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 alloc_buffer; 24 int supported; 25}; 26 27static 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 35extern const struct squashfs_decompressor squashfs_xz_comp_ops; 36#endif 37 38#ifdef CONFIG_SQUASHFS_LZ4 39extern const struct squashfs_decompressor squashfs_lz4_comp_ops; 40#endif 41 42#ifdef CONFIG_SQUASHFS_LZO 43extern const struct squashfs_decompressor squashfs_lzo_comp_ops; 44#endif 45 46#ifdef CONFIG_SQUASHFS_ZLIB 47extern const struct squashfs_decompressor squashfs_zlib_comp_ops; 48#endif 49 50#ifdef CONFIG_SQUASHFS_ZSTD 51extern const struct squashfs_decompressor squashfs_zstd_comp_ops; 52#endif 53 54#endif 55