Release 4.14 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 int tcf_action_goto_chain_init(struct tc_action *a, struct tcf_proto *tp)
{
	u32 chain_index = a->tcfa_action & TC_ACT_EXT_VAL_MASK;

	if (!tp)
		return -EINVAL;
	a->goto_chain = tcf_chain_get(tp->chain->block, chain_index, true);
	if (!a->goto_chain)
		return -ENOMEM;
	return 0;
}

Contributors
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CommitProp
Jiri Pirko
63
96.92%
1
50.00%
Américo Wang
2
3.08%
1
50.00%
Total
65
100.00%
2
100.00%



static void tcf_action_goto_chain_fini(struct tc_action *a)
{
	tcf_chain_put(a->goto_chain);
}

Contributors
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Jiri Pirko
18
100.00%
1
100.00%
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18
100.00%
1
100.00%



static void tcf_action_goto_chain_exec(const struct tc_action *a,
				       struct tcf_result *res)
{
	const struct tcf_chain *chain = a->goto_chain;

	res->goto_tp = rcu_dereference_bh(chain->filter_chain);
}

Contributors
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Jiri Pirko
38
100.00%
1
100.00%
Total
38
100.00%
1
100.00%

/* XXX: For standalone actions, we don't need a RCU grace period either, because
 * actions are always connected to filters and filters are already destroyed in
 * RCU callbacks, so after a RCU grace period actions are already disconnected
 * from filters. Readers later can not find us.
 */


static void free_tcf(struct tc_action *p)
{
	free_percpu(p->cpu_bstats);
	free_percpu(p->cpu_qstats);

	if (p->act_cookie) {
		kfree(p->act_cookie->data);
		kfree(p->act_cookie);
	}
	if (p->goto_chain)
		tcf_action_goto_chain_fini(p);

	kfree(p);
}

Contributors
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CommitProp
Eric Dumazet
27
41.54%
1
20.00%
Jamal Hadi Salim
24
36.92%
1
20.00%
Jiri Pirko
11
16.92%
1
20.00%
Américo Wang
3
4.62%
2
40.00%
Total
65
100.00%
5
100.00%



static void tcf_idr_remove(struct tcf_idrinfo *idrinfo, struct tc_action *p)
{
	spin_lock_bh(&idrinfo->lock);
	idr_remove_ext(&idrinfo->action_idr, p->tcfa_index);
	spin_unlock_bh(&idrinfo->lock);
	gen_kill_estimator(&p->tcfa_rate_est);
	free_tcf(p);
}

Contributors
Person
Tokens
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Commits
CommitProp
David S. Miller
28
49.12%
1
11.11%
Américo Wang
17
29.82%
6
66.67%
Chris Mi
11
19.30%
1
11.11%
Alexei Starovoitov
1
1.75%
1
11.11%
Total
57
100.00%
9
100.00%



int __tcf_idr_release(struct tc_action *p, bool bind, bool strict)
{
	int ret = 0;

	ASSERT_RTNL();

	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_idr_remove(p->idrinfo, p);
			ret = ACT_P_DELETED;
		}
	}

	return ret;
}
Contributors
Person
Tokens
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Commits
CommitProp
David S. Miller
55
50.00%
1
10.00%
Américo Wang
46
41.82%
7
70.00%
Daniel Borkmann
6
5.45%
1
10.00%
Chris Mi
3
2.73%
1
10.00%
Total
110
100.00%
10
100.00%


EXPORT_SYMBOL(__tcf_idr_release);



static int tcf_dump_walker(struct tcf_idrinfo *idrinfo, struct sk_buff *skb,
			   struct netlink_callback *cb)
{
	int err = 0, index = -1, s_i = 0, n_i = 0;
	u32 act_flags = cb->args[2];
	unsigned long jiffy_since = cb->args[3];
	struct nlattr *nest;
	struct idr *idr = &idrinfo->action_idr;
	struct tc_action *p;
	unsigned long id = 1;

	spin_lock_bh(&idrinfo->lock);

	s_i = cb->args[0];

	idr_for_each_entry_ext(idr, p, id) {
		index++;
		if (index < s_i)
			continue;

		if (jiffy_since &&
		    time_after(jiffy_since,
			       (unsigned long)p->tcfa_tm.lastuse))
			continue;

		nest = nla_nest_start(skb, n_i);
		if (!nest)
			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 (!(act_flags & TCA_FLAG_LARGE_DUMP_ON) &&
		    n_i >= TCA_ACT_MAX_PRIO)
			goto done;
	}
done:
	if (index >= 0)
		cb->args[0] = index + 1;

	spin_unlock_bh(&idrinfo->lock);
	if (n_i) {
		if (act_flags & TCA_FLAG_LARGE_DUMP_ON)
			cb->args[1] = n_i;
	}
	return n_i;

nla_put_failure:
	nla_nest_cancel(skb, nest);
	goto done;
}

Contributors
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CommitProp
David S. Miller
137
48.41%
1
7.69%
Jamal Hadi Salim
82
28.98%
2
15.38%
Chris Mi
29
10.25%
1
7.69%
Patrick McHardy
18
6.36%
2
15.38%
Américo Wang
14
4.95%
5
38.46%
Arnaldo Carvalho de Melo
3
1.06%
2
15.38%
Total
283
100.00%
13
100.00%



static int tcf_del_walker(struct tcf_idrinfo *idrinfo, struct sk_buff *skb,
			  const struct tc_action_ops *ops)
{
	struct nlattr *nest;
	int n_i = 0;
	int ret = -EINVAL;
	struct idr *idr = &idrinfo->action_idr;
	struct tc_action *p;
	unsigned long id = 1;

	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;

	idr_for_each_entry_ext(idr, p, id) {
		ret = __tcf_idr_release(p, false, true);
		if (ret == ACT_P_DELETED) {
			module_put(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
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Commits
CommitProp
David S. Miller
88
48.89%
2
15.38%
Américo Wang
38
21.11%
5
38.46%
Chris Mi
28
15.56%
1
7.69%
Patrick McHardy
19
10.56%
2
15.38%
Daniel Borkmann
3
1.67%
1
7.69%
Jamal Hadi Salim
2
1.11%
1
7.69%
Arnaldo Carvalho de Melo
2
1.11%
1
7.69%
Total
180
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_idrinfo *idrinfo = tn->idrinfo;

	if (type == RTM_DELACTION) {
		return tcf_del_walker(idrinfo, skb, ops);
	} else if (type == RTM_GETACTION) {
		return tcf_dump_walker(idrinfo, skb, cb);
	} else {
		WARN(1, "tcf_generic_walker: unknown action %d\n", type);
		return -EINVAL;
	}
}
Contributors
Person
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Prop
Commits
CommitProp
David S. Miller
66
72.53%
1
20.00%
Américo Wang
17
18.68%
2
40.00%
Chris Mi
5
5.49%
1
20.00%
Stephen Hemminger
3
3.30%
1
20.00%
Total
91
100.00%
5
100.00%


EXPORT_SYMBOL(tcf_generic_walker);



static struct tc_action *tcf_idr_lookup(u32 index, struct tcf_idrinfo *idrinfo)
{
	struct tc_action *p = NULL;

	spin_lock_bh(&idrinfo->lock);
	p = idr_find_ext(&idrinfo->action_idr, index);
	spin_unlock_bh(&idrinfo->lock);

	return p;
}

Contributors
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CommitProp
David S. Miller
32
59.26%
1
16.67%
Américo Wang
11
20.37%
4
66.67%
Chris Mi
11
20.37%
1
16.67%
Total
54
100.00%
6
100.00%



int tcf_idr_search(struct tc_action_net *tn, struct tc_action **a, u32 index)
{
	struct tcf_idrinfo *idrinfo = tn->idrinfo;
	struct tc_action *p = tcf_idr_lookup(index, idrinfo);

	if (p) {
		*a = p;
		return 1;
	}
	return 0;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
David S. Miller
41
71.93%
1
20.00%
Américo Wang
10
17.54%
3
60.00%
Chris Mi
6
10.53%
1
20.00%
Total
57
100.00%
5
100.00%


EXPORT_SYMBOL(tcf_idr_search);



bool tcf_idr_check(struct tc_action_net *tn, u32 index, struct tc_action **a,
		   int bind)
{
	struct tcf_idrinfo *idrinfo = tn->idrinfo;
	struct tc_action *p = tcf_idr_lookup(index, idrinfo);

	if (index && p) {
		if (bind)
			p->tcfa_bindcnt++;
		p->tcfa_refcnt++;
		*a = p;
		return true;
	}
	return false;
}
Contributors
Person
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CommitProp
David S. Miller
44
57.89%
1
12.50%
Américo Wang
22
28.95%
6
75.00%
Chris Mi
10
13.16%
1
12.50%
Total
76
100.00%
8
100.00%


EXPORT_SYMBOL(tcf_idr_check);



void tcf_idr_cleanup(struct tc_action *a, struct nlattr *est)
{
	if (est)
		gen_kill_estimator(&a->tcfa_rate_est);
	free_tcf(a);
}
Contributors
Person
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CommitProp
Américo Wang
31
96.88%
3
75.00%
Chris Mi
1
3.12%
1
25.00%
Total
32
100.00%
4
100.00%


EXPORT_SYMBOL(tcf_idr_cleanup);



int tcf_idr_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_idrinfo *idrinfo = tn->idrinfo;
	struct idr *idr = &idrinfo->action_idr;
	int err = -ENOMEM;
	unsigned long idr_index;

	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);
	/* user doesn't specify an index */
	if (!index) {
		idr_preload(GFP_KERNEL);
		spin_lock_bh(&idrinfo->lock);
		err = idr_alloc_ext(idr, NULL, &idr_index, 1, 0,
				    GFP_ATOMIC);
		spin_unlock_bh(&idrinfo->lock);
		idr_preload_end();
		if (err) {
err3:
			free_percpu(p->cpu_qstats);
			goto err2;
		}
		p->tcfa_index = idr_index;
	} else {
		idr_preload(GFP_KERNEL);
		spin_lock_bh(&idrinfo->lock);
		err = idr_alloc_ext(idr, NULL, NULL, index, index + 1,
				    GFP_ATOMIC);
		spin_unlock_bh(&idrinfo->lock);
		idr_preload_end();
		if (err)
			goto err3;
		p->tcfa_index = index;
	}

	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) {
			goto err3;
		}
	}

	p->idrinfo = idrinfo;
	p->ops = ops;
	INIT_LIST_HEAD(&p->list);
	*a = p;
	return 0;
}
Contributors
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CommitProp
Chris Mi
121
29.58%
1
5.88%
David S. Miller
103
25.18%
1
5.88%
Eric Dumazet
84
20.54%
2
11.76%
Américo Wang
59
14.43%
6
35.29%
Jakub Kiciński
18
4.40%
1
5.88%
Stephen Hemminger
11
2.69%
1
5.88%
Jamal Hadi Salim
10
2.44%
2
11.76%
Patrick McHardy
2
0.49%
2
11.76%
John Fastabend
1
0.24%
1
5.88%
Total
409
100.00%
17
100.00%


EXPORT_SYMBOL(tcf_idr_create);



void tcf_idr_insert(struct tc_action_net *tn, struct tc_action *a)
{
	struct tcf_idrinfo *idrinfo = tn->idrinfo;

	spin_lock_bh(&idrinfo->lock);
	idr_replace_ext(&idrinfo->action_idr, a, a->tcfa_index);
	spin_unlock_bh(&idrinfo->lock);
}
Contributors
Person
Tokens
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Commits
CommitProp
Américo Wang
22
40.74%
4
57.14%
David S. Miller
18
33.33%
1
14.29%
Chris Mi
13
24.07%
1
14.29%
Jamal Hadi Salim
1
1.85%
1
14.29%
Total
54
100.00%
7
100.00%


EXPORT_SYMBOL(tcf_idr_insert);



void tcf_idrinfo_destroy(const struct tc_action_ops *ops,
			 struct tcf_idrinfo *idrinfo)
{
	struct idr *idr = &idrinfo->action_idr;
	struct tc_action *p;
	int ret;
	unsigned long id = 1;

	idr_for_each_entry_ext(idr, p, id) {
		ret = __tcf_idr_release(p, false, true);
		if (ret == ACT_P_DELETED)
			module_put(ops->owner);
		else if (ret < 0)
			return;
	}
	idr_destroy(&idrinfo->action_idr);
}
Contributors
Person
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CommitProp
Américo Wang
61
67.78%
4
80.00%
Chris Mi
29
32.22%
1
20.00%
Total
90
100.00%
5
100.00%


EXPORT_SYMBOL(tcf_idrinfo_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
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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%

/*TCA_ACT_MAX_PRIO is 32, there count upto 32 */

#define TCA_ACT_MAX_PRIO_MASK 0x1FF


int tcf_action_exec(struct sk_buff *skb, struct tc_action **actions,
		    int nr_actions, struct tcf_result *res)
{
	u32 jmp_prgcnt = 0;
	u32 jmp_ttl = TCA_ACT_MAX_PRIO; /*matches actions per filter */
	int i;
	int ret = TC_ACT_OK;

	if (skb_skip_tc_classify(skb))
		return TC_ACT_OK;

restart_act_graph:
	for (i = 0; i < nr_actions; i++) {
		const struct tc_action *a = actions[i];

		if (jmp_prgcnt > 0) {
			jmp_prgcnt -= 1;
			continue;
		}
repeat:
		ret = a->ops->act(skb, a, res);
		if (ret == TC_ACT_REPEAT)
			goto repeat;	/* we need a ttl - JHS */

		if (TC_ACT_EXT_CMP(ret, TC_ACT_JUMP)) {
			jmp_prgcnt = ret & TCA_ACT_MAX_PRIO_MASK;
			if (!jmp_prgcnt || (jmp_prgcnt > nr_actions)) {
				/* faulty opcode, stop pipeline */
				return TC_ACT_OK;
			} else {
				jmp_ttl -= 1;
				if (jmp_ttl > 0)
					goto restart_act_graph;
				else /* faulty graph, stop pipeline */
					return TC_ACT_OK;
			}
		} else if (TC_ACT_EXT_CMP(ret, TC_ACT_GOTO_CHAIN)) {
			tcf_action_goto_chain_exec(a, res);
		}

		if (ret != TC_ACT_PIPE)
			break;
	}

	return ret;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Jamal Hadi Salim
132
64.39%
3
27.27%
Jiri Pirko
31
15.12%
3
27.27%
Américo Wang
30
14.63%
2
18.18%
Willem de Bruijn
5
2.44%
1
9.09%
David S. Miller
5
2.44%
1
9.09%
Patrick McHardy
2
0.98%
1
9.09%
Total
205
100.00%
11
100.00%


EXPORT_SYMBOL(tcf_action_exec);



int tcf_action_destroy(struct list_head *actions, int bind)
{
	const struct tc_action_ops *ops;
	struct tc_action *a, *tmp;
	int ret = 0;

	list_for_each_entry_safe(a, tmp, actions, list) {
		ops = a->ops;
		ret = __tcf_idr_release(a, bind, true);
		if (ret == ACT_P_DELETED)
			module_put(ops->owner);
		else if (ret < 0)
			return ret;
	}
	return ret;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Américo Wang
40
45.98%
2
25.00%
Jamal Hadi Salim
30
34.48%
2
25.00%
Jiri Pirko
12
13.79%
1
12.50%
Patrick McHardy
2
2.30%
1
12.50%
Daniel Borkmann
2
2.30%
1
12.50%
Chris Mi
1
1.15%
1
12.50%
Total
87
100.00%
8
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 tcf_proto *tp,
				    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 *