diff options
| author | Lorenzo Bianconi <lorenzo@kernel.org> | 2022-03-11 12:14:18 +0300 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2022-03-17 22:33:52 +0300 |
| commit | 5142239a22219921a7863cf00c9ab853c00689d8 (patch) | |
| tree | 5c43ec4b1efc07fee6947108900173ec562c9dea /include | |
| parent | ad13baf4569152b00de11949b8c93aaa83c1243f (diff) | |
| download | linux-5142239a22219921a7863cf00c9ab853c00689d8.tar.xz | |
net: veth: Account total xdp_frame len running ndo_xdp_xmit
Even if this is a theoretical issue since it is not possible to perform
XDP_REDIRECT on a non-linear xdp_frame, veth driver does not account
paged area in ndo_xdp_xmit function pointer.
Introduce xdp_get_frame_len utility routine to get the xdp_frame full
length and account total frame size running XDP_REDIRECT of a
non-linear xdp frame into a veth device.
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Toke Hoiland-Jorgensen <toke@redhat.com>
Acked-by: John Fastabend <john.fastabend@gmail.com>
Link: https://lore.kernel.org/bpf/54f9fd3bb65d190daf2c0bbae2f852ff16cfbaa0.1646989407.git.lorenzo@kernel.org
Diffstat (limited to 'include')
| -rw-r--r-- | include/net/xdp.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/include/net/xdp.h b/include/net/xdp.h index b7721c3e4d1f..04c852c7a77f 100644 --- a/include/net/xdp.h +++ b/include/net/xdp.h @@ -343,6 +343,20 @@ out: __xdp_release_frame(xdpf->data, mem); } +static __always_inline unsigned int xdp_get_frame_len(struct xdp_frame *xdpf) +{ + struct skb_shared_info *sinfo; + unsigned int len = xdpf->len; + + if (likely(!xdp_frame_has_frags(xdpf))) + goto out; + + sinfo = xdp_get_shared_info_from_frame(xdpf); + len += sinfo->xdp_frags_size; +out: + return len; +} + int __xdp_rxq_info_reg(struct xdp_rxq_info *xdp_rxq, struct net_device *dev, u32 queue_index, unsigned int napi_id, u32 frag_size); |