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moby--moby/daemon/graphdriver/devmapper/ioctl.go
Tianon Gravi 89ec17d113 Replace "amd64" build tags with "cgo" as appropriate, and remove where unnecessary
Signed-off-by: Andrew Page <admwiggin@gmail.com>
2014-08-06 17:20:21 -06:00

72 lines
1.7 KiB
Go

// +build linux
package devmapper
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
}