ext4_utils.h revision 4df62f342dbbe2f5cca831ce789dc0426d32ec03
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 20e8d74ff5c3253403d3e5c96edc80dfc3e5f8ada8Doug Zongker#ifdef __cplusplus 21e8d74ff5c3253403d3e5c96edc80dfc3e5f8ada8Doug Zongkerextern "C" { 22e8d74ff5c3253403d3e5c96edc80dfc3e5f8ada8Doug Zongker#endif 23e8d74ff5c3253403d3e5c96edc80dfc3e5f8ada8Doug Zongker 24e8d74ff5c3253403d3e5c96edc80dfc3e5f8ada8Doug Zongker#ifndef _GNU_SOURCE 2533f96c66e9a1f2e266a75e5e84c091dffa6ef118Colin Cross#define _GNU_SOURCE 26e8d74ff5c3253403d3e5c96edc80dfc3e5f8ada8Doug Zongker#endif 2733f96c66e9a1f2e266a75e5e84c091dffa6ef118Colin Cross#define _FILE_OFFSET_BITS 64 28dc5abeee1e6fc4827ee0d5ece12aaed2dd56f4c7Colin Cross#define _LARGEFILE64_SOURCE 1 2933f96c66e9a1f2e266a75e5e84c091dffa6ef118Colin Cross#include <sys/types.h> 3033f96c66e9a1f2e266a75e5e84c091dffa6ef118Colin Cross#include <unistd.h> 3133f96c66e9a1f2e266a75e5e84c091dffa6ef118Colin Cross 32ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross#include <sys/types.h> 33ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross#include <errno.h> 34ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross#include <stdarg.h> 35ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross#include <stdio.h> 36ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross#include <stdlib.h> 37ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross#include <string.h> 382ae7663e1e064000356ee9e49ebd08bdddc545f9Ken Sumrall#include <setjmp.h> 394df62f342dbbe2f5cca831ce789dc0426d32ec03Nick Kralevich#include <stdint.h> 40ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross 4133f96c66e9a1f2e266a75e5e84c091dffa6ef118Colin Cross#if defined(__APPLE__) && defined(__MACH__) 4233f96c66e9a1f2e266a75e5e84c091dffa6ef118Colin Cross#define lseek64 lseek 43fe4a03182b5b17d333511c72406f926a791345d3Colin Cross#define ftruncate64 ftruncate 44fe4a03182b5b17d333511c72406f926a791345d3Colin Cross#define mmap64 mmap 4533f96c66e9a1f2e266a75e5e84c091dffa6ef118Colin Cross#define off64_t off_t 4633f96c66e9a1f2e266a75e5e84c091dffa6ef118Colin Cross#endif 4733f96c66e9a1f2e266a75e5e84c091dffa6ef118Colin Cross 4833f96c66e9a1f2e266a75e5e84c091dffa6ef118Colin Cross#ifdef __BIONIC__ 4933f96c66e9a1f2e266a75e5e84c091dffa6ef118Colin Crossextern void* __mmap2(void *, size_t, int, int, int, off_t); 5033f96c66e9a1f2e266a75e5e84c091dffa6ef118Colin Crossstatic inline void *mmap64(void *addr, size_t length, int prot, int flags, 5133f96c66e9a1f2e266a75e5e84c091dffa6ef118Colin Cross int fd, off64_t offset) 5233f96c66e9a1f2e266a75e5e84c091dffa6ef118Colin Cross{ 5333f96c66e9a1f2e266a75e5e84c091dffa6ef118Colin Cross return __mmap2(addr, length, prot, flags, fd, offset >> 12); 5433f96c66e9a1f2e266a75e5e84c091dffa6ef118Colin Cross} 5533f96c66e9a1f2e266a75e5e84c091dffa6ef118Colin Cross#endif 5633f96c66e9a1f2e266a75e5e84c091dffa6ef118Colin Cross 57ec0a2e83dc66d67addeb90e83144187691852a3eColin Crossextern int force; 58ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross 59ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross#define warn(fmt, args...) do { fprintf(stderr, "warning: %s: " fmt "\n", __func__, ## args); } while (0) 602ae7663e1e064000356ee9e49ebd08bdddc545f9Ken Sumrall#define error(fmt, args...) do { fprintf(stderr, "error: %s: " fmt "\n", __func__, ## args); if (!force) longjmp(setjmp_env, EXIT_FAILURE); } while (0) 61a7ed433f2dc0116627a93b18fbb260f0665ca0cbColin Cross#define error_errno(s, args...) error(s ": %s", ##args, strerror(errno)) 622ae7663e1e064000356ee9e49ebd08bdddc545f9Ken Sumrall#define critical_error(fmt, args...) do { fprintf(stderr, "critical error: %s: " fmt "\n", __func__, ## args); longjmp(setjmp_env, EXIT_FAILURE); } while (0) 63a7ed433f2dc0116627a93b18fbb260f0665ca0cbColin Cross#define critical_error_errno(s, args...) critical_error(s ": %s", ##args, strerror(errno)) 64ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross 65ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross#define EXT4_SUPER_MAGIC 0xEF53 66ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross#define EXT4_JNL_BACKUP_BLOCKS 1 67ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross 684605b3fb8a00fa37f617a8d0fe3a095d0503a845Raphael Moll#ifndef min /* already defined by windows.h */ 69ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross#define min(a, b) ((a) < (b) ? (a) : (b)) 704605b3fb8a00fa37f617a8d0fe3a095d0503a845Raphael Moll#endif 71ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross 72ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross#define DIV_ROUND_UP(x, y) (((x) + (y) - 1)/(y)) 736bd2b5d80db5630cb73e3e5a4be3b38afa241c5aColin Cross#define ALIGN(x, y) ((y) * DIV_ROUND_UP((x), (y))) 74ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross 75ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross#define __le64 u64 76ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross#define __le32 u32 77ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross#define __le16 u16 78ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross 79ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross#define __be64 u64 80ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross#define __be32 u32 81ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross#define __be16 u16 82ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross 83ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross#define __u64 u64 84ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross#define __u32 u32 85ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross#define __u16 u16 86ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross#define __u8 u8 87ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross 884df62f342dbbe2f5cca831ce789dc0426d32ec03Nick Kralevich/* XXX */ 894df62f342dbbe2f5cca831ce789dc0426d32ec03Nick Kralevich#define cpu_to_le32(x) (x) 904df62f342dbbe2f5cca831ce789dc0426d32ec03Nick Kralevich#define cpu_to_le16(x) (x) 914df62f342dbbe2f5cca831ce789dc0426d32ec03Nick Kralevich#define le32_to_cpu(x) (x) 924df62f342dbbe2f5cca831ce789dc0426d32ec03Nick Kralevich#define le16_to_cpu(x) (x) 934df62f342dbbe2f5cca831ce789dc0426d32ec03Nick Kralevich 94ec0a2e83dc66d67addeb90e83144187691852a3eColin Crosstypedef unsigned long long u64; 95435a8b61e925e3efb22fce08612efe210e83f791Ken Sumralltypedef signed long long s64; 96ec0a2e83dc66d67addeb90e83144187691852a3eColin Crosstypedef unsigned int u32; 97ec0a2e83dc66d67addeb90e83144187691852a3eColin Crosstypedef unsigned short int u16; 98ec0a2e83dc66d67addeb90e83144187691852a3eColin Crosstypedef unsigned char u8; 99ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross 100ec0a2e83dc66d67addeb90e83144187691852a3eColin Crossstruct block_group_info; 1014df62f342dbbe2f5cca831ce789dc0426d32ec03Nick Kralevichstruct xattr_list_element; 102ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross 103ec0a2e83dc66d67addeb90e83144187691852a3eColin Crossstruct ext2_group_desc { 104ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross __le32 bg_block_bitmap; 105ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross __le32 bg_inode_bitmap; 106ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross __le32 bg_inode_table; 107ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross __le16 bg_free_blocks_count; 108ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross __le16 bg_free_inodes_count; 109ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross __le16 bg_used_dirs_count; 11056497f28bd20001dd5f931208e8d948cf2f81b2fColin Cross __le16 bg_flags; 11156497f28bd20001dd5f931208e8d948cf2f81b2fColin Cross __le32 bg_reserved[2]; 11256497f28bd20001dd5f931208e8d948cf2f81b2fColin Cross __le16 bg_reserved16; 11356497f28bd20001dd5f931208e8d948cf2f81b2fColin Cross __le16 bg_checksum; 114ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross}; 115ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross 116ec0a2e83dc66d67addeb90e83144187691852a3eColin Crossstruct fs_info { 117435a8b61e925e3efb22fce08612efe210e83f791Ken Sumrall s64 len; /* If set to 0, ask the block device for the size, 118435a8b61e925e3efb22fce08612efe210e83f791Ken Sumrall * if less than 0, reserve that much space at the 119435a8b61e925e3efb22fce08612efe210e83f791Ken Sumrall * end of the partition, else use the size given. */ 120ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross u32 block_size; 121ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross u32 blocks_per_group; 122ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross u32 inodes_per_group; 123ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross u32 inode_size; 124ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross u32 inodes; 125ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross u32 journal_blocks; 126ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross u16 feat_ro_compat; 127ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross u16 feat_compat; 128ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross u16 feat_incompat; 12922742ce739a046a079b2e1b03342a25472dfa352Colin Cross u32 bg_desc_reserve_blocks; 130ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross const char *label; 131e4b5ae8ab07e698b95f004c9226000b02f853abcColin Cross u8 no_journal; 132f0ee37ffded79afdb03e15ae3a69969d2b7e6079Colin Cross 133f0ee37ffded79afdb03e15ae3a69969d2b7e6079Colin Cross struct sparse_file *sparse_file; 134ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross}; 135ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross 136ec0a2e83dc66d67addeb90e83144187691852a3eColin Crossstruct fs_aux_info { 137ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross struct ext4_super_block *sb; 138107a9f161babc20daf915311146b0e864d3b4157Ken Sumrall struct ext4_super_block **backup_sb; 139ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross struct ext2_group_desc *bg_desc; 140ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross struct block_group_info *bgs; 1414df62f342dbbe2f5cca831ce789dc0426d32ec03Nick Kralevich struct xattr_list_element *xattrs; 142ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross u32 first_data_block; 143ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross u64 len_blocks; 144ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross u32 inode_table_blocks; 145ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross u32 groups; 146ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross u32 bg_desc_blocks; 147ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross u32 default_i_flags; 148ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross u32 blocks_per_ind; 149ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross u32 blocks_per_dind; 150ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross u32 blocks_per_tind; 151ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross}; 152ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross 153ec0a2e83dc66d67addeb90e83144187691852a3eColin Crossextern struct fs_info info; 154ec0a2e83dc66d67addeb90e83144187691852a3eColin Crossextern struct fs_aux_info aux_info; 155ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross 1562ae7663e1e064000356ee9e49ebd08bdddc545f9Ken Sumrallextern jmp_buf setjmp_env; 1572ae7663e1e064000356ee9e49ebd08bdddc545f9Ken Sumrall 158ec0a2e83dc66d67addeb90e83144187691852a3eColin Crossstatic inline int log_2(int j) 159ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross{ 160ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross int i; 161ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross 162ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross for (i = 0; j > 0; i++) 163ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross j >>= 1; 164ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross 165ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross return i - 1; 166ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross} 167ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross 168881cca2f88ddcce86483b3ba95546b5641de8c0eColin Crossint ext4_bg_has_super_block(int bg); 169dc5abeee1e6fc4827ee0d5ece12aaed2dd56f4c7Colin Crossvoid write_ext4_image(int fd, int gz, int sparse, int crc); 170881cca2f88ddcce86483b3ba95546b5641de8c0eColin Crossvoid ext4_create_fs_aux_info(void); 171881cca2f88ddcce86483b3ba95546b5641de8c0eColin Crossvoid ext4_free_fs_aux_info(void); 172881cca2f88ddcce86483b3ba95546b5641de8c0eColin Crossvoid ext4_fill_in_sb(void); 173881cca2f88ddcce86483b3ba95546b5641de8c0eColin Crossvoid ext4_create_resize_inode(void); 174881cca2f88ddcce86483b3ba95546b5641de8c0eColin Crossvoid ext4_create_journal_inode(void); 175881cca2f88ddcce86483b3ba95546b5641de8c0eColin Crossvoid ext4_update_free(void); 176b781330b1acae2e5706bbda8d81e5f7575f40e2aColin Crossvoid ext4_queue_sb(void); 1770349bd9f14d252673a7a25767da4a80121aaaaf2Anatol Pomazauu64 get_file_size(int fd); 178881cca2f88ddcce86483b3ba95546b5641de8c0eColin Crossu64 parse_num(const char *arg); 179a7ed433f2dc0116627a93b18fbb260f0665ca0cbColin Crossvoid ext4_parse_sb(struct ext4_super_block *sb); 18056497f28bd20001dd5f931208e8d948cf2f81b2fColin Crossu16 ext4_crc16(u16 crc_in, const void *buf, int size); 181881cca2f88ddcce86483b3ba95546b5641de8c0eColin Cross 182965298695c981ee5a67e86977a8e40a50f7392abColin Crosstypedef void (*fs_config_func_t)(const char *path, int dir, unsigned *uid, unsigned *gid, 1834df62f342dbbe2f5cca831ce789dc0426d32ec03Nick Kralevich unsigned *mode, uint64_t *capabilities); 184965298695c981ee5a67e86977a8e40a50f7392abColin Cross 185965298695c981ee5a67e86977a8e40a50f7392abColin Crossstruct selabel_handle; 186965298695c981ee5a67e86977a8e40a50f7392abColin Cross 187965298695c981ee5a67e86977a8e40a50f7392abColin Crossint make_ext4fs_internal(int fd, const char *directory, 188965298695c981ee5a67e86977a8e40a50f7392abColin Cross const char *mountpoint, fs_config_func_t fs_config_func, int gzip, 18956497f28bd20001dd5f931208e8d948cf2f81b2fColin Cross int sparse, int crc, int wipe, 1902057370a2db739d8a7d8a475c9a0773efc3d91a0William Roberts struct selabel_handle *sehnd, int verbose); 191965298695c981ee5a67e86977a8e40a50f7392abColin Cross 192e8d74ff5c3253403d3e5c96edc80dfc3e5f8ada8Doug Zongker#ifdef __cplusplus 193e8d74ff5c3253403d3e5c96edc80dfc3e5f8ada8Doug Zongker} 194e8d74ff5c3253403d3e5c96edc80dfc3e5f8ada8Doug Zongker#endif 195e8d74ff5c3253403d3e5c96edc80dfc3e5f8ada8Doug Zongker 196ec0a2e83dc66d67addeb90e83144187691852a3eColin Cross#endif 197