[linux-2.6-block.git] / crypto / internal.h

/*
 * 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_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_cipher_ops(struct crypto_tfm *tfm);
int crypto_init_compress_ops(struct crypto_tfm *tfm);

void crypto_exit_cipher_ops(struct crypto_tfm *tfm);
void crypto_exit_compress_ops(struct crypto_tfm *tfm);

struct crypto_larval *crypto_larval_alloc(const char *name, u32 type, u32 mask);
void crypto_larval_kill(struct crypto_alg *alg);
struct crypto_alg *crypto_larval_lookup(const char *name, u32 type, u32 mask);
void crypto_alg_tested(const char *name, int err);

void crypto_remove_spawns(struct crypto_alg *alg, struct list_head *list,
			  struct crypto_alg *nalg);
void crypto_remove_final(struct list_head *list);
void crypto_shoot_alg(struct crypto_alg *alg);
struct crypto_tfm *__crypto_alloc_tfm(struct crypto_alg *alg, u32 type,
				      u32 mask);
void *crypto_create_tfm(struct crypto_alg *alg,
			const struct crypto_type *frontend);
struct crypto_alg *crypto_find_alg(const char *alg_name,
				   const struct crypto_type *frontend,
				   u32 type, u32 mask);
void *crypto_alloc_tfm(const char *alg_name,
		       const struct crypto_type *frontend, u32 type, u32 mask);

int crypto_register_notifier(struct notifier_block *nb);
int crypto_unregister_notifier(struct notifier_block *nb);
int crypto_probing_notify(unsigned long val, void *v);

unsigned int crypto_alg_extsize(struct crypto_alg *alg);

int crypto_type_has_alg(const char *name, const struct crypto_type *frontend,
			u32 type, u32 mask);

static inline struct crypto_alg *crypto_alg_get(struct crypto_alg *alg)
{
	atomic_inc(&alg->cra_refcnt);
	return alg;
}

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

#endif	/* _CRYPTO_INTERNAL_H */
Commit	Line	Data
1da177e4 LT	1	/*
	2	* Cryptographic API.
	3	*
	4	* Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
5cb1454b	5	* Copyright (c) 2005 Herbert Xu <herbert@gondor.apana.org.au>
1da177e4 LT	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
269ab459	9	* Software Foundation; either version 2 of the License, or (at your option)
1da177e4 LT	10	* any later version.
	11	*
	12	*/
	13	#ifndef _CRYPTO_INTERNAL_H
	14	#define _CRYPTO_INTERNAL_H
cce9e06d HX	15
cce9e06d HX	16	#include <crypto/algapi.h>
2825982d	17	#include <linux/completion.h>
1da177e4 LT	18	#include <linux/mm.h>
	19	#include <linux/highmem.h>
	20	#include <linux/interrupt.h>
	21	#include <linux/init.h>
5cb1454b	22	#include <linux/list.h>
4cc7720c	23	#include <linux/module.h>
fbdae9f3	24	#include <linux/kernel.h>
2825982d	25	#include <linux/notifier.h>
5cb1454b	26	#include <linux/rwsem.h>
64baf3cf	27	#include <linux/slab.h>
ccb778e1	28
2825982d HX	29	/* Crypto notification events. */
	30	enum {
	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
4cc7720c HX	38	struct crypto_instance;
	39	struct crypto_template;
	40
2825982d HX	41	struct crypto_larval {
	42	struct crypto_alg alg;
	43	struct crypto_alg *adult;
	44	struct completion completion;
492e2b63	45	u32 mask;
2825982d HX	46	};
2825982d HX	47
5cb1454b HX	48	extern struct list_head crypto_alg_list;
5cb1454b HX	49	extern struct rw_semaphore crypto_alg_sem;
2825982d	50	extern struct blocking_notifier_head crypto_chain;
5cb1454b	51
1da177e4 LT	52	#ifdef CONFIG_PROC_FS
1da177e4 LT	53	void __init crypto_init_proc(void);
cce9e06d	54	void __exit crypto_exit_proc(void);
1da177e4 LT	55	#else
	56	static inline void crypto_init_proc(void)
	57	{ }
cce9e06d HX	58	static inline void crypto_exit_proc(void)
cce9e06d HX	59	{ }
1da177e4 LT	60	#endif
1da177e4 LT	61
f1ddcaf3	62	static inline unsigned int crypto_cipher_ctxsize(struct crypto_alg *alg)
fbdae9f3	63	{
f1ddcaf3	64	return alg->cra_ctxsize;
fbdae9f3 HX	65	}
fbdae9f3 HX	66
f1ddcaf3	67	static inline unsigned int crypto_compress_ctxsize(struct crypto_alg *alg)
fbdae9f3 HX	68	{
	69	return alg->cra_ctxsize;
	70	}
	71
2825982d	72	struct crypto_alg crypto_mod_get(struct crypto_alg alg);
c51b6c81	73	struct crypto_alg crypto_alg_lookup(const char name, u32 type, u32 mask);
492e2b63	74	struct crypto_alg crypto_alg_mod_lookup(const char name, u32 type, u32 mask);
2825982d	75
1da177e4 LT	76	int crypto_init_cipher_ops(struct crypto_tfm *tfm);
	77	int crypto_init_compress_ops(struct crypto_tfm *tfm);
	78
1da177e4 LT	79	void crypto_exit_cipher_ops(struct crypto_tfm *tfm);
	80	void crypto_exit_compress_ops(struct crypto_tfm *tfm);
	81
73d3864a	82	struct crypto_larval crypto_larval_alloc(const char name, u32 type, u32 mask);
b9c55aa4 HX	83	void crypto_larval_kill(struct crypto_alg *alg);
b9c55aa4 HX	84	struct crypto_alg crypto_larval_lookup(const char name, u32 type, u32 mask);
73d3864a	85	void crypto_alg_tested(const char *name, int err);
2825982d	86
89b596ba SK	87	void crypto_remove_spawns(struct crypto_alg alg, struct list_head list,
89b596ba SK	88	struct crypto_alg *nalg);
22e5b20b	89	void crypto_remove_final(struct list_head *list);
6bfd4809	90	void crypto_shoot_alg(struct crypto_alg *alg);
27d2a330 HX	91	struct crypto_tfm __crypto_alloc_tfm(struct crypto_alg alg, u32 type,
27d2a330 HX	92	u32 mask);
3f683d61 HX	93	void crypto_create_tfm(struct crypto_alg alg,
3f683d61 HX	94	const struct crypto_type *frontend);
d06854f0 HX	95	struct crypto_alg crypto_find_alg(const char alg_name,
	96	const struct crypto_type *frontend,
	97	u32 type, u32 mask);
3f683d61 HX	98	void crypto_alloc_tfm(const char alg_name,
3f683d61 HX	99	const struct crypto_type *frontend, u32 type, u32 mask);
4cc7720c	100
2825982d HX	101	int crypto_register_notifier(struct notifier_block *nb);
2825982d HX	102	int crypto_unregister_notifier(struct notifier_block *nb);
73d3864a	103	int crypto_probing_notify(unsigned long val, void *v);
2825982d	104
38d21433 HX	105	unsigned int crypto_alg_extsize(struct crypto_alg *alg);
38d21433 HX	106
f2aefdab HX	107	int crypto_type_has_alg(const char name, const struct crypto_type frontend,
	108	u32 type, u32 mask);
	109
939e1779 HX	110	static inline struct crypto_alg crypto_alg_get(struct crypto_alg alg)
	111	{
	112	atomic_inc(&alg->cra_refcnt);
	113	return alg;
	114	}
	115
6bfd4809 HX	116	static 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
4cc7720c HX	122	static inline int crypto_tmpl_get(struct crypto_template *tmpl)
	123	{
	124	return try_module_get(tmpl->module);
	125	}
	126
	127	static inline void crypto_tmpl_put(struct crypto_template *tmpl)
	128	{
	129	module_put(tmpl->module);
	130	}
	131
2825982d HX	132	static inline int crypto_is_larval(struct crypto_alg *alg)
	133	{
	134	return alg->cra_flags & CRYPTO_ALG_LARVAL;
	135	}
	136
6bfd4809 HX	137	static inline int crypto_is_dead(struct crypto_alg *alg)
	138	{
	139	return alg->cra_flags & CRYPTO_ALG_DEAD;
	140	}
	141
	142	static inline int crypto_is_moribund(struct crypto_alg *alg)
	143	{
	144	return alg->cra_flags & (CRYPTO_ALG_DEAD \| CRYPTO_ALG_DYING);
	145	}
	146
73d3864a	147	static inline void crypto_notify(unsigned long val, void *v)
2825982d	148	{
73d3864a	149	blocking_notifier_call_chain(&crypto_chain, val, v);
2825982d HX	150	}
2825982d HX	151
1da177e4 LT	152	#endif /* _CRYPTO_INTERNAL_H */
1da177e4 LT	153