| // +build linux |
| |
| package devicemapper |
| |
| import ( |
| "syscall" |
| "unsafe" |
| ) |
| |
| func ioctlLoopCtlGetFree(fd uintptr) (int, error) { |
| index, _, err := syscall.Syscall(syscall.SYS_IOCTL, fd, LoopCtlGetFree, 0) |
| if err != 0 { |
| return 0, err |
| } |
| return int(index), nil |
| } |
| |
| func ioctlLoopSetFd(loopFd, sparseFd uintptr) error { |
| if _, _, err := syscall.Syscall(syscall.SYS_IOCTL, loopFd, LoopSetFd, sparseFd); err != 0 { |
| return err |
| } |
| return nil |
| } |
| |
| func ioctlLoopSetStatus64(loopFd uintptr, loopInfo *LoopInfo64) error { |
| if _, _, err := syscall.Syscall(syscall.SYS_IOCTL, loopFd, LoopSetStatus64, uintptr(unsafe.Pointer(loopInfo))); err != 0 { |
| return err |
| } |
| return nil |
| } |
| |
| func ioctlLoopClrFd(loopFd uintptr) error { |
| if _, _, err := syscall.Syscall(syscall.SYS_IOCTL, loopFd, LoopClrFd, 0); err != 0 { |
| return err |
| } |
| return nil |
| } |
| |
| func ioctlLoopGetStatus64(loopFd uintptr) (*LoopInfo64, error) { |
| loopInfo := &LoopInfo64{} |
| |
| if _, _, err := syscall.Syscall(syscall.SYS_IOCTL, loopFd, LoopGetStatus64, uintptr(unsafe.Pointer(loopInfo))); err != 0 { |
| return nil, err |
| } |
| return loopInfo, nil |
| } |
| |
| func ioctlLoopSetCapacity(loopFd uintptr, value int) error { |
| if _, _, err := syscall.Syscall(syscall.SYS_IOCTL, loopFd, LoopSetCapacity, uintptr(value)); err != 0 { |
| return err |
| } |
| return nil |
| } |
| |
| func ioctlBlkGetSize64(fd uintptr) (int64, error) { |
| var size int64 |
| if _, _, err := syscall.Syscall(syscall.SYS_IOCTL, fd, BlkGetSize64, uintptr(unsafe.Pointer(&size))); err != 0 { |
| return 0, err |
| } |
| return size, nil |
| } |
| |
| func ioctlBlkDiscard(fd uintptr, offset, length uint64) error { |
| var r [2]uint64 |
| r[0] = offset |
| r[1] = length |
| |
| if _, _, err := syscall.Syscall(syscall.SYS_IOCTL, fd, BlkDiscard, uintptr(unsafe.Pointer(&r[0]))); err != 0 { |
| return err |
| } |
| return nil |
| } |