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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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37
net/sched/cls_u32.c
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@@ -68,10 +68,7 @@ struct tc_u_knode {
u32 __percpu *pcpu_success;
#endif
struct tcf_proto *tp;
union {
struct work_struct work;
struct rcu_head rcu;
};
struct rcu_work rwork;
/* The 'sel' field MUST be the last field in structure to allow for
* tc_u32_keys allocated at end of structure.
*/
@@ -436,21 +433,14 @@ static int u32_destroy_key(struct tcf_proto *tp, struct tc_u_knode *n,
*/
static void u32_delete_key_work(struct work_struct *work)
{
struct tc_u_knode *key = container_of(work, struct tc_u_knode, work);
struct tc_u_knode *key = container_of(to_rcu_work(work),
struct tc_u_knode,
rwork);
rtnl_lock();
u32_destroy_key(key->tp, key, false);
rtnl_unlock();
}
static void u32_delete_key_rcu(struct rcu_head *rcu)
{
struct tc_u_knode *key = container_of(rcu, struct tc_u_knode, rcu);
INIT_WORK(&key->work, u32_delete_key_work);
tcf_queue_work(&key->work);
}
/* u32_delete_key_freepf_rcu is the rcu callback variant
* that free's the entire structure including the statistics
* percpu variables. Only use this if the key is not a copy
@@ -460,21 +450,14 @@ static void u32_delete_key_rcu(struct rcu_head *rcu)
*/
static void u32_delete_key_freepf_work(struct work_struct *work)
{
struct tc_u_knode *key = container_of(work, struct tc_u_knode, work);
struct tc_u_knode *key = container_of(to_rcu_work(work),
struct tc_u_knode,
rwork);
rtnl_lock();
u32_destroy_key(key->tp, key, true);
rtnl_unlock();
}
static void u32_delete_key_freepf_rcu(struct rcu_head *rcu)
{
struct tc_u_knode *key = container_of(rcu, struct tc_u_knode, rcu);
INIT_WORK(&key->work, u32_delete_key_freepf_work);
tcf_queue_work(&key->work);
}
static int u32_delete_key(struct tcf_proto *tp, struct tc_u_knode *key)
{
struct tc_u_knode __rcu **kp;
@@ -491,7 +474,7 @@ static int u32_delete_key(struct tcf_proto *tp, struct tc_u_knode *key)
tcf_unbind_filter(tp, &key->res);
idr_remove(&ht->handle_idr, key->handle);
tcf_exts_get_net(&key->exts);
call_rcu(&key->rcu, u32_delete_key_freepf_rcu);
tcf_queue_work(&key->rwork, u32_delete_key_freepf_work);
return 0;
}
}
@@ -611,7 +594,7 @@ static void u32_clear_hnode(struct tcf_proto *tp, struct tc_u_hnode *ht,
u32_remove_hw_knode(tp, n, extack);
idr_remove(&ht->handle_idr, n->handle);
if (tcf_exts_get_net(&n->exts))
call_rcu(&n->rcu, u32_delete_key_freepf_rcu);
tcf_queue_work(&n->rwork, u32_delete_key_freepf_work);
else
u32_destroy_key(n->tp, n, true);
}
@@ -995,7 +978,7 @@ static int u32_change(struct net *net, struct sk_buff *in_skb,
u32_replace_knode(tp, tp_c, new);
tcf_unbind_filter(tp, &n->res);
tcf_exts_get_net(&n->exts);
call_rcu(&n->rcu, u32_delete_key_rcu);
tcf_queue_work(&n->rwork, u32_delete_key_work);
return 0;
}