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      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_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 inodes_per_group;
     37 	uint32_t inode_size;
     38 	uint32_t inodes;
     39 	uint32_t journal_blocks;
     40 	uint16_t feat_ro_compat;
     41 	uint16_t feat_compat;
     42 	uint16_t feat_incompat;
     43 	uint32_t bg_desc_reserve_blocks;
     44 	const char *label;
     45 	uint8_t no_journal;
     46 	bool block_device;	/* target fd is a block device? */
     47 };
     48 
     49 int ext4_parse_sb(struct ext4_super_block *sb, struct fs_info *info);
     50 
     51 #ifdef __cplusplus
     52 }
     53 #endif
     54 
     55 #endif
     56