zfsboot.c revision 305615
1/*- 2 * Copyright (c) 1998 Robert Nordier 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms are freely 6 * permitted provided that the above copyright notice and this 7 * paragraph and the following disclaimer are duplicated in all 8 * such forms. 9 * 10 * This software is provided "AS IS" and without any express or 11 * implied warranties, including, without limitation, the implied 12 * warranties of merchantability and fitness for a particular 13 * purpose. 14 */ 15 16#include <sys/cdefs.h> 17__FBSDID("$FreeBSD: stable/10/sys/boot/i386/zfsboot/zfsboot.c 305615 2016-09-08 15:06:28Z pfg $"); 18 19#include <sys/param.h> 20#include <sys/errno.h> 21#include <sys/diskmbr.h> 22#ifdef GPT 23#include <sys/gpt.h> 24#endif 25#include <sys/reboot.h> 26#include <sys/queue.h> 27 28#include <machine/bootinfo.h> 29#include <machine/elf.h> 30#include <machine/pc/bios.h> 31 32#include <stdarg.h> 33#include <stddef.h> 34 35#include <a.out.h> 36 37#include <btxv86.h> 38 39#include "lib.h" 40#include "rbx.h" 41#include "drv.h" 42#include "util.h" 43#include "cons.h" 44#include "bootargs.h" 45#include "paths.h" 46 47#include "libzfs.h" 48 49#define ARGS 0x900 50#define NOPT 14 51#define NDEV 3 52 53#define BIOS_NUMDRIVES 0x475 54#define DRV_HARD 0x80 55#define DRV_MASK 0x7f 56 57#define TYPE_AD 0 58#define TYPE_DA 1 59#define TYPE_MAXHARD TYPE_DA 60#define TYPE_FD 2 61 62extern uint32_t _end; 63 64#ifdef GPT 65static const uuid_t freebsd_zfs_uuid = GPT_ENT_TYPE_FREEBSD_ZFS; 66#endif 67static const char optstr[NOPT] = "DhaCcdgmnpqrsv"; /* Also 'P', 'S' */ 68static const unsigned char flags[NOPT] = { 69 RBX_DUAL, 70 RBX_SERIAL, 71 RBX_ASKNAME, 72 RBX_CDROM, 73 RBX_CONFIG, 74 RBX_KDB, 75 RBX_GDB, 76 RBX_MUTE, 77 RBX_NOINTR, 78 RBX_PAUSE, 79 RBX_QUIET, 80 RBX_DFLTROOT, 81 RBX_SINGLE, 82 RBX_VERBOSE 83}; 84uint32_t opts; 85 86static const unsigned char dev_maj[NDEV] = {30, 4, 2}; 87 88static char cmd[512]; 89static char cmddup[512]; 90static char kname[1024]; 91static char rootname[256]; 92static int comspeed = SIOSPD; 93static struct bootinfo bootinfo; 94static uint32_t bootdev; 95static struct zfs_boot_args zfsargs; 96static struct zfsmount zfsmount; 97 98vm_offset_t high_heap_base; 99uint32_t bios_basemem, bios_extmem, high_heap_size; 100 101static struct bios_smap smap; 102 103/* 104 * The minimum amount of memory to reserve in bios_extmem for the heap. 105 */ 106#define HEAP_MIN (3 * 1024 * 1024) 107 108static char *heap_next; 109static char *heap_end; 110 111/* Buffers that must not span a 64k boundary. */ 112#define READ_BUF_SIZE 8192 113struct dmadat { 114 char rdbuf[READ_BUF_SIZE]; /* for reading large things */ 115 char secbuf[READ_BUF_SIZE]; /* for MBR/disklabel */ 116}; 117static struct dmadat *dmadat; 118 119void exit(int); 120static void load(void); 121static int parse(void); 122static void bios_getmem(void); 123 124static void * 125malloc(size_t n) 126{ 127 char *p = heap_next; 128 if (p + n > heap_end) { 129 printf("malloc failure\n"); 130 for (;;) 131 ; 132 return 0; 133 } 134 heap_next += n; 135 return p; 136} 137 138static char * 139strdup(const char *s) 140{ 141 char *p = malloc(strlen(s) + 1); 142 strcpy(p, s); 143 return p; 144} 145 146#include "zfsimpl.c" 147 148/* 149 * Read from a dnode (which must be from a ZPL filesystem). 150 */ 151static int 152zfs_read(spa_t *spa, const dnode_phys_t *dnode, off_t *offp, void *start, size_t size) 153{ 154 const znode_phys_t *zp = (const znode_phys_t *) dnode->dn_bonus; 155 size_t n; 156 int rc; 157 158 n = size; 159 if (*offp + n > zp->zp_size) 160 n = zp->zp_size - *offp; 161 162 rc = dnode_read(spa, dnode, *offp, start, n); 163 if (rc) 164 return (-1); 165 *offp += n; 166 167 return (n); 168} 169 170/* 171 * Current ZFS pool 172 */ 173static spa_t *spa; 174static spa_t *primary_spa; 175static vdev_t *primary_vdev; 176 177/* 178 * A wrapper for dskread that doesn't have to worry about whether the 179 * buffer pointer crosses a 64k boundary. 180 */ 181static int 182vdev_read(vdev_t *vdev, void *priv, off_t off, void *buf, size_t bytes) 183{ 184 char *p; 185 daddr_t lba; 186 unsigned int nb; 187 struct dsk *dsk = (struct dsk *) priv; 188 189 if ((off & (DEV_BSIZE - 1)) || (bytes & (DEV_BSIZE - 1))) 190 return -1; 191 192 p = buf; 193 lba = off / DEV_BSIZE; 194 lba += dsk->start; 195 while (bytes > 0) { 196 nb = bytes / DEV_BSIZE; 197 if (nb > READ_BUF_SIZE / DEV_BSIZE) 198 nb = READ_BUF_SIZE / DEV_BSIZE; 199 if (drvread(dsk, dmadat->rdbuf, lba, nb)) 200 return -1; 201 memcpy(p, dmadat->rdbuf, nb * DEV_BSIZE); 202 p += nb * DEV_BSIZE; 203 lba += nb; 204 bytes -= nb * DEV_BSIZE; 205 } 206 207 return 0; 208} 209 210static int 211xfsread(const dnode_phys_t *dnode, off_t *offp, void *buf, size_t nbyte) 212{ 213 if ((size_t)zfs_read(spa, dnode, offp, buf, nbyte) != nbyte) { 214 printf("Invalid format\n"); 215 return -1; 216 } 217 return 0; 218} 219 220static void 221bios_getmem(void) 222{ 223 uint64_t size; 224 225 /* Parse system memory map */ 226 v86.ebx = 0; 227 do { 228 v86.ctl = V86_FLAGS; 229 v86.addr = 0x15; /* int 0x15 function 0xe820*/ 230 v86.eax = 0xe820; 231 v86.ecx = sizeof(struct bios_smap); 232 v86.edx = SMAP_SIG; 233 v86.es = VTOPSEG(&smap); 234 v86.edi = VTOPOFF(&smap); 235 v86int(); 236 if (V86_CY(v86.efl) || (v86.eax != SMAP_SIG)) 237 break; 238 /* look for a low-memory segment that's large enough */ 239 if ((smap.type == SMAP_TYPE_MEMORY) && (smap.base == 0) && 240 (smap.length >= (512 * 1024))) 241 bios_basemem = smap.length; 242 /* look for the first segment in 'extended' memory */ 243 if ((smap.type == SMAP_TYPE_MEMORY) && (smap.base == 0x100000)) { 244 bios_extmem = smap.length; 245 } 246 247 /* 248 * Look for the largest segment in 'extended' memory beyond 249 * 1MB but below 4GB. 250 */ 251 if ((smap.type == SMAP_TYPE_MEMORY) && (smap.base > 0x100000) && 252 (smap.base < 0x100000000ull)) { 253 size = smap.length; 254 255 /* 256 * If this segment crosses the 4GB boundary, truncate it. 257 */ 258 if (smap.base + size > 0x100000000ull) 259 size = 0x100000000ull - smap.base; 260 261 if (size > high_heap_size) { 262 high_heap_size = size; 263 high_heap_base = smap.base; 264 } 265 } 266 } while (v86.ebx != 0); 267 268 /* Fall back to the old compatibility function for base memory */ 269 if (bios_basemem == 0) { 270 v86.ctl = 0; 271 v86.addr = 0x12; /* int 0x12 */ 272 v86int(); 273 274 bios_basemem = (v86.eax & 0xffff) * 1024; 275 } 276 277 /* Fall back through several compatibility functions for extended memory */ 278 if (bios_extmem == 0) { 279 v86.ctl = V86_FLAGS; 280 v86.addr = 0x15; /* int 0x15 function 0xe801*/ 281 v86.eax = 0xe801; 282 v86int(); 283 if (!V86_CY(v86.efl)) { 284 bios_extmem = ((v86.ecx & 0xffff) + ((v86.edx & 0xffff) * 64)) * 1024; 285 } 286 } 287 if (bios_extmem == 0) { 288 v86.ctl = 0; 289 v86.addr = 0x15; /* int 0x15 function 0x88*/ 290 v86.eax = 0x8800; 291 v86int(); 292 bios_extmem = (v86.eax & 0xffff) * 1024; 293 } 294 295 /* 296 * If we have extended memory and did not find a suitable heap 297 * region in the SMAP, use the last 3MB of 'extended' memory as a 298 * high heap candidate. 299 */ 300 if (bios_extmem >= HEAP_MIN && high_heap_size < HEAP_MIN) { 301 high_heap_size = HEAP_MIN; 302 high_heap_base = bios_extmem + 0x100000 - HEAP_MIN; 303 } 304} 305 306/* 307 * Try to detect a device supported by the legacy int13 BIOS 308 */ 309static int 310int13probe(int drive) 311{ 312 v86.ctl = V86_FLAGS; 313 v86.addr = 0x13; 314 v86.eax = 0x800; 315 v86.edx = drive; 316 v86int(); 317 318 if (!V86_CY(v86.efl) && /* carry clear */ 319 ((v86.edx & 0xff) != (drive & DRV_MASK))) { /* unit # OK */ 320 if ((v86.ecx & 0x3f) == 0) { /* absurd sector size */ 321 return(0); /* skip device */ 322 } 323 return (1); 324 } 325 return(0); 326} 327 328/* 329 * We call this when we find a ZFS vdev - ZFS consumes the dsk 330 * structure so we must make a new one. 331 */ 332static struct dsk * 333copy_dsk(struct dsk *dsk) 334{ 335 struct dsk *newdsk; 336 337 newdsk = malloc(sizeof(struct dsk)); 338 *newdsk = *dsk; 339 return (newdsk); 340} 341 342static void 343probe_drive(struct dsk *dsk) 344{ 345#ifdef GPT 346 struct gpt_hdr hdr; 347 struct gpt_ent *ent; 348 daddr_t slba, elba; 349 unsigned part, entries_per_sec; 350#endif 351 struct dos_partition *dp; 352 char *sec; 353 unsigned i; 354 355 /* 356 * If we find a vdev on the whole disk, stop here. Otherwise dig 357 * out the partition table and probe each slice/partition 358 * in turn for a vdev. 359 */ 360 if (vdev_probe(vdev_read, dsk, NULL) == 0) 361 return; 362 363 sec = dmadat->secbuf; 364 dsk->start = 0; 365 366#ifdef GPT 367 /* 368 * First check for GPT. 369 */ 370 if (drvread(dsk, sec, 1, 1)) { 371 return; 372 } 373 memcpy(&hdr, sec, sizeof(hdr)); 374 if (memcmp(hdr.hdr_sig, GPT_HDR_SIG, sizeof(hdr.hdr_sig)) != 0 || 375 hdr.hdr_lba_self != 1 || hdr.hdr_revision < 0x00010000 || 376 hdr.hdr_entsz < sizeof(*ent) || DEV_BSIZE % hdr.hdr_entsz != 0) { 377 goto trymbr; 378 } 379 380 /* 381 * Probe all GPT partitions for the presense of ZFS pools. We 382 * return the spa_t for the first we find (if requested). This 383 * will have the effect of booting from the first pool on the 384 * disk. 385 */ 386 entries_per_sec = DEV_BSIZE / hdr.hdr_entsz; 387 slba = hdr.hdr_lba_table; 388 elba = slba + hdr.hdr_entries / entries_per_sec; 389 while (slba < elba) { 390 dsk->start = 0; 391 if (drvread(dsk, sec, slba, 1)) 392 return; 393 for (part = 0; part < entries_per_sec; part++) { 394 ent = (struct gpt_ent *)(sec + part * hdr.hdr_entsz); 395 if (memcmp(&ent->ent_type, &freebsd_zfs_uuid, 396 sizeof(uuid_t)) == 0) { 397 dsk->start = ent->ent_lba_start; 398 if (vdev_probe(vdev_read, dsk, NULL) == 0) { 399 /* 400 * This slice had a vdev. We need a new dsk 401 * structure now since the vdev now owns this one. 402 */ 403 dsk = copy_dsk(dsk); 404 } 405 } 406 } 407 slba++; 408 } 409 return; 410trymbr: 411#endif 412 413 if (drvread(dsk, sec, DOSBBSECTOR, 1)) 414 return; 415 dp = (void *)(sec + DOSPARTOFF); 416 417 for (i = 0; i < NDOSPART; i++) { 418 if (!dp[i].dp_typ) 419 continue; 420 dsk->start = dp[i].dp_start; 421 if (vdev_probe(vdev_read, dsk, NULL) == 0) { 422 /* 423 * This slice had a vdev. We need a new dsk structure now 424 * since the vdev now owns this one. 425 */ 426 dsk = copy_dsk(dsk); 427 } 428 } 429} 430 431int 432main(void) 433{ 434 int autoboot, i; 435 dnode_phys_t dn; 436 off_t off; 437 struct dsk *dsk; 438 439 dmadat = (void *)(roundup2(__base + (int32_t)&_end, 0x10000) - __base); 440 441 bios_getmem(); 442 443 if (high_heap_size > 0) { 444 heap_end = PTOV(high_heap_base + high_heap_size); 445 heap_next = PTOV(high_heap_base); 446 } else { 447 heap_next = (char *) dmadat + sizeof(*dmadat); 448 heap_end = (char *) PTOV(bios_basemem); 449 } 450 451 dsk = malloc(sizeof(struct dsk)); 452 dsk->drive = *(uint8_t *)PTOV(ARGS); 453 dsk->type = dsk->drive & DRV_HARD ? TYPE_AD : TYPE_FD; 454 dsk->unit = dsk->drive & DRV_MASK; 455 dsk->slice = *(uint8_t *)PTOV(ARGS + 1) + 1; 456 dsk->part = 0; 457 dsk->start = 0; 458 dsk->init = 0; 459 460 bootinfo.bi_version = BOOTINFO_VERSION; 461 bootinfo.bi_size = sizeof(bootinfo); 462 bootinfo.bi_basemem = bios_basemem / 1024; 463 bootinfo.bi_extmem = bios_extmem / 1024; 464 bootinfo.bi_memsizes_valid++; 465 bootinfo.bi_bios_dev = dsk->drive; 466 467 bootdev = MAKEBOOTDEV(dev_maj[dsk->type], 468 dsk->slice, dsk->unit, dsk->part); 469 470 /* Process configuration file */ 471 472 autoboot = 1; 473 474 zfs_init(); 475 476 /* 477 * Probe the boot drive first - we will try to boot from whatever 478 * pool we find on that drive. 479 */ 480 probe_drive(dsk); 481 482 /* 483 * Probe the rest of the drives that the bios knows about. This 484 * will find any other available pools and it may fill in missing 485 * vdevs for the boot pool. 486 */ 487#ifndef VIRTUALBOX 488 for (i = 0; i < *(unsigned char *)PTOV(BIOS_NUMDRIVES); i++) 489#else 490 for (i = 0; i < MAXBDDEV; i++) 491#endif 492 { 493 if ((i | DRV_HARD) == *(uint8_t *)PTOV(ARGS)) 494 continue; 495 496 if (!int13probe(i | DRV_HARD)) 497 break; 498 499 dsk = malloc(sizeof(struct dsk)); 500 dsk->drive = i | DRV_HARD; 501 dsk->type = dsk->drive & TYPE_AD; 502 dsk->unit = i; 503 dsk->slice = 0; 504 dsk->part = 0; 505 dsk->start = 0; 506 dsk->init = 0; 507 probe_drive(dsk); 508 } 509 510 /* 511 * The first discovered pool, if any, is the pool. 512 */ 513 spa = spa_get_primary(); 514 if (!spa) { 515 printf("%s: No ZFS pools located, can't boot\n", BOOTPROG); 516 for (;;) 517 ; 518 } 519 520 primary_spa = spa; 521 primary_vdev = spa_get_primary_vdev(spa); 522 523 if (zfs_spa_init(spa) != 0 || zfs_mount(spa, 0, &zfsmount) != 0) { 524 printf("%s: failed to mount default pool %s\n", 525 BOOTPROG, spa->spa_name); 526 autoboot = 0; 527 } else if (zfs_lookup(&zfsmount, PATH_CONFIG, &dn) == 0 || 528 zfs_lookup(&zfsmount, PATH_DOTCONFIG, &dn) == 0) { 529 off = 0; 530 zfs_read(spa, &dn, &off, cmd, sizeof(cmd)); 531 } 532 533 if (*cmd) { 534 /* 535 * Note that parse() is destructive to cmd[] and we also want 536 * to honor RBX_QUIET option that could be present in cmd[]. 537 */ 538 memcpy(cmddup, cmd, sizeof(cmd)); 539 if (parse()) 540 autoboot = 0; 541 if (!OPT_CHECK(RBX_QUIET)) 542 printf("%s: %s\n", PATH_CONFIG, cmddup); 543 /* Do not process this command twice */ 544 *cmd = 0; 545 } 546 547 /* 548 * Try to exec /boot/loader. If interrupted by a keypress, 549 * or in case of failure, try to load a kernel directly instead. 550 */ 551 552 if (autoboot && !*kname) { 553 memcpy(kname, PATH_LOADER_ZFS, sizeof(PATH_LOADER_ZFS)); 554 if (!keyhit(3)) { 555 load(); 556 memcpy(kname, PATH_KERNEL, sizeof(PATH_KERNEL)); 557 } 558 } 559 560 /* Present the user with the boot2 prompt. */ 561 562 for (;;) { 563 if (!autoboot || !OPT_CHECK(RBX_QUIET)) { 564 printf("\nFreeBSD/x86 boot\n"); 565 if (zfs_rlookup(spa, zfsmount.rootobj, rootname) != 0) 566 printf("Default: %s/<0x%llx>:%s\n" 567 "boot: ", 568 spa->spa_name, zfsmount.rootobj, kname); 569 else if (rootname[0] != '\0') 570 printf("Default: %s/%s:%s\n" 571 "boot: ", 572 spa->spa_name, rootname, kname); 573 else 574 printf("Default: %s:%s\n" 575 "boot: ", 576 spa->spa_name, kname); 577 } 578 if (ioctrl & IO_SERIAL) 579 sio_flush(); 580 if (!autoboot || keyhit(5)) 581 getstr(cmd, sizeof(cmd)); 582 else if (!autoboot || !OPT_CHECK(RBX_QUIET)) 583 putchar('\n'); 584 autoboot = 0; 585 if (parse()) 586 putchar('\a'); 587 else 588 load(); 589 } 590} 591 592/* XXX - Needed for btxld to link the boot2 binary; do not remove. */ 593void 594exit(int x) 595{ 596} 597 598static void 599load(void) 600{ 601 union { 602 struct exec ex; 603 Elf32_Ehdr eh; 604 } hdr; 605 static Elf32_Phdr ep[2]; 606 static Elf32_Shdr es[2]; 607 caddr_t p; 608 dnode_phys_t dn; 609 off_t off; 610 uint32_t addr, x; 611 int fmt, i, j; 612 613 if (zfs_lookup(&zfsmount, kname, &dn)) { 614 printf("\nCan't find %s\n", kname); 615 return; 616 } 617 off = 0; 618 if (xfsread(&dn, &off, &hdr, sizeof(hdr))) 619 return; 620 if (N_GETMAGIC(hdr.ex) == ZMAGIC) 621 fmt = 0; 622 else if (IS_ELF(hdr.eh)) 623 fmt = 1; 624 else { 625 printf("Invalid %s\n", "format"); 626 return; 627 } 628 if (fmt == 0) { 629 addr = hdr.ex.a_entry & 0xffffff; 630 p = PTOV(addr); 631 off = PAGE_SIZE; 632 if (xfsread(&dn, &off, p, hdr.ex.a_text)) 633 return; 634 p += roundup2(hdr.ex.a_text, PAGE_SIZE); 635 if (xfsread(&dn, &off, p, hdr.ex.a_data)) 636 return; 637 p += hdr.ex.a_data + roundup2(hdr.ex.a_bss, PAGE_SIZE); 638 bootinfo.bi_symtab = VTOP(p); 639 memcpy(p, &hdr.ex.a_syms, sizeof(hdr.ex.a_syms)); 640 p += sizeof(hdr.ex.a_syms); 641 if (hdr.ex.a_syms) { 642 if (xfsread(&dn, &off, p, hdr.ex.a_syms)) 643 return; 644 p += hdr.ex.a_syms; 645 if (xfsread(&dn, &off, p, sizeof(int))) 646 return; 647 x = *(uint32_t *)p; 648 p += sizeof(int); 649 x -= sizeof(int); 650 if (xfsread(&dn, &off, p, x)) 651 return; 652 p += x; 653 } 654 } else { 655 off = hdr.eh.e_phoff; 656 for (j = i = 0; i < hdr.eh.e_phnum && j < 2; i++) { 657 if (xfsread(&dn, &off, ep + j, sizeof(ep[0]))) 658 return; 659 if (ep[j].p_type == PT_LOAD) 660 j++; 661 } 662 for (i = 0; i < 2; i++) { 663 p = PTOV(ep[i].p_paddr & 0xffffff); 664 off = ep[i].p_offset; 665 if (xfsread(&dn, &off, p, ep[i].p_filesz)) 666 return; 667 } 668 p += roundup2(ep[1].p_memsz, PAGE_SIZE); 669 bootinfo.bi_symtab = VTOP(p); 670 if (hdr.eh.e_shnum == hdr.eh.e_shstrndx + 3) { 671 off = hdr.eh.e_shoff + sizeof(es[0]) * 672 (hdr.eh.e_shstrndx + 1); 673 if (xfsread(&dn, &off, &es, sizeof(es))) 674 return; 675 for (i = 0; i < 2; i++) { 676 memcpy(p, &es[i].sh_size, sizeof(es[i].sh_size)); 677 p += sizeof(es[i].sh_size); 678 off = es[i].sh_offset; 679 if (xfsread(&dn, &off, p, es[i].sh_size)) 680 return; 681 p += es[i].sh_size; 682 } 683 } 684 addr = hdr.eh.e_entry & 0xffffff; 685 } 686 bootinfo.bi_esymtab = VTOP(p); 687 bootinfo.bi_kernelname = VTOP(kname); 688 zfsargs.size = sizeof(zfsargs); 689 zfsargs.pool = zfsmount.spa->spa_guid; 690 zfsargs.root = zfsmount.rootobj; 691 zfsargs.primary_pool = primary_spa->spa_guid; 692 if (primary_vdev != NULL) 693 zfsargs.primary_vdev = primary_vdev->v_guid; 694 else 695 printf("failed to detect primary vdev\n"); 696 __exec((caddr_t)addr, RB_BOOTINFO | (opts & RBX_MASK), 697 bootdev, 698 KARGS_FLAGS_ZFS | KARGS_FLAGS_EXTARG, 699 (uint32_t) spa->spa_guid, 700 (uint32_t) (spa->spa_guid >> 32), 701 VTOP(&bootinfo), 702 zfsargs); 703} 704 705static int 706zfs_mount_ds(char *dsname) 707{ 708 uint64_t newroot; 709 spa_t *newspa; 710 char *q; 711 712 q = strchr(dsname, '/'); 713 if (q) 714 *q++ = '\0'; 715 newspa = spa_find_by_name(dsname); 716 if (newspa == NULL) { 717 printf("\nCan't find ZFS pool %s\n", dsname); 718 return -1; 719 } 720 721 if (zfs_spa_init(newspa)) 722 return -1; 723 724 newroot = 0; 725 if (q) { 726 if (zfs_lookup_dataset(newspa, q, &newroot)) { 727 printf("\nCan't find dataset %s in ZFS pool %s\n", 728 q, newspa->spa_name); 729 return -1; 730 } 731 } 732 if (zfs_mount(newspa, newroot, &zfsmount)) { 733 printf("\nCan't mount ZFS dataset\n"); 734 return -1; 735 } 736 spa = newspa; 737 return (0); 738} 739 740static int 741parse(void) 742{ 743 char *arg = cmd; 744 char *ep, *p, *q; 745 const char *cp; 746 int c, i, j; 747 748 while ((c = *arg++)) { 749 if (c == ' ' || c == '\t' || c == '\n') 750 continue; 751 for (p = arg; *p && *p != '\n' && *p != ' ' && *p != '\t'; p++); 752 ep = p; 753 if (*p) 754 *p++ = 0; 755 if (c == '-') { 756 while ((c = *arg++)) { 757 if (c == 'P') { 758 if (*(uint8_t *)PTOV(0x496) & 0x10) { 759 cp = "yes"; 760 } else { 761 opts |= OPT_SET(RBX_DUAL) | OPT_SET(RBX_SERIAL); 762 cp = "no"; 763 } 764 printf("Keyboard: %s\n", cp); 765 continue; 766 } else if (c == 'S') { 767 j = 0; 768 while ((unsigned int)(i = *arg++ - '0') <= 9) 769 j = j * 10 + i; 770 if (j > 0 && i == -'0') { 771 comspeed = j; 772 break; 773 } 774 /* Fall through to error below ('S' not in optstr[]). */ 775 } 776 for (i = 0; c != optstr[i]; i++) 777 if (i == NOPT - 1) 778 return -1; 779 opts ^= OPT_SET(flags[i]); 780 } 781 ioctrl = OPT_CHECK(RBX_DUAL) ? (IO_SERIAL|IO_KEYBOARD) : 782 OPT_CHECK(RBX_SERIAL) ? IO_SERIAL : IO_KEYBOARD; 783 if (ioctrl & IO_SERIAL) { 784 if (sio_init(115200 / comspeed) != 0) 785 ioctrl &= ~IO_SERIAL; 786 } 787 } if (c == '?') { 788 dnode_phys_t dn; 789 790 if (zfs_lookup(&zfsmount, arg, &dn) == 0) { 791 zap_list(spa, &dn); 792 } 793 return -1; 794 } else { 795 arg--; 796 797 /* 798 * Report pool status if the comment is 'status'. Lets 799 * hope no-one wants to load /status as a kernel. 800 */ 801 if (!strcmp(arg, "status")) { 802 spa_all_status(); 803 return -1; 804 } 805 806 /* 807 * If there is "zfs:" prefix simply ignore it. 808 */ 809 if (strncmp(arg, "zfs:", 4) == 0) 810 arg += 4; 811 812 /* 813 * If there is a colon, switch pools. 814 */ 815 q = strchr(arg, ':'); 816 if (q) { 817 *q++ = '\0'; 818 if (zfs_mount_ds(arg) != 0) 819 return -1; 820 arg = q; 821 } 822 if ((i = ep - arg)) { 823 if ((size_t)i >= sizeof(kname)) 824 return -1; 825 memcpy(kname, arg, i + 1); 826 } 827 } 828 arg = p; 829 } 830 return 0; 831} 832