diff mbox

[1/24] crypto: api - Add crypto_grab_spawn primitive

Message ID E1YrkJH-00017q-Vo@gondolin.me.apana.org.au (mailing list archive)
State Accepted
Delegated to: Herbert Xu
Headers show

Commit Message

Herbert Xu May 11, 2015, 9:47 a.m. UTC 
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>
---

 crypto/algapi.c         |   16 ++++++++++++++++
 include/crypto/algapi.h |    2 ++
 2 files changed, 18 insertions(+)

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diff mbox

Patch

diff --git a/crypto/algapi.c b/crypto/algapi.c
index 3103e6a..abf100c 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 0ecb768..a949bf7 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,