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