Tue, May 21, 2019 at 04:45:53PM CEST, step...@networkplumber.org wrote:
>On Tue, 21 May 2019 08:15:36 +0200
>Jiri Pirko <j...@resnulli.us> wrote:
>
>> + if (static_branch_unlikely(&generic_xdp_needed_key)) {
>> + int ret2;
>> +
>> + preempt_disable();
>> + rcu_read_lock();
>> + ret2 = do_xdp_generic(rcu_dereference(skb->dev->xdp_prog), skb);
>> + rcu_read_unlock();
>> + preempt_enable();
>> +
>> + if (ret2 != XDP_PASS)
>> + return NET_RX_DROP;
>> + }
>> +
>
>rcu_read_lock is already held by callers of __netif_receive_skb_core
Sure, the purpose of the draft was just to show the idea.
