[CRYPTO] api: Added crypto_type support

This patch adds the crypto_type structure which will be used for all new
crypto algorithm types, beginning with block ciphers.

The primary purpose of this abstraction is to allow different crypto_type
objects for crypto algorithms of the same type, in particular, there will
be a different crypto_type objects for asynchronous algorithms.

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

2 files changed, 11 insertions, 0 deletions

diff --git a/include/crypto/algapi.h b/include/crypto/algapi.h
index 1a598f829417..c533c0a291af 100644
--- a/include/crypto/algapi.h
+++ b/include/crypto/algapi.h
@@ -15,6 +15,14 @@
 #include <linux/crypto.h>
 
 struct module;
+struct seq_file;
+
+struct crypto_type {
+        unsigned int (*ctxsize)(struct crypto_alg *alg);
+        int (*init)(struct crypto_tfm *tfm);
+        void (*exit)(struct crypto_tfm *tfm);
+        void (*show)(struct seq_file *m, struct crypto_alg *alg);
+};
 
 struct crypto_instance {
         struct crypto_alg alg;
diff --git a/include/linux/crypto.h b/include/linux/crypto.h
index 6847ab0ea30e..8e9c407b00d2 100644
--- a/include/linux/crypto.h
+++ b/include/linux/crypto.h
@@ -90,6 +90,7 @@
 
 struct scatterlist;
 struct crypto_tfm;
+struct crypto_type;
 
 struct cipher_desc {
         struct crypto_tfm *tfm;
@@ -161,6 +162,8 @@ struct crypto_alg {
         char cra_name[CRYPTO_MAX_ALG_NAME];
         char cra_driver_name[CRYPTO_MAX_ALG_NAME];
 
+        const struct crypto_type *cra_type;
+
         union {
                 struct cipher_alg cipher;
                 struct digest_alg digest;