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 #define _GNU_SOURCE 21 #define _FILE_OFFSET_BITS 64 22 #define _LARGEFILE64_SOURCE 23 #include <sys/types.h> 24 #include <unistd.h> 25 26 #include <sys/types.h> 27 #include <errno.h> 28 #include <stdarg.h> 29 #include <stdio.h> 30 #include <stdlib.h> 31 #include <string.h> 32 #include <setjmp.h> 33 34 #if defined(__APPLE__) && defined(__MACH__) 35 #define lseek64 lseek 36 #define ftruncate64 ftruncate 37 #define mmap64 mmap 38 #define off64_t off_t 39 #endif 40 41 #ifdef __BIONIC__ 42 extern void* __mmap2(void *, size_t, int, int, int, off_t); 43 static inline void *mmap64(void *addr, size_t length, int prot, int flags, 44 int fd, off64_t offset) 45 { 46 return __mmap2(addr, length, prot, flags, fd, offset >> 12); 47 } 48 #endif 49 50 extern int force; 51 52 #define warn(fmt, args...) do { fprintf(stderr, "warning: %s: " fmt "\n", __func__, ## args); } while (0) 53 #define error(fmt, args...) do { fprintf(stderr, "error: %s: " fmt "\n", __func__, ## args); if (!force) longjmp(setjmp_env, EXIT_FAILURE); } while (0) 54 #define error_errno(s, args...) error(s ": %s", ##args, strerror(errno)) 55 #define critical_error(fmt, args...) do { fprintf(stderr, "critical error: %s: " fmt "\n", __func__, ## args); longjmp(setjmp_env, EXIT_FAILURE); } while (0) 56 #define critical_error_errno(s, args...) critical_error(s ": %s", ##args, strerror(errno)) 57 58 #define EXT4_SUPER_MAGIC 0xEF53 59 #define EXT4_JNL_BACKUP_BLOCKS 1 60 61 #define min(a, b) ((a) < (b) ? (a) : (b)) 62 63 #define DIV_ROUND_UP(x, y) (((x) + (y) - 1)/(y)) 64 #define ALIGN(x, y) ((y) * DIV_ROUND_UP((x), (y))) 65 66 #define __le64 u64 67 #define __le32 u32 68 #define __le16 u16 69 70 #define __be64 u64 71 #define __be32 u32 72 #define __be16 u16 73 74 #define __u64 u64 75 #define __u32 u32 76 #define __u16 u16 77 #define __u8 u8 78 79 typedef unsigned long long u64; 80 typedef signed long long s64; 81 typedef unsigned int u32; 82 typedef unsigned short int u16; 83 typedef unsigned char u8; 84 85 struct block_group_info; 86 87 struct ext2_group_desc { 88 __le32 bg_block_bitmap; 89 __le32 bg_inode_bitmap; 90 __le32 bg_inode_table; 91 __le16 bg_free_blocks_count; 92 __le16 bg_free_inodes_count; 93 __le16 bg_used_dirs_count; 94 __le16 bg_pad; 95 __le32 bg_reserved[3]; 96 }; 97 98 struct fs_info { 99 s64 len; /* If set to 0, ask the block device for the size, 100 * if less than 0, reserve that much space at the 101 * end of the partition, else use the size given. */ 102 u32 block_size; 103 u32 blocks_per_group; 104 u32 inodes_per_group; 105 u32 inode_size; 106 u32 inodes; 107 u32 journal_blocks; 108 u16 feat_ro_compat; 109 u16 feat_compat; 110 u16 feat_incompat; 111 u32 bg_desc_reserve_blocks; 112 const char *label; 113 u8 no_journal; 114 }; 115 116 struct fs_aux_info { 117 struct ext4_super_block *sb; 118 struct ext4_super_block **backup_sb; 119 struct ext2_group_desc *bg_desc; 120 struct block_group_info *bgs; 121 u32 first_data_block; 122 u64 len_blocks; 123 u32 inode_table_blocks; 124 u32 groups; 125 u32 bg_desc_blocks; 126 u32 default_i_flags; 127 u32 blocks_per_ind; 128 u32 blocks_per_dind; 129 u32 blocks_per_tind; 130 }; 131 132 extern struct fs_info info; 133 extern struct fs_aux_info aux_info; 134 135 extern jmp_buf setjmp_env; 136 137 static inline int log_2(int j) 138 { 139 int i; 140 141 for (i = 0; j > 0; i++) 142 j >>= 1; 143 144 return i - 1; 145 } 146 147 int ext4_bg_has_super_block(int bg); 148 void write_ext4_image(const char *filename, int gz, int sparse, int crc, 149 int wipe); 150 void ext4_create_fs_aux_info(void); 151 void ext4_free_fs_aux_info(void); 152 void ext4_fill_in_sb(void); 153 void ext4_create_resize_inode(void); 154 void ext4_create_journal_inode(void); 155 void ext4_update_free(void); 156 void ext4_queue_sb(void); 157 u64 get_file_size(const char *filename); 158 u64 parse_num(const char *arg); 159 void ext4_parse_sb(struct ext4_super_block *sb); 160 161 #endif 162
