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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>
19#include <linux/types.h>
20#include <net/sock.h>
21
22#define ALG_MAX_PAGES 16
23
24struct crypto_async_request;
25
26struct alg_sock {
27 /* struct sock must be the first member of struct alg_sock */
28 struct sock sk;
29
30 struct sock *parent;
31
32 const struct af_alg_type *type;
33 void *private;
34};
35
36struct af_alg_completion {
37 struct completion completion;
38 int err;
39};
40
41struct af_alg_control {
42 struct af_alg_iv *iv;
43 int op;
44};
45
46struct af_alg_type {
47 void *(*bind)(const char *name, u32 type, u32 mask);
48 void (*release)(void *private);
49 int (*setkey)(void *private, const u8 *key, unsigned int keylen);
50 int (*accept)(void *private, struct sock *sk);
51
52 struct proto_ops *ops;
53 struct module *owner;
54 char name[14];
55};
56
57struct af_alg_sgl {
58 struct scatterlist sg[ALG_MAX_PAGES];
59 struct page *pages[ALG_MAX_PAGES];
60};
61
62int af_alg_register_type(const struct af_alg_type *type);
63int af_alg_unregister_type(const struct af_alg_type *type);
64
65int af_alg_release(struct socket *sock);
66int af_alg_accept(struct sock *sk, struct socket *newsock);
67
68int af_alg_make_sg(struct af_alg_sgl *sgl, void __user *addr, int len,
69 int write);
70void af_alg_free_sg(struct af_alg_sgl *sgl);
71
72int af_alg_cmsg_send(struct msghdr *msg, struct af_alg_control *con);
73
74int af_alg_wait_for_completion(int err, struct af_alg_completion *completion);
75void af_alg_complete(struct crypto_async_request *req, int err);
76
77static inline struct alg_sock *alg_sk(struct sock *sk)
78{
79 return (struct alg_sock *)sk;
80}
81
82static inline void af_alg_release_parent(struct sock *sk)
83{
84 sock_put(alg_sk(sk)->parent);
85}
86
87static inline void af_alg_init_completion(struct af_alg_completion *completion)
88{
89 init_completion(&completion->completion);
90}
91
92#endif /* _CRYPTO_IF_ALG_H */