tree 0173db33bc1bd984878ca8bd254a8f0b4e3b051d
parent b753e0e9258170dce7c62733eed78e616b4a37b2
author Yifan Hong <elsk@google.com> 1597352394 -0700
committer Treehugger Robot <treehugger-gerrit@google.com> 1597862551 +0000

Check allocatable space correctly when sideloading on VAB

On a device with Virtual A/B, when sideloading and there's
not enough space in super partition to hold CoW, update_engine
falls back to overwriting all source partitions. In that case,
the allocatable space should be the whole super partition, not
a half of it.

Also update doc comments.

Test: unit test. RecoveryErrorShouldDeleteSource fails without the patch
but succeeds with the patch.

Bug: 163613538
Change-Id: I6bd6895a7eabeb4e8436e57b0ac6830c11d1e98f