Merge "SOURCE_COPY operation: implement src == dst" (8b8ffbb2) · Commits · e / os / android_system_core

fs_mgr/libsnapshot/include/libsnapshot/snapshot.h

+2 −0

Original line number	Diff line number	Diff line
		@@ -72,6 +72,8 @@ class SnapshotStatus;

		static constexpr const std::string_view kCowGroupName = "cow";

		bool SourceCopyOperationIsClone(const chromeos_update_engine::InstallOperation& operation);

		enum class UpdateState : unsigned int {
		// No update or merge is in progress.
		None,

+18 −0

Original line number	Diff line number	Diff line
		@@ -62,6 +62,19 @@ bool PartitionCowCreator::HasExtent(Partition* p, Extent* e) {
		return false;
		}

		bool SourceCopyOperationIsClone(const InstallOperation& operation) {
		using ChromeOSExtent = chromeos_update_engine::Extent;
		if (operation.src_extents().size() != operation.dst_extents().size()) {
		return false;
		}
		return std::equal(operation.src_extents().begin(), operation.src_extents().end(),
		operation.dst_extents().begin(),
		[](const ChromeOSExtent& src, const ChromeOSExtent& dst) {
		return src.start_block() == dst.start_block() &&
		src.num_blocks() == dst.num_blocks();
		});
		}

		void WriteExtent(DmSnapCowSizeCalculator* sc, const chromeos_update_engine::Extent& de,
		unsigned int sectors_per_block) {
		const auto block_boundary = de.start_block() + de.num_blocks();
		@@ -88,6 +101,11 @@ uint64_t PartitionCowCreator::GetCowSize() {
		if (operations == nullptr) return sc.cow_size_bytes();

		for (const auto& iop : *operations) {
		// Do not allocate space for operations that are going to be skipped
		// during OTA application.
		if (iop.type() == InstallOperation::SOURCE_COPY && SourceCopyOperationIsClone(iop))
		continue;

		for (const auto& de : iop.dst_extents()) {
		WriteExtent(&sc, de, sectors_per_block);
		}