volume_id: support for oracleasm

extras/volume_id/README

@@ -41,6 +41,7 @@ ocfs (1, 2)            *      *      *     *
 vxfs                   *      -      -     *
 nss (netware)          *             *     *
 gfs, gfs2              *      *      -     -
+oracleasm              *      *      -     -
 
 Raid members are detected to prevent the probing for a filesystem
 -----------------------------------------------------------------

extras/volume_id/lib/Makefile

@@ -52,6 +52,7 @@ OBJS=				\
 	vxfs.o			\
 	squashfs.o		\
 	netware.o		\
+	oracleasm.o		\
 	volume_id.o		\
 	util.o
 

extras/volume_id/lib/libvolume_id.h

@@ -119,6 +119,7 @@ extern int volume_id_probe_linux_raid(struct volume_id *id, uint64_t off, uint64
 extern int volume_id_probe_lvm1(struct volume_id *id, uint64_t off, uint64_t size);
 extern int volume_id_probe_lvm2(struct volume_id *id, uint64_t off, uint64_t size);
 extern int volume_id_probe_ddf_raid(struct volume_id *id, uint64_t off, uint64_t size);
+extern int volume_id_probe_oracleasm(struct volume_id *id, uint64_t off, uint64_t size);
 
 /* bios raid */
 extern int volume_id_probe_intel_software_raid(struct volume_id *id, uint64_t off, uint64_t size);

extras/volume_id/lib/oracleasm.c

@@ -0,0 +1,65 @@
+/*
+ * volume_id - reads filesystem label and uuid
+ *
+ * Copyright (C) 2004 Kay Sievers <kay.sievers@vrfy.org>
+ *
+ *	This program is free software; you can redistribute it and/or modify it
+ *	under the terms of the GNU General Public License as published by the
+ *	Free Software Foundation version 2 of the License.
+ */
+
+#ifndef _GNU_SOURCE
+#define _GNU_SOURCE 1
+#endif
+
+#ifdef HAVE_CONFIG_H
+#  include <config.h>
+#endif
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+#include <ctype.h>
+
+#include "libvolume_id.h"
+#include "util.h"
+
+struct oracleasm_super_block {
+	uint8_t	tag[8];
+	uint8_t	id[24];
+} PACKED;
+
+#define ASM_SB_OFF			0x20
+#define ASM_MAGIC			"ORCLDISK"
+
+/*
+ * Detect Oracle Automatic Storage Management (ASM).
+ * It can do mirroring, but don't consider it RAID in the sense
+ * that an ext3 filesystem could live inside.  Thus, mark it 'other'.
+ * There also is a magic word 'ORCLCLRD'; like blkid(8), we ignore that.
+ */
+int volume_id_probe_oracleasm(struct volume_id *id, uint64_t off, uint64_t size)
+{
+	const uint8_t *buf;
+	struct oracleasm_super_block *oracleasm;
+
+	info("probing at offset 0x%llx\n", (unsigned long long) off);
+
+	buf = volume_id_get_buffer(id, off + ASM_SB_OFF, 0x800);
+	if (buf == NULL)
+		return -1;
+
+	oracleasm = (struct oracleasm_super_block *) buf;
+
+	if (memcmp(oracleasm->tag, ASM_MAGIC, 8) != 0)
+		return -1;
+
+	volume_id_set_usage(id, VOLUME_ID_OTHER);
+	volume_id_set_label_raw(id, oracleasm->id, 24);
+	volume_id_set_label_string(id, oracleasm->id, 24);
+	id->type = "oracleasm";
+
+	return 0;
+}

extras/volume_id/lib/volume_id.c

@@ -77,6 +77,7 @@ static const struct prober prober_filesystem[] = {
 	{ volume_id_probe_vxfs, { "vxfs", } },
 	{ volume_id_probe_squashfs, { "squashfs", } },
 	{ volume_id_probe_netware, { "netware", } },
+	{ volume_id_probe_oracleasm, { "oracleasm", } },
 };
 
 /* the user can overwrite this log function */