1 /* $NetBSD: md.c,v 1.11 2018/06/03 18:59:45 christos Exp $ */ 2 3 /* 4 * Copyright 1997 Piermont Information Systems Inc. 5 * All rights reserved. 6 * 7 * Based on code written by Philip A. Nelson for Piermont Information 8 * Systems Inc. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. The name of Piermont Information Systems Inc. may not be used to endorse 19 * or promote products derived from this software without specific prior 20 * written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY PIERMONT INFORMATION SYSTEMS INC. ``AS IS'' 23 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL PIERMONT INFORMATION SYSTEMS INC. BE 26 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 32 * THE POSSIBILITY OF SUCH DAMAGE. 33 */ 34 35 /* md.c -- i386 machine specific routines - also used by amd64 */ 36 37 #include <sys/param.h> 38 #include <sys/sysctl.h> 39 #include <sys/exec.h> 40 #include <sys/utsname.h> 41 #include <sys/types.h> 42 #include <sys/stat.h> 43 #include <machine/cpu.h> 44 #include <stdio.h> 45 #include <stddef.h> 46 #include <util.h> 47 #include <dirent.h> 48 #include <termios.h> 49 50 #include "defs.h" 51 #include "md.h" 52 #include "endian.h" 53 #include "msg_defs.h" 54 #include "menu_defs.h" 55 56 #ifdef NO_LBA_READS /* for testing */ 57 #undef BIFLAG_EXTINT13 58 #define BIFLAG_EXTINT13 0 59 #endif 60 61 static struct biosdisk_info *biosdisk = NULL; 62 63 /* prototypes */ 64 65 static int get_bios_info(char *); 66 static int mbr_root_above_chs(void); 67 static void md_upgrade_mbrtype(void); 68 static int md_read_bootcode(const char *, struct mbr_sector *); 69 static unsigned int get_bootmodel(void); 70 71 void 72 md_init(void) 73 { 74 } 75 76 void 77 md_init_set_status(int flags) 78 { 79 (void)flags; 80 81 /* Default to install same type of kernel as we are running */ 82 set_kernel_set(get_bootmodel()); 83 } 84 85 int 86 md_get_info(void) 87 { 88 mbr_info_t *ext; 89 struct mbr_partition *p; 90 const char *bootcode; 91 int i; 92 int names, fl, ofl; 93 #define ACTIVE_FOUND 0x0100 94 #define NETBSD_ACTIVE 0x0200 95 #define NETBSD_NAMED 0x0400 96 #define ACTIVE_NAMED 0x0800 97 98 if (pm->no_mbr) 99 return 1; 100 101 if (read_mbr(pm->diskdev, &mbr) < 0) 102 memset(&mbr.mbr, 0, sizeof mbr.mbr - 2); 103 get_bios_info(pm->diskdev); 104 105 edit: 106 if (edit_mbr(&mbr) == 0) 107 return 0; 108 109 root_limit = 0; 110 if (biosdisk != NULL && (biosdisk->bi_flags & BIFLAG_EXTINT13) == 0) { 111 if (mbr_root_above_chs()) { 112 msg_display(MSG_partabovechs); 113 if (!ask_noyes(NULL)) 114 goto edit; 115 /* The user is shooting themselves in the foot here...*/ 116 } else 117 root_limit = bcyl * bhead * bsec; 118 } 119 120 /* 121 * Ensure the install partition (at sector pm->ptstart) and the active 122 * partition are bootable. 123 * Determine whether the bootselect code is needed. 124 * Note that MBR_BS_NEWMBR is always set, so we ignore it! 125 */ 126 fl = 0; 127 names = 0; 128 for (ext = &mbr; ext != NULL; ext = ext->extended) { 129 p = ext->mbr.mbr_parts; 130 for (i = 0; i < MBR_PART_COUNT; p++, i++) { 131 if (p->mbrp_flag == MBR_PFLAG_ACTIVE) { 132 fl |= ACTIVE_FOUND; 133 if (ext->sector + p->mbrp_start == pm->ptstart) 134 fl |= NETBSD_ACTIVE; 135 } 136 if (ext->mbrb.mbrbs_nametab[i][0] == 0) { 137 /* No bootmenu label... */ 138 if (ext->sector == 0) 139 continue; 140 if (ext->sector + p->mbrp_start == pm->ptstart) 141 /* 142 * Have installed into an extended ptn 143 * force name & bootsel... 144 */ 145 names++; 146 continue; 147 } 148 /* Partition has a bootmenu label... */ 149 if (ext->sector != 0) 150 fl |= MBR_BS_EXTLBA; 151 if (ext->sector + p->mbrp_start == pm->ptstart) 152 fl |= NETBSD_NAMED; 153 else if (p->mbrp_flag == MBR_PFLAG_ACTIVE) 154 fl |= ACTIVE_NAMED; 155 else 156 names++; 157 } 158 } 159 if (!(fl & ACTIVE_FOUND)) 160 fl |= NETBSD_ACTIVE; 161 if (fl & NETBSD_NAMED && fl & NETBSD_ACTIVE) 162 fl |= ACTIVE_NAMED; 163 164 if ((names > 0 || !(fl & NETBSD_ACTIVE)) && 165 (!(fl & NETBSD_NAMED) || !(fl & ACTIVE_NAMED))) { 166 /* 167 * There appear to be multiple bootable partitions, but they 168 * don't all have bootmenu texts. 169 */ 170 msg_display(MSG_missing_bootmenu_text); 171 if (ask_yesno(NULL)) 172 goto edit; 173 } 174 175 if ((fl & MBR_BS_EXTLBA) && 176 (biosdisk == NULL || !(biosdisk->bi_flags & BIFLAG_EXTINT13))) { 177 /* Need unsupported LBA reads to read boot sectors */ 178 msg_display(MSG_no_extended_bootmenu); 179 if (!ask_noyes(NULL)) 180 goto edit; 181 } 182 183 /* Sort out the name of the mbr code we need */ 184 if (names > 0 || fl & (NETBSD_NAMED | ACTIVE_NAMED)) { 185 /* Need bootselect code */ 186 fl |= MBR_BS_ACTIVE; 187 bootcode = fl & MBR_BS_EXTLBA ? _PATH_BOOTEXT : _PATH_BOOTSEL; 188 } else 189 bootcode = _PATH_MBR; 190 191 fl &= MBR_BS_ACTIVE | MBR_BS_EXTLBA; 192 193 /* Look at what is installed */ 194 ofl = mbr.mbrb.mbrbs_flags; 195 if (ofl == 0) { 196 /* Check there is some bootcode at all... */ 197 if (mbr.mbr.mbr_magic != htole16(MBR_MAGIC) || 198 mbr.mbr.mbr_jmpboot[0] == 0 || 199 mbr_root_above_chs()) 200 /* Existing won't do, force update */ 201 fl |= MBR_BS_NEWMBR; 202 } 203 ofl = mbr.oflags & (MBR_BS_ACTIVE | MBR_BS_EXTLBA); 204 205 if (fl & ~ofl || (fl == 0 && ofl & MBR_BS_ACTIVE)) { 206 /* Existing boot code isn't the right one... */ 207 if (fl & MBR_BS_ACTIVE) 208 msg_display(MSG_installbootsel); 209 else 210 msg_display(MSG_installmbr); 211 } else 212 /* Existing code would (probably) be ok */ 213 msg_display(MSG_updatembr); 214 215 if (!ask_yesno(NULL)) 216 /* User doesn't want to update mbr code */ 217 return 1; 218 219 if (md_read_bootcode(bootcode, &mbr.mbr) == 0) 220 /* update suceeded - to memory copy */ 221 return 1; 222 223 /* This shouldn't happen since the files are in the floppy fs... */ 224 msg_display("Can't find %s", bootcode); 225 ask_yesno(NULL); 226 227 return 1; 228 } 229 230 /* 231 * md back-end code for menu-driven BSD disklabel editor. 232 */ 233 int 234 md_make_bsd_partitions(void) 235 { 236 return make_bsd_partitions(); 237 } 238 239 /* 240 * any additional partition validation 241 */ 242 int 243 md_check_partitions(void) 244 { 245 int rval; 246 char *bootxx; 247 248 /* check we have boot code for the root partition type */ 249 bootxx = bootxx_name(); 250 rval = access(bootxx, R_OK); 251 free(bootxx); 252 if (rval == 0) 253 return 1; 254 process_menu(MENU_ok, __UNCONST(MSG_No_Bootcode)); 255 return 0; 256 } 257 258 /* 259 * hook called before writing new disklabel. 260 */ 261 int 262 md_pre_disklabel(void) 263 { 264 if (pm->no_mbr) 265 return 0; 266 267 msg_display(MSG_dofdisk); 268 269 /* write edited MBR onto disk. */ 270 if (write_mbr(pm->diskdev, &mbr, 1) != 0) { 271 msg_display(MSG_wmbrfail); 272 process_menu(MENU_ok, NULL); 273 return 1; 274 } 275 return 0; 276 } 277 278 /* 279 * hook called after writing disklabel to new target disk. 280 */ 281 int 282 md_post_disklabel(void) 283 { 284 return 0; 285 } 286 287 /* 288 * hook called after upgrade() or install() has finished setting 289 * up the target disk but immediately before the user is given the 290 * ``disks are now set up'' message. 291 */ 292 int 293 md_post_newfs(void) 294 { 295 int ret; 296 size_t len; 297 char boot_options[1024]; 298 char *bootxx_filename; 299 /* 300 * XXX - this code retains a lot of cruft from when we went 301 * to great pains to exclude installboot from the ramdisk 302 * for size reasons and should be rewritten. 303 */ 304 static const char *consoles[]={ 305 "pc", /* CONSDEV_PC */ 306 "com0", /* CONSDEV_COM0 */ 307 "com1", /* CONSDEV_COM1 */ 308 "com2", /* CONSDEV_COM2 */ 309 "com3", /* CONSDEV_COM3 */ 310 "com0kbd", /* CONSDEV_COM0KBD */ 311 "com1kbd", /* CONSDEV_COM1KBD */ 312 "com2kbd", /* CONSDEV_COM2KBD */ 313 "com3kbd" /* CONSDEV_COM3KBD */ }; 314 static struct x86_boot_params boottype = 315 {sizeof boottype, 0, 5, 0, 9600, { '\0' }, "", 0}; 316 static int conmib[] = {CTL_MACHDEP, CPU_CONSDEV}; 317 struct termios t; 318 dev_t condev; 319 320 /* 321 * Get console device, should either be ttyE0 or tty0n. 322 * Too hard to double check, so just 'know' the device numbers. 323 */ 324 len = sizeof condev; 325 if (sysctl(conmib, __arraycount(conmib), &condev, &len, NULL, 0) != -1 326 && (condev & ~3) == 0x800) { 327 /* Motherboard serial port */ 328 boottype.bp_consdev = (condev & 3) + 1; 329 /* Defaulting the baud rate to that of stdin should suffice */ 330 if (tcgetattr(0, &t) != -1) 331 boottype.bp_conspeed = t.c_ispeed; 332 } 333 334 if (pm == NULL || !pm->no_part) { 335 /* 336 * Get console device, should either be ttyE0 or tty0n. 337 * Too hard to double check, so just 'know' the device numbers. 338 */ 339 len = sizeof condev; 340 if (sysctl(conmib, nelem(conmib), &condev, &len, NULL, 0) != -1 341 && (condev & ~3) == 0x800) { 342 /* Motherboard serial port */ 343 boottype.bp_consdev = (condev & 3) + 1; 344 /* Defaulting the baud rate to that of stdin should suffice */ 345 if (tcgetattr(0, &t) != -1) 346 boottype.bp_conspeed = t.c_ispeed; 347 } 348 349 process_menu(MENU_getboottype, &boottype); 350 msg_display(MSG_dobootblks, pm->diskdev); 351 if (boottype.bp_consdev == ~0u) 352 /* Use existing bootblocks */ 353 return 0; 354 } 355 356 ret = cp_to_target("/usr/mdec/boot", "/boot"); 357 if (ret) 358 return ret; 359 if (pm && pm->no_part) 360 return 0; 361 362 bootxx_filename = bootxx_name(); 363 if (bootxx_filename != NULL) { 364 snprintf(boot_options, sizeof boot_options, 365 "console=%s,speed=%u", consoles[boottype.bp_consdev], 366 boottype.bp_conspeed); 367 if (pm->isspecial) { 368 ret = run_program(RUN_DISPLAY, 369 "/usr/sbin/installboot -o %s /dev/r%s %s", 370 boot_options, pm->diskdev, bootxx_filename); 371 } else { 372 ret = run_program(RUN_DISPLAY, 373 "/usr/sbin/installboot -o %s /dev/r%s%c %s", 374 boot_options, pm->diskdev, 'a' + pm->rootpart, 375 bootxx_filename); 376 } 377 free(bootxx_filename); 378 } else 379 ret = -1; 380 381 if (ret != 0) 382 process_menu(MENU_ok, 383 __UNCONST("Warning: disk is probably not bootable")); 384 385 return ret; 386 } 387 388 int 389 md_post_extract(void) 390 { 391 return 0; 392 } 393 394 void 395 md_cleanup_install(void) 396 { 397 #ifndef DEBUG 398 enable_rc_conf(); 399 add_rc_conf("wscons=YES\n"); 400 401 # if defined(__i386__) && defined(SET_KERNEL_TINY) 402 /* 403 * For GENERIC_TINY, do not enable any extra screens or wsmux. 404 * Otherwise, run getty on 4 VTs. 405 */ 406 if (get_kernel_set() == SET_KERNEL_TINY) 407 run_program(RUN_CHROOT, 408 "sed -an -e '/^screen/s/^/#/;/^mux/s/^/#/;" 409 "H;$!d;g;w /etc/wscons.conf' /etc/wscons.conf"); 410 else 411 # endif 412 run_program(RUN_CHROOT, 413 "sed -an -e '/^ttyE[1-9]/s/off/on/;" 414 "H;$!d;g;w /etc/ttys' /etc/ttys"); 415 416 #endif 417 } 418 419 int 420 md_pre_update(void) 421 { 422 return 1; 423 } 424 425 /* Upgrade support */ 426 int 427 md_update(void) 428 { 429 md_post_newfs(); 430 md_upgrade_mbrtype(); 431 return 1; 432 } 433 434 int 435 md_check_mbr(mbr_info_t *mbri) 436 { 437 return 2; 438 } 439 440 int 441 md_mbr_use_wholedisk(mbr_info_t *mbri) 442 { 443 return mbr_use_wholedisk(mbri); 444 } 445 446 static int 447 get_bios_info(char *dev) 448 { 449 static struct disklist *disklist = NULL; 450 static int mib[2] = {CTL_MACHDEP, CPU_DISKINFO}; 451 int i; 452 size_t len; 453 struct biosdisk_info *bip; 454 struct nativedisk_info *nip = NULL, *nat; 455 int cyl, head; 456 daddr_t sec; 457 458 if (disklist == NULL) { 459 if (sysctl(mib, 2, NULL, &len, NULL, 0) < 0) 460 goto nogeom; 461 disklist = malloc(len); 462 if (disklist == NULL) { 463 fprintf(stderr, "Out of memory\n"); 464 return -1; 465 } 466 sysctl(mib, 2, disklist, &len, NULL, 0); 467 } 468 469 for (i = 0; i < disklist->dl_nnativedisks; i++) { 470 nat = &disklist->dl_nativedisks[i]; 471 if (!strcmp(dev, nat->ni_devname)) { 472 nip = nat; 473 break; 474 } 475 } 476 if (nip == NULL || nip->ni_nmatches == 0) { 477 nogeom: 478 if (nip != NULL) 479 msg_display(MSG_nobiosgeom, pm->dlcyl, pm->dlhead, pm->dlsec); 480 if (guess_biosgeom_from_mbr(&mbr, &cyl, &head, &sec) >= 0 481 && nip != NULL) 482 msg_display_add(MSG_biosguess, cyl, head, sec); 483 biosdisk = NULL; 484 } else { 485 guess_biosgeom_from_mbr(&mbr, &cyl, &head, &sec); 486 if (nip->ni_nmatches == 1) { 487 bip = &disklist->dl_biosdisks[nip->ni_biosmatches[0]]; 488 msg_display(MSG_onebiosmatch); 489 msg_table_add(MSG_onebiosmatch_header); 490 msg_table_add(MSG_onebiosmatch_row, bip->bi_dev, 491 bip->bi_cyl, bip->bi_head, bip->bi_sec, 492 (unsigned)bip->bi_lbasecs, 493 (unsigned)(bip->bi_lbasecs / (1000000000 / 512))); 494 msg_display_add(MSG_biosgeom_advise); 495 biosdisk = bip; 496 process_menu(MENU_biosonematch, &biosdisk); 497 } else { 498 msg_display(MSG_biosmultmatch); 499 msg_table_add(MSG_biosmultmatch_header); 500 for (i = 0; i < nip->ni_nmatches; i++) { 501 bip = &disklist->dl_biosdisks[ 502 nip->ni_biosmatches[i]]; 503 msg_table_add(MSG_biosmultmatch_row, i, 504 bip->bi_dev, bip->bi_cyl, bip->bi_head, 505 bip->bi_sec, (unsigned)bip->bi_lbasecs, 506 (unsigned)bip->bi_lbasecs/(1000000000/512)); 507 } 508 process_menu(MENU_biosmultmatch, &i); 509 if (i == -1) 510 biosdisk = NULL; 511 else 512 biosdisk = &disklist->dl_biosdisks[ 513 nip->ni_biosmatches[i]]; 514 } 515 } 516 if (biosdisk == NULL) { 517 if (nip != NULL) { 518 set_bios_geom(cyl, head, sec); 519 } else { 520 bcyl = cyl; 521 bhead = head; 522 bsec = sec; 523 } 524 } else { 525 bcyl = biosdisk->bi_cyl; 526 bhead = biosdisk->bi_head; 527 bsec = biosdisk->bi_sec; 528 } 529 return 0; 530 } 531 532 static int 533 mbr_root_above_chs(void) 534 { 535 return pm->ptstart + DEFROOTSIZE * (MEG / 512) >= bcyl * bhead * bsec; 536 } 537 538 static void 539 md_upgrade_mbrtype(void) 540 { 541 struct mbr_partition *mbrp; 542 int i, netbsdpart = -1, oldbsdpart = -1, oldbsdcount = 0; 543 544 if (pm->no_mbr) 545 return; 546 547 if (read_mbr(pm->diskdev, &mbr) < 0) 548 return; 549 550 mbrp = &mbr.mbr.mbr_parts[0]; 551 552 for (i = 0; i < MBR_PART_COUNT; i++) { 553 if (mbrp[i].mbrp_type == MBR_PTYPE_386BSD) { 554 oldbsdpart = i; 555 oldbsdcount++; 556 } else if (mbrp[i].mbrp_type == MBR_PTYPE_NETBSD) 557 netbsdpart = i; 558 } 559 560 if (netbsdpart == -1 && oldbsdcount == 1) { 561 mbrp[oldbsdpart].mbrp_type = MBR_PTYPE_NETBSD; 562 write_mbr(pm->diskdev, &mbr, 0); 563 } 564 } 565 566 /* 567 * Read MBR code from a file. 568 * The existing partition table and bootselect configuration is kept. 569 */ 570 static int 571 md_read_bootcode(const char *path, struct mbr_sector *mbrs) 572 { 573 int fd; 574 struct stat st; 575 size_t len; 576 struct mbr_sector new_mbr; 577 uint32_t dsn; 578 579 fd = open(path, O_RDONLY); 580 if (fd < 0) 581 return -1; 582 583 if (fstat(fd, &st) < 0 || st.st_size != sizeof *mbrs) { 584 close(fd); 585 return -1; 586 } 587 588 if (read(fd, &new_mbr, sizeof new_mbr) != sizeof new_mbr) { 589 close(fd); 590 return -1; 591 } 592 close(fd); 593 594 if (new_mbr.mbr_bootsel_magic != htole16(MBR_BS_MAGIC)) 595 return -1; 596 597 if (mbrs->mbr_bootsel_magic == htole16(MBR_BS_MAGIC)) { 598 len = offsetof(struct mbr_sector, mbr_bootsel); 599 } else 600 len = offsetof(struct mbr_sector, mbr_parts); 601 602 /* Preserve the 'drive serial number' - especially for Vista */ 603 dsn = mbrs->mbr_dsn; 604 memcpy(mbrs, &new_mbr, len); 605 mbrs->mbr_dsn = dsn; 606 607 /* Keep flags from object file - indicate the properties */ 608 mbrs->mbr_bootsel.mbrbs_flags = new_mbr.mbr_bootsel.mbrbs_flags; 609 mbrs->mbr_magic = htole16(MBR_MAGIC); 610 611 return 0; 612 } 613 614 static unsigned int 615 get_bootmodel(void) 616 { 617 #if defined(__i386__) 618 struct utsname ut; 619 #ifdef DEBUG 620 char *envstr; 621 622 envstr = getenv("BOOTMODEL"); 623 if (envstr != NULL) 624 return atoi(envstr); 625 #endif 626 627 if (uname(&ut) < 0) 628 ut.version[0] = 0; 629 630 #if defined(SET_KERNEL_TINY) 631 if (strstr(ut.version, "TINY") != NULL) 632 return SET_KERNEL_TINY; 633 #endif 634 #if defined(SET_KERNEL_PS2) 635 if (strstr(ut.version, "PS2") != NULL) 636 return SET_KERNEL_PS2; 637 #endif 638 #endif 639 return SET_KERNEL_GENERIC; 640 } 641 642 643 int 644 md_pre_mount() 645 { 646 return 0; 647 } 648