1 files changed, 128 insertions, 0 deletions

diff --git a/libblkid/src/superblocks/reiserfs.c b/libblkid/src/superblocks/reiserfs.c
new file mode 100644
index 000000000..edbaaa946
--- /dev/null
+++ b/libblkid/src/superblocks/reiserfs.c
@@ -0,0 +1,128 @@
+/*
+ * Copyright (C) 1999, 2001 by Andries Brouwer
+ * Copyright (C) 1999, 2000, 2003 by Theodore Ts'o
+ * 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 <stdint.h>
+
+#include "superblocks.h"
+
+struct reiserfs_super_block {
+	uint32_t	rs_blocks_count;
+	uint32_t	rs_free_blocks;
+	uint32_t	rs_root_block;
+	uint32_t	rs_journal_block;
+	uint32_t	rs_journal_dev;
+	uint32_t	rs_orig_journal_size;
+	uint32_t	rs_dummy2[5];
+	uint16_t	rs_blocksize;
+	uint16_t	rs_dummy3[3];
+	unsigned char	rs_magic[12];
+	uint32_t	rs_dummy4[5];
+	unsigned char	rs_uuid[16];
+	char		rs_label[16];
+} __attribute__((packed));
+
+struct reiser4_super_block {
+	unsigned char	rs4_magic[16];
+	uint16_t	rs4_dummy[2];
+	unsigned char	rs4_uuid[16];
+	unsigned char	rs4_label[16];
+	uint64_t	rs4_dummy2;
+} __attribute__((packed));
+
+static int probe_reiser(blkid_probe pr, const struct blkid_idmag *mag)
+{
+	struct reiserfs_super_block *rs;
+	unsigned int blocksize;
+
+	rs = blkid_probe_get_sb(pr, mag, struct reiserfs_super_block);
+	if (!rs)
+		return errno ? -errno : 1;
+
+	blocksize = le16_to_cpu(rs->rs_blocksize);
+
+	/* The blocksize must be at least 512B */
+	if ((blocksize >> 9) == 0)
+		return 1;
+
+	/* If the superblock is inside the journal, we have the wrong one */
+	if (mag->kboff / (blocksize >> 9) > le32_to_cpu(rs->rs_journal_block) / 2)
+		return 1;
+
+	/* LABEL/UUID are only valid for later versions of Reiserfs v3.6. */
+	if (mag->magic[6] == '2' || mag->magic[6] == '3') {
+		if (*rs->rs_label)
+			blkid_probe_set_label(pr,
+					(unsigned char *) rs->rs_label,
+					sizeof(rs->rs_label));
+		blkid_probe_set_uuid(pr, rs->rs_uuid);
+	}
+
+	if (mag->magic[6] == '3')
+		blkid_probe_set_version(pr, "JR");
+	else if (mag->magic[6] == '2')
+		blkid_probe_set_version(pr, "3.6");
+	else
+		blkid_probe_set_version(pr, "3.5");
+
+	return 0;
+}
+
+static int probe_reiser4(blkid_probe pr, const struct blkid_idmag *mag)
+{
+	struct reiser4_super_block *rs4;
+
+	rs4 = blkid_probe_get_sb(pr, mag, struct reiser4_super_block);
+	if (!rs4)
+		return errno ? -errno : 1;
+
+	if (*rs4->rs4_label)
+		blkid_probe_set_label(pr, rs4->rs4_label, sizeof(rs4->rs4_label));
+	blkid_probe_set_uuid(pr, rs4->rs4_uuid);
+	blkid_probe_set_version(pr, "4");
+
+	return 0;
+}
+
+
+const struct blkid_idinfo reiser_idinfo =
+{
+	.name		= "reiserfs",
+	.usage		= BLKID_USAGE_FILESYSTEM,
+	.probefunc	= probe_reiser,
+	.minsz		= 128 * 1024,
+	.magics		=
+	{
+		{ .magic = "ReIsErFs",  .len = 8, .kboff = 8,  .sboff = 0x34 },
+		{ .magic = "ReIsEr2Fs", .len = 9, .kboff = 64, .sboff = 0x34 },
+		{ .magic = "ReIsEr3Fs", .len = 9, .kboff = 64, .sboff = 0x34 },
+		{ .magic = "ReIsErFs",  .len = 8, .kboff = 64, .sboff = 0x34 },
+		{ .magic = "ReIsErFs",  .len = 8, .kboff =  8, .sboff = 20   },
+		{ NULL }
+	}
+};
+
+const struct blkid_idinfo reiser4_idinfo =
+{
+	.name		= "reiser4",
+	.usage		= BLKID_USAGE_FILESYSTEM,
+	.probefunc	= probe_reiser4,
+	.minsz		= 128 * 1024,
+	.magics		=
+	{
+		{ .magic = "ReIsEr4", .len = 7, .kboff = 64 },
+		{ NULL }
+	}
+};
+
+
+
+