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 */ 93