add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/net/veth.c
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@@ -285,6 +285,7 @@
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 {
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 	struct veth_priv *rcv_priv, *priv = netdev_priv(dev);
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 	struct veth_rq *rq = NULL;
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+	int ret = NETDEV_TX_OK;
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 	struct net_device *rcv;
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 	int length = skb->len;
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 	bool rcv_xdp = false;
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@@ -311,6 +312,7 @@
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 	} else {
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 drop:
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 		atomic64_inc(&priv->dropped);
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+		ret = NET_XMIT_DROP;
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 	}
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 	if (rcv_xdp)
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@@ -318,7 +320,7 @@
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 	rcu_read_unlock();
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-	return NETDEV_TX_OK;
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+	return ret;
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 }
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 static u64 veth_stats_tx(struct net_device *dev, u64 *packets, u64 *bytes)
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@@ -849,6 +851,9 @@
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 	xdp_set_return_frame_no_direct();
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 	done = veth_xdp_rcv(rq, budget, &bq, &stats);
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+	if (stats.xdp_redirect > 0)
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+		xdp_do_flush();
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+
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 	if (done < budget && napi_complete_done(napi, done)) {
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 		/* Write rx_notify_masked before reading ptr_ring */
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 		smp_store_mb(rq->rx_notify_masked, false);
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@@ -862,8 +867,6 @@
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 	if (stats.xdp_tx > 0)
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 		veth_xdp_flush(rq, &bq);
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-	if (stats.xdp_redirect > 0)
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-		xdp_do_flush();
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 	xdp_clear_return_frame_no_direct();
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 	return done;
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@@ -1312,10 +1315,7 @@
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 		nla_peer = data[VETH_INFO_PEER];
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 		ifmp = nla_data(nla_peer);
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-		err = rtnl_nla_parse_ifla(peer_tb,
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-					  nla_data(nla_peer) + sizeof(struct ifinfomsg),
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-					  nla_len(nla_peer) - sizeof(struct ifinfomsg),
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-					  NULL);
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+		err = rtnl_nla_parse_ifinfomsg(peer_tb, nla_peer, extack);
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 		if (err < 0)
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 			return err;
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