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_init_read_wq(void); 32 extern void squashfs_destroy_read_wq(void); 33 extern int squashfs_read_data(struct super_block *, u64, int, u64 *, 34 struct squashfs_page_actor *); 35 extern int squashfs_read_data_async(struct super_block *, u64, int, u64 *, 36 struct squashfs_page_actor *); 37 38 /* cache.c */ 39 extern struct squashfs_cache *squashfs_cache_init(char *, int, int); 40 extern void squashfs_cache_delete(struct squashfs_cache *); 41 extern struct squashfs_cache_entry *squashfs_cache_get(struct super_block *, 42 struct squashfs_cache *, u64, int); 43 extern void squashfs_cache_put(struct squashfs_cache_entry *); 44 extern int squashfs_copy_data(void *, struct squashfs_cache_entry *, int, int); 45 extern int squashfs_read_metadata(struct super_block *, void *, u64 *, 46 int *, int); 47 extern struct squashfs_cache_entry *squashfs_get_fragment(struct super_block *, 48 u64, int); 49 extern struct squashfs_cache_entry *squashfs_get_datablock(struct super_block *, 50 u64, int); 51 extern void *squashfs_read_table(struct super_block *, u64, int); 52 53 /* decompressor.c */ 54 extern const struct squashfs_decompressor *squashfs_lookup_decompressor(int); 55 extern void *squashfs_decompressor_setup(struct super_block *, unsigned short); 56 57 /* decompressor_xxx.c */ 58 extern void *squashfs_decompressor_create(struct squashfs_sb_info *, void *); 59 extern void squashfs_decompressor_destroy(struct squashfs_sb_info *); 60 extern int squashfs_decompress(struct squashfs_sb_info *, struct buffer_head **, 61 int, int, int, struct squashfs_page_actor *); 62 extern int squashfs_max_decompressors(void); 63 64 /* export.c */ 65 extern __le64 *squashfs_read_inode_lookup_table(struct super_block *, u64, u64, 66 unsigned int); 67 68 /* fragment.c */ 69 extern int squashfs_frag_lookup(struct super_block *, unsigned int, u64 *); 70 extern __le64 *squashfs_read_fragment_index_table(struct super_block *, 71 u64, u64, unsigned int); 72 73 /* file.c */ 74 void squashfs_copy_cache(struct page *, struct squashfs_cache_entry *, int, 75 int); 76 77 /* file_direct.c */ 78 extern int squashfs_readpages_block(struct page *, struct list_head *, 79 unsigned int *, struct address_space *, int, u64, int); 80 81 /* id.c */ 82 extern int squashfs_get_id(struct super_block *, unsigned int, unsigned int *); 83 extern __le64 *squashfs_read_id_index_table(struct super_block *, u64, u64, 84 unsigned short); 85 86 /* inode.c */ 87 extern struct inode *squashfs_iget(struct super_block *, long long, 88 unsigned int); 89 extern int squashfs_read_inode(struct inode *, long long); 90 91 /* xattr.c */ 92 extern ssize_t squashfs_listxattr(struct dentry *, char *, size_t); 93 94 /* 95 * Inodes, files, decompressor and xattr operations 96 */ 97 98 /* dir.c */ 99 extern const struct file_operations squashfs_dir_ops; 100 101 /* export.c */ 102 extern const struct export_operations squashfs_export_ops; 103 104 /* file.c */ 105 extern const struct address_space_operations squashfs_aops; 106 107 /* inode.c */ 108 extern const struct inode_operations squashfs_inode_ops; 109 110 /* namei.c */ 111 extern const struct inode_operations squashfs_dir_inode_ops; 112 113 /* symlink.c */ 114 extern const struct address_space_operations squashfs_symlink_aops; 115 extern const struct inode_operations squashfs_symlink_inode_ops; 116 117 /* xattr.c */ 118 extern const struct xattr_handler *squashfs_xattr_handlers[]; 119