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 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