From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Nikita V. Shirokov" Subject: [PATCH bpf-next v2 05/11] bpf: make cavium thunder compatible w/ bpf_xdp_adjust_tail Date: Tue, 17 Apr 2018 21:29:45 -0700 Message-ID: <20180418042951.17183-6-tehnerd@tehnerd.com> References: <20180418042951.17183-1-tehnerd@tehnerd.com> Cc: netdev@vger.kernel.org, "Nikita V. Shirokov" To: Alexei Starovoitov , Daniel Borkmann , Robert Richter , Sunil Goutham Return-path: Received: from mail-pf0-f173.google.com ([209.85.192.173]:42571 "EHLO mail-pf0-f173.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751836AbeDRGFy (ORCPT ); Wed, 18 Apr 2018 02:05:54 -0400 Received: by mail-pf0-f173.google.com with SMTP id o16so368363pfk.9 for ; Tue, 17 Apr 2018 23:05:54 -0700 (PDT) In-Reply-To: <20180418042951.17183-1-tehnerd@tehnerd.com> Sender: netdev-owner@vger.kernel.org List-ID: 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 --- drivers/net/ethernet/cavium/thunder/nicvf_main.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/ethernet/cavium/thunder/nicvf_main.c b/drivers/net/ethernet/cavium/thunder/nicvf_main.c index 707db3304396..7135db45927e 100644 --- a/drivers/net/ethernet/cavium/thunder/nicvf_main.c +++ b/drivers/net/ethernet/cavium/thunder/nicvf_main.c @@ -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; } -- 2.15.1