tree c17ba9118bcd3cba314ecd7104d09dc480881abb
parent 5cd63faf5f81c3cc45162a87d09167e2d268b038
author Yifan Hong <elsk@google.com> 1583958052 -0700
committer Yifan Hong <elsk@google.com> 1584485739 -0700

ResetStatus deletes snapshots for VAB.

When ResetStatus() is called, delete snapshots to free up space on
VAB devices.

On regular A/B, there is no need to cancel the update completely so that
the update may be resumed next time. However, on VAB devices, a
cancelled update should not occupy previously allocated space.

Test: manually call update_engine_client --cancel when an update is in progress, then
      call update_engine_client --reset_status, then
      call snapshotctl dump to check that snapshots are deleted.
      Then, re-apply the update.

Test: manually kill update_engine when an update is in progress, then
      call update_engine_client --reset_status, then
      call snapshotctl dump to check that snapshots are deleted.
      Then, re-apply the update.

Test: manually apply an update until UPDATED_NEED_REBOOT, then
      call update_engine_client --reset_status, then
      call snapshotctl dump to check that snapshots are deleted.
      Then, re-apply the update.

Test: manually apply an update until UPDATED_NEED_REBOOT, then
      kill update_engine, then
      call update_engine_client --reset_status, then
      call snapshotctl dump to check that snapshots are deleted.
      Then, re-apply the update.

Bug: 147696014

Change-Id: Ic7049772091a34e0e666fd7ae361ef474d5a28aa
Merged-In: Ic7049772091a34e0e666fd7ae361ef474d5a28aa