| /* |
| Copyright The containerd 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 cgroups |
| |
| import ( |
| "fmt" |
| "io/ioutil" |
| "os" |
| "path/filepath" |
| |
| specs "github.com/opencontainers/runtime-spec/specs-go" |
| ) |
| |
| func NewNetPrio(root string) *netprioController { |
| return &netprioController{ |
| root: filepath.Join(root, string(NetPrio)), |
| } |
| } |
| |
| type netprioController struct { |
| root string |
| } |
| |
| func (n *netprioController) Name() Name { |
| return NetPrio |
| } |
| |
| func (n *netprioController) Path(path string) string { |
| return filepath.Join(n.root, path) |
| } |
| |
| func (n *netprioController) Create(path string, resources *specs.LinuxResources) error { |
| if err := os.MkdirAll(n.Path(path), defaultDirPerm); err != nil { |
| return err |
| } |
| if resources.Network != nil { |
| for _, prio := range resources.Network.Priorities { |
| if err := ioutil.WriteFile( |
| filepath.Join(n.Path(path), "net_prio.ifpriomap"), |
| formatPrio(prio.Name, prio.Priority), |
| defaultFilePerm, |
| ); err != nil { |
| return err |
| } |
| } |
| } |
| return nil |
| } |
| |
| func formatPrio(name string, prio uint32) []byte { |
| return []byte(fmt.Sprintf("%s %d", name, prio)) |
| } |