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net/sched: act_ct: Fix flow table lookup after ct clear or switching zones

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Flow table lookup is skipped if packet either went through ct clear
action (which set the IP_CT_UNTRACKED flag on the packet), or while
switching zones and there is already a connection associated with
the packet. This will result in no SW offload of the connection,
and the and connection not being removed from flow table with
TCP teardown (fin/rst packet).

To fix the above, remove these unneccary checks in flow
table lookup.

Fixes: 46475bb20f4b ("net/sched: act_ct: Software offload of established flows")
Signed-off-by: Paul Blakey <paulb@nvidia.com>
Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Paul Blakey 2022-02-17 11:30:48 +02:00 committed by David S. Miller
parent 4224cfd7fb
commit 2f131de361
1 changed files with 0 additions and 5 deletions
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5
net/sched/act_ct.c
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@ -533,11 +533,6 @@ static bool tcf_ct_flow_table_lookup(struct tcf_ct_params *p,
struct nf_conn *ct;
u8 dir;
/* Previously seen or loopback */
ct = nf_ct_get(skb, &ctinfo);
if ((ct && !nf_ct_is_template(ct)) || ctinfo == IP_CT_UNTRACKED)
return false;
switch (family) {
case NFPROTO_IPV4:
if (!tcf_ct_flow_table_fill_tuple_ipv4(skb, &tuple, &tcph))