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Commit d6ef2f19 authored by Herbert Xu's avatar Herbert Xu
Browse files

crypto: api - Add crypto_grab_spawn primitive 



This patch adds a new primitive crypto_grab_spawn which is meant
to replace crypto_init_spawn and crypto_init_spawn2.  Under the
new scheme the user no longer has to worry about reference counting
the alg object before it is subsumed by the spawn.

It is pretty much an exact copy of crypto_grab_aead.

Prior to calling this function spawn->frontend and spawn->inst
must have been set.

Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent 6499e8cf

crypto/algapi.c

+16 −0
Original line number Original line Diff line number Diff line
@@ -612,6 +612,22 @@ int crypto_init_spawn2(struct crypto_spawn *spawn, struct crypto_alg *alg, 
}

}

EXPORT_SYMBOL_GPL(crypto_init_spawn2);

EXPORT_SYMBOL_GPL(crypto_init_spawn2);





int crypto_grab_spawn(struct crypto_spawn *spawn, const char *name,

		      u32 type, u32 mask)

{

	struct crypto_alg *alg;

	int err;



	alg = crypto_find_alg(name, spawn->frontend, type, mask);

	if (IS_ERR(alg))

		return PTR_ERR(alg);



	err = crypto_init_spawn(spawn, alg, spawn->inst, mask);

	crypto_mod_put(alg);

	return err;

}

EXPORT_SYMBOL_GPL(crypto_grab_spawn);



void crypto_drop_spawn(struct crypto_spawn *spawn)

void crypto_drop_spawn(struct crypto_spawn *spawn)

{

{

	if (!spawn->alg)

	if (!spawn->alg)

include/crypto/algapi.h

+2 −0
Original line number Original line Diff line number Diff line
@@ -144,6 +144,8 @@ int crypto_init_spawn(struct crypto_spawn *spawn, struct crypto_alg *alg, 
int crypto_init_spawn2(struct crypto_spawn *spawn, struct crypto_alg *alg,

int crypto_init_spawn2(struct crypto_spawn *spawn, struct crypto_alg *alg,

		       struct crypto_instance *inst,

		       struct crypto_instance *inst,

		       const struct crypto_type *frontend);

		       const struct crypto_type *frontend);

int crypto_grab_spawn(struct crypto_spawn *spawn, const char *name,

		      u32 type, u32 mask);





void crypto_drop_spawn(struct crypto_spawn *spawn);

void crypto_drop_spawn(struct crypto_spawn *spawn);

struct crypto_tfm *crypto_spawn_tfm(struct crypto_spawn *spawn, u32 type,

struct crypto_tfm *crypto_spawn_tfm(struct crypto_spawn *spawn, u32 type,