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vmm: "Cleanly" shutdown on SIGTERM

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Write to the exit_evt EventFD which will trigger all the devices and
vCPUs to exit. This is slightly cleaner than just exiting the process as
any temporary files will be removed.

Fixes: #1242

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This commit is contained in:
Rob Bradford 2020-09-30 15:58:06 +01:00 committed by Sebastien Boeuf
parent 8a11ef5ba6
commit 0a4be7ddf5
1 changed files with 17 additions and 5 deletions
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22
vmm/src/vm.rs
View File

@ -314,6 +314,7 @@ pub struct Vm {
#[cfg(feature = "acpi")]
numa_nodes: NumaNodes,
seccomp_action: SeccompAction,
exit_evt: EventFd,
}
impl Vm {
@ -394,6 +395,7 @@ impl Vm {
#[cfg(feature = "acpi")]
numa_nodes,
seccomp_action: seccomp_action.clone(),
exit_evt,
})
}
@ -1257,7 +1259,12 @@ impl Vm {
Ok(self.device_manager.lock().unwrap().counters())
}
fn os_signal_handler(signals: Signals, console_input_clone: Arc<Console>, on_tty: bool) {
fn os_signal_handler(
signals: Signals,
console_input_clone: Arc<Console>,
on_tty: bool,
exit_evt: EventFd,
) {
for signal in signals.forever() {
match signal {
SIGWINCH => {
@ -1271,7 +1278,9 @@ impl Vm {
.set_canon_mode()
.expect("failed to restore terminal mode");
}
std::process::exit((signal != SIGTERM) as i32);
if exit_evt.write(1).is_err() {
std::process::exit(1);
}
}
_ => (),
}
@ -1316,7 +1325,7 @@ impl Vm {
match signals {
Ok(signals) => {
self.signals = Some(signals.clone());
let exit_evt = self.exit_evt.try_clone().map_err(Error::EventFdClone)?;
let on_tty = self.on_tty;
let signal_handler_seccomp_filter =
get_seccomp_filter(&self.seccomp_action, Thread::SignalHandler)
@ -1332,7 +1341,7 @@ impl Vm {
return;
}
Vm::os_signal_handler(signals, console, on_tty);
Vm::os_signal_handler(signals, console, on_tty, exit_evt);
})
.map_err(Error::SignalHandlerSpawn)?,
);
@ -1673,6 +1682,9 @@ impl Snapshottable for Vm {
))
},
)?;
let exit_evt = self.exit_evt.try_clone().map_err(|e| {
MigratableError::Restore(anyhow!("Could not clone exit event fd: {:?}", e))
})?;
self.threads.push(
thread::Builder::new()
@ -1685,7 +1697,7 @@ impl Snapshottable for Vm {
return;
}
Vm::os_signal_handler(signals, console, on_tty)
Vm::os_signal_handler(signals, console, on_tty, exit_evt)
})
.map_err(|e| {
MigratableError::Restore(anyhow!(