[PATCH net-next] net: ethernet: ti: fix netdevice stats for XDP
From: Lorenzo Bianconi <lorenzo@kernel.org>
Date: 2021-02-03 18:08:21
Subsystem:
networking drivers, the rest, ti ethernet switch driver (cpsw) · Maintainers:
Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
Align netdevice statistics when the device is running in XDP mode to other upstream drivers. In particular reports to user-space rx packets even if they are not forwarded to the networking stack (XDP_PASS) but if they are redirected (XDP_REDIRECT), dropped (XDP_DROP) or sent back using the same interface (XDP_TX). This patch allows the system administrator to very the device is receiving data correctly. Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org> --- - this patch is compile-only tested --- drivers/net/ethernet/ti/cpsw.c | 4 +--- drivers/net/ethernet/ti/cpsw_new.c | 4 +--- drivers/net/ethernet/ti/cpsw_priv.c | 12 ++++++++++-- drivers/net/ethernet/ti/cpsw_priv.h | 2 +- 4 files changed, 13 insertions(+), 9 deletions(-)
diff --git a/drivers/net/ethernet/ti/cpsw.c b/drivers/net/ethernet/ti/cpsw.c
index 5239318e9686..fd966567464c 100644
--- a/drivers/net/ethernet/ti/cpsw.c
+++ b/drivers/net/ethernet/ti/cpsw.c@@ -403,12 +403,10 @@ static void cpsw_rx_handler(void *token, int len, int status) xdp_prepare_buff(&xdp, pa, headroom, size, false); port = priv->emac_port + cpsw->data.dual_emac; - ret = cpsw_run_xdp(priv, ch, &xdp, page, port); + ret = cpsw_run_xdp(priv, ch, &xdp, page, port, &len); if (ret != CPSW_XDP_PASS) goto requeue; - /* XDP prog might have changed packet data and boundaries */ - len = xdp.data_end - xdp.data; headroom = xdp.data - xdp.data_hard_start; /* XDP prog can modify vlan tag, so can't use encap header */
diff --git a/drivers/net/ethernet/ti/cpsw_new.c b/drivers/net/ethernet/ti/cpsw_new.c
index 94747f82c60b..58a64313ac00 100644
--- a/drivers/net/ethernet/ti/cpsw_new.c
+++ b/drivers/net/ethernet/ti/cpsw_new.c@@ -345,12 +345,10 @@ static void cpsw_rx_handler(void *token, int len, int status) xdp_prepare_buff(&xdp, pa, headroom, size, false); - ret = cpsw_run_xdp(priv, ch, &xdp, page, priv->emac_port); + ret = cpsw_run_xdp(priv, ch, &xdp, page, priv->emac_port, &len); if (ret != CPSW_XDP_PASS) goto requeue; - /* XDP prog might have changed packet data and boundaries */ - len = xdp.data_end - xdp.data; headroom = xdp.data - xdp.data_hard_start; /* XDP prog can modify vlan tag, so can't use encap header */
diff --git a/drivers/net/ethernet/ti/cpsw_priv.c b/drivers/net/ethernet/ti/cpsw_priv.c
index 99f44563e10f..bb59e768915e 100644
--- a/drivers/net/ethernet/ti/cpsw_priv.c
+++ b/drivers/net/ethernet/ti/cpsw_priv.c@@ -1323,7 +1323,7 @@ int cpsw_xdp_tx_frame(struct cpsw_priv *priv, struct xdp_frame *xdpf, } int cpsw_run_xdp(struct cpsw_priv *priv, int ch, struct xdp_buff *xdp, - struct page *page, int port) + struct page *page, int port, int *len) { struct cpsw_common *cpsw = priv->cpsw; struct net_device *ndev = priv->ndev;
@@ -1341,10 +1341,13 @@ int cpsw_run_xdp(struct cpsw_priv *priv, int ch, struct xdp_buff *xdp, } act = bpf_prog_run_xdp(prog, xdp); + /* XDP prog might have changed packet data and boundaries */ + *len = xdp->data_end - xdp->data; + switch (act) { case XDP_PASS: ret = CPSW_XDP_PASS; - break; + goto out; case XDP_TX: xdpf = xdp_convert_buff_to_frame(xdp); if (unlikely(!xdpf))
@@ -1370,8 +1373,13 @@ int cpsw_run_xdp(struct cpsw_priv *priv, int ch, struct xdp_buff *xdp, trace_xdp_exception(ndev, prog, act); fallthrough; /* handle aborts by dropping packet */ case XDP_DROP: + ndev->stats.rx_bytes += *len; + ndev->stats.rx_packets++; goto drop; } + + ndev->stats.rx_bytes += *len; + ndev->stats.rx_packets++; out: rcu_read_unlock(); return ret;
diff --git a/drivers/net/ethernet/ti/cpsw_priv.h b/drivers/net/ethernet/ti/cpsw_priv.h
index 7b7f3596b20d..a323bea54faa 100644
--- a/drivers/net/ethernet/ti/cpsw_priv.h
+++ b/drivers/net/ethernet/ti/cpsw_priv.h@@ -438,7 +438,7 @@ int cpsw_ndo_bpf(struct net_device *ndev, struct netdev_bpf *bpf); int cpsw_xdp_tx_frame(struct cpsw_priv *priv, struct xdp_frame *xdpf, struct page *page, int port); int cpsw_run_xdp(struct cpsw_priv *priv, int ch, struct xdp_buff *xdp, - struct page *page, int port); + struct page *page, int port, int *len); irqreturn_t cpsw_tx_interrupt(int irq, void *dev_id); irqreturn_t cpsw_rx_interrupt(int irq, void *dev_id); irqreturn_t cpsw_misc_interrupt(int irq, void *dev_id);
--
2.29.2