bpf: make virtio 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 virtio driver we need to adjust XDP_PASS handling by recalculating
length of the packet if it was passed to the TCP/IP stack

Reviewed-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Nikita V. Shirokov <tehnerd@tehnerd.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>

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Nikita V. Shirokov 2018-04-17 21:42:20 -07:00 • committed by Daniel Borkmann

parent 8fb58f1ecf

commit 6870de435b

1 changed files with 6 additions and 1 deletions

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7

drivers/net/virtio_net.c

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