libceph: introduce ceph_x_encrypt_offset()

Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Reviewed-by: Sage Weil <sage@redhat.com>

diff --git a/net/ceph/auth_x.c b/net/ceph/auth_x.c
index 28bde93..de30c58 100644 (file)
--- a/net/ceph/auth_x.c
+++ b/net/ceph/auth_x.c
@@ -39,10 +39,14 @@ static int ceph_x_should_authenticate(struct ceph_auth_client *ac)
        return need != 0;
 }
 
+static int ceph_x_encrypt_offset(void)
+{
+       return sizeof(u32) + sizeof(struct ceph_x_encrypt_header);
+}
+
 static int ceph_x_encrypt_buflen(int ilen)
 {
-       return sizeof(struct ceph_x_encrypt_header) + ilen + 16 +
-               sizeof(u32);
+       return ceph_x_encrypt_offset() + ilen + 16;
 }
 
 static int ceph_x_encrypt(struct ceph_crypto_key *secret,