[CRYPTO] skcipher: Added geniv field

This patch introduces the geniv field which indicates the default IV
generator for each algorithm.  It should point to a string that is not
freed as long as the algorithm is registered.

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

crypto/ablkcipher.c

@@ -96,6 +96,7 @@ static void crypto_ablkcipher_show(struct seq_file *m, struct crypto_alg *alg)
 	seq_printf(m, "min keysize  : %u\n", ablkcipher->min_keysize);
 	seq_printf(m, "max keysize  : %u\n", ablkcipher->max_keysize);
 	seq_printf(m, "ivsize       : %u\n", ablkcipher->ivsize);
+	seq_printf(m, "geniv        : %s\n", ablkcipher->geniv ?: "<default>");
 }
 
 const struct crypto_type crypto_ablkcipher_type = {
@@ -142,6 +143,7 @@ static void crypto_givcipher_show(struct seq_file *m, struct crypto_alg *alg)
 	seq_printf(m, "min keysize  : %u\n", ablkcipher->min_keysize);
 	seq_printf(m, "max keysize  : %u\n", ablkcipher->max_keysize);
 	seq_printf(m, "ivsize       : %u\n", ablkcipher->ivsize);
+	seq_printf(m, "geniv        : %s\n", ablkcipher->geniv ?: "<built-in>");
 }
 
 const struct crypto_type crypto_givcipher_type = {

crypto/blkcipher.c

@@ -496,6 +496,8 @@ static void crypto_blkcipher_show(struct seq_file *m, struct crypto_alg *alg)
 	seq_printf(m, "min keysize  : %u\n", alg->cra_blkcipher.min_keysize);
 	seq_printf(m, "max keysize  : %u\n", alg->cra_blkcipher.max_keysize);
 	seq_printf(m, "ivsize       : %u\n", alg->cra_blkcipher.ivsize);
+	seq_printf(m, "geniv        : %s\n", alg->cra_blkcipher.geniv ?:
+					     "<default>");
 }
 
 const struct crypto_type crypto_blkcipher_type = {

include/linux/crypto.h

@@ -183,6 +183,8 @@ struct ablkcipher_alg {
 	int (*givencrypt)(struct skcipher_givcrypt_request *req);
 	int (*givdecrypt)(struct skcipher_givcrypt_request *req);
 
+	const char *geniv;
+
 	unsigned int min_keysize;
 	unsigned int max_keysize;
 	unsigned int ivsize;
@@ -209,6 +211,8 @@ struct blkcipher_alg {
 		       struct scatterlist *dst, struct scatterlist *src,
 		       unsigned int nbytes);
 
+	const char *geniv;
+
 	unsigned int min_keysize;
 	unsigned int max_keysize;
 	unsigned int ivsize;