From 8d9bc36de5fc7b64bbce7b479dbe0ffdcb31b3b5 Mon Sep 17 00:00:00 2001 From: Heng Qi Date: Sat, 14 Jan 2023 16:22:22 +0800 Subject: [PATCH] virtio-net: set up xdp for multi buffer packets When the xdp program sets xdp.frags, which means it can process multi-buffer packets over larger MTU, so we continue to support xdp. Signed-off-by: Heng Qi Reviewed-by: Xuan Zhuo Acked-by: Jason Wang Signed-off-by: David S. Miller --- drivers/net/virtio_net.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c index 81d92978cc92f..ba4d5e66a4d71 100644 --- a/drivers/net/virtio_net.c +++ b/drivers/net/virtio_net.c @@ -3106,9 +3106,9 @@ static int virtnet_xdp_set(struct net_device *dev, struct bpf_prog *prog, return -EINVAL; } - if (dev->mtu > max_sz) { - NL_SET_ERR_MSG_MOD(extack, "MTU too large to enable XDP"); - netdev_warn(dev, "XDP requires MTU less than %u\n", max_sz); + if (prog && !prog->aux->xdp_has_frags && dev->mtu > max_sz) { + NL_SET_ERR_MSG_MOD(extack, "MTU too large to enable XDP without frags"); + netdev_warn(dev, "single-buffer XDP requires MTU less than %u\n", max_sz); return -EINVAL; } -- 2.30.2