1/* 2 * Copyright (C) 2014 Sergey Senozhatsky. 3 * 4 * This program is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU General Public License 6 * as published by the Free Software Foundation; either version 7 * 2 of the License, or (at your option) any later version. 8 */ 9 10#ifndef _ZCOMP_H_ 11#define _ZCOMP_H_ 12 13struct zcomp_strm { 14 /* compression/decompression buffer */ 15 void *buffer; 16 struct crypto_comp *tfm; 17}; 18 19/* dynamic per-device compression frontend */ 20struct zcomp { 21 struct zcomp_strm * __percpu *stream; 22 const char *name; 23 struct hlist_node node; 24}; 25 26int zcomp_cpu_up_prepare(unsigned int cpu, struct hlist_node *node); 27int zcomp_cpu_dead(unsigned int cpu, struct hlist_node *node); 28ssize_t zcomp_available_show(const char *comp, char *buf); 29bool zcomp_available_algorithm(const char *comp); 30 31struct zcomp *zcomp_create(const char *comp); 32void zcomp_destroy(struct zcomp *comp); 33 34struct zcomp_strm *zcomp_stream_get(struct zcomp *comp); 35void zcomp_stream_put(struct zcomp *comp); 36 37int zcomp_compress(struct zcomp_strm *zstrm, 38 const void *src, unsigned int *dst_len); 39 40int zcomp_decompress(struct zcomp_strm *zstrm, 41 const void *src, unsigned int src_len, void *dst); 42 43bool zcomp_set_max_streams(struct zcomp *comp, int num_strm); 44#endif /* _ZCOMP_H_ */ 45