mirror of https://github.com/k3s-io/k3s
54 lines
1.6 KiB
Go
54 lines
1.6 KiB
Go
/*
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Copyright 2014 Google Inc. All rights reserved.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package gce_pd
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import (
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"github.com/GoogleCloudPlatform/kubernetes/pkg/util/mount"
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)
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// Examines /proc/mounts to find the source device of the PD resource and the
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// number of references to that device. Returns both the full device path under
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// the /dev tree and the number of references.
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func getMountRefCount(mounter mount.Interface, mountPath string) (string, int, error) {
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// TODO(jonesdl) This can be split up into two procedures, finding the device path
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// and finding the number of references. The parsing could also be separated and another
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// utility could determine if a path is an active mount point.
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mps, err := mounter.List()
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if err != nil {
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return "", -1, err
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}
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// Find the device name.
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deviceName := ""
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for i := range mps {
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if mps[i].Path == mountPath {
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deviceName = mps[i].Device
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break
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}
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}
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// Find the number of references to the device.
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refCount := 0
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for i := range mps {
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if mps[i].Device == deviceName {
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refCount++
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}
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}
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return deviceName, refCount, nil
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}
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