1 /*
2 * Copyright (C) 2022 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include "host/commands/cvd/server.h"
18
19 #include <fruit/fruit.h>
20
21 #include "cvd_server.pb.h"
22
23 #include "common/libs/fs/shared_buf.h"
24 #include "common/libs/fs/shared_fd.h"
25 #include "common/libs/utils/result.h"
26 #include "host/commands/cvd/instance_manager.h"
27
28 namespace cuttlefish {
29 namespace {
30
31 class CvdShutdownHandler : public CvdServerHandler {
32 public:
INJECT(CvdShutdownHandler (CvdServer & server,InstanceManager & instance_manager))33 INJECT(CvdShutdownHandler(CvdServer& server,
34 InstanceManager& instance_manager))
35 : server_(server), instance_manager_(instance_manager) {}
36
CanHandle(const RequestWithStdio & request) const37 Result<bool> CanHandle(const RequestWithStdio& request) const override {
38 return request.Message().contents_case() ==
39 cvd::Request::ContentsCase::kShutdownRequest;
40 }
41
Handle(const RequestWithStdio & request)42 Result<cvd::Response> Handle(const RequestWithStdio& request) override {
43 CF_EXPECT(CanHandle(request));
44 cvd::Response response;
45 response.mutable_shutdown_response();
46
47 if (!request.Extra()) {
48 response.mutable_status()->set_code(cvd::Status::FAILED_PRECONDITION);
49 response.mutable_status()->set_message(
50 "Missing extra SharedFD for shutdown");
51 return response;
52 }
53
54 if (request.Message().shutdown_request().clear()) {
55 *response.mutable_status() =
56 instance_manager_.CvdClear(request.Out(), request.Err());
57 if (response.status().code() != cvd::Status::OK) {
58 return response;
59 }
60 }
61
62 if (instance_manager_.HasInstanceGroups()) {
63 response.mutable_status()->set_code(cvd::Status::FAILED_PRECONDITION);
64 response.mutable_status()->set_message(
65 "Cannot shut down cvd_server while devices are being tracked. "
66 "Try `cvd kill-server`.");
67 return response;
68 }
69
70 // Intentionally leak the write_pipe fd so that it only closes
71 // when this process fully exits.
72 (*request.Extra())->UNMANAGED_Dup();
73
74 WriteAll(request.Out(), "Stopping the cvd_server.\n");
75 server_.Stop();
76
77 response.mutable_status()->set_code(cvd::Status::OK);
78 return response;
79 }
80
Interrupt()81 Result<void> Interrupt() override { return CF_ERR("Can't interrupt"); }
82
83 private:
84 CvdServer& server_;
85 InstanceManager& instance_manager_;
86 };
87
88 } // namespace
89
90 fruit::Component<fruit::Required<CvdServer, InstanceManager>>
cvdShutdownComponent()91 cvdShutdownComponent() {
92 return fruit::createComponent()
93 .addMultibinding<CvdServerHandler, CvdShutdownHandler>();
94 }
95
96 } // namespace cuttlefish
97