1 files changed, 65 insertions, 0 deletions
diff --git a/extras/volume_id/lib/jfs.c b/extras/volume_id/lib/jfs.c
new file mode 100644
index 0000000000..b230fb258c
--- /dev/null
+++ b/extras/volume_id/lib/jfs.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 jfs_super_block {
+	uint8_t		magic[4];
+	uint32_t	version;
+	uint64_t	size;
+	uint32_t	bsize;
+	uint32_t	dummy1;
+	uint32_t	pbsize;
+	uint32_t	dummy2[27];
+	uint8_t		uuid[16];
+	uint8_t		label[16];
+	uint8_t		loguuid[16];
+} PACKED;
+
+#define JFS_SUPERBLOCK_OFFSET			0x8000
+
+int volume_id_probe_jfs(struct volume_id *id, uint64_t off)
+{
+	struct jfs_super_block *js;
+
+	dbg("probing at offset 0x%llx", (unsigned long long) 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;
+}