99 lines
3.2 KiB
C
99 lines
3.2 KiB
C
/*
|
|
* BSD 3-Clause New License (https://spdx.org/licenses/BSD-3-Clause.html)
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright notice,
|
|
* this list of conditions and the following disclaimer.
|
|
*
|
|
* 2. Redistributions in binary form must reproduce the above copyright notice,
|
|
* this list of conditions and the following disclaimer in the documentation
|
|
* and/or other materials provided with the distribution.
|
|
*
|
|
* 3. Neither the name of the copyright holder nor the names of its
|
|
* contributors may be used to endorse or promote products derived from this
|
|
* software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
|
|
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
* POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
/*
|
|
* Copyright (c) 2016-2018, Klara Inc.
|
|
* Copyright (c) 2016-2018, Allan Jude
|
|
* Copyright (c) 2018-2020, Sebastian Gottschall
|
|
* Copyright (c) 2019-2020, Michael Niewöhner
|
|
* Copyright (c) 2020, The FreeBSD Foundation [1]
|
|
*
|
|
* [1] Portions of this software were developed by Allan Jude
|
|
* under sponsorship from the FreeBSD Foundation.
|
|
*/
|
|
|
|
#ifndef _ZFS_ZSTD_H
|
|
#define _ZFS_ZSTD_H
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
/*
|
|
* ZSTD block header
|
|
* NOTE: all fields in this header are in big endian order.
|
|
*/
|
|
typedef struct zfs_zstd_header {
|
|
/* Compressed size of data */
|
|
uint32_t c_len;
|
|
|
|
/*
|
|
* Version and compression level
|
|
* We use a union to be able to big endian encode a single 32 bit
|
|
* unsigned integer, but still access the individual bitmasked
|
|
* components easily.
|
|
*/
|
|
union {
|
|
uint32_t raw_version_level;
|
|
struct {
|
|
uint32_t version : 24;
|
|
uint8_t level;
|
|
};
|
|
};
|
|
|
|
char data[];
|
|
} zfs_zstdhdr_t;
|
|
|
|
/*
|
|
* kstat helper macros
|
|
*/
|
|
#define ZSTDSTAT(stat) (zstd_stats.stat.value.ui64)
|
|
#define ZSTDSTAT_INCR(stat, val) \
|
|
atomic_add_64(&zstd_stats.stat.value.ui64, (val))
|
|
#define ZSTDSTAT_BUMP(stat) ZSTDSTAT_INCR(stat, 1)
|
|
|
|
/* (de)init for user space / kernel emulation */
|
|
int zstd_init(void);
|
|
void zstd_fini(void);
|
|
|
|
size_t zfs_zstd_compress(void *s_start, void *d_start, size_t s_len,
|
|
size_t d_len, int level);
|
|
int zfs_zstd_get_level(void *s_start, size_t s_len, uint8_t *level);
|
|
int zfs_zstd_decompress_level(void *s_start, void *d_start, size_t s_len,
|
|
size_t d_len, uint8_t *level);
|
|
int zfs_zstd_decompress(void *s_start, void *d_start, size_t s_len,
|
|
size_t d_len, int n);
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* _ZFS_ZSTD_H */
|