Linux kernel mirror (for testing)
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1/* SPDX-License-Identifier: GPL-2.0-or-later */
2/*
3 * Synchronous Compression operations
4 *
5 * Copyright 2015 LG Electronics Inc.
6 * Copyright (c) 2016, Intel Corporation
7 * Author: Giovanni Cabiddu <giovanni.cabiddu@intel.com>
8 */
9#ifndef _CRYPTO_SCOMP_INT_H
10#define _CRYPTO_SCOMP_INT_H
11
12#include <crypto/internal/acompress.h>
13
14struct crypto_scomp {
15 struct crypto_tfm base;
16};
17
18/**
19 * struct scomp_alg - synchronous compression algorithm
20 *
21 * @compress: Function performs a compress operation
22 * @decompress: Function performs a de-compress operation
23 * @streams: Per-cpu memory for algorithm
24 * @calg: Cmonn algorithm data structure shared with acomp
25 * @COMP_ALG_COMMON: see struct comp_alg_common
26 */
27struct scomp_alg {
28 int (*compress)(struct crypto_scomp *tfm, const u8 *src,
29 unsigned int slen, u8 *dst, unsigned int *dlen,
30 void *ctx);
31 int (*decompress)(struct crypto_scomp *tfm, const u8 *src,
32 unsigned int slen, u8 *dst, unsigned int *dlen,
33 void *ctx);
34
35 struct crypto_acomp_streams streams;
36
37 union {
38 struct COMP_ALG_COMMON;
39 struct comp_alg_common calg;
40 };
41};
42
43static inline struct scomp_alg *__crypto_scomp_alg(struct crypto_alg *alg)
44{
45 return container_of(alg, struct scomp_alg, base);
46}
47
48static inline struct crypto_scomp *__crypto_scomp_tfm(struct crypto_tfm *tfm)
49{
50 return container_of(tfm, struct crypto_scomp, base);
51}
52
53static inline struct crypto_tfm *crypto_scomp_tfm(struct crypto_scomp *tfm)
54{
55 return &tfm->base;
56}
57
58static inline void crypto_free_scomp(struct crypto_scomp *tfm)
59{
60 crypto_destroy_tfm(tfm, crypto_scomp_tfm(tfm));
61}
62
63static inline struct scomp_alg *crypto_scomp_alg(struct crypto_scomp *tfm)
64{
65 return __crypto_scomp_alg(crypto_scomp_tfm(tfm)->__crt_alg);
66}
67
68static inline int crypto_scomp_compress(struct crypto_scomp *tfm,
69 const u8 *src, unsigned int slen,
70 u8 *dst, unsigned int *dlen, void *ctx)
71{
72 return crypto_scomp_alg(tfm)->compress(tfm, src, slen, dst, dlen, ctx);
73}
74
75static inline int crypto_scomp_decompress(struct crypto_scomp *tfm,
76 const u8 *src, unsigned int slen,
77 u8 *dst, unsigned int *dlen,
78 void *ctx)
79{
80 return crypto_scomp_alg(tfm)->decompress(tfm, src, slen, dst, dlen,
81 ctx);
82}
83
84/**
85 * crypto_register_scomp() -- Register synchronous compression algorithm
86 *
87 * Function registers an implementation of a synchronous
88 * compression algorithm
89 *
90 * @alg: algorithm definition
91 *
92 * Return: zero on success; error code in case of error
93 */
94int crypto_register_scomp(struct scomp_alg *alg);
95
96/**
97 * crypto_unregister_scomp() -- Unregister synchronous compression algorithm
98 *
99 * Function unregisters an implementation of a synchronous
100 * compression algorithm
101 *
102 * @alg: algorithm definition
103 */
104void crypto_unregister_scomp(struct scomp_alg *alg);
105
106int crypto_register_scomps(struct scomp_alg *algs, int count);
107void crypto_unregister_scomps(struct scomp_alg *algs, int count);
108
109#endif