| Current Path : /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 : //sys/geom/part/g_part_pc98.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_pc98.c 222281 2011-05-25 09:45:13Z ae $");
#include <sys/param.h>
#include <sys/bio.h>
#include <sys/diskpc98.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_pc98, "GEOM partitioning class for PC-9800 disk partitions");
#define SECSIZE 512
#define MENUSIZE 7168
#define BOOTSIZE 8192
struct g_part_pc98_table {
struct g_part_table base;
u_char boot[SECSIZE];
u_char table[SECSIZE];
u_char menu[MENUSIZE];
};
struct g_part_pc98_entry {
struct g_part_entry base;
struct pc98_partition ent;
};
static int g_part_pc98_add(struct g_part_table *, struct g_part_entry *,
struct g_part_parms *);
static int g_part_pc98_bootcode(struct g_part_table *, struct g_part_parms *);
static int g_part_pc98_create(struct g_part_table *, struct g_part_parms *);
static int g_part_pc98_destroy(struct g_part_table *, struct g_part_parms *);
static void g_part_pc98_dumpconf(struct g_part_table *, struct g_part_entry *,
struct sbuf *, const char *);
static int g_part_pc98_dumpto(struct g_part_table *, struct g_part_entry *);
static int g_part_pc98_modify(struct g_part_table *, struct g_part_entry *,
struct g_part_parms *);
static const char *g_part_pc98_name(struct g_part_table *, struct g_part_entry *,
char *, size_t);
static int g_part_pc98_probe(struct g_part_table *, struct g_consumer *);
static int g_part_pc98_read(struct g_part_table *, struct g_consumer *);
static int g_part_pc98_setunset(struct g_part_table *, struct g_part_entry *,
const char *, unsigned int);
static const char *g_part_pc98_type(struct g_part_table *,
struct g_part_entry *, char *, size_t);
static int g_part_pc98_write(struct g_part_table *, struct g_consumer *);
static int g_part_pc98_resize(struct g_part_table *, struct g_part_entry *,
struct g_part_parms *);
static kobj_method_t g_part_pc98_methods[] = {
KOBJMETHOD(g_part_add, g_part_pc98_add),
KOBJMETHOD(g_part_bootcode, g_part_pc98_bootcode),
KOBJMETHOD(g_part_create, g_part_pc98_create),
KOBJMETHOD(g_part_destroy, g_part_pc98_destroy),
KOBJMETHOD(g_part_dumpconf, g_part_pc98_dumpconf),
KOBJMETHOD(g_part_dumpto, g_part_pc98_dumpto),
KOBJMETHOD(g_part_modify, g_part_pc98_modify),
KOBJMETHOD(g_part_resize, g_part_pc98_resize),
KOBJMETHOD(g_part_name, g_part_pc98_name),
KOBJMETHOD(g_part_probe, g_part_pc98_probe),
KOBJMETHOD(g_part_read, g_part_pc98_read),
KOBJMETHOD(g_part_setunset, g_part_pc98_setunset),
KOBJMETHOD(g_part_type, g_part_pc98_type),
KOBJMETHOD(g_part_write, g_part_pc98_write),
{ 0, 0 }
};
static struct g_part_scheme g_part_pc98_scheme = {
"PC98",
g_part_pc98_methods,
sizeof(struct g_part_pc98_table),
.gps_entrysz = sizeof(struct g_part_pc98_entry),
.gps_minent = NDOSPART,
.gps_maxent = NDOSPART,
.gps_bootcodesz = BOOTSIZE,
};
G_PART_SCHEME_DECLARE(g_part_pc98);
static int
pc98_parse_type(const char *type, u_char *dp_mid, u_char *dp_sid)
{
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);
/* Make sure the active and bootable flags aren't set. */
if (lt & ((PC98_SID_ACTIVE << 8) | PC98_MID_BOOTABLE))
return (ENOATTR);
*dp_mid = (*dp_mid & PC98_MID_BOOTABLE) | (u_char)lt;
*dp_sid = (*dp_sid & PC98_SID_ACTIVE) | (u_char)(lt >> 8);
return (0);
}
alias = g_part_alias_name(G_PART_ALIAS_FREEBSD);
if (!strcasecmp(type, alias)) {
*dp_mid = (*dp_mid & PC98_MID_BOOTABLE) | PC98_MID_386BSD;
*dp_sid = (*dp_sid & PC98_SID_ACTIVE) | PC98_SID_386BSD;
return (0);
}
return (EINVAL);
}
static int
pc98_set_slicename(const char *label, u_char *dp_name)
{
int len;
len = strlen(label);
if (len > sizeof(((struct pc98_partition *)NULL)->dp_name))
return (EINVAL);
bzero(dp_name, sizeof(((struct pc98_partition *)NULL)->dp_name));
strncpy(dp_name, label, len);
return (0);
}
static void
pc98_set_chs(struct g_part_table *table, uint32_t lba, u_short *cylp,
u_char *hdp, u_char *secp)
{
uint32_t cyl, hd, sec;
sec = lba % table->gpt_sectors + 1;
lba /= table->gpt_sectors;
hd = lba % table->gpt_heads;
lba /= table->gpt_heads;
cyl = lba;
*cylp = htole16(cyl);
*hdp = hd;
*secp = sec;
}
static int
g_part_pc98_add(struct g_part_table *basetable, struct g_part_entry *baseentry,
struct g_part_parms *gpp)
{
struct g_part_pc98_entry *entry;
struct g_part_pc98_table *table;
uint32_t cyl, start, size;
int error;
cyl = basetable->gpt_heads * basetable->gpt_sectors;
entry = (struct g_part_pc98_entry *)baseentry;
table = (struct g_part_pc98_table *)basetable;
start = gpp->gpp_start;
size = gpp->gpp_size;
if (size < cyl)
return (EINVAL);
if (start % cyl) {
size = size - cyl + (start % cyl);
start = start - (start % cyl) + cyl;
}
if (size % cyl)
size = size - (size % cyl);
if (size < cyl)
return (EINVAL);
if (baseentry->gpe_deleted)
bzero(&entry->ent, sizeof(entry->ent));
else
entry->ent.dp_mid = entry->ent.dp_sid = 0;
KASSERT(baseentry->gpe_start <= start, (__func__));
KASSERT(baseentry->gpe_end >= start + size - 1, (__func__));
baseentry->gpe_start = start;
baseentry->gpe_end = start + size - 1;
pc98_set_chs(basetable, baseentry->gpe_start, &entry->ent.dp_scyl,
&entry->ent.dp_shd, &entry->ent.dp_ssect);
pc98_set_chs(basetable, baseentry->gpe_end, &entry->ent.dp_ecyl,
&entry->ent.dp_ehd, &entry->ent.dp_esect);
error = pc98_parse_type(gpp->gpp_type, &entry->ent.dp_mid,
&entry->ent.dp_sid);
if (error)
return (error);
if (gpp->gpp_parms & G_PART_PARM_LABEL)
return (pc98_set_slicename(gpp->gpp_label, entry->ent.dp_name));
return (0);
}
static int
g_part_pc98_bootcode(struct g_part_table *basetable, struct g_part_parms *gpp)
{
struct g_part_pc98_table *table;
const u_char *codeptr;
if (gpp->gpp_codesize != BOOTSIZE)
return (EINVAL);
table = (struct g_part_pc98_table *)basetable;
codeptr = gpp->gpp_codeptr;
bcopy(codeptr, table->boot, SECSIZE);
bcopy(codeptr + SECSIZE*2, table->menu, MENUSIZE);
return (0);
}
static int
g_part_pc98_create(struct g_part_table *basetable, struct g_part_parms *gpp)
{
struct g_provider *pp;
struct g_part_pc98_table *table;
pp = gpp->gpp_provider;
if (pp->sectorsize < SECSIZE || pp->mediasize < BOOTSIZE)
return (ENOSPC);
if (pp->sectorsize > SECSIZE)
return (ENXIO);
basetable->gpt_first = basetable->gpt_heads * basetable->gpt_sectors;
basetable->gpt_last = MIN(pp->mediasize / SECSIZE, UINT32_MAX) - 1;
table = (struct g_part_pc98_table *)basetable;
le16enc(table->boot + DOSMAGICOFFSET, DOSMAGIC);
return (0);
}
static int
g_part_pc98_destroy(struct g_part_table *basetable, struct g_part_parms *gpp)
{
/* Wipe the first two sectors to clear the partitioning. */
basetable->gpt_smhead |= 3;
return (0);
}
static void
g_part_pc98_dumpconf(struct g_part_table *table,
struct g_part_entry *baseentry, struct sbuf *sb, const char *indent)
{
struct g_part_pc98_entry *entry;
char name[sizeof(entry->ent.dp_name) + 1];
u_int type;
entry = (struct g_part_pc98_entry *)baseentry;
if (entry == NULL) {
/* confxml: scheme information */
return;
}
type = entry->ent.dp_mid + (entry->ent.dp_sid << 8);
strncpy(name, entry->ent.dp_name, sizeof(name) - 1);
name[sizeof(name) - 1] = '\0';
if (indent == NULL) {
/* conftxt: libdisk compatibility */
sbuf_printf(sb, " xs PC98 xt %u sn %s", type, name);
} else {
/* confxml: partition entry information */
sbuf_printf(sb, "%s<label>%s</label>\n", indent, name);
if (entry->ent.dp_mid & PC98_MID_BOOTABLE)
sbuf_printf(sb, "%s<attrib>bootable</attrib>\n",
indent);
if (entry->ent.dp_sid & PC98_SID_ACTIVE)
sbuf_printf(sb, "%s<attrib>active</attrib>\n", indent);
sbuf_printf(sb, "%s<rawtype>%u</rawtype>\n", indent,
type & 0x7f7f);
}
}
static int
g_part_pc98_dumpto(struct g_part_table *table, struct g_part_entry *baseentry)
{
struct g_part_pc98_entry *entry;
/* Allow dumping to a FreeBSD partition only. */
entry = (struct g_part_pc98_entry *)baseentry;
return (((entry->ent.dp_mid & PC98_MID_MASK) == PC98_MID_386BSD &&
(entry->ent.dp_sid & PC98_SID_MASK) == PC98_SID_386BSD) ? 1 : 0);
}
static int
g_part_pc98_modify(struct g_part_table *basetable,
struct g_part_entry *baseentry, struct g_part_parms *gpp)
{
struct g_part_pc98_entry *entry;
int error;
entry = (struct g_part_pc98_entry *)baseentry;
if (gpp->gpp_parms & G_PART_PARM_TYPE) {
error = pc98_parse_type(gpp->gpp_type, &entry->ent.dp_mid,
&entry->ent.dp_sid);
if (error)
return (error);
}
if (gpp->gpp_parms & G_PART_PARM_LABEL)
return (pc98_set_slicename(gpp->gpp_label, entry->ent.dp_name));
return (0);
}
static int
g_part_pc98_resize(struct g_part_table *basetable,
struct g_part_entry *baseentry, struct g_part_parms *gpp)
{
struct g_part_pc98_entry *entry;
uint32_t size, cyl;
cyl = basetable->gpt_heads * basetable->gpt_sectors;
size = gpp->gpp_size;
if (size < cyl)
return (EINVAL);
if (size % cyl)
size = size - (size % cyl);
if (size < cyl)
return (EINVAL);
entry = (struct g_part_pc98_entry *)baseentry;
baseentry->gpe_end = baseentry->gpe_start + size - 1;
pc98_set_chs(basetable, baseentry->gpe_end, &entry->ent.dp_ecyl,
&entry->ent.dp_ehd, &entry->ent.dp_esect);
return (0);
}
static const char *
g_part_pc98_name(struct g_part_table *table, struct g_part_entry *baseentry,
char *buf, size_t bufsz)
{
snprintf(buf, bufsz, "s%d", baseentry->gpe_index);
return (buf);
}
static int
g_part_pc98_probe(struct g_part_table *table, struct g_consumer *cp)
{
struct g_provider *pp;
u_char *buf, *p;
int error, index, res, sum;
uint16_t magic, ecyl, scyl;
pp = cp->provider;
/* Sanity-check the provider. */
if (pp->sectorsize < SECSIZE || pp->mediasize < BOOTSIZE)
return (ENOSPC);
if (pp->sectorsize > SECSIZE)
return (ENXIO);
/* Check that there's a PC98 partition table. */
buf = g_read_data(cp, 0L, 2 * SECSIZE, &error);
if (buf == NULL)
return (error);
/* We goto out on mismatch. */
res = ENXIO;
magic = le16dec(buf + DOSMAGICOFFSET);
if (magic != DOSMAGIC)
goto out;
sum = 0;
for (index = SECSIZE; index < 2 * SECSIZE; index++)
sum += buf[index];
if (sum == 0) {
res = G_PART_PROBE_PRI_LOW;
goto out;
}
for (index = 0; index < NDOSPART; index++) {
p = buf + SECSIZE + index * DOSPARTSIZE;
if (p[0] == 0 || p[1] == 0) /* !dp_mid || !dp_sid */
continue;
scyl = le16dec(p + 10);
ecyl = le16dec(p + 14);
if (scyl == 0 || ecyl == 0)
goto out;
if (p[8] == p[12] && /* dp_ssect == dp_esect */
p[9] == p[13] && /* dp_shd == dp_ehd */
scyl == ecyl)
goto out;
}
res = G_PART_PROBE_PRI_HIGH;
out:
g_free(buf);
return (res);
}
static int
g_part_pc98_read(struct g_part_table *basetable, struct g_consumer *cp)
{
struct pc98_partition ent;
struct g_provider *pp;
struct g_part_pc98_table *table;
struct g_part_pc98_entry *entry;
u_char *buf, *p;
off_t msize;
off_t start, end;
u_int cyl;
int error, index;
pp = cp->provider;
table = (struct g_part_pc98_table *)basetable;
msize = MIN(pp->mediasize / SECSIZE, UINT32_MAX);
buf = g_read_data(cp, 0L, BOOTSIZE, &error);
if (buf == NULL)
return (error);
cyl = basetable->gpt_heads * basetable->gpt_sectors;
bcopy(buf, table->boot, sizeof(table->boot));
bcopy(buf + SECSIZE, table->table, sizeof(table->table));
bcopy(buf + SECSIZE*2, table->menu, sizeof(table->menu));
for (index = NDOSPART - 1; index >= 0; index--) {
p = buf + SECSIZE + index * DOSPARTSIZE;
ent.dp_mid = p[0];
ent.dp_sid = p[1];
ent.dp_dum1 = p[2];
ent.dp_dum2 = p[3];
ent.dp_ipl_sct = p[4];
ent.dp_ipl_head = p[5];
ent.dp_ipl_cyl = le16dec(p + 6);
ent.dp_ssect = p[8];
ent.dp_shd = p[9];
ent.dp_scyl = le16dec(p + 10);
ent.dp_esect = p[12];
ent.dp_ehd = p[13];
ent.dp_ecyl = le16dec(p + 14);
bcopy(p + 16, ent.dp_name, sizeof(ent.dp_name));
if (ent.dp_sid == 0)
continue;
start = ent.dp_scyl * cyl;
end = (ent.dp_ecyl + 1) * cyl - 1;
entry = (struct g_part_pc98_entry *)g_part_new_entry(basetable,
index + 1, start, end);
entry->ent = ent;
}
basetable->gpt_entries = NDOSPART;
basetable->gpt_first = cyl;
basetable->gpt_last = msize - 1;
g_free(buf);
return (0);
}
static int
g_part_pc98_setunset(struct g_part_table *table, struct g_part_entry *baseentry,
const char *attrib, unsigned int set)
{
struct g_part_entry *iter;
struct g_part_pc98_entry *entry;
int changed, mid, sid;
mid = sid = 0;
if (strcasecmp(attrib, "active") == 0)
sid = 1;
else if (strcasecmp(attrib, "bootable") == 0)
mid = 1;
if (mid == 0 && sid == 0)
return (EINVAL);
LIST_FOREACH(iter, &table->gpt_entry, gpe_entry) {
if (iter->gpe_deleted)
continue;
if (iter != baseentry)
continue;
changed = 0;
entry = (struct g_part_pc98_entry *)iter;
if (set) {
if (mid && !(entry->ent.dp_mid & PC98_MID_BOOTABLE)) {
entry->ent.dp_mid |= PC98_MID_BOOTABLE;
changed = 1;
}
if (sid && !(entry->ent.dp_sid & PC98_SID_ACTIVE)) {
entry->ent.dp_sid |= PC98_SID_ACTIVE;
changed = 1;
}
} else {
if (mid && (entry->ent.dp_mid & PC98_MID_BOOTABLE)) {
entry->ent.dp_mid &= ~PC98_MID_BOOTABLE;
changed = 1;
}
if (sid && (entry->ent.dp_sid & PC98_SID_ACTIVE)) {
entry->ent.dp_sid &= ~PC98_SID_ACTIVE;
changed = 1;
}
}
if (changed && !iter->gpe_created)
iter->gpe_modified = 1;
}
return (0);
}
static const char *
g_part_pc98_type(struct g_part_table *basetable, struct g_part_entry *baseentry,
char *buf, size_t bufsz)
{
struct g_part_pc98_entry *entry;
u_int type;
entry = (struct g_part_pc98_entry *)baseentry;
type = (entry->ent.dp_mid & PC98_MID_MASK) |
((entry->ent.dp_sid & PC98_SID_MASK) << 8);
if (type == (PC98_MID_386BSD | (PC98_SID_386BSD << 8)))
return (g_part_alias_name(G_PART_ALIAS_FREEBSD));
snprintf(buf, bufsz, "!%d", type);
return (buf);
}
static int
g_part_pc98_write(struct g_part_table *basetable, struct g_consumer *cp)
{
struct g_part_entry *baseentry;
struct g_part_pc98_entry *entry;
struct g_part_pc98_table *table;
u_char *p;
int error, index;
table = (struct g_part_pc98_table *)basetable;
baseentry = LIST_FIRST(&basetable->gpt_entry);
for (index = 1; index <= basetable->gpt_entries; index++) {
p = table->table + (index - 1) * DOSPARTSIZE;
entry = (baseentry != NULL && index == baseentry->gpe_index)
? (struct g_part_pc98_entry *)baseentry : NULL;
if (entry != NULL && !baseentry->gpe_deleted) {
p[0] = entry->ent.dp_mid;
p[1] = entry->ent.dp_sid;
p[2] = entry->ent.dp_dum1;
p[3] = entry->ent.dp_dum2;
p[4] = entry->ent.dp_ipl_sct;
p[5] = entry->ent.dp_ipl_head;
le16enc(p + 6, entry->ent.dp_ipl_cyl);
p[8] = entry->ent.dp_ssect;
p[9] = entry->ent.dp_shd;
le16enc(p + 10, entry->ent.dp_scyl);
p[12] = entry->ent.dp_esect;
p[13] = entry->ent.dp_ehd;
le16enc(p + 14, entry->ent.dp_ecyl);
bcopy(entry->ent.dp_name, p + 16,
sizeof(entry->ent.dp_name));
} else
bzero(p, DOSPARTSIZE);
if (entry != NULL)
baseentry = LIST_NEXT(baseentry, gpe_entry);
}
error = g_write_data(cp, 0, table->boot, SECSIZE);
if (!error)
error = g_write_data(cp, SECSIZE, table->table, SECSIZE);
if (!error)
error = g_write_data(cp, SECSIZE*2, table->menu, MENUSIZE);
return (error);
}