projects / mirror_zfs-debian.git / blame
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|---|---|---|
| 34dc7c2f BB |
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 2007 Sun Microsystems, Inc. All rights reserved. | |
| 24 | * Use is subject to license terms. | |
| 25 | */ | |
| 26 | ||
| 27 | #ifndef _SYS_ZIO_COMPRESS_H | |
| 28 | #define _SYS_ZIO_COMPRESS_H | |
| 29 | ||
| b128c09f | 30 | #pragma ident "%Z%%M% %I% %E% SMI" |
| 34dc7c2f BB |
31 | |
| 32 | #include <sys/zio.h> | |
| 33 | ||
| 34 | #ifdef __cplusplus | |
| 35 | extern "C" { | |
| 36 | #endif | |
| 37 | ||
| 38 | /* | |
| 39 | * Common signature for all zio compress/decompress functions. | |
| 40 | */ | |
| 41 | typedef size_t zio_compress_func_t(void *src, void *dst, | |
| 42 | size_t s_len, size_t d_len, int); | |
| 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 | ||
| 70 | /* | |
| 71 | * Compress and decompress data if necessary. | |
| 72 | */ | |
| 73 | extern int zio_compress_data(int cpfunc, void *src, uint64_t srcsize, | |
| 74 | void **destp, uint64_t *destsizep, uint64_t *destbufsizep); | |
| 75 | extern int zio_decompress_data(int cpfunc, void *src, uint64_t srcsize, | |
| 76 | void *dest, uint64_t destsize); | |
| 77 | ||
| 78 | #ifdef __cplusplus | |
| 79 | } | |
| 80 | #endif | |
| 81 | ||
| 82 | #endif /* _SYS_ZIO_COMPRESS_H */ |