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freebsd-dev/sys/geom/part/g_part_gpt.c
Konstantin Belousov cd85379104 Make MAXPHYS tunable. Bump MAXPHYS to 1M. 
Replace MAXPHYS by runtime variable maxphys. It is initialized from
MAXPHYS by default, but can be also adjusted with the tunable kern.maxphys.

Make b_pages[] array in struct buf flexible.  Size b_pages[] for buffer
cache buffers exactly to atop(maxbcachebuf) (currently it is sized to
atop(MAXPHYS)), and b_pages[] for pbufs is sized to atop(maxphys) + 1.
The +1 for pbufs allow several pbuf consumers, among them vmapbuf(),
to use unaligned buffers still sized to maxphys, esp. when such
buffers come from userspace (*).  Overall, we save significant amount
of otherwise wasted memory in b_pages[] for buffer cache buffers,
while bumping MAXPHYS to desired high value.

Eliminate all direct uses of the MAXPHYS constant in kernel and driver
sources, except a place which initialize maxphys.  Some random (and
arguably weird) uses of MAXPHYS, e.g. in linuxolator, are converted
straight.  Some drivers, which use MAXPHYS to size embeded structures,
get private MAXPHYS-like constant; their convertion is out of scope
for this work.

Changes to cam/, dev/ahci, dev/ata, dev/mpr, dev/mpt, dev/mvs,
dev/siis, where either submitted by, or based on changes by mav.

Suggested by: mav (*)
Reviewed by:	imp, mav, imp, mckusick, scottl (intermediate versions)
Tested by:	pho
Sponsored by:	The FreeBSD Foundation
Differential revision:	https://reviews.freebsd.org/D27225
2020-11-28 12:12:51 +00:00

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/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2002, 2005-2007, 2011 Marcel Moolenaar
* 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/bio.h>
#include <sys/diskmbr.h>
#include <sys/gsb_crc32.h>
#include <sys/endian.h>
#include <sys/gpt.h>
#include <sys/kernel.h>
#include <sys/kobj.h>
#include <sys/limits.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/mutex.h>
#include <sys/queue.h>
#include <sys/sbuf.h>
#include <sys/systm.h>
#include <sys/sysctl.h>
#include <sys/uuid.h>
#include <geom/geom.h>
#include <geom/geom_int.h>
#include <geom/part/g_part.h>
#include "g_part_if.h"
FEATURE(geom_part_gpt, "GEOM partitioning class for GPT partitions support");
SYSCTL_DECL(_kern_geom_part);
static SYSCTL_NODE(_kern_geom_part, OID_AUTO, gpt,
CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
"GEOM_PART_GPT GUID Partition Table");
static u_int allow_nesting = 0;
SYSCTL_UINT(_kern_geom_part_gpt, OID_AUTO, allow_nesting,
CTLFLAG_RWTUN, &allow_nesting, 0, "Allow GPT to be nested inside other schemes");
CTASSERT(offsetof(struct gpt_hdr, padding) == 92);
CTASSERT(sizeof(struct gpt_ent) == 128);
extern u_int geom_part_check_integrity;
#define EQUUID(a,b) (memcmp(a, b, sizeof(struct uuid)) == 0)
#define MBRSIZE 512
enum gpt_elt {
GPT_ELT_PRIHDR,
GPT_ELT_PRITBL,
GPT_ELT_SECHDR,
GPT_ELT_SECTBL,
GPT_ELT_COUNT
};
enum gpt_state {
GPT_STATE_UNKNOWN, /* Not determined. */
GPT_STATE_MISSING, /* No signature found. */
GPT_STATE_CORRUPT, /* Checksum mismatch. */
GPT_STATE_INVALID, /* Nonconformant/invalid. */
GPT_STATE_OK /* Perfectly fine. */
};
struct g_part_gpt_table {
struct g_part_table base;
u_char mbr[MBRSIZE];
struct gpt_hdr *hdr;
quad_t lba[GPT_ELT_COUNT];
enum gpt_state state[GPT_ELT_COUNT];
int bootcamp;
};
struct g_part_gpt_entry {
struct g_part_entry base;
struct gpt_ent ent;
};
static void g_gpt_printf_utf16(struct sbuf *, uint16_t *, size_t);
static void g_gpt_utf8_to_utf16(const uint8_t *, uint16_t *, size_t);
static void g_gpt_set_defaults(struct g_part_table *, struct g_provider *);
static int g_part_gpt_add(struct g_part_table *, struct g_part_entry *,
struct g_part_parms *);
static int g_part_gpt_bootcode(struct g_part_table *, struct g_part_parms *);
static int g_part_gpt_create(struct g_part_table *, struct g_part_parms *);
static int g_part_gpt_destroy(struct g_part_table *, struct g_part_parms *);
static void g_part_gpt_dumpconf(struct g_part_table *, struct g_part_entry *,
struct sbuf *, const char *);
static int g_part_gpt_dumpto(struct g_part_table *, struct g_part_entry *);
static int g_part_gpt_modify(struct g_part_table *, struct g_part_entry *,
struct g_part_parms *);
static const char *g_part_gpt_name(struct g_part_table *, struct g_part_entry *,
char *, size_t);
static int g_part_gpt_probe(struct g_part_table *, struct g_consumer *);
static int g_part_gpt_read(struct g_part_table *, struct g_consumer *);
static int g_part_gpt_setunset(struct g_part_table *table,
struct g_part_entry *baseentry, const char *attrib, unsigned int set);
static const char *g_part_gpt_type(struct g_part_table *, struct g_part_entry *,
char *, size_t);
static int g_part_gpt_write(struct g_part_table *, struct g_consumer *);
static int g_part_gpt_resize(struct g_part_table *, struct g_part_entry *,
struct g_part_parms *);
static int g_part_gpt_recover(struct g_part_table *);
static kobj_method_t g_part_gpt_methods[] = {
KOBJMETHOD(g_part_add, g_part_gpt_add),
KOBJMETHOD(g_part_bootcode, g_part_gpt_bootcode),
KOBJMETHOD(g_part_create, g_part_gpt_create),
KOBJMETHOD(g_part_destroy, g_part_gpt_destroy),
KOBJMETHOD(g_part_dumpconf, g_part_gpt_dumpconf),
KOBJMETHOD(g_part_dumpto, g_part_gpt_dumpto),
KOBJMETHOD(g_part_modify, g_part_gpt_modify),
KOBJMETHOD(g_part_resize, g_part_gpt_resize),
KOBJMETHOD(g_part_name, g_part_gpt_name),
KOBJMETHOD(g_part_probe, g_part_gpt_probe),
KOBJMETHOD(g_part_read, g_part_gpt_read),
KOBJMETHOD(g_part_recover, g_part_gpt_recover),
KOBJMETHOD(g_part_setunset, g_part_gpt_setunset),
KOBJMETHOD(g_part_type, g_part_gpt_type),
KOBJMETHOD(g_part_write, g_part_gpt_write),
{ 0, 0 }
};
static struct g_part_scheme g_part_gpt_scheme = {
"GPT",
g_part_gpt_methods,
sizeof(struct g_part_gpt_table),
.gps_entrysz = sizeof(struct g_part_gpt_entry),
.gps_minent = 128,
.gps_maxent = 4096,
.gps_bootcodesz = MBRSIZE,
};
G_PART_SCHEME_DECLARE(g_part_gpt);
MODULE_VERSION(geom_part_gpt, 0);
static struct uuid gpt_uuid_apple_apfs = GPT_ENT_TYPE_APPLE_APFS;
static struct uuid gpt_uuid_apple_boot = GPT_ENT_TYPE_APPLE_BOOT;
static struct uuid gpt_uuid_apple_core_storage =
GPT_ENT_TYPE_APPLE_CORE_STORAGE;
static struct uuid gpt_uuid_apple_hfs = GPT_ENT_TYPE_APPLE_HFS;
static struct uuid gpt_uuid_apple_label = GPT_ENT_TYPE_APPLE_LABEL;
static struct uuid gpt_uuid_apple_raid = GPT_ENT_TYPE_APPLE_RAID;
static struct uuid gpt_uuid_apple_raid_offline = GPT_ENT_TYPE_APPLE_RAID_OFFLINE;
static struct uuid gpt_uuid_apple_tv_recovery = GPT_ENT_TYPE_APPLE_TV_RECOVERY;
static struct uuid gpt_uuid_apple_ufs = GPT_ENT_TYPE_APPLE_UFS;
static struct uuid gpt_uuid_apple_zfs = GPT_ENT_TYPE_APPLE_ZFS;
static struct uuid gpt_uuid_bios_boot = GPT_ENT_TYPE_BIOS_BOOT;
static struct uuid gpt_uuid_chromeos_firmware = GPT_ENT_TYPE_CHROMEOS_FIRMWARE;
static struct uuid gpt_uuid_chromeos_kernel = GPT_ENT_TYPE_CHROMEOS_KERNEL;
static struct uuid gpt_uuid_chromeos_reserved = GPT_ENT_TYPE_CHROMEOS_RESERVED;
static struct uuid gpt_uuid_chromeos_root = GPT_ENT_TYPE_CHROMEOS_ROOT;
static struct uuid gpt_uuid_dfbsd_ccd = GPT_ENT_TYPE_DRAGONFLY_CCD;
static struct uuid gpt_uuid_dfbsd_hammer = GPT_ENT_TYPE_DRAGONFLY_HAMMER;
static struct uuid gpt_uuid_dfbsd_hammer2 = GPT_ENT_TYPE_DRAGONFLY_HAMMER2;
static struct uuid gpt_uuid_dfbsd_label32 = GPT_ENT_TYPE_DRAGONFLY_LABEL32;
static struct uuid gpt_uuid_dfbsd_label64 = GPT_ENT_TYPE_DRAGONFLY_LABEL64;
static struct uuid gpt_uuid_dfbsd_legacy = GPT_ENT_TYPE_DRAGONFLY_LEGACY;
static struct uuid gpt_uuid_dfbsd_swap = GPT_ENT_TYPE_DRAGONFLY_SWAP;
static struct uuid gpt_uuid_dfbsd_ufs1 = GPT_ENT_TYPE_DRAGONFLY_UFS1;
static struct uuid gpt_uuid_dfbsd_vinum = GPT_ENT_TYPE_DRAGONFLY_VINUM;
static struct uuid gpt_uuid_efi = GPT_ENT_TYPE_EFI;
static struct uuid gpt_uuid_freebsd = GPT_ENT_TYPE_FREEBSD;
static struct uuid gpt_uuid_freebsd_boot = GPT_ENT_TYPE_FREEBSD_BOOT;
static struct uuid gpt_uuid_freebsd_nandfs = GPT_ENT_TYPE_FREEBSD_NANDFS;
static struct uuid gpt_uuid_freebsd_swap = GPT_ENT_TYPE_FREEBSD_SWAP;
static struct uuid gpt_uuid_freebsd_ufs = GPT_ENT_TYPE_FREEBSD_UFS;
static struct uuid gpt_uuid_freebsd_vinum = GPT_ENT_TYPE_FREEBSD_VINUM;
static struct uuid gpt_uuid_freebsd_zfs = GPT_ENT_TYPE_FREEBSD_ZFS;
static struct uuid gpt_uuid_linux_data = GPT_ENT_TYPE_LINUX_DATA;
static struct uuid gpt_uuid_linux_lvm = GPT_ENT_TYPE_LINUX_LVM;
static struct uuid gpt_uuid_linux_raid = GPT_ENT_TYPE_LINUX_RAID;
static struct uuid gpt_uuid_linux_swap = GPT_ENT_TYPE_LINUX_SWAP;
static struct uuid gpt_uuid_mbr = GPT_ENT_TYPE_MBR;
static struct uuid gpt_uuid_ms_basic_data = GPT_ENT_TYPE_MS_BASIC_DATA;
static struct uuid gpt_uuid_ms_ldm_data = GPT_ENT_TYPE_MS_LDM_DATA;
static struct uuid gpt_uuid_ms_ldm_metadata = GPT_ENT_TYPE_MS_LDM_METADATA;
static struct uuid gpt_uuid_ms_recovery = GPT_ENT_TYPE_MS_RECOVERY;
static struct uuid gpt_uuid_ms_reserved = GPT_ENT_TYPE_MS_RESERVED;
static struct uuid gpt_uuid_ms_spaces = GPT_ENT_TYPE_MS_SPACES;
static struct uuid gpt_uuid_netbsd_ccd = GPT_ENT_TYPE_NETBSD_CCD;
static struct uuid gpt_uuid_netbsd_cgd = GPT_ENT_TYPE_NETBSD_CGD;
static struct uuid gpt_uuid_netbsd_ffs = GPT_ENT_TYPE_NETBSD_FFS;
static struct uuid gpt_uuid_netbsd_lfs = GPT_ENT_TYPE_NETBSD_LFS;
static struct uuid gpt_uuid_netbsd_raid = GPT_ENT_TYPE_NETBSD_RAID;
static struct uuid gpt_uuid_netbsd_swap = GPT_ENT_TYPE_NETBSD_SWAP;
static struct uuid gpt_uuid_openbsd_data = GPT_ENT_TYPE_OPENBSD_DATA;
static struct uuid gpt_uuid_prep_boot = GPT_ENT_TYPE_PREP_BOOT;
static struct uuid gpt_uuid_solaris_boot = GPT_ENT_TYPE_SOLARIS_BOOT;
static struct uuid gpt_uuid_solaris_root = GPT_ENT_TYPE_SOLARIS_ROOT;
static struct uuid gpt_uuid_solaris_swap = GPT_ENT_TYPE_SOLARIS_SWAP;
static struct uuid gpt_uuid_solaris_backup = GPT_ENT_TYPE_SOLARIS_BACKUP;
static struct uuid gpt_uuid_solaris_var = GPT_ENT_TYPE_SOLARIS_VAR;
static struct uuid gpt_uuid_solaris_home = GPT_ENT_TYPE_SOLARIS_HOME;
static struct uuid gpt_uuid_solaris_altsec = GPT_ENT_TYPE_SOLARIS_ALTSEC;
static struct uuid gpt_uuid_solaris_reserved = GPT_ENT_TYPE_SOLARIS_RESERVED;
static struct uuid gpt_uuid_unused = GPT_ENT_TYPE_UNUSED;
static struct uuid gpt_uuid_vmfs = GPT_ENT_TYPE_VMFS;
static struct uuid gpt_uuid_vmkdiag = GPT_ENT_TYPE_VMKDIAG;
static struct uuid gpt_uuid_vmreserved = GPT_ENT_TYPE_VMRESERVED;
static struct uuid gpt_uuid_vmvsanhdr = GPT_ENT_TYPE_VMVSANHDR;
static struct g_part_uuid_alias {
struct uuid *uuid;
int alias;
int mbrtype;
} gpt_uuid_alias_match[] = {
{ &gpt_uuid_apple_apfs, G_PART_ALIAS_APPLE_APFS, 0 },
{ &gpt_uuid_apple_boot, G_PART_ALIAS_APPLE_BOOT, 0xab },
{ &gpt_uuid_apple_core_storage, G_PART_ALIAS_APPLE_CORE_STORAGE, 0 },
{ &gpt_uuid_apple_hfs, G_PART_ALIAS_APPLE_HFS, 0xaf },
{ &gpt_uuid_apple_label, G_PART_ALIAS_APPLE_LABEL, 0 },
{ &gpt_uuid_apple_raid, G_PART_ALIAS_APPLE_RAID, 0 },
{ &gpt_uuid_apple_raid_offline, G_PART_ALIAS_APPLE_RAID_OFFLINE, 0 },
{ &gpt_uuid_apple_tv_recovery, G_PART_ALIAS_APPLE_TV_RECOVERY, 0 },
{ &gpt_uuid_apple_ufs, G_PART_ALIAS_APPLE_UFS, 0 },
{ &gpt_uuid_apple_zfs, G_PART_ALIAS_APPLE_ZFS, 0 },
{ &gpt_uuid_bios_boot, G_PART_ALIAS_BIOS_BOOT, 0 },
{ &gpt_uuid_chromeos_firmware, G_PART_ALIAS_CHROMEOS_FIRMWARE, 0 },
{ &gpt_uuid_chromeos_kernel, G_PART_ALIAS_CHROMEOS_KERNEL, 0 },
{ &gpt_uuid_chromeos_reserved, G_PART_ALIAS_CHROMEOS_RESERVED, 0 },
{ &gpt_uuid_chromeos_root, G_PART_ALIAS_CHROMEOS_ROOT, 0 },
{ &gpt_uuid_dfbsd_ccd, G_PART_ALIAS_DFBSD_CCD, 0 },
{ &gpt_uuid_dfbsd_hammer, G_PART_ALIAS_DFBSD_HAMMER, 0 },
{ &gpt_uuid_dfbsd_hammer2, G_PART_ALIAS_DFBSD_HAMMER2, 0 },
{ &gpt_uuid_dfbsd_label32, G_PART_ALIAS_DFBSD, 0xa5 },
{ &gpt_uuid_dfbsd_label64, G_PART_ALIAS_DFBSD64, 0xa5 },
{ &gpt_uuid_dfbsd_legacy, G_PART_ALIAS_DFBSD_LEGACY, 0 },
{ &gpt_uuid_dfbsd_swap, G_PART_ALIAS_DFBSD_SWAP, 0 },
{ &gpt_uuid_dfbsd_ufs1, G_PART_ALIAS_DFBSD_UFS, 0 },
{ &gpt_uuid_dfbsd_vinum, G_PART_ALIAS_DFBSD_VINUM, 0 },
{ &gpt_uuid_efi, G_PART_ALIAS_EFI, 0xee },
{ &gpt_uuid_freebsd, G_PART_ALIAS_FREEBSD, 0xa5 },
{ &gpt_uuid_freebsd_boot, G_PART_ALIAS_FREEBSD_BOOT, 0 },
{ &gpt_uuid_freebsd_nandfs, G_PART_ALIAS_FREEBSD_NANDFS, 0 },
{ &gpt_uuid_freebsd_swap, G_PART_ALIAS_FREEBSD_SWAP, 0 },
{ &gpt_uuid_freebsd_ufs, G_PART_ALIAS_FREEBSD_UFS, 0 },
{ &gpt_uuid_freebsd_vinum, G_PART_ALIAS_FREEBSD_VINUM, 0 },
{ &gpt_uuid_freebsd_zfs, G_PART_ALIAS_FREEBSD_ZFS, 0 },
{ &gpt_uuid_linux_data, G_PART_ALIAS_LINUX_DATA, 0x0b },
{ &gpt_uuid_linux_lvm, G_PART_ALIAS_LINUX_LVM, 0 },
{ &gpt_uuid_linux_raid, G_PART_ALIAS_LINUX_RAID, 0 },
{ &gpt_uuid_linux_swap, G_PART_ALIAS_LINUX_SWAP, 0 },
{ &gpt_uuid_mbr, G_PART_ALIAS_MBR, 0 },
{ &gpt_uuid_ms_basic_data, G_PART_ALIAS_MS_BASIC_DATA, 0x0b },
{ &gpt_uuid_ms_ldm_data, G_PART_ALIAS_MS_LDM_DATA, 0 },
{ &gpt_uuid_ms_ldm_metadata, G_PART_ALIAS_MS_LDM_METADATA, 0 },
{ &gpt_uuid_ms_recovery, G_PART_ALIAS_MS_RECOVERY, 0 },
{ &gpt_uuid_ms_reserved, G_PART_ALIAS_MS_RESERVED, 0 },
{ &gpt_uuid_ms_spaces, G_PART_ALIAS_MS_SPACES, 0 },
{ &gpt_uuid_netbsd_ccd, G_PART_ALIAS_NETBSD_CCD, 0 },
{ &gpt_uuid_netbsd_cgd, G_PART_ALIAS_NETBSD_CGD, 0 },
{ &gpt_uuid_netbsd_ffs, G_PART_ALIAS_NETBSD_FFS, 0 },
{ &gpt_uuid_netbsd_lfs, G_PART_ALIAS_NETBSD_LFS, 0 },
{ &gpt_uuid_netbsd_raid, G_PART_ALIAS_NETBSD_RAID, 0 },
{ &gpt_uuid_netbsd_swap, G_PART_ALIAS_NETBSD_SWAP, 0 },
{ &gpt_uuid_openbsd_data, G_PART_ALIAS_OPENBSD_DATA, 0 },
{ &gpt_uuid_prep_boot, G_PART_ALIAS_PREP_BOOT, 0x41 },
{ &gpt_uuid_solaris_boot, G_PART_ALIAS_SOLARIS_BOOT, 0 },
{ &gpt_uuid_solaris_root, G_PART_ALIAS_SOLARIS_ROOT, 0 },
{ &gpt_uuid_solaris_swap, G_PART_ALIAS_SOLARIS_SWAP, 0 },
{ &gpt_uuid_solaris_backup, G_PART_ALIAS_SOLARIS_BACKUP, 0 },
{ &gpt_uuid_solaris_var, G_PART_ALIAS_SOLARIS_VAR, 0 },
{ &gpt_uuid_solaris_home, G_PART_ALIAS_SOLARIS_HOME, 0 },
{ &gpt_uuid_solaris_altsec, G_PART_ALIAS_SOLARIS_ALTSEC, 0 },
{ &gpt_uuid_solaris_reserved, G_PART_ALIAS_SOLARIS_RESERVED, 0 },
{ &gpt_uuid_vmfs, G_PART_ALIAS_VMFS, 0 },
{ &gpt_uuid_vmkdiag, G_PART_ALIAS_VMKDIAG, 0 },
{ &gpt_uuid_vmreserved, G_PART_ALIAS_VMRESERVED, 0 },
{ &gpt_uuid_vmvsanhdr, G_PART_ALIAS_VMVSANHDR, 0 },
{ NULL, 0, 0 }
};
static int
gpt_write_mbr_entry(u_char *mbr, int idx, int typ, quad_t start,
quad_t end)
{
if (typ == 0 || start > UINT32_MAX || end > UINT32_MAX)
return (EINVAL);
mbr += DOSPARTOFF + idx * DOSPARTSIZE;
mbr[0] = 0;
if (start == 1) {
/*
* Treat the PMBR partition specially to maximize
* interoperability with BIOSes.
*/
mbr[1] = mbr[3] = 0;
mbr[2] = 2;
} else
mbr[1] = mbr[2] = mbr[3] = 0xff;
mbr[4] = typ;
mbr[5] = mbr[6] = mbr[7] = 0xff;
le32enc(mbr + 8, (uint32_t)start);
le32enc(mbr + 12, (uint32_t)(end - start + 1));
return (0);
}
static int
gpt_map_type(struct uuid *t)
{
struct g_part_uuid_alias *uap;
for (uap = &gpt_uuid_alias_match[0]; uap->uuid; uap++) {
if (EQUUID(t, uap->uuid))
return (uap->mbrtype);
}
return (0);
}
static void
gpt_create_pmbr(struct g_part_gpt_table *table, struct g_provider *pp)
{
bzero(table->mbr + DOSPARTOFF, DOSPARTSIZE * NDOSPART);
gpt_write_mbr_entry(table->mbr, 0, 0xee, 1,
MIN(pp->mediasize / pp->sectorsize - 1, UINT32_MAX));
le16enc(table->mbr + DOSMAGICOFFSET, DOSMAGIC);
}
/*
* Under Boot Camp the PMBR partition (type 0xEE) doesn't cover the
* whole disk anymore. Rather, it covers the GPT table and the EFI
* system partition only. This way the HFS+ partition and any FAT
* partitions can be added to the MBR without creating an overlap.
*/
static int
gpt_is_bootcamp(struct g_part_gpt_table *table, const char *provname)
{
uint8_t *p;
p = table->mbr + DOSPARTOFF;
if (p[4] != 0xee || le32dec(p + 8) != 1)
return (0);
p += DOSPARTSIZE;
if (p[4] != 0xaf)
return (0);
printf("GEOM: %s: enabling Boot Camp\n", provname);
return (1);
}
static void
gpt_update_bootcamp(struct g_part_table *basetable, struct g_provider *pp)
{
struct g_part_entry *baseentry;
struct g_part_gpt_entry *entry;
struct g_part_gpt_table *table;
int bootable, error, index, slices, typ;
table = (struct g_part_gpt_table *)basetable;
bootable = -1;
for (index = 0; index < NDOSPART; index++) {
if (table->mbr[DOSPARTOFF + DOSPARTSIZE * index])
bootable = index;
}
bzero(table->mbr + DOSPARTOFF, DOSPARTSIZE * NDOSPART);
slices = 0;
LIST_FOREACH(baseentry, &basetable->gpt_entry, gpe_entry) {
if (baseentry->gpe_deleted)
continue;
index = baseentry->gpe_index - 1;
if (index >= NDOSPART)
continue;
entry = (struct g_part_gpt_entry *)baseentry;
switch (index) {
case 0: /* This must be the EFI system partition. */
if (!EQUUID(&entry->ent.ent_type, &gpt_uuid_efi))
goto disable;
error = gpt_write_mbr_entry(table->mbr, index, 0xee,
1ull, entry->ent.ent_lba_end);
break;
case 1: /* This must be the HFS+ partition. */
if (!EQUUID(&entry->ent.ent_type, &gpt_uuid_apple_hfs))
goto disable;
error = gpt_write_mbr_entry(table->mbr, index, 0xaf,
entry->ent.ent_lba_start, entry->ent.ent_lba_end);
break;
default:
typ = gpt_map_type(&entry->ent.ent_type);
error = gpt_write_mbr_entry(table->mbr, index, typ,
entry->ent.ent_lba_start, entry->ent.ent_lba_end);
break;
}
if (error)
continue;
if (index == bootable)
table->mbr[DOSPARTOFF + DOSPARTSIZE * index] = 0x80;
slices |= 1 << index;
}
if ((slices & 3) == 3)
return;
disable:
table->bootcamp = 0;
gpt_create_pmbr(table, pp);
}
static struct gpt_hdr *
gpt_read_hdr(struct g_part_gpt_table *table, struct g_consumer *cp,
enum gpt_elt elt)
{
struct gpt_hdr *buf, *hdr;
struct g_provider *pp;
quad_t lba, last;
int error;
uint32_t crc, sz;
pp = cp->provider;
last = (pp->mediasize / pp->sectorsize) - 1;
table->state[elt] = GPT_STATE_MISSING;
/*
* If the primary header is valid look for secondary
* header in AlternateLBA, otherwise in the last medium's LBA.
*/
if (elt == GPT_ELT_SECHDR) {
if (table->state[GPT_ELT_PRIHDR] != GPT_STATE_OK)
table->lba[elt] = last;
} else
table->lba[elt] = 1;
buf = g_read_data(cp, table->lba[elt] * pp->sectorsize, pp->sectorsize,
&error);
if (buf == NULL)
return (NULL);
hdr = NULL;
if (memcmp(buf->hdr_sig, GPT_HDR_SIG, sizeof(buf->hdr_sig)) != 0)
goto fail;
table->state[elt] = GPT_STATE_CORRUPT;
sz = le32toh(buf->hdr_size);
if (sz < 92 || sz > pp->sectorsize)
goto fail;
hdr = g_malloc(sz, M_WAITOK | M_ZERO);
bcopy(buf, hdr, sz);
hdr->hdr_size = sz;
crc = le32toh(buf->hdr_crc_self);
buf->hdr_crc_self = 0;
if (crc32(buf, sz) != crc)
goto fail;
hdr->hdr_crc_self = crc;
table->state[elt] = GPT_STATE_INVALID;
hdr->hdr_revision = le32toh(buf->hdr_revision);
if (hdr->hdr_revision < GPT_HDR_REVISION)
goto fail;
hdr->hdr_lba_self = le64toh(buf->hdr_lba_self);
if (hdr->hdr_lba_self != table->lba[elt])
goto fail;
hdr->hdr_lba_alt = le64toh(buf->hdr_lba_alt);
if (hdr->hdr_lba_alt == hdr->hdr_lba_self)
goto fail;
if (hdr->hdr_lba_alt > last && geom_part_check_integrity)
goto fail;
/* Check the managed area. */
hdr->hdr_lba_start = le64toh(buf->hdr_lba_start);
if (hdr->hdr_lba_start < 2 || hdr->hdr_lba_start >= last)
goto fail;
hdr->hdr_lba_end = le64toh(buf->hdr_lba_end);
if (hdr->hdr_lba_end < hdr->hdr_lba_start || hdr->hdr_lba_end >= last)
goto fail;
/* Check the table location and size of the table. */
hdr->hdr_entries = le32toh(buf->hdr_entries);
hdr->hdr_entsz = le32toh(buf->hdr_entsz);
if (hdr->hdr_entries == 0 || hdr->hdr_entsz < 128 ||
(hdr->hdr_entsz & 7) != 0)
goto fail;
hdr->hdr_lba_table = le64toh(buf->hdr_lba_table);
if (hdr->hdr_lba_table < 2 || hdr->hdr_lba_table >= last)
goto fail;
if (hdr->hdr_lba_table >= hdr->hdr_lba_start &&
hdr->hdr_lba_table <= hdr->hdr_lba_end)
goto fail;
lba = hdr->hdr_lba_table +
howmany(hdr->hdr_entries * hdr->hdr_entsz, pp->sectorsize) - 1;
if (lba >= last)
goto fail;
if (lba >= hdr->hdr_lba_start && lba <= hdr->hdr_lba_end)
goto fail;
table->state[elt] = GPT_STATE_OK;
le_uuid_dec(&buf->hdr_uuid, &hdr->hdr_uuid);
hdr->hdr_crc_table = le32toh(buf->hdr_crc_table);
/* save LBA for secondary header */
if (elt == GPT_ELT_PRIHDR)
table->lba[GPT_ELT_SECHDR] = hdr->hdr_lba_alt;
g_free(buf);
return (hdr);
fail:
if (hdr != NULL)
g_free(hdr);
g_free(buf);
return (NULL);
}
static struct gpt_ent *
gpt_read_tbl(struct g_part_gpt_table *table, struct g_consumer *cp,
enum gpt_elt elt, struct gpt_hdr *hdr)
{
struct g_provider *pp;
struct gpt_ent *ent, *tbl;
char *buf, *p;
unsigned int idx, sectors, tblsz, size;
int error;
if (hdr == NULL)
return (NULL);
pp = cp->provider;
table->lba[elt] = hdr->hdr_lba_table;
table->state[elt] = GPT_STATE_MISSING;
tblsz = hdr->hdr_entries * hdr->hdr_entsz;
sectors = howmany(tblsz, pp->sectorsize);
buf = g_malloc(sectors * pp->sectorsize, M_WAITOK | M_ZERO);
for (idx = 0; idx < sectors; idx += maxphys / pp->sectorsize) {
size = (sectors - idx > maxphys / pp->sectorsize) ? maxphys:
(sectors - idx) * pp->sectorsize;
p = g_read_data(cp, (table->lba[elt] + idx) * pp->sectorsize,
size, &error);
if (p == NULL) {
g_free(buf);
return (NULL);
}
bcopy(p, buf + idx * pp->sectorsize, size);
g_free(p);
}
table->state[elt] = GPT_STATE_CORRUPT;
if (crc32(buf, tblsz) != hdr->hdr_crc_table) {
g_free(buf);
return (NULL);
}
table->state[elt] = GPT_STATE_OK;
tbl = g_malloc(hdr->hdr_entries * sizeof(struct gpt_ent),
M_WAITOK | M_ZERO);
for (idx = 0, ent = tbl, p = buf;
idx < hdr->hdr_entries;
idx++, ent++, p += hdr->hdr_entsz) {
le_uuid_dec(p, &ent->ent_type);
le_uuid_dec(p + 16, &ent->ent_uuid);
ent->ent_lba_start = le64dec(p + 32);
ent->ent_lba_end = le64dec(p + 40);
ent->ent_attr = le64dec(p + 48);
/* Keep UTF-16 in little-endian. */
bcopy(p + 56, ent->ent_name, sizeof(ent->ent_name));
}
g_free(buf);
return (tbl);
}
static int
gpt_matched_hdrs(struct gpt_hdr *pri, struct gpt_hdr *sec)
{
if (pri == NULL || sec == NULL)
return (0);
if (!EQUUID(&pri->hdr_uuid, &sec->hdr_uuid))
return (0);
return ((pri->hdr_revision == sec->hdr_revision &&
pri->hdr_size == sec->hdr_size &&
pri->hdr_lba_start == sec->hdr_lba_start &&
pri->hdr_lba_end == sec->hdr_lba_end &&
pri->hdr_entries == sec->hdr_entries &&
pri->hdr_entsz == sec->hdr_entsz &&
pri->hdr_crc_table == sec->hdr_crc_table) ? 1 : 0);
}
static int
gpt_parse_type(const char *type, struct uuid *uuid)
{
struct uuid tmp;
const char *alias;
int error;
struct g_part_uuid_alias *uap;
if (type[0] == '!') {
error = parse_uuid(type + 1, &tmp);
if (error)
return (error);
if (EQUUID(&tmp, &gpt_uuid_unused))
return (EINVAL);
*uuid = tmp;
return (0);
}
for (uap = &gpt_uuid_alias_match[0]; uap->uuid; uap++) {
alias = g_part_alias_name(uap->alias);
if (!strcasecmp(type, alias)) {
*uuid = *uap->uuid;
return (0);
}
}
return (EINVAL);
}
static int
g_part_gpt_add(struct g_part_table *basetable, struct g_part_entry *baseentry,
struct g_part_parms *gpp)
{
struct g_part_gpt_entry *entry;
int error;
entry = (struct g_part_gpt_entry *)baseentry;
error = gpt_parse_type(gpp->gpp_type, &entry->ent.ent_type);
if (error)
return (error);
kern_uuidgen(&entry->ent.ent_uuid, 1);
entry->ent.ent_lba_start = baseentry->gpe_start;
entry->ent.ent_lba_end = baseentry->gpe_end;
if (baseentry->gpe_deleted) {
entry->ent.ent_attr = 0;
bzero(entry->ent.ent_name, sizeof(entry->ent.ent_name));
}
if (gpp->gpp_parms & G_PART_PARM_LABEL)
g_gpt_utf8_to_utf16(gpp->gpp_label, entry->ent.ent_name,
sizeof(entry->ent.ent_name) /
sizeof(entry->ent.ent_name[0]));
return (0);
}
static int
g_part_gpt_bootcode(struct g_part_table *basetable, struct g_part_parms *gpp)
{
struct g_part_gpt_table *table;
size_t codesz;
codesz = DOSPARTOFF;
table = (struct g_part_gpt_table *)basetable;
bzero(table->mbr, codesz);
codesz = MIN(codesz, gpp->gpp_codesize);
if (codesz > 0)
bcopy(gpp->gpp_codeptr, table->mbr, codesz);
return (0);
}
static int
g_part_gpt_create(struct g_part_table *basetable, struct g_part_parms *gpp)
{
struct g_provider *pp;
struct g_part_gpt_table *table;
size_t tblsz;
/* Our depth should be 0 unless nesting was explicitly enabled. */
if (!allow_nesting && basetable->gpt_depth != 0)
return (ENXIO);
table = (struct g_part_gpt_table *)basetable;
pp = gpp->gpp_provider;
tblsz = howmany(basetable->gpt_entries * sizeof(struct gpt_ent),
pp->sectorsize);
if (pp->sectorsize < MBRSIZE ||
pp->mediasize < (3 + 2 * tblsz + basetable->gpt_entries) *
pp->sectorsize)
return (ENOSPC);
gpt_create_pmbr(table, pp);
/* Allocate space for the header */
table->hdr = g_malloc(sizeof(struct gpt_hdr), M_WAITOK | M_ZERO);
bcopy(GPT_HDR_SIG, table->hdr->hdr_sig, sizeof(table->hdr->hdr_sig));
table->hdr->hdr_revision = GPT_HDR_REVISION;
table->hdr->hdr_size = offsetof(struct gpt_hdr, padding);
kern_uuidgen(&table->hdr->hdr_uuid, 1);
table->hdr->hdr_entries = basetable->gpt_entries;
table->hdr->hdr_entsz = sizeof(struct gpt_ent);
g_gpt_set_defaults(basetable, pp);
return (0);
}
static int
g_part_gpt_destroy(struct g_part_table *basetable, struct g_part_parms *gpp)
{
struct g_part_gpt_table *table;
struct g_provider *pp;
table = (struct g_part_gpt_table *)basetable;
pp = LIST_FIRST(&basetable->gpt_gp->consumer)->provider;
g_free(table->hdr);
table->hdr = NULL;
/*
* Wipe the first 2 sectors and last one to clear the partitioning.
* Wipe sectors only if they have valid metadata.
*/
if (table->state[GPT_ELT_PRIHDR] == GPT_STATE_OK)
basetable->gpt_smhead |= 3;
if (table->state[GPT_ELT_SECHDR] == GPT_STATE_OK &&
table->lba[GPT_ELT_SECHDR] == pp->mediasize / pp->sectorsize - 1)
basetable->gpt_smtail |= 1;
return (0);
}
static void
g_part_gpt_dumpconf(struct g_part_table *table, struct g_part_entry *baseentry,
struct sbuf *sb, const char *indent)
{
struct g_part_gpt_entry *entry;
entry = (struct g_part_gpt_entry *)baseentry;
if (indent == NULL) {
/* conftxt: libdisk compatibility */
sbuf_cat(sb, " xs GPT xt ");
sbuf_printf_uuid(sb, &entry->ent.ent_type);
} else if (entry != NULL) {
/* confxml: partition entry information */
sbuf_printf(sb, "%s<label>", indent);
g_gpt_printf_utf16(sb, entry->ent.ent_name,
sizeof(entry->ent.ent_name) >> 1);
sbuf_cat(sb, "</label>\n");
if (entry->ent.ent_attr & GPT_ENT_ATTR_BOOTME)
sbuf_printf(sb, "%s<attrib>bootme</attrib>\n", indent);
if (entry->ent.ent_attr & GPT_ENT_ATTR_BOOTONCE) {
sbuf_printf(sb, "%s<attrib>bootonce</attrib>\n",
indent);
}
if (entry->ent.ent_attr & GPT_ENT_ATTR_BOOTFAILED) {
sbuf_printf(sb, "%s<attrib>bootfailed</attrib>\n",
indent);
}
sbuf_printf(sb, "%s<rawtype>", indent);
sbuf_printf_uuid(sb, &entry->ent.ent_type);
sbuf_cat(sb, "</rawtype>\n");
sbuf_printf(sb, "%s<rawuuid>", indent);
sbuf_printf_uuid(sb, &entry->ent.ent_uuid);
sbuf_cat(sb, "</rawuuid>\n");
sbuf_printf(sb, "%s<efimedia>", indent);
sbuf_printf(sb, "HD(%d,GPT,", entry->base.gpe_index);
sbuf_printf_uuid(sb, &entry->ent.ent_uuid);
sbuf_printf(sb, ",%#jx,%#jx)", (intmax_t)entry->base.gpe_start,
(intmax_t)(entry->base.gpe_end - entry->base.gpe_start + 1));
sbuf_cat(sb, "</efimedia>\n");
} else {
/* confxml: scheme information */
}
}
static int
g_part_gpt_dumpto(struct g_part_table *table, struct g_part_entry *baseentry)
{
struct g_part_gpt_entry *entry;
entry = (struct g_part_gpt_entry *)baseentry;
return ((EQUUID(&entry->ent.ent_type, &gpt_uuid_freebsd_swap) ||
EQUUID(&entry->ent.ent_type, &gpt_uuid_linux_swap) ||
EQUUID(&entry->ent.ent_type, &gpt_uuid_dfbsd_swap)) ? 1 : 0);
}
static int
g_part_gpt_modify(struct g_part_table *basetable,
struct g_part_entry *baseentry, struct g_part_parms *gpp)
{
struct g_part_gpt_entry *entry;
int error;
entry = (struct g_part_gpt_entry *)baseentry;
if (gpp->gpp_parms & G_PART_PARM_TYPE) {
error = gpt_parse_type(gpp->gpp_type, &entry->ent.ent_type);
if (error)
return (error);
}
if (gpp->gpp_parms & G_PART_PARM_LABEL)
g_gpt_utf8_to_utf16(gpp->gpp_label, entry->ent.ent_name,
sizeof(entry->ent.ent_name) /
sizeof(entry->ent.ent_name[0]));
return (0);
}
static int
g_part_gpt_resize(struct g_part_table *basetable,
struct g_part_entry *baseentry, struct g_part_parms *gpp)
{
struct g_part_gpt_entry *entry;
if (baseentry == NULL)
return (g_part_gpt_recover(basetable));
entry = (struct g_part_gpt_entry *)baseentry;
baseentry->gpe_end = baseentry->gpe_start + gpp->gpp_size - 1;
entry->ent.ent_lba_end = baseentry->gpe_end;
return (0);
}
static const char *
g_part_gpt_name(struct g_part_table *table, struct g_part_entry *baseentry,
char *buf, size_t bufsz)
{
struct g_part_gpt_entry *entry;
char c;
entry = (struct g_part_gpt_entry *)baseentry;
c = (EQUUID(&entry->ent.ent_type, &gpt_uuid_freebsd)) ? 's' : 'p';
snprintf(buf, bufsz, "%c%d", c, baseentry->gpe_index);
return (buf);
}
static int
g_part_gpt_probe(struct g_part_table *table, struct g_consumer *cp)
{
struct g_provider *pp;
u_char *buf;
int error, index, pri, res;
/* Our depth should be 0 unless nesting was explicitly enabled. */
if (!allow_nesting && table->gpt_depth != 0)
return (ENXIO);
pp = cp->provider;
/*
* Sanity-check the provider. Since the first sector on the provider
* must be a PMBR and a PMBR is 512 bytes large, the sector size
* must be at least 512 bytes. Also, since the theoretical minimum
* number of sectors needed by GPT is 6, any medium that has less
* than 6 sectors is never going to be able to hold a GPT. The
* number 6 comes from:
* 1 sector for the PMBR
* 2 sectors for the GPT headers (each 1 sector)
* 2 sectors for the GPT tables (each 1 sector)
* 1 sector for an actual partition
* It's better to catch this pathological case early than behaving
* pathologically later on...
*/
if (pp->sectorsize < MBRSIZE || pp->mediasize < 6 * pp->sectorsize)
return (ENOSPC);
/*
* Check that there's a MBR or a PMBR. If it's a PMBR, we return
* as the highest priority on a match, otherwise we assume some
* GPT-unaware tool has destroyed the GPT by recreating a MBR and
* we really want the MBR scheme to take precedence.
*/
buf = g_read_data(cp, 0L, pp->sectorsize, &error);
if (buf == NULL)
return (error);
res = le16dec(buf + DOSMAGICOFFSET);
pri = G_PART_PROBE_PRI_LOW;
if (res == DOSMAGIC) {
for (index = 0; index < NDOSPART; index++) {
if (buf[DOSPARTOFF + DOSPARTSIZE * index + 4] == 0xee)
pri = G_PART_PROBE_PRI_HIGH;
}
g_free(buf);
/* Check that there's a primary header. */
buf = g_read_data(cp, pp->sectorsize, pp->sectorsize, &error);
if (buf == NULL)
return (error);
res = memcmp(buf, GPT_HDR_SIG, 8);
g_free(buf);
if (res == 0)
return (pri);
} else
g_free(buf);
/* No primary? Check that there's a secondary. */
buf = g_read_data(cp, pp->mediasize - pp->sectorsize, pp->sectorsize,
&error);
if (buf == NULL)
return (error);
res = memcmp(buf, GPT_HDR_SIG, 8);
g_free(buf);
return ((res == 0) ? pri : ENXIO);
}
static int
g_part_gpt_read(struct g_part_table *basetable, struct g_consumer *cp)
{
struct gpt_hdr *prihdr, *sechdr;
struct gpt_ent *tbl, *pritbl, *sectbl;
struct g_provider *pp;
struct g_part_gpt_table *table;
struct g_part_gpt_entry *entry;
u_char *buf;
uint64_t last;
int error, index;
table = (struct g_part_gpt_table *)basetable;
pp = cp->provider;
last = (pp->mediasize / pp->sectorsize) - 1;
/* Read the PMBR */
buf = g_read_data(cp, 0, pp->sectorsize, &error);
if (buf == NULL)
return (error);
bcopy(buf, table->mbr, MBRSIZE);
g_free(buf);
/* Read the primary header and table. */
prihdr = gpt_read_hdr(table, cp, GPT_ELT_PRIHDR);
if (table->state[GPT_ELT_PRIHDR] == GPT_STATE_OK) {
pritbl = gpt_read_tbl(table, cp, GPT_ELT_PRITBL, prihdr);
} else {
table->state[GPT_ELT_PRITBL] = GPT_STATE_MISSING;
pritbl = NULL;
}
/* Read the secondary header and table. */
sechdr = gpt_read_hdr(table, cp, GPT_ELT_SECHDR);
if (table->state[GPT_ELT_SECHDR] == GPT_STATE_OK) {
sectbl = gpt_read_tbl(table, cp, GPT_ELT_SECTBL, sechdr);
} else {
table->state[GPT_ELT_SECTBL] = GPT_STATE_MISSING;
sectbl = NULL;
}
/* Fail if we haven't got any good tables at all. */
if (table->state[GPT_ELT_PRITBL] != GPT_STATE_OK &&
table->state[GPT_ELT_SECTBL] != GPT_STATE_OK) {
printf("GEOM: %s: corrupt or invalid GPT detected.\n",
pp->name);
printf("GEOM: %s: GPT rejected -- may not be recoverable.\n",
pp->name);
if (prihdr != NULL)
g_free(prihdr);
if (pritbl != NULL)
g_free(pritbl);
if (sechdr != NULL)
g_free(sechdr);
if (sectbl != NULL)
g_free(sectbl);
return (EINVAL);
}
/*
* If both headers are good but they disagree with each other,
* then invalidate one. We prefer to keep the primary header,
* unless the primary table is corrupt.
*/
if (table->state[GPT_ELT_PRIHDR] == GPT_STATE_OK &&
table->state[GPT_ELT_SECHDR] == GPT_STATE_OK &&
!gpt_matched_hdrs(prihdr, sechdr)) {
if (table->state[GPT_ELT_PRITBL] == GPT_STATE_OK) {
table->state[GPT_ELT_SECHDR] = GPT_STATE_INVALID;
table->state[GPT_ELT_SECTBL] = GPT_STATE_MISSING;
g_free(sechdr);
sechdr = NULL;
} else {
table->state[GPT_ELT_PRIHDR] = GPT_STATE_INVALID;
table->state[GPT_ELT_PRITBL] = GPT_STATE_MISSING;
g_free(prihdr);
prihdr = NULL;
}
}
if (table->state[GPT_ELT_PRITBL] != GPT_STATE_OK) {
printf("GEOM: %s: the primary GPT table is corrupt or "
"invalid.\n", pp->name);
printf("GEOM: %s: using the secondary instead -- recovery "
"strongly advised.\n", pp->name);
table->hdr = sechdr;
basetable->gpt_corrupt = 1;
if (prihdr != NULL)
g_free(prihdr);
tbl = sectbl;
if (pritbl != NULL)
g_free(pritbl);
} else {
if (table->state[GPT_ELT_SECTBL] != GPT_STATE_OK) {
printf("GEOM: %s: the secondary GPT table is corrupt "
"or invalid.\n", pp->name);
printf("GEOM: %s: using the primary only -- recovery "
"suggested.\n", pp->name);
basetable->gpt_corrupt = 1;
} else if (table->lba[GPT_ELT_SECHDR] != last) {
printf( "GEOM: %s: the secondary GPT header is not in "
"the last LBA.\n", pp->name);
basetable->gpt_corrupt = 1;
}
table->hdr = prihdr;
if (sechdr != NULL)
g_free(sechdr);
tbl = pritbl;
if (sectbl != NULL)
g_free(sectbl);
}
basetable->gpt_first = table->hdr->hdr_lba_start;
basetable->gpt_last = table->hdr->hdr_lba_end;
basetable->gpt_entries = table->hdr->hdr_entries;
for (index = basetable->gpt_entries - 1; index >= 0; index--) {
if (EQUUID(&tbl[index].ent_type, &gpt_uuid_unused))
continue;
entry = (struct g_part_gpt_entry *)g_part_new_entry(
basetable, index + 1, tbl[index].ent_lba_start,
tbl[index].ent_lba_end);
entry->ent = tbl[index];
}
g_free(tbl);
/*
* Under Mac OS X, the MBR mirrors the first 4 GPT partitions
* if (and only if) any FAT32 or FAT16 partitions have been
* created. This happens irrespective of whether Boot Camp is
* used/enabled, though it's generally understood to be done
* to support legacy Windows under Boot Camp. We refer to this
* mirroring simply as Boot Camp. We try to detect Boot Camp
* so that we can update the MBR if and when GPT changes have
* been made. Note that we do not enable Boot Camp if not
* previously enabled because we can't assume that we're on a
* Mac alongside Mac OS X.
*/
table->bootcamp = gpt_is_bootcamp(table, pp->name);
return (0);
}
static int
g_part_gpt_recover(struct g_part_table *basetable)
{
struct g_part_gpt_table *table;
struct g_provider *pp;
table = (struct g_part_gpt_table *)basetable;
pp = LIST_FIRST(&basetable->gpt_gp->consumer)->provider;
gpt_create_pmbr(table, pp);
g_gpt_set_defaults(basetable, pp);
basetable->gpt_corrupt = 0;
return (0);
}
static int
g_part_gpt_setunset(struct g_part_table *basetable,
struct g_part_entry *baseentry, const char *attrib, unsigned int set)
{
struct g_part_gpt_entry *entry;
struct g_part_gpt_table *table;
struct g_provider *pp;
uint8_t *p;
uint64_t attr;
int i;
table = (struct g_part_gpt_table *)basetable;
entry = (struct g_part_gpt_entry *)baseentry;
if (strcasecmp(attrib, "active") == 0) {
if (table->bootcamp) {
/* The active flag must be set on a valid entry. */
if (entry == NULL)
return (ENXIO);
if (baseentry->gpe_index > NDOSPART)
return (EINVAL);
for (i = 0; i < NDOSPART; i++) {
p = &table->mbr[DOSPARTOFF + i * DOSPARTSIZE];
p[0] = (i == baseentry->gpe_index - 1)
? ((set) ? 0x80 : 0) : 0;
}
} else {
/* The PMBR is marked as active without an entry. */
if (entry != NULL)
return (ENXIO);
for (i = 0; i < NDOSPART; i++) {
p = &table->mbr[DOSPARTOFF + i * DOSPARTSIZE];
p[0] = (p[4] == 0xee) ? ((set) ? 0x80 : 0) : 0;
}
}
return (0);
} else if (strcasecmp(attrib, "lenovofix") == 0) {
/*
* Write the 0xee GPT entry to slot #1 (2nd slot) in the pMBR.
* This workaround allows Lenovo X220, T420, T520, etc to boot
* from GPT Partitions in BIOS mode.
*/
if (entry != NULL)
return (ENXIO);
pp = LIST_FIRST(&basetable->gpt_gp->consumer)->provider;
bzero(table->mbr + DOSPARTOFF, DOSPARTSIZE * NDOSPART);
gpt_write_mbr_entry(table->mbr, ((set) ? 1 : 0), 0xee, 1,
MIN(pp->mediasize / pp->sectorsize - 1, UINT32_MAX));
return (0);
}
if (entry == NULL)
return (ENODEV);
attr = 0;
if (strcasecmp(attrib, "bootme") == 0) {
attr |= GPT_ENT_ATTR_BOOTME;
} else if (strcasecmp(attrib, "bootonce") == 0) {
attr |= GPT_ENT_ATTR_BOOTONCE;
if (set)
attr |= GPT_ENT_ATTR_BOOTME;
} else if (strcasecmp(attrib, "bootfailed") == 0) {
/*
* It should only be possible to unset BOOTFAILED, but it might
* be useful for test purposes to also be able to set it.
*/
attr |= GPT_ENT_ATTR_BOOTFAILED;
}
if (attr == 0)
return (EINVAL);
if (set)
attr = entry->ent.ent_attr | attr;
else
attr = entry->ent.ent_attr & ~attr;
if (attr != entry->ent.ent_attr) {
entry->ent.ent_attr = attr;
if (!baseentry->gpe_created)
baseentry->gpe_modified = 1;
}
return (0);
}
static const char *
g_part_gpt_type(struct g_part_table *basetable, struct g_part_entry *baseentry,
char *buf, size_t bufsz)
{
struct g_part_gpt_entry *entry;
struct uuid *type;
struct g_part_uuid_alias *uap;
entry = (struct g_part_gpt_entry *)baseentry;
type = &entry->ent.ent_type;
for (uap = &gpt_uuid_alias_match[0]; uap->uuid; uap++)
if (EQUUID(type, uap->uuid))
return (g_part_alias_name(uap->alias));
buf[0] = '!';
snprintf_uuid(buf + 1, bufsz - 1, type);
return (buf);
}
static int
g_part_gpt_write(struct g_part_table *basetable, struct g_consumer *cp)
{
unsigned char *buf, *bp;
struct g_provider *pp;
struct g_part_entry *baseentry;
struct g_part_gpt_entry *entry;
struct g_part_gpt_table *table;
size_t tblsz;
uint32_t crc;
int error, index;
pp = cp->provider;
table = (struct g_part_gpt_table *)basetable;
tblsz = howmany(table->hdr->hdr_entries * table->hdr->hdr_entsz,
pp->sectorsize);
/* Reconstruct the MBR from the GPT if under Boot Camp. */
if (table->bootcamp)
gpt_update_bootcamp(basetable, pp);
/* Write the PMBR */
buf = g_malloc(pp->sectorsize, M_WAITOK | M_ZERO);
bcopy(table->mbr, buf, MBRSIZE);
error = g_write_data(cp, 0, buf, pp->sectorsize);
g_free(buf);
if (error)
return (error);
/* Allocate space for the header and entries. */
buf = g_malloc((tblsz + 1) * pp->sectorsize, M_WAITOK | M_ZERO);
memcpy(buf, table->hdr->hdr_sig, sizeof(table->hdr->hdr_sig));
le32enc(buf + 8, table->hdr->hdr_revision);
le32enc(buf + 12, table->hdr->hdr_size);
le64enc(buf + 40, table->hdr->hdr_lba_start);
le64enc(buf + 48, table->hdr->hdr_lba_end);
le_uuid_enc(buf + 56, &table->hdr->hdr_uuid);
le32enc(buf + 80, table->hdr->hdr_entries);
le32enc(buf + 84, table->hdr->hdr_entsz);
LIST_FOREACH(baseentry, &basetable->gpt_entry, gpe_entry) {
if (baseentry->gpe_deleted)
continue;
entry = (struct g_part_gpt_entry *)baseentry;
index = baseentry->gpe_index - 1;
bp = buf + pp->sectorsize + table->hdr->hdr_entsz * index;
le_uuid_enc(bp, &entry->ent.ent_type);
le_uuid_enc(bp + 16, &entry->ent.ent_uuid);
le64enc(bp + 32, entry->ent.ent_lba_start);
le64enc(bp + 40, entry->ent.ent_lba_end);
le64enc(bp + 48, entry->ent.ent_attr);
memcpy(bp + 56, entry->ent.ent_name,
sizeof(entry->ent.ent_name));
}
crc = crc32(buf + pp->sectorsize,
table->hdr->hdr_entries * table->hdr->hdr_entsz);
le32enc(buf + 88, crc);
/* Write primary meta-data. */
le32enc(buf + 16, 0); /* hdr_crc_self. */
le64enc(buf + 24, table->lba[GPT_ELT_PRIHDR]); /* hdr_lba_self. */
le64enc(buf + 32, table->lba[GPT_ELT_SECHDR]); /* hdr_lba_alt. */
le64enc(buf + 72, table->lba[GPT_ELT_PRITBL]); /* hdr_lba_table. */
crc = crc32(buf, table->hdr->hdr_size);
le32enc(buf + 16, crc);
for (index = 0; index < tblsz; index += maxphys / pp->sectorsize) {
error = g_write_data(cp,
(table->lba[GPT_ELT_PRITBL] + index) * pp->sectorsize,
buf + (index + 1) * pp->sectorsize,
(tblsz - index > maxphys / pp->sectorsize) ? maxphys :
(tblsz - index) * pp->sectorsize);
if (error)
goto out;
}
error = g_write_data(cp, table->lba[GPT_ELT_PRIHDR] * pp->sectorsize,
buf, pp->sectorsize);
if (error)
goto out;
/* Write secondary meta-data. */
le32enc(buf + 16, 0); /* hdr_crc_self. */
le64enc(buf + 24, table->lba[GPT_ELT_SECHDR]); /* hdr_lba_self. */
le64enc(buf + 32, table->lba[GPT_ELT_PRIHDR]); /* hdr_lba_alt. */
le64enc(buf + 72, table->lba[GPT_ELT_SECTBL]); /* hdr_lba_table. */
crc = crc32(buf, table->hdr->hdr_size);
le32enc(buf + 16, crc);
for (index = 0; index < tblsz; index += maxphys / pp->sectorsize) {
error = g_write_data(cp,
(table->lba[GPT_ELT_SECTBL] + index) * pp->sectorsize,
buf + (index + 1) * pp->sectorsize,
(tblsz - index > maxphys / pp->sectorsize) ? maxphys :
(tblsz - index) * pp->sectorsize);
if (error)
goto out;
}
error = g_write_data(cp, table->lba[GPT_ELT_SECHDR] * pp->sectorsize,
buf, pp->sectorsize);
out:
g_free(buf);
return (error);
}
static void
g_gpt_set_defaults(struct g_part_table *basetable, struct g_provider *pp)
{
struct g_part_entry *baseentry;
struct g_part_gpt_entry *entry;
struct g_part_gpt_table *table;
quad_t start, end, min, max;
quad_t lba, last;
size_t spb, tblsz;
table = (struct g_part_gpt_table *)basetable;
last = pp->mediasize / pp->sectorsize - 1;
tblsz = howmany(basetable->gpt_entries * sizeof(struct gpt_ent),
pp->sectorsize);
table->lba[GPT_ELT_PRIHDR] = 1;
table->lba[GPT_ELT_PRITBL] = 2;
table->lba[GPT_ELT_SECHDR] = last;
table->lba[GPT_ELT_SECTBL] = last - tblsz;
table->state[GPT_ELT_PRIHDR] = GPT_STATE_OK;
table->state[GPT_ELT_PRITBL] = GPT_STATE_OK;
table->state[GPT_ELT_SECHDR] = GPT_STATE_OK;
table->state[GPT_ELT_SECTBL] = GPT_STATE_OK;
max = start = 2 + tblsz;
min = end = last - tblsz - 1;
LIST_FOREACH(baseentry, &basetable->gpt_entry, gpe_entry) {
if (baseentry->gpe_deleted)
continue;
entry = (struct g_part_gpt_entry *)baseentry;
if (entry->ent.ent_lba_start < min)
min = entry->ent.ent_lba_start;
if (entry->ent.ent_lba_end > max)
max = entry->ent.ent_lba_end;
}
spb = 4096 / pp->sectorsize;
if (spb > 1) {
lba = start + ((start % spb) ? spb - start % spb : 0);
if (lba <= min)
start = lba;
lba = end - (end + 1) % spb;
if (max <= lba)
end = lba;
}
table->hdr->hdr_lba_start = start;
table->hdr->hdr_lba_end = end;
basetable->gpt_first = start;
basetable->gpt_last = end;
}
static void
g_gpt_printf_utf16(struct sbuf *sb, uint16_t *str, size_t len)
{
u_int bo;
uint32_t ch;
uint16_t c;
bo = LITTLE_ENDIAN; /* GPT is little-endian */
while (len > 0 && *str != 0) {
ch = (bo == BIG_ENDIAN) ? be16toh(*str) : le16toh(*str);
str++, len--;
if ((ch & 0xf800) == 0xd800) {
if (len > 0) {
c = (bo == BIG_ENDIAN) ? be16toh(*str)
: le16toh(*str);
str++, len--;
} else
c = 0xfffd;
if ((ch & 0x400) == 0 && (c & 0xfc00) == 0xdc00) {
ch = ((ch & 0x3ff) << 10) + (c & 0x3ff);
ch += 0x10000;
} else
ch = 0xfffd;
} else if (ch == 0xfffe) { /* BOM (U+FEFF) swapped. */
bo = (bo == BIG_ENDIAN) ? LITTLE_ENDIAN : BIG_ENDIAN;
continue;
} else if (ch == 0xfeff) /* BOM (U+FEFF) unswapped. */
continue;
/* Write the Unicode character in UTF-8 */
if (ch < 0x80)
g_conf_printf_escaped(sb, "%c", ch);
else if (ch < 0x800)
g_conf_printf_escaped(sb, "%c%c", 0xc0 | (ch >> 6),
0x80 | (ch & 0x3f));
else if (ch < 0x10000)
g_conf_printf_escaped(sb, "%c%c%c", 0xe0 | (ch >> 12),
0x80 | ((ch >> 6) & 0x3f), 0x80 | (ch & 0x3f));
else if (ch < 0x200000)
g_conf_printf_escaped(sb, "%c%c%c%c", 0xf0 |
(ch >> 18), 0x80 | ((ch >> 12) & 0x3f),
0x80 | ((ch >> 6) & 0x3f), 0x80 | (ch & 0x3f));
}
}
static void
g_gpt_utf8_to_utf16(const uint8_t *s8, uint16_t *s16, size_t s16len)
{
size_t s16idx, s8idx;
uint32_t utfchar;
unsigned int c, utfbytes;
s8idx = s16idx = 0;
utfchar = 0;
utfbytes = 0;
bzero(s16, s16len << 1);
while (s8[s8idx] != 0 && s16idx < s16len) {
c = s8[s8idx++];
if ((c & 0xc0) != 0x80) {
/* Initial characters. */
if (utfbytes != 0) {
/* Incomplete encoding of previous char. */
s16[s16idx++] = htole16(0xfffd);
}
if ((c & 0xf8) == 0xf0) {
utfchar = c & 0x07;
utfbytes = 3;
} else if ((c & 0xf0) == 0xe0) {
utfchar = c & 0x0f;
utfbytes = 2;
} else if ((c & 0xe0) == 0xc0) {
utfchar = c & 0x1f;
utfbytes = 1;
} else {
utfchar = c & 0x7f;
utfbytes = 0;
}
} else {
/* Followup characters. */
if (utfbytes > 0) {
utfchar = (utfchar << 6) + (c & 0x3f);
utfbytes--;
} else if (utfbytes == 0)
utfbytes = ~0;
}
/*
* Write the complete Unicode character as UTF-16 when we
* have all the UTF-8 charactars collected.
*/
if (utfbytes == 0) {
/*
* If we need to write 2 UTF-16 characters, but
* we only have room for 1, then we truncate the
* string by writing a 0 instead.
*/
if (utfchar >= 0x10000 && s16idx < s16len - 1) {
s16[s16idx++] =
htole16(0xd800 | ((utfchar >> 10) - 0x40));
s16[s16idx++] =
htole16(0xdc00 | (utfchar & 0x3ff));
} else
s16[s16idx++] = (utfchar >= 0x10000) ? 0 :
htole16(utfchar);
}
}
/*
* If our input string was truncated, append an invalid encoding
* character to the output string.
*/
if (utfbytes != 0 && s16idx < s16len)
s16[s16idx++] = htole16(0xfffd);
}
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