1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* 3 * Copyright (C) 2014 Sergey Senozhatsky. 4 */ 5 6 #ifndef _ZCOMP_H_ 7 #define _ZCOMP_H_ 8 9 struct zcomp_strm { 10 /* compression/decompression buffer */ 11 void *buffer; 12 struct crypto_comp *tfm; 13 }; 14 15 /* dynamic per-device compression frontend */ 16 struct zcomp { 17 struct zcomp_strm * __percpu *stream; 18 const char *name; 19 struct hlist_node node; 20 }; 21 22 int zcomp_cpu_up_prepare(unsigned int cpu, struct hlist_node *node); 23 int zcomp_cpu_dead(unsigned int cpu, struct hlist_node *node); 24 ssize_t zcomp_available_show(const char *comp, char *buf); 25 bool zcomp_available_algorithm(const char *comp); 26 27 struct zcomp *zcomp_create(const char *comp); 28 void zcomp_destroy(struct zcomp *comp); 29 30 struct zcomp_strm *zcomp_stream_get(struct zcomp *comp); 31 void zcomp_stream_put(struct zcomp *comp); 32 33 int zcomp_compress(struct zcomp_strm *zstrm, 34 const void *src, unsigned int *dst_len); 35 36 int zcomp_decompress(struct zcomp_strm *zstrm, 37 const void *src, unsigned int src_len, void *dst); 38 39 bool zcomp_set_max_streams(struct zcomp *comp, int num_strm); 40 #endif /* _ZCOMP_H_ */ 41