tree ed7a96fe63f00e28d6d64bfac74e339b135f8a4b
parent 4061c51718ce1aa75bf3b0a7594ca05093026619
author Kelvin Zhang <zhangkelvin@google.com> 1614094237 -0500
committer Kelvin Zhang <zhangkelvin@google.com> 1623098027 +0000

Simplify logic for PerformSourceCopyOperation

PartitionWriter::PerformSourceCopyOperation has the following logic:

1. If source hash matches data on device, use regular fd
2. If source hash mismatches but we can recover using FEC, use FEC fd
3. Otherwise, fail the OTA

All of the above logic is already handled in ChooseSourceFD, no need to
duplicate them in PerformSourceCopyOperation.

This CL introduces a slight change in behavior:
old behavior:
When we detect a source hash mismatch, still finish writing current op,
then fail.

new behavior:
when we detect a source hash mismatch, fail the OTA immediately and
don't write anything.

Test: th
Change-Id: Ib9526a5383219fabdae163a6384679f67b50d8c2