Fix xfstests generic/030 failure

The actual fix is

	oldSize := f.cfs.PlainSize(uint64(fi.Size()))

the rest is logging improvements

1 files changed, 1 insertions, 1 deletions

diff --git a/cryptfs/log.go b/cryptfs/log.go
index 850ec9e..0884473 100644
--- a/cryptfs/log.go
+++ b/cryptfs/log.go
@@ -34,7 +34,7 @@ func (l *logChannel) Enable() {
 // CPU cycles
 func (l *logChannel) Md5sum(buf []byte) string {
 	if l.enabled == false {
-		return ""
+		return "disabled"
 	}
 	return md5sum(buf)
 }