[linux.git] / crypto / acompress.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Asynchronous Compression operations
 *
 * Copyright (c) 2016, Intel Corporation
 * Authors: Weigang Li <[email protected]>
 *          Giovanni Cabiddu <[email protected]>
 */
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/seq_file.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/crypto.h>
#include <crypto/algapi.h>
#include <linux/cryptouser.h>
#include <linux/compiler.h>
#include <net/netlink.h>
#include <crypto/internal/acompress.h>
#include <crypto/internal/scompress.h>
#include "internal.h"

static const struct crypto_type crypto_acomp_type;

#ifdef CONFIG_NET
static int crypto_acomp_report(struct sk_buff *skb, struct crypto_alg *alg)
{
	struct crypto_report_acomp racomp;

	memset(&racomp, 0, sizeof(racomp));

	strscpy(racomp.type, "acomp", sizeof(racomp.type));

	return nla_put(skb, CRYPTOCFGA_REPORT_ACOMP, sizeof(racomp), &racomp);
}
#else
static int crypto_acomp_report(struct sk_buff *skb, struct crypto_alg *alg)
{
	return -ENOSYS;
}
#endif

static void crypto_acomp_show(struct seq_file *m, struct crypto_alg *alg)
	__maybe_unused;

static void crypto_acomp_show(struct seq_file *m, struct crypto_alg *alg)
{
	seq_puts(m, "type         : acomp\n");
}

static void crypto_acomp_exit_tfm(struct crypto_tfm *tfm)
{
	struct crypto_acomp *acomp = __crypto_acomp_tfm(tfm);
	struct acomp_alg *alg = crypto_acomp_alg(acomp);

	alg->exit(acomp);
}

static int crypto_acomp_init_tfm(struct crypto_tfm *tfm)
{
	struct crypto_acomp *acomp = __crypto_acomp_tfm(tfm);
	struct acomp_alg *alg = crypto_acomp_alg(acomp);

	if (tfm->__crt_alg->cra_type != &crypto_acomp_type)
		return crypto_init_scomp_ops_async(tfm);

	acomp->compress = alg->compress;
	acomp->decompress = alg->decompress;
	acomp->dst_free = alg->dst_free;
	acomp->reqsize = alg->reqsize;

	if (alg->exit)
		acomp->base.exit = crypto_acomp_exit_tfm;

	if (alg->init)
		return alg->init(acomp);

	return 0;
}

static unsigned int crypto_acomp_extsize(struct crypto_alg *alg)
{
	int extsize = crypto_alg_extsize(alg);

	if (alg->cra_type != &crypto_acomp_type)
		extsize += sizeof(struct crypto_scomp *);

	return extsize;
}

static const struct crypto_type crypto_acomp_type = {
	.extsize = crypto_acomp_extsize,
	.init_tfm = crypto_acomp_init_tfm,
#ifdef CONFIG_PROC_FS
	.show = crypto_acomp_show,
#endif
	.report = crypto_acomp_report,
	.maskclear = ~CRYPTO_ALG_TYPE_MASK,
	.maskset = CRYPTO_ALG_TYPE_ACOMPRESS_MASK,
	.type = CRYPTO_ALG_TYPE_ACOMPRESS,
	.tfmsize = offsetof(struct crypto_acomp, base),
};

struct crypto_acomp *crypto_alloc_acomp(const char *alg_name, u32 type,
					u32 mask)
{
	return crypto_alloc_tfm(alg_name, &crypto_acomp_type, type, mask);
}
EXPORT_SYMBOL_GPL(crypto_alloc_acomp);

struct crypto_acomp *crypto_alloc_acomp_node(const char *alg_name, u32 type,
					u32 mask, int node)
{
	return crypto_alloc_tfm_node(alg_name, &crypto_acomp_type, type, mask,
				node);
}
EXPORT_SYMBOL_GPL(crypto_alloc_acomp_node);

struct acomp_req *acomp_request_alloc(struct crypto_acomp *acomp)
{
	struct crypto_tfm *tfm = crypto_acomp_tfm(acomp);
	struct acomp_req *req;

	req = __acomp_request_alloc(acomp);
	if (req && (tfm->__crt_alg->cra_type != &crypto_acomp_type))
		return crypto_acomp_scomp_alloc_ctx(req);

	return req;
}
EXPORT_SYMBOL_GPL(acomp_request_alloc);

void acomp_request_free(struct acomp_req *req)
{
	struct crypto_acomp *acomp = crypto_acomp_reqtfm(req);
	struct crypto_tfm *tfm = crypto_acomp_tfm(acomp);

	if (tfm->__crt_alg->cra_type != &crypto_acomp_type)
		crypto_acomp_scomp_free_ctx(req);

	if (req->flags & CRYPTO_ACOMP_ALLOC_OUTPUT) {
		acomp->dst_free(req->dst);
		req->dst = NULL;
	}

	__acomp_request_free(req);
}
EXPORT_SYMBOL_GPL(acomp_request_free);

int crypto_register_acomp(struct acomp_alg *alg)
{
	struct crypto_alg *base = &alg->base;

	base->cra_type = &crypto_acomp_type;
	base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK;
	base->cra_flags |= CRYPTO_ALG_TYPE_ACOMPRESS;

	return crypto_register_alg(base);
}
EXPORT_SYMBOL_GPL(crypto_register_acomp);

void crypto_unregister_acomp(struct acomp_alg *alg)
{
	crypto_unregister_alg(&alg->base);
}
EXPORT_SYMBOL_GPL(crypto_unregister_acomp);

int crypto_register_acomps(struct acomp_alg *algs, int count)
{
	int i, ret;

	for (i = 0; i < count; i++) {
		ret = crypto_register_acomp(&algs[i]);
		if (ret)
			goto err;
	}

	return 0;

err:
	for (--i; i >= 0; --i)
		crypto_unregister_acomp(&algs[i]);

	return ret;
}
EXPORT_SYMBOL_GPL(crypto_register_acomps);

void crypto_unregister_acomps(struct acomp_alg *algs, int count)
{
	int i;

	for (i = count - 1; i >= 0; --i)
		crypto_unregister_acomp(&algs[i]);
}
EXPORT_SYMBOL_GPL(crypto_unregister_acomps);

MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Asynchronous compression type");
Commit	Line	Data
2874c5fd	1	// SPDX-License-Identifier: GPL-2.0-or-later
2ebda74f GC	2	/*
	3	* Asynchronous Compression operations
	4	*
	5	* Copyright (c) 2016, Intel Corporation
	6	* Authors: Weigang Li <[email protected]>
	7	* Giovanni Cabiddu <[email protected]>
2ebda74f GC	8	*/
	9	#include <linux/errno.h>
	10	#include <linux/kernel.h>
	11	#include <linux/module.h>
	12	#include <linux/seq_file.h>
	13	#include <linux/slab.h>
	14	#include <linux/string.h>
	15	#include <linux/crypto.h>
	16	#include <crypto/algapi.h>
	17	#include <linux/cryptouser.h>
d8c34b94	18	#include <linux/compiler.h>
2ebda74f GC	19	#include <net/netlink.h>
2ebda74f GC	20	#include <crypto/internal/acompress.h>
1ab53a77	21	#include <crypto/internal/scompress.h>
2ebda74f GC	22	#include "internal.h"
2ebda74f GC	23
1ab53a77 GC	24	static const struct crypto_type crypto_acomp_type;
1ab53a77 GC	25
2ebda74f GC	26	#ifdef CONFIG_NET
	27	static int crypto_acomp_report(struct sk_buff skb, struct crypto_alg alg)
	28	{
	29	struct crypto_report_acomp racomp;
	30
37db69e0	31	memset(&racomp, 0, sizeof(racomp));
2ebda74f	32
37db69e0	33	strscpy(racomp.type, "acomp", sizeof(racomp.type));
2ebda74f	34
37db69e0	35	return nla_put(skb, CRYPTOCFGA_REPORT_ACOMP, sizeof(racomp), &racomp);
2ebda74f GC	36	}
	37	#else
	38	static int crypto_acomp_report(struct sk_buff skb, struct crypto_alg alg)
	39	{
	40	return -ENOSYS;
	41	}
	42	#endif
	43
	44	static void crypto_acomp_show(struct seq_file m, struct crypto_alg alg)
d8c34b94	45	__maybe_unused;
2ebda74f GC	46
	47	static void crypto_acomp_show(struct seq_file m, struct crypto_alg alg)
	48	{
	49	seq_puts(m, "type : acomp\n");
	50	}
	51
	52	static void crypto_acomp_exit_tfm(struct crypto_tfm *tfm)
	53	{
	54	struct crypto_acomp *acomp = __crypto_acomp_tfm(tfm);
	55	struct acomp_alg *alg = crypto_acomp_alg(acomp);
	56
	57	alg->exit(acomp);
	58	}
	59
	60	static int crypto_acomp_init_tfm(struct crypto_tfm *tfm)
	61	{
	62	struct crypto_acomp *acomp = __crypto_acomp_tfm(tfm);
	63	struct acomp_alg *alg = crypto_acomp_alg(acomp);
	64
1ab53a77 GC	65	if (tfm->__crt_alg->cra_type != &crypto_acomp_type)
	66	return crypto_init_scomp_ops_async(tfm);
	67
	68	acomp->compress = alg->compress;
	69	acomp->decompress = alg->decompress;
	70	acomp->dst_free = alg->dst_free;
	71	acomp->reqsize = alg->reqsize;
	72
2ebda74f GC	73	if (alg->exit)
	74	acomp->base.exit = crypto_acomp_exit_tfm;
	75
	76	if (alg->init)
	77	return alg->init(acomp);
	78
	79	return 0;
	80	}
	81
1ab53a77 GC	82	static unsigned int crypto_acomp_extsize(struct crypto_alg *alg)
	83	{
	84	int extsize = crypto_alg_extsize(alg);
	85
	86	if (alg->cra_type != &crypto_acomp_type)
	87	extsize += sizeof(struct crypto_scomp *);
	88
	89	return extsize;
	90	}
	91
2ebda74f	92	static const struct crypto_type crypto_acomp_type = {
1ab53a77	93	.extsize = crypto_acomp_extsize,
2ebda74f GC	94	.init_tfm = crypto_acomp_init_tfm,
	95	#ifdef CONFIG_PROC_FS
	96	.show = crypto_acomp_show,
	97	#endif
	98	.report = crypto_acomp_report,
	99	.maskclear = ~CRYPTO_ALG_TYPE_MASK,
1ab53a77	100	.maskset = CRYPTO_ALG_TYPE_ACOMPRESS_MASK,
2ebda74f GC	101	.type = CRYPTO_ALG_TYPE_ACOMPRESS,
	102	.tfmsize = offsetof(struct crypto_acomp, base),
	103	};
	104
	105	struct crypto_acomp crypto_alloc_acomp(const char alg_name, u32 type,
	106	u32 mask)
	107	{
	108	return crypto_alloc_tfm(alg_name, &crypto_acomp_type, type, mask);
	109	}
	110	EXPORT_SYMBOL_GPL(crypto_alloc_acomp);
	111
7bc13b5b BS	112	struct crypto_acomp crypto_alloc_acomp_node(const char alg_name, u32 type,
	113	u32 mask, int node)
	114	{
	115	return crypto_alloc_tfm_node(alg_name, &crypto_acomp_type, type, mask,
	116	node);
	117	}
	118	EXPORT_SYMBOL_GPL(crypto_alloc_acomp_node);
	119
1ab53a77 GC	120	struct acomp_req acomp_request_alloc(struct crypto_acomp acomp)
	121	{
	122	struct crypto_tfm *tfm = crypto_acomp_tfm(acomp);
	123	struct acomp_req *req;
	124
	125	req = __acomp_request_alloc(acomp);
	126	if (req && (tfm->__crt_alg->cra_type != &crypto_acomp_type))
	127	return crypto_acomp_scomp_alloc_ctx(req);
	128
	129	return req;
	130	}
	131	EXPORT_SYMBOL_GPL(acomp_request_alloc);
	132
	133	void acomp_request_free(struct acomp_req *req)
	134	{
	135	struct crypto_acomp *acomp = crypto_acomp_reqtfm(req);
	136	struct crypto_tfm *tfm = crypto_acomp_tfm(acomp);
	137
	138	if (tfm->__crt_alg->cra_type != &crypto_acomp_type)
	139	crypto_acomp_scomp_free_ctx(req);
	140
	141	if (req->flags & CRYPTO_ACOMP_ALLOC_OUTPUT) {
	142	acomp->dst_free(req->dst);
	143	req->dst = NULL;
	144	}
	145
	146	__acomp_request_free(req);
	147	}
	148	EXPORT_SYMBOL_GPL(acomp_request_free);
	149
2ebda74f GC	150	int crypto_register_acomp(struct acomp_alg *alg)
	151	{
	152	struct crypto_alg *base = &alg->base;
	153
	154	base->cra_type = &crypto_acomp_type;
	155	base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK;
	156	base->cra_flags \|= CRYPTO_ALG_TYPE_ACOMPRESS;
	157
	158	return crypto_register_alg(base);
	159	}
	160	EXPORT_SYMBOL_GPL(crypto_register_acomp);
	161
c6d633a9	162	void crypto_unregister_acomp(struct acomp_alg *alg)
2ebda74f	163	{
c6d633a9	164	crypto_unregister_alg(&alg->base);
2ebda74f GC	165	}
	166	EXPORT_SYMBOL_GPL(crypto_unregister_acomp);
	167
3ce5bc72 GC	168	int crypto_register_acomps(struct acomp_alg *algs, int count)
	169	{
	170	int i, ret;
	171
	172	for (i = 0; i < count; i++) {
	173	ret = crypto_register_acomp(&algs[i]);
	174	if (ret)
	175	goto err;
	176	}
	177
	178	return 0;
	179
	180	err:
	181	for (--i; i >= 0; --i)
	182	crypto_unregister_acomp(&algs[i]);
	183
	184	return ret;
	185	}
	186	EXPORT_SYMBOL_GPL(crypto_register_acomps);
	187
	188	void crypto_unregister_acomps(struct acomp_alg *algs, int count)
	189	{
	190	int i;
	191
	192	for (i = count - 1; i >= 0; --i)
	193	crypto_unregister_acomp(&algs[i]);
	194	}
	195	EXPORT_SYMBOL_GPL(crypto_unregister_acomps);
	196
2ebda74f GC	197	MODULE_LICENSE("GPL");
2ebda74f GC	198	MODULE_DESCRIPTION("Asynchronous compression type");