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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> | |
19 | #include <linux/types.h> | |
20 | #include <net/sock.h> | |
21 | ||
22 | #define ALG_MAX_PAGES 16 | |
23 | ||
24 | struct crypto_async_request; | |
25 | ||
26 | struct 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 | ||
36 | struct af_alg_completion { | |
37 | struct completion completion; | |
38 | int err; | |
39 | }; | |
40 | ||
41 | struct af_alg_control { | |
42 | struct af_alg_iv *iv; | |
43 | int op; | |
44 | }; | |
45 | ||
46 | struct 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 | ||
57 | struct af_alg_sgl { | |
58 | struct scatterlist sg[ALG_MAX_PAGES]; | |
59 | struct page *pages[ALG_MAX_PAGES]; | |
60 | }; | |
61 | ||
62 | int af_alg_register_type(const struct af_alg_type *type); | |
63 | int af_alg_unregister_type(const struct af_alg_type *type); | |
64 | ||
65 | int af_alg_release(struct socket *sock); | |
66 | int af_alg_accept(struct sock *sk, struct socket *newsock); | |
67 | ||
68 | int af_alg_make_sg(struct af_alg_sgl *sgl, void __user *addr, int len, | |
69 | int write); | |
70 | void af_alg_free_sg(struct af_alg_sgl *sgl); | |
71 | ||
72 | int af_alg_cmsg_send(struct msghdr *msg, struct af_alg_control *con); | |
73 | ||
74 | int af_alg_wait_for_completion(int err, struct af_alg_completion *completion); | |
75 | void af_alg_complete(struct crypto_async_request *req, int err); | |
76 | ||
77 | static inline struct alg_sock *alg_sk(struct sock *sk) | |
78 | { | |
79 | return (struct alg_sock *)sk; | |
80 | } | |
81 | ||
82 | static inline void af_alg_release_parent(struct sock *sk) | |
83 | { | |
84 | sock_put(alg_sk(sk)->parent); | |
85 | } | |
86 | ||
87 | static 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 */ |