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/scatterlist.h>
20 #include <linux/types.h>
23 #define ALG_MAX_PAGES 16
25 struct crypto_async_request;
28 /* struct sock must be the first member of struct alg_sock */
35 const struct af_alg_type *type;
39 struct af_alg_completion {
40 struct completion completion;
44 struct af_alg_control {
47 unsigned int aead_assoclen;
51 void *(*bind)(const char *name, u32 type, u32 mask);
52 void (*release)(void *private);
53 int (*setkey)(void *private, const u8 *key, unsigned int keylen);
54 int (*accept)(void *private, struct sock *sk);
55 int (*setauthsize)(void *private, unsigned int authsize);
57 struct proto_ops *ops;
63 struct scatterlist sg[ALG_MAX_PAGES + 1];
64 struct page *pages[ALG_MAX_PAGES];
68 int af_alg_register_type(const struct af_alg_type *type);
69 int af_alg_unregister_type(const struct af_alg_type *type);
71 int af_alg_release(struct socket *sock);
72 void af_alg_release_parent(struct sock *sk);
73 int af_alg_accept(struct sock *sk, struct socket *newsock);
75 int af_alg_make_sg(struct af_alg_sgl *sgl, struct iov_iter *iter, int len);
76 void af_alg_free_sg(struct af_alg_sgl *sgl);
77 void af_alg_link_sg(struct af_alg_sgl *sgl_prev, struct af_alg_sgl *sgl_new);
79 int af_alg_cmsg_send(struct msghdr *msg, struct af_alg_control *con);
81 int af_alg_wait_for_completion(int err, struct af_alg_completion *completion);
82 void af_alg_complete(struct crypto_async_request *req, int err);
84 static inline struct alg_sock *alg_sk(struct sock *sk)
86 return (struct alg_sock *)sk;
89 static inline void af_alg_init_completion(struct af_alg_completion *completion)
91 init_completion(&completion->completion);
94 #endif /* _CRYPTO_IF_ALG_H */