1 // Copyright 2021, The Android Open Source Project
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 // http://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14
15 //! Android VirtualizationService
16
17 mod aidl;
18 mod composite;
19 mod crosvm;
20 mod payload;
21 mod selinux;
22
23 use crate::aidl::{VirtualizationService, BINDER_SERVICE_IDENTIFIER, TEMPORARY_DIRECTORY};
24 use android_system_virtualizationservice::aidl::android::system::virtualizationservice::IVirtualizationService::BnVirtualizationService;
25 use android_system_virtualizationservice::binder::{register_lazy_service, BinderFeatures, ProcessState};
26 use anyhow::Error;
27 use log::{info, Level};
28 use std::fs::{remove_dir_all, remove_file, read_dir};
29
30 /// The first CID to assign to a guest VM managed by the VirtualizationService. CIDs lower than this
31 /// are reserved for the host or other usage.
32 const FIRST_GUEST_CID: Cid = 10;
33
34 const SYSPROP_LAST_CID: &str = "virtualizationservice.state.last_cid";
35
36 const LOG_TAG: &str = "VirtualizationService";
37
38 /// The unique ID of a VM used (together with a port number) for vsock communication.
39 type Cid = u32;
40
main()41 fn main() {
42 android_logger::init_once(
43 android_logger::Config::default()
44 .with_tag(LOG_TAG)
45 .with_min_level(Level::Info)
46 .with_log_id(android_logger::LogId::System),
47 );
48
49 clear_temporary_files().expect("Failed to delete old temporary files");
50
51 let service = VirtualizationService::init();
52 let service = BnVirtualizationService::new_binder(
53 service,
54 BinderFeatures { set_requesting_sid: true, ..BinderFeatures::default() },
55 );
56 register_lazy_service(BINDER_SERVICE_IDENTIFIER, service.as_binder()).unwrap();
57 info!("Registered Binder service, joining threadpool.");
58 ProcessState::join_thread_pool();
59 }
60
61 /// Remove any files under `TEMPORARY_DIRECTORY`.
clear_temporary_files() -> Result<(), Error>62 fn clear_temporary_files() -> Result<(), Error> {
63 for dir_entry in read_dir(TEMPORARY_DIRECTORY)? {
64 let dir_entry = dir_entry?;
65 let path = dir_entry.path();
66 if dir_entry.file_type()?.is_dir() {
67 remove_dir_all(path)?;
68 } else {
69 remove_file(path)?;
70 }
71 }
72 Ok(())
73 }
74
75 #[cfg(test)]
76 mod tests {
77 /// We need to have at least one test to avoid errors running the test suite, so this is a
78 /// placeholder until we have real tests.
79 #[test]
80 #[ignore]
placeholder()81 fn placeholder() {}
82 }
83