linux-kernel - RE: [v6,net-next,06/15] net: fec: add fec_enet_rx_queue

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Message-ID:
 <PAXPR04MB8510844B724FB984FB67E9138899A@PAXPR04MB8510.eurprd04.prod.outlook.com>
Date: Thu, 5 Feb 2026 06:16:08 +0000
From: Wei Fang <wei.fang@....com>
To: Jakub Kicinski <kuba@...nel.org>
CC: "ast@...nel.org" <ast@...nel.org>, "andrew+netdev@...n.ch"
	<andrew+netdev@...n.ch>, "davem@...emloft.net" <davem@...emloft.net>,
	"pabeni@...hat.com" <pabeni@...hat.com>, Clark Wang <xiaoning.wang@....com>,
	"john.fastabend@...il.com" <john.fastabend@...il.com>, "daniel@...earbox.net"
	<daniel@...earbox.net>, "sdf@...ichev.me" <sdf@...ichev.me>, Frank Li
	<frank.li@....com>, "linux-kernel@...r.kernel.org"
	<linux-kernel@...r.kernel.org>, "hawk@...nel.org" <hawk@...nel.org>,
	"horms@...nel.org" <horms@...nel.org>, "bpf@...r.kernel.org"
	<bpf@...r.kernel.org>, "edumazet@...gle.com" <edumazet@...gle.com>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>, "imx@...ts.linux.dev"
	<imx@...ts.linux.dev>, Shenwei Wang <shenwei.wang@....com>
Subject: RE: [v6,net-next,06/15] net: fec: add fec_enet_rx_queue_xdp() for XDP
 path

> > +static int fec_enet_rx_queue_xdp(struct fec_enet_private *fep, int queue,
> > +				 int budget, struct bpf_prog *prog)
> > +{
> 
> [ ... ]
> 
> > +		switch (act) {
> > +		case XDP_PASS:
> > +			rxq->stats[RX_XDP_PASS]++;
> > +			/* The packet length includes FCS, but we don't want to
> > +			 * include that when passing upstream as it messes up
> > +			 * bridging applications.
> > +			 */
> > +			skb = fec_build_skb(fep, rxq, bdp, page, pkt_len);
> > +			if (!skb)
> > +				trace_xdp_exception(ndev, prog, XDP_PASS);
> > +			else
> > +				napi_gro_receive(&fep->napi, skb);
> > +
> > +			break;
> > +		case XDP_REDIRECT:
> > +			rxq->stats[RX_XDP_REDIRECT]++;
> > +			err = xdp_do_redirect(ndev, &xdp, prog);
> > +			if (unlikely(err)) {
> > +				fec_xdp_drop(rxq, &xdp, sync);
> > +				trace_xdp_exception(ndev, prog, XDP_REDIRECT);
> > +			} else {
> > +				xdp_res |= FEC_ENET_XDP_REDIR;
> > +			}
> > +			break;
> > +		case XDP_TX:
> > +			rxq->stats[RX_XDP_TX]++;
> > +			err = fec_enet_xdp_tx_xmit(fep, cpu, &xdp, sync);
> > +			if (unlikely(err)) {
> > +				rxq->stats[RX_XDP_TX_ERRORS]++;
> > +				fec_xdp_drop(rxq, &xdp, sync);
> > +				trace_xdp_exception(ndev, prog, XDP_TX);
> > +			}
> > +			break;
> > +		default:
> > +			bpf_warn_invalid_xdp_action(ndev, prog, act);
> > +			fallthrough;
> > +		case XDP_ABORTED:
> > +			/* handle aborts by dropping packet */
> > +			fallthrough;
> > +		case XDP_DROP:
> > +			rxq->stats[RX_XDP_DROP]++;
> > +			fec_xdp_drop(rxq, &xdp, sync);
> > +			break;
> 
> Are XDP_ABORTED and invalid XDP actions being traced properly? In the

I will fix it, thanks.