Remove cid parameter from VirtualMachineService

Cid parameter has been passed just to identify the guest VMs. This makes
the server identify itself, with incoming vsock address.

Bug: 199259751
Test: atest MicrodroidHostTestCases ComposHostTestCases
Change-Id: I8dacfec80574fe765b96139cdecb6f3192728577
diff --git a/microdroid_manager/src/main.rs b/microdroid_manager/src/main.rs
index 177a0db..ac62e58 100644
--- a/microdroid_manager/src/main.rs
+++ b/microdroid_manager/src/main.rs
@@ -27,12 +27,11 @@
 use log::{error, info, warn};
 use microdroid_metadata::{write_metadata, Metadata};
 use microdroid_payload_config::{Task, TaskType, VmPayloadConfig};
-use nix::ioctl_read_bad;
 use payload::{get_apex_data_from_payload, load_metadata, to_metadata};
 use rustutils::system_properties;
 use rustutils::system_properties::PropertyWatcher;
 use std::fs::{self, File, OpenOptions};
-use std::os::unix::io::{AsRawFd, FromRawFd, IntoRawFd};
+use std::os::unix::io::{FromRawFd, IntoRawFd};
 use std::path::Path;
 use std::process::{Command, Stdio};
 use std::str;
@@ -67,27 +66,6 @@
     }
 }
 
-const IOCTL_VM_SOCKETS_GET_LOCAL_CID: usize = 0x7b9;
-ioctl_read_bad!(
-    /// Gets local cid from /dev/vsock
-    vm_sockets_get_local_cid,
-    IOCTL_VM_SOCKETS_GET_LOCAL_CID,
-    u32
-);
-
-// TODO: remove this after VS can check the peer addresses of binder clients
-fn get_local_cid() -> Result<u32> {
-    let f = OpenOptions::new()
-        .read(true)
-        .write(false)
-        .open("/dev/vsock")
-        .context("failed to open /dev/vsock")?;
-    let mut ret = 0;
-    // SAFETY: the kernel only modifies the given u32 integer.
-    unsafe { vm_sockets_get_local_cid(f.as_raw_fd(), &mut ret) }?;
-    Ok(ret)
-}
-
 fn main() {
     if let Err(e) = try_main() {
         error!("failed with {:?}", e);
@@ -242,14 +220,13 @@
     info!("executing main task {:?}...", task);
     let mut command = build_command(task)?;
 
-    let local_cid = get_local_cid()?;
     info!("notifying payload started");
-    service.notifyPayloadStarted(local_cid as i32)?;
+    service.notifyPayloadStarted()?;
 
     let exit_status = command.spawn()?.wait()?;
     if let Some(code) = exit_status.code() {
         info!("notifying payload finished");
-        service.notifyPayloadFinished(local_cid as i32, code)?;
+        service.notifyPayloadFinished(code)?;
 
         if code == 0 {
             info!("task successfully finished");