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
Sebastiaan van Stijn 686be57d0a
Update to Go 1.17.0, and gofmt with Go 1.17
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
2021-08-24 23:33:27 +02:00

29 lines
633 B
Go

//go:build linux && cgo
// +build linux,cgo
package devicemapper // import "github.com/docker/docker/pkg/devicemapper"
import (
"unsafe"
"golang.org/x/sys/unix"
)
func ioctlBlkGetSize64(fd uintptr) (int64, error) {
var size int64
if _, _, err := unix.Syscall(unix.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 := unix.Syscall(unix.SYS_IOCTL, fd, BlkDiscard, uintptr(unsafe.Pointer(&r[0]))); err != 0 {
return err
}
return nil
}