| Current Path : /compat/linux/proc/68247/root/compat/linux/proc/68247/root/sys/geom/part/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
| Current File : //compat/linux/proc/68247/root/compat/linux/proc/68247/root/sys/geom/part/g_part_apm.c |
/*-
* Copyright (c) 2006-2008 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: release/9.1.0/sys/geom/part/g_part_apm.c 231640 2012-02-14 07:12:46Z ae $");
#include <sys/param.h>
#include <sys/apm.h>
#include <sys/bio.h>
#include <sys/diskmbr.h>
#include <sys/endian.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 <geom/geom.h>
#include <geom/part/g_part.h>
#include "g_part_if.h"
FEATURE(geom_part_apm, "GEOM partitioning class for Apple-style partitions");
struct g_part_apm_table {
struct g_part_table base;
struct apm_ddr ddr;
struct apm_ent self;
int tivo_series1;
};
struct g_part_apm_entry {
struct g_part_entry base;
struct apm_ent ent;
};
static int g_part_apm_add(struct g_part_table *, struct g_part_entry *,
struct g_part_parms *);
static int g_part_apm_create(struct g_part_table *, struct g_part_parms *);
static int g_part_apm_destroy(struct g_part_table *, struct g_part_parms *);
static void g_part_apm_dumpconf(struct g_part_table *, struct g_part_entry *,
struct sbuf *, const char *);
static int g_part_apm_dumpto(struct g_part_table *, struct g_part_entry *);
static int g_part_apm_modify(struct g_part_table *, struct g_part_entry *,
struct g_part_parms *);
static const char *g_part_apm_name(struct g_part_table *, struct g_part_entry *,
char *, size_t);
static int g_part_apm_probe(struct g_part_table *, struct g_consumer *);
static int g_part_apm_read(struct g_part_table *, struct g_consumer *);
static const char *g_part_apm_type(struct g_part_table *, struct g_part_entry *,
char *, size_t);
static int g_part_apm_write(struct g_part_table *, struct g_consumer *);
static int g_part_apm_resize(struct g_part_table *, struct g_part_entry *,
struct g_part_parms *);
static kobj_method_t g_part_apm_methods[] = {
KOBJMETHOD(g_part_add, g_part_apm_add),
KOBJMETHOD(g_part_create, g_part_apm_create),
KOBJMETHOD(g_part_destroy, g_part_apm_destroy),
KOBJMETHOD(g_part_dumpconf, g_part_apm_dumpconf),
KOBJMETHOD(g_part_dumpto, g_part_apm_dumpto),
KOBJMETHOD(g_part_modify, g_part_apm_modify),
KOBJMETHOD(g_part_resize, g_part_apm_resize),
KOBJMETHOD(g_part_name, g_part_apm_name),
KOBJMETHOD(g_part_probe, g_part_apm_probe),
KOBJMETHOD(g_part_read, g_part_apm_read),
KOBJMETHOD(g_part_type, g_part_apm_type),
KOBJMETHOD(g_part_write, g_part_apm_write),
{ 0, 0 }
};
static struct g_part_scheme g_part_apm_scheme = {
"APM",
g_part_apm_methods,
sizeof(struct g_part_apm_table),
.gps_entrysz = sizeof(struct g_part_apm_entry),
.gps_minent = 16,
.gps_maxent = 4096,
};
G_PART_SCHEME_DECLARE(g_part_apm);
static void
swab(char *buf, size_t bufsz)
{
int i;
char ch;
for (i = 0; i < bufsz; i += 2) {
ch = buf[i];
buf[i] = buf[i + 1];
buf[i + 1] = ch;
}
}
static int
apm_parse_type(const char *type, char *buf, size_t bufsz)
{
const char *alias;
if (type[0] == '!') {
type++;
if (strlen(type) > bufsz)
return (EINVAL);
if (!strcmp(type, APM_ENT_TYPE_SELF) ||
!strcmp(type, APM_ENT_TYPE_UNUSED))
return (EINVAL);
strncpy(buf, type, bufsz);
return (0);
}
alias = g_part_alias_name(G_PART_ALIAS_APPLE_BOOT);
if (!strcasecmp(type, alias)) {
strcpy(buf, APM_ENT_TYPE_APPLE_BOOT);
return (0);
}
alias = g_part_alias_name(G_PART_ALIAS_APPLE_HFS);
if (!strcasecmp(type, alias)) {
strcpy(buf, APM_ENT_TYPE_APPLE_HFS);
return (0);
}
alias = g_part_alias_name(G_PART_ALIAS_APPLE_UFS);
if (!strcasecmp(type, alias)) {
strcpy(buf, APM_ENT_TYPE_APPLE_UFS);
return (0);
}
alias = g_part_alias_name(G_PART_ALIAS_FREEBSD_BOOT);
if (!strcasecmp(type, alias)) {
strcpy(buf, APM_ENT_TYPE_APPLE_BOOT);
return (0);
}
alias = g_part_alias_name(G_PART_ALIAS_FREEBSD);
if (!strcasecmp(type, alias)) {
strcpy(buf, APM_ENT_TYPE_FREEBSD);
return (0);
}
alias = g_part_alias_name(G_PART_ALIAS_FREEBSD_SWAP);
if (!strcasecmp(type, alias)) {
strcpy(buf, APM_ENT_TYPE_FREEBSD_SWAP);
return (0);
}
alias = g_part_alias_name(G_PART_ALIAS_FREEBSD_UFS);
if (!strcasecmp(type, alias)) {
strcpy(buf, APM_ENT_TYPE_FREEBSD_UFS);
return (0);
}
alias = g_part_alias_name(G_PART_ALIAS_FREEBSD_VINUM);
if (!strcasecmp(type, alias)) {
strcpy(buf, APM_ENT_TYPE_FREEBSD_VINUM);
return (0);
}
alias = g_part_alias_name(G_PART_ALIAS_FREEBSD_ZFS);
if (!strcasecmp(type, alias)) {
strcpy(buf, APM_ENT_TYPE_FREEBSD_ZFS);
return (0);
}
return (EINVAL);
}
static int
apm_read_ent(struct g_consumer *cp, uint32_t blk, struct apm_ent *ent,
int tivo_series1)
{
struct g_provider *pp;
char *buf;
int error;
pp = cp->provider;
buf = g_read_data(cp, pp->sectorsize * blk, pp->sectorsize, &error);
if (buf == NULL)
return (error);
if (tivo_series1)
swab(buf, pp->sectorsize);
ent->ent_sig = be16dec(buf);
ent->ent_pmblkcnt = be32dec(buf + 4);
ent->ent_start = be32dec(buf + 8);
ent->ent_size = be32dec(buf + 12);
bcopy(buf + 16, ent->ent_name, sizeof(ent->ent_name));
bcopy(buf + 48, ent->ent_type, sizeof(ent->ent_type));
g_free(buf);
return (0);
}
static int
g_part_apm_add(struct g_part_table *basetable, struct g_part_entry *baseentry,
struct g_part_parms *gpp)
{
struct g_part_apm_entry *entry;
struct g_part_apm_table *table;
int error;
entry = (struct g_part_apm_entry *)baseentry;
table = (struct g_part_apm_table *)basetable;
entry->ent.ent_sig = APM_ENT_SIG;
entry->ent.ent_pmblkcnt = table->self.ent_pmblkcnt;
entry->ent.ent_start = gpp->gpp_start;
entry->ent.ent_size = gpp->gpp_size;
if (baseentry->gpe_deleted) {
bzero(entry->ent.ent_type, sizeof(entry->ent.ent_type));
bzero(entry->ent.ent_name, sizeof(entry->ent.ent_name));
}
error = apm_parse_type(gpp->gpp_type, entry->ent.ent_type,
sizeof(entry->ent.ent_type));
if (error)
return (error);
if (gpp->gpp_parms & G_PART_PARM_LABEL) {
if (strlen(gpp->gpp_label) > sizeof(entry->ent.ent_name))
return (EINVAL);
strncpy(entry->ent.ent_name, gpp->gpp_label,
sizeof(entry->ent.ent_name));
}
if (baseentry->gpe_index >= table->self.ent_pmblkcnt)
table->self.ent_pmblkcnt = baseentry->gpe_index + 1;
KASSERT(table->self.ent_size >= table->self.ent_pmblkcnt,
("%s", __func__));
KASSERT(table->self.ent_size > baseentry->gpe_index,
("%s", __func__));
return (0);
}
static int
g_part_apm_create(struct g_part_table *basetable, struct g_part_parms *gpp)
{
struct g_provider *pp;
struct g_part_apm_table *table;
uint32_t last;
/* We don't nest, which means that our depth should be 0. */
if (basetable->gpt_depth != 0)
return (ENXIO);
table = (struct g_part_apm_table *)basetable;
pp = gpp->gpp_provider;
if (pp->sectorsize != 512 ||
pp->mediasize < (2 + 2 * basetable->gpt_entries) * pp->sectorsize)
return (ENOSPC);
/* APM uses 32-bit LBAs. */
last = MIN(pp->mediasize / pp->sectorsize, UINT32_MAX) - 1;
basetable->gpt_first = 2 + basetable->gpt_entries;
basetable->gpt_last = last;
table->ddr.ddr_sig = APM_DDR_SIG;
table->ddr.ddr_blksize = pp->sectorsize;
table->ddr.ddr_blkcount = last + 1;
table->self.ent_sig = APM_ENT_SIG;
table->self.ent_pmblkcnt = basetable->gpt_entries + 1;
table->self.ent_start = 1;
table->self.ent_size = table->self.ent_pmblkcnt;
strcpy(table->self.ent_name, "Apple");
strcpy(table->self.ent_type, APM_ENT_TYPE_SELF);
return (0);
}
static int
g_part_apm_destroy(struct g_part_table *basetable, struct g_part_parms *gpp)
{
/* Wipe the first 2 sectors to clear the partitioning. */
basetable->gpt_smhead |= 3;
return (0);
}
static void
g_part_apm_dumpconf(struct g_part_table *table, struct g_part_entry *baseentry,
struct sbuf *sb, const char *indent)
{
union {
char name[APM_ENT_NAMELEN + 1];
char type[APM_ENT_TYPELEN + 1];
} u;
struct g_part_apm_entry *entry;
entry = (struct g_part_apm_entry *)baseentry;
if (indent == NULL) {
/* conftxt: libdisk compatibility */
sbuf_printf(sb, " xs APPLE xt %s", entry->ent.ent_type);
} else if (entry != NULL) {
/* confxml: partition entry information */
strncpy(u.name, entry->ent.ent_name, APM_ENT_NAMELEN);
u.name[APM_ENT_NAMELEN] = '\0';
sbuf_printf(sb, "%s<label>%s</label>\n", indent, u.name);
strncpy(u.type, entry->ent.ent_type, APM_ENT_TYPELEN);
u.type[APM_ENT_TYPELEN] = '\0';
sbuf_printf(sb, "%s<rawtype>%s</rawtype>\n", indent, u.type);
} else {
/* confxml: scheme information */
}
}
static int
g_part_apm_dumpto(struct g_part_table *table, struct g_part_entry *baseentry)
{
struct g_part_apm_entry *entry;
entry = (struct g_part_apm_entry *)baseentry;
return ((!strcmp(entry->ent.ent_type, APM_ENT_TYPE_FREEBSD_SWAP))
? 1 : 0);
}
static int
g_part_apm_modify(struct g_part_table *basetable,
struct g_part_entry *baseentry, struct g_part_parms *gpp)
{
struct g_part_apm_entry *entry;
int error;
entry = (struct g_part_apm_entry *)baseentry;
if (gpp->gpp_parms & G_PART_PARM_LABEL) {
if (strlen(gpp->gpp_label) > sizeof(entry->ent.ent_name))
return (EINVAL);
}
if (gpp->gpp_parms & G_PART_PARM_TYPE) {
error = apm_parse_type(gpp->gpp_type, entry->ent.ent_type,
sizeof(entry->ent.ent_type));
if (error)
return (error);
}
if (gpp->gpp_parms & G_PART_PARM_LABEL) {
strncpy(entry->ent.ent_name, gpp->gpp_label,
sizeof(entry->ent.ent_name));
}
return (0);
}
static int
g_part_apm_resize(struct g_part_table *basetable,
struct g_part_entry *baseentry, struct g_part_parms *gpp)
{
struct g_part_apm_entry *entry;
entry = (struct g_part_apm_entry *)baseentry;
baseentry->gpe_end = baseentry->gpe_start + gpp->gpp_size - 1;
entry->ent.ent_size = gpp->gpp_size;
return (0);
}
static const char *
g_part_apm_name(struct g_part_table *table, struct g_part_entry *baseentry,
char *buf, size_t bufsz)
{
snprintf(buf, bufsz, "s%d", baseentry->gpe_index + 1);
return (buf);
}
static int
g_part_apm_probe(struct g_part_table *basetable, struct g_consumer *cp)
{
struct g_provider *pp;
struct g_part_apm_table *table;
char *buf;
int error;
/* We don't nest, which means that our depth should be 0. */
if (basetable->gpt_depth != 0)
return (ENXIO);
table = (struct g_part_apm_table *)basetable;
table->tivo_series1 = 0;
pp = cp->provider;
/* Sanity-check the provider. */
if (pp->mediasize < 4 * pp->sectorsize)
return (ENOSPC);
/* Check that there's a Driver Descriptor Record (DDR). */
buf = g_read_data(cp, 0L, pp->sectorsize, &error);
if (buf == NULL)
return (error);
if (be16dec(buf) == APM_DDR_SIG) {
/* Normal Apple DDR */
table->ddr.ddr_sig = be16dec(buf);
table->ddr.ddr_blksize = be16dec(buf + 2);
table->ddr.ddr_blkcount = be32dec(buf + 4);
g_free(buf);
if (table->ddr.ddr_blksize != pp->sectorsize)
return (ENXIO);
if (table->ddr.ddr_blkcount > pp->mediasize / pp->sectorsize)
return (ENXIO);
} else {
/*
* Check for Tivo drives, which have no DDR and a different
* signature. Those whose first two bytes are 14 92 are
* Series 2 drives, and aren't supported. Those that start
* with 92 14 are series 1 drives and are supported.
*/
if (be16dec(buf) != 0x9214) {
/* If this is 0x1492 it could be a series 2 drive */
g_free(buf);
return (ENXIO);
}
table->ddr.ddr_sig = APM_DDR_SIG; /* XXX */
table->ddr.ddr_blksize = pp->sectorsize; /* XXX */
table->ddr.ddr_blkcount =
MIN(pp->mediasize / pp->sectorsize, UINT32_MAX);
table->tivo_series1 = 1;
g_free(buf);
}
/* Check that there's a Partition Map. */
error = apm_read_ent(cp, 1, &table->self, table->tivo_series1);
if (error)
return (error);
if (table->self.ent_sig != APM_ENT_SIG)
return (ENXIO);
if (strcmp(table->self.ent_type, APM_ENT_TYPE_SELF))
return (ENXIO);
if (table->self.ent_pmblkcnt >= table->ddr.ddr_blkcount)
return (ENXIO);
return (G_PART_PROBE_PRI_NORM);
}
static int
g_part_apm_read(struct g_part_table *basetable, struct g_consumer *cp)
{
struct apm_ent ent;
struct g_part_apm_entry *entry;
struct g_part_apm_table *table;
int error, index;
table = (struct g_part_apm_table *)basetable;
basetable->gpt_first = table->self.ent_size + 1;
basetable->gpt_last = table->ddr.ddr_blkcount - 1;
basetable->gpt_entries = table->self.ent_size - 1;
for (index = table->self.ent_pmblkcnt - 1; index > 0; index--) {
error = apm_read_ent(cp, index + 1, &ent, table->tivo_series1);
if (error)
continue;
if (!strcmp(ent.ent_type, APM_ENT_TYPE_UNUSED))
continue;
entry = (struct g_part_apm_entry *)g_part_new_entry(basetable,
index, ent.ent_start, ent.ent_start + ent.ent_size - 1);
entry->ent = ent;
}
return (0);
}
static const char *
g_part_apm_type(struct g_part_table *basetable, struct g_part_entry *baseentry,
char *buf, size_t bufsz)
{
struct g_part_apm_entry *entry;
const char *type;
size_t len;
entry = (struct g_part_apm_entry *)baseentry;
type = entry->ent.ent_type;
if (!strcmp(type, APM_ENT_TYPE_APPLE_BOOT))
return (g_part_alias_name(G_PART_ALIAS_APPLE_BOOT));
if (!strcmp(type, APM_ENT_TYPE_APPLE_HFS))
return (g_part_alias_name(G_PART_ALIAS_APPLE_HFS));
if (!strcmp(type, APM_ENT_TYPE_APPLE_UFS))
return (g_part_alias_name(G_PART_ALIAS_APPLE_UFS));
if (!strcmp(type, APM_ENT_TYPE_FREEBSD))
return (g_part_alias_name(G_PART_ALIAS_FREEBSD));
if (!strcmp(type, APM_ENT_TYPE_FREEBSD_SWAP))
return (g_part_alias_name(G_PART_ALIAS_FREEBSD_SWAP));
if (!strcmp(type, APM_ENT_TYPE_FREEBSD_UFS))
return (g_part_alias_name(G_PART_ALIAS_FREEBSD_UFS));
if (!strcmp(type, APM_ENT_TYPE_FREEBSD_VINUM))
return (g_part_alias_name(G_PART_ALIAS_FREEBSD_VINUM));
if (!strcmp(type, APM_ENT_TYPE_FREEBSD_ZFS))
return (g_part_alias_name(G_PART_ALIAS_FREEBSD_ZFS));
buf[0] = '!';
len = MIN(sizeof(entry->ent.ent_type), bufsz - 2);
bcopy(type, buf + 1, len);
buf[len + 1] = '\0';
return (buf);
}
static int
g_part_apm_write(struct g_part_table *basetable, struct g_consumer *cp)
{
struct g_provider *pp;
struct g_part_entry *baseentry;
struct g_part_apm_entry *entry;
struct g_part_apm_table *table;
char *buf, *ptr;
uint32_t index;
int error;
size_t tblsz;
pp = cp->provider;
table = (struct g_part_apm_table *)basetable;
/*
* Tivo Series 1 disk partitions are currently read-only.
*/
if (table->tivo_series1)
return (EOPNOTSUPP);
/* Write the DDR only when we're newly created. */
if (basetable->gpt_created) {
buf = g_malloc(pp->sectorsize, M_WAITOK | M_ZERO);
be16enc(buf, table->ddr.ddr_sig);
be16enc(buf + 2, table->ddr.ddr_blksize);
be32enc(buf + 4, table->ddr.ddr_blkcount);
error = g_write_data(cp, 0, buf, pp->sectorsize);
g_free(buf);
if (error)
return (error);
}
/* Allocate the buffer for all entries */
tblsz = table->self.ent_pmblkcnt;
buf = g_malloc(tblsz * pp->sectorsize, M_WAITOK | M_ZERO);
/* Fill the self entry */
be16enc(buf, APM_ENT_SIG);
be32enc(buf + 4, table->self.ent_pmblkcnt);
be32enc(buf + 8, table->self.ent_start);
be32enc(buf + 12, table->self.ent_size);
bcopy(table->self.ent_name, buf + 16, sizeof(table->self.ent_name));
bcopy(table->self.ent_type, buf + 48, sizeof(table->self.ent_type));
baseentry = LIST_FIRST(&basetable->gpt_entry);
for (index = 1; index < tblsz; index++) {
entry = (baseentry != NULL && index == baseentry->gpe_index)
? (struct g_part_apm_entry *)baseentry : NULL;
ptr = buf + index * pp->sectorsize;
be16enc(ptr, APM_ENT_SIG);
be32enc(ptr + 4, table->self.ent_pmblkcnt);
if (entry != NULL && !baseentry->gpe_deleted) {
be32enc(ptr + 8, entry->ent.ent_start);
be32enc(ptr + 12, entry->ent.ent_size);
bcopy(entry->ent.ent_name, ptr + 16,
sizeof(entry->ent.ent_name));
bcopy(entry->ent.ent_type, ptr + 48,
sizeof(entry->ent.ent_type));
} else {
strcpy(ptr + 48, APM_ENT_TYPE_UNUSED);
}
if (entry != NULL)
baseentry = LIST_NEXT(baseentry, gpe_entry);
}
for (index = 0; index < tblsz; index += MAXPHYS / pp->sectorsize) {
error = g_write_data(cp, (1 + index) * pp->sectorsize,
buf + index * pp->sectorsize,
(tblsz - index > MAXPHYS / pp->sectorsize) ? MAXPHYS:
(tblsz - index) * pp->sectorsize);
if (error) {
g_free(buf);
return (error);
}
}
g_free(buf);
return (0);
}