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authorHerbert Xu <herbert@gondor.apana.org.au>2015-05-11 17:47:39 +0800
committerHerbert Xu <herbert@gondor.apana.org.au>2015-05-13 10:31:25 +0800
commitd6ef2f198d4c9d95b77ee4918b97fc8a53c8a7b7 (patch)
tree4926330410a3ab29a0e2802120d4be77d7175b9f
parent6499e8cfaa8f5d041b20af24d8409dec9f3ac3d0 (diff)
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: Herbert Xu <herbert@gondor.apana.org.au>
-rw-r--r--crypto/algapi.c16
-rw-r--r--include/crypto/algapi.h2
2 files changed, 18 insertions, 0 deletions
diff --git a/crypto/algapi.c b/crypto/algapi.c
index 3103e6a1282e..abf100c054e0 100644
--- a/crypto/algapi.c
+++ b/crypto/algapi.c
@@ -612,6 +612,22 @@ out:
}
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)
{
if (!spawn->alg)
diff --git a/include/crypto/algapi.h b/include/crypto/algapi.h
index 0ecb7688af71..a949bf70983b 100644
--- a/include/crypto/algapi.h
+++ b/include/crypto/algapi.h
@@ -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,
struct crypto_instance *inst,
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);
struct crypto_tfm *crypto_spawn_tfm(struct crypto_spawn *spawn, u32 type,