[SRU][J:linux-bluefield][PATCH v1 2/7] netfilter: flowtable: fixup UDP timeout depending on ct state

[Tony Duan]

From: Vlad Buslov <vladbu at nvidia.com>

BugLink: https://bugs.launchpad.net/bugs/2019264

Currently flow_offload_fixup_ct() function assumes that only replied UDP
connections can be offloaded and hardcodes UDP_CT_REPLIED timeout value. To
enable UDP NEW connection offload in following patches extract the actual
connections state from ct->status and set the timeout according to it.

Signed-off-by: Vlad Buslov <vladbu at nvidia.com>
Signed-off-by: David S. Miller <davem at davemloft.net>
(cherry picked from commit 0eb5acb16418898c3d813e2c2d59a7ea7763a824)
Signed-off-by: Paul Blakey <paulb at nvidia.com>
Signed-off-by: Tony Duan <yifeid at nvidia.com>
---
 net/netfilter/nf_flow_table_core.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/net/netfilter/nf_flow_table_core.c b/net/netfilter/nf_flow_table_core.c
index 4f61eb1..946cdcc 100644
--- a/net/netfilter/nf_flow_table_core.c
+++ b/net/netfilter/nf_flow_table_core.c
@@ -192,8 +192,11 @@ static void flow_offload_fixup_ct(struct nf_conn *ct)
 		timeout -= tn->offload_timeout;
 	} else if (l4num == IPPROTO_UDP) {
 		struct nf_udp_net *tn = nf_udp_pernet(net);
+		enum udp_conntrack state =
+			test_bit(IPS_SEEN_REPLY_BIT, &ct->status) ?
+			UDP_CT_REPLIED : UDP_CT_UNREPLIED;
 
-		timeout = tn->timeouts[UDP_CT_REPLIED];
+		timeout = tn->timeouts[state];
 		timeout -= tn->offload_timeout;
 	} else {
 		return;
-- 
1.8.3.1