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devmap: Adjust tracepoint for map-less queue flush

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Now that we don't have a reference to a devmap when flushing the device
bulk queue, let's change the the devmap_xmit tracepoint to remote the
map_id and map_index fields entirely. Rearrange the fields so 'drops' and
'sent' stay in the same position in the tracepoint struct, to make it
possible for the xdp_monitor utility to read both the old and the new
format.

Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/157918768613.1458396.9165902403373826572.stgit@toke.dk
This commit is contained in:
Jesper Dangaard Brouer 2020-01-16 16:14:46 +01:00 • committed by Alexei Starovoitov
parent 1d233886dd
commit 58aa94f922
3 changed files with 16 additions and 23 deletions
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2
kernel/bpf/devmap.c
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@ -340,7 +340,7 @@ static int bq_xmit_all(struct xdp_dev_bulk_queue *bq, u32 flags)
out:
bq->count = 0;
trace_xdp_devmap_xmit(NULL, 0, sent, drops, bq->dev_rx, dev, err);
trace_xdp_devmap_xmit(bq->dev_rx, dev, sent, drops, err);
bq->dev_rx = NULL;
__list_del_clearprev(&bq->flush_node);
return 0;