Support updateable groups.
Adds updateable group support to OTA.
* DeltaPerformer combines partition sizes with
dynamic_partition_metadata to
BootControlInterface::PartitionMetadata.
* BootControlAndroid::InitPartitionMetadata:
* Copy all groups / partitions from source metadata slot
* Remove all groups / partitions mentioned in the manifest (of the
target slot)
* Re-add all groups / partitions mentioned in the manifest.
* BootControlAndroid::InitPartitionMetadata can check
the incoming PartitionMetadata to see if a partition is dynamic
or not. The guessing logic is completely removed.
* Because a partition is removed then re-added, there is no need
for preserving the entry with size 0 to indicate that a partition
is removed. When update_engine sees a partition in a group "foo" on
the device, but manifest contains group "foo" without the partition,
it removes the partition.
* Hence, Removing a partition does NOT require keeping the entry (i.e.
RemovePartition is used instead of ShrinkPartition(0) ). This makes
retrofitting dynamic partitions on older devices easier.
The following is now allowed:
- Adding / removing / resizing partitions
- Adding / resizing groups
It is not allowed to remove a group, but a group can always be resized
to zero to deprecate it.
Test: update_engine_unittests
Bug: 117182932
Change-Id: I39d77f1d1d1fc52fc245f3de699635e6a429015e
4 files changed