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"
31 struct ocfs1_super_block_header {
32 uint32_t minor_version;
33 uint32_t major_version;
34 uint8_t signature[128];
35 uint8_t mount_point[128];
42 uint64_t root_bitmap_off;
43 uint64_t data_start_off;
44 uint64_t root_bitmap_size;
47 uint64_t cluster_size;
49 uint64_t num_clusters;
50 uint64_t dir_node_size;
51 uint64_t file_node_size;
52 uint64_t internal_off;
53 uint64_t node_cfg_off;
54 uint64_t node_cfg_size;
60 struct ocfs1_super_block_label {
61 struct ocfs1_disk_lock {
64 uint8_t compat_pad[3];
65 uint64_t last_write_time;
66 uint64_t last_read_time;
67 uint32_t writer_node_num;
68 uint32_t reader_node_num;
69 uint64_t oin_node_map;
70 uint64_t dlock_seq_num;
76 uint8_t cluster_name[64];
77 uint16_t cluster_name_len;
80 struct ocfs2_super_block {
81 uint8_t i_signature[8];
82 uint32_t i_generation;
83 int16_t i_suballoc_slot;
84 uint16_t i_suballoc_bit;
91 uint16_t i_links_count;
98 uint64_t i_last_eb_blk;
99 uint32_t i_fs_generation;
100 uint32_t i_atime_nsec;
101 uint32_t i_ctime_nsec;
102 uint32_t i_mtime_nsec;
103 uint64_t i_reserved1[9];
105 uint16_t s_major_rev_level;
106 uint16_t s_minor_rev_level;
107 uint16_t s_mnt_count;
108 int16_t s_max_mnt_count;
111 uint32_t s_checkinterval;
112 uint64_t s_lastcheck;
113 uint32_t s_creator_os;
114 uint32_t s_feature_compat;
115 uint32_t s_feature_incompat;
116 uint32_t s_feature_ro_compat;
117 uint64_t s_root_blkno;
118 uint64_t s_system_dir_blkno;
119 uint32_t s_blocksize_bits;
120 uint32_t s_clustersize_bits;
121 uint16_t s_max_slots;
122 uint16_t s_reserved1;
123 uint32_t s_reserved2;
124 uint64_t s_first_cluster_group;
129 int volume_id_probe_ocfs1(struct volume_id *id, uint64_t off, uint64_t size)
132 struct ocfs1_super_block_header *osh;
133 struct ocfs1_super_block_label *osl;
135 info("probing at offset 0x%llx", (unsigned long long) off);
137 buf = volume_id_get_buffer(id, off, 0x200);
141 osh = (struct ocfs1_super_block_header *) buf;
142 if (memcmp(osh->signature, "OracleCFS", 9) != 0)
144 snprintf(id->type_version, sizeof(id->type_version)-1,
145 "%u.%u", osh->major_version, osh->minor_version);
147 dbg("found OracleCFS signature, now reading label");
148 buf = volume_id_get_buffer(id, off + 0x200, 0x200);
152 osl = (struct ocfs1_super_block_label *) buf;
153 volume_id_set_usage(id, VOLUME_ID_FILESYSTEM);
154 if (osl->label_len <= 64) {
155 volume_id_set_label_raw(id, osl->label, 64);
156 volume_id_set_label_string(id, osl->label, 64);
158 if (osl->vol_id_len == 16)
159 volume_id_set_uuid(id, osl->vol_id, UUID_DCE);
164 #define OCFS2_MAX_BLOCKSIZE 0x1000
165 #define OCFS2_SUPER_BLOCK_BLKNO 2
167 int volume_id_probe_ocfs2(struct volume_id *id, uint64_t off, uint64_t size)
170 struct ocfs2_super_block *os;
173 info("probing at offset 0x%llx", (unsigned long long) off);
175 for (blksize = 0x200; blksize <= OCFS2_MAX_BLOCKSIZE; blksize <<= 1) {
176 buf = volume_id_get_buffer(id, off + OCFS2_SUPER_BLOCK_BLKNO * blksize, 0x200);
180 os = (struct ocfs2_super_block *) buf;
181 if (memcmp(os->i_signature, "OCFSV2", 6) != 0)
184 volume_id_set_usage(id, VOLUME_ID_FILESYSTEM);
185 volume_id_set_label_raw(id, os->s_label, 64);
186 volume_id_set_label_string(id, os->s_label, 64);
187 volume_id_set_uuid(id, os->s_uuid, UUID_DCE);
188 snprintf(id->type_version, sizeof(id->type_version)-1,
189 "%u.%u", os->s_major_rev_level, os->s_minor_rev_level);