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