Added support for FlashSuperLayoutTask (47d70a55) · Commits · e / os / android_system_core

fastboot/fastboot.cpp

+25 −94

Original line number	Diff line number	Diff line
		@@ -982,7 +982,7 @@ static void DumpInfo() {
		fprintf(stderr, "--------------------------------------------\n");
		}

		static std::vector<SparsePtr> resparse_file(sparse_file* s, int64_t max_size) {
		std::vector<SparsePtr> resparse_file(sparse_file* s, int64_t max_size) {
		if (max_size <= 0 \|\| max_size > std::numeric_limits<uint32_t>::max()) {
		die("invalid max size %" PRId64, max_size);
		}
		@@ -1027,7 +1027,7 @@ static uint64_t get_uint_var(const char* var_name) {
		return value;
		}

		static int64_t get_sparse_limit(int64_t size) {
		int64_t get_sparse_limit(int64_t size) {
		int64_t limit = sparse_limit;
		if (limit == 0) {
		// Unlimited, so see what the target device's limit is.
		@@ -1161,7 +1161,7 @@ static bool has_vbmeta_partition() {

		// Note: this only works in userspace fastboot. In the bootloader, use
		// should_flash_in_userspace().
		static bool is_logical(const std::string& partition) {
		bool is_logical(const std::string& partition) {
		std::string value;
		return fb->GetVar("is-logical:" + partition, &value) == fastboot::SUCCESS && value == "yes";
		}
		@@ -1243,8 +1243,7 @@ static void copy_avb_footer(const std::string& partition, struct fastboot_buffer
		lseek(buf->fd.get(), 0, SEEK_SET);
		}

		static void flash_partition_files(const std::string& partition,
		const std::vector<SparsePtr>& files) {
		void flash_partition_files(const std::string& partition, const std::vector<SparsePtr>& files) {
		for (size_t i = 0; i < files.size(); i++) {
		sparse_file* s = files[i].get();
		int64_t sz = sparse_file_len(s, true, false);
		@@ -1303,7 +1302,7 @@ static int get_slot_count() {
		return count;
		}

		static bool supports_AB() {
		bool supports_AB() {
		return get_slot_count() >= 2;
		}

		@@ -1426,7 +1425,7 @@ void do_for_partitions(const std::string& part, const std::string& slot,
		}
		}

		static bool is_retrofit_device() {
		bool is_retrofit_device() {
		std::string value;
		if (fb->GetVar("super-partition-name", &value) != fastboot::SUCCESS) {
		return false;
		@@ -1562,6 +1561,20 @@ static void CancelSnapshotIfNeeded() {
		}
		}

		std::string GetPartitionName(const ImageEntry& entry, std::string& current_slot) {
		auto slot = entry.second;
		if (slot.empty()) {
		slot = current_slot;
		}
		if (slot.empty()) {
		return entry.first->part_name;
		}
		if (slot == "all") {
		LOG(FATAL) << "Cannot retrieve a singular name when using all slots";
		}
		return entry.first->part_name + "_" + slot;
		}

		class FlashAllTool {
		public:
		FlashAllTool(FlashingPlan* fp);
		@@ -1575,15 +1588,12 @@ class FlashAllTool {
		void FlashImages(const std::vector<std::pair<const Image*, std::string>>& images);
		void FlashImage(const Image& image, const std::string& slot, fastboot_buffer* buf);
		void UpdateSuperPartition();
		bool OptimizedFlashSuper();

		// If the image uses the default slot, or the user specified "all", then
		// the paired string will be empty. If the image requests a specific slot
		// (for example, system_other) it is specified instead.
		using ImageEntry = std::pair<const Image*, std::string>;

		std::string GetPartitionName(const ImageEntry& entry);

		std::vector<ImageEntry> boot_images_;
		std::vector<ImageEntry> os_images_;
		FlashingPlan* fp_;
		@@ -1612,10 +1622,13 @@ void FlashAllTool::Flash() {
		// or in bootloader fastboot.
		FlashImages(boot_images_);

		if (!OptimizedFlashSuper()) {
		auto flash_super_task = FlashSuperLayoutTask::Initialize(fp_, os_images_);

		if (flash_super_task) {
		flash_super_task->Run();
		} else {
		// Sync the super partition. This will reboot to userspace fastboot if needed.
		UpdateSuperPartition();

		// Resize any logical partition to 0, so each partition is reset to 0
		// extents, and will achieve more optimal allocation.
		for (const auto& [image, slot] : os_images_) {
		@@ -1627,77 +1640,9 @@ void FlashAllTool::Flash() {
		do_for_partitions(image->part_name, slot, resize_partition, false);
		}
		}

		// Flash OS images, resizing logical partitions as needed.
		FlashImages(os_images_);
		}

		bool FlashAllTool::OptimizedFlashSuper() {
		if (!supports_AB()) {
		LOG(VERBOSE) << "Cannot optimize flashing super on non-AB device";
		return false;
		}
		if (fp_->slot == "all") {
		LOG(VERBOSE) << "Cannot optimize flashing super for all slots";
		return false;
		}

		// Does this device use dynamic partitions at all?
		unique_fd fd = fp_->source->OpenFile("super_empty.img");
		if (fd < 0) {
		LOG(VERBOSE) << "could not open super_empty.img";
		return false;
		}

		// Try to find whether there is a super partition.
		std::string super_name;
		if (fb->GetVar("super-partition-name", &super_name) != fastboot::SUCCESS) {
		super_name = "super";
		}
		std::string partition_size_str;
		if (fb->GetVar("partition-size:" + super_name, &partition_size_str) != fastboot::SUCCESS) {
		LOG(VERBOSE) << "Cannot optimize super flashing: could not determine super partition";
		return false;
		}

		SuperFlashHelper helper(*fp_->source);
		if (!helper.Open(fd)) {
		return false;
		}

		for (const auto& entry : os_images_) {
		auto partition = GetPartitionName(entry);
		auto image = entry.first;

		if (!helper.AddPartition(partition, image->img_name, image->optional_if_no_image)) {
		return false;
		}
		}

		auto s = helper.GetSparseLayout();
		if (!s) {
		return false;
		}

		std::vector<SparsePtr> files;
		if (int limit = get_sparse_limit(sparse_file_len(s.get(), false, false))) {
		files = resparse_file(s.get(), limit);
		} else {
		files.emplace_back(std::move(s));
		}

		// Send the data to the device.
		flash_partition_files(super_name, files);

		// Remove images that we already flashed, just in case we have non-dynamic OS images.
		auto remove_if_callback = [&, this](const ImageEntry& entry) -> bool {
		return helper.WillFlash(GetPartitionName(entry));
		};
		os_images_.erase(std::remove_if(os_images_.begin(), os_images_.end(), remove_if_callback),
		os_images_.end());
		return true;
		}

		void FlashAllTool::CheckRequirements() {
		std::vector<char> contents;
		if (!fp_->source->ReadFile("android-info.txt", &contents)) {
		@@ -1811,20 +1756,6 @@ void FlashAllTool::UpdateSuperPartition() {
		}
		}

		std::string FlashAllTool::GetPartitionName(const ImageEntry& entry) {
		auto slot = entry.second;
		if (slot.empty()) {
		slot = fp_->current_slot;
		}
		if (slot.empty()) {
		return entry.first->part_name;
		}
		if (slot == "all") {
		LOG(FATAL) << "Cannot retrieve a singular name when using all slots";
		}
		return entry.first->part_name + "_" + slot;
		}

		class ZipImageSource final : public ImageSource {
		public:
		explicit ZipImageSource(ZipArchiveHandle zip) : zip_(zip) {}

fastboot/fastboot.h

+10 −2

Original line number	Diff line number	Diff line
		@@ -29,6 +29,7 @@

		#include <string>
		#include "fastboot_driver.h"
		#include "super_flash_helper.h"
		#include "util.h"

		#include <bootimg.h>
		@@ -82,7 +83,6 @@ struct FlashingPlan {
		std::string current_slot;
		std::string secondary_slot;
		fastboot::FastBootDriver* fb;

		};

		bool should_flash_in_userspace(const std::string& partition_name);
		@@ -101,3 +101,11 @@ struct NetworkSerial {
		};

		Result<NetworkSerial, FastbootError> ParseNetworkSerial(const std::string& serial);
		bool supports_AB();
		std::string GetPartitionName(const ImageEntry& entry, std::string& current_slot_);
		void flash_partition_files(const std::string& partition, const std::vector<SparsePtr>& files);
		int64_t get_sparse_limit(int64_t size);
		std::vector<SparsePtr> resparse_file(sparse_file* s, int64_t max_size);

		bool is_retrofit_device();
		bool is_logical(const std::string& partition);

fastboot/task.cpp

+79 −3

Original line number	Diff line number	Diff line
		@@ -14,11 +14,12 @@
		// limitations under the License.
		//
		#include "task.h"
		#include <iostream>
		#include "fastboot.h"
		#include "util.h"
		#include "filesystem.h"
		#include "super_flash_helper.h"

		#include "fastboot.h"
		#include "util.h"
		using namespace std::string_literals;

		FlashTask::FlashTask(const std::string& _slot, const std::string& _pname)
		: pname_(_pname), fname_(find_item(_pname)), slot_(_slot) {
		@@ -66,3 +67,78 @@ void RebootTask::Run() {
		syntax_error("unknown reboot target %s", reboot_target_.c_str());
		}
		}

		FlashSuperLayoutTask::FlashSuperLayoutTask(const std::string& super_name,
		std::unique_ptr<SuperFlashHelper> helper,
		SparsePtr sparse_layout)
		: super_name_(super_name),
		helper_(std::move(helper)),
		sparse_layout_(std::move(sparse_layout)) {}

		void FlashSuperLayoutTask::Run() {
		std::vector<SparsePtr> files;
		if (int limit = get_sparse_limit(sparse_file_len(sparse_layout_.get(), false, false))) {
		files = resparse_file(sparse_layout_.get(), limit);
		} else {
		files.emplace_back(std::move(sparse_layout_));
		}

		// Send the data to the device.
		flash_partition_files(super_name_, files);
		}

		std::unique_ptr<FlashSuperLayoutTask> FlashSuperLayoutTask::Initialize(
		FlashingPlan* fp, std::vector<ImageEntry>& os_images) {
		if (!supports_AB()) {
		LOG(VERBOSE) << "Cannot optimize flashing super on non-AB device";
		return nullptr;
		}
		if (fp->slot == "all") {
		LOG(VERBOSE) << "Cannot optimize flashing super for all slots";
		return nullptr;
		}

		// Does this device use dynamic partitions at all?
		unique_fd fd = fp->source->OpenFile("super_empty.img");

		if (fd < 0) {
		LOG(VERBOSE) << "could not open super_empty.img";
		return nullptr;
		}

		std::string super_name;
		// Try to find whether there is a super partition.
		if (fp->fb->GetVar("super-partition-name", &super_name) != fastboot::SUCCESS) {
		super_name = "super";
		}
		std::string partition_size_str;

		if (fp->fb->GetVar("partition-size:" + super_name, &partition_size_str) != fastboot::SUCCESS) {
		LOG(VERBOSE) << "Cannot optimize super flashing: could not determine super partition";
		return nullptr;
		}
		std::unique_ptr<SuperFlashHelper> helper = std::make_unique<SuperFlashHelper>(*fp->source);
		if (!helper->Open(fd)) {
		return nullptr;
		}

		for (const auto& entry : os_images) {
		auto partition = GetPartitionName(entry, fp->current_slot);
		auto image = entry.first;

		if (!helper->AddPartition(partition, image->img_name, image->optional_if_no_image)) {
		return nullptr;
		}
		}

		auto s = helper->GetSparseLayout();
		if (!s) return nullptr;

		// Remove images that we already flashed, just in case we have non-dynamic OS images.
		auto remove_if_callback = [&](const ImageEntry& entry) -> bool {
		return helper->WillFlash(GetPartitionName(entry, fp->current_slot));
		};
		os_images.erase(std::remove_if(os_images.begin(), os_images.end(), remove_if_callback),
		os_images.end());
		return std::make_unique<FlashSuperLayoutTask>(super_name, std::move(helper), std::move(s));
		}

fastboot/task.h

+18 −1

Original line number	Diff line number	Diff line
		@@ -20,6 +20,8 @@

		#include "fastboot.h"
		#include "fastboot_driver.h"
		#include "super_flash_helper.h"
		#include "util.h"

		class Task {
		public:
		@@ -53,3 +55,18 @@ class RebootTask : public Task {
		const std::string reboot_target_ = "";
		FlashingPlan* fp_;
		};

		class FlashSuperLayoutTask : public Task {
		public:
		FlashSuperLayoutTask(const std::string& super_name, std::unique_ptr<SuperFlashHelper> helper,
		SparsePtr sparse_layout);
		static std::unique_ptr<FlashSuperLayoutTask> Initialize(FlashingPlan* fp,
		std::vector<ImageEntry>& os_images);
		using ImageEntry = std::pair<const Image*, std::string>;
		void Run() override;

		private:
		const std::string super_name_;
		std::unique_ptr<SuperFlashHelper> helper_;
		SparsePtr sparse_layout_;
		};