Merge "init: generate apex-info-list.xml" am: a657c799bf am: f7cb833300 am:... (be7321f9) · Commits · e / os / android_system_core

init/Android.bp

+13 −0

Original line number	Diff line number	Diff line
		@@ -130,6 +130,7 @@ cc_defaults {
		"libpropertyinfoserializer",
		"libpropertyinfoparser",
		"libsnapshot_init",
		"libxml2",
		"lib_apex_manifest_proto_lite",
		"update_metadata-protos",
		],
		@@ -164,6 +165,9 @@ cc_library_static {
		"selinux_policy_version",
		],
		srcs: init_common_sources + init_device_sources,
		generated_sources: [
		"apex-info-list",
		],
		whole_static_libs: [
		"libcap",
		"com.android.sysprop.apex",
		@@ -178,6 +182,12 @@ cc_library_static {
		target: {
		recovery: {
		cflags: ["-DRECOVERY"],
		exclude_static_libs: [
		"libxml2",
		],
		exclude_generated_sources: [
		"apex-info-list",
		],
		exclude_shared_libs: [
		"libbinder",
		"libutils",
		@@ -212,6 +222,9 @@ cc_binary {
		target: {
		recovery: {
		cflags: ["-DRECOVERY"],
		exclude_static_libs: [
		"libxml2",
		],
		exclude_shared_libs: [
		"libbinder",
		"libutils",

init/mount_namespace.cpp

+46 −11

Original line number	Diff line number	Diff line
		@@ -27,10 +27,19 @@
		#include <android-base/properties.h>
		#include <android-base/result.h>
		#include <android-base/unique_fd.h>
		#include <apex_manifest.pb.h>

		#include "util.h"

		#ifndef RECOVERY
		#define ACTIVATE_FLATTENED_APEX 1
		#endif

		#ifdef ACTIVATE_FLATTENED_APEX
		#include <apex_manifest.pb.h>
		#include <com_android_apex.h>
		#include <selinux/android.h>
		#endif // ACTIVATE_FLATTENED_APEX

		namespace android {
		namespace init {
		namespace {
		@@ -106,6 +115,8 @@ static bool IsApexUpdatable() {
		return updatable;
		}

		#ifdef ACTIVATE_FLATTENED_APEX

		static Result<void> MountDir(const std::string& path, const std::string& mount_path) {
		if (int ret = mkdir(mount_path.c_str(), 0755); ret != 0 && errno != EEXIST) {
		return ErrnoError() << "Could not create mount point " << mount_path;
		@@ -116,7 +127,7 @@ static Result<void> MountDir(const std::string& path, const std::string& mount_p
		return {};
		}

		static Result<std::string> GetApexName(const std::string& apex_dir) {
		static Result<apex::proto::ApexManifest> GetApexManifest(const std::string& apex_dir) {
		const std::string manifest_path = apex_dir + "/apex_manifest.pb";
		std::string content;
		if (!android::base::ReadFileToString(manifest_path, &content)) {
		@@ -126,11 +137,12 @@ static Result<std::string> GetApexName(const std::string& apex_dir) {
		if (!manifest.ParseFromString(content)) {
		return Error() << "Can't parse manifest file: " << manifest_path;
		}
		return manifest.name();
		return manifest;
		}

		template <typename Fn>
		static Result<void> ActivateFlattenedApexesFrom(const std::string& from_dir,
		const std::string& to_dir) {
		const std::string& to_dir, Fn on_activate) {
		std::unique_ptr<DIR, decltype(&closedir)> dir(opendir(from_dir.c_str()), closedir);
		if (!dir) {
		return {};
		@@ -140,15 +152,16 @@ static Result<void> ActivateFlattenedApexesFrom(const std::string& from_dir,
		if (entry->d_name[0] == '.') continue;
		if (entry->d_type == DT_DIR) {
		const std::string apex_path = from_dir + "/" + entry->d_name;
		const auto apex_name = GetApexName(apex_path);
		if (!apex_name.ok()) {
		LOG(ERROR) << apex_path << " is not an APEX directory: " << apex_name.error();
		const auto apex_manifest = GetApexManifest(apex_path);
		if (!apex_manifest.ok()) {
		LOG(ERROR) << apex_path << " is not an APEX directory: " << apex_manifest.error();
		continue;
		}
		const std::string mount_path = to_dir + "/" + (*apex_name);
		const std::string mount_path = to_dir + "/" + apex_manifest->name();
		if (auto result = MountDir(apex_path, mount_path); !result.ok()) {
		return result;
		}
		on_activate(apex_path, *apex_manifest);
		}
		}
		return {};
		@@ -167,15 +180,37 @@ static bool ActivateFlattenedApexesIfPossible() {
		"/vendor/apex",
		};

		std::vector<com::android::apex::ApexInfo> apex_infos;
		auto on_activate = [&](const std::string& apex_path,
		const apex::proto::ApexManifest& apex_manifest) {
		apex_infos.emplace_back(apex_manifest.name(), apex_path, apex_path, apex_manifest.version(),
		apex_manifest.versionname(), /isFactory=/true, /isActive=/true);
		};

		for (const auto& dir : kBuiltinDirsForApexes) {
		if (auto result = ActivateFlattenedApexesFrom(dir, kApexTop); !result.ok()) {
		if (auto result = ActivateFlattenedApexesFrom(dir, kApexTop, on_activate); !result.ok()) {
		LOG(ERROR) << result.error();
		return false;
		}
		}

		std::ostringstream oss;
		com::android::apex::ApexInfoList apex_info_list(apex_infos);
		com::android::apex::write(oss, apex_info_list);
		const std::string kApexInfoList = kApexTop + "/apex-info-list.xml";
		if (!android::base::WriteStringToFile(oss.str(), kApexInfoList)) {
		PLOG(ERROR) << "Failed to write " << kApexInfoList;
		return false;
		}
		if (selinux_android_restorecon(kApexInfoList.c_str(), 0) != 0) {
		PLOG(ERROR) << "selinux_android_restorecon(" << kApexInfoList << ") failed";
		}

		return true;
		}

		#endif // ACTIVATE_FLATTENED_APEX

		static android::base::unique_fd bootstrap_ns_fd;
		static android::base::unique_fd default_ns_fd;

		@@ -269,9 +304,9 @@ bool SetupMountNamespaces() {
		default_ns_fd.reset(OpenMountNamespace());
		default_ns_id = GetMountNamespaceId();
		}

		#ifdef ACTIVATE_FLATTENED_APEX
		success &= ActivateFlattenedApexesIfPossible();

		#endif
		LOG(INFO) << "SetupMountNamespaces done";
		return success;
		}