| /* |
| 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 ( |
| "io/ioutil" |
| "os" |
| "path/filepath" |
| "strconv" |
| |
| specs "github.com/opencontainers/runtime-spec/specs-go" |
| ) |
| |
| func NewNetCls(root string) *netclsController { |
| return &netclsController{ |
| root: filepath.Join(root, string(NetCLS)), |
| } |
| } |
| |
| type netclsController struct { |
| root string |
| } |
| |
| func (n *netclsController) Name() Name { |
| return NetCLS |
| } |
| |
| func (n *netclsController) Path(path string) string { |
| return filepath.Join(n.root, path) |
| } |
| |
| func (n *netclsController) Create(path string, resources *specs.LinuxResources) error { |
| if err := os.MkdirAll(n.Path(path), defaultDirPerm); err != nil { |
| return err |
| } |
| if resources.Network != nil && resources.Network.ClassID != nil && *resources.Network.ClassID > 0 { |
| return ioutil.WriteFile( |
| filepath.Join(n.Path(path), "net_cls.classid"), |
| []byte(strconv.FormatUint(uint64(*resources.Network.ClassID), 10)), |
| defaultFilePerm, |
| ) |
| } |
| return nil |
| } |