701 lines
22 KiB
Plaintext
701 lines
22 KiB
Plaintext
#
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# Traffic control configuration.
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#
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menuconfig NET_SCHED
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bool "QoS and/or fair queueing"
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select NET_SCH_FIFO
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---help---
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When the kernel has several packets to send out over a network
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device, it has to decide which ones to send first, which ones to
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delay, and which ones to drop. This is the job of the queueing
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disciplines, several different algorithms for how to do this
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"fairly" have been proposed.
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If you say N here, you will get the standard packet scheduler, which
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is a FIFO (first come, first served). If you say Y here, you will be
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able to choose from among several alternative algorithms which can
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then be attached to different network devices. This is useful for
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example if some of your network devices are real time devices that
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need a certain minimum data flow rate, or if you need to limit the
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maximum data flow rate for traffic which matches specified criteria.
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This code is considered to be experimental.
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To administer these schedulers, you'll need the user-level utilities
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from the package iproute2+tc at <ftp://ftp.tux.org/pub/net/ip-routing/>.
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That package also contains some documentation; for more, check out
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<http://www.linuxfoundation.org/collaborate/workgroups/networking/iproute2>.
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This Quality of Service (QoS) support will enable you to use
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Differentiated Services (diffserv) and Resource Reservation Protocol
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(RSVP) on your Linux router if you also say Y to the corresponding
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classifiers below. Documentation and software is at
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<http://diffserv.sourceforge.net/>.
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If you say Y here and to "/proc file system" below, you will be able
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to read status information about packet schedulers from the file
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/proc/net/psched.
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The available schedulers are listed in the following questions; you
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can say Y to as many as you like. If unsure, say N now.
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if NET_SCHED
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comment "Queueing/Scheduling"
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config NET_SCH_CBQ
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tristate "Class Based Queueing (CBQ)"
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---help---
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Say Y here if you want to use the Class-Based Queueing (CBQ) packet
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scheduling algorithm. This algorithm classifies the waiting packets
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into a tree-like hierarchy of classes; the leaves of this tree are
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in turn scheduled by separate algorithms.
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See the top of <file:net/sched/sch_cbq.c> for more details.
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CBQ is a commonly used scheduler, so if you're unsure, you should
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say Y here. Then say Y to all the queueing algorithms below that you
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want to use as leaf disciplines.
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To compile this code as a module, choose M here: the
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module will be called sch_cbq.
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config NET_SCH_HTB
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tristate "Hierarchical Token Bucket (HTB)"
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---help---
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Say Y here if you want to use the Hierarchical Token Buckets (HTB)
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packet scheduling algorithm. See
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<http://luxik.cdi.cz/~devik/qos/htb/> for complete manual and
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in-depth articles.
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HTB is very similar to CBQ regarding its goals however is has
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different properties and different algorithm.
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To compile this code as a module, choose M here: the
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module will be called sch_htb.
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config NET_SCH_HFSC
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tristate "Hierarchical Fair Service Curve (HFSC)"
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---help---
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Say Y here if you want to use the Hierarchical Fair Service Curve
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(HFSC) packet scheduling algorithm.
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To compile this code as a module, choose M here: the
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module will be called sch_hfsc.
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config NET_SCH_ATM
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tristate "ATM Virtual Circuits (ATM)"
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depends on ATM
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---help---
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Say Y here if you want to use the ATM pseudo-scheduler. This
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provides a framework for invoking classifiers, which in turn
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select classes of this queuing discipline. Each class maps
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the flow(s) it is handling to a given virtual circuit.
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See the top of <file:net/sched/sch_atm.c> for more details.
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To compile this code as a module, choose M here: the
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module will be called sch_atm.
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config NET_SCH_PRIO
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tristate "Multi Band Priority Queueing (PRIO)"
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---help---
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Say Y here if you want to use an n-band priority queue packet
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scheduler.
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To compile this code as a module, choose M here: the
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module will be called sch_prio.
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config NET_SCH_MULTIQ
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tristate "Hardware Multiqueue-aware Multi Band Queuing (MULTIQ)"
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---help---
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Say Y here if you want to use an n-band queue packet scheduler
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to support devices that have multiple hardware transmit queues.
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To compile this code as a module, choose M here: the
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module will be called sch_multiq.
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config NET_SCH_RED
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tristate "Random Early Detection (RED)"
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---help---
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Say Y here if you want to use the Random Early Detection (RED)
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packet scheduling algorithm.
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See the top of <file:net/sched/sch_red.c> for more details.
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To compile this code as a module, choose M here: the
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module will be called sch_red.
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config NET_SCH_SFB
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tristate "Stochastic Fair Blue (SFB)"
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---help---
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Say Y here if you want to use the Stochastic Fair Blue (SFB)
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packet scheduling algorithm.
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See the top of <file:net/sched/sch_sfb.c> for more details.
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To compile this code as a module, choose M here: the
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module will be called sch_sfb.
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config NET_SCH_SFQ
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tristate "Stochastic Fairness Queueing (SFQ)"
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---help---
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Say Y here if you want to use the Stochastic Fairness Queueing (SFQ)
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packet scheduling algorithm.
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See the top of <file:net/sched/sch_sfq.c> for more details.
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To compile this code as a module, choose M here: the
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module will be called sch_sfq.
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config NET_SCH_TEQL
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tristate "True Link Equalizer (TEQL)"
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---help---
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Say Y here if you want to use the True Link Equalizer (TLE) packet
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scheduling algorithm. This queueing discipline allows the combination
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of several physical devices into one virtual device.
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See the top of <file:net/sched/sch_teql.c> for more details.
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To compile this code as a module, choose M here: the
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module will be called sch_teql.
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config NET_SCH_TBF
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tristate "Token Bucket Filter (TBF)"
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---help---
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Say Y here if you want to use the Token Bucket Filter (TBF) packet
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scheduling algorithm.
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See the top of <file:net/sched/sch_tbf.c> for more details.
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To compile this code as a module, choose M here: the
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module will be called sch_tbf.
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config NET_SCH_GRED
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tristate "Generic Random Early Detection (GRED)"
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---help---
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Say Y here if you want to use the Generic Random Early Detection
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(GRED) packet scheduling algorithm for some of your network devices
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(see the top of <file:net/sched/sch_red.c> for details and
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references about the algorithm).
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To compile this code as a module, choose M here: the
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module will be called sch_gred.
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config NET_SCH_DSMARK
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tristate "Differentiated Services marker (DSMARK)"
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---help---
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Say Y if you want to schedule packets according to the
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Differentiated Services architecture proposed in RFC 2475.
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Technical information on this method, with pointers to associated
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RFCs, is available at <http://www.gta.ufrj.br/diffserv/>.
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To compile this code as a module, choose M here: the
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module will be called sch_dsmark.
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config NET_SCH_NETEM
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tristate "Network emulator (NETEM)"
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---help---
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Say Y if you want to emulate network delay, loss, and packet
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re-ordering. This is often useful to simulate networks when
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testing applications or protocols.
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To compile this driver as a module, choose M here: the module
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will be called sch_netem.
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If unsure, say N.
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config NET_SCH_DRR
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tristate "Deficit Round Robin scheduler (DRR)"
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help
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Say Y here if you want to use the Deficit Round Robin (DRR) packet
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scheduling algorithm.
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To compile this driver as a module, choose M here: the module
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will be called sch_drr.
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If unsure, say N.
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config NET_SCH_MQPRIO
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tristate "Multi-queue priority scheduler (MQPRIO)"
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help
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Say Y here if you want to use the Multi-queue Priority scheduler.
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This scheduler allows QOS to be offloaded on NICs that have support
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for offloading QOS schedulers.
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To compile this driver as a module, choose M here: the module will
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be called sch_mqprio.
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If unsure, say N.
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config NET_SCH_CHOKE
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tristate "CHOose and Keep responsive flow scheduler (CHOKE)"
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help
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Say Y here if you want to use the CHOKe packet scheduler (CHOose
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and Keep for responsive flows, CHOose and Kill for unresponsive
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flows). This is a variation of RED which trys to penalize flows
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that monopolize the queue.
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To compile this code as a module, choose M here: the
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module will be called sch_choke.
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config NET_SCH_QFQ
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tristate "Quick Fair Queueing scheduler (QFQ)"
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help
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Say Y here if you want to use the Quick Fair Queueing Scheduler (QFQ)
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packet scheduling algorithm.
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To compile this driver as a module, choose M here: the module
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will be called sch_qfq.
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If unsure, say N.
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config NET_SCH_CODEL
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tristate "Controlled Delay AQM (CODEL)"
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help
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Say Y here if you want to use the Controlled Delay (CODEL)
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packet scheduling algorithm.
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To compile this driver as a module, choose M here: the module
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will be called sch_codel.
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If unsure, say N.
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config NET_SCH_FQ_CODEL
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tristate "Fair Queue Controlled Delay AQM (FQ_CODEL)"
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help
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Say Y here if you want to use the FQ Controlled Delay (FQ_CODEL)
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packet scheduling algorithm.
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To compile this driver as a module, choose M here: the module
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will be called sch_fq_codel.
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If unsure, say N.
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config NET_SCH_FQ
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tristate "Fair Queue"
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help
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Say Y here if you want to use the FQ packet scheduling algorithm.
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FQ does flow separation, and is able to respect pacing requirements
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set by TCP stack into sk->sk_pacing_rate (for localy generated
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traffic)
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To compile this driver as a module, choose M here: the module
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will be called sch_fq.
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If unsure, say N.
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config NET_SCH_HHF
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tristate "Heavy-Hitter Filter (HHF)"
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help
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Say Y here if you want to use the Heavy-Hitter Filter (HHF)
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packet scheduling algorithm.
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To compile this driver as a module, choose M here: the module
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will be called sch_hhf.
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config NET_SCH_PIE
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tristate "Proportional Integral controller Enhanced (PIE) scheduler"
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help
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Say Y here if you want to use the Proportional Integral controller
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Enhanced scheduler packet scheduling algorithm.
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For more information, please see
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http://tools.ietf.org/html/draft-pan-tsvwg-pie-00
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To compile this driver as a module, choose M here: the module
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will be called sch_pie.
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If unsure, say N.
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config NET_SCH_INGRESS
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tristate "Ingress Qdisc"
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depends on NET_CLS_ACT
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---help---
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Say Y here if you want to use classifiers for incoming packets.
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If unsure, say Y.
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To compile this code as a module, choose M here: the
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module will be called sch_ingress.
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config NET_SCH_PLUG
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tristate "Plug network traffic until release (PLUG)"
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---help---
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This queuing discipline allows userspace to plug/unplug a network
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output queue, using the netlink interface. When it receives an
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enqueue command it inserts a plug into the outbound queue that
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causes following packets to enqueue until a dequeue command arrives
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over netlink, causing the plug to be removed and resuming the normal
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packet flow.
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This module also provides a generic "network output buffering"
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functionality (aka output commit), wherein upon arrival of a dequeue
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command, only packets up to the first plug are released for delivery.
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The Remus HA project uses this module to enable speculative execution
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of virtual machines by allowing the generated network output to be rolled
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back if needed.
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For more information, please refer to http://wiki.xensource.com/xenwiki/Remus
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Say Y here if you are using this kernel for Xen dom0 and
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want to protect Xen guests with Remus.
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To compile this code as a module, choose M here: the
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module will be called sch_plug.
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comment "Classification"
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config NET_CLS
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boolean
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config NET_CLS_BASIC
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tristate "Elementary classification (BASIC)"
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select NET_CLS
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---help---
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Say Y here if you want to be able to classify packets using
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only extended matches and actions.
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To compile this code as a module, choose M here: the
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module will be called cls_basic.
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config NET_CLS_TCINDEX
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tristate "Traffic-Control Index (TCINDEX)"
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select NET_CLS
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---help---
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Say Y here if you want to be able to classify packets based on
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traffic control indices. You will want this feature if you want
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to implement Differentiated Services together with DSMARK.
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To compile this code as a module, choose M here: the
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module will be called cls_tcindex.
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config NET_CLS_ROUTE4
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tristate "Routing decision (ROUTE)"
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depends on INET
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select IP_ROUTE_CLASSID
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select NET_CLS
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---help---
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If you say Y here, you will be able to classify packets
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according to the route table entry they matched.
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To compile this code as a module, choose M here: the
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module will be called cls_route.
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config NET_CLS_FW
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tristate "Netfilter mark (FW)"
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select NET_CLS
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---help---
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If you say Y here, you will be able to classify packets
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according to netfilter/firewall marks.
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To compile this code as a module, choose M here: the
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module will be called cls_fw.
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config NET_CLS_U32
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tristate "Universal 32bit comparisons w/ hashing (U32)"
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select NET_CLS
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---help---
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Say Y here to be able to classify packets using a universal
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32bit pieces based comparison scheme.
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To compile this code as a module, choose M here: the
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module will be called cls_u32.
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config CLS_U32_PERF
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bool "Performance counters support"
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depends on NET_CLS_U32
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---help---
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Say Y here to make u32 gather additional statistics useful for
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fine tuning u32 classifiers.
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config CLS_U32_MARK
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bool "Netfilter marks support"
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depends on NET_CLS_U32
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---help---
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Say Y here to be able to use netfilter marks as u32 key.
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config NET_CLS_RSVP
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tristate "IPv4 Resource Reservation Protocol (RSVP)"
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select NET_CLS
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---help---
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The Resource Reservation Protocol (RSVP) permits end systems to
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request a minimum and maximum data flow rate for a connection; this
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is important for real time data such as streaming sound or video.
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Say Y here if you want to be able to classify outgoing packets based
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on their RSVP requests.
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To compile this code as a module, choose M here: the
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module will be called cls_rsvp.
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config NET_CLS_RSVP6
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tristate "IPv6 Resource Reservation Protocol (RSVP6)"
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select NET_CLS
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---help---
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The Resource Reservation Protocol (RSVP) permits end systems to
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request a minimum and maximum data flow rate for a connection; this
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is important for real time data such as streaming sound or video.
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Say Y here if you want to be able to classify outgoing packets based
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on their RSVP requests and you are using the IPv6 protocol.
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To compile this code as a module, choose M here: the
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module will be called cls_rsvp6.
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config NET_CLS_FLOW
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tristate "Flow classifier"
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select NET_CLS
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---help---
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If you say Y here, you will be able to classify packets based on
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a configurable combination of packet keys. This is mostly useful
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in combination with SFQ.
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To compile this code as a module, choose M here: the
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module will be called cls_flow.
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config NET_CLS_CGROUP
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tristate "Control Group Classifier"
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select NET_CLS
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select CGROUP_NET_CLASSID
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depends on CGROUPS
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---help---
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Say Y here if you want to classify packets based on the control
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cgroup of their process.
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To compile this code as a module, choose M here: the
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module will be called cls_cgroup.
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config NET_CLS_BPF
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tristate "BPF-based classifier"
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select NET_CLS
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---help---
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If you say Y here, you will be able to classify packets based on
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programmable BPF (JIT'ed) filters as an alternative to ematches.
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To compile this code as a module, choose M here: the module will
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be called cls_bpf.
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config NET_EMATCH
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bool "Extended Matches"
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select NET_CLS
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---help---
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Say Y here if you want to use extended matches on top of classifiers
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and select the extended matches below.
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Extended matches are small classification helpers not worth writing
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a separate classifier for.
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A recent version of the iproute2 package is required to use
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extended matches.
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config NET_EMATCH_STACK
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int "Stack size"
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depends on NET_EMATCH
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default "32"
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---help---
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Size of the local stack variable used while evaluating the tree of
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ematches. Limits the depth of the tree, i.e. the number of
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encapsulated precedences. Every level requires 4 bytes of additional
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stack space.
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config NET_EMATCH_CMP
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tristate "Simple packet data comparison"
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depends on NET_EMATCH
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---help---
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Say Y here if you want to be able to classify packets based on
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simple packet data comparisons for 8, 16, and 32bit values.
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To compile this code as a module, choose M here: the
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module will be called em_cmp.
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config NET_EMATCH_NBYTE
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tristate "Multi byte comparison"
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depends on NET_EMATCH
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---help---
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Say Y here if you want to be able to classify packets based on
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multiple byte comparisons mainly useful for IPv6 address comparisons.
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To compile this code as a module, choose M here: the
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module will be called em_nbyte.
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config NET_EMATCH_U32
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tristate "U32 key"
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depends on NET_EMATCH
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---help---
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Say Y here if you want to be able to classify packets using
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the famous u32 key in combination with logic relations.
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To compile this code as a module, choose M here: the
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|
module will be called em_u32.
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|
|
|
config NET_EMATCH_META
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|
tristate "Metadata"
|
|
depends on NET_EMATCH
|
|
---help---
|
|
Say Y here if you want to be able to classify packets based on
|
|
metadata such as load average, netfilter attributes, socket
|
|
attributes and routing decisions.
|
|
|
|
To compile this code as a module, choose M here: the
|
|
module will be called em_meta.
|
|
|
|
config NET_EMATCH_TEXT
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|
tristate "Textsearch"
|
|
depends on NET_EMATCH
|
|
select TEXTSEARCH
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|
select TEXTSEARCH_KMP
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|
select TEXTSEARCH_BM
|
|
select TEXTSEARCH_FSM
|
|
---help---
|
|
Say Y here if you want to be able to classify packets based on
|
|
textsearch comparisons.
|
|
|
|
To compile this code as a module, choose M here: the
|
|
module will be called em_text.
|
|
|
|
config NET_EMATCH_CANID
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|
tristate "CAN Identifier"
|
|
depends on NET_EMATCH && (CAN=y || CAN=m)
|
|
---help---
|
|
Say Y here if you want to be able to classify CAN frames based
|
|
on CAN Identifier.
|
|
|
|
To compile this code as a module, choose M here: the
|
|
module will be called em_canid.
|
|
|
|
config NET_EMATCH_IPSET
|
|
tristate "IPset"
|
|
depends on NET_EMATCH && IP_SET
|
|
---help---
|
|
Say Y here if you want to be able to classify packets based on
|
|
ipset membership.
|
|
|
|
To compile this code as a module, choose M here: the
|
|
module will be called em_ipset.
|
|
|
|
config NET_CLS_ACT
|
|
bool "Actions"
|
|
---help---
|
|
Say Y here if you want to use traffic control actions. Actions
|
|
get attached to classifiers and are invoked after a successful
|
|
classification. They are used to overwrite the classification
|
|
result, instantly drop or redirect packets, etc.
|
|
|
|
A recent version of the iproute2 package is required to use
|
|
extended matches.
|
|
|
|
config NET_ACT_POLICE
|
|
tristate "Traffic Policing"
|
|
depends on NET_CLS_ACT
|
|
---help---
|
|
Say Y here if you want to do traffic policing, i.e. strict
|
|
bandwidth limiting. This action replaces the existing policing
|
|
module.
|
|
|
|
To compile this code as a module, choose M here: the
|
|
module will be called act_police.
|
|
|
|
config NET_ACT_GACT
|
|
tristate "Generic actions"
|
|
depends on NET_CLS_ACT
|
|
---help---
|
|
Say Y here to take generic actions such as dropping and
|
|
accepting packets.
|
|
|
|
To compile this code as a module, choose M here: the
|
|
module will be called act_gact.
|
|
|
|
config GACT_PROB
|
|
bool "Probability support"
|
|
depends on NET_ACT_GACT
|
|
---help---
|
|
Say Y here to use the generic action randomly or deterministically.
|
|
|
|
config NET_ACT_MIRRED
|
|
tristate "Redirecting and Mirroring"
|
|
depends on NET_CLS_ACT
|
|
---help---
|
|
Say Y here to allow packets to be mirrored or redirected to
|
|
other devices.
|
|
|
|
To compile this code as a module, choose M here: the
|
|
module will be called act_mirred.
|
|
|
|
config NET_ACT_IPT
|
|
tristate "IPtables targets"
|
|
depends on NET_CLS_ACT && NETFILTER && IP_NF_IPTABLES
|
|
---help---
|
|
Say Y here to be able to invoke iptables targets after successful
|
|
classification.
|
|
|
|
To compile this code as a module, choose M here: the
|
|
module will be called act_ipt.
|
|
|
|
config NET_ACT_NAT
|
|
tristate "Stateless NAT"
|
|
depends on NET_CLS_ACT
|
|
---help---
|
|
Say Y here to do stateless NAT on IPv4 packets. You should use
|
|
netfilter for NAT unless you know what you are doing.
|
|
|
|
To compile this code as a module, choose M here: the
|
|
module will be called act_nat.
|
|
|
|
config NET_ACT_PEDIT
|
|
tristate "Packet Editing"
|
|
depends on NET_CLS_ACT
|
|
---help---
|
|
Say Y here if you want to mangle the content of packets.
|
|
|
|
To compile this code as a module, choose M here: the
|
|
module will be called act_pedit.
|
|
|
|
config NET_ACT_SIMP
|
|
tristate "Simple Example (Debug)"
|
|
depends on NET_CLS_ACT
|
|
---help---
|
|
Say Y here to add a simple action for demonstration purposes.
|
|
It is meant as an example and for debugging purposes. It will
|
|
print a configured policy string followed by the packet count
|
|
to the console for every packet that passes by.
|
|
|
|
If unsure, say N.
|
|
|
|
To compile this code as a module, choose M here: the
|
|
module will be called act_simple.
|
|
|
|
config NET_ACT_SKBEDIT
|
|
tristate "SKB Editing"
|
|
depends on NET_CLS_ACT
|
|
---help---
|
|
Say Y here to change skb priority or queue_mapping settings.
|
|
|
|
If unsure, say N.
|
|
|
|
To compile this code as a module, choose M here: the
|
|
module will be called act_skbedit.
|
|
|
|
config NET_ACT_CSUM
|
|
tristate "Checksum Updating"
|
|
depends on NET_CLS_ACT && INET
|
|
---help---
|
|
Say Y here to update some common checksum after some direct
|
|
packet alterations.
|
|
|
|
To compile this code as a module, choose M here: the
|
|
module will be called act_csum.
|
|
|
|
config NET_CLS_IND
|
|
bool "Incoming device classification"
|
|
depends on NET_CLS_U32 || NET_CLS_FW
|
|
---help---
|
|
Say Y here to extend the u32 and fw classifier to support
|
|
classification based on the incoming device. This option is
|
|
likely to disappear in favour of the metadata ematch.
|
|
|
|
endif # NET_SCHED
|
|
|
|
config NET_SCH_FIFO
|
|
bool
|