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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

45
net/sched/act_police.c
View File

@@ -37,8 +37,8 @@ struct tcf_police {
struct psched_ratecfg peak;
bool peak_present;
};
#define to_police(pc) \
container_of(pc->priv, struct tcf_police, common)
#define to_police(pc) ((struct tcf_police *)pc)
#define POL_TAB_MASK 15
@@ -56,15 +56,14 @@ struct tc_police_compat {
/* Each policer is serialized by its individual spinlock */
static int police_net_id;
static struct tc_action_ops act_police_ops;
static int tcf_act_police_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, police_net_id);
struct tcf_hashinfo *hinfo = tn->hinfo;
struct hlist_head *head;
struct tcf_common *p;
int err = 0, index = -1, i = 0, s_i = 0, n_i = 0;
struct nlattr *nest;
@@ -73,21 +72,22 @@ static int tcf_act_police_walker(struct net *net, struct sk_buff *skb,
s_i = cb->args[0];
for (i = 0; i < (POL_TAB_MASK + 1); i++) {
struct hlist_head *head;
struct tcf_common *p;
head = &hinfo->htab[tcf_hash(i, POL_TAB_MASK)];
hlist_for_each_entry_rcu(p, head, tcfc_head) {
index++;
if (index < s_i)
continue;
a->priv = p;
a->order = index;
nest = nla_nest_start(skb, a->order);
nest = nla_nest_start(skb, index);
if (nest == NULL)
goto nla_put_failure;
if (type == RTM_DELACTION)
err = tcf_action_dump_1(skb, a, 0, 1);
err = tcf_action_dump_1(skb, (struct tc_action *)p, 0, 1);
else
err = tcf_action_dump_1(skb, a, 0, 0);
err = tcf_action_dump_1(skb, (struct tc_action *)p, 0, 0);
if (err < 0) {
index--;
nla_nest_cancel(skb, nest);
@@ -116,7 +116,7 @@ static const struct nla_policy police_policy[TCA_POLICE_MAX + 1] = {
};
static int tcf_act_police_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)
{
int ret = 0, err;
@@ -142,13 +142,7 @@ static int tcf_act_police_init(struct net *net, struct nlattr *nla,
parm = nla_data(tb[TCA_POLICE_TBF]);
if (parm->index) {
if (tcf_hash_search(tn, a, parm->index)) {
police = to_police(a);
if (bind) {
police->tcf_bindcnt += 1;
police->tcf_refcnt += 1;
return 0;
}
if (tcf_hash_check(tn, parm->index, a, bind)) {
if (ovr)
goto override;
/* not replacing */
@@ -156,14 +150,14 @@ static int tcf_act_police_init(struct net *net, struct nlattr *nla,
}
} else {
ret = tcf_hash_create(tn, parm->index, NULL, a,
sizeof(*police), bind, false);
&act_police_ops, bind, false);
if (ret)
return ret;
ret = ACT_P_CREATED;
}
police = to_police(a);
override:
police = to_police(*a);
if (parm->rate.rate) {
err = -ENOMEM;
R_tab = qdisc_get_rtab(&parm->rate, tb[TCA_POLICE_RATE]);
@@ -235,7 +229,7 @@ override:
return ret;
police->tcfp_t_c = ktime_get_ns();
tcf_hash_insert(tn, a);
tcf_hash_insert(tn, *a);
return ret;
@@ -245,14 +239,14 @@ failure:
qdisc_put_rtab(P_tab);
qdisc_put_rtab(R_tab);
if (ret == ACT_P_CREATED)
tcf_hash_cleanup(a, est);
tcf_hash_cleanup(*a, est);
return err;
}
static int tcf_act_police(struct sk_buff *skb, const struct tc_action *a,
struct tcf_result *res)
{
struct tcf_police *police = a->priv;
struct tcf_police *police = to_police(a);
s64 now;
s64 toks;
s64 ptoks = 0;
@@ -311,7 +305,7 @@ static int
tcf_act_police_dump(struct sk_buff *skb, struct tc_action *a, int bind, int ref)
{
unsigned char *b = skb_tail_pointer(skb);
struct tcf_police *police = a->priv;
struct tcf_police *police = to_police(a);
struct tc_police opt = {
.index = police->tcf_index,
.action = police->tcf_action,
@@ -349,7 +343,7 @@ nla_put_failure:
return -1;
}
static int tcf_police_search(struct net *net, struct tc_action *a, u32 index)
static int tcf_police_search(struct net *net, struct tc_action **a, u32 index)
{
struct tc_action_net *tn = net_generic(net, police_net_id);
@@ -369,6 +363,7 @@ static struct tc_action_ops act_police_ops = {
.init = tcf_act_police_init,
.walk = tcf_act_police_walker,
.lookup = tcf_police_search,
.size = sizeof(struct tcf_police),
};
static __net_init int police_init_net(struct net *net)