/usr/include/libzfs/sys/zio_compress.h is in libzfslinux-dev 0.7.5-1ubuntu15.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
* Copyright (c) 2015, 2016 by Delphix. All rights reserved.
*/
#ifndef _SYS_ZIO_COMPRESS_H
#define _SYS_ZIO_COMPRESS_H
#include <sys/abd.h>
#ifdef __cplusplus
extern "C" {
#endif
enum zio_compress {
ZIO_COMPRESS_INHERIT = 0,
ZIO_COMPRESS_ON,
ZIO_COMPRESS_OFF,
ZIO_COMPRESS_LZJB,
ZIO_COMPRESS_EMPTY,
ZIO_COMPRESS_GZIP_1,
ZIO_COMPRESS_GZIP_2,
ZIO_COMPRESS_GZIP_3,
ZIO_COMPRESS_GZIP_4,
ZIO_COMPRESS_GZIP_5,
ZIO_COMPRESS_GZIP_6,
ZIO_COMPRESS_GZIP_7,
ZIO_COMPRESS_GZIP_8,
ZIO_COMPRESS_GZIP_9,
ZIO_COMPRESS_ZLE,
ZIO_COMPRESS_LZ4,
ZIO_COMPRESS_FUNCTIONS
};
/* Common signature for all zio compress functions. */
typedef size_t zio_compress_func_t(void *src, void *dst,
size_t s_len, size_t d_len, int);
/* Common signature for all zio decompress functions. */
typedef int zio_decompress_func_t(void *src, void *dst,
size_t s_len, size_t d_len, int);
/*
* Common signature for all zio decompress functions using an ABD as input.
* This is helpful if you have both compressed ARC and scatter ABDs enabled,
* but is not a requirement for all compression algorithms.
*/
typedef int zio_decompress_abd_func_t(abd_t *src, void *dst,
size_t s_len, size_t d_len, int);
/*
* Information about each compression function.
*/
typedef const struct zio_compress_info {
char *ci_name;
int ci_level;
zio_compress_func_t *ci_compress;
zio_decompress_func_t *ci_decompress;
} zio_compress_info_t;
extern zio_compress_info_t zio_compress_table[ZIO_COMPRESS_FUNCTIONS];
/*
* lz4 compression init & free
*/
extern void lz4_init(void);
extern void lz4_fini(void);
/*
* Compression routines.
*/
extern size_t lzjb_compress(void *src, void *dst, size_t s_len, size_t d_len,
int level);
extern int lzjb_decompress(void *src, void *dst, size_t s_len, size_t d_len,
int level);
extern size_t gzip_compress(void *src, void *dst, size_t s_len, size_t d_len,
int level);
extern int gzip_decompress(void *src, void *dst, size_t s_len, size_t d_len,
int level);
extern size_t zle_compress(void *src, void *dst, size_t s_len, size_t d_len,
int level);
extern int zle_decompress(void *src, void *dst, size_t s_len, size_t d_len,
int level);
extern size_t lz4_compress_zfs(void *src, void *dst, size_t s_len, size_t d_len,
int level);
extern int lz4_decompress_zfs(void *src, void *dst, size_t s_len, size_t d_len,
int level);
extern int lz4_decompress_abd(abd_t *src, void *dst, size_t s_len, size_t d_len,
int level);
/*
* Compress and decompress data if necessary.
*/
extern size_t zio_compress_data(enum zio_compress c, abd_t *src, void *dst,
size_t s_len);
extern int zio_decompress_data(enum zio_compress c, abd_t *src, void *dst,
size_t s_len, size_t d_len);
extern int zio_decompress_data_buf(enum zio_compress c, void *src, void *dst,
size_t s_len, size_t d_len);
#ifdef __cplusplus
}
#endif
#endif /* _SYS_ZIO_COMPRESS_H */
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