func NewDevicemapperChecksums(root string) Mounter {
devices, err := devmapper.NewDeviceSet(root, false, nil, nil, nil)
if err != nil {
logrus.Errorf("Can't initialize device mapper: %q", err)
os.Exit(1)
}
return &devicemapper{root: root, devices: devices, mounts: make(map[string]*mount)}
}
func main() {
root := flag.String("r", "/var/lib/docker", "Docker root dir")
flDebug := flag.Bool("D", false, "Debug mode")
flag.Parse()
if *flDebug {
os.Setenv("DEBUG", "1")
}
if flag.NArg() < 1 {
usage()
}
args := flag.Args()
home := path.Join(*root, "devicemapper")
devices, err := devmapper.NewDeviceSet(home, false)
if err != nil {
fmt.Println("Can't initialize device mapper: ", err)
os.Exit(1)
}
switch args[0] {
case "status":
status := devices.Status()
fmt.Printf("Pool name: %s\n", status.PoolName)
fmt.Printf("Data Loopback file: %s\n", status.DataLoopback)
fmt.Printf("Metadata Loopback file: %s\n", status.MetadataLoopback)
fmt.Printf("Sector size: %d\n", status.SectorSize)
fmt.Printf("Data use: %d of %d (%.1f %%)\n", status.Data.Used, status.Data.Total, 100.0*float64(status.Data.Used)/float64(status.Data.Total))
fmt.Printf("Metadata use: %d of %d (%.1f %%)\n", status.Metadata.Used, status.Metadata.Total, 100.0*float64(status.Metadata.Used)/float64(status.Metadata.Total))
break
case "list":
ids := devices.List()
sort.Strings(ids)
for _, id := range ids {
fmt.Println(id)
}
break
case "device":
if flag.NArg() < 2 {
usage()
}
status, err := devices.GetDeviceStatus(args[1])
if err != nil {
fmt.Println("Can't get device info: ", err)
os.Exit(1)
}
fmt.Printf("Id: %d\n", status.DeviceId)
fmt.Printf("Size: %d\n", status.Size)
fmt.Printf("Transaction Id: %d\n", status.TransactionId)
fmt.Printf("Size in Sectors: %d\n", status.SizeInSectors)
fmt.Printf("Mapped Sectors: %d\n", status.MappedSectors)
fmt.Printf("Highest Mapped Sector: %d\n", status.HighestMappedSector)
break
case "resize":
if flag.NArg() < 2 {
usage()
}
size, err := byteSizeFromString(args[1])
if err != nil {
fmt.Println("Invalid size: ", err)
os.Exit(1)
}
err = devices.ResizePool(size)
if err != nil {
fmt.Println("Error resizeing pool: ", err)
os.Exit(1)
}
break
case "snap":
if flag.NArg() < 3 {
usage()
}
err := devices.AddDevice(args[1], args[2])
if err != nil {
fmt.Println("Can't create snap device: ", err)
os.Exit(1)
}
break
case "remove":
if flag.NArg() < 2 {
usage()
}
err := devices.RemoveDevice(args[1])
if err != nil {
fmt.Println("Can't remove device: ", err)
os.Exit(1)
}
break
case "mount":
if flag.NArg() < 3 {
usage()
}
err := devices.MountDevice(args[1], args[2], false)
if err != nil {
fmt.Println("Can't create snap device: ", err)
os.Exit(1)
}
break
default:
fmt.Printf("Unknown command %s\n", args[0])
usage()
os.Exit(1)
}
return
}
