crypto: Add userspace report for larval type algorithms

Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

crypto/crypto_user.c

@@ -84,11 +84,23 @@ static int crypto_report_one(struct crypto_alg *alg,
 
 	NLA_PUT_U32(skb, CRYPTOCFGA_PRIORITY_VAL, alg->cra_priority);
 
+	if (alg->cra_flags & CRYPTO_ALG_LARVAL) {
+		struct crypto_report_larval rl;
+
+		snprintf(rl.type, CRYPTO_MAX_ALG_NAME, "%s", "larval");
+
+		NLA_PUT(skb, CRYPTOCFGA_REPORT_LARVAL,
+			sizeof(struct crypto_report_larval), &rl);
+
+		goto out;
+	}
+
 	if (alg->cra_type && alg->cra_type->report) {
 		if (alg->cra_type->report(skb, alg))
 			goto nla_put_failure;
 	}
 
+out:
 	return 0;
 
 nla_put_failure:

include/linux/cryptouser.h

@@ -36,6 +36,7 @@ enum {
 enum crypto_attr_type_t {
 	CRYPTOCFGA_UNSPEC,
 	CRYPTOCFGA_PRIORITY_VAL,	/* __u32 */
+	CRYPTOCFGA_REPORT_LARVAL,	/* struct crypto_report_larval */
 	__CRYPTOCFGA_MAX
 
 #define CRYPTOCFGA_MAX (__CRYPTOCFGA_MAX - 1)
@@ -50,3 +51,7 @@ struct crypto_user_alg {
 	__u32 cru_refcnt;
 	__u32 cru_flags;
 };
+
+struct crypto_report_larval {
+	char type[CRYPTO_MAX_NAME];
+};