Page MenuHomeFreeBSD
Differential D10591 Diff 28001 head/sys/boot/i386/zfsboot/zfsboot.c

Changeset View

Standalone View

View Options

head/sys/boot/i386/zfsboot/zfsboot.c

Show All 33 Lines
#include <a.out.h> #include <a.out.h>
#include <btxv86.h> #include <btxv86.h>
#include "lib.h" #include "lib.h"
#include "rbx.h" #include "rbx.h"
#include "drv.h" #include "drv.h"
#include "edd.h"
#include "util.h" #include "util.h"
#include "cons.h" #include "cons.h"
#include "bootargs.h" #include "bootargs.h"
#include "paths.h" #include "paths.h"
#include "libzfs.h" #include "libzfs.h"
#define ARGS 0x900 #define ARGS 0x900
▲ Show 20 Lines • Show All 70 Lines • ▼ Show 20 Lines
void exit(int); void exit(int);
void reboot(void); void reboot(void);
static void load(void); static void load(void);
static int parse_cmd(void); static int parse_cmd(void);
static void bios_getmem(void); static void bios_getmem(void);
void *malloc(size_t n); void *malloc(size_t n);
void free(void *ptr); void free(void *ptr);
int main(void);
void * void *
malloc(size_t n) malloc(size_t n)
{ {
char *p = heap_next; char *p = heap_next;
if (p + n > heap_end) { if (p + n > heap_end) {
printf("malloc failure\n"); printf("malloc failure\n");
for (;;) for (;;)
▲ Show 20 Lines • Show All 328 Lines • ▼ Show 20 Linescopy_dsk(struct dsk *dsk)
struct dsk *newdsk; struct dsk *newdsk;
newdsk = malloc(sizeof(struct dsk)); newdsk = malloc(sizeof(struct dsk));
*newdsk = *dsk; *newdsk = *dsk;
return (newdsk); return (newdsk);
} }
/* /*
* 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 dsk *dskp)
{
uint64_t size, tmp;
int cyl, hds, sec;
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 "layered" ioctl to read disk/partition size. Unfortunately
* the zfsboot case is hardest, because we do not have full software * the zfsboot case is hardest, because we do not have full software
* stack available, so we need to do some manual work here. * stack available, so we need to do some manual work here.
*/ */
uint64_t uint64_t
ldi_get_size(void *priv) ldi_get_size(void *priv)
{ {
struct dsk *dskp = priv; struct dsk *dskp = priv;
uint64_t size = dskp->size; uint64_t size = dskp->size;
if (dskp->start == 0) if (dskp->start == 0)
size = drvsize(dskp); size = drvsize_ext(dskp);
return (size * DEV_BSIZE); return (size * DEV_BSIZE);
} }
static void static void
probe_drive(struct dsk *dsk) probe_drive(struct dsk *dsk)
{ {
#ifdef GPT #ifdef GPT
Show All 18 Lines
#ifdef LOADER_GELI_SUPPORT #ifdef LOADER_GELI_SUPPORT
/* /*
* Taste the disk, if it is GELI encrypted, decrypt it and check to see if * Taste the disk, if it is GELI encrypted, decrypt it and check to see if
* it is a usable vdev then. Otherwise dig * it is a usable vdev then. Otherwise dig
* out the partition table and probe each slice/partition * out the partition table and probe each slice/partition
* in turn for a vdev or GELI encrypted vdev. * in turn for a vdev or GELI encrypted vdev.
*/ */
elba = drvsize(dsk); elba = drvsize_ext(dsk);
if (elba > 0) { if (elba > 0) {
elba--; elba--;
} }
if (geli_taste(vdev_read, dsk, elba) == 0) { if (geli_taste(vdev_read, dsk, elba) == 0) {
if (geli_havekey(dsk) == 0 || geli_passphrase(&gelipw, dsk->unit, if (geli_havekey(dsk) == 0 || geli_passphrase(&gelipw, dsk->unit,
':', 0, dsk) == 0) { ':', 0, dsk) == 0) {
if (vdev_probe(vdev_read, dsk, NULL) == 0) { if (vdev_probe(vdev_read, dsk, NULL) == 0) {
return; return;
▲ Show 20 Lines • Show All 573 Lines • Show Last 20 Lines