usr/src/uts/common/fs/zfs/sys/zio_compress.h

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21
  22 /*
  23  * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26 /*
  27  * Copyright (c) 2013 by Saso Kiselkov. All rights reserved.
  28  */
  29
  30 #ifndef _SYS_ZIO_COMPRESS_H
  31 #define _SYS_ZIO_COMPRESS_H
  32
  33 #include <sys/zio.h>
  34
  35 #ifdef  __cplusplus
  36 extern "C" {
  37 #endif
  38
  39 /* Common signature for all zio compress functions. */
  40 typedef size_t zio_compress_func_t(void *src, void *dst,
  41     size_t s_len, size_t d_len, int);
  42 /* Common signature for all zio decompress functions. */
  43 typedef int zio_decompress_func_t(void *src, void *dst,
  44     size_t s_len, size_t d_len, int);
  45
  46 /*
  47  * Information about each compression function.
  48  */
  49 typedef struct zio_compress_info {
  50         zio_compress_func_t     *ci_compress;   /* compression function */
  51         zio_decompress_func_t   *ci_decompress; /* decompression function */
  52         int                     ci_level;       /* level parameter */
  53         char                    *ci_name;       /* algorithm name */
  54 } zio_compress_info_t;
  55
  56 extern zio_compress_info_t zio_compress_table[ZIO_COMPRESS_FUNCTIONS];
  57
  58 /*
  59  * Compression routines.
  60  */
  61 extern size_t lzjb_compress(void *src, void *dst, size_t s_len, size_t d_len,
  62     int level);
  63 extern int lzjb_decompress(void *src, void *dst, size_t s_len, size_t d_len,
  64     int level);
  65 extern size_t gzip_compress(void *src, void *dst, size_t s_len, size_t d_len,
  66     int level);
  67 extern int gzip_decompress(void *src, void *dst, size_t s_len, size_t d_len,
  68     int level);
  69 extern size_t zle_compress(void *src, void *dst, size_t s_len, size_t d_len,
  70     int level);
  71 extern int zle_decompress(void *src, void *dst, size_t s_len, size_t d_len,
  72     int level);
  73 extern size_t lz4_compress(void *src, void *dst, size_t s_len, size_t d_len,
  74     int level);
  75 extern int lz4_decompress(void *src, void *dst, size_t s_len, size_t d_len,
  76     int level);
  77
  78 /*
  79  * Compress and decompress data if necessary.
  80  */
  81 extern size_t zio_compress_data(enum zio_compress c, void *src, void *dst,
  82     size_t s_len);
  83 extern int zio_decompress_data(enum zio_compress c, void *src, void *dst,
  84     size_t s_len, size_t d_len);
  85
  86 #ifdef  __cplusplus
  87 }
  88 #endif
  89
  90 #endif  /* _SYS_ZIO_COMPRESS_H */