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authorJesper Dangaard Brouer <brouer@redhat.com>2018-05-24 16:46:17 +0200
committerAlexei Starovoitov <ast@kernel.org>2018-05-24 18:36:15 -0700
commite74de52e55c092e7113f839e74400ce9dbe12ceb (patch)
tree811913647e2becd8bfa53ea1a36bf4dc631aeb1d /kernel/bpf
parent735fc4054b3a25034445c6713d259da0f96f8131 (diff)
downloadlinux-e74de52e55c092e7113f839e74400ce9dbe12ceb.tar.bz2
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 <brouer@redhat.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'kernel/bpf')
-rw-r--r--kernel/bpf/devmap.c5
1 files changed, 3 insertions, 2 deletions
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: