I hope you are doing well. I am working with eBPF and tc on the egress side to add a PPPoE header to forwarded and locally generated packets. Due to GSO/TSO, I observe packets larger than the MTU size, and I see outputs like skb->gso_size = 1452, skb->gso_segs = 3, skb->len = 4410. My concern is whether the MAC and PPPoE headers, which I inserted in the tc program, will be properly included in each fragment generated by GSO/TSO.

I hope you are doing well. I am working with eBPF and tc on the egress side to add a PPPoE header to forwarded and locally generated packets. Due to GSO/TSO, I observe packets larger than the MTU size, and I see outputs like skb->gso_size = 1452, skb->gso_segs = 3, skb->len = 4410. My concern is whether the MAC and PPPoE headers, which I inserted in the tc program, will be properly included in each fragment generated by GSO/TSO.