| rjw | 1f88458 | 2022-01-06 17:20:42 +0800 | [diff] [blame^] | 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 | |
| 13 | struct zcomp_strm { |
| 14 | /* compression/decompression buffer */ |
| 15 | void *buffer; |
| 16 | struct crypto_comp *tfm; |
| 17 | }; |
| 18 | |
| 19 | /* dynamic per-device compression frontend */ |
| 20 | struct zcomp { |
| 21 | struct zcomp_strm * __percpu *stream; |
| 22 | const char *name; |
| 23 | struct hlist_node node; |
| 24 | }; |
| 25 | |
| 26 | int zcomp_cpu_up_prepare(unsigned int cpu, struct hlist_node *node); |
| 27 | int zcomp_cpu_dead(unsigned int cpu, struct hlist_node *node); |
| 28 | ssize_t zcomp_available_show(const char *comp, char *buf); |
| 29 | bool zcomp_available_algorithm(const char *comp); |
| 30 | |
| 31 | struct zcomp *zcomp_create(const char *comp); |
| 32 | void zcomp_destroy(struct zcomp *comp); |
| 33 | |
| 34 | struct zcomp_strm *zcomp_stream_get(struct zcomp *comp); |
| 35 | void zcomp_stream_put(struct zcomp *comp); |
| 36 | |
| 37 | int zcomp_compress(struct zcomp_strm *zstrm, |
| 38 | const void *src, unsigned int *dst_len); |
| 39 | |
| 40 | int zcomp_decompress(struct zcomp_strm *zstrm, |
| 41 | const void *src, unsigned int src_len, void *dst); |
| 42 | |
| 43 | bool zcomp_set_max_streams(struct zcomp *comp, int num_strm); |
| 44 | #endif /* _ZCOMP_H_ */ |