mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-27 06:34:11 +08:00
546 lines
17 KiB
Plaintext
546 lines
17 KiB
Plaintext
#
|
|
# Traffic control configuration.
|
|
#
|
|
|
|
menu "QoS and/or fair queueing"
|
|
|
|
config NET_SCHED
|
|
bool "QoS and/or fair queueing"
|
|
---help---
|
|
When the kernel has several packets to send out over a network
|
|
device, it has to decide which ones to send first, which ones to
|
|
delay, and which ones to drop. This is the job of the queueing
|
|
disciplines, several different algorithms for how to do this
|
|
"fairly" have been proposed.
|
|
|
|
If you say N here, you will get the standard packet scheduler, which
|
|
is a FIFO (first come, first served). If you say Y here, you will be
|
|
able to choose from among several alternative algorithms which can
|
|
then be attached to different network devices. This is useful for
|
|
example if some of your network devices are real time devices that
|
|
need a certain minimum data flow rate, or if you need to limit the
|
|
maximum data flow rate for traffic which matches specified criteria.
|
|
This code is considered to be experimental.
|
|
|
|
To administer these schedulers, you'll need the user-level utilities
|
|
from the package iproute2+tc at <ftp://ftp.tux.org/pub/net/ip-routing/>.
|
|
That package also contains some documentation; for more, check out
|
|
<http://linux-net.osdl.org/index.php/Iproute2>.
|
|
|
|
This Quality of Service (QoS) support will enable you to use
|
|
Differentiated Services (diffserv) and Resource Reservation Protocol
|
|
(RSVP) on your Linux router if you also say Y to the corresponding
|
|
classifiers below. Documentation and software is at
|
|
<http://diffserv.sourceforge.net/>.
|
|
|
|
If you say Y here and to "/proc file system" below, you will be able
|
|
to read status information about packet schedulers from the file
|
|
/proc/net/psched.
|
|
|
|
The available schedulers are listed in the following questions; you
|
|
can say Y to as many as you like. If unsure, say N now.
|
|
|
|
if NET_SCHED
|
|
|
|
choice
|
|
prompt "Packet scheduler clock source"
|
|
default NET_SCH_CLK_GETTIMEOFDAY
|
|
---help---
|
|
Packet schedulers need a monotonic clock that increments at a static
|
|
rate. The kernel provides several suitable interfaces, each with
|
|
different properties:
|
|
|
|
- high resolution (us or better)
|
|
- fast to read (minimal locking, no i/o access)
|
|
- synchronized on all processors
|
|
- handles cpu clock frequency changes
|
|
|
|
but nothing provides all of the above.
|
|
|
|
config NET_SCH_CLK_JIFFIES
|
|
bool "Timer interrupt"
|
|
---help---
|
|
Say Y here if you want to use the timer interrupt (jiffies) as clock
|
|
source. This clock source is fast, synchronized on all processors and
|
|
handles cpu clock frequency changes, but its resolution is too low
|
|
for accurate shaping except at very low speed.
|
|
|
|
config NET_SCH_CLK_GETTIMEOFDAY
|
|
bool "gettimeofday"
|
|
---help---
|
|
Say Y here if you want to use gettimeofday as clock source. This clock
|
|
source has high resolution, is synchronized on all processors and
|
|
handles cpu clock frequency changes, but it is slow.
|
|
|
|
Choose this if you need a high resolution clock source but can't use
|
|
the CPU's cycle counter.
|
|
|
|
# don't allow on SMP x86 because they can have unsynchronized TSCs.
|
|
# gettimeofday is a good alternative
|
|
config NET_SCH_CLK_CPU
|
|
bool "CPU cycle counter"
|
|
depends on ((X86_TSC || X86_64) && !SMP) || ALPHA || SPARC64 || PPC64 || IA64
|
|
---help---
|
|
Say Y here if you want to use the CPU's cycle counter as clock source.
|
|
This is a cheap and high resolution clock source, but on some
|
|
architectures it is not synchronized on all processors and doesn't
|
|
handle cpu clock frequency changes.
|
|
|
|
The useable cycle counters are:
|
|
|
|
x86/x86_64 - Timestamp Counter
|
|
alpha - Cycle Counter
|
|
sparc64 - %ticks register
|
|
ppc64 - Time base
|
|
ia64 - Interval Time Counter
|
|
|
|
Choose this if your CPU's cycle counter is working properly.
|
|
|
|
endchoice
|
|
|
|
comment "Queueing/Scheduling"
|
|
|
|
config NET_SCH_CBQ
|
|
tristate "Class Based Queueing (CBQ)"
|
|
---help---
|
|
Say Y here if you want to use the Class-Based Queueing (CBQ) packet
|
|
scheduling algorithm. This algorithm classifies the waiting packets
|
|
into a tree-like hierarchy of classes; the leaves of this tree are
|
|
in turn scheduled by separate algorithms.
|
|
|
|
See the top of <file:net/sched/sch_cbq.c> for more details.
|
|
|
|
CBQ is a commonly used scheduler, so if you're unsure, you should
|
|
say Y here. Then say Y to all the queueing algorithms below that you
|
|
want to use as leaf disciplines.
|
|
|
|
To compile this code as a module, choose M here: the
|
|
module will be called sch_cbq.
|
|
|
|
config NET_SCH_HTB
|
|
tristate "Hierarchical Token Bucket (HTB)"
|
|
---help---
|
|
Say Y here if you want to use the Hierarchical Token Buckets (HTB)
|
|
packet scheduling algorithm. See
|
|
<http://luxik.cdi.cz/~devik/qos/htb/> for complete manual and
|
|
in-depth articles.
|
|
|
|
HTB is very similar to CBQ regarding its goals however is has
|
|
different properties and different algorithm.
|
|
|
|
To compile this code as a module, choose M here: the
|
|
module will be called sch_htb.
|
|
|
|
config NET_SCH_HFSC
|
|
tristate "Hierarchical Fair Service Curve (HFSC)"
|
|
---help---
|
|
Say Y here if you want to use the Hierarchical Fair Service Curve
|
|
(HFSC) packet scheduling algorithm.
|
|
|
|
To compile this code as a module, choose M here: the
|
|
module will be called sch_hfsc.
|
|
|
|
config NET_SCH_ATM
|
|
tristate "ATM Virtual Circuits (ATM)"
|
|
depends on ATM
|
|
---help---
|
|
Say Y here if you want to use the ATM pseudo-scheduler. This
|
|
provides a framework for invoking classifiers, which in turn
|
|
select classes of this queuing discipline. Each class maps
|
|
the flow(s) it is handling to a given virtual circuit.
|
|
|
|
See the top of <file:net/sched/sch_atm.c>) for more details.
|
|
|
|
To compile this code as a module, choose M here: the
|
|
module will be called sch_atm.
|
|
|
|
config NET_SCH_PRIO
|
|
tristate "Multi Band Priority Queueing (PRIO)"
|
|
---help---
|
|
Say Y here if you want to use an n-band priority queue packet
|
|
scheduler.
|
|
|
|
To compile this code as a module, choose M here: the
|
|
module will be called sch_prio.
|
|
|
|
config NET_SCH_RED
|
|
tristate "Random Early Detection (RED)"
|
|
---help---
|
|
Say Y here if you want to use the Random Early Detection (RED)
|
|
packet scheduling algorithm.
|
|
|
|
See the top of <file:net/sched/sch_red.c> for more details.
|
|
|
|
To compile this code as a module, choose M here: the
|
|
module will be called sch_red.
|
|
|
|
config NET_SCH_SFQ
|
|
tristate "Stochastic Fairness Queueing (SFQ)"
|
|
---help---
|
|
Say Y here if you want to use the Stochastic Fairness Queueing (SFQ)
|
|
packet scheduling algorithm .
|
|
|
|
See the top of <file:net/sched/sch_sfq.c> for more details.
|
|
|
|
To compile this code as a module, choose M here: the
|
|
module will be called sch_sfq.
|
|
|
|
config NET_SCH_TEQL
|
|
tristate "True Link Equalizer (TEQL)"
|
|
---help---
|
|
Say Y here if you want to use the True Link Equalizer (TLE) packet
|
|
scheduling algorithm. This queueing discipline allows the combination
|
|
of several physical devices into one virtual device.
|
|
|
|
See the top of <file:net/sched/sch_teql.c> for more details.
|
|
|
|
To compile this code as a module, choose M here: the
|
|
module will be called sch_teql.
|
|
|
|
config NET_SCH_TBF
|
|
tristate "Token Bucket Filter (TBF)"
|
|
---help---
|
|
Say Y here if you want to use the Token Bucket Filter (TBF) packet
|
|
scheduling algorithm.
|
|
|
|
See the top of <file:net/sched/sch_tbf.c> for more details.
|
|
|
|
To compile this code as a module, choose M here: the
|
|
module will be called sch_tbf.
|
|
|
|
config NET_SCH_GRED
|
|
tristate "Generic Random Early Detection (GRED)"
|
|
---help---
|
|
Say Y here if you want to use the Generic Random Early Detection
|
|
(GRED) packet scheduling algorithm for some of your network devices
|
|
(see the top of <file:net/sched/sch_red.c> for details and
|
|
references about the algorithm).
|
|
|
|
To compile this code as a module, choose M here: the
|
|
module will be called sch_gred.
|
|
|
|
config NET_SCH_DSMARK
|
|
tristate "Differentiated Services marker (DSMARK)"
|
|
---help---
|
|
Say Y if you want to schedule packets according to the
|
|
Differentiated Services architecture proposed in RFC 2475.
|
|
Technical information on this method, with pointers to associated
|
|
RFCs, is available at <http://www.gta.ufrj.br/diffserv/>.
|
|
|
|
To compile this code as a module, choose M here: the
|
|
module will be called sch_dsmark.
|
|
|
|
config NET_SCH_NETEM
|
|
tristate "Network emulator (NETEM)"
|
|
---help---
|
|
Say Y if you want to emulate network delay, loss, and packet
|
|
re-ordering. This is often useful to simulate networks when
|
|
testing applications or protocols.
|
|
|
|
To compile this driver as a module, choose M here: the module
|
|
will be called sch_netem.
|
|
|
|
If unsure, say N.
|
|
|
|
config NET_SCH_INGRESS
|
|
tristate "Ingress Qdisc"
|
|
---help---
|
|
Say Y here if you want to use classifiers for incoming packets.
|
|
If unsure, say Y.
|
|
|
|
To compile this code as a module, choose M here: the
|
|
module will be called sch_ingress.
|
|
|
|
comment "Classification"
|
|
|
|
config NET_CLS
|
|
boolean
|
|
|
|
config NET_CLS_BASIC
|
|
tristate "Elementary classification (BASIC)"
|
|
select NET_CLS
|
|
---help---
|
|
Say Y here if you want to be able to classify packets using
|
|
only extended matches and actions.
|
|
|
|
To compile this code as a module, choose M here: the
|
|
module will be called cls_basic.
|
|
|
|
config NET_CLS_TCINDEX
|
|
tristate "Traffic-Control Index (TCINDEX)"
|
|
select NET_CLS
|
|
---help---
|
|
Say Y here if you want to be able to classify packets based on
|
|
traffic control indices. You will want this feature if you want
|
|
to implement Differentiated Services together with DSMARK.
|
|
|
|
To compile this code as a module, choose M here: the
|
|
module will be called cls_tcindex.
|
|
|
|
config NET_CLS_ROUTE4
|
|
tristate "Routing decision (ROUTE)"
|
|
select NET_CLS_ROUTE
|
|
select NET_CLS
|
|
---help---
|
|
If you say Y here, you will be able to classify packets
|
|
according to the route table entry they matched.
|
|
|
|
To compile this code as a module, choose M here: the
|
|
module will be called cls_route.
|
|
|
|
config NET_CLS_ROUTE
|
|
bool
|
|
|
|
config NET_CLS_FW
|
|
tristate "Netfilter mark (FW)"
|
|
select NET_CLS
|
|
---help---
|
|
If you say Y here, you will be able to classify packets
|
|
according to netfilter/firewall marks.
|
|
|
|
To compile this code as a module, choose M here: the
|
|
module will be called cls_fw.
|
|
|
|
config NET_CLS_U32
|
|
tristate "Universal 32bit comparisons w/ hashing (U32)"
|
|
select NET_CLS
|
|
---help---
|
|
Say Y here to be able to classify packets using a universal
|
|
32bit pieces based comparison scheme.
|
|
|
|
To compile this code as a module, choose M here: the
|
|
module will be called cls_u32.
|
|
|
|
config CLS_U32_PERF
|
|
bool "Performance counters support"
|
|
depends on NET_CLS_U32
|
|
---help---
|
|
Say Y here to make u32 gather additional statistics useful for
|
|
fine tuning u32 classifiers.
|
|
|
|
config CLS_U32_MARK
|
|
bool "Netfilter marks support"
|
|
depends on NET_CLS_U32 && NETFILTER
|
|
---help---
|
|
Say Y here to be able to use netfilter marks as u32 key.
|
|
|
|
config NET_CLS_RSVP
|
|
tristate "IPv4 Resource Reservation Protocol (RSVP)"
|
|
select NET_CLS
|
|
select NET_ESTIMATOR
|
|
---help---
|
|
The Resource Reservation Protocol (RSVP) permits end systems to
|
|
request a minimum and maximum data flow rate for a connection; this
|
|
is important for real time data such as streaming sound or video.
|
|
|
|
Say Y here if you want to be able to classify outgoing packets based
|
|
on their RSVP requests.
|
|
|
|
To compile this code as a module, choose M here: the
|
|
module will be called cls_rsvp.
|
|
|
|
config NET_CLS_RSVP6
|
|
tristate "IPv6 Resource Reservation Protocol (RSVP6)"
|
|
select NET_CLS
|
|
select NET_ESTIMATOR
|
|
---help---
|
|
The Resource Reservation Protocol (RSVP) permits end systems to
|
|
request a minimum and maximum data flow rate for a connection; this
|
|
is important for real time data such as streaming sound or video.
|
|
|
|
Say Y here if you want to be able to classify outgoing packets based
|
|
on their RSVP requests and you are using the IPv6.
|
|
|
|
To compile this code as a module, choose M here: the
|
|
module will be called cls_rsvp6.
|
|
|
|
config NET_EMATCH
|
|
bool "Extended Matches"
|
|
select NET_CLS
|
|
---help---
|
|
Say Y here if you want to use extended matches on top of classifiers
|
|
and select the extended matches below.
|
|
|
|
Extended matches are small classification helpers not worth writing
|
|
a separate classifier for.
|
|
|
|
A recent version of the iproute2 package is required to use
|
|
extended matches.
|
|
|
|
config NET_EMATCH_STACK
|
|
int "Stack size"
|
|
depends on NET_EMATCH
|
|
default "32"
|
|
---help---
|
|
Size of the local stack variable used while evaluating the tree of
|
|
ematches. Limits the depth of the tree, i.e. the number of
|
|
encapsulated precedences. Every level requires 4 bytes of additional
|
|
stack space.
|
|
|
|
config NET_EMATCH_CMP
|
|
tristate "Simple packet data comparison"
|
|
depends on NET_EMATCH
|
|
---help---
|
|
Say Y here if you want to be able to classify packets based on
|
|
simple packet data comparisons for 8, 16, and 32bit values.
|
|
|
|
To compile this code as a module, choose M here: the
|
|
module will be called em_cmp.
|
|
|
|
config NET_EMATCH_NBYTE
|
|
tristate "Multi byte comparison"
|
|
depends on NET_EMATCH
|
|
---help---
|
|
Say Y here if you want to be able to classify packets based on
|
|
multiple byte comparisons mainly useful for IPv6 address comparisons.
|
|
|
|
To compile this code as a module, choose M here: the
|
|
module will be called em_nbyte.
|
|
|
|
config NET_EMATCH_U32
|
|
tristate "U32 key"
|
|
depends on NET_EMATCH
|
|
---help---
|
|
Say Y here if you want to be able to classify packets using
|
|
the famous u32 key in combination with logic relations.
|
|
|
|
To compile this code as a module, choose M here: the
|
|
module will be called em_u32.
|
|
|
|
config NET_EMATCH_META
|
|
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
|
|
tristate "Textsearch"
|
|
depends on NET_EMATCH
|
|
select TEXTSEARCH
|
|
select TEXTSEARCH_KMP
|
|
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_CLS_ACT
|
|
bool "Actions"
|
|
select NET_ESTIMATOR
|
|
---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 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 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 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 ipt.
|
|
|
|
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 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 simple.
|
|
|
|
config NET_CLS_POLICE
|
|
bool "Traffic Policing (obsolete)"
|
|
depends on NET_CLS_ACT!=y
|
|
select NET_ESTIMATOR
|
|
---help---
|
|
Say Y here if you want to do traffic policing, i.e. strict
|
|
bandwidth limiting. This option is obsoleted by the traffic
|
|
policer implemented as action, it stays here for compatibility
|
|
reasons.
|
|
|
|
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.
|
|
|
|
config NET_ESTIMATOR
|
|
bool "Rate estimator"
|
|
---help---
|
|
Say Y here to allow using rate estimators to estimate the current
|
|
rate-of-flow for network devices, queues, etc. This module is
|
|
automatically selected if needed but can be selected manually for
|
|
statistical purposes.
|
|
|
|
endif # NET_SCHED
|
|
|
|
endmenu
|