tree e9880840a1c77ce51810def4d873dad21e5fa9b8
parent 5ce9fe355caf09efdb3679bec620ee486cedb731
author Tianjie Xu <xunchang@google.com> 1511918586 -0800
committer Tianjie Xu <xunchang@google.com> 1512087947 -0800

Detect interrupted update due to power off

An interrupted update may stash extra blocks in /cache, leading to a
failure when checking the cache size. We can save the incremented
retry_count in the BCB before installing the update; and distinguish
a fresh update from an interrupted one this way.

Bug: 68679601
Test: An interrupted update reapplies successfully.
Change-Id: Ic1403e1fd25a937c91ef34c14b92a0f6c8f1c0f4