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bpf: make mlx4 compatible w/ bpf_xdp_adjust_tail

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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 mlx4 driver we will just calculate packet's length unconditionally
(the same way as it's already being done in mlx5)

Acked-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Tariq Toukan <tariqt@mellanox.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 21:42:15 -07:00 committed by Daniel Borkmann
parent 198d83bb3b
commit e5e0a59b7c
1 changed files with 1 additions and 1 deletions
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2
drivers/net/ethernet/mellanox/mlx4/en_rx.c
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@ -775,8 +775,8 @@ int mlx4_en_process_rx_cq(struct net_device *dev, struct mlx4_en_cq *cq, int bud
act = bpf_prog_run_xdp(xdp_prog, &xdp);
length = xdp.data_end - xdp.data;
if (xdp.data != orig_data) {
length = xdp.data_end - xdp.data;
frags[0].page_offset = xdp.data -
xdp.data_hard_start;
va = xdp.data;