Hi,
I'm testing xdpsock on the latest bpf-next and found that rxdrop does not work.
To reproduce the issue:
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ip netns add at_ns0
ip link add p0 type veth peer name afxdp-p0
ip link set p0 netns at_ns0
ip link set dev afxdp-p0 up
ip netns exec at_ns0 sh << NS_EXEC_HEREDOC
ip addr add "10.1.1.1/24" dev p0
ip link set dev p0 up
NS_EXEC_HEREDOC
ip addr add "10.1.1.2/24" dev afxdp-p0
ip netns exec at_ns0 ping 10.1.1.2
# the afxdp-p0 will receive ping packets
At another console, run SKB mode rxdrop
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root@osboxes:~/bpf-next/samples/bpf# ./xdpsock -r -S -p -i afxdp-p0
sock0@afxdp-p0:0 rxdrop xdp-skb poll()
pps pkts 1.00
rx 0 0
tx 0 0
Where I think xdpsock should receive packet here, but it's not.
it turns out at rx_drop(),
514 ret = xsk_ring_prod__reserve(&xsk->umem->fq, rcvd, &idx_fq);
515 while (ret != rcvd) {
518 if (ret < 0)
519 exit_with_error(-ret);
520 ret = xsk_ring_prod__reserve(&xsk->umem->fq, rcvd, &idx_fq);
521 }
It keeps retrying to reserve blocks in FQ but fails. I'm debugging
this but any suggestions
are welcome.
Regards,
William
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