/
driver_linux.go
126 lines (116 loc) · 3.35 KB
/
driver_linux.go
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// Copyright 2016 The Serviced 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 main
import (
"fmt"
// Need to do btrfs driver initializations
_ "github.com/control-center/serviced/volume/btrfs"
// Need to do rsync driver initializations
_ "github.com/control-center/serviced/volume/rsync"
"errors"
log "github.com/Sirupsen/logrus"
"github.com/control-center/serviced/volume/devicemapper"
"github.com/docker/docker/pkg/parsers"
"strings"
)
var (
ErrMissingThinpoolOption = errors.New("Missing or invalid dm.thinpooldev option specified")
)
// Execute displays orphaned volumes
func (c *CheckOrphans) Execute(args []string) error {
App.initializeLogging()
directory := GetDefaultDriver(string(c.Args.Path))
if err := verifyOptions(App.Options.Options); err != nil {
log.Fatal(err.Error())
}
dmd, err := InitDriverIfExists(directory)
if err != nil {
return err
}
drv, ok := dmd.(*devicemapper.DeviceMapperDriver)
if !ok {
log.Fatal("This only works on devicemapper devices")
}
// we retrieve the list of all devices that CC has access to
var ccDevices []string
for _, v := range drv.ListTenants() {
_vol, err := drv.Get(v)
if err != nil {
return err
}
vol, ok := _vol.(*devicemapper.DeviceMapperVolume)
if !ok {
log.Fatal("Volume", v, "is not of DeviceMapper type.")
}
ccDevices = append(ccDevices, vol.Metadata.CurrentDevice())
for _, dHash := range vol.Metadata.Snapshots {
ccDevices = append(ccDevices, dHash)
}
}
// next we compare CC-visible device hashes to the device hashes stored by the device driver
var orphans []string
for _, d := range drv.DeviceSet.List() {
found := false
for _, c := range ccDevices {
// (*devicemapper.DeviceMapperDriver).DeviceSet.List() will contain an empty string for the base device
if d == c || d == "" {
found = true
break
}
}
if !found {
orphans = append(orphans, d)
}
}
if len(orphans) > 0 {
fmt.Println("Orphaned devices were found")
// delete the actual devices
for _, v := range orphans {
if c.Clean {
if err := drv.DeviceSet.DeleteDevice(v, false); err != nil {
log.WithError(err).Error("An error occurred while attempting to remove the device:")
} else {
fmt.Println("Removed orphaned snapshot", v)
}
} else {
fmt.Println(v)
}
}
} else {
fmt.Println("No orphaned devices found.")
}
return nil
}
func verifyOptions(options []string) error {
thinpooldev := false
for _, option := range options {
key, val, err := parsers.ParseKeyValueOpt(option)
if err != nil {
return err
}
key = strings.ToLower(key)
switch key {
// Currently just checking that the dm.thinpooldev option is set.
case "dm.thinpooldev":
if len(strings.TrimSpace(val)) == 0 {
return ErrMissingThinpoolOption
}
thinpooldev = true
break
}
}
if !thinpooldev {
return ErrMissingThinpoolOption
}
return nil
}