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/*
* if_alg: User-space algorithm interface
*
* Copyright (c) 2010 Herbert Xu <herbert@gondor.apana.org.au>
*
* 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_IF_ALG_H
#define _CRYPTO_IF_ALG_H
#include <linux/compiler.h>
#include <linux/completion.h>
#include <linux/if_alg.h>
#include <linux/scatterlist.h>
#include <linux/types.h>
#include <net/sock.h>
#define ALG_MAX_PAGES 16
struct crypto_async_request;
struct alg_sock {
/* struct sock must be the first member of struct alg_sock */
struct sock sk;
struct sock *parent;
unsigned int refcnt;
unsigned int nokey_refcnt;
const struct af_alg_type *type;
void *private;
};
struct af_alg_completion {
struct completion completion;
int err;
};
struct af_alg_control {
struct af_alg_iv *iv;
int op;
unsigned int aead_assoclen;
};
struct af_alg_type {
void *(*bind)(const char *name, u32 type, u32 mask);
void (*release)(void *private);
int (*setkey)(void *private, const u8 *key, unsigned int keylen);
int (*accept)(void *private, struct sock *sk);
int (*accept_nokey)(void *private, struct sock *sk);
int (*setauthsize)(void *private, unsigned int authsize);
struct proto_ops *ops;
struct proto_ops *ops_nokey;
struct module *owner;
char name[14];
};
struct af_alg_sgl {
struct scatterlist sg[ALG_MAX_PAGES + 1];
struct page *pages[ALG_MAX_PAGES];
unsigned int npages;
};
int af_alg_register_type(const struct af_alg_type *type);
int af_alg_unregister_type(const struct af_alg_type *type);
int af_alg_release(struct socket *sock);
void af_alg_release_parent(struct sock *sk);
int af_alg_accept(struct sock *sk, struct socket *newsock);
int af_alg_make_sg(struct af_alg_sgl *sgl, struct iov_iter *iter, int len);
void af_alg_free_sg(struct af_alg_sgl *sgl);
void af_alg_link_sg(struct af_alg_sgl *sgl_prev, struct af_alg_sgl *sgl_new);
int af_alg_cmsg_send(struct msghdr *msg, struct af_alg_control *con);
int af_alg_wait_for_completion(int err, struct af_alg_completion *completion);
void af_alg_complete(struct crypto_async_request *req, int err);
static inline struct alg_sock *alg_sk(struct sock *sk)
{
return (struct alg_sock *)sk;
}
static inline void af_alg_init_completion(struct af_alg_completion *completion)
{
init_completion(&completion->completion);
}
#endif /* _CRYPTO_IF_ALG_H */