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loopback: use IoctlGetInt/IoctlSetInt from x/sys/unix

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Use IoctlGetInt/IoctlSetInt from golang.org/x/sys/unix (where
applicable) instead of manually reimplementing them.

Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Upstream-commit: bedf09363cb7f2f59bf2b72fea0704351b9f5c8d
Component: engine
This commit is contained in:
Tobias Klauser
2017-07-17 10:37:42 +02:00
parent 62a7e56d34
commit 1490278683
1 changed files with 5 additions and 5 deletions
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components/engine/pkg/loopback/ioctl.go
+5 -5
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@@ -9,15 +9,15 @@ import (
)
func ioctlLoopCtlGetFree(fd uintptr) (int, error) {
index, _, err := unix.Syscall(unix.SYS_IOCTL, fd, LoopCtlGetFree, 0)
if err != 0 {
index, err := unix.IoctlGetInt(int(fd), LoopCtlGetFree)
if err != nil {
return 0, err
}
return int(index), nil
return index, nil
}
func ioctlLoopSetFd(loopFd, sparseFd uintptr) error {
if _, _, err := unix.Syscall(unix.SYS_IOCTL, loopFd, LoopSetFd, sparseFd); err != 0 {
if err := unix.IoctlSetInt(int(loopFd), LoopSetFd, int(sparseFd)); err != nil {
return err
}
return nil
@@ -47,7 +47,7 @@ func ioctlLoopGetStatus64(loopFd uintptr) (*loopInfo64, error) {
}
func ioctlLoopSetCapacity(loopFd uintptr, value int) error {
if _, _, err := unix.Syscall(unix.SYS_IOCTL, loopFd, LoopSetCapacity, uintptr(value)); err != 0 {
if err := unix.IoctlSetInt(int(loopFd), LoopSetCapacity, value); err != nil {
return err
}
return nil