Merge "Load boot image props." am: ac46ab3c93 (7c36db18) · Commits · e / os / android_system_core

init/Android.mk

+1 −0

Original line number	Diff line number	Diff line
		@@ -80,6 +80,7 @@ LOCAL_POST_INSTALL_CMD := mkdir -p \
		$(TARGET_RAMDISK_OUT)/dev \
		$(TARGET_RAMDISK_OUT)/mnt \
		$(TARGET_RAMDISK_OUT)/proc \
		$(TARGET_RAMDISK_OUT)/second_stage_resources \
		$(TARGET_RAMDISK_OUT)/sys \

		LOCAL_STATIC_LIBRARIES := \

+20 −0

Original line number	Diff line number	Diff line
		@@ -41,6 +41,7 @@
		#include "first_stage_console.h"
		#include "first_stage_mount.h"
		#include "reboot_utils.h"
		#include "second_stage_resources.h"
		#include "switch_root.h"
		#include "util.h"

		@@ -235,6 +236,11 @@ int FirstStageMain(int argc, char** argv) {
		// /debug_ramdisk is used to preserve additional files from the debug ramdisk
		CHECKCALL(mount("tmpfs", "/debug_ramdisk", "tmpfs", MS_NOEXEC \| MS_NOSUID \| MS_NODEV,
		"mode=0755,uid=0,gid=0"));

		// /second_stage_resources is used to preserve files from first to second
		// stage init
		CHECKCALL(mount("tmpfs", kSecondStageRes, "tmpfs", MS_NOEXEC \| MS_NOSUID \| MS_NODEV,
		"mode=0755,uid=0,gid=0"))
		#undef CHECKCALL

		SetStdioToDevNull(argv);
		@@ -276,6 +282,20 @@ int FirstStageMain(int argc, char** argv) {
		StartConsole();
		}

		if (access(kBootImageRamdiskProp, F_OK) == 0) {
		std::string dest = GetRamdiskPropForSecondStage();
		std::string dir = android::base::Dirname(dest);
		std::error_code ec;
		if (!fs::create_directories(dir, ec)) {
		LOG(FATAL) << "Can't mkdir " << dir << ": " << ec.message();
		}
		if (!fs::copy_file(kBootImageRamdiskProp, dest, ec)) {
		LOG(FATAL) << "Can't copy " << kBootImageRamdiskProp << " to " << dest << ": "
		<< ec.message();
		}
		LOG(INFO) << "Copied ramdisk prop to " << dest;
		}

		if (ForceNormalBoot(cmdline)) {
		mkdir("/first_stage_ramdisk", 0755);
		// SwitchRoot() must be called with a mount point as the target, so we bind mount the

+10 −0

Original line number	Diff line number	Diff line
		@@ -71,6 +71,7 @@
		#include "proto_utils.h"
		#include "reboot.h"
		#include "reboot_utils.h"
		#include "second_stage_resources.h"
		#include "security.h"
		#include "selabel.h"
		#include "selinux.h"
		@@ -668,6 +669,12 @@ static void UmountDebugRamdisk() {
		}
		}

		static void UmountSecondStageRes() {
		if (umount(kSecondStageRes) != 0) {
		PLOG(ERROR) << "Failed to umount " << kSecondStageRes;
		}
		}

		static void MountExtraFilesystems() {
		#define CHECKCALL(x) \
		if ((x) != 0) PLOG(FATAL) << #x " failed.";
		@@ -776,6 +783,9 @@ int SecondStageMain(int argc, char** argv) {

		PropertyInit();

		// Umount second stage resources after property service has read the .prop files.
		UmountSecondStageRes();

		// Umount the debug ramdisk after property service has read the .prop files when it means to.
		if (load_debug_prop) {
		UmountDebugRamdisk();

+11 −0

Original line number	Diff line number	Diff line
		@@ -67,6 +67,7 @@
		#include "persistent_properties.h"
		#include "property_type.h"
		#include "proto_utils.h"
		#include "second_stage_resources.h"
		#include "selinux.h"
		#include "subcontext.h"
		#include "system/core/init/property_service.pb.h"
		@@ -745,6 +746,15 @@ static bool load_properties_from_file(const char* filename, const char* filter,
		return true;
		}

		static void LoadPropertiesFromSecondStageRes(std::map<std::string, std::string>* properties) {
		std::string prop = GetRamdiskPropForSecondStage();
		if (access(prop.c_str(), R_OK) != 0) {
		CHECK(errno == ENOENT) << "Cannot access " << prop << ": " << strerror(errno);
		return;
		}
		load_properties_from_file(prop.c_str(), nullptr, properties);
		}

		// persist.sys.usb.config values can't be combined on build-time when property
		// files are split into each partition.
		// So we need to apply the same rule of build/make/tools/post_process_props.py
		@@ -933,6 +943,7 @@ void PropertyLoadBootDefaults() {

		// Order matters here. The more the partition is specific to a product, the higher its
		// precedence is.
		LoadPropertiesFromSecondStageRes(&properties);
		load_properties_from_file("/system/build.prop", nullptr, &properties);
		load_properties_from_partition("system_ext", /* support_legacy_path_until */ 30);
		// TODO(b/117892318): uncomment the following condition when vendor.imgs for aosp_* targets are

0 → 100644

+32 −0

Original line number	Diff line number	Diff line
		/*
		* Copyright (C) 2020 The Android Open Source Project
		*
		* Licensed under the Apache License, Version 2.0 (the "License");
		* you may not use this file except in compliance with the License.
		* You may obtain a copy of the License at
		*
		* http://www.apache.org/licenses/LICENSE-2.0
		*
		* Unless required by applicable law or agreed to in writing, software
		* distributed under the License is distributed on an "AS IS" BASIS,
		* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
		* See the License for the specific language governing permissions and
		* limitations under the License.
		*/

		#pragma once

		#include <string>

		namespace android {
		namespace init {

		constexpr const char kSecondStageRes[] = "/second_stage_resources";
		constexpr const char kBootImageRamdiskProp[] = "/system/etc/ramdisk/build.prop";

		inline std::string GetRamdiskPropForSecondStage() {
		return std::string(kSecondStageRes) + kBootImageRamdiskProp;
		}

		} // namespace init
		} // namespace android