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crypto: api - Introduce notifier for new crypto algorithms

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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 <[email protected]>
Suggested-by: Herbert Xu <[email protected]>
Signed-off-by: Martin K. Petersen <[email protected]>
Signed-off-by: Herbert Xu <[email protected]>
This commit is contained in:
Martin K. Petersen 2018-08-30 11:00:14 -04:00 • committed by Herbert Xu
commit dd8b083f9a
4 changed files with 14 additions and 8 deletions
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8
crypto/internal.h
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@ -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);