73 lines
1.7 KiB
Go
73 lines
1.7 KiB
Go
|
// +build linux
|
||
|
|
|
||
|
|
package devicemapper
|
||
|
|
|
||
|
|
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
|
||
|
|
}
|