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| 1 | +/* |
| 2 | + Copyright The containerd Authors. |
| 3 | +
|
| 4 | + Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | + you may not use this file except in compliance with the License. |
| 6 | + You may obtain a copy of the License at |
| 7 | +
|
| 8 | + http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | +
|
| 10 | + Unless required by applicable law or agreed to in writing, software |
| 11 | + distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | + See the License for the specific language governing permissions and |
| 14 | + limitations under the License. |
| 15 | +*/ |
| 16 | + |
| 17 | +package devmapper |
| 18 | + |
| 19 | +import ( |
| 20 | + "fmt" |
| 21 | +) |
| 22 | + |
| 23 | +const ( |
| 24 | + maxDeviceID = 0xffffff // Device IDs are 24-bit numbers |
| 25 | +) |
| 26 | + |
| 27 | +// DeviceState represents current devmapper device state reflected in meta store |
| 28 | +type DeviceState int |
| 29 | + |
| 30 | +const ( |
| 31 | + // Unknown means that device just allocated and no operations were performed |
| 32 | + Unknown DeviceState = iota |
| 33 | + // Creating means that device is going to be created |
| 34 | + Creating |
| 35 | + // Created means that devices successfully created |
| 36 | + Created |
| 37 | + // Activating means that device is going to be activated |
| 38 | + Activating |
| 39 | + // Activated means that device successfully activated |
| 40 | + Activated |
| 41 | + // Suspending means that device is going to be suspended |
| 42 | + Suspending |
| 43 | + // Suspended means that device successfully suspended |
| 44 | + Suspended |
| 45 | + // Resuming means that device is going to be resumed from suspended state |
| 46 | + Resuming |
| 47 | + // Resumed means that device successfully resumed |
| 48 | + Resumed |
| 49 | + // Deactivating means that device is going to be deactivated |
| 50 | + Deactivating |
| 51 | + // Deactivated means that device successfully deactivated |
| 52 | + Deactivated |
| 53 | + // Removing means that device is going to be removed |
| 54 | + Removing |
| 55 | + // Removed means that device successfully removed but not yet deleted from meta store |
| 56 | + Removed |
| 57 | +) |
| 58 | + |
| 59 | +func (s DeviceState) String() string { |
| 60 | + switch s { |
| 61 | + case Creating: |
| 62 | + return "Creating" |
| 63 | + case Created: |
| 64 | + return "Created" |
| 65 | + case Activating: |
| 66 | + return "Activating" |
| 67 | + case Activated: |
| 68 | + return "Activated" |
| 69 | + case Suspending: |
| 70 | + return "Suspending" |
| 71 | + case Suspended: |
| 72 | + return "Suspended" |
| 73 | + case Resuming: |
| 74 | + return "Resuming" |
| 75 | + case Resumed: |
| 76 | + return "Resumed" |
| 77 | + case Deactivating: |
| 78 | + return "Deactivating" |
| 79 | + case Deactivated: |
| 80 | + return "Deactivated" |
| 81 | + case Removing: |
| 82 | + return "Removing" |
| 83 | + case Removed: |
| 84 | + return "Removed" |
| 85 | + default: |
| 86 | + return fmt.Sprintf("unknown %d", s) |
| 87 | + } |
| 88 | +} |
| 89 | + |
| 90 | +// DeviceInfo represents metadata for thin device within thin-pool |
| 91 | +type DeviceInfo struct { |
| 92 | + // DeviceID is a 24-bit number assigned to a device within thin-pool device |
| 93 | + DeviceID uint32 `json:"device_id"` |
| 94 | + // Size is a thin device size |
| 95 | + Size uint64 `json:"size"` |
| 96 | + // Name is a device name to be used in /dev/mapper/ |
| 97 | + Name string `json:"name"` |
| 98 | + // ParentName is a name of parent device (if snapshot) |
| 99 | + ParentName string `json:"parent_name"` |
| 100 | + // State represents current device state |
| 101 | + State DeviceState `json:"state"` |
| 102 | + // Error details if device state change failed |
| 103 | + Error string `json:"error"` |
| 104 | +} |
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