testWorkRootDir := getEnv("TEST_WORK_ROOTDIR", "/tmp")

	tempCNIConfDir := mktemp(testWorkRootDir, "cni-conf-", t)
	defer rmDir(tempCNIConfDir, t)
	tempCNIBinDir := mktemp(testWorkRootDir, "cni-bin-", t)
	defer rmDir(tempCNIBinDir, t)
	tempK8sSvcAcctDir := mktemp(testWorkRootDir, "kube-svcacct-", t)
	defer rmDir(tempK8sSvcAcctDir, t)

	populateTempDirs(wd, cniConfDirOrderedFiles, tempCNIConfDir, tempK8sSvcAcctDir, t)

	clnt, err := f.getMinIOClient()
	if err != nil {
		return err
	}

	switch r.Method {
	case "Setstat", "Rename", "Link", "Symlink":
		return sftp.ErrSSHFxOpUnsupported

	case "Rmdir":
		bucket, prefix := path2BucketObject(r.Filepath)
		if bucket == "" {
			return errors.New("deleting all buckets not allowed")
		}

		cctx, cancel := context.WithCancel(context.Background())
		defer cancel()

			readdir(path, callback) { callback(enosys()); },
			readlink(path, callback) { callback(enosys()); },
			rename(from, to, callback) { callback(enosys()); },
			rmdir(path, callback) { callback(enosys()); },
			stat(path, callback) { callback(enosys()); },
			symlink(path, link, callback) { callback(enosys()); },
			truncate(path, length, callback) { callback(enosys()); },