tree a27ad6a7d6b2d4e0d0cdfe66e7149b4367a99b8e
parent cbacf78eff70bd43bb899e164ec2ab409bc0904c
author Kenny Root <kroot@google.com> 1285894852 -0700
committer Kenny Root <kroot@google.com> 1285894954 -0700

Better error code for unmounting not-mounted volumes

ENOENT is more descriptive than the generic error that EINVAL gets
turned into. Then we can actually treat it how we want on the other
side.

Change-Id: I9b4f3be6308e13f680eae368d2167ab9ee6aae5f