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bpf: make netronome nfp compatible w/ bpf_xdp_adjust_tail 

w/ bpf_xdp_adjust_tail helper xdp's data_end pointer could be changed as
well (only "decrease" of pointer's location is going to be supported).
changing of this pointer will change packet's size.
for nfp driver we will just calculate packet's length unconditionally

Acked-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Nikita V. Shirokov <tehnerd@tehnerd.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
This commit is contained in:
Nikita V. Shirokov 2018-04-17 21:42:18 -07:00 committed by Daniel Borkmann
parent a48ce00f9a
commit 5a6a22e378
1 changed files with 1 additions and 1 deletions
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drivers/net/ethernet/netronome/nfp/nfp_net_common.c
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@ -1722,7 +1722,7 @@ static int nfp_net_rx(struct nfp_net_rx_ring *rx_ring, int budget)
act = bpf_prog_run_xdp(xdp_prog, &xdp);
pkt_len -= xdp.data - orig_data;
pkt_len = xdp.data_end - xdp.data;
pkt_off += xdp.data - orig_data;
switch (act) {