367 lines
7.7 KiB
Go
367 lines
7.7 KiB
Go
package netlink
|
|
|
|
import (
|
|
"fmt"
|
|
"math"
|
|
)
|
|
|
|
const (
|
|
HANDLE_NONE = 0
|
|
HANDLE_INGRESS = 0xFFFFFFF1
|
|
HANDLE_CLSACT = HANDLE_INGRESS
|
|
HANDLE_ROOT = 0xFFFFFFFF
|
|
PRIORITY_MAP_LEN = 16
|
|
)
|
|
const (
|
|
HANDLE_MIN_INGRESS = 0xFFFFFFF2
|
|
HANDLE_MIN_EGRESS = 0xFFFFFFF3
|
|
)
|
|
|
|
type Qdisc interface {
|
|
Attrs() *QdiscAttrs
|
|
Type() string
|
|
}
|
|
|
|
// QdiscAttrs represents a netlink qdisc. A qdisc is associated with a link,
|
|
// has a handle, a parent and a refcnt. The root qdisc of a device should
|
|
// have parent == HANDLE_ROOT.
|
|
type QdiscAttrs struct {
|
|
LinkIndex int
|
|
Handle uint32
|
|
Parent uint32
|
|
Refcnt uint32 // read only
|
|
}
|
|
|
|
func (q QdiscAttrs) String() string {
|
|
return fmt.Sprintf("{LinkIndex: %d, Handle: %s, Parent: %s, Refcnt: %d}", q.LinkIndex, HandleStr(q.Handle), HandleStr(q.Parent), q.Refcnt)
|
|
}
|
|
|
|
func MakeHandle(major, minor uint16) uint32 {
|
|
return (uint32(major) << 16) | uint32(minor)
|
|
}
|
|
|
|
func MajorMinor(handle uint32) (uint16, uint16) {
|
|
return uint16((handle & 0xFFFF0000) >> 16), uint16(handle & 0x0000FFFFF)
|
|
}
|
|
|
|
func HandleStr(handle uint32) string {
|
|
switch handle {
|
|
case HANDLE_NONE:
|
|
return "none"
|
|
case HANDLE_INGRESS:
|
|
return "ingress"
|
|
case HANDLE_ROOT:
|
|
return "root"
|
|
default:
|
|
major, minor := MajorMinor(handle)
|
|
return fmt.Sprintf("%x:%x", major, minor)
|
|
}
|
|
}
|
|
|
|
func Percentage2u32(percentage float32) uint32 {
|
|
// FIXME this is most likely not the best way to convert from % to uint32
|
|
if percentage == 100 {
|
|
return math.MaxUint32
|
|
}
|
|
return uint32(math.MaxUint32 * (percentage / 100))
|
|
}
|
|
|
|
// PfifoFast is the default qdisc created by the kernel if one has not
|
|
// been defined for the interface
|
|
type PfifoFast struct {
|
|
QdiscAttrs
|
|
Bands uint8
|
|
PriorityMap [PRIORITY_MAP_LEN]uint8
|
|
}
|
|
|
|
func (qdisc *PfifoFast) Attrs() *QdiscAttrs {
|
|
return &qdisc.QdiscAttrs
|
|
}
|
|
|
|
func (qdisc *PfifoFast) Type() string {
|
|
return "pfifo_fast"
|
|
}
|
|
|
|
// Prio is a basic qdisc that works just like PfifoFast
|
|
type Prio struct {
|
|
QdiscAttrs
|
|
Bands uint8
|
|
PriorityMap [PRIORITY_MAP_LEN]uint8
|
|
}
|
|
|
|
func NewPrio(attrs QdiscAttrs) *Prio {
|
|
return &Prio{
|
|
QdiscAttrs: attrs,
|
|
Bands: 3,
|
|
PriorityMap: [PRIORITY_MAP_LEN]uint8{1, 2, 2, 2, 1, 2, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1},
|
|
}
|
|
}
|
|
|
|
func (qdisc *Prio) Attrs() *QdiscAttrs {
|
|
return &qdisc.QdiscAttrs
|
|
}
|
|
|
|
func (qdisc *Prio) Type() string {
|
|
return "prio"
|
|
}
|
|
|
|
// Htb is a classful qdisc that rate limits based on tokens
|
|
type Htb struct {
|
|
QdiscAttrs
|
|
Version uint32
|
|
Rate2Quantum uint32
|
|
Defcls uint32
|
|
Debug uint32
|
|
DirectPkts uint32
|
|
}
|
|
|
|
func NewHtb(attrs QdiscAttrs) *Htb {
|
|
return &Htb{
|
|
QdiscAttrs: attrs,
|
|
Version: 3,
|
|
Defcls: 0,
|
|
Rate2Quantum: 10,
|
|
Debug: 0,
|
|
DirectPkts: 0,
|
|
}
|
|
}
|
|
|
|
func (qdisc *Htb) Attrs() *QdiscAttrs {
|
|
return &qdisc.QdiscAttrs
|
|
}
|
|
|
|
func (qdisc *Htb) Type() string {
|
|
return "htb"
|
|
}
|
|
|
|
// Netem is a classless qdisc that rate limits based on tokens
|
|
|
|
type NetemQdiscAttrs struct {
|
|
Latency uint32 // in us
|
|
DelayCorr float32 // in %
|
|
Limit uint32
|
|
Loss float32 // in %
|
|
LossCorr float32 // in %
|
|
Gap uint32
|
|
Duplicate float32 // in %
|
|
DuplicateCorr float32 // in %
|
|
Jitter uint32 // in us
|
|
ReorderProb float32 // in %
|
|
ReorderCorr float32 // in %
|
|
CorruptProb float32 // in %
|
|
CorruptCorr float32 // in %
|
|
}
|
|
|
|
func (q NetemQdiscAttrs) String() string {
|
|
return fmt.Sprintf(
|
|
"{Latency: %d, Limit: %d, Loss: %f, Gap: %d, Duplicate: %f, Jitter: %d}",
|
|
q.Latency, q.Limit, q.Loss, q.Gap, q.Duplicate, q.Jitter,
|
|
)
|
|
}
|
|
|
|
type Netem struct {
|
|
QdiscAttrs
|
|
Latency uint32
|
|
DelayCorr uint32
|
|
Limit uint32
|
|
Loss uint32
|
|
LossCorr uint32
|
|
Gap uint32
|
|
Duplicate uint32
|
|
DuplicateCorr uint32
|
|
Jitter uint32
|
|
ReorderProb uint32
|
|
ReorderCorr uint32
|
|
CorruptProb uint32
|
|
CorruptCorr uint32
|
|
}
|
|
|
|
func (netem *Netem) String() string {
|
|
return fmt.Sprintf(
|
|
"{Latency: %v, Limit: %v, Loss: %v, Gap: %v, Duplicate: %v, Jitter: %v}",
|
|
netem.Latency, netem.Limit, netem.Loss, netem.Gap, netem.Duplicate, netem.Jitter,
|
|
)
|
|
}
|
|
|
|
func (qdisc *Netem) Attrs() *QdiscAttrs {
|
|
return &qdisc.QdiscAttrs
|
|
}
|
|
|
|
func (qdisc *Netem) Type() string {
|
|
return "netem"
|
|
}
|
|
|
|
// Tbf is a classless qdisc that rate limits based on tokens
|
|
type Tbf struct {
|
|
QdiscAttrs
|
|
Rate uint64
|
|
Limit uint32
|
|
Buffer uint32
|
|
Peakrate uint64
|
|
Minburst uint32
|
|
// TODO: handle other settings
|
|
}
|
|
|
|
func (qdisc *Tbf) Attrs() *QdiscAttrs {
|
|
return &qdisc.QdiscAttrs
|
|
}
|
|
|
|
func (qdisc *Tbf) Type() string {
|
|
return "tbf"
|
|
}
|
|
|
|
// Ingress is a qdisc for adding ingress filters
|
|
type Ingress struct {
|
|
QdiscAttrs
|
|
}
|
|
|
|
func (qdisc *Ingress) Attrs() *QdiscAttrs {
|
|
return &qdisc.QdiscAttrs
|
|
}
|
|
|
|
func (qdisc *Ingress) Type() string {
|
|
return "ingress"
|
|
}
|
|
|
|
// GenericQdisc qdiscs represent types that are not currently understood
|
|
// by this netlink library.
|
|
type GenericQdisc struct {
|
|
QdiscAttrs
|
|
QdiscType string
|
|
}
|
|
|
|
func (qdisc *GenericQdisc) Attrs() *QdiscAttrs {
|
|
return &qdisc.QdiscAttrs
|
|
}
|
|
|
|
func (qdisc *GenericQdisc) Type() string {
|
|
return qdisc.QdiscType
|
|
}
|
|
|
|
type Hfsc struct {
|
|
QdiscAttrs
|
|
Defcls uint16
|
|
}
|
|
|
|
func NewHfsc(attrs QdiscAttrs) *Hfsc {
|
|
return &Hfsc{
|
|
QdiscAttrs: attrs,
|
|
Defcls: 1,
|
|
}
|
|
}
|
|
|
|
func (hfsc *Hfsc) Attrs() *QdiscAttrs {
|
|
return &hfsc.QdiscAttrs
|
|
}
|
|
|
|
func (hfsc *Hfsc) Type() string {
|
|
return "hfsc"
|
|
}
|
|
|
|
func (hfsc *Hfsc) String() string {
|
|
return fmt.Sprintf(
|
|
"{%v -- default: %d}",
|
|
hfsc.Attrs(), hfsc.Defcls,
|
|
)
|
|
}
|
|
|
|
// Fq is a classless packet scheduler meant to be mostly used for locally generated traffic.
|
|
type Fq struct {
|
|
QdiscAttrs
|
|
PacketLimit uint32
|
|
FlowPacketLimit uint32
|
|
// In bytes
|
|
Quantum uint32
|
|
InitialQuantum uint32
|
|
// called RateEnable under the hood
|
|
Pacing uint32
|
|
FlowDefaultRate uint32
|
|
FlowMaxRate uint32
|
|
// called BucketsLog under the hood
|
|
Buckets uint32
|
|
FlowRefillDelay uint32
|
|
LowRateThreshold uint32
|
|
}
|
|
|
|
func (fq *Fq) String() string {
|
|
return fmt.Sprintf(
|
|
"{PacketLimit: %v, FlowPacketLimit: %v, Quantum: %v, InitialQuantum: %v, Pacing: %v, FlowDefaultRate: %v, FlowMaxRate: %v, Buckets: %v, FlowRefillDelay: %v, LowRateThreshold: %v}",
|
|
fq.PacketLimit, fq.FlowPacketLimit, fq.Quantum, fq.InitialQuantum, fq.Pacing, fq.FlowDefaultRate, fq.FlowMaxRate, fq.Buckets, fq.FlowRefillDelay, fq.LowRateThreshold,
|
|
)
|
|
}
|
|
|
|
func NewFq(attrs QdiscAttrs) *Fq {
|
|
return &Fq{
|
|
QdiscAttrs: attrs,
|
|
Pacing: 1,
|
|
}
|
|
}
|
|
|
|
func (qdisc *Fq) Attrs() *QdiscAttrs {
|
|
return &qdisc.QdiscAttrs
|
|
}
|
|
|
|
func (qdisc *Fq) Type() string {
|
|
return "fq"
|
|
}
|
|
|
|
// FQ_Codel (Fair Queuing Controlled Delay) is queuing discipline that combines Fair Queuing with the CoDel AQM scheme.
|
|
type FqCodel struct {
|
|
QdiscAttrs
|
|
Target uint32
|
|
Limit uint32
|
|
Interval uint32
|
|
ECN uint32
|
|
Flows uint32
|
|
Quantum uint32
|
|
CEThreshold uint32
|
|
DropBatchSize uint32
|
|
MemoryLimit uint32
|
|
}
|
|
|
|
func (fqcodel *FqCodel) String() string {
|
|
return fmt.Sprintf(
|
|
"{%v -- Target: %v, Limit: %v, Interval: %v, ECM: %v, Flows: %v, Quantum: %v}",
|
|
fqcodel.Attrs(), fqcodel.Target, fqcodel.Limit, fqcodel.Interval, fqcodel.ECN, fqcodel.Flows, fqcodel.Quantum,
|
|
)
|
|
}
|
|
|
|
func NewFqCodel(attrs QdiscAttrs) *FqCodel {
|
|
return &FqCodel{
|
|
QdiscAttrs: attrs,
|
|
ECN: 1,
|
|
}
|
|
}
|
|
|
|
func (qdisc *FqCodel) Attrs() *QdiscAttrs {
|
|
return &qdisc.QdiscAttrs
|
|
}
|
|
|
|
func (qdisc *FqCodel) Type() string {
|
|
return "fq_codel"
|
|
}
|
|
|
|
type Sfq struct {
|
|
QdiscAttrs
|
|
// TODO: Only the simplified options for SFQ are handled here. Support for the extended one can be added later.
|
|
Quantum uint8
|
|
Perturb uint8
|
|
Limit uint32
|
|
Divisor uint8
|
|
}
|
|
|
|
func (sfq *Sfq) String() string {
|
|
return fmt.Sprintf(
|
|
"{%v -- Quantum: %v, Perturb: %v, Limit: %v, Divisor: %v}",
|
|
sfq.Attrs(), sfq.Quantum, sfq.Perturb, sfq.Limit, sfq.Divisor,
|
|
)
|
|
}
|
|
|
|
func (qdisc *Sfq) Attrs() *QdiscAttrs {
|
|
return &qdisc.QdiscAttrs
|
|
}
|
|
|
|
func (qdisc *Sfq) Type() string {
|
|
return "sfq"
|
|
}
|