SQUASHFS/squashfs-tools-4.4/squashfs-tools/mksquashfs.h

   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, 2019
   8  * Phillip Lougher <phillip@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 #ifdef REPRODUCIBLE_DEFAULT
 136 #define NOREP_STR
 137 #define REP_STR " (default)"
 138 #define REP_DEF 1
 139 #else
 140 #define NOREP_STR " (default)"
 141 #define REP_STR
 142 #define REP_DEF 0
 143 #endif
 144
 145 extern struct cache *reader_buffer, *fragment_buffer, *reserve_cache;
 146 struct cache *bwriter_buffer, *fwriter_buffer;
 147 extern struct queue *to_reader, *to_deflate, *to_writer, *from_writer,
 148         *to_frag, *locked_fragment, *to_process_frag;
 149 extern struct append_file **file_mapping;
 150 extern struct seq_queue *to_main, *to_order;
 151 extern pthread_mutex_t fragment_mutex, dup_mutex;
 152 extern struct squashfs_fragment_entry *fragment_table;
 153 extern struct compressor *comp;
 154 extern int block_size;
 155 extern struct file_info *dupl[];
 156 extern int read_fs_bytes(int, long long, int, void *);
 157 extern void add_file(long long, long long, long long, unsigned int *, int,
 158         unsigned int, int, int);
 159 extern struct id *create_id(unsigned int);
 160 extern unsigned int get_uid(unsigned int);
 161 extern unsigned int get_guid(unsigned int);
 162 extern int read_bytes(int, void *, int);
 163 extern unsigned short get_checksum_mem(char *, int);
 164 extern int reproducible;
 165 #endif