[mirror_ubuntu-focal-kernel.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/notifier.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;
	atomic_t tfm_count;
};

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

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;
	req->base.flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;

	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);

	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(pencrypt, 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);

	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(pdecrypt, 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);
	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,
			      u32 type, u32 mask)
{
	struct pcrypt_instance_ctx *ctx;
	struct crypto_attr_type *algt;
	struct aead_instance *inst;
	struct aead_alg *alg;
	const char *name;
	int err;

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

	name = crypto_attr_alg_name(tb[1]);
	if (IS_ERR(name))
		return PTR_ERR(name);

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

	ctx = aead_instance_ctx(inst);
	crypto_set_aead_spawn(&ctx->spawn, aead_crypto_instance(inst));

	err = crypto_grab_aead(&ctx->spawn, name, 0, 0);
	if (err)
		goto out_free_inst;

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

	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)
		goto out_drop_aead;

out:
	return err;

out_drop_aead:
	crypto_drop_aead(&ctx->spawn);
out_free_inst:
	kfree(inst);
	goto out;
}

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->type, algt->mask);
	}

	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_possible(name);
	if (!*pinst)
		return ret;

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

	return ret;
}

static void pcrypt_fini_padata(struct padata_instance *pinst)
{
	padata_stop(pinst);
	padata_free(pinst);
}

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;

	padata_start(pencrypt);
	padata_start(pdecrypt);

	return crypto_register_template(&pcrypt_tmpl);

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

static void __exit pcrypt_exit(void)
{
	pcrypt_fini_padata(pencrypt);
	pcrypt_fini_padata(pdecrypt);

	kset_unregister(pcrypt_kset);
	crypto_unregister_template(&pcrypt_tmpl);
}

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>
e15bacbe	16	#include <linux/notifier.h>
a3fb1e33	17	#include <linux/kobject.h>
d3f64e46	18	#include <linux/cpu.h>
5068c7a8 SK	19	#include <crypto/pcrypt.h>
5068c7a8 SK	20
63d35788 DJ	21	static struct padata_instance *pencrypt;
63d35788 DJ	22	static struct padata_instance *pdecrypt;
a3fb1e33	23	static struct kset *pcrypt_kset;
5068c7a8 SK	24
5068c7a8 SK	25	struct pcrypt_instance_ctx {
66d948e7	26	struct crypto_aead_spawn spawn;
a5a22e57	27	atomic_t tfm_count;
5068c7a8 SK	28	};
	29
	30	struct pcrypt_aead_ctx {
	31	struct crypto_aead *child;
	32	unsigned int cb_cpu;
	33	};
	34
5068c7a8 SK	35	static int pcrypt_aead_setkey(struct crypto_aead *parent,
	36	const u8 *key, unsigned int keylen)
	37	{
	38	struct pcrypt_aead_ctx *ctx = crypto_aead_ctx(parent);
	39
	40	return crypto_aead_setkey(ctx->child, key, keylen);
	41	}
	42
	43	static int pcrypt_aead_setauthsize(struct crypto_aead *parent,
	44	unsigned int authsize)
	45	{
	46	struct pcrypt_aead_ctx *ctx = crypto_aead_ctx(parent);
	47
	48	return crypto_aead_setauthsize(ctx->child, authsize);
	49	}
	50
	51	static void pcrypt_aead_serial(struct padata_priv *padata)
	52	{
	53	struct pcrypt_request *preq = pcrypt_padata_request(padata);
	54	struct aead_request *req = pcrypt_request_ctx(preq);
	55
	56	aead_request_complete(req->base.data, padata->info);
	57	}
	58
5068c7a8 SK	59	static void pcrypt_aead_done(struct crypto_async_request *areq, int err)
	60	{
	61	struct aead_request *req = areq->data;
	62	struct pcrypt_request *preq = aead_request_ctx(req);
	63	struct padata_priv *padata = pcrypt_request_padata(preq);
	64
	65	padata->info = err;
	66	req->base.flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
	67
	68	padata_do_serial(padata);
	69	}
	70
	71	static void pcrypt_aead_enc(struct padata_priv *padata)
	72	{
	73	struct pcrypt_request *preq = pcrypt_padata_request(padata);
	74	struct aead_request *req = pcrypt_request_ctx(preq);
	75
	76	padata->info = crypto_aead_encrypt(req);
	77
5a1436be	78	if (padata->info == -EINPROGRESS)
5068c7a8 SK	79	return;
	80
	81	padata_do_serial(padata);
	82	}
	83
	84	static int pcrypt_aead_encrypt(struct aead_request *req)
	85	{
	86	int err;
	87	struct pcrypt_request *preq = aead_request_ctx(req);
	88	struct aead_request *creq = pcrypt_request_ctx(preq);
	89	struct padata_priv *padata = pcrypt_request_padata(preq);
	90	struct crypto_aead *aead = crypto_aead_reqtfm(req);
	91	struct pcrypt_aead_ctx *ctx = crypto_aead_ctx(aead);
	92	u32 flags = aead_request_flags(req);
	93
	94	memset(padata, 0, sizeof(struct padata_priv));
	95
	96	padata->parallel = pcrypt_aead_enc;
	97	padata->serial = pcrypt_aead_serial;
	98
	99	aead_request_set_tfm(creq, ctx->child);
	100	aead_request_set_callback(creq, flags & ~CRYPTO_TFM_REQ_MAY_SLEEP,
	101	pcrypt_aead_done, req);
	102	aead_request_set_crypt(creq, req->src, req->dst,
	103	req->cryptlen, req->iv);
0496f560	104	aead_request_set_ad(creq, req->assoclen);
5068c7a8	105
63d35788	106	err = padata_do_parallel(pencrypt, padata, &ctx->cb_cpu);
83f619f3 SK	107	if (!err)
83f619f3 SK	108	return -EINPROGRESS;
5068c7a8 SK	109
	110	return err;
	111	}
	112
	113	static void pcrypt_aead_dec(struct padata_priv *padata)
	114	{
	115	struct pcrypt_request *preq = pcrypt_padata_request(padata);
	116	struct aead_request *req = pcrypt_request_ctx(preq);
	117
	118	padata->info = crypto_aead_decrypt(req);
	119
5a1436be	120	if (padata->info == -EINPROGRESS)
5068c7a8 SK	121	return;
	122
	123	padata_do_serial(padata);
	124	}
	125
	126	static int pcrypt_aead_decrypt(struct aead_request *req)
	127	{
	128	int err;
	129	struct pcrypt_request *preq = aead_request_ctx(req);
	130	struct aead_request *creq = pcrypt_request_ctx(preq);
	131	struct padata_priv *padata = pcrypt_request_padata(preq);
	132	struct crypto_aead *aead = crypto_aead_reqtfm(req);
	133	struct pcrypt_aead_ctx *ctx = crypto_aead_ctx(aead);
	134	u32 flags = aead_request_flags(req);
	135
	136	memset(padata, 0, sizeof(struct padata_priv));
	137
	138	padata->parallel = pcrypt_aead_dec;
	139	padata->serial = pcrypt_aead_serial;
	140
	141	aead_request_set_tfm(creq, ctx->child);
	142	aead_request_set_callback(creq, flags & ~CRYPTO_TFM_REQ_MAY_SLEEP,
	143	pcrypt_aead_done, req);
	144	aead_request_set_crypt(creq, req->src, req->dst,
	145	req->cryptlen, req->iv);
0496f560	146	aead_request_set_ad(creq, req->assoclen);
5068c7a8	147
63d35788	148	err = padata_do_parallel(pdecrypt, padata, &ctx->cb_cpu);
83f619f3 SK	149	if (!err)
83f619f3 SK	150	return -EINPROGRESS;
5068c7a8 SK	151
	152	return err;
	153	}
	154
0496f560	155	static int pcrypt_aead_init_tfm(struct crypto_aead *tfm)
5068c7a8 SK	156	{
5068c7a8 SK	157	int cpu, cpu_index;
0496f560 HX	158	struct aead_instance *inst = aead_alg_instance(tfm);
	159	struct pcrypt_instance_ctx *ictx = aead_instance_ctx(inst);
	160	struct pcrypt_aead_ctx *ctx = crypto_aead_ctx(tfm);
5068c7a8 SK	161	struct crypto_aead *cipher;
5068c7a8 SK	162
a5a22e57 HX	163	cpu_index = (unsigned int)atomic_inc_return(&ictx->tfm_count) %
a5a22e57 HX	164	cpumask_weight(cpu_online_mask);
5068c7a8	165
fbf0ca1b	166	ctx->cb_cpu = cpumask_first(cpu_online_mask);
5068c7a8	167	for (cpu = 0; cpu < cpu_index; cpu++)
fbf0ca1b	168	ctx->cb_cpu = cpumask_next(ctx->cb_cpu, cpu_online_mask);
5068c7a8	169
0496f560	170	cipher = crypto_spawn_aead(&ictx->spawn);
5068c7a8 SK	171
	172	if (IS_ERR(cipher))
	173	return PTR_ERR(cipher);
	174
	175	ctx->child = cipher;
0496f560 HX	176	crypto_aead_set_reqsize(tfm, sizeof(struct pcrypt_request) +
	177	sizeof(struct aead_request) +
	178	crypto_aead_reqsize(cipher));
5068c7a8 SK	179
	180	return 0;
	181	}
	182
0496f560	183	static void pcrypt_aead_exit_tfm(struct crypto_aead *tfm)
5068c7a8	184	{
0496f560	185	struct pcrypt_aead_ctx *ctx = crypto_aead_ctx(tfm);
5068c7a8 SK	186
	187	crypto_free_aead(ctx->child);
	188	}
	189
d76c6810 EB	190	static void pcrypt_free(struct aead_instance *inst)
	191	{
	192	struct pcrypt_instance_ctx *ctx = aead_instance_ctx(inst);
	193
	194	crypto_drop_aead(&ctx->spawn);
	195	kfree(inst);
	196	}
	197
66d948e7 HX	198	static int pcrypt_init_instance(struct crypto_instance *inst,
66d948e7 HX	199	struct crypto_alg *alg)
5068c7a8	200	{
5068c7a8 SK	201	if (snprintf(inst->alg.cra_driver_name, CRYPTO_MAX_ALG_NAME,
5068c7a8 SK	202	"pcrypt(%s)", alg->cra_driver_name) >= CRYPTO_MAX_ALG_NAME)
66d948e7	203	return -ENAMETOOLONG;
5068c7a8 SK	204
	205	memcpy(inst->alg.cra_name, alg->cra_name, CRYPTO_MAX_ALG_NAME);
	206
5068c7a8 SK	207	inst->alg.cra_priority = alg->cra_priority + 100;
	208	inst->alg.cra_blocksize = alg->cra_blocksize;
	209	inst->alg.cra_alignmask = alg->cra_alignmask;
	210
66d948e7	211	return 0;
5068c7a8 SK	212	}
5068c7a8 SK	213
0496f560 HX	214	static int pcrypt_create_aead(struct crypto_template tmpl, struct rtattr *tb,
0496f560 HX	215	u32 type, u32 mask)
5068c7a8	216	{
66d948e7	217	struct pcrypt_instance_ctx *ctx;
846f97df	218	struct crypto_attr_type *algt;
0496f560 HX	219	struct aead_instance *inst;
0496f560 HX	220	struct aead_alg *alg;
66d948e7 HX	221	const char *name;
	222	int err;
	223
846f97df HX	224	algt = crypto_get_attr_type(tb);
	225	if (IS_ERR(algt))
	226	return PTR_ERR(algt);
	227
66d948e7 HX	228	name = crypto_attr_alg_name(tb[1]);
66d948e7 HX	229	if (IS_ERR(name))
0496f560	230	return PTR_ERR(name);
66d948e7 HX	231
	232	inst = kzalloc(sizeof(inst) + sizeof(ctx), GFP_KERNEL);
	233	if (!inst)
0496f560	234	return -ENOMEM;
66d948e7	235
0496f560 HX	236	ctx = aead_instance_ctx(inst);
0496f560 HX	237	crypto_set_aead_spawn(&ctx->spawn, aead_crypto_instance(inst));
5068c7a8	238
5e4b8c1f	239	err = crypto_grab_aead(&ctx->spawn, name, 0, 0);
66d948e7 HX	240	if (err)
66d948e7 HX	241	goto out_free_inst;
5068c7a8	242
0496f560 HX	243	alg = crypto_spawn_aead_alg(&ctx->spawn);
0496f560 HX	244	err = pcrypt_init_instance(aead_crypto_instance(inst), &alg->base);
66d948e7 HX	245	if (err)
66d948e7 HX	246	goto out_drop_aead;
5068c7a8	247
846f97df	248	inst->alg.base.cra_flags = CRYPTO_ALG_ASYNC;
846f97df	249
0496f560 HX	250	inst->alg.ivsize = crypto_aead_alg_ivsize(alg);
0496f560 HX	251	inst->alg.maxauthsize = crypto_aead_alg_maxauthsize(alg);
5068c7a8	252
0496f560	253	inst->alg.base.cra_ctxsize = sizeof(struct pcrypt_aead_ctx);
5068c7a8	254
0496f560 HX	255	inst->alg.init = pcrypt_aead_init_tfm;
0496f560 HX	256	inst->alg.exit = pcrypt_aead_exit_tfm;
5068c7a8	257
0496f560 HX	258	inst->alg.setkey = pcrypt_aead_setkey;
	259	inst->alg.setauthsize = pcrypt_aead_setauthsize;
	260	inst->alg.encrypt = pcrypt_aead_encrypt;
	261	inst->alg.decrypt = pcrypt_aead_decrypt;
5068c7a8	262
d76c6810 EB	263	inst->free = pcrypt_free;
d76c6810 EB	264
0496f560 HX	265	err = aead_register_instance(tmpl, inst);
	266	if (err)
	267	goto out_drop_aead;
5068c7a8	268
66d948e7	269	out:
0496f560	270	return err;
66d948e7 HX	271
	272	out_drop_aead:
	273	crypto_drop_aead(&ctx->spawn);
	274	out_free_inst:
	275	kfree(inst);
66d948e7	276	goto out;
5068c7a8 SK	277	}
5068c7a8 SK	278
0496f560	279	static int pcrypt_create(struct crypto_template tmpl, struct rtattr *tb)
5068c7a8 SK	280	{
	281	struct crypto_attr_type *algt;
	282
	283	algt = crypto_get_attr_type(tb);
	284	if (IS_ERR(algt))
0496f560	285	return PTR_ERR(algt);
5068c7a8 SK	286
	287	switch (algt->type & algt->mask & CRYPTO_ALG_TYPE_MASK) {
	288	case CRYPTO_ALG_TYPE_AEAD:
0496f560	289	return pcrypt_create_aead(tmpl, tb, algt->type, algt->mask);
5068c7a8 SK	290	}
5068c7a8 SK	291
0496f560	292	return -EINVAL;
5068c7a8 SK	293	}
5068c7a8 SK	294
a3fb1e33 DK	295	static int pcrypt_sysfs_add(struct padata_instance pinst, const char name)
	296	{
	297	int ret;
	298
	299	pinst->kobj.kset = pcrypt_kset;
b1e3874c	300	ret = kobject_add(&pinst->kobj, NULL, "%s", name);
a3fb1e33 DK	301	if (!ret)
	302	kobject_uevent(&pinst->kobj, KOBJ_ADD);
	303
	304	return ret;
	305	}
	306
63d35788	307	static int pcrypt_init_padata(struct padata_instance *pinst, const char name)
e15bacbe DK	308	{
e15bacbe DK	309	int ret = -ENOMEM;
e15bacbe	310
63d35788 DJ	311	*pinst = padata_alloc_possible(name);
	312	if (!*pinst)
	313	return ret;
e15bacbe	314
63d35788	315	ret = pcrypt_sysfs_add(*pinst, name);
a3fb1e33	316	if (ret)
63d35788	317	padata_free(*pinst);
a3fb1e33	318
e15bacbe DK	319	return ret;
	320	}
	321
63d35788	322	static void pcrypt_fini_padata(struct padata_instance *pinst)
e15bacbe	323	{
63d35788 DJ	324	padata_stop(pinst);
63d35788 DJ	325	padata_free(pinst);
e15bacbe DK	326	}
e15bacbe DK	327
5068c7a8 SK	328	static struct crypto_template pcrypt_tmpl = {
5068c7a8 SK	329	.name = "pcrypt",
0496f560	330	.create = pcrypt_create,
5068c7a8 SK	331	.module = THIS_MODULE,
	332	};
	333
	334	static int __init pcrypt_init(void)
	335	{
a3fb1e33 DK	336	int err = -ENOMEM;
	337
	338	pcrypt_kset = kset_create_and_add("pcrypt", NULL, kernel_kobj);
	339	if (!pcrypt_kset)
	340	goto err;
5068c7a8	341
c57e842e	342	err = pcrypt_init_padata(&pencrypt, "pencrypt");
4c879170	343	if (err)
a3fb1e33	344	goto err_unreg_kset;
4c879170	345
c57e842e	346	err = pcrypt_init_padata(&pdecrypt, "pdecrypt");
4c879170	347	if (err)
e15bacbe	348	goto err_deinit_pencrypt;
4c879170	349
63d35788 DJ	350	padata_start(pencrypt);
63d35788 DJ	351	padata_start(pdecrypt);
5068c7a8	352
e15bacbe	353	return crypto_register_template(&pcrypt_tmpl);
5068c7a8	354
e15bacbe	355	err_deinit_pencrypt:
63d35788	356	pcrypt_fini_padata(pencrypt);
a3fb1e33 DK	357	err_unreg_kset:
a3fb1e33 DK	358	kset_unregister(pcrypt_kset);
5068c7a8	359	err:
4c879170	360	return err;
5068c7a8 SK	361	}
	362
	363	static void __exit pcrypt_exit(void)
	364	{
63d35788 DJ	365	pcrypt_fini_padata(pencrypt);
63d35788 DJ	366	pcrypt_fini_padata(pdecrypt);
5068c7a8	367
a3fb1e33	368	kset_unregister(pcrypt_kset);
5068c7a8 SK	369	crypto_unregister_template(&pcrypt_tmpl);
	370	}
	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");