Wed, May 17, 2017 at 12:17:11AM CEST, xiyou.wangc...@gmail.com wrote:
>On Tue, May 16, 2017 at 10:27 AM, Jiri Pirko <j...@resnulli.us> wrote:
>> +static struct tcf_proto *tcf_chain_tp_prev(struct tcf_chain_info
>> *chain_info)
>> +{
>> + return rtnl_dereference(*chain_info->pprev);
>> +}
>> +
>> +static void tcf_chain_tp_insert(struct tcf_chain *chain,
>> + struct tcf_chain_info *chain_info,
>> + struct tcf_proto *tp)
>> +{
>> + if (chain->p_filter_chain &&
>> + *chain_info->pprev == chain->filter_chain)
>> + *chain->p_filter_chain = tp;
>> + RCU_INIT_POINTER(tp->next, rtnl_dereference(*chain_info->pprev));
>
>Use tcf_chain_tp_prev()?
Ok. Will do that.
>
>
>> + rcu_assign_pointer(*chain_info->pprev, tp);
>> +}
>> +
>> +static void tcf_chain_tp_remove(struct tcf_chain *chain,
>> + struct tcf_chain_info *chain_info,
>> + struct tcf_proto *tp)
>> +{
>> + struct tcf_proto *next = rtnl_dereference(chain_info->next);
>> +
>> + if (chain->p_filter_chain && tp == chain->filter_chain)
>> + *chain->p_filter_chain = next;
>> + RCU_INIT_POINTER(*chain_info->pprev, next);
>> +}
>> +
>> +static struct tcf_proto *tcf_chain_tp_find(struct tcf_chain *chain,
>> + struct tcf_chain_info *chain_info,
>> + u32 protocol, u32 prio,
>> + bool prio_allocate)
>> +{
>> + struct tcf_proto **pprev;
>> + struct tcf_proto *tp;
>> +
>> + /* Check the chain for existence of proto-tcf with this priority */
>> + for (pprev = &chain->filter_chain;
>> + (tp = rtnl_dereference(*pprev)); pprev = &tp->next) {
>
>Use tcf_chain_tp_prev()?
Can't be done.
