tree c126570ace62be215c19f74e1c73eb254a121716
parent 44858971e0a0c71fa1828f1dae9381e896facf62
author Kelvin Zhang <zhangkelvin@google.com> 1608151890 -0500
committer Kelvin Zhang <zhangkelvin@google.com> 1608152445 -0500

Unconditionally save checkpoints when force = true

When saving update progress, we skiip a checkpoint if operation_num
isn't changed. But sometimes buffer offset changes without changing
operation num, namely, when we extract signature. If a checkpoint is
saved immediately before we extract signature, then we will skip the
checkpoint after signature is extracted, causing the on disk pref to
contain incorrect buffer_offset.

Pref causing resume failure: kPrefsUpdateStateNextDataOffset
Location on disk: /data/misc/update_engine/prefs/update-state-next-data-offset

Test: treehugger, serve an OTA update w/o slot switch then perform slot
switch
Bug: 175785279

Change-Id: Iea2b0b27e1af40e1961a04019e7dd498c02feb13