/*
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* if_alg: User-space algorithm interface
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*
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* Copyright (c) 2010 Herbert Xu <herbert@gondor.apana.org.au>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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*/
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#ifndef _CRYPTO_IF_ALG_H
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#define _CRYPTO_IF_ALG_H
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#include <linux/compiler.h>
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#include <linux/completion.h>
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#include <linux/if_alg.h>
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#include <linux/scatterlist.h>
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#include <linux/types.h>
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#include <net/sock.h>
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#define ALG_MAX_PAGES 16
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struct crypto_async_request;
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struct alg_sock {
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/* struct sock must be the first member of struct alg_sock */
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struct sock sk;
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struct sock *parent;
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unsigned int refcnt;
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unsigned int nokey_refcnt;
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const struct af_alg_type *type;
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void *private;
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};
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struct af_alg_completion {
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struct completion completion;
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int err;
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};
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struct af_alg_control {
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struct af_alg_iv *iv;
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int op;
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unsigned int aead_assoclen;
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};
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struct af_alg_type {
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void *(*bind)(const char *name, u32 type, u32 mask);
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void (*release)(void *private);
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int (*setkey)(void *private, const u8 *key, unsigned int keylen);
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int (*accept)(void *private, struct sock *sk);
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int (*accept_nokey)(void *private, struct sock *sk);
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int (*setauthsize)(void *private, unsigned int authsize);
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struct proto_ops *ops;
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struct proto_ops *ops_nokey;
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struct module *owner;
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char name[14];
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};
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struct af_alg_sgl {
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struct scatterlist sg[ALG_MAX_PAGES + 1];
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struct page *pages[ALG_MAX_PAGES];
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unsigned int npages;
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};
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int af_alg_register_type(const struct af_alg_type *type);
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int af_alg_unregister_type(const struct af_alg_type *type);
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int af_alg_release(struct socket *sock);
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void af_alg_release_parent(struct sock *sk);
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int af_alg_accept(struct sock *sk, struct socket *newsock);
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int af_alg_make_sg(struct af_alg_sgl *sgl, struct iov_iter *iter, int len);
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void af_alg_free_sg(struct af_alg_sgl *sgl);
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void af_alg_link_sg(struct af_alg_sgl *sgl_prev, struct af_alg_sgl *sgl_new);
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int af_alg_cmsg_send(struct msghdr *msg, struct af_alg_control *con);
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int af_alg_wait_for_completion(int err, struct af_alg_completion *completion);
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void af_alg_complete(struct crypto_async_request *req, int err);
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static inline struct alg_sock *alg_sk(struct sock *sk)
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{
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return (struct alg_sock *)sk;
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}
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static inline void af_alg_init_completion(struct af_alg_completion *completion)
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{
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init_completion(&completion->completion);
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}
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#endif /* _CRYPTO_IF_ALG_H */
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