Kir Kolyshkin 8b5e7a334b devmapper.shutdown: optimize ...

Move the "unmount and deactivate" code into a separate method, and
optimize it a bit:

1. Do not use filepath.Walk() as there's no requirement to recursively
   go into every directory under home/mnt; a list of directories in mnt
   is sufficient. With filepath.Walk(), in case some container will fail
   to unmount, it'll go through the whole container filesystem which is
   excessive and useless.

2. Do not use GetMounts() and check if a directory is mounted; just
   unmount it and ignore "not mounted" error. Note the same error
   is returned in case of wrong flags set, but as flags are hardcoded
   we can safely ignore such case.

While at it, promote "can't unmount" log level from debug to warning.

Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>
Upstream-commit: f1a459229724f5e8e440b49f058167c2eeeb2dc6
Component: engine

2018-03-05 10:08:56 -08:00

components/engine

devmapper.shutdown: optimize

2018-03-05 10:08:56 -08:00

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