tree f079276076d28314b75fcd782e0bb42dd71d3c9d
parent dbadc17a271f3138113fa8bc18fc66d8def9fef8
author Gabe Black <gabeblack@chromium.org> 1413110973 -0700
committer chrome-internal-fetch <chrome-internal-fetch@google.com> 1413508397 +0000

cros_generate_update_payload: Use loopbacks instead of copying partitions.

Instead of copying around partitions, use loopback devices with partition
scanning to refer to specific partitions.

CQ-DEPEND=CL:223113
BUG=None
TEST=Ran a butterfly-paladin tryjob. Ran paygen_payload with old and new
payloads.

Change-Id: Ife003c090ce655d814b1e9c49707545ee938e841
Reviewed-on: https://chromium-review.googlesource.com/223128
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Commit-Queue: Gabe Black <gabeblack@chromium.org>
Tested-by: Gabe Black <gabeblack@chromium.org>