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