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//go:build linux
/*
Copyright The containerd 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 devmapper
import (
"fmt"
)
const (
maxDeviceID = 0xffffff // Device IDs are 24-bit numbers
)
// DeviceState represents current devmapper device state reflected in meta store
type DeviceState int
const (
// Unknown means that device just allocated and no operations were performed
Unknown DeviceState = iota
// Creating means that device is going to be created
Creating
// Created means that devices successfully created
Created
// Activating means that device is going to be activated
Activating
// Activated means that device successfully activated
Activated
// Suspending means that device is going to be suspended
Suspending
// Suspended means that device successfully suspended
Suspended
// Resuming means that device is going to be resumed from suspended state
Resuming
// Resumed means that device successfully resumed
Resumed
// Deactivating means that device is going to be deactivated
Deactivating
// Deactivated means that device successfully deactivated
Deactivated
// Removing means that device is going to be removed
Removing
// Removed means that device successfully removed but not yet deleted from meta store
Removed
// Faulty means that the device is errored and the snapshotter failed to rollback it
Faulty
)
func (s DeviceState) String() string {
switch s {
case Creating:
return "Creating"
case Created:
return "Created"
case Activating:
return "Activating"
case Activated:
return "Activated"
case Suspending:
return "Suspending"
case Suspended:
return "Suspended"
case Resuming:
return "Resuming"
case Resumed:
return "Resumed"
case Deactivating:
return "Deactivating"
case Deactivated:
return "Deactivated"
case Removing:
return "Removing"
case Removed:
return "Removed"
case Faulty:
return "Faulty"
default:
return fmt.Sprintf("unknown %d", s)
}
}
// DeviceInfo represents metadata for thin device within thin-pool
type DeviceInfo struct {
// DeviceID is a 24-bit number assigned to a device within thin-pool device
DeviceID uint32 `json:"device_id"`
// Size is a thin device size
Size uint64 `json:"size"`
// Name is a device name to be used in /dev/mapper/
Name string `json:"name"`
// ParentName is a name of parent device (if snapshot)
ParentName string `json:"parent_name"`
// State represents current device state
State DeviceState `json:"state"`
// Error details if device state change failed
Error string `json:"error"`
}
|
