129 lines
3.6 KiB
C
129 lines
3.6 KiB
C
/*
|
|
* Synchronous Compression operations
|
|
*
|
|
* Copyright 2015 LG Electronics Inc.
|
|
* Copyright (c) 2016, Intel Corporation
|
|
* Author: Giovanni Cabiddu <giovanni.cabiddu@intel.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License as published by the Free
|
|
* Software Foundation; either version 2 of the License, or (at your option)
|
|
* any later version.
|
|
*
|
|
*/
|
|
#ifndef _CRYPTO_SCOMP_INT_H
|
|
#define _CRYPTO_SCOMP_INT_H
|
|
#include <linux/crypto.h>
|
|
|
|
#define SCOMP_SCRATCH_SIZE 131072
|
|
|
|
struct crypto_scomp {
|
|
struct crypto_tfm base;
|
|
};
|
|
|
|
/**
|
|
* struct scomp_alg - synchronous compression algorithm
|
|
*
|
|
* @alloc_ctx: Function allocates algorithm specific context
|
|
* @free_ctx: Function frees context allocated with alloc_ctx
|
|
* @compress: Function performs a compress operation
|
|
* @decompress: Function performs a de-compress operation
|
|
* @base: Common crypto API algorithm data structure
|
|
*/
|
|
struct scomp_alg {
|
|
void *(*alloc_ctx)(struct crypto_scomp *tfm);
|
|
void (*free_ctx)(struct crypto_scomp *tfm, void *ctx);
|
|
int (*compress)(struct crypto_scomp *tfm, const u8 *src,
|
|
unsigned int slen, u8 *dst, unsigned int *dlen,
|
|
void *ctx);
|
|
int (*decompress)(struct crypto_scomp *tfm, const u8 *src,
|
|
unsigned int slen, u8 *dst, unsigned int *dlen,
|
|
void *ctx);
|
|
struct crypto_alg base;
|
|
};
|
|
|
|
static inline struct scomp_alg *__crypto_scomp_alg(struct crypto_alg *alg)
|
|
{
|
|
return container_of(alg, struct scomp_alg, base);
|
|
}
|
|
|
|
static inline struct crypto_scomp *__crypto_scomp_tfm(struct crypto_tfm *tfm)
|
|
{
|
|
return container_of(tfm, struct crypto_scomp, base);
|
|
}
|
|
|
|
static inline struct crypto_tfm *crypto_scomp_tfm(struct crypto_scomp *tfm)
|
|
{
|
|
return &tfm->base;
|
|
}
|
|
|
|
static inline void crypto_free_scomp(struct crypto_scomp *tfm)
|
|
{
|
|
crypto_destroy_tfm(tfm, crypto_scomp_tfm(tfm));
|
|
}
|
|
|
|
static inline struct scomp_alg *crypto_scomp_alg(struct crypto_scomp *tfm)
|
|
{
|
|
return __crypto_scomp_alg(crypto_scomp_tfm(tfm)->__crt_alg);
|
|
}
|
|
|
|
static inline void *crypto_scomp_alloc_ctx(struct crypto_scomp *tfm)
|
|
{
|
|
return crypto_scomp_alg(tfm)->alloc_ctx(tfm);
|
|
}
|
|
|
|
static inline void crypto_scomp_free_ctx(struct crypto_scomp *tfm,
|
|
void *ctx)
|
|
{
|
|
return crypto_scomp_alg(tfm)->free_ctx(tfm, ctx);
|
|
}
|
|
|
|
static inline int crypto_scomp_compress(struct crypto_scomp *tfm,
|
|
const u8 *src, unsigned int slen,
|
|
u8 *dst, unsigned int *dlen, void *ctx)
|
|
{
|
|
return crypto_scomp_alg(tfm)->compress(tfm, src, slen, dst, dlen, ctx);
|
|
}
|
|
|
|
static inline int crypto_scomp_decompress(struct crypto_scomp *tfm,
|
|
const u8 *src, unsigned int slen,
|
|
u8 *dst, unsigned int *dlen,
|
|
void *ctx)
|
|
{
|
|
return crypto_scomp_alg(tfm)->decompress(tfm, src, slen, dst, dlen,
|
|
ctx);
|
|
}
|
|
|
|
int crypto_init_scomp_ops_async(struct crypto_tfm *tfm);
|
|
struct acomp_req *crypto_acomp_scomp_alloc_ctx(struct acomp_req *req);
|
|
void crypto_acomp_scomp_free_ctx(struct acomp_req *req);
|
|
|
|
/**
|
|
* crypto_register_scomp() -- Register synchronous compression algorithm
|
|
*
|
|
* Function registers an implementation of a synchronous
|
|
* compression algorithm
|
|
*
|
|
* @alg: algorithm definition
|
|
*
|
|
* Return: zero on success; error code in case of error
|
|
*/
|
|
int crypto_register_scomp(struct scomp_alg *alg);
|
|
|
|
/**
|
|
* crypto_unregister_scomp() -- Unregister synchronous compression algorithm
|
|
*
|
|
* Function unregisters an implementation of a synchronous
|
|
* compression algorithm
|
|
*
|
|
* @alg: algorithm definition
|
|
*
|
|
* Return: zero on success; error code in case of error
|
|
*/
|
|
int crypto_unregister_scomp(struct scomp_alg *alg);
|
|
|
|
int crypto_register_scomps(struct scomp_alg *algs, int count);
|
|
void crypto_unregister_scomps(struct scomp_alg *algs, int count);
|
|
|
|
#endif
|