From: Nicolas Dichtel nicolas.dichtel@6wind.com
stable inclusion from stable-v5.10.85 commit 74685aaecef07f59d814e4eed877094c50260e9e bugzilla: 186032 https://gitee.com/openeuler/kernel/issues/I4QVI4
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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commit d43b75fbc23f0ac1ef9c14a5a166d3ccb761a451 upstream.
After the below patch, the conntrack attached to skb is set to "notrack" in the context of vrf device, for locally generated packets. But this is true only when the default qdisc is set to the vrf device. When changing the qdisc, notrack is not set anymore. In fact, there is a shortcut in the vrf driver, when the default qdisc is set, see commit dcdd43c41e60 ("net: vrf: performance improvements for IPv4") for more details.
This patch ensures that the behavior is always the same, whatever the qdisc is.
To demonstrate the difference, a new test is added in conntrack_vrf.sh.
Fixes: 8c9c296adfae ("vrf: run conntrack only in context of lower/physdev for locally generated packets") Signed-off-by: Nicolas Dichtel nicolas.dichtel@6wind.com Acked-by: Florian Westphal fw@strlen.de Reviewed-by: David Ahern dsahern@kernel.org Signed-off-by: Pablo Neira Ayuso pablo@netfilter.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Chen Jun chenjun102@huawei.com Signed-off-by: Zheng Zengkai zhengzengkai@huawei.com --- drivers/net/vrf.c | 8 ++--- .../selftests/netfilter/conntrack_vrf.sh | 30 ++++++++++++++++--- 2 files changed, 30 insertions(+), 8 deletions(-)
diff --git a/drivers/net/vrf.c b/drivers/net/vrf.c index 570e1d11ddc7..8ab0b5a8dfef 100644 --- a/drivers/net/vrf.c +++ b/drivers/net/vrf.c @@ -771,8 +771,6 @@ static struct sk_buff *vrf_ip6_out_direct(struct net_device *vrf_dev,
skb->dev = vrf_dev;
- vrf_nf_set_untracked(skb); - err = nf_hook(NFPROTO_IPV6, NF_INET_LOCAL_OUT, net, sk, skb, NULL, vrf_dev, vrf_ip6_out_direct_finish);
@@ -793,6 +791,8 @@ static struct sk_buff *vrf_ip6_out(struct net_device *vrf_dev, if (rt6_need_strict(&ipv6_hdr(skb)->daddr)) return skb;
+ vrf_nf_set_untracked(skb); + if (qdisc_tx_is_default(vrf_dev) || IP6CB(skb)->flags & IP6SKB_XFRM_TRANSFORMED) return vrf_ip6_out_direct(vrf_dev, sk, skb); @@ -1008,8 +1008,6 @@ static struct sk_buff *vrf_ip_out_direct(struct net_device *vrf_dev,
skb->dev = vrf_dev;
- vrf_nf_set_untracked(skb); - err = nf_hook(NFPROTO_IPV4, NF_INET_LOCAL_OUT, net, sk, skb, NULL, vrf_dev, vrf_ip_out_direct_finish);
@@ -1031,6 +1029,8 @@ static struct sk_buff *vrf_ip_out(struct net_device *vrf_dev, ipv4_is_lbcast(ip_hdr(skb)->daddr)) return skb;
+ vrf_nf_set_untracked(skb); + if (qdisc_tx_is_default(vrf_dev) || IPCB(skb)->flags & IPSKB_XFRM_TRANSFORMED) return vrf_ip_out_direct(vrf_dev, sk, skb); diff --git a/tools/testing/selftests/netfilter/conntrack_vrf.sh b/tools/testing/selftests/netfilter/conntrack_vrf.sh index 91f3ef0f1192..8b5ea9234588 100644 --- a/tools/testing/selftests/netfilter/conntrack_vrf.sh +++ b/tools/testing/selftests/netfilter/conntrack_vrf.sh @@ -150,11 +150,27 @@ EOF # oifname is the vrf device. test_masquerade_vrf() { + local qdisc=$1 + + if [ "$qdisc" != "default" ]; then + tc -net $ns0 qdisc add dev tvrf root $qdisc + fi + ip netns exec $ns0 conntrack -F 2>/dev/null
ip netns exec $ns0 nft -f - <<EOF flush ruleset table ip nat { + chain rawout { + type filter hook output priority raw; + + oif tvrf ct state untracked counter + } + chain postrouting2 { + type filter hook postrouting priority mangle; + + oif tvrf ct state untracked counter + } chain postrouting { type nat hook postrouting priority 0; # NB: masquerade should always be combined with 'oif(name) bla', @@ -171,13 +187,18 @@ EOF fi
# must also check that nat table was evaluated on second (lower device) iteration. - ip netns exec $ns0 nft list table ip nat |grep -q 'counter packets 2' + ip netns exec $ns0 nft list table ip nat |grep -q 'counter packets 2' && + ip netns exec $ns0 nft list table ip nat |grep -q 'untracked counter packets [1-9]' if [ $? -eq 0 ]; then - echo "PASS: iperf3 connect with masquerade + sport rewrite on vrf device" + echo "PASS: iperf3 connect with masquerade + sport rewrite on vrf device ($qdisc qdisc)" else - echo "FAIL: vrf masq rule has unexpected counter value" + echo "FAIL: vrf rules have unexpected counter value" ret=1 fi + + if [ "$qdisc" != "default" ]; then + tc -net $ns0 qdisc del dev tvrf root + fi }
# add masq rule that gets evaluated w. outif set to veth device. @@ -213,7 +234,8 @@ EOF }
test_ct_zone_in -test_masquerade_vrf +test_masquerade_vrf "default" +test_masquerade_vrf "pfifo" test_masquerade_veth
exit $ret