1 files changed, 78 insertions, 0 deletions
diff --git a/extras/volume_id/volume_id/jfs.c b/extras/volume_id/volume_id/jfs.c
new file mode 100644
index 0000000000..ac4eab502d
--- /dev/null
+++ b/extras/volume_id/volume_id/jfs.c
@@ -0,0 +1,78 @@
+/*
+ * volume_id - reads filesystem label and uuid
+ *
+ * Copyright (C) 2004 Kay Sievers <kay.sievers@vrfy.org>
+ *
+ *	This library is free software; you can redistribute it and/or
+ *	modify it under the terms of the GNU Lesser General Public
+ *	License as published by the Free Software Foundation; either
+ *	version 2.1 of the License, or (at your option) any later version.
+ *
+ *	This library is distributed in the hope that it will be useful,
+ *	but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ *	Lesser General Public License for more details.
+ *
+ *	You should have received a copy of the GNU Lesser General Public
+ *	License along with this library; if not, write to the Free Software
+ *	Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#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 <asm/types.h>
+
+#include "volume_id.h"
+#include "logging.h"
+#include "util.h"
+#include "jfs.h"
+
+struct jfs_super_block {
+	__u8	magic[4];
+	__u32	version;
+	__u64	size;
+	__u32	bsize;
+	__u32	dummy1;
+	__u32	pbsize;
+	__u32	dummy2[27];
+	__u8	uuid[16];
+	__u8	label[16];
+	__u8	loguuid[16];
+} __attribute__((__packed__));
+
+#define JFS_SUPERBLOCK_OFFSET			0x8000
+
+int volume_id_probe_jfs(struct volume_id *id, __u64 off)
+{
+	struct jfs_super_block *js;
+
+	dbg("probing at offset %llu", off);
+
+	js = (struct jfs_super_block *) volume_id_get_buffer(id, off + JFS_SUPERBLOCK_OFFSET, 0x200);
+	if (js == NULL)
+		return -1;
+
+	if (memcmp(js->magic, "JFS1", 4) != 0)
+		return -1;
+
+	volume_id_set_label_raw(id, js->label, 16);
+	volume_id_set_label_string(id, js->label, 16);
+	volume_id_set_uuid(id, js->uuid, UUID_DCE);
+
+	volume_id_set_usage(id, VOLUME_ID_FILESYSTEM);
+	id->type = "jfs";
+
+	return 0;
+}