1 files changed, 23 insertions, 0 deletions
diff --git a/include/crypto/internal/hash.h b/include/crypto/internal/hash.h
index f052afa6e7b0..2456d6ea73f0 100644
--- a/include/crypto/internal/hash.h
+++ b/include/crypto/internal/hash.h
@@ -30,6 +30,20 @@
                 __##name##_req, (req))
 
 struct ahash_request;
+struct scatterlist;
+
+struct crypto_hash_walk {
+	const char *data;
+
+	unsigned int offset;
+	unsigned int flags;
+
+	struct page *pg;
+	unsigned int entrylen;
+
+	unsigned int total;
+	struct scatterlist *sg;
+};
 
 struct ahash_instance {
 	void (*free)(struct ahash_instance *inst);
@@ -61,6 +75,15 @@ struct crypto_shash_spawn {
 	struct crypto_spawn base;
 };
 
+int crypto_hash_walk_done(struct crypto_hash_walk *walk, int err);
+int crypto_hash_walk_first(struct ahash_request *req,
+			   struct crypto_hash_walk *walk);
+
+static inline int crypto_hash_walk_last(struct crypto_hash_walk *walk)
+{
+	return !(walk->entrylen | walk->total);
+}
+
 int crypto_register_ahash(struct ahash_alg *alg);
 void crypto_unregister_ahash(struct ahash_alg *alg);
 int crypto_register_ahashes(struct ahash_alg *algs, int count);