diff options
Diffstat (limited to 'vendor/github.com/containerd/cgroups/paths.go')
-rw-r--r-- | vendor/github.com/containerd/cgroups/paths.go | 107 |
1 files changed, 0 insertions, 107 deletions
diff --git a/vendor/github.com/containerd/cgroups/paths.go b/vendor/github.com/containerd/cgroups/paths.go deleted file mode 100644 index f45fd4256..000000000 --- a/vendor/github.com/containerd/cgroups/paths.go +++ /dev/null @@ -1,107 +0,0 @@ -/* - 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" - "path/filepath" - - "github.com/pkg/errors" -) - -type Path func(subsystem Name) (string, error) - -func RootPath(subsysem Name) (string, error) { - return "/", nil -} - -// StaticPath returns a static path to use for all cgroups -func StaticPath(path string) Path { - return func(_ Name) (string, error) { - return path, nil - } -} - -// NestedPath will nest the cgroups based on the calling processes cgroup -// placing its child processes inside its own path -func NestedPath(suffix string) Path { - paths, err := parseCgroupFile("/proc/self/cgroup") - if err != nil { - return errorPath(err) - } - return existingPath(paths, suffix) -} - -// PidPath will return the correct cgroup paths for an existing process running inside a cgroup -// This is commonly used for the Load function to restore an existing container -func PidPath(pid int) Path { - p := fmt.Sprintf("/proc/%d/cgroup", pid) - paths, err := parseCgroupFile(p) - if err != nil { - return errorPath(errors.Wrapf(err, "parse cgroup file %s", p)) - } - return existingPath(paths, "") -} - -// ErrControllerNotActive is returned when a controller is not supported or enabled -var ErrControllerNotActive = errors.New("controller is not supported") - -func existingPath(paths map[string]string, suffix string) Path { - // localize the paths based on the root mount dest for nested cgroups - for n, p := range paths { - dest, err := getCgroupDestination(string(n)) - if err != nil { - return errorPath(err) - } - rel, err := filepath.Rel(dest, p) - if err != nil { - return errorPath(err) - } - if rel == "." { - rel = dest - } - paths[n] = filepath.Join("/", rel) - } - return func(name Name) (string, error) { - root, ok := paths[string(name)] - if !ok { - if root, ok = paths[fmt.Sprintf("name=%s", name)]; !ok { - return "", ErrControllerNotActive - } - } - if suffix != "" { - return filepath.Join(root, suffix), nil - } - return root, nil - } -} - -func subPath(path Path, subName string) Path { - return func(name Name) (string, error) { - p, err := path(name) - if err != nil { - return "", err - } - return filepath.Join(p, subName), nil - } -} - -func errorPath(err error) Path { - return func(_ Name) (string, error) { - return "", err - } -} |