mirror of https://github.com/vishvananda/netlink
731 lines
19 KiB
Go
731 lines
19 KiB
Go
package netlink
|
|
|
|
import (
|
|
"fmt"
|
|
"io/ioutil"
|
|
"strconv"
|
|
"strings"
|
|
"syscall"
|
|
|
|
"github.com/vishvananda/netlink/nl"
|
|
"golang.org/x/sys/unix"
|
|
)
|
|
|
|
// NOTE function is here because it uses other linux functions
|
|
func NewNetem(attrs QdiscAttrs, nattrs NetemQdiscAttrs) *Netem {
|
|
var limit uint32 = 1000
|
|
var lossCorr, delayCorr, duplicateCorr uint32
|
|
var reorderProb, reorderCorr uint32
|
|
var corruptProb, corruptCorr uint32
|
|
|
|
latency := nattrs.Latency
|
|
loss := Percentage2u32(nattrs.Loss)
|
|
gap := nattrs.Gap
|
|
duplicate := Percentage2u32(nattrs.Duplicate)
|
|
jitter := nattrs.Jitter
|
|
|
|
// Correlation
|
|
if latency > 0 && jitter > 0 {
|
|
delayCorr = Percentage2u32(nattrs.DelayCorr)
|
|
}
|
|
if loss > 0 {
|
|
lossCorr = Percentage2u32(nattrs.LossCorr)
|
|
}
|
|
if duplicate > 0 {
|
|
duplicateCorr = Percentage2u32(nattrs.DuplicateCorr)
|
|
}
|
|
// FIXME should validate values(like loss/duplicate are percentages...)
|
|
latency = time2Tick(latency)
|
|
|
|
if nattrs.Limit != 0 {
|
|
limit = nattrs.Limit
|
|
}
|
|
// Jitter is only value if latency is > 0
|
|
if latency > 0 {
|
|
jitter = time2Tick(jitter)
|
|
}
|
|
|
|
reorderProb = Percentage2u32(nattrs.ReorderProb)
|
|
reorderCorr = Percentage2u32(nattrs.ReorderCorr)
|
|
|
|
if reorderProb > 0 {
|
|
// ERROR if lantency == 0
|
|
if gap == 0 {
|
|
gap = 1
|
|
}
|
|
}
|
|
|
|
corruptProb = Percentage2u32(nattrs.CorruptProb)
|
|
corruptCorr = Percentage2u32(nattrs.CorruptCorr)
|
|
|
|
return &Netem{
|
|
QdiscAttrs: attrs,
|
|
Latency: latency,
|
|
DelayCorr: delayCorr,
|
|
Limit: limit,
|
|
Loss: loss,
|
|
LossCorr: lossCorr,
|
|
Gap: gap,
|
|
Duplicate: duplicate,
|
|
DuplicateCorr: duplicateCorr,
|
|
Jitter: jitter,
|
|
ReorderProb: reorderProb,
|
|
ReorderCorr: reorderCorr,
|
|
CorruptProb: corruptProb,
|
|
CorruptCorr: corruptCorr,
|
|
}
|
|
}
|
|
|
|
// QdiscDel will delete a qdisc from the system.
|
|
// Equivalent to: `tc qdisc del $qdisc`
|
|
func QdiscDel(qdisc Qdisc) error {
|
|
return pkgHandle.QdiscDel(qdisc)
|
|
}
|
|
|
|
// QdiscDel will delete a qdisc from the system.
|
|
// Equivalent to: `tc qdisc del $qdisc`
|
|
func (h *Handle) QdiscDel(qdisc Qdisc) error {
|
|
return h.qdiscModify(unix.RTM_DELQDISC, 0, qdisc)
|
|
}
|
|
|
|
// QdiscChange will change a qdisc in place
|
|
// Equivalent to: `tc qdisc change $qdisc`
|
|
// The parent and handle MUST NOT be changed.
|
|
func QdiscChange(qdisc Qdisc) error {
|
|
return pkgHandle.QdiscChange(qdisc)
|
|
}
|
|
|
|
// QdiscChange will change a qdisc in place
|
|
// Equivalent to: `tc qdisc change $qdisc`
|
|
// The parent and handle MUST NOT be changed.
|
|
func (h *Handle) QdiscChange(qdisc Qdisc) error {
|
|
return h.qdiscModify(unix.RTM_NEWQDISC, 0, qdisc)
|
|
}
|
|
|
|
// QdiscReplace will replace a qdisc to the system.
|
|
// Equivalent to: `tc qdisc replace $qdisc`
|
|
// The handle MUST change.
|
|
func QdiscReplace(qdisc Qdisc) error {
|
|
return pkgHandle.QdiscReplace(qdisc)
|
|
}
|
|
|
|
// QdiscReplace will replace a qdisc to the system.
|
|
// Equivalent to: `tc qdisc replace $qdisc`
|
|
// The handle MUST change.
|
|
func (h *Handle) QdiscReplace(qdisc Qdisc) error {
|
|
return h.qdiscModify(
|
|
unix.RTM_NEWQDISC,
|
|
unix.NLM_F_CREATE|unix.NLM_F_REPLACE,
|
|
qdisc)
|
|
}
|
|
|
|
// QdiscAdd will add a qdisc to the system.
|
|
// Equivalent to: `tc qdisc add $qdisc`
|
|
func QdiscAdd(qdisc Qdisc) error {
|
|
return pkgHandle.QdiscAdd(qdisc)
|
|
}
|
|
|
|
// QdiscAdd will add a qdisc to the system.
|
|
// Equivalent to: `tc qdisc add $qdisc`
|
|
func (h *Handle) QdiscAdd(qdisc Qdisc) error {
|
|
return h.qdiscModify(
|
|
unix.RTM_NEWQDISC,
|
|
unix.NLM_F_CREATE|unix.NLM_F_EXCL,
|
|
qdisc)
|
|
}
|
|
|
|
func (h *Handle) qdiscModify(cmd, flags int, qdisc Qdisc) error {
|
|
req := h.newNetlinkRequest(cmd, flags|unix.NLM_F_ACK)
|
|
base := qdisc.Attrs()
|
|
msg := &nl.TcMsg{
|
|
Family: nl.FAMILY_ALL,
|
|
Ifindex: int32(base.LinkIndex),
|
|
Handle: base.Handle,
|
|
Parent: base.Parent,
|
|
}
|
|
req.AddData(msg)
|
|
|
|
// When deleting don't bother building the rest of the netlink payload
|
|
if cmd != unix.RTM_DELQDISC {
|
|
if err := qdiscPayload(req, qdisc); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
|
|
_, err := req.Execute(unix.NETLINK_ROUTE, 0)
|
|
return err
|
|
}
|
|
|
|
func qdiscPayload(req *nl.NetlinkRequest, qdisc Qdisc) error {
|
|
|
|
req.AddData(nl.NewRtAttr(nl.TCA_KIND, nl.ZeroTerminated(qdisc.Type())))
|
|
if qdisc.Attrs().IngressBlock != nil {
|
|
req.AddData(nl.NewRtAttr(nl.TCA_INGRESS_BLOCK, nl.Uint32Attr(*qdisc.Attrs().IngressBlock)))
|
|
}
|
|
|
|
options := nl.NewRtAttr(nl.TCA_OPTIONS, nil)
|
|
|
|
switch qdisc := qdisc.(type) {
|
|
case *Prio:
|
|
tcmap := nl.TcPrioMap{
|
|
Bands: int32(qdisc.Bands),
|
|
Priomap: qdisc.PriorityMap,
|
|
}
|
|
options = nl.NewRtAttr(nl.TCA_OPTIONS, tcmap.Serialize())
|
|
case *Tbf:
|
|
opt := nl.TcTbfQopt{}
|
|
opt.Rate.Rate = uint32(qdisc.Rate)
|
|
opt.Peakrate.Rate = uint32(qdisc.Peakrate)
|
|
opt.Limit = qdisc.Limit
|
|
opt.Buffer = qdisc.Buffer
|
|
options.AddRtAttr(nl.TCA_TBF_PARMS, opt.Serialize())
|
|
if qdisc.Rate >= uint64(1<<32) {
|
|
options.AddRtAttr(nl.TCA_TBF_RATE64, nl.Uint64Attr(qdisc.Rate))
|
|
}
|
|
if qdisc.Peakrate >= uint64(1<<32) {
|
|
options.AddRtAttr(nl.TCA_TBF_PRATE64, nl.Uint64Attr(qdisc.Peakrate))
|
|
}
|
|
if qdisc.Peakrate > 0 {
|
|
options.AddRtAttr(nl.TCA_TBF_PBURST, nl.Uint32Attr(qdisc.Minburst))
|
|
}
|
|
case *Htb:
|
|
opt := nl.TcHtbGlob{}
|
|
opt.Version = qdisc.Version
|
|
opt.Rate2Quantum = qdisc.Rate2Quantum
|
|
opt.Defcls = qdisc.Defcls
|
|
// TODO: Handle Debug properly. For now default to 0
|
|
opt.Debug = qdisc.Debug
|
|
opt.DirectPkts = qdisc.DirectPkts
|
|
options.AddRtAttr(nl.TCA_HTB_INIT, opt.Serialize())
|
|
// options.AddRtAttr(nl.TCA_HTB_DIRECT_QLEN, opt.Serialize())
|
|
case *Hfsc:
|
|
opt := nl.TcHfscOpt{}
|
|
opt.Defcls = qdisc.Defcls
|
|
options = nl.NewRtAttr(nl.TCA_OPTIONS, opt.Serialize())
|
|
case *Netem:
|
|
opt := nl.TcNetemQopt{}
|
|
opt.Latency = qdisc.Latency
|
|
opt.Limit = qdisc.Limit
|
|
opt.Loss = qdisc.Loss
|
|
opt.Gap = qdisc.Gap
|
|
opt.Duplicate = qdisc.Duplicate
|
|
opt.Jitter = qdisc.Jitter
|
|
options = nl.NewRtAttr(nl.TCA_OPTIONS, opt.Serialize())
|
|
// Correlation
|
|
corr := nl.TcNetemCorr{}
|
|
corr.DelayCorr = qdisc.DelayCorr
|
|
corr.LossCorr = qdisc.LossCorr
|
|
corr.DupCorr = qdisc.DuplicateCorr
|
|
|
|
if corr.DelayCorr > 0 || corr.LossCorr > 0 || corr.DupCorr > 0 {
|
|
options.AddRtAttr(nl.TCA_NETEM_CORR, corr.Serialize())
|
|
}
|
|
// Corruption
|
|
corruption := nl.TcNetemCorrupt{}
|
|
corruption.Probability = qdisc.CorruptProb
|
|
corruption.Correlation = qdisc.CorruptCorr
|
|
if corruption.Probability > 0 {
|
|
options.AddRtAttr(nl.TCA_NETEM_CORRUPT, corruption.Serialize())
|
|
}
|
|
// Reorder
|
|
reorder := nl.TcNetemReorder{}
|
|
reorder.Probability = qdisc.ReorderProb
|
|
reorder.Correlation = qdisc.ReorderCorr
|
|
if reorder.Probability > 0 {
|
|
options.AddRtAttr(nl.TCA_NETEM_REORDER, reorder.Serialize())
|
|
}
|
|
case *Ingress:
|
|
// ingress filters must use the proper handle
|
|
if qdisc.Attrs().Parent != HANDLE_INGRESS {
|
|
return fmt.Errorf("Ingress filters must set Parent to HANDLE_INGRESS")
|
|
}
|
|
case *FqCodel:
|
|
options.AddRtAttr(nl.TCA_FQ_CODEL_ECN, nl.Uint32Attr((uint32(qdisc.ECN))))
|
|
if qdisc.Limit > 0 {
|
|
options.AddRtAttr(nl.TCA_FQ_CODEL_LIMIT, nl.Uint32Attr((uint32(qdisc.Limit))))
|
|
}
|
|
if qdisc.Interval > 0 {
|
|
options.AddRtAttr(nl.TCA_FQ_CODEL_INTERVAL, nl.Uint32Attr((uint32(qdisc.Interval))))
|
|
}
|
|
if qdisc.Flows > 0 {
|
|
options.AddRtAttr(nl.TCA_FQ_CODEL_FLOWS, nl.Uint32Attr((uint32(qdisc.Flows))))
|
|
}
|
|
if qdisc.Quantum > 0 {
|
|
options.AddRtAttr(nl.TCA_FQ_CODEL_QUANTUM, nl.Uint32Attr((uint32(qdisc.Quantum))))
|
|
}
|
|
if qdisc.CEThreshold > 0 {
|
|
options.AddRtAttr(nl.TCA_FQ_CODEL_CE_THRESHOLD, nl.Uint32Attr(qdisc.CEThreshold))
|
|
}
|
|
if qdisc.DropBatchSize > 0 {
|
|
options.AddRtAttr(nl.TCA_FQ_CODEL_DROP_BATCH_SIZE, nl.Uint32Attr(qdisc.DropBatchSize))
|
|
}
|
|
if qdisc.MemoryLimit > 0 {
|
|
options.AddRtAttr(nl.TCA_FQ_CODEL_MEMORY_LIMIT, nl.Uint32Attr(qdisc.MemoryLimit))
|
|
}
|
|
case *Fq:
|
|
options.AddRtAttr(nl.TCA_FQ_RATE_ENABLE, nl.Uint32Attr((uint32(qdisc.Pacing))))
|
|
|
|
if qdisc.Buckets > 0 {
|
|
options.AddRtAttr(nl.TCA_FQ_BUCKETS_LOG, nl.Uint32Attr((uint32(qdisc.Buckets))))
|
|
}
|
|
if qdisc.LowRateThreshold > 0 {
|
|
options.AddRtAttr(nl.TCA_FQ_LOW_RATE_THRESHOLD, nl.Uint32Attr((uint32(qdisc.LowRateThreshold))))
|
|
}
|
|
if qdisc.Quantum > 0 {
|
|
options.AddRtAttr(nl.TCA_FQ_QUANTUM, nl.Uint32Attr((uint32(qdisc.Quantum))))
|
|
}
|
|
if qdisc.InitialQuantum > 0 {
|
|
options.AddRtAttr(nl.TCA_FQ_INITIAL_QUANTUM, nl.Uint32Attr((uint32(qdisc.InitialQuantum))))
|
|
}
|
|
if qdisc.FlowRefillDelay > 0 {
|
|
options.AddRtAttr(nl.TCA_FQ_FLOW_REFILL_DELAY, nl.Uint32Attr((uint32(qdisc.FlowRefillDelay))))
|
|
}
|
|
if qdisc.FlowPacketLimit > 0 {
|
|
options.AddRtAttr(nl.TCA_FQ_FLOW_PLIMIT, nl.Uint32Attr((uint32(qdisc.FlowPacketLimit))))
|
|
}
|
|
if qdisc.FlowMaxRate > 0 {
|
|
options.AddRtAttr(nl.TCA_FQ_FLOW_MAX_RATE, nl.Uint32Attr((uint32(qdisc.FlowMaxRate))))
|
|
}
|
|
if qdisc.FlowDefaultRate > 0 {
|
|
options.AddRtAttr(nl.TCA_FQ_FLOW_DEFAULT_RATE, nl.Uint32Attr((uint32(qdisc.FlowDefaultRate))))
|
|
}
|
|
if qdisc.Horizon > 0 {
|
|
options.AddRtAttr(nl.TCA_FQ_HORIZON, nl.Uint32Attr(qdisc.Horizon))
|
|
}
|
|
if qdisc.HorizonDropPolicy != HORIZON_DROP_POLICY_DEFAULT {
|
|
options.AddRtAttr(nl.TCA_FQ_HORIZON_DROP, nl.Uint8Attr(qdisc.HorizonDropPolicy))
|
|
}
|
|
case *Sfq:
|
|
opt := nl.TcSfqQoptV1{}
|
|
opt.TcSfqQopt.Quantum = qdisc.Quantum
|
|
opt.TcSfqQopt.Perturb = int32(qdisc.Perturb)
|
|
opt.TcSfqQopt.Limit = qdisc.Limit
|
|
opt.TcSfqQopt.Divisor = qdisc.Divisor
|
|
|
|
options = nl.NewRtAttr(nl.TCA_OPTIONS, opt.Serialize())
|
|
default:
|
|
options = nil
|
|
}
|
|
|
|
if options != nil {
|
|
req.AddData(options)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// QdiscList gets a list of qdiscs in the system.
|
|
// Equivalent to: `tc qdisc show`.
|
|
// The list can be filtered by link.
|
|
func QdiscList(link Link) ([]Qdisc, error) {
|
|
return pkgHandle.QdiscList(link)
|
|
}
|
|
|
|
// QdiscList gets a list of qdiscs in the system.
|
|
// Equivalent to: `tc qdisc show`.
|
|
// The list can be filtered by link.
|
|
func (h *Handle) QdiscList(link Link) ([]Qdisc, error) {
|
|
req := h.newNetlinkRequest(unix.RTM_GETQDISC, unix.NLM_F_DUMP)
|
|
index := int32(0)
|
|
if link != nil {
|
|
base := link.Attrs()
|
|
h.ensureIndex(base)
|
|
index = int32(base.Index)
|
|
}
|
|
msg := &nl.TcMsg{
|
|
Family: nl.FAMILY_ALL,
|
|
Ifindex: index,
|
|
}
|
|
req.AddData(msg)
|
|
|
|
msgs, err := req.Execute(unix.NETLINK_ROUTE, unix.RTM_NEWQDISC)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
var res []Qdisc
|
|
for _, m := range msgs {
|
|
msg := nl.DeserializeTcMsg(m)
|
|
|
|
attrs, err := nl.ParseRouteAttr(m[msg.Len():])
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
// skip qdiscs from other interfaces
|
|
if link != nil && msg.Ifindex != index {
|
|
continue
|
|
}
|
|
|
|
base := QdiscAttrs{
|
|
LinkIndex: int(msg.Ifindex),
|
|
Handle: msg.Handle,
|
|
Parent: msg.Parent,
|
|
Refcnt: msg.Info,
|
|
}
|
|
var qdisc Qdisc
|
|
qdiscType := ""
|
|
for _, attr := range attrs {
|
|
switch attr.Attr.Type {
|
|
case nl.TCA_KIND:
|
|
qdiscType = string(attr.Value[:len(attr.Value)-1])
|
|
switch qdiscType {
|
|
case "pfifo_fast":
|
|
qdisc = &PfifoFast{}
|
|
case "prio":
|
|
qdisc = &Prio{}
|
|
case "tbf":
|
|
qdisc = &Tbf{}
|
|
case "ingress":
|
|
qdisc = &Ingress{}
|
|
case "htb":
|
|
qdisc = &Htb{}
|
|
case "fq":
|
|
qdisc = &Fq{}
|
|
case "hfsc":
|
|
qdisc = &Hfsc{}
|
|
case "fq_codel":
|
|
qdisc = &FqCodel{}
|
|
case "netem":
|
|
qdisc = &Netem{}
|
|
case "sfq":
|
|
qdisc = &Sfq{}
|
|
default:
|
|
qdisc = &GenericQdisc{QdiscType: qdiscType}
|
|
}
|
|
case nl.TCA_OPTIONS:
|
|
switch qdiscType {
|
|
case "pfifo_fast":
|
|
// pfifo returns TcPrioMap directly without wrapping it in rtattr
|
|
if err := parsePfifoFastData(qdisc, attr.Value); err != nil {
|
|
return nil, err
|
|
}
|
|
case "prio":
|
|
// prio returns TcPrioMap directly without wrapping it in rtattr
|
|
if err := parsePrioData(qdisc, attr.Value); err != nil {
|
|
return nil, err
|
|
}
|
|
case "tbf":
|
|
data, err := nl.ParseRouteAttr(attr.Value)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
if err := parseTbfData(qdisc, data); err != nil {
|
|
return nil, err
|
|
}
|
|
case "hfsc":
|
|
if err := parseHfscData(qdisc, attr.Value); err != nil {
|
|
return nil, err
|
|
}
|
|
case "htb":
|
|
data, err := nl.ParseRouteAttr(attr.Value)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
if err := parseHtbData(qdisc, data); err != nil {
|
|
return nil, err
|
|
}
|
|
case "fq":
|
|
data, err := nl.ParseRouteAttr(attr.Value)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
if err := parseFqData(qdisc, data); err != nil {
|
|
return nil, err
|
|
}
|
|
case "fq_codel":
|
|
data, err := nl.ParseRouteAttr(attr.Value)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
if err := parseFqCodelData(qdisc, data); err != nil {
|
|
return nil, err
|
|
}
|
|
case "netem":
|
|
if err := parseNetemData(qdisc, attr.Value); err != nil {
|
|
return nil, err
|
|
}
|
|
case "sfq":
|
|
if err := parseSfqData(qdisc, attr.Value); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
// no options for ingress
|
|
}
|
|
case nl.TCA_INGRESS_BLOCK:
|
|
ingressBlock := new(uint32)
|
|
*ingressBlock = native.Uint32(attr.Value)
|
|
base.IngressBlock = ingressBlock
|
|
}
|
|
}
|
|
*qdisc.Attrs() = base
|
|
res = append(res, qdisc)
|
|
}
|
|
|
|
return res, nil
|
|
}
|
|
|
|
func parsePfifoFastData(qdisc Qdisc, value []byte) error {
|
|
pfifo := qdisc.(*PfifoFast)
|
|
tcmap := nl.DeserializeTcPrioMap(value)
|
|
pfifo.PriorityMap = tcmap.Priomap
|
|
pfifo.Bands = uint8(tcmap.Bands)
|
|
return nil
|
|
}
|
|
|
|
func parsePrioData(qdisc Qdisc, value []byte) error {
|
|
prio := qdisc.(*Prio)
|
|
tcmap := nl.DeserializeTcPrioMap(value)
|
|
prio.PriorityMap = tcmap.Priomap
|
|
prio.Bands = uint8(tcmap.Bands)
|
|
return nil
|
|
}
|
|
|
|
func parseHtbData(qdisc Qdisc, data []syscall.NetlinkRouteAttr) error {
|
|
htb := qdisc.(*Htb)
|
|
for _, datum := range data {
|
|
switch datum.Attr.Type {
|
|
case nl.TCA_HTB_INIT:
|
|
opt := nl.DeserializeTcHtbGlob(datum.Value)
|
|
htb.Version = opt.Version
|
|
htb.Rate2Quantum = opt.Rate2Quantum
|
|
htb.Defcls = opt.Defcls
|
|
htb.Debug = opt.Debug
|
|
htb.DirectPkts = opt.DirectPkts
|
|
case nl.TCA_HTB_DIRECT_QLEN:
|
|
// TODO
|
|
//htb.DirectQlen = native.uint32(datum.Value)
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func parseFqCodelData(qdisc Qdisc, data []syscall.NetlinkRouteAttr) error {
|
|
fqCodel := qdisc.(*FqCodel)
|
|
for _, datum := range data {
|
|
|
|
switch datum.Attr.Type {
|
|
case nl.TCA_FQ_CODEL_TARGET:
|
|
fqCodel.Target = native.Uint32(datum.Value)
|
|
case nl.TCA_FQ_CODEL_LIMIT:
|
|
fqCodel.Limit = native.Uint32(datum.Value)
|
|
case nl.TCA_FQ_CODEL_INTERVAL:
|
|
fqCodel.Interval = native.Uint32(datum.Value)
|
|
case nl.TCA_FQ_CODEL_ECN:
|
|
fqCodel.ECN = native.Uint32(datum.Value)
|
|
case nl.TCA_FQ_CODEL_FLOWS:
|
|
fqCodel.Flows = native.Uint32(datum.Value)
|
|
case nl.TCA_FQ_CODEL_QUANTUM:
|
|
fqCodel.Quantum = native.Uint32(datum.Value)
|
|
case nl.TCA_FQ_CODEL_CE_THRESHOLD:
|
|
fqCodel.CEThreshold = native.Uint32(datum.Value)
|
|
case nl.TCA_FQ_CODEL_DROP_BATCH_SIZE:
|
|
fqCodel.DropBatchSize = native.Uint32(datum.Value)
|
|
case nl.TCA_FQ_CODEL_MEMORY_LIMIT:
|
|
fqCodel.MemoryLimit = native.Uint32(datum.Value)
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func parseHfscData(qdisc Qdisc, data []byte) error {
|
|
Hfsc := qdisc.(*Hfsc)
|
|
Hfsc.Defcls = native.Uint16(data)
|
|
return nil
|
|
}
|
|
|
|
func parseFqData(qdisc Qdisc, data []syscall.NetlinkRouteAttr) error {
|
|
fq := qdisc.(*Fq)
|
|
for _, datum := range data {
|
|
switch datum.Attr.Type {
|
|
case nl.TCA_FQ_BUCKETS_LOG:
|
|
fq.Buckets = native.Uint32(datum.Value)
|
|
case nl.TCA_FQ_LOW_RATE_THRESHOLD:
|
|
fq.LowRateThreshold = native.Uint32(datum.Value)
|
|
case nl.TCA_FQ_QUANTUM:
|
|
fq.Quantum = native.Uint32(datum.Value)
|
|
case nl.TCA_FQ_RATE_ENABLE:
|
|
fq.Pacing = native.Uint32(datum.Value)
|
|
case nl.TCA_FQ_INITIAL_QUANTUM:
|
|
fq.InitialQuantum = native.Uint32(datum.Value)
|
|
case nl.TCA_FQ_ORPHAN_MASK:
|
|
// TODO
|
|
case nl.TCA_FQ_FLOW_REFILL_DELAY:
|
|
fq.FlowRefillDelay = native.Uint32(datum.Value)
|
|
case nl.TCA_FQ_FLOW_PLIMIT:
|
|
fq.FlowPacketLimit = native.Uint32(datum.Value)
|
|
case nl.TCA_FQ_PLIMIT:
|
|
fq.PacketLimit = native.Uint32(datum.Value)
|
|
case nl.TCA_FQ_FLOW_MAX_RATE:
|
|
fq.FlowMaxRate = native.Uint32(datum.Value)
|
|
case nl.TCA_FQ_FLOW_DEFAULT_RATE:
|
|
fq.FlowDefaultRate = native.Uint32(datum.Value)
|
|
case nl.TCA_FQ_HORIZON:
|
|
fq.Horizon = native.Uint32(datum.Value)
|
|
case nl.TCA_FQ_HORIZON_DROP:
|
|
fq.HorizonDropPolicy = datum.Value[0]
|
|
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func parseNetemData(qdisc Qdisc, value []byte) error {
|
|
netem := qdisc.(*Netem)
|
|
opt := nl.DeserializeTcNetemQopt(value)
|
|
netem.Latency = opt.Latency
|
|
netem.Limit = opt.Limit
|
|
netem.Loss = opt.Loss
|
|
netem.Gap = opt.Gap
|
|
netem.Duplicate = opt.Duplicate
|
|
netem.Jitter = opt.Jitter
|
|
data, err := nl.ParseRouteAttr(value[nl.SizeofTcNetemQopt:])
|
|
if err != nil {
|
|
return err
|
|
}
|
|
for _, datum := range data {
|
|
switch datum.Attr.Type {
|
|
case nl.TCA_NETEM_CORR:
|
|
opt := nl.DeserializeTcNetemCorr(datum.Value)
|
|
netem.DelayCorr = opt.DelayCorr
|
|
netem.LossCorr = opt.LossCorr
|
|
netem.DuplicateCorr = opt.DupCorr
|
|
case nl.TCA_NETEM_CORRUPT:
|
|
opt := nl.DeserializeTcNetemCorrupt(datum.Value)
|
|
netem.CorruptProb = opt.Probability
|
|
netem.CorruptCorr = opt.Correlation
|
|
case nl.TCA_NETEM_REORDER:
|
|
opt := nl.DeserializeTcNetemReorder(datum.Value)
|
|
netem.ReorderProb = opt.Probability
|
|
netem.ReorderCorr = opt.Correlation
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func parseTbfData(qdisc Qdisc, data []syscall.NetlinkRouteAttr) error {
|
|
tbf := qdisc.(*Tbf)
|
|
for _, datum := range data {
|
|
switch datum.Attr.Type {
|
|
case nl.TCA_TBF_PARMS:
|
|
opt := nl.DeserializeTcTbfQopt(datum.Value)
|
|
tbf.Rate = uint64(opt.Rate.Rate)
|
|
tbf.Peakrate = uint64(opt.Peakrate.Rate)
|
|
tbf.Limit = opt.Limit
|
|
tbf.Buffer = opt.Buffer
|
|
case nl.TCA_TBF_RATE64:
|
|
tbf.Rate = native.Uint64(datum.Value[0:8])
|
|
case nl.TCA_TBF_PRATE64:
|
|
tbf.Peakrate = native.Uint64(datum.Value[0:8])
|
|
case nl.TCA_TBF_PBURST:
|
|
tbf.Minburst = native.Uint32(datum.Value[0:4])
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func parseSfqData(qdisc Qdisc, value []byte) error {
|
|
sfq := qdisc.(*Sfq)
|
|
opt := nl.DeserializeTcSfqQoptV1(value)
|
|
sfq.Quantum = opt.TcSfqQopt.Quantum
|
|
sfq.Perturb = uint8(opt.TcSfqQopt.Perturb)
|
|
sfq.Limit = opt.TcSfqQopt.Limit
|
|
sfq.Divisor = opt.TcSfqQopt.Divisor
|
|
|
|
return nil
|
|
}
|
|
|
|
const (
|
|
TIME_UNITS_PER_SEC = 1000000
|
|
)
|
|
|
|
var (
|
|
tickInUsec float64
|
|
clockFactor float64
|
|
hz float64
|
|
)
|
|
|
|
func initClock() {
|
|
data, err := ioutil.ReadFile("/proc/net/psched")
|
|
if err != nil {
|
|
return
|
|
}
|
|
parts := strings.Split(strings.TrimSpace(string(data)), " ")
|
|
if len(parts) < 4 {
|
|
return
|
|
}
|
|
var vals [4]uint64
|
|
for i := range vals {
|
|
val, err := strconv.ParseUint(parts[i], 16, 32)
|
|
if err != nil {
|
|
return
|
|
}
|
|
vals[i] = val
|
|
}
|
|
// compatibility
|
|
if vals[2] == 1000000000 {
|
|
vals[0] = vals[1]
|
|
}
|
|
clockFactor = float64(vals[2]) / TIME_UNITS_PER_SEC
|
|
tickInUsec = float64(vals[0]) / float64(vals[1]) * clockFactor
|
|
if vals[2] == 1000000 {
|
|
// ref https://git.kernel.org/pub/scm/network/iproute2/iproute2.git/tree/lib/utils.c#n963
|
|
hz = float64(vals[3])
|
|
} else {
|
|
hz = 100
|
|
}
|
|
}
|
|
|
|
func TickInUsec() float64 {
|
|
if tickInUsec == 0.0 {
|
|
initClock()
|
|
}
|
|
return tickInUsec
|
|
}
|
|
|
|
func ClockFactor() float64 {
|
|
if clockFactor == 0.0 {
|
|
initClock()
|
|
}
|
|
return clockFactor
|
|
}
|
|
|
|
func Hz() float64 {
|
|
if hz == 0.0 {
|
|
initClock()
|
|
}
|
|
return hz
|
|
}
|
|
|
|
func time2Tick(time uint32) uint32 {
|
|
return uint32(float64(time) * TickInUsec())
|
|
}
|
|
|
|
func tick2Time(tick uint32) uint32 {
|
|
return uint32(float64(tick) / TickInUsec())
|
|
}
|
|
|
|
func time2Ktime(time uint32) uint32 {
|
|
return uint32(float64(time) * ClockFactor())
|
|
}
|
|
|
|
func ktime2Time(ktime uint32) uint32 {
|
|
return uint32(float64(ktime) / ClockFactor())
|
|
}
|
|
|
|
func burst(rate uint64, buffer uint32) uint32 {
|
|
return uint32(float64(rate) * float64(tick2Time(buffer)) / TIME_UNITS_PER_SEC)
|
|
}
|
|
|
|
func latency(rate uint64, limit, buffer uint32) float64 {
|
|
return TIME_UNITS_PER_SEC*(float64(limit)/float64(rate)) - float64(tick2Time(buffer))
|
|
}
|
|
|
|
func Xmittime(rate uint64, size uint32) uint32 {
|
|
// https://git.kernel.org/pub/scm/network/iproute2/iproute2.git/tree/tc/tc_core.c#n62
|
|
return time2Tick(uint32(TIME_UNITS_PER_SEC * (float64(size) / float64(rate))))
|
|
}
|
|
|
|
func Xmitsize(rate uint64, ticks uint32) uint32 {
|
|
return uint32((float64(rate) * float64(tick2Time(ticks))) / TIME_UNITS_PER_SEC)
|
|
}
|