ext4_utils.h revision 6bd2b5d80db5630cb73e3e5a4be3b38afa241c5a
1ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross/* 2ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross * Copyright (C) 2010 The Android Open Source Project 3ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross * 4ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross * Licensed under the Apache License, Version 2.0 (the "License"); 5ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross * you may not use this file except in compliance with the License. 6ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross * You may obtain a copy of the License at 7ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross * 8ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross * http://www.apache.org/licenses/LICENSE-2.0 9ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross * 10ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross * Unless required by applicable law or agreed to in writing, software 11ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross * distributed under the License is distributed on an "AS IS" BASIS, 12ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross * See the License for the specific language governing permissions and 14ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross * limitations under the License. 15ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross */ 16ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross 17ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross#ifndef _EXT4_UTILS_H_ 18ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross#define _EXT4_UTILS_H_ 19ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross 20ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross#include <sys/types.h> 21ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross#include <errno.h> 22ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross#include <stdarg.h> 23ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross#include <stdio.h> 24ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross#include <stdlib.h> 25ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross#include <string.h> 26ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross 27ec0a2e83dc66d67addeb90e83144187691852a3eColin Crossextern int force; 28ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross 29ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross#define warn(fmt, args...) do { fprintf(stderr, "warning: %s: " fmt "\n", __func__, ## args); } while (0) 30ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross#define error(fmt, args...) do { fprintf(stderr, "error: %s: " fmt "\n", __func__, ## args); if (!force) exit(EXIT_FAILURE); } while (0) 31ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross#define error_errno(s) error(s ": %s", strerror(errno)) 32ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross#define critical_error(fmt, args...) do { fprintf(stderr, "critical error: %s: " fmt "\n", __func__, ## args); exit(EXIT_FAILURE); } while (0) 33ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross#define critical_error_errno(s) critical_error(s ": %s", strerror(errno)) 34ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross 35ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross#define EXT4_SUPER_MAGIC 0xEF53 36ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross#define EXT4_JNL_BACKUP_BLOCKS 1 37ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross 38ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross#define min(a, b) ((a) < (b) ? (a) : (b)) 39ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross 40ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross#define DIV_ROUND_UP(x, y) (((x) + (y) - 1)/(y)) 416bd2b5d80db5630cb73e3e5a4be3b38afa241c5aColin Cross#define ALIGN(x, y) ((y) * DIV_ROUND_UP((x), (y))) 42ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross 43ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross#define __le64 u64 44ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross#define __le32 u32 45ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross#define __le16 u16 46ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross 47ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross#define __be64 u64 48ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross#define __be32 u32 49ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross#define __be16 u16 50ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross 51ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross#define __u64 u64 52ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross#define __u32 u32 53ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross#define __u16 u16 54ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross#define __u8 u8 55ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross 56ec0a2e83dc66d67addeb90e83144187691852a3eColin Crosstypedef unsigned long long u64; 57ec0a2e83dc66d67addeb90e83144187691852a3eColin Crosstypedef unsigned int u32; 58ec0a2e83dc66d67addeb90e83144187691852a3eColin Crosstypedef unsigned short int u16; 59ec0a2e83dc66d67addeb90e83144187691852a3eColin Crosstypedef unsigned char u8; 60ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross 61ec0a2e83dc66d67addeb90e83144187691852a3eColin Crossstruct block_group_info; 62ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross 63ec0a2e83dc66d67addeb90e83144187691852a3eColin Crossstruct ext2_group_desc { 64ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross __le32 bg_block_bitmap; 65ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross __le32 bg_inode_bitmap; 66ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross __le32 bg_inode_table; 67ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross __le16 bg_free_blocks_count; 68ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross __le16 bg_free_inodes_count; 69ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross __le16 bg_used_dirs_count; 70ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross __le16 bg_pad; 71ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross __le32 bg_reserved[3]; 72ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross}; 73ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross 74ec0a2e83dc66d67addeb90e83144187691852a3eColin Crossstruct fs_info { 75ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross u64 len; 76ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross u32 block_size; 77ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross u32 blocks_per_group; 78ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross u32 inodes_per_group; 79ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross u32 inode_size; 80ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross u32 inodes; 81ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross u32 journal_blocks; 82ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross u16 feat_ro_compat; 83ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross u16 feat_compat; 84ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross u16 feat_incompat; 85ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross const char *label; 86e4b5ae8ab07e698b95f004c9226000b02f853abcColin Cross u8 no_journal; 87ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross}; 88ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross 89ec0a2e83dc66d67addeb90e83144187691852a3eColin Crossstruct fs_aux_info { 90ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross struct ext4_super_block *sb; 91ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross struct ext2_group_desc *bg_desc; 92ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross struct block_group_info *bgs; 93ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross u32 first_data_block; 94ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross u64 len_blocks; 95ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross u32 inode_table_blocks; 96ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross u32 groups; 97ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross u32 bg_desc_blocks; 98ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross u32 bg_desc_reserve_blocks; 99ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross u32 default_i_flags; 100ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross u32 blocks_per_ind; 101ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross u32 blocks_per_dind; 102ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross u32 blocks_per_tind; 103ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross}; 104ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross 105ec0a2e83dc66d67addeb90e83144187691852a3eColin Crossextern struct fs_info info; 106ec0a2e83dc66d67addeb90e83144187691852a3eColin Crossextern struct fs_aux_info aux_info; 107ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross 108ec0a2e83dc66d67addeb90e83144187691852a3eColin Crossstatic inline int log_2(int j) 109ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross{ 110ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross int i; 111ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross 112ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross for (i = 0; j > 0; i++) 113ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross j >>= 1; 114ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross 115ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross return i - 1; 116ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross} 117ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross 118881cca2f88ddcce86483b3ba95546b5641de8c0eColin Crossint ext4_bg_has_super_block(int bg); 119881cca2f88ddcce86483b3ba95546b5641de8c0eColin Crossvoid write_ext4_image(const char *filename, int gz); 120881cca2f88ddcce86483b3ba95546b5641de8c0eColin Crossvoid ext4_create_fs_aux_info(void); 121881cca2f88ddcce86483b3ba95546b5641de8c0eColin Crossvoid ext4_free_fs_aux_info(void); 122881cca2f88ddcce86483b3ba95546b5641de8c0eColin Crossvoid ext4_fill_in_sb(void); 123881cca2f88ddcce86483b3ba95546b5641de8c0eColin Crossvoid ext4_create_resize_inode(void); 124881cca2f88ddcce86483b3ba95546b5641de8c0eColin Crossvoid ext4_create_journal_inode(void); 125881cca2f88ddcce86483b3ba95546b5641de8c0eColin Crossvoid ext4_update_free(void); 126881cca2f88ddcce86483b3ba95546b5641de8c0eColin Crossu64 get_file_size(const char *filename); 127881cca2f88ddcce86483b3ba95546b5641de8c0eColin Crossu64 parse_num(const char *arg); 128881cca2f88ddcce86483b3ba95546b5641de8c0eColin Cross 129ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross#endif 130