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// Copyright 2022 Canonical Ltd.
// Licensed under the LGPLv3 with static-linking exception.
// See LICENCE file for details.
package linux
import (
"os"
"path/filepath"
efi "github.com/canonical/go-efilib"
)
var (
hvVendorGuid = efi.MakeGUID(0x9b17e5a2, 0x0891, 0x42dd, 0xb653, [...]uint8{0x80, 0xb5, 0xc2, 0x28, 0x09, 0xba})
hvSCSIGuid = efi.MakeGUID(0xba6163d9, 0x04a1, 0x4d29, 0xb605, [...]uint8{0x72, 0xe2, 0xff, 0xb1, 0xdc, 0x7f})
)
func handleHVDevicePathNode(state *devicePathBuilderState) error {
component := state.PeekUnhandledSysfsComponents(1)
deviceId, err := efi.DecodeGUIDString(component)
if err != nil {
return err
}
state.AdvanceSysfsPath(1)
path := state.SysfsPath()
classIdStr, err := os.ReadFile(filepath.Join(path, "class_id"))
if err != nil {
return err
}
classId, err := efi.DecodeGUIDString(string(classIdStr))
if err != nil {
return err
}
switch classId {
case hvSCSIGuid:
state.Interface = interfaceTypeSCSI
default:
return errUnsupportedDevice("unhandled device class: " + classId.String())
}
data := make([]byte, len(deviceId)+len(classId))
copy(data, classId[:])
copy(data[len(classId):], deviceId[:])
state.Path = append(state.Path, &efi.VendorDevicePathNode{
Type: efi.HardwareDevicePath,
GUID: hvVendorGuid,
Data: data})
return nil
}
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