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Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Synchronous Compression operations
3 *
4 * Copyright 2015 LG Electronics Inc.
5 * Copyright (c) 2016, Intel Corporation
6 * Author: Giovanni Cabiddu <giovanni.cabiddu@intel.com>
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the Free
10 * Software Foundation; either version 2 of the License, or (at your option)
11 * any later version.
12 *
13 */
14#ifndef _CRYPTO_SCOMP_INT_H
15#define _CRYPTO_SCOMP_INT_H
16#include <linux/crypto.h>
17
18#define SCOMP_SCRATCH_SIZE 131072
19
20struct crypto_scomp {
21 struct crypto_tfm base;
22};
23
24/**
25 * struct scomp_alg - synchronous compression algorithm
26 *
27 * @alloc_ctx: Function allocates algorithm specific context
28 * @free_ctx: Function frees context allocated with alloc_ctx
29 * @compress: Function performs a compress operation
30 * @decompress: Function performs a de-compress operation
31 * @base: Common crypto API algorithm data structure
32 */
33struct scomp_alg {
34 void *(*alloc_ctx)(struct crypto_scomp *tfm);
35 void (*free_ctx)(struct crypto_scomp *tfm, void *ctx);
36 int (*compress)(struct crypto_scomp *tfm, const u8 *src,
37 unsigned int slen, u8 *dst, unsigned int *dlen,
38 void *ctx);
39 int (*decompress)(struct crypto_scomp *tfm, const u8 *src,
40 unsigned int slen, u8 *dst, unsigned int *dlen,
41 void *ctx);
42 struct crypto_alg base;
43};
44
45static inline struct scomp_alg *__crypto_scomp_alg(struct crypto_alg *alg)
46{
47 return container_of(alg, struct scomp_alg, base);
48}
49
50static inline struct crypto_scomp *__crypto_scomp_tfm(struct crypto_tfm *tfm)
51{
52 return container_of(tfm, struct crypto_scomp, base);
53}
54
55static inline struct crypto_tfm *crypto_scomp_tfm(struct crypto_scomp *tfm)
56{
57 return &tfm->base;
58}
59
60static inline void crypto_free_scomp(struct crypto_scomp *tfm)
61{
62 crypto_destroy_tfm(tfm, crypto_scomp_tfm(tfm));
63}
64
65static inline struct scomp_alg *crypto_scomp_alg(struct crypto_scomp *tfm)
66{
67 return __crypto_scomp_alg(crypto_scomp_tfm(tfm)->__crt_alg);
68}
69
70static inline void *crypto_scomp_alloc_ctx(struct crypto_scomp *tfm)
71{
72 return crypto_scomp_alg(tfm)->alloc_ctx(tfm);
73}
74
75static inline void crypto_scomp_free_ctx(struct crypto_scomp *tfm,
76 void *ctx)
77{
78 return crypto_scomp_alg(tfm)->free_ctx(tfm, ctx);
79}
80
81static inline int crypto_scomp_compress(struct crypto_scomp *tfm,
82 const u8 *src, unsigned int slen,
83 u8 *dst, unsigned int *dlen, void *ctx)
84{
85 return crypto_scomp_alg(tfm)->compress(tfm, src, slen, dst, dlen, ctx);
86}
87
88static inline int crypto_scomp_decompress(struct crypto_scomp *tfm,
89 const u8 *src, unsigned int slen,
90 u8 *dst, unsigned int *dlen,
91 void *ctx)
92{
93 return crypto_scomp_alg(tfm)->decompress(tfm, src, slen, dst, dlen,
94 ctx);
95}
96
97int crypto_init_scomp_ops_async(struct crypto_tfm *tfm);
98struct acomp_req *crypto_acomp_scomp_alloc_ctx(struct acomp_req *req);
99void crypto_acomp_scomp_free_ctx(struct acomp_req *req);
100
101/**
102 * crypto_register_scomp() -- Register synchronous compression algorithm
103 *
104 * Function registers an implementation of a synchronous
105 * compression algorithm
106 *
107 * @alg: algorithm definition
108 *
109 * Return: zero on success; error code in case of error
110 */
111int crypto_register_scomp(struct scomp_alg *alg);
112
113/**
114 * crypto_unregister_scomp() -- Unregister synchronous compression algorithm
115 *
116 * Function unregisters an implementation of a synchronous
117 * compression algorithm
118 *
119 * @alg: algorithm definition
120 *
121 * Return: zero on success; error code in case of error
122 */
123int crypto_unregister_scomp(struct scomp_alg *alg);
124
125int crypto_register_scomps(struct scomp_alg *algs, int count);
126void crypto_unregister_scomps(struct scomp_alg *algs, int count);
127
128#endif