[mirror_ubuntu-artful-kernel.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>

#define TUNNEL_KEY_TAB_MASK     15

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_hash_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_hash_create(tn, parm->index, est, a,
				      &act_tunnel_key_ops, bind, true);
		if (ret)
			return ret;

		ret = ACT_P_CREATED;
	} else {
		tcf_hash_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_hash_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_hash_insert(tn, *a);

	return ret;

err_out:
	if (exists)
		tcf_hash_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_hash_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, TUNNEL_KEY_TAB_MASK);
}

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