netdev - [PATCH] netfilter: Add dependency on IPV6 for NF_TABLES

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Date:	Mon, 13 Jan 2014 13:01:10 -0500
From:	Paul Gortmaker <paul.gortmaker@...driver.com>
To:	"David S. Miller" <davem@...emloft.net>,
	Pablo Neira Ayuso <pablo@...filter.org>,
	Patrick McHardy <kaber@...sh.net>,
	Jozsef Kadlecsik <kadlec@...ckhole.kfki.hu>
CC:	<netfilter@...r.kernel.org>, <netdev@...r.kernel.org>,
	Paul Gortmaker <paul.gortmaker@...driver.com>
Subject: [PATCH] netfilter: Add dependency on IPV6 for NF_TABLES_INET

Commit 1d49144c0aaa61be4e3ccbef9cc5c40b0ec5f2fe ("netfilter: nf_tables:
add "inet" table for IPv4/IPv6") allows creation of non-IPV6 enabled
.config files that will fail to configure/link as follows:

warning: (NF_TABLES_INET) selects NF_TABLES_IPV6 which has unmet direct dependencies (NET && INET && IPV6 && NETFILTER && NF_TABLES)
warning: (NF_TABLES_INET) selects NF_TABLES_IPV6 which has unmet direct dependencies (NET && INET && IPV6 && NETFILTER && NF_TABLES)
warning: (NF_TABLES_INET) selects NF_TABLES_IPV6 which has unmet direct dependencies (NET && INET && IPV6 && NETFILTER && NF_TABLES)
net/built-in.o: In function `nft_reject_eval':
nft_reject.c:(.text+0x651e8): undefined reference to `nf_ip6_checksum'
nft_reject.c:(.text+0x65270): undefined reference to `ip6_route_output'
nft_reject.c:(.text+0x656c4): undefined reference to `ip6_dst_hoplimit'
make: *** [vmlinux] Error 1

Since the feature is to allow for a mixed IPV4 and IPV6 table, it
seems sensible to make it depend on IPV6.

Cc: Patrick McHardy <kaber@...sh.net>
Cc: Pablo Neira Ayuso <pablo@...filter.org>
Signed-off-by: Paul Gortmaker <paul.gortmaker@...driver.com>

diff --git a/net/netfilter/Kconfig b/net/netfilter/Kconfig
index afe50c0f526f..c37467562fd0 100644
--- a/net/netfilter/Kconfig
+++ b/net/netfilter/Kconfig
@@ -429,7 +429,7 @@ config NF_TABLES
 	  To compile it as a module, choose M here.
 
 config NF_TABLES_INET
-	depends on NF_TABLES
+	depends on NF_TABLES && IPV6
 	select NF_TABLES_IPV4
 	select NF_TABLES_IPV6
 	tristate "Netfilter nf_tables mixed IPv4/IPv6 tables support"
-- 
1.8.5.2

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