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