Re: [PATCH bpf-next v2 1/4] bpf: sockmap: enable map_update_elem from bpf_iter

[Martin KaFai Lau]

On Mon, Sep 28, 2020 at 10:08:02AM +0100, Lorenz Bauer wrote:
> Allow passing a pointer to a BTF struct sock_common* when updating
> a sockmap or sockhash. Since BTF pointers can fault and therefore be
> NULL at runtime we need to add an additional !sk check to
> sock_map_update_elem. Since we may be passed a request or timewait
> socket we also need to check sk_fullsock. Doing this allows calling
> map_update_elem on sockmap from bpf_iter context, which uses
> BTF pointers.
Acked-by: Martin KaFai Lau <ka...@fb.com>