[linux.git] / crypto / crypto_user_stat.c

// SPDX-License-Identifier: GPL-2.0
/*
 * Crypto user configuration API.
 *
 * Copyright (C) 2017-2018 Corentin Labbe <[email protected]>
 *
 */

#include <linux/crypto.h>
#include <linux/cryptouser.h>
#include <linux/sched.h>
#include <net/netlink.h>
#include <crypto/internal/skcipher.h>
#include <crypto/internal/rng.h>
#include <crypto/akcipher.h>
#include <crypto/kpp.h>
#include <crypto/internal/cryptouser.h>

#include "internal.h"

#define null_terminated(x)	(strnlen(x, sizeof(x)) < sizeof(x))

static DEFINE_MUTEX(crypto_cfg_mutex);

extern struct sock *crypto_nlsk;

struct crypto_dump_info {
	struct sk_buff *in_skb;
	struct sk_buff *out_skb;
	u32 nlmsg_seq;
	u16 nlmsg_flags;
};

static int crypto_report_aead(struct sk_buff *skb, struct crypto_alg *alg)
{
	struct crypto_stat raead;
	u64 v64;
	u32 v32;

	strncpy(raead.type, "aead", sizeof(raead.type));

	v32 = atomic_read(&alg->encrypt_cnt);
	raead.stat_encrypt_cnt = v32;
	v64 = atomic64_read(&alg->encrypt_tlen);
	raead.stat_encrypt_tlen = v64;
	v32 = atomic_read(&alg->decrypt_cnt);
	raead.stat_decrypt_cnt = v32;
	v64 = atomic64_read(&alg->decrypt_tlen);
	raead.stat_decrypt_tlen = v64;
	v32 = atomic_read(&alg->aead_err_cnt);
	raead.stat_aead_err_cnt = v32;

	if (nla_put(skb, CRYPTOCFGA_STAT_AEAD,
		    sizeof(struct crypto_stat), &raead))
		goto nla_put_failure;
	return 0;

nla_put_failure:
	return -EMSGSIZE;
}

static int crypto_report_cipher(struct sk_buff *skb, struct crypto_alg *alg)
{
	struct crypto_stat rcipher;
	u64 v64;
	u32 v32;

	strlcpy(rcipher.type, "cipher", sizeof(rcipher.type));

	v32 = atomic_read(&alg->encrypt_cnt);
	rcipher.stat_encrypt_cnt = v32;
	v64 = atomic64_read(&alg->encrypt_tlen);
	rcipher.stat_encrypt_tlen = v64;
	v32 = atomic_read(&alg->decrypt_cnt);
	rcipher.stat_decrypt_cnt = v32;
	v64 = atomic64_read(&alg->decrypt_tlen);
	rcipher.stat_decrypt_tlen = v64;
	v32 = atomic_read(&alg->cipher_err_cnt);
	rcipher.stat_cipher_err_cnt = v32;

	if (nla_put(skb, CRYPTOCFGA_STAT_CIPHER,
		    sizeof(struct crypto_stat), &rcipher))
		goto nla_put_failure;
	return 0;

nla_put_failure:
	return -EMSGSIZE;
}

static int crypto_report_comp(struct sk_buff *skb, struct crypto_alg *alg)
{
	struct crypto_stat rcomp;
	u64 v64;
	u32 v32;

	strlcpy(rcomp.type, "compression", sizeof(rcomp.type));
	v32 = atomic_read(&alg->compress_cnt);
	rcomp.stat_compress_cnt = v32;
	v64 = atomic64_read(&alg->compress_tlen);
	rcomp.stat_compress_tlen = v64;
	v32 = atomic_read(&alg->decompress_cnt);
	rcomp.stat_decompress_cnt = v32;
	v64 = atomic64_read(&alg->decompress_tlen);
	rcomp.stat_decompress_tlen = v64;
	v32 = atomic_read(&alg->cipher_err_cnt);
	rcomp.stat_compress_err_cnt = v32;

	if (nla_put(skb, CRYPTOCFGA_STAT_COMPRESS,
		    sizeof(struct crypto_stat), &rcomp))
		goto nla_put_failure;
	return 0;

nla_put_failure:
	return -EMSGSIZE;
}

static int crypto_report_acomp(struct sk_buff *skb, struct crypto_alg *alg)
{
	struct crypto_stat racomp;
	u64 v64;
	u32 v32;

	strlcpy(racomp.type, "acomp", sizeof(racomp.type));
	v32 = atomic_read(&alg->compress_cnt);
	racomp.stat_compress_cnt = v32;
	v64 = atomic64_read(&alg->compress_tlen);
	racomp.stat_compress_tlen = v64;
	v32 = atomic_read(&alg->decompress_cnt);
	racomp.stat_decompress_cnt = v32;
	v64 = atomic64_read(&alg->decompress_tlen);
	racomp.stat_decompress_tlen = v64;
	v32 = atomic_read(&alg->cipher_err_cnt);
	racomp.stat_compress_err_cnt = v32;

	if (nla_put(skb, CRYPTOCFGA_STAT_ACOMP,
		    sizeof(struct crypto_stat), &racomp))
		goto nla_put_failure;
	return 0;

nla_put_failure:
	return -EMSGSIZE;
}

static int crypto_report_akcipher(struct sk_buff *skb, struct crypto_alg *alg)
{
	struct crypto_stat rakcipher;
	u64 v64;
	u32 v32;

	strncpy(rakcipher.type, "akcipher", sizeof(rakcipher.type));
	v32 = atomic_read(&alg->encrypt_cnt);
	rakcipher.stat_encrypt_cnt = v32;
	v64 = atomic64_read(&alg->encrypt_tlen);
	rakcipher.stat_encrypt_tlen = v64;
	v32 = atomic_read(&alg->decrypt_cnt);
	rakcipher.stat_decrypt_cnt = v32;
	v64 = atomic64_read(&alg->decrypt_tlen);
	rakcipher.stat_decrypt_tlen = v64;
	v32 = atomic_read(&alg->sign_cnt);
	rakcipher.stat_sign_cnt = v32;
	v32 = atomic_read(&alg->verify_cnt);
	rakcipher.stat_verify_cnt = v32;
	v32 = atomic_read(&alg->akcipher_err_cnt);
	rakcipher.stat_akcipher_err_cnt = v32;

	if (nla_put(skb, CRYPTOCFGA_STAT_AKCIPHER,
		    sizeof(struct crypto_stat), &rakcipher))
		goto nla_put_failure;
	return 0;

nla_put_failure:
	return -EMSGSIZE;
}

static int crypto_report_kpp(struct sk_buff *skb, struct crypto_alg *alg)
{
	struct crypto_stat rkpp;
	u32 v;

	strlcpy(rkpp.type, "kpp", sizeof(rkpp.type));

	v = atomic_read(&alg->setsecret_cnt);
	rkpp.stat_setsecret_cnt = v;
	v = atomic_read(&alg->generate_public_key_cnt);
	rkpp.stat_generate_public_key_cnt = v;
	v = atomic_read(&alg->compute_shared_secret_cnt);
	rkpp.stat_compute_shared_secret_cnt = v;
	v = atomic_read(&alg->kpp_err_cnt);
	rkpp.stat_kpp_err_cnt = v;

	if (nla_put(skb, CRYPTOCFGA_STAT_KPP,
		    sizeof(struct crypto_stat), &rkpp))
		goto nla_put_failure;
	return 0;

nla_put_failure:
	return -EMSGSIZE;
}

static int crypto_report_ahash(struct sk_buff *skb, struct crypto_alg *alg)
{
	struct crypto_stat rhash;
	u64 v64;
	u32 v32;

	strncpy(rhash.type, "ahash", sizeof(rhash.type));

	v32 = atomic_read(&alg->hash_cnt);
	rhash.stat_hash_cnt = v32;
	v64 = atomic64_read(&alg->hash_tlen);
	rhash.stat_hash_tlen = v64;
	v32 = atomic_read(&alg->hash_err_cnt);
	rhash.stat_hash_err_cnt = v32;

	if (nla_put(skb, CRYPTOCFGA_STAT_HASH,
		    sizeof(struct crypto_stat), &rhash))
		goto nla_put_failure;
	return 0;

nla_put_failure:
	return -EMSGSIZE;
}

static int crypto_report_shash(struct sk_buff *skb, struct crypto_alg *alg)
{
	struct crypto_stat rhash;
	u64 v64;
	u32 v32;

	strncpy(rhash.type, "shash", sizeof(rhash.type));

	v32 = atomic_read(&alg->hash_cnt);
	rhash.stat_hash_cnt = v32;
	v64 = atomic64_read(&alg->hash_tlen);
	rhash.stat_hash_tlen = v64;
	v32 = atomic_read(&alg->hash_err_cnt);
	rhash.stat_hash_err_cnt = v32;

	if (nla_put(skb, CRYPTOCFGA_STAT_HASH,
		    sizeof(struct crypto_stat), &rhash))
		goto nla_put_failure;
	return 0;

nla_put_failure:
	return -EMSGSIZE;
}

static int crypto_report_rng(struct sk_buff *skb, struct crypto_alg *alg)
{
	struct crypto_stat rrng;
	u64 v64;
	u32 v32;

	strncpy(rrng.type, "rng", sizeof(rrng.type));

	v32 = atomic_read(&alg->generate_cnt);
	rrng.stat_generate_cnt = v32;
	v64 = atomic64_read(&alg->generate_tlen);
	rrng.stat_generate_tlen = v64;
	v32 = atomic_read(&alg->seed_cnt);
	rrng.stat_seed_cnt = v32;
	v32 = atomic_read(&alg->hash_err_cnt);
	rrng.stat_rng_err_cnt = v32;

	if (nla_put(skb, CRYPTOCFGA_STAT_RNG,
		    sizeof(struct crypto_stat), &rrng))
		goto nla_put_failure;
	return 0;

nla_put_failure:
	return -EMSGSIZE;
}

static int crypto_reportstat_one(struct crypto_alg *alg,
				 struct crypto_user_alg *ualg,
				 struct sk_buff *skb)
{
	strlcpy(ualg->cru_name, alg->cra_name, sizeof(ualg->cru_name));
	strlcpy(ualg->cru_driver_name, alg->cra_driver_name,
		sizeof(ualg->cru_driver_name));
	strlcpy(ualg->cru_module_name, module_name(alg->cra_module),
		sizeof(ualg->cru_module_name));

	ualg->cru_type = 0;
	ualg->cru_mask = 0;
	ualg->cru_flags = alg->cra_flags;
	ualg->cru_refcnt = refcount_read(&alg->cra_refcnt);

	if (nla_put_u32(skb, CRYPTOCFGA_PRIORITY_VAL, alg->cra_priority))
		goto nla_put_failure;
	if (alg->cra_flags & CRYPTO_ALG_LARVAL) {
		struct crypto_stat rl;

		strlcpy(rl.type, "larval", sizeof(rl.type));
		if (nla_put(skb, CRYPTOCFGA_STAT_LARVAL,
			    sizeof(struct crypto_stat), &rl))
			goto nla_put_failure;
		goto out;
	}

	switch (alg->cra_flags & (CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_LARVAL)) {
	case CRYPTO_ALG_TYPE_AEAD:
		if (crypto_report_aead(skb, alg))
			goto nla_put_failure;
		break;
	case CRYPTO_ALG_TYPE_SKCIPHER:
		if (crypto_report_cipher(skb, alg))
			goto nla_put_failure;
		break;
	case CRYPTO_ALG_TYPE_BLKCIPHER:
		if (crypto_report_cipher(skb, alg))
			goto nla_put_failure;
		break;
	case CRYPTO_ALG_TYPE_CIPHER:
		if (crypto_report_cipher(skb, alg))
			goto nla_put_failure;
		break;
	case CRYPTO_ALG_TYPE_COMPRESS:
		if (crypto_report_comp(skb, alg))
			goto nla_put_failure;
		break;
	case CRYPTO_ALG_TYPE_ACOMPRESS:
		if (crypto_report_acomp(skb, alg))
			goto nla_put_failure;
		break;
	case CRYPTO_ALG_TYPE_SCOMPRESS:
		if (crypto_report_acomp(skb, alg))
			goto nla_put_failure;
		break;
	case CRYPTO_ALG_TYPE_AKCIPHER:
		if (crypto_report_akcipher(skb, alg))
			goto nla_put_failure;
		break;
	case CRYPTO_ALG_TYPE_KPP:
		if (crypto_report_kpp(skb, alg))
			goto nla_put_failure;
		break;
	case CRYPTO_ALG_TYPE_AHASH:
		if (crypto_report_ahash(skb, alg))
			goto nla_put_failure;
		break;
	case CRYPTO_ALG_TYPE_HASH:
		if (crypto_report_shash(skb, alg))
			goto nla_put_failure;
		break;
	case CRYPTO_ALG_TYPE_RNG:
		if (crypto_report_rng(skb, alg))
			goto nla_put_failure;
		break;
	default:
		pr_err("ERROR: Unhandled alg %d in %s\n",
		       alg->cra_flags & (CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_LARVAL),
		       __func__);
	}

out:
	return 0;

nla_put_failure:
	return -EMSGSIZE;
}

static int crypto_reportstat_alg(struct crypto_alg *alg,
				 struct crypto_dump_info *info)
{
	struct sk_buff *in_skb = info->in_skb;
	struct sk_buff *skb = info->out_skb;
	struct nlmsghdr *nlh;
	struct crypto_user_alg *ualg;
	int err = 0;

	nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, info->nlmsg_seq,
			CRYPTO_MSG_GETSTAT, sizeof(*ualg), info->nlmsg_flags);
	if (!nlh) {
		err = -EMSGSIZE;
		goto out;
	}

	ualg = nlmsg_data(nlh);

	err = crypto_reportstat_one(alg, ualg, skb);
	if (err) {
		nlmsg_cancel(skb, nlh);
		goto out;
	}

	nlmsg_end(skb, nlh);

out:
	return err;
}

int crypto_reportstat(struct sk_buff *in_skb, struct nlmsghdr *in_nlh,
		      struct nlattr **attrs)
{
	struct crypto_user_alg *p = nlmsg_data(in_nlh);
	struct crypto_alg *alg;
	struct sk_buff *skb;
	struct crypto_dump_info info;
	int err;

	if (!null_terminated(p->cru_name) || !null_terminated(p->cru_driver_name))
		return -EINVAL;

	alg = crypto_alg_match(p, 0);
	if (!alg)
		return -ENOENT;

	err = -ENOMEM;
	skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
	if (!skb)
		goto drop_alg;

	info.in_skb = in_skb;
	info.out_skb = skb;
	info.nlmsg_seq = in_nlh->nlmsg_seq;
	info.nlmsg_flags = 0;

	err = crypto_reportstat_alg(alg, &info);

drop_alg:
	crypto_mod_put(alg);

	if (err)
		return err;

	return nlmsg_unicast(crypto_nlsk, skb, NETLINK_CB(in_skb).portid);
}

int crypto_dump_reportstat(struct sk_buff *skb, struct netlink_callback *cb)
{
	struct crypto_alg *alg;
	struct crypto_dump_info info;
	int err;

	if (cb->args[0])
		goto out;

	cb->args[0] = 1;

	info.in_skb = cb->skb;
	info.out_skb = skb;
	info.nlmsg_seq = cb->nlh->nlmsg_seq;
	info.nlmsg_flags = NLM_F_MULTI;

	list_for_each_entry(alg, &crypto_alg_list, cra_list) {
		err = crypto_reportstat_alg(alg, &info);
		if (err)
			goto out_err;
	}

out:
	return skb->len;
out_err:
	return err;
}

int crypto_dump_reportstat_done(struct netlink_callback *cb)
{
	return 0;
}

MODULE_LICENSE("GPL");
Commit	Line	Data
cac5818c CL	1	// SPDX-License-Identifier: GPL-2.0
	2	/*
	3	* Crypto user configuration API.
	4	*
	5	* Copyright (C) 2017-2018 Corentin Labbe <[email protected]>
	6	*
	7	*/
	8
	9	#include <linux/crypto.h>
	10	#include <linux/cryptouser.h>
	11	#include <linux/sched.h>
	12	#include <net/netlink.h>
	13	#include <crypto/internal/skcipher.h>
	14	#include <crypto/internal/rng.h>
	15	#include <crypto/akcipher.h>
	16	#include <crypto/kpp.h>
	17	#include <crypto/internal/cryptouser.h>
	18
	19	#include "internal.h"
	20
	21	#define null_terminated(x) (strnlen(x, sizeof(x)) < sizeof(x))
	22
	23	static DEFINE_MUTEX(crypto_cfg_mutex);
	24
	25	extern struct sock *crypto_nlsk;
	26
	27	struct crypto_dump_info {
	28	struct sk_buff *in_skb;
	29	struct sk_buff *out_skb;
	30	u32 nlmsg_seq;
	31	u16 nlmsg_flags;
	32	};
	33
	34	static int crypto_report_aead(struct sk_buff skb, struct crypto_alg alg)
	35	{
	36	struct crypto_stat raead;
	37	u64 v64;
	38	u32 v32;
	39
	40	strncpy(raead.type, "aead", sizeof(raead.type));
	41
	42	v32 = atomic_read(&alg->encrypt_cnt);
	43	raead.stat_encrypt_cnt = v32;
	44	v64 = atomic64_read(&alg->encrypt_tlen);
	45	raead.stat_encrypt_tlen = v64;
	46	v32 = atomic_read(&alg->decrypt_cnt);
	47	raead.stat_decrypt_cnt = v32;
	48	v64 = atomic64_read(&alg->decrypt_tlen);
	49	raead.stat_decrypt_tlen = v64;
	50	v32 = atomic_read(&alg->aead_err_cnt);
	51	raead.stat_aead_err_cnt = v32;
	52
	53	if (nla_put(skb, CRYPTOCFGA_STAT_AEAD,
	54	sizeof(struct crypto_stat), &raead))
	55	goto nla_put_failure;
	56	return 0;
	57
	58	nla_put_failure:
	59	return -EMSGSIZE;
	60	}
	61
	62	static int crypto_report_cipher(struct sk_buff skb, struct crypto_alg alg)
	63	{
	64	struct crypto_stat rcipher;
65	u64 v64;
66	u32 v32;
67
68	strlcpy(rcipher.type, "cipher", sizeof(rcipher.type));
69
70	v32 = atomic_read(&alg->encrypt_cnt);
71	rcipher.stat_encrypt_cnt = v32;
72	v64 = atomic64_read(&alg->encrypt_tlen);
73	rcipher.stat_encrypt_tlen = v64;
74	v32 = atomic_read(&alg->decrypt_cnt);
75	rcipher.stat_decrypt_cnt = v32;
76	v64 = atomic64_read(&alg->decrypt_tlen);
77	rcipher.stat_decrypt_tlen = v64;
78	v32 = atomic_read(&alg->cipher_err_cnt);
79	rcipher.stat_cipher_err_cnt = v32;
80
81	if (nla_put(skb, CRYPTOCFGA_STAT_CIPHER,
82	sizeof(struct crypto_stat), &rcipher))
83	goto nla_put_failure;
84	return 0;
85
86	nla_put_failure:
87	return -EMSGSIZE;
88	}
89
90	static int crypto_report_comp(struct sk_buff skb, struct crypto_alg alg)
91	{
92	struct crypto_stat rcomp;
93	u64 v64;
94	u32 v32;
95
96	strlcpy(rcomp.type, "compression", sizeof(rcomp.type));
97	v32 = atomic_read(&alg->compress_cnt);
98	rcomp.stat_compress_cnt = v32;
99	v64 = atomic64_read(&alg->compress_tlen);
100	rcomp.stat_compress_tlen = v64;
101	v32 = atomic_read(&alg->decompress_cnt);
102	rcomp.stat_decompress_cnt = v32;
103	v64 = atomic64_read(&alg->decompress_tlen);
104	rcomp.stat_decompress_tlen = v64;
105	v32 = atomic_read(&alg->cipher_err_cnt);
106	rcomp.stat_compress_err_cnt = v32;
107
108	if (nla_put(skb, CRYPTOCFGA_STAT_COMPRESS,
109	sizeof(struct crypto_stat), &rcomp))
110	goto nla_put_failure;
111	return 0;
112
113	nla_put_failure:
114	return -EMSGSIZE;
115	}
116
117	static int crypto_report_acomp(struct sk_buff skb, struct crypto_alg alg)
118	{
119	struct crypto_stat racomp;
120	u64 v64;
121	u32 v32;
122
123	strlcpy(racomp.type, "acomp", sizeof(racomp.type));
124	v32 = atomic_read(&alg->compress_cnt);
125	racomp.stat_compress_cnt = v32;
126	v64 = atomic64_read(&alg->compress_tlen);
127	racomp.stat_compress_tlen = v64;
128	v32 = atomic_read(&alg->decompress_cnt);
129	racomp.stat_decompress_cnt = v32;
130	v64 = atomic64_read(&alg->decompress_tlen);
131	racomp.stat_decompress_tlen = v64;
132	v32 = atomic_read(&alg->cipher_err_cnt);
133	racomp.stat_compress_err_cnt = v32;
134
135	if (nla_put(skb, CRYPTOCFGA_STAT_ACOMP,
136	sizeof(struct crypto_stat), &racomp))
137	goto nla_put_failure;
138	return 0;
139
140	nla_put_failure:
141	return -EMSGSIZE;
142	}
143
144	static int crypto_report_akcipher(struct sk_buff skb, struct crypto_alg alg)
145	{
146	struct crypto_stat rakcipher;
147	u64 v64;
148	u32 v32;
149
150	strncpy(rakcipher.type, "akcipher", sizeof(rakcipher.type));
151	v32 = atomic_read(&alg->encrypt_cnt);
152	rakcipher.stat_encrypt_cnt = v32;
153	v64 = atomic64_read(&alg->encrypt_tlen);
154	rakcipher.stat_encrypt_tlen = v64;
155	v32 = atomic_read(&alg->decrypt_cnt);
156	rakcipher.stat_decrypt_cnt = v32;
157	v64 = atomic64_read(&alg->decrypt_tlen);
158	rakcipher.stat_decrypt_tlen = v64;
159	v32 = atomic_read(&alg->sign_cnt);
160	rakcipher.stat_sign_cnt = v32;
161	v32 = atomic_read(&alg->verify_cnt);
162	rakcipher.stat_verify_cnt = v32;
163	v32 = atomic_read(&alg->akcipher_err_cnt);
164	rakcipher.stat_akcipher_err_cnt = v32;
165
166	if (nla_put(skb, CRYPTOCFGA_STAT_AKCIPHER,
167	sizeof(struct crypto_stat), &rakcipher))
168	goto nla_put_failure;
169	return 0;
170
171	nla_put_failure:
172	return -EMSGSIZE;
173	}
174
175	static int crypto_report_kpp(struct sk_buff skb, struct crypto_alg alg)
176	{
177	struct crypto_stat rkpp;
178	u32 v;
179
180	strlcpy(rkpp.type, "kpp", sizeof(rkpp.type));
181
182	v = atomic_read(&alg->setsecret_cnt);
183	rkpp.stat_setsecret_cnt = v;
184	v = atomic_read(&alg->generate_public_key_cnt);
185	rkpp.stat_generate_public_key_cnt = v;
186	v = atomic_read(&alg->compute_shared_secret_cnt);
187	rkpp.stat_compute_shared_secret_cnt = v;
188	v = atomic_read(&alg->kpp_err_cnt);
189	rkpp.stat_kpp_err_cnt = v;
190
191	if (nla_put(skb, CRYPTOCFGA_STAT_KPP,
192	sizeof(struct crypto_stat), &rkpp))
193	goto nla_put_failure;
194	return 0;
195
196	nla_put_failure:
197	return -EMSGSIZE;
198	}
199
200	static int crypto_report_ahash(struct sk_buff skb, struct crypto_alg alg)
201	{
202	struct crypto_stat rhash;
203	u64 v64;
204	u32 v32;
205
206	strncpy(rhash.type, "ahash", sizeof(rhash.type));
207
208	v32 = atomic_read(&alg->hash_cnt);
209	rhash.stat_hash_cnt = v32;
210	v64 = atomic64_read(&alg->hash_tlen);
211	rhash.stat_hash_tlen = v64;
212	v32 = atomic_read(&alg->hash_err_cnt);
213	rhash.stat_hash_err_cnt = v32;
214
215	if (nla_put(skb, CRYPTOCFGA_STAT_HASH,
216	sizeof(struct crypto_stat), &rhash))
217	goto nla_put_failure;
218	return 0;
219
220	nla_put_failure:
221	return -EMSGSIZE;
222	}
223
224	static int crypto_report_shash(struct sk_buff skb, struct crypto_alg alg)
225	{
226	struct crypto_stat rhash;
227	u64 v64;
228	u32 v32;
229
230	strncpy(rhash.type, "shash", sizeof(rhash.type));
231
232	v32 = atomic_read(&alg->hash_cnt);
233	rhash.stat_hash_cnt = v32;
234	v64 = atomic64_read(&alg->hash_tlen);
235	rhash.stat_hash_tlen = v64;
236	v32 = atomic_read(&alg->hash_err_cnt);
237	rhash.stat_hash_err_cnt = v32;
238
239	if (nla_put(skb, CRYPTOCFGA_STAT_HASH,
240	sizeof(struct crypto_stat), &rhash))
241	goto nla_put_failure;
242	return 0;
243
244	nla_put_failure:
245	return -EMSGSIZE;
246	}
247
248	static int crypto_report_rng(struct sk_buff skb, struct crypto_alg alg)
249	{
250	struct crypto_stat rrng;
251	u64 v64;
252	u32 v32;
253
254	strncpy(rrng.type, "rng", sizeof(rrng.type));
255
256	v32 = atomic_read(&alg->generate_cnt);
257	rrng.stat_generate_cnt = v32;
258	v64 = atomic64_read(&alg->generate_tlen);
259	rrng.stat_generate_tlen = v64;
260	v32 = atomic_read(&alg->seed_cnt);
261	rrng.stat_seed_cnt = v32;
262	v32 = atomic_read(&alg->hash_err_cnt);
263	rrng.stat_rng_err_cnt = v32;
264
265	if (nla_put(skb, CRYPTOCFGA_STAT_RNG,
266	sizeof(struct crypto_stat), &rrng))
267	goto nla_put_failure;
268	return 0;
269
270	nla_put_failure:
271	return -EMSGSIZE;
272	}
273
274	static int crypto_reportstat_one(struct crypto_alg *alg,
275	struct crypto_user_alg *ualg,
276	struct sk_buff *skb)
277	{
278	strlcpy(ualg->cru_name, alg->cra_name, sizeof(ualg->cru_name));
279	strlcpy(ualg->cru_driver_name, alg->cra_driver_name,
280	sizeof(ualg->cru_driver_name));
281	strlcpy(ualg->cru_module_name, module_name(alg->cra_module),
282	sizeof(ualg->cru_module_name));
283
284	ualg->cru_type = 0;
285	ualg->cru_mask = 0;
286	ualg->cru_flags = alg->cra_flags;
287	ualg->cru_refcnt = refcount_read(&alg->cra_refcnt);
288
289	if (nla_put_u32(skb, CRYPTOCFGA_PRIORITY_VAL, alg->cra_priority))
290	goto nla_put_failure;
291	if (alg->cra_flags & CRYPTO_ALG_LARVAL) {
292	struct crypto_stat rl;
293
294	strlcpy(rl.type, "larval", sizeof(rl.type));
295	if (nla_put(skb, CRYPTOCFGA_STAT_LARVAL,
296	sizeof(struct crypto_stat), &rl))
297	goto nla_put_failure;
298	goto out;
299	}
300
301	switch (alg->cra_flags & (CRYPTO_ALG_TYPE_MASK \| CRYPTO_ALG_LARVAL)) {
302	case CRYPTO_ALG_TYPE_AEAD:
303	if (crypto_report_aead(skb, alg))
304	goto nla_put_failure;
305	break;
306	case CRYPTO_ALG_TYPE_SKCIPHER:
307	if (crypto_report_cipher(skb, alg))
308	goto nla_put_failure;
309	break;
310	case CRYPTO_ALG_TYPE_BLKCIPHER:
311	if (crypto_report_cipher(skb, alg))
312	goto nla_put_failure;
313	break;
314	case CRYPTO_ALG_TYPE_CIPHER:
315	if (crypto_report_cipher(skb, alg))
316	goto nla_put_failure;
317	break;
318	case CRYPTO_ALG_TYPE_COMPRESS:
319	if (crypto_report_comp(skb, alg))
320	goto nla_put_failure;
321	break;
322	case CRYPTO_ALG_TYPE_ACOMPRESS:
323	if (crypto_report_acomp(skb, alg))
324	goto nla_put_failure;
325	break;
326	case CRYPTO_ALG_TYPE_SCOMPRESS:
327	if (crypto_report_acomp(skb, alg))
328	goto nla_put_failure;
329	break;
330	case CRYPTO_ALG_TYPE_AKCIPHER:
331	if (crypto_report_akcipher(skb, alg))
332	goto nla_put_failure;
333	break;
334	case CRYPTO_ALG_TYPE_KPP:
335	if (crypto_report_kpp(skb, alg))
336	goto nla_put_failure;
337	break;
338	case CRYPTO_ALG_TYPE_AHASH:
339	if (crypto_report_ahash(skb, alg))
340	goto nla_put_failure;
341	break;
342	case CRYPTO_ALG_TYPE_HASH:
343	if (crypto_report_shash(skb, alg))
344	goto nla_put_failure;
345	break;
346	case CRYPTO_ALG_TYPE_RNG:
347	if (crypto_report_rng(skb, alg))
348	goto nla_put_failure;
349	break;
350	default:
351	pr_err("ERROR: Unhandled alg %d in %s\n",
352	alg->cra_flags & (CRYPTO_ALG_TYPE_MASK \| CRYPTO_ALG_LARVAL),
353	__func__);
354	}
355
356	out:
357	return 0;
358
359	nla_put_failure:
360	return -EMSGSIZE;
361	}
362
363	static int crypto_reportstat_alg(struct crypto_alg *alg,
364	struct crypto_dump_info *info)
365	{
366	struct sk_buff *in_skb = info->in_skb;
367	struct sk_buff *skb = info->out_skb;
368	struct nlmsghdr *nlh;
369	struct crypto_user_alg *ualg;
370	int err = 0;
371
372	nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, info->nlmsg_seq,
373	CRYPTO_MSG_GETSTAT, sizeof(*ualg), info->nlmsg_flags);
374	if (!nlh) {
375	err = -EMSGSIZE;
376	goto out;
377	}
378
379	ualg = nlmsg_data(nlh);
380
381	err = crypto_reportstat_one(alg, ualg, skb);
382	if (err) {
383	nlmsg_cancel(skb, nlh);
384	goto out;
385	}
386
387	nlmsg_end(skb, nlh);
388
389	out:
390	return err;
391	}
392
393	int crypto_reportstat(struct sk_buff in_skb, struct nlmsghdr in_nlh,
394	struct nlattr **attrs)
395	{
396	struct crypto_user_alg *p = nlmsg_data(in_nlh);
397	struct crypto_alg *alg;
398	struct sk_buff *skb;
399	struct crypto_dump_info info;
400	int err;
401
402	if (!null_terminated(p->cru_name) \|\| !null_terminated(p->cru_driver_name))
403	return -EINVAL;
404
405	alg = crypto_alg_match(p, 0);
406	if (!alg)
407	return -ENOENT;
408
409	err = -ENOMEM;
410	skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
411	if (!skb)
412	goto drop_alg;
413
414	info.in_skb = in_skb;
415	info.out_skb = skb;
416	info.nlmsg_seq = in_nlh->nlmsg_seq;
417	info.nlmsg_flags = 0;
418
419	err = crypto_reportstat_alg(alg, &info);
420
421	drop_alg:
422	crypto_mod_put(alg);
423
424	if (err)
425	return err;
426
427	return nlmsg_unicast(crypto_nlsk, skb, NETLINK_CB(in_skb).portid);
428	}
429
430	int crypto_dump_reportstat(struct sk_buff skb, struct netlink_callback cb)
431	{
432	struct crypto_alg *alg;
433	struct crypto_dump_info info;
434	int err;
435
436	if (cb->args[0])
437	goto out;
438
439	cb->args[0] = 1;
440
441	info.in_skb = cb->skb;
442	info.out_skb = skb;
443	info.nlmsg_seq = cb->nlh->nlmsg_seq;
444	info.nlmsg_flags = NLM_F_MULTI;
445
446	list_for_each_entry(alg, &crypto_alg_list, cra_list) {
447	err = crypto_reportstat_alg(alg, &info);
448	if (err)
449	goto out_err;
450	}
451
452	out:
453	return skb->len;
454	out_err:
455	return err;
456	}
457
458	int crypto_dump_reportstat_done(struct netlink_callback *cb)
459	{
460	return 0;
461	}
462
463	MODULE_LICENSE("GPL");