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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/geom/part/g_part_vtoc8.c |
/*-
* Copyright (c) 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_vtoc8.c 226934 2011-10-30 12:23:00Z marius $");
#include <sys/param.h>
#include <sys/bio.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 <sys/vtoc.h>
#include <geom/geom.h>
#include <geom/part/g_part.h>
#include "g_part_if.h"
FEATURE(geom_part_vtoc8, "GEOM partitioning class for SMI VTOC8 disk labels");
struct g_part_vtoc8_table {
struct g_part_table base;
struct vtoc8 vtoc;
uint32_t secpercyl;
};
static int g_part_vtoc8_add(struct g_part_table *, struct g_part_entry *,
struct g_part_parms *);
static int g_part_vtoc8_create(struct g_part_table *, struct g_part_parms *);
static int g_part_vtoc8_destroy(struct g_part_table *, struct g_part_parms *);
static void g_part_vtoc8_dumpconf(struct g_part_table *,
struct g_part_entry *, struct sbuf *, const char *);
static int g_part_vtoc8_dumpto(struct g_part_table *, struct g_part_entry *);
static int g_part_vtoc8_modify(struct g_part_table *, struct g_part_entry *,
struct g_part_parms *);
static const char *g_part_vtoc8_name(struct g_part_table *,
struct g_part_entry *, char *, size_t);
static int g_part_vtoc8_probe(struct g_part_table *, struct g_consumer *);
static int g_part_vtoc8_read(struct g_part_table *, struct g_consumer *);
static const char *g_part_vtoc8_type(struct g_part_table *,
struct g_part_entry *, char *, size_t);
static int g_part_vtoc8_write(struct g_part_table *, struct g_consumer *);
static int g_part_vtoc8_resize(struct g_part_table *, struct g_part_entry *,
struct g_part_parms *);
static kobj_method_t g_part_vtoc8_methods[] = {
KOBJMETHOD(g_part_add, g_part_vtoc8_add),
KOBJMETHOD(g_part_create, g_part_vtoc8_create),
KOBJMETHOD(g_part_destroy, g_part_vtoc8_destroy),
KOBJMETHOD(g_part_dumpconf, g_part_vtoc8_dumpconf),
KOBJMETHOD(g_part_dumpto, g_part_vtoc8_dumpto),
KOBJMETHOD(g_part_modify, g_part_vtoc8_modify),
KOBJMETHOD(g_part_resize, g_part_vtoc8_resize),
KOBJMETHOD(g_part_name, g_part_vtoc8_name),
KOBJMETHOD(g_part_probe, g_part_vtoc8_probe),
KOBJMETHOD(g_part_read, g_part_vtoc8_read),
KOBJMETHOD(g_part_type, g_part_vtoc8_type),
KOBJMETHOD(g_part_write, g_part_vtoc8_write),
{ 0, 0 }
};
static struct g_part_scheme g_part_vtoc8_scheme = {
"VTOC8",
g_part_vtoc8_methods,
sizeof(struct g_part_vtoc8_table),
.gps_entrysz = sizeof(struct g_part_entry),
.gps_minent = VTOC8_NPARTS,
.gps_maxent = VTOC8_NPARTS,
};
G_PART_SCHEME_DECLARE(g_part_vtoc8);
static int
vtoc8_parse_type(const char *type, uint16_t *tag)
{
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 >= 65536)
return (EINVAL);
*tag = (uint16_t)lt;
return (0);
}
alias = g_part_alias_name(G_PART_ALIAS_FREEBSD_SWAP);
if (!strcasecmp(type, alias)) {
*tag = VTOC_TAG_FREEBSD_SWAP;
return (0);
}
alias = g_part_alias_name(G_PART_ALIAS_FREEBSD_UFS);
if (!strcasecmp(type, alias)) {
*tag = VTOC_TAG_FREEBSD_UFS;
return (0);
}
alias = g_part_alias_name(G_PART_ALIAS_FREEBSD_VINUM);
if (!strcasecmp(type, alias)) {
*tag = VTOC_TAG_FREEBSD_VINUM;
return (0);
}
alias = g_part_alias_name(G_PART_ALIAS_FREEBSD_ZFS);
if (!strcasecmp(type, alias)) {
*tag = VTOC_TAG_FREEBSD_ZFS;
return (0);
}
return (EINVAL);
}
static int
g_part_vtoc8_add(struct g_part_table *basetable, struct g_part_entry *entry,
struct g_part_parms *gpp)
{
struct g_part_vtoc8_table *table;
int error, index;
uint64_t start, size;
uint16_t tag;
if (gpp->gpp_parms & G_PART_PARM_LABEL)
return (EINVAL);
error = vtoc8_parse_type(gpp->gpp_type, &tag);
if (error)
return (error);
table = (struct g_part_vtoc8_table *)basetable;
index = entry->gpe_index - 1;
start = gpp->gpp_start;
size = gpp->gpp_size;
if (start % table->secpercyl) {
size = size - table->secpercyl + (start % table->secpercyl);
start = start - (start % table->secpercyl) + table->secpercyl;
}
if (size % table->secpercyl)
size = size - (size % table->secpercyl);
if (size < table->secpercyl)
return (EINVAL);
KASSERT(entry->gpe_start <= start, (__func__));
KASSERT(entry->gpe_end >= start + size - 1, (__func__));
entry->gpe_start = start;
entry->gpe_end = start + size - 1;
be16enc(&table->vtoc.part[index].tag, tag);
be16enc(&table->vtoc.part[index].flag, 0);
be32enc(&table->vtoc.timestamp[index], 0);
be32enc(&table->vtoc.map[index].cyl, start / table->secpercyl);
be32enc(&table->vtoc.map[index].nblks, size);
return (0);
}
static int
g_part_vtoc8_create(struct g_part_table *basetable, struct g_part_parms *gpp)
{
struct g_provider *pp;
struct g_part_entry *entry;
struct g_part_vtoc8_table *table;
uint64_t msize;
uint32_t acyls, ncyls, pcyls;
pp = gpp->gpp_provider;
if (pp->sectorsize < sizeof(struct vtoc8))
return (ENOSPC);
if (pp->sectorsize > sizeof(struct vtoc8))
return (ENXIO);
table = (struct g_part_vtoc8_table *)basetable;
msize = MIN(pp->mediasize / pp->sectorsize, UINT32_MAX);
table->secpercyl = basetable->gpt_sectors * basetable->gpt_heads;
pcyls = msize / table->secpercyl;
acyls = 2;
ncyls = pcyls - acyls;
msize = ncyls * table->secpercyl;
sprintf(table->vtoc.ascii, "FreeBSD%lldM cyl %u alt %u hd %u sec %u",
(long long)(msize / 2048), ncyls, acyls, basetable->gpt_heads,
basetable->gpt_sectors);
be32enc(&table->vtoc.version, VTOC_VERSION);
be16enc(&table->vtoc.nparts, VTOC8_NPARTS);
be32enc(&table->vtoc.sanity, VTOC_SANITY);
be16enc(&table->vtoc.rpm, 3600);
be16enc(&table->vtoc.physcyls, pcyls);
be16enc(&table->vtoc.ncyls, ncyls);
be16enc(&table->vtoc.altcyls, acyls);
be16enc(&table->vtoc.nheads, basetable->gpt_heads);
be16enc(&table->vtoc.nsecs, basetable->gpt_sectors);
be16enc(&table->vtoc.magic, VTOC_MAGIC);
basetable->gpt_first = 0;
basetable->gpt_last = msize - 1;
basetable->gpt_isleaf = 1;
entry = g_part_new_entry(basetable, VTOC_RAW_PART + 1,
basetable->gpt_first, basetable->gpt_last);
entry->gpe_internal = 1;
be16enc(&table->vtoc.part[VTOC_RAW_PART].tag, VTOC_TAG_BACKUP);
be32enc(&table->vtoc.map[VTOC_RAW_PART].nblks, msize);
return (0);
}
static int
g_part_vtoc8_destroy(struct g_part_table *basetable, struct g_part_parms *gpp)
{
/* Wipe the first sector to clear the partitioning. */
basetable->gpt_smhead |= 1;
return (0);
}
static void
g_part_vtoc8_dumpconf(struct g_part_table *basetable,
struct g_part_entry *entry, struct sbuf *sb, const char *indent)
{
struct g_part_vtoc8_table *table;
table = (struct g_part_vtoc8_table *)basetable;
if (indent == NULL) {
/* conftxt: libdisk compatibility */
sbuf_printf(sb, " xs SUN sc %u hd %u alt %u",
be16dec(&table->vtoc.nsecs), be16dec(&table->vtoc.nheads),
be16dec(&table->vtoc.altcyls));
} else if (entry != NULL) {
/* confxml: partition entry information */
sbuf_printf(sb, "%s<rawtype>%u</rawtype>\n", indent,
be16dec(&table->vtoc.part[entry->gpe_index - 1].tag));
} else {
/* confxml: scheme information */
}
}
static int
g_part_vtoc8_dumpto(struct g_part_table *basetable,
struct g_part_entry *entry)
{
struct g_part_vtoc8_table *table;
uint16_t tag;
/*
* Allow dumping to a swap partition or a partition that
* has no type.
*/
table = (struct g_part_vtoc8_table *)basetable;
tag = be16dec(&table->vtoc.part[entry->gpe_index - 1].tag);
return ((tag == 0 || tag == VTOC_TAG_FREEBSD_SWAP ||
tag == VTOC_TAG_SWAP) ? 1 : 0);
}
static int
g_part_vtoc8_modify(struct g_part_table *basetable,
struct g_part_entry *entry, struct g_part_parms *gpp)
{
struct g_part_vtoc8_table *table;
int error;
uint16_t tag;
if (gpp->gpp_parms & G_PART_PARM_LABEL)
return (EINVAL);
table = (struct g_part_vtoc8_table *)basetable;
if (gpp->gpp_parms & G_PART_PARM_TYPE) {
error = vtoc8_parse_type(gpp->gpp_type, &tag);
if (error)
return(error);
be16enc(&table->vtoc.part[entry->gpe_index - 1].tag, tag);
}
return (0);
}
static int
g_part_vtoc8_resize(struct g_part_table *basetable,
struct g_part_entry *entry, struct g_part_parms *gpp)
{
struct g_part_vtoc8_table *table;
uint64_t size;
table = (struct g_part_vtoc8_table *)basetable;
size = gpp->gpp_size;
if (size % table->secpercyl)
size = size - (size % table->secpercyl);
if (size < table->secpercyl)
return (EINVAL);
entry->gpe_end = entry->gpe_start + size - 1;
be32enc(&table->vtoc.map[entry->gpe_index - 1].nblks, size);
return (0);
}
static const char *
g_part_vtoc8_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_vtoc8_probe(struct g_part_table *table, struct g_consumer *cp)
{
struct g_provider *pp;
u_char *buf;
int error, ofs, res;
uint16_t cksum, magic;
pp = cp->provider;
/* Sanity-check the provider. */
if (pp->sectorsize != sizeof(struct vtoc8))
return (ENOSPC);
/* Check that there's a disklabel. */
buf = g_read_data(cp, 0, pp->sectorsize, &error);
if (buf == NULL)
return (error);
res = ENXIO; /* Assume mismatch */
/* Check the magic */
magic = be16dec(buf + offsetof(struct vtoc8, magic));
if (magic != VTOC_MAGIC)
goto out;
/* Check the sum */
cksum = 0;
for (ofs = 0; ofs < sizeof(struct vtoc8); ofs += 2)
cksum ^= be16dec(buf + ofs);
if (cksum != 0)
goto out;
res = G_PART_PROBE_PRI_NORM;
out:
g_free(buf);
return (res);
}
static int
g_part_vtoc8_read(struct g_part_table *basetable, struct g_consumer *cp)
{
struct g_provider *pp;
struct g_part_vtoc8_table *table;
struct g_part_entry *entry;
u_char *buf;
off_t chs, msize;
uint64_t offset, size;
u_int cyls, heads, sectors;
int error, index, withtags;
uint16_t tag;
pp = cp->provider;
buf = g_read_data(cp, 0, pp->sectorsize, &error);
if (buf == NULL)
return (error);
table = (struct g_part_vtoc8_table *)basetable;
bcopy(buf, &table->vtoc, sizeof(table->vtoc));
g_free(buf);
msize = MIN(pp->mediasize / pp->sectorsize, UINT32_MAX);
sectors = be16dec(&table->vtoc.nsecs);
if (sectors < 1)
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 = be16dec(&table->vtoc.nheads);
if (heads < 1)
goto invalid_label;
if (heads != basetable->gpt_heads && !basetable->gpt_fixgeom)
basetable->gpt_heads = heads;
/*
* Except for ATA disks > 32GB, Solaris uses the native geometry
* as reported by the target for the labels while da(4) typically
* uses a synthetic one so we don't complain too loudly if these
* geometries don't match.
*/
if (bootverbose && (sectors != basetable->gpt_sectors ||
heads != basetable->gpt_heads))
printf("GEOM: %s: geometry does not match VTOC8 label "
"(label: %uh,%us GEOM: %uh,%us).\n", pp->name, heads,
sectors, basetable->gpt_heads, basetable->gpt_sectors);
table->secpercyl = heads * sectors;
cyls = be16dec(&table->vtoc.ncyls);
chs = cyls * table->secpercyl;
if (chs < 1 || chs > msize)
goto invalid_label;
basetable->gpt_first = 0;
basetable->gpt_last = chs - 1;
basetable->gpt_isleaf = 1;
withtags = (be32dec(&table->vtoc.sanity) == VTOC_SANITY) ? 1 : 0;
if (!withtags) {
printf("GEOM: %s: adding VTOC8 information.\n", pp->name);
be32enc(&table->vtoc.version, VTOC_VERSION);
bzero(&table->vtoc.volume, VTOC_VOLUME_LEN);
be16enc(&table->vtoc.nparts, VTOC8_NPARTS);
bzero(&table->vtoc.part, sizeof(table->vtoc.part));
be32enc(&table->vtoc.sanity, VTOC_SANITY);
}
basetable->gpt_entries = be16dec(&table->vtoc.nparts);
if (basetable->gpt_entries < g_part_vtoc8_scheme.gps_minent ||
basetable->gpt_entries > g_part_vtoc8_scheme.gps_maxent)
goto invalid_label;
for (index = basetable->gpt_entries - 1; index >= 0; index--) {
offset = be32dec(&table->vtoc.map[index].cyl) *
table->secpercyl;
size = be32dec(&table->vtoc.map[index].nblks);
if (size == 0)
continue;
if (withtags)
tag = be16dec(&table->vtoc.part[index].tag);
else
tag = (index == VTOC_RAW_PART)
? VTOC_TAG_BACKUP
: VTOC_TAG_UNASSIGNED;
if (index == VTOC_RAW_PART && tag != VTOC_TAG_BACKUP)
continue;
if (index != VTOC_RAW_PART && tag == VTOC_TAG_BACKUP)
continue;
entry = g_part_new_entry(basetable, index + 1, offset,
offset + size - 1);
if (tag == VTOC_TAG_BACKUP)
entry->gpe_internal = 1;
if (!withtags)
be16enc(&table->vtoc.part[index].tag, tag);
}
return (0);
invalid_label:
printf("GEOM: %s: invalid VTOC8 label.\n", pp->name);
return (EINVAL);
}
static const char *
g_part_vtoc8_type(struct g_part_table *basetable, struct g_part_entry *entry,
char *buf, size_t bufsz)
{
struct g_part_vtoc8_table *table;
uint16_t tag;
table = (struct g_part_vtoc8_table *)basetable;
tag = be16dec(&table->vtoc.part[entry->gpe_index - 1].tag);
if (tag == VTOC_TAG_FREEBSD_SWAP)
return (g_part_alias_name(G_PART_ALIAS_FREEBSD_SWAP));
if (tag == VTOC_TAG_FREEBSD_UFS)
return (g_part_alias_name(G_PART_ALIAS_FREEBSD_UFS));
if (tag == VTOC_TAG_FREEBSD_VINUM)
return (g_part_alias_name(G_PART_ALIAS_FREEBSD_VINUM));
if (tag == VTOC_TAG_FREEBSD_ZFS)
return (g_part_alias_name(G_PART_ALIAS_FREEBSD_ZFS));
snprintf(buf, bufsz, "!%d", tag);
return (buf);
}
static int
g_part_vtoc8_write(struct g_part_table *basetable, struct g_consumer *cp)
{
struct g_provider *pp;
struct g_part_entry *entry;
struct g_part_vtoc8_table *table;
uint16_t sum;
u_char *p;
int error, index, match, offset;
pp = cp->provider;
table = (struct g_part_vtoc8_table *)basetable;
entry = LIST_FIRST(&basetable->gpt_entry);
for (index = 0; index < basetable->gpt_entries; index++) {
match = (entry != NULL && index == entry->gpe_index - 1)
? 1 : 0;
if (match) {
if (entry->gpe_deleted) {
be16enc(&table->vtoc.part[index].tag, 0);
be16enc(&table->vtoc.part[index].flag, 0);
be32enc(&table->vtoc.map[index].cyl, 0);
be32enc(&table->vtoc.map[index].nblks, 0);
}
entry = LIST_NEXT(entry, gpe_entry);
}
}
/* Calculate checksum. */
sum = 0;
p = (void *)&table->vtoc;
for (offset = 0; offset < sizeof(table->vtoc) - 2; offset += 2)
sum ^= be16dec(p + offset);
be16enc(&table->vtoc.cksum, sum);
error = g_write_data(cp, 0, p, pp->sectorsize);
return (error);
}