net_sched: switch to rcu_work
Commit 05f0fe6b74db ("RCU, workqueue: Implement rcu_work") introduces
new API's for dispatching work in a RCU callback. Now we can just
switch to the new API's for tc filters. This could get rid of a lot
of code.
Cc: Tejun Heo <tj@kernel.org>
Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/sched/cls_fw.c b/net/sched/cls_fw.c
index 8b20772..29eeeaf 100644
--- a/net/sched/cls_fw.c
+++ b/net/sched/cls_fw.c
@@ -47,10 +47,7 @@ struct fw_filter {
#endif /* CONFIG_NET_CLS_IND */
struct tcf_exts exts;
struct tcf_proto *tp;
- union {
- struct work_struct work;
- struct rcu_head rcu;
- };
+ struct rcu_work rwork;
};
static u32 fw_hash(u32 handle)
@@ -134,21 +131,14 @@ static void __fw_delete_filter(struct fw_filter *f)
static void fw_delete_filter_work(struct work_struct *work)
{
- struct fw_filter *f = container_of(work, struct fw_filter, work);
-
+ struct fw_filter *f = container_of(to_rcu_work(work),
+ struct fw_filter,
+ rwork);
rtnl_lock();
__fw_delete_filter(f);
rtnl_unlock();
}
-static void fw_delete_filter(struct rcu_head *head)
-{
- struct fw_filter *f = container_of(head, struct fw_filter, rcu);
-
- INIT_WORK(&f->work, fw_delete_filter_work);
- tcf_queue_work(&f->work);
-}
-
static void fw_destroy(struct tcf_proto *tp, struct netlink_ext_ack *extack)
{
struct fw_head *head = rtnl_dereference(tp->root);
@@ -164,7 +154,7 @@ static void fw_destroy(struct tcf_proto *tp, struct netlink_ext_ack *extack)
rtnl_dereference(f->next));
tcf_unbind_filter(tp, &f->res);
if (tcf_exts_get_net(&f->exts))
- call_rcu(&f->rcu, fw_delete_filter);
+ tcf_queue_work(&f->rwork, fw_delete_filter_work);
else
__fw_delete_filter(f);
}
@@ -193,7 +183,7 @@ static int fw_delete(struct tcf_proto *tp, void *arg, bool *last,
RCU_INIT_POINTER(*fp, rtnl_dereference(f->next));
tcf_unbind_filter(tp, &f->res);
tcf_exts_get_net(&f->exts);
- call_rcu(&f->rcu, fw_delete_filter);
+ tcf_queue_work(&f->rwork, fw_delete_filter_work);
ret = 0;
break;
}
@@ -316,7 +306,7 @@ static int fw_change(struct net *net, struct sk_buff *in_skb,
rcu_assign_pointer(*fp, fnew);
tcf_unbind_filter(tp, &f->res);
tcf_exts_get_net(&f->exts);
- call_rcu(&f->rcu, fw_delete_filter);
+ tcf_queue_work(&f->rwork, fw_delete_filter_work);
*arg = fnew;
return err;