crypto: api - Rebirth of crypto_alloc_tfm
This patch reintroduces a completely revamped crypto_alloc_tfm.
The biggest change is that we now take two crypto_type objects
when allocating a tfm, a frontend and a backend. In fact this
simply formalises what we've been doing behind the API's back.
For example, as it stands crypto_alloc_ahash may use an
actual ahash algorithm or a crypto_hash algorithm. Putting
this in the API allows us to do this much more cleanly.
The existing types will be converted across gradually.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
diff --git a/include/crypto/algapi.h b/include/crypto/algapi.h
index 5fb6d86..986db68 100644
--- a/include/crypto/algapi.h
+++ b/include/crypto/algapi.h
@@ -22,8 +22,18 @@
struct crypto_type {
unsigned int (*ctxsize)(struct crypto_alg *alg, u32 type, u32 mask);
+ unsigned int (*extsize)(struct crypto_alg *alg,
+ const struct crypto_type *frontend);
int (*init)(struct crypto_tfm *tfm, u32 type, u32 mask);
+ int (*init_tfm)(struct crypto_tfm *tfm,
+ const struct crypto_type *frontend);
void (*show)(struct seq_file *m, struct crypto_alg *alg);
+ struct crypto_alg *(*lookup)(const char *name, u32 type, u32 mask);
+
+ unsigned int type;
+ unsigned int maskclear;
+ unsigned int maskset;
+ unsigned int tfmsize;
};
struct crypto_instance {