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2024-10-22 8ac6c7a54ed1b98d142dce24b11c6de6a1e239a5 
 kernel/net/Kconfig
....@@ -1,3 +1,4 @@
1
+# SPDX-License-Identifier: GPL-2.0-only
12 #
23 # Network configuration
34 #
....@@ -7,7 +8,7 @@
78 	select NLATTR
89 	select GENERIC_NET_UTILS
910 	select BPF
10
-	---help---
11
+	help
1112 	  Unless you really know what you are doing, you should say Y here.
1213 	  The reason is that some programs need kernel networking support even
1314 	  when running on a stand-alone machine that isn't connected to any
....@@ -51,6 +52,12 @@
5152 config NET_EGRESS
5253 	bool
5354 
55
+config NET_REDIRECT
56
+	bool
57
+
58
+config SKB_EXTENSIONS
59
+	bool
60
+
5461 menu "Networking options"
5562 
5663 source "net/packet/Kconfig"
....@@ -63,9 +70,7 @@
6370 
6471 config INET
6572 	bool "TCP/IP networking"
66
-	select CRYPTO
67
-	select CRYPTO_AES
68
-	---help---
73
+	help
6974 	  These are the protocols used on the Internet and on most local
7075 	  Ethernets. It is highly recommended to say Y here (this will enlarge
7176 	  your kernel by about 400 KB), since some programs (e.g. the X window
....@@ -81,7 +86,7 @@
8186 	  "Sysctl support" below, you can change various aspects of the
8287 	  behavior of the TCP/IP code by writing to the (virtual) files in
8388 	  /proc/sys/net/ipv4/*; the options are explained in the file
84
-	  <file:Documentation/networking/ip-sysctl.txt>.
89
+	  <file:Documentation/networking/ip-sysctl.rst>.
8590 
8691 	  Short answer: say Y.
8792 
....@@ -89,6 +94,7 @@
8994 source "net/ipv4/Kconfig"
9095 source "net/ipv6/Kconfig"
9196 source "net/netlabel/Kconfig"
97
+source "net/mptcp/Kconfig"
9298 
9399 endif # if INET
94100 
....@@ -106,15 +112,16 @@
106112 	bool "Timestamping in PHY devices"
107113 	select NET_PTP_CLASSIFY
108114 	help
109
-	  This allows timestamping of network packets by PHYs with
110
-	  hardware timestamping capabilities. This option adds some
111
-	  overhead in the transmit and receive paths.
115
+	  This allows timestamping of network packets by PHYs (or
116
+	  other MII bus snooping devices) with hardware timestamping
117
+	  capabilities. This option adds some overhead in the transmit
118
+	  and receive paths.
112119 
113120 	  If you are unsure how to answer this question, answer N.
114121 
115122 menuconfig NETFILTER
116123 	bool "Network packet filtering framework (Netfilter)"
117
-	---help---
124
+	help
118125 	  Netfilter is a framework for filtering and mangling network packets
119126 	  that pass through your Linux box.
120127 
....@@ -184,7 +191,8 @@
184191 	depends on NETFILTER && INET
185192 	depends on NETFILTER_ADVANCED
186193 	select NETFILTER_FAMILY_BRIDGE
187
-	---help---
194
+	select SKB_EXTENSIONS
195
+	help
188196 	  Enabling this option will let arptables resp. iptables see bridged
189197 	  ARP resp. IP traffic. If you want a bridging firewall, you probably
190198 	  want this option enabled.
....@@ -196,7 +204,6 @@
196204 source "net/netfilter/Kconfig"
197205 source "net/ipv4/netfilter/Kconfig"
198206 source "net/ipv6/netfilter/Kconfig"
199
-source "net/decnet/netfilter/Kconfig"
200207 source "net/bridge/netfilter/Kconfig"
201208 
202209 endif
....@@ -213,7 +220,6 @@
213220 source "net/bridge/Kconfig"
214221 source "net/dsa/Kconfig"
215222 source "net/8021q/Kconfig"
216
-source "net/decnet/Kconfig"
217223 source "net/llc/Kconfig"
218224 source "drivers/net/appletalk/Kconfig"
219225 source "net/x25/Kconfig"
....@@ -254,13 +260,13 @@
254260 	default y
255261 
256262 config HWBM
257
-       bool
263
+	bool
258264 
259265 config CGROUP_NET_PRIO
260266 	bool "Network priority cgroup"
261267 	depends on CGROUPS
262268 	select SOCK_CGROUP_DATA
263
-	---help---
269
+	help
264270 	  Cgroup subsystem for use in assigning processes to network priorities on
265271 	  a per-interface basis.
266272 
....@@ -268,7 +274,7 @@
268274 	bool "Network classid cgroup"
269275 	depends on CGROUPS
270276 	select SOCK_CGROUP_DATA
271
-	---help---
277
+	help
272278 	  Cgroup subsystem for use as general purpose socket classid marker that is
273279 	  being used in cls_cgroup and for netfilter matching.
274280 
....@@ -286,7 +292,7 @@
286292 	bool "enable BPF Just In Time compiler"
287293 	depends on HAVE_CBPF_JIT || HAVE_EBPF_JIT
288294 	depends on MODULES
289
-	---help---
295
+	help
290296 	  Berkeley Packet Filter filtering capabilities are normally handled
291297 	  by an interpreter. This option allows kernel to generate a native
292298 	  code when filter is loaded in memory. This should speedup
....@@ -299,35 +305,24 @@
299305 
300306 config BPF_STREAM_PARSER
301307 	bool "enable BPF STREAM_PARSER"
308
+	depends on INET
302309 	depends on BPF_SYSCALL
310
+	depends on CGROUP_BPF
303311 	select STREAM_PARSER
304
-	---help---
305
-	 Enabling this allows a stream parser to be used with
306
-	 BPF_MAP_TYPE_SOCKMAP.
307
-
308
-	 BPF_MAP_TYPE_SOCKMAP provides a map type to use with network sockets.
309
-	 It can be used to enforce socket policy, implement socket redirects,
310
-	 etc.
311
-
312
-config ETHTOOL
313
-	bool "enable ethtool"
314
-	default y
312
+	select NET_SOCK_MSG
315313 	help
316
-	  This selects ethtool function, default is Y. If say N, ethtool function
317
-	  is not implemented.
314
+	  Enabling this allows a stream parser to be used with
315
+	  BPF_MAP_TYPE_SOCKMAP.
318316 
319
-config FILTER
320
-	bool "enable filter"
321
-	default y
322
-	help
323
-	  This selects filter function, default is Y. If say N, filter function
324
-	  is not implemented.
317
+	  BPF_MAP_TYPE_SOCKMAP provides a map type to use with network sockets.
318
+	  It can be used to enforce socket policy, implement socket redirects,
319
+	  etc.
325320 
326321 config NET_FLOW_LIMIT
327322 	bool
328323 	depends on RPS
329324 	default y
330
-	---help---
325
+	help
331326 	  The network stack has to drop packets when a receive processing CPU's
332327 	  backlog reaches netdev_max_backlog. If a few out of many active flows
333328 	  generate the vast majority of load, drop their traffic earlier to
....@@ -340,14 +335,14 @@
340335 config NET_PKTGEN
341336 	tristate "Packet Generator (USE WITH CAUTION)"
342337 	depends on INET && PROC_FS
343
-	---help---
338
+	help
344339 	  This module will inject preconfigured packets, at a configurable
345340 	  rate, out of a given interface.  It is used for network interface
346341 	  stress testing and performance analysis.  If you don't understand
347342 	  what was just said, you don't need it: say N.
348343 
349344 	  Documentation on how to use the packet generator can be found
350
-	  at <file:Documentation/networking/pktgen.txt>.
345
+	  at <file:Documentation/networking/pktgen.rst>.
351346 
352347 	  To compile this code as a module, choose M here: the
353348 	  module will be called pktgen.
....@@ -355,13 +350,13 @@
355350 config NET_DROP_MONITOR
356351 	tristate "Network packet drop alerting service"
357352 	depends on INET && TRACEPOINTS
358
-	---help---
359
-	This feature provides an alerting service to userspace in the
360
-	event that packets are discarded in the network stack.  Alerts
361
-	are broadcast via netlink socket to any listening user space
362
-	process.  If you don't need network drop alerts, or if you are ok
363
-	just checking the various proc files and other utilities for
364
-	drop statistics, say N here.
353
+	help
354
+	  This feature provides an alerting service to userspace in the
355
+	  event that packets are discarded in the network stack.  Alerts
356
+	  are broadcast via netlink socket to any listening user space
357
+	  process.  If you don't need network drop alerts, or if you are ok
358
+	  just checking the various proc files and other utilities for
359
+	  drop statistics, say N here.
365360 
366361 endmenu
367362 
....@@ -401,7 +396,7 @@
401396 
402397 config LWTUNNEL
403398 	bool "Network light weight tunnels"
404
-	---help---
399
+	help
405400 	  This feature provides an infrastructure to support light weight
406401 	  tunnels like mpls. There is no netdevice associated with a light
407402 	  weight tunnel endpoint. Tunnel encapsulation parameters are stored
....@@ -409,9 +404,9 @@
409404 
410405 config LWTUNNEL_BPF
411406 	bool "Execute BPF program as route nexthop action"
412
-	depends on LWTUNNEL
407
+	depends on LWTUNNEL && INET
413408 	default y if LWTUNNEL=y
414
-	---help---
409
+	help
415410 	  Allows to run BPF programs as a nexthop action following a route
416411 	  lookup for incoming and outgoing packets.
417412 
....@@ -426,24 +421,20 @@
426421 config SOCK_VALIDATE_XMIT
427422 	bool
428423 
429
-config NET_DEVLINK
430
-	tristate "Network physical/parent device Netlink interface"
424
+config NET_SOCK_MSG
425
+	bool
426
+	default n
431427 	help
432
-	  Network physical/parent device Netlink interface provides
433
-	  infrastructure to support access to physical chip-wide config and
434
-	  monitoring.
428
+	  The NET_SOCK_MSG provides a framework for plain sockets (e.g. TCP) or
429
+	  ULPs (upper layer modules, e.g. TLS) to process L7 application data
430
+	  with the help of BPF programs.
435431 
436
-config MAY_USE_DEVLINK
437
-	tristate
438
-	default m if NET_DEVLINK=m
439
-	default y if NET_DEVLINK=y || NET_DEVLINK=n
440
-	help
441
-	  Drivers using the devlink infrastructure should have a dependency
442
-	  on MAY_USE_DEVLINK to ensure they do not cause link errors when
443
-	  devlink is a loadable module and the driver using it is built-in.
432
+config NET_DEVLINK
433
+	bool
434
+	default n
444435 
445436 config PAGE_POOL
446
-       bool
437
+	bool
447438 
448439 config FAILOVER
449440 	tristate "Generic failover module"
....@@ -458,6 +449,14 @@
458449 	  migration of VMs with direct attached VFs by failing over to the
459450 	  paravirtual datapath when the VF is unplugged.
460451 
452
+config ETHTOOL_NETLINK
453
+	bool "Netlink interface for ethtool"
454
+	default y
455
+	help
456
+	  An alternative userspace interface for ethtool based on generic
457
+	  netlink. It provides better extensibility and some new features,
458
+	  e.g. notification messages.
459
+
461460 endif   # if NET
462461 
463462 # Used by archs to tell that they support BPF JIT compiler plus which flavour.