net_sched: move tc_action into tcf_common
struct tc_action is confusing, currently we use it for two purposes:
1) Pass in arguments and carry out results from helper functions
2) A generic representation for tc actions
The first one is error-prone, since we need to make sure we don't
miss anything. This patch aims to get rid of this use, by moving
tc_action into tcf_common, so that they are allocated together
in hashtable and can be cast'ed easily.
And together with the following patch, we could really make
tc_action a generic representation for all tc actions and each
type of action can inherit from it.
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/act_csum.c b/net/sched/act_csum.c
index dcd9aba..b5dbf63 100644
--- a/net/sched/act_csum.c
+++ b/net/sched/act_csum.c
@@ -43,9 +43,10 @@
};
static int csum_net_id;
+static struct tc_action_ops act_csum_ops;
static int tcf_csum_init(struct net *net, struct nlattr *nla,
- struct nlattr *est, struct tc_action *a, int ovr,
+ struct nlattr *est, struct tc_action **a, int ovr,
int bind)
{
struct tc_action_net *tn = net_generic(net, csum_net_id);
@@ -67,26 +68,26 @@
if (!tcf_hash_check(tn, parm->index, a, bind)) {
ret = tcf_hash_create(tn, parm->index, est, a,
- sizeof(*p), bind, false);
+ &act_csum_ops, bind, false);
if (ret)
return ret;
ret = ACT_P_CREATED;
} else {
if (bind)/* dont override defaults */
return 0;
- tcf_hash_release(a, bind);
+ tcf_hash_release(*a, bind);
if (!ovr)
return -EEXIST;
}
- p = to_tcf_csum(a);
+ p = to_tcf_csum(*a);
spin_lock_bh(&p->tcf_lock);
p->tcf_action = parm->action;
p->update_flags = parm->update_flags;
spin_unlock_bh(&p->tcf_lock);
if (ret == ACT_P_CREATED)
- tcf_hash_insert(tn, a);
+ tcf_hash_insert(tn, *a);
return ret;
}
@@ -496,7 +497,7 @@
static int tcf_csum(struct sk_buff *skb,
const struct tc_action *a, struct tcf_result *res)
{
- struct tcf_csum *p = a->priv;
+ struct tcf_csum *p = to_tcf_csum(a);
int action;
u32 update_flags;
@@ -534,7 +535,7 @@
struct tc_action *a, int bind, int ref)
{
unsigned char *b = skb_tail_pointer(skb);
- struct tcf_csum *p = a->priv;
+ struct tcf_csum *p = to_tcf_csum(a);
struct tc_csum opt = {
.update_flags = p->update_flags,
.index = p->tcf_index,
@@ -560,14 +561,14 @@
static int tcf_csum_walker(struct net *net, struct sk_buff *skb,
struct netlink_callback *cb, int type,
- struct tc_action *a)
+ const struct tc_action_ops *ops)
{
struct tc_action_net *tn = net_generic(net, csum_net_id);
- return tcf_generic_walker(tn, skb, cb, type, a);
+ return tcf_generic_walker(tn, skb, cb, type, ops);
}
-static int tcf_csum_search(struct net *net, struct tc_action *a, u32 index)
+static int tcf_csum_search(struct net *net, struct tc_action **a, u32 index)
{
struct tc_action_net *tn = net_generic(net, csum_net_id);
@@ -583,6 +584,7 @@
.init = tcf_csum_init,
.walk = tcf_csum_walker,
.lookup = tcf_csum_search,
+ .size = sizeof(struct tcf_csum),
};
static __net_init int csum_init_net(struct net *net)