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TOMOYO Linux Cross Reference
Linux/crypto/internal.h

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  1 /*
  2  * Cryptographic API.
  3  *
  4  * Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
  5  * Copyright (c) 2005 Herbert Xu <herbert@gondor.apana.org.au>
  6  *
  7  * This program is free software; you can redistribute it and/or modify it
  8  * under the terms of the GNU General Public License as published by the Free
  9  * Software Foundation; either version 2 of the License, or (at your option)
 10  * any later version.
 11  *
 12  */
 13 #ifndef _CRYPTO_INTERNAL_H
 14 #define _CRYPTO_INTERNAL_H
 15 
 16 #include <crypto/algapi.h>
 17 #include <linux/completion.h>
 18 #include <linux/mm.h>
 19 #include <linux/highmem.h>
 20 #include <linux/interrupt.h>
 21 #include <linux/init.h>
 22 #include <linux/list.h>
 23 #include <linux/module.h>
 24 #include <linux/kernel.h>
 25 #include <linux/notifier.h>
 26 #include <linux/rwsem.h>
 27 #include <linux/slab.h>
 28 #include <linux/fips.h>
 29 
 30 /* Crypto notification events. */
 31 enum {
 32         CRYPTO_MSG_ALG_REQUEST,
 33         CRYPTO_MSG_ALG_REGISTER,
 34         CRYPTO_MSG_ALG_UNREGISTER,
 35         CRYPTO_MSG_TMPL_REGISTER,
 36         CRYPTO_MSG_TMPL_UNREGISTER,
 37 };
 38 
 39 struct crypto_instance;
 40 struct crypto_template;
 41 
 42 struct crypto_larval {
 43         struct crypto_alg alg;
 44         struct crypto_alg *adult;
 45         struct completion completion;
 46         u32 mask;
 47 };
 48 
 49 extern struct list_head crypto_alg_list;
 50 extern struct rw_semaphore crypto_alg_sem;
 51 extern struct blocking_notifier_head crypto_chain;
 52 
 53 #ifdef CONFIG_PROC_FS
 54 void __init crypto_init_proc(void);
 55 void __exit crypto_exit_proc(void);
 56 #else
 57 static inline void crypto_init_proc(void)
 58 { }
 59 static inline void crypto_exit_proc(void)
 60 { }
 61 #endif
 62 
 63 static inline unsigned int crypto_cipher_ctxsize(struct crypto_alg *alg)
 64 {
 65         return alg->cra_ctxsize;
 66 }
 67 
 68 static inline unsigned int crypto_compress_ctxsize(struct crypto_alg *alg)
 69 {
 70         return alg->cra_ctxsize;
 71 }
 72 
 73 struct crypto_alg *crypto_mod_get(struct crypto_alg *alg);
 74 struct crypto_alg *crypto_alg_lookup(const char *name, u32 type, u32 mask);
 75 struct crypto_alg *crypto_alg_mod_lookup(const char *name, u32 type, u32 mask);
 76 
 77 int crypto_init_cipher_ops(struct crypto_tfm *tfm);
 78 int crypto_init_compress_ops(struct crypto_tfm *tfm);
 79 
 80 void crypto_exit_cipher_ops(struct crypto_tfm *tfm);
 81 void crypto_exit_compress_ops(struct crypto_tfm *tfm);
 82 
 83 struct crypto_larval *crypto_larval_alloc(const char *name, u32 type, u32 mask);
 84 void crypto_larval_kill(struct crypto_alg *alg);
 85 struct crypto_alg *crypto_larval_lookup(const char *name, u32 type, u32 mask);
 86 void crypto_alg_tested(const char *name, int err);
 87 
 88 void crypto_remove_spawns(struct crypto_alg *alg, struct list_head *list,
 89                           struct crypto_alg *nalg);
 90 void crypto_remove_final(struct list_head *list);
 91 void crypto_shoot_alg(struct crypto_alg *alg);
 92 struct crypto_tfm *__crypto_alloc_tfm(struct crypto_alg *alg, u32 type,
 93                                       u32 mask);
 94 void *crypto_create_tfm(struct crypto_alg *alg,
 95                         const struct crypto_type *frontend);
 96 struct crypto_alg *crypto_find_alg(const char *alg_name,
 97                                    const struct crypto_type *frontend,
 98                                    u32 type, u32 mask);
 99 void *crypto_alloc_tfm(const char *alg_name,
100                        const struct crypto_type *frontend, u32 type, u32 mask);
101 
102 int crypto_register_notifier(struct notifier_block *nb);
103 int crypto_unregister_notifier(struct notifier_block *nb);
104 int crypto_probing_notify(unsigned long val, void *v);
105 
106 static inline struct crypto_alg *crypto_alg_get(struct crypto_alg *alg)
107 {
108         atomic_inc(&alg->cra_refcnt);
109         return alg;
110 }
111 
112 static inline void crypto_alg_put(struct crypto_alg *alg)
113 {
114         if (atomic_dec_and_test(&alg->cra_refcnt) && alg->cra_destroy)
115                 alg->cra_destroy(alg);
116 }
117 
118 static inline int crypto_tmpl_get(struct crypto_template *tmpl)
119 {
120         return try_module_get(tmpl->module);
121 }
122 
123 static inline void crypto_tmpl_put(struct crypto_template *tmpl)
124 {
125         module_put(tmpl->module);
126 }
127 
128 static inline int crypto_is_larval(struct crypto_alg *alg)
129 {
130         return alg->cra_flags & CRYPTO_ALG_LARVAL;
131 }
132 
133 static inline int crypto_is_dead(struct crypto_alg *alg)
134 {
135         return alg->cra_flags & CRYPTO_ALG_DEAD;
136 }
137 
138 static inline int crypto_is_moribund(struct crypto_alg *alg)
139 {
140         return alg->cra_flags & (CRYPTO_ALG_DEAD | CRYPTO_ALG_DYING);
141 }
142 
143 static inline void crypto_notify(unsigned long val, void *v)
144 {
145         blocking_notifier_call_chain(&crypto_chain, val, v);
146 }
147 
148 #endif  /* _CRYPTO_INTERNAL_H */
149 
150 

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