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
  29/* Crypto notification events. */
  30enum {
  31        CRYPTO_MSG_ALG_REQUEST,
  32        CRYPTO_MSG_ALG_REGISTER,
  33        CRYPTO_MSG_ALG_UNREGISTER,
  34        CRYPTO_MSG_TMPL_REGISTER,
  35        CRYPTO_MSG_TMPL_UNREGISTER,
  36};
  37
  38struct crypto_instance;
  39struct crypto_template;
  40
  41struct crypto_larval {
  42        struct crypto_alg alg;
  43        struct crypto_alg *adult;
  44        struct completion completion;
  45        u32 mask;
  46};
  47
  48extern struct list_head crypto_alg_list;
  49extern struct rw_semaphore crypto_alg_sem;
  50extern struct blocking_notifier_head crypto_chain;
  51
  52#ifdef CONFIG_PROC_FS
  53void __init crypto_init_proc(void);
  54void __exit crypto_exit_proc(void);
  55#else
  56static inline void crypto_init_proc(void)
  57{ }
  58static inline void crypto_exit_proc(void)
  59{ }
  60#endif
  61
  62static inline unsigned int crypto_cipher_ctxsize(struct crypto_alg *alg)
  63{
  64        return alg->cra_ctxsize;
  65}
  66
  67static inline unsigned int crypto_compress_ctxsize(struct crypto_alg *alg)
  68{
  69        return alg->cra_ctxsize;
  70}
  71
  72struct crypto_alg *crypto_mod_get(struct crypto_alg *alg);
  73struct crypto_alg *crypto_alg_lookup(const char *name, u32 type, u32 mask);
  74struct crypto_alg *crypto_alg_mod_lookup(const char *name, u32 type, u32 mask);
  75
  76int crypto_init_cipher_ops(struct crypto_tfm *tfm);
  77int crypto_init_compress_ops(struct crypto_tfm *tfm);
  78
  79void crypto_exit_cipher_ops(struct crypto_tfm *tfm);
  80void crypto_exit_compress_ops(struct crypto_tfm *tfm);
  81
  82struct crypto_larval *crypto_larval_alloc(const char *name, u32 type, u32 mask);
  83void crypto_larval_kill(struct crypto_alg *alg);
  84struct crypto_alg *crypto_larval_lookup(const char *name, u32 type, u32 mask);
  85void crypto_alg_tested(const char *name, int err);
  86
  87void crypto_remove_spawns(struct crypto_alg *alg, struct list_head *list,
  88                          struct crypto_alg *nalg);
  89void crypto_remove_final(struct list_head *list);
  90void crypto_shoot_alg(struct crypto_alg *alg);
  91struct crypto_tfm *__crypto_alloc_tfm(struct crypto_alg *alg, u32 type,
  92                                      u32 mask);
  93void *crypto_create_tfm(struct crypto_alg *alg,
  94                        const struct crypto_type *frontend);
  95struct crypto_alg *crypto_find_alg(const char *alg_name,
  96                                   const struct crypto_type *frontend,
  97                                   u32 type, u32 mask);
  98void *crypto_alloc_tfm(const char *alg_name,
  99                       const struct crypto_type *frontend, u32 type, u32 mask);
 100
 101int crypto_register_notifier(struct notifier_block *nb);
 102int crypto_unregister_notifier(struct notifier_block *nb);
 103int crypto_probing_notify(unsigned long val, void *v);
 104
 105unsigned int crypto_alg_extsize(struct crypto_alg *alg);
 106
 107int crypto_type_has_alg(const char *name, const struct crypto_type *frontend,
 108                        u32 type, u32 mask);
 109
 110static inline struct crypto_alg *crypto_alg_get(struct crypto_alg *alg)
 111{
 112        atomic_inc(&alg->cra_refcnt);
 113        return alg;
 114}
 115
 116static inline void crypto_alg_put(struct crypto_alg *alg)
 117{
 118        if (atomic_dec_and_test(&alg->cra_refcnt) && alg->cra_destroy)
 119                alg->cra_destroy(alg);
 120}
 121
 122static inline int crypto_tmpl_get(struct crypto_template *tmpl)
 123{
 124        return try_module_get(tmpl->module);
 125}
 126
 127static inline void crypto_tmpl_put(struct crypto_template *tmpl)
 128{
 129        module_put(tmpl->module);
 130}
 131
 132static inline int crypto_is_larval(struct crypto_alg *alg)
 133{
 134        return alg->cra_flags & CRYPTO_ALG_LARVAL;
 135}
 136
 137static inline int crypto_is_dead(struct crypto_alg *alg)
 138{
 139        return alg->cra_flags & CRYPTO_ALG_DEAD;
 140}
 141
 142static inline int crypto_is_moribund(struct crypto_alg *alg)
 143{
 144        return alg->cra_flags & (CRYPTO_ALG_DEAD | CRYPTO_ALG_DYING);
 145}
 146
 147static inline void crypto_notify(unsigned long val, void *v)
 148{
 149        blocking_notifier_call_chain(&crypto_chain, val, v);
 150}
 151
 152#endif  /* _CRYPTO_INTERNAL_H */
 153
 154