Kazuyoshi Kato c383436af7 snapshots/devmapper: suspend a device to avoid data corruption ...

According to https://github.com/torvalds/linux/blob/v5.7/Documentation/admin-guide/device-mapper/thin-provisioning.rst#internal-snapshots;

> If the origin device that you wish to snapshot is active, you
> must suspend it before creating the snapshot to avoid corruption.

However the devmapper snapshotter was not doing that.

Signed-off-by: Kazuyoshi Kato <katokazu@amazon.com>

2020-07-16 15:08:07 -07:00

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