commit 2e306ee016fd4750289e65c3b1856db569f1f3f2
author Herbert Xu <herbert@gondor.apana.org.au> Sun Dec 17 10:05:58 2006 +1100
committer Herbert Xu <herbert@gondor.apana.org.au> Wed Feb 07 09:21:01 2007 +1100
tree 53ace6081967c640f052d53397250657af855c25
parent f1ddcaf3393b7a3871809b97fae90fac841a1f39

[CRYPTO] api: Add type-safe spawns

This patch allows spawns of specific types (e.g., cipher) to be allocated.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

crypto/algapi.c

diff --git a/crypto/algapi.c b/crypto/algapi.c
index 69eb504..0f1abca 100644
--- a/crypto/algapi.c
+++ b/crypto/algapi.c
@@ -377,7 +377,8 @@
 }
 EXPORT_SYMBOL_GPL(crypto_drop_spawn);
 
-struct crypto_tfm *crypto_spawn_tfm(struct crypto_spawn *spawn)
+struct crypto_tfm *crypto_spawn_tfm(struct crypto_spawn *spawn, u32 type,
+				    u32 mask)
 {
 	struct crypto_alg *alg;
 	struct crypto_alg *alg2;
@@ -396,11 +397,19 @@
 		return ERR_PTR(-EAGAIN);
 	}
 
+	tfm = ERR_PTR(-EINVAL);
+	if (unlikely((alg->cra_flags ^ type) & mask))
+		goto out_put_alg;
+
 	tfm = __crypto_alloc_tfm(alg);
 	if (IS_ERR(tfm))
-		crypto_mod_put(alg);
+		goto out_put_alg;
 
 	return tfm;
+
+out_put_alg:
+	crypto_mod_put(alg);
+	return tfm;
 }
 EXPORT_SYMBOL_GPL(crypto_spawn_tfm);