Exemplo n.º 1
0
func (devices *DeviceSet) createRegisterDevice(hash string) (*DevInfo, error) {
	deviceId, err := devices.getNextFreeDeviceId()
	if err != nil {
		return nil, err
	}

	if err := devices.openTransaction(hash, deviceId); err != nil {
		log.Debugf("Error opening transaction hash = %s deviceId = %d", hash, deviceId)
		devices.markDeviceIdFree(deviceId)
		return nil, err
	}

	for {
		if err := devicemapper.CreateDevice(devices.getPoolDevName(), deviceId); err != nil {
			if devicemapper.DeviceIdExists(err) {
				// Device Id already exists. This should not
				// happen. Now we have a mechianism to find
				// a free device Id. So something is not right.
				// Give a warning and continue.
				log.Errorf("Warning: Device Id %d exists in pool but it is supposed to be unused", deviceId)
				deviceId, err = devices.getNextFreeDeviceId()
				if err != nil {
					return nil, err
				}
				// Save new device id into transaction
				devices.refreshTransaction(deviceId)
				continue
			}
			log.Debugf("Error creating device: %s", err)
			devices.markDeviceIdFree(deviceId)
			return nil, err
		}
		break
	}

	log.Debugf("Registering device (id %v) with FS size %v", deviceId, devices.baseFsSize)
	info, err := devices.registerDevice(deviceId, hash, devices.baseFsSize, devices.OpenTransactionId)
	if err != nil {
		_ = devicemapper.DeleteDevice(devices.getPoolDevName(), deviceId)
		devices.markDeviceIdFree(deviceId)
		return nil, err
	}

	if err := devices.closeTransaction(); err != nil {
		devices.unregisterDevice(deviceId, hash)
		devicemapper.DeleteDevice(devices.getPoolDevName(), deviceId)
		devices.markDeviceIdFree(deviceId)
		return nil, err
	}
	return info, nil
}
Exemplo n.º 2
0
func (devices *DeviceSet) AddDevice(hash, baseHash string) error {
	baseInfo, err := devices.lookupDevice(baseHash)
	if err != nil {
		return err
	}

	baseInfo.lock.Lock()
	defer baseInfo.lock.Unlock()

	devices.Lock()
	defer devices.Unlock()

	if info, _ := devices.lookupDevice(hash); info != nil {
		return fmt.Errorf("device %s already exists", hash)
	}

	deviceId := devices.NextDeviceId

	if err := devicemapper.CreateSnapDevice(devices.getPoolDevName(), &deviceId, baseInfo.Name(), baseInfo.DeviceId); err != nil {
		log.Debugf("Error creating snap device: %s", err)
		return err
	}

	// Ids are 24bit, so wrap around
	devices.NextDeviceId = (deviceId + 1) & 0xffffff

	if _, err := devices.registerDevice(deviceId, hash, baseInfo.Size); err != nil {
		devicemapper.DeleteDevice(devices.getPoolDevName(), deviceId)
		log.Debugf("Error registering device: %s", err)
		return err
	}
	return nil
}
Exemplo n.º 3
0
func (d *Driver) DeleteSnapshot(id, volumeID string) error {
	snapshot, volume, err := d.getSnapshotAndVolume(id, volumeID)
	if err != nil {
		return err
	}

	log.WithFields(logrus.Fields{
		LOG_FIELD_REASON:   LOG_REASON_START,
		LOG_FIELD_EVENT:    LOG_EVENT_REMOVE,
		LOG_FIELD_OBJECT:   LOG_OBJECT_SNAPSHOT,
		LOG_FIELD_SNAPSHOT: id,
		LOG_FIELD_VOLUME:   volumeID,
	}).Debugf("Deleting snapshot for volume")
	err = devicemapper.DeleteDevice(d.ThinpoolDevice, snapshot.DevID)
	if err != nil {
		return err
	}
	log.Debug("Deleted snapshot device")
	delete(volume.Snapshots, id)

	if err = util.ObjectSave(volume); err != nil {
		return err
	}
	return nil
}
Exemplo n.º 4
0
func (d *Driver) DeleteVolume(id string) error {
	var err error
	volume := d.loadVolume(id)
	if volume == nil {
		return generateError(logrus.Fields{
			LOG_FIELD_VOLUME: id,
		}, "cannot find volume")
	}
	if len(volume.Snapshots) != 0 {
		for snapshotUUID := range volume.Snapshots {
			if err = d.DeleteSnapshot(snapshotUUID, volume.UUID); err != nil {
				return generateError(logrus.Fields{
					LOG_FIELD_VOLUME:   volume.UUID,
					LOG_FIELD_SNAPSHOT: snapshotUUID,
				}, "cannot remove an snapshot of volume, as part of deletion of volume")
			}
		}
	}

	if err = devicemapper.RemoveDevice(id); err != nil {
		return err
	}

	log.WithFields(logrus.Fields{
		LOG_FIELD_REASON:          LOG_REASON_START,
		LOG_FIELD_EVENT:           LOG_EVENT_REMOVE,
		LOG_FIELD_OBJECT:          LOG_OBJECT_VOLUME,
		LOG_FIELD_VOLUME:          id,
		DM_LOG_FIELD_VOLUME_DEVID: volume.DevID,
	}).Debugf("Deleting device")
	err = devicemapper.DeleteDevice(d.ThinpoolDevice, volume.DevID)
	if err != nil {
		return err
	}

	if volume.Base != "" {
		image := d.loadImage(volume.Base)
		if image == nil {
			return generateError(logrus.Fields{
				LOG_FIELD_IMAGE: volume.Base,
			}, "Cannot find volume's base image")
		}
		if _, exists := image.VolumeRef[volume.UUID]; !exists {
			return generateError(logrus.Fields{
				LOG_FIELD_IMAGE:  volume.Base,
				LOG_FIELD_VOLUME: volume.UUID,
			}, "Volume's base image doesn't refer volumev")
		}
		delete(image.VolumeRef, volume.UUID)
	}

	if err := d.deleteVolume(id); err != nil {
		return err
	}
	return nil
}
Exemplo n.º 5
0
func (devices *DeviceSet) setupBaseImage() error {
	oldInfo, _ := devices.lookupDevice("")
	if oldInfo != nil && oldInfo.Initialized {
		return nil
	}

	if oldInfo != nil && !oldInfo.Initialized {
		log.Debugf("Removing uninitialized base image")
		if err := devices.deleteDevice(oldInfo); err != nil {
			return err
		}
	}

	log.Debugf("Initializing base device-manager snapshot")

	id := devices.NextDeviceId

	// Create initial device
	if err := devicemapper.CreateDevice(devices.getPoolDevName(), &id); err != nil {
		return err
	}

	// Ids are 24bit, so wrap around
	devices.NextDeviceId = (id + 1) & 0xffffff

	log.Debugf("Registering base device (id %v) with FS size %v", id, devices.baseFsSize)
	info, err := devices.registerDevice(id, "", devices.baseFsSize)
	if err != nil {
		_ = devicemapper.DeleteDevice(devices.getPoolDevName(), id)
		return err
	}

	log.Debugf("Creating filesystem on base device-manager snapshot")

	if err = devices.activateDeviceIfNeeded(info); err != nil {
		return err
	}

	if err := devices.createFilesystem(info); err != nil {
		return err
	}

	info.Initialized = true
	if err = devices.saveMetadata(info); err != nil {
		info.Initialized = false
		return err
	}

	return nil
}
Exemplo n.º 6
0
func (d *Driver) DeleteVolume(req Request) error {
	var err error

	d.mutex.Lock()
	defer d.mutex.Unlock()

	id := req.Name

	volume := d.blankVolume(id)
	if err := util.ObjectLoad(volume); err != nil {
		return err
	}

	if volume.MountPoint != "" {
		return fmt.Errorf("Cannot delete volume %s, it hasn't been umounted", id)
	}
	if len(volume.Snapshots) != 0 {
		for snapshotID := range volume.Snapshots {
			if err = d.deleteSnapshot(snapshotID, volume.Name); err != nil {
				return generateError(logrus.Fields{
					LOG_FIELD_VOLUME:   volume.Name,
					LOG_FIELD_SNAPSHOT: snapshotID,
				}, "cannot remove an snapshot of volume, as part of deletion of volume")
			}
		}
	}

	if err = d.removeDevice(id); err != nil {
		return err
	}

	log.WithFields(logrus.Fields{
		LOG_FIELD_REASON:          LOG_REASON_START,
		LOG_FIELD_EVENT:           LOG_EVENT_REMOVE,
		LOG_FIELD_OBJECT:          LOG_OBJECT_VOLUME,
		LOG_FIELD_VOLUME:          id,
		DM_LOG_FIELD_VOLUME_DEVID: volume.DevID,
	}).Debugf("Deleting device")
	err = devicemapper.DeleteDevice(d.ThinpoolDevice, volume.DevID)
	if err != nil {
		return err
	}

	if err := util.ObjectDelete(volume); err != nil {
		return err
	}
	return nil
}
Exemplo n.º 7
0
func (devices *DeviceSet) deleteDevice(info *DevInfo) error {
	if devices.doBlkDiscard {
		// This is a workaround for the kernel not discarding block so
		// on the thin pool when we remove a thinp device, so we do it
		// manually
		if err := devices.activateDeviceIfNeeded(info); err == nil {
			if err := devicemapper.BlockDeviceDiscard(info.DevName()); err != nil {
				log.Debugf("Error discarding block on device: %s (ignoring)", err)
			}
		}
	}

	devinfo, _ := devicemapper.GetInfo(info.Name())
	if devinfo != nil && devinfo.Exists != 0 {
		if err := devices.removeDeviceAndWait(info.Name()); err != nil {
			log.Debugf("Error removing device: %s", err)
			return err
		}
	}

	if err := devices.openTransaction(info.Hash, info.DeviceId); err != nil {
		log.Debugf("Error opening transaction hash = %s deviceId = %d", "", info.DeviceId)
		return err
	}

	if err := devicemapper.DeleteDevice(devices.getPoolDevName(), info.DeviceId); err != nil {
		log.Debugf("Error deleting device: %s", err)
		return err
	}

	if err := devices.unregisterDevice(info.DeviceId, info.Hash); err != nil {
		return err
	}

	if err := devices.closeTransaction(); err != nil {
		return err
	}

	devices.markDeviceIdFree(info.DeviceId)

	return nil
}
Exemplo n.º 8
0
func (devices *DeviceSet) deleteDevice(info *DevInfo) error {
	if devices.doBlkDiscard {
		// This is a workaround for the kernel not discarding block so
		// on the thin pool when we remove a thinp device, so we do it
		// manually
		if err := devices.activateDeviceIfNeeded(info); err == nil {
			if err := devicemapper.BlockDeviceDiscard(info.DevName()); err != nil {
				log.Debugf("Error discarding block on device: %s (ignoring)", err)
			}
		}
	}

	devinfo, _ := devicemapper.GetInfo(info.Name())
	if devinfo != nil && devinfo.Exists != 0 {
		if err := devices.removeDeviceAndWait(info.Name()); err != nil {
			log.Debugf("Error removing device: %s", err)
			return err
		}
	}

	if err := devicemapper.DeleteDevice(devices.getPoolDevName(), info.DeviceId); err != nil {
		log.Debugf("Error deleting device: %s", err)
		return err
	}

	devices.allocateTransactionId()
	devices.devicesLock.Lock()
	delete(devices.Devices, info.Hash)
	devices.devicesLock.Unlock()

	if err := devices.removeMetadata(info); err != nil {
		devices.devicesLock.Lock()
		devices.Devices[info.Hash] = info
		devices.devicesLock.Unlock()
		log.Debugf("Error removing meta data: %s", err)
		return err
	}

	return nil
}
Exemplo n.º 9
0
func (devices *DeviceSet) rollbackTransaction() error {
	log.Debugf("Rolling back open transaction: TransactionId=%d hash=%s device_id=%d", devices.OpenTransactionId, devices.DeviceIdHash, devices.DeviceId)

	// A device id might have already been deleted before transaction
	// closed. In that case this call will fail. Just leave a message
	// in case of failure.
	if err := devicemapper.DeleteDevice(devices.getPoolDevName(), devices.DeviceId); err != nil {
		log.Errorf("Warning: Unable to delete device: %s", err)
	}

	dinfo := &DevInfo{Hash: devices.DeviceIdHash}
	if err := devices.removeMetadata(dinfo); err != nil {
		log.Errorf("Warning: Unable to remove meta data: %s", err)
	} else {
		devices.markDeviceIdFree(devices.DeviceId)
	}

	if err := devices.removeTransactionMetaData(); err != nil {
		log.Errorf("Warning: Unable to remove transaction meta file %s: %s", devices.transactionMetaFile(), err)
	}

	return nil
}
Exemplo n.º 10
0
func (d *Driver) CreateVolume(id string, opts map[string]string) error {
	var (
		size int64
		err  error
	)
	backupURL := opts[convoydriver.OPT_BACKUP_URL]
	if backupURL != "" {
		objVolume, err := objectstore.LoadVolume(backupURL)
		if err != nil {
			return err
		}
		if objVolume.Driver != d.Name() {
			return fmt.Errorf("Cannot restore backup of %v to %v", objVolume.Driver, d.Name())
		}
		size, err = d.getSize(opts, objVolume.Size)
		if err != nil {
			return err
		}
		if size != objVolume.Size {
			return fmt.Errorf("Volume size must match with backup's size")
		}
	} else {
		size, err = d.getSize(opts, d.DefaultVolumeSize)
		if err != nil {
			return err
		}
	}

	if size%(d.ThinpoolBlockSize*SECTOR_SIZE) != 0 {
		return fmt.Errorf("Size must be multiple of block size")

	}
	volume := d.blankVolume(id)
	exists, err := util.ObjectExists(volume)
	if err != nil {
		return err
	}
	if exists {
		return generateError(logrus.Fields{
			LOG_FIELD_VOLUME: id,
		}, "Already has volume with specific uuid")
	}

	devID, err := d.allocateDevID()
	if err != nil {
		return err
	}
	log.WithFields(logrus.Fields{
		LOG_FIELD_REASON:          LOG_REASON_START,
		LOG_FIELD_EVENT:           LOG_EVENT_CREATE,
		LOG_FIELD_OBJECT:          LOG_OBJECT_VOLUME,
		LOG_FIELD_VOLUME:          id,
		DM_LOG_FIELD_VOLUME_DEVID: devID,
	}).Debugf("Creating volume")
	err = devicemapper.CreateDevice(d.ThinpoolDevice, devID)
	if err != nil {
		return err
	}

	log.WithFields(logrus.Fields{
		LOG_FIELD_REASON:          LOG_REASON_START,
		LOG_FIELD_EVENT:           LOG_EVENT_ACTIVATE,
		LOG_FIELD_OBJECT:          LOG_OBJECT_VOLUME,
		LOG_FIELD_VOLUME:          id,
		DM_LOG_FIELD_VOLUME_DEVID: devID,
	}).Debugf("Activating device for volume")
	err = devicemapper.ActivateDevice(d.ThinpoolDevice, id, devID, uint64(size))
	if err != nil {
		log.WithFields(logrus.Fields{
			LOG_FIELD_REASON:          LOG_REASON_ROLLBACK,
			LOG_FIELD_EVENT:           LOG_EVENT_REMOVE,
			LOG_FIELD_OBJECT:          LOG_OBJECT_VOLUME,
			LOG_FIELD_VOLUME:          id,
			DM_LOG_FIELD_VOLUME_DEVID: devID,
		}).Debugf("Removing device for volume due to fail to activate")
		if err := devicemapper.DeleteDevice(d.ThinpoolDevice, devID); err != nil {
			log.WithFields(logrus.Fields{
				LOG_FIELD_REASON:          LOG_REASON_FAILURE,
				LOG_FIELD_EVENT:           LOG_EVENT_REMOVE,
				LOG_FIELD_OBJECT:          LOG_OBJECT_VOLUME,
				LOG_FIELD_VOLUME:          id,
				DM_LOG_FIELD_VOLUME_DEVID: devID,
			}).Debugf("Failed to remove device")
		}
		return err
	}

	volume.DevID = devID
	volume.Size = size
	volume.Snapshots = make(map[string]Snapshot)
	if err := util.ObjectSave(volume); err != nil {
		return err
	}

	dev, err := d.GetVolumeDevice(id)
	if err != nil {
		return err
	}
	if backupURL == "" {
		// format the device
		if _, err := util.Execute("mkfs", []string{"-t", "ext4", dev}); err != nil {
			return err
		}
	} else {
		if err := objectstore.RestoreDeltaBlockBackup(backupURL, dev); err != nil {
			return err
		}
	}

	return nil
}
Exemplo n.º 11
0
func (d *Driver) CreateVolume(id, baseID string, size int64) error {
	var err error
	if size%(d.ThinpoolBlockSize*SECTOR_SIZE) != 0 {
		return fmt.Errorf("Size must be multiple of block size")

	}
	volume := d.loadVolume(id)
	if volume != nil {
		return generateError(logrus.Fields{
			LOG_FIELD_VOLUME: id,
		}, "Already has volume with specific uuid")
	}

	var image *Image
	if baseID != "" {
		image = d.loadImage(baseID)
		if image == nil {
			return generateError(logrus.Fields{
				LOG_FIELD_IMAGE: baseID,
			}, "Cannot find activated base image")
		}
		if _, err := os.Stat(image.Device); err != nil {
			return generateError(logrus.Fields{
				LOG_FIELD_IMAGE_DEV: image.Device,
			}, "Base image device doesn't exist")
		}
		if size != image.Size {
			return generateError(logrus.Fields{
				LOG_FIELD_IMAGE:  baseID,
				LOG_FIELD_VOLUME: id,
			}, "Volume has different size(%v) than base image(%v)", size, image.Size)
		}
	}

	devID, err := d.allocateDevID()
	if err != nil {
		return err
	}
	log.WithFields(logrus.Fields{
		LOG_FIELD_REASON:          LOG_REASON_START,
		LOG_FIELD_EVENT:           LOG_EVENT_CREATE,
		LOG_FIELD_OBJECT:          LOG_OBJECT_VOLUME,
		LOG_FIELD_VOLUME:          id,
		LOG_FIELD_IMAGE:           baseID,
		DM_LOG_FIELD_VOLUME_DEVID: devID,
	}).Debugf("Creating volume")
	err = devicemapper.CreateDevice(d.ThinpoolDevice, devID)
	if err != nil {
		return err
	}

	log.WithFields(logrus.Fields{
		LOG_FIELD_REASON:          LOG_REASON_START,
		LOG_FIELD_EVENT:           LOG_EVENT_ACTIVATE,
		LOG_FIELD_OBJECT:          LOG_OBJECT_VOLUME,
		LOG_FIELD_VOLUME:          id,
		LOG_FIELD_IMAGE:           baseID,
		DM_LOG_FIELD_VOLUME_DEVID: devID,
	}).Debugf("Activating device for volume")
	if image == nil {
		err = devicemapper.ActivateDevice(d.ThinpoolDevice, id, devID, uint64(size))
	} else {
		err = devicemapper.ActivateDeviceWithExternal(d.ThinpoolDevice, id, devID, uint64(size), image.Device)
	}
	if err != nil {
		log.WithFields(logrus.Fields{
			LOG_FIELD_REASON:          LOG_REASON_ROLLBACK,
			LOG_FIELD_EVENT:           LOG_EVENT_REMOVE,
			LOG_FIELD_OBJECT:          LOG_OBJECT_VOLUME,
			LOG_FIELD_VOLUME:          id,
			LOG_FIELD_IMAGE:           baseID,
			DM_LOG_FIELD_VOLUME_DEVID: devID,
		}).Debugf("Removing device for volume due to fail to activate")
		if err := devicemapper.DeleteDevice(d.ThinpoolDevice, devID); err != nil {
			log.WithFields(logrus.Fields{
				LOG_FIELD_REASON:          LOG_REASON_FAILURE,
				LOG_FIELD_EVENT:           LOG_EVENT_REMOVE,
				LOG_FIELD_OBJECT:          LOG_OBJECT_VOLUME,
				LOG_FIELD_VOLUME:          id,
				LOG_FIELD_IMAGE:           baseID,
				DM_LOG_FIELD_VOLUME_DEVID: devID,
			}).Debugf("Failed to remove device")
		}
		return err
	}

	volume = &Volume{
		UUID:      id,
		DevID:     devID,
		Size:      size,
		Snapshots: make(map[string]Snapshot),
	}
	if image != nil {
		volume.Base = image.UUID
		image.VolumeRef[id] = true
		if err := d.saveImage(image); err != nil {
			return err
		}
	}
	if err := d.saveVolume(volume); err != nil {
		return err
	}
	return nil
}
Exemplo n.º 12
0
func (devices *DeviceSet) setupBaseImage() error {
	oldInfo, _ := devices.lookupDevice("")
	if oldInfo != nil && oldInfo.Initialized {
		return nil
	}

	if oldInfo != nil && !oldInfo.Initialized {
		log.Debugf("Removing uninitialized base image")
		if err := devices.deleteDevice(oldInfo); err != nil {
			return err
		}
	}

	if devices.thinPoolDevice != "" && oldInfo == nil {
		_, transactionId, dataUsed, _, _, _, err := devices.poolStatus()
		if err != nil {
			return err
		}
		if dataUsed != 0 {
			return fmt.Errorf("Unable to take ownership of thin-pool (%s) that already has used data blocks",
				devices.thinPoolDevice)
		}
		if transactionId != 0 {
			return fmt.Errorf("Unable to take ownership of thin-pool (%s) with non-zero transaction Id",
				devices.thinPoolDevice)
		}
	}

	log.Debugf("Initializing base device-mapper thin volume")

	id := devices.NextDeviceId

	// Create initial device
	if err := devicemapper.CreateDevice(devices.getPoolDevName(), &id); err != nil {
		return err
	}

	// Ids are 24bit, so wrap around
	devices.NextDeviceId = (id + 1) & 0xffffff

	log.Debugf("Registering base device (id %v) with FS size %v", id, devices.baseFsSize)
	info, err := devices.registerDevice(id, "", devices.baseFsSize)
	if err != nil {
		_ = devicemapper.DeleteDevice(devices.getPoolDevName(), id)
		return err
	}

	log.Debugf("Creating filesystem on base device-mapper thin volume")

	if err = devices.activateDeviceIfNeeded(info); err != nil {
		return err
	}

	if err := devices.createFilesystem(info); err != nil {
		return err
	}

	info.Initialized = true
	if err = devices.saveMetadata(info); err != nil {
		info.Initialized = false
		return err
	}

	return nil
}