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vmm: Restore the VM in "paused" state

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Because we need to pause the VM before it is snapshot, it should be
restored in a paused state to keep the sequence symmetrical. That's the
reason why the state machine regarding the valid VM's state transition
needed to be updated accordingly.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This commit is contained in:
Sebastien Boeuf 2020-06-22 15:35:27 +02:00 committed by Samuel Ortiz
parent a16414dc87
commit 8a165b5314
1 changed files with 4 additions and 4 deletions
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8
vmm/src/vm.rs
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@ -214,10 +214,10 @@ impl VmState {
fn valid_transition(self, new_state: VmState) -> Result<()> {
match self {
VmState::Created => match new_state {
VmState::Created | VmState::Shutdown | VmState::Paused => {
VmState::Created | VmState::Shutdown => {
Err(Error::InvalidStateTransition(self, new_state))
}
VmState::Running => Ok(()),
VmState::Running | VmState::Paused => Ok(()),
},
VmState::Running => match new_state {
@ -1181,7 +1181,7 @@ impl Snapshottable for Vm {
let current_state = self
.get_state()
.map_err(|e| MigratableError::Restore(anyhow!("Could not get VM state: {:#?}", e)))?;
let new_state = VmState::Running;
let new_state = VmState::Paused;
current_state.valid_transition(new_state).map_err(|e| {
MigratableError::Restore(anyhow!("Could not restore VM state: {:#?}", e))
})?;
@ -1336,7 +1336,7 @@ mod tests {
assert!(state.valid_transition(VmState::Created).is_err());
assert!(state.valid_transition(VmState::Running).is_ok());
assert!(state.valid_transition(VmState::Shutdown).is_err());
assert!(state.valid_transition(VmState::Paused).is_err());
assert!(state.valid_transition(VmState::Paused).is_ok());
}
VmState::Running => {
// Check the transitions from Running