1 files changed, 59 insertions, 0 deletions
diff --git a/util-linux/volume_id/jfs.c b/util-linux/volume_id/jfs.c
new file mode 100644
index 000000000..28b4eb694
--- /dev/null
+++ b/util-linux/volume_id/jfs.c
@@ -0,0 +1,59 @@
+/*
+ * 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
+ */
+
+#include "volume_id_internal.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];
+} __attribute__((__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 = 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;
+}