1/* SPDX-License-Identifier: GPL-2.0-or-later */
2#ifndef DECOMPRESSOR_H
3#define DECOMPRESSOR_H
4/*
5 * Squashfs - a compressed read only filesystem for Linux
6 *
7 * Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
8 * Phillip Lougher <phillip@squashfs.org.uk>
9 *
10 * decompressor.h
11 */
12
13#include <linux/bio.h>
14
15struct squashfs_decompressor {
16	void	*(*init)(struct squashfs_sb_info *, void *);
17	void	*(*comp_opts)(struct squashfs_sb_info *, void *, int);
18	void	(*free)(void *);
19	int	(*decompress)(struct squashfs_sb_info *, void *,
20		struct bio *, int, int, struct squashfs_page_actor *);
21	int	id;
22	char	*name;
23	int	supported;
24};
25
26static inline void *squashfs_comp_opts(struct squashfs_sb_info *msblk,
27							void *buff, int length)
28{
29	return msblk->decompressor->comp_opts ?
30		msblk->decompressor->comp_opts(msblk, buff, length) : NULL;
31}
32
33#ifdef CONFIG_SQUASHFS_XZ
34extern const struct squashfs_decompressor squashfs_xz_comp_ops;
35#endif
36
37#ifdef CONFIG_SQUASHFS_LZ4
38extern const struct squashfs_decompressor squashfs_lz4_comp_ops;
39#endif
40
41#ifdef CONFIG_SQUASHFS_LZO
42extern const struct squashfs_decompressor squashfs_lzo_comp_ops;
43#endif
44
45#ifdef CONFIG_SQUASHFS_ZLIB
46extern const struct squashfs_decompressor squashfs_zlib_comp_ops;
47#endif
48
49#ifdef CONFIG_SQUASHFS_ZSTD
50extern const struct squashfs_decompressor squashfs_zstd_comp_ops;
51#endif
52
53#endif
54