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

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Asynchronous Compression operations
 *
 * Copyright (c) 2016, Intel Corporation
 * Authors: Weigang Li <weigang.li@intel.com>
 *          Giovanni Cabiddu <giovanni.cabiddu@intel.com>
 */

#include <crypto/internal/acompress.h>
#include <linux/cryptouser.h>
#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 <net/netlink.h>

#include "compress.h"

struct crypto_scomp;

static const struct crypto_type crypto_acomp_type;

static inline struct acomp_alg *__crypto_acomp_alg(struct crypto_alg *alg)
{
	return container_of(alg, struct acomp_alg, calg.base);
}

static inline struct acomp_alg *crypto_acomp_alg(struct crypto_acomp *tfm)
{
	return __crypto_acomp_alg(crypto_acomp_tfm(tfm)->__crt_alg);
}

static int __maybe_unused 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);
}

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
#if IS_ENABLED(CONFIG_CRYPTO_USER)
	.report = crypto_acomp_report,
#endif
	.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);

void comp_prepare_alg(struct comp_alg_common *alg)
{
	struct crypto_alg *base = &alg->base;

	base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK;
}

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

	comp_prepare_alg(&alg->calg);

	base->cra_type = &crypto_acomp_type;
	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 <weigang.li@intel.com>
	7	* Giovanni Cabiddu <giovanni.cabiddu@intel.com>
2ebda74f	8	*/
0a742389 HX	9
	10	#include <crypto/internal/acompress.h>
	11	#include <linux/cryptouser.h>
2ebda74f GC	12	#include <linux/errno.h>
	13	#include <linux/kernel.h>
	14	#include <linux/module.h>
	15	#include <linux/seq_file.h>
	16	#include <linux/slab.h>
	17	#include <linux/string.h>
2ebda74f	18	#include <net/netlink.h>
0a742389 HX	19
	20	#include "compress.h"
	21
	22	struct crypto_scomp;
2ebda74f	23
1ab53a77 GC	24	static const struct crypto_type crypto_acomp_type;
1ab53a77 GC	25
0a742389 HX	26	static inline struct acomp_alg __crypto_acomp_alg(struct crypto_alg alg)
	27	{
	28	return container_of(alg, struct acomp_alg, calg.base);
	29	}
	30
	31	static inline struct acomp_alg crypto_acomp_alg(struct crypto_acomp tfm)
	32	{
	33	return __crypto_acomp_alg(crypto_acomp_tfm(tfm)->__crt_alg);
	34	}
	35
c0f9e01d HX	36	static int __maybe_unused crypto_acomp_report(
c0f9e01d HX	37	struct sk_buff skb, struct crypto_alg alg)
2ebda74f GC	38	{
	39	struct crypto_report_acomp racomp;
	40
37db69e0	41	memset(&racomp, 0, sizeof(racomp));
2ebda74f	42
37db69e0	43	strscpy(racomp.type, "acomp", sizeof(racomp.type));
2ebda74f	44
37db69e0	45	return nla_put(skb, CRYPTOCFGA_REPORT_ACOMP, sizeof(racomp), &racomp);
2ebda74f	46	}
2ebda74f GC	47
2ebda74f GC	48	static void crypto_acomp_show(struct seq_file m, struct crypto_alg alg)
d8c34b94	49	__maybe_unused;
2ebda74f GC	50
	51	static void crypto_acomp_show(struct seq_file m, struct crypto_alg alg)
	52	{
	53	seq_puts(m, "type : acomp\n");
	54	}
	55
	56	static void crypto_acomp_exit_tfm(struct crypto_tfm *tfm)
	57	{
	58	struct crypto_acomp *acomp = __crypto_acomp_tfm(tfm);
	59	struct acomp_alg *alg = crypto_acomp_alg(acomp);
	60
	61	alg->exit(acomp);
	62	}
	63
	64	static int crypto_acomp_init_tfm(struct crypto_tfm *tfm)
	65	{
	66	struct crypto_acomp *acomp = __crypto_acomp_tfm(tfm);
	67	struct acomp_alg *alg = crypto_acomp_alg(acomp);
	68
1ab53a77 GC	69	if (tfm->__crt_alg->cra_type != &crypto_acomp_type)
	70	return crypto_init_scomp_ops_async(tfm);
	71
	72	acomp->compress = alg->compress;
	73	acomp->decompress = alg->decompress;
	74	acomp->dst_free = alg->dst_free;
	75	acomp->reqsize = alg->reqsize;
	76
2ebda74f GC	77	if (alg->exit)
	78	acomp->base.exit = crypto_acomp_exit_tfm;
	79
	80	if (alg->init)
	81	return alg->init(acomp);
	82
	83	return 0;
	84	}
	85
1ab53a77 GC	86	static unsigned int crypto_acomp_extsize(struct crypto_alg *alg)
	87	{
	88	int extsize = crypto_alg_extsize(alg);
	89
	90	if (alg->cra_type != &crypto_acomp_type)
	91	extsize += sizeof(struct crypto_scomp *);
	92
	93	return extsize;
	94	}
	95
2ebda74f	96	static const struct crypto_type crypto_acomp_type = {
1ab53a77	97	.extsize = crypto_acomp_extsize,
2ebda74f GC	98	.init_tfm = crypto_acomp_init_tfm,
	99	#ifdef CONFIG_PROC_FS
	100	.show = crypto_acomp_show,
	101	#endif
b8969a1b	102	#if IS_ENABLED(CONFIG_CRYPTO_USER)
2ebda74f	103	.report = crypto_acomp_report,
0a742389	104	#endif
2ebda74f	105	.maskclear = ~CRYPTO_ALG_TYPE_MASK,
1ab53a77	106	.maskset = CRYPTO_ALG_TYPE_ACOMPRESS_MASK,
2ebda74f GC	107	.type = CRYPTO_ALG_TYPE_ACOMPRESS,
	108	.tfmsize = offsetof(struct crypto_acomp, base),
	109	};
	110
	111	struct crypto_acomp crypto_alloc_acomp(const char alg_name, u32 type,
	112	u32 mask)
	113	{
	114	return crypto_alloc_tfm(alg_name, &crypto_acomp_type, type, mask);
	115	}
	116	EXPORT_SYMBOL_GPL(crypto_alloc_acomp);
	117
7bc13b5b BS	118	struct crypto_acomp crypto_alloc_acomp_node(const char alg_name, u32 type,
	119	u32 mask, int node)
	120	{
	121	return crypto_alloc_tfm_node(alg_name, &crypto_acomp_type, type, mask,
	122	node);
	123	}
	124	EXPORT_SYMBOL_GPL(crypto_alloc_acomp_node);
	125
1ab53a77 GC	126	struct acomp_req acomp_request_alloc(struct crypto_acomp acomp)
	127	{
	128	struct crypto_tfm *tfm = crypto_acomp_tfm(acomp);
	129	struct acomp_req *req;
	130
	131	req = __acomp_request_alloc(acomp);
	132	if (req && (tfm->__crt_alg->cra_type != &crypto_acomp_type))
	133	return crypto_acomp_scomp_alloc_ctx(req);
	134
	135	return req;
	136	}
	137	EXPORT_SYMBOL_GPL(acomp_request_alloc);
	138
	139	void acomp_request_free(struct acomp_req *req)
	140	{
	141	struct crypto_acomp *acomp = crypto_acomp_reqtfm(req);
	142	struct crypto_tfm *tfm = crypto_acomp_tfm(acomp);
	143
	144	if (tfm->__crt_alg->cra_type != &crypto_acomp_type)
	145	crypto_acomp_scomp_free_ctx(req);
	146
	147	if (req->flags & CRYPTO_ACOMP_ALLOC_OUTPUT) {
	148	acomp->dst_free(req->dst);
	149	req->dst = NULL;
	150	}
	151
	152	__acomp_request_free(req);
	153	}
	154	EXPORT_SYMBOL_GPL(acomp_request_free);
	155
0a742389	156	void comp_prepare_alg(struct comp_alg_common *alg)
2ebda74f GC	157	{
	158	struct crypto_alg *base = &alg->base;
	159
2ebda74f	160	base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK;
0a742389 HX	161	}
	162
	163	int crypto_register_acomp(struct acomp_alg *alg)
	164	{
	165	struct crypto_alg *base = &alg->calg.base;
	166
	167	comp_prepare_alg(&alg->calg);
	168
	169	base->cra_type = &crypto_acomp_type;
2ebda74f GC	170	base->cra_flags \|= CRYPTO_ALG_TYPE_ACOMPRESS;
	171
	172	return crypto_register_alg(base);
	173	}
	174	EXPORT_SYMBOL_GPL(crypto_register_acomp);
	175
c6d633a9	176	void crypto_unregister_acomp(struct acomp_alg *alg)
2ebda74f	177	{
c6d633a9	178	crypto_unregister_alg(&alg->base);
2ebda74f GC	179	}
	180	EXPORT_SYMBOL_GPL(crypto_unregister_acomp);
	181
3ce5bc72 GC	182	int crypto_register_acomps(struct acomp_alg *algs, int count)
	183	{
	184	int i, ret;
	185
	186	for (i = 0; i < count; i++) {
	187	ret = crypto_register_acomp(&algs[i]);
	188	if (ret)
	189	goto err;
	190	}
	191
	192	return 0;
	193
	194	err:
	195	for (--i; i >= 0; --i)
	196	crypto_unregister_acomp(&algs[i]);
	197
	198	return ret;
	199	}
	200	EXPORT_SYMBOL_GPL(crypto_register_acomps);
	201
	202	void crypto_unregister_acomps(struct acomp_alg *algs, int count)
	203	{
	204	int i;
	205
	206	for (i = count - 1; i >= 0; --i)
	207	crypto_unregister_acomp(&algs[i]);
	208	}
	209	EXPORT_SYMBOL_GPL(crypto_unregister_acomps);
	210
2ebda74f GC	211	MODULE_LICENSE("GPL");
2ebda74f GC	212	MODULE_DESCRIPTION("Asynchronous compression type");