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 struct squashfs_decompressor {
14 void *(*init)(struct squashfs_sb_info *, void *);
15 void *(*comp_opts)(struct squashfs_sb_info *, void *, int);
16 void (*free)(void *);
17 int (*decompress)(struct squashfs_sb_info *, void *,
18 struct buffer_head **, int, int, int,
19 struct squashfs_page_actor *);
20 int id;
21 char *name;
22 int supported;
23 };
24
squashfs_comp_opts(struct squashfs_sb_info * msblk,void * buff,int length)25 static inline void *squashfs_comp_opts(struct squashfs_sb_info *msblk,
26 void *buff, int length)
27 {
28 return msblk->decompressor->comp_opts ?
29 msblk->decompressor->comp_opts(msblk, buff, length) : NULL;
30 }
31
32 #ifdef CONFIG_SQUASHFS_XZ
33 extern const struct squashfs_decompressor squashfs_xz_comp_ops;
34 #endif
35
36 #ifdef CONFIG_SQUASHFS_LZ4
37 extern const struct squashfs_decompressor squashfs_lz4_comp_ops;
38 #endif
39
40 #ifdef CONFIG_SQUASHFS_LZO
41 extern const struct squashfs_decompressor squashfs_lzo_comp_ops;
42 #endif
43
44 #ifdef CONFIG_SQUASHFS_ZLIB
45 extern const struct squashfs_decompressor squashfs_zlib_comp_ops;
46 #endif
47
48 #ifdef CONFIG_SQUASHFS_ZSTD
49 extern const struct squashfs_decompressor squashfs_zstd_comp_ops;
50 #endif
51
52 #endif
53