Add preliminary PC98 class to GEOM.

I have not been able to find very much information about the PC98
extended partition layout so this is gleaned from the source in
our pc98 architecture.  Corrections and patched very welcome.

Sponsored by: DARPA and NAI Labs.

1 files changed, 189 insertions, 0 deletions

diff --git a/sys/geom/geom_pc98.c b/sys/geom/geom_pc98.c
new file mode 100644
index 0000000..ce7e9e4
--- /dev/null
+++ b/sys/geom/geom_pc98.c
@@ -0,0 +1,189 @@
+/*-
+ * 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 <stdlib.h>
+#include <signal.h>
+#include <err.h>
+#else
+#include <sys/systm.h>
+#include <sys/kernel.h>
+#include <sys/conf.h>
+#include <sys/bio.h>
+#include <sys/malloc.h>
+#include <sys/lock.h>
+#include <sys/mutex.h>
+#endif
+#include <sys/errno.h>
+#include <geom/geom.h>
+#include <geom/geom_slice.h>
+#include <machine/endian.h>
+
+#define PC98_CLASS_NAME "PC98-class"
+
+struct g_pc98_softc {
+	int foo;
+};
+
+static int
+g_pc98_start(struct bio *bp)
+{
+	struct g_geom *gp;
+	struct g_pc98_softc *ms;
+	struct g_slicer *gsp;
+
+	gp = bp->bio_to->geom;
+	gsp = gp->softc;
+	ms = gsp->softc;
+	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)
+{
+
+	g_slice_dumpconf(sb, indent, gp, cp, pp);
+}
+
+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, j, npart;
+	u_char *buf;
+	struct g_pc98_softc *ms;
+	u_int secsize, u, v;
+	u_int fwsect, fwhead;
+	off_t mediasize, start, length;
+
+	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, 8, pp, &cp, &ms, sizeof *ms, g_pc98_start);
+	if (gp == NULL)
+		return (NULL);
+	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;
+		j = sizeof secsize;
+		error = g_io_getattr("GEOM::sectorsize", cp, &j, &secsize);
+		if (error) {
+			secsize = 512;
+			printf("g_pc98_taste: error %d Sectors are %d bytes\n",
+			    error, secsize);
+		}
+		j = sizeof mediasize;
+		error = g_io_getattr("GEOM::mediasize", cp, &j, &mediasize);
+		if (error) {
+			mediasize = 0;
+			printf("g_error %d Mediasize is %lld bytes\n",
+			    error, (long long)mediasize);
+		}
+		j = sizeof fwsect;
+		error = g_io_getattr("GEOM::fwsectors", cp, &j, &fwsect);
+		if (error || fwsect == 0) {
+			fwsect = 17;
+			printf("g_pc98_taste: error %d guessing %d sectors\n",
+			    error, fwsect);
+		}
+		j = sizeof fwhead;
+		error = g_io_getattr("GEOM::fwheads", cp, &j, &fwhead);
+		if (error || fwhead == 0) {
+			fwhead = 8;
+			printf("g_pc98_taste: error %d guessing %d heads\n",
+			    error, fwhead);
+		}
+		buf = g_read_data(cp, 0,
+		    secsize < 1024 ? 1024 : secsize, &error);
+		if (buf == NULL || error != 0)
+			break;
+
+		if (buf[0x1fe] != 0x55 || buf[0x1ff] != 0xaa)
+			break;
+		if (buf[4] != 'I' || buf[5] != 'P' ||
+		    buf[6] != 'L' || buf[7] != '1')
+			break;
+
+
+		for (i = 0; i < 16; i++) {
+			v = g_dec_le2(buf + 512 + 10 + i * 32);
+			u = g_dec_le2(buf + 512 + 14 + i * 32);
+			if (u == 0)
+				continue;
+			printf("Index: %d\n", i);
+			g_hexdump(buf+512 + i * 32, 32);
+			start = v * fwsect * fwhead * secsize;
+			length = (u - v) * fwsect * fwhead * secsize;
+			printf("c%d - c%d (%llx - %llx) = %s\n",
+			     v, u, start, length, buf + 512 + 16 + i * 32);
+			npart++;
+			pp2 = g_slice_addslice(gp, i,
+			    start, length,
+			    "%ss%d", pp->name, 1 + i);
+			g_error_provider(pp2, 0);
+		}
+		break;
+	}
+	g_topology_lock();
+	error = g_access_rel(cp, -1, 0, 0);
+	if (npart > 0)
+		return (gp);
+	g_std_spoiled(cp);
+	return (NULL);
+}
+
+static struct g_class g_pc98_class = {
+	PC98_CLASS_NAME,
+	g_pc98_taste,
+	g_slice_access,
+	g_slice_orphan,
+	NULL,
+	G_CLASS_INITSTUFF
+};
+
+DECLARE_GEOM_CLASS(g_pc98_class, g_pc98);