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: stable/10/sys/boot/i386/zfsboot/zfsboot.c 308915 2016-11-21 10:14:36Z 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" 45295453Semaste#include "paths.h" 46185029Spjd 47235329Savg#include "libzfs.h" 48235329Savg 49185029Spjd#define ARGS 0x900 50185029Spjd#define NOPT 14 51185029Spjd#define NDEV 3 52185029Spjd 53212805Spjd#define BIOS_NUMDRIVES 0x475 54185029Spjd#define DRV_HARD 0x80 55185029Spjd#define DRV_MASK 0x7f 56185029Spjd 57185029Spjd#define TYPE_AD 0 58185029Spjd#define TYPE_DA 1 59185029Spjd#define TYPE_MAXHARD TYPE_DA 60185029Spjd#define TYPE_FD 2 61185029Spjd 62185029Spjdextern uint32_t _end; 63185029Spjd 64185096Sdfr#ifdef GPT 65185096Sdfrstatic const uuid_t freebsd_zfs_uuid = GPT_ENT_TYPE_FREEBSD_ZFS; 66185096Sdfr#endif 67185029Spjdstatic const char optstr[NOPT] = "DhaCcdgmnpqrsv"; /* Also 'P', 'S' */ 68185029Spjdstatic const unsigned char flags[NOPT] = { 69185029Spjd RBX_DUAL, 70185029Spjd RBX_SERIAL, 71185029Spjd RBX_ASKNAME, 72185029Spjd RBX_CDROM, 73185029Spjd RBX_CONFIG, 74185029Spjd RBX_KDB, 75185029Spjd RBX_GDB, 76185029Spjd RBX_MUTE, 77185029Spjd RBX_NOINTR, 78185029Spjd RBX_PAUSE, 79185029Spjd RBX_QUIET, 80185029Spjd RBX_DFLTROOT, 81185029Spjd RBX_SINGLE, 82185029Spjd RBX_VERBOSE 83185029Spjd}; 84213136Spjduint32_t opts; 85185029Spjd 86185029Spjdstatic const unsigned char dev_maj[NDEV] = {30, 4, 2}; 87185029Spjd 88185029Spjdstatic char cmd[512]; 89234339Savgstatic char cmddup[512]; 90185029Spjdstatic char kname[1024]; 91235329Savgstatic char rootname[256]; 92185029Spjdstatic int comspeed = SIOSPD; 93185029Spjdstatic struct bootinfo bootinfo; 94185029Spjdstatic uint32_t bootdev; 95235329Savgstatic struct zfs_boot_args zfsargs; 96235329Savgstatic struct zfsmount zfsmount; 97185029Spjd 98200309Sjhbvm_offset_t high_heap_base; 99200309Sjhbuint32_t bios_basemem, bios_extmem, high_heap_size; 100200309Sjhb 101200309Sjhbstatic struct bios_smap smap; 102200309Sjhb 103200309Sjhb/* 104200309Sjhb * The minimum amount of memory to reserve in bios_extmem for the heap. 105200309Sjhb */ 106200309Sjhb#define HEAP_MIN (3 * 1024 * 1024) 107200309Sjhb 108200309Sjhbstatic char *heap_next; 109200309Sjhbstatic char *heap_end; 110200309Sjhb 111185029Spjd/* Buffers that must not span a 64k boundary. */ 112185029Spjd#define READ_BUF_SIZE 8192 113185029Spjdstruct dmadat { 114185029Spjd char rdbuf[READ_BUF_SIZE]; /* for reading large things */ 115185029Spjd char secbuf[READ_BUF_SIZE]; /* for MBR/disklabel */ 116185029Spjd}; 117185029Spjdstatic struct dmadat *dmadat; 118185029Spjd 119185029Spjdvoid exit(int); 120308915Savgvoid reboot(void); 121185029Spjdstatic void load(void); 122185029Spjdstatic int parse(void); 123200309Sjhbstatic void bios_getmem(void); 124185029Spjd 125185029Spjdstatic void * 126185029Spjdmalloc(size_t n) 127185029Spjd{ 128185029Spjd char *p = heap_next; 129185029Spjd if (p + n > heap_end) { 130185029Spjd printf("malloc failure\n"); 131185029Spjd for (;;) 132185029Spjd ; 133185029Spjd return 0; 134185029Spjd } 135185029Spjd heap_next += n; 136185029Spjd return p; 137185029Spjd} 138185029Spjd 139185029Spjdstatic char * 140185029Spjdstrdup(const char *s) 141185029Spjd{ 142185029Spjd char *p = malloc(strlen(s) + 1); 143185029Spjd strcpy(p, s); 144185029Spjd return p; 145185029Spjd} 146185029Spjd 147185029Spjd#include "zfsimpl.c" 148185029Spjd 149185029Spjd/* 150185029Spjd * Read from a dnode (which must be from a ZPL filesystem). 151185029Spjd */ 152185029Spjdstatic int 153185029Spjdzfs_read(spa_t *spa, const dnode_phys_t *dnode, off_t *offp, void *start, size_t size) 154185029Spjd{ 155185029Spjd const znode_phys_t *zp = (const znode_phys_t *) dnode->dn_bonus; 156185029Spjd size_t n; 157185029Spjd int rc; 158185029Spjd 159185029Spjd n = size; 160185029Spjd if (*offp + n > zp->zp_size) 161185029Spjd n = zp->zp_size - *offp; 162308915Savg 163185029Spjd rc = dnode_read(spa, dnode, *offp, start, n); 164185029Spjd if (rc) 165185029Spjd return (-1); 166185029Spjd *offp += n; 167185029Spjd 168185029Spjd return (n); 169185029Spjd} 170185029Spjd 171185029Spjd/* 172185029Spjd * Current ZFS pool 173185029Spjd */ 174235329Savgstatic spa_t *spa; 175241293Savgstatic spa_t *primary_spa; 176241293Savgstatic vdev_t *primary_vdev; 177185029Spjd 178185029Spjd/* 179185029Spjd * A wrapper for dskread that doesn't have to worry about whether the 180185029Spjd * buffer pointer crosses a 64k boundary. 181185029Spjd */ 182185029Spjdstatic int 183185029Spjdvdev_read(vdev_t *vdev, void *priv, off_t off, void *buf, size_t bytes) 184185029Spjd{ 185185029Spjd char *p; 186199579Sjhb daddr_t lba; 187199579Sjhb unsigned int nb; 188185029Spjd struct dsk *dsk = (struct dsk *) priv; 189185029Spjd 190185029Spjd if ((off & (DEV_BSIZE - 1)) || (bytes & (DEV_BSIZE - 1))) 191185029Spjd return -1; 192185029Spjd 193185029Spjd p = buf; 194185029Spjd lba = off / DEV_BSIZE; 195213136Spjd lba += dsk->start; 196185029Spjd while (bytes > 0) { 197185029Spjd nb = bytes / DEV_BSIZE; 198185029Spjd if (nb > READ_BUF_SIZE / DEV_BSIZE) 199185029Spjd nb = READ_BUF_SIZE / DEV_BSIZE; 200185029Spjd if (drvread(dsk, dmadat->rdbuf, lba, nb)) 201185029Spjd return -1; 202185029Spjd memcpy(p, dmadat->rdbuf, nb * DEV_BSIZE); 203185029Spjd p += nb * DEV_BSIZE; 204185029Spjd lba += nb; 205185029Spjd bytes -= nb * DEV_BSIZE; 206185029Spjd } 207185029Spjd 208185029Spjd return 0; 209185029Spjd} 210185029Spjd 211185029Spjdstatic int 212308915Savgvdev_write(vdev_t *vdev, void *priv, off_t off, void *buf, size_t bytes) 213308915Savg{ 214308915Savg char *p; 215308915Savg daddr_t lba; 216308915Savg unsigned int nb; 217308915Savg struct dsk *dsk = (struct dsk *) priv; 218308915Savg 219308915Savg if ((off & (DEV_BSIZE - 1)) || (bytes & (DEV_BSIZE - 1))) 220308915Savg return -1; 221308915Savg 222308915Savg p = buf; 223308915Savg lba = off / DEV_BSIZE; 224308915Savg lba += dsk->start; 225308915Savg while (bytes > 0) { 226308915Savg nb = bytes / DEV_BSIZE; 227308915Savg if (nb > READ_BUF_SIZE / DEV_BSIZE) 228308915Savg nb = READ_BUF_SIZE / DEV_BSIZE; 229308915Savg memcpy(dmadat->rdbuf, p, nb * DEV_BSIZE); 230308915Savg if (drvwrite(dsk, dmadat->rdbuf, lba, nb)) 231308915Savg return -1; 232308915Savg p += nb * DEV_BSIZE; 233308915Savg lba += nb; 234308915Savg bytes -= nb * DEV_BSIZE; 235308915Savg } 236308915Savg 237308915Savg return 0; 238308915Savg} 239308915Savg 240308915Savgstatic int 241185029Spjdxfsread(const dnode_phys_t *dnode, off_t *offp, void *buf, size_t nbyte) 242185029Spjd{ 243185029Spjd if ((size_t)zfs_read(spa, dnode, offp, buf, nbyte) != nbyte) { 244235329Savg printf("Invalid format\n"); 245185029Spjd return -1; 246185029Spjd } 247185029Spjd return 0; 248185029Spjd} 249185029Spjd 250308915Savg/* 251308915Savg * Read Pad2 (formerly "Boot Block Header") area of the first 252308915Savg * vdev label of the given vdev. 253308915Savg */ 254308915Savgstatic int 255308915Savgvdev_read_pad2(vdev_t *vdev, char *buf, size_t size) 256308915Savg{ 257308915Savg blkptr_t bp; 258308915Savg char *tmp = zap_scratch; 259308915Savg off_t off = offsetof(vdev_label_t, vl_pad2); 260308915Savg 261308915Savg if (size > VDEV_PAD_SIZE) 262308915Savg size = VDEV_PAD_SIZE; 263308915Savg 264308915Savg BP_ZERO(&bp); 265308915Savg BP_SET_LSIZE(&bp, VDEV_PAD_SIZE); 266308915Savg BP_SET_PSIZE(&bp, VDEV_PAD_SIZE); 267308915Savg BP_SET_CHECKSUM(&bp, ZIO_CHECKSUM_LABEL); 268308915Savg BP_SET_COMPRESS(&bp, ZIO_COMPRESS_OFF); 269308915Savg DVA_SET_OFFSET(BP_IDENTITY(&bp), off); 270308915Savg if (vdev_read_phys(vdev, &bp, tmp, off, 0)) 271308915Savg return (EIO); 272308915Savg memcpy(buf, tmp, size); 273308915Savg return (0); 274308915Savg} 275308915Savg 276308915Savgstatic int 277308915Savgvdev_clear_pad2(vdev_t *vdev) 278308915Savg{ 279308915Savg char *zeroes = zap_scratch; 280308915Savg uint64_t *end; 281308915Savg off_t off = offsetof(vdev_label_t, vl_pad2); 282308915Savg 283308915Savg memset(zeroes, 0, VDEV_PAD_SIZE); 284308915Savg end = (uint64_t *)(zeroes + VDEV_PAD_SIZE); 285308915Savg /* ZIO_CHECKSUM_LABEL magic and pre-calcualted checksum for all zeros */ 286308915Savg end[-5] = 0x0210da7ab10c7a11; 287308915Savg end[-4] = 0x97f48f807f6e2a3f; 288308915Savg end[-3] = 0xaf909f1658aacefc; 289308915Savg end[-2] = 0xcbd1ea57ff6db48b; 290308915Savg end[-1] = 0x6ec692db0d465fab; 291308915Savg if (vdev_write(vdev, vdev->v_read_priv, off, zeroes, VDEV_PAD_SIZE)) 292308915Savg return (EIO); 293308915Savg return (0); 294308915Savg} 295308915Savg 296200309Sjhbstatic void 297200309Sjhbbios_getmem(void) 298185029Spjd{ 299200309Sjhb uint64_t size; 300185029Spjd 301200309Sjhb /* Parse system memory map */ 302200309Sjhb v86.ebx = 0; 303200309Sjhb do { 304200309Sjhb v86.ctl = V86_FLAGS; 305200309Sjhb v86.addr = 0x15; /* int 0x15 function 0xe820*/ 306200309Sjhb v86.eax = 0xe820; 307200309Sjhb v86.ecx = sizeof(struct bios_smap); 308200309Sjhb v86.edx = SMAP_SIG; 309200309Sjhb v86.es = VTOPSEG(&smap); 310200309Sjhb v86.edi = VTOPOFF(&smap); 311200309Sjhb v86int(); 312294480Sjhb if (V86_CY(v86.efl) || (v86.eax != SMAP_SIG)) 313200309Sjhb break; 314200309Sjhb /* look for a low-memory segment that's large enough */ 315200309Sjhb if ((smap.type == SMAP_TYPE_MEMORY) && (smap.base == 0) && 316200309Sjhb (smap.length >= (512 * 1024))) 317200309Sjhb bios_basemem = smap.length; 318200309Sjhb /* look for the first segment in 'extended' memory */ 319200309Sjhb if ((smap.type == SMAP_TYPE_MEMORY) && (smap.base == 0x100000)) { 320200309Sjhb bios_extmem = smap.length; 321200309Sjhb } 322200309Sjhb 323200309Sjhb /* 324200309Sjhb * Look for the largest segment in 'extended' memory beyond 325200309Sjhb * 1MB but below 4GB. 326200309Sjhb */ 327200309Sjhb if ((smap.type == SMAP_TYPE_MEMORY) && (smap.base > 0x100000) && 328200309Sjhb (smap.base < 0x100000000ull)) { 329200309Sjhb size = smap.length; 330200309Sjhb 331200309Sjhb /* 332200309Sjhb * If this segment crosses the 4GB boundary, truncate it. 333200309Sjhb */ 334200309Sjhb if (smap.base + size > 0x100000000ull) 335200309Sjhb size = 0x100000000ull - smap.base; 336200309Sjhb 337200309Sjhb if (size > high_heap_size) { 338200309Sjhb high_heap_size = size; 339200309Sjhb high_heap_base = smap.base; 340200309Sjhb } 341200309Sjhb } 342200309Sjhb } while (v86.ebx != 0); 343200309Sjhb 344200309Sjhb /* Fall back to the old compatibility function for base memory */ 345200309Sjhb if (bios_basemem == 0) { 346200309Sjhb v86.ctl = 0; 347200309Sjhb v86.addr = 0x12; /* int 0x12 */ 348200309Sjhb v86int(); 349200309Sjhb 350200309Sjhb bios_basemem = (v86.eax & 0xffff) * 1024; 351200309Sjhb } 352200309Sjhb 353200309Sjhb /* Fall back through several compatibility functions for extended memory */ 354200309Sjhb if (bios_extmem == 0) { 355200309Sjhb v86.ctl = V86_FLAGS; 356200309Sjhb v86.addr = 0x15; /* int 0x15 function 0xe801*/ 357200309Sjhb v86.eax = 0xe801; 358200309Sjhb v86int(); 359294480Sjhb if (!V86_CY(v86.efl)) { 360200309Sjhb bios_extmem = ((v86.ecx & 0xffff) + ((v86.edx & 0xffff) * 64)) * 1024; 361200309Sjhb } 362200309Sjhb } 363200309Sjhb if (bios_extmem == 0) { 364200309Sjhb v86.ctl = 0; 365200309Sjhb v86.addr = 0x15; /* int 0x15 function 0x88*/ 366200309Sjhb v86.eax = 0x8800; 367200309Sjhb v86int(); 368200309Sjhb bios_extmem = (v86.eax & 0xffff) * 1024; 369200309Sjhb } 370200309Sjhb 371200309Sjhb /* 372200309Sjhb * If we have extended memory and did not find a suitable heap 373200309Sjhb * region in the SMAP, use the last 3MB of 'extended' memory as a 374200309Sjhb * high heap candidate. 375200309Sjhb */ 376200309Sjhb if (bios_extmem >= HEAP_MIN && high_heap_size < HEAP_MIN) { 377200309Sjhb high_heap_size = HEAP_MIN; 378200309Sjhb high_heap_base = bios_extmem + 0x100000 - HEAP_MIN; 379200309Sjhb } 380200309Sjhb} 381200309Sjhb 382185029Spjd/* 383185029Spjd * Try to detect a device supported by the legacy int13 BIOS 384185029Spjd */ 385185029Spjdstatic int 386185029Spjdint13probe(int drive) 387185029Spjd{ 388185029Spjd v86.ctl = V86_FLAGS; 389185029Spjd v86.addr = 0x13; 390185029Spjd v86.eax = 0x800; 391185029Spjd v86.edx = drive; 392185029Spjd v86int(); 393185029Spjd 394294480Sjhb if (!V86_CY(v86.efl) && /* carry clear */ 395185029Spjd ((v86.edx & 0xff) != (drive & DRV_MASK))) { /* unit # OK */ 396185029Spjd if ((v86.ecx & 0x3f) == 0) { /* absurd sector size */ 397185029Spjd return(0); /* skip device */ 398185029Spjd } 399185029Spjd return (1); 400185029Spjd } 401185029Spjd return(0); 402185029Spjd} 403185029Spjd 404192194Sdfr/* 405192194Sdfr * We call this when we find a ZFS vdev - ZFS consumes the dsk 406192194Sdfr * structure so we must make a new one. 407192194Sdfr */ 408192194Sdfrstatic struct dsk * 409192194Sdfrcopy_dsk(struct dsk *dsk) 410192194Sdfr{ 411192194Sdfr struct dsk *newdsk; 412192194Sdfr 413192194Sdfr newdsk = malloc(sizeof(struct dsk)); 414192194Sdfr *newdsk = *dsk; 415192194Sdfr return (newdsk); 416192194Sdfr} 417192194Sdfr 418185029Spjdstatic void 419241294Savgprobe_drive(struct dsk *dsk) 420185029Spjd{ 421185096Sdfr#ifdef GPT 422185096Sdfr struct gpt_hdr hdr; 423185096Sdfr struct gpt_ent *ent; 424185096Sdfr daddr_t slba, elba; 425185096Sdfr unsigned part, entries_per_sec; 426185096Sdfr#endif 427185029Spjd struct dos_partition *dp; 428185029Spjd char *sec; 429185029Spjd unsigned i; 430185029Spjd 431185029Spjd /* 432185029Spjd * If we find a vdev on the whole disk, stop here. Otherwise dig 433241294Savg * out the partition table and probe each slice/partition 434241294Savg * in turn for a vdev. 435185029Spjd */ 436241294Savg if (vdev_probe(vdev_read, dsk, NULL) == 0) 437185029Spjd return; 438185029Spjd 439185029Spjd sec = dmadat->secbuf; 440185029Spjd dsk->start = 0; 441185096Sdfr 442185096Sdfr#ifdef GPT 443185096Sdfr /* 444185096Sdfr * First check for GPT. 445185096Sdfr */ 446185096Sdfr if (drvread(dsk, sec, 1, 1)) { 447185096Sdfr return; 448185096Sdfr } 449185096Sdfr memcpy(&hdr, sec, sizeof(hdr)); 450185096Sdfr if (memcmp(hdr.hdr_sig, GPT_HDR_SIG, sizeof(hdr.hdr_sig)) != 0 || 451185096Sdfr hdr.hdr_lba_self != 1 || hdr.hdr_revision < 0x00010000 || 452185096Sdfr hdr.hdr_entsz < sizeof(*ent) || DEV_BSIZE % hdr.hdr_entsz != 0) { 453185096Sdfr goto trymbr; 454185096Sdfr } 455185096Sdfr 456185096Sdfr /* 457185096Sdfr * Probe all GPT partitions for the presense of ZFS pools. We 458185096Sdfr * return the spa_t for the first we find (if requested). This 459185096Sdfr * will have the effect of booting from the first pool on the 460185096Sdfr * disk. 461185096Sdfr */ 462185096Sdfr entries_per_sec = DEV_BSIZE / hdr.hdr_entsz; 463185096Sdfr slba = hdr.hdr_lba_table; 464185096Sdfr elba = slba + hdr.hdr_entries / entries_per_sec; 465185096Sdfr while (slba < elba) { 466198420Srnoland dsk->start = 0; 467185096Sdfr if (drvread(dsk, sec, slba, 1)) 468185096Sdfr return; 469185096Sdfr for (part = 0; part < entries_per_sec; part++) { 470185096Sdfr ent = (struct gpt_ent *)(sec + part * hdr.hdr_entsz); 471185096Sdfr if (memcmp(&ent->ent_type, &freebsd_zfs_uuid, 472185096Sdfr sizeof(uuid_t)) == 0) { 473185096Sdfr dsk->start = ent->ent_lba_start; 474241294Savg if (vdev_probe(vdev_read, dsk, NULL) == 0) { 475185096Sdfr /* 476185096Sdfr * This slice had a vdev. We need a new dsk 477185096Sdfr * structure now since the vdev now owns this one. 478185096Sdfr */ 479192194Sdfr dsk = copy_dsk(dsk); 480185096Sdfr } 481185096Sdfr } 482185096Sdfr } 483185096Sdfr slba++; 484185096Sdfr } 485185096Sdfr return; 486185096Sdfrtrymbr: 487185096Sdfr#endif 488185096Sdfr 489185029Spjd if (drvread(dsk, sec, DOSBBSECTOR, 1)) 490185029Spjd return; 491185029Spjd dp = (void *)(sec + DOSPARTOFF); 492185029Spjd 493185029Spjd for (i = 0; i < NDOSPART; i++) { 494185029Spjd if (!dp[i].dp_typ) 495185029Spjd continue; 496185029Spjd dsk->start = dp[i].dp_start; 497241294Savg if (vdev_probe(vdev_read, dsk, NULL) == 0) { 498185029Spjd /* 499185029Spjd * This slice had a vdev. We need a new dsk structure now 500185096Sdfr * since the vdev now owns this one. 501185029Spjd */ 502192194Sdfr dsk = copy_dsk(dsk); 503185029Spjd } 504185029Spjd } 505185029Spjd} 506185029Spjd 507185029Spjdint 508185029Spjdmain(void) 509185029Spjd{ 510185029Spjd dnode_phys_t dn; 511185029Spjd off_t off; 512185029Spjd struct dsk *dsk; 513308915Savg int autoboot, i; 514308915Savg int nextboot; 515308915Savg int rc; 516185029Spjd 517208388Sjhb dmadat = (void *)(roundup2(__base + (int32_t)&_end, 0x10000) - __base); 518208388Sjhb 519200309Sjhb bios_getmem(); 520200309Sjhb 521200309Sjhb if (high_heap_size > 0) { 522200309Sjhb heap_end = PTOV(high_heap_base + high_heap_size); 523200309Sjhb heap_next = PTOV(high_heap_base); 524200309Sjhb } else { 525200309Sjhb heap_next = (char *) dmadat + sizeof(*dmadat); 526200309Sjhb heap_end = (char *) PTOV(bios_basemem); 527200309Sjhb } 528200309Sjhb 529185029Spjd dsk = malloc(sizeof(struct dsk)); 530185029Spjd dsk->drive = *(uint8_t *)PTOV(ARGS); 531185029Spjd dsk->type = dsk->drive & DRV_HARD ? TYPE_AD : TYPE_FD; 532185029Spjd dsk->unit = dsk->drive & DRV_MASK; 533185029Spjd dsk->slice = *(uint8_t *)PTOV(ARGS + 1) + 1; 534185029Spjd dsk->part = 0; 535185029Spjd dsk->start = 0; 536185029Spjd dsk->init = 0; 537185029Spjd 538185029Spjd bootinfo.bi_version = BOOTINFO_VERSION; 539185029Spjd bootinfo.bi_size = sizeof(bootinfo); 540200309Sjhb bootinfo.bi_basemem = bios_basemem / 1024; 541200309Sjhb bootinfo.bi_extmem = bios_extmem / 1024; 542185029Spjd bootinfo.bi_memsizes_valid++; 543185029Spjd bootinfo.bi_bios_dev = dsk->drive; 544185029Spjd 545185029Spjd bootdev = MAKEBOOTDEV(dev_maj[dsk->type], 546305615Spfg dsk->slice, dsk->unit, dsk->part); 547185029Spjd 548185029Spjd /* Process configuration file */ 549185029Spjd 550185029Spjd autoboot = 1; 551185029Spjd 552185029Spjd zfs_init(); 553185029Spjd 554185029Spjd /* 555185029Spjd * Probe the boot drive first - we will try to boot from whatever 556185029Spjd * pool we find on that drive. 557185029Spjd */ 558241294Savg probe_drive(dsk); 559185029Spjd 560185029Spjd /* 561185029Spjd * Probe the rest of the drives that the bios knows about. This 562185029Spjd * will find any other available pools and it may fill in missing 563185029Spjd * vdevs for the boot pool. 564185029Spjd */ 565212805Spjd#ifndef VIRTUALBOX 566212805Spjd for (i = 0; i < *(unsigned char *)PTOV(BIOS_NUMDRIVES); i++) 567212805Spjd#else 568212805Spjd for (i = 0; i < MAXBDDEV; i++) 569212805Spjd#endif 570212805Spjd { 571185029Spjd if ((i | DRV_HARD) == *(uint8_t *)PTOV(ARGS)) 572185029Spjd continue; 573185029Spjd 574192194Sdfr if (!int13probe(i | DRV_HARD)) 575192194Sdfr break; 576192194Sdfr 577185029Spjd dsk = malloc(sizeof(struct dsk)); 578185029Spjd dsk->drive = i | DRV_HARD; 579185029Spjd dsk->type = dsk->drive & TYPE_AD; 580185029Spjd dsk->unit = i; 581185029Spjd dsk->slice = 0; 582185029Spjd dsk->part = 0; 583185029Spjd dsk->start = 0; 584185029Spjd dsk->init = 0; 585241294Savg probe_drive(dsk); 586185029Spjd } 587185029Spjd 588185029Spjd /* 589241294Savg * The first discovered pool, if any, is the pool. 590185029Spjd */ 591241294Savg spa = spa_get_primary(); 592185029Spjd if (!spa) { 593241294Savg printf("%s: No ZFS pools located, can't boot\n", BOOTPROG); 594241294Savg for (;;) 595241294Savg ; 596185029Spjd } 597185029Spjd 598241293Savg primary_spa = spa; 599241293Savg primary_vdev = spa_get_primary_vdev(spa); 600241293Savg 601308915Savg nextboot = 0; 602308915Savg rc = vdev_read_pad2(primary_vdev, cmd, sizeof(cmd)); 603308915Savg if (vdev_clear_pad2(primary_vdev)) 604308915Savg printf("failed to clear pad2 area of primary vdev\n"); 605308915Savg if (rc == 0) { 606308915Savg if (*cmd) { 607308915Savg /* 608308915Savg * We could find an old-style ZFS Boot Block header here. 609308915Savg * Simply ignore it. 610308915Savg */ 611308915Savg if (*(uint64_t *)cmd != 0x2f5b007b10c) { 612308915Savg /* 613308915Savg * Note that parse() is destructive to cmd[] and we also want 614308915Savg * to honor RBX_QUIET option that could be present in cmd[]. 615308915Savg */ 616308915Savg nextboot = 1; 617308915Savg memcpy(cmddup, cmd, sizeof(cmd)); 618308915Savg if (parse()) { 619308915Savg printf("failed to parse pad2 area of primary vdev\n"); 620308915Savg reboot(); 621308915Savg } 622308915Savg if (!OPT_CHECK(RBX_QUIET)) 623308915Savg printf("zfs nextboot: %s\n", cmddup); 624308915Savg } 625308915Savg /* Do not process this command twice */ 626308915Savg *cmd = 0; 627308915Savg } 628308915Savg } else 629308915Savg printf("failed to read pad2 area of primary vdev\n"); 630308915Savg 631308915Savg /* Mount ZFS only if it's not already mounted via nextboot parsing. */ 632308915Savg if (zfsmount.spa == NULL && 633308915Savg (zfs_spa_init(spa) != 0 || zfs_mount(spa, 0, &zfsmount) != 0)) { 634235329Savg printf("%s: failed to mount default pool %s\n", 635235329Savg BOOTPROG, spa->spa_name); 636235329Savg autoboot = 0; 637235329Savg } else if (zfs_lookup(&zfsmount, PATH_CONFIG, &dn) == 0 || 638235329Savg zfs_lookup(&zfsmount, PATH_DOTCONFIG, &dn) == 0) { 639185029Spjd off = 0; 640198079Sjhb zfs_read(spa, &dn, &off, cmd, sizeof(cmd)); 641185029Spjd } 642185029Spjd 643185029Spjd if (*cmd) { 644234339Savg /* 645234339Savg * Note that parse() is destructive to cmd[] and we also want 646234339Savg * to honor RBX_QUIET option that could be present in cmd[]. 647234339Savg */ 648234339Savg memcpy(cmddup, cmd, sizeof(cmd)); 649185029Spjd if (parse()) 650185029Spjd autoboot = 0; 651234339Savg if (!OPT_CHECK(RBX_QUIET)) 652241288Savg printf("%s: %s\n", PATH_CONFIG, cmddup); 653185029Spjd /* Do not process this command twice */ 654185029Spjd *cmd = 0; 655185029Spjd } 656185029Spjd 657308915Savg /* Do not risk waiting at the prompt forever. */ 658308915Savg if (nextboot && !autoboot) 659308915Savg reboot(); 660308915Savg 661185029Spjd /* 662295453Semaste * Try to exec /boot/loader. If interrupted by a keypress, 663185029Spjd * or in case of failure, try to load a kernel directly instead. 664185029Spjd */ 665185029Spjd 666185029Spjd if (autoboot && !*kname) { 667295453Semaste memcpy(kname, PATH_LOADER_ZFS, sizeof(PATH_LOADER_ZFS)); 668213136Spjd if (!keyhit(3)) { 669185029Spjd load(); 670185029Spjd memcpy(kname, PATH_KERNEL, sizeof(PATH_KERNEL)); 671185029Spjd } 672185029Spjd } 673185029Spjd 674185029Spjd /* Present the user with the boot2 prompt. */ 675185029Spjd 676185029Spjd for (;;) { 677235329Savg if (!autoboot || !OPT_CHECK(RBX_QUIET)) { 678235329Savg printf("\nFreeBSD/x86 boot\n"); 679235329Savg if (zfs_rlookup(spa, zfsmount.rootobj, rootname) != 0) 680241288Savg printf("Default: %s/<0x%llx>:%s\n" 681235329Savg "boot: ", 682235329Savg spa->spa_name, zfsmount.rootobj, kname); 683241288Savg else if (rootname[0] != '\0') 684241288Savg printf("Default: %s/%s:%s\n" 685241288Savg "boot: ", 686241288Savg spa->spa_name, rootname, kname); 687235329Savg else 688241288Savg printf("Default: %s:%s\n" 689235329Savg "boot: ", 690241288Savg spa->spa_name, kname); 691235329Savg } 692185029Spjd if (ioctrl & IO_SERIAL) 693185029Spjd sio_flush(); 694213136Spjd if (!autoboot || keyhit(5)) 695213136Spjd getstr(cmd, sizeof(cmd)); 696185029Spjd else if (!autoboot || !OPT_CHECK(RBX_QUIET)) 697185029Spjd putchar('\n'); 698185029Spjd autoboot = 0; 699185029Spjd if (parse()) 700185029Spjd putchar('\a'); 701185029Spjd else 702185029Spjd load(); 703185029Spjd } 704185029Spjd} 705185029Spjd 706185029Spjd/* XXX - Needed for btxld to link the boot2 binary; do not remove. */ 707185029Spjdvoid 708185029Spjdexit(int x) 709185029Spjd{ 710308915Savg __exit(x); 711185029Spjd} 712185029Spjd 713308915Savgvoid 714308915Savgreboot(void) 715308915Savg{ 716308915Savg __exit(0); 717308915Savg} 718308915Savg 719185029Spjdstatic void 720185029Spjdload(void) 721185029Spjd{ 722185029Spjd union { 723185029Spjd struct exec ex; 724185029Spjd Elf32_Ehdr eh; 725185029Spjd } hdr; 726185029Spjd static Elf32_Phdr ep[2]; 727185029Spjd static Elf32_Shdr es[2]; 728185029Spjd caddr_t p; 729185029Spjd dnode_phys_t dn; 730185029Spjd off_t off; 731185029Spjd uint32_t addr, x; 732185029Spjd int fmt, i, j; 733185029Spjd 734235329Savg if (zfs_lookup(&zfsmount, kname, &dn)) { 735235329Savg printf("\nCan't find %s\n", kname); 736185029Spjd return; 737185029Spjd } 738185029Spjd off = 0; 739185029Spjd if (xfsread(&dn, &off, &hdr, sizeof(hdr))) 740185029Spjd return; 741185029Spjd if (N_GETMAGIC(hdr.ex) == ZMAGIC) 742185029Spjd fmt = 0; 743185029Spjd else if (IS_ELF(hdr.eh)) 744185029Spjd fmt = 1; 745185029Spjd else { 746185029Spjd printf("Invalid %s\n", "format"); 747185029Spjd return; 748185029Spjd } 749185029Spjd if (fmt == 0) { 750185029Spjd addr = hdr.ex.a_entry & 0xffffff; 751185029Spjd p = PTOV(addr); 752185029Spjd off = PAGE_SIZE; 753185029Spjd if (xfsread(&dn, &off, p, hdr.ex.a_text)) 754185029Spjd return; 755185029Spjd p += roundup2(hdr.ex.a_text, PAGE_SIZE); 756185029Spjd if (xfsread(&dn, &off, p, hdr.ex.a_data)) 757185029Spjd return; 758185029Spjd p += hdr.ex.a_data + roundup2(hdr.ex.a_bss, PAGE_SIZE); 759185029Spjd bootinfo.bi_symtab = VTOP(p); 760185029Spjd memcpy(p, &hdr.ex.a_syms, sizeof(hdr.ex.a_syms)); 761185029Spjd p += sizeof(hdr.ex.a_syms); 762185029Spjd if (hdr.ex.a_syms) { 763185029Spjd if (xfsread(&dn, &off, p, hdr.ex.a_syms)) 764185029Spjd return; 765185029Spjd p += hdr.ex.a_syms; 766185029Spjd if (xfsread(&dn, &off, p, sizeof(int))) 767185029Spjd return; 768185029Spjd x = *(uint32_t *)p; 769185029Spjd p += sizeof(int); 770185029Spjd x -= sizeof(int); 771185029Spjd if (xfsread(&dn, &off, p, x)) 772185029Spjd return; 773185029Spjd p += x; 774185029Spjd } 775185029Spjd } else { 776185029Spjd off = hdr.eh.e_phoff; 777185029Spjd for (j = i = 0; i < hdr.eh.e_phnum && j < 2; i++) { 778185029Spjd if (xfsread(&dn, &off, ep + j, sizeof(ep[0]))) 779185029Spjd return; 780185029Spjd if (ep[j].p_type == PT_LOAD) 781185029Spjd j++; 782185029Spjd } 783185029Spjd for (i = 0; i < 2; i++) { 784185029Spjd p = PTOV(ep[i].p_paddr & 0xffffff); 785185029Spjd off = ep[i].p_offset; 786185029Spjd if (xfsread(&dn, &off, p, ep[i].p_filesz)) 787185029Spjd return; 788185029Spjd } 789185029Spjd p += roundup2(ep[1].p_memsz, PAGE_SIZE); 790185029Spjd bootinfo.bi_symtab = VTOP(p); 791185029Spjd if (hdr.eh.e_shnum == hdr.eh.e_shstrndx + 3) { 792185029Spjd off = hdr.eh.e_shoff + sizeof(es[0]) * 793185029Spjd (hdr.eh.e_shstrndx + 1); 794185029Spjd if (xfsread(&dn, &off, &es, sizeof(es))) 795185029Spjd return; 796185029Spjd for (i = 0; i < 2; i++) { 797185029Spjd memcpy(p, &es[i].sh_size, sizeof(es[i].sh_size)); 798185029Spjd p += sizeof(es[i].sh_size); 799185029Spjd off = es[i].sh_offset; 800185029Spjd if (xfsread(&dn, &off, p, es[i].sh_size)) 801185029Spjd return; 802185029Spjd p += es[i].sh_size; 803185029Spjd } 804185029Spjd } 805185029Spjd addr = hdr.eh.e_entry & 0xffffff; 806185029Spjd } 807185029Spjd bootinfo.bi_esymtab = VTOP(p); 808185029Spjd bootinfo.bi_kernelname = VTOP(kname); 809235329Savg zfsargs.size = sizeof(zfsargs); 810235329Savg zfsargs.pool = zfsmount.spa->spa_guid; 811235329Savg zfsargs.root = zfsmount.rootobj; 812241293Savg zfsargs.primary_pool = primary_spa->spa_guid; 813241293Savg if (primary_vdev != NULL) 814241293Savg zfsargs.primary_vdev = primary_vdev->v_guid; 815241293Savg else 816241293Savg printf("failed to detect primary vdev\n"); 817185029Spjd __exec((caddr_t)addr, RB_BOOTINFO | (opts & RBX_MASK), 818185029Spjd bootdev, 819235329Savg KARGS_FLAGS_ZFS | KARGS_FLAGS_EXTARG, 820185029Spjd (uint32_t) spa->spa_guid, 821185029Spjd (uint32_t) (spa->spa_guid >> 32), 822235329Savg VTOP(&bootinfo), 823235329Savg zfsargs); 824185029Spjd} 825185029Spjd 826185029Spjdstatic int 827241288Savgzfs_mount_ds(char *dsname) 828241288Savg{ 829241288Savg uint64_t newroot; 830241288Savg spa_t *newspa; 831241288Savg char *q; 832241288Savg 833241288Savg q = strchr(dsname, '/'); 834241288Savg if (q) 835241288Savg *q++ = '\0'; 836241288Savg newspa = spa_find_by_name(dsname); 837241288Savg if (newspa == NULL) { 838241288Savg printf("\nCan't find ZFS pool %s\n", dsname); 839241288Savg return -1; 840241288Savg } 841241288Savg 842241288Savg if (zfs_spa_init(newspa)) 843241288Savg return -1; 844241288Savg 845241288Savg newroot = 0; 846241288Savg if (q) { 847241288Savg if (zfs_lookup_dataset(newspa, q, &newroot)) { 848241288Savg printf("\nCan't find dataset %s in ZFS pool %s\n", 849241288Savg q, newspa->spa_name); 850241288Savg return -1; 851241288Savg } 852241288Savg } 853241288Savg if (zfs_mount(newspa, newroot, &zfsmount)) { 854241288Savg printf("\nCan't mount ZFS dataset\n"); 855241288Savg return -1; 856241288Savg } 857241288Savg spa = newspa; 858241288Savg return (0); 859241288Savg} 860241288Savg 861241288Savgstatic int 862213136Spjdparse(void) 863185029Spjd{ 864185029Spjd char *arg = cmd; 865185029Spjd char *ep, *p, *q; 866185029Spjd const char *cp; 867185029Spjd int c, i, j; 868185029Spjd 869185029Spjd while ((c = *arg++)) { 870185029Spjd if (c == ' ' || c == '\t' || c == '\n') 871185029Spjd continue; 872185029Spjd for (p = arg; *p && *p != '\n' && *p != ' ' && *p != '\t'; p++); 873185029Spjd ep = p; 874185029Spjd if (*p) 875185029Spjd *p++ = 0; 876185029Spjd if (c == '-') { 877185029Spjd while ((c = *arg++)) { 878185029Spjd if (c == 'P') { 879185029Spjd if (*(uint8_t *)PTOV(0x496) & 0x10) { 880185029Spjd cp = "yes"; 881185029Spjd } else { 882185029Spjd opts |= OPT_SET(RBX_DUAL) | OPT_SET(RBX_SERIAL); 883185029Spjd cp = "no"; 884185029Spjd } 885185029Spjd printf("Keyboard: %s\n", cp); 886185029Spjd continue; 887185029Spjd } else if (c == 'S') { 888185029Spjd j = 0; 889185029Spjd while ((unsigned int)(i = *arg++ - '0') <= 9) 890185029Spjd j = j * 10 + i; 891185029Spjd if (j > 0 && i == -'0') { 892185029Spjd comspeed = j; 893185029Spjd break; 894185029Spjd } 895185029Spjd /* Fall through to error below ('S' not in optstr[]). */ 896185029Spjd } 897185029Spjd for (i = 0; c != optstr[i]; i++) 898185029Spjd if (i == NOPT - 1) 899185029Spjd return -1; 900185029Spjd opts ^= OPT_SET(flags[i]); 901185029Spjd } 902185029Spjd ioctrl = OPT_CHECK(RBX_DUAL) ? (IO_SERIAL|IO_KEYBOARD) : 903185029Spjd OPT_CHECK(RBX_SERIAL) ? IO_SERIAL : IO_KEYBOARD; 904241301Savg if (ioctrl & IO_SERIAL) { 905241301Savg if (sio_init(115200 / comspeed) != 0) 906241301Savg ioctrl &= ~IO_SERIAL; 907241301Savg } 908185029Spjd } if (c == '?') { 909185029Spjd dnode_phys_t dn; 910185029Spjd 911235329Savg if (zfs_lookup(&zfsmount, arg, &dn) == 0) { 912185029Spjd zap_list(spa, &dn); 913185029Spjd } 914185029Spjd return -1; 915185029Spjd } else { 916185029Spjd arg--; 917185029Spjd 918185029Spjd /* 919185029Spjd * Report pool status if the comment is 'status'. Lets 920185029Spjd * hope no-one wants to load /status as a kernel. 921185029Spjd */ 922185029Spjd if (!strcmp(arg, "status")) { 923185029Spjd spa_all_status(); 924185029Spjd return -1; 925185029Spjd } 926185029Spjd 927185029Spjd /* 928241288Savg * If there is "zfs:" prefix simply ignore it. 929241288Savg */ 930241288Savg if (strncmp(arg, "zfs:", 4) == 0) 931241288Savg arg += 4; 932241288Savg 933241288Savg /* 934185029Spjd * If there is a colon, switch pools. 935185029Spjd */ 936241288Savg q = strchr(arg, ':'); 937185029Spjd if (q) { 938241288Savg *q++ = '\0'; 939241288Savg if (zfs_mount_ds(arg) != 0) 940185029Spjd return -1; 941241288Savg arg = q; 942185029Spjd } 943185029Spjd if ((i = ep - arg)) { 944185029Spjd if ((size_t)i >= sizeof(kname)) 945185029Spjd return -1; 946185029Spjd memcpy(kname, arg, i + 1); 947185029Spjd } 948185029Spjd } 949185029Spjd arg = p; 950185029Spjd } 951185029Spjd return 0; 952185029Spjd} 953