1 /* 2 * Copyright (C) 2010 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_H_ 18 #define _EXT4_UTILS_H_ 19 20 #include <sys/types.h> 21 #include <errno.h> 22 #include <stdarg.h> 23 #include <stdio.h> 24 #include <stdlib.h> 25 #include <string.h> 26 27 extern int force; 28 29 #define warn(fmt, args...) do { fprintf(stderr, "warning: %s: " fmt "\n", __func__, ## args); } while (0) 30 #define error(fmt, args...) do { fprintf(stderr, "error: %s: " fmt "\n", __func__, ## args); if (!force) exit(EXIT_FAILURE); } while (0) 31 #define error_errno(s) error(s ": %s", strerror(errno)) 32 #define critical_error(fmt, args...) do { fprintf(stderr, "critical error: %s: " fmt "\n", __func__, ## args); exit(EXIT_FAILURE); } while (0) 33 #define critical_error_errno(s) critical_error(s ": %s", strerror(errno)) 34 35 #define EXT4_SUPER_MAGIC 0xEF53 36 #define EXT4_JNL_BACKUP_BLOCKS 1 37 38 #define min(a, b) ((a) < (b) ? (a) : (b)) 39 40 #define DIV_ROUND_UP(x, y) (((x) + (y) - 1)/(y)) 41 #define ALIGN(x, y) ((y) * DIV_ROUND_UP((x), (y))) 42 43 #define __le64 u64 44 #define __le32 u32 45 #define __le16 u16 46 47 #define __be64 u64 48 #define __be32 u32 49 #define __be16 u16 50 51 #define __u64 u64 52 #define __u32 u32 53 #define __u16 u16 54 #define __u8 u8 55 56 typedef unsigned long long u64; 57 typedef unsigned int u32; 58 typedef unsigned short int u16; 59 typedef unsigned char u8; 60 61 struct block_group_info; 62 63 struct ext2_group_desc { 64 __le32 bg_block_bitmap; 65 __le32 bg_inode_bitmap; 66 __le32 bg_inode_table; 67 __le16 bg_free_blocks_count; 68 __le16 bg_free_inodes_count; 69 __le16 bg_used_dirs_count; 70 __le16 bg_pad; 71 __le32 bg_reserved[3]; 72 }; 73 74 struct fs_info { 75 u64 len; 76 u32 block_size; 77 u32 blocks_per_group; 78 u32 inodes_per_group; 79 u32 inode_size; 80 u32 inodes; 81 u32 journal_blocks; 82 u16 feat_ro_compat; 83 u16 feat_compat; 84 u16 feat_incompat; 85 const char *label; 86 u8 no_journal; 87 }; 88 89 struct fs_aux_info { 90 struct ext4_super_block *sb; 91 struct ext2_group_desc *bg_desc; 92 struct block_group_info *bgs; 93 u32 first_data_block; 94 u64 len_blocks; 95 u32 inode_table_blocks; 96 u32 groups; 97 u32 bg_desc_blocks; 98 u32 bg_desc_reserve_blocks; 99 u32 default_i_flags; 100 u32 blocks_per_ind; 101 u32 blocks_per_dind; 102 u32 blocks_per_tind; 103 }; 104 105 extern struct fs_info info; 106 extern struct fs_aux_info aux_info; 107 108 static inline int log_2(int j) 109 { 110 int i; 111 112 for (i = 0; j > 0; i++) 113 j >>= 1; 114 115 return i - 1; 116 } 117 118 int ext4_bg_has_super_block(int bg); 119 void write_ext4_image(const char *filename, int gz, int sparse); 120 void ext4_create_fs_aux_info(void); 121 void ext4_free_fs_aux_info(void); 122 void ext4_fill_in_sb(void); 123 void ext4_create_resize_inode(void); 124 void ext4_create_journal_inode(void); 125 void ext4_update_free(void); 126 u64 get_file_size(const char *filename); 127 u64 parse_num(const char *arg); 128 129 #endif 130
