57 lines
1.2 KiB
Go
57 lines
1.2 KiB
Go
|
// Copyright 2019 Google LLC
|
||
|
|
//
|
||
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
||
|
|
// you may not use this file except in compliance with the License.
|
||
|
|
// You may obtain a copy of the License at
|
||
|
|
//
|
||
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
||
|
|
//
|
||
|
|
// Unless required by applicable law or agreed to in writing, software
|
||
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
||
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||
|
|
// See the License for the specific language governing permissions and
|
||
|
|
// limitations under the License.
|
||
|
|
|
||
|
|
package sandbox
|
||
|
|
|
||
|
|
import (
|
||
|
|
"syscall"
|
||
|
|
"unsafe"
|
||
|
|
|
||
|
|
"golang.org/x/sys/unix"
|
||
|
|
)
|
||
|
|
|
||
|
|
type ethtoolValue struct {
|
||
|
|
cmd uint32
|
||
|
|
val uint32
|
||
|
|
}
|
||
|
|
|
||
|
|
type ifreq struct {
|
||
|
|
ifrName [unix.IFNAMSIZ]byte
|
||
|
|
ifrData *ethtoolValue
|
||
|
|
}
|
||
|
|
|
||
|
|
const (
|
||
|
|
_ETHTOOL_GGSO = 0x00000023
|
||
|
|
)
|
||
|
|
|
||
|
|
func isGSOEnabled(fd int, intf string) (bool, error) {
|
||
|
|
val := ethtoolValue{
|
||
|
|
cmd: _ETHTOOL_GGSO,
|
||
|
|
}
|
||
|
|
|
||
|
|
var name [unix.IFNAMSIZ]byte
|
||
|
|
copy(name[:], []byte(intf))
|
||
|
|
|
||
|
|
ifr := ifreq{
|
||
|
|
ifrName: name,
|
||
|
|
ifrData: &val,
|
||
|
|
}
|
||
|
|
|
||
|
|
if _, _, err := syscall.Syscall(syscall.SYS_IOCTL, uintptr(fd), unix.SIOCETHTOOL, uintptr(unsafe.Pointer(&ifr))); err != 0 {
|
||
|
|
return false, err
|
||
|
|
}
|
||
|
|
|
||
|
|
return val.val != 0, nil
|
||
|
|
}
|