On Fri, 25 Jul 2025 11:43:19 +0200 Jakub Sitnicki wrote: > > Taking about the next step, once skb metadata is preserved past the TC > > hook - here my impression from Netdev was that the least suprising thing > > to do will be to copy-on-clone or copy-on-write (if we can pull it off). > > Now that Martin has enlightened me [1] how things work today for skb > payload dynptr's, I will first try to follow the same approach, that is: > > Make a copy of skb metadata before the BPF program runs, if the program > may write to the metadata. 👍️ On the pskb_expand_head() behavior we should probably ask Daniel? I suspect it's just to "fail closed". But as you said we can follow up on that later, not a blocker in practice on Rx.
