[linux-block.git] / net / sched / act_tunnel_key.c

/*
 * Copyright (c) 2016, Amir Vadai <amir@vadai.me>
 * Copyright (c) 2016, Mellanox Technologies. All rights reserved.
 *
 * 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.
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/skbuff.h>
#include <linux/rtnetlink.h>
#include <net/netlink.h>
#include <net/pkt_sched.h>
#include <net/dst.h>

#include <linux/tc_act/tc_tunnel_key.h>
#include <net/tc_act/tc_tunnel_key.h>

static unsigned int tunnel_key_net_id;
static struct tc_action_ops act_tunnel_key_ops;

static int tunnel_key_act(struct sk_buff *skb, const struct tc_action *a,
			  struct tcf_result *res)
{
	struct tcf_tunnel_key *t = to_tunnel_key(a);
	struct tcf_tunnel_key_params *params;
	int action;

	rcu_read_lock();

	params = rcu_dereference(t->params);

	tcf_lastuse_update(&t->tcf_tm);
	bstats_cpu_update(this_cpu_ptr(t->common.cpu_bstats), skb);
	action = params->action;

	switch (params->tcft_action) {
	case TCA_TUNNEL_KEY_ACT_RELEASE:
		skb_dst_drop(skb);
		break;
	case TCA_TUNNEL_KEY_ACT_SET:
		skb_dst_drop(skb);
		skb_dst_set(skb, dst_clone(&params->tcft_enc_metadata->dst));
		break;
	default:
		WARN_ONCE(1, "Bad tunnel_key action %d.\n",
			  params->tcft_action);
		break;
	}

	rcu_read_unlock();

	return action;
}

static const struct nla_policy tunnel_key_policy[TCA_TUNNEL_KEY_MAX + 1] = {
	[TCA_TUNNEL_KEY_PARMS]	    = { .len = sizeof(struct tc_tunnel_key) },
	[TCA_TUNNEL_KEY_ENC_IPV4_SRC] = { .type = NLA_U32 },
	[TCA_TUNNEL_KEY_ENC_IPV4_DST] = { .type = NLA_U32 },
	[TCA_TUNNEL_KEY_ENC_IPV6_SRC] = { .len = sizeof(struct in6_addr) },
	[TCA_TUNNEL_KEY_ENC_IPV6_DST] = { .len = sizeof(struct in6_addr) },
	[TCA_TUNNEL_KEY_ENC_KEY_ID]   = { .type = NLA_U32 },
	[TCA_TUNNEL_KEY_ENC_DST_PORT] = {.type = NLA_U16},
	[TCA_TUNNEL_KEY_NO_CSUM]      = { .type = NLA_U8 },
};

static int tunnel_key_init(struct net *net, struct nlattr *nla,
			   struct nlattr *est, struct tc_action **a,
			   int ovr, int bind)
{
	struct tc_action_net *tn = net_generic(net, tunnel_key_net_id);
	struct nlattr *tb[TCA_TUNNEL_KEY_MAX + 1];
	struct tcf_tunnel_key_params *params_old;
	struct tcf_tunnel_key_params *params_new;
	struct metadata_dst *metadata = NULL;
	struct tc_tunnel_key *parm;
	struct tcf_tunnel_key *t;
	bool exists = false;
	__be16 dst_port = 0;
	__be64 key_id;
	__be16 flags;
	int ret = 0;
	int err;

	if (!nla)
		return -EINVAL;

	err = nla_parse_nested(tb, TCA_TUNNEL_KEY_MAX, nla, tunnel_key_policy,
			       NULL);
	if (err < 0)
		return err;

	if (!tb[TCA_TUNNEL_KEY_PARMS])
		return -EINVAL;

	parm = nla_data(tb[TCA_TUNNEL_KEY_PARMS]);
	exists = tcf_idr_check(tn, parm->index, a, bind);
	if (exists && bind)
		return 0;

	switch (parm->t_action) {
	case TCA_TUNNEL_KEY_ACT_RELEASE:
		break;
	case TCA_TUNNEL_KEY_ACT_SET:
		if (!tb[TCA_TUNNEL_KEY_ENC_KEY_ID]) {
			ret = -EINVAL;
			goto err_out;
		}

		key_id = key32_to_tunnel_id(nla_get_be32(tb[TCA_TUNNEL_KEY_ENC_KEY_ID]));

		flags = TUNNEL_KEY | TUNNEL_CSUM;
		if (tb[TCA_TUNNEL_KEY_NO_CSUM] &&
		    nla_get_u8(tb[TCA_TUNNEL_KEY_NO_CSUM]))
			flags &= ~TUNNEL_CSUM;

		if (tb[TCA_TUNNEL_KEY_ENC_DST_PORT])
			dst_port = nla_get_be16(tb[TCA_TUNNEL_KEY_ENC_DST_PORT]);

		if (tb[TCA_TUNNEL_KEY_ENC_IPV4_SRC] &&
		    tb[TCA_TUNNEL_KEY_ENC_IPV4_DST]) {
			__be32 saddr;
			__be32 daddr;

			saddr = nla_get_in_addr(tb[TCA_TUNNEL_KEY_ENC_IPV4_SRC]);
			daddr = nla_get_in_addr(tb[TCA_TUNNEL_KEY_ENC_IPV4_DST]);

			metadata = __ip_tun_set_dst(saddr, daddr, 0, 0,
						    dst_port, flags,
						    key_id, 0);
		} else if (tb[TCA_TUNNEL_KEY_ENC_IPV6_SRC] &&
			   tb[TCA_TUNNEL_KEY_ENC_IPV6_DST]) {
			struct in6_addr saddr;
			struct in6_addr daddr;

			saddr = nla_get_in6_addr(tb[TCA_TUNNEL_KEY_ENC_IPV6_SRC]);
			daddr = nla_get_in6_addr(tb[TCA_TUNNEL_KEY_ENC_IPV6_DST]);

			metadata = __ipv6_tun_set_dst(&saddr, &daddr, 0, 0, dst_port,
						      0, flags,
						      key_id, 0);
		}

		if (!metadata) {
			ret = -EINVAL;
			goto err_out;
		}

		metadata->u.tun_info.mode |= IP_TUNNEL_INFO_TX;
		break;
	default:
		goto err_out;
	}

	if (!exists) {
		ret = tcf_idr_create(tn, parm->index, est, a,
				     &act_tunnel_key_ops, bind, true);
		if (ret)
			return ret;

		ret = ACT_P_CREATED;
	} else {
		tcf_idr_release(*a, bind);
		if (!ovr)
			return -EEXIST;
	}

	t = to_tunnel_key(*a);

	ASSERT_RTNL();
	params_new = kzalloc(sizeof(*params_new), GFP_KERNEL);
	if (unlikely(!params_new)) {
		if (ret == ACT_P_CREATED)
			tcf_idr_release(*a, bind);
		return -ENOMEM;
	}

	params_old = rtnl_dereference(t->params);

	params_new->action = parm->action;
	params_new->tcft_action = parm->t_action;
	params_new->tcft_enc_metadata = metadata;

	rcu_assign_pointer(t->params, params_new);

	if (params_old)
		kfree_rcu(params_old, rcu);

	if (ret == ACT_P_CREATED)
		tcf_idr_insert(tn, *a);

	return ret;

err_out:
	if (exists)
		tcf_idr_release(*a, bind);
	return ret;
}

static void tunnel_key_release(struct tc_action *a, int bind)
{
	struct tcf_tunnel_key *t = to_tunnel_key(a);
	struct tcf_tunnel_key_params *params;

	params = rcu_dereference_protected(t->params, 1);

	if (params->tcft_action == TCA_TUNNEL_KEY_ACT_SET)
		dst_release(&params->tcft_enc_metadata->dst);

	kfree_rcu(params, rcu);
}

static int tunnel_key_dump_addresses(struct sk_buff *skb,
				     const struct ip_tunnel_info *info)
{
	unsigned short family = ip_tunnel_info_af(info);

	if (family == AF_INET) {
		__be32 saddr = info->key.u.ipv4.src;
		__be32 daddr = info->key.u.ipv4.dst;

		if (!nla_put_in_addr(skb, TCA_TUNNEL_KEY_ENC_IPV4_SRC, saddr) &&
		    !nla_put_in_addr(skb, TCA_TUNNEL_KEY_ENC_IPV4_DST, daddr))
			return 0;
	}

	if (family == AF_INET6) {
		const struct in6_addr *saddr6 = &info->key.u.ipv6.src;
		const struct in6_addr *daddr6 = &info->key.u.ipv6.dst;

		if (!nla_put_in6_addr(skb,
				      TCA_TUNNEL_KEY_ENC_IPV6_SRC, saddr6) &&
		    !nla_put_in6_addr(skb,
				      TCA_TUNNEL_KEY_ENC_IPV6_DST, daddr6))
			return 0;
	}

	return -EINVAL;
}

static int tunnel_key_dump(struct sk_buff *skb, struct tc_action *a,
			   int bind, int ref)
{
	unsigned char *b = skb_tail_pointer(skb);
	struct tcf_tunnel_key *t = to_tunnel_key(a);
	struct tcf_tunnel_key_params *params;
	struct tc_tunnel_key opt = {
		.index    = t->tcf_index,
		.refcnt   = t->tcf_refcnt - ref,
		.bindcnt  = t->tcf_bindcnt - bind,
	};
	struct tcf_t tm;

	params = rtnl_dereference(t->params);

	opt.t_action = params->tcft_action;
	opt.action = params->action;

	if (nla_put(skb, TCA_TUNNEL_KEY_PARMS, sizeof(opt), &opt))
		goto nla_put_failure;

	if (params->tcft_action == TCA_TUNNEL_KEY_ACT_SET) {
		struct ip_tunnel_key *key =
			&params->tcft_enc_metadata->u.tun_info.key;
		__be32 key_id = tunnel_id_to_key32(key->tun_id);

		if (nla_put_be32(skb, TCA_TUNNEL_KEY_ENC_KEY_ID, key_id) ||
		    tunnel_key_dump_addresses(skb,
					      &params->tcft_enc_metadata->u.tun_info) ||
		    nla_put_be16(skb, TCA_TUNNEL_KEY_ENC_DST_PORT, key->tp_dst) ||
		    nla_put_u8(skb, TCA_TUNNEL_KEY_NO_CSUM,
			       !(key->tun_flags & TUNNEL_CSUM)))
			goto nla_put_failure;
	}

	tcf_tm_dump(&tm, &t->tcf_tm);
	if (nla_put_64bit(skb, TCA_TUNNEL_KEY_TM, sizeof(tm),
			  &tm, TCA_TUNNEL_KEY_PAD))
		goto nla_put_failure;

	return skb->len;

nla_put_failure:
	nlmsg_trim(skb, b);
	return -1;
}

static int tunnel_key_walker(struct net *net, struct sk_buff *skb,
			     struct netlink_callback *cb, int type,
			     const struct tc_action_ops *ops)
{
	struct tc_action_net *tn = net_generic(net, tunnel_key_net_id);

	return tcf_generic_walker(tn, skb, cb, type, ops);
}

static int tunnel_key_search(struct net *net, struct tc_action **a, u32 index)
{
	struct tc_action_net *tn = net_generic(net, tunnel_key_net_id);

	return tcf_idr_search(tn, a, index);
}

static struct tc_action_ops act_tunnel_key_ops = {
	.kind		=	"tunnel_key",
	.type		=	TCA_ACT_TUNNEL_KEY,
	.owner		=	THIS_MODULE,
	.act		=	tunnel_key_act,
	.dump		=	tunnel_key_dump,
	.init		=	tunnel_key_init,
	.cleanup	=	tunnel_key_release,
	.walk		=	tunnel_key_walker,
	.lookup		=	tunnel_key_search,
	.size		=	sizeof(struct tcf_tunnel_key),
};

static __net_init int tunnel_key_init_net(struct net *net)
{
	struct tc_action_net *tn = net_generic(net, tunnel_key_net_id);

	return tc_action_net_init(tn, &act_tunnel_key_ops, net);
}

static void __net_exit tunnel_key_exit_net(struct net *net)
{
	struct tc_action_net *tn = net_generic(net, tunnel_key_net_id);

	tc_action_net_exit(tn);
}

static struct pernet_operations tunnel_key_net_ops = {
	.init = tunnel_key_init_net,
	.exit = tunnel_key_exit_net,
	.id   = &tunnel_key_net_id,
	.size = sizeof(struct tc_action_net),
};

static int __init tunnel_key_init_module(void)
{
	return tcf_register_action(&act_tunnel_key_ops, &tunnel_key_net_ops);
}

static void __exit tunnel_key_cleanup_module(void)
{
	tcf_unregister_action(&act_tunnel_key_ops, &tunnel_key_net_ops);
}

module_init(tunnel_key_init_module);
module_exit(tunnel_key_cleanup_module);

MODULE_AUTHOR("Amir Vadai <amir@vadai.me>");
MODULE_DESCRIPTION("ip tunnel manipulation actions");
MODULE_LICENSE("GPL v2");
Commit	Line	Data
d0f6dd8a AV	1	/*
	2	* Copyright (c) 2016, Amir Vadai <amir@vadai.me>
	3	* Copyright (c) 2016, Mellanox Technologies. All rights reserved.
	4	*
	5	* This program is free software; you can redistribute it and/or modify
	6	* it under the terms of the GNU General Public License as published by
	7	* the Free Software Foundation; either version 2 of the License, or
	8	* (at your option) any later version.
	9	*/
	10
	11	#include <linux/module.h>
	12	#include <linux/init.h>
	13	#include <linux/kernel.h>
	14	#include <linux/skbuff.h>
	15	#include <linux/rtnetlink.h>
	16	#include <net/netlink.h>
	17	#include <net/pkt_sched.h>
	18	#include <net/dst.h>
d0f6dd8a AV	19
	20	#include <linux/tc_act/tc_tunnel_key.h>
	21	#include <net/tc_act/tc_tunnel_key.h>
	22
c7d03a00	23	static unsigned int tunnel_key_net_id;
d0f6dd8a AV	24	static struct tc_action_ops act_tunnel_key_ops;
	25
	26	static int tunnel_key_act(struct sk_buff skb, const struct tc_action a,
	27	struct tcf_result *res)
	28	{
	29	struct tcf_tunnel_key *t = to_tunnel_key(a);
	30	struct tcf_tunnel_key_params *params;
	31	int action;
	32
	33	rcu_read_lock();
	34
	35	params = rcu_dereference(t->params);
	36
	37	tcf_lastuse_update(&t->tcf_tm);
	38	bstats_cpu_update(this_cpu_ptr(t->common.cpu_bstats), skb);
	39	action = params->action;
	40
	41	switch (params->tcft_action) {
	42	case TCA_TUNNEL_KEY_ACT_RELEASE:
	43	skb_dst_drop(skb);
	44	break;
	45	case TCA_TUNNEL_KEY_ACT_SET:
	46	skb_dst_drop(skb);
	47	skb_dst_set(skb, dst_clone(&params->tcft_enc_metadata->dst));
	48	break;
	49	default:
	50	WARN_ONCE(1, "Bad tunnel_key action %d.\n",
	51	params->tcft_action);
	52	break;
	53	}
	54
	55	rcu_read_unlock();
	56
	57	return action;
	58	}
	59
	60	static const struct nla_policy tunnel_key_policy[TCA_TUNNEL_KEY_MAX + 1] = {
	61	[TCA_TUNNEL_KEY_PARMS] = { .len = sizeof(struct tc_tunnel_key) },
	62	[TCA_TUNNEL_KEY_ENC_IPV4_SRC] = { .type = NLA_U32 },
	63	[TCA_TUNNEL_KEY_ENC_IPV4_DST] = { .type = NLA_U32 },
	64	[TCA_TUNNEL_KEY_ENC_IPV6_SRC] = { .len = sizeof(struct in6_addr) },
	65	[TCA_TUNNEL_KEY_ENC_IPV6_DST] = { .len = sizeof(struct in6_addr) },
	66	[TCA_TUNNEL_KEY_ENC_KEY_ID] = { .type = NLA_U32 },
75bfbca0	67	[TCA_TUNNEL_KEY_ENC_DST_PORT] = {.type = NLA_U16},
86087e17	68	[TCA_TUNNEL_KEY_NO_CSUM] = { .type = NLA_U8 },
d0f6dd8a AV	69	};
	70
	71	static int tunnel_key_init(struct net net, struct nlattr nla,
	72	struct nlattr est, struct tc_action *a,
	73	int ovr, int bind)
	74	{
	75	struct tc_action_net *tn = net_generic(net, tunnel_key_net_id);
	76	struct nlattr *tb[TCA_TUNNEL_KEY_MAX + 1];
	77	struct tcf_tunnel_key_params *params_old;
	78	struct tcf_tunnel_key_params *params_new;
	79	struct metadata_dst *metadata = NULL;
	80	struct tc_tunnel_key *parm;
	81	struct tcf_tunnel_key *t;
	82	bool exists = false;
75bfbca0	83	__be16 dst_port = 0;
d0f6dd8a	84	__be64 key_id;
86087e17	85	__be16 flags;
d0f6dd8a AV	86	int ret = 0;
	87	int err;
	88
	89	if (!nla)
	90	return -EINVAL;
	91
fceb6435 JB	92	err = nla_parse_nested(tb, TCA_TUNNEL_KEY_MAX, nla, tunnel_key_policy,
fceb6435 JB	93	NULL);
d0f6dd8a AV	94	if (err < 0)
	95	return err;
	96
	97	if (!tb[TCA_TUNNEL_KEY_PARMS])
	98	return -EINVAL;
	99
	100	parm = nla_data(tb[TCA_TUNNEL_KEY_PARMS]);
65a206c0	101	exists = tcf_idr_check(tn, parm->index, a, bind);
d0f6dd8a AV	102	if (exists && bind)
	103	return 0;
	104
	105	switch (parm->t_action) {
	106	case TCA_TUNNEL_KEY_ACT_RELEASE:
	107	break;
	108	case TCA_TUNNEL_KEY_ACT_SET:
	109	if (!tb[TCA_TUNNEL_KEY_ENC_KEY_ID]) {
	110	ret = -EINVAL;
	111	goto err_out;
	112	}
	113
	114	key_id = key32_to_tunnel_id(nla_get_be32(tb[TCA_TUNNEL_KEY_ENC_KEY_ID]));
	115
86087e17 JB	116	flags = TUNNEL_KEY \| TUNNEL_CSUM;
	117	if (tb[TCA_TUNNEL_KEY_NO_CSUM] &&
	118	nla_get_u8(tb[TCA_TUNNEL_KEY_NO_CSUM]))
	119	flags &= ~TUNNEL_CSUM;
	120
75bfbca0 HHZ	121	if (tb[TCA_TUNNEL_KEY_ENC_DST_PORT])
	122	dst_port = nla_get_be16(tb[TCA_TUNNEL_KEY_ENC_DST_PORT]);
	123
d0f6dd8a AV	124	if (tb[TCA_TUNNEL_KEY_ENC_IPV4_SRC] &&
	125	tb[TCA_TUNNEL_KEY_ENC_IPV4_DST]) {
	126	__be32 saddr;
	127	__be32 daddr;
	128
	129	saddr = nla_get_in_addr(tb[TCA_TUNNEL_KEY_ENC_IPV4_SRC]);
	130	daddr = nla_get_in_addr(tb[TCA_TUNNEL_KEY_ENC_IPV4_DST]);
	131
	132	metadata = __ip_tun_set_dst(saddr, daddr, 0, 0,
86087e17	133	dst_port, flags,
75bfbca0	134	key_id, 0);
d0f6dd8a AV	135	} else if (tb[TCA_TUNNEL_KEY_ENC_IPV6_SRC] &&
	136	tb[TCA_TUNNEL_KEY_ENC_IPV6_DST]) {
	137	struct in6_addr saddr;
	138	struct in6_addr daddr;
	139
	140	saddr = nla_get_in6_addr(tb[TCA_TUNNEL_KEY_ENC_IPV6_SRC]);
	141	daddr = nla_get_in6_addr(tb[TCA_TUNNEL_KEY_ENC_IPV6_DST]);
	142
dc594ecd	143	metadata = __ipv6_tun_set_dst(&saddr, &daddr, 0, 0, dst_port,
86087e17	144	0, flags,
75bfbca0	145	key_id, 0);
d0f6dd8a AV	146	}
	147
	148	if (!metadata) {
	149	ret = -EINVAL;
	150	goto err_out;
	151	}
	152
	153	metadata->u.tun_info.mode \|= IP_TUNNEL_INFO_TX;
	154	break;
	155	default:
	156	goto err_out;
	157	}
	158
	159	if (!exists) {
65a206c0 CM	160	ret = tcf_idr_create(tn, parm->index, est, a,
65a206c0 CM	161	&act_tunnel_key_ops, bind, true);
d0f6dd8a AV	162	if (ret)
	163	return ret;
	164
	165	ret = ACT_P_CREATED;
	166	} else {
65a206c0	167	tcf_idr_release(*a, bind);
d0f6dd8a AV	168	if (!ovr)
	169	return -EEXIST;
	170	}
	171
	172	t = to_tunnel_key(*a);
	173
	174	ASSERT_RTNL();
	175	params_new = kzalloc(sizeof(*params_new), GFP_KERNEL);
	176	if (unlikely(!params_new)) {
	177	if (ret == ACT_P_CREATED)
65a206c0	178	tcf_idr_release(*a, bind);
d0f6dd8a AV	179	return -ENOMEM;
	180	}
	181
	182	params_old = rtnl_dereference(t->params);
	183
	184	params_new->action = parm->action;
	185	params_new->tcft_action = parm->t_action;
	186	params_new->tcft_enc_metadata = metadata;
	187
	188	rcu_assign_pointer(t->params, params_new);
	189
	190	if (params_old)
	191	kfree_rcu(params_old, rcu);
	192
	193	if (ret == ACT_P_CREATED)
65a206c0	194	tcf_idr_insert(tn, *a);
d0f6dd8a AV	195
	196	return ret;
	197
	198	err_out:
	199	if (exists)
65a206c0	200	tcf_idr_release(*a, bind);
d0f6dd8a AV	201	return ret;
	202	}
	203
	204	static void tunnel_key_release(struct tc_action *a, int bind)
	205	{
	206	struct tcf_tunnel_key *t = to_tunnel_key(a);
	207	struct tcf_tunnel_key_params *params;
	208
07c0f09e	209	params = rcu_dereference_protected(t->params, 1);
d0f6dd8a AV	210
	211	if (params->tcft_action == TCA_TUNNEL_KEY_ACT_SET)
	212	dst_release(&params->tcft_enc_metadata->dst);
	213
	214	kfree_rcu(params, rcu);
d0f6dd8a AV	215	}
	216
	217	static int tunnel_key_dump_addresses(struct sk_buff *skb,
	218	const struct ip_tunnel_info *info)
	219	{
	220	unsigned short family = ip_tunnel_info_af(info);
	221
	222	if (family == AF_INET) {
	223	__be32 saddr = info->key.u.ipv4.src;
	224	__be32 daddr = info->key.u.ipv4.dst;
	225
	226	if (!nla_put_in_addr(skb, TCA_TUNNEL_KEY_ENC_IPV4_SRC, saddr) &&
	227	!nla_put_in_addr(skb, TCA_TUNNEL_KEY_ENC_IPV4_DST, daddr))
	228	return 0;
	229	}
	230
	231	if (family == AF_INET6) {
	232	const struct in6_addr *saddr6 = &info->key.u.ipv6.src;
	233	const struct in6_addr *daddr6 = &info->key.u.ipv6.dst;
	234
	235	if (!nla_put_in6_addr(skb,
	236	TCA_TUNNEL_KEY_ENC_IPV6_SRC, saddr6) &&
	237	!nla_put_in6_addr(skb,
	238	TCA_TUNNEL_KEY_ENC_IPV6_DST, daddr6))
	239	return 0;
	240	}
	241
	242	return -EINVAL;
	243	}
	244
	245	static int tunnel_key_dump(struct sk_buff skb, struct tc_action a,
	246	int bind, int ref)
	247	{
	248	unsigned char *b = skb_tail_pointer(skb);
	249	struct tcf_tunnel_key *t = to_tunnel_key(a);
	250	struct tcf_tunnel_key_params *params;
	251	struct tc_tunnel_key opt = {
	252	.index = t->tcf_index,
	253	.refcnt = t->tcf_refcnt - ref,
	254	.bindcnt = t->tcf_bindcnt - bind,
	255	};
	256	struct tcf_t tm;
d0f6dd8a	257
07c0f09e	258	params = rtnl_dereference(t->params);
d0f6dd8a AV	259
	260	opt.t_action = params->tcft_action;
	261	opt.action = params->action;
	262
	263	if (nla_put(skb, TCA_TUNNEL_KEY_PARMS, sizeof(opt), &opt))
	264	goto nla_put_failure;
	265
	266	if (params->tcft_action == TCA_TUNNEL_KEY_ACT_SET) {
	267	struct ip_tunnel_key *key =
	268	&params->tcft_enc_metadata->u.tun_info.key;
	269	__be32 key_id = tunnel_id_to_key32(key->tun_id);
	270
	271	if (nla_put_be32(skb, TCA_TUNNEL_KEY_ENC_KEY_ID, key_id) \|\|
	272	tunnel_key_dump_addresses(skb,
75bfbca0	273	&params->tcft_enc_metadata->u.tun_info) \|\|
86087e17 JB	274	nla_put_be16(skb, TCA_TUNNEL_KEY_ENC_DST_PORT, key->tp_dst) \|\|
	275	nla_put_u8(skb, TCA_TUNNEL_KEY_NO_CSUM,
	276	!(key->tun_flags & TUNNEL_CSUM)))
d0f6dd8a AV	277	goto nla_put_failure;
	278	}
	279
	280	tcf_tm_dump(&tm, &t->tcf_tm);
	281	if (nla_put_64bit(skb, TCA_TUNNEL_KEY_TM, sizeof(tm),
	282	&tm, TCA_TUNNEL_KEY_PAD))
	283	goto nla_put_failure;
	284
07c0f09e	285	return skb->len;
d0f6dd8a AV	286
	287	nla_put_failure:
	288	nlmsg_trim(skb, b);
07c0f09e	289	return -1;
d0f6dd8a AV	290	}
	291
	292	static int tunnel_key_walker(struct net net, struct sk_buff skb,
	293	struct netlink_callback *cb, int type,
	294	const struct tc_action_ops *ops)
	295	{
	296	struct tc_action_net *tn = net_generic(net, tunnel_key_net_id);
	297
	298	return tcf_generic_walker(tn, skb, cb, type, ops);
	299	}
	300
	301	static int tunnel_key_search(struct net net, struct tc_action *a, u32 index)
	302	{
	303	struct tc_action_net *tn = net_generic(net, tunnel_key_net_id);
	304
65a206c0	305	return tcf_idr_search(tn, a, index);
d0f6dd8a AV	306	}
	307
	308	static struct tc_action_ops act_tunnel_key_ops = {
	309	.kind = "tunnel_key",
	310	.type = TCA_ACT_TUNNEL_KEY,
	311	.owner = THIS_MODULE,
	312	.act = tunnel_key_act,
	313	.dump = tunnel_key_dump,
	314	.init = tunnel_key_init,
	315	.cleanup = tunnel_key_release,
	316	.walk = tunnel_key_walker,
	317	.lookup = tunnel_key_search,
	318	.size = sizeof(struct tcf_tunnel_key),
	319	};
	320
	321	static __net_init int tunnel_key_init_net(struct net *net)
	322	{
	323	struct tc_action_net *tn = net_generic(net, tunnel_key_net_id);
	324
ceffcc5e	325	return tc_action_net_init(tn, &act_tunnel_key_ops, net);
d0f6dd8a AV	326	}
	327
	328	static void __net_exit tunnel_key_exit_net(struct net *net)
	329	{
	330	struct tc_action_net *tn = net_generic(net, tunnel_key_net_id);
	331
	332	tc_action_net_exit(tn);
	333	}
	334
	335	static struct pernet_operations tunnel_key_net_ops = {
	336	.init = tunnel_key_init_net,
	337	.exit = tunnel_key_exit_net,
	338	.id = &tunnel_key_net_id,
	339	.size = sizeof(struct tc_action_net),
	340	};
	341
	342	static int __init tunnel_key_init_module(void)
	343	{
	344	return tcf_register_action(&act_tunnel_key_ops, &tunnel_key_net_ops);
	345	}
	346
	347	static void __exit tunnel_key_cleanup_module(void)
	348	{
	349	tcf_unregister_action(&act_tunnel_key_ops, &tunnel_key_net_ops);
	350	}
	351
	352	module_init(tunnel_key_init_module);
	353	module_exit(tunnel_key_cleanup_module);
	354
	355	MODULE_AUTHOR("Amir Vadai <amir@vadai.me>");
	356	MODULE_DESCRIPTION("ip tunnel manipulation actions");
	357	MODULE_LICENSE("GPL v2");