d58ba18272
This allows flame to boot TWRP. Still will need to work on super partition for vendor and system access. The plan will be to cherry-pick any updates to android-9.0 through gerrit.twrp.me to this branch as a WIP.
311 lines
11 KiB
C++
Executable File
311 lines
11 KiB
C++
Executable File
/*
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* Copyright (C) 2007 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "minadbd_services.h"
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#include <errno.h>
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#include <inttypes.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <functional>
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#include <memory>
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#include <set>
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#include <string>
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#include <string_view>
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#include <thread>
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#include <android-base/file.h>
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#include <android-base/logging.h>
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#include <android-base/memory.h>
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#include <android-base/parseint.h>
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#include <android-base/properties.h>
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#include <android-base/stringprintf.h>
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#include <android-base/strings.h>
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#include "adb.h"
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#include "adb_unique_fd.h"
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#include "adb_utils.h"
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#include "fdevent.h"
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#include "fuse_adb_provider.h"
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#include "fuse_sideload.h"
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#include "minadbd_types.h"
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#include "services.h"
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#include "sysdeps.h"
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static int minadbd_socket = -1;
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static bool rescue_mode = false;
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static std::string sideload_mount_point = FUSE_SIDELOAD_HOST_MOUNTPOINT;
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void SetMinadbdSocketFd(int socket_fd) {
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minadbd_socket = socket_fd;
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}
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void SetMinadbdRescueMode(bool rescue) {
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rescue_mode = rescue;
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}
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void SetSideloadMountPoint(const std::string& path) {
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sideload_mount_point = path;
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}
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static bool WriteCommandToFd(MinadbdCommand cmd, int fd) {
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char message[kMinadbdMessageSize];
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memcpy(message, kMinadbdCommandPrefix, strlen(kMinadbdStatusPrefix));
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android::base::put_unaligned(message + strlen(kMinadbdStatusPrefix), cmd);
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if (!android::base::WriteFully(fd, message, kMinadbdMessageSize)) {
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PLOG(ERROR) << "Failed to write message " << message;
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return false;
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}
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return true;
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}
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// Blocks and reads the command status from |fd|. Returns false if the received message has a
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// format error.
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static bool WaitForCommandStatus(int fd, MinadbdCommandStatus* status) {
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char buffer[kMinadbdMessageSize];
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if (!android::base::ReadFully(fd, buffer, kMinadbdMessageSize)) {
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PLOG(ERROR) << "Failed to response status from socket";
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exit(kMinadbdSocketIOError);
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}
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std::string message(buffer, buffer + kMinadbdMessageSize);
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if (!android::base::StartsWith(message, kMinadbdStatusPrefix)) {
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LOG(ERROR) << "Failed to parse status in " << message;
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return false;
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}
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*status = android::base::get_unaligned<MinadbdCommandStatus>(
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message.substr(strlen(kMinadbdStatusPrefix)).c_str());
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return true;
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}
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static MinadbdErrorCode RunAdbFuseSideload(int sfd, const std::string& args,
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MinadbdCommandStatus* status) {
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auto pieces = android::base::Split(args, ":");
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int64_t file_size;
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int block_size;
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if (pieces.size() != 2 || !android::base::ParseInt(pieces[0], &file_size) || file_size <= 0 ||
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!android::base::ParseInt(pieces[1], &block_size) || block_size <= 0) {
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LOG(ERROR) << "bad sideload-host arguments: " << args;
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return kMinadbdHostCommandArgumentError;
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}
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LOG(INFO) << "sideload-host file size " << file_size << ", block size " << block_size;
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if (!WriteCommandToFd(MinadbdCommand::kInstall, minadbd_socket)) {
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return kMinadbdSocketIOError;
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}
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auto adb_data_reader = std::make_unique<FuseAdbDataProvider>(sfd, file_size, block_size);
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if (int result = run_fuse_sideload(std::move(adb_data_reader), sideload_mount_point.c_str());
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result != 0) {
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LOG(ERROR) << "Failed to start fuse";
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return kMinadbdFuseStartError;
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}
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if (!WaitForCommandStatus(minadbd_socket, status)) {
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return kMinadbdMessageFormatError;
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}
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// Signal host-side adb to stop. For sideload mode, we always send kMinadbdServicesExitSuccess
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// (i.e. "DONEDONE") regardless of the install result. For rescue mode, we send failure message on
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// install error.
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if (!rescue_mode || *status == MinadbdCommandStatus::kSuccess) {
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if (!android::base::WriteFully(sfd, kMinadbdServicesExitSuccess,
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strlen(kMinadbdServicesExitSuccess))) {
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return kMinadbdHostSocketIOError;
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}
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} else {
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if (!android::base::WriteFully(sfd, kMinadbdServicesExitFailure,
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strlen(kMinadbdServicesExitFailure))) {
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return kMinadbdHostSocketIOError;
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}
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}
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return kMinadbdSuccess;
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}
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// Sideload service always exits after serving an install command.
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static void SideloadHostService(unique_fd sfd, const std::string& args) {
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MinadbdCommandStatus status;
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exit(RunAdbFuseSideload(sfd.get(), args, &status));
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}
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// Rescue service waits for the next command after an install command.
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static void RescueInstallHostService(unique_fd sfd, const std::string& args) {
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MinadbdCommandStatus status;
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if (auto result = RunAdbFuseSideload(sfd.get(), args, &status); result != kMinadbdSuccess) {
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exit(result);
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}
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}
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// Answers the query on a given property |prop|, by writing the result to the given |sfd|. The
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// result will be newline-terminated, so nonexistent or nonallowed query will be answered with "\n".
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// If given an empty string, dumps all the supported properties (analogous to `adb shell getprop`)
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// in lines, e.g. "[prop]: [value]".
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static void RescueGetpropHostService(unique_fd sfd, const std::string& prop) {
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static const std::set<std::string> kGetpropAllowedProps = {
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"ro.build.date.utc",
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"ro.build.fingerprint",
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"ro.build.flavor",
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"ro.build.id",
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"ro.build.product",
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"ro.build.tags",
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"ro.build.version.incremental",
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"ro.product.device",
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"ro.product.vendor.device",
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};
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std::string result;
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if (prop.empty()) {
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for (const auto& key : kGetpropAllowedProps) {
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auto value = android::base::GetProperty(key, "");
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if (value.empty()) {
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continue;
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}
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result += "[" + key + "]: [" + value + "]\n";
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}
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} else if (kGetpropAllowedProps.find(prop) != kGetpropAllowedProps.end()) {
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result = android::base::GetProperty(prop, "") + "\n";
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}
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if (result.empty()) {
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result = "\n";
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}
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if (!android::base::WriteFully(sfd, result.data(), result.size())) {
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exit(kMinadbdHostSocketIOError);
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}
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// Send heartbeat signal to keep the rescue service alive.
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if (!WriteCommandToFd(MinadbdCommand::kNoOp, minadbd_socket)) {
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exit(kMinadbdSocketIOError);
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}
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if (MinadbdCommandStatus status; !WaitForCommandStatus(minadbd_socket, &status)) {
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exit(kMinadbdMessageFormatError);
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}
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}
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// Reboots into the given target. We don't reboot directly from minadbd, but going through recovery
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// instead. This allows recovery to finish all the pending works (clear BCB, save logs etc) before
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// the reboot.
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static void RebootHostService(unique_fd /* sfd */, const std::string& target) {
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MinadbdCommand command;
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if (target == "bootloader") {
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command = MinadbdCommand::kRebootBootloader;
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} else if (target == "rescue") {
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command = MinadbdCommand::kRebootRescue;
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} else if (target == "recovery") {
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command = MinadbdCommand::kRebootRecovery;
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} else if (target == "fastboot") {
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command = MinadbdCommand::kRebootFastboot;
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} else {
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command = MinadbdCommand::kRebootAndroid;
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}
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if (!WriteCommandToFd(command, minadbd_socket)) {
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exit(kMinadbdSocketIOError);
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}
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MinadbdCommandStatus status;
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if (!WaitForCommandStatus(minadbd_socket, &status)) {
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exit(kMinadbdMessageFormatError);
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}
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}
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static void WipeDeviceService(unique_fd fd, const std::string& args) {
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auto pieces = android::base::Split(args, ":");
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if (pieces.size() != 2 || pieces[0] != "userdata") {
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LOG(ERROR) << "Failed to parse wipe device command arguments " << args;
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exit(kMinadbdHostCommandArgumentError);
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}
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size_t message_size;
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if (!android::base::ParseUint(pieces[1], &message_size) ||
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message_size < strlen(kMinadbdServicesExitSuccess)) {
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LOG(ERROR) << "Failed to parse wipe device message size in " << args;
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exit(kMinadbdHostCommandArgumentError);
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}
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WriteCommandToFd(MinadbdCommand::kWipeData, minadbd_socket);
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MinadbdCommandStatus status;
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if (!WaitForCommandStatus(minadbd_socket, &status)) {
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exit(kMinadbdMessageFormatError);
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}
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std::string response = (status == MinadbdCommandStatus::kSuccess) ? kMinadbdServicesExitSuccess
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: kMinadbdServicesExitFailure;
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response += std::string(message_size - response.size(), '\0');
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if (!android::base::WriteFully(fd, response.c_str(), response.size())) {
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exit(kMinadbdHostSocketIOError);
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}
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}
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unique_fd daemon_service_to_fd(std::string_view name, atransport* /* transport */) {
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// Common services that are supported both in sideload and rescue modes.
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if (ConsumePrefix(&name, "reboot:")) {
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// "reboot:<target>", where target must be one of the following.
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std::string args(name);
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if (args.empty() || args == "bootloader" || args == "rescue" || args == "recovery" ||
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args == "fastboot") {
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return create_service_thread("reboot",
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std::bind(RebootHostService, std::placeholders::_1, args));
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}
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return unique_fd{};
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}
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// Rescue-specific services.
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if (rescue_mode) {
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if (ConsumePrefix(&name, "rescue-install:")) {
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// rescue-install:<file-size>:<block-size>
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std::string args(name);
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return create_service_thread(
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"rescue-install", std::bind(RescueInstallHostService, std::placeholders::_1, args));
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} else if (ConsumePrefix(&name, "rescue-getprop:")) {
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// rescue-getprop:<prop>
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std::string args(name);
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return create_service_thread(
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"rescue-getprop", std::bind(RescueGetpropHostService, std::placeholders::_1, args));
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} else if (ConsumePrefix(&name, "rescue-wipe:")) {
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// rescue-wipe:target:<message-size>
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std::string args(name);
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return create_service_thread("rescue-wipe",
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std::bind(WipeDeviceService, std::placeholders::_1, args));
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}
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return unique_fd{};
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}
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// Sideload-specific services.
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if (name.starts_with("sideload:")) {
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// This exit status causes recovery to print a special error message saying to use a newer adb
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// (that supports sideload-host).
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exit(kMinadbdAdbVersionError);
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} else if (ConsumePrefix(&name, "sideload-host:")) {
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// sideload-host:<file-size>:<block-size>
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std::string args(name);
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return create_service_thread("sideload-host",
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std::bind(SideloadHostService, std::placeholders::_1, args));
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}
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return unique_fd{};
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}
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#if PLATFORM_SDK_VERSION == 23
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int service_to_fd(const char* name) {
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atransport transport;
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return service_to_fd(name, &transport);
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}
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#endif
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