From 9440a875b8359090fa9ae65b4fb640893c04a80d Mon Sep 17 00:00:00 2001 From: Arthur Fabre Date: Tue, 12 Nov 2019 15:36:01 +0000 Subject: [PATCH] sfc: trace_xdp_exception on XDP failure The sfc driver can drop packets processed with XDP, notably when running out of buffer space on XDP_TX, or returning an unknown XDP action. This increments the rx_xdp_bad_drops ethtool counter. Call trace_xdp_exception everywhere rx_xdp_bad_drops is incremented, except for fragmented RX packets as the XDP program hasn't run yet. This allows it to easily be monitored from userspace. This mirrors the behavior of other drivers. Signed-off-by: Arthur Fabre Acked-by: Edward Cree Signed-off-by: David S. Miller --- drivers/net/ethernet/sfc/rx.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/net/ethernet/sfc/rx.c b/drivers/net/ethernet/sfc/rx.c index a7d9841105d84..bec2619055303 100644 --- a/drivers/net/ethernet/sfc/rx.c +++ b/drivers/net/ethernet/sfc/rx.c @@ -724,6 +724,7 @@ static bool efx_do_xdp(struct efx_nic *efx, struct efx_channel *channel, netif_err(efx, rx_err, efx->net_dev, "XDP TX failed (%d)\n", err); channel->n_rx_xdp_bad_drops++; + trace_xdp_exception(efx->net_dev, xdp_prog, xdp_act); } else { channel->n_rx_xdp_tx++; } @@ -737,6 +738,7 @@ static bool efx_do_xdp(struct efx_nic *efx, struct efx_channel *channel, netif_err(efx, rx_err, efx->net_dev, "XDP redirect failed (%d)\n", err); channel->n_rx_xdp_bad_drops++; + trace_xdp_exception(efx->net_dev, xdp_prog, xdp_act); } else { channel->n_rx_xdp_redirect++; } @@ -746,6 +748,7 @@ static bool efx_do_xdp(struct efx_nic *efx, struct efx_channel *channel, bpf_warn_invalid_xdp_action(xdp_act); efx_free_rx_buffers(rx_queue, rx_buf, 1); channel->n_rx_xdp_bad_drops++; + trace_xdp_exception(efx->net_dev, xdp_prog, xdp_act); break; case XDP_ABORTED: -- 2.30.2