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1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ | |
2 | /* | |
3 | * Cryptographic API. | |
4 | * | |
5 | * Copyright (c) 2002 James Morris <jmorris@intercode.com.au> | |
6 | * Copyright (c) 2005 Herbert Xu <herbert@gondor.apana.org.au> | |
7 | */ | |
8 | #ifndef _CRYPTO_INTERNAL_H | |
9 | #define _CRYPTO_INTERNAL_H | |
10 | ||
11 | #include <crypto/algapi.h> | |
12 | #include <linux/completion.h> | |
13 | #include <linux/list.h> | |
14 | #include <linux/module.h> | |
15 | #include <linux/notifier.h> | |
16 | #include <linux/numa.h> | |
17 | #include <linux/refcount.h> | |
18 | #include <linux/rwsem.h> | |
19 | #include <linux/sched.h> | |
20 | #include <linux/types.h> | |
21 | ||
22 | struct crypto_instance; | |
23 | struct crypto_template; | |
24 | ||
25 | struct crypto_larval { | |
26 | struct crypto_alg alg; | |
27 | struct crypto_alg *adult; | |
28 | struct completion completion; | |
29 | u32 mask; | |
30 | }; | |
31 | ||
32 | enum { | |
33 | CRYPTOA_UNSPEC, | |
34 | CRYPTOA_ALG, | |
35 | CRYPTOA_TYPE, | |
36 | __CRYPTOA_MAX, | |
37 | }; | |
38 | ||
39 | #define CRYPTOA_MAX (__CRYPTOA_MAX - 1) | |
40 | ||
41 | /* Maximum number of (rtattr) parameters for each template. */ | |
42 | #define CRYPTO_MAX_ATTRS 32 | |
43 | ||
44 | extern struct list_head crypto_alg_list; | |
45 | extern struct rw_semaphore crypto_alg_sem; | |
46 | extern struct blocking_notifier_head crypto_chain; | |
47 | ||
48 | #ifdef CONFIG_PROC_FS | |
49 | void __init crypto_init_proc(void); | |
50 | void __exit crypto_exit_proc(void); | |
51 | #else | |
52 | static inline void crypto_init_proc(void) | |
53 | { } | |
54 | static inline void crypto_exit_proc(void) | |
55 | { } | |
56 | #endif | |
57 | ||
58 | static inline unsigned int crypto_cipher_ctxsize(struct crypto_alg *alg) | |
59 | { | |
60 | return alg->cra_ctxsize; | |
61 | } | |
62 | ||
63 | static inline unsigned int crypto_compress_ctxsize(struct crypto_alg *alg) | |
64 | { | |
65 | return alg->cra_ctxsize; | |
66 | } | |
67 | ||
68 | struct crypto_alg *crypto_mod_get(struct crypto_alg *alg); | |
69 | struct crypto_alg *crypto_alg_mod_lookup(const char *name, u32 type, u32 mask); | |
70 | ||
71 | struct crypto_larval *crypto_larval_alloc(const char *name, u32 type, u32 mask); | |
72 | void crypto_larval_kill(struct crypto_alg *alg); | |
73 | void crypto_alg_tested(const char *name, int err); | |
74 | ||
75 | void crypto_remove_spawns(struct crypto_alg *alg, struct list_head *list, | |
76 | struct crypto_alg *nalg); | |
77 | void crypto_remove_final(struct list_head *list); | |
78 | void crypto_shoot_alg(struct crypto_alg *alg); | |
79 | struct crypto_tfm *__crypto_alloc_tfm(struct crypto_alg *alg, u32 type, | |
80 | u32 mask); | |
81 | void *crypto_create_tfm_node(struct crypto_alg *alg, | |
82 | const struct crypto_type *frontend, int node); | |
83 | ||
84 | static inline void *crypto_create_tfm(struct crypto_alg *alg, | |
85 | const struct crypto_type *frontend) | |
86 | { | |
87 | return crypto_create_tfm_node(alg, frontend, NUMA_NO_NODE); | |
88 | } | |
89 | ||
90 | struct crypto_alg *crypto_find_alg(const char *alg_name, | |
91 | const struct crypto_type *frontend, | |
92 | u32 type, u32 mask); | |
93 | ||
94 | void *crypto_alloc_tfm_node(const char *alg_name, | |
95 | const struct crypto_type *frontend, u32 type, u32 mask, | |
96 | int node); | |
97 | ||
98 | static inline void *crypto_alloc_tfm(const char *alg_name, | |
99 | const struct crypto_type *frontend, u32 type, u32 mask) | |
100 | { | |
101 | return crypto_alloc_tfm_node(alg_name, frontend, type, mask, NUMA_NO_NODE); | |
102 | } | |
103 | ||
104 | int crypto_probing_notify(unsigned long val, void *v); | |
105 | ||
106 | unsigned int crypto_alg_extsize(struct crypto_alg *alg); | |
107 | ||
108 | int crypto_type_has_alg(const char *name, const struct crypto_type *frontend, | |
109 | u32 type, u32 mask); | |
110 | ||
111 | static inline struct crypto_alg *crypto_alg_get(struct crypto_alg *alg) | |
112 | { | |
113 | refcount_inc(&alg->cra_refcnt); | |
114 | return alg; | |
115 | } | |
116 | ||
117 | static inline void crypto_alg_put(struct crypto_alg *alg) | |
118 | { | |
119 | if (refcount_dec_and_test(&alg->cra_refcnt) && alg->cra_destroy) | |
120 | alg->cra_destroy(alg); | |
121 | } | |
122 | ||
123 | static inline int crypto_tmpl_get(struct crypto_template *tmpl) | |
124 | { | |
125 | return try_module_get(tmpl->module); | |
126 | } | |
127 | ||
128 | static inline void crypto_tmpl_put(struct crypto_template *tmpl) | |
129 | { | |
130 | module_put(tmpl->module); | |
131 | } | |
132 | ||
133 | static inline int crypto_is_larval(struct crypto_alg *alg) | |
134 | { | |
135 | return alg->cra_flags & CRYPTO_ALG_LARVAL; | |
136 | } | |
137 | ||
138 | static inline int crypto_is_dead(struct crypto_alg *alg) | |
139 | { | |
140 | return alg->cra_flags & CRYPTO_ALG_DEAD; | |
141 | } | |
142 | ||
143 | static inline int crypto_is_moribund(struct crypto_alg *alg) | |
144 | { | |
145 | return alg->cra_flags & (CRYPTO_ALG_DEAD | CRYPTO_ALG_DYING); | |
146 | } | |
147 | ||
148 | static inline void crypto_notify(unsigned long val, void *v) | |
149 | { | |
150 | blocking_notifier_call_chain(&crypto_chain, val, v); | |
151 | } | |
152 | ||
153 | static inline void crypto_yield(u32 flags) | |
154 | { | |
155 | if (flags & CRYPTO_TFM_REQ_MAY_SLEEP) | |
156 | cond_resched(); | |
157 | } | |
158 | ||
159 | #endif /* _CRYPTO_INTERNAL_H */ | |
160 |