freebsd-dev/sys/geom/geom_pc98.c

265 lines
7.1 KiB
C

/*-
* Copyright (c) 2002 Poul-Henning Kamp
* Copyright (c) 2002 Networks Associates Technology, Inc.
* All rights reserved.
*
* This software was developed for the FreeBSD Project by Poul-Henning Kamp
* and NAI Labs, the Security Research Division of Network Associates, Inc.
* under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the
* DARPA CHATS research program.
*
* 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 AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
*
* $FreeBSD$
*/
#include <sys/param.h>
#ifndef _KERNEL
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <err.h>
#else
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/bio.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#endif
#include <sys/diskpc98.h>
#include <geom/geom.h>
#include <geom/geom_slice.h>
#define PC98_CLASS_NAME "PC98"
static void
g_dec_dos_partition(u_char *ptr, struct dos_partition *d)
{
int i;
d->dp_mid = ptr[0];
d->dp_sid = ptr[1];
d->dp_dum1 = ptr[2];
d->dp_dum2 = ptr[3];
d->dp_ipl_sct = ptr[4];
d->dp_ipl_head = ptr[5];
d->dp_ipl_cyl = g_dec_le2(ptr + 6);
d->dp_ssect = ptr[8];
d->dp_shd = ptr[9];
d->dp_scyl = g_dec_le2(ptr + 10);
d->dp_esect = ptr[12];
d->dp_ehd = ptr[13];
d->dp_ecyl = g_dec_le2(ptr + 14);
for (i = 0; i < sizeof(d->dp_name); i++)
d->dp_name[i] = ptr[16 + i];
}
struct g_pc98_softc {
int type [NDOSPART];
struct dos_partition dp[NDOSPART];
};
static int
g_pc98_start(struct bio *bp)
{
struct g_provider *pp;
struct g_geom *gp;
struct g_pc98_softc *mp;
struct g_slicer *gsp;
int index;
pp = bp->bio_to;
index = pp->index;
gp = pp->geom;
gsp = gp->softc;
mp = gsp->softc;
if (bp->bio_cmd == BIO_GETATTR) {
if (g_handleattr_int(bp, "PC98::type", mp->type[index]))
return (1);
if (g_handleattr_off_t(bp, "PC98::offset",
gsp->slices[index].offset))
return (1);
}
return (0);
}
static void
g_pc98_dumpconf(struct sbuf *sb, char *indent, struct g_geom *gp,
struct g_consumer *cp __unused, struct g_provider *pp)
{
struct g_pc98_softc *mp;
struct g_slicer *gsp;
char sname[17];
gsp = gp->softc;
mp = gsp->softc;
g_slice_dumpconf(sb, indent, gp, cp, pp);
if (pp != NULL) {
strncpy(sname, mp->dp[pp->index].dp_name, 16);
sname[16] = '\0';
if (indent == NULL) {
sbuf_printf(sb, " ty %d", mp->type[pp->index]);
sbuf_printf(sb, " sn %s", sname);
} else {
sbuf_printf(sb, "%s<type>%d</type>\n", indent,
mp->type[pp->index]);
sbuf_printf(sb, "%s<sname>%s</sname>\n", indent,
sname);
}
}
}
static void
g_pc98_print(int i, struct dos_partition *dp)
{
char sname[17];
strncpy(sname, dp->dp_name, 16);
sname[16] = '\0';
g_hexdump(dp, sizeof(dp[0]));
printf("[%d] mid:%d(0x%x) sid:%d(0x%x)",
i, dp->dp_mid, dp->dp_mid, dp->dp_sid, dp->dp_sid);
printf(" s:%d/%d/%d", dp->dp_scyl, dp->dp_shd, dp->dp_ssect);
printf(" e:%d/%d/%d", dp->dp_ecyl, dp->dp_ehd, dp->dp_esect);
printf(" sname:%s\n", sname);
}
static struct g_geom *
g_pc98_taste(struct g_class *mp, struct g_provider *pp, int flags)
{
struct g_geom *gp;
struct g_consumer *cp;
struct g_provider *pp2;
int error, i, npart;
struct g_pc98_softc *ms;
struct g_slicer *gsp;
u_int fwsectors, fwheads, sectorsize;
u_char *buf;
off_t spercyl;
g_trace(G_T_TOPOLOGY, "g_pc98_taste(%s,%s)", mp->name, pp->name);
g_topology_assert();
if (flags == G_TF_NORMAL &&
!strcmp(pp->geom->class->name, PC98_CLASS_NAME))
return (NULL);
gp = g_slice_new(mp, NDOSPART, pp, &cp, &ms, sizeof *ms, g_pc98_start);
if (gp == NULL)
return (NULL);
gsp = gp->softc;
g_topology_unlock();
gp->dumpconf = g_pc98_dumpconf;
npart = 0;
while (1) { /* a trick to allow us to use break */
if (gp->rank != 2 && flags == G_TF_NORMAL)
break;
error = g_getattr("GEOM::fwsectors", cp, &fwsectors);
if (error || fwsectors == 0) {
fwsectors = 17;
printf("g_pc98_taste: error %d guessing %d sectors\n",
error, fwsectors);
}
error = g_getattr("GEOM::fwheads", cp, &fwheads);
if (error || fwheads == 0) {
fwheads = 8;
printf("g_pc98_taste: error %d guessing %d heads\n",
error, fwheads);
}
sectorsize = cp->provider->sectorsize;
if (sectorsize < 512)
break;
gsp->frontstuff = sectorsize * fwsectors;
spercyl = (off_t)fwsectors * fwheads * sectorsize;
buf = g_read_data(cp, 0,
sectorsize < 1024 ? 1024 : sectorsize, &error);
if (buf == NULL || error != 0)
break;
if (buf[0x1fe] != 0x55 || buf[0x1ff] != 0xaa) {
g_free(buf);
break;
}
#if 0
/*
* XXX: Some sources indicate this is a magic sequence, but appearantly
* XXX: it is not universal. Documentation would be wonderfule to have.
*/
if (buf[4] != 'I' || buf[5] != 'P' ||
buf[6] != 'L' || buf[7] != '1') {
g_free(buf);
break;
}
#endif
for (i = 0; i < NDOSPART; i++)
g_dec_dos_partition(
buf + 512 + i * sizeof(struct dos_partition),
ms->dp + i);
g_free(buf);
for (i = 0; i < NDOSPART; i++) {
/* If start and end are identical it's bogus */
if (ms->dp[i].dp_ssect == ms->dp[i].dp_esect &&
ms->dp[i].dp_shd == ms->dp[i].dp_ehd &&
ms->dp[i].dp_scyl == ms->dp[i].dp_ecyl)
continue;
if (ms->dp[i].dp_ecyl == 0)
continue;
if (bootverbose) {
printf("PC98 Slice %d on %s:\n",
i + 1, gp->name);
g_pc98_print(i, ms->dp + i);
}
npart++;
ms->type[i] = (ms->dp[i].dp_sid << 8) |
ms->dp[i].dp_mid;
g_topology_lock();
pp2 = g_slice_addslice(gp, i,
ms->dp[i].dp_scyl * spercyl,
(ms->dp[i].dp_ecyl - ms->dp[i].dp_scyl + 1) *
spercyl,
sectorsize,
"%ss%d", gp->name, i + 1);
g_topology_unlock();
}
break;
}
g_topology_lock();
error = g_access_rel(cp, -1, 0, 0);
if (npart > 0) {
LIST_FOREACH(pp, &gp->provider, provider)
g_error_provider(pp, 0);
return (gp);
}
g_std_spoiled(cp);
return (NULL);
}
static struct g_class g_pc98_class = {
PC98_CLASS_NAME,
g_pc98_taste,
NULL,
G_CLASS_INITIALIZER
};
DECLARE_GEOM_CLASS(g_pc98_class, g_pc98);