diff options
Diffstat (limited to 'dynamic_partition_control_android.cc')
| -rw-r--r-- | dynamic_partition_control_android.cc | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/dynamic_partition_control_android.cc b/dynamic_partition_control_android.cc index aa0f393c..ccb99ba4 100644 --- a/dynamic_partition_control_android.cc +++ b/dynamic_partition_control_android.cc @@ -838,6 +838,11 @@ bool DynamicPartitionControlAndroid::UpdatePartitionMetadata( MetadataBuilder* builder, uint32_t target_slot, const DeltaArchiveManifest& manifest) { + // Check preconditions. + CHECK(!GetVirtualAbFeatureFlag().IsEnabled() || IsRecovery()) + << "UpdatePartitionMetadata is called on a Virtual A/B device " + "but source partitions is not deleted. This is not allowed."; + // If applying downgrade from Virtual A/B to non-Virtual A/B, the left-over // COW group needs to be deleted to ensure there are enough space to create // target partitions. @@ -853,7 +858,12 @@ bool DynamicPartitionControlAndroid::UpdatePartitionMetadata( std::string expr; uint64_t allocatable_space = builder->AllocatableSpace(); - if (!GetDynamicPartitionsFeatureFlag().IsRetrofit()) { + // On device retrofitting dynamic partitions, allocatable_space = super. + // On device launching dynamic partitions w/o VAB, + // allocatable_space = super / 2. + // On device launching dynamic partitions with VAB, allocatable_space = super. + if (!GetDynamicPartitionsFeatureFlag().IsRetrofit() && + !GetVirtualAbFeatureFlag().IsEnabled()) { allocatable_space /= 2; expr = "half of "; } |