biosdisk.c revision 1.46
1 /* $NetBSD: biosdisk.c,v 1.46 2017/01/24 11:09:14 nonaka 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 (at) 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 (at) 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 #ifdef EFIBOOT 106 const struct gpt_part { 107 const struct uuid *guid; 108 const char *name; 109 } *guid; 110 uint64_t attr; 111 #endif 112 } part[BIOSDISKNPART]; 113 #endif 114 }; 115 116 #ifndef NO_GPT 117 const struct uuid GET_nbsd_raid = GPT_ENT_TYPE_NETBSD_RAIDFRAME; 118 const struct uuid GET_nbsd_ffs = GPT_ENT_TYPE_NETBSD_FFS; 119 const struct uuid GET_nbsd_lfs = GPT_ENT_TYPE_NETBSD_LFS; 120 const struct uuid GET_nbsd_swap = GPT_ENT_TYPE_NETBSD_SWAP; 121 const struct uuid GET_nbsd_ccd = GPT_ENT_TYPE_NETBSD_CCD; 122 const struct uuid GET_nbsd_cgd = GPT_ENT_TYPE_NETBSD_CGD; 123 #ifdef EFIBOOT 124 const struct uuid GET_efi = GPT_ENT_TYPE_EFI; 125 const struct uuid GET_mbr = GPT_ENT_TYPE_MBR; 126 const struct uuid GET_fbsd = GPT_ENT_TYPE_FREEBSD; 127 const struct uuid GET_fbsd_swap = GPT_ENT_TYPE_FREEBSD_SWAP; 128 const struct uuid GET_fbsd_ufs = GPT_ENT_TYPE_FREEBSD_UFS; 129 const struct uuid GET_fbsd_vinum = GPT_ENT_TYPE_FREEBSD_VINUM; 130 const struct uuid GET_fbsd_zfs = GPT_ENT_TYPE_FREEBSD_ZFS; 131 const struct uuid GET_ms_rsvd = GPT_ENT_TYPE_MS_RESERVED; 132 const struct uuid GET_ms_basic_data = GPT_ENT_TYPE_MS_BASIC_DATA; 133 const struct uuid GET_ms_ldm_metadata = GPT_ENT_TYPE_MS_LDM_METADATA; 134 const struct uuid GET_ms_ldm_data = GPT_ENT_TYPE_MS_LDM_DATA; 135 const struct uuid GET_linux_data = GPT_ENT_TYPE_LINUX_DATA; 136 const struct uuid GET_linux_raid = GPT_ENT_TYPE_LINUX_RAID; 137 const struct uuid GET_linux_swap = GPT_ENT_TYPE_LINUX_SWAP; 138 const struct uuid GET_linux_lvm = GPT_ENT_TYPE_LINUX_LVM; 139 const struct uuid GET_apple_hfs = GPT_ENT_TYPE_APPLE_HFS; 140 const struct uuid GET_apple_ufs = GPT_ENT_TYPE_APPLE_UFS; 141 const struct uuid GET_bios = GPT_ENT_TYPE_BIOS; 142 143 const struct gpt_part gpt_parts[] = { 144 { &GET_nbsd_raid, "NetBSD RAID" }, 145 { &GET_nbsd_ffs, "NetBSD FFS" }, 146 { &GET_nbsd_lfs, "NetBSD LFS" }, 147 { &GET_nbsd_swap, "NetBSD Swap" }, 148 { &GET_nbsd_ccd, "NetBSD ccd" }, 149 { &GET_nbsd_cgd, "NetBSD cgd" }, 150 { &GET_efi, "EFI System" }, 151 { &GET_mbr, "MBR" }, 152 { &GET_fbsd, "FreeBSD" }, 153 { &GET_fbsd_swap, "FreeBSD Swap" }, 154 { &GET_fbsd_ufs, "FreeBSD UFS" }, 155 { &GET_fbsd_vinum, "FreeBSD Vinum" }, 156 { &GET_fbsd_zfs, "FreeBSD ZFS" }, 157 { &GET_ms_rsvd, "Microsoft Reserved" }, 158 { &GET_ms_basic_data, "Microsoft Basic data" }, 159 { &GET_ms_ldm_metadata, "Microsoft LDM metadata" }, 160 { &GET_ms_ldm_data, "Microsoft LDM data" }, 161 { &GET_linux_data, "Linux data" }, 162 { &GET_linux_raid, "Linux RAID" }, 163 { &GET_linux_swap, "Linux Swap" }, 164 { &GET_linux_lvm, "Linux LVM" }, 165 { &GET_apple_hfs, "Apple HFS" }, 166 { &GET_apple_ufs, "Apple UFS" }, 167 { &GET_bios, "BIOS Boot (GRUB)" }, 168 }; 169 #endif 170 #endif /* NO_GPT */ 171 172 #ifdef _STANDALONE 173 static struct btinfo_bootdisk bi_disk; 174 static struct btinfo_bootwedge bi_wedge; 175 #endif 176 177 #define MBR_PARTS(buf) ((char *)(buf) + offsetof(struct mbr_sector, mbr_parts)) 178 179 #define RF_PROTECTED_SECTORS 64 /* XXX refer to <.../rf_optnames.h> */ 180 181 int 182 biosdisk_strategy(void *devdata, int flag, daddr_t dblk, size_t size, 183 void *buf, size_t *rsize) 184 { 185 struct biosdisk *d; 186 int blks, frag; 187 188 if (flag != F_READ) 189 return EROFS; 190 191 d = (struct biosdisk *) devdata; 192 193 if (d->ll.type == BIOSDISK_TYPE_CD) 194 dblk = dblk * DEV_BSIZE / ISO_DEFAULT_BLOCK_SIZE; 195 196 dblk += d->boff; 197 198 blks = size / d->ll.secsize; 199 if (blks && readsects(&d->ll, dblk, blks, buf, 0)) { 200 if (rsize) 201 *rsize = 0; 202 return EIO; 203 } 204 205 /* needed for CD */ 206 frag = size % d->ll.secsize; 207 if (frag) { 208 if (readsects(&d->ll, dblk + blks, 1, d->buf, 0)) { 209 if (rsize) 210 *rsize = blks * d->ll.secsize; 211 return EIO; 212 } 213 memcpy(buf + blks * d->ll.secsize, d->buf, frag); 214 } 215 216 if (rsize) 217 *rsize = size; 218 return 0; 219 } 220 221 static struct biosdisk * 222 alloc_biosdisk(int biosdev) 223 { 224 struct biosdisk *d; 225 226 d = alloc(sizeof(*d)); 227 if (d == NULL) 228 return NULL; 229 memset(d, 0, sizeof(*d)); 230 231 d->ll.dev = biosdev; 232 if (set_geometry(&d->ll, NULL)) { 233 #ifdef DISK_DEBUG 234 printf("no geometry information\n"); 235 #endif 236 dealloc(d, sizeof(*d)); 237 return NULL; 238 } 239 return d; 240 } 241 242 #if !defined(NO_DISKLABEL) || !defined(NO_GPT) 243 static void 244 md5(void *hash, const void *data, size_t len) 245 { 246 MD5_CTX ctx; 247 248 MD5Init(&ctx); 249 MD5Update(&ctx, data, len); 250 MD5Final(hash, &ctx); 251 252 return; 253 } 254 #endif 255 256 #ifndef NO_GPT 257 static bool 258 guid_is_nil(const struct uuid *u) 259 { 260 static const struct uuid nil = { .time_low = 0 }; 261 return (memcmp(u, &nil, sizeof(*u)) == 0 ? true : false); 262 } 263 264 static bool 265 guid_is_equal(const struct uuid *a, const struct uuid *b) 266 { 267 return (memcmp(a, b, sizeof(*a)) == 0 ? true : false); 268 } 269 270 static int 271 check_gpt(struct biosdisk *d, daddr_t sector) 272 { 273 struct gpt_hdr gpth; 274 const struct gpt_ent *ep; 275 const struct uuid *u; 276 daddr_t entblk; 277 size_t size; 278 uint32_t crc; 279 int sectors; 280 int entries; 281 int entry; 282 int i, j; 283 284 /* read in gpt_hdr sector */ 285 if (readsects(&d->ll, sector, 1, d->buf, 1)) { 286 #ifdef DISK_DEBUG 287 printf("Error reading GPT header at %"PRId64"\n", sector); 288 #endif 289 return EIO; 290 } 291 292 memcpy(&gpth, d->buf, sizeof(gpth)); 293 294 if (memcmp(GPT_HDR_SIG, gpth.hdr_sig, sizeof(gpth.hdr_sig))) 295 return -1; 296 297 crc = gpth.hdr_crc_self; 298 gpth.hdr_crc_self = 0; 299 gpth.hdr_crc_self = crc32(0, (const void *)&gpth, GPT_HDR_SIZE); 300 if (gpth.hdr_crc_self != crc) { 301 return -1; 302 } 303 304 if (gpth.hdr_lba_self != sector) 305 return -1; 306 307 #ifdef _STANDALONE 308 bi_wedge.matchblk = sector; 309 bi_wedge.matchnblks = 1; 310 311 md5(bi_wedge.matchhash, d->buf, d->ll.secsize); 312 #endif 313 314 sectors = sizeof(d->buf)/d->ll.secsize; /* sectors per buffer */ 315 entries = sizeof(d->buf)/gpth.hdr_entsz; /* entries per buffer */ 316 entblk = gpth.hdr_lba_table; 317 crc = crc32(0, NULL, 0); 318 319 j = 0; 320 ep = (const struct gpt_ent *)d->buf; 321 322 for (entry = 0; entry < gpth.hdr_entries; entry += entries) { 323 size = MIN(sizeof(d->buf), 324 (gpth.hdr_entries - entry) * gpth.hdr_entsz); 325 entries = size / gpth.hdr_entsz; 326 sectors = roundup(size, d->ll.secsize) / d->ll.secsize; 327 if (readsects(&d->ll, entblk, sectors, d->buf, 1)) 328 return -1; 329 entblk += sectors; 330 crc = crc32(crc, (const void *)d->buf, size); 331 332 for (i = 0; j < BIOSDISKNPART && i < entries; i++) { 333 u = (const struct uuid *)ep[i].ent_type; 334 if (!guid_is_nil(u)) { 335 d->part[j].offset = ep[i].ent_lba_start; 336 d->part[j].size = ep[i].ent_lba_end - 337 ep[i].ent_lba_start + 1; 338 if (guid_is_equal(u, &GET_nbsd_ffs)) 339 d->part[j].fstype = FS_BSDFFS; 340 else if (guid_is_equal(u, &GET_nbsd_lfs)) 341 d->part[j].fstype = FS_BSDLFS; 342 else if (guid_is_equal(u, &GET_nbsd_raid)) 343 d->part[j].fstype = FS_RAID; 344 else if (guid_is_equal(u, &GET_nbsd_swap)) 345 d->part[j].fstype = FS_SWAP; 346 else if (guid_is_equal(u, &GET_nbsd_ccd)) 347 d->part[j].fstype = FS_CCD; 348 else if (guid_is_equal(u, &GET_nbsd_cgd)) 349 d->part[j].fstype = FS_CGD; 350 else 351 d->part[j].fstype = FS_OTHER; 352 #ifdef EFIBOOT 353 for (int k = 0; 354 k < __arraycount(gpt_parts); 355 k++) { 356 if (guid_is_equal(u, gpt_parts[k].guid)) 357 d->part[j].guid = &gpt_parts[k]; 358 } 359 d->part[j].attr = ep[i].ent_attr; 360 #endif 361 j++; 362 } 363 } 364 365 } 366 367 if (crc != gpth.hdr_crc_table) { 368 #ifdef DISK_DEBUG 369 printf("GPT table CRC invalid\n"); 370 #endif 371 return -1; 372 } 373 374 return 0; 375 } 376 377 static int 378 read_gpt(struct biosdisk *d) 379 { 380 struct biosdisk_extinfo ed; 381 daddr_t gptsector[2]; 382 int i, error; 383 384 if (d->ll.type != BIOSDISK_TYPE_HD) 385 /* No GPT on floppy and CD */ 386 return -1; 387 388 gptsector[0] = GPT_HDR_BLKNO; 389 if (set_geometry(&d->ll, &ed) == 0 && d->ll.flags & BIOSDISK_INT13EXT) { 390 gptsector[1] = ed.totsec - 1; 391 /* Sanity check values returned from BIOS */ 392 if (ed.sbytes >= 512 && (ed.sbytes & (ed.sbytes - 1)) == 0) 393 d->ll.secsize = ed.sbytes; 394 } else { 395 #ifdef DISK_DEBUG 396 printf("Unable to determine extended disk geometry - " 397 "using CHS\n"); 398 #endif 399 /* at least try some other reasonable values then */ 400 gptsector[1] = d->ll.chs_sectors - 1; 401 } 402 403 for (i = 0; i < __arraycount(gptsector); i++) { 404 error = check_gpt(d, gptsector[i]); 405 if (error == 0) 406 break; 407 } 408 409 if (i >= __arraycount(gptsector)) { 410 memset(d->part, 0, sizeof(d->part)); 411 return -1; 412 } 413 414 #ifndef USE_SECONDARY_GPT 415 if (i > 0) { 416 #ifdef DISK_DEBUG 417 printf("ignoring valid secondary GPT\n"); 418 #endif 419 return -1; 420 } 421 #endif 422 423 #ifdef DISK_DEBUG 424 printf("using %s GPT\n", (i == 0) ? "primary" : "secondary"); 425 #endif 426 return 0; 427 } 428 #endif /* !NO_GPT */ 429 430 #ifndef NO_DISKLABEL 431 static void 432 ingest_label(struct biosdisk *d, struct disklabel *lp) 433 { 434 int part; 435 436 memset(d->part, 0, sizeof(d->part)); 437 438 for (part = 0; part < lp->d_npartitions; part++) { 439 if (lp->d_partitions[part].p_size == 0) 440 continue; 441 if (lp->d_partitions[part].p_fstype == FS_UNUSED) 442 continue; 443 d->part[part].fstype = lp->d_partitions[part].p_fstype; 444 d->part[part].offset = lp->d_partitions[part].p_offset; 445 d->part[part].size = lp->d_partitions[part].p_size; 446 } 447 } 448 449 static int 450 check_label(struct biosdisk *d, daddr_t sector) 451 { 452 struct disklabel *lp; 453 454 /* find partition in NetBSD disklabel */ 455 if (readsects(&d->ll, sector + LABELSECTOR, 1, d->buf, 0)) { 456 #ifdef DISK_DEBUG 457 printf("Error reading disklabel\n"); 458 #endif 459 return EIO; 460 } 461 lp = (struct disklabel *) (d->buf + LABELOFFSET); 462 if (lp->d_magic != DISKMAGIC || dkcksum(lp)) { 463 #ifdef DISK_DEBUG 464 printf("warning: no disklabel in sector %"PRId64"\n", sector); 465 #endif 466 return -1; 467 } 468 469 ingest_label(d, lp); 470 471 #ifdef _STANDALONE 472 bi_disk.labelsector = sector + LABELSECTOR; 473 bi_disk.label.type = lp->d_type; 474 memcpy(bi_disk.label.packname, lp->d_packname, 16); 475 bi_disk.label.checksum = lp->d_checksum; 476 477 bi_wedge.matchblk = sector + LABELSECTOR; 478 bi_wedge.matchnblks = 1; 479 480 md5(bi_wedge.matchhash, d->buf, d->ll.secsize); 481 #endif 482 483 return 0; 484 } 485 486 static int 487 read_minix_subp(struct biosdisk *d, struct disklabel* dflt_lbl, 488 int this_ext, daddr_t sector) 489 { 490 struct mbr_partition mbr[MBR_PART_COUNT]; 491 int i; 492 int typ; 493 struct partition *p; 494 495 if (readsects(&d->ll, sector, 1, d->buf, 0)) { 496 #ifdef DISK_DEBUG 497 printf("Error reading MFS sector %"PRId64"\n", sector); 498 #endif 499 return EIO; 500 } 501 if ((uint8_t)d->buf[510] != 0x55 || (uint8_t)d->buf[511] != 0xAA) { 502 return -1; 503 } 504 memcpy(&mbr, MBR_PARTS(d->buf), sizeof(mbr)); 505 for (i = 0; i < MBR_PART_COUNT; i++) { 506 typ = mbr[i].mbrp_type; 507 if (typ == 0) 508 continue; 509 sector = this_ext + mbr[i].mbrp_start; 510 if (dflt_lbl->d_npartitions >= MAXPARTITIONS) 511 continue; 512 p = &dflt_lbl->d_partitions[dflt_lbl->d_npartitions++]; 513 p->p_offset = sector; 514 p->p_size = mbr[i].mbrp_size; 515 p->p_fstype = xlat_mbr_fstype(typ); 516 } 517 return 0; 518 } 519 520 static int 521 read_label(struct biosdisk *d) 522 { 523 struct disklabel dflt_lbl; 524 struct mbr_partition mbr[MBR_PART_COUNT]; 525 struct partition *p; 526 uint32_t sector; 527 int i; 528 int error; 529 int typ; 530 uint32_t ext_base, this_ext, next_ext; 531 #ifdef COMPAT_386BSD_MBRPART 532 int sector_386bsd = -1; 533 #endif 534 535 memset(&dflt_lbl, 0, sizeof(dflt_lbl)); 536 dflt_lbl.d_npartitions = 8; 537 538 d->boff = 0; 539 540 if (d->ll.type != BIOSDISK_TYPE_HD) 541 /* No label on floppy and CD */ 542 return -1; 543 544 /* 545 * find NetBSD Partition in DOS partition table 546 * XXX check magic??? 547 */ 548 ext_base = 0; 549 next_ext = 0; 550 for (;;) { 551 this_ext = ext_base + next_ext; 552 next_ext = 0; 553 if (readsects(&d->ll, this_ext, 1, d->buf, 0)) { 554 #ifdef DISK_DEBUG 555 printf("error reading MBR sector %u\n", this_ext); 556 #endif 557 return EIO; 558 } 559 memcpy(&mbr, MBR_PARTS(d->buf), sizeof(mbr)); 560 /* Look for NetBSD partition ID */ 561 for (i = 0; i < MBR_PART_COUNT; i++) { 562 typ = mbr[i].mbrp_type; 563 if (typ == 0) 564 continue; 565 sector = this_ext + mbr[i].mbrp_start; 566 #ifdef DISK_DEBUG 567 printf("ptn type %d in sector %u\n", typ, sector); 568 #endif 569 if (typ == MBR_PTYPE_MINIX_14B) { 570 if (!read_minix_subp(d, &dflt_lbl, 571 this_ext, sector)) { 572 /* Don't add "container" partition */ 573 continue; 574 } 575 } 576 if (typ == MBR_PTYPE_NETBSD) { 577 error = check_label(d, sector); 578 if (error >= 0) 579 return error; 580 } 581 if (MBR_IS_EXTENDED(typ)) { 582 next_ext = mbr[i].mbrp_start; 583 continue; 584 } 585 #ifdef COMPAT_386BSD_MBRPART 586 if (this_ext == 0 && typ == MBR_PTYPE_386BSD) 587 sector_386bsd = sector; 588 #endif 589 if (this_ext != 0) { 590 if (dflt_lbl.d_npartitions >= MAXPARTITIONS) 591 continue; 592 p = &dflt_lbl.d_partitions[dflt_lbl.d_npartitions++]; 593 } else 594 p = &dflt_lbl.d_partitions[i]; 595 p->p_offset = sector; 596 p->p_size = mbr[i].mbrp_size; 597 p->p_fstype = xlat_mbr_fstype(typ); 598 } 599 if (next_ext == 0) 600 break; 601 if (ext_base == 0) { 602 ext_base = next_ext; 603 next_ext = 0; 604 } 605 } 606 607 sector = 0; 608 #ifdef COMPAT_386BSD_MBRPART 609 if (sector_386bsd != -1) { 610 printf("old BSD partition ID!\n"); 611 sector = sector_386bsd; 612 } 613 #endif 614 615 /* 616 * One of two things: 617 * 1. no MBR 618 * 2. no NetBSD partition in MBR 619 * 620 * We simply default to "start of disk" in this case and 621 * press on. 622 */ 623 error = check_label(d, sector); 624 if (error >= 0) 625 return error; 626 627 /* 628 * Nothing at start of disk, return info from mbr partitions. 629 */ 630 /* XXX fill it to make checksum match kernel one */ 631 dflt_lbl.d_checksum = dkcksum(&dflt_lbl); 632 ingest_label(d, &dflt_lbl); 633 return 0; 634 } 635 #endif /* NO_DISKLABEL */ 636 637 #if !defined(NO_DISKLABEL) || !defined(NO_GPT) 638 static int 639 read_partitions(struct biosdisk *d) 640 { 641 int error; 642 643 error = -1; 644 645 #ifndef NO_GPT 646 error = read_gpt(d); 647 if (error == 0) 648 return 0; 649 650 #endif 651 #ifndef NO_DISKLABEL 652 error = read_label(d); 653 654 #endif 655 return error; 656 } 657 #endif 658 659 void 660 biosdisk_probe(void) 661 { 662 struct biosdisk d; 663 struct biosdisk_extinfo ed; 664 uint64_t size; 665 int first; 666 int i; 667 #if !defined(NO_DISKLABEL) || !defined(NO_GPT) 668 int part; 669 #endif 670 671 for (i = 0; i < MAX_BIOSDISKS + 2; i++) { 672 first = 1; 673 memset(&d, 0, sizeof(d)); 674 memset(&ed, 0, sizeof(ed)); 675 if (i >= MAX_BIOSDISKS) 676 d.ll.dev = 0x00 + i - MAX_BIOSDISKS; /* fd */ 677 else 678 d.ll.dev = 0x80 + i; /* hd/cd */ 679 if (set_geometry(&d.ll, &ed)) 680 continue; 681 printf("disk "); 682 switch (d.ll.type) { 683 case BIOSDISK_TYPE_CD: 684 printf("cd0\n cd0a\n"); 685 break; 686 case BIOSDISK_TYPE_FD: 687 printf("fd%d\n", d.ll.dev & 0x7f); 688 printf(" fd%da\n", d.ll.dev & 0x7f); 689 break; 690 case BIOSDISK_TYPE_HD: 691 printf("hd%d", d.ll.dev & 0x7f); 692 if (d.ll.flags & BIOSDISK_INT13EXT) { 693 printf(" size "); 694 size = ed.totsec * ed.sbytes; 695 if (size >= (10ULL * 1024 * 1024 * 1024)) 696 printf("%"PRIu64" GB", 697 size / (1024 * 1024 * 1024)); 698 else 699 printf("%"PRIu64" MB", 700 size / (1024 * 1024)); 701 } 702 printf("\n"); 703 break; 704 } 705 #if !defined(NO_DISKLABEL) || !defined(NO_GPT) 706 if (d.ll.type != BIOSDISK_TYPE_HD) 707 continue; 708 709 if (read_partitions(&d) != 0) 710 continue; 711 712 for (part = 0; part < BIOSDISKNPART; part++) { 713 if (d.part[part].size == 0) 714 continue; 715 if (d.part[part].fstype == FS_UNUSED) 716 continue; 717 if (first) { 718 printf(" "); 719 first = 0; 720 } 721 printf(" hd%d%c(", d.ll.dev & 0x7f, part + 'a'); 722 #ifdef EFIBOOT 723 if (d.part[part].guid != NULL) 724 printf("%s", d.part[part].guid->name); 725 else 726 #endif 727 if (d.part[part].fstype < FSMAXTYPES) 728 printf("%s", 729 fstypenames[d.part[part].fstype]); 730 else 731 printf("%d", d.part[part].fstype); 732 printf(")"); 733 } 734 #endif 735 if (first == 0) 736 printf("\n"); 737 } 738 } 739 740 /* Determine likely partition for possible sector number of dos 741 * partition. 742 */ 743 744 int 745 biosdisk_findpartition(int biosdev, daddr_t sector) 746 { 747 #if defined(NO_DISKLABEL) && defined(NO_GPT) 748 return 0; 749 #else 750 struct biosdisk *d; 751 int partition = 0; 752 #ifdef EFIBOOT 753 int candidate = 0; 754 #endif 755 756 #ifdef DISK_DEBUG 757 printf("looking for partition device %x, sector %"PRId64"\n", biosdev, sector); 758 #endif 759 760 /* Look for netbsd partition that is the dos boot one */ 761 d = alloc_biosdisk(biosdev); 762 if (d == NULL) 763 return 0; 764 765 if (read_partitions(d) == 0) { 766 for (partition = (BIOSDISKNPART-1); --partition;) { 767 if (d->part[partition].fstype == FS_UNUSED) 768 continue; 769 #ifdef EFIBOOT 770 if (d->part[partition].attr & GPT_ENT_ATTR_BOOTME) { 771 switch (d->part[partition].fstype) { 772 case FS_BSDFFS: 773 case FS_BSDLFS: 774 case FS_RAID: 775 case FS_CCD: 776 case FS_CGD: 777 break; 778 779 default: 780 candidate = partition; 781 continue; 782 } 783 break; 784 } 785 #else 786 if (d->part[partition].offset == sector) 787 break; 788 #endif 789 } 790 #ifdef EFIBOOT 791 if (partition == 0 && candidate != 0) 792 partition = candidate; 793 #endif 794 } 795 796 dealloc(d, sizeof(*d)); 797 return partition; 798 #endif /* NO_DISKLABEL && NO_GPT */ 799 } 800 801 #ifdef _STANDALONE 802 static void 803 add_biosdisk_bootinfo(void) 804 { 805 if (bootinfo == NULL) { 806 return; 807 } 808 BI_ADD(&bi_disk, BTINFO_BOOTDISK, sizeof(bi_disk)); 809 BI_ADD(&bi_wedge, BTINFO_BOOTWEDGE, sizeof(bi_wedge)); 810 return; 811 } 812 #endif 813 814 int 815 biosdisk_open(struct open_file *f, ...) 816 /* struct open_file *f, int biosdev, int partition */ 817 { 818 va_list ap; 819 struct biosdisk *d; 820 int biosdev; 821 int partition; 822 int error = 0; 823 824 va_start(ap, f); 825 biosdev = va_arg(ap, int); 826 d = alloc_biosdisk(biosdev); 827 if (d == NULL) { 828 error = ENXIO; 829 goto out; 830 } 831 832 partition = va_arg(ap, int); 833 #ifdef _STANDALONE 834 bi_disk.biosdev = d->ll.dev; 835 bi_disk.partition = partition; 836 bi_disk.labelsector = -1; 837 838 bi_wedge.biosdev = d->ll.dev; 839 bi_wedge.matchblk = -1; 840 #endif 841 842 #if !defined(NO_DISKLABEL) || !defined(NO_GPT) 843 error = read_partitions(d); 844 if (error == -1) { 845 error = 0; 846 goto nolabel; 847 } 848 if (error) 849 goto out; 850 851 if (partition >= BIOSDISKNPART || 852 d->part[partition].fstype == FS_UNUSED) { 853 #ifdef DISK_DEBUG 854 printf("illegal partition\n"); 855 #endif 856 error = EPART; 857 goto out; 858 } 859 860 d->boff = d->part[partition].offset; 861 862 if (d->part[partition].fstype == FS_RAID) 863 d->boff += RF_PROTECTED_SECTORS; 864 865 #ifdef _STANDALONE 866 bi_wedge.startblk = d->part[partition].offset; 867 bi_wedge.nblks = d->part[partition].size; 868 #endif 869 870 nolabel: 871 #endif 872 #ifdef DISK_DEBUG 873 printf("partition @%"PRId64"\n", d->boff); 874 #endif 875 876 #ifdef _STANDALONE 877 add_biosdisk_bootinfo(); 878 #endif 879 880 f->f_devdata = d; 881 out: 882 va_end(ap); 883 if (error) 884 dealloc(d, sizeof(*d)); 885 return error; 886 } 887 888 #ifndef LIBSA_NO_FS_CLOSE 889 int 890 biosdisk_close(struct open_file *f) 891 { 892 struct biosdisk *d = f->f_devdata; 893 894 /* let the floppy drive go off */ 895 if (d->ll.type == BIOSDISK_TYPE_FD) 896 wait_sec(3); /* 2s is enough on all PCs I found */ 897 898 dealloc(d, sizeof(*d)); 899 f->f_devdata = NULL; 900 return 0; 901 } 902 #endif 903 904 int 905 biosdisk_ioctl(struct open_file *f, u_long cmd, void *arg) 906 { 907 return EIO; 908 } 909
Indexes created Tue Sep 23 07:09:52 GMT 2025