summaryrefslogtreecommitdiff
path: root/vendor/github.com/vishvananda/netlink/qdisc.go
blob: f594c9c212df441a817ff585ea05c47ea903d278 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
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"
}