igb: add correct exception tracing for XDP

Add missing exception tracing to XDP when a number of different
errors can occur. The support was only partial. Several errors
where not logged which would confuse the user quite a lot not
knowing where and why the packets disappeared.

Fixes: 9cbc948b5a20 ("igb: add XDP support")
Reported-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: Magnus Karlsson <magnus.karlsson@intel.com>
Tested-by: Vishakha Jambekar <vishakha.jambekar@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>

diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c
index 0123285..b2a042f 100644 (file)
--- a/drivers/net/ethernet/intel/igb/igb_main.c
+++ b/drivers/net/ethernet/intel/igb/igb_main.c
@@ -8394,18 +8394,20 @@ static struct sk_buff *igb_run_xdp(struct igb_adapter *adapter,
                break;
        case XDP_TX:
                result = igb_xdp_xmit_back(adapter, xdp);
+               if (result == IGB_XDP_CONSUMED)
+                       goto out_failure;
                break;
        case XDP_REDIRECT:
                err = xdp_do_redirect(adapter->netdev, xdp, xdp_prog);
-               if (!err)
-                       result = IGB_XDP_REDIR;
-               else
-                       result = IGB_XDP_CONSUMED;
+               if (err)
+                       goto out_failure;
+               result = IGB_XDP_REDIR;
                break;
        default:
                bpf_warn_invalid_xdp_action(act);
                fallthrough;
        case XDP_ABORTED:
+out_failure:
                trace_xdp_exception(rx_ring->netdev, xdp_prog, act);
                fallthrough;
        case XDP_DROP: