linux-kernel - [PATCH nf-next v2 2/2] netfilter: Make IP6_NF_IPTABLES

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Message-ID: <20240823174855.3052334-3-leitao@debian.org>
Date: Fri, 23 Aug 2024 10:48:53 -0700
From: Breno Leitao <leitao@...ian.org>
To: fw@...len.de,
	davem@...emloft.net,
	edumazet@...gle.com,
	kuba@...nel.org,
	pabeni@...hat.com,
	Pablo Neira Ayuso <pablo@...filter.org>,
	Jozsef Kadlecsik <kadlec@...filter.org>,
	David Ahern <dsahern@...nel.org>,
	Shuah Khan <shuah@...nel.org>
Cc: rbc@...a.com,
	netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	netfilter-devel@...r.kernel.org (open list:NETFILTER),
	coreteam@...filter.org (open list:NETFILTER),
	linux-kselftest@...r.kernel.org (open list:KERNEL SELFTEST FRAMEWORK)
Subject: [PATCH nf-next v2 2/2] netfilter: Make IP6_NF_IPTABLES_LEGACY selectable

This option makes IP6_NF_IPTABLES_LEGACY user selectable, giving
users the option to configure iptables without enabling any other
config.

Signed-off-by: Breno Leitao <leitao@...ian.org>
---
 net/ipv6/netfilter/Kconfig         | 22 ++++++++++++----------
 tools/testing/selftests/net/config |  1 +
 2 files changed, 13 insertions(+), 10 deletions(-)

diff --git a/net/ipv6/netfilter/Kconfig b/net/ipv6/netfilter/Kconfig
index f3c8e2d918e1..dad0a50d3ef4 100644
--- a/net/ipv6/netfilter/Kconfig
+++ b/net/ipv6/netfilter/Kconfig
@@ -8,7 +8,13 @@ menu "IPv6: Netfilter Configuration"
 
 # old sockopt interface and eval loop
 config IP6_NF_IPTABLES_LEGACY
-	tristate
+	tristate "Legacy IP6 tables support"
+	depends on INET && IPV6
+	select NETFILTER_XTABLES
+	default n
+	help
+	  ip6tables is a general, extensible packet identification legacy framework.
+	  This is not needed if you are using iptables over nftables (iptables-nft).
 
 config NF_SOCKET_IPV6
 	tristate "IPv6 socket lookup support"
@@ -190,7 +196,7 @@ config IP6_NF_TARGET_HL
 config IP6_NF_FILTER
 	tristate "Packet filtering"
 	default m if NETFILTER_ADVANCED=n
-	select IP6_NF_IPTABLES_LEGACY
+	depends on IP6_NF_IPTABLES_LEGACY
 	tristate
 	help
 	  Packet filtering defines a table `filter', which has a series of
@@ -227,7 +233,7 @@ config IP6_NF_TARGET_SYNPROXY
 config IP6_NF_MANGLE
 	tristate "Packet mangling"
 	default m if NETFILTER_ADVANCED=n
-	select IP6_NF_IPTABLES_LEGACY
+	depends on IP6_NF_IPTABLES_LEGACY
 	help
 	  This option adds a `mangle' table to iptables: see the man page for
 	  iptables(8).  This table is used for various packet alterations
@@ -237,7 +243,7 @@ config IP6_NF_MANGLE
 
 config IP6_NF_RAW
 	tristate  'raw table support (required for TRACE)'
-	select IP6_NF_IPTABLES_LEGACY
+	depends on IP6_NF_IPTABLES_LEGACY
 	help
 	  This option adds a `raw' table to ip6tables. This table is the very
 	  first in the netfilter framework and hooks in at the PREROUTING
@@ -249,9 +255,7 @@ config IP6_NF_RAW
 # security table for MAC policy
 config IP6_NF_SECURITY
 	tristate "Security table"
-	depends on SECURITY
-	depends on NETFILTER_ADVANCED
-	select IP6_NF_IPTABLES_LEGACY
+	depends on SECURITY && NETFILTER_ADVANCED && IP6_NF_IPTABLES_LEGACY
 	help
 	  This option adds a `security' table to iptables, for use
 	  with Mandatory Access Control (MAC) policy.
@@ -260,10 +264,8 @@ config IP6_NF_SECURITY
 
 config IP6_NF_NAT
 	tristate "ip6tables NAT support"
-	depends on NF_CONNTRACK
-	depends on NETFILTER_ADVANCED
+	depends on NF_CONNTRACK && NETFILTER_ADVANCED && IP6_NF_IPTABLES_LEGACY
 	select NF_NAT
-	select IP6_NF_IPTABLES_LEGACY
 	select NETFILTER_XT_NAT
 	help
 	  This enables the `nat' table in ip6tables. This allows masquerading,
diff --git a/tools/testing/selftests/net/config b/tools/testing/selftests/net/config
index 784e2965896a..32e04837084e 100644
--- a/tools/testing/selftests/net/config
+++ b/tools/testing/selftests/net/config
@@ -34,6 +34,7 @@ CONFIG_IPV6_SIT=y
 CONFIG_IP_DCCP=m
 CONFIG_NF_NAT=m
 CONFIG_IP6_NF_IPTABLES=m
+CONFIG_IP6_NF_IPTABLES_LEGACY=m
 CONFIG_IP_NF_IPTABLES=m
 CONFIG_IP_NF_IPTABLES_LEGACY=m
 CONFIG_IP6_NF_NAT=m
-- 
2.43.5