| /* |
| Copyright 2016 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 sysctl |
| |
| import ( |
| "strings" |
| ) |
| |
| // Namespace represents a kernel namespace name. |
| type Namespace string |
| |
| const ( |
| // the Linux IPC namespace |
| IpcNamespace = Namespace("ipc") |
| |
| // the network namespace |
| NetNamespace = Namespace("net") |
| |
| // the zero value if no namespace is known |
| UnknownNamespace = Namespace("") |
| ) |
| |
| var namespaces = map[string]Namespace{ |
| "kernel.sem": IpcNamespace, |
| } |
| |
| var prefixNamespaces = map[string]Namespace{ |
| "kernel.shm": IpcNamespace, |
| "kernel.msg": IpcNamespace, |
| "fs.mqueue.": IpcNamespace, |
| "net.": NetNamespace, |
| } |
| |
| // NamespacedBy returns the namespace of the Linux kernel for a sysctl, or |
| // UnknownNamespace if the sysctl is not known to be namespaced. |
| func NamespacedBy(val string) Namespace { |
| if ns, found := namespaces[val]; found { |
| return ns |
| } |
| for p, ns := range prefixNamespaces { |
| if strings.HasPrefix(val, p) { |
| return ns |
| } |
| } |
| return UnknownNamespace |
| } |