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