| Message ID | 20180826024006.13800-1-martin.petersen@oracle.com (mailing list archive) |
|---|---|
| State | Not Applicable |
| Headers | show |
| Series | [1/4] crypto: Introduce notifier for new crypto algorithms | expand |
On Sat, Aug 25, 2018 at 10:40:03PM -0400, Martin K. Petersen wrote: > > diff --git a/crypto/algapi.c b/crypto/algapi.c > index c0755cf4f53f..87abad3cc322 100644 > --- a/crypto/algapi.c > +++ b/crypto/algapi.c > @@ -361,15 +361,12 @@ static void crypto_wait_for_test(struct crypto_larval *larval) > err = crypto_probing_notify(CRYPTO_MSG_ALG_REGISTER, larval->adult); > if (err != NOTIFY_STOP) { > if (WARN_ON(err != NOTIFY_DONE)) > - goto out; > + return; > crypto_alg_tested(larval->alg.cra_driver_name, 0); > } > > err = wait_for_completion_killable(&larval->completion); > WARN_ON(err); > - > -out: > - crypto_larval_kill(&larval->alg); > } > > int crypto_register_alg(struct crypto_alg *alg) > @@ -390,6 +387,8 @@ int crypto_register_alg(struct crypto_alg *alg) > return PTR_ERR(larval); > > crypto_wait_for_test(larval); > + crypto_probing_notify(CRYPTO_MSG_ALG_LOADED, larval); > + crypto_larval_kill(&larval->alg); I see that you have moved the larval_kill call into the caller. This is a problem because there are two callers to wait_for_test. So it's probably best to leave it in wait_for_test and add the notify there. Thanks,
Herbert, Sorry about the delay. Been on the road with surprisingly spotty internet. I addressed your two comments in the patch series that will follow.
diff --git a/crypto/algapi.c b/crypto/algapi.c index c0755cf4f53f..87abad3cc322 100644 --- a/crypto/algapi.c +++ b/crypto/algapi.c @@ -361,15 +361,12 @@ static void crypto_wait_for_test(struct crypto_larval *larval) err = crypto_probing_notify(CRYPTO_MSG_ALG_REGISTER, larval->adult); if (err != NOTIFY_STOP) { if (WARN_ON(err != NOTIFY_DONE)) - goto out; + return; crypto_alg_tested(larval->alg.cra_driver_name, 0); } err = wait_for_completion_killable(&larval->completion); WARN_ON(err); - -out: - crypto_larval_kill(&larval->alg); } int crypto_register_alg(struct crypto_alg *alg) @@ -390,6 +387,8 @@ int crypto_register_alg(struct crypto_alg *alg) return PTR_ERR(larval); crypto_wait_for_test(larval); + crypto_probing_notify(CRYPTO_MSG_ALG_LOADED, larval); + crypto_larval_kill(&larval->alg); return 0; } EXPORT_SYMBOL_GPL(crypto_register_alg); diff --git a/crypto/algboss.c b/crypto/algboss.c index 5e6df2a087fa..527b44d0af21 100644 --- a/crypto/algboss.c +++ b/crypto/algboss.c @@ -274,6 +274,8 @@ static int cryptomgr_notify(struct notifier_block *this, unsigned long msg, return cryptomgr_schedule_probe(data); case CRYPTO_MSG_ALG_REGISTER: return cryptomgr_schedule_test(data); + case CRYPTO_MSG_ALG_LOADED: + break; } return NOTIFY_DONE; diff --git a/crypto/internal.h b/crypto/internal.h index 9a3f39939fba..ef769b5e8ad3 100644 --- a/crypto/internal.h +++ b/crypto/internal.h @@ -26,12 +26,6 @@ #include <linux/rwsem.h> #include <linux/slab.h> -/* Crypto notification events. */ -enum { - CRYPTO_MSG_ALG_REQUEST, - CRYPTO_MSG_ALG_REGISTER, -}; - struct crypto_instance; struct crypto_template; @@ -90,8 +84,6 @@ struct crypto_alg *crypto_find_alg(const char *alg_name, void *crypto_alloc_tfm(const char *alg_name, const struct crypto_type *frontend, u32 type, u32 mask); -int crypto_register_notifier(struct notifier_block *nb); -int crypto_unregister_notifier(struct notifier_block *nb); int crypto_probing_notify(unsigned long val, void *v); unsigned int crypto_alg_extsize(struct crypto_alg *alg); diff --git a/include/crypto/algapi.h b/include/crypto/algapi.h index bd5e8ccf1687..807501a4a754 100644 --- a/include/crypto/algapi.h +++ b/include/crypto/algapi.h @@ -425,4 +425,14 @@ static inline void crypto_yield(u32 flags) #endif } +int crypto_register_notifier(struct notifier_block *nb); +int crypto_unregister_notifier(struct notifier_block *nb); + +/* Crypto notification events. */ +enum { + CRYPTO_MSG_ALG_REQUEST, + CRYPTO_MSG_ALG_REGISTER, + CRYPTO_MSG_ALG_LOADED, +}; + #endif /* _CRYPTO_ALGAPI_H */
Introduce a facility that can be used to receive a notification callback when a new algorithm becomes available. This can be used by existing crypto registrations to trigger a switch from a software-only algorithm to a hardware-accelerated version. A new CRYPTO_MSG_ALG_LOADED state is introduced to the existing crypto notification chain, and the register/unregister functions are exported so they can be called by subsystems outside of crypto. Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> Suggested-by: Herbert Xu <herbert@gondor.apana.org.au> --- crypto/algapi.c | 7 +++---- crypto/algboss.c | 2 ++ crypto/internal.h | 8 -------- include/crypto/algapi.h | 10 ++++++++++ 4 files changed, 15 insertions(+), 12 deletions(-)