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qmp: wait for POWERDOWN event in ExecuteSystemPowerdown()

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ExecuteSystemPowerdown issues `system_powerdown` and waits
for `SHUTDOWN`. The event emitted is `POWERDOWN` per spec.

Without this we get an error even though the VM has shutdown
gracefully.

Per QEMU spec:

```

POWERDOWN (Event)

Emitted when the virtual machine is powered down through the power
control system, such as via ACPI.

Since

0.12

Example

<- { "event": "POWERDOWN",
     "timestamp": { "seconds": 1267040730, "microseconds": 682951 } }

SHUTDOWN (Event)

Emitted when the virtual machine has shut down, indicating that qemu is
about to exit.

Arguments

guest: boolean
If true, the shutdown was triggered by a guest request (such as a
guest-initiated ACPI shutdown request or other hardware-specific action)
rather than a host request (such as sending qemu a SIGINT). (since 2.10)
reason: ShutdownCause
The ShutdownCause which resulted in the SHUTDOWN. (since 4.0)
Note

If the command-line option “-no-shutdown” has been specified, qemu will
not exit, and a STOP event will eventually follow the SHUTDOWN event

Since

0.12

Example

<- { "event": "SHUTDOWN", "data": { "guest": true },
     "timestamp": { "seconds": 1267040730, "microseconds": 682951 } }

```

Signed-off-by: Manohar Castelino <mcastelino@apple.com>
This commit is contained in:
Manohar Castelino 2021-09-02 15:42:22 -07:00
parent 2f8e417bb2
commit 1ed52714c0
2 changed files with 2 additions and 2 deletions
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2
qemu/qmp.go
View File

@ -761,7 +761,7 @@ func (q *QMP) ExecuteCont(ctx context.Context) error {
// This function will block until the SHUTDOWN event is received.
func (q *QMP) ExecuteSystemPowerdown(ctx context.Context) error {
filter := &qmpEventFilter{
eventName: "SHUTDOWN",
eventName: "POWERDOWN",
}
return q.executeCommand(ctx, "system_powerdown", nil, filter)
}

2
qemu/qmp_test.go
View File

@ -802,7 +802,7 @@ func TestQMPSystemPowerdown(t *testing.T) {
disconnectedCh := make(chan struct{})
buf := newQMPTestCommandBuffer(t)
buf.AddCommand("system_powerdown", nil, "return", nil)
buf.AddEvent("SHUTDOWN", time.Millisecond*100,
buf.AddEvent("POWERDOWN", time.Millisecond*100,
nil,
map[string]interface{}{
"seconds": seconds,