fs/squashfs/decompressor.h

   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