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 <hengqi@xxxxxxxxxxxxxxxxx>
Reviewed-by: Xuan Zhuo <xuanzhuo@xxxxxxxxxxxxxxxxx>
Acked-by: Jason Wang <jasowang@xxxxxxxxxx>
---
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 1203e4176b66..60e199811212 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -3097,9 +3097,9 @@ 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;
}
--
2.19.1.6.gb485710b
