zfsboot.c revision 241288
1185029Spjd/*- 2185029Spjd * Copyright (c) 1998 Robert Nordier 3185029Spjd * All rights reserved. 4185029Spjd * 5185029Spjd * Redistribution and use in source and binary forms are freely 6185029Spjd * permitted provided that the above copyright notice and this 7185029Spjd * paragraph and the following disclaimer are duplicated in all 8185029Spjd * such forms. 9185029Spjd * 10185029Spjd * This software is provided "AS IS" and without any express or 11185029Spjd * implied warranties, including, without limitation, the implied 12185029Spjd * warranties of merchantability and fitness for a particular 13185029Spjd * purpose. 14185029Spjd */ 15185029Spjd 16185029Spjd#include <sys/cdefs.h> 17185029Spjd__FBSDID("$FreeBSD: head/sys/boot/i386/zfsboot/zfsboot.c 241288 2012-10-06 19:38:33Z avg $"); 18185029Spjd 19185029Spjd#include <sys/param.h> 20185029Spjd#include <sys/errno.h> 21185029Spjd#include <sys/diskmbr.h> 22185096Sdfr#ifdef GPT 23185096Sdfr#include <sys/gpt.h> 24185096Sdfr#endif 25185029Spjd#include <sys/reboot.h> 26185029Spjd#include <sys/queue.h> 27185029Spjd 28185029Spjd#include <machine/bootinfo.h> 29185029Spjd#include <machine/elf.h> 30200309Sjhb#include <machine/pc/bios.h> 31185029Spjd 32185029Spjd#include <stdarg.h> 33185029Spjd#include <stddef.h> 34185029Spjd 35185029Spjd#include <a.out.h> 36185029Spjd 37185029Spjd#include <btxv86.h> 38185029Spjd 39185029Spjd#include "lib.h" 40213136Spjd#include "rbx.h" 41213136Spjd#include "drv.h" 42213136Spjd#include "util.h" 43213136Spjd#include "cons.h" 44235154Savg#include "bootargs.h" 45185029Spjd 46235329Savg#include "libzfs.h" 47235329Savg 48226506Sdes#define PATH_DOTCONFIG "/boot.config" 49226506Sdes#define PATH_CONFIG "/boot/config" 50199714Srnoland#define PATH_BOOT3 "/boot/zfsloader" 51185029Spjd#define PATH_KERNEL "/boot/kernel/kernel" 52185029Spjd 53185029Spjd#define ARGS 0x900 54185029Spjd#define NOPT 14 55185029Spjd#define NDEV 3 56185029Spjd 57212805Spjd#define BIOS_NUMDRIVES 0x475 58185029Spjd#define DRV_HARD 0x80 59185029Spjd#define DRV_MASK 0x7f 60185029Spjd 61185029Spjd#define TYPE_AD 0 62185029Spjd#define TYPE_DA 1 63185029Spjd#define TYPE_MAXHARD TYPE_DA 64185029Spjd#define TYPE_FD 2 65185029Spjd 66185029Spjdextern uint32_t _end; 67185029Spjd 68185096Sdfr#ifdef GPT 69185096Sdfrstatic const uuid_t freebsd_zfs_uuid = GPT_ENT_TYPE_FREEBSD_ZFS; 70185096Sdfr#endif 71185029Spjdstatic const char optstr[NOPT] = "DhaCcdgmnpqrsv"; /* Also 'P', 'S' */ 72185029Spjdstatic const unsigned char flags[NOPT] = { 73185029Spjd RBX_DUAL, 74185029Spjd RBX_SERIAL, 75185029Spjd RBX_ASKNAME, 76185029Spjd RBX_CDROM, 77185029Spjd RBX_CONFIG, 78185029Spjd RBX_KDB, 79185029Spjd RBX_GDB, 80185029Spjd RBX_MUTE, 81185029Spjd RBX_NOINTR, 82185029Spjd RBX_PAUSE, 83185029Spjd RBX_QUIET, 84185029Spjd RBX_DFLTROOT, 85185029Spjd RBX_SINGLE, 86185029Spjd RBX_VERBOSE 87185029Spjd}; 88213136Spjduint32_t opts; 89185029Spjd 90185029Spjdstatic const char *const dev_nm[NDEV] = {"ad", "da", "fd"}; 91185029Spjdstatic const unsigned char dev_maj[NDEV] = {30, 4, 2}; 92185029Spjd 93185029Spjdstatic char cmd[512]; 94234339Savgstatic char cmddup[512]; 95185029Spjdstatic char kname[1024]; 96235329Savgstatic char rootname[256]; 97185029Spjdstatic int comspeed = SIOSPD; 98185029Spjdstatic struct bootinfo bootinfo; 99185029Spjdstatic uint32_t bootdev; 100235329Savgstatic struct zfs_boot_args zfsargs; 101235329Savgstatic struct zfsmount zfsmount; 102185029Spjd 103200309Sjhbvm_offset_t high_heap_base; 104200309Sjhbuint32_t bios_basemem, bios_extmem, high_heap_size; 105200309Sjhb 106200309Sjhbstatic struct bios_smap smap; 107200309Sjhb 108200309Sjhb/* 109200309Sjhb * The minimum amount of memory to reserve in bios_extmem for the heap. 110200309Sjhb */ 111200309Sjhb#define HEAP_MIN (3 * 1024 * 1024) 112200309Sjhb 113200309Sjhbstatic char *heap_next; 114200309Sjhbstatic char *heap_end; 115200309Sjhb 116185029Spjd/* Buffers that must not span a 64k boundary. */ 117185029Spjd#define READ_BUF_SIZE 8192 118185029Spjdstruct dmadat { 119185029Spjd char rdbuf[READ_BUF_SIZE]; /* for reading large things */ 120185029Spjd char secbuf[READ_BUF_SIZE]; /* for MBR/disklabel */ 121185029Spjd}; 122185029Spjdstatic struct dmadat *dmadat; 123185029Spjd 124185029Spjdvoid exit(int); 125185029Spjdstatic void load(void); 126185029Spjdstatic int parse(void); 127200309Sjhbstatic void bios_getmem(void); 128185029Spjd 129185029Spjdstatic void * 130185029Spjdmalloc(size_t n) 131185029Spjd{ 132185029Spjd char *p = heap_next; 133185029Spjd if (p + n > heap_end) { 134185029Spjd printf("malloc failure\n"); 135185029Spjd for (;;) 136185029Spjd ; 137185029Spjd return 0; 138185029Spjd } 139185029Spjd heap_next += n; 140185029Spjd return p; 141185029Spjd} 142185029Spjd 143185029Spjdstatic char * 144185029Spjdstrdup(const char *s) 145185029Spjd{ 146185029Spjd char *p = malloc(strlen(s) + 1); 147185029Spjd strcpy(p, s); 148185029Spjd return p; 149185029Spjd} 150185029Spjd 151185029Spjd#include "zfsimpl.c" 152185029Spjd 153185029Spjd/* 154185029Spjd * Read from a dnode (which must be from a ZPL filesystem). 155185029Spjd */ 156185029Spjdstatic int 157185029Spjdzfs_read(spa_t *spa, const dnode_phys_t *dnode, off_t *offp, void *start, size_t size) 158185029Spjd{ 159185029Spjd const znode_phys_t *zp = (const znode_phys_t *) dnode->dn_bonus; 160185029Spjd size_t n; 161185029Spjd int rc; 162185029Spjd 163185029Spjd n = size; 164185029Spjd if (*offp + n > zp->zp_size) 165185029Spjd n = zp->zp_size - *offp; 166185029Spjd 167185029Spjd rc = dnode_read(spa, dnode, *offp, start, n); 168185029Spjd if (rc) 169185029Spjd return (-1); 170185029Spjd *offp += n; 171185029Spjd 172185029Spjd return (n); 173185029Spjd} 174185029Spjd 175185029Spjd/* 176185029Spjd * Current ZFS pool 177185029Spjd */ 178235329Savgstatic spa_t *spa; 179185029Spjd 180185029Spjd/* 181185029Spjd * A wrapper for dskread that doesn't have to worry about whether the 182185029Spjd * buffer pointer crosses a 64k boundary. 183185029Spjd */ 184185029Spjdstatic int 185185029Spjdvdev_read(vdev_t *vdev, void *priv, off_t off, void *buf, size_t bytes) 186185029Spjd{ 187185029Spjd char *p; 188199579Sjhb daddr_t lba; 189199579Sjhb unsigned int nb; 190185029Spjd struct dsk *dsk = (struct dsk *) priv; 191185029Spjd 192185029Spjd if ((off & (DEV_BSIZE - 1)) || (bytes & (DEV_BSIZE - 1))) 193185029Spjd return -1; 194185029Spjd 195185029Spjd p = buf; 196185029Spjd lba = off / DEV_BSIZE; 197213136Spjd lba += dsk->start; 198185029Spjd while (bytes > 0) { 199185029Spjd nb = bytes / DEV_BSIZE; 200185029Spjd if (nb > READ_BUF_SIZE / DEV_BSIZE) 201185029Spjd nb = READ_BUF_SIZE / DEV_BSIZE; 202185029Spjd if (drvread(dsk, dmadat->rdbuf, lba, nb)) 203185029Spjd return -1; 204185029Spjd memcpy(p, dmadat->rdbuf, nb * DEV_BSIZE); 205185029Spjd p += nb * DEV_BSIZE; 206185029Spjd lba += nb; 207185029Spjd bytes -= nb * DEV_BSIZE; 208185029Spjd } 209185029Spjd 210185029Spjd return 0; 211185029Spjd} 212185029Spjd 213185029Spjdstatic int 214185029Spjdxfsread(const dnode_phys_t *dnode, off_t *offp, void *buf, size_t nbyte) 215185029Spjd{ 216185029Spjd if ((size_t)zfs_read(spa, dnode, offp, buf, nbyte) != nbyte) { 217235329Savg printf("Invalid format\n"); 218185029Spjd return -1; 219185029Spjd } 220185029Spjd return 0; 221185029Spjd} 222185029Spjd 223200309Sjhbstatic void 224200309Sjhbbios_getmem(void) 225185029Spjd{ 226200309Sjhb uint64_t size; 227185029Spjd 228200309Sjhb /* Parse system memory map */ 229200309Sjhb v86.ebx = 0; 230200309Sjhb do { 231200309Sjhb v86.ctl = V86_FLAGS; 232200309Sjhb v86.addr = 0x15; /* int 0x15 function 0xe820*/ 233200309Sjhb v86.eax = 0xe820; 234200309Sjhb v86.ecx = sizeof(struct bios_smap); 235200309Sjhb v86.edx = SMAP_SIG; 236200309Sjhb v86.es = VTOPSEG(&smap); 237200309Sjhb v86.edi = VTOPOFF(&smap); 238200309Sjhb v86int(); 239200309Sjhb if ((v86.efl & 1) || (v86.eax != SMAP_SIG)) 240200309Sjhb break; 241200309Sjhb /* look for a low-memory segment that's large enough */ 242200309Sjhb if ((smap.type == SMAP_TYPE_MEMORY) && (smap.base == 0) && 243200309Sjhb (smap.length >= (512 * 1024))) 244200309Sjhb bios_basemem = smap.length; 245200309Sjhb /* look for the first segment in 'extended' memory */ 246200309Sjhb if ((smap.type == SMAP_TYPE_MEMORY) && (smap.base == 0x100000)) { 247200309Sjhb bios_extmem = smap.length; 248200309Sjhb } 249200309Sjhb 250200309Sjhb /* 251200309Sjhb * Look for the largest segment in 'extended' memory beyond 252200309Sjhb * 1MB but below 4GB. 253200309Sjhb */ 254200309Sjhb if ((smap.type == SMAP_TYPE_MEMORY) && (smap.base > 0x100000) && 255200309Sjhb (smap.base < 0x100000000ull)) { 256200309Sjhb size = smap.length; 257200309Sjhb 258200309Sjhb /* 259200309Sjhb * If this segment crosses the 4GB boundary, truncate it. 260200309Sjhb */ 261200309Sjhb if (smap.base + size > 0x100000000ull) 262200309Sjhb size = 0x100000000ull - smap.base; 263200309Sjhb 264200309Sjhb if (size > high_heap_size) { 265200309Sjhb high_heap_size = size; 266200309Sjhb high_heap_base = smap.base; 267200309Sjhb } 268200309Sjhb } 269200309Sjhb } while (v86.ebx != 0); 270200309Sjhb 271200309Sjhb /* Fall back to the old compatibility function for base memory */ 272200309Sjhb if (bios_basemem == 0) { 273200309Sjhb v86.ctl = 0; 274200309Sjhb v86.addr = 0x12; /* int 0x12 */ 275200309Sjhb v86int(); 276200309Sjhb 277200309Sjhb bios_basemem = (v86.eax & 0xffff) * 1024; 278200309Sjhb } 279200309Sjhb 280200309Sjhb /* Fall back through several compatibility functions for extended memory */ 281200309Sjhb if (bios_extmem == 0) { 282200309Sjhb v86.ctl = V86_FLAGS; 283200309Sjhb v86.addr = 0x15; /* int 0x15 function 0xe801*/ 284200309Sjhb v86.eax = 0xe801; 285200309Sjhb v86int(); 286200309Sjhb if (!(v86.efl & 1)) { 287200309Sjhb bios_extmem = ((v86.ecx & 0xffff) + ((v86.edx & 0xffff) * 64)) * 1024; 288200309Sjhb } 289200309Sjhb } 290200309Sjhb if (bios_extmem == 0) { 291200309Sjhb v86.ctl = 0; 292200309Sjhb v86.addr = 0x15; /* int 0x15 function 0x88*/ 293200309Sjhb v86.eax = 0x8800; 294200309Sjhb v86int(); 295200309Sjhb bios_extmem = (v86.eax & 0xffff) * 1024; 296200309Sjhb } 297200309Sjhb 298200309Sjhb /* 299200309Sjhb * If we have extended memory and did not find a suitable heap 300200309Sjhb * region in the SMAP, use the last 3MB of 'extended' memory as a 301200309Sjhb * high heap candidate. 302200309Sjhb */ 303200309Sjhb if (bios_extmem >= HEAP_MIN && high_heap_size < HEAP_MIN) { 304200309Sjhb high_heap_size = HEAP_MIN; 305200309Sjhb high_heap_base = bios_extmem + 0x100000 - HEAP_MIN; 306200309Sjhb } 307200309Sjhb} 308200309Sjhb 309185029Spjd/* 310185029Spjd * Try to detect a device supported by the legacy int13 BIOS 311185029Spjd */ 312185029Spjdstatic int 313185029Spjdint13probe(int drive) 314185029Spjd{ 315185029Spjd v86.ctl = V86_FLAGS; 316185029Spjd v86.addr = 0x13; 317185029Spjd v86.eax = 0x800; 318185029Spjd v86.edx = drive; 319185029Spjd v86int(); 320185029Spjd 321185029Spjd if (!(v86.efl & 0x1) && /* carry clear */ 322185029Spjd ((v86.edx & 0xff) != (drive & DRV_MASK))) { /* unit # OK */ 323185029Spjd if ((v86.ecx & 0x3f) == 0) { /* absurd sector size */ 324185029Spjd return(0); /* skip device */ 325185029Spjd } 326185029Spjd return (1); 327185029Spjd } 328185029Spjd return(0); 329185029Spjd} 330185029Spjd 331192194Sdfr/* 332192194Sdfr * We call this when we find a ZFS vdev - ZFS consumes the dsk 333192194Sdfr * structure so we must make a new one. 334192194Sdfr */ 335192194Sdfrstatic struct dsk * 336192194Sdfrcopy_dsk(struct dsk *dsk) 337192194Sdfr{ 338192194Sdfr struct dsk *newdsk; 339192194Sdfr 340192194Sdfr newdsk = malloc(sizeof(struct dsk)); 341192194Sdfr *newdsk = *dsk; 342192194Sdfr return (newdsk); 343192194Sdfr} 344192194Sdfr 345185029Spjdstatic void 346185029Spjdprobe_drive(struct dsk *dsk, spa_t **spap) 347185029Spjd{ 348185096Sdfr#ifdef GPT 349185096Sdfr struct gpt_hdr hdr; 350185096Sdfr struct gpt_ent *ent; 351185096Sdfr daddr_t slba, elba; 352185096Sdfr unsigned part, entries_per_sec; 353185096Sdfr#endif 354185029Spjd struct dos_partition *dp; 355185029Spjd char *sec; 356185029Spjd unsigned i; 357185029Spjd 358185029Spjd /* 359185029Spjd * If we find a vdev on the whole disk, stop here. Otherwise dig 360185029Spjd * out the MBR and probe each slice in turn for a vdev. 361185029Spjd */ 362185029Spjd if (vdev_probe(vdev_read, dsk, spap) == 0) 363185029Spjd return; 364185029Spjd 365185029Spjd sec = dmadat->secbuf; 366185029Spjd dsk->start = 0; 367185096Sdfr 368185096Sdfr#ifdef GPT 369185096Sdfr /* 370185096Sdfr * First check for GPT. 371185096Sdfr */ 372185096Sdfr if (drvread(dsk, sec, 1, 1)) { 373185096Sdfr return; 374185096Sdfr } 375185096Sdfr memcpy(&hdr, sec, sizeof(hdr)); 376185096Sdfr if (memcmp(hdr.hdr_sig, GPT_HDR_SIG, sizeof(hdr.hdr_sig)) != 0 || 377185096Sdfr hdr.hdr_lba_self != 1 || hdr.hdr_revision < 0x00010000 || 378185096Sdfr hdr.hdr_entsz < sizeof(*ent) || DEV_BSIZE % hdr.hdr_entsz != 0) { 379185096Sdfr goto trymbr; 380185096Sdfr } 381185096Sdfr 382185096Sdfr /* 383185096Sdfr * Probe all GPT partitions for the presense of ZFS pools. We 384185096Sdfr * return the spa_t for the first we find (if requested). This 385185096Sdfr * will have the effect of booting from the first pool on the 386185096Sdfr * disk. 387185096Sdfr */ 388185096Sdfr entries_per_sec = DEV_BSIZE / hdr.hdr_entsz; 389185096Sdfr slba = hdr.hdr_lba_table; 390185096Sdfr elba = slba + hdr.hdr_entries / entries_per_sec; 391185096Sdfr while (slba < elba) { 392198420Srnoland dsk->start = 0; 393185096Sdfr if (drvread(dsk, sec, slba, 1)) 394185096Sdfr return; 395185096Sdfr for (part = 0; part < entries_per_sec; part++) { 396185096Sdfr ent = (struct gpt_ent *)(sec + part * hdr.hdr_entsz); 397185096Sdfr if (memcmp(&ent->ent_type, &freebsd_zfs_uuid, 398185096Sdfr sizeof(uuid_t)) == 0) { 399185096Sdfr dsk->start = ent->ent_lba_start; 400185096Sdfr if (vdev_probe(vdev_read, dsk, spap) == 0) { 401185096Sdfr /* 402185096Sdfr * We record the first pool we find (we will try 403192194Sdfr * to boot from that one). 404185096Sdfr */ 405213136Spjd spap = NULL; 406185096Sdfr 407185096Sdfr /* 408185096Sdfr * This slice had a vdev. We need a new dsk 409185096Sdfr * structure now since the vdev now owns this one. 410185096Sdfr */ 411192194Sdfr dsk = copy_dsk(dsk); 412185096Sdfr } 413185096Sdfr } 414185096Sdfr } 415185096Sdfr slba++; 416185096Sdfr } 417185096Sdfr return; 418185096Sdfrtrymbr: 419185096Sdfr#endif 420185096Sdfr 421185029Spjd if (drvread(dsk, sec, DOSBBSECTOR, 1)) 422185029Spjd return; 423185029Spjd dp = (void *)(sec + DOSPARTOFF); 424185029Spjd 425185029Spjd for (i = 0; i < NDOSPART; i++) { 426185029Spjd if (!dp[i].dp_typ) 427185029Spjd continue; 428185029Spjd dsk->start = dp[i].dp_start; 429185029Spjd if (vdev_probe(vdev_read, dsk, spap) == 0) { 430185029Spjd /* 431185029Spjd * We record the first pool we find (we will try to boot 432185029Spjd * from that one. 433185029Spjd */ 434185029Spjd spap = 0; 435185029Spjd 436185029Spjd /* 437185029Spjd * This slice had a vdev. We need a new dsk structure now 438185096Sdfr * since the vdev now owns this one. 439185029Spjd */ 440192194Sdfr dsk = copy_dsk(dsk); 441185029Spjd } 442185029Spjd } 443185029Spjd} 444185029Spjd 445185029Spjdint 446185029Spjdmain(void) 447185029Spjd{ 448185029Spjd int autoboot, i; 449185029Spjd dnode_phys_t dn; 450185029Spjd off_t off; 451185029Spjd struct dsk *dsk; 452185029Spjd 453208388Sjhb dmadat = (void *)(roundup2(__base + (int32_t)&_end, 0x10000) - __base); 454208388Sjhb 455200309Sjhb bios_getmem(); 456200309Sjhb 457200309Sjhb if (high_heap_size > 0) { 458200309Sjhb heap_end = PTOV(high_heap_base + high_heap_size); 459200309Sjhb heap_next = PTOV(high_heap_base); 460200309Sjhb } else { 461200309Sjhb heap_next = (char *) dmadat + sizeof(*dmadat); 462200309Sjhb heap_end = (char *) PTOV(bios_basemem); 463200309Sjhb } 464200309Sjhb 465185029Spjd dsk = malloc(sizeof(struct dsk)); 466185029Spjd dsk->drive = *(uint8_t *)PTOV(ARGS); 467185029Spjd dsk->type = dsk->drive & DRV_HARD ? TYPE_AD : TYPE_FD; 468185029Spjd dsk->unit = dsk->drive & DRV_MASK; 469185029Spjd dsk->slice = *(uint8_t *)PTOV(ARGS + 1) + 1; 470185029Spjd dsk->part = 0; 471185029Spjd dsk->start = 0; 472185029Spjd dsk->init = 0; 473185029Spjd 474185029Spjd bootinfo.bi_version = BOOTINFO_VERSION; 475185029Spjd bootinfo.bi_size = sizeof(bootinfo); 476200309Sjhb bootinfo.bi_basemem = bios_basemem / 1024; 477200309Sjhb bootinfo.bi_extmem = bios_extmem / 1024; 478185029Spjd bootinfo.bi_memsizes_valid++; 479185029Spjd bootinfo.bi_bios_dev = dsk->drive; 480185029Spjd 481185029Spjd bootdev = MAKEBOOTDEV(dev_maj[dsk->type], 482185029Spjd dsk->slice, dsk->unit, dsk->part), 483185029Spjd 484185029Spjd /* Process configuration file */ 485185029Spjd 486185029Spjd autoboot = 1; 487185029Spjd 488185029Spjd zfs_init(); 489185029Spjd 490185029Spjd /* 491185029Spjd * Probe the boot drive first - we will try to boot from whatever 492185029Spjd * pool we find on that drive. 493185029Spjd */ 494185029Spjd probe_drive(dsk, &spa); 495185029Spjd 496185029Spjd /* 497185029Spjd * Probe the rest of the drives that the bios knows about. This 498185029Spjd * will find any other available pools and it may fill in missing 499185029Spjd * vdevs for the boot pool. 500185029Spjd */ 501212805Spjd#ifndef VIRTUALBOX 502212805Spjd for (i = 0; i < *(unsigned char *)PTOV(BIOS_NUMDRIVES); i++) 503212805Spjd#else 504212805Spjd for (i = 0; i < MAXBDDEV; i++) 505212805Spjd#endif 506212805Spjd { 507185029Spjd if ((i | DRV_HARD) == *(uint8_t *)PTOV(ARGS)) 508185029Spjd continue; 509185029Spjd 510192194Sdfr if (!int13probe(i | DRV_HARD)) 511192194Sdfr break; 512192194Sdfr 513185029Spjd dsk = malloc(sizeof(struct dsk)); 514185029Spjd dsk->drive = i | DRV_HARD; 515185029Spjd dsk->type = dsk->drive & TYPE_AD; 516185029Spjd dsk->unit = i; 517185029Spjd dsk->slice = 0; 518185029Spjd dsk->part = 0; 519185029Spjd dsk->start = 0; 520185029Spjd dsk->init = 0; 521213136Spjd probe_drive(dsk, NULL); 522185029Spjd } 523185029Spjd 524185029Spjd /* 525185029Spjd * If we didn't find a pool on the boot drive, default to the 526185029Spjd * first pool we found, if any. 527185029Spjd */ 528185029Spjd if (!spa) { 529185029Spjd spa = STAILQ_FIRST(&zfs_pools); 530185029Spjd if (!spa) { 531213136Spjd printf("%s: No ZFS pools located, can't boot\n", BOOTPROG); 532185029Spjd for (;;) 533185029Spjd ; 534185029Spjd } 535185029Spjd } 536185029Spjd 537235329Savg if (zfs_spa_init(spa) != 0 || zfs_mount(spa, 0, &zfsmount) != 0) { 538235329Savg printf("%s: failed to mount default pool %s\n", 539235329Savg BOOTPROG, spa->spa_name); 540235329Savg autoboot = 0; 541235329Savg } else if (zfs_lookup(&zfsmount, PATH_CONFIG, &dn) == 0 || 542235329Savg zfs_lookup(&zfsmount, PATH_DOTCONFIG, &dn) == 0) { 543185029Spjd off = 0; 544198079Sjhb zfs_read(spa, &dn, &off, cmd, sizeof(cmd)); 545185029Spjd } 546185029Spjd 547185029Spjd if (*cmd) { 548234339Savg /* 549234339Savg * Note that parse() is destructive to cmd[] and we also want 550234339Savg * to honor RBX_QUIET option that could be present in cmd[]. 551234339Savg */ 552234339Savg memcpy(cmddup, cmd, sizeof(cmd)); 553185029Spjd if (parse()) 554185029Spjd autoboot = 0; 555234339Savg if (!OPT_CHECK(RBX_QUIET)) 556241288Savg printf("%s: %s\n", PATH_CONFIG, cmddup); 557185029Spjd /* Do not process this command twice */ 558185029Spjd *cmd = 0; 559185029Spjd } 560185029Spjd 561185029Spjd /* 562185029Spjd * Try to exec stage 3 boot loader. If interrupted by a keypress, 563185029Spjd * or in case of failure, try to load a kernel directly instead. 564185029Spjd */ 565185029Spjd 566185029Spjd if (autoboot && !*kname) { 567185029Spjd memcpy(kname, PATH_BOOT3, sizeof(PATH_BOOT3)); 568213136Spjd if (!keyhit(3)) { 569185029Spjd load(); 570185029Spjd memcpy(kname, PATH_KERNEL, sizeof(PATH_KERNEL)); 571185029Spjd } 572185029Spjd } 573185029Spjd 574185029Spjd /* Present the user with the boot2 prompt. */ 575185029Spjd 576185029Spjd for (;;) { 577235329Savg if (!autoboot || !OPT_CHECK(RBX_QUIET)) { 578235329Savg printf("\nFreeBSD/x86 boot\n"); 579235329Savg if (zfs_rlookup(spa, zfsmount.rootobj, rootname) != 0) 580241288Savg printf("Default: %s/<0x%llx>:%s\n" 581235329Savg "boot: ", 582235329Savg spa->spa_name, zfsmount.rootobj, kname); 583241288Savg else if (rootname[0] != '\0') 584241288Savg printf("Default: %s/%s:%s\n" 585241288Savg "boot: ", 586241288Savg spa->spa_name, rootname, kname); 587235329Savg else 588241288Savg printf("Default: %s:%s\n" 589235329Savg "boot: ", 590241288Savg spa->spa_name, kname); 591235329Savg } 592185029Spjd if (ioctrl & IO_SERIAL) 593185029Spjd sio_flush(); 594213136Spjd if (!autoboot || keyhit(5)) 595213136Spjd getstr(cmd, sizeof(cmd)); 596185029Spjd else if (!autoboot || !OPT_CHECK(RBX_QUIET)) 597185029Spjd putchar('\n'); 598185029Spjd autoboot = 0; 599185029Spjd if (parse()) 600185029Spjd putchar('\a'); 601185029Spjd else 602185029Spjd load(); 603185029Spjd } 604185029Spjd} 605185029Spjd 606185029Spjd/* XXX - Needed for btxld to link the boot2 binary; do not remove. */ 607185029Spjdvoid 608185029Spjdexit(int x) 609185029Spjd{ 610185029Spjd} 611185029Spjd 612185029Spjdstatic void 613185029Spjdload(void) 614185029Spjd{ 615185029Spjd union { 616185029Spjd struct exec ex; 617185029Spjd Elf32_Ehdr eh; 618185029Spjd } hdr; 619185029Spjd static Elf32_Phdr ep[2]; 620185029Spjd static Elf32_Shdr es[2]; 621185029Spjd caddr_t p; 622185029Spjd dnode_phys_t dn; 623185029Spjd off_t off; 624185029Spjd uint32_t addr, x; 625185029Spjd int fmt, i, j; 626185029Spjd 627235329Savg if (zfs_lookup(&zfsmount, kname, &dn)) { 628235329Savg printf("\nCan't find %s\n", kname); 629185029Spjd return; 630185029Spjd } 631185029Spjd off = 0; 632185029Spjd if (xfsread(&dn, &off, &hdr, sizeof(hdr))) 633185029Spjd return; 634185029Spjd if (N_GETMAGIC(hdr.ex) == ZMAGIC) 635185029Spjd fmt = 0; 636185029Spjd else if (IS_ELF(hdr.eh)) 637185029Spjd fmt = 1; 638185029Spjd else { 639185029Spjd printf("Invalid %s\n", "format"); 640185029Spjd return; 641185029Spjd } 642185029Spjd if (fmt == 0) { 643185029Spjd addr = hdr.ex.a_entry & 0xffffff; 644185029Spjd p = PTOV(addr); 645185029Spjd off = PAGE_SIZE; 646185029Spjd if (xfsread(&dn, &off, p, hdr.ex.a_text)) 647185029Spjd return; 648185029Spjd p += roundup2(hdr.ex.a_text, PAGE_SIZE); 649185029Spjd if (xfsread(&dn, &off, p, hdr.ex.a_data)) 650185029Spjd return; 651185029Spjd p += hdr.ex.a_data + roundup2(hdr.ex.a_bss, PAGE_SIZE); 652185029Spjd bootinfo.bi_symtab = VTOP(p); 653185029Spjd memcpy(p, &hdr.ex.a_syms, sizeof(hdr.ex.a_syms)); 654185029Spjd p += sizeof(hdr.ex.a_syms); 655185029Spjd if (hdr.ex.a_syms) { 656185029Spjd if (xfsread(&dn, &off, p, hdr.ex.a_syms)) 657185029Spjd return; 658185029Spjd p += hdr.ex.a_syms; 659185029Spjd if (xfsread(&dn, &off, p, sizeof(int))) 660185029Spjd return; 661185029Spjd x = *(uint32_t *)p; 662185029Spjd p += sizeof(int); 663185029Spjd x -= sizeof(int); 664185029Spjd if (xfsread(&dn, &off, p, x)) 665185029Spjd return; 666185029Spjd p += x; 667185029Spjd } 668185029Spjd } else { 669185029Spjd off = hdr.eh.e_phoff; 670185029Spjd for (j = i = 0; i < hdr.eh.e_phnum && j < 2; i++) { 671185029Spjd if (xfsread(&dn, &off, ep + j, sizeof(ep[0]))) 672185029Spjd return; 673185029Spjd if (ep[j].p_type == PT_LOAD) 674185029Spjd j++; 675185029Spjd } 676185029Spjd for (i = 0; i < 2; i++) { 677185029Spjd p = PTOV(ep[i].p_paddr & 0xffffff); 678185029Spjd off = ep[i].p_offset; 679185029Spjd if (xfsread(&dn, &off, p, ep[i].p_filesz)) 680185029Spjd return; 681185029Spjd } 682185029Spjd p += roundup2(ep[1].p_memsz, PAGE_SIZE); 683185029Spjd bootinfo.bi_symtab = VTOP(p); 684185029Spjd if (hdr.eh.e_shnum == hdr.eh.e_shstrndx + 3) { 685185029Spjd off = hdr.eh.e_shoff + sizeof(es[0]) * 686185029Spjd (hdr.eh.e_shstrndx + 1); 687185029Spjd if (xfsread(&dn, &off, &es, sizeof(es))) 688185029Spjd return; 689185029Spjd for (i = 0; i < 2; i++) { 690185029Spjd memcpy(p, &es[i].sh_size, sizeof(es[i].sh_size)); 691185029Spjd p += sizeof(es[i].sh_size); 692185029Spjd off = es[i].sh_offset; 693185029Spjd if (xfsread(&dn, &off, p, es[i].sh_size)) 694185029Spjd return; 695185029Spjd p += es[i].sh_size; 696185029Spjd } 697185029Spjd } 698185029Spjd addr = hdr.eh.e_entry & 0xffffff; 699185029Spjd } 700185029Spjd bootinfo.bi_esymtab = VTOP(p); 701185029Spjd bootinfo.bi_kernelname = VTOP(kname); 702235329Savg zfsargs.size = sizeof(zfsargs); 703235329Savg zfsargs.pool = zfsmount.spa->spa_guid; 704235329Savg zfsargs.root = zfsmount.rootobj; 705185029Spjd __exec((caddr_t)addr, RB_BOOTINFO | (opts & RBX_MASK), 706185029Spjd bootdev, 707235329Savg KARGS_FLAGS_ZFS | KARGS_FLAGS_EXTARG, 708185029Spjd (uint32_t) spa->spa_guid, 709185029Spjd (uint32_t) (spa->spa_guid >> 32), 710235329Savg VTOP(&bootinfo), 711235329Savg zfsargs); 712185029Spjd} 713185029Spjd 714185029Spjdstatic int 715241288Savgzfs_mount_ds(char *dsname) 716241288Savg{ 717241288Savg uint64_t newroot; 718241288Savg spa_t *newspa; 719241288Savg char *q; 720241288Savg 721241288Savg q = strchr(dsname, '/'); 722241288Savg if (q) 723241288Savg *q++ = '\0'; 724241288Savg newspa = spa_find_by_name(dsname); 725241288Savg if (newspa == NULL) { 726241288Savg printf("\nCan't find ZFS pool %s\n", dsname); 727241288Savg return -1; 728241288Savg } 729241288Savg 730241288Savg if (zfs_spa_init(newspa)) 731241288Savg return -1; 732241288Savg 733241288Savg newroot = 0; 734241288Savg if (q) { 735241288Savg if (zfs_lookup_dataset(newspa, q, &newroot)) { 736241288Savg printf("\nCan't find dataset %s in ZFS pool %s\n", 737241288Savg q, newspa->spa_name); 738241288Savg return -1; 739241288Savg } 740241288Savg } 741241288Savg if (zfs_mount(newspa, newroot, &zfsmount)) { 742241288Savg printf("\nCan't mount ZFS dataset\n"); 743241288Savg return -1; 744241288Savg } 745241288Savg spa = newspa; 746241288Savg return (0); 747241288Savg} 748241288Savg 749241288Savgstatic int 750213136Spjdparse(void) 751185029Spjd{ 752185029Spjd char *arg = cmd; 753185029Spjd char *ep, *p, *q; 754185029Spjd const char *cp; 755185029Spjd int c, i, j; 756185029Spjd 757185029Spjd while ((c = *arg++)) { 758185029Spjd if (c == ' ' || c == '\t' || c == '\n') 759185029Spjd continue; 760185029Spjd for (p = arg; *p && *p != '\n' && *p != ' ' && *p != '\t'; p++); 761185029Spjd ep = p; 762185029Spjd if (*p) 763185029Spjd *p++ = 0; 764185029Spjd if (c == '-') { 765185029Spjd while ((c = *arg++)) { 766185029Spjd if (c == 'P') { 767185029Spjd if (*(uint8_t *)PTOV(0x496) & 0x10) { 768185029Spjd cp = "yes"; 769185029Spjd } else { 770185029Spjd opts |= OPT_SET(RBX_DUAL) | OPT_SET(RBX_SERIAL); 771185029Spjd cp = "no"; 772185029Spjd } 773185029Spjd printf("Keyboard: %s\n", cp); 774185029Spjd continue; 775185029Spjd } else if (c == 'S') { 776185029Spjd j = 0; 777185029Spjd while ((unsigned int)(i = *arg++ - '0') <= 9) 778185029Spjd j = j * 10 + i; 779185029Spjd if (j > 0 && i == -'0') { 780185029Spjd comspeed = j; 781185029Spjd break; 782185029Spjd } 783185029Spjd /* Fall through to error below ('S' not in optstr[]). */ 784185029Spjd } 785185029Spjd for (i = 0; c != optstr[i]; i++) 786185029Spjd if (i == NOPT - 1) 787185029Spjd return -1; 788185029Spjd opts ^= OPT_SET(flags[i]); 789185029Spjd } 790185029Spjd ioctrl = OPT_CHECK(RBX_DUAL) ? (IO_SERIAL|IO_KEYBOARD) : 791185029Spjd OPT_CHECK(RBX_SERIAL) ? IO_SERIAL : IO_KEYBOARD; 792185029Spjd if (ioctrl & IO_SERIAL) 793185029Spjd sio_init(115200 / comspeed); 794185029Spjd } if (c == '?') { 795185029Spjd dnode_phys_t dn; 796185029Spjd 797235329Savg if (zfs_lookup(&zfsmount, arg, &dn) == 0) { 798185029Spjd zap_list(spa, &dn); 799185029Spjd } 800185029Spjd return -1; 801185029Spjd } else { 802185029Spjd arg--; 803185029Spjd 804185029Spjd /* 805185029Spjd * Report pool status if the comment is 'status'. Lets 806185029Spjd * hope no-one wants to load /status as a kernel. 807185029Spjd */ 808185029Spjd if (!strcmp(arg, "status")) { 809185029Spjd spa_all_status(); 810185029Spjd return -1; 811185029Spjd } 812185029Spjd 813185029Spjd /* 814241288Savg * If there is "zfs:" prefix simply ignore it. 815241288Savg */ 816241288Savg if (strncmp(arg, "zfs:", 4) == 0) 817241288Savg arg += 4; 818241288Savg 819241288Savg /* 820185029Spjd * If there is a colon, switch pools. 821185029Spjd */ 822241288Savg q = strchr(arg, ':'); 823185029Spjd if (q) { 824241288Savg *q++ = '\0'; 825241288Savg if (zfs_mount_ds(arg) != 0) 826185029Spjd return -1; 827241288Savg arg = q; 828185029Spjd } 829185029Spjd if ((i = ep - arg)) { 830185029Spjd if ((size_t)i >= sizeof(kname)) 831185029Spjd return -1; 832185029Spjd memcpy(kname, arg, i + 1); 833185029Spjd } 834185029Spjd } 835185029Spjd arg = p; 836185029Spjd } 837185029Spjd return 0; 838185029Spjd} 839