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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 | * Copyright (c) 2015, 2016 by Delphix. All rights reserved. | |
26 | */ | |
27 | ||
28 | #ifndef _SYS_ZIO_COMPRESS_H | |
29 | #define _SYS_ZIO_COMPRESS_H | |
30 | ||
31 | #include <sys/abd.h> | |
32 | ||
33 | #ifdef __cplusplus | |
34 | extern "C" { | |
35 | #endif | |
36 | ||
37 | enum zio_compress { | |
38 | ZIO_COMPRESS_INHERIT = 0, | |
39 | ZIO_COMPRESS_ON, | |
40 | ZIO_COMPRESS_OFF, | |
41 | ZIO_COMPRESS_LZJB, | |
42 | ZIO_COMPRESS_EMPTY, | |
43 | ZIO_COMPRESS_GZIP_1, | |
44 | ZIO_COMPRESS_GZIP_2, | |
45 | ZIO_COMPRESS_GZIP_3, | |
46 | ZIO_COMPRESS_GZIP_4, | |
47 | ZIO_COMPRESS_GZIP_5, | |
48 | ZIO_COMPRESS_GZIP_6, | |
49 | ZIO_COMPRESS_GZIP_7, | |
50 | ZIO_COMPRESS_GZIP_8, | |
51 | ZIO_COMPRESS_GZIP_9, | |
52 | ZIO_COMPRESS_ZLE, | |
53 | ZIO_COMPRESS_LZ4, | |
54 | ZIO_COMPRESS_FUNCTIONS | |
55 | }; | |
56 | ||
57 | /* Common signature for all zio compress functions. */ | |
58 | typedef size_t zio_compress_func_t(void *src, void *dst, | |
59 | size_t s_len, size_t d_len, int); | |
60 | /* Common signature for all zio decompress functions. */ | |
61 | typedef int zio_decompress_func_t(void *src, void *dst, | |
62 | size_t s_len, size_t d_len, int); | |
63 | ||
64 | /* | |
65 | * Common signature for all zio decompress functions using an ABD as input. | |
66 | * This is helpful if you have both compressed ARC and scatter ABDs enabled, | |
67 | * but is not a requirement for all compression algorithms. | |
68 | */ | |
69 | typedef int zio_decompress_abd_func_t(abd_t *src, void *dst, | |
70 | size_t s_len, size_t d_len, int); | |
71 | /* | |
72 | * Information about each compression function. | |
73 | */ | |
74 | typedef const struct zio_compress_info { | |
75 | char *ci_name; | |
76 | int ci_level; | |
77 | zio_compress_func_t *ci_compress; | |
78 | zio_decompress_func_t *ci_decompress; | |
79 | } zio_compress_info_t; | |
80 | ||
81 | extern zio_compress_info_t zio_compress_table[ZIO_COMPRESS_FUNCTIONS]; | |
82 | ||
83 | /* | |
84 | * lz4 compression init & free | |
85 | */ | |
86 | extern void lz4_init(void); | |
87 | extern void lz4_fini(void); | |
88 | ||
89 | /* | |
90 | * Compression routines. | |
91 | */ | |
92 | extern size_t lzjb_compress(void *src, void *dst, size_t s_len, size_t d_len, | |
93 | int level); | |
94 | extern int lzjb_decompress(void *src, void *dst, size_t s_len, size_t d_len, | |
95 | int level); | |
96 | extern size_t gzip_compress(void *src, void *dst, size_t s_len, size_t d_len, | |
97 | int level); | |
98 | extern int gzip_decompress(void *src, void *dst, size_t s_len, size_t d_len, | |
99 | int level); | |
100 | extern size_t zle_compress(void *src, void *dst, size_t s_len, size_t d_len, | |
101 | int level); | |
102 | extern int zle_decompress(void *src, void *dst, size_t s_len, size_t d_len, | |
103 | int level); | |
104 | extern size_t lz4_compress_zfs(void *src, void *dst, size_t s_len, size_t d_len, | |
105 | int level); | |
106 | extern int lz4_decompress_zfs(void *src, void *dst, size_t s_len, size_t d_len, | |
107 | int level); | |
108 | extern int lz4_decompress_abd(abd_t *src, void *dst, size_t s_len, size_t d_len, | |
109 | int level); | |
110 | /* | |
111 | * Compress and decompress data if necessary. | |
112 | */ | |
113 | extern size_t zio_compress_data(enum zio_compress c, abd_t *src, void *dst, | |
114 | size_t s_len); | |
115 | extern int zio_decompress_data(enum zio_compress c, abd_t *src, void *dst, | |
116 | size_t s_len, size_t d_len); | |
117 | extern int zio_decompress_data_buf(enum zio_compress c, void *src, void *dst, | |
118 | size_t s_len, size_t d_len); | |
119 | ||
120 | #ifdef __cplusplus | |
121 | } | |
122 | #endif | |
123 | ||
124 | #endif /* _SYS_ZIO_COMPRESS_H */ |