ext4_utils.h revision a7ed433f2dc0116627a93b18fbb260f0665ca0cb
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 2033f96c66e9a1f2e266a75e5e84c091dffa6ef118Colin Cross#define _GNU_SOURCE 2133f96c66e9a1f2e266a75e5e84c091dffa6ef118Colin Cross#define _FILE_OFFSET_BITS 64 2233f96c66e9a1f2e266a75e5e84c091dffa6ef118Colin Cross#define _LARGEFILE64_SOURCE 2333f96c66e9a1f2e266a75e5e84c091dffa6ef118Colin Cross#include <sys/types.h> 2433f96c66e9a1f2e266a75e5e84c091dffa6ef118Colin Cross#include <unistd.h> 2533f96c66e9a1f2e266a75e5e84c091dffa6ef118Colin Cross 26ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross#include <sys/types.h> 27ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross#include <errno.h> 28ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross#include <stdarg.h> 29ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross#include <stdio.h> 30ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross#include <stdlib.h> 31ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross#include <string.h> 32ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross 3333f96c66e9a1f2e266a75e5e84c091dffa6ef118Colin Cross#if defined(__APPLE__) && defined(__MACH__) 3433f96c66e9a1f2e266a75e5e84c091dffa6ef118Colin Cross#define lseek64 lseek 3533f96c66e9a1f2e266a75e5e84c091dffa6ef118Colin Cross#define off64_t off_t 3633f96c66e9a1f2e266a75e5e84c091dffa6ef118Colin Cross#endif 3733f96c66e9a1f2e266a75e5e84c091dffa6ef118Colin Cross 3833f96c66e9a1f2e266a75e5e84c091dffa6ef118Colin Cross#ifdef __BIONIC__ 3933f96c66e9a1f2e266a75e5e84c091dffa6ef118Colin Crossextern void* __mmap2(void *, size_t, int, int, int, off_t); 4033f96c66e9a1f2e266a75e5e84c091dffa6ef118Colin Crossstatic inline void *mmap64(void *addr, size_t length, int prot, int flags, 4133f96c66e9a1f2e266a75e5e84c091dffa6ef118Colin Cross int fd, off64_t offset) 4233f96c66e9a1f2e266a75e5e84c091dffa6ef118Colin Cross{ 4333f96c66e9a1f2e266a75e5e84c091dffa6ef118Colin Cross return __mmap2(addr, length, prot, flags, fd, offset >> 12); 4433f96c66e9a1f2e266a75e5e84c091dffa6ef118Colin Cross} 4533f96c66e9a1f2e266a75e5e84c091dffa6ef118Colin Cross#endif 4633f96c66e9a1f2e266a75e5e84c091dffa6ef118Colin Cross 47ec0a2e83dc66d67addeb90e83144187691852a3eColin Crossextern int force; 48ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross 49ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross#define warn(fmt, args...) do { fprintf(stderr, "warning: %s: " fmt "\n", __func__, ## args); } while (0) 50ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross#define error(fmt, args...) do { fprintf(stderr, "error: %s: " fmt "\n", __func__, ## args); if (!force) exit(EXIT_FAILURE); } while (0) 51a7ed433f2dc0116627a93b18fbb260f0665ca0cbColin Cross#define error_errno(s, args...) error(s ": %s", ##args, strerror(errno)) 52ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross#define critical_error(fmt, args...) do { fprintf(stderr, "critical error: %s: " fmt "\n", __func__, ## args); exit(EXIT_FAILURE); } while (0) 53a7ed433f2dc0116627a93b18fbb260f0665ca0cbColin Cross#define critical_error_errno(s, args...) critical_error(s ": %s", ##args, strerror(errno)) 54ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross 55ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross#define EXT4_SUPER_MAGIC 0xEF53 56ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross#define EXT4_JNL_BACKUP_BLOCKS 1 57ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross 58ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross#define min(a, b) ((a) < (b) ? (a) : (b)) 59ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross 60ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross#define DIV_ROUND_UP(x, y) (((x) + (y) - 1)/(y)) 616bd2b5d80db5630cb73e3e5a4be3b38afa241c5aColin Cross#define ALIGN(x, y) ((y) * DIV_ROUND_UP((x), (y))) 62ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross 63ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross#define __le64 u64 64ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross#define __le32 u32 65ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross#define __le16 u16 66ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross 67ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross#define __be64 u64 68ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross#define __be32 u32 69ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross#define __be16 u16 70ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross 71ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross#define __u64 u64 72ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross#define __u32 u32 73ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross#define __u16 u16 74ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross#define __u8 u8 75ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross 76ec0a2e83dc66d67addeb90e83144187691852a3eColin Crosstypedef unsigned long long u64; 77ec0a2e83dc66d67addeb90e83144187691852a3eColin Crosstypedef unsigned int u32; 78ec0a2e83dc66d67addeb90e83144187691852a3eColin Crosstypedef unsigned short int u16; 79ec0a2e83dc66d67addeb90e83144187691852a3eColin Crosstypedef unsigned char u8; 80ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross 81ec0a2e83dc66d67addeb90e83144187691852a3eColin Crossstruct block_group_info; 82ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross 83ec0a2e83dc66d67addeb90e83144187691852a3eColin Crossstruct ext2_group_desc { 84ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross __le32 bg_block_bitmap; 85ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross __le32 bg_inode_bitmap; 86ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross __le32 bg_inode_table; 87ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross __le16 bg_free_blocks_count; 88ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross __le16 bg_free_inodes_count; 89ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross __le16 bg_used_dirs_count; 90ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross __le16 bg_pad; 91ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross __le32 bg_reserved[3]; 92ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross}; 93ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross 94ec0a2e83dc66d67addeb90e83144187691852a3eColin Crossstruct fs_info { 95ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross u64 len; 96ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross u32 block_size; 97ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross u32 blocks_per_group; 98ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross u32 inodes_per_group; 99ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross u32 inode_size; 100ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross u32 inodes; 101ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross u32 journal_blocks; 102ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross u16 feat_ro_compat; 103ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross u16 feat_compat; 104ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross u16 feat_incompat; 10522742ce739a046a079b2e1b03342a25472dfa352Colin Cross u32 bg_desc_reserve_blocks; 106ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross const char *label; 107e4b5ae8ab07e698b95f004c9226000b02f853abcColin Cross u8 no_journal; 108ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross}; 109ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross 110ec0a2e83dc66d67addeb90e83144187691852a3eColin Crossstruct fs_aux_info { 111ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross struct ext4_super_block *sb; 112ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross struct ext2_group_desc *bg_desc; 113ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross struct block_group_info *bgs; 114ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross u32 first_data_block; 115ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross u64 len_blocks; 116ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross u32 inode_table_blocks; 117ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross u32 groups; 118ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross u32 bg_desc_blocks; 119ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross u32 default_i_flags; 120ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross u32 blocks_per_ind; 121ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross u32 blocks_per_dind; 122ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross u32 blocks_per_tind; 123ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross}; 124ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross 125ec0a2e83dc66d67addeb90e83144187691852a3eColin Crossextern struct fs_info info; 126ec0a2e83dc66d67addeb90e83144187691852a3eColin Crossextern struct fs_aux_info aux_info; 127ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross 128ec0a2e83dc66d67addeb90e83144187691852a3eColin Crossstatic inline int log_2(int j) 129ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross{ 130ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross int i; 131ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross 132ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross for (i = 0; j > 0; i++) 133ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross j >>= 1; 134ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross 135ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross return i - 1; 136ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross} 137ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross 138881cca2f88ddcce86483b3ba95546b5641de8c0eColin Crossint ext4_bg_has_super_block(int bg); 139757ace516d8e4350616b5fd10da0c982d3d5ec74Colin Crossvoid write_ext4_image(const char *filename, int gz, int sparse, int crc); 140881cca2f88ddcce86483b3ba95546b5641de8c0eColin Crossvoid ext4_create_fs_aux_info(void); 141881cca2f88ddcce86483b3ba95546b5641de8c0eColin Crossvoid ext4_free_fs_aux_info(void); 142881cca2f88ddcce86483b3ba95546b5641de8c0eColin Crossvoid ext4_fill_in_sb(void); 143881cca2f88ddcce86483b3ba95546b5641de8c0eColin Crossvoid ext4_create_resize_inode(void); 144881cca2f88ddcce86483b3ba95546b5641de8c0eColin Crossvoid ext4_create_journal_inode(void); 145881cca2f88ddcce86483b3ba95546b5641de8c0eColin Crossvoid ext4_update_free(void); 146b781330b1acae2e5706bbda8d81e5f7575f40e2aColin Crossvoid ext4_queue_sb(void); 147881cca2f88ddcce86483b3ba95546b5641de8c0eColin Crossu64 get_file_size(const char *filename); 148881cca2f88ddcce86483b3ba95546b5641de8c0eColin Crossu64 parse_num(const char *arg); 149a7ed433f2dc0116627a93b18fbb260f0665ca0cbColin Crossvoid ext4_parse_sb(struct ext4_super_block *sb); 150881cca2f88ddcce86483b3ba95546b5641de8c0eColin Cross 151ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross#endif 152