ext4_sb.h

   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 struct fs_info {
  29         int64_t len;    /* If set to 0, ask the block device for the size,
  30                          * if less than 0, reserve that much space at the
  31                          * end of the partition, else use the size given. */
  32         uint32_t block_size;
  33         uint32_t blocks_per_group;
  34         uint32_t inodes_per_group;
  35         uint32_t inode_size;
  36         uint32_t inodes;
  37         uint32_t journal_blocks;
  38         uint16_t feat_ro_compat;
  39         uint16_t feat_compat;
  40         uint16_t feat_incompat;
  41         uint32_t bg_desc_reserve_blocks;
  42         uint32_t reserve_pcnt;
  43         const char *label;
  44         uint8_t no_journal;
  45 };
  46
  47 int ext4_parse_sb(struct ext4_super_block *sb, struct fs_info *info);
  48
  49 #ifdef __cplusplus
  50 }
  51 #endif
  52
  53 #endif