selftests: netfilter: move to net subdir

.. so this can start re-using existing lib.sh infra in next patches.

Several of these scripts will not work, e.g. because they assume
rp_filter is disabled, or reliance on a particular version/flavor
of "netcat" tool.

Add config settings for them.

nft_trans_stress.sh script is removed, it also exists in the nftables
userspace selftests.  I do not see a reason to keep two versions in
different repositories/projects.

The settings file is removed for now:

It was used to increase the timeout to avoid slow scripts from getting
zapped by the 45s timeout, but some of the slow scripts can be sped up.
Re-add it later for scripts that cannot be sped up easily.

Update MAINTAINERS to reflect that future updates to netfilter
scripts should go through netfilter-devel@.

Signed-off-by: Florian Westphal <fw@strlen.de>
Link: https://lore.kernel.org/r/20240411233624.8129-2-fw@strlen.de
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

MAINTAINERS

@@ -15264,6 +15264,7 @@ F:	net/*/netfilter.c
 F:	net/*/netfilter/
 F:	net/bridge/br_netfilter*.c
 F:	net/netfilter/
+F:	tools/testing/selftests/net/netfilter/
 
 NETROM NETWORK LAYER
 M:	Ralf Baechle <ralf@linux-mips.org>

tools/testing/selftests/netfilter/.gitignore → tools/testing/selftests/net/netfilter/.gitignore

@@ -1,6 +1,6 @@
 # SPDX-License-Identifier: GPL-2.0-only
-nf-queue
-connect_close
 audit_logread
+connect_close
 conntrack_dump_flush
 sctp_collision
+nf_queue

tools/testing/selftests/net/netfilter/Makefile

@@ -0,0 +1,44 @@
+# SPDX-License-Identifier: GPL-2.0
+
+top_srcdir = ../../../../..
+
+HOSTPKG_CONFIG := pkg-config
+MNL_CFLAGS := $(shell $(HOSTPKG_CONFIG) --cflags libmnl 2>/dev/null)
+MNL_LDLIBS := $(shell $(HOSTPKG_CONFIG) --libs libmnl 2>/dev/null || echo -lmnl)
+
+TEST_PROGS := br_netfilter.sh bridge_brouter.sh
+TEST_PROGS += conntrack_icmp_related.sh
+TEST_PROGS += conntrack_ipip_mtu.sh
+TEST_PROGS += conntrack_tcp_unreplied.sh
+TEST_PROGS += conntrack_sctp_collision.sh
+TEST_PROGS += conntrack_vrf.sh
+TEST_PROGS += ipvs.sh
+TEST_PROGS += nf_nat_edemux.sh
+TEST_PROGS += nft_audit.sh
+TEST_PROGS += nft_concat_range.sh
+TEST_PROGS += nft_conntrack_helper.sh
+TEST_PROGS += nft_fib.sh
+TEST_PROGS += nft_flowtable.sh
+TEST_PROGS += nft_meta.sh
+TEST_PROGS += nft_nat.sh
+TEST_PROGS += nft_nat_zones.sh
+TEST_PROGS += nft_queue.sh
+TEST_PROGS += nft_synproxy.sh
+TEST_PROGS += nft_zones_many.sh
+TEST_PROGS += rpath.sh
+TEST_PROGS += xt_string.sh
+
+TEST_CUSTOM_PROGS += conntrack_dump_flush
+
+TEST_GEN_FILES = audit_logread
+TEST_GEN_FILES += conntrack_dump_flush
+TEST_GEN_FILES += connect_close nf_queue
+TEST_GEN_FILES += sctp_collision
+
+include ../../lib.mk
+
+$(OUTPUT)/nf_queue: CFLAGS += $(MNL_CFLAGS)
+$(OUTPUT)/nf_queue: LDLIBS += $(MNL_LDLIBS)
+
+$(OUTPUT)/conntrack_dump_flush: CFLAGS += $(MNL_CFLAGS)
+$(OUTPUT)/conntrack_dump_flush: LDLIBS += $(MNL_LDLIBS)

tools/testing/selftests/net/netfilter/config

@@ -0,0 +1,37 @@
+CONFIG_AUDIT=y
+CONFIG_BRIDGE_EBT_BROUTE=m
+CONFIG_BRIDGE_EBT_REDIRECT=m
+CONFIG_BRIDGE_NETFILTER=m
+CONFIG_IP_NF_MATCH_RPFILTER=m
+CONFIG_IP6_NF_MATCH_RPFILTER=m
+CONFIG_IP_SCTP=m
+CONFIG_IP_VS=m
+CONFIG_IP_VS_PROTO_TCP=y
+CONFIG_NET_CLS_U32=m
+CONFIG_NET_SCH_NETEM=m
+CONFIG_NET_SCH_HTB=m
+CONFIG_NET_IPIP=m
+CONFIG_NET_VRF=y
+CONFIG_NETFILTER_NETLINK=m
+CONFIG_NETFILTER_SYNPROXY=m
+CONFIG_NETFILTER_XT_NAT=m
+CONFIG_NETFILTER_XT_TARGET_REDIRECT=m
+CONFIG_NF_CONNTRACK=m
+CONFIG_NF_CONNTRACK_EVENTS=m
+CONFIG_NF_CONNTRACK_ZONES=y
+CONFIG_NF_CT_NETLINK=m
+CONFIG_NF_CT_PROTO_SCTP=y
+CONFIG_NF_TABLES=m
+CONFIG_NF_TABLES_INET=y
+CONFIG_NF_TABLES_IPV4=y
+CONFIG_NF_TABLES_IPV6=y
+CONFIG_NFT_CT=m
+CONFIG_NFT_FIB=m
+CONFIG_NFT_FIB_INET=m
+CONFIG_NFT_FIB_IPV4=m
+CONFIG_NFT_FIB_IPV6=m
+CONFIG_NFT_MASQ=m
+CONFIG_NFT_NAT=m
+CONFIG_NFT_QUEUE=m
+CONFIG_NFT_REDIR=m
+CONFIG_NFT_SYNPROXY=m

tools/testing/selftests/netfilter/conntrack_dump_flush.c → tools/testing/selftests/net/netfilter/conntrack_dump_flush.c

@@ -10,7 +10,7 @@
 #include <linux/netfilter/nfnetlink.h>
 #include <linux/netfilter/nfnetlink_conntrack.h>
 #include <linux/netfilter/nf_conntrack_tcp.h>
-#include "../kselftest_harness.h"
+#include "../../kselftest_harness.h"
 
 #define TEST_ZONE_ID 123
 #define NF_CT_DEFAULT_ZONE_ID 0

tools/testing/selftests/net/netfilter/lib.sh

@@ -0,0 +1,3 @@
+net_netfilter_dir=$(dirname "$(readlink -e "${BASH_SOURCE[0]}")")
+
+source "$net_netfilter_dir/../lib.sh"

tools/testing/selftests/netfilter/nft_queue.sh → tools/testing/selftests/net/netfilter/nft_queue.sh

@@ -222,9 +222,9 @@ test_queue()
 	local expected=$1
 	local last=""
 
-	# spawn nf-queue listeners
-	ip netns exec ${nsrouter} ./nf-queue -c -q 0 -t $timeout > "$TMPFILE0" &
-	ip netns exec ${nsrouter} ./nf-queue -c -q 1 -t $timeout > "$TMPFILE1" &
+	# spawn nf_queue listeners
+	ip netns exec ${nsrouter} ./nf_queue -c -q 0 -t $timeout > "$TMPFILE0" &
+	ip netns exec ${nsrouter} ./nf_queue -c -q 1 -t $timeout > "$TMPFILE1" &
 	sleep 1
 	test_ping
 	ret=$?
@@ -259,7 +259,7 @@ test_queue()
 
 test_tcp_forward()
 {
-	ip netns exec ${nsrouter} ./nf-queue -q 2 -t $timeout &
+	ip netns exec ${nsrouter} ./nf_queue -q 2 -t $timeout &
 	local nfqpid=$!
 
 	tmpfile=$(mktemp) || exit 1
@@ -285,7 +285,7 @@ test_tcp_localhost()
 	ip netns exec ${nsrouter} nc -w 5 -l -p 12345 <"$tmpfile" >/dev/null &
 	local rpid=$!
 
-	ip netns exec ${nsrouter} ./nf-queue -q 3 -t $timeout &
+	ip netns exec ${nsrouter} ./nf_queue -q 3 -t $timeout &
 	local nfqpid=$!
 
 	sleep 1
@@ -303,7 +303,7 @@ test_tcp_localhost_connectclose()
 
 	ip netns exec ${nsrouter} ./connect_close -p 23456 -t $timeout &
 
-	ip netns exec ${nsrouter} ./nf-queue -q 3 -t $timeout &
+	ip netns exec ${nsrouter} ./nf_queue -q 3 -t $timeout &
 	local nfqpid=$!
 
 	sleep 1
@@ -334,11 +334,11 @@ EOF
 	ip netns exec ${nsrouter} nc -w 5 -l -p 12345 <"$tmpfile" >/dev/null &
 	local rpid=$!
 
-	ip netns exec ${nsrouter} ./nf-queue -c -q 1 -t $timeout > "$TMPFILE2" &
+	ip netns exec ${nsrouter} ./nf_queue -c -q 1 -t $timeout > "$TMPFILE2" &
 
 	# nfqueue 1 will be called via output hook.  But this time,
         # re-queue the packet to nfqueue program on queue 2.
-	ip netns exec ${nsrouter} ./nf-queue -G -d 150 -c -q 0 -Q 1 -t $timeout > "$TMPFILE3" &
+	ip netns exec ${nsrouter} ./nf_queue -G -d 150 -c -q 0 -Q 1 -t $timeout > "$TMPFILE3" &
 
 	sleep 1
 	ip netns exec ${nsrouter} nc -w 5 127.0.0.1 12345 <"$tmpfile" > /dev/null
@@ -380,7 +380,7 @@ table inet filter {
 	}
 }
 EOF
-	ip netns exec ${ns1} ./nf-queue -q 1 -t $timeout &
+	ip netns exec ${ns1} ./nf_queue -q 1 -t $timeout &
 	local nfqpid=$!
 
 	sleep 1