Loading...
1# SPDX-License-Identifier: GPL-2.0-only
2#
3# Network configuration
4#
5
6menuconfig 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 doing, you should say Y here.
13 The reason is that some programs need kernel networking support even
14 when running on a stand-alone machine that isn't connected to any
15 other computer.
16
17 If you are upgrading from an older kernel, you
18 should consider updating your networking tools too because changes
19 in the kernel and the tools often go hand in hand. The tools are
20 contained in the package net-tools, the location and version number
21 of which are given in <file:Documentation/Changes>.
22
23 For a general introduction to Linux networking, it is highly
24 recommended to read the NET-HOWTO, available from
25 <http://www.tldp.org/docs.html#howto>.
26
27if NET
28
29config WANT_COMPAT_NETLINK_MESSAGES
30 bool
31 help
32 This option can be selected by other options that need compat
33 netlink messages.
34
35config COMPAT_NETLINK_MESSAGES
36 def_bool y
37 depends on COMPAT
38 depends on WEXT_CORE || WANT_COMPAT_NETLINK_MESSAGES
39 help
40 This option makes it possible to send different netlink messages
41 to tasks depending on whether the task is a compat task or not. To
42 achieve this, you need to set skb_shinfo(skb)->frag_list to the
43 compat skb before sending the skb, the netlink code will sort out
44 which message to actually pass to the task.
45
46 Newly written code should NEVER need this option but do
47 compat-independent messages instead!
48
49config NET_INGRESS
50 bool
51
52config NET_EGRESS
53 bool
54
55config NET_XGRESS
56 select NET_INGRESS
57 select NET_EGRESS
58 bool
59
60config NET_REDIRECT
61 bool
62
63config SKB_DECRYPTED
64 bool
65
66config SKB_EXTENSIONS
67 bool
68
69config NET_DEVMEM
70 def_bool y
71 depends on DMA_SHARED_BUFFER
72 depends on GENERIC_ALLOCATOR
73 depends on PAGE_POOL
74
75config NET_SHAPER
76 bool
77
78menu "Networking options"
79
80source "net/packet/Kconfig"
81source "net/unix/Kconfig"
82source "net/tls/Kconfig"
83source "net/xfrm/Kconfig"
84source "net/iucv/Kconfig"
85source "net/smc/Kconfig"
86source "net/xdp/Kconfig"
87
88config NET_HANDSHAKE
89 bool
90 depends on SUNRPC || NVME_TARGET_TCP || NVME_TCP
91 default y
92
93config NET_HANDSHAKE_KUNIT_TEST
94 tristate "KUnit tests for the handshake upcall mechanism" if !KUNIT_ALL_TESTS
95 default KUNIT_ALL_TESTS
96 depends on KUNIT
97 help
98 This builds the KUnit tests for the handshake upcall mechanism.
99
100 KUnit tests run during boot and output the results to the debug
101 log in TAP format (https://testanything.org/). Only useful for
102 kernel devs running KUnit test harness and are not for inclusion
103 into a production build.
104
105 For more information on KUnit and unit tests in general, refer
106 to the KUnit documentation in Documentation/dev-tools/kunit/.
107
108config INET
109 bool "TCP/IP networking"
110 help
111 These are the protocols used on the Internet and on most local
112 Ethernets. It is highly recommended to say Y here (this will enlarge
113 your kernel by about 400 KB), since some programs (e.g. the X window
114 system) use TCP/IP even if your machine is not connected to any
115 other computer. You will get the so-called loopback device which
116 allows you to ping yourself (great fun, that!).
117
118 For an excellent introduction to Linux networking, please read the
119 Linux Networking HOWTO, available from
120 <http://www.tldp.org/docs.html#howto>.
121
122 If you say Y here and also to "/proc file system support" and
123 "Sysctl support" below, you can change various aspects of the
124 behavior of the TCP/IP code by writing to the (virtual) files in
125 /proc/sys/net/ipv4/*; the options are explained in the file
126 <file:Documentation/networking/ip-sysctl.rst>.
127
128 Short answer: say Y.
129
130if INET
131source "net/ipv4/Kconfig"
132source "net/ipv6/Kconfig"
133source "net/netlabel/Kconfig"
134source "net/mptcp/Kconfig"
135
136endif # if INET
137
138config NETWORK_SECMARK
139 bool "Security Marking"
140 help
141 This enables security marking of network packets, similar
142 to nfmark, but designated for security purposes.
143 If you are unsure how to answer this question, answer N.
144
145config NET_PTP_CLASSIFY
146 def_bool n
147
148config NETWORK_PHY_TIMESTAMPING
149 bool "Timestamping in PHY devices"
150 select NET_PTP_CLASSIFY
151 help
152 This allows timestamping of network packets by PHYs (or
153 other MII bus snooping devices) with hardware timestamping
154 capabilities. This option adds some overhead in the transmit
155 and receive paths.
156
157 If you are unsure how to answer this question, answer N.
158
159menuconfig NETFILTER
160 bool "Network packet filtering framework (Netfilter)"
161 help
162 Netfilter is a framework for filtering and mangling network packets
163 that pass through your Linux box.
164
165 The most common use of packet filtering is to run your Linux box as
166 a firewall protecting a local network from the Internet. The type of
167 firewall provided by this kernel support is called a "packet
168 filter", which means that it can reject individual network packets
169 based on type, source, destination etc. The other kind of firewall,
170 a "proxy-based" one, is more secure but more intrusive and more
171 bothersome to set up; it inspects the network traffic much more
172 closely, modifies it and has knowledge about the higher level
173 protocols, which a packet filter lacks. Moreover, proxy-based
174 firewalls often require changes to the programs running on the local
175 clients. Proxy-based firewalls don't need support by the kernel, but
176 they are often combined with a packet filter, which only works if
177 you say Y here.
178
179 You should also say Y here if you intend to use your Linux box as
180 the gateway to the Internet for a local network of machines without
181 globally valid IP addresses. This is called "masquerading": if one
182 of the computers on your local network wants to send something to
183 the outside, your box can "masquerade" as that computer, i.e. it
184 forwards the traffic to the intended outside destination, but
185 modifies the packets to make it look like they came from the
186 firewall box itself. It works both ways: if the outside host
187 replies, the Linux box will silently forward the traffic to the
188 correct local computer. This way, the computers on your local net
189 are completely invisible to the outside world, even though they can
190 reach the outside and can receive replies. It is even possible to
191 run globally visible servers from within a masqueraded local network
192 using a mechanism called portforwarding. Masquerading is also often
193 called NAT (Network Address Translation).
194
195 Another use of Netfilter is in transparent proxying: if a machine on
196 the local network tries to connect to an outside host, your Linux
197 box can transparently forward the traffic to a local server,
198 typically a caching proxy server.
199
200 Yet another use of Netfilter is building a bridging firewall. Using
201 a bridge with Network packet filtering enabled makes iptables "see"
202 the bridged traffic. For filtering on the lower network and Ethernet
203 protocols over the bridge, use ebtables (under bridge netfilter
204 configuration).
205
206 Various modules exist for netfilter which replace the previous
207 masquerading (ipmasqadm), packet filtering (ipchains), transparent
208 proxying, and portforwarding mechanisms. Please see
209 <file:Documentation/Changes> under "iptables" for the location of
210 these packages.
211
212if NETFILTER
213
214config NETFILTER_ADVANCED
215 bool "Advanced netfilter configuration"
216 depends on NETFILTER
217 default y
218 help
219 If you say Y here you can select between all the netfilter modules.
220 If you say N the more unusual ones will not be shown and the
221 basic ones needed by most people will default to 'M'.
222
223 If unsure, say Y.
224
225config BRIDGE_NETFILTER
226 tristate "Bridged IP/ARP packets filtering"
227 depends on BRIDGE
228 depends on NETFILTER && INET
229 depends on NETFILTER_ADVANCED
230 select NETFILTER_FAMILY_BRIDGE
231 select SKB_EXTENSIONS
232 help
233 Enabling this option will let arptables resp. iptables see bridged
234 ARP resp. IP traffic. If you want a bridging firewall, you probably
235 want this option enabled.
236 Enabling or disabling this option doesn't enable or disable
237 ebtables.
238
239 If unsure, say N.
240
241source "net/netfilter/Kconfig"
242source "net/ipv4/netfilter/Kconfig"
243source "net/ipv6/netfilter/Kconfig"
244source "net/bridge/netfilter/Kconfig"
245
246endif
247
248source "net/dccp/Kconfig"
249source "net/sctp/Kconfig"
250source "net/rds/Kconfig"
251source "net/tipc/Kconfig"
252source "net/atm/Kconfig"
253source "net/l2tp/Kconfig"
254source "net/802/Kconfig"
255source "net/bridge/Kconfig"
256source "net/dsa/Kconfig"
257source "net/8021q/Kconfig"
258source "net/llc/Kconfig"
259source "net/appletalk/Kconfig"
260source "net/x25/Kconfig"
261source "net/lapb/Kconfig"
262source "net/phonet/Kconfig"
263source "net/6lowpan/Kconfig"
264source "net/ieee802154/Kconfig"
265source "net/mac802154/Kconfig"
266source "net/sched/Kconfig"
267source "net/dcb/Kconfig"
268source "net/dns_resolver/Kconfig"
269source "net/batman-adv/Kconfig"
270source "net/openvswitch/Kconfig"
271source "net/vmw_vsock/Kconfig"
272source "net/netlink/Kconfig"
273source "net/mpls/Kconfig"
274source "net/nsh/Kconfig"
275source "net/hsr/Kconfig"
276source "net/switchdev/Kconfig"
277source "net/l3mdev/Kconfig"
278source "net/qrtr/Kconfig"
279source "net/ncsi/Kconfig"
280
281config PCPU_DEV_REFCNT
282 bool "Use percpu variables to maintain network device refcount"
283 depends on SMP
284 default y
285 help
286 network device refcount are using per cpu variables if this option is set.
287 This can be forced to N to detect underflows (with a performance drop).
288
289config MAX_SKB_FRAGS
290 int "Maximum number of fragments per skb_shared_info"
291 range 17 45
292 default 17
293 help
294 Having more fragments per skb_shared_info can help GRO efficiency.
295 This helps BIG TCP workloads, but might expose bugs in some
296 legacy drivers.
297 This also increases memory overhead of small packets,
298 and in drivers using build_skb().
299 If unsure, say 17.
300
301config RPS
302 bool "Receive packet steering"
303 depends on SMP && SYSFS
304 default y
305 help
306 Software receive side packet steering (RPS) distributes the
307 load of received packet processing across multiple CPUs.
308
309config RFS_ACCEL
310 bool "Hardware acceleration of RFS"
311 depends on RPS
312 select CPU_RMAP
313 default y
314 help
315 Allowing drivers for multiqueue hardware with flow filter tables to
316 accelerate RFS.
317
318config SOCK_RX_QUEUE_MAPPING
319 bool
320
321config XPS
322 bool
323 depends on SMP
324 select SOCK_RX_QUEUE_MAPPING
325 default y
326
327config HWBM
328 bool
329
330config CGROUP_NET_PRIO
331 bool "Network priority cgroup"
332 depends on CGROUPS
333 select SOCK_CGROUP_DATA
334 help
335 Cgroup subsystem for use in assigning processes to network priorities on
336 a per-interface basis.
337
338config CGROUP_NET_CLASSID
339 bool "Network classid cgroup"
340 depends on CGROUPS
341 select SOCK_CGROUP_DATA
342 help
343 Cgroup subsystem for use as general purpose socket classid marker that is
344 being used in cls_cgroup and for netfilter matching.
345
346config NET_RX_BUSY_POLL
347 bool
348 default y if !PREEMPT_RT || (PREEMPT_RT && !NETCONSOLE)
349
350config BQL
351 bool
352 prompt "Enable Byte Queue Limits"
353 depends on SYSFS
354 select DQL
355 default y
356
357config BPF_STREAM_PARSER
358 bool "enable BPF STREAM_PARSER"
359 depends on INET
360 depends on BPF_SYSCALL
361 depends on CGROUP_BPF
362 select STREAM_PARSER
363 select NET_SOCK_MSG
364 help
365 Enabling this allows a TCP stream parser to be used with
366 BPF_MAP_TYPE_SOCKMAP.
367
368config NET_FLOW_LIMIT
369 bool "Net flow limit"
370 depends on RPS
371 default y
372 help
373 The network stack has to drop packets when a receive processing CPU's
374 backlog reaches netdev_max_backlog. If a few out of many active flows
375 generate the vast majority of load, drop their traffic earlier to
376 maintain capacity for the other flows. This feature provides servers
377 with many clients some protection against DoS by a single (spoofed)
378 flow that greatly exceeds average workload.
379
380menu "Network testing"
381
382config NET_PKTGEN
383 tristate "Packet Generator (USE WITH CAUTION)"
384 depends on INET && PROC_FS
385 help
386 This module will inject preconfigured packets, at a configurable
387 rate, out of a given interface. It is used for network interface
388 stress testing and performance analysis. If you don't understand
389 what was just said, you don't need it: say N.
390
391 Documentation on how to use the packet generator can be found
392 at <file:Documentation/networking/pktgen.rst>.
393
394 To compile this code as a module, choose M here: the
395 module will be called pktgen.
396
397config NET_DROP_MONITOR
398 tristate "Network packet drop alerting service"
399 depends on INET && TRACEPOINTS
400 help
401 This feature provides an alerting service to userspace in the
402 event that packets are discarded in the network stack. Alerts
403 are broadcast via netlink socket to any listening user space
404 process. If you don't need network drop alerts, or if you are ok
405 just checking the various proc files and other utilities for
406 drop statistics, say N here.
407
408endmenu
409
410endmenu
411
412source "net/ax25/Kconfig"
413source "net/can/Kconfig"
414source "net/bluetooth/Kconfig"
415source "net/rxrpc/Kconfig"
416source "net/kcm/Kconfig"
417source "net/strparser/Kconfig"
418source "net/mctp/Kconfig"
419
420config FIB_RULES
421 bool
422
423menuconfig WIRELESS
424 bool "Wireless"
425 depends on !S390
426 default y
427
428if WIRELESS
429
430source "net/wireless/Kconfig"
431source "net/mac80211/Kconfig"
432
433endif # WIRELESS
434
435source "net/rfkill/Kconfig"
436source "net/9p/Kconfig"
437source "net/caif/Kconfig"
438source "net/ceph/Kconfig"
439source "net/nfc/Kconfig"
440source "net/psample/Kconfig"
441source "net/ife/Kconfig"
442
443config LWTUNNEL
444 bool "Network light weight tunnels"
445 help
446 This feature provides an infrastructure to support light weight
447 tunnels like mpls. There is no netdevice associated with a light
448 weight tunnel endpoint. Tunnel encapsulation parameters are stored
449 with light weight tunnel state associated with fib routes.
450
451config LWTUNNEL_BPF
452 bool "Execute BPF program as route nexthop action"
453 depends on LWTUNNEL && INET
454 default y if LWTUNNEL=y
455 help
456 Allows to run BPF programs as a nexthop action following a route
457 lookup for incoming and outgoing packets.
458
459config DST_CACHE
460 bool
461 default n
462
463config GRO_CELLS
464 bool
465 default n
466
467config SOCK_VALIDATE_XMIT
468 bool
469
470config NET_IEEE8021Q_HELPERS
471 bool
472
473config NET_SELFTESTS
474 def_tristate PHYLIB
475 depends on PHYLIB && INET
476
477config NET_SOCK_MSG
478 bool
479 default n
480 help
481 The NET_SOCK_MSG provides a framework for plain sockets (e.g. TCP) or
482 ULPs (upper layer modules, e.g. TLS) to process L7 application data
483 with the help of BPF programs.
484
485config NET_DEVLINK
486 bool
487 default n
488
489config PAGE_POOL
490 bool
491
492config PAGE_POOL_STATS
493 default n
494 bool "Page pool stats"
495 depends on PAGE_POOL
496 help
497 Enable page pool statistics to track page allocation and recycling
498 in page pools. This option incurs additional CPU cost in allocation
499 and recycle paths and additional memory cost to store the statistics.
500 These statistics are only available if this option is enabled and if
501 the driver using the page pool supports exporting this data.
502
503 If unsure, say N.
504
505config FAILOVER
506 tristate "Generic failover module"
507 help
508 The failover module provides a generic interface for paravirtual
509 drivers to register a netdev and a set of ops with a failover
510 instance. The ops are used as event handlers that get called to
511 handle netdev register/unregister/link change/name change events
512 on slave pci ethernet devices with the same mac address as the
513 failover netdev. This enables paravirtual drivers to use a
514 VF as an accelerated low latency datapath. It also allows live
515 migration of VMs with direct attached VFs by failing over to the
516 paravirtual datapath when the VF is unplugged.
517
518config ETHTOOL_NETLINK
519 bool "Netlink interface for ethtool"
520 select DIMLIB
521 default y
522 help
523 An alternative userspace interface for ethtool based on generic
524 netlink. It provides better extensibility and some new features,
525 e.g. notification messages.
526
527config NETDEV_ADDR_LIST_TEST
528 tristate "Unit tests for device address list"
529 default KUNIT_ALL_TESTS
530 depends on KUNIT
531
532config NET_TEST
533 tristate "KUnit tests for networking" if !KUNIT_ALL_TESTS
534 depends on KUNIT
535 default KUNIT_ALL_TESTS
536 help
537 KUnit tests covering core networking infra, such as sk_buff.
538
539 If unsure, say N.
540
541endif # if NET
1#
2# Network configuration
3#
4
5menuconfig NET
6 bool "Networking support"
7 select NLATTR
8 select GENERIC_NET_UTILS
9 select BPF
10 ---help---
11 Unless you really know what you are doing, you should say Y here.
12 The reason is that some programs need kernel networking support even
13 when running on a stand-alone machine that isn't connected to any
14 other computer.
15
16 If you are upgrading from an older kernel, you
17 should consider updating your networking tools too because changes
18 in the kernel and the tools often go hand in hand. The tools are
19 contained in the package net-tools, the location and version number
20 of which are given in <file:Documentation/Changes>.
21
22 For a general introduction to Linux networking, it is highly
23 recommended to read the NET-HOWTO, available from
24 <http://www.tldp.org/docs.html#howto>.
25
26if NET
27
28config WANT_COMPAT_NETLINK_MESSAGES
29 bool
30 help
31 This option can be selected by other options that need compat
32 netlink messages.
33
34config COMPAT_NETLINK_MESSAGES
35 def_bool y
36 depends on COMPAT
37 depends on WEXT_CORE || WANT_COMPAT_NETLINK_MESSAGES
38 help
39 This option makes it possible to send different netlink messages
40 to tasks depending on whether the task is a compat task or not. To
41 achieve this, you need to set skb_shinfo(skb)->frag_list to the
42 compat skb before sending the skb, the netlink code will sort out
43 which message to actually pass to the task.
44
45 Newly written code should NEVER need this option but do
46 compat-independent messages instead!
47
48config NET_INGRESS
49 bool
50
51config NET_EGRESS
52 bool
53
54menu "Networking options"
55
56source "net/packet/Kconfig"
57source "net/unix/Kconfig"
58source "net/tls/Kconfig"
59source "net/xfrm/Kconfig"
60source "net/iucv/Kconfig"
61source "net/smc/Kconfig"
62
63config INET
64 bool "TCP/IP networking"
65 select CRYPTO
66 select CRYPTO_AES
67 ---help---
68 These are the protocols used on the Internet and on most local
69 Ethernets. It is highly recommended to say Y here (this will enlarge
70 your kernel by about 400 KB), since some programs (e.g. the X window
71 system) use TCP/IP even if your machine is not connected to any
72 other computer. You will get the so-called loopback device which
73 allows you to ping yourself (great fun, that!).
74
75 For an excellent introduction to Linux networking, please read the
76 Linux Networking HOWTO, available from
77 <http://www.tldp.org/docs.html#howto>.
78
79 If you say Y here and also to "/proc file system support" and
80 "Sysctl support" below, you can change various aspects of the
81 behavior of the TCP/IP code by writing to the (virtual) files in
82 /proc/sys/net/ipv4/*; the options are explained in the file
83 <file:Documentation/networking/ip-sysctl.txt>.
84
85 Short answer: say Y.
86
87if INET
88source "net/ipv4/Kconfig"
89source "net/ipv6/Kconfig"
90source "net/netlabel/Kconfig"
91
92endif # if INET
93
94config NETWORK_SECMARK
95 bool "Security Marking"
96 help
97 This enables security marking of network packets, similar
98 to nfmark, but designated for security purposes.
99 If you are unsure how to answer this question, answer N.
100
101config NET_PTP_CLASSIFY
102 def_bool n
103
104config NETWORK_PHY_TIMESTAMPING
105 bool "Timestamping in PHY devices"
106 select NET_PTP_CLASSIFY
107 help
108 This allows timestamping of network packets by PHYs with
109 hardware timestamping capabilities. This option adds some
110 overhead in the transmit and receive paths.
111
112 If you are unsure how to answer this question, answer N.
113
114menuconfig NETFILTER
115 bool "Network packet filtering framework (Netfilter)"
116 ---help---
117 Netfilter is a framework for filtering and mangling network packets
118 that pass through your Linux box.
119
120 The most common use of packet filtering is to run your Linux box as
121 a firewall protecting a local network from the Internet. The type of
122 firewall provided by this kernel support is called a "packet
123 filter", which means that it can reject individual network packets
124 based on type, source, destination etc. The other kind of firewall,
125 a "proxy-based" one, is more secure but more intrusive and more
126 bothersome to set up; it inspects the network traffic much more
127 closely, modifies it and has knowledge about the higher level
128 protocols, which a packet filter lacks. Moreover, proxy-based
129 firewalls often require changes to the programs running on the local
130 clients. Proxy-based firewalls don't need support by the kernel, but
131 they are often combined with a packet filter, which only works if
132 you say Y here.
133
134 You should also say Y here if you intend to use your Linux box as
135 the gateway to the Internet for a local network of machines without
136 globally valid IP addresses. This is called "masquerading": if one
137 of the computers on your local network wants to send something to
138 the outside, your box can "masquerade" as that computer, i.e. it
139 forwards the traffic to the intended outside destination, but
140 modifies the packets to make it look like they came from the
141 firewall box itself. It works both ways: if the outside host
142 replies, the Linux box will silently forward the traffic to the
143 correct local computer. This way, the computers on your local net
144 are completely invisible to the outside world, even though they can
145 reach the outside and can receive replies. It is even possible to
146 run globally visible servers from within a masqueraded local network
147 using a mechanism called portforwarding. Masquerading is also often
148 called NAT (Network Address Translation).
149
150 Another use of Netfilter is in transparent proxying: if a machine on
151 the local network tries to connect to an outside host, your Linux
152 box can transparently forward the traffic to a local server,
153 typically a caching proxy server.
154
155 Yet another use of Netfilter is building a bridging firewall. Using
156 a bridge with Network packet filtering enabled makes iptables "see"
157 the bridged traffic. For filtering on the lower network and Ethernet
158 protocols over the bridge, use ebtables (under bridge netfilter
159 configuration).
160
161 Various modules exist for netfilter which replace the previous
162 masquerading (ipmasqadm), packet filtering (ipchains), transparent
163 proxying, and portforwarding mechanisms. Please see
164 <file:Documentation/Changes> under "iptables" for the location of
165 these packages.
166
167if NETFILTER
168
169config NETFILTER_ADVANCED
170 bool "Advanced netfilter configuration"
171 depends on NETFILTER
172 default y
173 help
174 If you say Y here you can select between all the netfilter modules.
175 If you say N the more unusual ones will not be shown and the
176 basic ones needed by most people will default to 'M'.
177
178 If unsure, say Y.
179
180config BRIDGE_NETFILTER
181 tristate "Bridged IP/ARP packets filtering"
182 depends on BRIDGE
183 depends on NETFILTER && INET
184 depends on NETFILTER_ADVANCED
185 select NETFILTER_FAMILY_BRIDGE
186 default m
187 ---help---
188 Enabling this option will let arptables resp. iptables see bridged
189 ARP resp. IP traffic. If you want a bridging firewall, you probably
190 want this option enabled.
191 Enabling or disabling this option doesn't enable or disable
192 ebtables.
193
194 If unsure, say N.
195
196source "net/netfilter/Kconfig"
197source "net/ipv4/netfilter/Kconfig"
198source "net/ipv6/netfilter/Kconfig"
199source "net/decnet/netfilter/Kconfig"
200source "net/bridge/netfilter/Kconfig"
201
202endif
203
204source "net/dccp/Kconfig"
205source "net/sctp/Kconfig"
206source "net/rds/Kconfig"
207source "net/tipc/Kconfig"
208source "net/atm/Kconfig"
209source "net/l2tp/Kconfig"
210source "net/802/Kconfig"
211source "net/bridge/Kconfig"
212source "net/dsa/Kconfig"
213source "net/8021q/Kconfig"
214source "net/decnet/Kconfig"
215source "net/llc/Kconfig"
216source "drivers/net/appletalk/Kconfig"
217source "net/x25/Kconfig"
218source "net/lapb/Kconfig"
219source "net/phonet/Kconfig"
220source "net/6lowpan/Kconfig"
221source "net/ieee802154/Kconfig"
222source "net/mac802154/Kconfig"
223source "net/sched/Kconfig"
224source "net/dcb/Kconfig"
225source "net/dns_resolver/Kconfig"
226source "net/batman-adv/Kconfig"
227source "net/openvswitch/Kconfig"
228source "net/vmw_vsock/Kconfig"
229source "net/netlink/Kconfig"
230source "net/mpls/Kconfig"
231source "net/nsh/Kconfig"
232source "net/hsr/Kconfig"
233source "net/switchdev/Kconfig"
234source "net/l3mdev/Kconfig"
235source "net/qrtr/Kconfig"
236source "net/ncsi/Kconfig"
237
238config RPS
239 bool
240 depends on SMP && SYSFS
241 default y
242
243config RFS_ACCEL
244 bool
245 depends on RPS
246 select CPU_RMAP
247 default y
248
249config XPS
250 bool
251 depends on SMP
252 default y
253
254config HWBM
255 bool
256
257config CGROUP_NET_PRIO
258 bool "Network priority cgroup"
259 depends on CGROUPS
260 select SOCK_CGROUP_DATA
261 ---help---
262 Cgroup subsystem for use in assigning processes to network priorities on
263 a per-interface basis.
264
265config CGROUP_NET_CLASSID
266 bool "Network classid cgroup"
267 depends on CGROUPS
268 select SOCK_CGROUP_DATA
269 ---help---
270 Cgroup subsystem for use as general purpose socket classid marker that is
271 being used in cls_cgroup and for netfilter matching.
272
273config NET_RX_BUSY_POLL
274 bool
275 default y
276
277config BQL
278 bool
279 depends on SYSFS
280 select DQL
281 default y
282
283config BPF_JIT
284 bool "enable BPF Just In Time compiler"
285 depends on HAVE_CBPF_JIT || HAVE_EBPF_JIT
286 depends on MODULES
287 ---help---
288 Berkeley Packet Filter filtering capabilities are normally handled
289 by an interpreter. This option allows kernel to generate a native
290 code when filter is loaded in memory. This should speedup
291 packet sniffing (libpcap/tcpdump).
292
293 Note, admin should enable this feature changing:
294 /proc/sys/net/core/bpf_jit_enable
295 /proc/sys/net/core/bpf_jit_harden (optional)
296 /proc/sys/net/core/bpf_jit_kallsyms (optional)
297
298config BPF_STREAM_PARSER
299 bool "enable BPF STREAM_PARSER"
300 depends on BPF_SYSCALL
301 select STREAM_PARSER
302 ---help---
303 Enabling this allows a stream parser to be used with
304 BPF_MAP_TYPE_SOCKMAP.
305
306 BPF_MAP_TYPE_SOCKMAP provides a map type to use with network sockets.
307 It can be used to enforce socket policy, implement socket redirects,
308 etc.
309
310config NET_FLOW_LIMIT
311 bool
312 depends on RPS
313 default y
314 ---help---
315 The network stack has to drop packets when a receive processing CPU's
316 backlog reaches netdev_max_backlog. If a few out of many active flows
317 generate the vast majority of load, drop their traffic earlier to
318 maintain capacity for the other flows. This feature provides servers
319 with many clients some protection against DoS by a single (spoofed)
320 flow that greatly exceeds average workload.
321
322menu "Network testing"
323
324config NET_PKTGEN
325 tristate "Packet Generator (USE WITH CAUTION)"
326 depends on INET && PROC_FS
327 ---help---
328 This module will inject preconfigured packets, at a configurable
329 rate, out of a given interface. It is used for network interface
330 stress testing and performance analysis. If you don't understand
331 what was just said, you don't need it: say N.
332
333 Documentation on how to use the packet generator can be found
334 at <file:Documentation/networking/pktgen.txt>.
335
336 To compile this code as a module, choose M here: the
337 module will be called pktgen.
338
339config NET_DROP_MONITOR
340 tristate "Network packet drop alerting service"
341 depends on INET && TRACEPOINTS
342 ---help---
343 This feature provides an alerting service to userspace in the
344 event that packets are discarded in the network stack. Alerts
345 are broadcast via netlink socket to any listening user space
346 process. If you don't need network drop alerts, or if you are ok
347 just checking the various proc files and other utilities for
348 drop statistics, say N here.
349
350endmenu
351
352endmenu
353
354source "net/ax25/Kconfig"
355source "net/can/Kconfig"
356source "net/bluetooth/Kconfig"
357source "net/rxrpc/Kconfig"
358source "net/kcm/Kconfig"
359source "net/strparser/Kconfig"
360
361config FIB_RULES
362 bool
363
364menuconfig WIRELESS
365 bool "Wireless"
366 depends on !S390
367 default y
368
369if WIRELESS
370
371source "net/wireless/Kconfig"
372source "net/mac80211/Kconfig"
373
374endif # WIRELESS
375
376source "net/wimax/Kconfig"
377
378source "net/rfkill/Kconfig"
379source "net/9p/Kconfig"
380source "net/caif/Kconfig"
381source "net/ceph/Kconfig"
382source "net/nfc/Kconfig"
383source "net/psample/Kconfig"
384source "net/ife/Kconfig"
385
386config LWTUNNEL
387 bool "Network light weight tunnels"
388 ---help---
389 This feature provides an infrastructure to support light weight
390 tunnels like mpls. There is no netdevice associated with a light
391 weight tunnel endpoint. Tunnel encapsulation parameters are stored
392 with light weight tunnel state associated with fib routes.
393
394config LWTUNNEL_BPF
395 bool "Execute BPF program as route nexthop action"
396 depends on LWTUNNEL
397 default y if LWTUNNEL=y
398 ---help---
399 Allows to run BPF programs as a nexthop action following a route
400 lookup for incoming and outgoing packets.
401
402config DST_CACHE
403 bool
404 default n
405
406config GRO_CELLS
407 bool
408 default n
409
410config NET_DEVLINK
411 tristate "Network physical/parent device Netlink interface"
412 help
413 Network physical/parent device Netlink interface provides
414 infrastructure to support access to physical chip-wide config and
415 monitoring.
416
417config MAY_USE_DEVLINK
418 tristate
419 default m if NET_DEVLINK=m
420 default y if NET_DEVLINK=y || NET_DEVLINK=n
421 help
422 Drivers using the devlink infrastructure should have a dependency
423 on MAY_USE_DEVLINK to ensure they do not cause link errors when
424 devlink is a loadable module and the driver using it is built-in.
425
426endif # if NET
427
428# Used by archs to tell that they support BPF JIT compiler plus which flavour.
429# Only one of the two can be selected for a specific arch since eBPF JIT supersedes
430# the cBPF JIT.
431
432# Classic BPF JIT (cBPF)
433config HAVE_CBPF_JIT
434 bool
435
436# Extended BPF JIT (eBPF)
437config HAVE_EBPF_JIT
438 bool