1 /* SPDX-License-Identifier: GPL-2.0-or-later * <<
2 #ifndef DECOMPRESSOR_H 1 #ifndef DECOMPRESSOR_H
3 #define DECOMPRESSOR_H 2 #define DECOMPRESSOR_H
4 /* 3 /*
5 * Squashfs - a compressed read only filesyste 4 * Squashfs - a compressed read only filesystem for Linux
6 * 5 *
7 * Copyright (c) 2002, 2003, 2004, 2005, 2006, 6 * Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
8 * Phillip Lougher <phillip@squashfs.org.uk> 7 * Phillip Lougher <phillip@squashfs.org.uk>
9 * 8 *
>> 9 * This program is free software; you can redistribute it and/or
>> 10 * modify it under the terms of the GNU General Public License
>> 11 * as published by the Free Software Foundation; either version 2,
>> 12 * or (at your option) any later version.
>> 13 *
>> 14 * This program is distributed in the hope that it will be useful,
>> 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
>> 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
>> 17 * GNU General Public License for more details.
>> 18 *
>> 19 * You should have received a copy of the GNU General Public License
>> 20 * along with this program; if not, write to the Free Software
>> 21 * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
>> 22 *
10 * decompressor.h 23 * decompressor.h
11 */ 24 */
12 25
13 #include <linux/bio.h> <<
14 <<
15 struct squashfs_decompressor { 26 struct squashfs_decompressor {
16 void *(*init)(struct squashfs_sb_in 27 void *(*init)(struct squashfs_sb_info *, void *);
17 void *(*comp_opts)(struct squashfs_ 28 void *(*comp_opts)(struct squashfs_sb_info *, void *, int);
18 void (*free)(void *); 29 void (*free)(void *);
19 int (*decompress)(struct squashfs_ 30 int (*decompress)(struct squashfs_sb_info *, void *,
20 struct bio *, int, int, struct !! 31 struct buffer_head **, int, int, int,
>> 32 struct squashfs_page_actor *);
21 int id; 33 int id;
22 char *name; 34 char *name;
23 int alloc_buffer; <<
24 int supported; 35 int supported;
25 }; 36 };
26 37
27 static inline void *squashfs_comp_opts(struct 38 static inline void *squashfs_comp_opts(struct squashfs_sb_info *msblk,
28 39 void *buff, int length)
29 { 40 {
30 return msblk->decompressor->comp_opts 41 return msblk->decompressor->comp_opts ?
31 msblk->decompressor->comp_opts 42 msblk->decompressor->comp_opts(msblk, buff, length) : NULL;
32 } 43 }
33 44
34 #ifdef CONFIG_SQUASHFS_XZ 45 #ifdef CONFIG_SQUASHFS_XZ
35 extern const struct squashfs_decompressor squa 46 extern const struct squashfs_decompressor squashfs_xz_comp_ops;
36 #endif 47 #endif
37 48
38 #ifdef CONFIG_SQUASHFS_LZ4 49 #ifdef CONFIG_SQUASHFS_LZ4
39 extern const struct squashfs_decompressor squa 50 extern const struct squashfs_decompressor squashfs_lz4_comp_ops;
40 #endif 51 #endif
41 52
42 #ifdef CONFIG_SQUASHFS_LZO 53 #ifdef CONFIG_SQUASHFS_LZO
43 extern const struct squashfs_decompressor squa 54 extern const struct squashfs_decompressor squashfs_lzo_comp_ops;
44 #endif 55 #endif
45 56
46 #ifdef CONFIG_SQUASHFS_ZLIB 57 #ifdef CONFIG_SQUASHFS_ZLIB
47 extern const struct squashfs_decompressor squa 58 extern const struct squashfs_decompressor squashfs_zlib_comp_ops;
48 #endif 59 #endif
49 60
50 #ifdef CONFIG_SQUASHFS_ZSTD 61 #ifdef CONFIG_SQUASHFS_ZSTD
51 extern const struct squashfs_decompressor squa 62 extern const struct squashfs_decompressor squashfs_zstd_comp_ops;
52 #endif 63 #endif
53 64
54 #endif 65 #endif
55 66
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