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 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * @(#) Copyright (c) 1987, 1993 The Regents of the University of California. All rights reserved. 37 * @(#)disklabel.c 1.2 (Symmetric) 11/28/85 38 * @(#)disklabel.c 8.2 (Berkeley) 1/7/94 39 * $FreeBSD: src/sbin/disklabel/disklabel.c,v 1.28.2.15 2003/01/24 16:18:16 des Exp $ 40 * $DragonFly: src/sbin/disklabel/disklabel.c,v 1.28 2008/08/21 21:22:36 thomas Exp $ 41 */ 42 43 #include <sys/param.h> 44 #include <sys/file.h> 45 #include <sys/stat.h> 46 #include <sys/wait.h> 47 #define DKTYPENAMES 48 #include <sys/disklabel32.h> 49 #include <sys/disklabel64.h> 50 #include <sys/diskslice.h> 51 #include <sys/diskmbr.h> 52 #include <sys/dtype.h> 53 #include <sys/sysctl.h> 54 #include <disktab.h> 55 #include <fstab.h> 56 57 #include <vfs/ufs/dinode.h> 58 #include <vfs/ufs/fs.h> 59 60 #include <unistd.h> 61 #include <string.h> 62 #include <stdio.h> 63 #include <stdlib.h> 64 #include <signal.h> 65 #include <stdarg.h> 66 #include <ctype.h> 67 #include <err.h> 68 #include <errno.h> 69 #include <disktab.h> 70 #include "pathnames.h" 71 72 /* 73 * Disklabel32: read and write 32 bit disklabels. 74 * The label is usually placed on one of the first sectors of the disk. 75 * Many machines also place a bootstrap in the same area, 76 * in which case the label is embedded in the bootstrap. 77 * The bootstrap source must leave space at the proper offset 78 * for the label on such machines. 79 */ 80 81 #ifndef BBSIZE 82 #define BBSIZE 8192 /* size of boot area, with label */ 83 #endif 84 85 /* FIX! These are too low, but are traditional */ 86 #define DEFAULT_NEWFS_BLOCK 8192U 87 #define DEFAULT_NEWFS_FRAG 1024U 88 #define DEFAULT_NEWFS_CPG 16U 89 90 #define BIG_NEWFS_BLOCK 16384U 91 #define BIG_NEWFS_FRAG 2048U 92 #define BIG_NEWFS_CPG 64U 93 94 #define NUMBOOT 2 95 96 void makelabel(const char *, const char *, struct disklabel32 *); 97 int writelabel(int, const char *, struct disklabel32 *); 98 void l_perror(const char *); 99 struct disklabel32 *readlabel(int); 100 struct disklabel32 *makebootarea(char *, struct disklabel32 *, int); 101 void display(FILE *, const struct disklabel32 *); 102 int edit(struct disklabel32 *, int); 103 int editit(void); 104 char *skip(char *); 105 char *word(char *); 106 int getasciilabel(FILE *, struct disklabel32 *); 107 int getasciipartspec(char *, struct disklabel32 *, int, int); 108 int checklabel(struct disklabel32 *); 109 void setbootflag(struct disklabel32 *); 110 void Warning(const char *, ...) __printflike(1, 2); 111 void usage(void); 112 int checkoldboot(int, const char *); 113 const char *fixlabel(int, struct disklabel32 *, int); 114 struct disklabel32 *getvirginlabel(void); 115 struct disklabel32 *getdisklabelfromdisktab(const char *name); 116 117 #define DEFEDITOR _PATH_VI 118 #define streq(a,b) (strcmp(a,b) == 0) 119 120 char *dkname; 121 char *specname; 122 char tmpfil[] = PATH_TMPFILE; 123 124 char namebuf[BBSIZE]; 125 struct disklabel32 lab; 126 char bootarea[BBSIZE]; 127 128 #define MAX_PART ('z') 129 #define MAX_NUM_PARTS (1 + MAX_PART - 'a') 130 char part_size_type[MAX_NUM_PARTS]; 131 char part_offset_type[MAX_NUM_PARTS]; 132 int part_set[MAX_NUM_PARTS]; 133 134 #if NUMBOOT > 0 135 int installboot; /* non-zero if we should install a boot program */ 136 char *bootbuf; /* pointer to buffer with remainder of boot prog */ 137 int bootsize; /* size of remaining boot program */ 138 char *xxboot; /* primary boot */ 139 char *bootxx; /* secondary boot */ 140 char boot0[MAXPATHLEN]; 141 char boot1[MAXPATHLEN]; 142 #endif 143 144 enum { 145 UNSPEC, EDIT, NOWRITE, READ, RESTORE, WRITE, WRITEABLE, WRITEBOOT 146 } op = UNSPEC; 147 148 int rflag; 149 int disable_write; /* set to disable writing to disk label */ 150 int forceflag; 151 u_int32_t slice_start_lba; 152 153 #ifdef DEBUG 154 int debug; 155 #define OPTIONS "BNRWb:def:nrs:w" 156 #else 157 #define OPTIONS "BNRWb:ef:nrs:w" 158 #endif 159 160 int 161 main(int argc, char *argv[]) 162 { 163 struct disklabel32 *lp; 164 FILE *t; 165 int ch, f = 0, flag, error = 0; 166 char *name = 0; 167 168 while ((ch = getopt(argc, argv, OPTIONS)) != -1) 169 switch (ch) { 170 #if NUMBOOT > 0 171 case 'B': 172 ++installboot; 173 break; 174 case 'b': 175 xxboot = optarg; 176 break; 177 178 case 'f': 179 forceflag = 1; 180 slice_start_lba = strtoul(optarg, NULL, 0); 181 break; 182 #if NUMBOOT > 1 183 case 's': 184 bootxx = optarg; 185 break; 186 #endif 187 #endif 188 case 'N': 189 if (op != UNSPEC) 190 usage(); 191 op = NOWRITE; 192 break; 193 case 'n': 194 disable_write = 1; 195 break; 196 case 'R': 197 if (op != UNSPEC) 198 usage(); 199 op = RESTORE; 200 break; 201 case 'W': 202 if (op != UNSPEC) 203 usage(); 204 op = WRITEABLE; 205 break; 206 case 'e': 207 if (op != UNSPEC) 208 usage(); 209 op = EDIT; 210 break; 211 case 'r': 212 ++rflag; 213 break; 214 case 'w': 215 if (op != UNSPEC) 216 usage(); 217 op = WRITE; 218 break; 219 #ifdef DEBUG 220 case 'd': 221 debug++; 222 break; 223 #endif 224 case '?': 225 default: 226 usage(); 227 } 228 argc -= optind; 229 argv += optind; 230 #if NUMBOOT > 0 231 if (installboot) { 232 rflag++; 233 if (op == UNSPEC) 234 op = WRITEBOOT; 235 } else { 236 if (op == UNSPEC) 237 op = READ; 238 xxboot = bootxx = 0; 239 } 240 #else 241 if (op == UNSPEC) 242 op = READ; 243 #endif 244 if (argc < 1) 245 usage(); 246 247 dkname = getdevpath(argv[0], 0); 248 specname = dkname; 249 f = open(specname, op == READ ? O_RDONLY : O_RDWR); 250 if (f < 0) 251 err(4, "%s", specname); 252 253 switch(op) { 254 255 case UNSPEC: 256 break; 257 258 case EDIT: 259 if (argc != 1) 260 usage(); 261 lp = readlabel(f); 262 error = edit(lp, f); 263 break; 264 265 case NOWRITE: 266 flag = 0; 267 if (ioctl(f, DIOCWLABEL, (char *)&flag) < 0) 268 err(4, "ioctl DIOCWLABEL"); 269 break; 270 271 case READ: 272 if (argc != 1) 273 usage(); 274 lp = readlabel(f); 275 display(stdout, lp); 276 error = checklabel(lp); 277 if (checkoldboot(f, NULL)) 278 warnx("Warning, old bootblocks detected, install new bootblocks & reinstall the disklabel"); 279 break; 280 281 case RESTORE: 282 #if NUMBOOT > 0 283 if (installboot && argc == 3) { 284 makelabel(argv[2], 0, &lab); 285 argc--; 286 287 /* 288 * We only called makelabel() for its side effect 289 * of setting the bootstrap file names. Discard 290 * all changes to `lab' so that all values in the 291 * final label come from the ASCII label. 292 */ 293 bzero((char *)&lab, sizeof(lab)); 294 } 295 #endif 296 if (argc != 2) 297 usage(); 298 if (!(t = fopen(argv[1], "r"))) 299 err(4, "%s", argv[1]); 300 if (!getasciilabel(t, &lab)) 301 exit(1); 302 lp = makebootarea(bootarea, &lab, f); 303 *lp = lab; 304 error = writelabel(f, bootarea, lp); 305 break; 306 307 case WRITE: 308 if (argc == 3) { 309 name = argv[2]; 310 argc--; 311 } 312 if (argc != 2) 313 usage(); 314 makelabel(argv[1], name, &lab); 315 lp = makebootarea(bootarea, &lab, f); 316 *lp = lab; 317 if (checklabel(lp) == 0) 318 error = writelabel(f, bootarea, lp); 319 break; 320 321 case WRITEABLE: 322 flag = 1; 323 if (ioctl(f, DIOCWLABEL, (char *)&flag) < 0) 324 err(4, "ioctl DIOCWLABEL"); 325 break; 326 327 #if NUMBOOT > 0 328 case WRITEBOOT: 329 { 330 struct disklabel32 tlab; 331 332 lp = readlabel(f); 333 tlab = *lp; 334 if (argc == 2) 335 makelabel(argv[1], 0, &lab); 336 lp = makebootarea(bootarea, &lab, f); 337 *lp = tlab; 338 if (checklabel(lp) == 0) 339 error = writelabel(f, bootarea, lp); 340 break; 341 } 342 #endif 343 } 344 exit(error); 345 } 346 347 /* 348 * Construct a prototype disklabel from /etc/disktab. As a side 349 * effect, set the names of the primary and secondary boot files 350 * if specified. 351 */ 352 void 353 makelabel(const char *type, const char *name, struct disklabel32 *lp) 354 { 355 struct disklabel32 *dp; 356 357 if (strcmp(type, "auto") == 0) 358 dp = getvirginlabel(); 359 else 360 dp = getdisklabelfromdisktab(type); 361 if (dp == NULL) 362 errx(1, "%s: unknown disk type", type); 363 *lp = *dp; 364 365 /* 366 * NOTE: boot control files may no longer be specified in disktab. 367 */ 368 if (name) 369 strncpy(lp->d_packname, name, sizeof(lp->d_packname)); 370 } 371 372 int 373 writelabel(int f, const char *boot, struct disklabel32 *lp) 374 { 375 const char *msg; 376 int flag; 377 int r; 378 379 if (disable_write) { 380 Warning("write to disk label suppressed - label was as follows:"); 381 display(stdout, lp); 382 return (0); 383 } else { 384 /* make sure we are not overwriting our boot code */ 385 if (checkoldboot(f, boot)) 386 errx(4, "Will not overwrite old bootblocks w/ label, install new boot blocks first!"); 387 setbootflag(lp); 388 lp->d_magic = DISKMAGIC32; 389 lp->d_magic2 = DISKMAGIC32; 390 lp->d_checksum = 0; 391 lp->d_checksum = dkcksum32(lp); 392 if (rflag) { 393 /* 394 * First set the kernel disk label, 395 * then write a label to the raw disk. 396 * If the SDINFO ioctl fails because it is unimplemented, 397 * keep going; otherwise, the kernel consistency checks 398 * may prevent us from changing the current (in-core) 399 * label. 400 */ 401 if (ioctl(f, DIOCSDINFO32, lp) < 0 && 402 errno != ENODEV && errno != ENOTTY) { 403 l_perror("ioctl DIOCSDINFO32"); 404 return (1); 405 } 406 lseek(f, (off_t)0, SEEK_SET); 407 408 /* 409 * write enable label sector before write 410 * (if necessary), disable after writing. 411 */ 412 flag = 1; 413 if (ioctl(f, DIOCWLABEL, &flag) < 0) 414 warn("ioctl DIOCWLABEL"); 415 msg = fixlabel(f, lp, 1); 416 if (msg) { 417 warn(msg); 418 return (1); 419 } 420 r = write(f, boot, lp->d_bbsize); 421 fixlabel(f, lp, 0); 422 if (r != ((ssize_t)lp->d_bbsize)) { 423 warn("write"); 424 return (1); 425 } 426 #if NUMBOOT > 0 427 /* 428 * Output the remainder of the disklabel 429 */ 430 if (bootbuf) { 431 fixlabel(f, lp, 1); 432 r = write(f, bootbuf, bootsize); 433 fixlabel(f, lp, 0); 434 if (r != bootsize) { 435 warn("write"); 436 return(1); 437 } 438 } 439 #endif 440 flag = 0; 441 ioctl(f, DIOCWLABEL, &flag); 442 } else if (ioctl(f, DIOCWDINFO32, lp) < 0) { 443 l_perror("ioctl DIOCWDINFO32"); 444 return (1); 445 } 446 } 447 return (0); 448 } 449 450 void 451 l_perror(const char *s) 452 { 453 switch (errno) { 454 455 case ESRCH: 456 warnx("%s: no disk label on disk;", s); 457 fprintf(stderr, "add \"-r\" to install initial label\n"); 458 break; 459 460 case EINVAL: 461 warnx("%s: label magic number or checksum is wrong!", s); 462 fprintf(stderr, "(disklabel or kernel is out of date?)\n"); 463 break; 464 465 case EBUSY: 466 warnx("%s: open partition would move or shrink", s); 467 break; 468 469 case EXDEV: 470 warnx("%s: '%c' partition must start at beginning of disk", 471 s, 'a' + RAW_PART); 472 break; 473 474 case ENOATTR: 475 warnx("%s: the disk already has a label of a different type,\n" 476 "probably a 64 bit disklabel. It must be cleaned out " 477 "first.\n", s); 478 break; 479 480 default: 481 warn(NULL); 482 break; 483 } 484 } 485 486 /* 487 * Fetch disklabel for disk. 488 * Use ioctl to get label unless -r flag is given. 489 */ 490 struct disklabel32 * 491 readlabel(int f) 492 { 493 const char *msg; 494 struct disklabel32 *lp; 495 int r; 496 497 if (rflag) { 498 r = read(f, bootarea, BBSIZE); 499 if (r < BBSIZE) 500 err(4, "%s", specname); 501 for (lp = (struct disklabel32 *)bootarea; 502 lp <= (struct disklabel32 *)(bootarea + BBSIZE - sizeof(*lp)); 503 lp = (struct disklabel32 *)((char *)lp + 16)) { 504 if (lp->d_magic == DISKMAGIC32 && 505 lp->d_magic2 == DISKMAGIC32) 506 break; 507 } 508 if (lp > (struct disklabel32 *)(bootarea+BBSIZE-sizeof(*lp)) || 509 lp->d_magic != DISKMAGIC32 || lp->d_magic2 != DISKMAGIC32 || 510 dkcksum32(lp) != 0) { 511 errx(1, "bad pack magic number (label is damaged, " 512 "or pack is unlabeled)"); 513 } 514 if ((msg = fixlabel(f, lp, 0)) != NULL) 515 errx(1, msg); 516 } else { 517 lp = &lab; 518 if (ioctl(f, DIOCGDINFO32, lp) < 0) { 519 l_perror("ioctl DIOCGDINFO32"); 520 exit(4); 521 } 522 } 523 return (lp); 524 } 525 526 /* 527 * Construct a bootarea (d_bbsize bytes) in the specified buffer ``boot'' 528 * Returns a pointer to the disklabel portion of the bootarea. 529 */ 530 struct disklabel32 * 531 makebootarea(char *boot, struct disklabel32 *dp, int f) 532 { 533 struct disklabel32 *lp; 534 char *p; 535 int b; 536 #if NUMBOOT > 0 537 struct stat sb; 538 #endif 539 #ifdef __i386__ 540 char *tmpbuf; 541 unsigned int i, found; 542 #endif 543 544 /* XXX */ 545 if (dp->d_secsize == 0) { 546 dp->d_secsize = DEV_BSIZE; 547 dp->d_bbsize = BBSIZE; 548 } 549 lp = (struct disklabel32 *) 550 (boot + (LABELSECTOR32 * dp->d_secsize) + LABELOFFSET32); 551 bzero((char *)lp, sizeof *lp); 552 #if NUMBOOT > 0 553 /* 554 * If we are not installing a boot program but we are installing a 555 * label on disk then we must read the current bootarea so we don't 556 * clobber the existing boot. 557 */ 558 if (!installboot) { 559 if (rflag) { 560 if (read(f, boot, BBSIZE) < BBSIZE) 561 err(4, "%s", specname); 562 bzero((char *)lp, sizeof *lp); 563 } 564 return (lp); 565 } 566 /* 567 * We are installing a boot program. Determine the name(s) and 568 * read them into the appropriate places in the boot area. 569 */ 570 if (!xxboot || !bootxx) { 571 if (!xxboot) { 572 sprintf(boot0, "%s/boot1", _PATH_BOOTDIR); 573 xxboot = boot0; 574 } 575 #if NUMBOOT > 1 576 if (!bootxx) { 577 sprintf(boot1, "%s/boot2", _PATH_BOOTDIR); 578 bootxx = boot1; 579 } 580 #endif 581 } 582 #ifdef DEBUG 583 if (debug) 584 fprintf(stderr, "bootstraps: xxboot = %s, bootxx = %s\n", 585 xxboot, bootxx ? bootxx : "NONE"); 586 #endif 587 588 /* 589 * Strange rules: 590 * 1. One-piece bootstrap (hp300/hp800) 591 * up to d_bbsize bytes of ``xxboot'' go in bootarea, the rest 592 * is remembered and written later following the bootarea. 593 * 2. Two-piece bootstraps (vax/i386?/mips?) 594 * up to d_secsize bytes of ``xxboot'' go in first d_secsize 595 * bytes of bootarea, remaining d_bbsize-d_secsize filled 596 * from ``bootxx''. 597 */ 598 b = open(xxboot, O_RDONLY); 599 if (b < 0) 600 err(4, "%s", xxboot); 601 #if NUMBOOT > 1 602 #ifdef __i386__ 603 /* 604 * XXX Botch alert. 605 * The i386 has the so-called fdisk table embedded into the 606 * primary bootstrap. We take care to not clobber it, but 607 * only if it does already contain some data. (Otherwise, 608 * the xxboot provides a template.) 609 */ 610 if ((tmpbuf = (char *)malloc((int)dp->d_secsize)) == 0) 611 err(4, "%s", xxboot); 612 memcpy((void *)tmpbuf, (void *)boot, (int)dp->d_secsize); 613 #endif /* i386 */ 614 if (read(b, boot, (int)dp->d_secsize) < 0) 615 err(4, "%s", xxboot); 616 close(b); 617 #ifdef __i386__ 618 for (i = DOSPARTOFF, found = 0; 619 !found && i < DOSPARTOFF + NDOSPART*sizeof(struct dos_partition); 620 i++) 621 found = tmpbuf[i] != 0; 622 if (found) 623 memcpy((void *)&boot[DOSPARTOFF], 624 (void *)&tmpbuf[DOSPARTOFF], 625 NDOSPART * sizeof(struct dos_partition)); 626 free(tmpbuf); 627 #endif /* i386 */ 628 b = open(bootxx, O_RDONLY); 629 if (b < 0) 630 err(4, "%s", bootxx); 631 if (fstat(b, &sb) != 0) 632 err(4, "%s", bootxx); 633 if (dp->d_secsize + sb.st_size > dp->d_bbsize) 634 errx(4, "%s too large", bootxx); 635 if (read(b, &boot[dp->d_secsize], 636 (int)(dp->d_bbsize-dp->d_secsize)) < 0) 637 err(4, "%s", bootxx); 638 #else /* !(NUMBOOT > 1) */ 639 if (read(b, boot, (int)dp->d_bbsize) < 0) 640 err(4, "%s", xxboot); 641 if (fstat(b, &sb) != 0) 642 err(4, "%s", xxboot); 643 bootsize = (int)sb.st_size - dp->d_bbsize; 644 if (bootsize > 0) { 645 /* XXX assume d_secsize is a power of two */ 646 bootsize = (bootsize + dp->d_secsize-1) & ~(dp->d_secsize-1); 647 bootbuf = (char *)malloc((size_t)bootsize); 648 if (bootbuf == 0) 649 err(4, "%s", xxboot); 650 if (read(b, bootbuf, bootsize) < 0) { 651 free(bootbuf); 652 err(4, "%s", xxboot); 653 } 654 } 655 #endif /* NUMBOOT > 1 */ 656 close(b); 657 #endif /* NUMBOOT > 0 */ 658 /* 659 * Make sure no part of the bootstrap is written in the area 660 * reserved for the label. 661 */ 662 for (p = (char *)lp; p < (char *)lp + sizeof(struct disklabel32); p++) 663 if (*p) 664 errx(2, "bootstrap doesn't leave room for disk label"); 665 return (lp); 666 } 667 668 void 669 display(FILE *f, const struct disklabel32 *lp) 670 { 671 int i, j; 672 const struct partition32 *pp; 673 674 fprintf(f, "# %s:\n", specname); 675 if (lp->d_type < DKMAXTYPES) 676 fprintf(f, "type: %s\n", dktypenames[lp->d_type]); 677 else 678 fprintf(f, "type: %u\n", lp->d_type); 679 fprintf(f, "disk: %.*s\n", (int)sizeof(lp->d_typename), 680 lp->d_typename); 681 fprintf(f, "label: %.*s\n", (int)sizeof(lp->d_packname), 682 lp->d_packname); 683 fprintf(f, "flags:"); 684 fprintf(f, "\n"); 685 fprintf(f, "bytes/sector: %lu\n", (u_long)lp->d_secsize); 686 fprintf(f, "sectors/track: %lu\n", (u_long)lp->d_nsectors); 687 fprintf(f, "tracks/cylinder: %lu\n", (u_long)lp->d_ntracks); 688 fprintf(f, "sectors/cylinder: %lu\n", (u_long)lp->d_secpercyl); 689 fprintf(f, "cylinders: %lu\n", (u_long)lp->d_ncylinders); 690 fprintf(f, "sectors/unit: %lu\n", (u_long)lp->d_secperunit); 691 fprintf(f, "rpm: %u\n", lp->d_rpm); 692 fprintf(f, "interleave: %u\n", lp->d_interleave); 693 fprintf(f, "trackskew: %u\n", lp->d_trackskew); 694 fprintf(f, "cylinderskew: %u\n", lp->d_cylskew); 695 fprintf(f, "headswitch: %lu\t\t# milliseconds\n", 696 (u_long)lp->d_headswitch); 697 fprintf(f, "track-to-track seek: %ld\t# milliseconds\n", 698 (u_long)lp->d_trkseek); 699 fprintf(f, "drivedata: "); 700 for (i = NDDATA32 - 1; i >= 0; i--) { 701 if (lp->d_drivedata[i]) 702 break; 703 } 704 if (i < 0) 705 i = 0; 706 for (j = 0; j <= i; j++) 707 fprintf(f, "%lu ", (u_long)lp->d_drivedata[j]); 708 fprintf(f, "\n\n%u partitions:\n", lp->d_npartitions); 709 fprintf(f, 710 "# size offset fstype\n"); 711 pp = lp->d_partitions; 712 for (i = 0; i < lp->d_npartitions; i++, pp++) { 713 if (pp->p_size) { 714 u_long onemeg = 1024 * 1024 / lp->d_secsize; 715 fprintf(f, " %c: ", 'a' + i); 716 717 fprintf(f, "%10lu ", (u_long)pp->p_size); 718 fprintf(f, "%10lu ", (u_long)pp->p_offset); 719 if (pp->p_fstype < FSMAXTYPES) 720 fprintf(f, "%8.8s", fstypenames[pp->p_fstype]); 721 else 722 fprintf(f, "%8d", pp->p_fstype); 723 724 fprintf(f, "\t# %11.3fMB", (double)pp->p_size / onemeg); 725 fprintf(f, "\n"); 726 } 727 } 728 fflush(f); 729 } 730 731 int 732 edit(struct disklabel32 *lp, int f) 733 { 734 int c, fd; 735 struct disklabel32 label; 736 FILE *fp; 737 738 if ((fd = mkstemp(tmpfil)) == -1 || 739 (fp = fdopen(fd, "w")) == NULL) { 740 warnx("can't create %s", tmpfil); 741 return (1); 742 } 743 display(fp, lp); 744 fclose(fp); 745 for (;;) { 746 if (!editit()) 747 break; 748 fp = fopen(tmpfil, "r"); 749 if (fp == NULL) { 750 warnx("can't reopen %s for reading", tmpfil); 751 break; 752 } 753 bzero((char *)&label, sizeof(label)); 754 if (getasciilabel(fp, &label)) { 755 *lp = label; 756 if (writelabel(f, bootarea, lp) == 0) { 757 fclose(fp); 758 unlink(tmpfil); 759 return (0); 760 } 761 } 762 fclose(fp); 763 printf("re-edit the label? [y]: "); fflush(stdout); 764 c = getchar(); 765 if (c != EOF && c != (int)'\n') 766 while (getchar() != (int)'\n') 767 ; 768 if (c == (int)'n') 769 break; 770 } 771 unlink(tmpfil); 772 return (1); 773 } 774 775 int 776 editit(void) 777 { 778 int pid, xpid; 779 int status, omask; 780 const char *ed; 781 782 omask = sigblock(sigmask(SIGINT)|sigmask(SIGQUIT)|sigmask(SIGHUP)); 783 while ((pid = fork()) < 0) { 784 if (errno == EPROCLIM) { 785 warnx("you have too many processes"); 786 return(0); 787 } 788 if (errno != EAGAIN) { 789 warn("fork"); 790 return(0); 791 } 792 sleep(1); 793 } 794 if (pid == 0) { 795 sigsetmask(omask); 796 setgid(getgid()); 797 setuid(getuid()); 798 if ((ed = getenv("EDITOR")) == NULL) 799 ed = DEFEDITOR; 800 execlp(ed, ed, tmpfil, NULL); 801 err(1, "%s", ed); 802 } 803 while ((xpid = wait(&status)) >= 0) 804 if (xpid == pid) 805 break; 806 sigsetmask(omask); 807 return(!status); 808 } 809 810 char * 811 skip(char *cp) 812 { 813 814 while (*cp != '\0' && isspace(*cp)) 815 cp++; 816 if (*cp == '\0' || *cp == '#') 817 return (NULL); 818 return (cp); 819 } 820 821 char * 822 word(char *cp) 823 { 824 char c; 825 826 while (*cp != '\0' && !isspace(*cp) && *cp != '#') 827 cp++; 828 if ((c = *cp) != '\0') { 829 *cp++ = '\0'; 830 if (c != '#') 831 return (skip(cp)); 832 } 833 return (NULL); 834 } 835 836 /* 837 * Read an ascii label in from fd f, 838 * in the same format as that put out by display(), 839 * and fill in lp. 840 */ 841 int 842 getasciilabel(FILE *f, struct disklabel32 *lp) 843 { 844 char *cp; 845 const char **cpp; 846 u_int part; 847 char *tp, line[BUFSIZ]; 848 u_long v; 849 int lineno = 0, errors = 0; 850 int i; 851 char empty[] = ""; 852 char unknown[] = "unknown"; 853 854 bzero(&part_set, sizeof(part_set)); 855 bzero(&part_size_type, sizeof(part_size_type)); 856 bzero(&part_offset_type, sizeof(part_offset_type)); 857 lp->d_bbsize = BBSIZE; /* XXX */ 858 lp->d_sbsize = SBSIZE; /* XXX */ 859 while (fgets(line, sizeof(line) - 1, f)) { 860 lineno++; 861 if ((cp = strchr(line,'\n')) != 0) 862 *cp = '\0'; 863 cp = skip(line); 864 if (cp == NULL) 865 continue; 866 tp = strchr(cp, ':'); 867 if (tp == NULL) { 868 fprintf(stderr, "line %d: syntax error\n", lineno); 869 errors++; 870 continue; 871 } 872 *tp++ = '\0', tp = skip(tp); 873 if (streq(cp, "type")) { 874 if (tp == NULL) 875 tp = unknown; 876 cpp = dktypenames; 877 for (; cpp < &dktypenames[DKMAXTYPES]; cpp++) { 878 if (*cpp && strcasecmp(*cpp, tp) == 0) { 879 lp->d_type = cpp - dktypenames; 880 break; 881 } 882 } 883 if (cpp < &dktypenames[DKMAXTYPES]) 884 continue; 885 v = strtoul(tp, NULL, 10); 886 if (v >= DKMAXTYPES) { 887 fprintf(stderr, "line %d:%s %lu\n", lineno, 888 "Warning, unknown disk type", v); 889 } 890 lp->d_type = v; 891 continue; 892 } 893 if (streq(cp, "flags")) { 894 for (v = 0; (cp = tp) && *cp != '\0';) { 895 tp = word(cp); 896 if (streq(cp, "removeable")) 897 v |= 0; /* obsolete */ 898 else if (streq(cp, "ecc")) 899 v |= 0; /* obsolete */ 900 else if (streq(cp, "badsect")) 901 v |= 0; /* obsolete */ 902 else { 903 fprintf(stderr, 904 "line %d: %s: bad flag\n", 905 lineno, cp); 906 errors++; 907 } 908 } 909 lp->d_flags = v; 910 continue; 911 } 912 if (streq(cp, "drivedata")) { 913 for (i = 0; (cp = tp) && *cp != '\0' && i < NDDATA32;) { 914 lp->d_drivedata[i++] = strtoul(cp, NULL, 10); 915 tp = word(cp); 916 } 917 continue; 918 } 919 if (sscanf(cp, "%lu partitions", &v) == 1) { 920 if (v == 0 || v > MAXPARTITIONS32) { 921 fprintf(stderr, 922 "line %d: bad # of partitions\n", lineno); 923 lp->d_npartitions = MAXPARTITIONS32; 924 errors++; 925 } else 926 lp->d_npartitions = v; 927 continue; 928 } 929 if (tp == NULL) 930 tp = empty; 931 if (streq(cp, "disk")) { 932 strncpy(lp->d_typename, tp, sizeof (lp->d_typename)); 933 continue; 934 } 935 if (streq(cp, "label")) { 936 strncpy(lp->d_packname, tp, sizeof (lp->d_packname)); 937 continue; 938 } 939 if (streq(cp, "bytes/sector")) { 940 v = strtoul(tp, NULL, 10); 941 if (v == 0 || (v % DEV_BSIZE) != 0) { 942 fprintf(stderr, 943 "line %d: %s: bad sector size\n", 944 lineno, tp); 945 errors++; 946 } else 947 lp->d_secsize = v; 948 continue; 949 } 950 if (streq(cp, "sectors/track")) { 951 v = strtoul(tp, NULL, 10); 952 #if (ULONG_MAX != 0xffffffffUL) 953 if (v == 0 || v > 0xffffffff) { 954 #else 955 if (v == 0) { 956 #endif 957 fprintf(stderr, "line %d: %s: bad %s\n", 958 lineno, tp, cp); 959 errors++; 960 } else 961 lp->d_nsectors = v; 962 continue; 963 } 964 if (streq(cp, "sectors/cylinder")) { 965 v = strtoul(tp, NULL, 10); 966 if (v == 0) { 967 fprintf(stderr, "line %d: %s: bad %s\n", 968 lineno, tp, cp); 969 errors++; 970 } else 971 lp->d_secpercyl = v; 972 continue; 973 } 974 if (streq(cp, "tracks/cylinder")) { 975 v = strtoul(tp, NULL, 10); 976 if (v == 0) { 977 fprintf(stderr, "line %d: %s: bad %s\n", 978 lineno, tp, cp); 979 errors++; 980 } else 981 lp->d_ntracks = v; 982 continue; 983 } 984 if (streq(cp, "cylinders")) { 985 v = strtoul(tp, NULL, 10); 986 if (v == 0) { 987 fprintf(stderr, "line %d: %s: bad %s\n", 988 lineno, tp, cp); 989 errors++; 990 } else 991 lp->d_ncylinders = v; 992 continue; 993 } 994 if (streq(cp, "sectors/unit")) { 995 v = strtoul(tp, NULL, 10); 996 if (v == 0) { 997 fprintf(stderr, "line %d: %s: bad %s\n", 998 lineno, tp, cp); 999 errors++; 1000 } else 1001 lp->d_secperunit = v; 1002 continue; 1003 } 1004 if (streq(cp, "rpm")) { 1005 v = strtoul(tp, NULL, 10); 1006 if (v == 0 || v > USHRT_MAX) { 1007 fprintf(stderr, "line %d: %s: bad %s\n", 1008 lineno, tp, cp); 1009 errors++; 1010 } else 1011 lp->d_rpm = v; 1012 continue; 1013 } 1014 if (streq(cp, "interleave")) { 1015 v = strtoul(tp, NULL, 10); 1016 if (v == 0 || v > USHRT_MAX) { 1017 fprintf(stderr, "line %d: %s: bad %s\n", 1018 lineno, tp, cp); 1019 errors++; 1020 } else 1021 lp->d_interleave = v; 1022 continue; 1023 } 1024 if (streq(cp, "trackskew")) { 1025 v = strtoul(tp, NULL, 10); 1026 if (v > USHRT_MAX) { 1027 fprintf(stderr, "line %d: %s: bad %s\n", 1028 lineno, tp, cp); 1029 errors++; 1030 } else 1031 lp->d_trackskew = v; 1032 continue; 1033 } 1034 if (streq(cp, "cylinderskew")) { 1035 v = strtoul(tp, NULL, 10); 1036 if (v > USHRT_MAX) { 1037 fprintf(stderr, "line %d: %s: bad %s\n", 1038 lineno, tp, cp); 1039 errors++; 1040 } else 1041 lp->d_cylskew = v; 1042 continue; 1043 } 1044 if (streq(cp, "headswitch")) { 1045 v = strtoul(tp, NULL, 10); 1046 lp->d_headswitch = v; 1047 continue; 1048 } 1049 if (streq(cp, "track-to-track seek")) { 1050 v = strtoul(tp, NULL, 10); 1051 lp->d_trkseek = v; 1052 continue; 1053 } 1054 /* the ':' was removed above */ 1055 if (*cp < 'a' || *cp > MAX_PART || cp[1] != '\0') { 1056 fprintf(stderr, 1057 "line %d: %s: Unknown disklabel field\n", lineno, 1058 cp); 1059 errors++; 1060 continue; 1061 } 1062 1063 /* Process a partition specification line. */ 1064 part = *cp - 'a'; 1065 if (part >= lp->d_npartitions) { 1066 fprintf(stderr, 1067 "line %d: partition name out of range a-%c: %s\n", 1068 lineno, 'a' + lp->d_npartitions - 1, cp); 1069 errors++; 1070 continue; 1071 } 1072 part_set[part] = 1; 1073 1074 if (getasciipartspec(tp, lp, part, lineno) != 0) { 1075 errors++; 1076 break; 1077 } 1078 } 1079 errors += checklabel(lp); 1080 return (errors == 0); 1081 } 1082 1083 #define NXTNUM(n) do { \ 1084 if (tp == NULL) { \ 1085 fprintf(stderr, "line %d: too few numeric fields\n", lineno); \ 1086 return (1); \ 1087 } else { \ 1088 cp = tp, tp = word(cp); \ 1089 (n) = strtoul(cp, NULL, 10); \ 1090 } \ 1091 } while (0) 1092 1093 /* retain 1 character following number */ 1094 #define NXTWORD(w,n) do { \ 1095 if (tp == NULL) { \ 1096 fprintf(stderr, "line %d: too few numeric fields\n", lineno); \ 1097 return (1); \ 1098 } else { \ 1099 char *tmp; \ 1100 cp = tp, tp = word(cp); \ 1101 (n) = strtoul(cp, &tmp, 10); \ 1102 if (tmp) (w) = *tmp; \ 1103 } \ 1104 } while (0) 1105 1106 /* 1107 * Read a partition line into partition `part' in the specified disklabel. 1108 * Return 0 on success, 1 on failure. 1109 */ 1110 int 1111 getasciipartspec(char *tp, struct disklabel32 *lp, int part, int lineno) 1112 { 1113 struct partition32 *pp; 1114 char *cp; 1115 const char **cpp; 1116 u_long v; 1117 1118 pp = &lp->d_partitions[part]; 1119 cp = NULL; 1120 1121 /* 1122 * size 1123 */ 1124 v = 0; 1125 NXTWORD(part_size_type[part],v); 1126 if (v == 0 && part_size_type[part] != '*') { 1127 fprintf(stderr, 1128 "line %d: %s: bad partition size\n", lineno, cp); 1129 return (1); 1130 } 1131 pp->p_size = v; 1132 1133 /* 1134 * offset 1135 */ 1136 v = 0; 1137 NXTWORD(part_offset_type[part],v); 1138 if (v == 0 && part_offset_type[part] != '*' && 1139 part_offset_type[part] != '\0') { 1140 fprintf(stderr, 1141 "line %d: %s: bad partition offset\n", lineno, cp); 1142 return (1); 1143 } 1144 pp->p_offset = v; 1145 1146 /* 1147 * fstype 1148 */ 1149 if (tp == NULL) { 1150 fprintf(stderr, 1151 "line %d: no filesystem type was specified\n", lineno); 1152 return(1); 1153 } 1154 cp = tp; 1155 tp = word(cp); 1156 for (cpp = fstypenames; cpp < &fstypenames[FSMAXTYPES]; cpp++) { 1157 if (*cpp && strcasecmp(*cpp, cp) == 0) 1158 break; 1159 } 1160 if (*cpp != NULL) { 1161 pp->p_fstype = cpp - fstypenames; 1162 } else { 1163 if (isdigit(*cp)) 1164 v = strtoul(cp, NULL, 10); 1165 else 1166 v = FSMAXTYPES; 1167 if (v >= FSMAXTYPES) { 1168 fprintf(stderr, 1169 "line %d: Warning, unknown filesystem type %s\n", 1170 lineno, cp); 1171 v = FS_UNUSED; 1172 } 1173 pp->p_fstype = v; 1174 } 1175 1176 pp->p_fsize = 0; 1177 pp->p_frag = 0; 1178 pp->p_cpg = 0; 1179 1180 cp = tp; 1181 if (tp) { 1182 fprintf(stderr, "line %d: Warning, fragment, block, " 1183 "and bps/cpg fields are no\n" 1184 "longer supported and must be specified " 1185 "via newfs options instead.\n", 1186 lineno); 1187 } 1188 return(0); 1189 } 1190 1191 /* 1192 * Check disklabel for errors and fill in 1193 * derived fields according to supplied values. 1194 */ 1195 int 1196 checklabel(struct disklabel32 *lp) 1197 { 1198 struct partition32 *pp; 1199 int i, errors = 0; 1200 char part; 1201 u_long base_offset, needed, total_size, total_percent, current_offset; 1202 long free_space; 1203 int seen_default_offset; 1204 int hog_part; 1205 int j; 1206 struct partition32 *pp2; 1207 1208 if (lp->d_secsize == 0) { 1209 fprintf(stderr, "sector size 0\n"); 1210 return (1); 1211 } 1212 if (lp->d_nsectors == 0) { 1213 fprintf(stderr, "sectors/track 0\n"); 1214 return (1); 1215 } 1216 if (lp->d_ntracks == 0) { 1217 fprintf(stderr, "tracks/cylinder 0\n"); 1218 return (1); 1219 } 1220 if (lp->d_ncylinders == 0) { 1221 fprintf(stderr, "cylinders/unit 0\n"); 1222 errors++; 1223 } 1224 if (lp->d_rpm == 0) 1225 Warning("revolutions/minute 0"); 1226 if (lp->d_secpercyl == 0) 1227 lp->d_secpercyl = lp->d_nsectors * lp->d_ntracks; 1228 if (lp->d_secperunit == 0) 1229 lp->d_secperunit = lp->d_secpercyl * lp->d_ncylinders; 1230 if (lp->d_bbsize == 0) { 1231 fprintf(stderr, "boot block size 0\n"); 1232 errors++; 1233 } else if (lp->d_bbsize % lp->d_secsize) 1234 Warning("boot block size %% sector-size != 0"); 1235 if (lp->d_sbsize == 0) { 1236 fprintf(stderr, "super block size 0\n"); 1237 errors++; 1238 } else if (lp->d_sbsize % lp->d_secsize) 1239 Warning("super block size %% sector-size != 0"); 1240 if (lp->d_npartitions > MAXPARTITIONS32) 1241 Warning("number of partitions (%lu) > MAXPARTITIONS (%d)", 1242 (u_long)lp->d_npartitions, MAXPARTITIONS32); 1243 1244 /* first allocate space to the partitions, then offsets */ 1245 total_size = 0; /* in sectors */ 1246 total_percent = 0; /* in percent */ 1247 hog_part = -1; 1248 /* find all fixed partitions */ 1249 for (i = 0; i < lp->d_npartitions; i++) { 1250 pp = &lp->d_partitions[i]; 1251 if (part_set[i]) { 1252 1253 if (part_size_type[i] == '*') { 1254 if (i == RAW_PART) { 1255 pp->p_size = lp->d_secperunit; 1256 } else { 1257 if (part_offset_type[i] != '*') { 1258 if (total_size < pp->p_offset) 1259 total_size = pp->p_offset; 1260 } 1261 if (hog_part != -1) 1262 Warning("Too many '*' partitions (%c and %c)", 1263 hog_part + 'a',i + 'a'); 1264 else 1265 hog_part = i; 1266 } 1267 } else { 1268 off_t size; 1269 1270 size = pp->p_size; 1271 switch (part_size_type[i]) { 1272 case '%': 1273 total_percent += size; 1274 break; 1275 case 'k': 1276 case 'K': 1277 size *= 1024ULL; 1278 break; 1279 case 'm': 1280 case 'M': 1281 size *= 1024ULL * 1024ULL; 1282 break; 1283 case 'g': 1284 case 'G': 1285 size *= 1024ULL * 1024ULL * 1024ULL; 1286 break; 1287 case '\0': 1288 break; 1289 default: 1290 Warning("unknown size specifier '%c' (K/M/G are valid)",part_size_type[i]); 1291 break; 1292 } 1293 /* don't count %'s yet */ 1294 if (part_size_type[i] != '%') { 1295 /* 1296 * for all not in sectors, convert to 1297 * sectors 1298 */ 1299 if (part_size_type[i] != '\0') { 1300 if (size % lp->d_secsize != 0) 1301 Warning("partition %c not an integer number of sectors", 1302 i + 'a'); 1303 size /= lp->d_secsize; 1304 pp->p_size = size; 1305 } 1306 /* else already in sectors */ 1307 if (i != RAW_PART) 1308 total_size += size; 1309 } 1310 } 1311 } 1312 } 1313 1314 /* Find out the total free space, excluding the boot block area. */ 1315 base_offset = BBSIZE / lp->d_secsize; 1316 free_space = 0; 1317 for (i = 0; i < lp->d_npartitions; i++) { 1318 pp = &lp->d_partitions[i]; 1319 if (!part_set[i] || i == RAW_PART || 1320 part_size_type[i] == '%' || part_size_type[i] == '*') 1321 continue; 1322 if (pp->p_offset > base_offset) 1323 free_space += pp->p_offset - base_offset; 1324 if (pp->p_offset + pp->p_size > base_offset) 1325 base_offset = pp->p_offset + pp->p_size; 1326 } 1327 if (base_offset < lp->d_secperunit) 1328 free_space += lp->d_secperunit - base_offset; 1329 1330 /* handle % partitions - note %'s don't need to add up to 100! */ 1331 if (total_percent != 0) { 1332 if (total_percent > 100) { 1333 fprintf(stderr,"total percentage %lu is greater than 100\n", 1334 total_percent); 1335 errors++; 1336 } 1337 1338 if (free_space > 0) { 1339 for (i = 0; i < lp->d_npartitions; i++) { 1340 pp = &lp->d_partitions[i]; 1341 if (part_set[i] && part_size_type[i] == '%') { 1342 /* careful of overflows! and integer roundoff */ 1343 pp->p_size = ((double)pp->p_size/100) * free_space; 1344 total_size += pp->p_size; 1345 1346 /* FIX we can lose a sector or so due to roundoff per 1347 partition. A more complex algorithm could avoid that */ 1348 } 1349 } 1350 } else { 1351 fprintf(stderr, 1352 "%ld sectors available to give to '*' and '%%' partitions\n", 1353 free_space); 1354 errors++; 1355 /* fix? set all % partitions to size 0? */ 1356 } 1357 } 1358 /* give anything remaining to the hog partition */ 1359 if (hog_part != -1) { 1360 /* 1361 * Find the range of offsets usable by '*' partitions around 1362 * the hog partition and how much space they need. 1363 */ 1364 needed = 0; 1365 base_offset = BBSIZE / lp->d_secsize; 1366 for (i = hog_part - 1; i >= 0; i--) { 1367 pp = &lp->d_partitions[i]; 1368 if (!part_set[i] || i == RAW_PART) 1369 continue; 1370 if (part_offset_type[i] == '*') { 1371 needed += pp->p_size; 1372 continue; 1373 } 1374 base_offset = pp->p_offset + pp->p_size; 1375 break; 1376 } 1377 current_offset = lp->d_secperunit; 1378 for (i = lp->d_npartitions - 1; i > hog_part; i--) { 1379 pp = &lp->d_partitions[i]; 1380 if (!part_set[i] || i == RAW_PART) 1381 continue; 1382 if (part_offset_type[i] == '*') { 1383 needed += pp->p_size; 1384 continue; 1385 } 1386 current_offset = pp->p_offset; 1387 } 1388 1389 if (current_offset - base_offset <= needed) { 1390 fprintf(stderr, "Cannot find space for partition %c\n", 1391 hog_part + 'a'); 1392 fprintf(stderr, 1393 "Need more than %lu sectors between %lu and %lu\n", 1394 needed, base_offset, current_offset); 1395 errors++; 1396 lp->d_partitions[hog_part].p_size = 0; 1397 } else { 1398 lp->d_partitions[hog_part].p_size = current_offset - 1399 base_offset - needed; 1400 total_size += lp->d_partitions[hog_part].p_size; 1401 } 1402 } 1403 1404 /* Now set the offsets for each partition */ 1405 current_offset = BBSIZE / lp->d_secsize; /* in sectors */ 1406 seen_default_offset = 0; 1407 for (i = 0; i < lp->d_npartitions; i++) { 1408 part = 'a' + i; 1409 pp = &lp->d_partitions[i]; 1410 if (part_set[i]) { 1411 if (part_offset_type[i] == '*') { 1412 if (i == RAW_PART) { 1413 pp->p_offset = 0; 1414 } else { 1415 pp->p_offset = current_offset; 1416 seen_default_offset = 1; 1417 } 1418 } else { 1419 /* allow them to be out of order for old-style tables */ 1420 if (pp->p_offset < current_offset && 1421 seen_default_offset && i != RAW_PART && 1422 pp->p_fstype != FS_VINUM) { 1423 fprintf(stderr, 1424 "Offset %ld for partition %c overlaps previous partition which ends at %lu\n", 1425 (long)pp->p_offset,i+'a',current_offset); 1426 fprintf(stderr, 1427 "Labels with any *'s for offset must be in ascending order by sector\n"); 1428 errors++; 1429 } else if (pp->p_offset != current_offset && 1430 i != RAW_PART && seen_default_offset) { 1431 /* 1432 * this may give unneeded warnings if 1433 * partitions are out-of-order 1434 */ 1435 Warning( 1436 "Offset %ld for partition %c doesn't match expected value %ld", 1437 (long)pp->p_offset, i + 'a', current_offset); 1438 } 1439 } 1440 if (i != RAW_PART) 1441 current_offset = pp->p_offset + pp->p_size; 1442 } 1443 } 1444 1445 for (i = 0; i < lp->d_npartitions; i++) { 1446 part = 'a' + i; 1447 pp = &lp->d_partitions[i]; 1448 if (pp->p_size == 0 && pp->p_offset != 0) 1449 Warning("partition %c: size 0, but offset %lu", 1450 part, (u_long)pp->p_offset); 1451 #ifdef notdef 1452 if (pp->p_size % lp->d_secpercyl) 1453 Warning("partition %c: size %% cylinder-size != 0", 1454 part); 1455 if (pp->p_offset % lp->d_secpercyl) 1456 Warning("partition %c: offset %% cylinder-size != 0", 1457 part); 1458 #endif 1459 if (pp->p_offset > lp->d_secperunit) { 1460 fprintf(stderr, 1461 "partition %c: offset past end of unit\n", part); 1462 errors++; 1463 } 1464 if (pp->p_offset + pp->p_size > lp->d_secperunit) { 1465 fprintf(stderr, 1466 "partition %c: partition extends past end of unit\n", 1467 part); 1468 errors++; 1469 } 1470 if (i == RAW_PART) 1471 { 1472 if (pp->p_fstype != FS_UNUSED) 1473 Warning("partition %c is not marked as unused!",part); 1474 if (pp->p_offset != 0) 1475 Warning("partition %c doesn't start at 0!",part); 1476 if (pp->p_size != lp->d_secperunit) 1477 Warning("partition %c doesn't cover the whole unit!",part); 1478 1479 if ((pp->p_fstype != FS_UNUSED) || (pp->p_offset != 0) || 1480 (pp->p_size != lp->d_secperunit)) { 1481 Warning("An incorrect partition %c may cause problems for " 1482 "standard system utilities",part); 1483 } 1484 } 1485 1486 /* check for overlaps */ 1487 /* this will check for all possible overlaps once and only once */ 1488 for (j = 0; j < i; j++) { 1489 pp2 = &lp->d_partitions[j]; 1490 if (j != RAW_PART && i != RAW_PART && 1491 pp->p_fstype != FS_VINUM && 1492 pp2->p_fstype != FS_VINUM && 1493 part_set[i] && part_set[j]) { 1494 if (pp2->p_offset < pp->p_offset + pp->p_size && 1495 (pp2->p_offset + pp2->p_size > pp->p_offset || 1496 pp2->p_offset >= pp->p_offset)) { 1497 fprintf(stderr,"partitions %c and %c overlap!\n", 1498 j + 'a', i + 'a'); 1499 errors++; 1500 } 1501 } 1502 } 1503 } 1504 for (; i < 8 || i < lp->d_npartitions; i++) { 1505 part = 'a' + i; 1506 pp = &lp->d_partitions[i]; 1507 if (pp->p_size || pp->p_offset) 1508 Warning("unused partition %c: size %d offset %lu", 1509 'a' + i, pp->p_size, (u_long)pp->p_offset); 1510 } 1511 return (errors); 1512 } 1513 1514 /* 1515 * When operating on a "virgin" disk, try getting an initial label 1516 * from the associated device driver. This might work for all device 1517 * drivers that are able to fetch some initial device parameters 1518 * without even having access to a (BSD) disklabel, like SCSI disks, 1519 * most IDE drives, or vn devices. 1520 */ 1521 static struct disklabel32 dlab; 1522 1523 struct disklabel32 * 1524 getvirginlabel(void) 1525 { 1526 struct partinfo info; 1527 struct disklabel32 *dl = &dlab; 1528 int f; 1529 1530 if ((f = open(dkname, O_RDONLY)) == -1) { 1531 warn("cannot open %s", dkname); 1532 return (NULL); 1533 } 1534 1535 /* 1536 * Check to see if the media is too big for a 32 bit disklabel. 1537 */ 1538 if (ioctl(f, DIOCGPART, &info) == 0) { 1539 if (info.media_size >= 0x100000000ULL * 512) { 1540 warnx("The media is too large for a 32 bit disklabel," 1541 " please use disklabel64."); 1542 return (NULL); 1543 } 1544 } 1545 1546 /* 1547 * Generate a virgin disklabel via ioctl 1548 */ 1549 if (ioctl(f, DIOCGDVIRGIN32, dl) < 0) { 1550 l_perror("ioctl DIOCGDVIRGIN32"); 1551 close(f); 1552 return(NULL); 1553 } 1554 close(f); 1555 return (dl); 1556 } 1557 1558 struct disklabel32 * 1559 getdisklabelfromdisktab(const char *name) 1560 { 1561 struct disktab *dt; 1562 struct disklabel32 *dl = &dlab; 1563 int i; 1564 1565 if ((dt = getdisktabbyname(name)) == NULL) 1566 return(NULL); 1567 dl->d_magic = DISKMAGIC32; 1568 dl->d_type = dt->d_typeid; 1569 dl->d_subtype = 0; 1570 dl->d_secsize = dt->d_media_blksize; 1571 dl->d_nsectors = dt->d_secpertrack; 1572 dl->d_ntracks = dt->d_nheads; 1573 dl->d_ncylinders = dt->d_ncylinders; 1574 dl->d_secpercyl = dt->d_secpercyl; 1575 dl->d_secperunit = dt->d_media_blocks; 1576 dl->d_rpm = dt->d_rpm; 1577 dl->d_interleave = dt->d_interleave; 1578 dl->d_trackskew = dt->d_trackskew; 1579 dl->d_cylskew = dt->d_cylskew; 1580 dl->d_headswitch = dt->d_headswitch; 1581 dl->d_trkseek = dt->d_trkseek; 1582 dl->d_magic2 = DISKMAGIC32; 1583 dl->d_npartitions = dt->d_npartitions; 1584 dl->d_bbsize = dt->d_bbsize; 1585 dl->d_sbsize = dt->d_sbsize; 1586 for (i = 0; i < dt->d_npartitions; ++i) { 1587 struct partition32 *dlp = &dl->d_partitions[i]; 1588 struct dt_partition *dtp = &dt->d_partitions[i]; 1589 1590 dlp->p_size = dtp->p_size; 1591 dlp->p_offset = dtp->p_offset; 1592 dlp->p_fsize = dtp->p_fsize; 1593 dlp->p_fstype = dtp->p_fstype; 1594 dlp->p_frag = dtp->p_fsize; 1595 } 1596 return(dl); 1597 } 1598 1599 /* 1600 * If we are installing a boot program that doesn't fit in d_bbsize 1601 * we need to mark those partitions that the boot overflows into. 1602 * This allows newfs to prevent creation of a filesystem where it might 1603 * clobber bootstrap code. 1604 */ 1605 void 1606 setbootflag(struct disklabel32 *lp) 1607 { 1608 struct partition32 *pp; 1609 int i, errors = 0; 1610 char part; 1611 u_long boffset; 1612 1613 if (bootbuf == 0) 1614 return; 1615 boffset = bootsize / lp->d_secsize; 1616 for (i = 0; i < lp->d_npartitions; i++) { 1617 part = 'a' + i; 1618 pp = &lp->d_partitions[i]; 1619 if (pp->p_size == 0) 1620 continue; 1621 if (boffset <= pp->p_offset) { 1622 if (pp->p_fstype == FS_BOOT) 1623 pp->p_fstype = FS_UNUSED; 1624 } else if (pp->p_fstype != FS_BOOT) { 1625 if (pp->p_fstype != FS_UNUSED) { 1626 fprintf(stderr, 1627 "boot overlaps used partition %c\n", 1628 part); 1629 errors++; 1630 } else { 1631 pp->p_fstype = FS_BOOT; 1632 Warning("boot overlaps partition %c, %s", 1633 part, "marked as FS_BOOT"); 1634 } 1635 } 1636 } 1637 if (errors) 1638 errx(4, "cannot install boot program"); 1639 } 1640 1641 /*VARARGS1*/ 1642 void 1643 Warning(const char *fmt, ...) 1644 { 1645 va_list ap; 1646 1647 fprintf(stderr, "Warning, "); 1648 va_start(ap, fmt); 1649 vfprintf(stderr, fmt, ap); 1650 fprintf(stderr, "\n"); 1651 va_end(ap); 1652 } 1653 1654 /* 1655 * Check to see if the bootblocks are in the wrong place. FBsd5 bootblocks 1656 * and earlier DFly bb's are packed against the old disklabel and a new 1657 * disklabel would blow them up. This is a hack that should be removed 1658 * in 2006 sometime (if ever). 1659 */ 1660 1661 int 1662 checkoldboot(int f, const char *bootbuffer) 1663 { 1664 char buf[BBSIZE]; 1665 1666 if (bootbuffer && strncmp(bootbuffer + 0x402, "BTX", 3) == 0) 1667 return(0); 1668 lseek(f, (off_t)0, SEEK_SET); 1669 if (read(f, buf, sizeof(buf)) != sizeof(buf)) 1670 return(0); 1671 if (strncmp(buf + 0x402, "BTX", 3) == 0) /* new location */ 1672 return(0); 1673 if (strncmp(buf + 0x316, "BTX", 3) == 0) /* old location */ 1674 return(1); 1675 return(0); 1676 } 1677 1678 /* 1679 * Traditional 32 bit disklabels actually use absolute sector numbers on 1680 * disk, NOT slice relative sector numbres. The OS hides this from us 1681 * when we use DIOC ioctls to access the label, but newer versions of 1682 * Dragonfly no longer adjusts the disklabel when snooping reads or writes 1683 * so we have to figure it out ourselves. 1684 */ 1685 const char * 1686 fixlabel(int f, struct disklabel32 *lp, int writeadj) 1687 { 1688 const char *msg = NULL; 1689 struct partinfo info; 1690 struct partition32 *pp; 1691 u_int64_t start; 1692 u_int64_t end; 1693 u_int64_t offset; 1694 int part; 1695 int rev; 1696 size_t rev_len = sizeof(rev); 1697 1698 if (sysctlbyname("kern.osrevision", &rev, &rev_len, NULL, 0) < 0) { 1699 errx(1, "Cannot use raw mode on non-DragonFly systems\n"); 1700 } 1701 if (rev < 200701) { 1702 warnx("Warning running new disklabel on old DragonFly systems,\n" 1703 "assuming the disk layer will fixup the label.\n"); 1704 sleep(3); 1705 return(NULL); 1706 } 1707 1708 pp = &lp->d_partitions[RAW_PART]; 1709 1710 if (forceflag) { 1711 info.media_offset = slice_start_lba * lp->d_secsize; 1712 info.media_blocks = pp->p_size; 1713 info.media_blksize = lp->d_secsize; 1714 } else if (ioctl(f, DIOCGPART, &info) < 0) { 1715 msg = "Unable to extract the slice starting LBA, " 1716 "you must use the -f <slice_start_lba> option\n" 1717 "to specify it manually, or perhaps try without " 1718 "using -r and let the kernel deal with it\n"; 1719 return(msg); 1720 } 1721 1722 if (lp->d_magic != DISKMAGIC32 || lp->d_magic2 != DISKMAGIC32) 1723 return ("fixlabel: invalid magic"); 1724 if (dkcksum32(lp) != 0) 1725 return ("fixlabel: invalid checksum"); 1726 1727 /* 1728 * What a mess. For ages old backwards compatibility the disklabel 1729 * on-disk stores absolute offsets instead of slice-relative offsets. 1730 * So fix it up when reading, writing, or snooping. 1731 * 1732 * The in-core label is always slice-relative. 1733 */ 1734 if (writeadj) { 1735 /* 1736 * incore -> disk 1737 */ 1738 start = 0; 1739 offset = info.media_offset / info.media_blksize; 1740 } else { 1741 /* 1742 * disk -> incore 1743 */ 1744 start = info.media_offset / info.media_blksize; 1745 offset = -info.media_offset / info.media_blksize; 1746 } 1747 if (pp->p_offset != start) 1748 return ("fixlabel: raw partition offset != slice offset"); 1749 if (pp->p_size != info.media_blocks) { 1750 if (pp->p_size > info.media_blocks) 1751 return ("fixlabel: raw partition size > slice size"); 1752 } 1753 end = start + info.media_blocks; 1754 if (start > end) 1755 return ("fixlabel: slice wraps"); 1756 if (lp->d_secpercyl <= 0) 1757 return ("fixlabel: d_secpercyl <= 0"); 1758 pp -= RAW_PART; 1759 for (part = 0; part < lp->d_npartitions; part++, pp++) { 1760 if (pp->p_offset != 0 || pp->p_size != 0) { 1761 if (pp->p_offset < start 1762 || pp->p_offset + pp->p_size > end 1763 || pp->p_offset + pp->p_size < pp->p_offset) { 1764 /* XXX else silently discard junk. */ 1765 bzero(pp, sizeof *pp); 1766 } else { 1767 pp->p_offset += offset; 1768 } 1769 } 1770 } 1771 lp->d_checksum = 0; 1772 lp->d_checksum = dkcksum32(lp); 1773 return (NULL); 1774 } 1775 1776 void 1777 usage(void) 1778 { 1779 #if NUMBOOT > 0 1780 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", 1781 "usage: disklabel32 [-r] disk", 1782 "\t\t(to read label)", 1783 " disklabel32 -w [-r] [-n] disk type [packid]", 1784 "\t\t(to write label with existing boot program)", 1785 " disklabel32 -e [-r] [-n] disk", 1786 "\t\t(to edit label)", 1787 " disklabel32 -R [-r] [-n] disk protofile", 1788 "\t\t(to restore label with existing boot program)", 1789 #if NUMBOOT > 1 1790 " disklabel32 -B [-n] [-b boot1 -s boot2] disk [type]", 1791 "\t\t(to install boot program with existing label)", 1792 " disklabel32 -w -B [-n] [-b boot1 -s boot2] disk type [packid]", 1793 "\t\t(to write label and boot program)", 1794 " disklabel32 -R -B [-n] [-b boot1 -s boot2] disk protofile [type]", 1795 "\t\t(to restore label and boot program)", 1796 #else 1797 " disklabel32 -B [-n] [-b bootprog] disk [type]", 1798 "\t\t(to install boot program with existing on-disk label)", 1799 " disklabel32 -w -B [-n] [-b bootprog] disk type [packid]", 1800 "\t\t(to write label and install boot program)", 1801 " disklabel32 -R -B [-n] [-b bootprog] disk protofile [type]", 1802 "\t\t(to restore label and install boot program)", 1803 #endif 1804 " disklabel32 [-NW] disk", 1805 "\t\t(to write disable/enable label)"); 1806 #else 1807 fprintf(stderr, "%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n", 1808 "usage: disklabel32 [-r] disk", "(to read label)", 1809 " disklabel32 -w [-r] [-n] disk type [packid]", 1810 "\t\t(to write label)", 1811 " disklabel32 -e [-r] [-n] disk", 1812 "\t\t(to edit label)", 1813 " disklabel32 -R [-r] [-n] disk protofile", 1814 "\t\t(to restore label)", 1815 " disklabel32 [-NW] disk", 1816 "\t\t(to write disable/enable label)"); 1817 #endif 1818 fprintf(stderr, "%s\n%s\n", 1819 " disklabel32 [-f slice_start_lba] [options]", 1820 "\t\t(to force using manual offset)"); 1821 exit(1); 1822 } 1823