From: Ilya Lipnitskiy <ilya.lipnitskiy@gmail.com>
To: Felix Fietkau <nbd@nbd.name>, John Crispin <john@phrozen.org>,
Sean Wang <sean.wang@mediatek.com>,
Mark Lee <Mark-MC.Lee@mediatek.com>,
"David S. Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>,
Matthias Brugger <matthias.bgg@gmail.com>,
Pablo Neira Ayuso <pablo@netfilter.org>,
netdev@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org
Cc: Ilya Lipnitskiy <ilya.lipnitskiy@gmail.com>
Subject: [PATCH net] net: ethernet: mtk_eth_soc: avoid creating duplicate offload entries
Date: Wed, 22 Sep 2021 16:55:48 -0700 [thread overview]
Message-ID: <20210922235548.26300-1-ilya.lipnitskiy@gmail.com> (raw)
From: Felix Fietkau <nbd@nbd.name>
Sometimes multiple CLS_REPLACE calls are issued for the same connection.
rhashtable_insert_fast does not check for these duplicates, so multiple
hardware flow entries can be created.
Fix this by checking for an existing entry early
Fixes: 502e84e2382d ("net: ethernet: mtk_eth_soc: add flow offloading support")
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Signed-off-by: Ilya Lipnitskiy <ilya.lipnitskiy@gmail.com>
---
drivers/net/ethernet/mediatek/mtk_ppe_offload.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/net/ethernet/mediatek/mtk_ppe_offload.c b/drivers/net/ethernet/mediatek/mtk_ppe_offload.c
index b5f68f66d42a..7bb1f20002b5 100644
--- a/drivers/net/ethernet/mediatek/mtk_ppe_offload.c
+++ b/drivers/net/ethernet/mediatek/mtk_ppe_offload.c
@@ -186,6 +186,9 @@ mtk_flow_offload_replace(struct mtk_eth *eth, struct flow_cls_offload *f)
int hash;
int i;
+ if (rhashtable_lookup(ð->flow_table, &f->cookie, mtk_flow_ht_params))
+ return -EEXIST;
+
if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_META)) {
struct flow_match_meta match;
--
2.33.0
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next reply other threads:[~2021-09-22 23:56 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-22 23:55 Ilya Lipnitskiy [this message]
2021-09-23 12:20 ` [PATCH net] net: ethernet: mtk_eth_soc: avoid creating duplicate offload entries patchwork-bot+netdevbpf
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