fs/squashfs/squashfs.h

   1 /*
   2  * Squashfs - a compressed read only filesystem for Linux
   3  *
   4  * Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008
   5  * Phillip Lougher <phillip@squashfs.org.uk>
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License
   9  * as published by the Free Software Foundation; either version 2,
  10  * or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  20  *
  21  * squashfs.h
  22  */
  23
  24 #define TRACE(s, args...)       pr_debug("SQUASHFS: "s, ## args)
  25
  26 #define ERROR(s, args...)       pr_err("SQUASHFS error: "s, ## args)
  27
  28 #define WARNING(s, args...)     pr_warn("SQUASHFS: "s, ## args)
  29
  30 /* block.c */
  31 extern int squashfs_read_data(struct super_block *, u64, int, u64 *,
  32                                 struct squashfs_page_actor *);
  33
  34 /* cache.c */
  35 extern struct squashfs_cache *squashfs_cache_init(char *, int, int);
  36 extern void squashfs_cache_delete(struct squashfs_cache *);
  37 extern struct squashfs_cache_entry *squashfs_cache_get(struct super_block *,
  38                                 struct squashfs_cache *, u64, int);
  39 extern void squashfs_cache_put(struct squashfs_cache_entry *);
  40 extern int squashfs_copy_data(void *, struct squashfs_cache_entry *, int, int);
  41 extern int squashfs_read_metadata(struct super_block *, void *, u64 *,
  42                                 int *, int);
  43 extern struct squashfs_cache_entry *squashfs_get_fragment(struct super_block *,
  44                                 u64, int);
  45 extern struct squashfs_cache_entry *squashfs_get_datablock(struct super_block *,
  46                                 u64, int);
  47 extern void *squashfs_read_table(struct super_block *, u64, int);
  48
  49 /* decompressor.c */
  50 extern const struct squashfs_decompressor *squashfs_lookup_decompressor(int);
  51 extern void *squashfs_decompressor_setup(struct super_block *, unsigned short);
  52
  53 /* decompressor_xxx.c */
  54 extern void *squashfs_decompressor_create(struct squashfs_sb_info *, void *);
  55 extern void squashfs_decompressor_destroy(struct squashfs_sb_info *);
  56 extern int squashfs_decompress(struct squashfs_sb_info *, struct buffer_head **,
  57         int, int, int, struct squashfs_page_actor *);
  58 extern int squashfs_max_decompressors(void);
  59
  60 /* export.c */
  61 extern __le64 *squashfs_read_inode_lookup_table(struct super_block *, u64, u64,
  62                                 unsigned int);
  63
  64 /* fragment.c */
  65 extern int squashfs_frag_lookup(struct super_block *, unsigned int, u64 *);
  66 extern __le64 *squashfs_read_fragment_index_table(struct super_block *,
  67                                 u64, u64, unsigned int);
  68
  69 /* file.c */
  70 void squashfs_fill_page(struct page *, struct squashfs_cache_entry *, int, int);
  71 void squashfs_copy_cache(struct page *, struct squashfs_cache_entry *, int,
  72                                 int);
  73
  74 /* file_xxx.c */
  75 extern int squashfs_readpage_block(struct page *, u64, int, int);
  76
  77 /* id.c */
  78 extern int squashfs_get_id(struct super_block *, unsigned int, unsigned int *);
  79 extern __le64 *squashfs_read_id_index_table(struct super_block *, u64, u64,
  80                                 unsigned short);
  81
  82 /* inode.c */
  83 extern struct inode *squashfs_iget(struct super_block *, long long,
  84                                 unsigned int);
  85 extern int squashfs_read_inode(struct inode *, long long);
  86
  87 /* xattr.c */
  88 extern ssize_t squashfs_listxattr(struct dentry *, char *, size_t);
  89
  90 /*
  91  * Inodes, files,  decompressor and xattr operations
  92  */
  93
  94 /* dir.c */
  95 extern const struct file_operations squashfs_dir_ops;
  96
  97 /* export.c */
  98 extern const struct export_operations squashfs_export_ops;
  99
 100 /* file.c */
 101 extern const struct address_space_operations squashfs_aops;
 102
 103 /* inode.c */
 104 extern const struct inode_operations squashfs_inode_ops;
 105
 106 /* namei.c */
 107 extern const struct inode_operations squashfs_dir_inode_ops;
 108
 109 /* symlink.c */
 110 extern const struct address_space_operations squashfs_symlink_aops;
 111 extern const struct inode_operations squashfs_symlink_inode_ops;
 112
 113 /* xattr.c */
 114 extern const struct xattr_handler *squashfs_xattr_handlers[];