support for mount by label (not yet tested)

Also adds findfs applet. Closes bug 1143.

1 files changed, 105 insertions, 0 deletions

diff --git a/util-linux/volume_id/reiserfs.c b/util-linux/volume_id/reiserfs.c
new file mode 100644
index 0000000..98ecec2
--- /dev/null
+++ b/util-linux/volume_id/reiserfs.c
@@ -0,0 +1,105 @@
+/*
+ * volume_id - reads filesystem label and uuid
+ *
+ * Copyright (C) 2004 Kay Sievers <kay.sievers@vrfy.org>
+ * Copyright (C) 2005 Tobias Klauser <tklauser@access.unizh.ch>
+ *
+ *	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 reiserfs_super_block {
+	uint32_t	blocks_count;
+	uint32_t	free_blocks;
+	uint32_t	root_block;
+	uint32_t	journal_block;
+	uint32_t	journal_dev;
+	uint32_t	orig_journal_size;
+	uint32_t	dummy2[5];
+	uint16_t	blocksize;
+	uint16_t	dummy3[3];
+	uint8_t		magic[12];
+	uint32_t	dummy4[5];
+	uint8_t		uuid[16];
+	uint8_t		label[16];
+} __attribute__((__packed__));
+
+struct reiser4_super_block {
+	uint8_t		magic[16];
+	uint16_t	dummy[2];
+	uint8_t		uuid[16];
+	uint8_t		label[16];
+	uint64_t	dummy2;
+} __attribute__((__packed__));
+
+#define REISERFS1_SUPERBLOCK_OFFSET		0x2000
+#define REISERFS_SUPERBLOCK_OFFSET		0x10000
+
+int volume_id_probe_reiserfs(struct volume_id *id, uint64_t off)
+{
+	struct reiserfs_super_block *rs;
+	struct reiser4_super_block *rs4;
+
+	dbg("probing at offset 0x%llx", (unsigned long long) off);
+
+	rs = volume_id_get_buffer(id, off + REISERFS_SUPERBLOCK_OFFSET, 0x200);
+	if (rs == NULL)
+		return -1;
+
+	if (memcmp(rs->magic, "ReIsErFs", 8) == 0) {
+		strcpy(id->type_version, "3.5");
+		goto found;
+	}
+	if (memcmp(rs->magic, "ReIsEr2Fs", 9) == 0) {
+		strcpy(id->type_version, "3.6");
+		goto found_label;
+	}
+	if (memcmp(rs->magic, "ReIsEr3Fs", 9) == 0) {
+		strcpy(id->type_version, "JR");
+		goto found_label;
+	}
+
+	rs4 = (struct reiser4_super_block *) rs;
+	if (memcmp(rs4->magic, "ReIsEr4", 7) == 0) {
+		strcpy(id->type_version, "4");
+		volume_id_set_label_raw(id, rs4->label, 16);
+		volume_id_set_label_string(id, rs4->label, 16);
+		volume_id_set_uuid(id, rs4->uuid, UUID_DCE);
+		goto found;
+	}
+
+	rs = volume_id_get_buffer(id, off + REISERFS1_SUPERBLOCK_OFFSET, 0x200);
+	if (rs == NULL)
+		return -1;
+
+	if (memcmp(rs->magic, "ReIsErFs", 8) == 0) {
+		strcpy(id->type_version, "3.5");
+		goto found;
+	}
+
+	return -1;
+
+ found_label:
+	volume_id_set_label_raw(id, rs->label, 16);
+	volume_id_set_label_string(id, rs->label, 16);
+	volume_id_set_uuid(id, rs->uuid, UUID_DCE);
+
+ found:
+	volume_id_set_usage(id, VOLUME_ID_FILESYSTEM);
+	id->type = "reiserfs";
+
+	return 0;
+}