From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B786A15AE7 for ; Wed, 20 Sep 2023 12:17:43 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 39E6AC43395; Wed, 20 Sep 2023 12:17:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1695212263; bh=v+DspCEOn3/xtlJIMq48jJAhh0klkx4wQB1BLdp+USA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=QAxOpvD4iYK3E9ZRK7wTRwBzSijpz6aIylmf6pnrzAmauBj5ABihiPSm7KjJDlWwX DjBW3EKO8Olv8ulDrbtavIn3OU8il0HUxy8IER+gbhXSI+o0ld/cjoFrvRCKNyfFDs RlZv59Nhp4KNayh8tVcYhow4bMQvoB6N8ZfZqOIs= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Liang Chen , Eric Dumazet , "David S. Miller" , Sasha Levin Subject: [PATCH 4.19 212/273] veth: Fixing transmit return status for dropped packets Date: Wed, 20 Sep 2023 13:30:52 +0200 Message-ID: <20230920112853.016576849@linuxfoundation.org> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20230920112846.440597133@linuxfoundation.org> References: <20230920112846.440597133@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 4.19-stable review patch. If anyone has any objections, please let me know. ------------------ From: Liang Chen [ Upstream commit 151e887d8ff97e2e42110ffa1fb1e6a2128fb364 ] The veth_xmit function returns NETDEV_TX_OK even when packets are dropped. This behavior leads to incorrect calculations of statistics counts, as well as things like txq->trans_start updates. Fixes: e314dbdc1c0d ("[NET]: Virtual ethernet device driver.") Signed-off-by: Liang Chen Reviewed-by: Eric Dumazet Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- drivers/net/veth.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/net/veth.c b/drivers/net/veth.c index ea999a6639330..8006a7716168f 100644 --- a/drivers/net/veth.c +++ b/drivers/net/veth.c @@ -181,6 +181,7 @@ static netdev_tx_t veth_xmit(struct sk_buff *skb, struct net_device *dev) { struct veth_priv *rcv_priv, *priv = netdev_priv(dev); struct veth_rq *rq = NULL; + int ret = NETDEV_TX_OK; struct net_device *rcv; int length = skb->len; bool rcv_xdp = false; @@ -210,6 +211,7 @@ static netdev_tx_t veth_xmit(struct sk_buff *skb, struct net_device *dev) } else { drop: atomic64_inc(&priv->dropped); + ret = NET_XMIT_DROP; } if (rcv_xdp) @@ -217,7 +219,7 @@ static netdev_tx_t veth_xmit(struct sk_buff *skb, struct net_device *dev) rcu_read_unlock(); - return NETDEV_TX_OK; + return ret; } static u64 veth_stats_one(struct pcpu_vstats *result, struct net_device *dev) -- 2.40.1