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
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation, either version 2 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program. If not, see <http://www.gnu.org/licenses/>.
32 #include "libvolume_id.h"
33 #include "libvolume_id-private.h"
35 struct ocfs1_super_block_header {
36 uint32_t minor_version;
37 uint32_t major_version;
38 uint8_t signature[128];
39 uint8_t mount_point[128];
46 uint64_t root_bitmap_off;
47 uint64_t data_start_off;
48 uint64_t root_bitmap_size;
51 uint64_t cluster_size;
53 uint64_t num_clusters;
54 uint64_t dir_node_size;
55 uint64_t file_node_size;
56 uint64_t internal_off;
57 uint64_t node_cfg_off;
58 uint64_t node_cfg_size;
64 struct ocfs1_super_block_label {
65 struct ocfs1_disk_lock {
68 uint8_t compat_pad[3];
69 uint64_t last_write_time;
70 uint64_t last_read_time;
71 uint32_t writer_node_num;
72 uint32_t reader_node_num;
73 uint64_t oin_node_map;
74 uint64_t dlock_seq_num;
80 uint8_t cluster_name[64];
81 uint16_t cluster_name_len;
84 struct ocfs2_super_block {
85 uint8_t i_signature[8];
86 uint32_t i_generation;
87 int16_t i_suballoc_slot;
88 uint16_t i_suballoc_bit;
95 uint16_t i_links_count;
102 uint64_t i_last_eb_blk;
103 uint32_t i_fs_generation;
104 uint32_t i_atime_nsec;
105 uint32_t i_ctime_nsec;
106 uint32_t i_mtime_nsec;
107 uint64_t i_reserved1[9];
109 uint16_t s_major_rev_level;
110 uint16_t s_minor_rev_level;
111 uint16_t s_mnt_count;
112 int16_t s_max_mnt_count;
115 uint32_t s_checkinterval;
116 uint64_t s_lastcheck;
117 uint32_t s_creator_os;
118 uint32_t s_feature_compat;
119 uint32_t s_feature_incompat;
120 uint32_t s_feature_ro_compat;
121 uint64_t s_root_blkno;
122 uint64_t s_system_dir_blkno;
123 uint32_t s_blocksize_bits;
124 uint32_t s_clustersize_bits;
125 uint16_t s_max_slots;
126 uint16_t s_reserved1;
127 uint32_t s_reserved2;
128 uint64_t s_first_cluster_group;
133 int volume_id_probe_ocfs1(struct volume_id *id, uint64_t off, uint64_t size)
136 struct ocfs1_super_block_header *osh;
137 struct ocfs1_super_block_label *osl;
139 info("probing at offset 0x%" PRIx64 "\n", off);
141 buf = volume_id_get_buffer(id, off, 0x200);
145 osh = (struct ocfs1_super_block_header *) buf;
146 if (memcmp(osh->signature, "OracleCFS", 9) != 0)
148 snprintf(id->type_version, sizeof(id->type_version)-1,
149 "%u.%u", osh->major_version, osh->minor_version);
151 dbg("found OracleCFS signature, now reading label\n");
152 buf = volume_id_get_buffer(id, off + 0x200, 0x200);
156 osl = (struct ocfs1_super_block_label *) buf;
157 volume_id_set_usage(id, VOLUME_ID_FILESYSTEM);
158 if (osl->label_len <= 64) {
159 volume_id_set_label_raw(id, osl->label, 64);
160 volume_id_set_label_string(id, osl->label, 64);
162 if (osl->vol_id_len == 16)
163 volume_id_set_uuid(id, osl->vol_id, 0, UUID_DCE);
168 #define OCFS2_MAX_BLOCKSIZE 0x1000
169 #define OCFS2_SUPER_BLOCK_BLKNO 2
171 int volume_id_probe_ocfs2(struct volume_id *id, uint64_t off, uint64_t size)
174 struct ocfs2_super_block *os;
177 info("probing at offset 0x%" PRIx64 "\n", off);
179 for (blksize = 0x200; blksize <= OCFS2_MAX_BLOCKSIZE; blksize <<= 1) {
180 buf = volume_id_get_buffer(id, off + OCFS2_SUPER_BLOCK_BLKNO * blksize, 0x200);
184 os = (struct ocfs2_super_block *) buf;
185 if (memcmp(os->i_signature, "OCFSV2", 6) != 0)
188 volume_id_set_usage(id, VOLUME_ID_FILESYSTEM);
189 volume_id_set_label_raw(id, os->s_label, 64);
190 volume_id_set_label_string(id, os->s_label, 64);
191 volume_id_set_uuid(id, os->s_uuid, 0, UUID_DCE);
192 snprintf(id->type_version, sizeof(id->type_version)-1,
193 "%u.%u", os->s_major_rev_level, os->s_minor_rev_level);