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 31 #ifndef __APPLE__ 32 #include <sys/sysmacros.h> 33 #endif 34 35 #include <unistd.h> 36 #include <errno.h> 37 #include <stdarg.h> 38 #include <stdio.h> 39 #include <stdlib.h> 40 #include <string.h> 41 #include <setjmp.h> 42 #include <stdint.h> 43 44 #include "ext4_sb.h" 45 46 extern int force; 47 48 #define warn(fmt, args...) do { fprintf(stderr, "warning: %s: " fmt "\n", __func__, ## args); } while (0) 49 #define error(fmt, args...) do { fprintf(stderr, "error: %s: " fmt "\n", __func__, ## args); if (!force) longjmp(setjmp_env, EXIT_FAILURE); } while (0) 50 #define error_errno(s, args...) error(s ": %s", ##args, strerror(errno)) 51 #define critical_error(fmt, args...) do { fprintf(stderr, "critical error: %s: " fmt "\n", __func__, ## args); longjmp(setjmp_env, EXIT_FAILURE); } while (0) 52 #define critical_error_errno(s, args...) critical_error(s ": %s", ##args, strerror(errno)) 53 54 #define EXT4_JNL_BACKUP_BLOCKS 1 55 56 #ifndef min /* already defined by windows.h */ 57 #define min(a, b) ((a) < (b) ? (a) : (b)) 58 #endif 59 60 #define DIV_ROUND_UP(x, y) (((x) + (y) - 1)/(y)) 61 #define EXT4_ALIGN(x, y) ((y) * DIV_ROUND_UP((x), (y))) 62 63 /* XXX */ 64 #define cpu_to_le32(x) (x) 65 #define cpu_to_le16(x) (x) 66 #define le32_to_cpu(x) (x) 67 #define le16_to_cpu(x) (x) 68 69 #ifdef __LP64__ 70 typedef unsigned long u64; 71 typedef signed long s64; 72 #else 73 typedef unsigned long long u64; 74 typedef signed long long s64; 75 #endif 76 typedef unsigned int u32; 77 typedef unsigned short int u16; 78 typedef unsigned char u8; 79 80 struct block_group_info; 81 struct xattr_list_element; 82 83 struct ext2_group_desc { 84 u32 bg_block_bitmap; 85 u32 bg_inode_bitmap; 86 u32 bg_inode_table; 87 u16 bg_free_blocks_count; 88 u16 bg_free_inodes_count; 89 u16 bg_used_dirs_count; 90 u16 bg_flags; 91 u32 bg_reserved[2]; 92 u16 bg_reserved16; 93 u16 bg_checksum; 94 }; 95 96 struct fs_aux_info { 97 struct ext4_super_block *sb; 98 struct ext4_super_block **backup_sb; 99 struct ext2_group_desc *bg_desc; 100 struct block_group_info *bgs; 101 struct xattr_list_element *xattrs; 102 u32 first_data_block; 103 u64 len_blocks; 104 u32 inode_table_blocks; 105 u32 groups; 106 u32 bg_desc_blocks; 107 u32 default_i_flags; 108 u32 blocks_per_ind; 109 u32 blocks_per_dind; 110 u32 blocks_per_tind; 111 }; 112 113 extern struct fs_info info; 114 extern struct fs_aux_info aux_info; 115 extern struct sparse_file *ext4_sparse_file; 116 117 extern jmp_buf setjmp_env; 118 119 static inline int log_2(int j) 120 { 121 int i; 122 123 for (i = 0; j > 0; i++) 124 j >>= 1; 125 126 return i - 1; 127 } 128 129 int bitmap_get_bit(u8 *bitmap, u32 bit); 130 void bitmap_clear_bit(u8 *bitmap, u32 bit); 131 int ext4_bg_has_super_block(int bg); 132 void read_sb(int fd, struct ext4_super_block *sb); 133 void write_sb(int fd, unsigned long long offset, struct ext4_super_block *sb); 134 void write_ext4_image(int fd, int gz, int sparse, int crc); 135 void ext4_create_fs_aux_info(void); 136 void ext4_free_fs_aux_info(void); 137 void ext4_fill_in_sb(void); 138 void ext4_create_resize_inode(void); 139 void ext4_create_journal_inode(void); 140 void ext4_update_free(void); 141 void ext4_queue_sb(void); 142 u64 get_block_device_size(int fd); 143 int is_block_device_fd(int fd); 144 u64 get_file_size(int fd); 145 u64 parse_num(const char *arg); 146 void ext4_parse_sb_info(struct ext4_super_block *sb); 147 u16 ext4_crc16(u16 crc_in, const void *buf, int size); 148 149 typedef int (*fs_config_func_t)(const char *path, int dir, unsigned *uid, unsigned *gid, 150 unsigned *mode, uint64_t *capabilities); 151 152 struct selabel_handle; 153 154 int make_ext4fs_internal(int fd, const char *directory, 155 fs_config_func_t fs_config_func, int gzip, 156 int sparse, int crc, int wipe, 157 int verbose, time_t fixed_time, 158 FILE* block_list_file); 159 160 int read_ext(int fd, int verbose); 161 162 #ifdef __cplusplus 163 } 164 #endif 165 166 #endif 167
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