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
15 struct 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 alloc_buffer;
24 int supported;
25 };
26
27 static inline void *squashfs_comp_opts(struct squashfs_sb_info *msblk,
28 void *buff, int length)
29 {
30 return msblk->decompressor->comp_opts ?
31 msblk->decompressor->comp_opts(msblk, buff, length) : NULL;
32 }
33
34 #ifdef CONFIG_SQUASHFS_XZ
35 extern const struct squashfs_decompressor squashfs_xz_comp_ops;
36 #endif
37
38 #ifdef CONFIG_SQUASHFS_LZ4
39 extern const struct squashfs_decompressor squashfs_lz4_comp_ops;
40 #endif
41
42 #ifdef CONFIG_SQUASHFS_LZO
43 extern const struct squashfs_decompressor squashfs_lzo_comp_ops;
44 #endif
45
46 #ifdef CONFIG_SQUASHFS_ZLIB
47 extern const struct squashfs_decompressor squashfs_zlib_comp_ops;
48 #endif
49
50 #ifdef CONFIG_SQUASHFS_ZSTD
51 extern const struct squashfs_decompressor squashfs_zstd_comp_ops;
52 #endif
53
54 #endif
55
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