4bf0267894
The conftxt output is used by libdisk, and the confxml output is used by gpart itself (gpart show -l). Submitted by: nyan@
473 lines
13 KiB
C
473 lines
13 KiB
C
/*-
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* Copyright (c) 2008 Marcel Moolenaar
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/bio.h>
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#include <sys/diskpc98.h>
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#include <sys/endian.h>
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#include <sys/kernel.h>
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#include <sys/kobj.h>
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#include <sys/limits.h>
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#include <sys/lock.h>
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#include <sys/malloc.h>
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#include <sys/mutex.h>
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#include <sys/queue.h>
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#include <sys/sbuf.h>
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#include <sys/systm.h>
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#include <geom/geom.h>
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#include <geom/part/g_part.h>
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#include "g_part_if.h"
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#define SECSIZE 512
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struct g_part_pc98_table {
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struct g_part_table base;
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u_char boot[SECSIZE];
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u_char table[SECSIZE];
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};
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struct g_part_pc98_entry {
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struct g_part_entry base;
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struct pc98_partition ent;
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};
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static int g_part_pc98_add(struct g_part_table *, struct g_part_entry *,
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struct g_part_parms *);
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static int g_part_pc98_bootcode(struct g_part_table *, struct g_part_parms *);
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static int g_part_pc98_create(struct g_part_table *, struct g_part_parms *);
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static int g_part_pc98_destroy(struct g_part_table *, struct g_part_parms *);
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static int g_part_pc98_dumpconf(struct g_part_table *, struct g_part_entry *,
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struct sbuf *, const char *);
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static int g_part_pc98_dumpto(struct g_part_table *, struct g_part_entry *);
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static int g_part_pc98_modify(struct g_part_table *, struct g_part_entry *,
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struct g_part_parms *);
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static char *g_part_pc98_name(struct g_part_table *, struct g_part_entry *,
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char *, size_t);
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static int g_part_pc98_probe(struct g_part_table *, struct g_consumer *);
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static int g_part_pc98_read(struct g_part_table *, struct g_consumer *);
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static const char *g_part_pc98_type(struct g_part_table *, struct g_part_entry *,
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char *, size_t);
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static int g_part_pc98_write(struct g_part_table *, struct g_consumer *);
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static kobj_method_t g_part_pc98_methods[] = {
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KOBJMETHOD(g_part_add, g_part_pc98_add),
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KOBJMETHOD(g_part_bootcode, g_part_pc98_bootcode),
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KOBJMETHOD(g_part_create, g_part_pc98_create),
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KOBJMETHOD(g_part_destroy, g_part_pc98_destroy),
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KOBJMETHOD(g_part_dumpconf, g_part_pc98_dumpconf),
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KOBJMETHOD(g_part_dumpto, g_part_pc98_dumpto),
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KOBJMETHOD(g_part_modify, g_part_pc98_modify),
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KOBJMETHOD(g_part_name, g_part_pc98_name),
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KOBJMETHOD(g_part_probe, g_part_pc98_probe),
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KOBJMETHOD(g_part_read, g_part_pc98_read),
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KOBJMETHOD(g_part_type, g_part_pc98_type),
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KOBJMETHOD(g_part_write, g_part_pc98_write),
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{ 0, 0 }
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};
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static struct g_part_scheme g_part_pc98_scheme = {
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"PC98",
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g_part_pc98_methods,
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sizeof(struct g_part_pc98_table),
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.gps_entrysz = sizeof(struct g_part_pc98_entry),
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.gps_minent = NDOSPART,
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.gps_maxent = NDOSPART,
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.gps_bootcodesz = SECSIZE,
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};
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G_PART_SCHEME_DECLARE(g_part_pc98);
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static int
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pc98_parse_type(const char *type, u_char *dp_mid, u_char *dp_sid)
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{
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const char *alias;
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char *endp;
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long lt;
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if (type[0] == '!') {
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lt = strtol(type + 1, &endp, 0);
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if (type[1] == '\0' || *endp != '\0' || lt <= 0 ||
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lt >= 65536)
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return (EINVAL);
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*dp_mid = (u_char)lt;
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*dp_sid = (u_char)(lt >> 8);
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return (0);
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}
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alias = g_part_alias_name(G_PART_ALIAS_FREEBSD);
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if (!strcasecmp(type, alias)) {
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*dp_mid = (u_char)DOSMID_386BSD;
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*dp_sid = (u_char)DOSSID_386BSD;
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return (0);
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}
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return (EINVAL);
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}
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static void
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pc98_set_chs(struct g_part_table *table, uint32_t lba, u_short *cylp,
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u_char *hdp, u_char *secp)
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{
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uint32_t cyl, hd, sec;
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sec = lba % table->gpt_sectors + 1;
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lba /= table->gpt_sectors;
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hd = lba % table->gpt_heads;
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lba /= table->gpt_heads;
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cyl = lba;
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*cylp = htole16(cyl);
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*hdp = hd;
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*secp = sec;
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}
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static int
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g_part_pc98_add(struct g_part_table *basetable, struct g_part_entry *baseentry,
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struct g_part_parms *gpp)
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{
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struct g_part_pc98_entry *entry;
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struct g_part_pc98_table *table;
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uint32_t cyl, start, size;
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if (gpp->gpp_parms & G_PART_PARM_LABEL)
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return (EINVAL);
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cyl = basetable->gpt_heads * basetable->gpt_sectors;
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entry = (struct g_part_pc98_entry *)baseentry;
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table = (struct g_part_pc98_table *)basetable;
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start = gpp->gpp_start;
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size = gpp->gpp_size;
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if (size < cyl)
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return (EINVAL);
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if (start % cyl) {
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size = size - cyl + (start % cyl);
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start = start - (start % cyl) + cyl;
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}
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if (size % cyl)
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size = size - (size % cyl);
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if (size < cyl)
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return (EINVAL);
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if (baseentry->gpe_deleted)
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bzero(&entry->ent, sizeof(entry->ent));
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KASSERT(baseentry->gpe_start <= start, (__func__));
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KASSERT(baseentry->gpe_end >= start + size - 1, (__func__));
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baseentry->gpe_start = start;
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baseentry->gpe_end = start + size - 1;
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pc98_set_chs(basetable, baseentry->gpe_start, &entry->ent.dp_scyl,
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&entry->ent.dp_shd, &entry->ent.dp_ssect);
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pc98_set_chs(basetable, baseentry->gpe_end, &entry->ent.dp_ecyl,
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&entry->ent.dp_ehd, &entry->ent.dp_esect);
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return (pc98_parse_type(gpp->gpp_type, &entry->ent.dp_mid,
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&entry->ent.dp_sid));
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}
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static int
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g_part_pc98_bootcode(struct g_part_table *basetable, struct g_part_parms *gpp)
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{
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struct g_part_pc98_table *table;
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table = (struct g_part_pc98_table *)basetable;
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bcopy(gpp->gpp_codeptr, table->boot, DOSMAGICOFFSET);
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return (0);
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}
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static int
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g_part_pc98_create(struct g_part_table *basetable, struct g_part_parms *gpp)
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{
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struct g_consumer *cp;
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struct g_provider *pp;
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struct g_part_pc98_table *table;
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uint64_t msize;
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uint32_t cyl;
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pp = gpp->gpp_provider;
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cp = LIST_FIRST(&pp->consumers);
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if (pp->sectorsize < SECSIZE || pp->mediasize < 2 * SECSIZE)
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return (ENOSPC);
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if (pp->sectorsize > SECSIZE)
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return (ENXIO);
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cyl = basetable->gpt_heads * basetable->gpt_sectors;
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msize = pp->mediasize / SECSIZE;
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basetable->gpt_first = cyl;
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basetable->gpt_last = msize - (msize % cyl) - 1;
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table = (struct g_part_pc98_table *)basetable;
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le16enc(table->boot + DOSMAGICOFFSET, DOSMAGIC);
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return (0);
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}
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static int
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g_part_pc98_destroy(struct g_part_table *basetable, struct g_part_parms *gpp)
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{
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/* Wipe the first two sectors to clear the partitioning. */
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basetable->gpt_smhead |= 3;
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return (0);
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}
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static int
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g_part_pc98_dumpconf(struct g_part_table *table,
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struct g_part_entry *baseentry, struct sbuf *sb, const char *indent)
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{
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struct g_part_pc98_entry *entry;
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char name[sizeof(entry->ent.dp_name) + 1];
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u_int type;
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entry = (struct g_part_pc98_entry *)baseentry;
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if (entry == NULL) {
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/* confxml: scheme information */
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return (0);
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}
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type = entry->ent.dp_mid + (entry->ent.dp_sid << 8);
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strncpy(name, entry->ent.dp_name, sizeof(name) - 1);
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name[sizeof(name) - 1] = '\0';
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if (indent == NULL) {
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/* conftxt: libdisk compatibility */
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sbuf_printf(sb, " xs PC98 xt %u sn %s", type, name);
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} else {
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/* confxml: partition entry information */
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sbuf_printf(sb, "%s<label>%s</label>\n", indent, name);
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sbuf_printf(sb, "%s<rawtype>%u</rawtype>\n", indent, type);
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}
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return (0);
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}
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static int
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g_part_pc98_dumpto(struct g_part_table *table, struct g_part_entry *baseentry)
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{
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struct g_part_pc98_entry *entry;
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/* Allow dumping to a FreeBSD partition only. */
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entry = (struct g_part_pc98_entry *)baseentry;
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return ((entry->ent.dp_mid == DOSMID_386BSD &&
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entry->ent.dp_sid == DOSSID_386BSD) ? 1 : 0);
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}
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static int
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g_part_pc98_modify(struct g_part_table *basetable,
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struct g_part_entry *baseentry, struct g_part_parms *gpp)
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{
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struct g_part_pc98_entry *entry;
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if (gpp->gpp_parms & G_PART_PARM_LABEL)
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return (EINVAL);
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entry = (struct g_part_pc98_entry *)baseentry;
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if (gpp->gpp_parms & G_PART_PARM_TYPE)
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return (pc98_parse_type(gpp->gpp_type, &entry->ent.dp_mid,
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&entry->ent.dp_sid));
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return (0);
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}
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static char *
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g_part_pc98_name(struct g_part_table *table, struct g_part_entry *baseentry,
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char *buf, size_t bufsz)
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{
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snprintf(buf, bufsz, "s%d", baseentry->gpe_index);
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return (buf);
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}
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static int
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g_part_pc98_probe(struct g_part_table *table, struct g_consumer *cp)
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{
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struct g_provider *pp;
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u_char *buf, *p;
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int error, index, res, sum;
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uint16_t magic;
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pp = cp->provider;
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/* Sanity-check the provider. */
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if (pp->sectorsize < SECSIZE || pp->mediasize < 2 * SECSIZE)
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return (ENOSPC);
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if (pp->sectorsize > SECSIZE)
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return (ENXIO);
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/* Check that there's a PC98 partition table. */
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buf = g_read_data(cp, 0L, 2 * SECSIZE, &error);
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if (buf == NULL)
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return (error);
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/* We goto out on mismatch. */
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res = ENXIO;
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magic = le16dec(buf + DOSMAGICOFFSET);
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if (magic != DOSMAGIC)
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goto out;
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sum = 0;
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for (index = SECSIZE; index < 2 * SECSIZE; index++)
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sum += buf[index];
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if (sum == 0) {
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res = G_PART_PROBE_PRI_LOW;
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goto out;
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}
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for (index = 0; index < NDOSPART; index++) {
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p = buf + SECSIZE + index * DOSPARTSIZE;
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if (p[2] != 0 || p[3] != 0)
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goto out;
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if (p[1] == 0)
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continue;
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if (le16dec(p + 10) == 0)
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goto out;
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}
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res = G_PART_PROBE_PRI_HIGH;
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out:
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g_free(buf);
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return (res);
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}
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static int
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g_part_pc98_read(struct g_part_table *basetable, struct g_consumer *cp)
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{
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struct pc98_partition ent;
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struct g_provider *pp;
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struct g_part_pc98_table *table;
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struct g_part_pc98_entry *entry;
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u_char *buf, *p;
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off_t msize;
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off_t start, end;
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u_int cyl;
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int error, index;
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pp = cp->provider;
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table = (struct g_part_pc98_table *)basetable;
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msize = pp->mediasize / SECSIZE;
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buf = g_read_data(cp, 0L, 2 * SECSIZE, &error);
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if (buf == NULL)
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return (error);
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cyl = basetable->gpt_heads * basetable->gpt_sectors;
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bcopy(buf, table->boot, sizeof(table->boot));
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bcopy(buf + SECSIZE, table->table, sizeof(table->table));
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for (index = NDOSPART - 1; index >= 0; index--) {
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p = buf + SECSIZE + index * DOSPARTSIZE;
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ent.dp_mid = p[0];
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ent.dp_sid = p[1];
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ent.dp_dum1 = p[2];
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ent.dp_dum2 = p[3];
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ent.dp_ipl_sct = p[4];
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ent.dp_ipl_head = p[5];
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ent.dp_ipl_cyl = le16dec(p + 6);
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ent.dp_ssect = p[8];
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ent.dp_shd = p[9];
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ent.dp_scyl = le16dec(p + 10);
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ent.dp_esect = p[12];
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ent.dp_ehd = p[13];
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ent.dp_ecyl = le16dec(p + 14);
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bcopy(p + 16, ent.dp_name, sizeof(ent.dp_name));
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if (ent.dp_sid == 0)
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continue;
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start = ent.dp_scyl * cyl;
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end = (ent.dp_ecyl + 1) * cyl - 1;
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entry = (struct g_part_pc98_entry *)g_part_new_entry(basetable,
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index + 1, start, end);
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entry->ent = ent;
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}
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basetable->gpt_entries = NDOSPART;
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basetable->gpt_first = cyl;
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basetable->gpt_last = msize - (msize % cyl) - 1;
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return (0);
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}
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static const char *
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g_part_pc98_type(struct g_part_table *basetable, struct g_part_entry *baseentry,
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char *buf, size_t bufsz)
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{
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struct g_part_pc98_entry *entry;
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u_int type;
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entry = (struct g_part_pc98_entry *)baseentry;
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type = entry->ent.dp_mid + (entry->ent.dp_sid << 8);
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if (type == DOSPTYP_386BSD)
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return (g_part_alias_name(G_PART_ALIAS_FREEBSD));
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snprintf(buf, bufsz, "!%d", type);
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return (buf);
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}
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static int
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g_part_pc98_write(struct g_part_table *basetable, struct g_consumer *cp)
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{
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struct g_part_entry *baseentry;
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struct g_part_pc98_entry *entry;
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struct g_part_pc98_table *table;
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u_char *p;
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int error, index;
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table = (struct g_part_pc98_table *)basetable;
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baseentry = LIST_FIRST(&basetable->gpt_entry);
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for (index = 1; index <= basetable->gpt_entries; index++) {
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p = table->table + (index - 1) * DOSPARTSIZE;
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entry = (baseentry != NULL && index == baseentry->gpe_index)
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? (struct g_part_pc98_entry *)baseentry : NULL;
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if (entry != NULL && !baseentry->gpe_deleted) {
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p[0] = entry->ent.dp_mid;
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p[1] = entry->ent.dp_sid;
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p[2] = entry->ent.dp_dum1;
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p[3] = entry->ent.dp_dum2;
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p[4] = entry->ent.dp_ipl_sct;
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p[5] = entry->ent.dp_ipl_head;
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le16enc(p + 6, entry->ent.dp_ipl_cyl);
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p[8] = entry->ent.dp_ssect;
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p[9] = entry->ent.dp_shd;
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le16enc(p + 10, entry->ent.dp_scyl);
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p[12] = entry->ent.dp_esect;
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p[13] = entry->ent.dp_ehd;
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le16enc(p + 14, entry->ent.dp_ecyl);
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bcopy(entry->ent.dp_name, p + 16,
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sizeof(entry->ent.dp_name));
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} else
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bzero(p, DOSPARTSIZE);
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if (entry != NULL)
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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);
|
|
return (error);
|
|
}
|