1 # SPDX-License-Identifier: GPL-2.0-only
2 #
3 # Network configuration
4 #
5
6 menuconfig NET
7 bool "Networking support"
8 select NLATTR
9 select GENERIC_NET_UTILS
10 select BPF
11 help
12 Unless you really know what you are
13 The reason is that some programs nee
14 when running on a stand-alone machin
15 other computer.
16
17 If you are upgrading from an older k
18 should consider updating your networ
19 in the kernel and the tools often go
20 contained in the package net-tools,
21 of which are given in <file:Document
22
23 For a general introduction to Linux
24 recommended to read the NET-HOWTO, a
25 <http://www.tldp.org/docs.html#howto
26
27 if NET
28
29 config WANT_COMPAT_NETLINK_MESSAGES
30 bool
31 help
32 This option can be selected by other
33 netlink messages.
34
35 config COMPAT_NETLINK_MESSAGES
36 def_bool y
37 depends on COMPAT
38 depends on WEXT_CORE || WANT_COMPAT_NE
39 help
40 This option makes it possible to sen
41 to tasks depending on whether the ta
42 achieve this, you need to set skb_sh
43 compat skb before sending the skb, t
44 which message to actually pass to th
45
46 Newly written code should NEVER need
47 compat-independent messages instead!
48
49 config NET_INGRESS
50 bool
51
52 config NET_EGRESS
53 bool
54
55 config NET_XGRESS
56 select NET_INGRESS
57 select NET_EGRESS
58 bool
59
60 config NET_REDIRECT
61 bool
62
63 config SKB_DECRYPTED
64 bool
65
66 config SKB_EXTENSIONS
67 bool
68
69 config NET_DEVMEM
70 def_bool y
71 depends on DMA_SHARED_BUFFER
72 depends on GENERIC_ALLOCATOR
73 depends on PAGE_POOL
74
75 menu "Networking options"
76
77 source "net/packet/Kconfig"
78 source "net/unix/Kconfig"
79 source "net/tls/Kconfig"
80 source "net/xfrm/Kconfig"
81 source "net/iucv/Kconfig"
82 source "net/smc/Kconfig"
83 source "net/xdp/Kconfig"
84
85 config NET_HANDSHAKE
86 bool
87 depends on SUNRPC || NVME_TARGET_TCP |
88 default y
89
90 config NET_HANDSHAKE_KUNIT_TEST
91 tristate "KUnit tests for the handshak
92 default KUNIT_ALL_TESTS
93 depends on KUNIT
94 help
95 This builds the KUnit tests for the
96
97 KUnit tests run during boot and outp
98 log in TAP format (https://testanyth
99 kernel devs running KUnit test harne
100 into a production build.
101
102 For more information on KUnit and un
103 to the KUnit documentation in Docume
104
105 config INET
106 bool "TCP/IP networking"
107 help
108 These are the protocols used on the
109 Ethernets. It is highly recommended
110 your kernel by about 400 KB), since
111 system) use TCP/IP even if your mach
112 other computer. You will get the so-
113 allows you to ping yourself (great f
114
115 For an excellent introduction to Lin
116 Linux Networking HOWTO, available fr
117 <http://www.tldp.org/docs.html#howto
118
119 If you say Y here and also to "/proc
120 "Sysctl support" below, you can chan
121 behavior of the TCP/IP code by writi
122 /proc/sys/net/ipv4/*; the options ar
123 <file:Documentation/networking/ip-sy
124
125 Short answer: say Y.
126
127 if INET
128 source "net/ipv4/Kconfig"
129 source "net/ipv6/Kconfig"
130 source "net/netlabel/Kconfig"
131 source "net/mptcp/Kconfig"
132
133 endif # if INET
134
135 config NETWORK_SECMARK
136 bool "Security Marking"
137 help
138 This enables security marking of net
139 to nfmark, but designated for securi
140 If you are unsure how to answer this
141
142 config NET_PTP_CLASSIFY
143 def_bool n
144
145 config NETWORK_PHY_TIMESTAMPING
146 bool "Timestamping in PHY devices"
147 select NET_PTP_CLASSIFY
148 help
149 This allows timestamping of network
150 other MII bus snooping devices) with
151 capabilities. This option adds some
152 and receive paths.
153
154 If you are unsure how to answer this
155
156 menuconfig NETFILTER
157 bool "Network packet filtering framewo
158 help
159 Netfilter is a framework for filteri
160 that pass through your Linux box.
161
162 The most common use of packet filter
163 a firewall protecting a local networ
164 firewall provided by this kernel sup
165 filter", which means that it can rej
166 based on type, source, destination e
167 a "proxy-based" one, is more secure
168 bothersome to set up; it inspects th
169 closely, modifies it and has knowled
170 protocols, which a packet filter lac
171 firewalls often require changes to t
172 clients. Proxy-based firewalls don't
173 they are often combined with a packe
174 you say Y here.
175
176 You should also say Y here if you in
177 the gateway to the Internet for a lo
178 globally valid IP addresses. This is
179 of the computers on your local netwo
180 the outside, your box can "masquerad
181 forwards the traffic to the intended
182 modifies the packets to make it look
183 firewall box itself. It works both w
184 replies, the Linux box will silently
185 correct local computer. This way, th
186 are completely invisible to the outs
187 reach the outside and can receive re
188 run globally visible servers from wi
189 using a mechanism called portforward
190 called NAT (Network Address Translat
191
192 Another use of Netfilter is in trans
193 the local network tries to connect t
194 box can transparently forward the tr
195 typically a caching proxy server.
196
197 Yet another use of Netfilter is buil
198 a bridge with Network packet filteri
199 the bridged traffic. For filtering o
200 protocols over the bridge, use ebtab
201 configuration).
202
203 Various modules exist for netfilter
204 masquerading (ipmasqadm), packet fil
205 proxying, and portforwarding mechani
206 <file:Documentation/Changes> under "
207 these packages.
208
209 if NETFILTER
210
211 config NETFILTER_ADVANCED
212 bool "Advanced netfilter configuration
213 depends on NETFILTER
214 default y
215 help
216 If you say Y here you can select bet
217 If you say N the more unusual ones w
218 basic ones needed by most people wil
219
220 If unsure, say Y.
221
222 config BRIDGE_NETFILTER
223 tristate "Bridged IP/ARP packets filte
224 depends on BRIDGE
225 depends on NETFILTER && INET
226 depends on NETFILTER_ADVANCED
227 select NETFILTER_FAMILY_BRIDGE
228 select SKB_EXTENSIONS
229 help
230 Enabling this option will let arptab
231 ARP resp. IP traffic. If you want a
232 want this option enabled.
233 Enabling or disabling this option do
234 ebtables.
235
236 If unsure, say N.
237
238 source "net/netfilter/Kconfig"
239 source "net/ipv4/netfilter/Kconfig"
240 source "net/ipv6/netfilter/Kconfig"
241 source "net/bridge/netfilter/Kconfig"
242
243 endif
244
245 source "net/dccp/Kconfig"
246 source "net/sctp/Kconfig"
247 source "net/rds/Kconfig"
248 source "net/tipc/Kconfig"
249 source "net/atm/Kconfig"
250 source "net/l2tp/Kconfig"
251 source "net/802/Kconfig"
252 source "net/bridge/Kconfig"
253 source "net/dsa/Kconfig"
254 source "net/8021q/Kconfig"
255 source "net/llc/Kconfig"
256 source "net/appletalk/Kconfig"
257 source "net/x25/Kconfig"
258 source "net/lapb/Kconfig"
259 source "net/phonet/Kconfig"
260 source "net/6lowpan/Kconfig"
261 source "net/ieee802154/Kconfig"
262 source "net/mac802154/Kconfig"
263 source "net/sched/Kconfig"
264 source "net/dcb/Kconfig"
265 source "net/dns_resolver/Kconfig"
266 source "net/batman-adv/Kconfig"
267 source "net/openvswitch/Kconfig"
268 source "net/vmw_vsock/Kconfig"
269 source "net/netlink/Kconfig"
270 source "net/mpls/Kconfig"
271 source "net/nsh/Kconfig"
272 source "net/hsr/Kconfig"
273 source "net/switchdev/Kconfig"
274 source "net/l3mdev/Kconfig"
275 source "net/qrtr/Kconfig"
276 source "net/ncsi/Kconfig"
277
278 config PCPU_DEV_REFCNT
279 bool "Use percpu variables to maintain
280 depends on SMP
281 default y
282 help
283 network device refcount are using pe
284 This can be forced to N to detect un
285
286 config MAX_SKB_FRAGS
287 int "Maximum number of fragments per s
288 range 17 45
289 default 17
290 help
291 Having more fragments per skb_shared
292 This helps BIG TCP workloads, but mi
293 legacy drivers.
294 This also increases memory overhead
295 and in drivers using build_skb().
296 If unsure, say 17.
297
298 config RPS
299 bool "Receive packet steering"
300 depends on SMP && SYSFS
301 default y
302 help
303 Software receive side packet steerin
304 load of received packet processing a
305
306 config RFS_ACCEL
307 bool "Hardware acceleration of RFS"
308 depends on RPS
309 select CPU_RMAP
310 default y
311 help
312 Allowing drivers for multiqueue hard
313 accelerate RFS.
314
315 config SOCK_RX_QUEUE_MAPPING
316 bool
317
318 config XPS
319 bool
320 depends on SMP
321 select SOCK_RX_QUEUE_MAPPING
322 default y
323
324 config HWBM
325 bool
326
327 config CGROUP_NET_PRIO
328 bool "Network priority cgroup"
329 depends on CGROUPS
330 select SOCK_CGROUP_DATA
331 help
332 Cgroup subsystem for use in assignin
333 a per-interface basis.
334
335 config CGROUP_NET_CLASSID
336 bool "Network classid cgroup"
337 depends on CGROUPS
338 select SOCK_CGROUP_DATA
339 help
340 Cgroup subsystem for use as general
341 being used in cls_cgroup and for net
342
343 config NET_RX_BUSY_POLL
344 bool
345 default y if !PREEMPT_RT || (PREEMPT_R
346
347 config BQL
348 bool
349 prompt "Enable Byte Queue Limits"
350 depends on SYSFS
351 select DQL
352 default y
353
354 config BPF_STREAM_PARSER
355 bool "enable BPF STREAM_PARSER"
356 depends on INET
357 depends on BPF_SYSCALL
358 depends on CGROUP_BPF
359 select STREAM_PARSER
360 select NET_SOCK_MSG
361 help
362 Enabling this allows a TCP stream pa
363 BPF_MAP_TYPE_SOCKMAP.
364
365 config NET_FLOW_LIMIT
366 bool "Net flow limit"
367 depends on RPS
368 default y
369 help
370 The network stack has to drop packet
371 backlog reaches netdev_max_backlog.
372 generate the vast majority of load,
373 maintain capacity for the other flow
374 with many clients some protection ag
375 flow that greatly exceeds average wo
376
377 menu "Network testing"
378
379 config NET_PKTGEN
380 tristate "Packet Generator (USE WITH C
381 depends on INET && PROC_FS
382 help
383 This module will inject preconfigure
384 rate, out of a given interface. It
385 stress testing and performance analy
386 what was just said, you don't need i
387
388 Documentation on how to use the pack
389 at <file:Documentation/networking/pk
390
391 To compile this code as a module, ch
392 module will be called pktgen.
393
394 config NET_DROP_MONITOR
395 tristate "Network packet drop alerting
396 depends on INET && TRACEPOINTS
397 help
398 This feature provides an alerting se
399 event that packets are discarded in
400 are broadcast via netlink socket to
401 process. If you don't need network
402 just checking the various proc files
403 drop statistics, say N here.
404
405 endmenu
406
407 endmenu
408
409 source "net/ax25/Kconfig"
410 source "net/can/Kconfig"
411 source "net/bluetooth/Kconfig"
412 source "net/rxrpc/Kconfig"
413 source "net/kcm/Kconfig"
414 source "net/strparser/Kconfig"
415 source "net/mctp/Kconfig"
416
417 config FIB_RULES
418 bool
419
420 menuconfig WIRELESS
421 bool "Wireless"
422 depends on !S390
423 default y
424
425 if WIRELESS
426
427 source "net/wireless/Kconfig"
428 source "net/mac80211/Kconfig"
429
430 endif # WIRELESS
431
432 source "net/rfkill/Kconfig"
433 source "net/9p/Kconfig"
434 source "net/caif/Kconfig"
435 source "net/ceph/Kconfig"
436 source "net/nfc/Kconfig"
437 source "net/psample/Kconfig"
438 source "net/ife/Kconfig"
439
440 config LWTUNNEL
441 bool "Network light weight tunnels"
442 help
443 This feature provides an infrastruct
444 tunnels like mpls. There is no netde
445 weight tunnel endpoint. Tunnel encap
446 with light weight tunnel state assoc
447
448 config LWTUNNEL_BPF
449 bool "Execute BPF program as route nex
450 depends on LWTUNNEL && INET
451 default y if LWTUNNEL=y
452 help
453 Allows to run BPF programs as a next
454 lookup for incoming and outgoing pac
455
456 config DST_CACHE
457 bool
458 default n
459
460 config GRO_CELLS
461 bool
462 default n
463
464 config SOCK_VALIDATE_XMIT
465 bool
466
467 config NET_IEEE8021Q_HELPERS
468 bool
469
470 config NET_SELFTESTS
471 def_tristate PHYLIB
472 depends on PHYLIB && INET
473
474 config NET_SOCK_MSG
475 bool
476 default n
477 help
478 The NET_SOCK_MSG provides a framewor
479 ULPs (upper layer modules, e.g. TLS)
480 with the help of BPF programs.
481
482 config NET_DEVLINK
483 bool
484 default n
485
486 config PAGE_POOL
487 bool
488
489 config PAGE_POOL_STATS
490 default n
491 bool "Page pool stats"
492 depends on PAGE_POOL
493 help
494 Enable page pool statistics to track
495 in page pools. This option incurs ad
496 and recycle paths and additional mem
497 These statistics are only available
498 the driver using the page pool suppo
499
500 If unsure, say N.
501
502 config FAILOVER
503 tristate "Generic failover module"
504 help
505 The failover module provides a gener
506 drivers to register a netdev and a s
507 instance. The ops are used as event
508 handle netdev register/unregister/li
509 on slave pci ethernet devices with t
510 failover netdev. This enables paravi
511 VF as an accelerated low latency dat
512 migration of VMs with direct attache
513 paravirtual datapath when the VF is
514
515 config ETHTOOL_NETLINK
516 bool "Netlink interface for ethtool"
517 select DIMLIB
518 default y
519 help
520 An alternative userspace interface f
521 netlink. It provides better extensib
522 e.g. notification messages.
523
524 config NETDEV_ADDR_LIST_TEST
525 tristate "Unit tests for device addres
526 default KUNIT_ALL_TESTS
527 depends on KUNIT
528
529 config NET_TEST
530 tristate "KUnit tests for networking"
531 depends on KUNIT
532 default KUNIT_ALL_TESTS
533 help
534 KUnit tests covering core networking
535
536 If unsure, say N.
537
538 endif # if NET
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