoi64(const char *desc, const char *arg, int64_t min, int64_t max, 377 int *num_suffix) 378 { 379 int64_t result, r1; 380 int shift = 0; 381 char *ep; 382 383 errno = 0; 384 r1 = strtoll(arg, &ep, 10); 385 if (ep[0] != '\0' && ep[1] != '\0') 386 errx(EXIT_FAILURE, 387 "%s `%s' is not a valid number.", desc, arg); 388 switch (ep[0]) { 389 case '\0': 390 case 's': 391 case 'S': 392 if (num_suffix != NULL) 393 *num_suffix = 0; 394 break; 395 case 'g': 396 case 'G': 397 shift += 10; 398 /* FALLTHROUGH */ 399 case 'm': 400 case 'M': 401 shift += 10; 402 /* FALLTHROUGH */ 403 case 'k': 404 case 'K': 405 shift += 10; 406 /* FALLTHROUGH */ 407 case 'b': 408 case 'B': 409 if (num_suffix != NULL) 410 *num_suffix = 1; 411 break; 412 default: 413 errx(EXIT_FAILURE, 414 "`%s' is not a valid suffix for %s.", ep, desc); 415 } 416 result = r1 << shift; 417 if (errno == ERANGE || result >> shift != r1) 418 errx(EXIT_FAILURE, 419 "%s `%s' is too large to convert.", desc, arg); 420 if (result < min) 421 errx(EXIT_FAILURE, 422 "%s `%s' (%" PRId64 ") is less than the minimum (%" 423 PRId64 ").", desc, arg, result, min); 424 if (result > max) 425 errx(EXIT_FAILURE, 426 "%s `%s' (%" PRId64 ") is greater than the maximum (%" 427 PRId64 ").", desc, arg, result, max); 428 return result; 429 } 430 431 static const char help_strings[] = 432 "\t-b bsize\tblock size\n" 433 "\t-D inodesize\tsize of an inode in bytes (128 or 256)\n" 434 "\t-F \t\tcreate file system image in regular file\n" 435 "\t-f fsize\tfragment size\n" 436 "\t-I \t\tdo not check that the file system type is `ext2fs'\n" 437 "\t-i density\tnumber of bytes per inode\n" 438 "\t-m minfree\tminimum free space %\n" 439 "\t-N \t\tdo not create file system, just print out parameters\n" 440 "\t-n inodes\tnumber of inodes (overrides -i density)\n" 441 "\t-O N\t\tfilesystem revision: 0 ==> REV0, 1 ==> REV1 (default 0)\n" 442 "\t-S secsize\tsector size\n" 443 "\t-s fssize\tfile system size (sectors)\n" 444 "\t-V verbose\toutput verbosity: 0 ==> none, 4 ==> max\n" 445 "\t-v volname\text2fs volume name\n" 446 "\t-Z \t\tpre-zero the image file\n"; 447 448 static void 449 usage(void) 450 { 451 452 extern char *__progname; 453 454 fprintf(stderr, 455 "usage: %s [ fsoptions ] special-device\n", __progname); 456 fprintf(stderr, "where fsoptions are:\n"); 457 fprintf(stderr, "%s", help_strings); 458 459 exit(EXIT_FAILURE); 460 } 461 462 struct disklabel * 463 getdisklabel(const char *s, int fd) 464 { 465 static struct disklabel lab; 466 467 if (ioctl(fd, DIOCGDINFO, (char *)&lab) == -1) { 468 if (disktype != NULL) { 469 struct disklabel *lp; 470 471 //unlabeled++; 472 lp = getdiskbyname(disktype); 473 if (lp == NULL) 474 errx(EXIT_FAILURE, "%s: unknown disk type", 475 disktype); 476 return (lp); 477 } 478 warn("ioctl (GDINFO)"); 479 errx(EXIT_FAILURE, 480 "%s: can't read disk label; disk type must be specified", 481 s); 482 } 483 return (&lab); 484 } 485 486 struct partition * 487 getpartition(int fsi, const char *special, char *argv[], struct disklabel **dl) 488 { 489 struct stat st; 490 const char *cp; 491 struct disklabel *lp; 492 struct partition *pp; 493 494 if (fstat(fsi, &st) == -1) 495 err(EXIT_FAILURE, "%s", special); 496 if (S_ISBLK(st.st_mode)) 497 errx(EXIT_FAILURE, "%s: block device", special); 498 if (!S_ISCHR(st.st_mode)) 499 warnx("%s: not a character-special device", special); 500 if (*argv[0] == '\0') 501 errx(EXIT_FAILURE, "empty partition name supplied"); 502 cp = argv[0] + strlen(argv[0]) - 1; 503 if ((*cp < 'a' || *cp > ('a' + getmaxpartitions() - 1)) 504 && !isdigit((unsigned char)*cp)) 505 errx(EXIT_FAILURE, "%s: can't figure out file system partition", argv[0]); 506 lp = getdisklabel(special, fsi); 507 if (isdigit((unsigned char)*cp)) 508 pp = &lp->d_partitions[0]; 509 else 510 pp = &lp->d_partitions[*cp - 'a']; 511 if (DL_GETPSIZE(pp) == 0) 512 errx(EXIT_FAILURE, "%s: `%c' partition is unavailable", argv[0], *cp); 513 *dl = lp; 514 return pp; 515 } 516 517