2 * volume_id - reads filesystem label and uuid
4 * Copyright (C) 2004 Andre Masella <andre@masella.no-ip.org>
5 * Copyright (C) 2005 Kay Sievers <kay.sievers@vrfy.org>
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation version 2 of the License.
27 #include "libvolume_id.h"
32 struct ocfs1_super_block_header {
33 uint32_t minor_version;
34 uint32_t major_version;
35 uint8_t signature[128];
36 uint8_t mount_point[128];
43 uint64_t root_bitmap_off;
44 uint64_t data_start_off;
45 uint64_t root_bitmap_size;
48 uint64_t cluster_size;
50 uint64_t num_clusters;
51 uint64_t dir_node_size;
52 uint64_t file_node_size;
53 uint64_t internal_off;
54 uint64_t node_cfg_off;
55 uint64_t node_cfg_size;
61 struct ocfs1_super_block_label {
62 struct ocfs1_disk_lock {
65 uint8_t compat_pad[3];
66 uint64_t last_write_time;
67 uint64_t last_read_time;
68 uint32_t writer_node_num;
69 uint32_t reader_node_num;
70 uint64_t oin_node_map;
71 uint64_t dlock_seq_num;
77 uint8_t cluster_name[64];
78 uint16_t cluster_name_len;
81 struct ocfs2_super_block {
82 uint8_t i_signature[8];
83 uint32_t i_generation;
84 int16_t i_suballoc_slot;
85 uint16_t i_suballoc_bit;
92 uint16_t i_links_count;
99 uint64_t i_last_eb_blk;
100 uint32_t i_fs_generation;
101 uint32_t i_atime_nsec;
102 uint32_t i_ctime_nsec;
103 uint32_t i_mtime_nsec;
104 uint64_t i_reserved1[9];
106 uint16_t s_major_rev_level;
107 uint16_t s_minor_rev_level;
108 uint16_t s_mnt_count;
109 int16_t s_max_mnt_count;
112 uint32_t s_checkinterval;
113 uint64_t s_lastcheck;
114 uint32_t s_creator_os;
115 uint32_t s_feature_compat;
116 uint32_t s_feature_incompat;
117 uint32_t s_feature_ro_compat;
118 uint64_t s_root_blkno;
119 uint64_t s_system_dir_blkno;
120 uint32_t s_blocksize_bits;
121 uint32_t s_clustersize_bits;
122 uint16_t s_max_slots;
123 uint16_t s_reserved1;
124 uint32_t s_reserved2;
125 uint64_t s_first_cluster_group;
130 int volume_id_probe_ocfs1(struct volume_id *id, uint64_t off)
133 struct ocfs1_super_block_header *osh;
134 struct ocfs1_super_block_label *osl;
136 buf = volume_id_get_buffer(id, off, 0x200);
140 osh = (struct ocfs1_super_block_header *) buf;
141 if (memcmp(osh->signature, "OracleCFS", 9) != 0)
143 snprintf(id->type_version, sizeof(id->type_version)-1,
144 "%u.%u", osh->major_version, osh->minor_version);
146 dbg("found OracleCFS signature, now reading label");
147 buf = volume_id_get_buffer(id, off + 0x200, 0x200);
151 osl = (struct ocfs1_super_block_label *) buf;
152 volume_id_set_usage(id, VOLUME_ID_FILESYSTEM);
153 if (osl->label_len <= 64) {
154 volume_id_set_label_raw(id, osl->label, 64);
155 volume_id_set_label_string(id, osl->label, 64);
157 if (osl->vol_id_len == 16)
158 volume_id_set_uuid(id, osl->vol_id, UUID_DCE);
163 #define OCFS2_MAX_BLOCKSIZE 0x1000
164 #define OCFS2_SUPER_BLOCK_BLKNO 2
166 int volume_id_probe_ocfs2(struct volume_id *id, uint64_t off)
169 struct ocfs2_super_block *os;
172 dbg("probing at offset 0x%llx", (unsigned long long) off);
174 for (blksize = 0x200; blksize <= OCFS2_MAX_BLOCKSIZE; blksize <<= 1) {
175 buf = volume_id_get_buffer(id, off + OCFS2_SUPER_BLOCK_BLKNO * blksize, 0x200);
179 os = (struct ocfs2_super_block *) buf;
180 if (memcmp(os->i_signature, "OCFSV2", 6) != 0)
183 volume_id_set_usage(id, VOLUME_ID_FILESYSTEM);
184 volume_id_set_label_raw(id, os->s_label, 64);
185 volume_id_set_label_string(id, os->s_label, 64);
186 volume_id_set_uuid(id, os->s_uuid, UUID_DCE);
187 snprintf(id->type_version, sizeof(id->type_version)-1,
188 "%u.%u", os->s_major_rev_level, os->s_minor_rev_level);