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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
25struct crypto_async_request;
26
27struct alg_sock {
28
29 struct sock sk;
30
31 struct sock *parent;
32
33 unsigned int refcnt;
34 unsigned int nokey_refcnt;
35
36 const struct af_alg_type *type;
37 void *private;
38};
39
40struct af_alg_completion {
41 struct completion completion;
42 int err;
43};
44
45struct af_alg_control {
46 struct af_alg_iv *iv;
47 int op;
48 unsigned int aead_assoclen;
49};
50
51struct af_alg_type {
52 void *(*bind)(const char *name, u32 type, u32 mask);
53 void (*release)(void *private);
54 int (*setkey)(void *private, const u8 *key, unsigned int keylen);
55 int (*accept)(void *private, struct sock *sk);
56 int (*accept_nokey)(void *private, struct sock *sk);
57 int (*setauthsize)(void *private, unsigned int authsize);
58
59 struct proto_ops *ops;
60 struct proto_ops *ops_nokey;
61 struct module *owner;
62 char name[14];
63};
64
65struct af_alg_sgl {
66 struct scatterlist sg[ALG_MAX_PAGES + 1];
67 struct page *pages[ALG_MAX_PAGES];
68 unsigned int npages;
69};
70
71int af_alg_register_type(const struct af_alg_type *type);
72int af_alg_unregister_type(const struct af_alg_type *type);
73
74int af_alg_release(struct socket *sock);
75void af_alg_release_parent(struct sock *sk);
76int af_alg_accept(struct sock *sk, struct socket *newsock);
77
78int af_alg_make_sg(struct af_alg_sgl *sgl, struct iov_iter *iter, int len);
79void af_alg_free_sg(struct af_alg_sgl *sgl);
80void af_alg_link_sg(struct af_alg_sgl *sgl_prev, struct af_alg_sgl *sgl_new);
81
82int af_alg_cmsg_send(struct msghdr *msg, struct af_alg_control *con);
83
84int af_alg_wait_for_completion(int err, struct af_alg_completion *completion);
85void af_alg_complete(struct crypto_async_request *req, int err);
86
87static inline struct alg_sock *alg_sk(struct sock *sk)
88{
89 return (struct alg_sock *)sk;
90}
91
92static inline void af_alg_init_completion(struct af_alg_completion *completion)
93{
94 init_completion(&completion->completion);
95}
96
97#endif
98