mirror of https://github.com/containers/podman.git
114 lines
2.9 KiB
Go
114 lines
2.9 KiB
Go
/*
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*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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*
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*/
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// Package ethtool aims to provide a library giving a simple access to the
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// Linux SIOCETHTOOL ioctl operations. It can be used to retrieve informations
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// from a network device like statistics, driver related informations or
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// even the peer of a VETH interface.
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package ethtool
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import (
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"syscall"
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"unsafe"
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)
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type ethtoolValue struct { /* ethtool.c: struct ethtool_value */
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cmd uint32
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data uint32
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}
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// MsglvlGet returns the msglvl of the given interface.
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func (e *Ethtool) MsglvlGet(intf string) (uint32, error) {
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edata := ethtoolValue{
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cmd: ETHTOOL_GMSGLVL,
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}
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var name [IFNAMSIZ]byte
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copy(name[:], []byte(intf))
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ifr := ifreq{
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ifr_name: name,
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ifr_data: uintptr(unsafe.Pointer(&edata)),
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}
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_, _, ep := syscall.Syscall(syscall.SYS_IOCTL, uintptr(e.fd),
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SIOCETHTOOL, uintptr(unsafe.Pointer(&ifr)))
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if ep != 0 {
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return 0, syscall.Errno(ep)
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}
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return edata.data, nil
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}
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// MsglvlSet returns the read-msglvl, post-set-msglvl of the given interface.
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func (e *Ethtool) MsglvlSet(intf string, valset uint32) (uint32, uint32, error) {
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edata := ethtoolValue{
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cmd: ETHTOOL_GMSGLVL,
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}
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var name [IFNAMSIZ]byte
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copy(name[:], []byte(intf))
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ifr := ifreq{
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ifr_name: name,
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ifr_data: uintptr(unsafe.Pointer(&edata)),
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}
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_, _, ep := syscall.Syscall(syscall.SYS_IOCTL, uintptr(e.fd),
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SIOCETHTOOL, uintptr(unsafe.Pointer(&ifr)))
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if ep != 0 {
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return 0, 0, syscall.Errno(ep)
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}
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readval := edata.data
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edata.cmd = ETHTOOL_SMSGLVL
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edata.data = valset
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_, _, ep = syscall.Syscall(syscall.SYS_IOCTL, uintptr(e.fd),
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SIOCETHTOOL, uintptr(unsafe.Pointer(&ifr)))
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if ep != 0 {
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return 0, 0, syscall.Errno(ep)
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}
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return readval, edata.data, nil
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}
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// MsglvlGet returns the msglvl of the given interface.
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func MsglvlGet(intf string) (uint32, error) {
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e, err := NewEthtool()
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if err != nil {
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return 0, err
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}
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defer e.Close()
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return e.MsglvlGet(intf)
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}
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// MsglvlSet returns the read-msglvl, post-set-msglvl of the given interface.
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func MsglvlSet(intf string, valset uint32) (uint32, uint32, error) {
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e, err := NewEthtool()
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if err != nil {
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return 0, 0, err
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}
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defer e.Close()
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return e.MsglvlSet(intf, valset)
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}
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