forked from github/multus-cni
d4a30c383d
This change make binary file and directory name consistent. In addition, change the package name cni to server because cni is a bit umbiguous for cni plugin's repository.
70 lines
2.2 KiB
Go
70 lines
2.2 KiB
Go
// Copyright (c) 2021 Multus 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 server
|
|
|
|
import (
|
|
"fmt"
|
|
"os"
|
|
"path/filepath"
|
|
"syscall"
|
|
)
|
|
|
|
const (
|
|
serverSocketName = "multus-cni.sock"
|
|
fullReadWriteExecutePermissions = 0777
|
|
thickPluginSocketRunDirPermissions = 0700
|
|
)
|
|
|
|
// FilesystemPreRequirements ensures the target `rundir` features the correct
|
|
// permissions.
|
|
func FilesystemPreRequirements(rundir string) error {
|
|
socketpath := SocketPath(rundir)
|
|
if err := os.RemoveAll(rundir); err != nil && !os.IsNotExist(err) {
|
|
info, err := os.Stat(rundir)
|
|
if err != nil {
|
|
return fmt.Errorf("failed to stat old pod info socket directory %s: %v", rundir, err)
|
|
}
|
|
// Owner must be root
|
|
tmp := info.Sys()
|
|
statt, ok := tmp.(*syscall.Stat_t)
|
|
if !ok {
|
|
return fmt.Errorf("failed to read pod info socket directory stat info: %T", tmp)
|
|
}
|
|
if statt.Uid != 0 {
|
|
return fmt.Errorf("insecure owner of pod info socket directory %s: %v", rundir, statt.Uid)
|
|
}
|
|
|
|
// Check permissions
|
|
if info.Mode()&fullReadWriteExecutePermissions != thickPluginSocketRunDirPermissions {
|
|
return fmt.Errorf("insecure permissions on pod info socket directory %s: %v", rundir, info.Mode())
|
|
}
|
|
|
|
// Finally remove the socket file so we can re-create it
|
|
if err := os.Remove(socketpath); err != nil && !os.IsNotExist(err) {
|
|
return fmt.Errorf("failed to remove old pod info socket %s: %v", socketpath, err)
|
|
}
|
|
}
|
|
if err := os.MkdirAll(rundir, thickPluginSocketRunDirPermissions); err != nil {
|
|
return fmt.Errorf("failed to create pod info socket directory %s: %v", rundir, err)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// SocketPath returns the path of the multus CNI socket
|
|
func SocketPath(rundir string) string {
|
|
return filepath.Join(rundir, serverSocketName)
|
|
}
|