net_sched: allow flushing tc police actions

The act_police uses its own code to walk the
action hashtable, which leads to that we could
not flush standalone tc police actions, so just
switch to tcf_generic_walker() like other actions.

(Joint work from Roman and Cong.)

Signed-off-by: Roman Mashak <mrv@mojatatu.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/sched/act_police.c b/net/sched/act_police.c
index 259352d978df613d5d3e2257b7fbe2c36f2e7ff8..8a3be1d99775b0589bcb09f97e7bf347a4017868 100644 (file)
--- a/net/sched/act_police.c
+++ b/net/sched/act_police.c
@@ -63,49 +63,8 @@ static int tcf_act_police_walker(struct net *net, struct sk_buff *skb,
                                 const struct tc_action_ops *ops)
 {
        struct tc_action_net *tn = net_generic(net, police_net_id);
-       struct tcf_hashinfo *hinfo = tn->hinfo;
-       int err = 0, index = -1, i = 0, s_i = 0, n_i = 0;
-       struct nlattr *nest;
-
-       spin_lock_bh(&hinfo->lock);
-
-       s_i = cb->args[0];
-
-       for (i = 0; i < (POL_TAB_MASK + 1); i++) {
-               struct hlist_head *head;
-               struct tc_action *p;
-
-               head = &hinfo->htab[tcf_hash(i, POL_TAB_MASK)];
-
-               hlist_for_each_entry_rcu(p, head, tcfa_head) {
-                       index++;
-                       if (index < s_i)
-                               continue;
-                       nest = nla_nest_start(skb, index);
-                       if (nest == NULL)
-                               goto nla_put_failure;
-                       if (type == RTM_DELACTION)
-                               err = tcf_action_dump_1(skb, p, 0, 1);
-                       else
-                               err = tcf_action_dump_1(skb, p, 0, 0);
-                       if (err < 0) {
-                               index--;
-                               nla_nest_cancel(skb, nest);
-                               goto done;
-                       }
-                       nla_nest_end(skb, nest);
-                       n_i++;
-               }
-       }
-done:
-       spin_unlock_bh(&hinfo->lock);
-       if (n_i)
-               cb->args[0] += n_i;
-       return n_i;
 
-nla_put_failure:
-       nla_nest_cancel(skb, nest);
-       goto done;
+       return tcf_generic_walker(tn, skb, cb, type, ops);
 }
 
 static const struct nla_policy police_policy[TCA_POLICE_MAX + 1] = {