selftests: net: Enable legacy netfilter legacy options.

Some specified options rely on NETFILTER_XTABLES_LEGACY to be enabled.
IP_NF_TARGET_TTL for instance depends on IP_NF_MANGLE which in turn
depends on IP_NF_IPTABLES_LEGACY -> NETFILTER_XTABLES_LEGACY.

Enable relevant iptables config options explicitly, this is needed
to avoid breakage when symbols related to iptables-legacy
will depend on NETFILTER_LEGACY resp. IP_TABLES_LEGACY.

This also means that the classic tables (Kernel modules) will
not be enabled by default, so enable them too.

Signed-off-by: Florian Westphal <[e-mail]>
[bigeasy: Split out the config bits from the main patch]
Signed-off-by: Sebastian Andrzej Siewior <[e-mail]>
Signed-off-by: Pablo Neira Ayuso <[e-mail]>

tools/testing/selftests/bpf/config

···
 CONFIG_NF_TABLES_IPV4=y
 CONFIG_NF_TABLES_IPV6=y
 CONFIG_NETFILTER_INGRESS=y
+CONFIG_NETFILTER_XTABLES_LEGACY=y
 CONFIG_NF_FLOW_TABLE=y
 CONFIG_NF_FLOW_TABLE_INET=y
 CONFIG_NETFILTER_NETLINK=y

tools/testing/selftests/hid/config.common

···
 CONFIG_NETFILTER_NETLINK_LOG=y
 CONFIG_NETFILTER_NETLINK_QUEUE=y
 CONFIG_NETFILTER_XTABLES=y
+CONFIG_NETFILTER_XTABLES_LEGACY=y
 CONFIG_NETFILTER_XT_MATCH_ADDRTYPE=y
 CONFIG_NETFILTER_XT_MATCH_BPF=y
 CONFIG_NETFILTER_XT_MATCH_COMMENT=y

tools/testing/selftests/net/config

···
 CONFIG_NET_FOU_IP_TUNNELS=y
 CONFIG_NETFILTER=y
 CONFIG_NETFILTER_ADVANCED=y
+CONFIG_NETFILTER_XTABLES_LEGACY=y
 CONFIG_NF_CONNTRACK=m
 CONFIG_IPV6_MROUTE=y
 CONFIG_IPV6_SIT=y
 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_MANGLE=m
+CONFIG_IP6_NF_FILTER=m
 CONFIG_IP6_NF_NAT=m
 CONFIG_IP6_NF_RAW=m
+CONFIG_IP_NF_MANGLE=m
+CONFIG_IP_NF_FILTER=m
 CONFIG_IP_NF_NAT=m
 CONFIG_IP_NF_RAW=m
+CONFIG_IP_NF_TARGET_REJECT=m
+CONFIG_IP6_NF_TARGET_REJECT=m
 CONFIG_IP_NF_TARGET_TTL=m
 CONFIG_IPV6_GRE=m
 CONFIG_IPV6_SEG6_LWTUNNEL=y
···
 CONFIG_NF_TABLES_IPV4=y
 CONFIG_NFT_NAT=m
 CONFIG_NETFILTER_XT_MATCH_LENGTH=m
+CONFIG_NETFILTER_XT_TARGET_HL=m
+CONFIG_NETFILTER_XT_NAT=m
 CONFIG_NET_ACT_CSUM=m
 CONFIG_NET_ACT_CT=m
 CONFIG_NET_ACT_GACT=m

tools/testing/selftests/net/mptcp/config

···
 CONFIG_NF_TABLES=m
 CONFIG_NFT_COMPAT=m
 CONFIG_NETFILTER_XTABLES=m
+CONFIG_NETFILTER_XTABLES_LEGACY=y
 CONFIG_NETFILTER_XT_MATCH_BPF=m
 CONFIG_NETFILTER_XT_MATCH_LENGTH=m
 CONFIG_NETFILTER_XT_MATCH_STATISTIC=m
···
 CONFIG_IP_NF_FILTER=m
 CONFIG_IP_NF_MANGLE=m
 CONFIG_IP_NF_TARGET_REJECT=m
+CONFIG_IP6_NF_TARGET_REJECT=m
 CONFIG_IPV6_MULTIPLE_TABLES=y
 CONFIG_IP6_NF_FILTER=m
 CONFIG_NET_ACT_CSUM=m

tools/testing/selftests/net/netfilter/config

···
 CONFIG_AUDIT=y
 CONFIG_BPF_SYSCALL=y
 CONFIG_BRIDGE=m
+CONFIG_NETFILTER_XTABLES_LEGACY=y
+CONFIG_BRIDGE_NF_EBTABLES_LEGACY=m
 CONFIG_BRIDGE_EBT_BROUTE=m
 CONFIG_BRIDGE_EBT_IP=m
 CONFIG_BRIDGE_EBT_REDIRECT=m
···
 CONFIG_IP_NF_MATCH_RPFILTER=m
 CONFIG_IP6_NF_MATCH_RPFILTER=m
 CONFIG_IP_NF_IPTABLES=m
+CONFIG_IP_NF_IPTABLES_LEGACY=m
 CONFIG_IP6_NF_IPTABLES=m
+CONFIG_IP6_NF_IPTABLES_LEGACY=m
+CONFIG_IP_NF_NAT=m
 CONFIG_IP_NF_FILTER=m
 CONFIG_IP6_NF_FILTER=m
 CONFIG_IP_NF_RAW=m

tools/testing/selftests/wireguard/qemu/kernel.config

···
 CONFIG_NF_CONNTRACK=y
 CONFIG_NF_NAT=y
 CONFIG_NETFILTER_XTABLES=y
+CONFIG_NETFILTER_XTABLES_LEGACY=y
 CONFIG_NETFILTER_XT_NAT=y
 CONFIG_NETFILTER_XT_MATCH_LENGTH=y
 CONFIG_NETFILTER_XT_MARK=y
+CONFIG_NETFILTER_XT_TARGET_MASQUERADE=m
+CONFIG_IP_NF_TARGET_REJECT=m
+CONFIG_IP6_NF_TARGET_REJECT=m
 CONFIG_IP_NF_IPTABLES=y
 CONFIG_IP_NF_FILTER=y
 CONFIG_IP_NF_MANGLE=y