Google Git
Sign in
android-kvm / linux / 56c94c626785001dbb683312725b7d87c6ec6a91 / . / fs / squashfs / squashfs.h
blob: 5a756e6790b5b75705c5c0d8a22fa99463a13b29 [file] [log] [blame]
Thomas Gleixner68252eb2019-05-20 19:08:00 +0200[diff] [blame]1/* SPDX-License-Identifier: GPL-2.0-or-later */
Phillip Lougherffae2cd2009-01-05 08:46:27 +0000[diff] [blame]2/*
3 * Squashfs - a compressed read only filesystem for Linux
4 *
5 * Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008
Phillip Lougherd7f2ff62011-05-26 10:39:56 +0100[diff] [blame]6 * Phillip Lougher <phillip@squashfs.org.uk>
Phillip Lougherffae2cd2009-01-05 08:46:27 +0000[diff] [blame]7 *
Phillip Lougherffae2cd2009-01-05 08:46:27 +0000[diff] [blame]8 * squashfs.h
9 */
10
11#define TRACE(s, args...) pr_debug("SQUASHFS: "s, ## args)
12
13#define ERROR(s, args...) pr_err("SQUASHFS error: "s, ## args)
14
Fabian Frederick22010832014-06-04 16:05:52 -0700[diff] [blame]15#define WARNING(s, args...) pr_warn("SQUASHFS: "s, ## args)
Phillip Lougherffae2cd2009-01-05 08:46:27 +0000[diff] [blame]16
Phillip Lougherffae2cd2009-01-05 08:46:27 +0000[diff] [blame]17/* block.c */
Phillip Lougher846b7302013-11-18 02:59:12 +0000[diff] [blame]18extern int squashfs_read_data(struct super_block *, u64, int, u64 *,
19 struct squashfs_page_actor *);
Phillip Lougherffae2cd2009-01-05 08:46:27 +0000[diff] [blame]20
21/* cache.c */
22extern struct squashfs_cache *squashfs_cache_init(char *, int, int);
23extern void squashfs_cache_delete(struct squashfs_cache *);
24extern struct squashfs_cache_entry *squashfs_cache_get(struct super_block *,
25 struct squashfs_cache *, u64, int);
26extern void squashfs_cache_put(struct squashfs_cache_entry *);
27extern int squashfs_copy_data(void *, struct squashfs_cache_entry *, int, int);
28extern int squashfs_read_metadata(struct super_block *, void *, u64 *,
29 int *, int);
30extern struct squashfs_cache_entry *squashfs_get_fragment(struct super_block *,
31 u64, int);
32extern struct squashfs_cache_entry *squashfs_get_datablock(struct super_block *,
33 u64, int);
Phillip Lougher82de6472011-05-20 02:26:43 +0100[diff] [blame]34extern void *squashfs_read_table(struct super_block *, u64, int);
Phillip Lougherffae2cd2009-01-05 08:46:27 +0000[diff] [blame]35
Phillip Lougher4c0f0bb2009-10-06 04:04:15 +0100[diff] [blame]36/* decompressor.c */
37extern const struct squashfs_decompressor *squashfs_lookup_decompressor(int);
Phillip Lougher9508c6b2013-11-13 02:56:26 +0000[diff] [blame]38extern void *squashfs_decompressor_setup(struct super_block *, unsigned short);
39
40/* decompressor_xxx.c */
Xiaoming Ni80f784092022-10-19 11:09:29 +0800[diff] [blame]41
42struct 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);
48};
49
50#ifdef CONFIG_SQUASHFS_DECOMP_SINGLE
51extern const struct squashfs_decompressor_thread_ops squashfs_decompressor_single;
52#endif
53#ifdef CONFIG_SQUASHFS_DECOMP_MULTI
54extern const struct squashfs_decompressor_thread_ops squashfs_decompressor_multi;
55#endif
56#ifdef CONFIG_SQUASHFS_DECOMP_MULTI_PERCPU
57extern const struct squashfs_decompressor_thread_ops squashfs_decompressor_percpu;
58#endif
Phillip Lougher4c0f0bb2009-10-06 04:04:15 +0100[diff] [blame]59
Phillip Lougherffae2cd2009-01-05 08:46:27 +0000[diff] [blame]60/* export.c */
Phillip Lougherac51a0a2011-05-24 04:15:21 +0100[diff] [blame]61extern __le64 *squashfs_read_inode_lookup_table(struct super_block *, u64, u64,
Phillip Lougherffae2cd2009-01-05 08:46:27 +0000[diff] [blame]62 unsigned int);
63
64/* fragment.c */
65extern int squashfs_frag_lookup(struct super_block *, unsigned int, u64 *);
66extern __le64 *squashfs_read_fragment_index_table(struct super_block *,
Phillip Lougher1cac63c2011-05-24 04:33:34 +0100[diff] [blame]67 u64, u64, unsigned int);
Phillip Lougherffae2cd2009-01-05 08:46:27 +0000[diff] [blame]68
Phillip Lougher5f55dbc2013-10-31 19:24:27 +0000[diff] [blame]69/* file.c */
Linus Torvaldscdbb65c2018-08-01 10:38:43 -0700[diff] [blame]70void squashfs_fill_page(struct page *, struct squashfs_cache_entry *, int, int);
Phillip Lougher5f55dbc2013-10-31 19:24:27 +0000[diff] [blame]71void squashfs_copy_cache(struct page *, struct squashfs_cache_entry *, int,
72 int);
73
74/* file_xxx.c */
Phillip Loughera3f94cb2018-08-02 16:45:15 +0100[diff] [blame]75extern int squashfs_readpage_block(struct page *, u64, int, int);
Phillip Lougher5f55dbc2013-10-31 19:24:27 +0000[diff] [blame]76
Phillip Lougherffae2cd2009-01-05 08:46:27 +0000[diff] [blame]77/* id.c */
78extern int squashfs_get_id(struct super_block *, unsigned int, unsigned int *);
Phillip Lougher37986f62011-05-24 04:05:22 +0100[diff] [blame]79extern __le64 *squashfs_read_id_index_table(struct super_block *, u64, u64,
Phillip Lougherffae2cd2009-01-05 08:46:27 +0000[diff] [blame]80 unsigned short);
81
82/* inode.c */
83extern struct inode *squashfs_iget(struct super_block *, long long,
84 unsigned int);
85extern int squashfs_read_inode(struct inode *, long long);
86
Phillip Lougher67f66cc2010-05-17 04:06:56 +0100[diff] [blame]87/* xattr.c */
88extern ssize_t squashfs_listxattr(struct dentry *, char *, size_t);
89
Phillip Lougherffae2cd2009-01-05 08:46:27 +0000[diff] [blame]90/*
Phillip Lougher67f66cc2010-05-17 04:06:56 +0100[diff] [blame]91 * Inodes, files, decompressor and xattr operations
Phillip Lougherffae2cd2009-01-05 08:46:27 +0000[diff] [blame]92 */
93
94/* dir.c */
95extern const struct file_operations squashfs_dir_ops;
96
97/* export.c */
98extern const struct export_operations squashfs_export_ops;
99
100/* file.c */
101extern const struct address_space_operations squashfs_aops;
102
Phillip Lougher67f66cc2010-05-17 04:06:56 +0100[diff] [blame]103/* inode.c */
104extern const struct inode_operations squashfs_inode_ops;
105
Phillip Lougherffae2cd2009-01-05 08:46:27 +0000[diff] [blame]106/* namei.c */
107extern const struct inode_operations squashfs_dir_inode_ops;
108
109/* symlink.c */
110extern const struct address_space_operations squashfs_symlink_aops;
Phillip Lougher67f66cc2010-05-17 04:06:56 +0100[diff] [blame]111extern const struct inode_operations squashfs_symlink_inode_ops;
112
113/* xattr.c */
Wedson Almeida Filhoc08a8312023-09-30 02:00:28 -0300[diff] [blame]114extern const struct xattr_handler * const squashfs_xattr_handlers[];