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 #ifdef __cplusplus 21 extern "C" { 22 #endif 23 24 #ifndef _GNU_SOURCE 25 #define _GNU_SOURCE 26 #endif 27 #define _FILE_OFFSET_BITS 64 28 #define _LARGEFILE64_SOURCE 1 29 #include <sys/types.h> 30 #include <unistd.h> 31 32 #include <sys/types.h> 33 #include <errno.h> 34 #include <stdarg.h> 35 #include <stdio.h> 36 #include <stdlib.h> 37 #include <string.h> 38 #include <setjmp.h> 39 #include <stdint.h> 40 41 #if defined(__APPLE__) && defined(__MACH__) 42 #define lseek64 lseek 43 #define ftruncate64 ftruncate 44 #define mmap64 mmap 45 #define off64_t off_t 46 #endif 47 48 #include "ext4_sb.h" 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_JNL_BACKUP_BLOCKS 1 59 60 #ifndef min /* already defined by windows.h */ 61 #define min(a, b) ((a) < (b) ? (a) : (b)) 62 #endif 63 64 #define DIV_ROUND_UP(x, y) (((x) + (y) - 1)/(y)) 65 #define EXT4_ALIGN(x, y) ((y) * DIV_ROUND_UP((x), (y))) 66 67 /* XXX */ 68 #define cpu_to_le32(x) (x) 69 #define cpu_to_le16(x) (x) 70 #define le32_to_cpu(x) (x) 71 #define le16_to_cpu(x) (x) 72 73 #ifdef __LP64__ 74 typedef unsigned long u64; 75 typedef signed long s64; 76 #else 77 typedef unsigned long long u64; 78 typedef signed long long s64; 79 #endif 80 typedef unsigned int u32; 81 typedef unsigned short int u16; 82 typedef unsigned char u8; 83 84 struct block_group_info; 85 struct xattr_list_element; 86 87 struct ext2_group_desc { 88 u32 bg_block_bitmap; 89 u32 bg_inode_bitmap; 90 u32 bg_inode_table; 91 u16 bg_free_blocks_count; 92 u16 bg_free_inodes_count; 93 u16 bg_used_dirs_count; 94 u16 bg_flags; 95 u32 bg_reserved[2]; 96 u16 bg_reserved16; 97 u16 bg_checksum; 98 }; 99 100 struct fs_aux_info { 101 struct ext4_super_block *sb; 102 struct ext4_super_block **backup_sb; 103 struct ext2_group_desc *bg_desc; 104 struct block_group_info *bgs; 105 struct xattr_list_element *xattrs; 106 u32 first_data_block; 107 u64 len_blocks; 108 u32 inode_table_blocks; 109 u32 groups; 110 u32 bg_desc_blocks; 111 u32 default_i_flags; 112 u32 blocks_per_ind; 113 u32 blocks_per_dind; 114 u32 blocks_per_tind; 115 }; 116 117 extern struct fs_info info; 118 extern struct fs_aux_info aux_info; 119 extern struct sparse_file *ext4_sparse_file; 120 121 extern jmp_buf setjmp_env; 122 123 static inline int log_2(int j) 124 { 125 int i; 126 127 for (i = 0; j > 0; i++) 128 j >>= 1; 129 130 return i - 1; 131 } 132 133 int bitmap_get_bit(u8 *bitmap, u32 bit); 134 void bitmap_clear_bit(u8 *bitmap, u32 bit); 135 int ext4_bg_has_super_block(int bg); 136 void read_sb(int fd, struct ext4_super_block *sb); 137 void write_sb(int fd, unsigned long long offset, struct ext4_super_block *sb); 138 void write_ext4_image(int fd, int gz, int sparse, int crc); 139 void ext4_create_fs_aux_info(void); 140 void ext4_free_fs_aux_info(void); 141 void ext4_fill_in_sb(void); 142 void ext4_create_resize_inode(void); 143 void ext4_create_journal_inode(void); 144 void ext4_update_free(void); 145 void ext4_queue_sb(void); 146 u64 get_block_device_size(int fd); 147 int is_block_device_fd(int fd); 148 u64 get_file_size(int fd); 149 u64 parse_num(const char *arg); 150 void ext4_parse_sb_info(struct ext4_super_block *sb); 151 u16 ext4_crc16(u16 crc_in, const void *buf, int size); 152 153 typedef void (*fs_config_func_t)(const char *path, int dir, unsigned *uid, unsigned *gid, 154 unsigned *mode, uint64_t *capabilities); 155 156 struct selabel_handle; 157 158 int make_ext4fs_internal(int fd, const char *directory, 159 const char *mountpoint, fs_config_func_t fs_config_func, int gzip, 160 int sparse, int crc, int wipe, 161 struct selabel_handle *sehnd, int verbose, time_t fixed_time, 162 FILE* block_list_file); 163 164 int read_ext(int fd, int verbose); 165 166 #ifdef __cplusplus 167 } 168 #endif 169 170 #endif 171
