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