From e74de52e55c092e7113f839e74400ce9dbe12ceb Mon Sep 17 00:00:00 2001 From: Jesper Dangaard Brouer Date: Thu, 24 May 2018 16:46:17 +0200 Subject: xdp/trace: extend tracepoint in devmap with an err Extending tracepoint xdp:xdp_devmap_xmit in devmap with an err code allow people to easier identify the reason behind the ndo_xdp_xmit call to a given driver is failing. Signed-off-by: Jesper Dangaard Brouer Signed-off-by: Alexei Starovoitov --- kernel/bpf/devmap.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) (limited to 'kernel/bpf') diff --git a/kernel/bpf/devmap.c b/kernel/bpf/devmap.c index 77908311ec98..ae16d0c373ef 100644 --- a/kernel/bpf/devmap.c +++ b/kernel/bpf/devmap.c @@ -220,7 +220,7 @@ static int bq_xmit_all(struct bpf_dtab_netdev *obj, struct xdp_bulk_queue *bq) { struct net_device *dev = obj->dev; - int sent = 0, drops = 0; + int sent = 0, drops = 0, err = 0; int i; if (unlikely(!bq->count)) @@ -234,6 +234,7 @@ static int bq_xmit_all(struct bpf_dtab_netdev *obj, sent = dev->netdev_ops->ndo_xdp_xmit(dev, bq->count, bq->q); if (sent < 0) { + err = sent; sent = 0; goto error; } @@ -242,7 +243,7 @@ out: bq->count = 0; trace_xdp_devmap_xmit(&obj->dtab->map, obj->bit, - sent, drops, bq->dev_rx, dev); + sent, drops, bq->dev_rx, dev, err); bq->dev_rx = NULL; return 0; error: -- cgit v1.2.1