[deliverable/linux.git] / include / crypto / algapi.h

/*
 * Cryptographic API for algorithms (i.e., low-level API).
 *
 * Copyright (c) 2006 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_ALGAPI_H
#define _CRYPTO_ALGAPI_H

#include <linux/crypto.h>
#include <linux/list.h>
#include <linux/kernel.h>
#include <linux/skbuff.h>

struct crypto_aead;
struct crypto_instance;
struct module;
struct rtattr;
struct seq_file;

struct crypto_type {
	unsigned int (*ctxsize)(struct crypto_alg *alg, u32 type, u32 mask);
	unsigned int (*extsize)(struct crypto_alg *alg);
	int (*init)(struct crypto_tfm *tfm, u32 type, u32 mask);
	int (*init_tfm)(struct crypto_tfm *tfm);
	void (*show)(struct seq_file *m, struct crypto_alg *alg);
	int (*report)(struct sk_buff *skb, struct crypto_alg *alg);
	struct crypto_alg *(*lookup)(const char *name, u32 type, u32 mask);
	void (*free)(struct crypto_instance *inst);

	unsigned int type;
	unsigned int maskclear;
	unsigned int maskset;
	unsigned int tfmsize;
};

struct crypto_instance {
	struct crypto_alg alg;

	struct crypto_template *tmpl;
	struct hlist_node list;

	void *__ctx[] CRYPTO_MINALIGN_ATTR;
};

struct crypto_template {
	struct list_head list;
	struct hlist_head instances;
	struct module *module;

	struct crypto_instance *(*alloc)(struct rtattr **tb);
	void (*free)(struct crypto_instance *inst);
	int (*create)(struct crypto_template *tmpl, struct rtattr **tb);

	char name[CRYPTO_MAX_ALG_NAME];
};

struct crypto_spawn {
	struct list_head list;
	struct crypto_alg *alg;
	struct crypto_instance *inst;
	const struct crypto_type *frontend;
	u32 mask;
};

struct crypto_queue {
	struct list_head list;
	struct list_head *backlog;

	unsigned int qlen;
	unsigned int max_qlen;
};

struct scatter_walk {
	struct scatterlist *sg;
	unsigned int offset;
};

struct blkcipher_walk {
	union {
		struct {
			struct page *page;
			unsigned long offset;
		} phys;

		struct {
			u8 *page;
			u8 *addr;
		} virt;
	} src, dst;

	struct scatter_walk in;
	unsigned int nbytes;

	struct scatter_walk out;
	unsigned int total;

	void *page;
	u8 *buffer;
	u8 *iv;
	unsigned int ivsize;

	int flags;
	unsigned int walk_blocksize;
	unsigned int cipher_blocksize;
	unsigned int alignmask;
};

struct ablkcipher_walk {
	struct {
		struct page *page;
		unsigned int offset;
	} src, dst;

	struct scatter_walk	in;
	unsigned int		nbytes;
	struct scatter_walk	out;
	unsigned int		total;
	struct list_head	buffers;
	u8			*iv_buffer;
	u8			*iv;
	int			flags;
	unsigned int		blocksize;
};

extern const struct crypto_type crypto_ablkcipher_type;
extern const struct crypto_type crypto_blkcipher_type;

void crypto_mod_put(struct crypto_alg *alg);

int crypto_register_template(struct crypto_template *tmpl);
void crypto_unregister_template(struct crypto_template *tmpl);
struct crypto_template *crypto_lookup_template(const char *name);

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

int crypto_init_spawn(struct crypto_spawn *spawn, struct crypto_alg *alg,
		      struct crypto_instance *inst, u32 mask);
int crypto_init_spawn2(struct crypto_spawn *spawn, struct crypto_alg *alg,
		       struct crypto_instance *inst,
		       const struct crypto_type *frontend);
int crypto_grab_spawn(struct crypto_spawn *spawn, const char *name,
		      u32 type, u32 mask);

void crypto_drop_spawn(struct crypto_spawn *spawn);
struct crypto_tfm *crypto_spawn_tfm(struct crypto_spawn *spawn, u32 type,
				    u32 mask);
void *crypto_spawn_tfm2(struct crypto_spawn *spawn);

static inline void crypto_set_spawn(struct crypto_spawn *spawn,
				    struct crypto_instance *inst)
{
	spawn->inst = inst;
}

struct crypto_attr_type *crypto_get_attr_type(struct rtattr **tb);
int crypto_check_attr_type(struct rtattr **tb, u32 type);
const char *crypto_attr_alg_name(struct rtattr *rta);
struct crypto_alg *crypto_attr_alg2(struct rtattr *rta,
				    const struct crypto_type *frontend,
				    u32 type, u32 mask);

static inline struct crypto_alg *crypto_attr_alg(struct rtattr *rta,
						 u32 type, u32 mask)
{
	return crypto_attr_alg2(rta, NULL, type, mask);
}

int crypto_attr_u32(struct rtattr *rta, u32 *num);
int crypto_inst_setname(struct crypto_instance *inst, const char *name,
			struct crypto_alg *alg);
void *crypto_alloc_instance2(const char *name, struct crypto_alg *alg,
			     unsigned int head);
struct crypto_instance *crypto_alloc_instance(const char *name,
					      struct crypto_alg *alg);

void crypto_init_queue(struct crypto_queue *queue, unsigned int max_qlen);
int crypto_enqueue_request(struct crypto_queue *queue,
			   struct crypto_async_request *request);
struct crypto_async_request *crypto_dequeue_request(struct crypto_queue *queue);
int crypto_tfm_in_queue(struct crypto_queue *queue, struct crypto_tfm *tfm);
static inline unsigned int crypto_queue_len(struct crypto_queue *queue)
{
	return queue->qlen;
}

/* These functions require the input/output to be aligned as u32. */
void crypto_inc(u8 *a, unsigned int size);
void crypto_xor(u8 *dst, const u8 *src, unsigned int size);

int blkcipher_walk_done(struct blkcipher_desc *desc,
			struct blkcipher_walk *walk, int err);
int blkcipher_walk_virt(struct blkcipher_desc *desc,
			struct blkcipher_walk *walk);
int blkcipher_walk_phys(struct blkcipher_desc *desc,
			struct blkcipher_walk *walk);
int blkcipher_walk_virt_block(struct blkcipher_desc *desc,
			      struct blkcipher_walk *walk,
			      unsigned int blocksize);
int blkcipher_aead_walk_virt_block(struct blkcipher_desc *desc,
				   struct blkcipher_walk *walk,
				   struct crypto_aead *tfm,
				   unsigned int blocksize);

int ablkcipher_walk_done(struct ablkcipher_request *req,
			 struct ablkcipher_walk *walk, int err);
int ablkcipher_walk_phys(struct ablkcipher_request *req,
			 struct ablkcipher_walk *walk);
void __ablkcipher_walk_complete(struct ablkcipher_walk *walk);

static inline void *crypto_tfm_ctx_aligned(struct crypto_tfm *tfm)
{
	return PTR_ALIGN(crypto_tfm_ctx(tfm),
			 crypto_tfm_alg_alignmask(tfm) + 1);
}

static inline struct crypto_instance *crypto_tfm_alg_instance(
	struct crypto_tfm *tfm)
{
	return container_of(tfm->__crt_alg, struct crypto_instance, alg);
}

static inline void *crypto_instance_ctx(struct crypto_instance *inst)
{
	return inst->__ctx;
}

static inline struct ablkcipher_alg *crypto_ablkcipher_alg(
	struct crypto_ablkcipher *tfm)
{
	return &crypto_ablkcipher_tfm(tfm)->__crt_alg->cra_ablkcipher;
}

static inline void *crypto_ablkcipher_ctx(struct crypto_ablkcipher *tfm)
{
	return crypto_tfm_ctx(&tfm->base);
}

static inline void *crypto_ablkcipher_ctx_aligned(struct crypto_ablkcipher *tfm)
{
	return crypto_tfm_ctx_aligned(&tfm->base);
}

static inline struct crypto_blkcipher *crypto_spawn_blkcipher(
	struct crypto_spawn *spawn)
{
	u32 type = CRYPTO_ALG_TYPE_BLKCIPHER;
	u32 mask = CRYPTO_ALG_TYPE_MASK;

	return __crypto_blkcipher_cast(crypto_spawn_tfm(spawn, type, mask));
}

static inline void *crypto_blkcipher_ctx(struct crypto_blkcipher *tfm)
{
	return crypto_tfm_ctx(&tfm->base);
}

static inline void *crypto_blkcipher_ctx_aligned(struct crypto_blkcipher *tfm)
{
	return crypto_tfm_ctx_aligned(&tfm->base);
}

static inline struct crypto_cipher *crypto_spawn_cipher(
	struct crypto_spawn *spawn)
{
	u32 type = CRYPTO_ALG_TYPE_CIPHER;
	u32 mask = CRYPTO_ALG_TYPE_MASK;

	return __crypto_cipher_cast(crypto_spawn_tfm(spawn, type, mask));
}

static inline struct cipher_alg *crypto_cipher_alg(struct crypto_cipher *tfm)
{
	return &crypto_cipher_tfm(tfm)->__crt_alg->cra_cipher;
}

static inline void blkcipher_walk_init(struct blkcipher_walk *walk,
				       struct scatterlist *dst,
				       struct scatterlist *src,
				       unsigned int nbytes)
{
	walk->in.sg = src;
	walk->out.sg = dst;
	walk->total = nbytes;
}

static inline void ablkcipher_walk_init(struct ablkcipher_walk *walk,
					struct scatterlist *dst,
					struct scatterlist *src,
					unsigned int nbytes)
{
	walk->in.sg = src;
	walk->out.sg = dst;
	walk->total = nbytes;
	INIT_LIST_HEAD(&walk->buffers);
}

static inline void ablkcipher_walk_complete(struct ablkcipher_walk *walk)
{
	if (unlikely(!list_empty(&walk->buffers)))
		__ablkcipher_walk_complete(walk);
}

static inline struct crypto_async_request *crypto_get_backlog(
	struct crypto_queue *queue)
{
	return queue->backlog == &queue->list ? NULL :
	       container_of(queue->backlog, struct crypto_async_request, list);
}

static inline int ablkcipher_enqueue_request(struct crypto_queue *queue,
					     struct ablkcipher_request *request)
{
	return crypto_enqueue_request(queue, &request->base);
}

static inline struct ablkcipher_request *ablkcipher_dequeue_request(
	struct crypto_queue *queue)
{
	return ablkcipher_request_cast(crypto_dequeue_request(queue));
}

static inline void *ablkcipher_request_ctx(struct ablkcipher_request *req)
{
	return req->__ctx;
}

static inline int ablkcipher_tfm_in_queue(struct crypto_queue *queue,
					  struct crypto_ablkcipher *tfm)
{
	return crypto_tfm_in_queue(queue, crypto_ablkcipher_tfm(tfm));
}

static inline struct crypto_alg *crypto_get_attr_alg(struct rtattr **tb,
						     u32 type, u32 mask)
{
	return crypto_attr_alg(tb[1], type, mask);
}

/*
 * Returns CRYPTO_ALG_ASYNC if type/mask requires the use of sync algorithms.
 * Otherwise returns zero.
 */
static inline int crypto_requires_sync(u32 type, u32 mask)
{
	return (type ^ CRYPTO_ALG_ASYNC) & mask & CRYPTO_ALG_ASYNC;
}

noinline unsigned long __crypto_memneq(const void *a, const void *b, size_t size);

/**
 * crypto_memneq - Compare two areas of memory without leaking
 *		   timing information.
 *
 * @a: One area of memory
 * @b: Another area of memory
 * @size: The size of the area.
 *
 * Returns 0 when data is equal, 1 otherwise.
 */
static inline int crypto_memneq(const void *a, const void *b, size_t size)
{
	return __crypto_memneq(a, b, size) != 0UL ? 1 : 0;
}

static inline void crypto_yield(u32 flags)
{
#if !defined(CONFIG_PREEMPT) || defined(CONFIG_PREEMPT_VOLUNTARY)
	if (flags & CRYPTO_TFM_REQ_MAY_SLEEP)
		cond_resched();
#endif
}

#endif	/* _CRYPTO_ALGAPI_H */
Commit	Line	Data
cce9e06d HX	1	/*
	2	* Cryptographic API for algorithms (i.e., low-level API).
	3	*
	4	* Copyright (c) 2006 Herbert Xu <herbert@gondor.apana.org.au>
	5	*
	6	* This program is free software; you can redistribute it and/or modify it
	7	* under the terms of the GNU General Public License as published by the Free
	8	* Software Foundation; either version 2 of the License, or (at your option)
	9	* any later version.
	10	*
	11	*/
	12	#ifndef _CRYPTO_ALGAPI_H
	13	#define _CRYPTO_ALGAPI_H
	14
	15	#include <linux/crypto.h>
b5b7f088 HX	16	#include <linux/list.h>
b5b7f088 HX	17	#include <linux/kernel.h>
b6aa63c0	18	#include <linux/skbuff.h>
cce9e06d	19
5d1d65f8	20	struct crypto_aead;
319382a6	21	struct crypto_instance;
4cc7720c	22	struct module;
ebc610e5	23	struct rtattr;
e853c3cf HX	24	struct seq_file;
	25
	26	struct crypto_type {
27d2a330	27	unsigned int (ctxsize)(struct crypto_alg alg, u32 type, u32 mask);
2ca33da1	28	unsigned int (extsize)(struct crypto_alg alg);
27d2a330	29	int (init)(struct crypto_tfm tfm, u32 type, u32 mask);
2ca33da1	30	int (init_tfm)(struct crypto_tfm tfm);
e853c3cf	31	void (show)(struct seq_file m, struct crypto_alg *alg);
b6aa63c0	32	int (report)(struct sk_buff skb, struct crypto_alg *alg);
7b0bac64	33	struct crypto_alg (lookup)(const char *name, u32 type, u32 mask);
319382a6	34	void (free)(struct crypto_instance inst);
7b0bac64 HX	35
	36	unsigned int type;
	37	unsigned int maskclear;
	38	unsigned int maskset;
	39	unsigned int tfmsize;
e853c3cf	40	};
4cc7720c HX	41
	42	struct crypto_instance {
	43	struct crypto_alg alg;
	44
	45	struct crypto_template *tmpl;
	46	struct hlist_node list;
	47
	48	void *__ctx[] CRYPTO_MINALIGN_ATTR;
	49	};
	50
	51	struct crypto_template {
	52	struct list_head list;
	53	struct hlist_head instances;
	54	struct module *module;
	55
ebc610e5	56	struct crypto_instance (alloc)(struct rtattr **tb);
4cc7720c	57	void (free)(struct crypto_instance inst);
f2ac72e8	58	int (create)(struct crypto_template tmpl, struct rtattr **tb);
4cc7720c HX	59
	60	char name[CRYPTO_MAX_ALG_NAME];
	61	};
	62
6bfd4809 HX	63	struct crypto_spawn {
	64	struct list_head list;
	65	struct crypto_alg *alg;
	66	struct crypto_instance *inst;
97eedce1	67	const struct crypto_type *frontend;
a73e6996	68	u32 mask;
6bfd4809 HX	69	};
6bfd4809 HX	70
b5b7f088 HX	71	struct crypto_queue {
	72	struct list_head list;
	73	struct list_head *backlog;
	74
	75	unsigned int qlen;
	76	unsigned int max_qlen;
	77	};
	78
5c64097a HX	79	struct scatter_walk {
	80	struct scatterlist *sg;
	81	unsigned int offset;
	82	};
	83
5cde0af2 HX	84	struct blkcipher_walk {
	85	union {
	86	struct {
	87	struct page *page;
	88	unsigned long offset;
	89	} phys;
	90
	91	struct {
	92	u8 *page;
	93	u8 *addr;
	94	} virt;
	95	} src, dst;
	96
	97	struct scatter_walk in;
	98	unsigned int nbytes;
	99
	100	struct scatter_walk out;
	101	unsigned int total;
	102
	103	void *page;
	104	u8 *buffer;
	105	u8 *iv;
822be00f	106	unsigned int ivsize;
5cde0af2 HX	107
5cde0af2 HX	108	int flags;
822be00f AB	109	unsigned int walk_blocksize;
	110	unsigned int cipher_blocksize;
	111	unsigned int alignmask;
5cde0af2 HX	112	};
5cde0af2 HX	113
bf06099d DM	114	struct ablkcipher_walk {
	115	struct {
	116	struct page *page;
	117	unsigned int offset;
	118	} src, dst;
	119
	120	struct scatter_walk in;
	121	unsigned int nbytes;
	122	struct scatter_walk out;
	123	unsigned int total;
	124	struct list_head buffers;
	125	u8 *iv_buffer;
	126	u8 *iv;
	127	int flags;
	128	unsigned int blocksize;
	129	};
	130
b5b7f088	131	extern const struct crypto_type crypto_ablkcipher_type;
5cde0af2 HX	132	extern const struct crypto_type crypto_blkcipher_type;
5cde0af2 HX	133
db131ef9 HX	134	void crypto_mod_put(struct crypto_alg *alg);
db131ef9 HX	135
4cc7720c HX	136	int crypto_register_template(struct crypto_template *tmpl);
	137	void crypto_unregister_template(struct crypto_template *tmpl);
	138	struct crypto_template crypto_lookup_template(const char name);
	139
9cd899a3 HX	140	int crypto_register_instance(struct crypto_template *tmpl,
9cd899a3 HX	141	struct crypto_instance *inst);
87b16756	142	int crypto_unregister_instance(struct crypto_instance *inst);
9cd899a3	143
6bfd4809	144	int crypto_init_spawn(struct crypto_spawn spawn, struct crypto_alg alg,
a73e6996	145	struct crypto_instance *inst, u32 mask);
97eedce1 HX	146	int crypto_init_spawn2(struct crypto_spawn spawn, struct crypto_alg alg,
	147	struct crypto_instance *inst,
	148	const struct crypto_type *frontend);
d6ef2f19 HX	149	int crypto_grab_spawn(struct crypto_spawn spawn, const char name,
d6ef2f19 HX	150	u32 type, u32 mask);
97eedce1	151
6bfd4809	152	void crypto_drop_spawn(struct crypto_spawn *spawn);
2e306ee0 HX	153	struct crypto_tfm crypto_spawn_tfm(struct crypto_spawn spawn, u32 type,
2e306ee0 HX	154	u32 mask);
97eedce1	155	void crypto_spawn_tfm2(struct crypto_spawn spawn);
6bfd4809	156
378f4f51 HX	157	static inline void crypto_set_spawn(struct crypto_spawn *spawn,
	158	struct crypto_instance *inst)
	159	{
	160	spawn->inst = inst;
	161	}
	162
ebc610e5 HX	163	struct crypto_attr_type crypto_get_attr_type(struct rtattr *tb);
ebc610e5 HX	164	int crypto_check_attr_type(struct rtattr **tb, u32 type);
68b6c7d6	165	const char crypto_attr_alg_name(struct rtattr rta);
d06854f0 HX	166	struct crypto_alg crypto_attr_alg2(struct rtattr rta,
	167	const struct crypto_type *frontend,
	168	u32 type, u32 mask);
	169
	170	static inline struct crypto_alg crypto_attr_alg(struct rtattr rta,
	171	u32 type, u32 mask)
	172	{
	173	return crypto_attr_alg2(rta, NULL, type, mask);
	174	}
	175
3c09f17c	176	int crypto_attr_u32(struct rtattr rta, u32 num);
32f27c74 HX	177	int crypto_inst_setname(struct crypto_instance inst, const char name,
32f27c74 HX	178	struct crypto_alg *alg);
70ec7bb9 HX	179	void crypto_alloc_instance2(const char name, struct crypto_alg *alg,
70ec7bb9 HX	180	unsigned int head);
7fed0bf2 HX	181	struct crypto_instance crypto_alloc_instance(const char name,
	182	struct crypto_alg *alg);
	183
b5b7f088 HX	184	void crypto_init_queue(struct crypto_queue *queue, unsigned int max_qlen);
	185	int crypto_enqueue_request(struct crypto_queue *queue,
	186	struct crypto_async_request *request);
	187	struct crypto_async_request crypto_dequeue_request(struct crypto_queue queue);
	188	int crypto_tfm_in_queue(struct crypto_queue queue, struct crypto_tfm tfm);
9f93a8a0 BW	189	static inline unsigned int crypto_queue_len(struct crypto_queue *queue)
	190	{
	191	return queue->qlen;
	192	}
b5b7f088	193
7613636d HX	194	/* These functions require the input/output to be aligned as u32. */
	195	void crypto_inc(u8 *a, unsigned int size);
	196	void crypto_xor(u8 dst, const u8 src, unsigned int size);
	197
5cde0af2 HX	198	int blkcipher_walk_done(struct blkcipher_desc *desc,
	199	struct blkcipher_walk *walk, int err);
	200	int blkcipher_walk_virt(struct blkcipher_desc *desc,
	201	struct blkcipher_walk *walk);
	202	int blkcipher_walk_phys(struct blkcipher_desc *desc,
	203	struct blkcipher_walk *walk);
7607bd8f HX	204	int blkcipher_walk_virt_block(struct blkcipher_desc *desc,
	205	struct blkcipher_walk *walk,
	206	unsigned int blocksize);
4f7f1d7c AB	207	int blkcipher_aead_walk_virt_block(struct blkcipher_desc *desc,
	208	struct blkcipher_walk *walk,
	209	struct crypto_aead *tfm,
	210	unsigned int blocksize);
5cde0af2	211
bf06099d DM	212	int ablkcipher_walk_done(struct ablkcipher_request *req,
	213	struct ablkcipher_walk *walk, int err);
	214	int ablkcipher_walk_phys(struct ablkcipher_request *req,
	215	struct ablkcipher_walk *walk);
	216	void __ablkcipher_walk_complete(struct ablkcipher_walk *walk);
	217
5cde0af2 HX	218	static inline void crypto_tfm_ctx_aligned(struct crypto_tfm tfm)
5cde0af2 HX	219	{
ab300465 HX	220	return PTR_ALIGN(crypto_tfm_ctx(tfm),
ab300465 HX	221	crypto_tfm_alg_alignmask(tfm) + 1);
5cde0af2 HX	222	}
5cde0af2 HX	223
124b53d0 HX	224	static inline struct crypto_instance *crypto_tfm_alg_instance(
	225	struct crypto_tfm *tfm)
	226	{
	227	return container_of(tfm->__crt_alg, struct crypto_instance, alg);
	228	}
	229
4cc7720c HX	230	static inline void crypto_instance_ctx(struct crypto_instance inst)
	231	{
	232	return inst->__ctx;
	233	}
	234
b5b7f088 HX	235	static inline struct ablkcipher_alg *crypto_ablkcipher_alg(
	236	struct crypto_ablkcipher *tfm)
	237	{
	238	return &crypto_ablkcipher_tfm(tfm)->__crt_alg->cra_ablkcipher;
	239	}
	240
	241	static inline void crypto_ablkcipher_ctx(struct crypto_ablkcipher tfm)
	242	{
	243	return crypto_tfm_ctx(&tfm->base);
	244	}
	245
aa379a6a SS	246	static inline void crypto_ablkcipher_ctx_aligned(struct crypto_ablkcipher tfm)
	247	{
	248	return crypto_tfm_ctx_aligned(&tfm->base);
	249	}
	250
124b53d0 HX	251	static inline struct crypto_blkcipher *crypto_spawn_blkcipher(
	252	struct crypto_spawn *spawn)
	253	{
	254	u32 type = CRYPTO_ALG_TYPE_BLKCIPHER;
332f8840	255	u32 mask = CRYPTO_ALG_TYPE_MASK;
124b53d0 HX	256
	257	return __crypto_blkcipher_cast(crypto_spawn_tfm(spawn, type, mask));
	258	}
	259
5cde0af2 HX	260	static inline void crypto_blkcipher_ctx(struct crypto_blkcipher tfm)
	261	{
	262	return crypto_tfm_ctx(&tfm->base);
	263	}
	264
	265	static inline void crypto_blkcipher_ctx_aligned(struct crypto_blkcipher tfm)
	266	{
	267	return crypto_tfm_ctx_aligned(&tfm->base);
	268	}
	269
2e306ee0 HX	270	static inline struct crypto_cipher *crypto_spawn_cipher(
	271	struct crypto_spawn *spawn)
	272	{
	273	u32 type = CRYPTO_ALG_TYPE_CIPHER;
	274	u32 mask = CRYPTO_ALG_TYPE_MASK;
	275
	276	return __crypto_cipher_cast(crypto_spawn_tfm(spawn, type, mask));
	277	}
	278
f28776a3 HX	279	static inline struct cipher_alg crypto_cipher_alg(struct crypto_cipher tfm)
	280	{
	281	return &crypto_cipher_tfm(tfm)->__crt_alg->cra_cipher;
	282	}
	283
5cde0af2 HX	284	static inline void blkcipher_walk_init(struct blkcipher_walk *walk,
	285	struct scatterlist *dst,
	286	struct scatterlist *src,
	287	unsigned int nbytes)
	288	{
	289	walk->in.sg = src;
	290	walk->out.sg = dst;
	291	walk->total = nbytes;
	292	}
	293
bf06099d DM	294	static inline void ablkcipher_walk_init(struct ablkcipher_walk *walk,
	295	struct scatterlist *dst,
	296	struct scatterlist *src,
	297	unsigned int nbytes)
	298	{
	299	walk->in.sg = src;
	300	walk->out.sg = dst;
	301	walk->total = nbytes;
	302	INIT_LIST_HEAD(&walk->buffers);
	303	}
	304
	305	static inline void ablkcipher_walk_complete(struct ablkcipher_walk *walk)
	306	{
	307	if (unlikely(!list_empty(&walk->buffers)))
	308	__ablkcipher_walk_complete(walk);
	309	}
	310
b5b7f088 HX	311	static inline struct crypto_async_request *crypto_get_backlog(
	312	struct crypto_queue *queue)
	313	{
	314	return queue->backlog == &queue->list ? NULL :
	315	container_of(queue->backlog, struct crypto_async_request, list);
	316	}
	317
2de98e75	318	static inline int ablkcipher_enqueue_request(struct crypto_queue *queue,
b5b7f088 HX	319	struct ablkcipher_request *request)
b5b7f088 HX	320	{
2de98e75	321	return crypto_enqueue_request(queue, &request->base);
b5b7f088 HX	322	}
	323
	324	static inline struct ablkcipher_request *ablkcipher_dequeue_request(
2de98e75	325	struct crypto_queue *queue)
b5b7f088	326	{
2de98e75	327	return ablkcipher_request_cast(crypto_dequeue_request(queue));
b5b7f088 HX	328	}
	329
	330	static inline void ablkcipher_request_ctx(struct ablkcipher_request req)
	331	{
	332	return req->__ctx;
	333	}
	334
2de98e75 HX	335	static inline int ablkcipher_tfm_in_queue(struct crypto_queue *queue,
2de98e75 HX	336	struct crypto_ablkcipher *tfm)
b5b7f088	337	{
2de98e75	338	return crypto_tfm_in_queue(queue, crypto_ablkcipher_tfm(tfm));
b5b7f088 HX	339	}
b5b7f088 HX	340
3c09f17c HX	341	static inline struct crypto_alg crypto_get_attr_alg(struct rtattr *tb,
	342	u32 type, u32 mask)
	343	{
	344	return crypto_attr_alg(tb[1], type, mask);
	345	}
	346
378f4f51 HX	347	/*
	348	* Returns CRYPTO_ALG_ASYNC if type/mask requires the use of sync algorithms.
	349	* Otherwise returns zero.
	350	*/
	351	static inline int crypto_requires_sync(u32 type, u32 mask)
	352	{
	353	return (type ^ CRYPTO_ALG_ASYNC) & mask & CRYPTO_ALG_ASYNC;
	354	}
	355
6bf37e5a JY	356	noinline unsigned long __crypto_memneq(const void a, const void b, size_t size);
	357
	358	/**
	359	* crypto_memneq - Compare two areas of memory without leaking
	360	* timing information.
	361	*
	362	* @a: One area of memory
	363	* @b: Another area of memory
	364	* @size: The size of the area.
	365	*
	366	* Returns 0 when data is equal, 1 otherwise.
	367	*/
	368	static inline int crypto_memneq(const void a, const void b, size_t size)
	369	{
	370	return __crypto_memneq(a, b, size) != 0UL ? 1 : 0;
	371	}
cce9e06d	372
bb55a4c1 MV	373	static inline void crypto_yield(u32 flags)
bb55a4c1 MV	374	{
41401397	375	#if !defined(CONFIG_PREEMPT) \|\| defined(CONFIG_PREEMPT_VOLUNTARY)
bb55a4c1 MV	376	if (flags & CRYPTO_TFM_REQ_MAY_SLEEP)
bb55a4c1 MV	377	cond_resched();
41401397	378	#endif
bb55a4c1 MV	379	}
bb55a4c1 MV	380
6bf37e5a	381	#endif /* _CRYPTO_ALGAPI_H */