LXR linux/include/crypto/if

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