On Mon, Jul 12, 2021 at 12:56 PM John Fastabend
<john.fastabend@xxxxxxxxx> wrote:
>
> Proc socket stats use sk_prot->inuse_idx value to record inuse sock stats.
> We currently do not set this correctly from sockmap side. The result is
> reading sock stats '/proc/net/sockstat' gives incorrect values. The
> socket counter is incremented correctly, but because we don't set the
> counter correctly when we replace sk_prot we may omit the decrement.
>
> To get the correct inuse_idx value move the core_initcall that initializes
> the tcp/udp proto handlers to late_initcall. This way it is initialized
> after TCP/UDP has the chance to assign the inuse_idx value from the
> register protocol handler.
>
> Suggested-by: Jakub Sitnicki <jakub@xxxxxxxxxxxxxx>
> Fixes: 604326b41a6fb ("bpf, sockmap: convert to generic sk_msg interface")
> Signed-off-by: John Fastabend <john.fastabend@xxxxxxxxx>
For IPv6, I think the module is always loaded before we can
trigger tcp_bpf_check_v6_needs_rebuild(). So,
Reviewed-by: Cong Wang <cong.wang@xxxxxxxxxxxxx>
Thanks.
