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/*-
* 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.
* 3. The names of the authors may not be used to endorse or promote
* products derived from this software without specific prior written
* permission.
*
* 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 <stdio.h>
#include <string.h>
#include <signal.h>
#include <sys/param.h>
#include <stdlib.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/errno.h>
#include <sys/disklabel.h>
#include <sys/sbuf.h>
#include <geom/geom.h>
#include <geom/geom_slice.h>
#define MBR_METHOD_NAME "MBR-method"
struct g_mbr_softc {
int type [NDOSPART];
struct dos_partition dospart[NDOSPART];
};
static int
g_mbr_start(struct bio *bp)
{
struct g_provider *pp;
struct g_geom *gp;
struct g_mbr_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_haveattr_int(bp, "MBR::type", mp->type[index]))
return (1);
}
return (0);
}
static void
g_mbr_dumpconf(struct sbuf *sb, char *indent, struct g_geom *gp, struct g_consumer *cp __unused, struct g_provider *pp)
{
struct g_mbr_softc *mp;
struct g_slicer *gsp;
g_slice_dumpconf(sb, indent, gp, cp, pp);
gsp = gp->softc;
mp = gsp->softc;
if (pp != NULL) {
sbuf_printf(sb, "%s<type>%d</type>\n",
indent, mp->type[pp->index]);
}
}
static struct dos_partition historical_bogus_partition_table[NDOSPART] = {
{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, },
{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, },
{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, },
{ 0x80, 0, 1, 0, DOSPTYP_386BSD, 255, 255, 255, 0, 50000, },
};
static struct dos_partition historical_bogus_partition_table_fixed[NDOSPART] = {
{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, },
{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, },
{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, },
{ 0x80, 0, 1, 0, DOSPTYP_386BSD, 254, 255, 255, 0, 50000, },
};
static void
g_mbr_print(int i __unused, struct dos_partition *dp __unused)
{
#if 0
g_hexdump(dp, sizeof(dp[0]));
printf("[%d] f:%02x typ:%d", i, dp->dp_flag, dp->dp_typ);
printf(" s(CHS):%d/%d/%d", dp->dp_scyl, dp->dp_shd, dp->dp_ssect);
printf(" e(CHS):%d/%d/%d", dp->dp_ecyl, dp->dp_ehd, dp->dp_esect);
printf(" s:%d l:%d\n", dp->dp_start, dp->dp_size);
#endif
}
static struct g_geom *
g_mbr_taste(struct g_method *mp, struct g_provider *pp, struct thread *tp, int insist)
{
struct g_geom *gp;
struct g_consumer *cp;
struct g_provider *pp2;
int error, i, j, npart;
struct dos_partition dp[NDOSPART];
struct g_mbr_softc *ms;
u_char *buf;
g_trace(G_T_TOPOLOGY, "mbr_taste(%s,%s)", mp->name, pp->name);
g_topology_assert();
gp = g_slice_new(mp, NDOSPART, pp, &cp, &ms, sizeof *ms, g_mbr_start);
if (gp == NULL)
return (NULL);
g_topology_unlock();
gp->dumpconf = g_mbr_dumpconf;
npart = 0;
while (1) { /* a trick to allow us to use break */
if (gp->rank != 2 && insist == 0)
break;
j = sizeof i;
/* For now we only support 512 bytes sectors */
error = g_io_getattr("GEOM::sectorsize", cp, &j, &i, tp);
if (!error && i != 512)
break;
buf = g_read_data(cp, 0, 512, &error);
if (buf == NULL || error != 0)
break;
if (buf[0x1fe] != 0x55 && buf[0x1ff] != 0xaa) {
g_free(buf);
break;
}
bcopy(buf + DOSPARTOFF, dp, sizeof(dp));
g_free(buf);
if (bcmp(dp, historical_bogus_partition_table,
sizeof historical_bogus_partition_table) == 0)
break;
if (bcmp(dp, historical_bogus_partition_table_fixed,
sizeof historical_bogus_partition_table_fixed) == 0)
break;
npart = 0;
for (i = 0; i < NDOSPART; i++) {
if (dp[i].dp_flag != 0 && dp[i].dp_flag != 0x80)
continue;
if (dp[i].dp_size == 0)
continue;
g_mbr_print(i, dp + i);
npart++;
ms->type[i] = dp[i].dp_typ;
pp2 = g_slice_addslice(gp, i,
((off_t)dp[i].dp_start) << 9ULL,
((off_t)dp[i].dp_size) << 9ULL,
"%ss%d", gp->name, i + 1);
}
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_method g_mbr_method = {
MBR_METHOD_NAME,
g_mbr_taste,
g_slice_access,
g_slice_orphan,
NULL,
G_METHOD_INITSTUFF
};
DECLARE_GEOM_METHOD(g_mbr_method, g_mbr);
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