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crypto: user - Implement a generic crypto statistics

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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>
This commit is contained in:
Corentin Labbe 2018-09-19 10:10:54 +00:00 • committed by Herbert Xu
parent a9cbfe4c78
commit cac5818c25
17 changed files with 970 additions and 35 deletions
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110
include/linux/crypto.h
View file

@ -454,6 +454,33 @@ struct compress_alg {
* @cra_refcnt: internally used
* @cra_destroy: internally used
*
* All following statistics are for this crypto_alg
* @encrypt_cnt: number of encrypt requests
* @decrypt_cnt: number of decrypt requests
* @compress_cnt: number of compress requests
* @decompress_cnt: number of decompress requests
* @generate_cnt: number of RNG generate requests
* @seed_cnt: number of times the rng was seeded
* @hash_cnt: number of hash requests
* @sign_cnt: number of sign requests
* @setsecret_cnt: number of setsecrey operation
* @generate_public_key_cnt: number of generate_public_key operation
* @verify_cnt: number of verify operation
* @compute_shared_secret_cnt: number of compute_shared_secret operation
* @encrypt_tlen: total data size handled by encrypt requests
* @decrypt_tlen: total data size handled by decrypt requests
* @compress_tlen: total data size handled by compress requests
* @decompress_tlen: total data size handled by decompress requests
* @generate_tlen: total data size of generated data by the RNG
* @hash_tlen: total data size hashed
* @akcipher_err_cnt: number of error for akcipher requests
* @cipher_err_cnt: number of error for akcipher requests
* @compress_err_cnt: number of error for akcipher requests
* @aead_err_cnt: number of error for akcipher requests
* @hash_err_cnt: number of error for akcipher requests
* @rng_err_cnt: number of error for akcipher requests
* @kpp_err_cnt: number of error for akcipher requests
*
* The struct crypto_alg describes a generic Crypto API algorithm and is common
* for all of the transformations. Any variable not documented here shall not
* be used by a cipher implementation as it is internal to the Crypto API.
@ -487,6 +514,45 @@ struct crypto_alg {
void (*cra_destroy)(struct crypto_alg *alg);
struct module *cra_module;
union {
atomic_t encrypt_cnt;
atomic_t compress_cnt;
atomic_t generate_cnt;
atomic_t hash_cnt;
atomic_t setsecret_cnt;
};
union {
atomic64_t encrypt_tlen;
atomic64_t compress_tlen;
atomic64_t generate_tlen;
atomic64_t hash_tlen;
};
union {
atomic_t akcipher_err_cnt;
atomic_t cipher_err_cnt;
atomic_t compress_err_cnt;
atomic_t aead_err_cnt;
atomic_t hash_err_cnt;
atomic_t rng_err_cnt;
atomic_t kpp_err_cnt;
};
union {
atomic_t decrypt_cnt;
atomic_t decompress_cnt;
atomic_t seed_cnt;
atomic_t generate_public_key_cnt;
};
union {
atomic64_t decrypt_tlen;
atomic64_t decompress_tlen;
};
union {
atomic_t verify_cnt;
atomic_t compute_shared_secret_cnt;
};
atomic_t sign_cnt;
} CRYPTO_MINALIGN_ATTR;
/*
@ -907,6 +973,38 @@ static inline struct crypto_ablkcipher *crypto_ablkcipher_reqtfm(
return __crypto_ablkcipher_cast(req->base.tfm);
}
static inline void crypto_stat_ablkcipher_encrypt(struct ablkcipher_request *req,
int ret)
{
#ifdef CONFIG_CRYPTO_STATS
struct ablkcipher_tfm *crt =
crypto_ablkcipher_crt(crypto_ablkcipher_reqtfm(req));
if (ret && ret != -EINPROGRESS && ret != -EBUSY) {
atomic_inc(&crt->base->base.__crt_alg->cipher_err_cnt);
} else {
atomic_inc(&crt->base->base.__crt_alg->encrypt_cnt);
atomic64_add(req->nbytes, &crt->base->base.__crt_alg->encrypt_tlen);
}
#endif
}
static inline void crypto_stat_ablkcipher_decrypt(struct ablkcipher_request *req,
int ret)
{
#ifdef CONFIG_CRYPTO_STATS
struct ablkcipher_tfm *crt =
crypto_ablkcipher_crt(crypto_ablkcipher_reqtfm(req));
if (ret && ret != -EINPROGRESS && ret != -EBUSY) {
atomic_inc(&crt->base->base.__crt_alg->cipher_err_cnt);
} else {
atomic_inc(&crt->base->base.__crt_alg->decrypt_cnt);
atomic64_add(req->nbytes, &crt->base->base.__crt_alg->decrypt_tlen);
}
#endif
}
/**
* crypto_ablkcipher_encrypt() - encrypt plaintext
* @req: reference to the ablkcipher_request handle that holds all information
@ -922,7 +1020,11 @@ static inline int crypto_ablkcipher_encrypt(struct ablkcipher_request *req)
{
struct ablkcipher_tfm *crt =
crypto_ablkcipher_crt(crypto_ablkcipher_reqtfm(req));
return crt->encrypt(req);
int ret;
ret = crt->encrypt(req);
crypto_stat_ablkcipher_encrypt(req, ret);
return ret;
}
/**
@ -940,7 +1042,11 @@ static inline int crypto_ablkcipher_decrypt(struct ablkcipher_request *req)
{
struct ablkcipher_tfm *crt =
crypto_ablkcipher_crt(crypto_ablkcipher_reqtfm(req));
return crt->decrypt(req);
int ret;
ret = crt->decrypt(req);
crypto_stat_ablkcipher_decrypt(req, ret);
return ret;
}
/**