crypto/internal.h

   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
  29 /* Crypto notification events. */
  30 enum {
  31         CRYPTO_MSG_ALG_REQUEST,
  32         CRYPTO_MSG_ALG_REGISTER,
  33 };
  34
  35 struct crypto_instance;
  36 struct crypto_template;
  37
  38 struct crypto_larval {
  39         struct crypto_alg alg;
  40         struct crypto_alg *adult;
  41         struct completion completion;
  42         u32 mask;
  43 };
  44
  45 extern struct list_head crypto_alg_list;
  46 extern struct rw_semaphore crypto_alg_sem;
  47 extern struct blocking_notifier_head crypto_chain;
  48
  49 #ifdef CONFIG_PROC_FS
  50 void __init crypto_init_proc(void);
  51 void __exit crypto_exit_proc(void);
  52 #else
  53 static inline void crypto_init_proc(void)
  54 { }
  55 static inline void crypto_exit_proc(void)
  56 { }
  57 #endif
  58
  59 static inline unsigned int crypto_cipher_ctxsize(struct crypto_alg *alg)
  60 {
  61         return alg->cra_ctxsize;
  62 }
  63
  64 static inline unsigned int crypto_compress_ctxsize(struct crypto_alg *alg)
  65 {
  66         return alg->cra_ctxsize;
  67 }
  68
  69 struct crypto_alg *crypto_mod_get(struct crypto_alg *alg);
  70 struct crypto_alg *crypto_alg_lookup(const char *name, u32 type, u32 mask);
  71 struct crypto_alg *crypto_alg_mod_lookup(const char *name, u32 type, u32 mask);
  72
  73 int crypto_init_cipher_ops(struct crypto_tfm *tfm);
  74 int crypto_init_compress_ops(struct crypto_tfm *tfm);
  75
  76 struct crypto_larval *crypto_larval_alloc(const char *name, u32 type, u32 mask);
  77 void crypto_larval_kill(struct crypto_alg *alg);
  78 void crypto_alg_tested(const char *name, int err);
  79
  80 void crypto_remove_spawns(struct crypto_alg *alg, struct list_head *list,
  81                           struct crypto_alg *nalg);
  82 void crypto_remove_final(struct list_head *list);
  83 void crypto_shoot_alg(struct crypto_alg *alg);
  84 struct crypto_tfm *__crypto_alloc_tfm(struct crypto_alg *alg, u32 type,
  85                                       u32 mask);
  86 void *crypto_create_tfm(struct crypto_alg *alg,
  87                         const struct crypto_type *frontend);
  88 struct crypto_alg *crypto_find_alg(const char *alg_name,
  89                                    const struct crypto_type *frontend,
  90                                    u32 type, u32 mask);
  91 void *crypto_alloc_tfm(const char *alg_name,
  92                        const struct crypto_type *frontend, u32 type, u32 mask);
  93
  94 int crypto_register_notifier(struct notifier_block *nb);
  95 int crypto_unregister_notifier(struct notifier_block *nb);
  96 int crypto_probing_notify(unsigned long val, void *v);
  97
  98 unsigned int crypto_alg_extsize(struct crypto_alg *alg);
  99
 100 int crypto_type_has_alg(const char *name, const struct crypto_type *frontend,
 101                         u32 type, u32 mask);
 102
 103 static inline struct crypto_alg *crypto_alg_get(struct crypto_alg *alg)
 104 {
 105         refcount_inc(&alg->cra_refcnt);
 106         return alg;
 107 }
 108
 109 static inline void crypto_alg_put(struct crypto_alg *alg)
 110 {
 111         if (refcount_dec_and_test(&alg->cra_refcnt) && alg->cra_destroy)
 112                 alg->cra_destroy(alg);
 113 }
 114
 115 static inline int crypto_tmpl_get(struct crypto_template *tmpl)
 116 {
 117         return try_module_get(tmpl->module);
 118 }
 119
 120 static inline void crypto_tmpl_put(struct crypto_template *tmpl)
 121 {
 122         module_put(tmpl->module);
 123 }
 124
 125 static inline int crypto_is_larval(struct crypto_alg *alg)
 126 {
 127         return alg->cra_flags & CRYPTO_ALG_LARVAL;
 128 }
 129
 130 static inline int crypto_is_dead(struct crypto_alg *alg)
 131 {
 132         return alg->cra_flags & CRYPTO_ALG_DEAD;
 133 }
 134
 135 static inline int crypto_is_moribund(struct crypto_alg *alg)
 136 {
 137         return alg->cra_flags & (CRYPTO_ALG_DEAD | CRYPTO_ALG_DYING);
 138 }
 139
 140 static inline void crypto_notify(unsigned long val, void *v)
 141 {
 142         blocking_notifier_call_chain(&crypto_chain, val, v);
 143 }
 144
 145 #endif  /* _CRYPTO_INTERNAL_H */
 146