1 /* $NetBSD: disksubr.c,v 1.23 2001/09/16 16:34:28 wiz Exp $ */ 2 3 /* 4 * Copyright (c) 1995 Leo Weppelman. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by Leo Weppelman. 18 * 4. The name of the author may not be used to endorse or promote products 19 * derived from this software without specific prior written permission 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 #ifndef DISKLABEL_NBDA 34 #define DISKLABEL_NBDA /* required */ 35 #endif 36 37 #include "opt_compat_netbsd.h" 38 39 #include <sys/param.h> 40 #include <sys/systm.h> 41 #include <sys/buf.h> 42 #include <ufs/ufs/dinode.h> 43 #include <ufs/ffs/fs.h> 44 #include <sys/disk.h> 45 #include <sys/disklabel.h> 46 #include <machine/ahdilabel.h> 47 48 /* 49 * BBSIZE in <ufs/ffs/fs.h> must be greater than 50 * or equal to BBMINSIZE in <machine/disklabel.h> 51 */ 52 #if BBSIZE < BBMINSIZE 53 #error BBSIZE smaller than BBMINSIZE 54 #endif 55 56 static void ck_label __P((struct disklabel *, struct cpu_disklabel *)); 57 static int bsd_label __P((dev_t, void (*)(struct buf *), 58 struct disklabel *, u_int, u_int *)); 59 static int ahdi_label __P((dev_t, void (*)(struct buf *), 60 struct disklabel *, struct cpu_disklabel *)); 61 static void ahdi_to_bsd __P((struct disklabel *, struct ahdi_ptbl *)); 62 static u_int ahdi_getparts __P((dev_t, void (*)(struct buf *), u_int, 63 u_int, u_int, struct ahdi_ptbl *)); 64 65 /* 66 * Determine the size of the transfer, and make sure it is 67 * within the boundaries of the partition. Adjust transfer 68 * if needed, and signal errors or early completion. 69 */ 70 int 71 bounds_check_with_label(bp, lp, wlabel) 72 struct buf *bp; 73 struct disklabel *lp; 74 int wlabel; 75 { 76 struct partition *pp; 77 u_int maxsz, sz; 78 79 pp = &lp->d_partitions[DISKPART(bp->b_dev)]; 80 if (bp->b_flags & B_RAW) { 81 if (bp->b_bcount & (lp->d_secsize - 1)) { 82 bp->b_error = EINVAL; 83 bp->b_flags |= B_ERROR; 84 return(-1); 85 } 86 if (lp->d_secsize < DEV_BSIZE) 87 maxsz = pp->p_size / (DEV_BSIZE / lp->d_secsize); 88 else maxsz = pp->p_size * (lp->d_secsize / DEV_BSIZE); 89 sz = (bp->b_bcount + DEV_BSIZE - 1) >> DEV_BSHIFT; 90 } else { 91 maxsz = pp->p_size; 92 sz = (bp->b_bcount + lp->d_secsize - 1) / lp->d_secsize; 93 } 94 95 if (bp->b_blkno < 0 || bp->b_blkno + sz > maxsz) { 96 if (bp->b_blkno == maxsz) { 97 /* 98 * trying to get one block beyond return EOF. 99 */ 100 bp->b_resid = bp->b_bcount; 101 return(0); 102 } 103 if (bp->b_blkno > maxsz || bp->b_blkno < 0) { 104 bp->b_error = EINVAL; 105 bp->b_flags |= B_ERROR; 106 return(-1); 107 } 108 sz = maxsz - bp->b_blkno; 109 110 /* 111 * adjust count down 112 */ 113 if (bp->b_flags & B_RAW) 114 bp->b_bcount = sz << DEV_BSHIFT; 115 else bp->b_bcount = sz * lp->d_secsize; 116 } 117 118 /* 119 * calc cylinder for disksort to order transfers with 120 */ 121 bp->b_cylinder = (bp->b_blkno + pp->p_offset) / lp->d_secpercyl; 122 return(1); 123 } 124 125 /* 126 * Attempt to read a disk label from a device using the 127 * indicated strategy routine. The label must be partly 128 * set up before this: 129 * secpercyl and anything required in the strategy routine 130 * (e.g. sector size) must be filled in before calling us. 131 * Returns NULL on success and an error string on failure. 132 */ 133 char * 134 readdisklabel(dev, strat, lp, clp) 135 dev_t dev; 136 void (*strat)(struct buf *); 137 struct disklabel *lp; 138 struct cpu_disklabel *clp; 139 { 140 int e; 141 142 if (clp != NULL) 143 bzero(clp, sizeof *clp); 144 else printf("Warning: clp == NULL\n"); 145 146 /* 147 * Give some guaranteed validity to the disk label. 148 */ 149 if (lp->d_secsize == 0) 150 lp->d_secsize = DEV_BSIZE; 151 if (lp->d_secperunit == 0) 152 lp->d_secperunit = 0x1fffffff; 153 if (lp->d_secpercyl == 0) 154 return("Zero secpercyl"); 155 156 /* 157 * Some parts of the kernel (see scsipi/cd.c for an example) 158 * assume that stuff they already had setup in d_partitions 159 * is still there after reading the disklabel. Hence the 160 * 'if 0' 161 */ 162 #if 0 163 bzero(lp->d_partitions, sizeof lp->d_partitions); 164 #endif 165 166 lp->d_partitions[RAW_PART].p_size = lp->d_secperunit; 167 lp->d_npartitions = RAW_PART + 1; 168 lp->d_bbsize = BBSIZE; 169 lp->d_sbsize = SBSIZE; 170 171 #ifdef DISKLABEL_NBDA 172 /* Try the native NetBSD/Atari format first. */ 173 e = bsd_label(dev, strat, lp, 0, clp != NULL ? &clp->cd_label : NULL); 174 #endif 175 #if 0 176 /* Other label formats go here. */ 177 if (e > 0) 178 e = foo_label(dev, strat, lp, ...); 179 #endif 180 #ifdef DISKLABEL_AHDI 181 /* The unprotected AHDI format comes last. */ 182 if (e > 0 && (clp != NULL)) 183 e = ahdi_label(dev, strat, lp, clp); 184 #endif 185 if (e < 0) 186 return("I/O error"); 187 188 /* Unknown format or unitialised volume? */ 189 if (e > 0) 190 uprintf("Warning: unknown disklabel format" 191 "- assuming empty disk\n"); 192 193 /* Calulate new checksum. */ 194 lp->d_magic = lp->d_magic2 = DISKMAGIC; 195 lp->d_checksum = 0; 196 lp->d_checksum = dkcksum(lp); 197 198 return(NULL); 199 } 200 201 /* 202 * Check new disk label for sensibility before setting it. 203 */ 204 int 205 setdisklabel(olp, nlp, openmask, clp) 206 struct disklabel *olp, *nlp; 207 u_long openmask; 208 struct cpu_disklabel *clp; 209 { 210 /* special case to allow disklabel to be invalidated */ 211 if (nlp->d_magic == 0xffffffff) { 212 *olp = *nlp; 213 return(0); 214 } 215 216 /* sanity clause */ 217 if (nlp->d_secpercyl == 0 || nlp->d_npartitions > MAXPARTITIONS 218 || nlp->d_secsize == 0 || (nlp->d_secsize % DEV_BSIZE) != 0 219 || nlp->d_magic != DISKMAGIC || nlp->d_magic2 != DISKMAGIC 220 || dkcksum(nlp) != 0) 221 return(EINVAL); 222 223 #ifdef DISKLABEL_AHDI 224 if (clp && clp->cd_bblock) 225 ck_label(nlp, clp); 226 #endif 227 while (openmask) { 228 struct partition *op, *np; 229 int i = ffs(openmask) - 1; 230 openmask &= ~(1 << i); 231 if (i >= nlp->d_npartitions) 232 return(EBUSY); 233 op = &olp->d_partitions[i]; 234 np = &nlp->d_partitions[i]; 235 if (np->p_offset != op->p_offset || np->p_size < op->p_size) 236 return(EBUSY); 237 /* 238 * Copy internally-set partition information 239 * if new label doesn't include it. XXX 240 */ 241 if (np->p_fstype == FS_UNUSED && op->p_fstype != FS_UNUSED) { 242 np->p_fstype = op->p_fstype; 243 np->p_fsize = op->p_fsize; 244 np->p_frag = op->p_frag; 245 np->p_cpg = op->p_cpg; 246 } 247 } 248 nlp->d_checksum = 0; 249 nlp->d_checksum = dkcksum(nlp); 250 *olp = *nlp; 251 return(0); 252 } 253 254 /* 255 * Write disk label back to device after modification. 256 */ 257 int 258 writedisklabel(dev, strat, lp, clp) 259 dev_t dev; 260 void (*strat)(struct buf *); 261 struct disklabel *lp; 262 struct cpu_disklabel *clp; 263 { 264 struct buf *bp; 265 u_int blk; 266 int rv; 267 268 blk = clp->cd_bblock; 269 if (blk == NO_BOOT_BLOCK) 270 return(ENXIO); 271 272 bp = geteblk(BBMINSIZE); 273 bp->b_dev = MAKEDISKDEV(major(dev), DISKUNIT(dev), RAW_PART); 274 bp->b_flags |= B_READ; 275 bp->b_bcount = BBMINSIZE; 276 bp->b_blkno = blk; 277 bp->b_cylinder = blk / lp->d_secpercyl; 278 (*strat)(bp); 279 rv = biowait(bp); 280 if (!rv) { 281 struct bootblock *bb = (struct bootblock *)bp->b_data; 282 /* 283 * Allthough the disk pack label may appear anywhere 284 * in the boot block while reading, it is always 285 * written at a fixed location. 286 */ 287 if (clp->cd_label != LABELOFFSET) { 288 clp->cd_label = LABELOFFSET; 289 bzero(bb, sizeof(*bb)); 290 } 291 bb->bb_magic = (blk == 0) ? NBDAMAGIC : AHDIMAGIC; 292 BBSETLABEL(bb, lp); 293 294 bp->b_flags &= ~(B_READ|B_DONE); 295 bp->b_flags |= B_WRITE; 296 bp->b_bcount = BBMINSIZE; 297 bp->b_blkno = blk; 298 bp->b_cylinder = blk / lp->d_secpercyl; 299 (*strat)(bp); 300 rv = biowait(bp); 301 } 302 brelse(bp); 303 return(rv); 304 } 305 306 /* 307 * Read bootblock at block `blkno' and check 308 * if it contains a valid NetBSD disk label. 309 * 310 * Returns: 0 if successfull, 311 * -1 if an I/O error occurred, 312 * +1 if no valid label was found. 313 */ 314 static int 315 bsd_label(dev, strat, label, blkno, offsetp) 316 dev_t dev; 317 void (*strat)(struct buf *); 318 struct disklabel *label; 319 u_int blkno, 320 *offsetp; 321 { 322 struct buf *bp; 323 int rv; 324 325 bp = geteblk(BBMINSIZE); 326 bp->b_dev = MAKEDISKDEV(major(dev), DISKUNIT(dev), RAW_PART); 327 bp->b_flags |= B_READ; 328 bp->b_bcount = BBMINSIZE; 329 bp->b_blkno = blkno; 330 bp->b_cylinder = blkno / label->d_secpercyl; 331 (*strat)(bp); 332 333 rv = -1; 334 if (!biowait(bp)) { 335 struct bootblock *bb; 336 u_int32_t *p, *end; 337 338 rv = 1; 339 bb = (struct bootblock *)bp->b_data; 340 end = (u_int32_t *)((char *)&bb[1] - sizeof(struct disklabel)); 341 for (p = (u_int32_t *)bb; p < end; ++p) { 342 struct disklabel *dl = (struct disklabel *)&p[1]; 343 /* 344 * Compatibility kludge: the boot block magic number is 345 * new in 1.1A, in previous versions the disklabel was 346 * stored at the end of the boot block (offset 7168). 347 */ 348 if ( ( (p[0] == NBDAMAGIC && blkno == 0) 349 || (p[0] == AHDIMAGIC && blkno != 0) 350 #ifdef COMPAT_11 351 || (char *)dl - (char *)bb == 7168 352 #endif 353 ) 354 && dl->d_npartitions <= MAXPARTITIONS 355 && dl->d_magic2 == DISKMAGIC 356 && dl->d_magic == DISKMAGIC 357 && dkcksum(dl) == 0 358 ) { 359 if (offsetp != NULL) 360 *offsetp = (char *)dl - (char *)bb; 361 *label = *dl; 362 rv = 0; 363 break; 364 } 365 } 366 } 367 brelse(bp); 368 return(rv); 369 } 370 371 #ifdef DISKLABEL_AHDI 372 /* 373 * Check for consistency between the NetBSD partition table 374 * and the AHDI auxiliary root sectors. There's no good reason 375 * to force such consistency, but issuing a warning may help 376 * an inexperienced sysadmin to prevent corruption of AHDI 377 * partitions. 378 */ 379 static void 380 ck_label(dl, cdl) 381 struct disklabel *dl; 382 struct cpu_disklabel *cdl; 383 { 384 u_int *rp, i; 385 386 for (i = 0; i < dl->d_npartitions; ++i) { 387 struct partition *p = &dl->d_partitions[i]; 388 if (i == RAW_PART || p->p_size == 0) 389 continue; 390 if ( (p->p_offset >= cdl->cd_bslst 391 && p->p_offset <= cdl->cd_bslend) 392 || (cdl->cd_bslst >= p->p_offset 393 && cdl->cd_bslst < p->p_offset + p->p_size)) { 394 uprintf("Warning: NetBSD partition %c includes" 395 " AHDI bad sector list\n", 'a'+i); 396 } 397 for (rp = &cdl->cd_roots[0]; *rp; ++rp) { 398 if (*rp >= p->p_offset 399 && *rp < p->p_offset + p->p_size) { 400 uprintf("Warning: NetBSD partition %c" 401 " includes AHDI auxiliary root\n", 'a'+i); 402 } 403 } 404 } 405 } 406 407 /* 408 * Check volume for the existance of an AHDI label. Fetch 409 * NetBSD label from NBD or RAW partition, or otherwise 410 * create a fake NetBSD label based on the AHDI label. 411 * 412 * Returns: 0 if successful, 413 * -1 if an I/O error occurred, 414 * +1 if no valid AHDI label was found. 415 */ 416 int 417 ahdi_label(dev, strat, dl, cdl) 418 dev_t dev; 419 void (*strat)(struct buf *); 420 struct disklabel *dl; 421 struct cpu_disklabel *cdl; 422 { 423 struct ahdi_ptbl apt; 424 u_int i; 425 int j; 426 427 /* 428 * The AHDI format requires a specific block size. 429 */ 430 if (dl->d_secsize != AHDI_BSIZE) 431 return(1); 432 433 /* 434 * Fetch the AHDI partition descriptors. 435 */ 436 apt.at_cdl = cdl; 437 apt.at_nroots = apt.at_nparts = 0; 438 i = ahdi_getparts(dev, strat, dl->d_secpercyl, 439 AHDI_BBLOCK, AHDI_BBLOCK, &apt); 440 if (i) { 441 if (i < dl->d_secperunit) 442 return(-1); /* disk read error */ 443 else return(1); /* reading past end of medium */ 444 } 445 446 /* 447 * Perform sanity checks. 448 */ 449 if (apt.at_bslst == 0 || apt.at_bslend == 0) { 450 /* 451 * Illegal according to Atari, however some hd-utils 452 * use it - notably ICD *sigh* 453 * Work around it..... 454 */ 455 apt.at_bslst = apt.at_bslend = 0; 456 uprintf("Warning: Illegal 'bad sector list' format" 457 "- assuming non exists\n"); 458 } 459 if (apt.at_hdsize == 0 || apt.at_nparts == 0) /* unlikely */ 460 return(1); 461 if (apt.at_nparts > AHDI_MAXPARTS) /* XXX kludge */ 462 return(-1); 463 for (i = 0; i < apt.at_nparts; ++i) { 464 struct ahdi_part *p1 = &apt.at_parts[i]; 465 466 for (j = 0; j < apt.at_nroots; ++j) { 467 u_int aux = apt.at_roots[j]; 468 if (aux >= p1->ap_st && aux <= p1->ap_end) 469 return(1); 470 } 471 for (j = i + 1; j < apt.at_nparts; ++j) { 472 struct ahdi_part *p2 = &apt.at_parts[j]; 473 if (p1->ap_st >= p2->ap_st && p1->ap_st <= p2->ap_end) 474 return(1); 475 if (p2->ap_st >= p1->ap_st && p2->ap_st <= p1->ap_end) 476 return(1); 477 } 478 if (p1->ap_st >= apt.at_bslst && p1->ap_st <= apt.at_bslend) 479 return(1); 480 if (apt.at_bslst >= p1->ap_st && apt.at_bslst <= p1->ap_end) 481 return(1); 482 } 483 484 /* 485 * Search for a NetBSD disk label 486 */ 487 apt.at_bblock = NO_BOOT_BLOCK; 488 for (i = 0; i < apt.at_nparts; ++i) { 489 struct ahdi_part *pd = &apt.at_parts[i]; 490 u_int id = *((u_int32_t *)&pd->ap_flg); 491 if (id == AHDI_PID_NBD || id == AHDI_PID_RAW) { 492 u_int blkno = pd->ap_st; 493 j = bsd_label(dev, strat, dl, blkno, &apt.at_label); 494 if (j < 0) { 495 return(j); /* I/O error */ 496 } 497 if (!j) { 498 apt.at_bblock = blkno; /* got it */ 499 ck_label(dl, cdl); 500 return(0); 501 } 502 /* 503 * Not yet, but if this is the first NBD partition 504 * on this volume, we'll mark it anyway as a possible 505 * destination for future writedisklabel() calls, just 506 * in case there is no valid disk label on any of the 507 * other AHDI partitions. 508 */ 509 if (id == AHDI_PID_NBD 510 && apt.at_bblock == NO_BOOT_BLOCK) 511 apt.at_bblock = blkno; 512 } 513 } 514 515 /* 516 * No NetBSD disk label on this volume, use the AHDI 517 * label to create a fake BSD label. If there is no 518 * NBD partition on this volume either, subsequent 519 * writedisklabel() calls will fail. 520 */ 521 ahdi_to_bsd(dl, &apt); 522 return(0); 523 } 524 525 /* 526 * Map the AHDI partition table to the NetBSD table. 527 * 528 * This means: 529 * Part 0 : Root 530 * Part 1 : Swap 531 * Part 2 : Whole disk 532 * Part 3.. : User partitions 533 * 534 * When more than one root partition is found, only the first one will 535 * be recognized as such. The others are mapped as user partitions. 536 */ 537 static void 538 ahdi_to_bsd(dl, apt) 539 struct disklabel *dl; 540 struct ahdi_ptbl *apt; 541 { 542 int i, have_root, user_part; 543 544 user_part = RAW_PART; 545 have_root = (apt->at_bblock != NO_BOOT_BLOCK); 546 547 for (i = 0; i < apt->at_nparts; ++i) { 548 struct ahdi_part *pd = &apt->at_parts[i]; 549 int fst, pno = -1; 550 551 switch (*((u_int32_t *)&pd->ap_flg)) { 552 case AHDI_PID_NBD: 553 /* 554 * If this partition has been marked as the 555 * first NBD partition, it will be the root 556 * partition. 557 */ 558 if (pd->ap_st == apt->at_bblock) 559 pno = 0; 560 /* FALL THROUGH */ 561 case AHDI_PID_NBR: 562 /* 563 * If there is no NBD partition and this is 564 * the first NBR partition, it will be the 565 * root partition. 566 */ 567 if (!have_root) { 568 have_root = 1; 569 pno = 0; 570 } 571 /* FALL THROUGH */ 572 case AHDI_PID_NBU: 573 fst = FS_BSDFFS; 574 break; 575 case AHDI_PID_NBS: 576 case AHDI_PID_SWP: 577 if (dl->d_partitions[1].p_size == 0) 578 pno = 1; 579 fst = FS_SWAP; 580 break; 581 case AHDI_PID_BGM: 582 case AHDI_PID_GEM: 583 fst = FS_MSDOS; 584 break; 585 default: 586 fst = FS_OTHER; 587 break; 588 } 589 if (pno < 0) { 590 if((pno = user_part + 1) >= MAXPARTITIONS) 591 continue; 592 user_part = pno; 593 } 594 dl->d_partitions[pno].p_size = pd->ap_end - pd->ap_st + 1; 595 dl->d_partitions[pno].p_offset = pd->ap_st; 596 dl->d_partitions[pno].p_fstype = fst; 597 } 598 dl->d_npartitions = user_part + 1; 599 } 600 601 /* 602 * Fetch the AHDI partitions and auxiliary roots. 603 * 604 * Returns: 0 if successful, 605 * otherwise an I/O error occurred, and the 606 * number of the offending block is returned. 607 */ 608 static u_int 609 ahdi_getparts(dev, strat, secpercyl, rsec, esec, apt) 610 dev_t dev; 611 void (*strat)(struct buf *); 612 u_int secpercyl, 613 rsec, esec; 614 struct ahdi_ptbl *apt; 615 { 616 struct ahdi_part *part, *end; 617 struct ahdi_root *root; 618 struct buf *bp; 619 u_int rv; 620 621 bp = geteblk(AHDI_BSIZE); 622 bp->b_dev = MAKEDISKDEV(major(dev), DISKUNIT(dev), RAW_PART); 623 bp->b_flags |= B_READ; 624 bp->b_bcount = AHDI_BSIZE; 625 bp->b_blkno = rsec; 626 bp->b_cylinder = rsec / secpercyl; 627 (*strat)(bp); 628 if (biowait(bp)) { 629 rv = rsec + (rsec == 0); 630 goto done; 631 } 632 root = (struct ahdi_root *)bp->b_data; 633 634 if (rsec == AHDI_BBLOCK) 635 end = &root->ar_parts[AHDI_MAXRPD]; 636 else end = &root->ar_parts[AHDI_MAXARPD]; 637 for (part = root->ar_parts; part < end; ++part) { 638 u_int id = *((u_int32_t *)&part->ap_flg); 639 if (!(id & 0x01000000)) 640 continue; 641 if ((id &= 0x00ffffff) == AHDI_PID_XGM) { 642 u_int offs = part->ap_st + esec; 643 if (apt->at_nroots < AHDI_MAXROOTS) 644 apt->at_roots[apt->at_nroots] = offs; 645 apt->at_nroots += 1; 646 rv = ahdi_getparts(dev, strat, secpercyl, offs, 647 (esec == AHDI_BBLOCK) ? offs : esec, apt); 648 if (rv) 649 goto done; 650 continue; 651 } 652 else if (apt->at_nparts < AHDI_MAXPARTS) { 653 struct ahdi_part *p = &apt->at_parts[apt->at_nparts]; 654 *((u_int32_t *)&p->ap_flg) = id; 655 p->ap_st = part->ap_st + rsec; 656 p->ap_end = p->ap_st + part->ap_size - 1; 657 } 658 apt->at_nparts += 1; 659 } 660 apt->at_hdsize = root->ar_hdsize; 661 apt->at_bslst = root->ar_bslst; 662 apt->at_bslend = root->ar_bslst + root->ar_bslsize - 1; 663 rv = 0; 664 done: 665 brelse(bp); 666 return(rv); 667 } 668 #endif /* DISKLABEL_AHDI */ 669