1 #ifndef MKSQUASHFS_H 2 #define MKSQUASHFS_H 3 /* 4 * Squashfs 5 * 6 * Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 7 * 2012, 2013, 2014 8 * Phillip Lougher <phillip (at) squashfs.org.uk> 9 * 10 * This program is free software; you can redistribute it and/or 11 * modify it under the terms of the GNU General Public License 12 * as published by the Free Software Foundation; either version 2, 13 * or (at your option) any later version. 14 * 15 * This program is distributed in the hope that it will be useful, 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18 * GNU General Public License for more details. 19 * 20 * You should have received a copy of the GNU General Public License 21 * along with this program; if not, write to the Free Software 22 * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 23 * 24 * mksquashfs.h 25 * 26 */ 27 28 struct dir_info { 29 char *pathname; 30 char *subpath; 31 unsigned int count; 32 unsigned int directory_count; 33 int depth; 34 unsigned int excluded; 35 char dir_is_ldir; 36 struct dir_ent *dir_ent; 37 struct dir_ent *list; 38 DIR *linuxdir; 39 }; 40 41 struct dir_ent { 42 char *name; 43 char *source_name; 44 char *nonstandard_pathname; 45 struct inode_info *inode; 46 struct dir_info *dir; 47 struct dir_info *our_dir; 48 struct dir_ent *next; 49 }; 50 51 struct inode_info { 52 struct stat buf; 53 struct inode_info *next; 54 squashfs_inode inode; 55 unsigned int inode_number; 56 unsigned int nlink; 57 int pseudo_id; 58 char type; 59 char read; 60 char root_entry; 61 char pseudo_file; 62 char no_fragments; 63 char always_use_fragments; 64 char noD; 65 char noF; 66 char symlink[0]; 67 }; 68 69 /* in memory file info */ 70 struct file_info { 71 long long file_size; 72 long long bytes; 73 long long start; 74 unsigned int *block_list; 75 struct file_info *next; 76 struct fragment *fragment; 77 unsigned short checksum; 78 unsigned short fragment_checksum; 79 char have_frag_checksum; 80 char have_checksum; 81 }; 82 83 /* fragment block data structures */ 84 struct fragment { 85 unsigned int index; 86 int offset; 87 int size; 88 }; 89 90 /* in memory uid tables */ 91 #define ID_ENTRIES 256 92 #define ID_HASH(id) (id & (ID_ENTRIES - 1)) 93 #define ISA_UID 1 94 #define ISA_GID 2 95 96 struct id { 97 unsigned int id; 98 int index; 99 char flags; 100 struct id *next; 101 }; 102 103 /* fragment to file mapping used when appending */ 104 struct append_file { 105 struct file_info *file; 106 struct append_file *next; 107 }; 108 109 #define PSEUDO_FILE_OTHER 1 110 #define PSEUDO_FILE_PROCESS 2 111 112 #define IS_PSEUDO(a) ((a)->pseudo_file) 113 #define IS_PSEUDO_PROCESS(a) ((a)->pseudo_file & PSEUDO_FILE_PROCESS) 114 #define IS_PSEUDO_OTHER(a) ((a)->pseudo_file & PSEUDO_FILE_OTHER) 115 116 /* 117 * Amount of physical memory to use by default, and the default queue 118 * ratios 119 */ 120 #define SQUASHFS_TAKE 4 121 #define SQUASHFS_READQ_MEM 4 122 #define SQUASHFS_BWRITEQ_MEM 4 123 #define SQUASHFS_FWRITEQ_MEM 4 124 125 /* 126 * Lowest amount of physical memory considered viable for Mksquashfs 127 * to run in Mbytes 128 */ 129 #define SQUASHFS_LOWMEM 64 130 131 /* offset of data in compressed metadata blocks (allowing room for 132 * compressed size */ 133 #define BLOCK_OFFSET 2 134 135 extern struct cache *reader_buffer, *fragment_buffer, *reserve_cache; 136 struct cache *bwriter_buffer, *fwriter_buffer; 137 extern struct queue *to_reader, *to_deflate, *to_writer, *from_writer, 138 *to_frag, *locked_fragment, *to_process_frag; 139 extern struct append_file **file_mapping; 140 extern struct seq_queue *to_main; 141 extern pthread_mutex_t fragment_mutex, dup_mutex; 142 extern struct squashfs_fragment_entry *fragment_table; 143 extern struct compressor *comp; 144 extern int block_size; 145 extern struct file_info *dupl[]; 146 extern int read_fs_bytes(int, long long, int, void *); 147 extern void add_file(long long, long long, long long, unsigned int *, int, 148 unsigned int, int, int); 149 extern struct id *create_id(unsigned int); 150 extern unsigned int get_uid(unsigned int); 151 extern unsigned int get_guid(unsigned int); 152 extern int read_bytes(int, void *, int); 153 extern unsigned short get_checksum_mem(char *, int); 154 #endif 155
