1 /* $NetBSD: biosdisk.c,v 1.43 2013/10/31 20:31:04 christos Exp $ */ 2 3 /* 4 * Copyright (c) 1996, 1998 5 * Matthias Drochner. 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 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 * 27 */ 28 29 /* 30 * raw BIOS disk device for libsa. 31 * needs lowlevel parts from bios_disk.S and biosdisk_ll.c 32 * partly from netbsd:sys/arch/i386/boot/disk.c 33 * no bad144 handling! 34 * 35 * A lot of this must match sys/kern/subr_disk_mbr.c 36 */ 37 38 /* 39 * Ported to boot 386BSD by Julian Elischer (julian@tfs.com) Sept 1992 40 * 41 * Mach Operating System 42 * Copyright (c) 1992, 1991 Carnegie Mellon University 43 * All Rights Reserved. 44 * 45 * Permission to use, copy, modify and distribute this software and its 46 * documentation is hereby granted, provided that both the copyright 47 * notice and this permission notice appear in all copies of the 48 * software, derivative works or modified versions, and any portions 49 * thereof, and that both notices appear in supporting documentation. 50 * 51 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 52 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR 53 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 54 * 55 * Carnegie Mellon requests users of this software to return to 56 * 57 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 58 * School of Computer Science 59 * Carnegie Mellon University 60 * Pittsburgh PA 15213-3890 61 * 62 * any improvements or extensions that they make and grant Carnegie Mellon 63 * the rights to redistribute these changes. 64 */ 65 66 #if !defined(NO_DISKLABEL) || !defined(NO_GPT) 67 #define FSTYPENAMES 68 #endif 69 70 #include <lib/libkern/libkern.h> 71 #include <lib/libsa/stand.h> 72 73 #include <sys/types.h> 74 #include <sys/md5.h> 75 #include <sys/param.h> 76 #include <sys/disklabel.h> 77 #include <sys/disklabel_gpt.h> 78 #include <sys/uuid.h> 79 80 #include <fs/cd9660/iso.h> 81 82 #include <lib/libsa/saerrno.h> 83 #include <machine/cpu.h> 84 85 #include "libi386.h" 86 #include "biosdisk_ll.h" 87 #include "biosdisk.h" 88 #ifdef _STANDALONE 89 #include "bootinfo.h" 90 #endif 91 92 #define BUFSIZE 2048 /* must be large enough for a CD sector */ 93 94 #define BIOSDISKNPART 26 95 96 struct biosdisk { 97 struct biosdisk_ll ll; 98 daddr_t boff; 99 char buf[BUFSIZE]; 100 #if !defined(NO_DISKLABEL) || !defined(NO_GPT) 101 struct { 102 daddr_t offset; 103 daddr_t size; 104 int fstype; 105 } part[BIOSDISKNPART]; 106 #endif 107 }; 108 109 #ifndef NO_GPT 110 const struct uuid GET_nbsd_raid = GPT_ENT_TYPE_NETBSD_RAIDFRAME; 111 const struct uuid GET_nbsd_ffs = GPT_ENT_TYPE_NETBSD_FFS; 112 const struct uuid GET_nbsd_lfs = GPT_ENT_TYPE_NETBSD_LFS; 113 const struct uuid GET_nbsd_swap = GPT_ENT_TYPE_NETBSD_SWAP; 114 #endif /* NO_GPT */ 115 116 #ifdef _STANDALONE 117 static struct btinfo_bootdisk bi_disk; 118 static struct btinfo_bootwedge bi_wedge; 119 #endif 120 121 #define MBR_PARTS(buf) ((char *)(buf) + offsetof(struct mbr_sector, mbr_parts)) 122 123 #define RF_PROTECTED_SECTORS 64 /* XXX refer to <.../rf_optnames.h> */ 124 125 int 126 biosdisk_strategy(void *devdata, int flag, daddr_t dblk, size_t size, 127 void *buf, size_t *rsize) 128 { 129 struct biosdisk *d; 130 int blks, frag; 131 132 if (flag != F_READ) 133 return EROFS; 134 135 d = (struct biosdisk *) devdata; 136 137 if (d->ll.type == BIOSDISK_TYPE_CD) 138 dblk = dblk * DEV_BSIZE / ISO_DEFAULT_BLOCK_SIZE; 139 140 dblk += d->boff; 141 142 blks = size / d->ll.secsize; 143 if (blks && readsects(&d->ll, dblk, blks, buf, 0)) { 144 if (rsize) 145 *rsize = 0; 146 return EIO; 147 } 148 149 /* needed for CD */ 150 frag = size % d->ll.secsize; 151 if (frag) { 152 if (readsects(&d->ll, dblk + blks, 1, d->buf, 0)) { 153 if (rsize) 154 *rsize = blks * d->ll.secsize; 155 return EIO; 156 } 157 memcpy(buf + blks * d->ll.secsize, d->buf, frag); 158 } 159 160 if (rsize) 161 *rsize = size; 162 return 0; 163 } 164 165 static struct biosdisk * 166 alloc_biosdisk(int biosdev) 167 { 168 struct biosdisk *d; 169 170 d = alloc(sizeof(*d)); 171 if (d == NULL) 172 return NULL; 173 memset(d, 0, sizeof(*d)); 174 175 d->ll.dev = biosdev; 176 if (set_geometry(&d->ll, NULL)) { 177 #ifdef DISK_DEBUG 178 printf("no geometry information\n"); 179 #endif 180 dealloc(d, sizeof(*d)); 181 return NULL; 182 } 183 return d; 184 } 185 186 #if !defined(NO_DISKLABEL) || !defined(NO_GPT) 187 static void 188 md5(void *hash, const void *data, size_t len) 189 { 190 MD5_CTX ctx; 191 192 MD5Init(&ctx); 193 MD5Update(&ctx, data, len); 194 MD5Final(hash, &ctx); 195 196 return; 197 } 198 #endif 199 200 #ifndef NO_GPT 201 static bool 202 guid_is_nil(const struct uuid *u) 203 { 204 static const struct uuid nil = { .time_low = 0 }; 205 return (memcmp(u, &nil, sizeof(*u)) == 0 ? true : false); 206 } 207 208 static bool 209 guid_is_equal(const struct uuid *a, const struct uuid *b) 210 { 211 return (memcmp(a, b, sizeof(*a)) == 0 ? true : false); 212 } 213 214 static int 215 check_gpt(struct biosdisk *d, daddr_t sector) 216 { 217 struct gpt_hdr gpth; 218 const struct gpt_ent *ep; 219 const struct uuid *u; 220 daddr_t entblk; 221 size_t size; 222 uint32_t crc; 223 int sectors; 224 int entries; 225 int entry; 226 int i, j; 227 228 /* read in gpt_hdr sector */ 229 if (readsects(&d->ll, sector, 1, d->buf, 1)) { 230 #ifdef DISK_DEBUG 231 printf("Error reading GPT header at %"PRId64"\n", sector); 232 #endif 233 return EIO; 234 } 235 236 memcpy(&gpth, d->buf, sizeof(gpth)); 237 238 if (memcmp(GPT_HDR_SIG, gpth.hdr_sig, sizeof(gpth.hdr_sig))) 239 return -1; 240 241 crc = gpth.hdr_crc_self; 242 gpth.hdr_crc_self = 0; 243 gpth.hdr_crc_self = crc32(0, (const void *)&gpth, GPT_HDR_SIZE); 244 if (gpth.hdr_crc_self != crc) { 245 return -1; 246 } 247 248 if (gpth.hdr_lba_self != sector) 249 return -1; 250 251 #ifdef _STANDALONE 252 bi_wedge.matchblk = sector; 253 bi_wedge.matchnblks = 1; 254 255 md5(bi_wedge.matchhash, d->buf, d->ll.secsize); 256 #endif 257 258 sectors = sizeof(d->buf)/d->ll.secsize; /* sectors per buffer */ 259 entries = sizeof(d->buf)/gpth.hdr_entsz; /* entries per buffer */ 260 entblk = gpth.hdr_lba_table; 261 crc = crc32(0, NULL, 0); 262 263 j = 0; 264 ep = (const struct gpt_ent *)d->buf; 265 266 for (entry = 0; entry < gpth.hdr_entries; entry += entries) { 267 size = MIN(sizeof(d->buf), 268 (gpth.hdr_entries - entry) * gpth.hdr_entsz); 269 entries = size / gpth.hdr_entsz; 270 sectors = roundup(size, d->ll.secsize) / d->ll.secsize; 271 if (readsects(&d->ll, entblk, sectors, d->buf, 1)) 272 return -1; 273 entblk += sectors; 274 crc = crc32(crc, (const void *)d->buf, size); 275 276 for (i = 0; j < BIOSDISKNPART && i < entries; i++, j++) { 277 u = (const struct uuid *)ep[i].ent_type; 278 if (!guid_is_nil(u)) { 279 d->part[j].offset = ep[i].ent_lba_start; 280 d->part[j].size = ep[i].ent_lba_end - 281 ep[i].ent_lba_start + 1; 282 if (guid_is_equal(u, &GET_nbsd_ffs)) 283 d->part[j].fstype = FS_BSDFFS; 284 else if (guid_is_equal(u, &GET_nbsd_lfs)) 285 d->part[j].fstype = FS_BSDLFS; 286 else if (guid_is_equal(u, &GET_nbsd_raid)) 287 d->part[j].fstype = FS_RAID; 288 else if (guid_is_equal(u, &GET_nbsd_swap)) 289 d->part[j].fstype = FS_SWAP; 290 else 291 d->part[j].fstype = FS_OTHER; 292 } 293 } 294 295 } 296 297 if (crc != gpth.hdr_crc_table) { 298 #ifdef DISK_DEBUG 299 printf("GPT table CRC invalid\n"); 300 #endif 301 return -1; 302 } 303 304 return 0; 305 } 306 307 static int 308 read_gpt(struct biosdisk *d) 309 { 310 struct biosdisk_extinfo ed; 311 daddr_t gptsector[2]; 312 int i, error; 313 314 if (d->ll.type != BIOSDISK_TYPE_HD) 315 /* No GPT on floppy and CD */ 316 return -1; 317 318 gptsector[0] = GPT_HDR_BLKNO; 319 if (set_geometry(&d->ll, &ed) == 0 && d->ll.flags & BIOSDISK_INT13EXT) { 320 gptsector[1] = ed.totsec - 1; 321 /* Sanity check values returned from BIOS */ 322 if (ed.sbytes >= 512 && (ed.sbytes & (ed.sbytes - 1)) == 0) 323 d->ll.secsize = ed.sbytes; 324 } else { 325 #ifdef DISK_DEBUG 326 printf("Unable to determine extended disk geometry - " 327 "using CHS\n"); 328 #endif 329 /* at least try some other reasonable values then */ 330 gptsector[1] = d->ll.chs_sectors - 1; 331 } 332 333 /* 334 * Use any valid GPT available, do not require both GPTs to be valid 335 */ 336 for (i = 0; i < __arraycount(gptsector); i++) { 337 error = check_gpt(d, gptsector[i]); 338 if (error == 0) 339 break; 340 } 341 342 if (i >= __arraycount(gptsector)) { 343 memset(d->part, 0, sizeof(d->part)); 344 return -1; 345 } 346 347 #ifdef DISK_DEBUG 348 printf("using %s GPT\n", (i == 0) ? "primary" : "secondary"); 349 #endif 350 return 0; 351 } 352 #endif /* !NO_GPT */ 353 354 #ifndef NO_DISKLABEL 355 static void 356 ingest_label(struct biosdisk *d, struct disklabel *lp) 357 { 358 int part; 359 360 memset(d->part, 0, sizeof(d->part)); 361 362 for (part = 0; part < lp->d_npartitions; part++) { 363 if (lp->d_partitions[part].p_size == 0) 364 continue; 365 if (lp->d_partitions[part].p_fstype == FS_UNUSED) 366 continue; 367 d->part[part].fstype = lp->d_partitions[part].p_fstype; 368 d->part[part].offset = lp->d_partitions[part].p_offset; 369 d->part[part].size = lp->d_partitions[part].p_size; 370 } 371 } 372 373 static int 374 check_label(struct biosdisk *d, daddr_t sector) 375 { 376 struct disklabel *lp; 377 378 /* find partition in NetBSD disklabel */ 379 if (readsects(&d->ll, sector + LABELSECTOR, 1, d->buf, 0)) { 380 #ifdef DISK_DEBUG 381 printf("Error reading disklabel\n"); 382 #endif 383 return EIO; 384 } 385 lp = (struct disklabel *) (d->buf + LABELOFFSET); 386 if (lp->d_magic != DISKMAGIC || dkcksum(lp)) { 387 #ifdef DISK_DEBUG 388 printf("warning: no disklabel in sector %"PRId64"\n", sector); 389 #endif 390 return -1; 391 } 392 393 ingest_label(d, lp); 394 395 #ifdef _STANDALONE 396 bi_disk.labelsector = sector + LABELSECTOR; 397 bi_disk.label.type = lp->d_type; 398 memcpy(bi_disk.label.packname, lp->d_packname, 16); 399 bi_disk.label.checksum = lp->d_checksum; 400 401 bi_wedge.matchblk = sector + LABELSECTOR; 402 bi_wedge.matchnblks = 1; 403 404 md5(bi_wedge.matchhash, d->buf, d->ll.secsize); 405 #endif 406 407 return 0; 408 } 409 410 static int 411 read_minix_subp(struct biosdisk *d, struct disklabel* dflt_lbl, 412 int this_ext, daddr_t sector) 413 { 414 struct mbr_partition mbr[MBR_PART_COUNT]; 415 int i; 416 int typ; 417 struct partition *p; 418 419 if (readsects(&d->ll, sector, 1, d->buf, 0)) { 420 #ifdef DISK_DEBUG 421 printf("Error reading MFS sector %"PRId64"\n", sector); 422 #endif 423 return EIO; 424 } 425 if ((uint8_t)d->buf[510] != 0x55 || (uint8_t)d->buf[511] != 0xAA) { 426 return -1; 427 } 428 memcpy(&mbr, MBR_PARTS(d->buf), sizeof(mbr)); 429 for (i = 0; i < MBR_PART_COUNT; i++) { 430 typ = mbr[i].mbrp_type; 431 if (typ == 0) 432 continue; 433 sector = this_ext + mbr[i].mbrp_start; 434 if (dflt_lbl->d_npartitions >= MAXPARTITIONS) 435 continue; 436 p = &dflt_lbl->d_partitions[dflt_lbl->d_npartitions++]; 437 p->p_offset = sector; 438 p->p_size = mbr[i].mbrp_size; 439 p->p_fstype = xlat_mbr_fstype(typ); 440 } 441 return 0; 442 } 443 444 static int 445 read_label(struct biosdisk *d) 446 { 447 struct disklabel dflt_lbl; 448 struct mbr_partition mbr[MBR_PART_COUNT]; 449 struct partition *p; 450 uint32_t sector; 451 int i; 452 int error; 453 int typ; 454 uint32_t ext_base, this_ext, next_ext; 455 #ifdef COMPAT_386BSD_MBRPART 456 int sector_386bsd = -1; 457 #endif 458 459 memset(&dflt_lbl, 0, sizeof(dflt_lbl)); 460 dflt_lbl.d_npartitions = 8; 461 462 d->boff = 0; 463 464 if (d->ll.type != BIOSDISK_TYPE_HD) 465 /* No label on floppy and CD */ 466 return -1; 467 468 /* 469 * find NetBSD Partition in DOS partition table 470 * XXX check magic??? 471 */ 472 ext_base = 0; 473 next_ext = 0; 474 for (;;) { 475 this_ext = ext_base + next_ext; 476 next_ext = 0; 477 if (readsects(&d->ll, this_ext, 1, d->buf, 0)) { 478 #ifdef DISK_DEBUG 479 printf("error reading MBR sector %u\n", this_ext); 480 #endif 481 return EIO; 482 } 483 memcpy(&mbr, MBR_PARTS(d->buf), sizeof(mbr)); 484 /* Look for NetBSD partition ID */ 485 for (i = 0; i < MBR_PART_COUNT; i++) { 486 typ = mbr[i].mbrp_type; 487 if (typ == 0) 488 continue; 489 sector = this_ext + mbr[i].mbrp_start; 490 #ifdef DISK_DEBUG 491 printf("ptn type %d in sector %u\n", typ, sector); 492 #endif 493 if (typ == MBR_PTYPE_MINIX_14B) { 494 if (!read_minix_subp(d, &dflt_lbl, 495 this_ext, sector)) { 496 /* Don't add "container" partition */ 497 continue; 498 } 499 } 500 if (typ == MBR_PTYPE_NETBSD) { 501 error = check_label(d, sector); 502 if (error >= 0) 503 return error; 504 } 505 if (MBR_IS_EXTENDED(typ)) { 506 next_ext = mbr[i].mbrp_start; 507 continue; 508 } 509 #ifdef COMPAT_386BSD_MBRPART 510 if (this_ext == 0 && typ == MBR_PTYPE_386BSD) 511 sector_386bsd = sector; 512 #endif 513 if (this_ext != 0) { 514 if (dflt_lbl.d_npartitions >= MAXPARTITIONS) 515 continue; 516 p = &dflt_lbl.d_partitions[dflt_lbl.d_npartitions++]; 517 } else 518 p = &dflt_lbl.d_partitions[i]; 519 p->p_offset = sector; 520 p->p_size = mbr[i].mbrp_size; 521 p->p_fstype = xlat_mbr_fstype(typ); 522 } 523 if (next_ext == 0) 524 break; 525 if (ext_base == 0) { 526 ext_base = next_ext; 527 next_ext = 0; 528 } 529 } 530 531 sector = 0; 532 #ifdef COMPAT_386BSD_MBRPART 533 if (sector_386bsd != -1) { 534 printf("old BSD partition ID!\n"); 535 sector = sector_386bsd; 536 } 537 #endif 538 539 /* 540 * One of two things: 541 * 1. no MBR 542 * 2. no NetBSD partition in MBR 543 * 544 * We simply default to "start of disk" in this case and 545 * press on. 546 */ 547 error = check_label(d, sector); 548 if (error >= 0) 549 return error; 550 551 /* 552 * Nothing at start of disk, return info from mbr partitions. 553 */ 554 /* XXX fill it to make checksum match kernel one */ 555 dflt_lbl.d_checksum = dkcksum(&dflt_lbl); 556 ingest_label(d, &dflt_lbl); 557 return 0; 558 } 559 #endif /* NO_DISKLABEL */ 560 561 #if !defined(NO_DISKLABEL) || !defined(NO_GPT) 562 static int 563 read_partitions(struct biosdisk *d) 564 { 565 int error; 566 567 error = -1; 568 569 #ifndef NO_GPT 570 error = read_gpt(d); 571 if (error == 0) 572 return 0; 573 574 #endif 575 #ifndef NO_DISKLABEL 576 error = read_label(d); 577 578 #endif 579 return error; 580 } 581 #endif 582 583 void 584 biosdisk_probe(void) 585 { 586 struct biosdisk d; 587 struct biosdisk_extinfo ed; 588 uint64_t size; 589 int first; 590 int i; 591 #if !defined(NO_DISKLABEL) || !defined(NO_GPT) 592 int part; 593 #endif 594 595 for (i = 0; i < MAX_BIOSDISKS + 2; i++) { 596 first = 1; 597 memset(&d, 0, sizeof(d)); 598 memset(&ed, 0, sizeof(ed)); 599 if (i >= MAX_BIOSDISKS) 600 d.ll.dev = 0x00 + i - MAX_BIOSDISKS; /* fd */ 601 else 602 d.ll.dev = 0x80 + i; /* hd/cd */ 603 if (set_geometry(&d.ll, &ed)) 604 continue; 605 printf("disk "); 606 switch (d.ll.type) { 607 case BIOSDISK_TYPE_CD: 608 printf("cd0\n cd0a\n"); 609 break; 610 case BIOSDISK_TYPE_FD: 611 printf("fd%d\n", d.ll.dev & 0x7f); 612 printf(" fd%da\n", d.ll.dev & 0x7f); 613 break; 614 case BIOSDISK_TYPE_HD: 615 printf("hd%d", d.ll.dev & 0x7f); 616 if (d.ll.flags & BIOSDISK_INT13EXT) { 617 printf(" size "); 618 size = ed.totsec * ed.sbytes; 619 if (size >= (10ULL * 1024 * 1024 * 1024)) 620 printf("%"PRIu64" GB", 621 size / (1024 * 1024 * 1024)); 622 else 623 printf("%"PRIu64" MB", 624 size / (1024 * 1024)); 625 } 626 printf("\n"); 627 break; 628 } 629 #if !defined(NO_DISKLABEL) || !defined(NO_GPT) 630 if (d.ll.type != BIOSDISK_TYPE_HD) 631 continue; 632 633 if (read_partitions(&d) != 0) 634 continue; 635 636 for (part = 0; part < BIOSDISKNPART; part++) { 637 if (d.part[part].size == 0) 638 continue; 639 if (d.part[part].fstype == FS_UNUSED) 640 continue; 641 if (first) { 642 printf(" "); 643 first = 0; 644 } 645 printf(" hd%d%c(", d.ll.dev & 0x7f, part + 'a'); 646 if (d.part[part].fstype < FSMAXTYPES) 647 printf("%s", 648 fstypenames[d.part[part].fstype]); 649 else 650 printf("%d", d.part[part].fstype); 651 printf(")"); 652 } 653 #endif 654 if (first == 0) 655 printf("\n"); 656 } 657 } 658 659 /* Determine likely partition for possible sector number of dos 660 * partition. 661 */ 662 663 int 664 biosdisk_findpartition(int biosdev, daddr_t sector) 665 { 666 #if defined(NO_DISKLABEL) && defined(NO_GPT) 667 return 0; 668 #else 669 struct biosdisk *d; 670 int partition = 0; 671 #ifdef DISK_DEBUG 672 printf("looking for partition device %x, sector %"PRId64"\n", biosdev, sector); 673 #endif 674 675 /* Look for netbsd partition that is the dos boot one */ 676 d = alloc_biosdisk(biosdev); 677 if (d == NULL) 678 return 0; 679 680 if (read_partitions(d) == 0) { 681 for (partition = (BIOSDISKNPART-1); --partition;) { 682 if (d->part[partition].fstype == FS_UNUSED) 683 continue; 684 if (d->part[partition].offset == sector) 685 break; 686 } 687 } 688 689 dealloc(d, sizeof(*d)); 690 return partition; 691 #endif /* NO_DISKLABEL && NO_GPT */ 692 } 693 694 #ifdef _STANDALONE 695 static void 696 add_biosdisk_bootinfo(void) 697 { 698 static bool done; 699 700 if (bootinfo == NULL) { 701 done = false; 702 return; 703 } 704 705 if (done) 706 return; 707 708 BI_ADD(&bi_disk, BTINFO_BOOTDISK, sizeof(bi_disk)); 709 BI_ADD(&bi_wedge, BTINFO_BOOTWEDGE, sizeof(bi_wedge)); 710 711 done = true; 712 713 return; 714 } 715 716 #endif 717 718 int 719 biosdisk_open(struct open_file *f, ...) 720 /* struct open_file *f, int biosdev, int partition */ 721 { 722 va_list ap; 723 struct biosdisk *d; 724 int biosdev; 725 int partition; 726 int error = 0; 727 728 va_start(ap, f); 729 biosdev = va_arg(ap, int); 730 d = alloc_biosdisk(biosdev); 731 if (d == NULL) { 732 error = ENXIO; 733 goto out; 734 } 735 736 partition = va_arg(ap, int); 737 #ifdef _STANDALONE 738 bi_disk.biosdev = d->ll.dev; 739 bi_disk.partition = partition; 740 bi_disk.labelsector = -1; 741 742 bi_wedge.biosdev = d->ll.dev; 743 bi_wedge.matchblk = -1; 744 #endif 745 746 #if !defined(NO_DISKLABEL) || !defined(NO_GPT) 747 error = read_partitions(d); 748 if (error == -1) { 749 error = 0; 750 goto nolabel; 751 } 752 if (error) 753 goto out; 754 755 if (partition >= BIOSDISKNPART || 756 d->part[partition].fstype == FS_UNUSED) { 757 #ifdef DISK_DEBUG 758 printf("illegal partition\n"); 759 #endif 760 error = EPART; 761 goto out; 762 } 763 764 d->boff = d->part[partition].offset; 765 766 if (d->part[partition].fstype == FS_RAID) 767 d->boff += RF_PROTECTED_SECTORS; 768 769 #ifdef _STANDALONE 770 bi_wedge.startblk = d->part[partition].offset; 771 bi_wedge.nblks = d->part[partition].size; 772 #endif 773 774 nolabel: 775 #endif 776 #ifdef DISK_DEBUG 777 printf("partition @%"PRId64"\n", d->boff); 778 #endif 779 780 #ifdef _STANDALONE 781 add_biosdisk_bootinfo(); 782 #endif 783 784 f->f_devdata = d; 785 out: 786 va_end(ap); 787 if (error) 788 dealloc(d, sizeof(*d)); 789 return error; 790 } 791 792 #ifndef LIBSA_NO_FS_CLOSE 793 int 794 biosdisk_close(struct open_file *f) 795 { 796 struct biosdisk *d = f->f_devdata; 797 798 /* let the floppy drive go off */ 799 if (d->ll.type == BIOSDISK_TYPE_FD) 800 wait_sec(3); /* 2s is enough on all PCs I found */ 801 802 dealloc(d, sizeof(*d)); 803 f->f_devdata = NULL; 804 return 0; 805 } 806 #endif 807 808 int 809 biosdisk_ioctl(struct open_file *f, u_long cmd, void *arg) 810 { 811 return EIO; 812 } 813