1
0
Fork 0
mirror of https://github.com/moby/moby.git synced 2022-11-09 12:21:53 -05:00
moby--moby/pkg/devicemapper/ioctl.go

29 lines
609 B
Go
Raw Normal View History

// +build linux,cgo
2013-11-27 22:12:51 -05:00
package devicemapper // import "github.com/docker/docker/pkg/devicemapper"
2013-11-27 20:44:54 -05:00
import (
"unsafe"
"golang.org/x/sys/unix"
2013-11-27 20:44:54 -05:00
)
func ioctlBlkGetSize64(fd uintptr) (int64, error) {
var size int64
if _, _, err := unix.Syscall(unix.SYS_IOCTL, fd, BlkGetSize64, uintptr(unsafe.Pointer(&size))); err != 0 {
2013-11-27 20:44:54 -05:00
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 := unix.Syscall(unix.SYS_IOCTL, fd, BlkDiscard, uintptr(unsafe.Pointer(&r[0]))); err != 0 {
return err
}
return nil
}