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stand/i386/zfsboot/zfsboot.c

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* implied warranties, including, without limitation, the implied * implied warranties, including, without limitation, the implied
* warranties of merchantability and fitness for a particular * warranties of merchantability and fitness for a particular
* purpose. * purpose.
*/ */
#include <sys/cdefs.h> #include <sys/cdefs.h>
__FBSDID("$FreeBSD$"); __FBSDID("$FreeBSD$");
#include "stand.h" #include <stand.h>
#include <sys/param.h> #include <sys/param.h>
#include <sys/errno.h> #include <sys/errno.h>
#include <sys/diskmbr.h> #include <sys/diskmbr.h>
#ifdef GPT #ifdef GPT
#include <sys/gpt.h> #include <sys/gpt.h>
#endif #endif
#include <sys/reboot.h> #include <sys/reboot.h>
#include <sys/queue.h> #include <sys/queue.h>
#include <machine/bootinfo.h> #include <machine/bootinfo.h>
#include <machine/elf.h> #include <machine/elf.h>
#include <machine/pc/bios.h> #include <machine/pc/bios.h>
#include <stdarg.h> #include <stdarg.h>
#include <stddef.h> #include <stddef.h>
#include <a.out.h> #include <a.out.h>
#include "bootstrap.h"
#include "libi386.h"
#include <btxv86.h> #include <btxv86.h>
#include "lib.h" #include "lib.h"
#include "rbx.h" #include "rbx.h"
#include "drv.h"
#include "edd.h"
#include "cons.h" #include "cons.h"
#include "bootargs.h" #include "bootargs.h"
#include "disk.h"
#include "part.h"
#include "paths.h" #include "paths.h"
#include "libzfs.h" #include "libzfs.h"
#define ARGS 0x900 #define ARGS 0x900
#define NOPT 14 #define NOPT 14
#define NDEV 3 #define NDEV 3
#define BIOS_NUMDRIVES 0x475 #define BIOS_NUMDRIVES 0x475
#define DRV_HARD 0x80 #define DRV_HARD 0x80
#define DRV_MASK 0x7f #define DRV_MASK 0x7f
#define TYPE_AD 0 #define TYPE_AD 0
#define TYPE_DA 1 #define TYPE_DA 1
#define TYPE_MAXHARD TYPE_DA #define TYPE_MAXHARD TYPE_DA
#define TYPE_FD 2 #define TYPE_FD 2
#define DEV_GELIBOOT_BSIZE 4096
extern uint32_t _end; extern uint32_t _end;
#ifdef GPT
static const uuid_t freebsd_zfs_uuid = GPT_ENT_TYPE_FREEBSD_ZFS;
#endif
static const char optstr[NOPT] = "DhaCcdgmnpqrsv"; /* Also 'P', 'S' */ static const char optstr[NOPT] = "DhaCcdgmnpqrsv"; /* Also 'P', 'S' */
static const unsigned char flags[NOPT] = { static const unsigned char flags[NOPT] = {
RBX_DUAL, RBX_DUAL,
RBX_SERIAL, RBX_SERIAL,
RBX_ASKNAME, RBX_ASKNAME,
RBX_CDROM, RBX_CDROM,
RBX_CONFIG, RBX_CONFIG,
RBX_KDB, RBX_KDB,
Show All 23 Lines
} loadpath[] = { } loadpath[] = {
{ PATH_LOADER_ZFS, sizeof(PATH_LOADER_ZFS) }, { PATH_LOADER_ZFS, sizeof(PATH_LOADER_ZFS) },
{ PATH_LOADER, sizeof(PATH_LOADER) }, { PATH_LOADER, sizeof(PATH_LOADER) },
{ PATH_KERNEL, sizeof(PATH_KERNEL) }, { PATH_KERNEL, sizeof(PATH_KERNEL) },
}; };
static const unsigned char dev_maj[NDEV] = {30, 4, 2}; static const unsigned char dev_maj[NDEV] = {30, 4, 2};
static struct i386_devdesc *bdev;
static char cmd[512]; static char cmd[512];
static char cmddup[512]; static char cmddup[512];
static char kname[1024]; static char kname[1024];
static char rootname[256];
static int comspeed = SIOSPD; static int comspeed = SIOSPD;
static struct bootinfo bootinfo; static struct bootinfo bootinfo;
static uint32_t bootdev; static uint32_t bootdev;
static struct zfs_boot_args zfsargs; static struct zfs_boot_args zfsargs;
#ifdef LOADER_GELI_SUPPORT
static struct geli_boot_args geliargs;
#endif
vm_offset_t high_heap_base; extern vm_offset_t high_heap_base;
uint32_t bios_basemem, bios_extmem, high_heap_size; extern uint32_t bios_basemem, bios_extmem, high_heap_size;
static struct bios_smap smap; static char *heap_top;
static char *heap_bottom;
/*
* The minimum amount of memory to reserve in bios_extmem for the heap.
*/
#define HEAP_MIN (64 * 1024 * 1024)
static char *heap_next;
static char *heap_end;
/* Buffers that must not span a 64k boundary. */
#define READ_BUF_SIZE 8192
struct dmadat {
char rdbuf[READ_BUF_SIZE]; /* for reading large things */
char secbuf[READ_BUF_SIZE]; /* for MBR/disklabel */
};
static struct dmadat *dmadat;
void exit(int); void exit(int);
void reboot(void); static void i386_zfs_probe(void);
static void load(void); static void load(void);
static int parse_cmd(void); static int parse_cmd(void);
static void bios_getmem(void);
int main(void);
#ifdef LOADER_GELI_SUPPORT #ifdef LOADER_GELI_SUPPORT
#include "geliboot.h" #include "geliboot.h"
static char gelipw[GELI_PW_MAXLEN]; static char gelipw[GELI_PW_MAXLEN];
#endif #endif
struct zfsdsk { struct arch_switch archsw; /* MI/MD interface boundary */
struct dsk dsk; static char boot_devname[2 * ZFS_MAXNAMELEN + 8]; /* disk or pool:dataset */
#ifdef LOADER_GELI_SUPPORT
struct geli_dev *gdev; struct devsw *devsw[] = {
&bioshd,
#if defined(LOADER_ZFS_SUPPORT)
&zfs_dev,
#endif #endif
NULL
}; };
#include "zfsimpl.c" struct fs_ops *file_system[] = {
#if defined(LOADER_ZFS_SUPPORT)
/* &zfs_fsops,
* Read from a dnode (which must be from a ZPL filesystem).
*/
static int
zfs_read(spa_t *spa, const dnode_phys_t *dnode, off_t *offp, void *start,
size_t size)
{
const znode_phys_t *zp = (const znode_phys_t *) dnode->dn_bonus;
size_t n;
int rc;
n = size;
if (*offp + n > zp->zp_size)
n = zp->zp_size - *offp;
rc = dnode_read(spa, dnode, *offp, start, n);
if (rc)
return (-1);
*offp += n;
return (n);
}
/*
* Current ZFS pool
*/
static spa_t *spa;
static spa_t *primary_spa;
static vdev_t *primary_vdev;
/*
* A wrapper for dskread that doesn't have to worry about whether the
* buffer pointer crosses a 64k boundary.
*/
static int
vdev_read(void *xvdev, void *priv, off_t off, void *buf, size_t bytes)
{
char *p;
daddr_t lba, alignlba;
off_t diff;
unsigned int nb, alignnb;
struct zfsdsk *zdsk = priv;
if ((off & (DEV_BSIZE - 1)) || (bytes & (DEV_BSIZE - 1)))
return (-1);
p = buf;
lba = off / DEV_BSIZE;
lba += zdsk->dsk.start;
/*
* Align reads to 4k else 4k sector GELIs will not decrypt.
* Round LBA down to nearest multiple of DEV_GELIBOOT_BSIZE bytes.
*/
alignlba = rounddown2(off, DEV_GELIBOOT_BSIZE) / DEV_BSIZE;
/*
* The read must be aligned to DEV_GELIBOOT_BSIZE bytes relative to the
* start of the GELI partition, not the start of the actual disk.
*/
alignlba += zdsk->dsk.start;
diff = (lba - alignlba) * DEV_BSIZE;
while (bytes > 0) {
nb = bytes / DEV_BSIZE;
/*
* Ensure that the read size plus the leading offset does not
* exceed the size of the read buffer.
*/
if (nb > (READ_BUF_SIZE - diff) / DEV_BSIZE)
nb = (READ_BUF_SIZE - diff) / DEV_BSIZE;
/*
* Round the number of blocks to read up to the nearest multiple
* of DEV_GELIBOOT_BSIZE.
*/
alignnb = roundup2(nb * DEV_BSIZE + diff, DEV_GELIBOOT_BSIZE)
/ DEV_BSIZE;
if (zdsk->dsk.size > 0 && alignlba + alignnb >
zdsk->dsk.size + zdsk->dsk.start) {
printf("Shortening read at %lld from %d to %lld\n",
alignlba, alignnb,
(zdsk->dsk.size + zdsk->dsk.start) - alignlba);
alignnb = (zdsk->dsk.size + zdsk->dsk.start) - alignlba;
}
if (drvread(&zdsk->dsk, dmadat->rdbuf, alignlba, alignnb))
return (-1);
#ifdef LOADER_GELI_SUPPORT
/* decrypt */
if (zdsk->gdev != NULL) {
if (geli_read(zdsk->gdev,
((alignlba - zdsk->dsk.start) * DEV_BSIZE),
dmadat->rdbuf, alignnb * DEV_BSIZE))
return (-1);
}
#endif #endif
memcpy(p, dmadat->rdbuf + diff, nb * DEV_BSIZE); &ufs_fsops,
p += nb * DEV_BSIZE; NULL
lba += nb; };
alignlba += alignnb;
bytes -= nb * DEV_BSIZE;
/* Don't need the leading offset after the first block. */
diff = 0;
}
return (0); caddr_t
} ptov(uintptr_t x)
/* Match the signature exactly due to signature madness */
static int
vdev_read2(vdev_t *vdev, void *priv, off_t off, void *buf, size_t bytes)
{ {
return (vdev_read(vdev, priv, off, buf, bytes)); return (PTOV(x));
} }
static int
vdev_write(vdev_t *vdev, void *priv, off_t off, void *buf, size_t bytes)
{
char *p;
daddr_t lba;
unsigned int nb;
struct zfsdsk *zdsk = priv;
if ((off & (DEV_BSIZE - 1)) || (bytes & (DEV_BSIZE - 1)))
return (-1);
p = buf;
lba = off / DEV_BSIZE;
lba += zdsk->dsk.start;
while (bytes > 0) {
nb = bytes / DEV_BSIZE;
if (nb > READ_BUF_SIZE / DEV_BSIZE)
nb = READ_BUF_SIZE / DEV_BSIZE;
memcpy(dmadat->rdbuf, p, nb * DEV_BSIZE);
if (drvwrite(&zdsk->dsk, dmadat->rdbuf, lba, nb))
return (-1);
p += nb * DEV_BSIZE;
lba += nb;
bytes -= nb * DEV_BSIZE;
}
return (0);
}
static int
xfsread(const dnode_phys_t *dnode, off_t *offp, void *buf, size_t nbyte)
{
if ((size_t)zfs_read(spa, dnode, offp, buf, nbyte) != nbyte) {
printf("Invalid format\n");
return (-1);
}
return (0);
}
/*
* Read Pad2 (formerly "Boot Block Header") area of the first
* vdev label of the given vdev.
*/
static int
vdev_read_pad2(vdev_t *vdev, char *buf, size_t size)
{
blkptr_t bp;
char *tmp;
off_t off = offsetof(vdev_label_t, vl_pad2);
int rc;
if (size > VDEV_PAD_SIZE)
size = VDEV_PAD_SIZE;
tmp = malloc(VDEV_PAD_SIZE);
if (tmp == NULL)
return (ENOMEM);
BP_ZERO(&bp);
BP_SET_LSIZE(&bp, VDEV_PAD_SIZE);
BP_SET_PSIZE(&bp, VDEV_PAD_SIZE);
BP_SET_CHECKSUM(&bp, ZIO_CHECKSUM_LABEL);
BP_SET_COMPRESS(&bp, ZIO_COMPRESS_OFF);
DVA_SET_OFFSET(BP_IDENTITY(&bp), off);
rc = vdev_read_phys(vdev, &bp, tmp, off, 0);
if (rc == 0)
memcpy(buf, tmp, size);
free(tmp);
return (rc);
}
static int
vdev_clear_pad2(vdev_t *vdev)
{
char *zeroes;
uint64_t *end;
off_t off = offsetof(vdev_label_t, vl_pad2);
int rc;
zeroes = malloc(VDEV_PAD_SIZE);
if (zeroes == NULL)
return (ENOMEM);
memset(zeroes, 0, VDEV_PAD_SIZE);
end = (uint64_t *)(zeroes + VDEV_PAD_SIZE);
/* ZIO_CHECKSUM_LABEL magic and pre-calcualted checksum for all zeros */
end[-5] = 0x0210da7ab10c7a11;
end[-4] = 0x97f48f807f6e2a3f;
end[-3] = 0xaf909f1658aacefc;
end[-2] = 0xcbd1ea57ff6db48b;
end[-1] = 0x6ec692db0d465fab;
rc = vdev_write(vdev, vdev->v_read_priv, off, zeroes, VDEV_PAD_SIZE);
free(zeroes);
return (rc);
}
static void
bios_getmem(void)
{
uint64_t size;
/* Parse system memory map */
v86.ebx = 0;
do {
v86.ctl = V86_FLAGS;
v86.addr = 0x15; /* int 0x15 function 0xe820 */
v86.eax = 0xe820;
v86.ecx = sizeof(struct bios_smap);
v86.edx = SMAP_SIG;
v86.es = VTOPSEG(&smap);
v86.edi = VTOPOFF(&smap);
v86int();
if (V86_CY(v86.efl) || (v86.eax != SMAP_SIG))
break;
/* look for a low-memory segment that's large enough */
if ((smap.type == SMAP_TYPE_MEMORY) && (smap.base == 0) &&
(smap.length >= (512 * 1024)))
bios_basemem = smap.length;
/* look for the first segment in 'extended' memory */
if ((smap.type == SMAP_TYPE_MEMORY) &&
(smap.base == 0x100000)) {
bios_extmem = smap.length;
}
/*
* Look for the largest segment in 'extended' memory beyond
* 1MB but below 4GB.
*/
if ((smap.type == SMAP_TYPE_MEMORY) && (smap.base > 0x100000) &&
(smap.base < 0x100000000ull)) {
size = smap.length;
/*
* If this segment crosses the 4GB boundary,
* truncate it.
*/
if (smap.base + size > 0x100000000ull)
size = 0x100000000ull - smap.base;
if (size > high_heap_size) {
high_heap_size = size;
high_heap_base = smap.base;
}
}
} while (v86.ebx != 0);
/* Fall back to the old compatibility function for base memory */
if (bios_basemem == 0) {
v86.ctl = 0;
v86.addr = 0x12; /* int 0x12 */
v86int();
bios_basemem = (v86.eax & 0xffff) * 1024;
}
/*
* Fall back through several compatibility functions for extended
* memory.
*/
if (bios_extmem == 0) {
v86.ctl = V86_FLAGS;
v86.addr = 0x15; /* int 0x15 function 0xe801 */
v86.eax = 0xe801;
v86int();
if (!V86_CY(v86.efl)) {
bios_extmem = ((v86.ecx & 0xffff) +
((v86.edx & 0xffff) * 64)) * 1024;
}
}
if (bios_extmem == 0) {
v86.ctl = 0;
v86.addr = 0x15; /* int 0x15 function 0x88 */
v86.eax = 0x8800;
v86int();
bios_extmem = (v86.eax & 0xffff) * 1024;
}
/*
* If we have extended memory and did not find a suitable heap
* region in the SMAP, use the last 3MB of 'extended' memory as a
* high heap candidate.
*/
if (bios_extmem >= HEAP_MIN && high_heap_size < HEAP_MIN) {
high_heap_size = HEAP_MIN;
high_heap_base = bios_extmem + 0x100000 - HEAP_MIN;
}
}
/*
* Try to detect a device supported by the legacy int13 BIOS
*/
static int
int13probe(int drive)
{
v86.ctl = V86_FLAGS;
v86.addr = 0x13;
v86.eax = 0x800;
v86.edx = drive;
v86int();
if (!V86_CY(v86.efl) && /* carry clear */
((v86.edx & 0xff) != (drive & DRV_MASK))) { /* unit # OK */
if ((v86.ecx & 0x3f) == 0) { /* absurd sector size */
return (0); /* skip device */
}
return (1);
}
return (0);
}
/*
* We call this when we find a ZFS vdev - ZFS consumes the dsk
* structure so we must make a new one.
*/
static struct zfsdsk *
copy_dsk(struct zfsdsk *zdsk)
{
struct zfsdsk *newdsk;
newdsk = malloc(sizeof(struct zfsdsk));
*newdsk = *zdsk;
return (newdsk);
}
/*
* Get disk size from GPT.
*/
static uint64_t
drvsize_gpt(struct dsk *dskp)
{
#ifdef GPT
struct gpt_hdr hdr;
char *sec;
sec = dmadat->secbuf;
if (drvread(dskp, sec, 1, 1))
return (0);
memcpy(&hdr, sec, sizeof(hdr));
if (memcmp(hdr.hdr_sig, GPT_HDR_SIG, sizeof(hdr.hdr_sig)) != 0 ||
hdr.hdr_lba_self != 1 || hdr.hdr_revision < 0x00010000 ||
hdr.hdr_entsz < sizeof(struct gpt_ent) ||
DEV_BSIZE % hdr.hdr_entsz != 0) {
return (0);
}
return (hdr.hdr_lba_alt + 1);
#else
return (0);
#endif
}
/*
* Get disk size from eax=0x800 and 0x4800. We need to probe both
* because 0x4800 may not be available and we would like to get more
* or less correct disk size - if it is possible at all.
* Note we do not really want to touch drv.c because that code is shared
* with boot2 and we can not afford to grow that code.
*/
static uint64_t
drvsize_ext(struct zfsdsk *zdsk)
{
struct dsk *dskp;
uint64_t size, tmp;
int cyl, hds, sec;
dskp = &zdsk->dsk;
/* Try to read disk size from GPT */
size = drvsize_gpt(dskp);
if (size != 0)
return (size);
v86.ctl = V86_FLAGS;
v86.addr = 0x13;
v86.eax = 0x800;
v86.edx = dskp->drive;
v86int();
/* Don't error out if we get bad sector number, try EDD as well */
if (V86_CY(v86.efl) || /* carry set */
(v86.edx & 0xff) <= (unsigned)(dskp->drive & 0x7f)) /* unit # bad */
return (0);
cyl = ((v86.ecx & 0xc0) << 2) + ((v86.ecx & 0xff00) >> 8) + 1;
/* Convert max head # -> # of heads */
hds = ((v86.edx & 0xff00) >> 8) + 1;
sec = v86.ecx & 0x3f;
size = (uint64_t)cyl * hds * sec;
/* Determine if we can use EDD with this device. */
v86.ctl = V86_FLAGS;
v86.addr = 0x13;
v86.eax = 0x4100;
v86.edx = dskp->drive;
v86.ebx = 0x55aa;
v86int();
if (V86_CY(v86.efl) || /* carry set */
(v86.ebx & 0xffff) != 0xaa55 || /* signature */
(v86.ecx & EDD_INTERFACE_FIXED_DISK) == 0)
return (size);
tmp = drvsize(dskp);
if (tmp > size)
size = tmp;
return (size);
}
/*
* The "layered" ioctl to read disk/partition size. Unfortunately
* the zfsboot case is hardest, because we do not have full software
* stack available, so we need to do some manual work here.
*/
uint64_t
ldi_get_size(void *priv)
{
struct zfsdsk *zdsk = priv;
uint64_t size = zdsk->dsk.size;
if (zdsk->dsk.start == 0)
size = drvsize_ext(zdsk);
return (size * DEV_BSIZE);
}
static void
probe_drive(struct zfsdsk *zdsk)
{
#ifdef GPT
struct gpt_hdr hdr;
struct gpt_ent *ent;
unsigned part, entries_per_sec;
daddr_t slba;
#endif
#if defined(GPT) || defined(LOADER_GELI_SUPPORT)
daddr_t elba;
#endif
struct dos_partition *dp;
char *sec;
unsigned i;
#ifdef LOADER_GELI_SUPPORT
/*
* Taste the disk, if it is GELI encrypted, decrypt it then dig out the
* partition table and probe each slice/partition in turn for a vdev or
* GELI encrypted vdev.
*/
elba = drvsize_ext(zdsk);
if (elba > 0) {
elba--;
}
zdsk->gdev = geli_taste(vdev_read, zdsk, elba, "disk%u:0:");
if ((zdsk->gdev != NULL) && (geli_havekey(zdsk->gdev) == 0))
geli_passphrase(zdsk->gdev, gelipw);
#endif /* LOADER_GELI_SUPPORT */
sec = dmadat->secbuf;
zdsk->dsk.start = 0;
#ifdef GPT
/*
* First check for GPT.
*/
if (drvread(&zdsk->dsk, sec, 1, 1)) {
return;
}
memcpy(&hdr, sec, sizeof(hdr));
if (memcmp(hdr.hdr_sig, GPT_HDR_SIG, sizeof(hdr.hdr_sig)) != 0 ||
hdr.hdr_lba_self != 1 || hdr.hdr_revision < 0x00010000 ||
hdr.hdr_entsz < sizeof(*ent) || DEV_BSIZE % hdr.hdr_entsz != 0) {
goto trymbr;
}
/*
* Probe all GPT partitions for the presence of ZFS pools. We
* return the spa_t for the first we find (if requested). This
* will have the effect of booting from the first pool on the
* disk.
*
* If no vdev is found, GELI decrypting the device and try again
*/
entries_per_sec = DEV_BSIZE / hdr.hdr_entsz;
slba = hdr.hdr_lba_table;
elba = slba + hdr.hdr_entries / entries_per_sec;
while (slba < elba) {
zdsk->dsk.start = 0;
if (drvread(&zdsk->dsk, sec, slba, 1))
return;
for (part = 0; part < entries_per_sec; part++) {
ent = (struct gpt_ent *)(sec + part * hdr.hdr_entsz);
if (memcmp(&ent->ent_type, &freebsd_zfs_uuid,
sizeof(uuid_t)) == 0) {
zdsk->dsk.start = ent->ent_lba_start;
zdsk->dsk.size =
ent->ent_lba_end - ent->ent_lba_start + 1;
zdsk->dsk.slice = part + 1;
zdsk->dsk.part = 255;
if (vdev_probe(vdev_read2, zdsk, NULL) == 0) {
/*
* This slice had a vdev. We need a new
* dsk structure now since the vdev now
* owns this one.
*/
zdsk = copy_dsk(zdsk);
}
#ifdef LOADER_GELI_SUPPORT
else if ((zdsk->gdev = geli_taste(vdev_read,
zdsk, ent->ent_lba_end - ent->ent_lba_start,
"disk%up%u:", zdsk->dsk.unit,
zdsk->dsk.slice)) != NULL) {
if (geli_havekey(zdsk->gdev) == 0 ||
geli_passphrase(zdsk->gdev, gelipw)
== 0) {
/*
* This slice has GELI,
* check it for ZFS.
*/
if (vdev_probe(vdev_read2,
zdsk, NULL) == 0) {
/*
* This slice had a
* vdev. We need a new
* dsk structure now
* since the vdev now
* owns this one.
*/
zdsk = copy_dsk(zdsk);
}
break;
}
}
#endif /* LOADER_GELI_SUPPORT */
}
}
slba++;
}
return;
trymbr:
#endif /* GPT */
if (drvread(&zdsk->dsk, sec, DOSBBSECTOR, 1))
return;
dp = (void *)(sec + DOSPARTOFF);
for (i = 0; i < NDOSPART; i++) {
if (!dp[i].dp_typ)
continue;
zdsk->dsk.start = dp[i].dp_start;
zdsk->dsk.size = dp[i].dp_size;
zdsk->dsk.slice = i + 1;
if (vdev_probe(vdev_read2, zdsk, NULL) == 0) {
zdsk = copy_dsk(zdsk);
}
#ifdef LOADER_GELI_SUPPORT
else if ((zdsk->gdev = geli_taste(vdev_read, zdsk,
dp[i].dp_size - dp[i].dp_start, "disk%us%u:")) != NULL) {
if (geli_havekey(zdsk->gdev) == 0 ||
geli_passphrase(zdsk->gdev, gelipw) == 0) {
/*
* This slice has GELI, check it for ZFS.
*/
if (vdev_probe(vdev_read2, zdsk, NULL) == 0) {
/*
* This slice had a vdev. We need a new
* dsk structure now since the vdev now
* owns this one.
*/
zdsk = copy_dsk(zdsk);
}
break;
}
}
#endif /* LOADER_GELI_SUPPORT */
}
}
int int
main(void) main(void)
{ {
dnode_phys_t dn; unsigned i;
off_t off; int auto_boot, fd, nextboot = 0;
struct zfsdsk *zdsk; struct disk_devdesc devdesc;
int autoboot, i;
int nextboot;
int rc;
dmadat = (void *)(roundup2(__base + (int32_t)&_end, 0x10000) - __base);
bios_getmem(); bios_getmem();
if (high_heap_size > 0) { if (high_heap_size > 0) {
heap_end = PTOV(high_heap_base + high_heap_size); heap_top = PTOV(high_heap_base + high_heap_size);
heap_next = PTOV(high_heap_base); heap_bottom = PTOV(high_heap_base);
} else { } else {
heap_next = (char *)dmadat + sizeof(*dmadat); heap_bottom = (char *)
heap_end = (char *)PTOV(bios_basemem); (roundup2(__base + (int32_t)&_end, 0x10000) - __base);
heap_top = (char *)PTOV(bios_basemem);
} }
setheap(heap_next, heap_end); setheap(heap_bottom, heap_top);
zdsk = calloc(1, sizeof(struct zfsdsk)); /*
zdsk->dsk.drive = *(uint8_t *)PTOV(ARGS); * Initialise the block cache. Set the upper limit.
zdsk->dsk.type = zdsk->dsk.drive & DRV_HARD ? TYPE_AD : TYPE_FD; */
zdsk->dsk.unit = zdsk->dsk.drive & DRV_MASK; bcache_init(32768, 512);
zdsk->dsk.slice = *(uint8_t *)PTOV(ARGS + 1) + 1;
zdsk->dsk.part = 0;
zdsk->dsk.start = 0;
zdsk->dsk.size = drvsize_ext(zdsk);
archsw.arch_autoload = NULL;
archsw.arch_getdev = i386_getdev;
archsw.arch_copyin = NULL;
archsw.arch_copyout = NULL;
archsw.arch_readin = NULL;
archsw.arch_isainb = NULL;
archsw.arch_isaoutb = NULL;
archsw.arch_zfs_probe = i386_zfs_probe;
bootinfo.bi_version = BOOTINFO_VERSION; bootinfo.bi_version = BOOTINFO_VERSION;
bootinfo.bi_size = sizeof(bootinfo); bootinfo.bi_size = sizeof(bootinfo);
bootinfo.bi_basemem = bios_basemem / 1024; bootinfo.bi_basemem = bios_basemem / 1024;
bootinfo.bi_extmem = bios_extmem / 1024; bootinfo.bi_extmem = bios_extmem / 1024;
bootinfo.bi_memsizes_valid++; bootinfo.bi_memsizes_valid++;
bootinfo.bi_bios_dev = zdsk->dsk.drive; bootinfo.bi_bios_dev = *(uint8_t *)PTOV(ARGS);
bootdev = MAKEBOOTDEV(dev_maj[zdsk->dsk.type], /* Set up fall back device name. */
zdsk->dsk.slice, zdsk->dsk.unit, zdsk->dsk.part); snprintf(boot_devname, sizeof (boot_devname), "disk%d:",
bd_bios2unit(bootinfo.bi_bios_dev));
/* Process configuration file */ for (i = 0; devsw[i] != NULL; i++)
if (devsw[i]->dv_init != NULL)
(devsw[i]->dv_init)();
autoboot = 1; disk_parsedev(&devdesc, boot_devname + 4, NULL);
zfs_init(); bootdev = MAKEBOOTDEV(dev_maj[DEVT_DISK], devdesc.d_slice + 1,
devdesc.dd.d_unit,
devdesc.d_partition >= 0 ? devdesc.d_partition : 0xff);
/* /*
* Probe the boot drive first - we will try to boot from whatever * zfs_fmtdev() can be called only after dv_init
* pool we find on that drive.
*/ */
probe_drive(zdsk); if (bdev != NULL && bdev->dd.d_dev->dv_type == DEVT_ZFS) {
/* set up proper device name string for ZFS */
/* strncpy(boot_devname, zfs_fmtdev(bdev), sizeof (boot_devname));
* Probe the rest of the drives that the bios knows about. This if (zfs_nextboot(bdev, cmd, sizeof(cmd)) == 0) {
* will find any other available pools and it may fill in missing
* vdevs for the boot pool.
*/
#ifndef VIRTUALBOX
for (i = 0; i < *(unsigned char *)PTOV(BIOS_NUMDRIVES); i++)
#else
for (i = 0; i < MAXBDDEV; i++)
#endif
{
if ((i | DRV_HARD) == *(uint8_t *)PTOV(ARGS))
continue;
if (!int13probe(i | DRV_HARD))
break;
zdsk = calloc(1, sizeof(struct zfsdsk));
zdsk->dsk.drive = i | DRV_HARD;
zdsk->dsk.type = zdsk->dsk.drive & TYPE_AD;
zdsk->dsk.unit = i;
zdsk->dsk.slice = 0;
zdsk->dsk.part = 0;
zdsk->dsk.start = 0;
zdsk->dsk.size = drvsize_ext(zdsk);
probe_drive(zdsk);
}
/*
* The first discovered pool, if any, is the pool.
*/
spa = spa_get_primary();
if (!spa) {
printf("%s: No ZFS pools located, can't boot\n", BOOTPROG);
for (;;)
;
}
primary_spa = spa;
primary_vdev = spa_get_primary_vdev(spa);
nextboot = 0;
rc = vdev_read_pad2(primary_vdev, cmd, sizeof(cmd));
if (vdev_clear_pad2(primary_vdev))
printf("failed to clear pad2 area of primary vdev\n");
if (rc == 0) {
if (*cmd) {
/*
* We could find an old-style ZFS Boot Block header
* here. Simply ignore it.
*/
if (*(uint64_t *)cmd != 0x2f5b007b10c) {
/*
* Note that parse() is destructive to cmd[]
* and we also want to honor RBX_QUIET option
* that could be present in cmd[].
*/
nextboot = 1; nextboot = 1;
memcpy(cmddup, cmd, sizeof(cmd)); memcpy(cmddup, cmd, sizeof(cmd));
if (parse_cmd()) { if (parse_cmd()) {
printf("failed to parse pad2 area of " if (!OPT_CHECK(RBX_QUIET))
"primary vdev\n"); printf("failed to parse pad2 area\n");
reboot(); exit(0);
} }
if (!OPT_CHECK(RBX_QUIET)) if (!OPT_CHECK(RBX_QUIET))
printf("zfs nextboot: %s\n", cmddup); printf("zfs nextboot: %s\n", cmddup);
}
/* Do not process this command twice */ /* Do not process this command twice */
*cmd = 0; *cmd = 0;
} }
} else }
printf("failed to read pad2 area of primary vdev\n");
/* Mount ZFS only if it's not already mounted via nextboot parsing. */ /* now make sure we have bdev on all cases */
if (zfsmount.spa == NULL && free(bdev);
(zfs_spa_init(spa) != 0 || zfs_mount(spa, 0, &zfsmount) != 0)) { i386_getdev((void **)&bdev, boot_devname, NULL);
printf("%s: failed to mount default pool %s\n",
BOOTPROG, spa->spa_name); env_setenv("currdev", EV_VOLATILE, boot_devname, i386_setcurrdev,
autoboot = 0; env_nounset);
} else if (zfs_lookup(&zfsmount, PATH_CONFIG, &dn) == 0 ||
zfs_lookup(&zfsmount, PATH_DOTCONFIG, &dn) == 0) { /* Process configuration file */
off = 0; auto_boot = 1;
zfs_read(spa, &dn, &off, cmd, sizeof(cmd));
fd = open(PATH_CONFIG, O_RDONLY);
if (fd == -1)
fd = open(PATH_DOTCONFIG, O_RDONLY);
if (fd != -1) {
read(fd, cmd, sizeof (cmd));
close(fd);
} }
if (*cmd) { if (*cmd) {
/* /*
* Note that parse_cmd() is destructive to cmd[] and we also * Note that parse_cmd() is destructive to cmd[] and we also
* want to honor RBX_QUIET option that could be present in * want to honor RBX_QUIET option that could be present in
* cmd[]. * cmd[].
*/ */
memcpy(cmddup, cmd, sizeof(cmd)); memcpy(cmddup, cmd, sizeof(cmd));
if (parse_cmd()) if (parse_cmd())
autoboot = 0; auto_boot = 0;
if (!OPT_CHECK(RBX_QUIET)) if (!OPT_CHECK(RBX_QUIET))
printf("%s: %s\n", PATH_CONFIG, cmddup); printf("%s: %s\n", PATH_CONFIG, cmddup);
/* Do not process this command twice */ /* Do not process this command twice */
*cmd = 0; *cmd = 0;
} }
/* Do not risk waiting at the prompt forever. */ /* Do not risk waiting at the prompt forever. */
if (nextboot && !autoboot) if (nextboot && !auto_boot)
reboot(); exit(0);
if (autoboot && !*kname) { if (auto_boot && !*kname) {
/* /*
* Iterate through the list of loader and kernel paths, * Iterate through the list of loader and kernel paths,
* trying to load. If interrupted by a keypress, or in case of * trying to load. If interrupted by a keypress, or in case of
* failure, drop the user to the boot2 prompt. * failure, drop the user to the boot2 prompt.
*/ */
for (i = 0; i < nitems(loadpath); i++) { for (i = 0; i < nitems(loadpath); i++) {
memcpy(kname, loadpath[i].p, loadpath[i].len); memcpy(kname, loadpath[i].p, loadpath[i].len);
if (keyhit(3)) if (keyhit(3))
break; break;
load(); load();
} }
} }
/* Present the user with the boot2 prompt. */ /* Present the user with the boot2 prompt. */
for (;;) { for (;;) {
if (!autoboot || !OPT_CHECK(RBX_QUIET)) { if (!auto_boot || !OPT_CHECK(RBX_QUIET)) {
printf("\nFreeBSD/x86 boot\n"); printf("\nFreeBSD/x86 boot\n");
if (zfs_rlookup(spa, zfsmount.rootobj, rootname) != 0) printf("Default: %s%s\nboot: ", boot_devname, kname);
printf("Default: %s/<0x%llx>:%s\n"
"boot: ",
spa->spa_name, zfsmount.rootobj, kname);
else if (rootname[0] != '\0')
printf("Default: %s/%s:%s\n"
"boot: ",
spa->spa_name, rootname, kname);
else
printf("Default: %s:%s\n"
"boot: ",
spa->spa_name, kname);
} }
if (ioctrl & IO_SERIAL) if (ioctrl & IO_SERIAL)
sio_flush(); sio_flush();
if (!autoboot || keyhit(5)) if (!auto_boot || keyhit(5))
getstr(cmd, sizeof(cmd)); getstr(cmd, sizeof(cmd));
else if (!autoboot || !OPT_CHECK(RBX_QUIET)) else if (!auto_boot || !OPT_CHECK(RBX_QUIET))
putchar('\n'); putchar('\n');
autoboot = 0; auto_boot = 0;
if (parse_cmd()) if (parse_cmd())
putchar('\a'); putchar('\a');
else else
load(); load();
} }
} }
/* XXX - Needed for btxld to link the boot2 binary; do not remove. */ /* XXX - Needed for btxld to link the boot2 binary; do not remove. */
void void
exit(int x) exit(int x)
{ {
__exit(x); __exit(x);
} }
void
reboot(void)
{
__exit(0);
}
static void static void
load(void) load(void)
{ {
union { union {
struct exec ex; struct exec ex;
Elf32_Ehdr eh; Elf32_Ehdr eh;
} hdr; } hdr;
static Elf32_Phdr ep[2]; static Elf32_Phdr ep[2];
static Elf32_Shdr es[2]; static Elf32_Shdr es[2];
caddr_t p; caddr_t p;
dnode_phys_t dn;
off_t off;
uint32_t addr, x; uint32_t addr, x;
int fmt, i, j; int fd, fmt, i, j;
ssize_t size;
if (zfs_lookup(&zfsmount, kname, &dn)) { if ((fd = open(kname, O_RDONLY)) == -1) {
printf("\nCan't find %s\n", kname); printf("\nCan't find %s\n", kname);
return; return;
} }
off = 0;
if (xfsread(&dn, &off, &hdr, sizeof(hdr))) size = sizeof(hdr);
if (read(fd, &hdr, sizeof (hdr)) != size) {
close(fd);
return; return;
if (N_GETMAGIC(hdr.ex) == ZMAGIC) }
if (N_GETMAGIC(hdr.ex) == ZMAGIC) {
fmt = 0; fmt = 0;
else if (IS_ELF(hdr.eh)) } else if (IS_ELF(hdr.eh)) {
fmt = 1; fmt = 1;
else { } else {
printf("Invalid %s\n", "format"); printf("Invalid %s\n", "format");
close(fd);
return; return;
} }
if (fmt == 0) { if (fmt == 0) {
addr = hdr.ex.a_entry & 0xffffff; addr = hdr.ex.a_entry & 0xffffff;
p = PTOV(addr); p = PTOV(addr);
off = PAGE_SIZE; lseek(fd, PAGE_SIZE, SEEK_SET);
if (xfsread(&dn, &off, p, hdr.ex.a_text)) size = hdr.ex.a_text;
if (read(fd, p, hdr.ex.a_text) != size) {
close(fd);
return; return;
}
p += roundup2(hdr.ex.a_text, PAGE_SIZE); p += roundup2(hdr.ex.a_text, PAGE_SIZE);
if (xfsread(&dn, &off, p, hdr.ex.a_data)) size = hdr.ex.a_data;
if (read(fd, p, hdr.ex.a_data) != size) {
close(fd);
return; return;
}
p += hdr.ex.a_data + roundup2(hdr.ex.a_bss, PAGE_SIZE); p += hdr.ex.a_data + roundup2(hdr.ex.a_bss, PAGE_SIZE);
bootinfo.bi_symtab = VTOP(p); bootinfo.bi_symtab = VTOP(p);
memcpy(p, &hdr.ex.a_syms, sizeof(hdr.ex.a_syms)); memcpy(p, &hdr.ex.a_syms, sizeof(hdr.ex.a_syms));
p += sizeof(hdr.ex.a_syms); p += sizeof(hdr.ex.a_syms);
if (hdr.ex.a_syms) { if (hdr.ex.a_syms) {
if (xfsread(&dn, &off, p, hdr.ex.a_syms)) size = hdr.ex.a_syms;
if (read(fd, p, hdr.ex.a_syms) != size) {
close(fd);
return; return;
}
p += hdr.ex.a_syms; p += hdr.ex.a_syms;
if (xfsread(&dn, &off, p, sizeof(int))) size = sizeof (int);
if (read(fd, p, sizeof (int)) != size) {
close(fd);
return; return;
}
x = *(uint32_t *)p; x = *(uint32_t *)p;
p += sizeof(int); p += sizeof(int);
x -= sizeof(int); x -= sizeof(int);
if (xfsread(&dn, &off, p, x)) size = x;
if (read(fd, p, x) != size) {
close(fd);
return; return;
}
p += x; p += x;
} }
} else { } else {
off = hdr.eh.e_phoff; lseek(fd, hdr.eh.e_phoff, SEEK_SET);
for (j = i = 0; i < hdr.eh.e_phnum && j < 2; i++) { for (j = i = 0; i < hdr.eh.e_phnum && j < 2; i++) {
if (xfsread(&dn, &off, ep + j, sizeof(ep[0]))) size = sizeof (ep[0]);
if (read(fd, ep + j, sizeof (ep[0])) != size) {
close(fd);
return; return;
}
if (ep[j].p_type == PT_LOAD) if (ep[j].p_type == PT_LOAD)
j++; j++;
} }
for (i = 0; i < 2; i++) { for (i = 0; i < 2; i++) {
p = PTOV(ep[i].p_paddr & 0xffffff); p = PTOV(ep[i].p_paddr & 0xffffff);
off = ep[i].p_offset; lseek(fd, ep[i].p_offset, SEEK_SET);
if (xfsread(&dn, &off, p, ep[i].p_filesz)) size = ep[i].p_filesz;
if (read(fd, p, ep[i].p_filesz) != size) {
close(fd);
return; return;
} }
}
p += roundup2(ep[1].p_memsz, PAGE_SIZE); p += roundup2(ep[1].p_memsz, PAGE_SIZE);
bootinfo.bi_symtab = VTOP(p); bootinfo.bi_symtab = VTOP(p);
if (hdr.eh.e_shnum == hdr.eh.e_shstrndx + 3) { if (hdr.eh.e_shnum == hdr.eh.e_shstrndx + 3) {
off = hdr.eh.e_shoff + sizeof(es[0]) * lseek(fd, hdr.eh.e_shoff +
(hdr.eh.e_shstrndx + 1); sizeof (es[0]) * (hdr.eh.e_shstrndx + 1),
if (xfsread(&dn, &off, &es, sizeof(es))) SEEK_SET);
size = sizeof(es);
if (read(fd, &es, sizeof (es)) != size) {
close(fd);
return; return;
}
for (i = 0; i < 2; i++) { for (i = 0; i < 2; i++) {
memcpy(p, &es[i].sh_size, memcpy(p, &es[i].sh_size,
sizeof(es[i].sh_size)); sizeof(es[i].sh_size));
p += sizeof(es[i].sh_size); p += sizeof(es[i].sh_size);
off = es[i].sh_offset; lseek(fd, es[i].sh_offset, SEEK_SET);
if (xfsread(&dn, &off, p, es[i].sh_size)) size = es[i].sh_size;
if (read(fd, p, es[i].sh_size) != size) {
close(fd);
return; return;
}
p += es[i].sh_size; p += es[i].sh_size;
} }
} }
addr = hdr.eh.e_entry & 0xffffff; addr = hdr.eh.e_entry & 0xffffff;
} }
close(fd);
bootinfo.bi_esymtab = VTOP(p); bootinfo.bi_esymtab = VTOP(p);
bootinfo.bi_kernelname = VTOP(kname); bootinfo.bi_kernelname = VTOP(kname);
zfsargs.size = sizeof(zfsargs);
zfsargs.pool = zfsmount.spa->spa_guid;
zfsargs.root = zfsmount.rootobj;
zfsargs.primary_pool = primary_spa->spa_guid;
#ifdef LOADER_GELI_SUPPORT #ifdef LOADER_GELI_SUPPORT
explicit_bzero(gelipw, sizeof(gelipw)); explicit_bzero(gelipw, sizeof(gelipw));
#endif
if (bdev->dd.d_dev->dv_type == DEVT_ZFS) {
zfsargs.size = sizeof(zfsargs);
zfsargs.pool = bdev->d_kind.zfs.pool_guid;
zfsargs.root = bdev->d_kind.zfs.root_guid;
#ifdef LOADER_GELI_SUPPORT
export_geli_boot_data(&zfsargs.gelidata); export_geli_boot_data(&zfsargs.gelidata);
#endif #endif
if (primary_vdev != NULL)
zfsargs.primary_vdev = primary_vdev->v_guid;
else
printf("failed to detect primary vdev\n");
/* /*
* Note that the zfsargs struct is passed by value, not by pointer. * Note that the zfsargs struct is passed by value, not by
* Code in btxldr.S copies the values from the entry stack to a fixed * pointer. Code in btxldr.S copies the values from the entry
* location within loader(8) at startup due to the presence of * stack to a fixed location within loader(8) at startup due
* KARGS_FLAGS_EXTARG. * to the presence of KARGS_FLAGS_EXTARG.
*/ */
__exec((caddr_t)addr, RB_BOOTINFO | (opts & RBX_MASK), __exec((caddr_t)addr, RB_BOOTINFO | (opts & RBX_MASK),
bootdev, bootdev,
KARGS_FLAGS_ZFS | KARGS_FLAGS_EXTARG, KARGS_FLAGS_ZFS | KARGS_FLAGS_EXTARG,
(uint32_t)spa->spa_guid, (uint32_t)bdev->d_kind.zfs.pool_guid,
(uint32_t)(spa->spa_guid >> 32), (uint32_t)(bdev->d_kind.zfs.pool_guid >> 32),
VTOP(&bootinfo), VTOP(&bootinfo),
zfsargs); zfsargs);
} else {
#ifdef LOADER_GELI_SUPPORT
geliargs.size = sizeof(geliargs);
export_geli_boot_data(&geliargs.gelidata);
#endif
/*
* Note that the geliargs struct is passed by value, not by
* pointer. Code in btxldr.S copies the values from the entry
* stack to a fixed location within loader(8) at startup due
* to the presence of the KARGS_FLAGS_EXTARG flag.
*/
__exec((caddr_t)addr, RB_BOOTINFO | (opts & RBX_MASK),
bootdev,
#ifdef LOADER_GELI_SUPPORT
KARGS_FLAGS_GELI | KARGS_FLAGS_EXTARG, 0, 0,
VTOP(&bootinfo), geliargs
#else
0, 0, 0, VTOP(&bootinfo)
#endif
);
} }
}
static int static int
zfs_mount_ds(char *dsname) mount_root(char *arg)
{ {
uint64_t newroot; char *root;
spa_t *newspa; struct i386_devdesc *ddesc;
char *q; uint8_t part;
q = strchr(dsname, '/'); if (asprintf(&root, "%s:", arg) < 0)
if (q) return (1);
*q++ = '\0';
newspa = spa_find_by_name(dsname); if (i386_getdev((void **)&ddesc, root, NULL)) {
if (newspa == NULL) { free(root);
printf("\nCan't find ZFS pool %s\n", dsname); return (1);
return (-1);
} }
if (zfs_spa_init(newspa)) /* we should have new device descriptor, free old and replace it. */
return (-1); free(bdev);
bdev = ddesc;
newroot = 0; if (bdev->dd.d_dev->dv_type == DEVT_DISK) {
if (q) { if (bdev->d_kind.biosdisk.partition == -1)
if (zfs_lookup_dataset(newspa, q, &newroot)) { part = 0xff;
printf("\nCan't find dataset %s in ZFS pool %s\n", else
q, newspa->spa_name); part = bdev->d_kind.biosdisk.partition;
return (-1); bootdev = MAKEBOOTDEV(dev_maj[bdev->dd.d_dev->dv_type],
bdev->d_kind.biosdisk.slice + 1,
bdev->dd.d_unit, part);
bootinfo.bi_bios_dev = bd_unit2bios(bdev);
} }
strncpy(boot_devname, root, sizeof (boot_devname));
setenv("currdev", root, 1);
free(root);
return (0);
} }
if (zfs_mount(newspa, newroot, &zfsmount)) {
printf("\nCan't mount ZFS dataset\n"); static void
return (-1); fs_list(char *arg)
{
int fd;
struct dirent *d;
char line[80];
fd = open(arg, O_RDONLY);
if (fd < 0)
return;
pager_open();
while ((d = readdirfd(fd)) != NULL) {
sprintf(line, "%s\n", d->d_name);
if (pager_output(line))
break;
} }
spa = newspa; pager_close();
return (0); close(fd);
} }
static int static int
parse_cmd(void) parse_cmd(void)
{ {
char *arg = cmd; char *arg = cmd;
char *ep, *p, *q; char *ep, *p, *q;
const char *cp; const char *cp;
char line[80];
int c, i, j; int c, i, j;
while ((c = *arg++)) { while ((c = *arg++)) {
if (c == ' ' || c == '\t' || c == '\n') if (c == ' ' || c == '\t' || c == '\n')
continue; continue;
for (p = arg; *p && *p != '\n' && *p != ' ' && *p != '\t'; p++) for (p = arg; *p && *p != '\n' && *p != ' ' && *p != '\t'; p++)
; ;
ep = p; ep = p;
Show All 32 Lines if (c == '-') {
} }
ioctrl = OPT_CHECK(RBX_DUAL) ? (IO_SERIAL|IO_KEYBOARD) : ioctrl = OPT_CHECK(RBX_DUAL) ? (IO_SERIAL|IO_KEYBOARD) :
OPT_CHECK(RBX_SERIAL) ? IO_SERIAL : IO_KEYBOARD; OPT_CHECK(RBX_SERIAL) ? IO_SERIAL : IO_KEYBOARD;
if (ioctrl & IO_SERIAL) { if (ioctrl & IO_SERIAL) {
if (sio_init(115200 / comspeed) != 0) if (sio_init(115200 / comspeed) != 0)
ioctrl &= ~IO_SERIAL; ioctrl &= ~IO_SERIAL;
} }
} if (c == '?') { } if (c == '?') {
dnode_phys_t dn; printf("\n");
if (*arg == '\0')
if (zfs_lookup(&zfsmount, arg, &dn) == 0) { arg = (char *)"/";
zap_list(spa, &dn); fs_list(arg);
} zfs_list(arg);
return (-1); return (-1);
} else { } else {
char *ptr;
printf("\n");
arg--; arg--;
/* /*
* Report pool status if the comment is 'status'. Lets * Report pool status if the comment is 'status'. Lets
* hope no-one wants to load /status as a kernel. * hope no-one wants to load /status as a kernel.
*/ */
if (strcmp(arg, "status") == 0) { if (strcmp(arg, "status") == 0) {
spa_all_status(); pager_open();
for (i = 0; devsw[i] != NULL; i++) {
if (devsw[i]->dv_print != NULL) {
if (devsw[i]->dv_print(1))
break;
} else {
snprintf(line, sizeof(line),
"%s: (unknown)\n",
devsw[i]->dv_name);
if (pager_output(line))
break;
}
}
pager_close();
return (-1); return (-1);
} }
/* /*
* If there is "zfs:" prefix simply ignore it. * If there is "zfs:" prefix simply ignore it.
*/ */
if (strncmp(arg, "zfs:", 4) == 0) ptr = arg;
arg += 4; if (strncmp(ptr, "zfs:", 4) == 0)
ptr += 4;
/* /*
* If there is a colon, switch pools. * If there is a colon, switch pools.
*/ */
q = strchr(arg, ':'); q = strchr(ptr, ':');
if (q) { if (q) {
*q++ = '\0'; *q++ = '\0';
if (zfs_mount_ds(arg) != 0) if (mount_root(arg) != 0) {
return (-1); return (-1);
}
arg = q; arg = q;
} }
if ((i = ep - arg)) { if ((i = ep - arg)) {
if ((size_t)i >= sizeof(kname)) if ((size_t)i >= sizeof(kname))
return (-1); return (-1);
memcpy(kname, arg, i + 1); memcpy(kname, arg, i + 1);
} }
} }
arg = p; arg = p;
} }
return (0); return (0);
}
/*
* Probe all disks to discover ZFS pools. The idea is to walk all possible
* disk devices, however, we also need to identify possible boot pool.
* For boot pool detection we have boot disk passed us from BIOS, recorded
* in bootinfo.bi_bios_dev.
*/
static void
i386_zfs_probe(void)
{
char devname[32];
int boot_unit;
struct i386_devdesc dev;
uint64_t pool_guid = 0;
dev.dd.d_dev = &bioshd;
/* Translate bios dev to our unit number. */
boot_unit = bd_bios2unit(bootinfo.bi_bios_dev);
/*
* Open all the disks we can find and see if we can reconstruct
* ZFS pools from them.
*/
for (dev.dd.d_unit = 0; bd_unit2bios(&dev) >= 0; dev.dd.d_unit++) {
snprintf(devname, sizeof (devname), "%s%d:", bioshd.dv_name,
dev.dd.d_unit);
/* If this is not boot disk, use generic probe. */
if (dev.dd.d_unit != boot_unit)
zfs_probe_dev(devname, NULL);
else
zfs_probe_dev(devname, &pool_guid);
if (pool_guid != 0 && bdev == NULL) {
bdev = malloc(sizeof (struct i386_devdesc));
bzero(bdev, sizeof (struct i386_devdesc));
bdev->dd.d_dev = &zfs_dev;
bdev->d_kind.zfs.pool_guid = pool_guid;
}
}
} }