2 * if_alg: User-space algorithm interface
4 * Copyright (c) 2010 Herbert Xu <herbert@gondor.apana.org.au>
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)
13 #ifndef _CRYPTO_IF_ALG_H
14 #define _CRYPTO_IF_ALG_H
16 #include <linux/compiler.h>
17 #include <linux/completion.h>
18 #include <linux/if_alg.h>
19 #include <linux/types.h>
22 #define ALG_MAX_PAGES 16
24 struct crypto_async_request;
27 /* struct sock must be the first member of struct alg_sock */
32 const struct af_alg_type *type;
36 struct af_alg_completion {
37 struct completion completion;
41 struct af_alg_control {
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);
52 struct proto_ops *ops;
58 struct scatterlist sg[ALG_MAX_PAGES];
59 struct page *pages[ALG_MAX_PAGES];
62 int af_alg_register_type(const struct af_alg_type *type);
63 int af_alg_unregister_type(const struct af_alg_type *type);
65 int af_alg_release(struct socket *sock);
66 int af_alg_accept(struct sock *sk, struct socket *newsock);
68 int af_alg_make_sg(struct af_alg_sgl *sgl, void __user *addr, int len,
70 void af_alg_free_sg(struct af_alg_sgl *sgl);
72 int af_alg_cmsg_send(struct msghdr *msg, struct af_alg_control *con);
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);
77 static inline struct alg_sock *alg_sk(struct sock *sk)
79 return (struct alg_sock *)sk;
82 static inline void af_alg_release_parent(struct sock *sk)
84 sock_put(alg_sk(sk)->parent);
87 static inline void af_alg_init_completion(struct af_alg_completion *completion)
89 init_completion(&completion->completion);
92 #endif /* _CRYPTO_IF_ALG_H */