From d6ef2f198d4c9d95b77ee4918b97fc8a53c8a7b7 Mon Sep 17 00:00:00 2001 From: Herbert Xu Date: Mon, 11 May 2015 17:47:39 +0800 Subject: [PATCH] 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 --- crypto/algapi.c | 16 ++++++++++++++++ include/crypto/algapi.h | 2 ++ 2 files changed, 18 insertions(+) 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, -- 2.39.5