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qemu/qmp: support hotplug a nic whose qdisc is mq

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If we hotplug a nic with args mq=on, its qdisc will be mq by default.
This aligns with cold plug nics.

Signed-off-by: Ruidong Cao <caoruidong@huawei.com>
This commit is contained in:
Ruidong Cao 2018-08-21 18:48:42 +08:00
parent d8f80cafe3
commit 0286ff9e6e
2 changed files with 15 additions and 2 deletions

15
qemu/qmp.go
View File

@ -793,7 +793,8 @@ func (q *QMP) ExecuteNetdevDel(ctx context.Context, netdevID string) error {
// ExecuteNetPCIDeviceAdd adds a Net PCI device to a QEMU instance
// using the device_add command. devID is the id of the device to add.
// Must be valid QMP identifier. netdevID is the id of nic added by previous netdev_add.
func (q *QMP) ExecuteNetPCIDeviceAdd(ctx context.Context, netdevID, devID, macAddr, addr, bus string) error {
// queues is the number of queues of a nic.
func (q *QMP) ExecuteNetPCIDeviceAdd(ctx context.Context, netdevID, devID, macAddr, addr, bus string, queues int) error {
args := map[string]interface{}{
"id": devID,
"driver": VirtioNetPCI,
@ -805,6 +806,18 @@ func (q *QMP) ExecuteNetPCIDeviceAdd(ctx context.Context, netdevID, devID, macAd
if bus != "" {
args["bus"] = bus
}
if queues > 0 {
// (2N+2 vectors, N for tx queues, N for rx queues, 1 for config, and one for possible control vq)
// -device virtio-net-pci,mq=on,vectors=2N+2...
// enable mq in guest by 'ethtool -L eth0 combined $queue_num'
// Clearlinux automatically sets up the queues properly
// The agent implementation should do this to ensure that it is
// always set
args["mq"] = "on"
args["vectors"] = 2*queues + 2
}
return q.executeCommand(ctx, "device_add", args, nil)
}

2
qemu/qmp_test.go
View File

@ -439,7 +439,7 @@ func TestQMPNetPCIDeviceAdd(t *testing.T) {
cfg := QMPConfig{Logger: qmpTestLogger{}}
q := startQMPLoop(buf, cfg, connectedCh, disconnectedCh)
checkVersion(t, connectedCh)
err := q.ExecuteNetPCIDeviceAdd(context.Background(), "br0", "virtio-0", "02:42:ac:11:00:02", "0x7", "")
err := q.ExecuteNetPCIDeviceAdd(context.Background(), "br0", "virtio-0", "02:42:ac:11:00:02", "0x7", "", 8)
if err != nil {
t.Fatalf("Unexpected error %v", err)
}