Revert "crypto: remove CONFIG_CRYPTO_STATS"

This reverts commit 2beb81fbf0c01a62515a1bcef326168494ee2bd0.

While removing CONFIG_CRYPTO_STATS is a worthy goal, this also
removed unrelated infrastructure such as crypto_comp_alg_common.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

32 files changed, 1139 insertions, 77 deletions

diff --git a/arch/s390/configs/debug_defconfig b/arch/s390/configs/debug_defconfig
index 063f0c11087d..cae2dd34fbb4 100644
--- a/arch/s390/configs/debug_defconfig
+++ b/arch/s390/configs/debug_defconfig
@@ -766,6 +766,7 @@ CONFIG_CRYPTO_USER_API_HASH=m
 CONFIG_CRYPTO_USER_API_SKCIPHER=m
 CONFIG_CRYPTO_USER_API_RNG=m
 CONFIG_CRYPTO_USER_API_AEAD=m
+CONFIG_CRYPTO_STATS=y
 CONFIG_CRYPTO_CRC32_S390=y
 CONFIG_CRYPTO_SHA512_S390=m
 CONFIG_CRYPTO_SHA1_S390=m
diff --git a/arch/s390/configs/defconfig b/arch/s390/configs/defconfig
index ab608ce768b7..42b988873e54 100644
--- a/arch/s390/configs/defconfig
+++ b/arch/s390/configs/defconfig
@@ -752,6 +752,7 @@ CONFIG_CRYPTO_USER_API_HASH=m
 CONFIG_CRYPTO_USER_API_SKCIPHER=m
 CONFIG_CRYPTO_USER_API_RNG=m
 CONFIG_CRYPTO_USER_API_AEAD=m
+CONFIG_CRYPTO_STATS=y
 CONFIG_CRYPTO_CRC32_S390=y
 CONFIG_CRYPTO_SHA512_S390=m
 CONFIG_CRYPTO_SHA1_S390=m
diff --git a/crypto/Kconfig b/crypto/Kconfig
index f937142aa94d..44661c2e30ca 100644
--- a/crypto/Kconfig
+++ b/crypto/Kconfig
@@ -1456,6 +1456,26 @@ config CRYPTO_USER_API_ENABLE_OBSOLETE
 	  already been phased out from internal use by the kernel, and are
 	  only useful for userspace clients that still rely on them.
 
+config CRYPTO_STATS
+	bool "Crypto usage statistics"
+	depends on CRYPTO_USER
+	help
+	  Enable the gathering of crypto stats.
+
+	  Enabling this option reduces the performance of the crypto API.  It
+	  should only be enabled when there is actually a use case for it.
+
+	  This collects data sizes, numbers of requests, and numbers
+	  of errors processed by:
+	  - AEAD ciphers (encrypt, decrypt)
+	  - asymmetric key ciphers (encrypt, decrypt, verify, sign)
+	  - symmetric key ciphers (encrypt, decrypt)
+	  - compression algorithms (compress, decompress)
+	  - hash algorithms (hash)
+	  - key-agreement protocol primitives (setsecret, generate
+	    public key, compute shared secret)
+	  - RNG (generate, seed)
+
 endmenu
 
 config CRYPTO_HASH_INFO
diff --git a/crypto/Makefile b/crypto/Makefile
index de9a3312a2c8..408f0a1f9ab9 100644
--- a/crypto/Makefile
+++ b/crypto/Makefile
@@ -69,6 +69,8 @@ cryptomgr-y := algboss.o testmgr.o
 
 obj-$(CONFIG_CRYPTO_MANAGER2) += cryptomgr.o
 obj-$(CONFIG_CRYPTO_USER) += crypto_user.o
+crypto_user-y := crypto_user_base.o
+crypto_user-$(CONFIG_CRYPTO_STATS) += crypto_user_stat.o
 obj-$(CONFIG_CRYPTO_CMAC) += cmac.o
 obj-$(CONFIG_CRYPTO_HMAC) += hmac.o
 obj-$(CONFIG_CRYPTO_VMAC) += vmac.o
diff --git a/crypto/acompress.c b/crypto/acompress.c
index 484a865b23cd..1c682810a484 100644
--- a/crypto/acompress.c
+++ b/crypto/acompress.c
@@ -25,7 +25,7 @@ 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, base);
+	return container_of(alg, struct acomp_alg, calg.base);
 }
 
 static inline struct acomp_alg *crypto_acomp_alg(struct crypto_acomp *tfm)
@@ -93,6 +93,32 @@ static unsigned int crypto_acomp_extsize(struct crypto_alg *alg)
 	return extsize;
 }
 
+static inline int __crypto_acomp_report_stat(struct sk_buff *skb,
+					     struct crypto_alg *alg)
+{
+	struct comp_alg_common *calg = __crypto_comp_alg_common(alg);
+	struct crypto_istat_compress *istat = comp_get_stat(calg);
+	struct crypto_stat_compress racomp;
+
+	memset(&racomp, 0, sizeof(racomp));
+
+	strscpy(racomp.type, "acomp", sizeof(racomp.type));
+	racomp.stat_compress_cnt = atomic64_read(&istat->compress_cnt);
+	racomp.stat_compress_tlen = atomic64_read(&istat->compress_tlen);
+	racomp.stat_decompress_cnt =  atomic64_read(&istat->decompress_cnt);
+	racomp.stat_decompress_tlen = atomic64_read(&istat->decompress_tlen);
+	racomp.stat_err_cnt = atomic64_read(&istat->err_cnt);
+
+	return nla_put(skb, CRYPTOCFGA_STAT_ACOMP, sizeof(racomp), &racomp);
+}
+
+#ifdef CONFIG_CRYPTO_STATS
+int crypto_acomp_report_stat(struct sk_buff *skb, struct crypto_alg *alg)
+{
+	return __crypto_acomp_report_stat(skb, alg);
+}
+#endif
+
 static const struct crypto_type crypto_acomp_type = {
 	.extsize = crypto_acomp_extsize,
 	.init_tfm = crypto_acomp_init_tfm,
@@ -102,6 +128,9 @@ static const struct crypto_type crypto_acomp_type = {
 #if IS_ENABLED(CONFIG_CRYPTO_USER)
 	.report = crypto_acomp_report,
 #endif
+#ifdef CONFIG_CRYPTO_STATS
+	.report_stat = crypto_acomp_report_stat,
+#endif
 	.maskclear = ~CRYPTO_ALG_TYPE_MASK,
 	.maskset = CRYPTO_ALG_TYPE_ACOMPRESS_MASK,
 	.type = CRYPTO_ALG_TYPE_ACOMPRESS,
@@ -153,12 +182,24 @@ void acomp_request_free(struct acomp_req *req)
 }
 EXPORT_SYMBOL_GPL(acomp_request_free);
 
-int crypto_register_acomp(struct acomp_alg *alg)
+void comp_prepare_alg(struct comp_alg_common *alg)
 {
+	struct crypto_istat_compress *istat = comp_get_stat(alg);
 	struct crypto_alg *base = &alg->base;
 
-	base->cra_type = &crypto_acomp_type;
 	base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK;
+
+	if (IS_ENABLED(CONFIG_CRYPTO_STATS))
+		memset(istat, 0, sizeof(*istat));
+}
+
+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);
diff --git a/crypto/aead.c b/crypto/aead.c
index 0e75a69189df..54906633566a 100644
--- a/crypto/aead.c
+++ b/crypto/aead.c
@@ -20,6 +20,15 @@
 
 #include "internal.h"
 
+static inline struct crypto_istat_aead *aead_get_stat(struct aead_alg *alg)
+{
+#ifdef CONFIG_CRYPTO_STATS
+	return &alg->stat;
+#else
+	return NULL;
+#endif
+}
+
 static int setkey_unaligned(struct crypto_aead *tfm, const u8 *key,
 			    unsigned int keylen)
 {
@@ -81,28 +90,62 @@ int crypto_aead_setauthsize(struct crypto_aead *tfm, unsigned int authsize)
 }
 EXPORT_SYMBOL_GPL(crypto_aead_setauthsize);
 
+static inline int crypto_aead_errstat(struct crypto_istat_aead *istat, int err)
+{
+	if (!IS_ENABLED(CONFIG_CRYPTO_STATS))
+		return err;
+
+	if (err && err != -EINPROGRESS && err != -EBUSY)
+		atomic64_inc(&istat->err_cnt);
+
+	return err;
+}
+
 int crypto_aead_encrypt(struct aead_request *req)
 {
 	struct crypto_aead *aead = crypto_aead_reqtfm(req);
+	struct aead_alg *alg = crypto_aead_alg(aead);
+	struct crypto_istat_aead *istat;
+	int ret;
+
+	istat = aead_get_stat(alg);
+
+	if (IS_ENABLED(CONFIG_CRYPTO_STATS)) {
+		atomic64_inc(&istat->encrypt_cnt);
+		atomic64_add(req->cryptlen, &istat->encrypt_tlen);
+	}
 
 	if (crypto_aead_get_flags(aead) & CRYPTO_TFM_NEED_KEY)
-		return -ENOKEY;
+		ret = -ENOKEY;
+	else
+		ret = alg->encrypt(req);
 
-	return crypto_aead_alg(aead)->encrypt(req);
+	return crypto_aead_errstat(istat, ret);
 }
 EXPORT_SYMBOL_GPL(crypto_aead_encrypt);
 
 int crypto_aead_decrypt(struct aead_request *req)
 {
 	struct crypto_aead *aead = crypto_aead_reqtfm(req);
+	struct aead_alg *alg = crypto_aead_alg(aead);
+	struct crypto_istat_aead *istat;
+	int ret;
 
-	if (crypto_aead_get_flags(aead) & CRYPTO_TFM_NEED_KEY)
-		return -ENOKEY;
+	istat = aead_get_stat(alg);
 
-	if (req->cryptlen < crypto_aead_authsize(aead))
-		return -EINVAL;
+	if (IS_ENABLED(CONFIG_CRYPTO_STATS)) {
+		atomic64_inc(&istat->encrypt_cnt);
+		atomic64_add(req->cryptlen, &istat->encrypt_tlen);
+	}
+
+	if (crypto_aead_get_flags(aead) & CRYPTO_TFM_NEED_KEY)
+		ret = -ENOKEY;
+	else if (req->cryptlen < crypto_aead_authsize(aead))
+		ret = -EINVAL;
+	else
+		ret = alg->decrypt(req);
 
-	return crypto_aead_alg(aead)->decrypt(req);
+	return crypto_aead_errstat(istat, ret);
 }
 EXPORT_SYMBOL_GPL(crypto_aead_decrypt);
 
@@ -172,6 +215,26 @@ static void crypto_aead_free_instance(struct crypto_instance *inst)
 	aead->free(aead);
 }
 
+static int __maybe_unused crypto_aead_report_stat(
+	struct sk_buff *skb, struct crypto_alg *alg)
+{
+	struct aead_alg *aead = container_of(alg, struct aead_alg, base);
+	struct crypto_istat_aead *istat = aead_get_stat(aead);
+	struct crypto_stat_aead raead;
+
+	memset(&raead, 0, sizeof(raead));
+
+	strscpy(raead.type, "aead", sizeof(raead.type));
+
+	raead.stat_encrypt_cnt = atomic64_read(&istat->encrypt_cnt);
+	raead.stat_encrypt_tlen = atomic64_read(&istat->encrypt_tlen);
+	raead.stat_decrypt_cnt = atomic64_read(&istat->decrypt_cnt);
+	raead.stat_decrypt_tlen = atomic64_read(&istat->decrypt_tlen);
+	raead.stat_err_cnt = atomic64_read(&istat->err_cnt);
+
+	return nla_put(skb, CRYPTOCFGA_STAT_AEAD, sizeof(raead), &raead);
+}
+
 static const struct crypto_type crypto_aead_type = {
 	.extsize = crypto_alg_extsize,
 	.init_tfm = crypto_aead_init_tfm,
@@ -182,6 +245,9 @@ static const struct crypto_type crypto_aead_type = {
 #if IS_ENABLED(CONFIG_CRYPTO_USER)
 	.report = crypto_aead_report,
 #endif
+#ifdef CONFIG_CRYPTO_STATS
+	.report_stat = crypto_aead_report_stat,
+#endif
 	.maskclear = ~CRYPTO_ALG_TYPE_MASK,
 	.maskset = CRYPTO_ALG_TYPE_MASK,
 	.type = CRYPTO_ALG_TYPE_AEAD,
@@ -211,6 +277,7 @@ EXPORT_SYMBOL_GPL(crypto_has_aead);
 
 static int aead_prepare_alg(struct aead_alg *alg)
 {
+	struct crypto_istat_aead *istat = aead_get_stat(alg);
 	struct crypto_alg *base = &alg->base;
 
 	if (max3(alg->maxauthsize, alg->ivsize, alg->chunksize) >
@@ -224,6 +291,9 @@ static int aead_prepare_alg(struct aead_alg *alg)
 	base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK;
 	base->cra_flags |= CRYPTO_ALG_TYPE_AEAD;
 
+	if (IS_ENABLED(CONFIG_CRYPTO_STATS))
+		memset(istat, 0, sizeof(*istat));
+
 	return 0;
 }
 
diff --git a/crypto/ahash.c b/crypto/ahash.c
index bcd9de009a91..0ac83f7f701d 100644
--- a/crypto/ahash.c
+++ b/crypto/ahash.c
@@ -27,6 +27,22 @@
 
 #define CRYPTO_ALG_TYPE_AHASH_MASK	0x0000000e
 
+static inline struct crypto_istat_hash *ahash_get_stat(struct ahash_alg *alg)
+{
+	return hash_get_stat(&alg->halg);
+}
+
+static inline int crypto_ahash_errstat(struct ahash_alg *alg, int err)
+{
+	if (!IS_ENABLED(CONFIG_CRYPTO_STATS))
+		return err;
+
+	if (err && err != -EINPROGRESS && err != -EBUSY)
+		atomic64_inc(&ahash_get_stat(alg)->err_cnt);
+
+	return err;
+}
+
 /*
  * For an ahash tfm that is using an shash algorithm (instead of an ahash
  * algorithm), this returns the underlying shash tfm.
@@ -328,47 +344,75 @@ static void ahash_restore_req(struct ahash_request *req, int err)
 int crypto_ahash_update(struct ahash_request *req)
 {
 	struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
+	struct ahash_alg *alg;
 
 	if (likely(tfm->using_shash))
 		return shash_ahash_update(req, ahash_request_ctx(req));
 
-	return crypto_ahash_alg(tfm)->update(req);
+	alg = crypto_ahash_alg(tfm);
+	if (IS_ENABLED(CONFIG_CRYPTO_STATS))
+		atomic64_add(req->nbytes, &ahash_get_stat(alg)->hash_tlen);
+	return crypto_ahash_errstat(alg, alg->update(req));
 }
 EXPORT_SYMBOL_GPL(crypto_ahash_update);
 
 int crypto_ahash_final(struct ahash_request *req)
 {
 	struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
+	struct ahash_alg *alg;
 
 	if (likely(tfm->using_shash))
 		return crypto_shash_final(ahash_request_ctx(req), req->result);
 
-	return crypto_ahash_alg(tfm)->final(req);
+	alg = crypto_ahash_alg(tfm);
+	if (IS_ENABLED(CONFIG_CRYPTO_STATS))
+		atomic64_inc(&ahash_get_stat(alg)->hash_cnt);
+	return crypto_ahash_errstat(alg, alg->final(req));
 }
 EXPORT_SYMBOL_GPL(crypto_ahash_final);
 
 int crypto_ahash_finup(struct ahash_request *req)
 {
 	struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
+	struct ahash_alg *alg;
 
 	if (likely(tfm->using_shash))
 		return shash_ahash_finup(req, ahash_request_ctx(req));
 
-	return crypto_ahash_alg(tfm)->finup(req);
+	alg = crypto_ahash_alg(tfm);
+	if (IS_ENABLED(CONFIG_CRYPTO_STATS)) {
+		struct crypto_istat_hash *istat = ahash_get_stat(alg);
+
+		atomic64_inc(&istat->hash_cnt);
+		atomic64_add(req->nbytes, &istat->hash_tlen);
+	}
+	return crypto_ahash_errstat(alg, alg->finup(req));
 }
 EXPORT_SYMBOL_GPL(crypto_ahash_finup);
 
 int crypto_ahash_digest(struct ahash_request *req)
 {
 	struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
+	struct ahash_alg *alg;
+	int err;
 
 	if (likely(tfm->using_shash))
 		return shash_ahash_digest(req, prepare_shash_desc(req, tfm));
 
+	alg = crypto_ahash_alg(tfm);
+	if (IS_ENABLED(CONFIG_CRYPTO_STATS)) {
+		struct crypto_istat_hash *istat = ahash_get_stat(alg);
+
+		atomic64_inc(&istat->hash_cnt);
+		atomic64_add(req->nbytes, &istat->hash_tlen);
+	}
+
 	if (crypto_ahash_get_flags(tfm) & CRYPTO_TFM_NEED_KEY)
-		return -ENOKEY;
+		err = -ENOKEY;
+	else
+		err = alg->digest(req);
 
-	return crypto_ahash_alg(tfm)->digest(req);
+	return crypto_ahash_errstat(alg, err);
 }
 EXPORT_SYMBOL_GPL(crypto_ahash_digest);
 
@@ -527,6 +571,12 @@ static void crypto_ahash_show(struct seq_file *m, struct crypto_alg *alg)
 		   __crypto_hash_alg_common(alg)->digestsize);
 }
 
+static int __maybe_unused crypto_ahash_report_stat(
+	struct sk_buff *skb, struct crypto_alg *alg)
+{
+	return crypto_hash_report_stat(skb, alg, "ahash");
+}
+
 static const struct crypto_type crypto_ahash_type = {
 	.extsize = crypto_ahash_extsize,
 	.init_tfm = crypto_ahash_init_tfm,
@@ -537,6 +587,9 @@ static const struct crypto_type crypto_ahash_type = {
 #if IS_ENABLED(CONFIG_CRYPTO_USER)
 	.report = crypto_ahash_report,
 #endif
+#ifdef CONFIG_CRYPTO_STATS
+	.report_stat = crypto_ahash_report_stat,
+#endif
 	.maskclear = ~CRYPTO_ALG_TYPE_MASK,
 	.maskset = CRYPTO_ALG_TYPE_AHASH_MASK,
 	.type = CRYPTO_ALG_TYPE_AHASH,
diff --git a/crypto/akcipher.c b/crypto/akcipher.c
index e0ff5f4dda6d..52813f0b19e4 100644
--- a/crypto/akcipher.c
+++ b/crypto/akcipher.c
@@ -70,6 +70,30 @@ static void crypto_akcipher_free_instance(struct crypto_instance *inst)
 	akcipher->free(akcipher);
 }
 
+static int __maybe_unused crypto_akcipher_report_stat(
+	struct sk_buff *skb, struct crypto_alg *alg)
+{
+	struct akcipher_alg *akcipher = __crypto_akcipher_alg(alg);
+	struct crypto_istat_akcipher *istat;
+	struct crypto_stat_akcipher rakcipher;
+
+	istat = akcipher_get_stat(akcipher);
+
+	memset(&rakcipher, 0, sizeof(rakcipher));
+
+	strscpy(rakcipher.type, "akcipher", sizeof(rakcipher.type));
+	rakcipher.stat_encrypt_cnt = atomic64_read(&istat->encrypt_cnt);
+	rakcipher.stat_encrypt_tlen = atomic64_read(&istat->encrypt_tlen);
+	rakcipher.stat_decrypt_cnt = atomic64_read(&istat->decrypt_cnt);
+	rakcipher.stat_decrypt_tlen = atomic64_read(&istat->decrypt_tlen);
+	rakcipher.stat_sign_cnt = atomic64_read(&istat->sign_cnt);
+	rakcipher.stat_verify_cnt = atomic64_read(&istat->verify_cnt);
+	rakcipher.stat_err_cnt = atomic64_read(&istat->err_cnt);
+
+	return nla_put(skb, CRYPTOCFGA_STAT_AKCIPHER,
+		       sizeof(rakcipher), &rakcipher);
+}
+
 static const struct crypto_type crypto_akcipher_type = {
 	.extsize = crypto_alg_extsize,
 	.init_tfm = crypto_akcipher_init_tfm,
@@ -80,6 +104,9 @@ static const struct crypto_type crypto_akcipher_type = {
 #if IS_ENABLED(CONFIG_CRYPTO_USER)
 	.report = crypto_akcipher_report,
 #endif
+#ifdef CONFIG_CRYPTO_STATS
+	.report_stat = crypto_akcipher_report_stat,
+#endif
 	.maskclear = ~CRYPTO_ALG_TYPE_MASK,
 	.maskset = CRYPTO_ALG_TYPE_AHASH_MASK,
 	.type = CRYPTO_ALG_TYPE_AKCIPHER,
@@ -104,11 +131,15 @@ EXPORT_SYMBOL_GPL(crypto_alloc_akcipher);
 
 static void akcipher_prepare_alg(struct akcipher_alg *alg)
 {
+	struct crypto_istat_akcipher *istat = akcipher_get_stat(alg);
 	struct crypto_alg *base = &alg->base;
 
 	base->cra_type = &crypto_akcipher_type;
 	base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK;
 	base->cra_flags |= CRYPTO_ALG_TYPE_AKCIPHER;
+
+	if (IS_ENABLED(CONFIG_CRYPTO_STATS))
+		memset(istat, 0, sizeof(*istat));
 }
 
 static int akcipher_default_op(struct akcipher_request *req)
diff --git a/crypto/compress.h b/crypto/compress.h
index 23ea43810810..19f65516d699 100644
--- a/crypto/compress.h
+++ b/crypto/compress.h
@@ -12,10 +12,15 @@
 #include "internal.h"
 
 struct acomp_req;
+struct comp_alg_common;
 struct sk_buff;
 
 int crypto_init_scomp_ops_async(struct crypto_tfm *tfm);
 struct acomp_req *crypto_acomp_scomp_alloc_ctx(struct acomp_req *req);
 void crypto_acomp_scomp_free_ctx(struct acomp_req *req);
 
+int crypto_acomp_report_stat(struct sk_buff *skb, struct crypto_alg *alg);
+
+void comp_prepare_alg(struct comp_alg_common *alg);
+
 #endif	/* _LOCAL_CRYPTO_COMPRESS_H */
diff --git a/crypto/crypto_user.c b/crypto/crypto_user_base.c
index 6c571834e86a..3fa20f12989f 100644
--- a/crypto/crypto_user.c
+++ b/crypto/crypto_user_base.c
@@ -18,6 +18,7 @@
 #include <crypto/internal/rng.h>
 #include <crypto/akcipher.h>
 #include <crypto/kpp.h>
+#include <crypto/internal/cryptouser.h>
 
 #include "internal.h"
 
@@ -32,7 +33,7 @@ struct crypto_dump_info {
 	u16 nlmsg_flags;
 };
 
-static struct crypto_alg *crypto_alg_match(struct crypto_user_alg *p, int exact)
+struct crypto_alg *crypto_alg_match(struct crypto_user_alg *p, int exact)
 {
 	struct crypto_alg *q, *alg = NULL;
 
@@ -386,13 +387,6 @@ static int crypto_del_rng(struct sk_buff *skb, struct nlmsghdr *nlh,
 	return crypto_del_default_rng();
 }
 
-static int crypto_reportstat(struct sk_buff *in_skb, struct nlmsghdr *in_nlh,
-			     struct nlattr **attrs)
-{
-	/* No longer supported */
-	return -ENOTSUPP;
-}
-
 #define MSGSIZE(type) sizeof(struct type)
 
 static const int crypto_msg_min[CRYPTO_NR_MSGTYPES] = {
diff --git a/crypto/crypto_user_stat.c b/crypto/crypto_user_stat.c
new file mode 100644
index 000000000000..d4f3d39b5137
--- /dev/null
+++ b/crypto/crypto_user_stat.c
@@ -0,0 +1,176 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Crypto user configuration API.
+ *
+ * Copyright (C) 2017-2018 Corentin Labbe <clabbe@baylibre.com>
+ *
+ */
+
+#include <crypto/algapi.h>
+#include <crypto/internal/cryptouser.h>
+#include <linux/errno.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/string.h>
+#include <net/netlink.h>
+#include <net/sock.h>
+
+#define null_terminated(x)	(strnlen(x, sizeof(x)) < sizeof(x))
+
+struct crypto_dump_info {
+	struct sk_buff *in_skb;
+	struct sk_buff *out_skb;
+	u32 nlmsg_seq;
+	u16 nlmsg_flags;
+};
+
+static int crypto_report_cipher(struct sk_buff *skb, struct crypto_alg *alg)
+{
+	struct crypto_stat_cipher rcipher;
+
+	memset(&rcipher, 0, sizeof(rcipher));
+
+	strscpy(rcipher.type, "cipher", sizeof(rcipher.type));
+
+	return nla_put(skb, CRYPTOCFGA_STAT_CIPHER, sizeof(rcipher), &rcipher);
+}
+
+static int crypto_report_comp(struct sk_buff *skb, struct crypto_alg *alg)
+{
+	struct crypto_stat_compress rcomp;
+
+	memset(&rcomp, 0, sizeof(rcomp));
+
+	strscpy(rcomp.type, "compression", sizeof(rcomp.type));
+
+	return nla_put(skb, CRYPTOCFGA_STAT_COMPRESS, sizeof(rcomp), &rcomp);
+}
+
+static int crypto_reportstat_one(struct crypto_alg *alg,
+				 struct crypto_user_alg *ualg,
+				 struct sk_buff *skb)
+{
+	memset(ualg, 0, sizeof(*ualg));
+
+	strscpy(ualg->cru_name, alg->cra_name, sizeof(ualg->cru_name));
+	strscpy(ualg->cru_driver_name, alg->cra_driver_name,
+		sizeof(ualg->cru_driver_name));
+	strscpy(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_larval rl;
+
+		memset(&rl, 0, sizeof(rl));
+		strscpy(rl.type, "larval", sizeof(rl.type));
+		if (nla_put(skb, CRYPTOCFGA_STAT_LARVAL, sizeof(rl), &rl))
+			goto nla_put_failure;
+		goto out;
+	}
+
+	if (alg->cra_type && alg->cra_type->report_stat) {
+		if (alg->cra_type->report_stat(skb, alg))
+			goto nla_put_failure;
+		goto out;
+	}
+
+	switch (alg->cra_flags & (CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_LARVAL)) {
+	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;
+	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 net *net = sock_net(in_skb->sk);
+	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) {
+		kfree_skb(skb);
+		return err;
+	}
+
+	return nlmsg_unicast(net->crypto_nlsk, skb, NETLINK_CB(in_skb).portid);
+}
+
+MODULE_LICENSE("GPL");
diff --git a/crypto/hash.h b/crypto/hash.h
index cf9aee07f77d..93f6ba0df263 100644
--- a/crypto/hash.h
+++ b/crypto/hash.h
@@ -8,9 +8,39 @@
 #define _LOCAL_CRYPTO_HASH_H
 
 #include <crypto/internal/hash.h>
+#include <linux/cryptouser.h>
 
 #include "internal.h"
 
+static inline struct crypto_istat_hash *hash_get_stat(
+	struct hash_alg_common *alg)
+{
+#ifdef CONFIG_CRYPTO_STATS
+	return &alg->stat;
+#else
+	return NULL;
+#endif
+}
+
+static inline int crypto_hash_report_stat(struct sk_buff *skb,
+					  struct crypto_alg *alg,
+					  const char *type)
+{
+	struct hash_alg_common *halg = __crypto_hash_alg_common(alg);
+	struct crypto_istat_hash *istat = hash_get_stat(halg);
+	struct crypto_stat_hash rhash;
+
+	memset(&rhash, 0, sizeof(rhash));
+
+	strscpy(rhash.type, type, sizeof(rhash.type));
+
+	rhash.stat_hash_cnt = atomic64_read(&istat->hash_cnt);
+	rhash.stat_hash_tlen = atomic64_read(&istat->hash_tlen);
+	rhash.stat_err_cnt = atomic64_read(&istat->err_cnt);
+
+	return nla_put(skb, CRYPTOCFGA_STAT_HASH, sizeof(rhash), &rhash);
+}
+
 extern const struct crypto_type crypto_shash_type;
 
 int hash_prepare_alg(struct hash_alg_common *alg);
diff --git a/crypto/kpp.c b/crypto/kpp.c
index ecc63a1a948d..33d44e59387f 100644
--- a/crypto/kpp.c
+++ b/crypto/kpp.c
@@ -66,6 +66,29 @@ static void crypto_kpp_free_instance(struct crypto_instance *inst)
 	kpp->free(kpp);
 }
 
+static int __maybe_unused crypto_kpp_report_stat(
+	struct sk_buff *skb, struct crypto_alg *alg)
+{
+	struct kpp_alg *kpp = __crypto_kpp_alg(alg);
+	struct crypto_istat_kpp *istat;
+	struct crypto_stat_kpp rkpp;
+
+	istat = kpp_get_stat(kpp);
+
+	memset(&rkpp, 0, sizeof(rkpp));
+
+	strscpy(rkpp.type, "kpp", sizeof(rkpp.type));
+
+	rkpp.stat_setsecret_cnt = atomic64_read(&istat->setsecret_cnt);
+	rkpp.stat_generate_public_key_cnt =
+		atomic64_read(&istat->generate_public_key_cnt);
+	rkpp.stat_compute_shared_secret_cnt =
+		atomic64_read(&istat->compute_shared_secret_cnt);
+	rkpp.stat_err_cnt = atomic64_read(&istat->err_cnt);
+
+	return nla_put(skb, CRYPTOCFGA_STAT_KPP, sizeof(rkpp), &rkpp);
+}
+
 static const struct crypto_type crypto_kpp_type = {
 	.extsize = crypto_alg_extsize,
 	.init_tfm = crypto_kpp_init_tfm,
@@ -76,6 +99,9 @@ static const struct crypto_type crypto_kpp_type = {
 #if IS_ENABLED(CONFIG_CRYPTO_USER)
 	.report = crypto_kpp_report,
 #endif
+#ifdef CONFIG_CRYPTO_STATS
+	.report_stat = crypto_kpp_report_stat,
+#endif
 	.maskclear = ~CRYPTO_ALG_TYPE_MASK,
 	.maskset = CRYPTO_ALG_TYPE_MASK,
 	.type = CRYPTO_ALG_TYPE_KPP,
@@ -105,11 +131,15 @@ EXPORT_SYMBOL_GPL(crypto_has_kpp);
 
 static void kpp_prepare_alg(struct kpp_alg *alg)
 {
+	struct crypto_istat_kpp *istat = kpp_get_stat(alg);
 	struct crypto_alg *base = &alg->base;
 
 	base->cra_type = &crypto_kpp_type;
 	base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK;
 	base->cra_flags |= CRYPTO_ALG_TYPE_KPP;
+
+	if (IS_ENABLED(CONFIG_CRYPTO_STATS))
+		memset(istat, 0, sizeof(*istat));
 }
 
 int crypto_register_kpp(struct kpp_alg *alg)