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_connmark.c b/net/sched/act_connmark.c
index 35a5270..eae07a2 100644
--- a/net/sched/act_connmark.c
+++ b/net/sched/act_connmark.c
@@ -31,6 +31,7 @@
#define CONNMARK_TAB_MASK 3
static int connmark_net_id;
+static struct tc_action_ops act_connmark_ops;
static int tcf_connmark(struct sk_buff *skb, const struct tc_action *a,
struct tcf_result *res)
@@ -38,7 +39,7 @@
const struct nf_conntrack_tuple_hash *thash;
struct nf_conntrack_tuple tuple;
enum ip_conntrack_info ctinfo;
- struct tcf_connmark_info *ca = a->priv;
+ struct tcf_connmark_info *ca = to_connmark(a);
struct nf_conntrack_zone zone;
struct nf_conn *c;
int proto;
@@ -96,7 +97,7 @@
};
static int tcf_connmark_init(struct net *net, struct nlattr *nla,
- struct nlattr *est, struct tc_action *a,
+ struct nlattr *est, struct tc_action **a,
int ovr, int bind)
{
struct tc_action_net *tn = net_generic(net, connmark_net_id);
@@ -116,22 +117,22 @@
if (!tcf_hash_check(tn, parm->index, a, bind)) {
ret = tcf_hash_create(tn, parm->index, est, a,
- sizeof(*ci), bind, false);
+ &act_connmark_ops, bind, false);
if (ret)
return ret;
- ci = to_connmark(a);
+ ci = to_connmark(*a);
ci->tcf_action = parm->action;
ci->net = net;
ci->zone = parm->zone;
- tcf_hash_insert(tn, a);
+ tcf_hash_insert(tn, *a);
ret = ACT_P_CREATED;
} else {
- ci = to_connmark(a);
+ ci = to_connmark(*a);
if (bind)
return 0;
- tcf_hash_release(a, bind);
+ tcf_hash_release(*a, bind);
if (!ovr)
return -EEXIST;
/* replacing action and zone */
@@ -146,7 +147,7 @@
int bind, int ref)
{
unsigned char *b = skb_tail_pointer(skb);
- struct tcf_connmark_info *ci = a->priv;
+ struct tcf_connmark_info *ci = to_connmark(a);
struct tc_connmark opt = {
.index = ci->tcf_index,
@@ -173,14 +174,14 @@
static int tcf_connmark_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, connmark_net_id);
- return tcf_generic_walker(tn, skb, cb, type, a);
+ return tcf_generic_walker(tn, skb, cb, type, ops);
}
-static int tcf_connmark_search(struct net *net, struct tc_action *a, u32 index)
+static int tcf_connmark_search(struct net *net, struct tc_action **a, u32 index)
{
struct tc_action_net *tn = net_generic(net, connmark_net_id);
@@ -196,6 +197,7 @@
.init = tcf_connmark_init,
.walk = tcf_connmark_walker,
.lookup = tcf_connmark_search,
+ .size = sizeof(struct tcf_connmark_info),
};
static __net_init int connmark_init_net(struct net *net)
