/* Copyright 2017 The Kubernetes Authors. Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. */ package checkpoint import ( "encoding/json" "k8s.io/kubernetes/pkg/kubelet/checkpointmanager" "k8s.io/kubernetes/pkg/kubelet/checkpointmanager/checksum" ) // DeviceManagerCheckpoint defines the operations to retrieve pod devices type DeviceManagerCheckpoint interface { checkpointmanager.Checkpoint GetData() ([]PodDevicesEntry, map[string][]string) } // PodDevicesEntry connects pod information to devices type PodDevicesEntry struct { PodUID string ContainerName string ResourceName string DeviceIDs []string AllocResp []byte } // checkpointData struct is used to store pod to device allocation information // in a checkpoint file. // TODO: add version control when we need to change checkpoint format. type checkpointData struct { PodDeviceEntries []PodDevicesEntry RegisteredDevices map[string][]string } // Data holds checkpoint data and its checksum type Data struct { Data checkpointData Checksum checksum.Checksum } // New returns an instance of Checkpoint func New(devEntries []PodDevicesEntry, devices map[string][]string) DeviceManagerCheckpoint { return &Data{ Data: checkpointData{ PodDeviceEntries: devEntries, RegisteredDevices: devices, }, } } // MarshalCheckpoint returns marshalled data func (cp *Data) MarshalCheckpoint() ([]byte, error) { cp.Checksum = checksum.New(cp.Data) return json.Marshal(*cp) } // UnmarshalCheckpoint returns unmarshalled data func (cp *Data) UnmarshalCheckpoint(blob []byte) error { return json.Unmarshal(blob, cp) } // VerifyChecksum verifies that passed checksum is same as calculated checksum func (cp *Data) VerifyChecksum() error { return cp.Checksum.Verify(cp.Data) } // GetData returns device entries and registered devices func (cp *Data) GetData() ([]PodDevicesEntry, map[string][]string) { return cp.Data.PodDeviceEntries, cp.Data.RegisteredDevices }