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freebsd/sys/geom/part/g_part_gpt.c
Marcel Moolenaar 1d3aed33e8 Evolve the ctlreq interface added to geom_gpt into a generic
partitioning class that supports multiple schemes. Current
schemes supported are APM (Apple Partition Map) and GPT.
Change all GEOM_APPLE anf GEOM_GPT options into GEOM_PART_APM
and GEOM_PART_GPT (resp).

The ctlreq interface supports verbs to create and destroy
partitioning schemes on a disk; to add, delete and modify
partitions; and to commit or undo changes made.
2007-02-07 18:55:31 +00:00

737 lines
22 KiB
C

/*-
* Copyright (c) 2002, 2005, 2006, 2007 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/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/uuid.h>
#include <geom/geom.h>
#include <geom/part/g_part.h>
#include "g_part_if.h"
CTASSERT(offsetof(struct gpt_hdr, padding) == 92);
CTASSERT(sizeof(struct gpt_ent) == 128);
#define EQUUID(a,b) (memcmp(a, b, sizeof(struct uuid)) == 0)
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;
struct gpt_hdr hdr;
quad_t lba[GPT_ELT_COUNT];
enum gpt_state state[GPT_ELT_COUNT];
};
struct g_part_gpt_entry {
struct g_part_entry base;
struct gpt_ent ent;
};
static int g_part_gpt_add(struct g_part_table *, struct g_part_entry *,
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 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 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 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 kobj_method_t g_part_gpt_methods[] = {
KOBJMETHOD(g_part_add, g_part_gpt_add),
KOBJMETHOD(g_part_create, g_part_gpt_create),
KOBJMETHOD(g_part_destroy, g_part_gpt_destroy),
KOBJMETHOD(g_part_dumpto, g_part_gpt_dumpto),
KOBJMETHOD(g_part_modify, g_part_gpt_modify),
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_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 = INT_MAX,
};
G_PART_SCHEME_DECLARE(g_part_gpt_scheme);
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_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_linux_swap = GPT_ENT_TYPE_LINUX_SWAP;
static struct uuid gpt_uuid_mbr = GPT_ENT_TYPE_MBR;
static struct uuid gpt_uuid_unused = GPT_ENT_TYPE_UNUSED;
static void
gpt_read_hdr(struct g_part_gpt_table *table, struct g_consumer *cp,
enum gpt_elt elt, struct gpt_hdr *hdr)
{
struct uuid uuid;
struct g_provider *pp;
char *buf;
quad_t lba, last;
int error;
uint32_t crc, sz;
pp = cp->provider;
last = (pp->mediasize / pp->sectorsize) - 1;
table->lba[elt] = (elt == GPT_ELT_PRIHDR) ? 1 : last;
table->state[elt] = GPT_STATE_MISSING;
buf = g_read_data(cp, table->lba[elt] * pp->sectorsize, pp->sectorsize,
&error);
if (buf == NULL)
return;
bcopy(buf, hdr, sizeof(*hdr));
if (memcmp(hdr->hdr_sig, GPT_HDR_SIG, sizeof(hdr->hdr_sig)) != 0)
return;
table->state[elt] = GPT_STATE_CORRUPT;
sz = le32toh(hdr->hdr_size);
if (sz < 92 || sz > pp->sectorsize)
return;
crc = le32toh(hdr->hdr_crc_self);
hdr->hdr_crc_self = 0;
if (crc32(hdr, sz) != crc)
return;
hdr->hdr_size = sz;
hdr->hdr_crc_self = crc;
table->state[elt] = GPT_STATE_INVALID;
hdr->hdr_revision = le32toh(hdr->hdr_revision);
if (hdr->hdr_revision < 0x00010000)
return;
hdr->hdr_lba_self = le64toh(hdr->hdr_lba_self);
if (hdr->hdr_lba_self != table->lba[elt])
return;
hdr->hdr_lba_alt = le64toh(hdr->hdr_lba_alt);
/* Check the managed area. */
hdr->hdr_lba_start = le64toh(hdr->hdr_lba_start);
if (hdr->hdr_lba_start < 2 || hdr->hdr_lba_start >= last)
return;
hdr->hdr_lba_end = le64toh(hdr->hdr_lba_end);
if (hdr->hdr_lba_end < hdr->hdr_lba_start || hdr->hdr_lba_end >= last)
return;
/* Check the table location and size of the table. */
hdr->hdr_entries = le32toh(hdr->hdr_entries);
hdr->hdr_entsz = le32toh(hdr->hdr_entsz);
if (hdr->hdr_entries == 0 || hdr->hdr_entsz < 128 ||
(hdr->hdr_entsz & 7) != 0)
return;
hdr->hdr_lba_table = le64toh(hdr->hdr_lba_table);
if (hdr->hdr_lba_table < 2 || hdr->hdr_lba_table >= last)
return;
if (hdr->hdr_lba_table >= hdr->hdr_lba_start &&
hdr->hdr_lba_table <= hdr->hdr_lba_end)
return;
lba = hdr->hdr_lba_table +
(hdr->hdr_entries * hdr->hdr_entsz + pp->sectorsize - 1) /
pp->sectorsize - 1;
if (lba >= last)
return;
if (lba >= hdr->hdr_lba_start && lba <= hdr->hdr_lba_end)
return;
table->state[elt] = GPT_STATE_OK;
le_uuid_dec(&hdr->hdr_uuid, &uuid);
hdr->hdr_uuid = uuid;
hdr->hdr_crc_table = le32toh(hdr->hdr_crc_table);
}
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;
int error;
uint16_t ch;
pp = cp->provider;
table->lba[elt] = hdr->hdr_lba_table;
table->state[elt] = GPT_STATE_MISSING;
tblsz = hdr->hdr_entries * hdr->hdr_entsz;
sectors = (tblsz + pp->sectorsize - 1) / pp->sectorsize;
buf = g_read_data(cp, table->lba[elt] * pp->sectorsize,
sectors * pp->sectorsize, &error);
if (buf == NULL)
return (NULL);
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);
for (ch = 0; ch < sizeof(ent->ent_name)/2; ch++)
ent->ent_name[ch] = le16dec(p + 56 + ch * 2);
}
g_free(buf);
return (tbl);
}
static int
gpt_matched_hdrs(struct gpt_hdr *pri, struct gpt_hdr *sec)
{
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;
int error;
if (type[0] != '@') {
error = parse_uuid(type, &tmp);
if (error)
return (error);
if (EQUUID(&tmp, &gpt_uuid_unused))
return (EINVAL);
*uuid = tmp;
return (0);
}
if (!strcmp(type, g_part_alias_name(G_PART_ALIAS_EFI)))
*uuid = gpt_uuid_efi;
else if (!strcmp(type, g_part_alias_name(G_PART_ALIAS_FREEBSD)))
*uuid = gpt_uuid_freebsd;
else if (!strcmp(type, g_part_alias_name(G_PART_ALIAS_FREEBSD_SWAP)))
*uuid = gpt_uuid_freebsd_swap;
else if (!strcmp(type, g_part_alias_name(G_PART_ALIAS_FREEBSD_UFS)))
*uuid = gpt_uuid_freebsd_ufs;
else if (!strcmp(type, g_part_alias_name(G_PART_ALIAS_FREEBSD_VINUM)))
*uuid = gpt_uuid_freebsd_vinum;
else if (!strcmp(type, g_part_alias_name(G_PART_ALIAS_MBR)))
*uuid = gpt_uuid_mbr;
else
return (EINVAL);
return (0);
}
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));
}
/* XXX label */
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;
quad_t last;
size_t tblsz;
table = (struct g_part_gpt_table *)basetable;
pp = gpp->gpp_provider;
tblsz = (basetable->gpt_entries * sizeof(struct gpt_ent) +
pp->sectorsize - 1) / pp->sectorsize;
if (pp->sectorsize < 512 ||
pp->mediasize < (3 + 2 * tblsz + basetable->gpt_entries) *
pp->sectorsize)
return (ENOSPC);
last = (pp->mediasize / pp->sectorsize) - 1;
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;
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);
table->hdr.hdr_lba_start = 2 + tblsz;
table->hdr.hdr_lba_end = last - tblsz - 1;
kern_uuidgen(&table->hdr.hdr_uuid, 1);
table->hdr.hdr_entries = basetable->gpt_entries;
table->hdr.hdr_entsz = sizeof(struct gpt_ent);
basetable->gpt_first = table->hdr.hdr_lba_start;
basetable->gpt_last = table->hdr.hdr_lba_end;
return (0);
}
static int
g_part_gpt_destroy(struct g_part_table *basetable, struct g_part_parms *gpp)
{
/*
* Wipe the first 2 sectors as well as the last to clear the
* partitioning.
*/
basetable->gpt_smhead |= 3;
basetable->gpt_smtail |= 1;
return (0);
}
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)) ? 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;
error = gpt_parse_type(gpp->gpp_type, &entry->ent.ent_type);
if (error)
return (error);
/* XXX label */
return (0);
}
static 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;
char *buf;
int error, res;
/* We don't nest, which means that our depth should be 0. */
if (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 < 512 || pp->mediasize < 6 * pp->sectorsize)
return (ENOSPC);
/* Check that there's a MBR. */
buf = g_read_data(cp, 0L, pp->sectorsize, &error);
if (buf == NULL)
return (error);
res = le16dec(buf + DOSMAGICOFFSET);
g_free(buf);
if (res != DOSMAGIC)
return (ENXIO);
/* 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 (G_PART_PROBE_PRI_HIGH);
/* 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) ? G_PART_PROBE_PRI_HIGH : 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;
int index;
table = (struct g_part_gpt_table *)basetable;
pp = cp->provider;
/* Read the primary header and table. */
gpt_read_hdr(table, cp, GPT_ELT_PRIHDR, &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. */
gpt_read_hdr(table, cp, GPT_ELT_SECHDR, &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);
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;
else
table->state[GPT_ELT_PRIHDR] = GPT_STATE_INVALID;
}
if (table->state[GPT_ELT_PRIHDR] != 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;
tbl = sectbl;
if (pritbl != NULL)
g_free(pritbl);
} else {
if (table->state[GPT_ELT_SECHDR] != 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);
}
table->hdr = prihdr;
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);
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;
entry = (struct g_part_gpt_entry *)baseentry;
type = &entry->ent.ent_type;
if (EQUUID(type, &gpt_uuid_efi))
return (g_part_alias_name(G_PART_ALIAS_EFI));
if (EQUUID(type, &gpt_uuid_freebsd))
return (g_part_alias_name(G_PART_ALIAS_FREEBSD));
if (EQUUID(type, &gpt_uuid_freebsd_swap))
return (g_part_alias_name(G_PART_ALIAS_FREEBSD_SWAP));
if (EQUUID(type, &gpt_uuid_freebsd_ufs))
return (g_part_alias_name(G_PART_ALIAS_FREEBSD_UFS));
if (EQUUID(type, &gpt_uuid_freebsd_vinum))
return (g_part_alias_name(G_PART_ALIAS_FREEBSD_VINUM));
if (EQUUID(type, &gpt_uuid_mbr))
return (g_part_alias_name(G_PART_ALIAS_MBR));
snprintf_uuid(buf, bufsz, 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 tlbsz;
uint32_t crc;
int error, index;
pp = cp->provider;
table = (struct g_part_gpt_table *)basetable;
tlbsz = (table->hdr.hdr_entries * table->hdr.hdr_entsz +
pp->sectorsize - 1) / pp->sectorsize;
if (basetable->gpt_created) {
buf = g_malloc(pp->sectorsize, M_WAITOK | M_ZERO);
le16enc(buf + DOSMAGICOFFSET, DOSMAGIC);
buf[DOSPARTOFF + 1] = 0xff; /* shd */
buf[DOSPARTOFF + 2] = 0xff; /* ssect */
buf[DOSPARTOFF + 3] = 0xff; /* scyl */
buf[DOSPARTOFF + 4] = 0xee; /* typ */
buf[DOSPARTOFF + 5] = 0xff; /* ehd */
buf[DOSPARTOFF + 6] = 0xff; /* esect */
buf[DOSPARTOFF + 7] = 0xff; /* ecyl */
le32enc(buf + DOSPARTOFF + 8, 1); /* start */
le32enc(buf + DOSPARTOFF + 12,
MIN(pp->mediasize / pp->sectorsize - 1, 0xffffffffLL));
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((tlbsz + 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) {
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);
error = g_write_data(cp, table->lba[GPT_ELT_PRITBL] * pp->sectorsize,
buf + pp->sectorsize, tlbsz * 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);
error = g_write_data(cp, table->lba[GPT_ELT_SECTBL] * pp->sectorsize,
buf + pp->sectorsize, tlbsz * 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);
}
#if 0
static void
g_gpt_to_utf8(struct sbuf *sb, uint16_t *str, size_t len)
{
u_int bo;
uint32_t ch;
uint16_t c;
bo = BYTE_ORDER;
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;
if (ch < 0x80)
sbuf_printf(sb, "%c", ch);
else if (ch < 0x800)
sbuf_printf(sb, "%c%c", 0xc0 | (ch >> 6),
0x80 | (ch & 0x3f));
else if (ch < 0x10000)
sbuf_printf(sb, "%c%c%c", 0xe0 | (ch >> 12),
0x80 | ((ch >> 6) & 0x3f), 0x80 | (ch & 0x3f));
else if (ch < 0x200000)
sbuf_printf(sb, "%c%c%c%c", 0xf0 | (ch >> 18),
0x80 | ((ch >> 12) & 0x3f),
0x80 | ((ch >> 6) & 0x3f), 0x80 | (ch & 0x3f));
}
}
#endif