vendor: add safchain/ethtool
This commit is contained in:
Dan Williams
Gabriel Rosenhouse
parent
dd8ff8a5cf
commit
8da8088d43
4
Godeps/Godeps.json
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4
Godeps/Godeps.json
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@ -226,6 +226,10 @@
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"Comment": "v1.0-71-g2152b45",
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"Rev": "2152b45fa28a361beba9aab0885972323a444e28"
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},
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{
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"ImportPath": "github.com/safchain/ethtool",
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"Rev": "7ff1ba29eca231991280817541cb3903f6be15d1"
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},
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{
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"ImportPath": "github.com/vishvananda/netlink",
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"Rev": "6e453822d85ef5721799774b654d4d02fed62afb"
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240
vendor/github.com/safchain/ethtool/ethtool.go
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vendored
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240
vendor/github.com/safchain/ethtool/ethtool.go
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vendored
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@ -0,0 +1,240 @@
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/*
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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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"bytes"
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"fmt"
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"syscall"
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"unsafe"
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)
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// Maximum size of an interface name
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const (
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IFNAMSIZ = 16
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)
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// ioctl ethtool request
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const (
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SIOCETHTOOL = 0x8946
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)
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// ethtool stats related constants.
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const (
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ETH_GSTRING_LEN = 32
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ETH_SS_STATS = 1
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ETHTOOL_GDRVINFO = 0x00000003
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ETHTOOL_GSTRINGS = 0x0000001b
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ETHTOOL_GSTATS = 0x0000001d
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// other CMDs from ethtool-copy.h of ethtool-3.5 package
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ETHTOOL_GSET = 0x00000001 /* Get settings. */
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ETHTOOL_SSET = 0x00000002 /* Set settings. */
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ETHTOOL_GMSGLVL = 0x00000007 /* Get driver message level */
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ETHTOOL_SMSGLVL = 0x00000008 /* Set driver msg level. */
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)
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// MAX_GSTRINGS maximum number of stats entries that ethtool can
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// retrieve currently.
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const (
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MAX_GSTRINGS = 1000
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)
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type ifreq struct {
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ifr_name [IFNAMSIZ]byte
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ifr_data uintptr
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}
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type ethtoolDrvInfo struct {
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cmd uint32
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driver [32]byte
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version [32]byte
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fw_version [32]byte
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bus_info [32]byte
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erom_version [32]byte
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reserved2 [12]byte
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n_priv_flags uint32
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n_stats uint32
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testinfo_len uint32
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eedump_len uint32
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regdump_len uint32
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}
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type ethtoolGStrings struct {
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cmd uint32
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string_set uint32
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len uint32
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data [MAX_GSTRINGS * ETH_GSTRING_LEN]byte
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}
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type ethtoolStats struct {
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cmd uint32
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n_stats uint32
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data [MAX_GSTRINGS]uint64
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}
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type Ethtool struct {
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fd int
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}
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// DriverName returns the driver name of the given interface.
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func (e *Ethtool) DriverName(intf string) (string, error) {
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info, err := e.getDriverInfo(intf)
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if err != nil {
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return "", err
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}
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return string(bytes.Trim(info.driver[:], "\x00")), nil
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}
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// BusInfo returns the bus info of the given interface.
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func (e *Ethtool) BusInfo(intf string) (string, error) {
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info, err := e.getDriverInfo(intf)
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if err != nil {
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return "", err
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}
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return string(bytes.Trim(info.bus_info[:], "\x00")), nil
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}
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func (e *Ethtool) getDriverInfo(intf string) (ethtoolDrvInfo, error) {
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drvinfo := ethtoolDrvInfo{
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cmd: ETHTOOL_GDRVINFO,
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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(&drvinfo)),
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}
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_, _, ep := syscall.Syscall(syscall.SYS_IOCTL, uintptr(e.fd), SIOCETHTOOL, uintptr(unsafe.Pointer(&ifr)))
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if ep != 0 {
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return ethtoolDrvInfo{}, syscall.Errno(ep)
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}
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return drvinfo, nil
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}
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// Stats retrieves stats of the given interface name.
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func (e *Ethtool) Stats(intf string) (map[string]uint64, error) {
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drvinfo := ethtoolDrvInfo{
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cmd: ETHTOOL_GDRVINFO,
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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(&drvinfo)),
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}
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_, _, ep := syscall.Syscall(syscall.SYS_IOCTL, uintptr(e.fd), SIOCETHTOOL, uintptr(unsafe.Pointer(&ifr)))
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if ep != 0 {
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return nil, syscall.Errno(ep)
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}
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if drvinfo.n_stats*ETH_GSTRING_LEN > MAX_GSTRINGS*ETH_GSTRING_LEN {
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return nil, fmt.Errorf("ethtool currently doesn't support more than %d entries, received %d", MAX_GSTRINGS, drvinfo.n_stats)
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}
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gstrings := ethtoolGStrings{
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cmd: ETHTOOL_GSTRINGS,
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string_set: ETH_SS_STATS,
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len: drvinfo.n_stats,
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data: [MAX_GSTRINGS * ETH_GSTRING_LEN]byte{},
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}
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ifr.ifr_data = uintptr(unsafe.Pointer(&gstrings))
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_, _, ep = syscall.Syscall(syscall.SYS_IOCTL, uintptr(e.fd), SIOCETHTOOL, uintptr(unsafe.Pointer(&ifr)))
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if ep != 0 {
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return nil, syscall.Errno(ep)
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}
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stats := ethtoolStats{
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cmd: ETHTOOL_GSTATS,
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n_stats: drvinfo.n_stats,
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data: [MAX_GSTRINGS]uint64{},
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}
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ifr.ifr_data = uintptr(unsafe.Pointer(&stats))
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_, _, ep = syscall.Syscall(syscall.SYS_IOCTL, uintptr(e.fd), SIOCETHTOOL, uintptr(unsafe.Pointer(&ifr)))
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if ep != 0 {
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return nil, syscall.Errno(ep)
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}
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var result = make(map[string]uint64)
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for i := 0; i != int(drvinfo.n_stats); i++ {
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b := gstrings.data[i*ETH_GSTRING_LEN : i*ETH_GSTRING_LEN+ETH_GSTRING_LEN]
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key := string(bytes.Trim(b, "\x00"))
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result[key] = stats.data[i]
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}
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return result, nil
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}
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func (e *Ethtool) Close() {
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syscall.Close(e.fd)
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}
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func NewEthtool() (*Ethtool, error) {
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fd, _, err := syscall.RawSyscall(syscall.SYS_SOCKET, syscall.AF_INET, syscall.SOCK_DGRAM, syscall.IPPROTO_IP)
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if err != 0 {
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return nil, syscall.Errno(err)
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}
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return &Ethtool{
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fd: int(fd),
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}, nil
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}
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func BusInfo(intf string) (string, error) {
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e, err := NewEthtool()
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if err != nil {
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return "", err
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}
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defer e.Close()
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return e.BusInfo(intf)
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}
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func DriverName(intf string) (string, error) {
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e, err := NewEthtool()
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if err != nil {
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return "", err
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}
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defer e.Close()
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return e.DriverName(intf)
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}
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func Stats(intf string) (map[string]uint64, error) {
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e, err := NewEthtool()
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if err != nil {
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return nil, err
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}
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defer e.Close()
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return e.Stats(intf)
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}
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