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2023-12-11 072de836f53be56a70cecf70b43ae43b7ce17376 
 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.
....@@ -254,13 +262,13 @@
254262 	default y
255263 
256264 config HWBM
257
-       bool
265
+	bool
258266 
259267 config CGROUP_NET_PRIO
260268 	bool "Network priority cgroup"
261269 	depends on CGROUPS
262270 	select SOCK_CGROUP_DATA
263
-	---help---
271
+	help
264272 	  Cgroup subsystem for use in assigning processes to network priorities on
265273 	  a per-interface basis.
266274 
....@@ -268,13 +276,13 @@
268276 	bool "Network classid cgroup"
269277 	depends on CGROUPS
270278 	select SOCK_CGROUP_DATA
271
-	---help---
279
+	help
272280 	  Cgroup subsystem for use as general purpose socket classid marker that is
273281 	  being used in cls_cgroup and for netfilter matching.
274282 
275283 config NET_RX_BUSY_POLL
276284 	bool
277
-	default y if !PREEMPT_RT_FULL
285
+	default y
278286 
279287 config BQL
280288 	bool
....@@ -286,7 +294,7 @@
286294 	bool "enable BPF Just In Time compiler"
287295 	depends on HAVE_CBPF_JIT || HAVE_EBPF_JIT
288296 	depends on MODULES
289
-	---help---
297
+	help
290298 	  Berkeley Packet Filter filtering capabilities are normally handled
291299 	  by an interpreter. This option allows kernel to generate a native
292300 	  code when filter is loaded in memory. This should speedup
....@@ -299,35 +307,24 @@
299307 
300308 config BPF_STREAM_PARSER
301309 	bool "enable BPF STREAM_PARSER"
310
+	depends on INET
302311 	depends on BPF_SYSCALL
312
+	depends on CGROUP_BPF
303313 	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
314
+	select NET_SOCK_MSG
315315 	help
316
-	  This selects ethtool function, default is Y. If say N, ethtool function
317
-	  is not implemented.
316
+	  Enabling this allows a stream parser to be used with
317
+	  BPF_MAP_TYPE_SOCKMAP.
318318 
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.
319
+	  BPF_MAP_TYPE_SOCKMAP provides a map type to use with network sockets.
320
+	  It can be used to enforce socket policy, implement socket redirects,
321
+	  etc.
325322 
326323 config NET_FLOW_LIMIT
327324 	bool
328325 	depends on RPS
329326 	default y
330
-	---help---
327
+	help
331328 	  The network stack has to drop packets when a receive processing CPU's
332329 	  backlog reaches netdev_max_backlog. If a few out of many active flows
333330 	  generate the vast majority of load, drop their traffic earlier to
....@@ -340,14 +337,14 @@
340337 config NET_PKTGEN
341338 	tristate "Packet Generator (USE WITH CAUTION)"
342339 	depends on INET && PROC_FS
343
-	---help---
340
+	help
344341 	  This module will inject preconfigured packets, at a configurable
345342 	  rate, out of a given interface.  It is used for network interface
346343 	  stress testing and performance analysis.  If you don't understand
347344 	  what was just said, you don't need it: say N.
348345 
349346 	  Documentation on how to use the packet generator can be found
350
-	  at <file:Documentation/networking/pktgen.txt>.
347
+	  at <file:Documentation/networking/pktgen.rst>.
351348 
352349 	  To compile this code as a module, choose M here: the
353350 	  module will be called pktgen.
....@@ -355,13 +352,13 @@
355352 config NET_DROP_MONITOR
356353 	tristate "Network packet drop alerting service"
357354 	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.
355
+	help
356
+	  This feature provides an alerting service to userspace in the
357
+	  event that packets are discarded in the network stack.  Alerts
358
+	  are broadcast via netlink socket to any listening user space
359
+	  process.  If you don't need network drop alerts, or if you are ok
360
+	  just checking the various proc files and other utilities for
361
+	  drop statistics, say N here.
365362 
366363 endmenu
367364 
....@@ -401,7 +398,7 @@
401398 
402399 config LWTUNNEL
403400 	bool "Network light weight tunnels"
404
-	---help---
401
+	help
405402 	  This feature provides an infrastructure to support light weight
406403 	  tunnels like mpls. There is no netdevice associated with a light
407404 	  weight tunnel endpoint. Tunnel encapsulation parameters are stored
....@@ -409,9 +406,9 @@
409406 
410407 config LWTUNNEL_BPF
411408 	bool "Execute BPF program as route nexthop action"
412
-	depends on LWTUNNEL
409
+	depends on LWTUNNEL && INET
413410 	default y if LWTUNNEL=y
414
-	---help---
411
+	help
415412 	  Allows to run BPF programs as a nexthop action following a route
416413 	  lookup for incoming and outgoing packets.
417414 
....@@ -426,24 +423,20 @@
426423 config SOCK_VALIDATE_XMIT
427424 	bool
428425 
429
-config NET_DEVLINK
430
-	tristate "Network physical/parent device Netlink interface"
426
+config NET_SOCK_MSG
427
+	bool
428
+	default n
431429 	help
432
-	  Network physical/parent device Netlink interface provides
433
-	  infrastructure to support access to physical chip-wide config and
434
-	  monitoring.
430
+	  The NET_SOCK_MSG provides a framework for plain sockets (e.g. TCP) or
431
+	  ULPs (upper layer modules, e.g. TLS) to process L7 application data
432
+	  with the help of BPF programs.
435433 
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.
434
+config NET_DEVLINK
435
+	bool
436
+	default n
444437 
445438 config PAGE_POOL
446
-       bool
439
+	bool
447440 
448441 config FAILOVER
449442 	tristate "Generic failover module"
....@@ -458,6 +451,14 @@
458451 	  migration of VMs with direct attached VFs by failing over to the
459452 	  paravirtual datapath when the VF is unplugged.
460453 
454
+config ETHTOOL_NETLINK
455
+	bool "Netlink interface for ethtool"
456
+	default y
457
+	help
458
+	  An alternative userspace interface for ethtool based on generic
459
+	  netlink. It provides better extensibility and some new features,
460
+	  e.g. notification messages.
461
+
461462 endif   # if NET
462463 
463464 # Used by archs to tell that they support BPF JIT compiler plus which flavour.