netdev - [PATCH bpf 1/2] flow_dissector: Fix to use new variables for port ranges in bpf hook

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Message-Id: <20200116085133.392205-2-komachi.yoshiki@gmail.com>
Date:   Thu, 16 Jan 2020 17:51:32 +0900
From:   Yoshiki Komachi <komachi.yoshiki@...il.com>
To:     "David S. Miller" <davem@...emloft.net>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Martin KaFai Lau <kafai@...com>,
        Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>,
        Andrii Nakryiko <andriin@...com>
Cc:     Yoshiki Komachi <komachi.yoshiki@...il.com>,
        netdev@...r.kernel.org, bpf@...r.kernel.org
Subject: [PATCH bpf 1/2] flow_dissector: Fix to use new variables for port ranges in bpf hook

This patch applies new flag (FLOW_DISSECTOR_KEY_PORTS_RANGE) and
field (tp_range) to BPF flow dissector to generate appropriate flow
keys when classified by specified port ranges.

Fixes: 8ffb055beae5 ("cls_flower: Fix the behavior using port ranges with hw-offload")
Signed-off-by: Yoshiki Komachi <komachi.yoshiki@...il.com>
---
 net/core/flow_dissector.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/net/core/flow_dissector.c b/net/core/flow_dissector.c
index 2dbbb03..06bbcc3 100644
--- a/net/core/flow_dissector.c
+++ b/net/core/flow_dissector.c
@@ -876,10 +876,17 @@ static void __skb_flow_bpf_to_target(const struct bpf_flow_keys *flow_keys,
 		key_control->addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS;
 	}
 
-	if (dissector_uses_key(flow_dissector, FLOW_DISSECTOR_KEY_PORTS)) {
+	if (dissector_uses_key(flow_dissector, FLOW_DISSECTOR_KEY_PORTS))
 		key_ports = skb_flow_dissector_target(flow_dissector,
 						      FLOW_DISSECTOR_KEY_PORTS,
 						      target_container);
+	else if (dissector_uses_key(flow_dissector,
+				    FLOW_DISSECTOR_KEY_PORTS_RANGE))
+		key_ports = skb_flow_dissector_target(flow_dissector,
+						      FLOW_DISSECTOR_KEY_PORTS_RANGE,
+						      target_container);
+
+	if (key_ports) {
 		key_ports->src = flow_keys->sport;
 		key_ports->dst = flow_keys->dport;
 	}
-- 
1.8.3.1