[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;
	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);
	int ret;

	ret = crypto_aead_encrypt(req);

	if (ret == -EINPROGRESS)
		return;

	padata->info = ret;
	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);
	int ret;

	ret = crypto_aead_decrypt(req);

	if (ret == -EINPROGRESS)
		return;

	padata->info = ret;
	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,
			      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;

	err = -ENOMEM;

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

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

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

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

	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_psdec:
	padata_free_shell(ctx->psdec);
out_free_psenc:
	padata_free_shell(ctx->psenc);
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)
{
	crypto_unregister_template(&pcrypt_tmpl);

	pcrypt_fini_padata(pencrypt);
	pcrypt_fini_padata(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>
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;
b77a06e6 HX	27	struct padata_shell *psenc;
b77a06e6 HX	28	struct padata_shell *psdec;
a5a22e57	29	atomic_t tfm_count;
5068c7a8 SK	30	};
	31
	32	struct pcrypt_aead_ctx {
	33	struct crypto_aead *child;
	34	unsigned int cb_cpu;
	35	};
	36
b77a06e6 HX	37	static inline struct pcrypt_instance_ctx *pcrypt_tfm_ictx(
	38	struct crypto_aead *tfm)
	39	{
	40	return aead_instance_ctx(aead_alg_instance(tfm));
	41	}
	42
5068c7a8 SK	43	static int pcrypt_aead_setkey(struct crypto_aead *parent,
	44	const u8 *key, unsigned int keylen)
	45	{
	46	struct pcrypt_aead_ctx *ctx = crypto_aead_ctx(parent);
	47
	48	return crypto_aead_setkey(ctx->child, key, keylen);
	49	}
	50
	51	static int pcrypt_aead_setauthsize(struct crypto_aead *parent,
	52	unsigned int authsize)
	53	{
	54	struct pcrypt_aead_ctx *ctx = crypto_aead_ctx(parent);
	55
	56	return crypto_aead_setauthsize(ctx->child, authsize);
	57	}
	58
	59	static void pcrypt_aead_serial(struct padata_priv *padata)
	60	{
	61	struct pcrypt_request *preq = pcrypt_padata_request(padata);
	62	struct aead_request *req = pcrypt_request_ctx(preq);
	63
	64	aead_request_complete(req->base.data, padata->info);
	65	}
	66
5068c7a8 SK	67	static void pcrypt_aead_done(struct crypto_async_request *areq, int err)
	68	{
	69	struct aead_request *req = areq->data;
	70	struct pcrypt_request *preq = aead_request_ctx(req);
	71	struct padata_priv *padata = pcrypt_request_padata(preq);
	72
	73	padata->info = err;
5068c7a8 SK	74
	75	padata_do_serial(padata);
	76	}
	77
	78	static void pcrypt_aead_enc(struct padata_priv *padata)
	79	{
	80	struct pcrypt_request *preq = pcrypt_padata_request(padata);
	81	struct aead_request *req = pcrypt_request_ctx(preq);
6d794df3	82	int ret;
5068c7a8	83
6d794df3	84	ret = crypto_aead_encrypt(req);
5068c7a8	85
6d794df3	86	if (ret == -EINPROGRESS)
5068c7a8 SK	87	return;
5068c7a8 SK	88
6d794df3	89	padata->info = ret;
5068c7a8 SK	90	padata_do_serial(padata);
	91	}
	92
	93	static int pcrypt_aead_encrypt(struct aead_request *req)
	94	{
	95	int err;
	96	struct pcrypt_request *preq = aead_request_ctx(req);
	97	struct aead_request *creq = pcrypt_request_ctx(preq);
	98	struct padata_priv *padata = pcrypt_request_padata(preq);
	99	struct crypto_aead *aead = crypto_aead_reqtfm(req);
	100	struct pcrypt_aead_ctx *ctx = crypto_aead_ctx(aead);
	101	u32 flags = aead_request_flags(req);
b77a06e6 HX	102	struct pcrypt_instance_ctx *ictx;
	103
	104	ictx = pcrypt_tfm_ictx(aead);
5068c7a8 SK	105
	106	memset(padata, 0, sizeof(struct padata_priv));
	107
	108	padata->parallel = pcrypt_aead_enc;
	109	padata->serial = pcrypt_aead_serial;
	110
	111	aead_request_set_tfm(creq, ctx->child);
	112	aead_request_set_callback(creq, flags & ~CRYPTO_TFM_REQ_MAY_SLEEP,
	113	pcrypt_aead_done, req);
	114	aead_request_set_crypt(creq, req->src, req->dst,
	115	req->cryptlen, req->iv);
0496f560	116	aead_request_set_ad(creq, req->assoclen);
5068c7a8	117
b77a06e6	118	err = padata_do_parallel(ictx->psenc, padata, &ctx->cb_cpu);
83f619f3 SK	119	if (!err)
83f619f3 SK	120	return -EINPROGRESS;
5068c7a8 SK	121
	122	return err;
	123	}
	124
	125	static void pcrypt_aead_dec(struct padata_priv *padata)
	126	{
	127	struct pcrypt_request *preq = pcrypt_padata_request(padata);
	128	struct aead_request *req = pcrypt_request_ctx(preq);
6d794df3	129	int ret;
5068c7a8	130
6d794df3	131	ret = crypto_aead_decrypt(req);
5068c7a8	132
6d794df3	133	if (ret == -EINPROGRESS)
5068c7a8 SK	134	return;
5068c7a8 SK	135
6d794df3	136	padata->info = ret;
5068c7a8 SK	137	padata_do_serial(padata);
	138	}
	139
	140	static int pcrypt_aead_decrypt(struct aead_request *req)
	141	{
	142	int err;
	143	struct pcrypt_request *preq = aead_request_ctx(req);
	144	struct aead_request *creq = pcrypt_request_ctx(preq);
	145	struct padata_priv *padata = pcrypt_request_padata(preq);
	146	struct crypto_aead *aead = crypto_aead_reqtfm(req);
	147	struct pcrypt_aead_ctx *ctx = crypto_aead_ctx(aead);
	148	u32 flags = aead_request_flags(req);
b77a06e6 HX	149	struct pcrypt_instance_ctx *ictx;
	150
	151	ictx = pcrypt_tfm_ictx(aead);
5068c7a8 SK	152
	153	memset(padata, 0, sizeof(struct padata_priv));
	154
	155	padata->parallel = pcrypt_aead_dec;
	156	padata->serial = pcrypt_aead_serial;
	157
	158	aead_request_set_tfm(creq, ctx->child);
	159	aead_request_set_callback(creq, flags & ~CRYPTO_TFM_REQ_MAY_SLEEP,
	160	pcrypt_aead_done, req);
	161	aead_request_set_crypt(creq, req->src, req->dst,
	162	req->cryptlen, req->iv);
0496f560	163	aead_request_set_ad(creq, req->assoclen);
5068c7a8	164
b77a06e6	165	err = padata_do_parallel(ictx->psdec, padata, &ctx->cb_cpu);
83f619f3 SK	166	if (!err)
83f619f3 SK	167	return -EINPROGRESS;
5068c7a8 SK	168
	169	return err;
	170	}
	171
0496f560	172	static int pcrypt_aead_init_tfm(struct crypto_aead *tfm)
5068c7a8 SK	173	{
5068c7a8 SK	174	int cpu, cpu_index;
0496f560 HX	175	struct aead_instance *inst = aead_alg_instance(tfm);
	176	struct pcrypt_instance_ctx *ictx = aead_instance_ctx(inst);
	177	struct pcrypt_aead_ctx *ctx = crypto_aead_ctx(tfm);
5068c7a8 SK	178	struct crypto_aead *cipher;
5068c7a8 SK	179
a5a22e57 HX	180	cpu_index = (unsigned int)atomic_inc_return(&ictx->tfm_count) %
a5a22e57 HX	181	cpumask_weight(cpu_online_mask);
5068c7a8	182
fbf0ca1b	183	ctx->cb_cpu = cpumask_first(cpu_online_mask);
5068c7a8	184	for (cpu = 0; cpu < cpu_index; cpu++)
fbf0ca1b	185	ctx->cb_cpu = cpumask_next(ctx->cb_cpu, cpu_online_mask);
5068c7a8	186
0496f560	187	cipher = crypto_spawn_aead(&ictx->spawn);
5068c7a8 SK	188
	189	if (IS_ERR(cipher))
	190	return PTR_ERR(cipher);
	191
	192	ctx->child = cipher;
0496f560 HX	193	crypto_aead_set_reqsize(tfm, sizeof(struct pcrypt_request) +
	194	sizeof(struct aead_request) +
	195	crypto_aead_reqsize(cipher));
5068c7a8 SK	196
	197	return 0;
	198	}
	199
0496f560	200	static void pcrypt_aead_exit_tfm(struct crypto_aead *tfm)
5068c7a8	201	{
0496f560	202	struct pcrypt_aead_ctx *ctx = crypto_aead_ctx(tfm);
5068c7a8 SK	203
	204	crypto_free_aead(ctx->child);
	205	}
	206
d76c6810 EB	207	static void pcrypt_free(struct aead_instance *inst)
	208	{
	209	struct pcrypt_instance_ctx *ctx = aead_instance_ctx(inst);
	210
	211	crypto_drop_aead(&ctx->spawn);
b77a06e6 HX	212	padata_free_shell(ctx->psdec);
b77a06e6 HX	213	padata_free_shell(ctx->psenc);
d76c6810 EB	214	kfree(inst);
	215	}
	216
66d948e7 HX	217	static int pcrypt_init_instance(struct crypto_instance *inst,
66d948e7 HX	218	struct crypto_alg *alg)
5068c7a8	219	{
5068c7a8 SK	220	if (snprintf(inst->alg.cra_driver_name, CRYPTO_MAX_ALG_NAME,
5068c7a8 SK	221	"pcrypt(%s)", alg->cra_driver_name) >= CRYPTO_MAX_ALG_NAME)
66d948e7	222	return -ENAMETOOLONG;
5068c7a8 SK	223
	224	memcpy(inst->alg.cra_name, alg->cra_name, CRYPTO_MAX_ALG_NAME);
	225
5068c7a8 SK	226	inst->alg.cra_priority = alg->cra_priority + 100;
	227	inst->alg.cra_blocksize = alg->cra_blocksize;
	228	inst->alg.cra_alignmask = alg->cra_alignmask;
	229
66d948e7	230	return 0;
5068c7a8 SK	231	}
5068c7a8 SK	232
0496f560 HX	233	static int pcrypt_create_aead(struct crypto_template tmpl, struct rtattr *tb,
0496f560 HX	234	u32 type, u32 mask)
5068c7a8	235	{
66d948e7	236	struct pcrypt_instance_ctx *ctx;
846f97df	237	struct crypto_attr_type *algt;
0496f560 HX	238	struct aead_instance *inst;
0496f560 HX	239	struct aead_alg *alg;
66d948e7 HX	240	const char *name;
	241	int err;
	242
846f97df HX	243	algt = crypto_get_attr_type(tb);
	244	if (IS_ERR(algt))
	245	return PTR_ERR(algt);
	246
66d948e7 HX	247	name = crypto_attr_alg_name(tb[1]);
66d948e7 HX	248	if (IS_ERR(name))
0496f560	249	return PTR_ERR(name);
66d948e7 HX	250
	251	inst = kzalloc(sizeof(inst) + sizeof(ctx), GFP_KERNEL);
	252	if (!inst)
0496f560	253	return -ENOMEM;
66d948e7	254
b77a06e6 HX	255	err = -ENOMEM;
b77a06e6 HX	256
0496f560	257	ctx = aead_instance_ctx(inst);
b77a06e6 HX	258	ctx->psenc = padata_alloc_shell(pencrypt);
	259	if (!ctx->psenc)
	260	goto out_free_inst;
	261
	262	ctx->psdec = padata_alloc_shell(pdecrypt);
	263	if (!ctx->psdec)
	264	goto out_free_psenc;
	265
0496f560	266	crypto_set_aead_spawn(&ctx->spawn, aead_crypto_instance(inst));
5068c7a8	267
5e4b8c1f	268	err = crypto_grab_aead(&ctx->spawn, name, 0, 0);
66d948e7	269	if (err)
b77a06e6	270	goto out_free_psdec;
5068c7a8	271
0496f560 HX	272	alg = crypto_spawn_aead_alg(&ctx->spawn);
0496f560 HX	273	err = pcrypt_init_instance(aead_crypto_instance(inst), &alg->base);
66d948e7 HX	274	if (err)
66d948e7 HX	275	goto out_drop_aead;
5068c7a8	276
846f97df	277	inst->alg.base.cra_flags = CRYPTO_ALG_ASYNC;
846f97df	278
0496f560 HX	279	inst->alg.ivsize = crypto_aead_alg_ivsize(alg);
0496f560 HX	280	inst->alg.maxauthsize = crypto_aead_alg_maxauthsize(alg);
5068c7a8	281
0496f560	282	inst->alg.base.cra_ctxsize = sizeof(struct pcrypt_aead_ctx);
5068c7a8	283
0496f560 HX	284	inst->alg.init = pcrypt_aead_init_tfm;
0496f560 HX	285	inst->alg.exit = pcrypt_aead_exit_tfm;
5068c7a8	286
0496f560 HX	287	inst->alg.setkey = pcrypt_aead_setkey;
	288	inst->alg.setauthsize = pcrypt_aead_setauthsize;
	289	inst->alg.encrypt = pcrypt_aead_encrypt;
	290	inst->alg.decrypt = pcrypt_aead_decrypt;
5068c7a8	291
d76c6810 EB	292	inst->free = pcrypt_free;
d76c6810 EB	293
0496f560 HX	294	err = aead_register_instance(tmpl, inst);
	295	if (err)
	296	goto out_drop_aead;
5068c7a8	297
66d948e7	298	out:
0496f560	299	return err;
66d948e7 HX	300
	301	out_drop_aead:
	302	crypto_drop_aead(&ctx->spawn);
b77a06e6 HX	303	out_free_psdec:
	304	padata_free_shell(ctx->psdec);
	305	out_free_psenc:
	306	padata_free_shell(ctx->psenc);
66d948e7 HX	307	out_free_inst:
66d948e7 HX	308	kfree(inst);
66d948e7	309	goto out;
5068c7a8 SK	310	}
5068c7a8 SK	311
0496f560	312	static int pcrypt_create(struct crypto_template tmpl, struct rtattr *tb)
5068c7a8 SK	313	{
	314	struct crypto_attr_type *algt;
	315
	316	algt = crypto_get_attr_type(tb);
	317	if (IS_ERR(algt))
0496f560	318	return PTR_ERR(algt);
5068c7a8 SK	319
	320	switch (algt->type & algt->mask & CRYPTO_ALG_TYPE_MASK) {
	321	case CRYPTO_ALG_TYPE_AEAD:
0496f560	322	return pcrypt_create_aead(tmpl, tb, algt->type, algt->mask);
5068c7a8 SK	323	}
5068c7a8 SK	324
0496f560	325	return -EINVAL;
5068c7a8 SK	326	}
5068c7a8 SK	327
a3fb1e33 DK	328	static int pcrypt_sysfs_add(struct padata_instance pinst, const char name)
	329	{
	330	int ret;
	331
	332	pinst->kobj.kset = pcrypt_kset;
b1e3874c	333	ret = kobject_add(&pinst->kobj, NULL, "%s", name);
a3fb1e33 DK	334	if (!ret)
	335	kobject_uevent(&pinst->kobj, KOBJ_ADD);
	336
	337	return ret;
	338	}
	339
63d35788	340	static int pcrypt_init_padata(struct padata_instance *pinst, const char name)
e15bacbe DK	341	{
e15bacbe DK	342	int ret = -ENOMEM;
e15bacbe	343
63d35788 DJ	344	*pinst = padata_alloc_possible(name);
	345	if (!*pinst)
	346	return ret;
e15bacbe	347
63d35788	348	ret = pcrypt_sysfs_add(*pinst, name);
a3fb1e33	349	if (ret)
63d35788	350	padata_free(*pinst);
a3fb1e33	351
e15bacbe DK	352	return ret;
	353	}
	354
63d35788	355	static void pcrypt_fini_padata(struct padata_instance *pinst)
e15bacbe	356	{
63d35788 DJ	357	padata_stop(pinst);
63d35788 DJ	358	padata_free(pinst);
e15bacbe DK	359	}
e15bacbe DK	360
5068c7a8 SK	361	static struct crypto_template pcrypt_tmpl = {
5068c7a8 SK	362	.name = "pcrypt",
0496f560	363	.create = pcrypt_create,
5068c7a8 SK	364	.module = THIS_MODULE,
	365	};
	366
	367	static int __init pcrypt_init(void)
	368	{
a3fb1e33 DK	369	int err = -ENOMEM;
	370
	371	pcrypt_kset = kset_create_and_add("pcrypt", NULL, kernel_kobj);
	372	if (!pcrypt_kset)
	373	goto err;
5068c7a8	374
c57e842e	375	err = pcrypt_init_padata(&pencrypt, "pencrypt");
4c879170	376	if (err)
a3fb1e33	377	goto err_unreg_kset;
4c879170	378
c57e842e	379	err = pcrypt_init_padata(&pdecrypt, "pdecrypt");
4c879170	380	if (err)
e15bacbe	381	goto err_deinit_pencrypt;
4c879170	382
63d35788 DJ	383	padata_start(pencrypt);
63d35788 DJ	384	padata_start(pdecrypt);
5068c7a8	385
e15bacbe	386	return crypto_register_template(&pcrypt_tmpl);
5068c7a8	387
e15bacbe	388	err_deinit_pencrypt:
63d35788	389	pcrypt_fini_padata(pencrypt);
a3fb1e33 DK	390	err_unreg_kset:
a3fb1e33 DK	391	kset_unregister(pcrypt_kset);
5068c7a8	392	err:
4c879170	393	return err;
5068c7a8 SK	394	}
	395
	396	static void __exit pcrypt_exit(void)
	397	{
c339a5c1 HX	398	crypto_unregister_template(&pcrypt_tmpl);
c339a5c1 HX	399
63d35788 DJ	400	pcrypt_fini_padata(pencrypt);
63d35788 DJ	401	pcrypt_fini_padata(pdecrypt);
5068c7a8	402
a3fb1e33	403	kset_unregister(pcrypt_kset);
5068c7a8 SK	404	}
5068c7a8 SK	405
c4741b23	406	subsys_initcall(pcrypt_init);
5068c7a8 SK	407	module_exit(pcrypt_exit);
	408
	409	MODULE_LICENSE("GPL");
	410	MODULE_AUTHOR("Steffen Klassert <steffen.klassert@secunet.com>");
	411	MODULE_DESCRIPTION("Parallel crypto wrapper");
4943ba16	412	MODULE_ALIAS_CRYPTO("pcrypt");