1 /* 2 * Copyright (c) 1987, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Symmetric Computer Systems. 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 * 4. 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 * @(#) Copyright (c) 1987, 1993 The Regents of the University of California. All rights reserved. 33 * @(#)disklabel.c 1.2 (Symmetric) 11/28/85 34 * @(#)disklabel.c 8.2 (Berkeley) 1/7/94 35 * $FreeBSD: src/sbin/disklabel/disklabel.c,v 1.28.2.15 2003/01/24 16:18:16 des Exp $ 36 */ 37 38 #include <sys/param.h> 39 #include <sys/file.h> 40 #include <sys/stat.h> 41 #include <sys/wait.h> 42 #define DKTYPENAMES 43 #include <sys/disklabel32.h> 44 #include <sys/disklabel64.h> 45 #include <sys/diskslice.h> 46 #include <sys/diskmbr.h> 47 #include <sys/dtype.h> 48 #include <sys/sysctl.h> 49 #include <disktab.h> 50 #include <fstab.h> 51 52 #include <vfs/ufs/dinode.h> 53 #include <vfs/ufs/fs.h> 54 55 #include <unistd.h> 56 #include <string.h> 57 #include <stdio.h> 58 #include <stdlib.h> 59 #include <signal.h> 60 #include <stdarg.h> 61 #include <ctype.h> 62 #include <err.h> 63 #include <errno.h> 64 #include "pathnames.h" 65 66 /* 67 * Disklabel32: read and write 32 bit disklabels. 68 * The label is usually placed on one of the first sectors of the disk. 69 * Many machines also place a bootstrap in the same area, 70 * in which case the label is embedded in the bootstrap. 71 * The bootstrap source must leave space at the proper offset 72 * for the label on such machines. 73 */ 74 75 #ifndef BBSIZE 76 #define BBSIZE 8192 /* size of boot area, with label */ 77 #endif 78 79 /* FIX! These are too low, but are traditional */ 80 #define DEFAULT_NEWFS_BLOCK 8192U 81 #define DEFAULT_NEWFS_FRAG 1024U 82 #define DEFAULT_NEWFS_CPG 16U 83 84 #define BIG_NEWFS_BLOCK 16384U 85 #define BIG_NEWFS_FRAG 2048U 86 #define BIG_NEWFS_CPG 64U 87 88 #define NUMBOOT 2 89 90 void makelabel(const char *, const char *, struct disklabel32 *); 91 int writelabel(int, const char *, struct disklabel32 *); 92 void l_perror(const char *); 93 struct disklabel32 *readlabel(int); 94 struct disklabel32 *makebootarea(char *, struct disklabel32 *, int); 95 void display(FILE *, const struct disklabel32 *); 96 int edit(struct disklabel32 *, int); 97 int editit(void); 98 char *skip(char *); 99 char *word(char *); 100 int getasciilabel(FILE *, struct disklabel32 *); 101 int getasciipartspec(char *, struct disklabel32 *, int, int); 102 int checklabel(struct disklabel32 *); 103 void setbootflag(struct disklabel32 *); 104 void Warning(const char *, ...) __printflike(1, 2); 105 void usage(void); 106 int checkoldboot(int, const char *); 107 const char *fixlabel(int, struct disklabel32 *, int); 108 struct disklabel32 *getvirginlabel(void); 109 struct disklabel32 *getdisklabelfromdisktab(const char *name); 110 111 #define DEFEDITOR _PATH_VI 112 #define streq(a,b) (strcmp(a,b) == 0) 113 114 char *dkname; 115 char *specname; 116 char tmpfil[] = PATH_TMPFILE; 117 118 char namebuf[BBSIZE]; 119 struct disklabel32 lab; 120 char bootarea[BBSIZE]; 121 122 #define MAX_PART ('z') 123 #define MAX_NUM_PARTS (1 + MAX_PART - 'a') 124 char part_size_type[MAX_NUM_PARTS]; 125 char part_offset_type[MAX_NUM_PARTS]; 126 int part_set[MAX_NUM_PARTS]; 127 128 #if NUMBOOT > 0 129 int installboot; /* non-zero if we should install a boot program */ 130 char *bootbuf; /* pointer to buffer with remainder of boot prog */ 131 int bootsize; /* size of remaining boot program */ 132 char *xxboot; /* primary boot */ 133 char *bootxx; /* secondary boot */ 134 char boot0[MAXPATHLEN]; 135 char boot1[MAXPATHLEN]; 136 #endif 137 138 enum { 139 UNSPEC, EDIT, NOWRITE, READ, RESTORE, WRITE, WRITEABLE, WRITEBOOT 140 } op = UNSPEC; 141 142 int rflag; 143 int disable_write; /* set to disable writing to disk label */ 144 int forceflag; 145 u_int32_t slice_start_lba; 146 147 #ifdef DEBUG 148 int debug; 149 #define OPTIONS "BNRWb:def:nrs:w" 150 #else 151 #define OPTIONS "BNRWb:ef:nrs:w" 152 #endif 153 154 int 155 main(int argc, char *argv[]) 156 { 157 struct disklabel32 *lp; 158 FILE *t; 159 int ch, f = 0, flag, error = 0; 160 char *name = NULL; 161 162 while ((ch = getopt(argc, argv, OPTIONS)) != -1) 163 switch (ch) { 164 #if NUMBOOT > 0 165 case 'B': 166 ++installboot; 167 break; 168 case 'b': 169 xxboot = optarg; 170 break; 171 172 case 'f': 173 forceflag = 1; 174 slice_start_lba = strtoul(optarg, NULL, 0); 175 break; 176 #if NUMBOOT > 1 177 case 's': 178 bootxx = optarg; 179 break; 180 #endif 181 #endif 182 case 'N': 183 if (op != UNSPEC) 184 usage(); 185 op = NOWRITE; 186 break; 187 case 'n': 188 disable_write = 1; 189 break; 190 case 'R': 191 if (op != UNSPEC) 192 usage(); 193 op = RESTORE; 194 break; 195 case 'W': 196 if (op != UNSPEC) 197 usage(); 198 op = WRITEABLE; 199 break; 200 case 'e': 201 if (op != UNSPEC) 202 usage(); 203 op = EDIT; 204 break; 205 case 'r': 206 ++rflag; 207 break; 208 case 'w': 209 if (op != UNSPEC) 210 usage(); 211 op = WRITE; 212 break; 213 #ifdef DEBUG 214 case 'd': 215 debug++; 216 break; 217 #endif 218 case '?': 219 default: 220 usage(); 221 } 222 argc -= optind; 223 argv += optind; 224 #if NUMBOOT > 0 225 if (installboot) { 226 rflag++; 227 if (op == UNSPEC) 228 op = WRITEBOOT; 229 } else { 230 if (op == UNSPEC) 231 op = READ; 232 xxboot = bootxx = NULL; 233 } 234 #else 235 if (op == UNSPEC) 236 op = READ; 237 #endif 238 if (argc < 1) 239 usage(); 240 241 dkname = getdevpath(argv[0], 0); 242 specname = dkname; 243 f = open(specname, op == READ ? O_RDONLY : O_RDWR); 244 if (f < 0) 245 err(4, "%s", specname); 246 247 switch(op) { 248 249 case UNSPEC: 250 break; 251 252 case EDIT: 253 if (argc != 1) 254 usage(); 255 lp = readlabel(f); 256 error = edit(lp, f); 257 break; 258 259 case NOWRITE: 260 flag = 0; 261 if (ioctl(f, DIOCWLABEL, (char *)&flag) < 0) 262 err(4, "ioctl DIOCWLABEL"); 263 break; 264 265 case READ: 266 if (argc != 1) 267 usage(); 268 lp = readlabel(f); 269 display(stdout, lp); 270 error = checklabel(lp); 271 if (checkoldboot(f, NULL)) 272 warnx("Warning, old bootblocks detected, install new bootblocks & reinstall the disklabel"); 273 break; 274 275 case RESTORE: 276 #if NUMBOOT > 0 277 if (installboot && argc == 3) { 278 makelabel(argv[2], 0, &lab); 279 argc--; 280 281 /* 282 * We only called makelabel() for its side effect 283 * of setting the bootstrap file names. Discard 284 * all changes to `lab' so that all values in the 285 * final label come from the ASCII label. 286 */ 287 bzero((char *)&lab, sizeof(lab)); 288 } 289 #endif 290 if (argc != 2) 291 usage(); 292 if (!(t = fopen(argv[1], "r"))) 293 err(4, "%s", argv[1]); 294 if (!getasciilabel(t, &lab)) 295 exit(1); 296 lp = makebootarea(bootarea, &lab, f); 297 *lp = lab; 298 error = writelabel(f, bootarea, lp); 299 break; 300 301 case WRITE: 302 if (argc == 3) { 303 name = argv[2]; 304 argc--; 305 } 306 if (argc != 2) 307 usage(); 308 makelabel(argv[1], name, &lab); 309 lp = makebootarea(bootarea, &lab, f); 310 *lp = lab; 311 if (checklabel(lp) == 0) 312 error = writelabel(f, bootarea, lp); 313 break; 314 315 case WRITEABLE: 316 flag = 1; 317 if (ioctl(f, DIOCWLABEL, (char *)&flag) < 0) 318 err(4, "ioctl DIOCWLABEL"); 319 break; 320 321 #if NUMBOOT > 0 322 case WRITEBOOT: 323 { 324 struct disklabel32 tlab; 325 326 lp = readlabel(f); 327 tlab = *lp; 328 if (argc == 2) 329 makelabel(argv[1], 0, &lab); 330 lp = makebootarea(bootarea, &lab, f); 331 *lp = tlab; 332 if (checklabel(lp) == 0) 333 error = writelabel(f, bootarea, lp); 334 break; 335 } 336 #endif 337 } 338 exit(error); 339 } 340 341 /* 342 * Construct a prototype disklabel from /etc/disktab. As a side 343 * effect, set the names of the primary and secondary boot files 344 * if specified. 345 */ 346 void 347 makelabel(const char *type, const char *name, struct disklabel32 *lp) 348 { 349 struct disklabel32 *dp; 350 351 if (strcmp(type, "auto") == 0) 352 dp = getvirginlabel(); 353 else 354 dp = getdisklabelfromdisktab(type); 355 if (dp == NULL) 356 errx(1, "%s: unknown disk type", type); 357 *lp = *dp; 358 359 /* 360 * NOTE: boot control files may no longer be specified in disktab. 361 */ 362 if (name) 363 strncpy(lp->d_packname, name, sizeof(lp->d_packname)); 364 } 365 366 int 367 writelabel(int f, const char *boot, struct disklabel32 *lp) 368 { 369 const char *msg; 370 int flag; 371 int r; 372 373 if (disable_write) { 374 Warning("write to disk label suppressed - label was as follows:"); 375 display(stdout, lp); 376 return (0); 377 } else { 378 /* make sure we are not overwriting our boot code */ 379 if (checkoldboot(f, boot)) 380 errx(4, "Will not overwrite old bootblocks w/ label, install new boot blocks first!"); 381 setbootflag(lp); 382 lp->d_magic = DISKMAGIC32; 383 lp->d_magic2 = DISKMAGIC32; 384 lp->d_checksum = 0; 385 lp->d_checksum = dkcksum32(lp); 386 if (rflag) { 387 /* 388 * First set the kernel disk label, 389 * then write a label to the raw disk. 390 * If the SDINFO ioctl fails because it is unimplemented, 391 * keep going; otherwise, the kernel consistency checks 392 * may prevent us from changing the current (in-core) 393 * label. 394 */ 395 if (ioctl(f, DIOCSDINFO32, lp) < 0 && 396 errno != ENODEV && errno != ENOTTY) { 397 l_perror("ioctl DIOCSDINFO32"); 398 return (1); 399 } 400 lseek(f, (off_t)0, SEEK_SET); 401 402 /* 403 * write enable label sector before write 404 * (if necessary), disable after writing. 405 */ 406 flag = 1; 407 if (ioctl(f, DIOCWLABEL, &flag) < 0) 408 warn("ioctl DIOCWLABEL"); 409 msg = fixlabel(f, lp, 1); 410 if (msg) { 411 warn(msg); 412 return (1); 413 } 414 r = write(f, boot, lp->d_bbsize); 415 fixlabel(f, lp, 0); 416 if (r != ((ssize_t)lp->d_bbsize)) { 417 warn("write"); 418 return (1); 419 } 420 #if NUMBOOT > 0 421 /* 422 * Output the remainder of the disklabel 423 */ 424 if (bootbuf) { 425 fixlabel(f, lp, 1); 426 r = write(f, bootbuf, bootsize); 427 fixlabel(f, lp, 0); 428 if (r != bootsize) { 429 warn("write"); 430 return(1); 431 } 432 } 433 #endif 434 flag = 0; 435 ioctl(f, DIOCWLABEL, &flag); 436 } else if (ioctl(f, DIOCWDINFO32, lp) < 0) { 437 l_perror("ioctl DIOCWDINFO32"); 438 return (1); 439 } 440 } 441 return (0); 442 } 443 444 void 445 l_perror(const char *s) 446 { 447 switch (errno) { 448 449 case ESRCH: 450 warnx("%s: no disk label on disk;", s); 451 fprintf(stderr, "add \"-r\" to install initial label\n"); 452 break; 453 454 case EINVAL: 455 warnx("%s: label magic number or checksum is wrong!", s); 456 fprintf(stderr, "(disklabel or kernel is out of date?)\n"); 457 break; 458 459 case EBUSY: 460 warnx("%s: open partition would move or shrink", s); 461 break; 462 463 case EXDEV: 464 warnx("%s: '%c' partition must start at beginning of disk", 465 s, 'a' + RAW_PART); 466 break; 467 468 case ENOATTR: 469 warnx("%s: the disk already has a label of a different type,\n" 470 "probably a 64 bit disklabel. It must be cleaned out " 471 "first.\n", s); 472 break; 473 474 default: 475 warn(NULL); 476 break; 477 } 478 } 479 480 /* 481 * Fetch disklabel for disk. 482 * Use ioctl to get label unless -r flag is given. 483 */ 484 struct disklabel32 * 485 readlabel(int f) 486 { 487 const char *msg; 488 struct disklabel32 *lp; 489 int r; 490 491 if (rflag) { 492 r = read(f, bootarea, BBSIZE); 493 if (r < BBSIZE) 494 err(4, "%s", specname); 495 for (lp = (struct disklabel32 *)bootarea; 496 lp <= (struct disklabel32 *)(bootarea + BBSIZE - sizeof(*lp)); 497 lp = (struct disklabel32 *)((char *)lp + 16)) { 498 if (lp->d_magic == DISKMAGIC32 && 499 lp->d_magic2 == DISKMAGIC32) 500 break; 501 } 502 if (lp > (struct disklabel32 *)(bootarea+BBSIZE-sizeof(*lp)) || 503 lp->d_magic != DISKMAGIC32 || lp->d_magic2 != DISKMAGIC32 || 504 dkcksum32(lp) != 0) { 505 errx(1, "bad pack magic number (label is damaged, " 506 "or pack is unlabeled)"); 507 } 508 if ((msg = fixlabel(f, lp, 0)) != NULL) 509 errx(1, msg); 510 } else { 511 lp = &lab; 512 if (ioctl(f, DIOCGDINFO32, lp) < 0) { 513 l_perror("ioctl DIOCGDINFO32"); 514 exit(4); 515 } 516 } 517 return (lp); 518 } 519 520 /* 521 * Construct a bootarea (d_bbsize bytes) in the specified buffer ``boot'' 522 * Returns a pointer to the disklabel portion of the bootarea. 523 */ 524 struct disklabel32 * 525 makebootarea(char *boot, struct disklabel32 *dp, int f) 526 { 527 struct disklabel32 *lp; 528 char *p; 529 int b; 530 #if NUMBOOT > 0 531 struct stat sb; 532 #endif 533 #ifdef __i386__ 534 char *tmpbuf; 535 unsigned int i, found; 536 #endif 537 538 /* XXX */ 539 if (dp->d_secsize == 0) { 540 dp->d_secsize = DEV_BSIZE; 541 dp->d_bbsize = BBSIZE; 542 } 543 lp = (struct disklabel32 *) 544 (boot + (LABELSECTOR32 * dp->d_secsize) + LABELOFFSET32); 545 bzero((char *)lp, sizeof *lp); 546 #if NUMBOOT > 0 547 /* 548 * If we are not installing a boot program but we are installing a 549 * label on disk then we must read the current bootarea so we don't 550 * clobber the existing boot. 551 */ 552 if (!installboot) { 553 if (rflag) { 554 if (read(f, boot, BBSIZE) < BBSIZE) 555 err(4, "%s", specname); 556 bzero((char *)lp, sizeof *lp); 557 } 558 return (lp); 559 } 560 /* 561 * We are installing a boot program. Determine the name(s) and 562 * read them into the appropriate places in the boot area. 563 */ 564 if (!xxboot || !bootxx) { 565 if (!xxboot) { 566 sprintf(boot0, "%s/boot1", _PATH_BOOTDIR); 567 xxboot = boot0; 568 } 569 #if NUMBOOT > 1 570 if (!bootxx) { 571 sprintf(boot1, "%s/boot2", _PATH_BOOTDIR); 572 bootxx = boot1; 573 } 574 #endif 575 } 576 #ifdef DEBUG 577 if (debug) 578 fprintf(stderr, "bootstraps: xxboot = %s, bootxx = %s\n", 579 xxboot, bootxx ? bootxx : "NONE"); 580 #endif 581 582 /* 583 * Strange rules: 584 * 1. One-piece bootstrap (hp300/hp800) 585 * up to d_bbsize bytes of ``xxboot'' go in bootarea, the rest 586 * is remembered and written later following the bootarea. 587 * 2. Two-piece bootstraps (vax/i386?/mips?) 588 * up to d_secsize bytes of ``xxboot'' go in first d_secsize 589 * bytes of bootarea, remaining d_bbsize-d_secsize filled 590 * from ``bootxx''. 591 */ 592 b = open(xxboot, O_RDONLY); 593 if (b < 0) 594 err(4, "%s", xxboot); 595 #if NUMBOOT > 1 596 #ifdef __i386__ 597 /* 598 * XXX Botch alert. 599 * The i386 has the so-called fdisk table embedded into the 600 * primary bootstrap. We take care to not clobber it, but 601 * only if it does already contain some data. (Otherwise, 602 * the xxboot provides a template.) 603 */ 604 if ((tmpbuf = (char *)malloc((int)dp->d_secsize)) == NULL) 605 err(4, "%s", xxboot); 606 memcpy((void *)tmpbuf, (void *)boot, (int)dp->d_secsize); 607 #endif /* i386 */ 608 if (read(b, boot, (int)dp->d_secsize) < 0) 609 err(4, "%s", xxboot); 610 close(b); 611 #ifdef __i386__ 612 for (i = DOSPARTOFF, found = 0; 613 !found && i < DOSPARTOFF + NDOSPART*sizeof(struct dos_partition); 614 i++) 615 found = tmpbuf[i] != 0; 616 if (found) 617 memcpy((void *)&boot[DOSPARTOFF], 618 (void *)&tmpbuf[DOSPARTOFF], 619 NDOSPART * sizeof(struct dos_partition)); 620 free(tmpbuf); 621 #endif /* i386 */ 622 b = open(bootxx, O_RDONLY); 623 if (b < 0) 624 err(4, "%s", bootxx); 625 if (fstat(b, &sb) != 0) 626 err(4, "%s", bootxx); 627 if (dp->d_secsize + sb.st_size > dp->d_bbsize) 628 errx(4, "%s too large", bootxx); 629 if (read(b, &boot[dp->d_secsize], 630 (int)(dp->d_bbsize-dp->d_secsize)) < 0) 631 err(4, "%s", bootxx); 632 #else /* !(NUMBOOT > 1) */ 633 if (read(b, boot, (int)dp->d_bbsize) < 0) 634 err(4, "%s", xxboot); 635 if (fstat(b, &sb) != 0) 636 err(4, "%s", xxboot); 637 bootsize = (int)sb.st_size - dp->d_bbsize; 638 if (bootsize > 0) { 639 /* XXX assume d_secsize is a power of two */ 640 bootsize = (bootsize + dp->d_secsize-1) & ~(dp->d_secsize-1); 641 bootbuf = (char *)malloc((size_t)bootsize); 642 if (bootbuf == NULL) 643 err(4, "%s", xxboot); 644 if (read(b, bootbuf, bootsize) < 0) { 645 free(bootbuf); 646 err(4, "%s", xxboot); 647 } 648 } 649 #endif /* NUMBOOT > 1 */ 650 close(b); 651 #endif /* NUMBOOT > 0 */ 652 /* 653 * Make sure no part of the bootstrap is written in the area 654 * reserved for the label. 655 */ 656 for (p = (char *)lp; p < (char *)lp + sizeof(struct disklabel32); p++) 657 if (*p) 658 errx(2, "bootstrap doesn't leave room for disk label"); 659 return (lp); 660 } 661 662 void 663 display(FILE *f, const struct disklabel32 *lp) 664 { 665 int i, j; 666 const struct partition32 *pp; 667 668 fprintf(f, "# %s:\n", specname); 669 if (lp->d_type < DKMAXTYPES) 670 fprintf(f, "type: %s\n", dktypenames[lp->d_type]); 671 else 672 fprintf(f, "type: %u\n", lp->d_type); 673 fprintf(f, "disk: %.*s\n", (int)sizeof(lp->d_typename), 674 lp->d_typename); 675 fprintf(f, "label: %.*s\n", (int)sizeof(lp->d_packname), 676 lp->d_packname); 677 fprintf(f, "flags:"); 678 fprintf(f, "\n"); 679 fprintf(f, "bytes/sector: %lu\n", (u_long)lp->d_secsize); 680 fprintf(f, "sectors/track: %lu\n", (u_long)lp->d_nsectors); 681 fprintf(f, "tracks/cylinder: %lu\n", (u_long)lp->d_ntracks); 682 fprintf(f, "sectors/cylinder: %lu\n", (u_long)lp->d_secpercyl); 683 fprintf(f, "cylinders: %lu\n", (u_long)lp->d_ncylinders); 684 fprintf(f, "sectors/unit: %lu\n", (u_long)lp->d_secperunit); 685 fprintf(f, "rpm: %u\n", lp->d_rpm); 686 fprintf(f, "interleave: %u\n", lp->d_interleave); 687 fprintf(f, "trackskew: %u\n", lp->d_trackskew); 688 fprintf(f, "cylinderskew: %u\n", lp->d_cylskew); 689 fprintf(f, "headswitch: %lu\t\t# milliseconds\n", 690 (u_long)lp->d_headswitch); 691 fprintf(f, "track-to-track seek: %ld\t# milliseconds\n", 692 (u_long)lp->d_trkseek); 693 fprintf(f, "drivedata: "); 694 for (i = NDDATA32 - 1; i >= 0; i--) { 695 if (lp->d_drivedata[i]) 696 break; 697 } 698 if (i < 0) 699 i = 0; 700 for (j = 0; j <= i; j++) 701 fprintf(f, "%lu ", (u_long)lp->d_drivedata[j]); 702 fprintf(f, "\n\n%u partitions:\n", lp->d_npartitions); 703 fprintf(f, 704 "# size offset fstype\n"); 705 pp = lp->d_partitions; 706 for (i = 0; i < lp->d_npartitions; i++, pp++) { 707 if (pp->p_size) { 708 u_long onemeg = 1024 * 1024 / lp->d_secsize; 709 fprintf(f, " %c: ", 'a' + i); 710 711 fprintf(f, "%10lu ", (u_long)pp->p_size); 712 fprintf(f, "%10lu ", (u_long)pp->p_offset); 713 if (pp->p_fstype < FSMAXTYPES) 714 fprintf(f, "%8.8s", fstypenames[pp->p_fstype]); 715 else 716 fprintf(f, "%8d", pp->p_fstype); 717 718 fprintf(f, "\t# %11.3fMB", (double)pp->p_size / onemeg); 719 fprintf(f, "\n"); 720 } 721 } 722 fflush(f); 723 } 724 725 int 726 edit(struct disklabel32 *lp, int f) 727 { 728 int c, fd; 729 struct disklabel32 label; 730 FILE *fp; 731 732 if ((fd = mkstemp(tmpfil)) == -1 || 733 (fp = fdopen(fd, "w")) == NULL) { 734 warnx("can't create %s", tmpfil); 735 return (1); 736 } 737 display(fp, lp); 738 fclose(fp); 739 for (;;) { 740 if (!editit()) 741 break; 742 fp = fopen(tmpfil, "r"); 743 if (fp == NULL) { 744 warnx("can't reopen %s for reading", tmpfil); 745 break; 746 } 747 bzero((char *)&label, sizeof(label)); 748 if (getasciilabel(fp, &label)) { 749 *lp = label; 750 if (writelabel(f, bootarea, lp) == 0) { 751 fclose(fp); 752 unlink(tmpfil); 753 return (0); 754 } 755 } 756 fclose(fp); 757 printf("re-edit the label? [y]: "); fflush(stdout); 758 c = getchar(); 759 if (c != EOF && c != (int)'\n') 760 while (getchar() != (int)'\n') 761 ; 762 if (c == (int)'n') 763 break; 764 } 765 unlink(tmpfil); 766 return (1); 767 } 768 769 int 770 editit(void) 771 { 772 int pid, xpid; 773 int status, omask; 774 const char *ed; 775 776 omask = sigblock(sigmask(SIGINT)|sigmask(SIGQUIT)|sigmask(SIGHUP)); 777 while ((pid = fork()) < 0) { 778 if (errno == EPROCLIM) { 779 warnx("you have too many processes"); 780 return(0); 781 } 782 if (errno != EAGAIN) { 783 warn("fork"); 784 return(0); 785 } 786 sleep(1); 787 } 788 if (pid == 0) { 789 sigsetmask(omask); 790 setgid(getgid()); 791 setuid(getuid()); 792 if ((ed = getenv("EDITOR")) == NULL) 793 ed = DEFEDITOR; 794 execlp(ed, ed, tmpfil, NULL); 795 err(1, "%s", ed); 796 } 797 while ((xpid = wait(&status)) >= 0) 798 if (xpid == pid) 799 break; 800 sigsetmask(omask); 801 return(!status); 802 } 803 804 char * 805 skip(char *cp) 806 { 807 808 while (*cp != '\0' && isspace(*cp)) 809 cp++; 810 if (*cp == '\0' || *cp == '#') 811 return (NULL); 812 return (cp); 813 } 814 815 char * 816 word(char *cp) 817 { 818 char c; 819 820 while (*cp != '\0' && !isspace(*cp) && *cp != '#') 821 cp++; 822 if ((c = *cp) != '\0') { 823 *cp++ = '\0'; 824 if (c != '#') 825 return (skip(cp)); 826 } 827 return (NULL); 828 } 829 830 /* 831 * Read an ascii label in from fd f, 832 * in the same format as that put out by display(), 833 * and fill in lp. 834 */ 835 int 836 getasciilabel(FILE *f, struct disklabel32 *lp) 837 { 838 char *cp; 839 const char **cpp; 840 u_int part; 841 char *tp, line[BUFSIZ]; 842 u_long v; 843 int lineno = 0, errors = 0; 844 int i; 845 char empty[] = ""; 846 char unknown[] = "unknown"; 847 848 bzero(&part_set, sizeof(part_set)); 849 bzero(&part_size_type, sizeof(part_size_type)); 850 bzero(&part_offset_type, sizeof(part_offset_type)); 851 lp->d_bbsize = BBSIZE; /* XXX */ 852 lp->d_sbsize = SBSIZE; /* XXX */ 853 while (fgets(line, sizeof(line) - 1, f)) { 854 lineno++; 855 if ((cp = strchr(line,'\n')) != NULL) 856 *cp = '\0'; 857 cp = skip(line); 858 if (cp == NULL) 859 continue; 860 tp = strchr(cp, ':'); 861 if (tp == NULL) { 862 fprintf(stderr, "line %d: syntax error\n", lineno); 863 errors++; 864 continue; 865 } 866 *tp++ = '\0', tp = skip(tp); 867 if (streq(cp, "type")) { 868 if (tp == NULL) 869 tp = unknown; 870 cpp = dktypenames; 871 for (; cpp < &dktypenames[DKMAXTYPES]; cpp++) { 872 if (*cpp && strcasecmp(*cpp, tp) == 0) { 873 lp->d_type = cpp - dktypenames; 874 break; 875 } 876 } 877 if (cpp < &dktypenames[DKMAXTYPES]) 878 continue; 879 v = strtoul(tp, NULL, 10); 880 if (v >= DKMAXTYPES) { 881 fprintf(stderr, "line %d:%s %lu\n", lineno, 882 "Warning, unknown disk type", v); 883 } 884 lp->d_type = v; 885 continue; 886 } 887 if (streq(cp, "flags")) { 888 for (v = 0; (cp = tp) && *cp != '\0';) { 889 tp = word(cp); 890 if (streq(cp, "removeable")) 891 v |= 0; /* obsolete */ 892 else if (streq(cp, "ecc")) 893 v |= 0; /* obsolete */ 894 else if (streq(cp, "badsect")) 895 v |= 0; /* obsolete */ 896 else { 897 fprintf(stderr, 898 "line %d: %s: bad flag\n", 899 lineno, cp); 900 errors++; 901 } 902 } 903 lp->d_flags = v; 904 continue; 905 } 906 if (streq(cp, "drivedata")) { 907 for (i = 0; (cp = tp) && *cp != '\0' && i < NDDATA32;) { 908 lp->d_drivedata[i++] = strtoul(cp, NULL, 10); 909 tp = word(cp); 910 } 911 continue; 912 } 913 if (sscanf(cp, "%lu partitions", &v) == 1) { 914 if (v == 0 || v > MAXPARTITIONS32) { 915 fprintf(stderr, 916 "line %d: bad # of partitions\n", lineno); 917 lp->d_npartitions = MAXPARTITIONS32; 918 errors++; 919 } else 920 lp->d_npartitions = v; 921 continue; 922 } 923 if (tp == NULL) 924 tp = empty; 925 if (streq(cp, "disk")) { 926 strncpy(lp->d_typename, tp, sizeof (lp->d_typename)); 927 continue; 928 } 929 if (streq(cp, "label")) { 930 strncpy(lp->d_packname, tp, sizeof (lp->d_packname)); 931 continue; 932 } 933 if (streq(cp, "bytes/sector")) { 934 v = strtoul(tp, NULL, 10); 935 if (v == 0 || (v % DEV_BSIZE) != 0) { 936 fprintf(stderr, 937 "line %d: %s: bad sector size\n", 938 lineno, tp); 939 errors++; 940 } else 941 lp->d_secsize = v; 942 continue; 943 } 944 if (streq(cp, "sectors/track")) { 945 v = strtoul(tp, NULL, 10); 946 #if (ULONG_MAX != 0xffffffffUL) 947 if (v == 0 || v > 0xffffffff) { 948 #else 949 if (v == 0) { 950 #endif 951 fprintf(stderr, "line %d: %s: bad %s\n", 952 lineno, tp, cp); 953 errors++; 954 } else 955 lp->d_nsectors = v; 956 continue; 957 } 958 if (streq(cp, "sectors/cylinder")) { 959 v = strtoul(tp, NULL, 10); 960 if (v == 0) { 961 fprintf(stderr, "line %d: %s: bad %s\n", 962 lineno, tp, cp); 963 errors++; 964 } else 965 lp->d_secpercyl = v; 966 continue; 967 } 968 if (streq(cp, "tracks/cylinder")) { 969 v = strtoul(tp, NULL, 10); 970 if (v == 0) { 971 fprintf(stderr, "line %d: %s: bad %s\n", 972 lineno, tp, cp); 973 errors++; 974 } else 975 lp->d_ntracks = v; 976 continue; 977 } 978 if (streq(cp, "cylinders")) { 979 v = strtoul(tp, NULL, 10); 980 if (v == 0) { 981 fprintf(stderr, "line %d: %s: bad %s\n", 982 lineno, tp, cp); 983 errors++; 984 } else 985 lp->d_ncylinders = v; 986 continue; 987 } 988 if (streq(cp, "sectors/unit")) { 989 v = strtoul(tp, NULL, 10); 990 if (v == 0) { 991 fprintf(stderr, "line %d: %s: bad %s\n", 992 lineno, tp, cp); 993 errors++; 994 } else 995 lp->d_secperunit = v; 996 continue; 997 } 998 if (streq(cp, "rpm")) { 999 v = strtoul(tp, NULL, 10); 1000 if (v == 0 || v > USHRT_MAX) { 1001 fprintf(stderr, "line %d: %s: bad %s\n", 1002 lineno, tp, cp); 1003 errors++; 1004 } else 1005 lp->d_rpm = v; 1006 continue; 1007 } 1008 if (streq(cp, "interleave")) { 1009 v = strtoul(tp, NULL, 10); 1010 if (v == 0 || v > USHRT_MAX) { 1011 fprintf(stderr, "line %d: %s: bad %s\n", 1012 lineno, tp, cp); 1013 errors++; 1014 } else 1015 lp->d_interleave = v; 1016 continue; 1017 } 1018 if (streq(cp, "trackskew")) { 1019 v = strtoul(tp, NULL, 10); 1020 if (v > USHRT_MAX) { 1021 fprintf(stderr, "line %d: %s: bad %s\n", 1022 lineno, tp, cp); 1023 errors++; 1024 } else 1025 lp->d_trackskew = v; 1026 continue; 1027 } 1028 if (streq(cp, "cylinderskew")) { 1029 v = strtoul(tp, NULL, 10); 1030 if (v > USHRT_MAX) { 1031 fprintf(stderr, "line %d: %s: bad %s\n", 1032 lineno, tp, cp); 1033 errors++; 1034 } else 1035 lp->d_cylskew = v; 1036 continue; 1037 } 1038 if (streq(cp, "headswitch")) { 1039 v = strtoul(tp, NULL, 10); 1040 lp->d_headswitch = v; 1041 continue; 1042 } 1043 if (streq(cp, "track-to-track seek")) { 1044 v = strtoul(tp, NULL, 10); 1045 lp->d_trkseek = v; 1046 continue; 1047 } 1048 /* the ':' was removed above */ 1049 if (*cp < 'a' || *cp > MAX_PART || cp[1] != '\0') { 1050 fprintf(stderr, 1051 "line %d: %s: Unknown disklabel field\n", lineno, 1052 cp); 1053 errors++; 1054 continue; 1055 } 1056 1057 /* Process a partition specification line. */ 1058 part = *cp - 'a'; 1059 if (part >= lp->d_npartitions) { 1060 fprintf(stderr, 1061 "line %d: partition name out of range a-%c: %s\n", 1062 lineno, 'a' + lp->d_npartitions - 1, cp); 1063 errors++; 1064 continue; 1065 } 1066 part_set[part] = 1; 1067 1068 if (getasciipartspec(tp, lp, part, lineno) != 0) { 1069 errors++; 1070 break; 1071 } 1072 } 1073 errors += checklabel(lp); 1074 return (errors == 0); 1075 } 1076 1077 #define NXTNUM(n) do { \ 1078 if (tp == NULL) { \ 1079 fprintf(stderr, "line %d: too few numeric fields\n", lineno); \ 1080 return (1); \ 1081 } else { \ 1082 cp = tp, tp = word(cp); \ 1083 (n) = strtoul(cp, NULL, 10); \ 1084 } \ 1085 } while (0) 1086 1087 /* retain 1 character following number */ 1088 #define NXTWORD(w,n) do { \ 1089 if (tp == NULL) { \ 1090 fprintf(stderr, "line %d: too few numeric fields\n", lineno); \ 1091 return (1); \ 1092 } else { \ 1093 char *tmp; \ 1094 cp = tp, tp = word(cp); \ 1095 (n) = strtoul(cp, &tmp, 10); \ 1096 if (tmp) (w) = *tmp; \ 1097 } \ 1098 } while (0) 1099 1100 /* 1101 * Read a partition line into partition `part' in the specified disklabel. 1102 * Return 0 on success, 1 on failure. 1103 */ 1104 int 1105 getasciipartspec(char *tp, struct disklabel32 *lp, int part, int lineno) 1106 { 1107 struct partition32 *pp; 1108 char *cp; 1109 const char **cpp; 1110 u_long v; 1111 1112 pp = &lp->d_partitions[part]; 1113 cp = NULL; 1114 1115 /* 1116 * size 1117 */ 1118 v = 0; 1119 NXTWORD(part_size_type[part],v); 1120 if (v == 0 && part_size_type[part] != '*') { 1121 fprintf(stderr, 1122 "line %d: %s: bad partition size\n", lineno, cp); 1123 return (1); 1124 } 1125 pp->p_size = v; 1126 1127 /* 1128 * offset 1129 */ 1130 v = 0; 1131 NXTWORD(part_offset_type[part],v); 1132 if (v == 0 && part_offset_type[part] != '*' && 1133 part_offset_type[part] != '\0') { 1134 fprintf(stderr, 1135 "line %d: %s: bad partition offset\n", lineno, cp); 1136 return (1); 1137 } 1138 pp->p_offset = v; 1139 1140 /* 1141 * fstype 1142 */ 1143 if (tp == NULL) { 1144 fprintf(stderr, 1145 "line %d: no filesystem type was specified\n", lineno); 1146 return(1); 1147 } 1148 cp = tp; 1149 tp = word(cp); 1150 for (cpp = fstypenames; cpp < &fstypenames[FSMAXTYPES]; cpp++) { 1151 if (*cpp && strcasecmp(*cpp, cp) == 0) 1152 break; 1153 } 1154 if (*cpp != NULL) { 1155 pp->p_fstype = cpp - fstypenames; 1156 } else { 1157 if (isdigit(*cp)) 1158 v = strtoul(cp, NULL, 10); 1159 else 1160 v = FSMAXTYPES; 1161 if (v >= FSMAXTYPES) { 1162 fprintf(stderr, 1163 "line %d: Warning, unknown filesystem type %s\n", 1164 lineno, cp); 1165 v = FS_UNUSED; 1166 } 1167 pp->p_fstype = v; 1168 } 1169 1170 pp->p_fsize = 0; 1171 pp->p_frag = 0; 1172 pp->p_cpg = 0; 1173 1174 cp = tp; 1175 if (tp) { 1176 fprintf(stderr, "line %d: Warning, fragment, block, " 1177 "and bps/cpg fields are no\n" 1178 "longer supported and must be specified " 1179 "via newfs options instead.\n", 1180 lineno); 1181 } 1182 return(0); 1183 } 1184 1185 /* 1186 * Check disklabel for errors and fill in 1187 * derived fields according to supplied values. 1188 */ 1189 int 1190 checklabel(struct disklabel32 *lp) 1191 { 1192 struct partition32 *pp; 1193 int i, errors = 0; 1194 char part; 1195 u_long base_offset, needed, total_size, total_percent, current_offset; 1196 long free_space; 1197 int seen_default_offset; 1198 int hog_part; 1199 int j; 1200 struct partition32 *pp2; 1201 1202 if (lp->d_secsize == 0) { 1203 fprintf(stderr, "sector size 0\n"); 1204 return (1); 1205 } 1206 if (lp->d_nsectors == 0) { 1207 fprintf(stderr, "sectors/track 0\n"); 1208 return (1); 1209 } 1210 if (lp->d_ntracks == 0) { 1211 fprintf(stderr, "tracks/cylinder 0\n"); 1212 return (1); 1213 } 1214 if (lp->d_ncylinders == 0) { 1215 fprintf(stderr, "cylinders/unit 0\n"); 1216 errors++; 1217 } 1218 if (lp->d_rpm == 0) 1219 Warning("revolutions/minute 0"); 1220 if (lp->d_secpercyl == 0) 1221 lp->d_secpercyl = lp->d_nsectors * lp->d_ntracks; 1222 if (lp->d_secperunit == 0) 1223 lp->d_secperunit = lp->d_secpercyl * lp->d_ncylinders; 1224 if (lp->d_bbsize == 0) { 1225 fprintf(stderr, "boot block size 0\n"); 1226 errors++; 1227 } else if (lp->d_bbsize % lp->d_secsize) 1228 Warning("boot block size %% sector-size != 0"); 1229 if (lp->d_sbsize == 0) { 1230 fprintf(stderr, "super block size 0\n"); 1231 errors++; 1232 } else if (lp->d_sbsize % lp->d_secsize) 1233 Warning("super block size %% sector-size != 0"); 1234 if (lp->d_npartitions > MAXPARTITIONS32) 1235 Warning("number of partitions (%lu) > MAXPARTITIONS (%d)", 1236 (u_long)lp->d_npartitions, MAXPARTITIONS32); 1237 1238 /* first allocate space to the partitions, then offsets */ 1239 total_size = 0; /* in sectors */ 1240 total_percent = 0; /* in percent */ 1241 hog_part = -1; 1242 /* find all fixed partitions */ 1243 for (i = 0; i < lp->d_npartitions; i++) { 1244 pp = &lp->d_partitions[i]; 1245 if (part_set[i]) { 1246 1247 if (part_size_type[i] == '*') { 1248 if (i == RAW_PART) { 1249 pp->p_size = lp->d_secperunit; 1250 } else { 1251 if (part_offset_type[i] != '*') { 1252 if (total_size < pp->p_offset) 1253 total_size = pp->p_offset; 1254 } 1255 if (hog_part != -1) 1256 Warning("Too many '*' partitions (%c and %c)", 1257 hog_part + 'a',i + 'a'); 1258 else 1259 hog_part = i; 1260 } 1261 } else { 1262 off_t size; 1263 1264 size = pp->p_size; 1265 switch (part_size_type[i]) { 1266 case '%': 1267 total_percent += size; 1268 break; 1269 case 't': 1270 case 'T': 1271 size *= 1024ULL; 1272 /* FALLTHROUGH */ 1273 case 'g': 1274 case 'G': 1275 size *= 1024ULL; 1276 /* FALLTHROUGH */ 1277 case 'm': 1278 case 'M': 1279 size *= 1024ULL; 1280 /* FALLTHROUGH */ 1281 case 'k': 1282 case 'K': 1283 size *= 1024ULL; 1284 break; 1285 case '\0': 1286 break; 1287 default: 1288 Warning("unknown size specifier '%c' (K/M/G/T are valid)",part_size_type[i]); 1289 break; 1290 } 1291 /* don't count %'s yet */ 1292 if (part_size_type[i] != '%') { 1293 /* 1294 * for all not in sectors, convert to 1295 * sectors 1296 */ 1297 if (part_size_type[i] != '\0') { 1298 if (size % lp->d_secsize != 0) 1299 Warning("partition %c not an integer number of sectors", 1300 i + 'a'); 1301 size /= lp->d_secsize; 1302 pp->p_size = size; 1303 } 1304 /* else already in sectors */ 1305 if (i != RAW_PART) 1306 total_size += size; 1307 } 1308 } 1309 } 1310 } 1311 1312 /* Find out the total free space, excluding the boot block area. */ 1313 base_offset = BBSIZE / lp->d_secsize; 1314 free_space = 0; 1315 for (i = 0; i < lp->d_npartitions; i++) { 1316 pp = &lp->d_partitions[i]; 1317 if (!part_set[i] || i == RAW_PART || 1318 part_size_type[i] == '%' || part_size_type[i] == '*') 1319 continue; 1320 if (pp->p_offset > base_offset) 1321 free_space += pp->p_offset - base_offset; 1322 if (pp->p_offset + pp->p_size > base_offset) 1323 base_offset = pp->p_offset + pp->p_size; 1324 } 1325 if (base_offset < lp->d_secperunit) 1326 free_space += lp->d_secperunit - base_offset; 1327 1328 /* handle % partitions - note %'s don't need to add up to 100! */ 1329 if (total_percent != 0) { 1330 if (total_percent > 100) { 1331 fprintf(stderr,"total percentage %lu is greater than 100\n", 1332 total_percent); 1333 errors++; 1334 } 1335 1336 if (free_space > 0) { 1337 for (i = 0; i < lp->d_npartitions; i++) { 1338 pp = &lp->d_partitions[i]; 1339 if (part_set[i] && part_size_type[i] == '%') { 1340 /* careful of overflows! and integer roundoff */ 1341 pp->p_size = ((double)pp->p_size/100) * free_space; 1342 total_size += pp->p_size; 1343 1344 /* FIX we can lose a sector or so due to roundoff per 1345 partition. A more complex algorithm could avoid that */ 1346 } 1347 } 1348 } else { 1349 fprintf(stderr, 1350 "%ld sectors available to give to '*' and '%%' partitions\n", 1351 free_space); 1352 errors++; 1353 /* fix? set all % partitions to size 0? */ 1354 } 1355 } 1356 /* give anything remaining to the hog partition */ 1357 if (hog_part != -1) { 1358 /* 1359 * Find the range of offsets usable by '*' partitions around 1360 * the hog partition and how much space they need. 1361 */ 1362 needed = 0; 1363 base_offset = BBSIZE / lp->d_secsize; 1364 for (i = hog_part - 1; i >= 0; i--) { 1365 pp = &lp->d_partitions[i]; 1366 if (!part_set[i] || i == RAW_PART) 1367 continue; 1368 if (part_offset_type[i] == '*') { 1369 needed += pp->p_size; 1370 continue; 1371 } 1372 base_offset = pp->p_offset + pp->p_size; 1373 break; 1374 } 1375 current_offset = lp->d_secperunit; 1376 for (i = lp->d_npartitions - 1; i > hog_part; i--) { 1377 pp = &lp->d_partitions[i]; 1378 if (!part_set[i] || i == RAW_PART) 1379 continue; 1380 if (part_offset_type[i] == '*') { 1381 needed += pp->p_size; 1382 continue; 1383 } 1384 current_offset = pp->p_offset; 1385 } 1386 1387 if (current_offset - base_offset <= needed) { 1388 fprintf(stderr, "Cannot find space for partition %c\n", 1389 hog_part + 'a'); 1390 fprintf(stderr, 1391 "Need more than %lu sectors between %lu and %lu\n", 1392 needed, base_offset, current_offset); 1393 errors++; 1394 lp->d_partitions[hog_part].p_size = 0; 1395 } else { 1396 lp->d_partitions[hog_part].p_size = current_offset - 1397 base_offset - needed; 1398 total_size += lp->d_partitions[hog_part].p_size; 1399 } 1400 } 1401 1402 /* Now set the offsets for each partition */ 1403 current_offset = BBSIZE / lp->d_secsize; /* in sectors */ 1404 seen_default_offset = 0; 1405 for (i = 0; i < lp->d_npartitions; i++) { 1406 part = 'a' + i; 1407 pp = &lp->d_partitions[i]; 1408 if (part_set[i]) { 1409 if (part_offset_type[i] == '*') { 1410 if (i == RAW_PART) { 1411 pp->p_offset = 0; 1412 } else { 1413 pp->p_offset = current_offset; 1414 seen_default_offset = 1; 1415 } 1416 } else { 1417 /* allow them to be out of order for old-style tables */ 1418 if (pp->p_offset < current_offset && 1419 seen_default_offset && i != RAW_PART && 1420 pp->p_fstype != FS_VINUM) { 1421 fprintf(stderr, 1422 "Offset %ld for partition %c overlaps previous partition which ends at %lu\n", 1423 (long)pp->p_offset,i+'a',current_offset); 1424 fprintf(stderr, 1425 "Labels with any *'s for offset must be in ascending order by sector\n"); 1426 errors++; 1427 } else if (pp->p_offset != current_offset && 1428 i != RAW_PART && seen_default_offset) { 1429 /* 1430 * this may give unneeded warnings if 1431 * partitions are out-of-order 1432 */ 1433 Warning( 1434 "Offset %ld for partition %c doesn't match expected value %ld", 1435 (long)pp->p_offset, i + 'a', current_offset); 1436 } 1437 } 1438 if (i != RAW_PART) 1439 current_offset = pp->p_offset + pp->p_size; 1440 } 1441 } 1442 1443 for (i = 0; i < lp->d_npartitions; i++) { 1444 part = 'a' + i; 1445 pp = &lp->d_partitions[i]; 1446 if (pp->p_size == 0 && pp->p_offset != 0) 1447 Warning("partition %c: size 0, but offset %lu", 1448 part, (u_long)pp->p_offset); 1449 #ifdef notdef 1450 if (pp->p_size % lp->d_secpercyl) 1451 Warning("partition %c: size %% cylinder-size != 0", 1452 part); 1453 if (pp->p_offset % lp->d_secpercyl) 1454 Warning("partition %c: offset %% cylinder-size != 0", 1455 part); 1456 #endif 1457 if (pp->p_offset > lp->d_secperunit) { 1458 fprintf(stderr, 1459 "partition %c: offset past end of unit\n", part); 1460 errors++; 1461 } 1462 if (pp->p_offset + pp->p_size > lp->d_secperunit) { 1463 fprintf(stderr, 1464 "partition %c: partition extends past end of unit\n", 1465 part); 1466 errors++; 1467 } 1468 if (i == RAW_PART) 1469 { 1470 if (pp->p_fstype != FS_UNUSED) 1471 Warning("partition %c is not marked as unused!",part); 1472 if (pp->p_offset != 0) 1473 Warning("partition %c doesn't start at 0!",part); 1474 if (pp->p_size != lp->d_secperunit) 1475 Warning("partition %c doesn't cover the whole unit!",part); 1476 1477 if ((pp->p_fstype != FS_UNUSED) || (pp->p_offset != 0) || 1478 (pp->p_size != lp->d_secperunit)) { 1479 Warning("An incorrect partition %c may cause problems for " 1480 "standard system utilities",part); 1481 } 1482 } 1483 1484 /* check for overlaps */ 1485 /* this will check for all possible overlaps once and only once */ 1486 for (j = 0; j < i; j++) { 1487 pp2 = &lp->d_partitions[j]; 1488 if (j != RAW_PART && i != RAW_PART && 1489 pp->p_fstype != FS_VINUM && 1490 pp2->p_fstype != FS_VINUM && 1491 part_set[i] && part_set[j]) { 1492 if (pp2->p_offset < pp->p_offset + pp->p_size && 1493 (pp2->p_offset + pp2->p_size > pp->p_offset || 1494 pp2->p_offset >= pp->p_offset)) { 1495 fprintf(stderr,"partitions %c and %c overlap!\n", 1496 j + 'a', i + 'a'); 1497 errors++; 1498 } 1499 } 1500 } 1501 } 1502 for (; i < 8 || i < lp->d_npartitions; i++) { 1503 part = 'a' + i; 1504 pp = &lp->d_partitions[i]; 1505 if (pp->p_size || pp->p_offset) 1506 Warning("unused partition %c: size %d offset %lu", 1507 'a' + i, pp->p_size, (u_long)pp->p_offset); 1508 } 1509 return (errors); 1510 } 1511 1512 /* 1513 * When operating on a "virgin" disk, try getting an initial label 1514 * from the associated device driver. This might work for all device 1515 * drivers that are able to fetch some initial device parameters 1516 * without even having access to a (BSD) disklabel, like SCSI disks, 1517 * most IDE drives, or vn devices. 1518 */ 1519 static struct disklabel32 dlab; 1520 1521 struct disklabel32 * 1522 getvirginlabel(void) 1523 { 1524 struct partinfo info; 1525 struct disklabel32 *dl = &dlab; 1526 int f; 1527 1528 if ((f = open(dkname, O_RDONLY)) == -1) { 1529 warn("cannot open %s", dkname); 1530 return (NULL); 1531 } 1532 1533 /* 1534 * Check to see if the media is too big for a 32 bit disklabel. 1535 */ 1536 if (ioctl(f, DIOCGPART, &info) == 0) { 1537 if (info.media_size >= 0x100000000ULL * 512) { 1538 warnx("The media is too large for a 32 bit disklabel," 1539 " please use disklabel64."); 1540 return (NULL); 1541 } 1542 } 1543 1544 /* 1545 * Generate a virgin disklabel via ioctl 1546 */ 1547 if (ioctl(f, DIOCGDVIRGIN32, dl) < 0) { 1548 l_perror("ioctl DIOCGDVIRGIN32"); 1549 close(f); 1550 return(NULL); 1551 } 1552 close(f); 1553 return (dl); 1554 } 1555 1556 struct disklabel32 * 1557 getdisklabelfromdisktab(const char *name) 1558 { 1559 struct disktab *dt; 1560 struct disklabel32 *dl = &dlab; 1561 int i; 1562 1563 if ((dt = getdisktabbyname(name)) == NULL) 1564 return(NULL); 1565 dl->d_magic = DISKMAGIC32; 1566 dl->d_type = dt->d_typeid; 1567 dl->d_subtype = 0; 1568 dl->d_secsize = dt->d_media_blksize; 1569 dl->d_nsectors = dt->d_secpertrack; 1570 dl->d_ntracks = dt->d_nheads; 1571 dl->d_ncylinders = dt->d_ncylinders; 1572 dl->d_secpercyl = dt->d_secpercyl; 1573 dl->d_secperunit = dt->d_media_blocks; 1574 dl->d_rpm = dt->d_rpm; 1575 dl->d_interleave = dt->d_interleave; 1576 dl->d_trackskew = dt->d_trackskew; 1577 dl->d_cylskew = dt->d_cylskew; 1578 dl->d_headswitch = dt->d_headswitch; 1579 dl->d_trkseek = dt->d_trkseek; 1580 dl->d_magic2 = DISKMAGIC32; 1581 dl->d_npartitions = dt->d_npartitions; 1582 dl->d_bbsize = dt->d_bbsize; 1583 dl->d_sbsize = dt->d_sbsize; 1584 for (i = 0; i < dt->d_npartitions; ++i) { 1585 struct partition32 *dlp = &dl->d_partitions[i]; 1586 struct dt_partition *dtp = &dt->d_partitions[i]; 1587 1588 dlp->p_size = dtp->p_size; 1589 dlp->p_offset = dtp->p_offset; 1590 dlp->p_fsize = dtp->p_fsize; 1591 dlp->p_fstype = dtp->p_fstype; 1592 dlp->p_frag = dtp->p_fsize; 1593 } 1594 return(dl); 1595 } 1596 1597 /* 1598 * If we are installing a boot program that doesn't fit in d_bbsize 1599 * we need to mark those partitions that the boot overflows into. 1600 * This allows newfs to prevent creation of a filesystem where it might 1601 * clobber bootstrap code. 1602 */ 1603 void 1604 setbootflag(struct disklabel32 *lp) 1605 { 1606 struct partition32 *pp; 1607 int i, errors = 0; 1608 char part; 1609 u_long boffset; 1610 1611 if (bootbuf == NULL) 1612 return; 1613 boffset = bootsize / lp->d_secsize; 1614 for (i = 0; i < lp->d_npartitions; i++) { 1615 part = 'a' + i; 1616 pp = &lp->d_partitions[i]; 1617 if (pp->p_size == 0) 1618 continue; 1619 if (boffset <= pp->p_offset) { 1620 if (pp->p_fstype == FS_BOOT) 1621 pp->p_fstype = FS_UNUSED; 1622 } else if (pp->p_fstype != FS_BOOT) { 1623 if (pp->p_fstype != FS_UNUSED) { 1624 fprintf(stderr, 1625 "boot overlaps used partition %c\n", 1626 part); 1627 errors++; 1628 } else { 1629 pp->p_fstype = FS_BOOT; 1630 Warning("boot overlaps partition %c, %s", 1631 part, "marked as FS_BOOT"); 1632 } 1633 } 1634 } 1635 if (errors) 1636 errx(4, "cannot install boot program"); 1637 } 1638 1639 /*VARARGS1*/ 1640 void 1641 Warning(const char *fmt, ...) 1642 { 1643 va_list ap; 1644 1645 fprintf(stderr, "Warning, "); 1646 va_start(ap, fmt); 1647 vfprintf(stderr, fmt, ap); 1648 fprintf(stderr, "\n"); 1649 va_end(ap); 1650 } 1651 1652 /* 1653 * Check to see if the bootblocks are in the wrong place. FBsd5 bootblocks 1654 * and earlier DFly bb's are packed against the old disklabel and a new 1655 * disklabel would blow them up. This is a hack that should be removed 1656 * in 2006 sometime (if ever). 1657 */ 1658 1659 int 1660 checkoldboot(int f, const char *bootbuffer) 1661 { 1662 char buf[BBSIZE]; 1663 1664 if (bootbuffer && strncmp(bootbuffer + 0x402, "BTX", 3) == 0) 1665 return(0); 1666 lseek(f, (off_t)0, SEEK_SET); 1667 if (read(f, buf, sizeof(buf)) != sizeof(buf)) 1668 return(0); 1669 if (strncmp(buf + 0x402, "BTX", 3) == 0) /* new location */ 1670 return(0); 1671 if (strncmp(buf + 0x316, "BTX", 3) == 0) /* old location */ 1672 return(1); 1673 return(0); 1674 } 1675 1676 /* 1677 * Traditional 32 bit disklabels actually use absolute sector numbers on 1678 * disk, NOT slice relative sector numbres. The OS hides this from us 1679 * when we use DIOC ioctls to access the label, but newer versions of 1680 * Dragonfly no longer adjusts the disklabel when snooping reads or writes 1681 * so we have to figure it out ourselves. 1682 */ 1683 const char * 1684 fixlabel(int f, struct disklabel32 *lp, int writeadj) 1685 { 1686 const char *msg = NULL; 1687 struct partinfo info; 1688 struct partition32 *pp; 1689 u_int64_t start; 1690 u_int64_t end; 1691 u_int64_t offset; 1692 int part; 1693 int rev; 1694 size_t rev_len = sizeof(rev); 1695 1696 if (sysctlbyname("kern.osrevision", &rev, &rev_len, NULL, 0) < 0) { 1697 errx(1, "Cannot use raw mode on non-DragonFly systems\n"); 1698 } 1699 if (rev < 200701) { 1700 warnx("Warning running new disklabel on old DragonFly systems,\n" 1701 "assuming the disk layer will fixup the label.\n"); 1702 sleep(3); 1703 return(NULL); 1704 } 1705 1706 pp = &lp->d_partitions[RAW_PART]; 1707 1708 if (forceflag) { 1709 info.media_offset = slice_start_lba * lp->d_secsize; 1710 info.media_blocks = pp->p_size; 1711 info.media_blksize = lp->d_secsize; 1712 } else if (ioctl(f, DIOCGPART, &info) < 0) { 1713 msg = "Unable to extract the slice starting LBA, " 1714 "you must use the -f <slice_start_lba> option\n" 1715 "to specify it manually, or perhaps try without " 1716 "using -r and let the kernel deal with it\n"; 1717 return(msg); 1718 } 1719 1720 if (lp->d_magic != DISKMAGIC32 || lp->d_magic2 != DISKMAGIC32) 1721 return ("fixlabel: invalid magic"); 1722 if (dkcksum32(lp) != 0) 1723 return ("fixlabel: invalid checksum"); 1724 1725 /* 1726 * What a mess. For ages old backwards compatibility the disklabel 1727 * on-disk stores absolute offsets instead of slice-relative offsets. 1728 * So fix it up when reading, writing, or snooping. 1729 * 1730 * The in-core label is always slice-relative. 1731 */ 1732 if (writeadj) { 1733 /* 1734 * incore -> disk 1735 */ 1736 start = 0; 1737 offset = info.media_offset / info.media_blksize; 1738 } else { 1739 /* 1740 * disk -> incore 1741 */ 1742 start = info.media_offset / info.media_blksize; 1743 offset = -info.media_offset / info.media_blksize; 1744 } 1745 if (pp->p_offset != start) 1746 return ("fixlabel: raw partition offset != slice offset"); 1747 if (pp->p_size != info.media_blocks) { 1748 if (pp->p_size > info.media_blocks) 1749 return ("fixlabel: raw partition size > slice size"); 1750 } 1751 end = start + info.media_blocks; 1752 if (start > end) 1753 return ("fixlabel: slice wraps"); 1754 if (lp->d_secpercyl <= 0) 1755 return ("fixlabel: d_secpercyl <= 0"); 1756 pp -= RAW_PART; 1757 for (part = 0; part < lp->d_npartitions; part++, pp++) { 1758 if (pp->p_offset != 0 || pp->p_size != 0) { 1759 if (pp->p_offset < start 1760 || pp->p_offset + pp->p_size > end 1761 || pp->p_offset + pp->p_size < pp->p_offset) { 1762 /* XXX else silently discard junk. */ 1763 bzero(pp, sizeof *pp); 1764 } else { 1765 pp->p_offset += offset; 1766 } 1767 } 1768 } 1769 lp->d_checksum = 0; 1770 lp->d_checksum = dkcksum32(lp); 1771 return (NULL); 1772 } 1773 1774 void 1775 usage(void) 1776 { 1777 #if NUMBOOT > 0 1778 fprintf(stderr, "%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n", 1779 "usage: disklabel32 [-r] disk", 1780 "\t\t(to read label)", 1781 " disklabel32 -w [-r] [-n] disk type [packid]", 1782 "\t\t(to write label with existing boot program)", 1783 " disklabel32 -e [-r] [-n] disk", 1784 "\t\t(to edit label)", 1785 " disklabel32 -R [-r] [-n] disk protofile", 1786 "\t\t(to restore label with existing boot program)", 1787 #if NUMBOOT > 1 1788 " disklabel32 -B [-n] [-b boot1 -s boot2] disk [type]", 1789 "\t\t(to install boot program with existing label)", 1790 " disklabel32 -w -B [-n] [-b boot1 -s boot2] disk type [packid]", 1791 "\t\t(to write label and boot program)", 1792 " disklabel32 -R -B [-n] [-b boot1 -s boot2] disk protofile [type]", 1793 "\t\t(to restore label and boot program)", 1794 #else 1795 " disklabel32 -B [-n] [-b bootprog] disk [type]", 1796 "\t\t(to install boot program with existing on-disk label)", 1797 " disklabel32 -w -B [-n] [-b bootprog] disk type [packid]", 1798 "\t\t(to write label and install boot program)", 1799 " disklabel32 -R -B [-n] [-b bootprog] disk protofile [type]", 1800 "\t\t(to restore label and install boot program)", 1801 #endif 1802 " disklabel32 [-NW] disk", 1803 "\t\t(to write disable/enable label)"); 1804 #else 1805 fprintf(stderr, "%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n", 1806 "usage: disklabel32 [-r] disk", "(to read label)", 1807 " disklabel32 -w [-r] [-n] disk type [packid]", 1808 "\t\t(to write label)", 1809 " disklabel32 -e [-r] [-n] disk", 1810 "\t\t(to edit label)", 1811 " disklabel32 -R [-r] [-n] disk protofile", 1812 "\t\t(to restore label)", 1813 " disklabel32 [-NW] disk", 1814 "\t\t(to write disable/enable label)"); 1815 #endif 1816 fprintf(stderr, "%s\n%s\n", 1817 " disklabel32 [-f slice_start_lba] [options]", 1818 "\t\t(to force using manual offset)"); 1819 exit(1); 1820 } 1821