Release 4.11 net/sched/act_api.c
/*
* net/sched/act_api.c Packet action API.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*
* Author: Jamal Hadi Salim
*
*
*/
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/slab.h>
#include <linux/skbuff.h>
#include <linux/init.h>
#include <linux/kmod.h>
#include <linux/err.h>
#include <linux/module.h>
#include <net/net_namespace.h>
#include <net/sock.h>
#include <net/sch_generic.h>
#include <net/pkt_cls.h>
#include <net/act_api.h>
#include <net/netlink.h>
static void free_tcf(struct rcu_head *head)
{
struct tc_action *p = container_of(head, struct tc_action, tcfa_rcu);
free_percpu(p->cpu_bstats);
free_percpu(p->cpu_qstats);
if (p->act_cookie) {
kfree(p->act_cookie->data);
kfree(p->act_cookie);
}
kfree(p);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Eric Dumazet | 42 | 60.87% | 1 | 33.33% |
Jamal Hadi Salim | 24 | 34.78% | 1 | 33.33% |
Américo Wang | 3 | 4.35% | 1 | 33.33% |
Total | 69 | 100.00% | 3 | 100.00% |
static void tcf_hash_destroy(struct tcf_hashinfo *hinfo, struct tc_action *p)
{
spin_lock_bh(&hinfo->lock);
hlist_del(&p->tcfa_head);
spin_unlock_bh(&hinfo->lock);
gen_kill_estimator(&p->tcfa_rate_est);
/*
* gen_estimator est_timer() might access p->tcfa_lock
* or bstats, wait a RCU grace period before freeing p
*/
call_rcu(&p->tcfa_rcu, free_tcf);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
David S. Miller | 31 | 52.54% | 1 | 12.50% |
Américo Wang | 22 | 37.29% | 5 | 62.50% |
Eric Dumazet | 5 | 8.47% | 1 | 12.50% |
Alexei Starovoitov | 1 | 1.69% | 1 | 12.50% |
Total | 59 | 100.00% | 8 | 100.00% |
int __tcf_hash_release(struct tc_action *p, bool bind, bool strict)
{
int ret = 0;
if (p) {
if (bind)
p->tcfa_bindcnt--;
else if (strict && p->tcfa_bindcnt > 0)
return -EPERM;
p->tcfa_refcnt--;
if (p->tcfa_bindcnt <= 0 && p->tcfa_refcnt <= 0) {
if (p->ops->cleanup)
p->ops->cleanup(p, bind);
tcf_hash_destroy(p->hinfo, p);
ret = ACT_P_DELETED;
}
}
return ret;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
David S. Miller | 56 | 52.34% | 1 | 12.50% |
Américo Wang | 44 | 41.12% | 6 | 75.00% |
Daniel Borkmann | 7 | 6.54% | 1 | 12.50% |
Total | 107 | 100.00% | 8 | 100.00% |
EXPORT_SYMBOL(__tcf_hash_release);
static int tcf_dump_walker(struct tcf_hashinfo *hinfo, struct sk_buff *skb,
struct netlink_callback *cb)
{
int err = 0, index = -1, i = 0, s_i = 0, n_i = 0;
struct nlattr *nest;
spin_lock_bh(&hinfo->lock);
s_i = cb->args[0];
for (i = 0; i < (hinfo->hmask + 1); i++) {
struct hlist_head *head;
struct tc_action *p;
head = &hinfo->htab[tcf_hash(i, hinfo->hmask)];
hlist_for_each_entry_rcu(p, head, tcfa_head) {
index++;
if (index < s_i)
continue;
nest = nla_nest_start(skb, n_i);
if (nest == NULL)
goto nla_put_failure;
err = tcf_action_dump_1(skb, p, 0, 0);
if (err < 0) {
index--;
nlmsg_trim(skb, nest);
goto done;
}
nla_nest_end(skb, nest);
n_i++;
if (n_i >= TCA_ACT_MAX_PRIO)
goto done;
}
}
done:
spin_unlock_bh(&hinfo->lock);
if (n_i)
cb->args[0] += n_i;
return n_i;
nla_put_failure:
nla_nest_cancel(skb, nest);
goto done;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
David S. Miller | 184 | 76.03% | 1 | 8.33% |
Américo Wang | 33 | 13.64% | 6 | 50.00% |
Patrick McHardy | 20 | 8.26% | 2 | 16.67% |
Arnaldo Carvalho de Melo | 3 | 1.24% | 2 | 16.67% |
Jamal Hadi Salim | 2 | 0.83% | 1 | 8.33% |
Total | 242 | 100.00% | 12 | 100.00% |
static int tcf_del_walker(struct tcf_hashinfo *hinfo, struct sk_buff *skb,
const struct tc_action_ops *ops)
{
struct nlattr *nest;
int i = 0, n_i = 0;
int ret = -EINVAL;
nest = nla_nest_start(skb, 0);
if (nest == NULL)
goto nla_put_failure;
if (nla_put_string(skb, TCA_KIND, ops->kind))
goto nla_put_failure;
for (i = 0; i < (hinfo->hmask + 1); i++) {
struct hlist_head *head;
struct hlist_node *n;
struct tc_action *p;
head = &hinfo->htab[tcf_hash(i, hinfo->hmask)];
hlist_for_each_entry_safe(p, n, head, tcfa_head) {
ret = __tcf_hash_release(p, false, true);
if (ret == ACT_P_DELETED) {
module_put(p->ops->owner);
n_i++;
} else if (ret < 0)
goto nla_put_failure;
}
}
if (nla_put_u32(skb, TCA_FCNT, n_i))
goto nla_put_failure;
nla_nest_end(skb, nest);
return n_i;
nla_put_failure:
nla_nest_cancel(skb, nest);
return ret;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
David S. Miller | 126 | 57.80% | 2 | 15.38% |
Américo Wang | 65 | 29.82% | 6 | 46.15% |
Patrick McHardy | 19 | 8.72% | 2 | 15.38% |
Daniel Borkmann | 4 | 1.83% | 1 | 7.69% |
Jamal Hadi Salim | 2 | 0.92% | 1 | 7.69% |
Arnaldo Carvalho de Melo | 2 | 0.92% | 1 | 7.69% |
Total | 218 | 100.00% | 13 | 100.00% |
int tcf_generic_walker(struct tc_action_net *tn, struct sk_buff *skb,
struct netlink_callback *cb, int type,
const struct tc_action_ops *ops)
{
struct tcf_hashinfo *hinfo = tn->hinfo;
if (type == RTM_DELACTION) {
return tcf_del_walker(hinfo, skb, ops);
} else if (type == RTM_GETACTION) {
return tcf_dump_walker(hinfo, skb, cb);
} else {
WARN(1, "tcf_generic_walker: unknown action %d\n", type);
return -EINVAL;
}
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
David S. Miller | 66 | 72.53% | 1 | 25.00% |
Américo Wang | 22 | 24.18% | 2 | 50.00% |
Stephen Hemminger | 3 | 3.30% | 1 | 25.00% |
Total | 91 | 100.00% | 4 | 100.00% |
EXPORT_SYMBOL(tcf_generic_walker);
static struct tc_action *tcf_hash_lookup(u32 index, struct tcf_hashinfo *hinfo)
{
struct tc_action *p = NULL;
struct hlist_head *head;
spin_lock_bh(&hinfo->lock);
head = &hinfo->htab[tcf_hash(index, hinfo->hmask)];
hlist_for_each_entry_rcu(p, head, tcfa_head)
if (p->tcfa_index == index)
break;
spin_unlock_bh(&hinfo->lock);
return p;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
David S. Miller | 55 | 67.90% | 1 | 20.00% |
Américo Wang | 26 | 32.10% | 4 | 80.00% |
Total | 81 | 100.00% | 5 | 100.00% |
u32 tcf_hash_new_index(struct tc_action_net *tn)
{
struct tcf_hashinfo *hinfo = tn->hinfo;
u32 val = hinfo->index;
do {
if (++val == 0)
val = 1;
} while (tcf_hash_lookup(val, hinfo));
hinfo->index = val;
return val;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
David S. Miller | 39 | 66.10% | 1 | 25.00% |
Américo Wang | 17 | 28.81% | 2 | 50.00% |
Yang Yingliang | 3 | 5.08% | 1 | 25.00% |
Total | 59 | 100.00% | 4 | 100.00% |
EXPORT_SYMBOL(tcf_hash_new_index);
int tcf_hash_search(struct tc_action_net *tn, struct tc_action **a, u32 index)
{
struct tcf_hashinfo *hinfo = tn->hinfo;
struct tc_action *p = tcf_hash_lookup(index, hinfo);
if (p) {
*a = p;
return 1;
}
return 0;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
David S. Miller | 47 | 82.46% | 1 | 25.00% |
Américo Wang | 10 | 17.54% | 3 | 75.00% |
Total | 57 | 100.00% | 4 | 100.00% |
EXPORT_SYMBOL(tcf_hash_search);
bool tcf_hash_check(struct tc_action_net *tn, u32 index, struct tc_action **a,
int bind)
{
struct tcf_hashinfo *hinfo = tn->hinfo;
struct tc_action *p = NULL;
if (index && (p = tcf_hash_lookup(index, hinfo)) != NULL) {
if (bind)
p->tcfa_bindcnt++;
p->tcfa_refcnt++;
*a = p;
return true;
}
return false;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
David S. Miller | 59 | 71.95% | 1 | 14.29% |
Américo Wang | 23 | 28.05% | 6 | 85.71% |
Total | 82 | 100.00% | 7 | 100.00% |
EXPORT_SYMBOL(tcf_hash_check);
void tcf_hash_cleanup(struct tc_action *a, struct nlattr *est)
{
if (est)
gen_kill_estimator(&a->tcfa_rate_est);
call_rcu(&a->tcfa_rcu, free_tcf);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Américo Wang | 32 | 86.49% | 2 | 66.67% |
Eric Dumazet | 5 | 13.51% | 1 | 33.33% |
Total | 37 | 100.00% | 3 | 100.00% |
EXPORT_SYMBOL(tcf_hash_cleanup);
int tcf_hash_create(struct tc_action_net *tn, u32 index, struct nlattr *est,
struct tc_action **a, const struct tc_action_ops *ops,
int bind, bool cpustats)
{
struct tc_action *p = kzalloc(ops->size, GFP_KERNEL);
struct tcf_hashinfo *hinfo = tn->hinfo;
int err = -ENOMEM;
if (unlikely(!p))
return -ENOMEM;
p->tcfa_refcnt = 1;
if (bind)
p->tcfa_bindcnt = 1;
if (cpustats) {
p->cpu_bstats = netdev_alloc_pcpu_stats(struct gnet_stats_basic_cpu);
if (!p->cpu_bstats) {
err1:
kfree(p);
return err;
}
p->cpu_qstats = alloc_percpu(struct gnet_stats_queue);
if (!p->cpu_qstats) {
err2:
free_percpu(p->cpu_bstats);
goto err1;
}
}
spin_lock_init(&p->tcfa_lock);
INIT_HLIST_NODE(&p->tcfa_head);
p->tcfa_index = index ? index : tcf_hash_new_index(tn);
p->tcfa_tm.install = jiffies;
p->tcfa_tm.lastuse = jiffies;
p->tcfa_tm.firstuse = 0;
if (est) {
err = gen_new_estimator(&p->tcfa_bstats, p->cpu_bstats,
&p->tcfa_rate_est,
&p->tcfa_lock, NULL, est);
if (err) {
free_percpu(p->cpu_qstats);
goto err2;
}
}
p->hinfo = hinfo;
p->ops = ops;
INIT_LIST_HEAD(&p->list);
*a = p;
return 0;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
David S. Miller | 109 | 37.59% | 1 | 6.67% |
Eric Dumazet | 88 | 30.34% | 2 | 13.33% |
Américo Wang | 67 | 23.10% | 6 | 40.00% |
Stephen Hemminger | 14 | 4.83% | 1 | 6.67% |
Jamal Hadi Salim | 9 | 3.10% | 2 | 13.33% |
Patrick McHardy | 2 | 0.69% | 2 | 13.33% |
John Fastabend | 1 | 0.34% | 1 | 6.67% |
Total | 290 | 100.00% | 15 | 100.00% |
EXPORT_SYMBOL(tcf_hash_create);
void tcf_hash_insert(struct tc_action_net *tn, struct tc_action *a)
{
struct tcf_hashinfo *hinfo = tn->hinfo;
unsigned int h = tcf_hash(a->tcfa_index, hinfo->hmask);
spin_lock_bh(&hinfo->lock);
hlist_add_head(&a->tcfa_head, &hinfo->htab[h]);
spin_unlock_bh(&hinfo->lock);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
David S. Miller | 40 | 56.34% | 1 | 14.29% |
Américo Wang | 30 | 42.25% | 5 | 71.43% |
Jamal Hadi Salim | 1 | 1.41% | 1 | 14.29% |
Total | 71 | 100.00% | 7 | 100.00% |
EXPORT_SYMBOL(tcf_hash_insert);
void tcf_hashinfo_destroy(const struct tc_action_ops *ops,
struct tcf_hashinfo *hinfo)
{
int i;
for (i = 0; i < hinfo->hmask + 1; i++) {
struct tc_action *p;
struct hlist_node *n;
hlist_for_each_entry_safe(p, n, &hinfo->htab[i], tcfa_head) {
int ret;
ret = __tcf_hash_release(p, false, true);
if (ret == ACT_P_DELETED)
module_put(ops->owner);
else if (ret < 0)
return;
}
}
kfree(hinfo->htab);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Américo Wang | 102 | 100.00% | 4 | 100.00% |
Total | 102 | 100.00% | 4 | 100.00% |
EXPORT_SYMBOL(tcf_hashinfo_destroy);
static LIST_HEAD(act_base);
static DEFINE_RWLOCK(act_mod_lock);
int tcf_register_action(struct tc_action_ops *act,
struct pernet_operations *ops)
{
struct tc_action_ops *a;
int ret;
if (!act->act || !act->dump || !act->init || !act->walk || !act->lookup)
return -EINVAL;
/* We have to register pernet ops before making the action ops visible,
* otherwise tcf_action_init_1() could get a partially initialized
* netns.
*/
ret = register_pernet_subsys(ops);
if (ret)
return ret;
write_lock(&act_mod_lock);
list_for_each_entry(a, &act_base, head) {
if (act->type == a->type || (strcmp(act->kind, a->kind) == 0)) {
write_unlock(&act_mod_lock);
unregister_pernet_subsys(ops);
return -EEXIST;
}
}
list_add_tail(&act->head, &act_base);
write_unlock(&act_mod_lock);
return 0;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Jamal Hadi Salim | 92 | 62.59% | 4 | 50.00% |
Américo Wang | 55 | 37.41% | 4 | 50.00% |
Total | 147 | 100.00% | 8 | 100.00% |
EXPORT_SYMBOL(tcf_register_action);
int tcf_unregister_action(struct tc_action_ops *act,
struct pernet_operations *ops)
{
struct tc_action_ops *a;
int err = -ENOENT;
write_lock(&act_mod_lock);
list_for_each_entry(a, &act_base, head) {
if (a == act) {
list_del(&act->head);
err = 0;
break;
}
}
write_unlock(&act_mod_lock);
if (!err)
unregister_pernet_subsys(ops);
return err;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Jamal Hadi Salim | 50 | 60.98% | 1 | 20.00% |
Américo Wang | 29 | 35.37% | 3 | 60.00% |
Eric Dumazet | 3 | 3.66% | 1 | 20.00% |
Total | 82 | 100.00% | 5 | 100.00% |
EXPORT_SYMBOL(tcf_unregister_action);
/* lookup by name */
static struct tc_action_ops *tc_lookup_action_n(char *kind)
{
struct tc_action_ops *a, *res = NULL;
if (kind) {
read_lock(&act_mod_lock);
list_for_each_entry(a, &act_base, head) {
if (strcmp(kind, a->kind) == 0) {
if (try_module_get(a->owner))
res = a;
break;
}
}
read_unlock(&act_mod_lock);
}
return res;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Jamal Hadi Salim | 66 | 80.49% | 2 | 40.00% |
Américo Wang | 8 | 9.76% | 1 | 20.00% |
Eric Dumazet | 7 | 8.54% | 1 | 20.00% |
Patrick McHardy | 1 | 1.22% | 1 | 20.00% |
Total | 82 | 100.00% | 5 | 100.00% |
/* lookup by nlattr */
static struct tc_action_ops *tc_lookup_action(struct nlattr *kind)
{
struct tc_action_ops *a, *res = NULL;
if (kind) {
read_lock(&act_mod_lock);
list_for_each_entry(a, &act_base, head) {
if (nla_strcmp(kind, a->kind) == 0) {
if (try_module_get(a->owner))
res = a;
break;
}
}
read_unlock(&act_mod_lock);
}
return res;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Jamal Hadi Salim | 65 | 78.31% | 2 | 33.33% |
Américo Wang | 8 | 9.64% | 1 | 16.67% |
Eric Dumazet | 7 | 8.43% | 1 | 16.67% |
Patrick McHardy | 3 | 3.61% | 2 | 33.33% |
Total | 83 | 100.00% | 6 | 100.00% |
int tcf_action_exec(struct sk_buff *skb, struct tc_action **actions,
int nr_actions, struct tcf_result *res)
{
int ret = -1, i;
if (skb_skip_tc_classify(skb))
return TC_ACT_OK;
for (i = 0; i < nr_actions; i++) {
const struct tc_action *a = actions[i];
repeat:
ret = a->ops->act(skb, a, res);
if (ret == TC_ACT_REPEAT)
goto repeat; /* we need a ttl - JHS */
if (ret != TC_ACT_PIPE)
break;
}
return ret;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Jamal Hadi Salim | 61 | 58.10% | 2 | 28.57% |
Américo Wang | 32 | 30.48% | 2 | 28.57% |
Willem de Bruijn | 5 | 4.76% | 1 | 14.29% |
David S. Miller | 5 | 4.76% | 1 | 14.29% |
Patrick McHardy | 2 | 1.90% | 1 | 14.29% |
Total | 105 | 100.00% | 7 | 100.00% |
EXPORT_SYMBOL(tcf_action_exec);
int tcf_action_destroy(struct list_head *actions, int bind)
{
struct tc_action *a, *tmp;
int ret = 0;
list_for_each_entry_safe(a, tmp, actions, list) {
ret = __tcf_hash_release(a, bind, true);
if (ret == ACT_P_DELETED)
module_put(a->ops->owner);
else if (ret < 0)
return ret;
}
return ret;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Américo Wang | 40 | 51.95% | 2 | 33.33% |
Jamal Hadi Salim | 32 | 41.56% | 2 | 33.33% |
Daniel Borkmann | 3 | 3.90% | 1 | 16.67% |
Patrick McHardy | 2 | 2.60% | 1 | 16.67% |
Total | 77 | 100.00% | 6 | 100.00% |
int
tcf_action_dump_old(struct sk_buff *skb, struct tc_action *a, int bind, int ref)
{
return a->ops->dump(skb, a, bind, ref);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Jamal Hadi Salim | 37 | 100.00% | 1 | 100.00% |
Total | 37 | 100.00% | 1 | 100.00% |
int
tcf_action_dump_1(struct sk_buff *skb, struct tc_action *a, int bind, int ref)
{
int err = -EINVAL;
unsigned char *b = skb_tail_pointer(skb);
struct nlattr *nest;
if (nla_put_string(skb, TCA_KIND, a->ops->kind))
goto nla_put_failure;
if (tcf_action_copy_stats(skb, a, 0))
goto nla_put_failure;
if (a->act_cookie) {
if (nla_put(skb, TCA_ACT_COOKIE, a->act_cookie->len,
a->act_cookie->data))
goto nla_put_failure;
}
nest = nla_nest_start(skb, TCA_OPTIONS);
if (nest == NULL)
goto nla_put_failure;
err = tcf_action_dump_old(skb, a, bind, ref);
if (err > 0) {
nla_nest_end(skb, nest);
return err;
}
nla_put_failure:
nlmsg_trim(skb, b);
return -1;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Jamal Hadi Salim | 135 | 80.36% | 2 | 22.22% |
Patrick McHardy | 16 | 9.52% | 2 | 22.22% |
Arnaldo Carvalho de Melo | 6 | 3.57% | 2 | 22.22% |
David S. Miller | 5 | 2.98% | 1 | 11.11% |
Eric Dumazet | 4 | 2.38% | 1 | 11.11% |
Thomas Graf | 2 | 1.19% | 1 | 11.11% |
Total | 168 | 100.00% | 9 | 100.00% |
EXPORT_SYMBOL(tcf_action_dump_1);
int tcf_action_dump(struct sk_buff *skb, struct list_head *actions,
int bind, int ref)
{
struct tc_action *a;
int err = -EINVAL;
struct nlattr *nest;
list_for_each_entry(a, actions, list) {
nest = nla_nest_start(skb, a->order);
if (nest == NULL)
goto nla_put_failure;
err = tcf_action_dump_1(skb, a, bind, ref);
if (err < 0)
goto errout;
nla_nest_end(skb, nest);
}
return 0;
nla_put_failure:
err = -EINVAL;
errout:
nla_nest_cancel(skb, nest);
return err;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Jamal Hadi Salim | 76 | 64.41% | 2 | 25.00% |
Patrick McHardy | 22 | 18.64% | 3 | 37.50% |
Américo Wang | 10 | 8.47% | 1 | 12.50% |
Thomas Graf | 8 | 6.78% | 1 | 12.50% |
Arnaldo Carvalho de Melo | 2 | 1.69% | 1 | 12.50% |
Total | 118 | 100.00% | 8 | 100.00% |
static struct tc_cookie *nla_memdup_cookie(struct nlattr **tb)
{
struct tc_cookie *c = kzalloc(sizeof(*c), GFP_KERNEL);
if (!c)
return NULL;
c->data = nla_memdup(tb[TCA_ACT_COOKIE], GFP_KERNEL);
if (!c->data) {
kfree(c);
return NULL;
}
c->len = nla_len(tb[TCA_ACT_COOKIE]);
return c;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Jamal Hadi Salim | 65 | 77.38% | 1 | 33.33% |
Wolfgang Bumiller | 18 | 21.43% | 1 | 33.33% |
Wei Yongjun | 1 | 1.19% | 1 | 33.33% |
Total | 84 | 100.00% | 3 | 100.00% |
struct tc_action *tcf_action_init_1(struct net *net, struct nlattr *nla,
struct nlattr *est, char *name, int ovr,
int bind)
{
struct tc_action *a;
struct tc_action_ops *a_o;
struct tc_cookie *cookie = NULL;
char act_name[IFNAMSIZ];
struct nlattr *tb[TCA_ACT_MAX + 1];
struct nlattr *kind;
int err;
if (name == NULL) {
err = nla_parse_nested(tb, TCA_ACT_MAX, nla, NULL);
if (err < 0)
goto err_out;
err = -EINVAL;
kind = tb[TCA_ACT_KIND];
if (kind == NULL)
goto err_out;
if (nla_strlcpy(act_name, kind, IFNAMSIZ) >= IFNAMSIZ)
goto err_out;
if (tb[TCA_ACT_COOKIE]) {
int cklen = nla_len(tb[TCA_ACT_COOKIE]);
if (cklen > TC_COOKIE_MAX_SIZE)
goto err_out;
cookie = nla_memdup_cookie(tb);
if (!cookie) {
err = -ENOMEM;
goto err_out;
}
}
} else {
err = -EINVAL;
if (strlcpy(act_name, name, IFNAMSIZ) >= IFNAMSIZ)
goto err_out;
}
a_o = tc_lookup_action_n(act_name);
if (a_o == NULL) {
#ifdef CONFIG_MODULES
rtnl_unlock();
request_module("act_%s", act_name);
rtnl_lock();
a_o = tc_lookup_action_n(act_name);
/* We dropped the RTNL semaphore in order to
* perform the module load. So, even if we
* succeeded in loading the module we have to
* tell the caller to replay the request. We
* indicate this using -EAGAIN.
*/
if (a_o != NULL) {
err = -EAGAIN;
goto err_mod;
}
#endif
err = -ENOENT;
goto err_out;
}
/* backward compatibility for policer */
if (name == NULL)
err = a_o->init(net, tb[TCA_ACT_OPTIONS], est, &a, ovr, bind);
else
err = a_o->