copy: include both src and dest names in clone failure diagnostic

* src/copy.c (copy_reg): Upon btrfs clone failure, print not just
the destination file name, but also the source file name.
That may be useful upon failure of a cross-device clone attempt.

diff --git a/src/copy.c b/src/copy.c
index 6edf52e..65566a0 100644 (file)
--- a/src/copy.c
+++ b/src/copy.c
@@ -974,7 +974,8 @@ copy_reg (char const *src_name, char const *dst_name,
         {
           if (!clone_ok)
             {
-              error (0, errno, _("failed to clone %s"), quote (dst_name));
+              error (0, errno, _("failed to clone %s from %s"),
+                     quote (dst_name), quote (src_name));
               return_val = false;
               goto close_src_and_dst_desc;
             }