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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Copyright (C) 2014 Sergey Senozhatsky.
*/
#ifndef _ZCOMP_H_
#define _ZCOMP_H_
#include <linux/local_lock.h>
struct zcomp_strm {
/* The members ->buffer and ->tfm are protected by ->lock. */
local_lock_t lock;
/* compression/decompression buffer */
void *buffer;
struct crypto_comp *tfm;
};
/* dynamic per-device compression frontend */
struct zcomp {
struct zcomp_strm __percpu *stream;
const char *name;
struct hlist_node node;
};
int zcomp_cpu_up_prepare(unsigned int cpu, struct hlist_node *node);
int zcomp_cpu_dead(unsigned int cpu, struct hlist_node *node);
ssize_t zcomp_available_show(const char *comp, char *buf);
bool zcomp_available_algorithm(const char *comp);
struct zcomp *zcomp_create(const char *alg);
void zcomp_destroy(struct zcomp *comp);
struct zcomp_strm *zcomp_stream_get(struct zcomp *comp);
void zcomp_stream_put(struct zcomp *comp);
int zcomp_compress(struct zcomp_strm *zstrm,
const void *src, unsigned int *dst_len);
int zcomp_decompress(struct zcomp_strm *zstrm,
const void *src, unsigned int src_len, void *dst);
bool zcomp_set_max_streams(struct zcomp *comp, int num_strm);
#endif /* _ZCOMP_H_ */
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