tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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/acompress.h>
13#include <crypto/algapi.h>
14
15struct acomp_req;
16
17struct crypto_scomp {
18 struct crypto_tfm base;
19};
20
21/**
22 * struct scomp_alg - synchronous compression algorithm
23 *
24 * @alloc_ctx: Function allocates algorithm specific context
25 * @free_ctx: Function frees context allocated with alloc_ctx
26 * @compress: Function performs a compress operation
27 * @decompress: Function performs a de-compress operation
28 * @base: Common crypto API algorithm data structure
29 * @stream: Per-cpu memory for algorithm
30 * @calg: Cmonn algorithm data structure shared with acomp
31 */
32struct scomp_alg {
33 void *(*alloc_ctx)(void);
34 void (*free_ctx)(void *ctx);
35 int (*compress)(struct crypto_scomp *tfm, const u8 *src,
36 unsigned int slen, u8 *dst, unsigned int *dlen,
37 void *ctx);
38 int (*decompress)(struct crypto_scomp *tfm, const u8 *src,
39 unsigned int slen, u8 *dst, unsigned int *dlen,
40 void *ctx);
41
42 union {
43 struct COMP_ALG_COMMON;
44 struct comp_alg_common calg;
45 };
46};
47
48static inline struct scomp_alg *__crypto_scomp_alg(struct crypto_alg *alg)
49{
50 return container_of(alg, struct scomp_alg, base);
51}
52
53static inline struct crypto_scomp *__crypto_scomp_tfm(struct crypto_tfm *tfm)
54{
55 return container_of(tfm, struct crypto_scomp, base);
56}
57
58static inline struct crypto_tfm *crypto_scomp_tfm(struct crypto_scomp *tfm)
59{
60 return &tfm->base;
61}
62
63static inline void crypto_free_scomp(struct crypto_scomp *tfm)
64{
65 crypto_destroy_tfm(tfm, crypto_scomp_tfm(tfm));
66}
67
68static inline struct scomp_alg *crypto_scomp_alg(struct crypto_scomp *tfm)
69{
70 return __crypto_scomp_alg(crypto_scomp_tfm(tfm)->__crt_alg);
71}
72
73static inline int crypto_scomp_compress(struct crypto_scomp *tfm,
74 const u8 *src, unsigned int slen,
75 u8 *dst, unsigned int *dlen, void *ctx)
76{
77 return crypto_scomp_alg(tfm)->compress(tfm, src, slen, dst, dlen, ctx);
78}
79
80static inline int crypto_scomp_decompress(struct crypto_scomp *tfm,
81 const u8 *src, unsigned int slen,
82 u8 *dst, unsigned int *dlen,
83 void *ctx)
84{
85 return crypto_scomp_alg(tfm)->decompress(tfm, src, slen, dst, dlen,
86 ctx);
87}
88
89/**
90 * crypto_register_scomp() -- Register synchronous compression algorithm
91 *
92 * Function registers an implementation of a synchronous
93 * compression algorithm
94 *
95 * @alg: algorithm definition
96 *
97 * Return: zero on success; error code in case of error
98 */
99int crypto_register_scomp(struct scomp_alg *alg);
100
101/**
102 * crypto_unregister_scomp() -- Unregister synchronous compression algorithm
103 *
104 * Function unregisters an implementation of a synchronous
105 * compression algorithm
106 *
107 * @alg: algorithm definition
108 */
109void crypto_unregister_scomp(struct scomp_alg *alg);
110
111int crypto_register_scomps(struct scomp_alg *algs, int count);
112void crypto_unregister_scomps(struct scomp_alg *algs, int count);
113
114#endif