Teach GEOM about Sun disklabel formats.

The detection code in this method is written so that it should work on
all architectures which means that you can plug a Sun disk into a i386
now and access the partitions.

We still need an endian-agnostic ufs/ffs before this is really
interresting, but the main focus was to get sparc64 onto the GEOM
trail.

1 files changed, 209 insertions, 0 deletions

diff --git a/sys/geom/geom_sunlabel.c b/sys/geom/geom_sunlabel.c
new file mode 100644
index 0000000..9cba1b7
--- /dev/null
+++ b/sys/geom/geom_sunlabel.c
@@ -0,0 +1,209 @@
+/*-
+ * 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 BSD_METHOD_NAME "SUNLABEL-method"
+
+static u_int
+g_u16be(u_char *p)
+{
+	return ((p[0] << 8) | p[1]);
+}
+
+static u_int
+g_u32be(u_char *p)
+{
+	return ((p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3]);
+}
+
+
+struct g_sunlabel_softc {
+	int foo;
+};
+
+static int
+g_sunlabel_start(struct bio *bp)
+{
+	struct g_geom *gp;
+	struct g_sunlabel_softc *ms;
+	struct g_slicer *gsp;
+
+	gp = bp->bio_to->geom;
+	gsp = gp->softc;
+	ms = gsp->softc;
+	return (0);
+}
+
+static void
+g_sunlabel_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_sunlabel_taste(struct g_method *mp, struct g_provider *pp, struct thread *tp, int flags)
+{
+	struct g_geom *gp;
+	struct g_consumer *cp;
+	struct g_provider *pp2;
+	int error, i, j, npart;
+	u_char *buf;
+	struct g_sunlabel_softc *ms;
+	u_int secsize, u, v, csize;
+	off_t mediasize;
+
+	g_trace(G_T_TOPOLOGY, "g_sunlabel_taste(%s,%s)", mp->name, pp->name);
+	g_topology_assert();
+	if (flags == G_TF_NORMAL &&
+	    !strcmp(pp->geom->method->name, BSD_METHOD_NAME))
+		return (NULL);
+	gp = g_slice_new(mp, 8, pp, &cp, &ms, sizeof *ms, g_sunlabel_start);
+	if (gp == NULL)
+		return (NULL);
+	g_topology_unlock();
+	gp->dumpconf = g_sunlabel_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, tp);
+		if (error) {
+			secsize = 512;
+			printf("g_sunlabel_taste: error %d Sectors are %d bytes\n",
+			    error, secsize);
+		}
+		j = sizeof mediasize;
+		error = g_io_getattr("GEOM::mediasize", cp, &j, &mediasize, tp);
+		if (error) {
+			mediasize = 0;
+			printf("g_error %d Mediasize is %lld bytes\n",
+			    error, (long long)mediasize);
+		}
+		buf = g_read_data(cp, 0, secsize, &error);
+		if (buf == NULL || error != 0)
+			break;
+
+		/* The second last short is a magic number */
+		if (g_u16be(buf + 508) != 0xdabe)
+			break;
+		/* The shortword parity of the entire thing must be even */
+		u = 0;
+		for (i = 0; i < 512; i += 2)
+			u ^= g_u16be(buf + i);
+		if (u != 0)
+			break;
+		if (bootverbose) {
+			g_hexdump(buf, 128);
+			for (i = 0; i < 8; i++) {
+				printf("part %d %u %u\n", i,
+				    g_u32be(buf + 444 + i * 8),
+				    g_u32be(buf + 448 + i * 8));
+			}
+			printf("v_version = %d\n", g_u32be(buf + 128));
+			printf("v_nparts = %d\n", g_u16be(buf + 140));
+			for (i = 0; i < 8; i++) {
+				printf("v_part[%d] = %d %d\n",
+				    i, g_u16be(buf + 142 + i * 4),
+				    g_u16be(buf + 144 + i * 4));
+			}
+			printf("v_sanity %x\n", g_u32be(buf + 186));
+			printf("v_version = %d\n", g_u32be(buf + 128));
+			printf("v_rpm %d\n", g_u16be(buf + 420));
+			printf("v_totalcyl %d\n", g_u16be(buf + 422));
+			printf("v_cyl %d\n", g_u16be(buf + 432));
+			printf("v_alt %d\n", g_u16be(buf + 434));
+			printf("v_head %d\n", g_u16be(buf + 436));
+			printf("v_sec %d\n", g_u16be(buf + 438));
+		}
+
+		csize = g_u16be(buf + 436) * g_u16be(buf + 438);
+
+		for (i = 0; i < 8; i++) {
+			v = g_u32be(buf + 444 + i * 8);
+			u = g_u32be(buf + 448 + i * 8);
+			if (u == 0)
+				continue;
+			npart++;
+			pp2 = g_slice_addslice(gp, i,
+			    ((off_t)v * csize) << 9ULL,
+			    ((off_t)u) << 9ULL,
+			    "%s%c", pp->name, 'a' + 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_method g_sunlabel_method = {
+	BSD_METHOD_NAME,
+	g_sunlabel_taste,
+	g_slice_access,
+	g_slice_orphan,
+	NULL,
+	G_METHOD_INITSTUFF
+};
+
+DECLARE_GEOM_METHOD(g_sunlabel_method, g_sunlabel);