Differential D26218 Diff 76306 sys/contrib/openzfs/include/sys/zio_compress.h

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sys/contrib/openzfs/include/sys/zio_compress.h

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* Copyright (c) 2019, Klara Inc.		* Copyright (c) 2019, Klara Inc.
* Use is subject to license terms.		* Use is subject to license terms.
* Copyright (c) 2015, 2016 by Delphix. All rights reserved.		* Copyright (c) 2015, 2016 by Delphix. All rights reserved.
*/		*/

#ifndef _SYS_ZIO_COMPRESS_H		#ifndef _SYS_ZIO_COMPRESS_H
#define _SYS_ZIO_COMPRESS_H		#define _SYS_ZIO_COMPRESS_H

		#if !defined(_STANDALONE)
#include <sys/abd.h>		#include <sys/abd.h>
		#endif

#ifdef __cplusplus		#ifdef __cplusplus
extern "C" {		extern "C" {
#endif		#endif

enum zio_compress {		enum zio_compress {
ZIO_COMPRESS_INHERIT = 0,		ZIO_COMPRESS_INHERIT = 0,
ZIO_COMPRESS_ON,		ZIO_COMPRESS_ON,
▲ Show 20 Lines • Show All 87 Lines • ▼ Show 20 Lines	typedef int zio_decompress_func_t(void src, void dst,
size_t s_len, size_t d_len, int);		size_t s_len, size_t d_len, int);
/* Common signature for all zio decompress and get level functions. */		/* Common signature for all zio decompress and get level functions. */
typedef int zio_decompresslevel_func_t(void src, void dst,		typedef int zio_decompresslevel_func_t(void src, void dst,
size_t s_len, size_t d_len, uint8_t *level);		size_t s_len, size_t d_len, uint8_t *level);
/* Common signature for all zio get-compression-level functions. */		/* Common signature for all zio get-compression-level functions. */
typedef int zio_getlevel_func_t(void src, size_t s_len, uint8_t level);		typedef int zio_getlevel_func_t(void src, size_t s_len, uint8_t level);


		#if !defined(_STANDALONE)
/*		/*
* Common signature for all zio decompress functions using an ABD as input.		* 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,		* This is helpful if you have both compressed ARC and scatter ABDs enabled,
* but is not a requirement for all compression algorithms.		* but is not a requirement for all compression algorithms.
*/		*/
typedef int zio_decompress_abd_func_t(abd_t src, void dst,		typedef int zio_decompress_abd_func_t(abd_t src, void dst,
size_t s_len, size_t d_len, int);		size_t s_len, size_t d_len, int);
		#endif

/*		/*
* Information about each compression function.		* Information about each compression function.
*/		*/
typedef const struct zio_compress_info {		typedef const struct zio_compress_info {
char *ci_name;		char *ci_name;
int ci_level;		int ci_level;
zio_compress_func_t *ci_compress;		zio_compress_func_t *ci_compress;
zio_decompress_func_t *ci_decompress;		zio_decompress_func_t *ci_decompress;
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extern size_t lz4_compress_zfs(void src, void dst, size_t s_len, size_t d_len,		extern size_t lz4_compress_zfs(void src, void dst, size_t s_len, size_t d_len,
int level);		int level);
extern int lz4_decompress_zfs(void src, void dst, size_t s_len, size_t d_len,		extern int lz4_decompress_zfs(void src, void dst, size_t s_len, size_t d_len,
int level);		int level);

/*		/*
* Compress and decompress data if necessary.		* Compress and decompress data if necessary.
*/		*/
		#if !defined(_STANDALONE)
extern size_t zio_compress_data(enum zio_compress c, abd_t src, void dst,		extern size_t zio_compress_data(enum zio_compress c, abd_t src, void dst,
size_t s_len, uint8_t level);		size_t s_len, uint8_t level);
extern int zio_decompress_data(enum zio_compress c, abd_t src, void dst,		extern int zio_decompress_data(enum zio_compress c, abd_t src, void dst,
size_t s_len, size_t d_len, uint8_t *level);		size_t s_len, size_t d_len, uint8_t *level);
		#endif
extern int zio_decompress_data_buf(enum zio_compress c, void src, void dst,		extern int zio_decompress_data_buf(enum zio_compress c, void src, void dst,
size_t s_len, size_t d_len, uint8_t *level);		size_t s_len, size_t d_len, uint8_t *level);
extern int zio_compress_to_feature(enum zio_compress comp);		extern int zio_compress_to_feature(enum zio_compress comp);

#ifdef __cplusplus		#ifdef __cplusplus
}		}
#endif		#endif

#endif /* _SYS_ZIO_COMPRESS_H */		#endif /* _SYS_ZIO_COMPRESS_H */