/* $NetBSD: biosdisk.c,v 1.61 2024/01/06 21:26:43 mlelstv Exp $ */
/*
* Copyright (c) 1996, 1998
* Matthias Drochner. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
/*
* raw BIOS disk device for libsa.
* needs lowlevel parts from bios_disk.S and biosdisk_ll.c
* partly from netbsd:sys/arch/i386/boot/disk.c
* no bad144 handling!
*
* A lot of this must match sys/kern/subr_disk_mbr.c
*/
/*
* Ported to boot 386BSD by Julian Elischer (
[email protected]) Sept 1992
*
* Mach Operating System
* Copyright (c) 1992, 1991 Carnegie Mellon University
* All Rights Reserved.
*
* Permission to use, copy, modify and distribute this software and its
* documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or
[email protected]
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie Mellon
* the rights to redistribute these changes.
*/
#if !defined(NO_DISKLABEL) || !defined(NO_GPT)
#define FSTYPENAMES
#endif
#include <lib/libkern/libkern.h>
#include <lib/libsa/stand.h>
#include <sys/types.h>
#include <sys/md5.h>
#include <sys/param.h>
#include <sys/disklabel.h>
#include <sys/disklabel_gpt.h>
#include <sys/uuid.h>
#include <fs/cd9660/iso.h>
#include <fs/unicode.h>
#include <lib/libsa/saerrno.h>
#include <machine/cpu.h>
#include "libi386.h"
#include "biosdisk_ll.h"
#include "biosdisk.h"
#ifdef _STANDALONE
#include "bootinfo.h"
#endif
#ifndef NO_GPT
#define MAXDEVNAME 39 /* "NAME=" + 34 char part_name */
#else
#define MAXDEVNAME 16
#endif
#ifndef BIOSDISK_BUFSIZE
#define BIOSDISK_BUFSIZE 2048 /* must be large enough for a CD sector */
#endif
#define BIOSDISKNPART 26
struct biosdisk {
struct biosdisk_ll ll;
daddr_t boff;
daddr_t size;
char buf[BIOSDISK_BUFSIZE];
#if !defined(NO_DISKLABEL) || !defined(NO_GPT)
struct biosdisk_partition part[BIOSDISKNPART];
#endif
};
#include <dev/raidframe/raidframevar.h>
#define RF_COMPONENT_INFO_OFFSET 16384 /* from sys/dev/raidframe/rf_netbsdkintf.c */
#define RF_COMPONENT_LABEL_VERSION 2 /* from <dev/raidframe/rf_raid.h> */
#define RAIDFRAME_NDEV 16 /* abitrary limit to 15 raidframe devices */
struct raidframe {
int last_unit;
int serial;
int biosdev;
int parent_part;
#ifndef NO_GPT
char parent_name[MAXDEVNAME + 1];
#endif
daddr_t offset;
daddr_t size;
};
#ifndef NO_GPT
const struct uuid GET_nbsd_raid = GPT_ENT_TYPE_NETBSD_RAIDFRAME;
const struct uuid GET_nbsd_ffs = GPT_ENT_TYPE_NETBSD_FFS;
const struct uuid GET_nbsd_lfs = GPT_ENT_TYPE_NETBSD_LFS;
const struct uuid GET_nbsd_swap = GPT_ENT_TYPE_NETBSD_SWAP;
const struct uuid GET_nbsd_ccd = GPT_ENT_TYPE_NETBSD_CCD;
const struct uuid GET_nbsd_cgd = GPT_ENT_TYPE_NETBSD_CGD;
const struct uuid GET_efi = GPT_ENT_TYPE_EFI;
const struct uuid GET_mbr = GPT_ENT_TYPE_MBR;
const struct uuid GET_fbsd = GPT_ENT_TYPE_FREEBSD;
const struct uuid GET_fbsd_swap = GPT_ENT_TYPE_FREEBSD_SWAP;
const struct uuid GET_fbsd_ufs = GPT_ENT_TYPE_FREEBSD_UFS;
const struct uuid GET_fbsd_vinum = GPT_ENT_TYPE_FREEBSD_VINUM;
const struct uuid GET_fbsd_zfs = GPT_ENT_TYPE_FREEBSD_ZFS;
const struct uuid GET_ms_rsvd = GPT_ENT_TYPE_MS_RESERVED;
const struct uuid GET_ms_basic_data = GPT_ENT_TYPE_MS_BASIC_DATA;
const struct uuid GET_ms_ldm_metadata = GPT_ENT_TYPE_MS_LDM_METADATA;
const struct uuid GET_ms_ldm_data = GPT_ENT_TYPE_MS_LDM_DATA;
const struct uuid GET_linux_data = GPT_ENT_TYPE_LINUX_DATA;
const struct uuid GET_linux_raid = GPT_ENT_TYPE_LINUX_RAID;
const struct uuid GET_linux_swap = GPT_ENT_TYPE_LINUX_SWAP;
const struct uuid GET_linux_lvm = GPT_ENT_TYPE_LINUX_LVM;
const struct uuid GET_apple_hfs = GPT_ENT_TYPE_APPLE_HFS;
const struct uuid GET_apple_ufs = GPT_ENT_TYPE_APPLE_UFS;
const struct uuid GET_bios = GPT_ENT_TYPE_BIOS;
const struct gpt_part gpt_parts[] = {
{ &GET_nbsd_raid, "NetBSD RAID" },
{ &GET_nbsd_ffs, "NetBSD FFS" },
{ &GET_nbsd_lfs, "NetBSD LFS" },
{ &GET_nbsd_swap, "NetBSD Swap" },
{ &GET_nbsd_ccd, "NetBSD ccd" },
{ &GET_nbsd_cgd, "NetBSD cgd" },
{ &GET_efi, "EFI System" },
{ &GET_mbr, "MBR" },
{ &GET_fbsd, "FreeBSD" },
{ &GET_fbsd_swap, "FreeBSD Swap" },
{ &GET_fbsd_ufs, "FreeBSD UFS" },
{ &GET_fbsd_vinum, "FreeBSD Vinum" },
{ &GET_fbsd_zfs, "FreeBSD ZFS" },
{ &GET_ms_rsvd, "Microsoft Reserved" },
{ &GET_ms_basic_data, "Microsoft Basic data" },
{ &GET_ms_ldm_metadata, "Microsoft LDM metadata" },
{ &GET_ms_ldm_data, "Microsoft LDM data" },
{ &GET_linux_data, "Linux data" },
{ &GET_linux_raid, "Linux RAID" },
{ &GET_linux_swap, "Linux Swap" },
{ &GET_linux_lvm, "Linux LVM" },
{ &GET_apple_hfs, "Apple HFS" },
{ &GET_apple_ufs, "Apple UFS" },
{ &GET_bios, "BIOS Boot (GRUB)" },
};
#endif /* NO_GPT */
struct btinfo_bootdisk bi_disk;
struct btinfo_bootwedge bi_wedge;
struct btinfo_rootdevice bi_root;
#define MBR_PARTS(buf) ((char *)(buf) + offsetof(struct mbr_sector, mbr_parts))
#ifndef devb2cdb
#define devb2cdb(bno) (((bno) * DEV_BSIZE) / ISO_DEFAULT_BLOCK_SIZE)
#endif
static void
dealloc_biosdisk(struct biosdisk *d)
{
#ifndef NO_GPT
int i;
for (i = 0; i < __arraycount(d->part); i++) {
if (d->part[i].part_name != NULL)
dealloc(d->part[i].part_name, BIOSDISK_PART_NAME_LEN);
}
#endif
dealloc(d, sizeof(*d));
return;
}
static struct biosdisk_partition *
copy_biosdisk_part(struct biosdisk *d)
{
struct biosdisk_partition *part;
part = alloc(sizeof(d->part));
if (part == NULL)
goto out;
memcpy(part, d->part, sizeof(d->part));
#ifndef NO_GPT
int i;
for (i = 0; i < __arraycount(d->part); i++) {
if (d->part[i].part_name != NULL) {
part[i].part_name = alloc(BIOSDISK_PART_NAME_LEN);
memcpy(part[i].part_name, d->part[i].part_name,
BIOSDISK_PART_NAME_LEN);
}
}
#endif
out:
return part;
}
int
biosdisk_strategy(void *devdata, int flag, daddr_t dblk, size_t size,
void *buf, size_t *rsize)
{
struct biosdisk *d;
int blks, frag;
if (flag != F_READ)
return EROFS;
d = (struct biosdisk *) devdata;
if (d->ll.type == BIOSDISK_TYPE_CD)
dblk = devb2cdb(dblk);
dblk += d->boff;
blks = size / d->ll.secsize;
if (blks && readsects(&d->ll, dblk, blks, buf, 0)) {
if (rsize)
*rsize = 0;
return EIO;
}
/* needed for CD */
frag = size % d->ll.secsize;
if (frag) {
if (readsects(&d->ll, dblk + blks, 1, d->buf, 0)) {
if (rsize)
*rsize = blks * d->ll.secsize;
return EIO;
}
memcpy(buf + blks * d->ll.secsize, d->buf, frag);
}
if (rsize)
*rsize = size;
return 0;
}
static struct biosdisk *
alloc_biosdisk(int biosdev)
{
struct biosdisk *d;
d = alloc(sizeof(*d));
if (d == NULL)
return NULL;
memset(d, 0, sizeof(*d));
d->ll.dev = biosdev;
if (set_geometry(&d->ll, NULL)) {
#ifdef DISK_DEBUG
printf("no geometry information\n");
#endif
dealloc_biosdisk(d);
return NULL;
}
return d;
}
#if !defined(NO_DISKLABEL) || !defined(NO_GPT)
static void
md5(void *hash, const void *data, size_t len)
{
MD5_CTX ctx;
MD5Init(&ctx);
MD5Update(&ctx, data, len);
MD5Final(hash, &ctx);
return;
}
#endif
#ifndef NO_GPT
bool
guid_is_nil(const struct uuid *u)
{
static const struct uuid nil = { .time_low = 0 };
return (memcmp(u, &nil, sizeof(*u)) == 0 ? true : false);
}
bool
guid_is_equal(const struct uuid *a, const struct uuid *b)
{
return (memcmp(a, b, sizeof(*a)) == 0 ? true : false);
}
static void
part_name_utf8(const uint16_t *utf16_src, size_t utf16_srclen,
char *utf8_dst, size_t utf8_dstlen)
{
char *c = utf8_dst;
size_t r = utf8_dstlen - 1;
size_t n;
int j;
if (utf8_dst == NULL)
return;
for (j = 0; j < utf16_srclen && utf16_src[j] != 0x0000; j++) {
n = wput_utf8(c, r, le16toh(utf16_src[j]));
if (n == 0)
break;
c += n; r -= n;
}
*c = '\0';
return;
}
static int
check_gpt(struct biosdisk *d, daddr_t rf_offset, daddr_t sector)
{
struct gpt_hdr gpth;
const struct gpt_ent *ep;
const struct uuid *u;
daddr_t entblk;
size_t size;
uint32_t crc;
int sectors;
int entries;
int entry;
int i, j;
/* read in gpt_hdr sector */
if (readsects(&d->ll, sector, 1, d->buf, 1)) {
#ifdef DISK_DEBUG
printf("Error reading GPT header at %"PRId64"\n", sector);
#endif
return EIO;
}
memcpy(&gpth, d->buf, sizeof(gpth));
if (memcmp(GPT_HDR_SIG, gpth.hdr_sig, sizeof(gpth.hdr_sig)))
return -1;
crc = gpth.hdr_crc_self;
gpth.hdr_crc_self = 0;
gpth.hdr_crc_self = crc32(0, (const void *)&gpth, GPT_HDR_SIZE);
if (gpth.hdr_crc_self != crc) {
return -1;
}
if (gpth.hdr_lba_self + rf_offset != sector)
return -1;
#ifdef _STANDALONE
bi_wedge.matchblk = sector;
bi_wedge.matchnblks = 1;
md5(bi_wedge.matchhash, d->buf, d->ll.secsize);
#endif
sectors = sizeof(d->buf)/d->ll.secsize; /* sectors per buffer */
entries = sizeof(d->buf)/gpth.hdr_entsz; /* entries per buffer */
entblk = gpth.hdr_lba_table + rf_offset;
crc = crc32(0, NULL, 0);
j = 0;
ep = (const struct gpt_ent *)d->buf;
for (entry = 0; entry < gpth.hdr_entries; entry += entries) {
size = MIN(sizeof(d->buf),
(gpth.hdr_entries - entry) * gpth.hdr_entsz);
entries = size / gpth.hdr_entsz;
sectors = roundup(size, d->ll.secsize) / d->ll.secsize;
if (readsects(&d->ll, entblk, sectors, d->buf, 1))
return -1;
entblk += sectors;
crc = crc32(crc, (const void *)d->buf, size);
for (i = 0; j < BIOSDISKNPART && i < entries; i++) {
u = (const struct uuid *)ep[i].ent_type;
if (!guid_is_nil(u)) {
d->part[j].offset = ep[i].ent_lba_start;
d->part[j].size = ep[i].ent_lba_end -
ep[i].ent_lba_start + 1;
if (guid_is_equal(u, &GET_nbsd_ffs))
d->part[j].fstype = FS_BSDFFS;
else if (guid_is_equal(u, &GET_nbsd_lfs))
d->part[j].fstype = FS_BSDLFS;
else if (guid_is_equal(u, &GET_nbsd_raid))
d->part[j].fstype = FS_RAID;
else if (guid_is_equal(u, &GET_nbsd_swap))
d->part[j].fstype = FS_SWAP;
else if (guid_is_equal(u, &GET_nbsd_ccd))
d->part[j].fstype = FS_CCD;
else if (guid_is_equal(u, &GET_nbsd_cgd))
d->part[j].fstype = FS_CGD;
else
d->part[j].fstype = FS_OTHER;
#ifndef NO_GPT
for (int k = 0;
k < __arraycount(gpt_parts);
k++) {
if (guid_is_equal(u, gpt_parts[k].guid))
d->part[j].guid = &gpt_parts[k];
}
d->part[j].attr = ep[i].ent_attr;
d->part[j].part_name =
alloc(BIOSDISK_PART_NAME_LEN);
part_name_utf8(ep[i].ent_name,
sizeof(ep[i].ent_name),
d->part[j].part_name,
BIOSDISK_PART_NAME_LEN);
#endif
j++;
}
}
}
if (crc != gpth.hdr_crc_table) {
#ifdef DISK_DEBUG
printf("GPT table CRC invalid\n");
#endif
return -1;
}
return 0;
}
static int
read_gpt(struct biosdisk *d, daddr_t rf_offset, daddr_t rf_size)
{
struct biosdisk_extinfo ed;
daddr_t gptsector[2];
int i, error;
if (d->ll.type != BIOSDISK_TYPE_HD)
/* No GPT on floppy and CD */
return -1;
if (rf_offset && rf_size) {
gptsector[0] = rf_offset + GPT_HDR_BLKNO;
gptsector[1] = rf_offset + rf_size - 1;
} else {
gptsector[0] = GPT_HDR_BLKNO;
if (set_geometry(&d->ll, &ed) == 0 &&
d->ll.flags & BIOSDISK_INT13EXT) {
gptsector[1] = ed.totsec - 1;
/* Sanity check values returned from BIOS */
if (ed.sbytes >= 512 &&
(ed.sbytes & (ed.sbytes - 1)) == 0)
d->ll.secsize = ed.sbytes;
} else {
#ifdef DISK_DEBUG
printf("Unable to determine extended disk geometry - "
"using CHS\n");
#endif
/* at least try some other reasonable values then */
gptsector[1] = d->ll.chs_sectors - 1;
}
}
for (i = 0; i < __arraycount(gptsector); i++) {
error = check_gpt(d, rf_offset, gptsector[i]);
if (error == 0)
break;
}
if (i >= __arraycount(gptsector)) {
memset(d->part, 0, sizeof(d->part));
return -1;
}
#ifndef USE_SECONDARY_GPT
if (i > 0) {
#ifdef DISK_DEBUG
printf("ignoring valid secondary GPT\n");
#endif
return -1;
}
#endif
#ifdef DISK_DEBUG
printf("using %s GPT\n", (i == 0) ? "primary" : "secondary");
#endif
return 0;
}
#endif /* !NO_GPT */
#ifndef NO_DISKLABEL
static void
ingest_label(struct biosdisk *d, struct disklabel *lp)
{
int part;
memset(d->part, 0, sizeof(d->part));
for (part = 0; part < lp->d_npartitions; part++) {
if (lp->d_partitions[part].p_size == 0)
continue;
if (lp->d_partitions[part].p_fstype == FS_UNUSED)
continue;
d->part[part].fstype = lp->d_partitions[part].p_fstype;
d->part[part].offset = lp->d_partitions[part].p_offset;
d->part[part].size = lp->d_partitions[part].p_size;
}
}
static int
check_label(struct biosdisk *d, daddr_t sector)
{
struct disklabel *lp;
/* find partition in NetBSD disklabel */
if (readsects(&d->ll, sector + LABELSECTOR, 1, d->buf, 0)) {
#ifdef DISK_DEBUG
printf("Error reading disklabel\n");
#endif
return EIO;
}
lp = (struct disklabel *) (d->buf + LABELOFFSET);
if (lp->d_magic != DISKMAGIC || dkcksum(lp)) {
#ifdef DISK_DEBUG
printf("warning: no disklabel in sector %"PRId64"\n", sector);
#endif
return -1;
}
ingest_label(d, lp);
bi_disk.labelsector = sector + LABELSECTOR;
bi_disk.label.type = lp->d_type;
memcpy(bi_disk.label.packname, lp->d_packname, 16);
bi_disk.label.checksum = lp->d_checksum;
bi_wedge.matchblk = sector + LABELSECTOR;
bi_wedge.matchnblks = 1;
md5(bi_wedge.matchhash, d->buf, d->ll.secsize);
return 0;
}
static int
read_minix_subp(struct biosdisk *d, struct disklabel* dflt_lbl,
int this_ext, daddr_t sector)
{
struct mbr_partition mbr[MBR_PART_COUNT];
int i;
int typ;
struct partition *p;
if (readsects(&d->ll, sector, 1, d->buf, 0)) {
#ifdef DISK_DEBUG
printf("Error reading MFS sector %"PRId64"\n", sector);
#endif
return EIO;
}
if ((uint8_t)d->buf[510] != 0x55 || (uint8_t)d->buf[511] != 0xAA) {
return -1;
}
memcpy(&mbr, MBR_PARTS(d->buf), sizeof(mbr));
for (i = 0; i < MBR_PART_COUNT; i++) {
typ = mbr[i].mbrp_type;
if (typ == 0)
continue;
sector = this_ext + mbr[i].mbrp_start;
if (dflt_lbl->d_npartitions >= MAXPARTITIONS)
continue;
p = &dflt_lbl->d_partitions[dflt_lbl->d_npartitions++];
p->p_offset = sector;
p->p_size = mbr[i].mbrp_size;
p->p_fstype = xlat_mbr_fstype(typ);
}
return 0;
}
#if defined(EFIBOOT) && defined(SUPPORT_CD9660)
static int
check_cd9660(struct biosdisk *d)
{
struct biosdisk_extinfo ed;
struct iso_primary_descriptor *vd;
daddr_t bno;
for (bno = 16;; bno++) {
if (readsects(&d->ll, bno, 1, d->buf, 0))
return -1;
vd = (struct iso_primary_descriptor *)d->buf;
if (memcmp(vd->id, ISO_STANDARD_ID, sizeof vd->id) != 0)
return -1;
if (isonum_711(vd->type) == ISO_VD_END)
return -1;
if (isonum_711(vd->type) == ISO_VD_PRIMARY)
break;
}
if (isonum_723(vd->logical_block_size) != ISO_DEFAULT_BLOCK_SIZE)
return -1;
if (set_geometry(&d->ll, &ed))
return -1;
memset(d->part, 0, sizeof(d->part));
d->part[0].fstype = FS_ISO9660;
d->part[0].offset = 0;
d->part[0].size = ed.totsec;
return 0;
}
#endif
static int
read_label(struct biosdisk *d, daddr_t offset)
{
struct disklabel dflt_lbl;
struct mbr_partition mbr[MBR_PART_COUNT];
struct partition *p;
uint32_t sector;
int i;
int error;
int typ;
uint32_t ext_base, this_ext, next_ext;
#ifdef COMPAT_386BSD_MBRPART
int sector_386bsd = -1;
#endif
memset(&dflt_lbl, 0, sizeof(dflt_lbl));
dflt_lbl.d_npartitions = 8;
d->boff = 0;
d->size = 0;
if (d->ll.type != BIOSDISK_TYPE_HD)
/* No label on floppy and CD */
return -1;
/*
* find NetBSD Partition in DOS partition table
* XXX check magic???
*/
ext_base = offset;
next_ext = offset;
for (;;) {
this_ext = ext_base + next_ext;
next_ext = offset;
if (readsects(&d->ll, this_ext, 1, d->buf, 0)) {
#ifdef DISK_DEBUG
printf("error reading MBR sector %u\n", this_ext);
#endif
return EIO;
}
memcpy(&mbr, MBR_PARTS(d->buf), sizeof(mbr));
/* Look for NetBSD partition ID */
for (i = 0; i < MBR_PART_COUNT; i++) {
typ = mbr[i].mbrp_type;
if (typ == 0)
continue;
sector = this_ext + mbr[i].mbrp_start;
#ifdef DISK_DEBUG
printf("ptn type %d in sector %u\n", typ, sector);
#endif
if (typ == MBR_PTYPE_MINIX_14B) {
if (!read_minix_subp(d, &dflt_lbl,
this_ext, sector)) {
/* Don't add "container" partition */
continue;
}
}
if (typ == MBR_PTYPE_NETBSD) {
error = check_label(d, sector);
if (error >= 0)
return error;
}
if (MBR_IS_EXTENDED(typ)) {
next_ext = mbr[i].mbrp_start + offset;
continue;
}
#ifdef COMPAT_386BSD_MBRPART
if (this_ext == offset && typ == MBR_PTYPE_386BSD)
sector_386bsd = sector;
#endif
if (this_ext != offset) {
if (dflt_lbl.d_npartitions >= MAXPARTITIONS)
continue;
p = &dflt_lbl.d_partitions[dflt_lbl.d_npartitions++];
} else
p = &dflt_lbl.d_partitions[i];
p->p_offset = sector;
p->p_size = mbr[i].mbrp_size;
p->p_fstype = xlat_mbr_fstype(typ);
}
if (next_ext == offset)
break;
if (ext_base == offset) {
ext_base = next_ext;
next_ext = offset;
}
}
sector = offset;
#ifdef COMPAT_386BSD_MBRPART
if (sector_386bsd != -1) {
printf("old BSD partition ID!\n");
sector = sector_386bsd;
}
#endif
/*
* One of two things:
* 1. no MBR
* 2. no NetBSD partition in MBR
*
* We simply default to "start of disk" in this case and
* press on.
*/
error = check_label(d, sector);
if (error >= 0)
return error;
#if defined(EFIBOOT) && defined(SUPPORT_CD9660)
/* Check CD/DVD */
error = check_cd9660(d);
if (error >= 0)
return error;
#endif
/*
* Nothing at start of disk, return info from mbr partitions.
*/
/* XXX fill it to make checksum match kernel one */
dflt_lbl.d_checksum = dkcksum(&dflt_lbl);
ingest_label(d, &dflt_lbl);
return 0;
}
#endif /* NO_DISKLABEL */
#if !defined(NO_DISKLABEL) || !defined(NO_GPT)
static int
read_partitions(struct biosdisk *d, daddr_t offset, daddr_t size)
{
int error;
error = -1;
#ifndef NO_GPT
error = read_gpt(d, offset, size);
if (error == 0)
return 0;
#endif
#ifndef NO_DISKLABEL
error = read_label(d, offset);
#endif
return error;
}
#endif
#ifndef NO_RAIDFRAME
static void
raidframe_probe(struct raidframe *raidframe, int *raidframe_count,
struct biosdisk *d, int part)
{
int i = *raidframe_count;
struct RF_ComponentLabel_s label;
daddr_t offset;
if (i + 1 > RAIDFRAME_NDEV)
return;
offset = d->part[part].offset;
if ((biosdisk_read_raidframe(d->ll.dev, offset, &label)) != 0)
return;
if (label.version != RF_COMPONENT_LABEL_VERSION)
printf("Unexpected raidframe label version\n");
raidframe[i].last_unit = label.last_unit;
raidframe[i].serial = label.serial_number;
raidframe[i].biosdev = d->ll.dev;
raidframe[i].parent_part = part;
#ifndef NO_GPT
if (d->part[part].part_name)
strlcpy(raidframe[i].parent_name,
d->part[part].part_name, MAXDEVNAME);
else
raidframe[i].parent_name[0] = '\0';
#endif
raidframe[i].offset = offset;
raidframe[i].size = label.__numBlocks;
(*raidframe_count)++;
return;
}
#endif
void
biosdisk_probe(void)
{
struct biosdisk *d;
struct biosdisk_extinfo ed;
#ifndef NO_RAIDFRAME
struct raidframe raidframe[RAIDFRAME_NDEV];
int raidframe_count = 0;
#endif
uint64_t size;
int first;
int i;
#if !defined(NO_DISKLABEL) || !defined(NO_GPT)
int part;
#endif
for (i = 0; i < MAX_BIOSDISKS + 2; i++) {
first = 1;
d = alloc(sizeof(*d));
if (d == NULL) {
printf("Out of memory\n");
return;
}
memset(d, 0, sizeof(*d));
memset(&ed, 0, sizeof(ed));
if (i >= MAX_BIOSDISKS)
d->ll.dev = 0x00 + i - MAX_BIOSDISKS; /* fd */
else
d->ll.dev = 0x80 + i; /* hd/cd */
if (set_geometry(&d->ll, &ed))
goto next_disk;
printf("disk ");
switch (d->ll.type) {
case BIOSDISK_TYPE_CD:
printf("cd0\n cd0a\n");
break;
case BIOSDISK_TYPE_FD:
printf("fd%d\n", d->ll.dev & 0x7f);
printf(" fd%da\n", d->ll.dev & 0x7f);
break;
case BIOSDISK_TYPE_HD:
printf("hd%d", d->ll.dev & 0x7f);
if (d->ll.flags & BIOSDISK_INT13EXT) {
printf(" size ");
size = ed.totsec * ed.sbytes;
if (size >= (10ULL * 1024 * 1024 * 1024))
printf("%"PRIu64" GB",
size / (1024 * 1024 * 1024));
else
printf("%"PRIu64" MB",
size / (1024 * 1024));
}
printf("\n");
break;
}
#if !defined(NO_DISKLABEL) || !defined(NO_GPT)
if (d->ll.type != BIOSDISK_TYPE_HD)
goto next_disk;
if (read_partitions(d, 0, 0) != 0)
goto next_disk;
for (part = 0; part < BIOSDISKNPART; part++) {
if (d->part[part].size == 0)
continue;
if (d->part[part].fstype == FS_UNUSED)
continue;
#ifndef NO_RAIDFRAME
if (d->part[part].fstype == FS_RAID)
raidframe_probe(raidframe,
&raidframe_count, d, part);
#endif
if (first) {
printf(" ");
first = 0;
}
#ifndef NO_GPT
if (d->part[part].part_name &&
d->part[part].part_name[0])
printf(" NAME=%s(", d->part[part].part_name);
else
#endif
printf(" hd%d%c(", d->ll.dev & 0x7f, part + 'a');
#ifndef NO_GPT
if (d->part[part].guid != NULL)
printf("%s", d->part[part].guid->name);
else
#endif
if (d->part[part].fstype < FSMAXTYPES)
printf("%s",
fstypenames[d->part[part].fstype]);
else
printf("%d", d->part[part].fstype);
printf(")");
}
#endif
if (first == 0)
printf("\n");
next_disk:
dealloc_biosdisk(d);
}
#ifndef NO_RAIDFRAME
for (i = 0; i < raidframe_count; i++) {
size_t secsize;
if ((d = alloc_biosdisk(raidframe[i].biosdev)) == NULL) {
printf("Out of memory\n");
return;
}
secsize = d->ll.secsize;
printf("raidframe raid%d serial %d in ",
raidframe[i].last_unit, raidframe[i].serial);
#ifndef NO_GPT
if (raidframe[i].parent_name[0])
printf("NAME=%s size ", raidframe[i].parent_name);
else
#endif
printf("hd%d%c size ", d->ll.dev & 0x7f,
raidframe[i].parent_part + 'a');
if (raidframe[i].size >= (10ULL * 1024 * 1024 * 1024 / secsize))
printf("%"PRIu64" GB",
raidframe[i].size / (1024 * 1024 * 1024 / secsize));
else
printf("%"PRIu64" MB",
raidframe[i].size / (1024 * 1024 / secsize));
printf("\n");
if (read_partitions(d,
raidframe[i].offset + RF_PROTECTED_SECTORS,
raidframe[i].size) != 0)
goto next_raidrame;
first = 1;
for (part = 0; part < BIOSDISKNPART; part++) {
#ifndef NO_GPT
bool bootme = d->part[part].attr & GPT_ENT_ATTR_BOOTME;
#else
bool bootme = 0;
#endif
if (d->part[part].size == 0)
continue;
if (d->part[part].fstype == FS_UNUSED)
continue;
if (d->part[part].fstype == FS_RAID)
continue;
if (first) {
printf(" ");
first = 0;
}
#ifndef NO_GPT
if (d->part[part].part_name &&
d->part[part].part_name[0])
printf(" NAME=%s(", d->part[part].part_name);
else
#endif
printf(" raid%d%c(", raidframe[i].last_unit,
part + 'a');
#ifndef NO_GPT
if (d->part[part].guid != NULL)
printf("%s", d->part[part].guid->name);
else
#endif
if (d->part[part].fstype < FSMAXTYPES)
printf("%s",
fstypenames[d->part[part].fstype]);
else
printf("%d", d->part[part].fstype);
printf("%s)", bootme ? ", bootme" : "");
}
next_raidrame:
if (first == 0)
printf("\n");
dealloc_biosdisk(d);
}
#endif
}
/* Determine likely partition for possible sector number of dos
* partition.
*/
int
biosdisk_findpartition(int biosdev, daddr_t sector,
int *partition, const char **part_name)
{
#if defined(NO_DISKLABEL) && defined(NO_GPT)
*partition = 0;
if (part_name)
*part_name = NULL;
return 0;
#else
int i;
struct biosdisk *d;
int biosboot_sector_part = -1;
int bootable_fs_part = -1;
int boot_part = 0;
#ifndef NO_GPT
int gpt_bootme_part = -1;
static char namebuf[MAXDEVNAME + 1];
#endif
#ifdef DISK_DEBUG
printf("looking for partition device %x, sector %"PRId64"\n", biosdev, sector);
#endif
/* default to first partition */
*partition = 0;
if (part_name)
*part_name = NULL;
/* Look for netbsd partition that is the dos boot one */
d = alloc_biosdisk(biosdev);
if (d == NULL)
return -1;
if (read_partitions(d, 0, 0) == 0) {
for (i = 0; i < BIOSDISKNPART; i++) {
if (d->part[i].fstype == FS_UNUSED)
continue;
if (d->part[i].offset == sector &&
biosboot_sector_part == -1)
biosboot_sector_part = i;
#ifndef NO_GPT
if (d->part[i].attr & GPT_ENT_ATTR_BOOTME &&
gpt_bootme_part == -1)
gpt_bootme_part = i;
#endif
switch (d->part[i].fstype) {
case FS_BSDFFS:
case FS_BSDLFS:
case FS_RAID:
case FS_CCD:
case FS_CGD:
case FS_ISO9660:
if (bootable_fs_part == -1)
bootable_fs_part = i;
break;
default:
break;
}
}
#ifndef NO_GPT
if (gpt_bootme_part != -1)
boot_part = gpt_bootme_part;
else
#endif
if (biosboot_sector_part != -1)
boot_part = biosboot_sector_part;
else if (bootable_fs_part != -1)
boot_part = bootable_fs_part;
else
boot_part = 0;
*partition = boot_part;
#ifndef NO_GPT
if (part_name &&
d->part[boot_part].part_name &&
d->part[boot_part].part_name[0]) {
strlcpy(namebuf, d->part[boot_part].part_name,
BIOSDISK_PART_NAME_LEN);
*part_name = namebuf;
}
#endif
}
dealloc_biosdisk(d);
return 0;
#endif /* NO_DISKLABEL && NO_GPT */
}
int
biosdisk_readpartition(int biosdev, daddr_t offset, daddr_t size,
struct biosdisk_partition **partpp, int *rnum)
{
#if defined(NO_DISKLABEL) && defined(NO_GPT)
return ENOTSUP;
#else
struct biosdisk *d;
struct biosdisk_partition *part;
int rv;
/* Look for netbsd partition that is the dos boot one */
d = alloc_biosdisk(biosdev);
if (d == NULL)
return ENOMEM;
if (read_partitions(d, offset, size)) {
rv = EINVAL;
goto out;
}
part = copy_biosdisk_part(d);
if (part == NULL) {
rv = ENOMEM;
goto out;
}
*partpp = part;
*rnum = (int)__arraycount(d->part);
rv = 0;
out:
dealloc_biosdisk(d);
return rv;
#endif /* NO_DISKLABEL && NO_GPT */
}
#ifndef NO_RAIDFRAME
int
biosdisk_read_raidframe(int biosdev, daddr_t offset,
struct RF_ComponentLabel_s *label)
{
#if defined(NO_DISKLABEL) && defined(NO_GPT)
return ENOTSUP;
#else
struct biosdisk *d;
struct biosdisk_extinfo ed;
daddr_t size;
int rv = -1;
/* Look for netbsd partition that is the dos boot one */
d = alloc_biosdisk(biosdev);
if (d == NULL)
goto out;
if (d->ll.type != BIOSDISK_TYPE_HD)
/* No raidframe on floppy and CD */
goto out;
if (set_geometry(&d->ll, &ed) != 0)
goto out;
/* Sanity check values returned from BIOS */
if (ed.sbytes >= 512 &&
(ed.sbytes & (ed.sbytes - 1)) == 0)
d->ll.secsize = ed.sbytes;
offset += (RF_COMPONENT_INFO_OFFSET / d->ll.secsize);
size = roundup(sizeof(*label), d->ll.secsize) / d->ll.secsize;
if (readsects(&d->ll, offset, size, d->buf, 0))
goto out;
memcpy(label, d->buf, sizeof(*label));
rv = 0;
out:
if (d != NULL)
dealloc_biosdisk(d);
return rv;
#endif /* NO_DISKLABEL && NO_GPT */
}
#endif /* NO_RAIDFRAME */
#ifdef _STANDALONE
static void
add_biosdisk_bootinfo(void)
{
#ifndef EFIBOOT
if (bootinfo == NULL) {
return;
}
BI_ADD(&bi_disk, BTINFO_BOOTDISK, sizeof(bi_disk));
BI_ADD(&bi_wedge, BTINFO_BOOTWEDGE, sizeof(bi_wedge));
#endif
return;
}
#endif
#ifndef NO_GPT
static void
raidframe_part_offset(struct biosdisk *d, int part)
{
struct biosdisk raidframe;
daddr_t rf_offset;
daddr_t rf_size;
int i, candidate;
memset(&raidframe, 0, sizeof(raidframe));
raidframe.ll = d->ll;
rf_offset = d->part[part].offset + RF_PROTECTED_SECTORS;
rf_size = d->part[part].size;
if (read_gpt(&raidframe, rf_offset, rf_size) != 0) {
d->boff += RF_PROTECTED_SECTORS;
return;
}
candidate = 0;
for (i = 0; i < BIOSDISKNPART; i++) {
if (raidframe.part[i].size == 0)
continue;
if (raidframe.part[i].fstype == FS_UNUSED)
continue;
#ifndef NO_GPT
if (raidframe.part[i].attr & GPT_ENT_ATTR_BOOTME) {
candidate = i;
break;
}
#endif
if (raidframe.part[i].fstype == FS_BSDFFS ||
raidframe.part[i].fstype == FS_BSDLFS) {
if (candidate == 0)
candidate = i;
}
}
d->boff += RF_PROTECTED_SECTORS + raidframe.part[candidate].offset;
d->size = raidframe.part[candidate].size;
}
#endif
int
biosdisk_open(struct open_file *f, ...)
/* struct open_file *f, int biosdev, int partition */
{
va_list ap;
struct biosdisk *d;
int biosdev;
int partition;
int error = 0;
va_start(ap, f);
biosdev = va_arg(ap, int);
d = alloc_biosdisk(biosdev);
if (d == NULL) {
error = ENXIO;
goto out;
}
partition = va_arg(ap, int);
bi_disk.biosdev = d->ll.dev;
bi_disk.partition = partition;
bi_disk.labelsector = -1;
bi_wedge.biosdev = d->ll.dev;
bi_wedge.matchblk = -1;
#if !defined(NO_DISKLABEL) || !defined(NO_GPT)
error = read_partitions(d, 0, 0);
if (error == -1) {
error = 0;
goto nolabel;
}
if (error)
goto out;
if (partition >= BIOSDISKNPART ||
d->part[partition].fstype == FS_UNUSED) {
#ifdef DISK_DEBUG
printf("illegal partition\n");
#endif
error = EPART;
goto out;
}
d->boff = d->part[partition].offset;
d->size = d->part[partition].size;
if (d->part[partition].fstype == FS_RAID)
#ifndef NO_GPT
raidframe_part_offset(d, partition);
#else
d->boff += RF_PROTECTED_SECTORS;
#endif
#ifdef _STANDALONE
bi_wedge.startblk = d->boff;
bi_wedge.nblks = d->size;
#endif
nolabel:
#endif
#ifdef DISK_DEBUG
printf("partition @%"PRId64"\n", d->boff);
#endif
#ifdef _STANDALONE
add_biosdisk_bootinfo();
#endif
f->f_devdata = d;
out:
va_end(ap);
if (error)
dealloc_biosdisk(d);
return error;
}
#ifndef NO_GPT
static int
biosdisk_find_name(const char *fname, int *biosdev,
daddr_t *offset, daddr_t *size)
{
struct biosdisk *d;
char name[MAXDEVNAME + 1];
char *sep;
#ifndef NO_RAIDFRAME
struct raidframe raidframe[RAIDFRAME_NDEV];
int raidframe_count = 0;
#endif
int i;
int part;
int ret = -1;
/* Strip leadinf NAME= and cut after the coloon included */
strlcpy(name, fname + 5, MAXDEVNAME);
sep = strchr(name, ':');
if (sep)
*sep = '\0';
for (i = 0; i < MAX_BIOSDISKS; i++) {
d = alloc(sizeof(*d));
if (d == NULL) {
printf("Out of memory\n");
goto out;
}
memset(d, 0, sizeof(*d));
d->ll.dev = 0x80 + i; /* hd/cd */
if (set_geometry(&d->ll, NULL))
goto next_disk;
if (d->ll.type != BIOSDISK_TYPE_HD)
goto next_disk;
if (read_partitions(d, 0, 0) != 0)
goto next_disk;
for (part = 0; part < BIOSDISKNPART; part++) {
if (d->part[part].size == 0)
continue;
if (d->part[part].fstype == FS_UNUSED)
continue;
#ifndef NO_RAIDFRAME
if (d->part[part].fstype == FS_RAID) {
raidframe_probe(raidframe,
&raidframe_count, d, part);
/*
* Do not match RAID partition for a name,
* we want to report an inner partition.
*/
continue;
}
#endif
if (d->part[part].part_name != NULL &&
strcmp(d->part[part].part_name, name) == 0) {
*biosdev = d->ll.dev;
*offset = d->part[part].offset;
*size = d->part[part].size;
ret = 0;
goto out;
}
}
next_disk:
dealloc_biosdisk(d);
d = NULL;
}
#ifndef NO_RAIDFRAME
for (i = 0; i < raidframe_count; i++) {
int first_bootme = -1;
int first_ffs = -1;
int candidate = -1;
if ((d = alloc_biosdisk(raidframe[i].biosdev)) == NULL) {
printf("Out of memory\n");
goto out;
}
if (read_partitions(d,
raidframe[i].offset + RF_PROTECTED_SECTORS,
raidframe[i].size) != 0)
goto next_raidframe;
for (part = 0; part < BIOSDISKNPART; part++) {
if (d->part[part].size == 0)
continue;
if (d->part[part].fstype == FS_UNUSED)
continue;
if (first_bootme == -1 &&
d->part[part].attr & GPT_ENT_ATTR_BOOTME)
first_bootme = part;
if (first_ffs == -1 &&
(d->part[part].fstype == FS_BSDFFS ||
d->part[part].fstype == FS_BSDLFS))
first_ffs = part;
if (d->part[part].part_name != NULL &&
strcmp(d->part[part].part_name, name) == 0) {
*biosdev = raidframe[i].biosdev;
*offset = raidframe[i].offset
+ RF_PROTECTED_SECTORS
+ d->part[part].offset;
*size = d->part[part].size;
ret = 0;
goto out;
}
}
if (strcmp(raidframe[i].parent_name, name) == 0) {
if (first_bootme != -1)
candidate = first_bootme;
else if (first_ffs != -1)
candidate = first_ffs;
}
if (candidate != -1) {
*biosdev = raidframe[i].biosdev;
*offset = raidframe[i].offset
+ RF_PROTECTED_SECTORS
+ d->part[candidate].offset;
*size = d->part[candidate].size;
ret = 0;
goto out;
}
next_raidframe:
dealloc_biosdisk(d);
d = NULL;
}
#endif
out:
if (d != NULL)
dealloc_biosdisk(d);
return ret;
}
#endif
#ifndef NO_RAIDFRAME
static int
biosdisk_find_raid(const char *name, int *biosdev,
daddr_t *offset, daddr_t *size)
{
struct biosdisk *d = NULL;
struct raidframe raidframe[RAIDFRAME_NDEV];
int raidframe_count = 0;
int i;
int target_unit = 0;
int target_part;
int part;
int ret = -1;
if (strstr(name, "raid") != name)
goto out;
#define isnum(c) ((c) >= '0' && (c) <= '9')
i = 4; /* skip leading "raid" */
if (!isnum(name[i]))
goto out;
do {
target_unit *= 10;
target_unit += name[i++] - '0';
} while (isnum(name[i]));
#define isvalidpart(c) ((c) >= 'a' && (c) <= 'z')
if (!isvalidpart(name[i]))
goto out;
target_part = name[i] - 'a';
for (i = 0; i < MAX_BIOSDISKS; i++) {
d = alloc(sizeof(*d));
if (d == NULL) {
printf("Out of memory\n");
goto out;
}
memset(d, 0, sizeof(*d));
d->ll.dev = 0x80 + i; /* hd/cd */
if (set_geometry(&d->ll, NULL))
goto next_disk;
if (d->ll.type != BIOSDISK_TYPE_HD)
goto next_disk;
if (read_partitions(d, 0, 0) != 0)
goto next_disk;
for (part = 0; part < BIOSDISKNPART; part++) {
if (d->part[part].size == 0)
continue;
if (d->part[part].fstype != FS_RAID)
continue;
raidframe_probe(raidframe,
&raidframe_count, d, part);
}
next_disk:
dealloc_biosdisk(d);
d = NULL;
}
for (i = 0; i < raidframe_count; i++) {
int first_bootme = -1;
int first_ffs = -1;
int candidate = -1;
if (raidframe[i].last_unit != target_unit)
continue;
if ((d = alloc_biosdisk(raidframe[i].biosdev)) == NULL) {
printf("Out of memory\n");
goto out;
}
if (read_partitions(d,
raidframe[i].offset + RF_PROTECTED_SECTORS,
raidframe[i].size) != 0)
goto next_raidframe;
for (part = 0; part < BIOSDISKNPART; part++) {
if (d->part[part].size == 0)
continue;
if (d->part[part].fstype == FS_UNUSED)
continue;
#ifndef NO_GPT
if (first_bootme == -1 &&
d->part[part].attr & GPT_ENT_ATTR_BOOTME)
first_bootme = part;
#endif
if (first_ffs == -1 &&
(d->part[part].fstype == FS_BSDFFS ||
d->part[part].fstype == FS_BSDLFS))
first_ffs = part;
if (part == target_part) {
*biosdev = raidframe[i].biosdev;
*offset = raidframe[i].offset
+ RF_PROTECTED_SECTORS
+ d->part[part].offset;
*size = d->part[part].size;
ret = 0;
goto out;
}
}
if (first_bootme != -1)
candidate = first_bootme;
else if (first_ffs != -1)
candidate = first_ffs;
if (candidate != -1) {
*biosdev = raidframe[i].biosdev;
*offset = raidframe[i].offset
+ RF_PROTECTED_SECTORS
+ d->part[candidate].offset;
*size = d->part[candidate].size;
ret = 0;
goto out;
}
next_raidframe:
dealloc_biosdisk(d);
d = NULL;
}
out:
if (d != NULL)
dealloc_biosdisk(d);
return ret;
}
#endif
int
biosdisk_open_name(struct open_file *f, const char *name)
{
#if defined(NO_GPT) && defined(NO_RAIDFRAME)
return ENXIO;
#else
struct biosdisk *d = NULL;
int biosdev;
daddr_t offset;
daddr_t size;
int error = -1;
#ifndef NO_GPT
if (error && strstr(name, "NAME=") == name)
error = biosdisk_find_name(name, &biosdev, &offset, &size);
#endif
#ifndef NO_RAIDFRAME
if (error && strstr(name, "raid") == name)
error = biosdisk_find_raid(name, &biosdev, &offset, &size);
#endif
if (error != 0) {
printf("%s not found\n", name);
error = ENXIO;
goto out;
}
d = alloc_biosdisk(biosdev);
if (d == NULL) {
error = ENXIO;
goto out;
}
bi_disk.biosdev = d->ll.dev;
bi_disk.partition = 0;
bi_disk.labelsector = -1;
bi_wedge.biosdev = d->ll.dev;
/*
* If we did not get wedge match info from check_gpt()
* compute it now.
*/
if (bi_wedge.matchblk == -1) {
if (readsects(&d->ll, offset, 1, d->buf, 1)) {
#ifdef DISK_DEBUG
printf("Error reading sector at %"PRId64"\n", offset);
#endif
error = EIO;
goto out;
}
bi_wedge.matchblk = offset;
bi_wedge.matchnblks = 1;
md5(bi_wedge.matchhash, d->buf, d->ll.secsize);
}
d->boff = offset;
bi_wedge.startblk = offset;
bi_wedge.nblks = size;
#ifdef _STANDALONE
add_biosdisk_bootinfo();
#endif
f->f_devdata = d;
out:
if (error && d != NULL)
dealloc_biosdisk(d);
return error;
#endif
}
#ifndef LIBSA_NO_FS_CLOSE
int
biosdisk_close(struct open_file *f)
{
struct biosdisk *d = f->f_devdata;
/* let the floppy drive go off */
if (d->ll.type == BIOSDISK_TYPE_FD)
wait_sec(3); /* 2s is enough on all PCs I found */
dealloc_biosdisk(d);
f->f_devdata = NULL;
return 0;
}
#endif
int
biosdisk_ioctl(struct open_file *f, u_long cmd, void *arg)
{
return EIO;
}
