]> git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/blame - net/sched/Kconfig
sched: Consolidate account_system_vtime extern declaration
[mirror_ubuntu-artful-kernel.git] / net / sched / Kconfig
CommitLineData
1da177e4
LT
1#
2# Traffic control configuration.
3#
6a2e9b73 4
85ef3e5c 5menuconfig NET_SCHED
6a2e9b73 6 bool "QoS and/or fair queueing"
3c62f75a 7 select NET_SCH_FIFO
6a2e9b73
SR
8 ---help---
9 When the kernel has several packets to send out over a network
10 device, it has to decide which ones to send first, which ones to
52ab4ac2
TG
11 delay, and which ones to drop. This is the job of the queueing
12 disciplines, several different algorithms for how to do this
6a2e9b73
SR
13 "fairly" have been proposed.
14
15 If you say N here, you will get the standard packet scheduler, which
16 is a FIFO (first come, first served). If you say Y here, you will be
17 able to choose from among several alternative algorithms which can
18 then be attached to different network devices. This is useful for
19 example if some of your network devices are real time devices that
20 need a certain minimum data flow rate, or if you need to limit the
21 maximum data flow rate for traffic which matches specified criteria.
22 This code is considered to be experimental.
23
24 To administer these schedulers, you'll need the user-level utilities
25 from the package iproute2+tc at <ftp://ftp.tux.org/pub/net/ip-routing/>.
26 That package also contains some documentation; for more, check out
52ab4ac2 27 <http://linux-net.osdl.org/index.php/Iproute2>.
6a2e9b73
SR
28
29 This Quality of Service (QoS) support will enable you to use
30 Differentiated Services (diffserv) and Resource Reservation Protocol
52ab4ac2
TG
31 (RSVP) on your Linux router if you also say Y to the corresponding
32 classifiers below. Documentation and software is at
33 <http://diffserv.sourceforge.net/>.
6a2e9b73
SR
34
35 If you say Y here and to "/proc file system" below, you will be able
36 to read status information about packet schedulers from the file
37 /proc/net/psched.
38
39 The available schedulers are listed in the following questions; you
40 can say Y to as many as you like. If unsure, say N now.
41
05b8b0fa
RZ
42if NET_SCHED
43
52ab4ac2 44comment "Queueing/Scheduling"
52ab4ac2 45
1da177e4 46config NET_SCH_CBQ
52ab4ac2 47 tristate "Class Based Queueing (CBQ)"
1da177e4
LT
48 ---help---
49 Say Y here if you want to use the Class-Based Queueing (CBQ) packet
52ab4ac2
TG
50 scheduling algorithm. This algorithm classifies the waiting packets
51 into a tree-like hierarchy of classes; the leaves of this tree are
52 in turn scheduled by separate algorithms.
1da177e4 53
52ab4ac2 54 See the top of <file:net/sched/sch_cbq.c> for more details.
1da177e4
LT
55
56 CBQ is a commonly used scheduler, so if you're unsure, you should
57 say Y here. Then say Y to all the queueing algorithms below that you
52ab4ac2 58 want to use as leaf disciplines.
1da177e4
LT
59
60 To compile this code as a module, choose M here: the
61 module will be called sch_cbq.
62
63config NET_SCH_HTB
52ab4ac2 64 tristate "Hierarchical Token Bucket (HTB)"
1da177e4
LT
65 ---help---
66 Say Y here if you want to use the Hierarchical Token Buckets (HTB)
52ab4ac2 67 packet scheduling algorithm. See
1da177e4
LT
68 <http://luxik.cdi.cz/~devik/qos/htb/> for complete manual and
69 in-depth articles.
70
52ab4ac2 71 HTB is very similar to CBQ regarding its goals however is has
1da177e4
LT
72 different properties and different algorithm.
73
74 To compile this code as a module, choose M here: the
75 module will be called sch_htb.
76
77config NET_SCH_HFSC
52ab4ac2 78 tristate "Hierarchical Fair Service Curve (HFSC)"
1da177e4
LT
79 ---help---
80 Say Y here if you want to use the Hierarchical Fair Service Curve
52ab4ac2 81 (HFSC) packet scheduling algorithm.
1da177e4
LT
82
83 To compile this code as a module, choose M here: the
84 module will be called sch_hfsc.
85
1da177e4 86config NET_SCH_ATM
52ab4ac2 87 tristate "ATM Virtual Circuits (ATM)"
05b8b0fa 88 depends on ATM
1da177e4
LT
89 ---help---
90 Say Y here if you want to use the ATM pseudo-scheduler. This
52ab4ac2
TG
91 provides a framework for invoking classifiers, which in turn
92 select classes of this queuing discipline. Each class maps
93 the flow(s) it is handling to a given virtual circuit.
94
99acaeb9 95 See the top of <file:net/sched/sch_atm.c> for more details.
1da177e4
LT
96
97 To compile this code as a module, choose M here: the
98 module will be called sch_atm.
99
100config NET_SCH_PRIO
52ab4ac2 101 tristate "Multi Band Priority Queueing (PRIO)"
52ab4ac2 102 ---help---
1da177e4 103 Say Y here if you want to use an n-band priority queue packet
52ab4ac2 104 scheduler.
1da177e4
LT
105
106 To compile this code as a module, choose M here: the
107 module will be called sch_prio.
108
92651940
AD
109config NET_SCH_MULTIQ
110 tristate "Hardware Multiqueue-aware Multi Band Queuing (MULTIQ)"
111 ---help---
112 Say Y here if you want to use an n-band queue packet scheduler
113 to support devices that have multiple hardware transmit queues.
114
115 To compile this code as a module, choose M here: the
116 module will be called sch_multiq.
117
1da177e4 118config NET_SCH_RED
52ab4ac2 119 tristate "Random Early Detection (RED)"
52ab4ac2 120 ---help---
1da177e4 121 Say Y here if you want to use the Random Early Detection (RED)
52ab4ac2
TG
122 packet scheduling algorithm.
123
124 See the top of <file:net/sched/sch_red.c> for more details.
1da177e4
LT
125
126 To compile this code as a module, choose M here: the
127 module will be called sch_red.
128
129config NET_SCH_SFQ
52ab4ac2 130 tristate "Stochastic Fairness Queueing (SFQ)"
1da177e4
LT
131 ---help---
132 Say Y here if you want to use the Stochastic Fairness Queueing (SFQ)
99acaeb9 133 packet scheduling algorithm.
52ab4ac2
TG
134
135 See the top of <file:net/sched/sch_sfq.c> for more details.
1da177e4
LT
136
137 To compile this code as a module, choose M here: the
138 module will be called sch_sfq.
139
140config NET_SCH_TEQL
52ab4ac2 141 tristate "True Link Equalizer (TEQL)"
1da177e4
LT
142 ---help---
143 Say Y here if you want to use the True Link Equalizer (TLE) packet
52ab4ac2
TG
144 scheduling algorithm. This queueing discipline allows the combination
145 of several physical devices into one virtual device.
146
147 See the top of <file:net/sched/sch_teql.c> for more details.
1da177e4
LT
148
149 To compile this code as a module, choose M here: the
150 module will be called sch_teql.
151
152config NET_SCH_TBF
52ab4ac2 153 tristate "Token Bucket Filter (TBF)"
52ab4ac2
TG
154 ---help---
155 Say Y here if you want to use the Token Bucket Filter (TBF) packet
156 scheduling algorithm.
157
158 See the top of <file:net/sched/sch_tbf.c> for more details.
1da177e4
LT
159
160 To compile this code as a module, choose M here: the
161 module will be called sch_tbf.
162
163config NET_SCH_GRED
52ab4ac2 164 tristate "Generic Random Early Detection (GRED)"
52ab4ac2 165 ---help---
1da177e4 166 Say Y here if you want to use the Generic Random Early Detection
20cc6bef 167 (GRED) packet scheduling algorithm for some of your network devices
1da177e4
LT
168 (see the top of <file:net/sched/sch_red.c> for details and
169 references about the algorithm).
170
171 To compile this code as a module, choose M here: the
172 module will be called sch_gred.
173
174config NET_SCH_DSMARK
52ab4ac2 175 tristate "Differentiated Services marker (DSMARK)"
52ab4ac2 176 ---help---
1da177e4
LT
177 Say Y if you want to schedule packets according to the
178 Differentiated Services architecture proposed in RFC 2475.
179 Technical information on this method, with pointers to associated
180 RFCs, is available at <http://www.gta.ufrj.br/diffserv/>.
181
182 To compile this code as a module, choose M here: the
183 module will be called sch_dsmark.
184
185config NET_SCH_NETEM
52ab4ac2 186 tristate "Network emulator (NETEM)"
52ab4ac2 187 ---help---
1da177e4
LT
188 Say Y if you want to emulate network delay, loss, and packet
189 re-ordering. This is often useful to simulate networks when
190 testing applications or protocols.
191
192 To compile this driver as a module, choose M here: the module
193 will be called sch_netem.
194
195 If unsure, say N.
196
13d2a1d2
PM
197config NET_SCH_DRR
198 tristate "Deficit Round Robin scheduler (DRR)"
199 help
200 Say Y here if you want to use the Deficit Round Robin (DRR) packet
201 scheduling algorithm.
202
203 To compile this driver as a module, choose M here: the module
204 will be called sch_drr.
205
206 If unsure, say N.
207
1da177e4
LT
208config NET_SCH_INGRESS
209 tristate "Ingress Qdisc"
72eb7bd2 210 depends on NET_CLS_ACT
52ab4ac2
TG
211 ---help---
212 Say Y here if you want to use classifiers for incoming packets.
1da177e4
LT
213 If unsure, say Y.
214
215 To compile this code as a module, choose M here: the
216 module will be called sch_ingress.
217
52ab4ac2 218comment "Classification"
1da177e4
LT
219
220config NET_CLS
52ab4ac2 221 boolean
1da177e4
LT
222
223config NET_CLS_BASIC
52ab4ac2 224 tristate "Elementary classification (BASIC)"
52ab4ac2 225 select NET_CLS
1da177e4
LT
226 ---help---
227 Say Y here if you want to be able to classify packets using
228 only extended matches and actions.
229
230 To compile this code as a module, choose M here: the
231 module will be called cls_basic.
232
233config NET_CLS_TCINDEX
52ab4ac2 234 tristate "Traffic-Control Index (TCINDEX)"
52ab4ac2
TG
235 select NET_CLS
236 ---help---
237 Say Y here if you want to be able to classify packets based on
238 traffic control indices. You will want this feature if you want
239 to implement Differentiated Services together with DSMARK.
1da177e4
LT
240
241 To compile this code as a module, choose M here: the
242 module will be called cls_tcindex.
243
244config NET_CLS_ROUTE4
52ab4ac2 245 tristate "Routing decision (ROUTE)"
1da177e4 246 select NET_CLS_ROUTE
52ab4ac2
TG
247 select NET_CLS
248 ---help---
249 If you say Y here, you will be able to classify packets
250 according to the route table entry they matched.
1da177e4
LT
251
252 To compile this code as a module, choose M here: the
253 module will be called cls_route.
254
255config NET_CLS_ROUTE
256 bool
1da177e4
LT
257
258config NET_CLS_FW
52ab4ac2 259 tristate "Netfilter mark (FW)"
52ab4ac2
TG
260 select NET_CLS
261 ---help---
262 If you say Y here, you will be able to classify packets
263 according to netfilter/firewall marks.
1da177e4
LT
264
265 To compile this code as a module, choose M here: the
266 module will be called cls_fw.
267
268config NET_CLS_U32
52ab4ac2 269 tristate "Universal 32bit comparisons w/ hashing (U32)"
52ab4ac2
TG
270 select NET_CLS
271 ---help---
3539c272 272 Say Y here to be able to classify packets using a universal
52ab4ac2 273 32bit pieces based comparison scheme.
1da177e4
LT
274
275 To compile this code as a module, choose M here: the
276 module will be called cls_u32.
277
278config CLS_U32_PERF
52ab4ac2 279 bool "Performance counters support"
1da177e4 280 depends on NET_CLS_U32
52ab4ac2
TG
281 ---help---
282 Say Y here to make u32 gather additional statistics useful for
283 fine tuning u32 classifiers.
1da177e4
LT
284
285config CLS_U32_MARK
52ab4ac2 286 bool "Netfilter marks support"
82e91ffe 287 depends on NET_CLS_U32
52ab4ac2
TG
288 ---help---
289 Say Y here to be able to use netfilter marks as u32 key.
1da177e4
LT
290
291config NET_CLS_RSVP
52ab4ac2 292 tristate "IPv4 Resource Reservation Protocol (RSVP)"
52ab4ac2 293 select NET_CLS
1da177e4
LT
294 ---help---
295 The Resource Reservation Protocol (RSVP) permits end systems to
296 request a minimum and maximum data flow rate for a connection; this
297 is important for real time data such as streaming sound or video.
298
299 Say Y here if you want to be able to classify outgoing packets based
300 on their RSVP requests.
301
302 To compile this code as a module, choose M here: the
303 module will be called cls_rsvp.
304
305config NET_CLS_RSVP6
52ab4ac2 306 tristate "IPv6 Resource Reservation Protocol (RSVP6)"
52ab4ac2 307 select NET_CLS
1da177e4
LT
308 ---help---
309 The Resource Reservation Protocol (RSVP) permits end systems to
310 request a minimum and maximum data flow rate for a connection; this
311 is important for real time data such as streaming sound or video.
312
313 Say Y here if you want to be able to classify outgoing packets based
99acaeb9 314 on their RSVP requests and you are using the IPv6 protocol.
1da177e4
LT
315
316 To compile this code as a module, choose M here: the
317 module will be called cls_rsvp6.
318
e5dfb815
PM
319config NET_CLS_FLOW
320 tristate "Flow classifier"
321 select NET_CLS
322 ---help---
323 If you say Y here, you will be able to classify packets based on
324 a configurable combination of packet keys. This is mostly useful
325 in combination with SFQ.
326
327 To compile this code as a module, choose M here: the
328 module will be called cls_flow.
329
f4009237 330config NET_CLS_CGROUP
8e039d84 331 tristate "Control Group Classifier"
f4009237
TG
332 select NET_CLS
333 depends on CGROUPS
334 ---help---
335 Say Y here if you want to classify packets based on the control
336 cgroup of their process.
337
8e039d84
BB
338 To compile this code as a module, choose M here: the
339 module will be called cls_cgroup.
340
1da177e4
LT
341config NET_EMATCH
342 bool "Extended Matches"
52ab4ac2 343 select NET_CLS
1da177e4
LT
344 ---help---
345 Say Y here if you want to use extended matches on top of classifiers
346 and select the extended matches below.
347
348 Extended matches are small classification helpers not worth writing
52ab4ac2 349 a separate classifier for.
1da177e4 350
52ab4ac2 351 A recent version of the iproute2 package is required to use
1da177e4
LT
352 extended matches.
353
354config NET_EMATCH_STACK
355 int "Stack size"
356 depends on NET_EMATCH
357 default "32"
358 ---help---
359 Size of the local stack variable used while evaluating the tree of
360 ematches. Limits the depth of the tree, i.e. the number of
b824979a 361 encapsulated precedences. Every level requires 4 bytes of additional
1da177e4
LT
362 stack space.
363
364config NET_EMATCH_CMP
365 tristate "Simple packet data comparison"
366 depends on NET_EMATCH
367 ---help---
368 Say Y here if you want to be able to classify packets based on
369 simple packet data comparisons for 8, 16, and 32bit values.
370
371 To compile this code as a module, choose M here: the
372 module will be called em_cmp.
373
374config NET_EMATCH_NBYTE
375 tristate "Multi byte comparison"
376 depends on NET_EMATCH
377 ---help---
378 Say Y here if you want to be able to classify packets based on
379 multiple byte comparisons mainly useful for IPv6 address comparisons.
380
381 To compile this code as a module, choose M here: the
382 module will be called em_nbyte.
383
384config NET_EMATCH_U32
52ab4ac2 385 tristate "U32 key"
1da177e4
LT
386 depends on NET_EMATCH
387 ---help---
388 Say Y here if you want to be able to classify packets using
389 the famous u32 key in combination with logic relations.
390
391 To compile this code as a module, choose M here: the
392 module will be called em_u32.
393
394config NET_EMATCH_META
395 tristate "Metadata"
396 depends on NET_EMATCH
397 ---help---
bb7e8c5a 398 Say Y here if you want to be able to classify packets based on
1da177e4
LT
399 metadata such as load average, netfilter attributes, socket
400 attributes and routing decisions.
401
402 To compile this code as a module, choose M here: the
403 module will be called em_meta.
404
d675c989
TG
405config NET_EMATCH_TEXT
406 tristate "Textsearch"
407 depends on NET_EMATCH
f2d368fa 408 select TEXTSEARCH
f7704347 409 select TEXTSEARCH_KMP
29cb9f9c 410 select TEXTSEARCH_BM
f7704347 411 select TEXTSEARCH_FSM
d675c989 412 ---help---
52ab4ac2 413 Say Y here if you want to be able to classify packets based on
f7704347 414 textsearch comparisons.
d675c989
TG
415
416 To compile this code as a module, choose M here: the
417 module will be called em_text.
418
1da177e4 419config NET_CLS_ACT
52ab4ac2 420 bool "Actions"
1da177e4 421 ---help---
52ab4ac2
TG
422 Say Y here if you want to use traffic control actions. Actions
423 get attached to classifiers and are invoked after a successful
424 classification. They are used to overwrite the classification
425 result, instantly drop or redirect packets, etc.
426
427 A recent version of the iproute2 package is required to use
428 extended matches.
1da177e4
LT
429
430config NET_ACT_POLICE
52ab4ac2 431 tristate "Traffic Policing"
1da177e4
LT
432 depends on NET_CLS_ACT
433 ---help---
52ab4ac2
TG
434 Say Y here if you want to do traffic policing, i.e. strict
435 bandwidth limiting. This action replaces the existing policing
436 module.
437
438 To compile this code as a module, choose M here: the
d4ae20b3 439 module will be called act_police.
1da177e4
LT
440
441config NET_ACT_GACT
52ab4ac2 442 tristate "Generic actions"
1da177e4
LT
443 depends on NET_CLS_ACT
444 ---help---
52ab4ac2
TG
445 Say Y here to take generic actions such as dropping and
446 accepting packets.
447
448 To compile this code as a module, choose M here: the
d4ae20b3 449 module will be called act_gact.
1da177e4
LT
450
451config GACT_PROB
52ab4ac2 452 bool "Probability support"
1da177e4
LT
453 depends on NET_ACT_GACT
454 ---help---
52ab4ac2 455 Say Y here to use the generic action randomly or deterministically.
1da177e4
LT
456
457config NET_ACT_MIRRED
52ab4ac2 458 tristate "Redirecting and Mirroring"
1da177e4
LT
459 depends on NET_CLS_ACT
460 ---help---
52ab4ac2
TG
461 Say Y here to allow packets to be mirrored or redirected to
462 other devices.
463
464 To compile this code as a module, choose M here: the
d4ae20b3 465 module will be called act_mirred.
1da177e4
LT
466
467config NET_ACT_IPT
52ab4ac2 468 tristate "IPtables targets"
1da177e4
LT
469 depends on NET_CLS_ACT && NETFILTER && IP_NF_IPTABLES
470 ---help---
3539c272 471 Say Y here to be able to invoke iptables targets after successful
52ab4ac2
TG
472 classification.
473
474 To compile this code as a module, choose M here: the
d4ae20b3 475 module will be called act_ipt.
1da177e4 476
b4219952
HX
477config NET_ACT_NAT
478 tristate "Stateless NAT"
479 depends on NET_CLS_ACT
b4219952
HX
480 ---help---
481 Say Y here to do stateless NAT on IPv4 packets. You should use
482 netfilter for NAT unless you know what you are doing.
483
484 To compile this code as a module, choose M here: the
d4ae20b3 485 module will be called act_nat.
b4219952 486
1da177e4 487config NET_ACT_PEDIT
52ab4ac2 488 tristate "Packet Editing"
1da177e4
LT
489 depends on NET_CLS_ACT
490 ---help---
52ab4ac2 491 Say Y here if you want to mangle the content of packets.
1da177e4 492
52ab4ac2 493 To compile this code as a module, choose M here: the
d4ae20b3 494 module will be called act_pedit.
1da177e4 495
db753079 496config NET_ACT_SIMP
52ab4ac2 497 tristate "Simple Example (Debug)"
db753079
JHS
498 depends on NET_CLS_ACT
499 ---help---
52ab4ac2
TG
500 Say Y here to add a simple action for demonstration purposes.
501 It is meant as an example and for debugging purposes. It will
502 print a configured policy string followed by the packet count
503 to the console for every packet that passes by.
504
505 If unsure, say N.
506
507 To compile this code as a module, choose M here: the
d4ae20b3 508 module will be called act_simple.
52ab4ac2 509
ca9b0e27
AD
510config NET_ACT_SKBEDIT
511 tristate "SKB Editing"
512 depends on NET_CLS_ACT
513 ---help---
514 Say Y here to change skb priority or queue_mapping settings.
515
516 If unsure, say N.
517
518 To compile this code as a module, choose M here: the
d4ae20b3 519 module will be called act_skbedit.
ca9b0e27 520
52ab4ac2
TG
521config NET_CLS_IND
522 bool "Incoming device classification"
05b8b0fa 523 depends on NET_CLS_U32 || NET_CLS_FW
52ab4ac2
TG
524 ---help---
525 Say Y here to extend the u32 and fw classifier to support
526 classification based on the incoming device. This option is
527 likely to disappear in favour of the metadata ematch.
528
05b8b0fa
RZ
529endif # NET_SCHED
530
85ef3e5c
RD
531config NET_SCH_FIFO
532 bool