tree 63f4fdc7efbe2a403ee6b058c65f15d18d6f4b21
parent d41a1f9add9c1feb4aa8f38ad9850f39d715d8bf
author David Anderson <dvander@google.com> 1529525731 -0700
committer David Anderson <dvander@google.com> 1529610514 -0700

libdm: Add DmTargetTypeInfo and a unit test.

This change refactors DmTarget. It was satisfying two separate use cases
that have no overlap: (1) as a container for informational queries, and
(2) for specifying table targets.

The kernel's nomenclature for the former is a "target type," so the new
class is named DmTargetTypeInfo.

In addition, this change adds a unit test for
DeviceMapper::GetAvailableTargets that ensures the device has at least a
linear target type (with more TBD).

Bug: 110035986
Test: libdm_test gtest
Change-Id: Icb87976801e8a1e6ec79e48b1d58c308d36279e5