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| author | Corentin Labbe <clabbe@baylibre.com> | 2018-09-19 10:10:54 +0000 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2018-09-28 12:46:25 +0800 |
| commit | cac5818c25d0423bda73e2b6997404ed0a7ed9e3 (patch) | |
| tree | 3a443fa0e9a8e96799e2802552cd1f6435213569 /include/crypto/rng.h | |
| parent | a9cbfe4c784436368790f0c59674f99ba97ae21e (diff) | |
| download | lwn-cac5818c25d0423bda73e2b6997404ed0a7ed9e3.tar.gz lwn-cac5818c25d0423bda73e2b6997404ed0a7ed9e3.zip | |
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>
Diffstat (limited to 'include/crypto/rng.h')
| -rw-r--r-- | include/crypto/rng.h | 29 |
1 files changed, 28 insertions, 1 deletions
diff --git a/include/crypto/rng.h b/include/crypto/rng.h index b95ede354a66..6d258f5b68f1 100644 --- a/include/crypto/rng.h +++ b/include/crypto/rng.h @@ -122,6 +122,29 @@ static inline void crypto_free_rng(struct crypto_rng *tfm) crypto_destroy_tfm(tfm, crypto_rng_tfm(tfm)); } +static inline void crypto_stat_rng_seed(struct crypto_rng *tfm, int ret) +{ +#ifdef CONFIG_CRYPTO_STATS + if (ret && ret != -EINPROGRESS && ret != -EBUSY) + atomic_inc(&tfm->base.__crt_alg->rng_err_cnt); + else + atomic_inc(&tfm->base.__crt_alg->seed_cnt); +#endif +} + +static inline void crypto_stat_rng_generate(struct crypto_rng *tfm, + unsigned int dlen, int ret) +{ +#ifdef CONFIG_CRYPTO_STATS + if (ret && ret != -EINPROGRESS && ret != -EBUSY) { + atomic_inc(&tfm->base.__crt_alg->rng_err_cnt); + } else { + atomic_inc(&tfm->base.__crt_alg->generate_cnt); + atomic64_add(dlen, &tfm->base.__crt_alg->generate_tlen); + } +#endif +} + /** * crypto_rng_generate() - get random number * @tfm: cipher handle @@ -140,7 +163,11 @@ static inline int crypto_rng_generate(struct crypto_rng *tfm, const u8 *src, unsigned int slen, u8 *dst, unsigned int dlen) { - return crypto_rng_alg(tfm)->generate(tfm, src, slen, dst, dlen); + int ret; + + ret = crypto_rng_alg(tfm)->generate(tfm, src, slen, dst, dlen); + crypto_stat_rng_generate(tfm, dlen, ret); + return ret; } /** |