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runtime/device: Refactor hotplugVFIODevice() to have common exit path

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hotplugVFIODevice() has several different paths depending if we're
plugging into a root port or a PCIE<->PCI bridge and if we're using a
regular or mediated VFIO device.

We're going to want some common code on the successful exit path here,
so refactor the function to allow that without duplication.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
David Gibson 2021-04-13 13:52:18 +10:00
parent 8bc71105f4
commit 5c2af3e308
1 changed files with 29 additions and 26 deletions
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55
src/runtime/virtcontainers/qemu.go
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@ -1474,39 +1474,42 @@ func (q *qemu) hotplugVFIODevice(ctx context.Context, device *config.VFIODev, op
switch device.Type {
case config.VFIODeviceNormalType:
return q.qmpMonitorCh.qmp.ExecuteVFIODeviceAdd(q.qmpMonitorCh.ctx, devID, device.BDF, device.Bus, romFile)
err = q.qmpMonitorCh.qmp.ExecuteVFIODeviceAdd(q.qmpMonitorCh.ctx, devID, device.BDF, device.Bus, romFile)
case config.VFIODeviceMediatedType:
if utils.IsAPVFIOMediatedDevice(device.SysfsDev) {
return q.qmpMonitorCh.qmp.ExecuteAPVFIOMediatedDeviceAdd(q.qmpMonitorCh.ctx, device.SysfsDev)
err = q.qmpMonitorCh.qmp.ExecuteAPVFIOMediatedDeviceAdd(q.qmpMonitorCh.ctx, device.SysfsDev)
} else {
err = q.qmpMonitorCh.qmp.ExecutePCIVFIOMediatedDeviceAdd(q.qmpMonitorCh.ctx, devID, device.SysfsDev, "", device.Bus, romFile)
}
default:
return fmt.Errorf("Incorrect VFIO device type found")
}
} else {
addr, bridge, err := q.arch.addDeviceToBridge(ctx, devID, types.PCI)
if err != nil {
return err
}
defer func() {
if err != nil {
q.arch.removeDeviceFromBridge(devID)
}
}()
switch device.Type {
case config.VFIODeviceNormalType:
err = q.qmpMonitorCh.qmp.ExecutePCIVFIODeviceAdd(q.qmpMonitorCh.ctx, devID, device.BDF, addr, bridge.ID, romFile)
case config.VFIODeviceMediatedType:
if utils.IsAPVFIOMediatedDevice(device.SysfsDev) {
err = q.qmpMonitorCh.qmp.ExecuteAPVFIOMediatedDeviceAdd(q.qmpMonitorCh.ctx, device.SysfsDev)
} else {
err = q.qmpMonitorCh.qmp.ExecutePCIVFIOMediatedDeviceAdd(q.qmpMonitorCh.ctx, devID, device.SysfsDev, addr, bridge.ID, romFile)
}
return q.qmpMonitorCh.qmp.ExecutePCIVFIOMediatedDeviceAdd(q.qmpMonitorCh.ctx, devID, device.SysfsDev, "", device.Bus, romFile)
default:
return fmt.Errorf("Incorrect VFIO device type found")
}
}
addr, bridge, err := q.arch.addDeviceToBridge(ctx, devID, types.PCI)
if err != nil {
return err
}
defer func() {
if err != nil {
q.arch.removeDeviceFromBridge(devID)
}
}()
switch device.Type {
case config.VFIODeviceNormalType:
return q.qmpMonitorCh.qmp.ExecutePCIVFIODeviceAdd(q.qmpMonitorCh.ctx, devID, device.BDF, addr, bridge.ID, romFile)
case config.VFIODeviceMediatedType:
if utils.IsAPVFIOMediatedDevice(device.SysfsDev) {
return q.qmpMonitorCh.qmp.ExecuteAPVFIOMediatedDeviceAdd(q.qmpMonitorCh.ctx, device.SysfsDev)
}
return q.qmpMonitorCh.qmp.ExecutePCIVFIOMediatedDeviceAdd(q.qmpMonitorCh.ctx, devID, device.SysfsDev, addr, bridge.ID, romFile)
default:
return fmt.Errorf("Incorrect VFIO device type found")
}
return err
} else {
q.Logger().WithField("dev-id", devID).Info("Start hot-unplug VFIO device")