| // +build linux,cgo |
| |
| package loopback |
| |
| import ( |
| "unsafe" |
| |
| "golang.org/x/sys/unix" |
| ) |
| |
| func ioctlLoopCtlGetFree(fd uintptr) (int, error) { |
| index, err := unix.IoctlGetInt(int(fd), LoopCtlGetFree) |
| if err != nil { |
| return 0, err |
| } |
| return index, nil |
| } |
| |
| func ioctlLoopSetFd(loopFd, sparseFd uintptr) error { |
| return unix.IoctlSetInt(int(loopFd), LoopSetFd, int(sparseFd)) |
| } |
| |
| func ioctlLoopSetStatus64(loopFd uintptr, loopInfo *loopInfo64) error { |
| if _, _, err := unix.Syscall(unix.SYS_IOCTL, loopFd, LoopSetStatus64, uintptr(unsafe.Pointer(loopInfo))); err != 0 { |
| return err |
| } |
| return nil |
| } |
| |
| func ioctlLoopClrFd(loopFd uintptr) error { |
| if _, _, err := unix.Syscall(unix.SYS_IOCTL, loopFd, LoopClrFd, 0); err != 0 { |
| return err |
| } |
| return nil |
| } |
| |
| func ioctlLoopGetStatus64(loopFd uintptr) (*loopInfo64, error) { |
| loopInfo := &loopInfo64{} |
| |
| if _, _, err := unix.Syscall(unix.SYS_IOCTL, loopFd, LoopGetStatus64, uintptr(unsafe.Pointer(loopInfo))); err != 0 { |
| return nil, err |
| } |
| return loopInfo, nil |
| } |
| |
| func ioctlLoopSetCapacity(loopFd uintptr, value int) error { |
| return unix.IoctlSetInt(int(loopFd), LoopSetCapacity, value) |
| } |