1 files changed, 71 insertions, 0 deletions

diff --git a/libblkid/src/superblocks/jfs.c b/libblkid/src/superblocks/jfs.c
new file mode 100644
index 000000000..ac684d8cd
--- /dev/null
+++ b/libblkid/src/superblocks/jfs.c
@@ -0,0 +1,71 @@
+/*
+ * Copyright (C) 1999 by Andries Brouwer
+ * Copyright (C) 1999, 2000, 2003 by Theodore Ts'o
+ * Copyright (C) 2001 by Andreas Dilger
+ * Copyright (C) 2004 Kay Sievers <kay.sievers@vrfy.org>
+ * Copyright (C) 2008 Karel Zak <kzak@redhat.com>
+ *
+ * This file may be redistributed under the terms of the
+ * GNU Lesser General Public License.
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+#include <ctype.h>
+#include <stdint.h>
+
+#include "superblocks.h"
+
+struct jfs_super_block {
+	unsigned char	js_magic[4];
+	uint32_t	js_version;
+	uint64_t	js_size;
+	uint32_t	js_bsize;	/* 4: aggregate block size in bytes */
+	uint16_t	js_l2bsize;	/* 2: log2 of s_bsize */
+	uint16_t	js_l2bfactor;	/* 2: log2(s_bsize/hardware block size) */
+	uint32_t	js_pbsize;	/* 4: hardware/LVM block size in bytes */
+	uint16_t	js_l2pbsize;	/* 2: log2 of s_pbsize */
+	uint16_t	js_pad;		/* 2: padding necessary for alignment */
+	uint32_t	js_dummy2[26];
+	unsigned char	js_uuid[16];
+	unsigned char	js_label[16];
+	unsigned char	js_loguuid[16];
+};
+
+static int probe_jfs(blkid_probe pr, const struct blkid_idmag *mag)
+{
+	struct jfs_super_block *js;
+
+	js = blkid_probe_get_sb(pr, mag, struct jfs_super_block);
+	if (!js)
+		return errno ? -errno : 1;
+	if (le32_to_cpu(js->js_bsize) != (1U << le16_to_cpu(js->js_l2bsize)))
+		return 1;
+	if (le32_to_cpu(js->js_pbsize) != (1U << le16_to_cpu(js->js_l2pbsize)))
+		return 1;
+	if ((le16_to_cpu(js->js_l2bsize) - le16_to_cpu(js->js_l2pbsize)) !=
+	    le16_to_cpu(js->js_l2bfactor))
+		return 1;
+
+	if (strlen((char *) js->js_label))
+		blkid_probe_set_label(pr, js->js_label, sizeof(js->js_label));
+	blkid_probe_set_uuid(pr, js->js_uuid);
+	return 0;
+}
+
+
+const struct blkid_idinfo jfs_idinfo =
+{
+	.name		= "jfs",
+	.usage		= BLKID_USAGE_FILESYSTEM,
+	.probefunc	= probe_jfs,
+	.minsz		= 16 * 1024 * 1024,
+	.magics		=
+	{
+		{ .magic = "JFS1", .len = 4, .kboff = 32 },
+		{ NULL }
+	}
+};
+