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net_sched: move tc_action into tcf_common

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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>
This commit is contained in:
WANG Cong
2016-07-25 16:09:41 -07:00
committed by David S. Miller
parent b93dd49c1a
commit a85a970af2
27 changed files with 298 additions and 329 deletions
Download Patch File Download Diff File Expand all files Collapse all files

26
net/sched/act_mirred.c
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@@ -52,9 +52,10 @@ static const struct nla_policy mirred_policy[TCA_MIRRED_MAX + 1] = {
};
static int mirred_net_id;
static struct tc_action_ops act_mirred_ops;
static int tcf_mirred_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, mirred_net_id);
@@ -84,14 +85,14 @@ static int tcf_mirred_init(struct net *net, struct nlattr *nla,
break;
default:
if (exists)
tcf_hash_release(a, bind);
tcf_hash_release(*a, bind);
return -EINVAL;
}
if (parm->ifindex) {
dev = __dev_get_by_index(net, parm->ifindex);
if (dev == NULL) {
if (exists)
tcf_hash_release(a, bind);
tcf_hash_release(*a, bind);
return -ENODEV;
}
switch (dev->type) {
@@ -115,16 +116,16 @@ static int tcf_mirred_init(struct net *net, struct nlattr *nla,
if (dev == NULL)
return -EINVAL;
ret = tcf_hash_create(tn, parm->index, est, a,
sizeof(*m), bind, true);
&act_mirred_ops, bind, true);
if (ret)
return ret;
ret = ACT_P_CREATED;
} else {
tcf_hash_release(a, bind);
tcf_hash_release(*a, bind);
if (!ovr)
return -EEXIST;
}
m = to_mirred(a);
m = to_mirred(*a);
ASSERT_RTNL();
m->tcf_action = parm->action;
@@ -142,7 +143,7 @@ static int tcf_mirred_init(struct net *net, struct nlattr *nla,
spin_lock_bh(&mirred_list_lock);
list_add(&m->tcfm_list, &mirred_list);
spin_unlock_bh(&mirred_list_lock);
tcf_hash_insert(tn, a);
tcf_hash_insert(tn, *a);
}
return ret;
@@ -151,7 +152,7 @@ static int tcf_mirred_init(struct net *net, struct nlattr *nla,
static int tcf_mirred(struct sk_buff *skb, const struct tc_action *a,
struct tcf_result *res)
{
struct tcf_mirred *m = a->priv;
struct tcf_mirred *m = to_mirred(a);
struct net_device *dev;
struct sk_buff *skb2;
int retval, err;
@@ -206,7 +207,7 @@ out:
static int tcf_mirred_dump(struct sk_buff *skb, struct tc_action *a, int bind, int ref)
{
unsigned char *b = skb_tail_pointer(skb);
struct tcf_mirred *m = a->priv;
struct tcf_mirred *m = to_mirred(a);
struct tc_mirred opt = {
.index = m->tcf_index,
.action = m->tcf_action,
@@ -232,14 +233,14 @@ nla_put_failure:
static int tcf_mirred_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, mirred_net_id);
return tcf_generic_walker(tn, skb, cb, type, a);
return tcf_generic_walker(tn, skb, cb, type, ops);
}
static int tcf_mirred_search(struct net *net, struct tc_action *a, u32 index)
static int tcf_mirred_search(struct net *net, struct tc_action **a, u32 index)
{
struct tc_action_net *tn = net_generic(net, mirred_net_id);
@@ -284,6 +285,7 @@ static struct tc_action_ops act_mirred_ops = {
.init = tcf_mirred_init,
.walk = tcf_mirred_walker,
.lookup = tcf_mirred_search,
.size = sizeof(struct tcf_mirred),
};
static __net_init int mirred_init_net(struct net *net)