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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 : //sys/amd64/compile/hs32/modules/usr/src/sys/modules/fxp/@/geom/part/g_part_bsd.c |
/*-
* Copyright (c) 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: release/9.1.0/sys/geom/part/g_part_bsd.c 223332 2011-06-20 12:22:30Z ae $");
#include <sys/param.h>
#include <sys/bio.h>
#include <sys/disklabel.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"
#define BOOT1_SIZE 512
#define LABEL_SIZE 512
#define BOOT2_OFF (BOOT1_SIZE + LABEL_SIZE)
#define BOOT2_SIZE (BBSIZE - BOOT2_OFF)
FEATURE(geom_part_bsd, "GEOM partitioning class for BSD disklabels");
struct g_part_bsd_table {
struct g_part_table base;
u_char *bbarea;
uint32_t offset;
};
struct g_part_bsd_entry {
struct g_part_entry base;
struct partition part;
};
static int g_part_bsd_add(struct g_part_table *, struct g_part_entry *,
struct g_part_parms *);
static int g_part_bsd_bootcode(struct g_part_table *, struct g_part_parms *);
static int g_part_bsd_create(struct g_part_table *, struct g_part_parms *);
static int g_part_bsd_destroy(struct g_part_table *, struct g_part_parms *);
static void g_part_bsd_dumpconf(struct g_part_table *, struct g_part_entry *,
struct sbuf *, const char *);
static int g_part_bsd_dumpto(struct g_part_table *, struct g_part_entry *);
static int g_part_bsd_modify(struct g_part_table *, struct g_part_entry *,
struct g_part_parms *);
static const char *g_part_bsd_name(struct g_part_table *, struct g_part_entry *,
char *, size_t);
static int g_part_bsd_probe(struct g_part_table *, struct g_consumer *);
static int g_part_bsd_read(struct g_part_table *, struct g_consumer *);
static const char *g_part_bsd_type(struct g_part_table *, struct g_part_entry *,
char *, size_t);
static int g_part_bsd_write(struct g_part_table *, struct g_consumer *);
static int g_part_bsd_resize(struct g_part_table *, struct g_part_entry *,
struct g_part_parms *);
static kobj_method_t g_part_bsd_methods[] = {
KOBJMETHOD(g_part_add, g_part_bsd_add),
KOBJMETHOD(g_part_bootcode, g_part_bsd_bootcode),
KOBJMETHOD(g_part_create, g_part_bsd_create),
KOBJMETHOD(g_part_destroy, g_part_bsd_destroy),
KOBJMETHOD(g_part_dumpconf, g_part_bsd_dumpconf),
KOBJMETHOD(g_part_dumpto, g_part_bsd_dumpto),
KOBJMETHOD(g_part_modify, g_part_bsd_modify),
KOBJMETHOD(g_part_resize, g_part_bsd_resize),
KOBJMETHOD(g_part_name, g_part_bsd_name),
KOBJMETHOD(g_part_probe, g_part_bsd_probe),
KOBJMETHOD(g_part_read, g_part_bsd_read),
KOBJMETHOD(g_part_type, g_part_bsd_type),
KOBJMETHOD(g_part_write, g_part_bsd_write),
{ 0, 0 }
};
static struct g_part_scheme g_part_bsd_scheme = {
"BSD",
g_part_bsd_methods,
sizeof(struct g_part_bsd_table),
.gps_entrysz = sizeof(struct g_part_bsd_entry),
.gps_minent = 8,
.gps_maxent = 20, /* Only 22 entries fit in 512 byte sectors */
.gps_bootcodesz = BBSIZE,
};
G_PART_SCHEME_DECLARE(g_part_bsd);
static int
bsd_parse_type(const char *type, uint8_t *fstype)
{
const char *alias;
char *endp;
long lt;
if (type[0] == '!') {
lt = strtol(type + 1, &endp, 0);
if (type[1] == '\0' || *endp != '\0' || lt <= 0 || lt >= 256)
return (EINVAL);
*fstype = (u_int)lt;
return (0);
}
alias = g_part_alias_name(G_PART_ALIAS_FREEBSD_SWAP);
if (!strcasecmp(type, alias)) {
*fstype = FS_SWAP;
return (0);
}
alias = g_part_alias_name(G_PART_ALIAS_FREEBSD_UFS);
if (!strcasecmp(type, alias)) {
*fstype = FS_BSDFFS;
return (0);
}
alias = g_part_alias_name(G_PART_ALIAS_FREEBSD_VINUM);
if (!strcasecmp(type, alias)) {
*fstype = FS_VINUM;
return (0);
}
alias = g_part_alias_name(G_PART_ALIAS_FREEBSD_ZFS);
if (!strcasecmp(type, alias)) {
*fstype = FS_ZFS;
return (0);
}
return (EINVAL);
}
static int
g_part_bsd_add(struct g_part_table *basetable, struct g_part_entry *baseentry,
struct g_part_parms *gpp)
{
struct g_part_bsd_entry *entry;
struct g_part_bsd_table *table;
if (gpp->gpp_parms & G_PART_PARM_LABEL)
return (EINVAL);
entry = (struct g_part_bsd_entry *)baseentry;
table = (struct g_part_bsd_table *)basetable;
entry->part.p_size = gpp->gpp_size;
entry->part.p_offset = gpp->gpp_start + table->offset;
entry->part.p_fsize = 0;
entry->part.p_frag = 0;
entry->part.p_cpg = 0;
return (bsd_parse_type(gpp->gpp_type, &entry->part.p_fstype));
}
static int
g_part_bsd_bootcode(struct g_part_table *basetable, struct g_part_parms *gpp)
{
struct g_part_bsd_table *table;
const u_char *codeptr;
if (gpp->gpp_codesize != BOOT1_SIZE && gpp->gpp_codesize != BBSIZE)
return (ENODEV);
table = (struct g_part_bsd_table *)basetable;
codeptr = gpp->gpp_codeptr;
bcopy(codeptr, table->bbarea, BOOT1_SIZE);
if (gpp->gpp_codesize == BBSIZE)
bcopy(codeptr + BOOT2_OFF, table->bbarea + BOOT2_OFF,
BOOT2_SIZE);
return (0);
}
static int
g_part_bsd_create(struct g_part_table *basetable, struct g_part_parms *gpp)
{
struct g_provider *pp;
struct g_part_entry *baseentry;
struct g_part_bsd_entry *entry;
struct g_part_bsd_table *table;
u_char *ptr;
uint32_t msize, ncyls, secpercyl;
pp = gpp->gpp_provider;
if (pp->sectorsize < sizeof(struct disklabel))
return (ENOSPC);
if (BBSIZE % pp->sectorsize)
return (ENOTBLK);
msize = MIN(pp->mediasize / pp->sectorsize, UINT32_MAX);
secpercyl = basetable->gpt_sectors * basetable->gpt_heads;
ncyls = msize / secpercyl;
table = (struct g_part_bsd_table *)basetable;
table->bbarea = g_malloc(BBSIZE, M_WAITOK | M_ZERO);
ptr = table->bbarea + pp->sectorsize;
le32enc(ptr + 0, DISKMAGIC); /* d_magic */
le32enc(ptr + 40, pp->sectorsize); /* d_secsize */
le32enc(ptr + 44, basetable->gpt_sectors); /* d_nsectors */
le32enc(ptr + 48, basetable->gpt_heads); /* d_ntracks */
le32enc(ptr + 52, ncyls); /* d_ncylinders */
le32enc(ptr + 56, secpercyl); /* d_secpercyl */
le32enc(ptr + 60, msize); /* d_secperunit */
le16enc(ptr + 72, 3600); /* d_rpm */
le32enc(ptr + 132, DISKMAGIC); /* d_magic2 */
le16enc(ptr + 138, basetable->gpt_entries); /* d_npartitions */
le32enc(ptr + 140, BBSIZE); /* d_bbsize */
basetable->gpt_first = 0;
basetable->gpt_last = msize - 1;
basetable->gpt_isleaf = 1;
baseentry = g_part_new_entry(basetable, RAW_PART + 1,
basetable->gpt_first, basetable->gpt_last);
baseentry->gpe_internal = 1;
entry = (struct g_part_bsd_entry *)baseentry;
entry->part.p_size = basetable->gpt_last + 1;
entry->part.p_offset = table->offset;
return (0);
}
static int
g_part_bsd_destroy(struct g_part_table *basetable, struct g_part_parms *gpp)
{
struct g_part_bsd_table *table;
table = (struct g_part_bsd_table *)basetable;
if (table->bbarea != NULL)
g_free(table->bbarea);
table->bbarea = NULL;
/* Wipe the second sector to clear the partitioning. */
basetable->gpt_smhead |= 2;
return (0);
}
static void
g_part_bsd_dumpconf(struct g_part_table *table, struct g_part_entry *baseentry,
struct sbuf *sb, const char *indent)
{
struct g_part_bsd_entry *entry;
entry = (struct g_part_bsd_entry *)baseentry;
if (indent == NULL) {
/* conftxt: libdisk compatibility */
sbuf_printf(sb, " xs BSD xt %u", entry->part.p_fstype);
} else if (entry != NULL) {
/* confxml: partition entry information */
sbuf_printf(sb, "%s<rawtype>%u</rawtype>\n", indent,
entry->part.p_fstype);
} else {
/* confxml: scheme information */
}
}
static int
g_part_bsd_dumpto(struct g_part_table *table, struct g_part_entry *baseentry)
{
struct g_part_bsd_entry *entry;
/* Allow dumping to a swap partition or an unused partition. */
entry = (struct g_part_bsd_entry *)baseentry;
return ((entry->part.p_fstype == FS_UNUSED ||
entry->part.p_fstype == FS_SWAP) ? 1 : 0);
}
static int
g_part_bsd_modify(struct g_part_table *basetable,
struct g_part_entry *baseentry, struct g_part_parms *gpp)
{
struct g_part_bsd_entry *entry;
if (gpp->gpp_parms & G_PART_PARM_LABEL)
return (EINVAL);
entry = (struct g_part_bsd_entry *)baseentry;
if (gpp->gpp_parms & G_PART_PARM_TYPE)
return (bsd_parse_type(gpp->gpp_type, &entry->part.p_fstype));
return (0);
}
static int
g_part_bsd_resize(struct g_part_table *basetable,
struct g_part_entry *baseentry, struct g_part_parms *gpp)
{
struct g_part_bsd_entry *entry;
entry = (struct g_part_bsd_entry *)baseentry;
baseentry->gpe_end = baseentry->gpe_start + gpp->gpp_size - 1;
entry->part.p_size = gpp->gpp_size;
return (0);
}
static const char *
g_part_bsd_name(struct g_part_table *table, struct g_part_entry *baseentry,
char *buf, size_t bufsz)
{
snprintf(buf, bufsz, "%c", 'a' + baseentry->gpe_index - 1);
return (buf);
}
static int
g_part_bsd_probe(struct g_part_table *table, struct g_consumer *cp)
{
struct g_provider *pp;
u_char *buf;
uint32_t magic1, magic2;
int error;
pp = cp->provider;
/* Sanity-check the provider. */
if (pp->sectorsize < sizeof(struct disklabel) ||
pp->mediasize < BBSIZE)
return (ENOSPC);
if (BBSIZE % pp->sectorsize)
return (ENOTBLK);
/* Check that there's a disklabel. */
buf = g_read_data(cp, pp->sectorsize, pp->sectorsize, &error);
if (buf == NULL)
return (error);
magic1 = le32dec(buf + 0);
magic2 = le32dec(buf + 132);
g_free(buf);
return ((magic1 == DISKMAGIC && magic2 == DISKMAGIC)
? G_PART_PROBE_PRI_HIGH : ENXIO);
}
static int
g_part_bsd_read(struct g_part_table *basetable, struct g_consumer *cp)
{
struct g_provider *pp;
struct g_part_bsd_table *table;
struct g_part_entry *baseentry;
struct g_part_bsd_entry *entry;
struct partition part;
u_char *buf, *p;
off_t chs, msize;
u_int sectors, heads;
int error, index;
pp = cp->provider;
table = (struct g_part_bsd_table *)basetable;
msize = MIN(pp->mediasize / pp->sectorsize, UINT32_MAX);
table->bbarea = g_read_data(cp, 0, BBSIZE, &error);
if (table->bbarea == NULL)
return (error);
buf = table->bbarea + pp->sectorsize;
if (le32dec(buf + 40) != pp->sectorsize)
goto invalid_label;
sectors = le32dec(buf + 44);
if (sectors < 1 || sectors > 255)
goto invalid_label;
if (sectors != basetable->gpt_sectors && !basetable->gpt_fixgeom) {
g_part_geometry_heads(msize, sectors, &chs, &heads);
if (chs != 0) {
basetable->gpt_sectors = sectors;
basetable->gpt_heads = heads;
}
}
heads = le32dec(buf + 48);
if (heads < 1 || heads > 255)
goto invalid_label;
if (heads != basetable->gpt_heads && !basetable->gpt_fixgeom)
basetable->gpt_heads = heads;
if (sectors != basetable->gpt_sectors || heads != basetable->gpt_heads)
printf("GEOM: %s: geometry does not match label"
" (%uh,%us != %uh,%us).\n", pp->name, heads, sectors,
basetable->gpt_heads, basetable->gpt_sectors);
chs = le32dec(buf + 60);
if (chs < 1)
goto invalid_label;
/* Fix-up a sysinstall bug. */
if (chs > msize) {
chs = msize;
le32enc(buf + 60, msize);
}
if (chs != msize)
printf("GEOM: %s: media size does not match label.\n",
pp->name);
basetable->gpt_first = 0;
basetable->gpt_last = msize - 1;
basetable->gpt_isleaf = 1;
basetable->gpt_entries = le16dec(buf + 138);
if (basetable->gpt_entries < g_part_bsd_scheme.gps_minent ||
basetable->gpt_entries > g_part_bsd_scheme.gps_maxent)
goto invalid_label;
table->offset = le32dec(buf + 148 + RAW_PART * 16 + 4);
for (index = basetable->gpt_entries - 1; index >= 0; index--) {
p = buf + 148 + index * 16;
part.p_size = le32dec(p + 0);
part.p_offset = le32dec(p + 4);
part.p_fsize = le32dec(p + 8);
part.p_fstype = p[12];
part.p_frag = p[13];
part.p_cpg = le16dec(p + 14);
if (part.p_size == 0)
continue;
if (part.p_offset < table->offset)
continue;
if (part.p_offset - table->offset > basetable->gpt_last)
goto invalid_label;
baseentry = g_part_new_entry(basetable, index + 1,
part.p_offset - table->offset,
part.p_offset - table->offset + part.p_size - 1);
entry = (struct g_part_bsd_entry *)baseentry;
entry->part = part;
if (index == RAW_PART)
baseentry->gpe_internal = 1;
}
return (0);
invalid_label:
printf("GEOM: %s: invalid disklabel.\n", pp->name);
g_free(table->bbarea);
table->bbarea = NULL;
return (EINVAL);
}
static const char *
g_part_bsd_type(struct g_part_table *basetable, struct g_part_entry *baseentry,
char *buf, size_t bufsz)
{
struct g_part_bsd_entry *entry;
int type;
entry = (struct g_part_bsd_entry *)baseentry;
type = entry->part.p_fstype;
if (type == FS_SWAP)
return (g_part_alias_name(G_PART_ALIAS_FREEBSD_SWAP));
if (type == FS_BSDFFS)
return (g_part_alias_name(G_PART_ALIAS_FREEBSD_UFS));
if (type == FS_VINUM)
return (g_part_alias_name(G_PART_ALIAS_FREEBSD_VINUM));
if (type == FS_ZFS)
return (g_part_alias_name(G_PART_ALIAS_FREEBSD_ZFS));
snprintf(buf, bufsz, "!%d", type);
return (buf);
}
static int
g_part_bsd_write(struct g_part_table *basetable, struct g_consumer *cp)
{
struct g_provider *pp;
struct g_part_entry *baseentry;
struct g_part_bsd_entry *entry;
struct g_part_bsd_table *table;
uint16_t sum;
u_char *label, *p, *pe;
int error, index;
pp = cp->provider;
table = (struct g_part_bsd_table *)basetable;
baseentry = LIST_FIRST(&basetable->gpt_entry);
label = table->bbarea + pp->sectorsize;
for (index = 1; index <= basetable->gpt_entries; index++) {
p = label + 148 + (index - 1) * 16;
entry = (baseentry != NULL && index == baseentry->gpe_index)
? (struct g_part_bsd_entry *)baseentry : NULL;
if (entry != NULL && !baseentry->gpe_deleted) {
le32enc(p + 0, entry->part.p_size);
le32enc(p + 4, entry->part.p_offset);
le32enc(p + 8, entry->part.p_fsize);
p[12] = entry->part.p_fstype;
p[13] = entry->part.p_frag;
le16enc(p + 14, entry->part.p_cpg);
} else
bzero(p, 16);
if (entry != NULL)
baseentry = LIST_NEXT(baseentry, gpe_entry);
}
/* Calculate checksum. */
le16enc(label + 136, 0);
pe = label + 148 + basetable->gpt_entries * 16;
sum = 0;
for (p = label; p < pe; p += 2)
sum ^= le16dec(p);
le16enc(label + 136, sum);
error = g_write_data(cp, 0, table->bbarea, BBSIZE);
return (error);
}