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269 lines
8.6 KiB
269 lines
8.6 KiB
/*
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* Copyright (C) 2018 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 <dirent.h>
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#include <inttypes.h>
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#include <limits.h>
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#include <stdio.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/wait.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <signal.h>
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#include <algorithm>
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#include <cstdlib>
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#include <fstream>
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#include <iomanip>
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#include <memory>
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#include <sstream>
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#include <string>
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#include <vector>
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#include <android-base/strings.h>
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#include <gflags/gflags.h>
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#include <android-base/logging.h>
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#include "common/libs/fs/shared_fd.h"
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#include "common/libs/fs/shared_select.h"
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#include "common/libs/utils/environment.h"
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#include "host/commands/run_cvd/runner_defs.h"
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#include "host/libs/allocd/request.h"
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#include "host/libs/allocd/utils.h"
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#include "host/libs/config/cuttlefish_config.h"
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#include "host/libs/vm_manager/vm_manager.h"
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DEFINE_int32(wait_for_launcher, 5,
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"How many seconds to wait for the launcher to respond to the stop "
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"command. A value of zero means wait indefinetly");
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namespace cuttlefish {
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namespace {
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std::set<std::string> FallbackPaths() {
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std::set<std::string> paths;
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std::string parent_path = StringFromEnv("HOME", ".");
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paths.insert(parent_path + "/cuttlefish_assembly");
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paths.insert(parent_path + "/cuttlefish_assembly/*");
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std::unique_ptr<DIR, int(*)(DIR*)> dir(opendir(parent_path.c_str()), closedir);
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for (auto entity = readdir(dir.get()); entity != nullptr; entity = readdir(dir.get())) {
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std::string subdir(entity->d_name);
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if (!android::base::StartsWith(subdir, "cuttlefish_runtime.")) {
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continue;
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}
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auto instance_dir = parent_path + "/" + subdir;
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// Add the instance directory
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paths.insert(instance_dir);
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// Add files in instance dir
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paths.insert(instance_dir + "/*");
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// Add files in the tombstone directory
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paths.insert(instance_dir + "/tombstones/*");
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// Add files in the internal directory
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paths.insert(instance_dir + "/" + std::string(kInternalDirName) + "/*");
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// Add files in the shared directory
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paths.insert(instance_dir + "/" + std::string(kSharedDirName) + "/*");
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}
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return paths;
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}
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std::set<std::string> PathsForInstance(const CuttlefishConfig& config,
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const CuttlefishConfig::InstanceSpecific instance) {
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return {
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config.assembly_dir(),
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config.assembly_dir() + "/*",
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instance.instance_dir(),
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instance.PerInstancePath("*"),
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instance.PerInstancePath("tombstones"),
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instance.PerInstancePath("tombstones/*"),
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instance.instance_internal_dir(),
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instance.PerInstanceInternalPath("*"),
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instance.PerInstancePath(kSharedDirName),
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instance.PerInstancePath(kSharedDirName) + "/*",
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};
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}
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// Gets a set of the possible process groups of a previous launch
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std::set<pid_t> GetCandidateProcessGroups(const std::set<std::string>& paths) {
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std::stringstream cmd;
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cmd << "lsof -t 2>/dev/null";
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for (const auto& path : paths) {
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cmd << " " << path;
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}
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std::string cmd_str = cmd.str();
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std::shared_ptr<FILE> cmd_out(popen(cmd_str.c_str(), "r"), pclose);
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if (!cmd_out) {
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LOG(ERROR) << "Unable to execute '" << cmd_str << "': " << strerror(errno);
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return {};
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}
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int64_t pid;
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std::set<pid_t> ret{};
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while(fscanf(cmd_out.get(), "%" PRId64, &pid) != EOF) {
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pid_t pgid = getpgid(static_cast<pid_t>(pid));
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if (pgid < 0) {
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LOG(ERROR) << "Unable to get process group of " << pid << ": "
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<< strerror(errno);
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continue;
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}
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ret.insert(pgid);
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}
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// The process group of stop_cvd should not be killed
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ret.erase(getpgrp());
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return ret;
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}
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int FallBackStop(const std::set<std::string>& paths) {
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auto exit_code = 1; // Having to fallback is an error
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auto process_groups = GetCandidateProcessGroups(paths);
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for (auto pgid: process_groups) {
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LOG(INFO) << "Sending SIGKILL to process group " << pgid;
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auto retval = killpg(pgid, SIGKILL);
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if (retval < 0) {
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LOG(ERROR) << "Failed to kill process group " << pgid << ": "
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<< strerror(errno);
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exit_code |= 4;
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}
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}
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return exit_code;
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}
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bool CleanStopInstance(const CuttlefishConfig::InstanceSpecific& instance) {
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auto monitor_path = instance.launcher_monitor_socket_path();
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if (monitor_path.empty()) {
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LOG(ERROR) << "No path to launcher monitor found";
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return false;
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}
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auto monitor_socket = SharedFD::SocketLocalClient(
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monitor_path.c_str(), false, SOCK_STREAM, FLAGS_wait_for_launcher);
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if (!monitor_socket->IsOpen()) {
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LOG(ERROR) << "Unable to connect to launcher monitor at " << monitor_path
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<< ": " << monitor_socket->StrError();
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return false;
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}
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auto request = LauncherAction::kStop;
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auto bytes_sent = monitor_socket->Send(&request, sizeof(request), 0);
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if (bytes_sent < 0) {
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LOG(ERROR) << "Error sending launcher monitor the stop command: "
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<< monitor_socket->StrError();
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return false;
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}
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// Perform a select with a timeout to guard against launcher hanging
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SharedFDSet read_set;
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read_set.Set(monitor_socket);
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struct timeval timeout = {FLAGS_wait_for_launcher, 0};
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int selected = Select(&read_set, nullptr, nullptr,
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FLAGS_wait_for_launcher <= 0 ? nullptr : &timeout);
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if (selected < 0){
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LOG(ERROR) << "Failed communication with the launcher monitor: "
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<< strerror(errno);
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return false;
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}
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if (selected == 0) {
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LOG(ERROR) << "Timeout expired waiting for launcher monitor to respond";
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return false;
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}
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LauncherResponse response;
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auto bytes_recv = monitor_socket->Recv(&response, sizeof(response), 0);
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if (bytes_recv < 0) {
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LOG(ERROR) << "Error receiving response from launcher monitor: "
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<< monitor_socket->StrError();
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return false;
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}
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if (response != LauncherResponse::kSuccess) {
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LOG(ERROR) << "Received '" << static_cast<char>(response)
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<< "' response from launcher monitor";
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return false;
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}
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LOG(INFO) << "Successfully stopped device " << instance.adb_ip_and_port();
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return true;
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}
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int StopInstance(const CuttlefishConfig& config,
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const CuttlefishConfig::InstanceSpecific& instance) {
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bool res = CleanStopInstance(instance);
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if (!res) {
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return FallBackStop(PathsForInstance(config, instance));
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}
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return 0;
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}
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/// Send a StopSession request to allocd
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void ReleaseAllocdResources(SharedFD allocd_sock, uint32_t session_id) {
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if (!allocd_sock->IsOpen() || session_id == -1) {
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return;
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}
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Json::Value config;
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Json::Value request_list;
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Json::Value req;
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req["request_type"] =
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ReqTyToStr(RequestType::StopSession);
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req["session_id"] = session_id;
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request_list.append(req);
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config["config_request"]["request_list"] = request_list;
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SendJsonMsg(allocd_sock, config);
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auto resp_opt = RecvJsonMsg(allocd_sock);
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if (!resp_opt.has_value()) {
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LOG(ERROR) << "Bad response from allocd";
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return;
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}
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auto resp = resp_opt.value();
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LOG(INFO) << "Stop Session operation: " << resp["config_status"];
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}
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int StopCvdMain(int argc, char** argv) {
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::android::base::InitLogging(argv, android::base::StderrLogger);
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google::ParseCommandLineFlags(&argc, &argv, true);
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auto config = CuttlefishConfig::Get();
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if (!config) {
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LOG(ERROR) << "Failed to obtain config object";
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return FallBackStop(FallbackPaths());
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}
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int ret = 0;
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for (const auto& instance : config->Instances()) {
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auto session_id = instance.session_id();
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int exit_status = StopInstance(*config, instance);
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if (exit_status == 0 && instance.use_allocd()) {
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// only release session resources if the instance was stopped
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SharedFD allocd_sock =
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SharedFD::SocketLocalClient(kDefaultLocation, false, SOCK_STREAM);
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if (!allocd_sock->IsOpen()) {
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LOG(ERROR) << "Unable to connect to allocd on "
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<< kDefaultLocation << ": "
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<< allocd_sock->StrError();
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}
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ReleaseAllocdResources(allocd_sock, session_id);
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}
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ret |= exit_status;
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}
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return ret;
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}
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} // namespace
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} // namespace cuttlefish
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int main(int argc, char** argv) {
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return cuttlefish::StopCvdMain(argc, argv);
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}
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