diff options
Diffstat (limited to 'target/linux/generic/backport-5.15/609-v5.18-veth-Allow-jumbo-frames-in-xdp-mode.patch')
| -rw-r--r-- | target/linux/generic/backport-5.15/609-v5.18-veth-Allow-jumbo-frames-in-xdp-mode.patch | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/target/linux/generic/backport-5.15/609-v5.18-veth-Allow-jumbo-frames-in-xdp-mode.patch b/target/linux/generic/backport-5.15/609-v5.18-veth-Allow-jumbo-frames-in-xdp-mode.patch new file mode 100644 index 0000000000..8080d621da --- /dev/null +++ b/target/linux/generic/backport-5.15/609-v5.18-veth-Allow-jumbo-frames-in-xdp-mode.patch @@ -0,0 +1,35 @@ +commit 7cda76d858a4e71ac4a04066c093679a12e1312c +Author: Lorenzo Bianconi <lorenzo@kernel.org> +Date: Fri Mar 11 10:14:20 2022 +0100 + + veth: Allow jumbo frames in xdp mode + + Allow increasing the MTU over page boundaries on veth devices + if the attached xdp program declares to support xdp fragments. + + Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org> + Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> + Acked-by: Toke Høiland-Jørgensen <toke@redhat.com> + Acked-by: John Fastabend <john.fastabend@gmail.com> + Link: https://lore.kernel.org/bpf/d5dc039c3d4123426e7023a488c449181a7bc57f.1646989407.git.lorenzo@kernel.org + +--- a/drivers/net/veth.c ++++ b/drivers/net/veth.c +@@ -1470,9 +1470,14 @@ static int veth_xdp_set(struct net_devic + goto err; + } + +- max_mtu = PAGE_SIZE - VETH_XDP_HEADROOM - +- peer->hard_header_len - +- SKB_DATA_ALIGN(sizeof(struct skb_shared_info)); ++ max_mtu = SKB_WITH_OVERHEAD(PAGE_SIZE - VETH_XDP_HEADROOM) - ++ peer->hard_header_len; ++ /* Allow increasing the max_mtu if the program supports ++ * XDP fragments. ++ */ ++ //if (prog->aux->xdp_has_frags) ++ max_mtu += PAGE_SIZE * MAX_SKB_FRAGS; ++ + if (peer->mtu > max_mtu) { + NL_SET_ERR_MSG_MOD(extack, "Peer MTU is too large to set XDP"); + err = -ERANGE; |