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authorXin Long <lucien.xin@gmail.com>2023-11-13 12:53:28 -0500
committerPaolo Abeni <pabeni@redhat.com>2023-11-16 10:10:51 +0100
commit7cd5af0e937a197295f3aa3721031f0fbae49cff (patch)
treecf86624bdb46cbf6ee5e37a2552521d5ab0fa897 /net
parentbdc454fcdc824062c6f5ebc56e898a462ac66fc6 (diff)
net: sched: do not offload flows with a helper in act_ct
There is no hardware supporting ct helper offload. However, prior to this patch, a flower filter with a helper in the ct action can be successfully set into the HW, for example (eth1 is a bnxt NIC): # tc qdisc add dev eth1 ingress_block 22 ingress # tc filter add block 22 proto ip flower skip_sw ip_proto tcp \ dst_port 21 ct_state -trk action ct helper ipv4-tcp-ftp # tc filter show dev eth1 ingress filter block 22 protocol ip pref 49152 flower chain 0 handle 0x1 eth_type ipv4 ip_proto tcp dst_port 21 ct_state -trk skip_sw in_hw in_hw_count 1 <---- action order 1: ct zone 0 helper ipv4-tcp-ftp pipe index 2 ref 1 bind 1 used_hw_stats delayed This might cause the flower filter not to work as expected in the HW. This patch avoids this problem by simply returning -EOPNOTSUPP in tcf_ct_offload_act_setup() to not allow to offload flows with a helper in act_ct. Fixes: a21b06e73191 ("net: sched: add helper support in act_ct") Signed-off-by: Xin Long <lucien.xin@gmail.com> Reviewed-by: Jamal Hadi Salim <jhs@mojatatu.com> Link: https://lore.kernel.org/r/f8685ec7702c4a448a1371a8b34b43217b583b9d.1699898008.git.lucien.xin@gmail.com Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Diffstat (limited to 'net')
-rw-r--r--net/sched/act_ct.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/net/sched/act_ct.c b/net/sched/act_ct.c
index 0db0ecf1d110..b3f4a503ee2b 100644
--- a/net/sched/act_ct.c
+++ b/net/sched/act_ct.c
@@ -1549,6 +1549,9 @@ static int tcf_ct_offload_act_setup(struct tc_action *act, void *entry_data,
if (bind) {
struct flow_action_entry *entry = entry_data;
+ if (tcf_ct_helper(act))
+ return -EOPNOTSUPP;
+
entry->id = FLOW_ACTION_CT;
entry->ct.action = tcf_ct_action(act);
entry->ct.zone = tcf_ct_zone(act);