diff options
Diffstat (limited to 'target/linux/generic/backport-5.15/608-v5.18-net-veth-Account-total-xdp_frame-len-running-ndo_xdp.patch')
| -rw-r--r-- | target/linux/generic/backport-5.15/608-v5.18-net-veth-Account-total-xdp_frame-len-running-ndo_xdp.patch | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/target/linux/generic/backport-5.15/608-v5.18-net-veth-Account-total-xdp_frame-len-running-ndo_xdp.patch b/target/linux/generic/backport-5.15/608-v5.18-net-veth-Account-total-xdp_frame-len-running-ndo_xdp.patch new file mode 100644 index 0000000000..9b16fc00b7 --- /dev/null +++ b/target/linux/generic/backport-5.15/608-v5.18-net-veth-Account-total-xdp_frame-len-running-ndo_xdp.patch @@ -0,0 +1,62 @@ +commit 5142239a22219921a7863cf00c9ab853c00689d8 +Author: Lorenzo Bianconi <lorenzo@kernel.org> +Date: Fri Mar 11 10:14:18 2022 +0100 + + 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 + +--- a/drivers/net/veth.c ++++ b/drivers/net/veth.c +@@ -501,7 +501,7 @@ static int veth_xdp_xmit(struct net_devi + struct xdp_frame *frame = frames[i]; + void *ptr = veth_xdp_to_ptr(frame); + +- if (unlikely(frame->len > max_len || ++ if (unlikely(xdp_get_frame_len(frame) > max_len || + __ptr_ring_produce(&rq->xdp_ring, ptr))) + break; + nxmit++; +@@ -862,7 +862,7 @@ static int veth_xdp_rcv(struct veth_rq * + /* ndo_xdp_xmit */ + struct xdp_frame *frame = veth_ptr_to_xdp(ptr); + +- stats->xdp_bytes += frame->len; ++ stats->xdp_bytes += xdp_get_frame_len(frame); + frame = veth_xdp_rcv_one(rq, frame, bq, stats); + if (frame) { + /* XDP_PASS */ +--- a/include/net/xdp.h ++++ b/include/net/xdp.h +@@ -295,6 +295,20 @@ 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); + void xdp_rxq_info_unreg(struct xdp_rxq_info *xdp_rxq); |