[mirror_ubuntu-zesty-kernel.git] / include / crypto / if_alg.h

/*
 * 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 */
Commit	Line	Data
03c8efc1 HX	1	/*
	2	* if_alg: User-space algorithm interface
	3	*
	4	* Copyright (c) 2010 Herbert Xu <herbert@gondor.apana.org.au>
	5	*
	6	* This program is free software; you can redistribute it and/or modify it
	7	* under the terms of the GNU General Public License as published by the Free
	8	* Software Foundation; either version 2 of the License, or (at your option)
	9	* any later version.
	10	*
	11	*/
	12
	13	#ifndef _CRYPTO_IF_ALG_H
	14	#define _CRYPTO_IF_ALG_H
	15
	16	#include <linux/compiler.h>
	17	#include <linux/completion.h>
	18	#include <linux/if_alg.h>
b7f080cf	19	#include <linux/scatterlist.h>
03c8efc1 HX	20	#include <linux/types.h>
	21	#include <net/sock.h>
	22
	23	#define ALG_MAX_PAGES 16
	24
	25	struct crypto_async_request;
	26
	27	struct alg_sock {
	28	/* struct sock must be the first member of struct alg_sock */
	29	struct sock sk;
	30
	31	struct sock *parent;
	32
c840ac6a	33	unsigned int refcnt;
6a935170	34	unsigned int nokey_refcnt;
c840ac6a	35
03c8efc1 HX	36	const struct af_alg_type *type;
	37	void *private;
	38	};
	39
	40	struct af_alg_completion {
	41	struct completion completion;
	42	int err;
	43	};
	44
	45	struct af_alg_control {
	46	struct af_alg_iv *iv;
	47	int op;
af8e8073	48	unsigned int aead_assoclen;
03c8efc1 HX	49	};
	50
	51	struct af_alg_type {
	52	void (bind)(const char *name, u32 type, u32 mask);
	53	void (release)(void private);
	54	int (setkey)(void private, const u8 *key, unsigned int keylen);
	55	int (accept)(void private, struct sock *sk);
37766586	56	int (accept_nokey)(void private, struct sock *sk);
25fb8638	57	int (setauthsize)(void private, unsigned int authsize);
03c8efc1 HX	58
03c8efc1 HX	59	struct proto_ops *ops;
37766586	60	struct proto_ops *ops_nokey;
03c8efc1 HX	61	struct module *owner;
	62	char name[14];
	63	};
	64
	65	struct af_alg_sgl {
66db3739	66	struct scatterlist sg[ALG_MAX_PAGES + 1];
03c8efc1	67	struct page *pages[ALG_MAX_PAGES];
66db3739	68	unsigned int npages;
03c8efc1 HX	69	};
	70
	71	int af_alg_register_type(const struct af_alg_type *type);
	72	int af_alg_unregister_type(const struct af_alg_type *type);
	73
	74	int af_alg_release(struct socket *sock);
c840ac6a	75	void af_alg_release_parent(struct sock *sk);
03c8efc1 HX	76	int af_alg_accept(struct sock sk, struct socket newsock);
03c8efc1 HX	77
1d10eb2f	78	int af_alg_make_sg(struct af_alg_sgl sgl, struct iov_iter iter, int len);
03c8efc1	79	void af_alg_free_sg(struct af_alg_sgl *sgl);
66db3739	80	void af_alg_link_sg(struct af_alg_sgl sgl_prev, struct af_alg_sgl sgl_new);
03c8efc1 HX	81
	82	int af_alg_cmsg_send(struct msghdr msg, struct af_alg_control con);
	83
	84	int af_alg_wait_for_completion(int err, struct af_alg_completion *completion);
	85	void af_alg_complete(struct crypto_async_request *req, int err);
	86
	87	static inline struct alg_sock alg_sk(struct sock sk)
	88	{
	89	return (struct alg_sock *)sk;
	90	}
	91
03c8efc1 HX	92	static inline void af_alg_init_completion(struct af_alg_completion *completion)
	93	{
	94	init_completion(&completion->completion);
	95	}
	96
	97	#endif /* _CRYPTO_IF_ALG_H */