From 2caa867491015579fa330da6277caac7d36b9887 Mon Sep 17 00:00:00 2001 From: Wenjuan Geng Date: Tue, 23 Aug 2022 11:01:22 +0200 Subject: [PATCH] nfp: flower: support case of match on ct_state(0/0x3f) is_post_ct_flow() function will process only ct_state ESTABLISHED, then offload_pre_check() function will check FLOW_DISSECTOR_KEY_CT flag. When config tc filter match ct_state(0/0x3f), dissector->used_keys with FLOW_DISSECTOR_KEY_CT bit, function offload_pre_check() will return false, so not offload. This is a special case that can be handled safely. Therefore, modify to let initial packet which won't go through conntrack can be offloaded, as long as the cared ct fields are all zero. Signed-off-by: Wenjuan Geng Reviewed-by: Louis Peens Signed-off-by: Simon Horman Link: https://lore.kernel.org/r/20220823090122.403631-1-simon.horman@corigine.com Signed-off-by: Paolo Abeni --- drivers/net/ethernet/netronome/nfp/flower/offload.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/drivers/net/ethernet/netronome/nfp/flower/offload.c b/drivers/net/ethernet/netronome/nfp/flower/offload.c index 83c97154c0c72..3ab3e4536b998 100644 --- a/drivers/net/ethernet/netronome/nfp/flower/offload.c +++ b/drivers/net/ethernet/netronome/nfp/flower/offload.c @@ -1301,9 +1301,14 @@ static bool offload_pre_check(struct flow_cls_offload *flow) { struct flow_rule *rule = flow_cls_offload_flow_rule(flow); struct flow_dissector *dissector = rule->match.dissector; + struct flow_match_ct ct; - if (dissector->used_keys & BIT(FLOW_DISSECTOR_KEY_CT)) - return false; + if (dissector->used_keys & BIT(FLOW_DISSECTOR_KEY_CT)) { + flow_rule_match_ct(rule, &ct); + /* Allow special case where CT match is all 0 */ + if (memchr_inv(ct.key, 0, sizeof(*ct.key))) + return false; + } if (flow->common.chain_index) return false; -- 2.39.5