netfilter: flowtable: Remove redundant hw refresh bit

commit c07531c upstream. Offloading conns could fail for multiple reasons and a hw refresh bit is set to try to reoffload it in next sw packet. But it could be in some cases and future points that the hw refresh bit is not set but a refresh could succeed. Remove the hw refresh bit and do offload refresh if requested. There won't be a new work entry if a work is already pending anyway as there is the hw pending bit. Fixes: 8b3646d ("net/sched: act_ct: Support refreshing the flow table entries") Signed-off-by: Roi Dayan <roid@nvidia.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
xanmod · Jun 3, 2021 · 6d6bc8c · 6d6bc8c
1 parent fe6921e
commit 6d6bc8c
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Showing 3 changed files with 5 additions and 6 deletions.
diff --git a/include/net/netfilter/nf_flow_table.h b/include/net/netfilter/nf_flow_table.h
@@ -126,7 +126,6 @@ enum nf_flow_flags {
 	NF_FLOW_HW,
 	NF_FLOW_HW_DYING,
 	NF_FLOW_HW_DEAD,
-	NF_FLOW_HW_REFRESH,
 	NF_FLOW_HW_PENDING,
 };
 

diff --git a/net/netfilter/nf_flow_table_core.c b/net/netfilter/nf_flow_table_core.c
@@ -259,8 +259,7 @@ void flow_offload_refresh(struct nf_flowtable *flow_table,
 {
 	flow->timeout = nf_flowtable_time_stamp + NF_FLOW_TIMEOUT;
 
-	if (likely(!nf_flowtable_hw_offload(flow_table) ||
-		   !test_and_clear_bit(NF_FLOW_HW_REFRESH, &flow->flags)))
+	if (likely(!nf_flowtable_hw_offload(flow_table)))
 		return;
 
 	nf_flow_offload_add(flow_table, flow);

diff --git a/net/netfilter/nf_flow_table_offload.c b/net/netfilter/nf_flow_table_offload.c
@@ -753,10 +753,11 @@ static void flow_offload_work_add(struct flow_offload_work *offload)
 
 	err = flow_offload_rule_add(offload, flow_rule);
 	if (err < 0)
-		set_bit(NF_FLOW_HW_REFRESH, &offload->flow->flags);
-	else
-		set_bit(IPS_HW_OFFLOAD_BIT, &offload->flow->ct->status);
+		goto out;
+
+	set_bit(IPS_HW_OFFLOAD_BIT, &offload->flow->ct->status);
 
+out:
 	nf_flow_offload_destroy(flow_rule);
 }