[linux-block.git] / crypto / pcrypt.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * pcrypt - Parallel crypto wrapper.
 *
 * Copyright (C) 2009 secunet Security Networks AG
 * Copyright (C) 2009 Steffen Klassert <steffen.klassert@secunet.com>
 */

#include <crypto/algapi.h>
#include <crypto/internal/aead.h>
#include <linux/atomic.h>
#include <linux/err.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/kobject.h>
#include <linux/cpu.h>
#include <crypto/pcrypt.h>

static struct padata_instance *pencrypt;
static struct padata_instance *pdecrypt;
static struct kset           *pcrypt_kset;

struct pcrypt_instance_ctx {
	struct crypto_aead_spawn spawn;
	struct padata_shell *psenc;
	struct padata_shell *psdec;
	atomic_t tfm_count;
};

struct pcrypt_aead_ctx {
	struct crypto_aead *child;
	unsigned int cb_cpu;
};

static inline struct pcrypt_instance_ctx *pcrypt_tfm_ictx(
	struct crypto_aead *tfm)
{
	return aead_instance_ctx(aead_alg_instance(tfm));
}

static int pcrypt_aead_setkey(struct crypto_aead *parent,
			      const u8 *key, unsigned int keylen)
{
	struct pcrypt_aead_ctx *ctx = crypto_aead_ctx(parent);

	return crypto_aead_setkey(ctx->child, key, keylen);
}

static int pcrypt_aead_setauthsize(struct crypto_aead *parent,
				   unsigned int authsize)
{
	struct pcrypt_aead_ctx *ctx = crypto_aead_ctx(parent);

	return crypto_aead_setauthsize(ctx->child, authsize);
}

static void pcrypt_aead_serial(struct padata_priv *padata)
{
	struct pcrypt_request *preq = pcrypt_padata_request(padata);
	struct aead_request *req = pcrypt_request_ctx(preq);

	aead_request_complete(req->base.data, padata->info);
}

static void pcrypt_aead_done(struct crypto_async_request *areq, int err)
{
	struct aead_request *req = areq->data;
	struct pcrypt_request *preq = aead_request_ctx(req);
	struct padata_priv *padata = pcrypt_request_padata(preq);

	padata->info = err;

	padata_do_serial(padata);
}

static void pcrypt_aead_enc(struct padata_priv *padata)
{
	struct pcrypt_request *preq = pcrypt_padata_request(padata);
	struct aead_request *req = pcrypt_request_ctx(preq);

	padata->info = crypto_aead_encrypt(req);

	if (padata->info == -EINPROGRESS)
		return;

	padata_do_serial(padata);
}

static int pcrypt_aead_encrypt(struct aead_request *req)
{
	int err;
	struct pcrypt_request *preq = aead_request_ctx(req);
	struct aead_request *creq = pcrypt_request_ctx(preq);
	struct padata_priv *padata = pcrypt_request_padata(preq);
	struct crypto_aead *aead = crypto_aead_reqtfm(req);
	struct pcrypt_aead_ctx *ctx = crypto_aead_ctx(aead);
	u32 flags = aead_request_flags(req);
	struct pcrypt_instance_ctx *ictx;

	ictx = pcrypt_tfm_ictx(aead);

	memset(padata, 0, sizeof(struct padata_priv));

	padata->parallel = pcrypt_aead_enc;
	padata->serial = pcrypt_aead_serial;

	aead_request_set_tfm(creq, ctx->child);
	aead_request_set_callback(creq, flags & ~CRYPTO_TFM_REQ_MAY_SLEEP,
				  pcrypt_aead_done, req);
	aead_request_set_crypt(creq, req->src, req->dst,
			       req->cryptlen, req->iv);
	aead_request_set_ad(creq, req->assoclen);

	err = padata_do_parallel(ictx->psenc, padata, &ctx->cb_cpu);
	if (!err)
		return -EINPROGRESS;

	return err;
}

static void pcrypt_aead_dec(struct padata_priv *padata)
{
	struct pcrypt_request *preq = pcrypt_padata_request(padata);
	struct aead_request *req = pcrypt_request_ctx(preq);

	padata->info = crypto_aead_decrypt(req);

	if (padata->info == -EINPROGRESS)
		return;

	padata_do_serial(padata);
}

static int pcrypt_aead_decrypt(struct aead_request *req)
{
	int err;
	struct pcrypt_request *preq = aead_request_ctx(req);
	struct aead_request *creq = pcrypt_request_ctx(preq);
	struct padata_priv *padata = pcrypt_request_padata(preq);
	struct crypto_aead *aead = crypto_aead_reqtfm(req);
	struct pcrypt_aead_ctx *ctx = crypto_aead_ctx(aead);
	u32 flags = aead_request_flags(req);
	struct pcrypt_instance_ctx *ictx;

	ictx = pcrypt_tfm_ictx(aead);

	memset(padata, 0, sizeof(struct padata_priv));

	padata->parallel = pcrypt_aead_dec;
	padata->serial = pcrypt_aead_serial;

	aead_request_set_tfm(creq, ctx->child);
	aead_request_set_callback(creq, flags & ~CRYPTO_TFM_REQ_MAY_SLEEP,
				  pcrypt_aead_done, req);
	aead_request_set_crypt(creq, req->src, req->dst,
			       req->cryptlen, req->iv);
	aead_request_set_ad(creq, req->assoclen);

	err = padata_do_parallel(ictx->psdec, padata, &ctx->cb_cpu);
	if (!err)
		return -EINPROGRESS;

	return err;
}

static int pcrypt_aead_init_tfm(struct crypto_aead *tfm)
{
	int cpu, cpu_index;
	struct aead_instance *inst = aead_alg_instance(tfm);
	struct pcrypt_instance_ctx *ictx = aead_instance_ctx(inst);
	struct pcrypt_aead_ctx *ctx = crypto_aead_ctx(tfm);
	struct crypto_aead *cipher;

	cpu_index = (unsigned int)atomic_inc_return(&ictx->tfm_count) %
		    cpumask_weight(cpu_online_mask);

	ctx->cb_cpu = cpumask_first(cpu_online_mask);
	for (cpu = 0; cpu < cpu_index; cpu++)
		ctx->cb_cpu = cpumask_next(ctx->cb_cpu, cpu_online_mask);

	cipher = crypto_spawn_aead(&ictx->spawn);

	if (IS_ERR(cipher))
		return PTR_ERR(cipher);

	ctx->child = cipher;
	crypto_aead_set_reqsize(tfm, sizeof(struct pcrypt_request) +
				     sizeof(struct aead_request) +
				     crypto_aead_reqsize(cipher));

	return 0;
}

static void pcrypt_aead_exit_tfm(struct crypto_aead *tfm)
{
	struct pcrypt_aead_ctx *ctx = crypto_aead_ctx(tfm);

	crypto_free_aead(ctx->child);
}

static void pcrypt_free(struct aead_instance *inst)
{
	struct pcrypt_instance_ctx *ctx = aead_instance_ctx(inst);

	crypto_drop_aead(&ctx->spawn);
	padata_free_shell(ctx->psdec);
	padata_free_shell(ctx->psenc);
	kfree(inst);
}

static int pcrypt_init_instance(struct crypto_instance *inst,
				struct crypto_alg *alg)
{
	if (snprintf(inst->alg.cra_driver_name, CRYPTO_MAX_ALG_NAME,
		     "pcrypt(%s)", alg->cra_driver_name) >= CRYPTO_MAX_ALG_NAME)
		return -ENAMETOOLONG;

	memcpy(inst->alg.cra_name, alg->cra_name, CRYPTO_MAX_ALG_NAME);

	inst->alg.cra_priority = alg->cra_priority + 100;
	inst->alg.cra_blocksize = alg->cra_blocksize;
	inst->alg.cra_alignmask = alg->cra_alignmask;

	return 0;
}

static int pcrypt_create_aead(struct crypto_template *tmpl, struct rtattr **tb,
			      struct crypto_attr_type *algt)
{
	struct pcrypt_instance_ctx *ctx;
	struct aead_instance *inst;
	struct aead_alg *alg;
	u32 mask = crypto_algt_inherited_mask(algt);
	int err;

	inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL);
	if (!inst)
		return -ENOMEM;

	err = -ENOMEM;

	ctx = aead_instance_ctx(inst);
	ctx->psenc = padata_alloc_shell(pencrypt);
	if (!ctx->psenc)
		goto err_free_inst;

	ctx->psdec = padata_alloc_shell(pdecrypt);
	if (!ctx->psdec)
		goto err_free_inst;

	err = crypto_grab_aead(&ctx->spawn, aead_crypto_instance(inst),
			       crypto_attr_alg_name(tb[1]), 0, mask);
	if (err)
		goto err_free_inst;

	alg = crypto_spawn_aead_alg(&ctx->spawn);
	err = pcrypt_init_instance(aead_crypto_instance(inst), &alg->base);
	if (err)
		goto err_free_inst;

	inst->alg.base.cra_flags |= CRYPTO_ALG_ASYNC;

	inst->alg.ivsize = crypto_aead_alg_ivsize(alg);
	inst->alg.maxauthsize = crypto_aead_alg_maxauthsize(alg);

	inst->alg.base.cra_ctxsize = sizeof(struct pcrypt_aead_ctx);

	inst->alg.init = pcrypt_aead_init_tfm;
	inst->alg.exit = pcrypt_aead_exit_tfm;

	inst->alg.setkey = pcrypt_aead_setkey;
	inst->alg.setauthsize = pcrypt_aead_setauthsize;
	inst->alg.encrypt = pcrypt_aead_encrypt;
	inst->alg.decrypt = pcrypt_aead_decrypt;

	inst->free = pcrypt_free;

	err = aead_register_instance(tmpl, inst);
	if (err) {
err_free_inst:
		pcrypt_free(inst);
	}
	return err;
}

static int pcrypt_create(struct crypto_template *tmpl, struct rtattr **tb)
{
	struct crypto_attr_type *algt;

	algt = crypto_get_attr_type(tb);
	if (IS_ERR(algt))
		return PTR_ERR(algt);

	switch (algt->type & algt->mask & CRYPTO_ALG_TYPE_MASK) {
	case CRYPTO_ALG_TYPE_AEAD:
		return pcrypt_create_aead(tmpl, tb, algt);
	}

	return -EINVAL;
}

static int pcrypt_sysfs_add(struct padata_instance *pinst, const char *name)
{
	int ret;

	pinst->kobj.kset = pcrypt_kset;
	ret = kobject_add(&pinst->kobj, NULL, "%s", name);
	if (!ret)
		kobject_uevent(&pinst->kobj, KOBJ_ADD);

	return ret;
}

static int pcrypt_init_padata(struct padata_instance **pinst, const char *name)
{
	int ret = -ENOMEM;

	*pinst = padata_alloc(name);
	if (!*pinst)
		return ret;

	ret = pcrypt_sysfs_add(*pinst, name);
	if (ret)
		padata_free(*pinst);

	return ret;
}

static struct crypto_template pcrypt_tmpl = {
	.name = "pcrypt",
	.create = pcrypt_create,
	.module = THIS_MODULE,
};

static int __init pcrypt_init(void)
{
	int err = -ENOMEM;

	pcrypt_kset = kset_create_and_add("pcrypt", NULL, kernel_kobj);
	if (!pcrypt_kset)
		goto err;

	err = pcrypt_init_padata(&pencrypt, "pencrypt");
	if (err)
		goto err_unreg_kset;

	err = pcrypt_init_padata(&pdecrypt, "pdecrypt");
	if (err)
		goto err_deinit_pencrypt;

	return crypto_register_template(&pcrypt_tmpl);

err_deinit_pencrypt:
	padata_free(pencrypt);
err_unreg_kset:
	kset_unregister(pcrypt_kset);
err:
	return err;
}

static void __exit pcrypt_exit(void)
{
	crypto_unregister_template(&pcrypt_tmpl);

	padata_free(pencrypt);
	padata_free(pdecrypt);

	kset_unregister(pcrypt_kset);
}

subsys_initcall(pcrypt_init);
module_exit(pcrypt_exit);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Steffen Klassert <steffen.klassert@secunet.com>");
MODULE_DESCRIPTION("Parallel crypto wrapper");
MODULE_ALIAS_CRYPTO("pcrypt");
Commit	Line	Data
a61127c2	1	// SPDX-License-Identifier: GPL-2.0-only
5068c7a8 SK	2	/*
	3	* pcrypt - Parallel crypto wrapper.
	4	*
	5	* Copyright (C) 2009 secunet Security Networks AG
	6	* Copyright (C) 2009 Steffen Klassert <steffen.klassert@secunet.com>
5068c7a8 SK	7	*/
	8
	9	#include <crypto/algapi.h>
	10	#include <crypto/internal/aead.h>
a5a22e57	11	#include <linux/atomic.h>
5068c7a8 SK	12	#include <linux/err.h>
	13	#include <linux/init.h>
	14	#include <linux/module.h>
	15	#include <linux/slab.h>
a3fb1e33	16	#include <linux/kobject.h>
d3f64e46	17	#include <linux/cpu.h>
5068c7a8 SK	18	#include <crypto/pcrypt.h>
5068c7a8 SK	19
63d35788 DJ	20	static struct padata_instance *pencrypt;
63d35788 DJ	21	static struct padata_instance *pdecrypt;
a3fb1e33	22	static struct kset *pcrypt_kset;
5068c7a8 SK	23
5068c7a8 SK	24	struct pcrypt_instance_ctx {
66d948e7	25	struct crypto_aead_spawn spawn;
bbefa1dd HX	26	struct padata_shell *psenc;
bbefa1dd HX	27	struct padata_shell *psdec;
a5a22e57	28	atomic_t tfm_count;
5068c7a8 SK	29	};
	30
	31	struct pcrypt_aead_ctx {
	32	struct crypto_aead *child;
	33	unsigned int cb_cpu;
	34	};
	35
bbefa1dd HX	36	static inline struct pcrypt_instance_ctx *pcrypt_tfm_ictx(
	37	struct crypto_aead *tfm)
	38	{
	39	return aead_instance_ctx(aead_alg_instance(tfm));
	40	}
	41
5068c7a8 SK	42	static int pcrypt_aead_setkey(struct crypto_aead *parent,
	43	const u8 *key, unsigned int keylen)
	44	{
	45	struct pcrypt_aead_ctx *ctx = crypto_aead_ctx(parent);
	46
	47	return crypto_aead_setkey(ctx->child, key, keylen);
	48	}
	49
	50	static int pcrypt_aead_setauthsize(struct crypto_aead *parent,
	51	unsigned int authsize)
	52	{
	53	struct pcrypt_aead_ctx *ctx = crypto_aead_ctx(parent);
	54
	55	return crypto_aead_setauthsize(ctx->child, authsize);
	56	}
	57
	58	static void pcrypt_aead_serial(struct padata_priv *padata)
	59	{
	60	struct pcrypt_request *preq = pcrypt_padata_request(padata);
	61	struct aead_request *req = pcrypt_request_ctx(preq);
	62
	63	aead_request_complete(req->base.data, padata->info);
	64	}
	65
5068c7a8 SK	66	static void pcrypt_aead_done(struct crypto_async_request *areq, int err)
	67	{
	68	struct aead_request *req = areq->data;
	69	struct pcrypt_request *preq = aead_request_ctx(req);
	70	struct padata_priv *padata = pcrypt_request_padata(preq);
	71
	72	padata->info = err;
5068c7a8 SK	73
	74	padata_do_serial(padata);
	75	}
	76
	77	static void pcrypt_aead_enc(struct padata_priv *padata)
	78	{
	79	struct pcrypt_request *preq = pcrypt_padata_request(padata);
	80	struct aead_request *req = pcrypt_request_ctx(preq);
	81
	82	padata->info = crypto_aead_encrypt(req);
	83
5a1436be	84	if (padata->info == -EINPROGRESS)
5068c7a8 SK	85	return;
	86
	87	padata_do_serial(padata);
	88	}
	89
	90	static int pcrypt_aead_encrypt(struct aead_request *req)
	91	{
	92	int err;
	93	struct pcrypt_request *preq = aead_request_ctx(req);
	94	struct aead_request *creq = pcrypt_request_ctx(preq);
	95	struct padata_priv *padata = pcrypt_request_padata(preq);
	96	struct crypto_aead *aead = crypto_aead_reqtfm(req);
	97	struct pcrypt_aead_ctx *ctx = crypto_aead_ctx(aead);
	98	u32 flags = aead_request_flags(req);
bbefa1dd HX	99	struct pcrypt_instance_ctx *ictx;
	100
	101	ictx = pcrypt_tfm_ictx(aead);
5068c7a8 SK	102
	103	memset(padata, 0, sizeof(struct padata_priv));
	104
	105	padata->parallel = pcrypt_aead_enc;
	106	padata->serial = pcrypt_aead_serial;
	107
	108	aead_request_set_tfm(creq, ctx->child);
	109	aead_request_set_callback(creq, flags & ~CRYPTO_TFM_REQ_MAY_SLEEP,
	110	pcrypt_aead_done, req);
	111	aead_request_set_crypt(creq, req->src, req->dst,
	112	req->cryptlen, req->iv);
0496f560	113	aead_request_set_ad(creq, req->assoclen);
5068c7a8	114
bbefa1dd	115	err = padata_do_parallel(ictx->psenc, padata, &ctx->cb_cpu);
83f619f3 SK	116	if (!err)
83f619f3 SK	117	return -EINPROGRESS;
5068c7a8 SK	118
	119	return err;
	120	}
	121
	122	static void pcrypt_aead_dec(struct padata_priv *padata)
	123	{
	124	struct pcrypt_request *preq = pcrypt_padata_request(padata);
	125	struct aead_request *req = pcrypt_request_ctx(preq);
	126
	127	padata->info = crypto_aead_decrypt(req);
	128
5a1436be	129	if (padata->info == -EINPROGRESS)
5068c7a8 SK	130	return;
	131
	132	padata_do_serial(padata);
	133	}
	134
	135	static int pcrypt_aead_decrypt(struct aead_request *req)
	136	{
	137	int err;
	138	struct pcrypt_request *preq = aead_request_ctx(req);
	139	struct aead_request *creq = pcrypt_request_ctx(preq);
	140	struct padata_priv *padata = pcrypt_request_padata(preq);
	141	struct crypto_aead *aead = crypto_aead_reqtfm(req);
	142	struct pcrypt_aead_ctx *ctx = crypto_aead_ctx(aead);
	143	u32 flags = aead_request_flags(req);
bbefa1dd HX	144	struct pcrypt_instance_ctx *ictx;
	145
	146	ictx = pcrypt_tfm_ictx(aead);
5068c7a8 SK	147
	148	memset(padata, 0, sizeof(struct padata_priv));
	149
	150	padata->parallel = pcrypt_aead_dec;
	151	padata->serial = pcrypt_aead_serial;
	152
	153	aead_request_set_tfm(creq, ctx->child);
	154	aead_request_set_callback(creq, flags & ~CRYPTO_TFM_REQ_MAY_SLEEP,
	155	pcrypt_aead_done, req);
	156	aead_request_set_crypt(creq, req->src, req->dst,
	157	req->cryptlen, req->iv);
0496f560	158	aead_request_set_ad(creq, req->assoclen);
5068c7a8	159
bbefa1dd	160	err = padata_do_parallel(ictx->psdec, padata, &ctx->cb_cpu);
83f619f3 SK	161	if (!err)
83f619f3 SK	162	return -EINPROGRESS;
5068c7a8 SK	163
	164	return err;
	165	}
	166
0496f560	167	static int pcrypt_aead_init_tfm(struct crypto_aead *tfm)
5068c7a8 SK	168	{
5068c7a8 SK	169	int cpu, cpu_index;
0496f560 HX	170	struct aead_instance *inst = aead_alg_instance(tfm);
	171	struct pcrypt_instance_ctx *ictx = aead_instance_ctx(inst);
	172	struct pcrypt_aead_ctx *ctx = crypto_aead_ctx(tfm);
5068c7a8 SK	173	struct crypto_aead *cipher;
5068c7a8 SK	174
a5a22e57 HX	175	cpu_index = (unsigned int)atomic_inc_return(&ictx->tfm_count) %
a5a22e57 HX	176	cpumask_weight(cpu_online_mask);
5068c7a8	177
fbf0ca1b	178	ctx->cb_cpu = cpumask_first(cpu_online_mask);
5068c7a8	179	for (cpu = 0; cpu < cpu_index; cpu++)
fbf0ca1b	180	ctx->cb_cpu = cpumask_next(ctx->cb_cpu, cpu_online_mask);
5068c7a8	181
0496f560	182	cipher = crypto_spawn_aead(&ictx->spawn);
5068c7a8 SK	183
	184	if (IS_ERR(cipher))
	185	return PTR_ERR(cipher);
	186
	187	ctx->child = cipher;
0496f560 HX	188	crypto_aead_set_reqsize(tfm, sizeof(struct pcrypt_request) +
	189	sizeof(struct aead_request) +
	190	crypto_aead_reqsize(cipher));
5068c7a8 SK	191
	192	return 0;
	193	}
	194
0496f560	195	static void pcrypt_aead_exit_tfm(struct crypto_aead *tfm)
5068c7a8	196	{
0496f560	197	struct pcrypt_aead_ctx *ctx = crypto_aead_ctx(tfm);
5068c7a8 SK	198
	199	crypto_free_aead(ctx->child);
	200	}
	201
d76c6810 EB	202	static void pcrypt_free(struct aead_instance *inst)
	203	{
	204	struct pcrypt_instance_ctx *ctx = aead_instance_ctx(inst);
	205
	206	crypto_drop_aead(&ctx->spawn);
bbefa1dd HX	207	padata_free_shell(ctx->psdec);
bbefa1dd HX	208	padata_free_shell(ctx->psenc);
d76c6810 EB	209	kfree(inst);
	210	}
	211
66d948e7 HX	212	static int pcrypt_init_instance(struct crypto_instance *inst,
66d948e7 HX	213	struct crypto_alg *alg)
5068c7a8	214	{
5068c7a8 SK	215	if (snprintf(inst->alg.cra_driver_name, CRYPTO_MAX_ALG_NAME,
5068c7a8 SK	216	"pcrypt(%s)", alg->cra_driver_name) >= CRYPTO_MAX_ALG_NAME)
66d948e7	217	return -ENAMETOOLONG;
5068c7a8 SK	218
	219	memcpy(inst->alg.cra_name, alg->cra_name, CRYPTO_MAX_ALG_NAME);
	220
5068c7a8 SK	221	inst->alg.cra_priority = alg->cra_priority + 100;
	222	inst->alg.cra_blocksize = alg->cra_blocksize;
	223	inst->alg.cra_alignmask = alg->cra_alignmask;
	224
66d948e7	225	return 0;
5068c7a8 SK	226	}
5068c7a8 SK	227
0496f560	228	static int pcrypt_create_aead(struct crypto_template tmpl, struct rtattr *tb,
7bcb2c99	229	struct crypto_attr_type *algt)
5068c7a8	230	{
66d948e7	231	struct pcrypt_instance_ctx *ctx;
0496f560 HX	232	struct aead_instance *inst;
0496f560 HX	233	struct aead_alg *alg;
7bcb2c99	234	u32 mask = crypto_algt_inherited_mask(algt);
66d948e7 HX	235	int err;
66d948e7 HX	236
66d948e7 HX	237	inst = kzalloc(sizeof(inst) + sizeof(ctx), GFP_KERNEL);
66d948e7 HX	238	if (!inst)
0496f560	239	return -ENOMEM;
66d948e7	240
bbefa1dd HX	241	err = -ENOMEM;
bbefa1dd HX	242
0496f560	243	ctx = aead_instance_ctx(inst);
bbefa1dd HX	244	ctx->psenc = padata_alloc_shell(pencrypt);
bbefa1dd HX	245	if (!ctx->psenc)
07b24c7c	246	goto err_free_inst;
bbefa1dd HX	247
	248	ctx->psdec = padata_alloc_shell(pdecrypt);
	249	if (!ctx->psdec)
07b24c7c	250	goto err_free_inst;
bbefa1dd	251
cd900f0c	252	err = crypto_grab_aead(&ctx->spawn, aead_crypto_instance(inst),
7bcb2c99	253	crypto_attr_alg_name(tb[1]), 0, mask);
66d948e7	254	if (err)
07b24c7c	255	goto err_free_inst;
5068c7a8	256
0496f560 HX	257	alg = crypto_spawn_aead_alg(&ctx->spawn);
0496f560 HX	258	err = pcrypt_init_instance(aead_crypto_instance(inst), &alg->base);
66d948e7	259	if (err)
07b24c7c	260	goto err_free_inst;
5068c7a8	261
7bcb2c99	262	inst->alg.base.cra_flags \|= CRYPTO_ALG_ASYNC;
846f97df	263
0496f560 HX	264	inst->alg.ivsize = crypto_aead_alg_ivsize(alg);
0496f560 HX	265	inst->alg.maxauthsize = crypto_aead_alg_maxauthsize(alg);
5068c7a8	266
0496f560	267	inst->alg.base.cra_ctxsize = sizeof(struct pcrypt_aead_ctx);
5068c7a8	268
0496f560 HX	269	inst->alg.init = pcrypt_aead_init_tfm;
0496f560 HX	270	inst->alg.exit = pcrypt_aead_exit_tfm;
5068c7a8	271
0496f560 HX	272	inst->alg.setkey = pcrypt_aead_setkey;
	273	inst->alg.setauthsize = pcrypt_aead_setauthsize;
	274	inst->alg.encrypt = pcrypt_aead_encrypt;
	275	inst->alg.decrypt = pcrypt_aead_decrypt;
5068c7a8	276
d76c6810 EB	277	inst->free = pcrypt_free;
d76c6810 EB	278
0496f560	279	err = aead_register_instance(tmpl, inst);
07b24c7c EB	280	if (err) {
	281	err_free_inst:
	282	pcrypt_free(inst);
	283	}
0496f560	284	return err;
5068c7a8 SK	285	}
5068c7a8 SK	286
0496f560	287	static int pcrypt_create(struct crypto_template tmpl, struct rtattr *tb)
5068c7a8 SK	288	{
	289	struct crypto_attr_type *algt;
	290
	291	algt = crypto_get_attr_type(tb);
	292	if (IS_ERR(algt))
0496f560	293	return PTR_ERR(algt);
5068c7a8 SK	294
	295	switch (algt->type & algt->mask & CRYPTO_ALG_TYPE_MASK) {
	296	case CRYPTO_ALG_TYPE_AEAD:
7bcb2c99	297	return pcrypt_create_aead(tmpl, tb, algt);
5068c7a8 SK	298	}
5068c7a8 SK	299
0496f560	300	return -EINVAL;
5068c7a8 SK	301	}
5068c7a8 SK	302
a3fb1e33 DK	303	static int pcrypt_sysfs_add(struct padata_instance pinst, const char name)
	304	{
	305	int ret;
	306
	307	pinst->kobj.kset = pcrypt_kset;
b1e3874c	308	ret = kobject_add(&pinst->kobj, NULL, "%s", name);
a3fb1e33 DK	309	if (!ret)
	310	kobject_uevent(&pinst->kobj, KOBJ_ADD);
	311
	312	return ret;
	313	}
	314
63d35788	315	static int pcrypt_init_padata(struct padata_instance *pinst, const char name)
e15bacbe DK	316	{
e15bacbe DK	317	int ret = -ENOMEM;
e15bacbe	318
3f257191	319	*pinst = padata_alloc(name);
63d35788 DJ	320	if (!*pinst)
63d35788 DJ	321	return ret;
e15bacbe	322
63d35788	323	ret = pcrypt_sysfs_add(*pinst, name);
a3fb1e33	324	if (ret)
63d35788	325	padata_free(*pinst);
a3fb1e33	326
e15bacbe DK	327	return ret;
	328	}
	329
5068c7a8 SK	330	static struct crypto_template pcrypt_tmpl = {
5068c7a8 SK	331	.name = "pcrypt",
0496f560	332	.create = pcrypt_create,
5068c7a8 SK	333	.module = THIS_MODULE,
	334	};
	335
	336	static int __init pcrypt_init(void)
	337	{
a3fb1e33 DK	338	int err = -ENOMEM;
	339
	340	pcrypt_kset = kset_create_and_add("pcrypt", NULL, kernel_kobj);
	341	if (!pcrypt_kset)
	342	goto err;
5068c7a8	343
c57e842e	344	err = pcrypt_init_padata(&pencrypt, "pencrypt");
4c879170	345	if (err)
a3fb1e33	346	goto err_unreg_kset;
4c879170	347
c57e842e	348	err = pcrypt_init_padata(&pdecrypt, "pdecrypt");
4c879170	349	if (err)
e15bacbe	350	goto err_deinit_pencrypt;
4c879170	351
e15bacbe	352	return crypto_register_template(&pcrypt_tmpl);
5068c7a8	353
e15bacbe	354	err_deinit_pencrypt:
350ef051	355	padata_free(pencrypt);
a3fb1e33 DK	356	err_unreg_kset:
a3fb1e33 DK	357	kset_unregister(pcrypt_kset);
5068c7a8	358	err:
4c879170	359	return err;
5068c7a8 SK	360	}
	361
	362	static void __exit pcrypt_exit(void)
	363	{
07bfd9bd HX	364	crypto_unregister_template(&pcrypt_tmpl);
07bfd9bd HX	365
350ef051 DJ	366	padata_free(pencrypt);
350ef051 DJ	367	padata_free(pdecrypt);
5068c7a8	368
a3fb1e33	369	kset_unregister(pcrypt_kset);
5068c7a8 SK	370	}
5068c7a8 SK	371
c4741b23	372	subsys_initcall(pcrypt_init);
5068c7a8 SK	373	module_exit(pcrypt_exit);
	374
	375	MODULE_LICENSE("GPL");
	376	MODULE_AUTHOR("Steffen Klassert <steffen.klassert@secunet.com>");
	377	MODULE_DESCRIPTION("Parallel crypto wrapper");
4943ba16	378	MODULE_ALIAS_CRYPTO("pcrypt");