Merge "ueventd: Allow pattern matching to find external firmware handler" am:... (1875508c) · Commits · e / os / android_system_core

init/firmware_handler.cpp

+32 −1

Original line number	Diff line number	Diff line
		@@ -17,6 +17,7 @@
		#include "firmware_handler.h"

		#include <fcntl.h>
		#include <fnmatch.h>
		#include <glob.h>
		#include <pwd.h>
		#include <signal.h>
		@@ -46,6 +47,20 @@ using android::base::WriteFully;
		namespace android {
		namespace init {

		namespace {
		bool PrefixMatch(const std::string& pattern, const std::string& path) {
		return android::base::StartsWith(path, pattern);
		}

		bool FnMatch(const std::string& pattern, const std::string& path) {
		return fnmatch(pattern.c_str(), path.c_str(), 0) == 0;
		}

		bool EqualMatch(const std::string& pattern, const std::string& path) {
		return pattern == path;
		}
		} // namespace

		static void LoadFirmware(const std::string& firmware, const std::string& root, int fw_fd,
		size_t fw_size, int loading_fd, int data_fd) {
		// Start transfer.
		@@ -66,6 +81,22 @@ static bool IsBooting() {
		return access("/dev/.booting", F_OK) == 0;
		}

		ExternalFirmwareHandler::ExternalFirmwareHandler(std::string devpath, uid_t uid,
		std::string handler_path)
		: devpath(std::move(devpath)), uid(uid), handler_path(std::move(handler_path)) {
		auto wildcard_position = this->devpath.find('*');
		if (wildcard_position != std::string::npos) {
		if (wildcard_position == this->devpath.length() - 1) {
		this->devpath.pop_back();
		match = std::bind(PrefixMatch, this->devpath, std::placeholders::_1);
		} else {
		match = std::bind(FnMatch, this->devpath, std::placeholders::_1);
		}
		} else {
		match = std::bind(EqualMatch, this->devpath, std::placeholders::_1);
		}
		}

		FirmwareHandler::FirmwareHandler(std::vector<std::string> firmware_directories,
		std::vector<ExternalFirmwareHandler> external_firmware_handlers)
		: firmware_directories_(std::move(firmware_directories)),
		@@ -160,7 +191,7 @@ Result<std::string> FirmwareHandler::RunExternalHandler(const std::string& handl

		std::string FirmwareHandler::GetFirmwarePath(const Uevent& uevent) const {
		for (const auto& external_handler : external_firmware_handlers_) {
		if (external_handler.devpath == uevent.path) {
		if (external_handler.match(uevent.path)) {
		LOG(INFO) << "Launching external firmware handler '" << external_handler.handler_path
		<< "' for devpath: '" << uevent.path << "' firmware: '" << uevent.firmware
		<< "'";

init/firmware_handler.h

+4 −2

Original line number	Diff line number	Diff line
		@@ -30,11 +30,13 @@ namespace android {
		namespace init {

		struct ExternalFirmwareHandler {
		ExternalFirmwareHandler(std::string devpath, uid_t uid, std::string handler_path)
		: devpath(std::move(devpath)), uid(uid), handler_path(std::move(handler_path)) {}
		ExternalFirmwareHandler(std::string devpath, uid_t uid, std::string handler_path);

		std::string devpath;
		uid_t uid;
		std::string handler_path;

		std::function<bool(const std::string&)> match;
		};

		class FirmwareHandler : public UeventHandler {

init/ueventd_parser_test.cpp

+18 −0

Original line number	Diff line number	Diff line
		@@ -154,6 +154,9 @@ TEST(ueventd_parser, ExternalFirmwareHandlers) {
		external_firmware_handler devpath root handler_path
		external_firmware_handler /devices/path/firmware/something001.bin system /vendor/bin/firmware_handler.sh
		external_firmware_handler /devices/path/firmware/something002.bin radio "/vendor/bin/firmware_handler.sh --has --arguments"
		external_firmware_handler /devices/path/firmware/* root "/vendor/bin/firmware_handler.sh"
		external_firmware_handler /devices/path/firmware/something* system "/vendor/bin/firmware_handler.sh"
		external_firmware_handler /devices/path//firmware/something.bin radio "/vendor/bin/firmware_handler.sh"
		)";

		auto external_firmware_handlers = std::vector<ExternalFirmwareHandler>{
		@@ -172,6 +175,21 @@ external_firmware_handler /devices/path/firmware/something002.bin radio "/vendor
		AID_RADIO,
		"/vendor/bin/firmware_handler.sh --has --arguments",
		},
		{
		"/devices/path/firmware/",
		AID_ROOT,
		"/vendor/bin/firmware_handler.sh",
		},
		{
		"/devices/path/firmware/something",
		AID_SYSTEM,
		"/vendor/bin/firmware_handler.sh",
		},
		{
		"/devices/path//firmware/something.bin",
		AID_RADIO,
		"/vendor/bin/firmware_handler.sh",
		},
		};

		TestUeventdFile(ueventd_file, {{}, {}, {}, {}, external_firmware_handlers});