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/scatterlist.h> 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 */ 94