2 * Copyright (C) 2010 The Android Open Source Project
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
8 * http://www.apache.org/licenses/LICENSE-2.0
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.
17 #ifndef _EXT4_UTILS_H_
18 #define _EXT4_UTILS_H_
27 #define _FILE_OFFSET_BITS 64
28 #define _LARGEFILE64_SOURCE 1
29 #include <sys/types.h>
32 #include <sys/types.h>
41 #if defined(__APPLE__) && defined(__MACH__)
43 #define ftruncate64 ftruncate
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))
58 #define EXT4_JNL_BACKUP_BLOCKS 1
60 #ifndef min /* already defined by windows.h */
61 #define min(a, b) ((a) < (b) ? (a) : (b))
64 #define DIV_ROUND_UP(x, y) (((x) + (y) - 1)/(y))
65 #define EXT4_ALIGN(x, y) ((y) * DIV_ROUND_UP((x), (y)))
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)
74 typedef unsigned long u64;
75 typedef signed long s64;
77 typedef unsigned long long u64;
78 typedef signed long long s64;
80 typedef unsigned int u32;
81 typedef unsigned short int u16;
82 typedef unsigned char u8;
84 struct block_group_info;
85 struct xattr_list_element;
87 struct ext2_group_desc {
91 u16 bg_free_blocks_count;
92 u16 bg_free_inodes_count;
93 u16 bg_used_dirs_count;
101 struct ext4_super_block *sb;
102 struct ext4_super_block *sb_block;
103 struct ext4_super_block *sb_zero;
104 struct ext4_super_block **backup_sb;
105 struct ext2_group_desc *bg_desc;
106 struct block_group_info *bgs;
107 struct xattr_list_element *xattrs;
108 u32 first_data_block;
110 u32 inode_table_blocks;
119 extern struct fs_info info;
120 extern struct fs_aux_info aux_info;
121 extern struct sparse_file *ext4_sparse_file;
123 extern jmp_buf setjmp_env;
125 static inline int log_2(int j)
129 for (i = 0; j > 0; i++)
135 int bitmap_get_bit(u8 *bitmap, u32 bit);
136 void bitmap_clear_bit(u8 *bitmap, u32 bit);
137 int ext4_bg_has_super_block(int bg);
138 void read_sb(int fd, struct ext4_super_block *sb);
139 void write_sb(int fd, unsigned long long offset, struct ext4_super_block *sb);
140 void write_ext4_image(int fd, int gz, int sparse, int crc);
141 void ext4_create_fs_aux_info(void);
142 void ext4_free_fs_aux_info(void);
143 void ext4_fill_in_sb(int real_uuid);
144 void ext4_create_resize_inode(void);
145 void ext4_create_journal_inode(void);
146 void ext4_update_free(void);
147 void ext4_queue_sb(u64 start_block, struct ext4_super_block *sb);
148 u64 get_block_device_size(int fd);
149 int is_block_device_fd(int fd);
150 u64 get_file_size(int fd);
151 u64 parse_num(const char *arg);
152 void ext4_parse_sb_info(struct ext4_super_block *sb);
153 u16 ext4_crc16(u16 crc_in, const void *buf, int size);
155 typedef void (*fs_config_func_t)(const char *path, int dir, const char *target_out_path,
156 unsigned *uid, unsigned *gid, unsigned *mode, uint64_t *capabilities);
158 struct selabel_handle;
160 int make_ext4fs_internal(int fd, const char *directory, const char *_target_out_directory,
161 const char *mountpoint, fs_config_func_t fs_config_func, int gzip,
162 int sparse, int crc, int wipe, int real_uuid,
163 struct selabel_handle *sehnd, int verbose, time_t fixed_time,
164 FILE* block_list_file);
166 int read_ext(int fd, int verbose);