From fe4e1de56639f1e6851ff8e47729f703a25dece4 Mon Sep 17 00:00:00 2001
From: Milan Broz <gmazyland@gmail.com>
Date: Mon, 29 Jul 2019 14:32:13 +0200
Subject: [PATCH] Mention limitiation of crypt_get_volume_key_size().

---
 lib/libcryptsetup.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/lib/libcryptsetup.h b/lib/libcryptsetup.h
index ac7615dc..d86f6fe9 100644
--- a/lib/libcryptsetup.h
+++ b/lib/libcryptsetup.h
@@ -1461,6 +1461,8 @@ uint64_t crypt_get_iv_offset(struct crypt_device *cd);
  *
  * @return volume key size
  *
+ * @note For LUKS2, this function can be used only if there is at least
+ *       one keyslot assigned to data segment.
  */
 int crypt_get_volume_key_size(struct crypt_device *cd);