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 */
26struct scomp_alg {
27 int (*compress)(struct crypto_scomp *tfm, const u8 *src,
28 unsigned int slen, u8 *dst, unsigned int *dlen,
29 void *ctx);
30 int (*decompress)(struct crypto_scomp *tfm, const u8 *src,
31 unsigned int slen, u8 *dst, unsigned int *dlen,
32 void *ctx);
33
34 struct crypto_acomp_streams streams;
35
36 union {
37 struct COMP_ALG_COMMON;
38 struct comp_alg_common calg;
39 };
40};
41
42static inline struct scomp_alg *__crypto_scomp_alg(struct crypto_alg *alg)
43{
44 return container_of(alg, struct scomp_alg, base);
45}
46
47static inline struct crypto_scomp *__crypto_scomp_tfm(struct crypto_tfm *tfm)
48{
49 return container_of(tfm, struct crypto_scomp, base);
50}
51
52static inline struct crypto_tfm *crypto_scomp_tfm(struct crypto_scomp *tfm)
53{
54 return &tfm->base;
55}
56
57static inline void crypto_free_scomp(struct crypto_scomp *tfm)
58{
59 crypto_destroy_tfm(mem: tfm, tfm: crypto_scomp_tfm(tfm));
60}
61
62static inline struct scomp_alg *crypto_scomp_alg(struct crypto_scomp *tfm)
63{
64 return __crypto_scomp_alg(alg: crypto_scomp_tfm(tfm)->__crt_alg);
65}
66
67static inline int crypto_scomp_compress(struct crypto_scomp *tfm,
68 const u8 *src, unsigned int slen,
69 u8 *dst, unsigned int *dlen, void *ctx)
70{
71 return crypto_scomp_alg(tfm)->compress(tfm, src, slen, dst, dlen, ctx);
72}
73
74static inline int crypto_scomp_decompress(struct crypto_scomp *tfm,
75 const u8 *src, unsigned int slen,
76 u8 *dst, unsigned int *dlen,
77 void *ctx)
78{
79 return crypto_scomp_alg(tfm)->decompress(tfm, src, slen, dst, dlen,
80 ctx);
81}
82
83/**
84 * crypto_register_scomp() -- Register synchronous compression algorithm
85 *
86 * Function registers an implementation of a synchronous
87 * compression algorithm
88 *
89 * @alg: algorithm definition
90 *
91 * Return: zero on success; error code in case of error
92 */
93int crypto_register_scomp(struct scomp_alg *alg);
94
95/**
96 * crypto_unregister_scomp() -- Unregister synchronous compression algorithm
97 *
98 * Function unregisters an implementation of a synchronous
99 * compression algorithm
100 *
101 * @alg: algorithm definition
102 */
103void crypto_unregister_scomp(struct scomp_alg *alg);
104
105int crypto_register_scomps(struct scomp_alg *algs, int count);
106void crypto_unregister_scomps(struct scomp_alg *algs, int count);
107
108#endif
109

source code of linux/include/crypto/internal/scompress.h