1 /*
2  * Copyright (C) 2014 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #ifndef _EXT4_UTILS_EXT4_SB_H_
18 #define _EXT4_UTILS_EXT4_SB_H_
19 
20 #include "ext4_utils/ext4_kernel_headers.h"
21 
22 #define EXT4_SUPER_MAGIC 0xEF53
23 
24 #ifdef __cplusplus
25 extern "C" {
26 #endif
27 
28 #include <stdbool.h>
29 
30 struct fs_info {
31     int64_t len; /* If set to 0, ask the block device for the size,
32                   * if less than 0, reserve that much space at the
33                   * end of the partition, else use the size given. */
34     uint32_t block_size;
35     uint32_t blocks_per_group;
36     uint32_t flash_erase_block_size;
37     uint32_t flash_logical_block_size;
38     uint32_t inodes_per_group;
39     uint32_t inode_size;
40     uint32_t inodes;
41     uint32_t journal_blocks;
42     uint32_t feat_ro_compat;
43     uint32_t feat_compat;
44     uint32_t feat_incompat;
45     uint32_t bg_desc_reserve_blocks;
46     uint16_t bg_desc_size;
47     const char* label;
48     uint8_t no_journal;
49     bool block_device; /* target fd is a block device? */
50 };
51 
52 int ext4_parse_sb(struct ext4_super_block* sb, struct fs_info* info);
53 
54 #ifdef __cplusplus
55 }
56 #endif
57 
58 #endif
59