/*
   * Cryptographic API.
   *
   * Copyright (c) 2002 James Morris <jmorris@intercode.com.au>

   * Copyright (c) 2005 Herbert Xu <herbert@gondor.apana.org.au>

   *
   * This program is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License as published by the Free
   * Software Foundation; either version 2 of the License, or (at your option) 
   * any later version.
   *
   */
  #ifndef _CRYPTO_INTERNAL_H
  #define _CRYPTO_INTERNAL_H

  
  #include <crypto/algapi.h>

  #include <linux/completion.h>

  #include <linux/mm.h>
  #include <linux/highmem.h>
  #include <linux/interrupt.h>
  #include <linux/init.h>

  #include <linux/list.h>

  #include <linux/module.h>

  #include <linux/kernel.h>

  #include <linux/notifier.h>

  #include <linux/rwsem.h>

  #include <linux/slab.h>

  /* Crypto notification events. */
  enum {
  	CRYPTO_MSG_ALG_REQUEST,
  	CRYPTO_MSG_ALG_REGISTER,
  	CRYPTO_MSG_ALG_UNREGISTER,
  	CRYPTO_MSG_TMPL_REGISTER,
  	CRYPTO_MSG_TMPL_UNREGISTER,
  };

  struct crypto_instance;
  struct crypto_template;

  struct crypto_larval {
  	struct crypto_alg alg;
  	struct crypto_alg *adult;
  	struct completion completion;

  	u32 mask;

  };

  extern struct list_head crypto_alg_list;
  extern struct rw_semaphore crypto_alg_sem;

  extern struct blocking_notifier_head crypto_chain;

  #ifdef CONFIG_PROC_FS
  void __init crypto_init_proc(void);

  void __exit crypto_exit_proc(void);

  #else
  static inline void crypto_init_proc(void)
  { }

  static inline void crypto_exit_proc(void)
  { }

  #endif

  static inline unsigned int crypto_digest_ctxsize(struct crypto_alg *alg)

  {

  	unsigned int len = alg->cra_ctxsize;
  
  	if (alg->cra_alignmask) {
  		len = ALIGN(len, (unsigned long)alg->cra_alignmask + 1);
  		len += alg->cra_digest.dia_digestsize;
  	}
  
  	return len;

  }

  static inline unsigned int crypto_cipher_ctxsize(struct crypto_alg *alg)

  {

  	return alg->cra_ctxsize;

  }

  static inline unsigned int crypto_compress_ctxsize(struct crypto_alg *alg)

  {
  	return alg->cra_ctxsize;
  }

  struct crypto_alg *crypto_mod_get(struct crypto_alg *alg);

  struct crypto_alg *__crypto_alg_lookup(const char *name, u32 type, u32 mask);
  struct crypto_alg *crypto_alg_mod_lookup(const char *name, u32 type, u32 mask);

  int crypto_init_digest_ops(struct crypto_tfm *tfm);

  int crypto_init_digest_ops_async(struct crypto_tfm *tfm);

  int crypto_init_cipher_ops(struct crypto_tfm *tfm);
  int crypto_init_compress_ops(struct crypto_tfm *tfm);
  
  void crypto_exit_digest_ops(struct crypto_tfm *tfm);
  void crypto_exit_cipher_ops(struct crypto_tfm *tfm);
  void crypto_exit_compress_ops(struct crypto_tfm *tfm);

  void crypto_larval_kill(struct crypto_alg *alg);
  struct crypto_alg *crypto_larval_lookup(const char *name, u32 type, u32 mask);

  void crypto_larval_error(const char *name, u32 type, u32 mask);

  void crypto_shoot_alg(struct crypto_alg *alg);

  struct crypto_tfm *__crypto_alloc_tfm(struct crypto_alg *alg, u32 type,
  				      u32 mask);

  int crypto_register_instance(struct crypto_template *tmpl,
  			     struct crypto_instance *inst);

  int crypto_register_notifier(struct notifier_block *nb);
  int crypto_unregister_notifier(struct notifier_block *nb);

  static inline void crypto_alg_put(struct crypto_alg *alg)
  {
  	if (atomic_dec_and_test(&alg->cra_refcnt) && alg->cra_destroy)
  		alg->cra_destroy(alg);
  }

  static inline int crypto_tmpl_get(struct crypto_template *tmpl)
  {
  	return try_module_get(tmpl->module);
  }
  
  static inline void crypto_tmpl_put(struct crypto_template *tmpl)
  {
  	module_put(tmpl->module);
  }

  static inline int crypto_is_larval(struct crypto_alg *alg)
  {
  	return alg->cra_flags & CRYPTO_ALG_LARVAL;
  }

  static inline int crypto_is_dead(struct crypto_alg *alg)
  {
  	return alg->cra_flags & CRYPTO_ALG_DEAD;
  }
  
  static inline int crypto_is_moribund(struct crypto_alg *alg)
  {
  	return alg->cra_flags & (CRYPTO_ALG_DEAD | CRYPTO_ALG_DYING);
  }

  static inline int crypto_notify(unsigned long val, void *v)
  {
  	return blocking_notifier_call_chain(&crypto_chain, val, v);
  }

  #endif	/* _CRYPTO_INTERNAL_H */