Merge "Integrate libsnapshot with the boot control HAL." (0b5678e0) · Commits · e / os / android_system_core

fs_mgr/libsnapshot/Android.bp

+37 −3

Original line number	Diff line number	Diff line
		@@ -28,6 +28,7 @@ cc_defaults {
		"liblp",
		],
		static_libs: [
		"libcutils",
		"libdm",
		"libfs_mgr",
		"libfstab",
		@@ -56,6 +57,17 @@ cc_defaults {
		},
		}

		cc_defaults {
		name: "libsnapshot_hal_deps",
		cflags: [
		"-DLIBSNAPSHOT_USE_HAL",
		],
		shared_libs: [
		"android.hardware.boot@1.0",
		"android.hardware.boot@1.1",
		],
		}

		filegroup {
		name: "libsnapshot_sources",
		srcs: [
		@@ -75,7 +87,10 @@ cc_library_headers {

		cc_library_static {
		name: "libsnapshot",
		defaults: ["libsnapshot_defaults"],
		defaults: [
		"libsnapshot_defaults",
		"libsnapshot_hal_deps",
		],
		srcs: [":libsnapshot_sources"],
		whole_static_libs: [
		"libfiemap_binder",
		@@ -83,7 +98,7 @@ cc_library_static {
		}

		cc_library_static {
		name: "libsnapshot_nobinder",
		name: "libsnapshot_init",
		defaults: ["libsnapshot_defaults"],
		srcs: [":libsnapshot_sources"],
		recovery_available: true,
		@@ -92,6 +107,19 @@ cc_library_static {
		],
		}

		cc_library_static {
		name: "libsnapshot_nobinder",
		defaults: [
		"libsnapshot_defaults",
		"libsnapshot_hal_deps",
		],
		srcs: [":libsnapshot_sources"],
		recovery_available: true,
		whole_static_libs: [
		"libfiemap_passthrough",
		],
		}

		cc_test {
		name: "libsnapshot_test",
		defaults: ["libsnapshot_defaults"],
		@@ -103,11 +131,13 @@ cc_test {
		],
		shared_libs: [
		"libbinder",
		"libhidlbase",
		"libprotobuf-cpp-lite",
		"libutils",
		],
		static_libs: [
		"libcutils",
		"android.hardware.boot@1.0",
		"android.hardware.boot@1.1",
		"libcrypto_static",
		"libfs_mgr",
		"libgmock",
		@@ -134,10 +164,14 @@ cc_binary {
		"libsnapshot",
		],
		shared_libs: [
		"android.hardware.boot@1.0",
		"android.hardware.boot@1.1",
		"libbase",
		"libbinder",
		"libbinderthreadstate",
		"libext4_utils",
		"libfs_mgr",
		"libhidlbase",
		"liblog",
		"liblp",
		"libprotobuf-cpp-lite",

fs_mgr/libsnapshot/include/libsnapshot/snapshot.h

+13 −0

Original line number	Diff line number	Diff line
		@@ -49,6 +49,16 @@ struct CreateLogicalPartitionParams;
		class IPartitionOpener;
		} // namespace fs_mgr

		// Forward declare IBootControl types since we cannot include only the headers
		// with Soong. Note: keep the enum width in sync.
		namespace hardware {
		namespace boot {
		namespace V1_1 {
		enum class MergeStatus : int32_t;
		} // namespace V1_1
		} // namespace boot
		} // namespace hardware

		namespace snapshot {

		struct AutoDeleteCowImage;
		@@ -94,6 +104,7 @@ class SnapshotManager final {
		using LpMetadata = android::fs_mgr::LpMetadata;
		using MetadataBuilder = android::fs_mgr::MetadataBuilder;
		using DeltaArchiveManifest = chromeos_update_engine::DeltaArchiveManifest;
		using MergeStatus = android::hardware::boot::V1_1::MergeStatus;

		public:
		// Dependency injection for testing.
		@@ -107,6 +118,7 @@ class SnapshotManager final {
		virtual std::string GetSuperDevice(uint32_t slot) const = 0;
		virtual const IPartitionOpener& GetPartitionOpener() const = 0;
		virtual bool IsOverlayfsSetup() const = 0;
		virtual bool SetBootControlMergeStatus(MergeStatus status) = 0;
		};

		~SnapshotManager();
		@@ -208,6 +220,7 @@ class SnapshotManager final {
		FRIEND_TEST(SnapshotTest, Merge);
		FRIEND_TEST(SnapshotTest, MergeCannotRemoveCow);
		FRIEND_TEST(SnapshotTest, NoMergeBeforeReboot);
		FRIEND_TEST(SnapshotTest, UpdateBootControlHal);
		FRIEND_TEST(SnapshotUpdateTest, SnapshotStatusFileWithoutCow);
		friend class SnapshotTest;
		friend class SnapshotUpdateTest;

fs_mgr/libsnapshot/snapshot.cpp

+61 −0

Original line number	Diff line number	Diff line
		@@ -29,6 +29,9 @@
		#include <android-base/parseint.h>
		#include <android-base/strings.h>
		#include <android-base/unique_fd.h>
		#ifdef LIBSNAPSHOT_USE_HAL
		#include <android/hardware/boot/1.1/IBootControl.h>
		#endif
		#include <ext4_utils/ext4_utils.h>
		#include <fs_mgr.h>
		#include <fs_mgr_dm_linear.h>
		@@ -63,6 +66,7 @@ using android::fs_mgr::GetPartitionName;
		using android::fs_mgr::LpMetadata;
		using android::fs_mgr::MetadataBuilder;
		using android::fs_mgr::SlotNumberForSlotSuffix;
		using android::hardware::boot::V1_1::MergeStatus;
		using chromeos_update_engine::DeltaArchiveManifest;
		using chromeos_update_engine::InstallOperation;
		template <typename T>
		@@ -84,11 +88,39 @@ class DeviceInfo final : public SnapshotManager::IDeviceInfo {
		return fs_mgr_get_super_partition_name(slot);
		}
		bool IsOverlayfsSetup() const override { return fs_mgr_overlayfs_is_setup(); }
		bool SetBootControlMergeStatus(MergeStatus status) override;

		private:
		android::fs_mgr::PartitionOpener opener_;
		#ifdef LIBSNAPSHOT_USE_HAL
		android::sp<android::hardware::boot::V1_1::IBootControl> boot_control_;
		#endif
		};

		bool DeviceInfo::SetBootControlMergeStatus([[maybe_unused]] MergeStatus status) {
		#ifdef LIBSNAPSHOT_USE_HAL
		if (!boot_control_) {
		auto hal = android::hardware::boot::V1_0::IBootControl::getService();
		if (!hal) {
		LOG(ERROR) << "Could not find IBootControl HAL";
		return false;
		}
		boot_control_ = android::hardware::boot::V1_1::IBootControl::castFrom(hal);
		if (!boot_control_) {
		LOG(ERROR) << "Could not find IBootControl 1.1 HAL";
		return false;
		}
		}
		if (!boot_control_->setSnapshotMergeStatus(status)) {
		LOG(ERROR) << "Unable to set the snapshot merge status";
		return false;
		}
		return true;
		#else
		return false;
		#endif
		}

		// Note: IImageManager is an incomplete type in the header, so the default
		// destructor doesn't work.
		SnapshotManager::~SnapshotManager() {}
		@@ -1590,6 +1622,35 @@ bool SnapshotManager::WriteUpdateState(LockedFile* file, UpdateState state) {
		PLOG(ERROR) << "Could not write to state file";
		return false;
		}

		#ifdef LIBSNAPSHOT_USE_HAL
		auto merge_status = MergeStatus::UNKNOWN;
		switch (state) {
		// The needs-reboot and completed cases imply that /data and /metadata
		// can be safely wiped, so we don't report a merge status.
		case UpdateState::None:
		case UpdateState::MergeNeedsReboot:
		case UpdateState::MergeCompleted:
		merge_status = MergeStatus::NONE;
		break;
		case UpdateState::Initiated:
		case UpdateState::Unverified:
		merge_status = MergeStatus::SNAPSHOTTED;
		break;
		case UpdateState::Merging:
		case UpdateState::MergeFailed:
		merge_status = MergeStatus::MERGING;
		break;
		default:
		// Note that Cancelled flows to here - it is never written, since
		// it only communicates a transient state to the caller.
		LOG(ERROR) << "Unexpected update status: " << state;
		break;
		}
		if (!device_->SetBootControlMergeStatus(merge_status)) {
		return false;
		}
		#endif
		return true;
		}

fs_mgr/libsnapshot/snapshot_test.cpp

+25 −0

Original line number	Diff line number	Diff line
		@@ -617,6 +617,31 @@ TEST_F(SnapshotTest, FlashSuperDuringMerge) {
		ASSERT_EQ(sm->GetUpdateState(), UpdateState::None);
		}

		TEST_F(SnapshotTest, UpdateBootControlHal) {
		ASSERT_TRUE(AcquireLock());

		ASSERT_TRUE(sm->WriteUpdateState(lock_.get(), UpdateState::None));
		ASSERT_EQ(test_device->merge_status(), MergeStatus::NONE);

		ASSERT_TRUE(sm->WriteUpdateState(lock_.get(), UpdateState::Initiated));
		ASSERT_EQ(test_device->merge_status(), MergeStatus::SNAPSHOTTED);

		ASSERT_TRUE(sm->WriteUpdateState(lock_.get(), UpdateState::Unverified));
		ASSERT_EQ(test_device->merge_status(), MergeStatus::SNAPSHOTTED);

		ASSERT_TRUE(sm->WriteUpdateState(lock_.get(), UpdateState::Merging));
		ASSERT_EQ(test_device->merge_status(), MergeStatus::MERGING);

		ASSERT_TRUE(sm->WriteUpdateState(lock_.get(), UpdateState::MergeNeedsReboot));
		ASSERT_EQ(test_device->merge_status(), MergeStatus::NONE);

		ASSERT_TRUE(sm->WriteUpdateState(lock_.get(), UpdateState::MergeCompleted));
		ASSERT_EQ(test_device->merge_status(), MergeStatus::NONE);

		ASSERT_TRUE(sm->WriteUpdateState(lock_.get(), UpdateState::MergeFailed));
		ASSERT_EQ(test_device->merge_status(), MergeStatus::MERGING);
		}

		class SnapshotUpdateTest : public SnapshotTest {
		public:
		void SetUp() override {

fs_mgr/libsnapshot/test_helpers.h

+8 −0

Original line number	Diff line number	Diff line
		@@ -17,6 +17,7 @@
		#include <optional>
		#include <string>

		#include <android/hardware/boot/1.1/IBootControl.h>
		#include <gmock/gmock.h>
		#include <gtest/gtest.h>
		#include <libfiemap/image_manager.h>
		@@ -32,6 +33,7 @@ namespace snapshot {
		using android::fs_mgr::IPropertyFetcher;
		using android::fs_mgr::MetadataBuilder;
		using android::fs_mgr::testing::MockPropertyFetcher;
		using android::hardware::boot::V1_1::MergeStatus;
		using chromeos_update_engine::DeltaArchiveManifest;
		using chromeos_update_engine::PartitionUpdate;
		using testing::_;
		@@ -81,16 +83,22 @@ class TestDeviceInfo : public SnapshotManager::IDeviceInfo {
		const android::fs_mgr::IPartitionOpener& GetPartitionOpener() const override {
		return *opener_.get();
		}
		bool SetBootControlMergeStatus(MergeStatus status) override {
		merge_status_ = status;
		return true;
		}
		bool IsOverlayfsSetup() const override { return false; }

		void set_slot_suffix(const std::string& suffix) { slot_suffix_ = suffix; }
		void set_fake_super(const std::string& path) {
		opener_ = std::make_unique<TestPartitionOpener>(path);
		}
		MergeStatus merge_status() const { return merge_status_; }

		private:
		std::string slot_suffix_ = "_a";
		std::unique_ptr<TestPartitionOpener> opener_;
		MergeStatus merge_status_;
		};

		class SnapshotTestPropertyFetcher : public android::fs_mgr::testing::MockPropertyFetcher {