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Message-ID: <1705397780-11364-1-git-send-email-wangyunjian@huawei.com>
Date: Tue, 16 Jan 2024 17:36:20 +0800
From: Yunjian Wang <wangyunjian@...wei.com>
To: <willemdebruijn.kernel@...il.com>, <jasowang@...hat.com>,
<kuba@...nel.org>, <davem@...emloft.net>
CC: <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
<xudingke@...wei.com>, Yunjian Wang <wangyunjian@...wei.com>
Subject: [PATCH net] tun: add missing rx stats accounting in tun_xdp_act
There are few places on the receive path where packet receives and packet
drops were not accounted for. This patch fixes that issue.
Signed-off-by: Yunjian Wang <wangyunjian@...wei.com>
---
drivers/net/tun.c | 12 ++++++++----
1 file changed, 8 insertions(+), 4 deletions(-)
diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index afa5497f7c35..232e5319ac77 100644
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -1626,17 +1626,14 @@ static int tun_xdp_act(struct tun_struct *tun, struct bpf_prog *xdp_prog,
struct xdp_buff *xdp, u32 act)
{
int err;
+ unsigned int datasize = xdp->data_end - xdp->data;
switch (act) {
case XDP_REDIRECT:
err = xdp_do_redirect(tun->dev, xdp, xdp_prog);
- if (err)
- return err;
break;
case XDP_TX:
err = tun_xdp_tx(tun->dev, xdp);
- if (err < 0)
- return err;
break;
case XDP_PASS:
break;
@@ -1651,6 +1648,13 @@ static int tun_xdp_act(struct tun_struct *tun, struct bpf_prog *xdp_prog,
break;
}
+ if (err < 0) {
+ act = err;
+ dev_core_stats_rx_dropped_inc(tun->dev);
+ } else if (act == XDP_REDIRECT || act == XDP_TX) {
+ dev_sw_netstats_rx_add(tun->dev, datasize);
+ }
+
return act;
}
--
2.41.0
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