geom_pc98.c revision 93354 
1/*-
2 * Copyright (c) 2002 Poul-Henning Kamp
3 * Copyright (c) 2002 Networks Associates Technology, Inc.
4 * All rights reserved.
5 *
6 * This software was developed for the FreeBSD Project by Poul-Henning Kamp
7 * and NAI Labs, the Security Research Division of Network Associates, Inc.
8 * under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the
9 * DARPA CHATS research program.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 *    notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 *    notice, this list of conditions and the following disclaimer in the
18 *    documentation and/or other materials provided with the distribution.
19 * 3. The names of the authors may not be used to endorse or promote
20 *    products derived from this software without specific prior written
21 *    permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 *
35 * $FreeBSD: head/sys/geom/geom_pc98.c 93354 2002-03-28 21:38:38Z phk $
36 */
37
38
39#include <sys/param.h>
40#ifndef _KERNEL
41#include <stdio.h>
42#include <string.h>
43#include <stdlib.h>
44#include <signal.h>
45#include <err.h>
46#else
47#include <sys/systm.h>
48#include <sys/kernel.h>
49#include <sys/conf.h>
50#include <sys/bio.h>
51#include <sys/malloc.h>
52#include <sys/lock.h>
53#include <sys/mutex.h>
54#endif
55#include <sys/errno.h>
56#include <geom/geom.h>
57#include <geom/geom_slice.h>
58#include <machine/endian.h>
59
60#define PC98_CLASS_NAME "PC98-class"
61
62struct g_pc98_softc {
63	int foo;
64};
65
66static int
67g_pc98_start(struct bio *bp)
68{
69	struct g_geom *gp;
70	struct g_pc98_softc *ms;
71	struct g_slicer *gsp;
72
73	gp = bp->bio_to->geom;
74	gsp = gp->softc;
75	ms = gsp->softc;
76	return (0);
77}
78
79static void
80g_pc98_dumpconf(struct sbuf *sb, char *indent, struct g_geom *gp, struct g_consumer *cp __unused, struct g_provider *pp)
81{
82
83	g_slice_dumpconf(sb, indent, gp, cp, pp);
84}
85
86static struct g_geom *
87g_pc98_taste(struct g_class *mp, struct g_provider *pp, int flags)
88{
89	struct g_geom *gp;
90	struct g_consumer *cp;
91	struct g_provider *pp2;
92	int error, i, j, npart;
93	u_char *buf;
94	struct g_pc98_softc *ms;
95	u_int secsize, u, v;
96	u_int fwsect, fwhead;
97	off_t mediasize, start, length;
98
99	g_trace(G_T_TOPOLOGY, "g_pc98_taste(%s,%s)", mp->name, pp->name);
100	g_topology_assert();
101	if (flags == G_TF_NORMAL &&
102	    !strcmp(pp->geom->class->name, PC98_CLASS_NAME))
103		return (NULL);
104	gp = g_slice_new(mp, 8, pp, &cp, &ms, sizeof *ms, g_pc98_start);
105	if (gp == NULL)
106		return (NULL);
107	g_topology_unlock();
108	gp->dumpconf = g_pc98_dumpconf;
109	npart = 0;
110	while (1) {	/* a trick to allow us to use break */
111		if (gp->rank != 2 && flags == G_TF_NORMAL)
112			break;
113		j = sizeof secsize;
114		error = g_io_getattr("GEOM::sectorsize", cp, &j, &secsize);
115		if (error) {
116			secsize = 512;
117			printf("g_pc98_taste: error %d Sectors are %d bytes\n",
118			    error, secsize);
119		}
120		j = sizeof mediasize;
121		error = g_io_getattr("GEOM::mediasize", cp, &j, &mediasize);
122		if (error) {
123			mediasize = 0;
124			printf("g_error %d Mediasize is %lld bytes\n",
125			    error, (long long)mediasize);
126		}
127		j = sizeof fwsect;
128		error = g_io_getattr("GEOM::fwsectors", cp, &j, &fwsect);
129		if (error || fwsect == 0) {
130			fwsect = 17;
131			printf("g_pc98_taste: error %d guessing %d sectors\n",
132			    error, fwsect);
133		}
134		j = sizeof fwhead;
135		error = g_io_getattr("GEOM::fwheads", cp, &j, &fwhead);
136		if (error || fwhead == 0) {
137			fwhead = 8;
138			printf("g_pc98_taste: error %d guessing %d heads\n",
139			    error, fwhead);
140		}
141		buf = g_read_data(cp, 0,
142		    secsize < 1024 ? 1024 : secsize, &error);
143		if (buf == NULL || error != 0)
144			break;
145
146		if (buf[0x1fe] != 0x55 || buf[0x1ff] != 0xaa)
147			break;
148		if (buf[4] != 'I' || buf[5] != 'P' ||
149		    buf[6] != 'L' || buf[7] != '1')
150			break;
151
152
153		for (i = 0; i < 16; i++) {
154			v = g_dec_le2(buf + 512 + 10 + i * 32);
155			u = g_dec_le2(buf + 512 + 14 + i * 32);
156			if (u == 0)
157				continue;
158			printf("Index: %d\n", i);
159			g_hexdump(buf+512 + i * 32, 32);
160			start = v * fwsect * fwhead * secsize;
161			length = (u - v) * fwsect * fwhead * secsize;
162			printf("c%d - c%d (%llx - %llx) = %s\n",
163			     v, u, start, length, buf + 512 + 16 + i * 32);
164			npart++;
165			pp2 = g_slice_addslice(gp, i,
166			    start, length,
167			    "%ss%d", pp->name, 1 + i);
168			g_error_provider(pp2, 0);
169		}
170		break;
171	}
172	g_topology_lock();
173	error = g_access_rel(cp, -1, 0, 0);
174	if (npart > 0)
175		return (gp);
176	g_std_spoiled(cp);
177	return (NULL);
178}
179
180static struct g_class g_pc98_class = {
181	PC98_CLASS_NAME,
182	g_pc98_taste,
183	g_slice_access,
184	g_slice_orphan,
185	NULL,
186	G_CLASS_INITSTUFF
187};
188
189DECLARE_GEOM_CLASS(g_pc98_class, g_pc98);
190