zfsboot.c revision 292682
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: head/sys/boot/i386/zfsboot/zfsboot.c 292682 2015-12-24 06:22:41Z jhb $"); 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 46#include "libzfs.h" 47 48#define PATH_DOTCONFIG "/boot.config" 49#define PATH_CONFIG "/boot/config" 50#define PATH_BOOT3 "/boot/zfsloader" 51#define PATH_KERNEL "/boot/kernel/kernel" 52 53#define ARGS 0x900 54#define NOPT 14 55#define NDEV 3 56 57#define BIOS_NUMDRIVES 0x475 58#define DRV_HARD 0x80 59#define DRV_MASK 0x7f 60 61#define TYPE_AD 0 62#define TYPE_DA 1 63#define TYPE_MAXHARD TYPE_DA 64#define TYPE_FD 2 65 66extern uint32_t _end; 67 68#ifdef GPT 69static const uuid_t freebsd_zfs_uuid = GPT_ENT_TYPE_FREEBSD_ZFS; 70#endif 71static const char optstr[NOPT] = "DhaCcdgmnpqrsv"; /* Also 'P', 'S' */ 72static const unsigned char flags[NOPT] = { 73 RBX_DUAL, 74 RBX_SERIAL, 75 RBX_ASKNAME, 76 RBX_CDROM, 77 RBX_CONFIG, 78 RBX_KDB, 79 RBX_GDB, 80 RBX_MUTE, 81 RBX_NOINTR, 82 RBX_PAUSE, 83 RBX_QUIET, 84 RBX_DFLTROOT, 85 RBX_SINGLE, 86 RBX_VERBOSE 87}; 88uint32_t opts; 89 90static const char *const dev_nm[NDEV] = {"ad", "da", "fd"}; 91static const unsigned char dev_maj[NDEV] = {30, 4, 2}; 92 93static char cmd[512]; 94static char cmddup[512]; 95static char kname[1024]; 96static char rootname[256]; 97static int comspeed = SIOSPD; 98static struct bootinfo bootinfo; 99static uint32_t bootdev; 100static struct zfs_boot_args zfsargs; 101static struct zfsmount zfsmount; 102 103vm_offset_t high_heap_base; 104uint32_t bios_basemem, bios_extmem, high_heap_size; 105 106static struct bios_smap smap; 107 108/* 109 * The minimum amount of memory to reserve in bios_extmem for the heap. 110 */ 111#define HEAP_MIN (3 * 1024 * 1024) 112 113static char *heap_next; 114static char *heap_end; 115 116/* Buffers that must not span a 64k boundary. */ 117#define READ_BUF_SIZE 8192 118struct dmadat { 119 char rdbuf[READ_BUF_SIZE]; /* for reading large things */ 120 char secbuf[READ_BUF_SIZE]; /* for MBR/disklabel */ 121}; 122static struct dmadat *dmadat; 123 124void exit(int); 125static void load(void); 126static int parse(void); 127static void bios_getmem(void); 128 129static void * 130malloc(size_t n) 131{ 132 char *p = heap_next; 133 if (p + n > heap_end) { 134 printf("malloc failure\n"); 135 for (;;) 136 ; 137 return 0; 138 } 139 heap_next += n; 140 return p; 141} 142 143static char * 144strdup(const char *s) 145{ 146 char *p = malloc(strlen(s) + 1); 147 strcpy(p, s); 148 return p; 149} 150 151#include "zfsimpl.c" 152 153/* 154 * Read from a dnode (which must be from a ZPL filesystem). 155 */ 156static int 157zfs_read(spa_t *spa, const dnode_phys_t *dnode, off_t *offp, void *start, size_t size) 158{ 159 const znode_phys_t *zp = (const znode_phys_t *) dnode->dn_bonus; 160 size_t n; 161 int rc; 162 163 n = size; 164 if (*offp + n > zp->zp_size) 165 n = zp->zp_size - *offp; 166 167 rc = dnode_read(spa, dnode, *offp, start, n); 168 if (rc) 169 return (-1); 170 *offp += n; 171 172 return (n); 173} 174 175/* 176 * Current ZFS pool 177 */ 178static spa_t *spa; 179static spa_t *primary_spa; 180static vdev_t *primary_vdev; 181 182/* 183 * A wrapper for dskread that doesn't have to worry about whether the 184 * buffer pointer crosses a 64k boundary. 185 */ 186static int 187vdev_read(vdev_t *vdev, void *priv, off_t off, void *buf, size_t bytes) 188{ 189 char *p; 190 daddr_t lba; 191 unsigned int nb; 192 struct dsk *dsk = (struct dsk *) priv; 193 194 if ((off & (DEV_BSIZE - 1)) || (bytes & (DEV_BSIZE - 1))) 195 return -1; 196 197 p = buf; 198 lba = off / DEV_BSIZE; 199 lba += dsk->start; 200 while (bytes > 0) { 201 nb = bytes / DEV_BSIZE; 202 if (nb > READ_BUF_SIZE / DEV_BSIZE) 203 nb = READ_BUF_SIZE / DEV_BSIZE; 204 if (drvread(dsk, dmadat->rdbuf, lba, nb)) 205 return -1; 206 memcpy(p, dmadat->rdbuf, nb * DEV_BSIZE); 207 p += nb * DEV_BSIZE; 208 lba += nb; 209 bytes -= nb * DEV_BSIZE; 210 } 211 212 return 0; 213} 214 215static int 216xfsread(const dnode_phys_t *dnode, off_t *offp, void *buf, size_t nbyte) 217{ 218 if ((size_t)zfs_read(spa, dnode, offp, buf, nbyte) != nbyte) { 219 printf("Invalid format\n"); 220 return -1; 221 } 222 return 0; 223} 224 225static void 226bios_getmem(void) 227{ 228 uint64_t size; 229 230 /* Parse system memory map */ 231 v86.ebx = 0; 232 do { 233 v86.ctl = V86_FLAGS; 234 v86.addr = 0x15; /* int 0x15 function 0xe820*/ 235 v86.eax = 0xe820; 236 v86.ecx = sizeof(struct bios_smap); 237 v86.edx = SMAP_SIG; 238 v86.es = VTOPSEG(&smap); 239 v86.edi = VTOPOFF(&smap); 240 v86int(); 241 if (V86_CY(v86.efl) || (v86.eax != SMAP_SIG)) 242 break; 243 /* look for a low-memory segment that's large enough */ 244 if ((smap.type == SMAP_TYPE_MEMORY) && (smap.base == 0) && 245 (smap.length >= (512 * 1024))) 246 bios_basemem = smap.length; 247 /* look for the first segment in 'extended' memory */ 248 if ((smap.type == SMAP_TYPE_MEMORY) && (smap.base == 0x100000)) { 249 bios_extmem = smap.length; 250 } 251 252 /* 253 * Look for the largest segment in 'extended' memory beyond 254 * 1MB but below 4GB. 255 */ 256 if ((smap.type == SMAP_TYPE_MEMORY) && (smap.base > 0x100000) && 257 (smap.base < 0x100000000ull)) { 258 size = smap.length; 259 260 /* 261 * If this segment crosses the 4GB boundary, truncate it. 262 */ 263 if (smap.base + size > 0x100000000ull) 264 size = 0x100000000ull - smap.base; 265 266 if (size > high_heap_size) { 267 high_heap_size = size; 268 high_heap_base = smap.base; 269 } 270 } 271 } while (v86.ebx != 0); 272 273 /* Fall back to the old compatibility function for base memory */ 274 if (bios_basemem == 0) { 275 v86.ctl = 0; 276 v86.addr = 0x12; /* int 0x12 */ 277 v86int(); 278 279 bios_basemem = (v86.eax & 0xffff) * 1024; 280 } 281 282 /* Fall back through several compatibility functions for extended memory */ 283 if (bios_extmem == 0) { 284 v86.ctl = V86_FLAGS; 285 v86.addr = 0x15; /* int 0x15 function 0xe801*/ 286 v86.eax = 0xe801; 287 v86int(); 288 if (!V86_CY(v86.efl)) { 289 bios_extmem = ((v86.ecx & 0xffff) + ((v86.edx & 0xffff) * 64)) * 1024; 290 } 291 } 292 if (bios_extmem == 0) { 293 v86.ctl = 0; 294 v86.addr = 0x15; /* int 0x15 function 0x88*/ 295 v86.eax = 0x8800; 296 v86int(); 297 bios_extmem = (v86.eax & 0xffff) * 1024; 298 } 299 300 /* 301 * If we have extended memory and did not find a suitable heap 302 * region in the SMAP, use the last 3MB of 'extended' memory as a 303 * high heap candidate. 304 */ 305 if (bios_extmem >= HEAP_MIN && high_heap_size < HEAP_MIN) { 306 high_heap_size = HEAP_MIN; 307 high_heap_base = bios_extmem + 0x100000 - HEAP_MIN; 308 } 309} 310 311/* 312 * Try to detect a device supported by the legacy int13 BIOS 313 */ 314static int 315int13probe(int drive) 316{ 317 v86.ctl = V86_FLAGS; 318 v86.addr = 0x13; 319 v86.eax = 0x800; 320 v86.edx = drive; 321 v86int(); 322 323 if (!V86_CY(v86.efl) && /* carry clear */ 324 ((v86.edx & 0xff) != (drive & DRV_MASK))) { /* unit # OK */ 325 if ((v86.ecx & 0x3f) == 0) { /* absurd sector size */ 326 return(0); /* skip device */ 327 } 328 return (1); 329 } 330 return(0); 331} 332 333/* 334 * We call this when we find a ZFS vdev - ZFS consumes the dsk 335 * structure so we must make a new one. 336 */ 337static struct dsk * 338copy_dsk(struct dsk *dsk) 339{ 340 struct dsk *newdsk; 341 342 newdsk = malloc(sizeof(struct dsk)); 343 *newdsk = *dsk; 344 return (newdsk); 345} 346 347static void 348probe_drive(struct dsk *dsk) 349{ 350#ifdef GPT 351 struct gpt_hdr hdr; 352 struct gpt_ent *ent; 353 daddr_t slba, elba; 354 unsigned part, entries_per_sec; 355#endif 356 struct dos_partition *dp; 357 char *sec; 358 unsigned i; 359 360 /* 361 * If we find a vdev on the whole disk, stop here. Otherwise dig 362 * out the partition table and probe each slice/partition 363 * in turn for a vdev. 364 */ 365 if (vdev_probe(vdev_read, dsk, NULL) == 0) 366 return; 367 368 sec = dmadat->secbuf; 369 dsk->start = 0; 370 371#ifdef GPT 372 /* 373 * First check for GPT. 374 */ 375 if (drvread(dsk, sec, 1, 1)) { 376 return; 377 } 378 memcpy(&hdr, sec, sizeof(hdr)); 379 if (memcmp(hdr.hdr_sig, GPT_HDR_SIG, sizeof(hdr.hdr_sig)) != 0 || 380 hdr.hdr_lba_self != 1 || hdr.hdr_revision < 0x00010000 || 381 hdr.hdr_entsz < sizeof(*ent) || DEV_BSIZE % hdr.hdr_entsz != 0) { 382 goto trymbr; 383 } 384 385 /* 386 * Probe all GPT partitions for the presense of ZFS pools. We 387 * return the spa_t for the first we find (if requested). This 388 * will have the effect of booting from the first pool on the 389 * disk. 390 */ 391 entries_per_sec = DEV_BSIZE / hdr.hdr_entsz; 392 slba = hdr.hdr_lba_table; 393 elba = slba + hdr.hdr_entries / entries_per_sec; 394 while (slba < elba) { 395 dsk->start = 0; 396 if (drvread(dsk, sec, slba, 1)) 397 return; 398 for (part = 0; part < entries_per_sec; part++) { 399 ent = (struct gpt_ent *)(sec + part * hdr.hdr_entsz); 400 if (memcmp(&ent->ent_type, &freebsd_zfs_uuid, 401 sizeof(uuid_t)) == 0) { 402 dsk->start = ent->ent_lba_start; 403 if (vdev_probe(vdev_read, dsk, NULL) == 0) { 404 /* 405 * This slice had a vdev. We need a new dsk 406 * structure now since the vdev now owns this one. 407 */ 408 dsk = copy_dsk(dsk); 409 } 410 } 411 } 412 slba++; 413 } 414 return; 415trymbr: 416#endif 417 418 if (drvread(dsk, sec, DOSBBSECTOR, 1)) 419 return; 420 dp = (void *)(sec + DOSPARTOFF); 421 422 for (i = 0; i < NDOSPART; i++) { 423 if (!dp[i].dp_typ) 424 continue; 425 dsk->start = dp[i].dp_start; 426 if (vdev_probe(vdev_read, dsk, NULL) == 0) { 427 /* 428 * This slice had a vdev. We need a new dsk structure now 429 * since the vdev now owns this one. 430 */ 431 dsk = copy_dsk(dsk); 432 } 433 } 434} 435 436int 437main(void) 438{ 439 int autoboot, i; 440 dnode_phys_t dn; 441 off_t off; 442 struct dsk *dsk; 443 444 dmadat = (void *)(roundup2(__base + (int32_t)&_end, 0x10000) - __base); 445 446 bios_getmem(); 447 448 if (high_heap_size > 0) { 449 heap_end = PTOV(high_heap_base + high_heap_size); 450 heap_next = PTOV(high_heap_base); 451 } else { 452 heap_next = (char *) dmadat + sizeof(*dmadat); 453 heap_end = (char *) PTOV(bios_basemem); 454 } 455 456 dsk = malloc(sizeof(struct dsk)); 457 dsk->drive = *(uint8_t *)PTOV(ARGS); 458 dsk->type = dsk->drive & DRV_HARD ? TYPE_AD : TYPE_FD; 459 dsk->unit = dsk->drive & DRV_MASK; 460 dsk->slice = *(uint8_t *)PTOV(ARGS + 1) + 1; 461 dsk->part = 0; 462 dsk->start = 0; 463 dsk->init = 0; 464 465 bootinfo.bi_version = BOOTINFO_VERSION; 466 bootinfo.bi_size = sizeof(bootinfo); 467 bootinfo.bi_basemem = bios_basemem / 1024; 468 bootinfo.bi_extmem = bios_extmem / 1024; 469 bootinfo.bi_memsizes_valid++; 470 bootinfo.bi_bios_dev = dsk->drive; 471 472 bootdev = MAKEBOOTDEV(dev_maj[dsk->type], 473 dsk->slice, dsk->unit, dsk->part), 474 475 /* Process configuration file */ 476 477 autoboot = 1; 478 479 zfs_init(); 480 481 /* 482 * Probe the boot drive first - we will try to boot from whatever 483 * pool we find on that drive. 484 */ 485 probe_drive(dsk); 486 487 /* 488 * Probe the rest of the drives that the bios knows about. This 489 * will find any other available pools and it may fill in missing 490 * vdevs for the boot pool. 491 */ 492#ifndef VIRTUALBOX 493 for (i = 0; i < *(unsigned char *)PTOV(BIOS_NUMDRIVES); i++) 494#else 495 for (i = 0; i < MAXBDDEV; i++) 496#endif 497 { 498 if ((i | DRV_HARD) == *(uint8_t *)PTOV(ARGS)) 499 continue; 500 501 if (!int13probe(i | DRV_HARD)) 502 break; 503 504 dsk = malloc(sizeof(struct dsk)); 505 dsk->drive = i | DRV_HARD; 506 dsk->type = dsk->drive & TYPE_AD; 507 dsk->unit = i; 508 dsk->slice = 0; 509 dsk->part = 0; 510 dsk->start = 0; 511 dsk->init = 0; 512 probe_drive(dsk); 513 } 514 515 /* 516 * The first discovered pool, if any, is the pool. 517 */ 518 spa = spa_get_primary(); 519 if (!spa) { 520 printf("%s: No ZFS pools located, can't boot\n", BOOTPROG); 521 for (;;) 522 ; 523 } 524 525 primary_spa = spa; 526 primary_vdev = spa_get_primary_vdev(spa); 527 528 if (zfs_spa_init(spa) != 0 || zfs_mount(spa, 0, &zfsmount) != 0) { 529 printf("%s: failed to mount default pool %s\n", 530 BOOTPROG, spa->spa_name); 531 autoboot = 0; 532 } else if (zfs_lookup(&zfsmount, PATH_CONFIG, &dn) == 0 || 533 zfs_lookup(&zfsmount, PATH_DOTCONFIG, &dn) == 0) { 534 off = 0; 535 zfs_read(spa, &dn, &off, cmd, sizeof(cmd)); 536 } 537 538 if (*cmd) { 539 /* 540 * Note that parse() is destructive to cmd[] and we also want 541 * to honor RBX_QUIET option that could be present in cmd[]. 542 */ 543 memcpy(cmddup, cmd, sizeof(cmd)); 544 if (parse()) 545 autoboot = 0; 546 if (!OPT_CHECK(RBX_QUIET)) 547 printf("%s: %s\n", PATH_CONFIG, cmddup); 548 /* Do not process this command twice */ 549 *cmd = 0; 550 } 551 552 /* 553 * Try to exec stage 3 boot loader. If interrupted by a keypress, 554 * or in case of failure, try to load a kernel directly instead. 555 */ 556 557 if (autoboot && !*kname) { 558 memcpy(kname, PATH_BOOT3, sizeof(PATH_BOOT3)); 559 if (!keyhit(3)) { 560 load(); 561 memcpy(kname, PATH_KERNEL, sizeof(PATH_KERNEL)); 562 } 563 } 564 565 /* Present the user with the boot2 prompt. */ 566 567 for (;;) { 568 if (!autoboot || !OPT_CHECK(RBX_QUIET)) { 569 printf("\nFreeBSD/x86 boot\n"); 570 if (zfs_rlookup(spa, zfsmount.rootobj, rootname) != 0) 571 printf("Default: %s/<0x%llx>:%s\n" 572 "boot: ", 573 spa->spa_name, zfsmount.rootobj, kname); 574 else if (rootname[0] != '\0') 575 printf("Default: %s/%s:%s\n" 576 "boot: ", 577 spa->spa_name, rootname, kname); 578 else 579 printf("Default: %s:%s\n" 580 "boot: ", 581 spa->spa_name, kname); 582 } 583 if (ioctrl & IO_SERIAL) 584 sio_flush(); 585 if (!autoboot || keyhit(5)) 586 getstr(cmd, sizeof(cmd)); 587 else if (!autoboot || !OPT_CHECK(RBX_QUIET)) 588 putchar('\n'); 589 autoboot = 0; 590 if (parse()) 591 putchar('\a'); 592 else 593 load(); 594 } 595} 596 597/* XXX - Needed for btxld to link the boot2 binary; do not remove. */ 598void 599exit(int x) 600{ 601} 602 603static void 604load(void) 605{ 606 union { 607 struct exec ex; 608 Elf32_Ehdr eh; 609 } hdr; 610 static Elf32_Phdr ep[2]; 611 static Elf32_Shdr es[2]; 612 caddr_t p; 613 dnode_phys_t dn; 614 off_t off; 615 uint32_t addr, x; 616 int fmt, i, j; 617 618 if (zfs_lookup(&zfsmount, kname, &dn)) { 619 printf("\nCan't find %s\n", kname); 620 return; 621 } 622 off = 0; 623 if (xfsread(&dn, &off, &hdr, sizeof(hdr))) 624 return; 625 if (N_GETMAGIC(hdr.ex) == ZMAGIC) 626 fmt = 0; 627 else if (IS_ELF(hdr.eh)) 628 fmt = 1; 629 else { 630 printf("Invalid %s\n", "format"); 631 return; 632 } 633 if (fmt == 0) { 634 addr = hdr.ex.a_entry & 0xffffff; 635 p = PTOV(addr); 636 off = PAGE_SIZE; 637 if (xfsread(&dn, &off, p, hdr.ex.a_text)) 638 return; 639 p += roundup2(hdr.ex.a_text, PAGE_SIZE); 640 if (xfsread(&dn, &off, p, hdr.ex.a_data)) 641 return; 642 p += hdr.ex.a_data + roundup2(hdr.ex.a_bss, PAGE_SIZE); 643 bootinfo.bi_symtab = VTOP(p); 644 memcpy(p, &hdr.ex.a_syms, sizeof(hdr.ex.a_syms)); 645 p += sizeof(hdr.ex.a_syms); 646 if (hdr.ex.a_syms) { 647 if (xfsread(&dn, &off, p, hdr.ex.a_syms)) 648 return; 649 p += hdr.ex.a_syms; 650 if (xfsread(&dn, &off, p, sizeof(int))) 651 return; 652 x = *(uint32_t *)p; 653 p += sizeof(int); 654 x -= sizeof(int); 655 if (xfsread(&dn, &off, p, x)) 656 return; 657 p += x; 658 } 659 } else { 660 off = hdr.eh.e_phoff; 661 for (j = i = 0; i < hdr.eh.e_phnum && j < 2; i++) { 662 if (xfsread(&dn, &off, ep + j, sizeof(ep[0]))) 663 return; 664 if (ep[j].p_type == PT_LOAD) 665 j++; 666 } 667 for (i = 0; i < 2; i++) { 668 p = PTOV(ep[i].p_paddr & 0xffffff); 669 off = ep[i].p_offset; 670 if (xfsread(&dn, &off, p, ep[i].p_filesz)) 671 return; 672 } 673 p += roundup2(ep[1].p_memsz, PAGE_SIZE); 674 bootinfo.bi_symtab = VTOP(p); 675 if (hdr.eh.e_shnum == hdr.eh.e_shstrndx + 3) { 676 off = hdr.eh.e_shoff + sizeof(es[0]) * 677 (hdr.eh.e_shstrndx + 1); 678 if (xfsread(&dn, &off, &es, sizeof(es))) 679 return; 680 for (i = 0; i < 2; i++) { 681 memcpy(p, &es[i].sh_size, sizeof(es[i].sh_size)); 682 p += sizeof(es[i].sh_size); 683 off = es[i].sh_offset; 684 if (xfsread(&dn, &off, p, es[i].sh_size)) 685 return; 686 p += es[i].sh_size; 687 } 688 } 689 addr = hdr.eh.e_entry & 0xffffff; 690 } 691 bootinfo.bi_esymtab = VTOP(p); 692 bootinfo.bi_kernelname = VTOP(kname); 693 zfsargs.size = sizeof(zfsargs); 694 zfsargs.pool = zfsmount.spa->spa_guid; 695 zfsargs.root = zfsmount.rootobj; 696 zfsargs.primary_pool = primary_spa->spa_guid; 697 if (primary_vdev != NULL) 698 zfsargs.primary_vdev = primary_vdev->v_guid; 699 else 700 printf("failed to detect primary vdev\n"); 701 __exec((caddr_t)addr, RB_BOOTINFO | (opts & RBX_MASK), 702 bootdev, 703 KARGS_FLAGS_ZFS | KARGS_FLAGS_EXTARG, 704 (uint32_t) spa->spa_guid, 705 (uint32_t) (spa->spa_guid >> 32), 706 VTOP(&bootinfo), 707 zfsargs); 708} 709 710static int 711zfs_mount_ds(char *dsname) 712{ 713 uint64_t newroot; 714 spa_t *newspa; 715 char *q; 716 717 q = strchr(dsname, '/'); 718 if (q) 719 *q++ = '\0'; 720 newspa = spa_find_by_name(dsname); 721 if (newspa == NULL) { 722 printf("\nCan't find ZFS pool %s\n", dsname); 723 return -1; 724 } 725 726 if (zfs_spa_init(newspa)) 727 return -1; 728 729 newroot = 0; 730 if (q) { 731 if (zfs_lookup_dataset(newspa, q, &newroot)) { 732 printf("\nCan't find dataset %s in ZFS pool %s\n", 733 q, newspa->spa_name); 734 return -1; 735 } 736 } 737 if (zfs_mount(newspa, newroot, &zfsmount)) { 738 printf("\nCan't mount ZFS dataset\n"); 739 return -1; 740 } 741 spa = newspa; 742 return (0); 743} 744 745static int 746parse(void) 747{ 748 char *arg = cmd; 749 char *ep, *p, *q; 750 const char *cp; 751 int c, i, j; 752 753 while ((c = *arg++)) { 754 if (c == ' ' || c == '\t' || c == '\n') 755 continue; 756 for (p = arg; *p && *p != '\n' && *p != ' ' && *p != '\t'; p++); 757 ep = p; 758 if (*p) 759 *p++ = 0; 760 if (c == '-') { 761 while ((c = *arg++)) { 762 if (c == 'P') { 763 if (*(uint8_t *)PTOV(0x496) & 0x10) { 764 cp = "yes"; 765 } else { 766 opts |= OPT_SET(RBX_DUAL) | OPT_SET(RBX_SERIAL); 767 cp = "no"; 768 } 769 printf("Keyboard: %s\n", cp); 770 continue; 771 } else if (c == 'S') { 772 j = 0; 773 while ((unsigned int)(i = *arg++ - '0') <= 9) 774 j = j * 10 + i; 775 if (j > 0 && i == -'0') { 776 comspeed = j; 777 break; 778 } 779 /* Fall through to error below ('S' not in optstr[]). */ 780 } 781 for (i = 0; c != optstr[i]; i++) 782 if (i == NOPT - 1) 783 return -1; 784 opts ^= OPT_SET(flags[i]); 785 } 786 ioctrl = OPT_CHECK(RBX_DUAL) ? (IO_SERIAL|IO_KEYBOARD) : 787 OPT_CHECK(RBX_SERIAL) ? IO_SERIAL : IO_KEYBOARD; 788 if (ioctrl & IO_SERIAL) { 789 if (sio_init(115200 / comspeed) != 0) 790 ioctrl &= ~IO_SERIAL; 791 } 792 } if (c == '?') { 793 dnode_phys_t dn; 794 795 if (zfs_lookup(&zfsmount, arg, &dn) == 0) { 796 zap_list(spa, &dn); 797 } 798 return -1; 799 } else { 800 arg--; 801 802 /* 803 * Report pool status if the comment is 'status'. Lets 804 * hope no-one wants to load /status as a kernel. 805 */ 806 if (!strcmp(arg, "status")) { 807 spa_all_status(); 808 return -1; 809 } 810 811 /* 812 * If there is "zfs:" prefix simply ignore it. 813 */ 814 if (strncmp(arg, "zfs:", 4) == 0) 815 arg += 4; 816 817 /* 818 * If there is a colon, switch pools. 819 */ 820 q = strchr(arg, ':'); 821 if (q) { 822 *q++ = '\0'; 823 if (zfs_mount_ds(arg) != 0) 824 return -1; 825 arg = q; 826 } 827 if ((i = ep - arg)) { 828 if ((size_t)i >= sizeof(kname)) 829 return -1; 830 memcpy(kname, arg, i + 1); 831 } 832 } 833 arg = p; 834 } 835 return 0; 836} 837