Merge "Make room for AVB hashtree and metadata." (b5b638f7) · Commits · e / os / android_build

core/Makefile

+4 −7

Original line number	Diff line number	Diff line
		@@ -873,6 +873,10 @@ $(if $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_SUPPORTS_VBOOT),$(hide) echo "vboot_
		$(if $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_SUPPORTS_VBOOT),$(hide) echo "vboot_subkey=$(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_VBOOT_SIGNING_SUBKEY)" >> $(1))
		$(if $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_SUPPORTS_VBOOT),$(hide) echo "futility=$(FUTILITY)" >> $(1))
		$(if $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_SUPPORTS_VBOOT),$(hide) echo "vboot_signer_cmd=$(VBOOT_SIGNER)" >> $(1))
		$(if $(BOARD_AVB_ENABLE),$(hide) echo "avb_signing_args=$(INTERNAL_AVB_SIGNING_ARGS)" >> $(1))
		$(if $(BOARD_AVB_ENABLE),$(hide) echo "avb_avbtool=$(AVBTOOL)" >> $(1))
		$(if $(BOARD_AVB_ENABLE),$(hide) echo "system_avb_enable=$(BOARD_AVB_ENABLE)" >> $(1))
		$(if $(BOARD_AVB_ENABLE),$(hide) echo "system_avb_add_hashtree_footer_args=$(BOARD_AVB_SYSTEM_ADD_HASHTREE_FOOTER_ARGS)" >> $(1))
		$(if $(filter true,$(BOARD_USES_RECOVERY_AS_BOOT)),\
		$(hide) echo "recovery_as_boot=true" >> $(1))
		$(if $(filter true,$(BOARD_BUILD_SYSTEM_ROOT_IMAGE)),\
		@@ -1180,13 +1184,6 @@ define build-systemimage-target
		fi; \
		mkdir -p $(DIST_DIR); cp $(INSTALLED_FILES_FILE) $(DIST_DIR)/installed-files-rescued.txt; \
		exit 1 )
		$(if $(BOARD_AVB_ENABLE), \
		$(hide) $(AVBTOOL) add_hashtree_footer \
		--image $(1) \
		--partition_size $(BOARD_SYSTEMIMAGE_PARTITION_SIZE) \
		--partition_name system \
		$(INTERNAL_AVB_SIGNING_ARGS) \
		$(BOARD_AVB_SYSTEM_ADD_HASHTREE_FOOTER_ARGS))
		endef

		$(BUILT_SYSTEMIMAGE): $(FULL_SYSTEMIMAGE_DEPS) $(INSTALLED_FILES_FILE) $(BUILD_IMAGE_SRCS)

tools/releasetools/add_img_to_target_files.py

+0 −17

Original line number	Diff line number	Diff line
		@@ -96,23 +96,6 @@ def AddSystem(output_zip, prefix="IMAGES/", recovery_img=None, boot_img=None):
		imgname = BuildSystem(OPTIONS.input_tmp, OPTIONS.info_dict,
		block_list=block_list)

		# AVB: if enabled, calculate and add dm-verity integrity hashes and
		# metadata to system.img.
		if OPTIONS.info_dict.get("board_avb_enable", None) == "true":
		avbtool = os.getenv('AVBTOOL') or "avbtool"
		part_size = OPTIONS.info_dict.get("system_size", None)
		cmd = [avbtool, "add_hashtree_footer", "--image", imgname,
		"--partition_size", str(part_size), "--partition_name", "system"]
		common.AppendAVBSigningArgs(cmd)
		args = OPTIONS.info_dict.get("board_avb_system_add_hashtree_footer_args",
		None)
		if args and args.strip():
		cmd.extend(shlex.split(args))
		p = common.Run(cmd, stdout=subprocess.PIPE)
		p.communicate()
		assert p.returncode == 0, "avbtool add_hashtree_footer of %s failed" % (
		os.path.basename(OPTIONS.input_tmp))

		common.ZipWrite(output_zip, imgname, prefix + "system.img")
		common.ZipWrite(output_zip, block_list, prefix + "system.map")
		return imgname

tools/releasetools/build_image.py

+79 −2

Original line number	Diff line number	Diff line
		@@ -27,6 +27,7 @@ import subprocess
		import sys
		import commands
		import common
		import shlex
		import shutil
		import sparse_img
		import tempfile
		@@ -102,6 +103,51 @@ def ZeroPadSimg(image_file, pad_size):
		simg = sparse_img.SparseImage(image_file, mode="r+b", build_map=False)
		simg.AppendFillChunk(0, blocks)

		def AVBCalcMaxImageSize(avbtool, partition_size, additional_args):
		"""Calculates max image size for a given partition size.

		Args:
		avbtool: String with path to avbtool.
		partition_size: The size of the partition in question.
		additional_args: Additional arguments to pass to 'avbtool
		add_hashtree_image'.
		Returns:
		The maximum image size or 0 if an error occurred.
		"""
		cmdline = "%s add_hashtree_footer " % avbtool
		cmdline += "--partition_size %d " % partition_size
		cmdline += "--calc_max_image_size "
		cmdline += additional_args
		(output, exit_code) = RunCommand(shlex.split(cmdline))
		if exit_code != 0:
		return 0
		else:
		return int(output)

		def AVBAddHashtree(image_path, avbtool, partition_size, partition_name,
		signing_args, additional_args):
		"""Adds dm-verity hashtree and AVB metadata to an image.

		Args:
		image_path: Path to image to modify.
		avbtool: String with path to avbtool.
		partition_size: The size of the partition in question.
		partition_name: The name of the partition - will be embedded in metadata.
		signing_args: Arguments for signing the image.
		additional_args: Additional arguments to pass to 'avbtool
		add_hashtree_image'.
		Returns:
		True if the operation succeeded.
		"""
		cmdline = "%s add_hashtree_footer " % avbtool
		cmdline += "--partition_size %d " % partition_size
		cmdline += "--partition_name %s " % partition_name
		cmdline += "--image %s " % image_path
		cmdline += signing_args + " "
		cmdline += additional_args
		(_, exit_code) = RunCommand(shlex.split(cmdline))
		return exit_code == 0

		def AdjustPartitionSizeForVerity(partition_size, fec_supported):
		"""Modifies the provided partition size to account for the verity metadata.

		@@ -375,6 +421,18 @@ def BuildImage(in_dir, prop_dict, out_file, target_out=None):
		prop_dict["original_partition_size"] = str(partition_size)
		prop_dict["verity_size"] = str(verity_size)

		# Adjust partition size for AVB.
		if prop_dict.get("avb_enable") == "true":
		avbtool = prop_dict.get("avb_avbtool")
		partition_size = int(prop_dict.get("partition_size"))
		additional_args = prop_dict["avb_add_hashtree_footer_args"]
		max_image_size = AVBCalcMaxImageSize(avbtool, partition_size,
		additional_args)
		if max_image_size == 0:
		return False
		prop_dict["partition_size"] = str(max_image_size)
		prop_dict["original_partition_size"] = str(partition_size)

		if fs_type.startswith("ext"):
		build_command = ["mkuserimg.sh"]
		if "extfs_sparse_flag" in prop_dict:
		@@ -497,6 +555,17 @@ def BuildImage(in_dir, prop_dict, out_file, target_out=None):
		if not MakeVerityEnabledImage(out_file, verity_fec_supported, prop_dict):
		return False

		# Add AVB hashtree and metadata.
		if "avb_enable" in prop_dict:
		avbtool = prop_dict.get("avb_avbtool")
		original_partition_size = int(prop_dict.get("original_partition_size"))
		partition_name = prop_dict["partition_name"]
		signing_args = prop_dict["avb_signing_args"]
		additional_args = prop_dict["avb_add_hashtree_footer_args"]
		if not AVBAddHashtree(out_file, avbtool, original_partition_size,
		partition_name, signing_args, additional_args):
		return False

		if run_fsck and prop_dict.get("skip_fsck") != "true":
		success, unsparse_image = UnsparseImage(out_file, replace=False)
		if not success:
		@@ -537,7 +606,9 @@ def ImagePropFromGlobalDict(glob_dict, mount_point):
		"verity",
		"verity_key",
		"verity_signer_cmd",
		"verity_fec"
		"verity_fec",
		"avb_signing_args",
		"avb_avbtool"
		)
		for p in common_props:
		copy_prop(p, p)
		@@ -559,6 +630,9 @@ def ImagePropFromGlobalDict(glob_dict, mount_point):
		copy_prop("system_squashfs_compressor_opt", "squashfs_compressor_opt")
		copy_prop("system_squashfs_disable_4k_align", "squashfs_disable_4k_align")
		copy_prop("system_base_fs_file", "base_fs_file")
		copy_prop("system_avb_enable", "avb_enable")
		copy_prop("system_avb_add_hashtree_footer_args",
		"avb_add_hashtree_footer_args")
		elif mount_point == "data":
		# Copy the generic fs type first, override with specific one if available.
		copy_prop("fs_type", "fs_type")
		@@ -577,12 +651,15 @@ def ImagePropFromGlobalDict(glob_dict, mount_point):
		copy_prop("vendor_squashfs_compressor_opt", "squashfs_compressor_opt")
		copy_prop("vendor_squashfs_disable_4k_align", "squashfs_disable_4k_align")
		copy_prop("vendor_base_fs_file", "base_fs_file")
		copy_prop("vendor_avb_enable", "avb_enable")
		copy_prop("vendor_avb_add_hashtree_footer_args",
		"avb_add_hashtree_footer_args")
		elif mount_point == "oem":
		copy_prop("fs_type", "fs_type")
		copy_prop("oem_size", "partition_size")
		copy_prop("oem_journal_size", "journal_size")
		copy_prop("has_ext4_reserved_blocks", "has_ext4_reserved_blocks")

		d["partition_name"] = mount_point
		return d