Re: [RFC nf-next v2 1/2] netfilter: bpf: support prog update

Florian Westphal
2023-12-19T14:58:18Z

D. Wythe <alibuda@linux.alibaba.com> wrote:
> net/netfilter/nf_bpf_link.c:31:22: note: in expansion of macro
> ‘rcu_dereference’
>    31 |  return bpf_prog_run(rcu_dereference((const struct bpf_prog __rcu
> *)nf_link->link.prog), &ctx);
>       |                      ^~~~~~~~~~~~~~~
>
> So, I think we might need to go back to version 1.
>
> @ Florian , what do you think ?

Use rcu_dereference_raw().