1 /* SPDX-License-Identifier: GPL-2.0-or-later */
3 * Squashfs - a compressed read only filesystem for Linux
5 * Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008
6 * Phillip Lougher <phillip@squashfs.org.uk>
11 #define TRACE(s, args...) pr_debug("SQUASHFS: "s, ## args)
13 #define ERROR(s, args...) pr_err("SQUASHFS error: "s, ## args)
15 #define WARNING(s, args...) pr_warn("SQUASHFS: "s, ## args)
18 extern int squashfs_read_data(struct super_block *, u64, int, u64 *,
19 struct squashfs_page_actor *);
22 extern struct squashfs_cache *squashfs_cache_init(char *, int, int);
23 extern void squashfs_cache_delete(struct squashfs_cache *);
24 extern struct squashfs_cache_entry *squashfs_cache_get(struct super_block *,
25 struct squashfs_cache *, u64, int);
26 extern void squashfs_cache_put(struct squashfs_cache_entry *);
27 extern int squashfs_copy_data(void *, struct squashfs_cache_entry *, int, int);
28 extern int squashfs_read_metadata(struct super_block *, void *, u64 *,
30 extern struct squashfs_cache_entry *squashfs_get_fragment(struct super_block *,
32 extern struct squashfs_cache_entry *squashfs_get_datablock(struct super_block *,
34 extern void *squashfs_read_table(struct super_block *, u64, int);
37 extern const struct squashfs_decompressor *squashfs_lookup_decompressor(int);
38 extern void *squashfs_decompressor_setup(struct super_block *, unsigned short);
40 /* decompressor_xxx.c */
42 struct squashfs_decompressor_thread_ops {
43 void * (*create)(struct squashfs_sb_info *msblk, void *comp_opts);
44 void (*destroy)(struct squashfs_sb_info *msblk);
45 int (*decompress)(struct squashfs_sb_info *msblk, struct bio *bio,
46 int offset, int length, struct squashfs_page_actor *output);
47 int (*max_decompressors)(void);
50 #ifdef CONFIG_SQUASHFS_DECOMP_SINGLE
51 extern const struct squashfs_decompressor_thread_ops squashfs_decompressor_single;
53 #ifdef CONFIG_SQUASHFS_DECOMP_MULTI
54 extern const struct squashfs_decompressor_thread_ops squashfs_decompressor_multi;
56 #ifdef CONFIG_SQUASHFS_DECOMP_MULTI_PERCPU
57 extern const struct squashfs_decompressor_thread_ops squashfs_decompressor_percpu;
61 extern __le64 *squashfs_read_inode_lookup_table(struct super_block *, u64, u64,
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);
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,
75 extern int squashfs_readpage_block(struct page *, u64, int, int);
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,
83 extern struct inode *squashfs_iget(struct super_block *, long long,
85 extern int squashfs_read_inode(struct inode *, long long);
88 extern ssize_t squashfs_listxattr(struct dentry *, char *, size_t);
91 * Inodes, files, decompressor and xattr operations
95 extern const struct file_operations squashfs_dir_ops;
98 extern const struct export_operations squashfs_export_ops;
101 extern const struct address_space_operations squashfs_aops;
104 extern const struct inode_operations squashfs_inode_ops;
107 extern const struct inode_operations squashfs_dir_inode_ops;
110 extern const struct address_space_operations squashfs_symlink_aops;
111 extern const struct inode_operations squashfs_symlink_inode_ops;
114 extern const struct xattr_handler *squashfs_xattr_handlers[];