why does virtio not support IPv4 CKSUM?

jiangheng (G) jiangheng14 at huawei.com
Thu Jul 6 05:47:26 CEST 2023


Hi 

why does virtio not support IPv4 CKSUM? But support TCP/UDP cksum.

If not support ipv4 cksum, when I use GRO, the ip cksum of the packets transmitted to ip layer will be incorrect.
I have to calculate ip cksum before packet was transmiited to ip layer.
So why does virtio not support ipv4 cksum ? 


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