crypto: user - Implement a generic crypto statistics

This patch implement a generic way to get statistics about all crypto
usages.

Signed-off-by: Corentin Labbe <clabbe@baylibre.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

1 files changed, 72 insertions, 4 deletions

diff --git a/include/crypto/akcipher.h b/include/crypto/akcipher.h
index b5e11de4d497..afac71119396 100644
--- a/include/crypto/akcipher.h
+++ b/include/crypto/akcipher.h
@@ -271,6 +271,62 @@ static inline unsigned int crypto_akcipher_maxsize(struct crypto_akcipher *tfm)
 	return alg->max_size(tfm);
 }
 
+static inline void crypto_stat_akcipher_encrypt(struct akcipher_request *req,
+						int ret)
+{
+#ifdef CONFIG_CRYPTO_STATS
+	struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req);
+
+	if (ret && ret != -EINPROGRESS && ret != -EBUSY) {
+		atomic_inc(&tfm->base.__crt_alg->akcipher_err_cnt);
+	} else {
+		atomic_inc(&tfm->base.__crt_alg->encrypt_cnt);
+		atomic64_add(req->src_len, &tfm->base.__crt_alg->encrypt_tlen);
+	}
+#endif
+}
+
+static inline void crypto_stat_akcipher_decrypt(struct akcipher_request *req,
+						int ret)
+{
+#ifdef CONFIG_CRYPTO_STATS
+	struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req);
+
+	if (ret && ret != -EINPROGRESS && ret != -EBUSY) {
+		atomic_inc(&tfm->base.__crt_alg->akcipher_err_cnt);
+	} else {
+		atomic_inc(&tfm->base.__crt_alg->decrypt_cnt);
+		atomic64_add(req->src_len, &tfm->base.__crt_alg->decrypt_tlen);
+	}
+#endif
+}
+
+static inline void crypto_stat_akcipher_sign(struct akcipher_request *req,
+					     int ret)
+{
+#ifdef CONFIG_CRYPTO_STATS
+	struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req);
+
+	if (ret && ret != -EINPROGRESS && ret != -EBUSY)
+		atomic_inc(&tfm->base.__crt_alg->akcipher_err_cnt);
+	else
+		atomic_inc(&tfm->base.__crt_alg->sign_cnt);
+#endif
+}
+
+static inline void crypto_stat_akcipher_verify(struct akcipher_request *req,
+					       int ret)
+{
+#ifdef CONFIG_CRYPTO_STATS
+	struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req);
+
+	if (ret && ret != -EINPROGRESS && ret != -EBUSY)
+		atomic_inc(&tfm->base.__crt_alg->akcipher_err_cnt);
+	else
+		atomic_inc(&tfm->base.__crt_alg->verify_cnt);
+#endif
+}
+
 /**
  * crypto_akcipher_encrypt() - Invoke public key encrypt operation
  *
@@ -285,8 +341,11 @@ static inline int crypto_akcipher_encrypt(struct akcipher_request *req)
 {
 	struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req);
 	struct akcipher_alg *alg = crypto_akcipher_alg(tfm);
+	int ret;
 
-	return alg->encrypt(req);
+	ret = alg->encrypt(req);
+	crypto_stat_akcipher_encrypt(req, ret);
+	return ret;
 }
 
 /**
@@ -303,8 +362,11 @@ static inline int crypto_akcipher_decrypt(struct akcipher_request *req)
 {
 	struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req);
 	struct akcipher_alg *alg = crypto_akcipher_alg(tfm);
+	int ret;
 
-	return alg->decrypt(req);
+	ret = alg->decrypt(req);
+	crypto_stat_akcipher_decrypt(req, ret);
+	return ret;
 }
 
 /**
@@ -321,8 +383,11 @@ static inline int crypto_akcipher_sign(struct akcipher_request *req)
 {
 	struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req);
 	struct akcipher_alg *alg = crypto_akcipher_alg(tfm);
+	int ret;
 
-	return alg->sign(req);
+	ret = alg->sign(req);
+	crypto_stat_akcipher_sign(req, ret);
+	return ret;
 }
 
 /**
@@ -339,8 +404,11 @@ static inline int crypto_akcipher_verify(struct akcipher_request *req)
 {
 	struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req);
 	struct akcipher_alg *alg = crypto_akcipher_alg(tfm);
+	int ret;
 
-	return alg->verify(req);
+	ret = alg->verify(req);
+	crypto_stat_akcipher_verify(req, ret);
+	return ret;
 }
 
 /**