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net_sched: switch to rcu_work

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Commit 05f0fe6b74 ("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>
This commit is contained in:
Cong Wang
2018-05-23 15:26:53 -07:00
committed by David S. Miller
parent 1bb58d2d3c
commit aaa908ffbe
13 changed files with 85 additions and 221 deletions
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24
net/sched/cls_basic.c
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@@ -35,10 +35,7 @@ struct basic_filter {
struct tcf_result res;
struct tcf_proto *tp;
struct list_head link;
union {
struct work_struct work;
struct rcu_head rcu;
};
struct rcu_work rwork;
};
static int basic_classify(struct sk_buff *skb, const struct tcf_proto *tp,
@@ -97,21 +94,14 @@ static void __basic_delete_filter(struct basic_filter *f)
static void basic_delete_filter_work(struct work_struct *work)
{
struct basic_filter *f = container_of(work, struct basic_filter, work);
struct basic_filter *f = container_of(to_rcu_work(work),
struct basic_filter,
rwork);
rtnl_lock();
__basic_delete_filter(f);
rtnl_unlock();
}
static void basic_delete_filter(struct rcu_head *head)
{
struct basic_filter *f = container_of(head, struct basic_filter, rcu);
INIT_WORK(&f->work, basic_delete_filter_work);
tcf_queue_work(&f->work);
}
static void basic_destroy(struct tcf_proto *tp, struct netlink_ext_ack *extack)
{
struct basic_head *head = rtnl_dereference(tp->root);
@@ -122,7 +112,7 @@ static void basic_destroy(struct tcf_proto *tp, struct netlink_ext_ack *extack)
tcf_unbind_filter(tp, &f->res);
idr_remove(&head->handle_idr, f->handle);
if (tcf_exts_get_net(&f->exts))
call_rcu(&f->rcu, basic_delete_filter);
tcf_queue_work(&f->rwork, basic_delete_filter_work);
else
__basic_delete_filter(f);
}
@@ -140,7 +130,7 @@ static int basic_delete(struct tcf_proto *tp, void *arg, bool *last,
tcf_unbind_filter(tp, &f->res);
idr_remove(&head->handle_idr, f->handle);
tcf_exts_get_net(&f->exts);
call_rcu(&f->rcu, basic_delete_filter);
tcf_queue_work(&f->rwork, basic_delete_filter_work);
*last = list_empty(&head->flist);
return 0;
}
@@ -234,7 +224,7 @@ static int basic_change(struct net *net, struct sk_buff *in_skb,
list_replace_rcu(&fold->link, &fnew->link);
tcf_unbind_filter(tp, &fold->res);
tcf_exts_get_net(&fold->exts);
call_rcu(&fold->rcu, basic_delete_filter);
tcf_queue_work(&fold->rwork, basic_delete_filter_work);
} else {
list_add_rcu(&fnew->link, &head->flist);
}