Commit a48ce00f authored Apr 17, 2018 by Nikita V. Shirokov Committed by Daniel Borkmann Apr 18, 2018

bpf: make cavium thunder 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 cavium's thunder driver we will just calculate packet's length
unconditionally

Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Nikita V. Shirokov <tehnerd@tehnerd.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>

parent b968e735

drivers/net/ethernet/cavium/thunder/nicvf_main.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -538,9 +538,9 @@ static inline bool nicvf_xdp_rx(struct nicvf nic, struct bpf_prog prog,
		action = bpf_prog_run_xdp(prog, &xdp);
		rcu_read_unlock();

		len = xdp.data_end - xdp.data;
		/* Check if XDP program has changed headers */
		if (orig_data != xdp.data) {
		len = xdp.data_end - xdp.data;
		offset = orig_data - xdp.data;
		dma_addr -= offset;
		}