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66 lines
1.9 KiB
Go
66 lines
1.9 KiB
Go
// Copyright 2014 Google Inc. All Rights Reserved.
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//
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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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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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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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package devicemapper
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import (
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"github.com/google/cadvisor/fs"
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mount "github.com/moby/sys/mountinfo"
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"k8s.io/klog/v2"
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)
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type dmPlugin struct{}
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// NewPlugin creates a new DeviceMapper filesystem plugin.
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func NewPlugin() fs.FsPlugin {
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return &dmPlugin{}
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}
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func (p *dmPlugin) Name() string {
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return "devicemapper"
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}
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// CanHandle returns true if the filesystem type is devicemapper.
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func (p *dmPlugin) CanHandle(fsType string) bool {
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return fsType == "devicemapper"
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}
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// Priority returns 100 - DeviceMapper has higher priority than VFS.
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func (p *dmPlugin) Priority() int {
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return 100
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}
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// GetStats returns filesystem statistics for DeviceMapper thin provisioning.
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func (p *dmPlugin) GetStats(device string, partition fs.PartitionInfo) (*fs.FsStats, error) {
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capacity, free, avail, err := GetDMStats(device, partition.BlockSize)
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if err != nil {
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return nil, err
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}
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klog.V(5).Infof("got devicemapper fs capacity stats: capacity: %v free: %v available: %v", capacity, free, avail)
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return &fs.FsStats{
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Capacity: capacity,
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Free: free,
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Available: avail,
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Type: fs.DeviceMapper,
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}, nil
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}
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// ProcessMount handles DeviceMapper mount processing.
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// For DeviceMapper, no special processing is needed.
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func (p *dmPlugin) ProcessMount(mnt *mount.Info) (bool, *mount.Info, error) {
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return true, mnt, nil
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}
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