From: "Nikita V. Shirokov" <tehnerd@tehnerd.com>
To: Alexei Starovoitov <ast@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
Robert Richter <rric@kernel.org>,
Sunil Goutham <sgoutham@cavium.com>
Cc: netdev@vger.kernel.org, "Nikita V. Shirokov" <tehnerd@tehnerd.com>
Subject: [PATCH bpf-next v3 05/11] bpf: make cavium thunder compatible w/ bpf_xdp_adjust_tail
Date: Tue, 17 Apr 2018 21:42:17 -0700 [thread overview]
Message-ID: <20180418044223.17685-6-tehnerd@tehnerd.com> (raw)
In-Reply-To: <20180418044223.17685-1-tehnerd@tehnerd.com>
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>
---
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
next prev parent reply other threads:[~2018-04-18 13:22 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-04-18 4:42 [PATCH bpf-next v3 00/11] introduction of bpf_xdp_adjust_tail Nikita V. Shirokov
2018-04-18 4:42 ` [PATCH bpf-next v3 01/11] bpf: adding bpf_xdp_adjust_tail helper Nikita V. Shirokov
2018-04-18 17:01 ` Alexei Starovoitov
2018-04-18 4:42 ` [PATCH bpf-next v3 02/11] bpf: make generic xdp compatible w/ bpf_xdp_adjust_tail Nikita V. Shirokov
2018-04-18 4:42 ` [PATCH bpf-next v3 03/11] bpf: make mlx4 " Nikita V. Shirokov
2018-04-18 4:42 ` [PATCH bpf-next v3 04/11] bpf: make bnxt " Nikita V. Shirokov
2018-04-18 17:39 ` Michael Chan
2018-04-18 4:42 ` Nikita V. Shirokov [this message]
2018-04-18 4:42 ` [PATCH bpf-next v3 06/11] bpf: make netronome nfp " Nikita V. Shirokov
2018-04-18 4:42 ` [PATCH bpf-next v3 07/11] bpf: make tun " Nikita V. Shirokov
2018-04-18 16:16 ` Michael S. Tsirkin
2018-04-18 4:42 ` [PATCH bpf-next v3 08/11] bpf: make virtio " Nikita V. Shirokov
2018-04-18 4:42 ` [PATCH bpf-next v3 09/11] bpf: making bpf_prog_test run aware of possible data_end ptr change Nikita V. Shirokov
2018-04-18 4:42 ` [PATCH bpf-next v3 10/11] bpf: adding tests for bpf_xdp_adjust_tail Nikita V. Shirokov
2018-04-18 4:42 ` [PATCH bpf-next v3 11/11] bpf: add bpf_xdp_adjust_tail sample prog Nikita V. Shirokov
2018-04-18 22:05 ` [PATCH bpf-next v3 00/11] introduction of bpf_xdp_adjust_tail Daniel Borkmann
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