[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/geneve.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;

	params = rcu_dereference_bh(t->params);

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

	return action;
}

static const struct nla_policy
enc_opts_policy[TCA_TUNNEL_KEY_ENC_OPTS_MAX + 1] = {
	[TCA_TUNNEL_KEY_ENC_OPTS_GENEVE]	= { .type = NLA_NESTED },
};

static const struct nla_policy
geneve_opt_policy[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_MAX + 1] = {
	[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_CLASS]	   = { .type = NLA_U16 },
	[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_TYPE]	   = { .type = NLA_U8 },
	[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_DATA]	   = { .type = NLA_BINARY,
						       .len = 128 },
};

static int
tunnel_key_copy_geneve_opt(const struct nlattr *nla, void *dst, int dst_len,
			   struct netlink_ext_ack *extack)
{
	struct nlattr *tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_MAX + 1];
	int err, data_len, opt_len;
	u8 *data;

	err = nla_parse_nested(tb, TCA_TUNNEL_KEY_ENC_OPT_GENEVE_MAX,
			       nla, geneve_opt_policy, extack);
	if (err < 0)
		return err;

	if (!tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_CLASS] ||
	    !tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_TYPE] ||
	    !tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_DATA]) {
		NL_SET_ERR_MSG(extack, "Missing tunnel key geneve option class, type or data");
		return -EINVAL;
	}

	data = nla_data(tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_DATA]);
	data_len = nla_len(tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_DATA]);
	if (data_len < 4) {
		NL_SET_ERR_MSG(extack, "Tunnel key geneve option data is less than 4 bytes long");
		return -ERANGE;
	}
	if (data_len % 4) {
		NL_SET_ERR_MSG(extack, "Tunnel key geneve option data is not a multiple of 4 bytes long");
		return -ERANGE;
	}

	opt_len = sizeof(struct geneve_opt) + data_len;
	if (dst) {
		struct geneve_opt *opt = dst;

		WARN_ON(dst_len < opt_len);

		opt->opt_class =
			nla_get_be16(tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_CLASS]);
		opt->type = nla_get_u8(tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_TYPE]);
		opt->length = data_len / 4; /* length is in units of 4 bytes */
		opt->r1 = 0;
		opt->r2 = 0;
		opt->r3 = 0;

		memcpy(opt + 1, data, data_len);
	}

	return opt_len;
}

static int tunnel_key_copy_opts(const struct nlattr *nla, u8 *dst,
				int dst_len, struct netlink_ext_ack *extack)
{
	int err, rem, opt_len, len = nla_len(nla), opts_len = 0;
	const struct nlattr *attr, *head = nla_data(nla);

	err = nla_validate(head, len, TCA_TUNNEL_KEY_ENC_OPTS_MAX,
			   enc_opts_policy, extack);
	if (err)
		return err;

	nla_for_each_attr(attr, head, len, rem) {
		switch (nla_type(attr)) {
		case TCA_TUNNEL_KEY_ENC_OPTS_GENEVE:
			opt_len = tunnel_key_copy_geneve_opt(attr, dst,
							     dst_len, extack);
			if (opt_len < 0)
				return opt_len;
			opts_len += opt_len;
			if (dst) {
				dst_len -= opt_len;
				dst += opt_len;
			}
			break;
		}
	}

	if (!opts_len) {
		NL_SET_ERR_MSG(extack, "Empty list of tunnel options");
		return -EINVAL;
	}

	if (rem > 0) {
		NL_SET_ERR_MSG(extack, "Trailing data after parsing tunnel key options attributes");
		return -EINVAL;
	}

	return opts_len;
}

static int tunnel_key_get_opts_len(struct nlattr *nla,
				   struct netlink_ext_ack *extack)
{
	return tunnel_key_copy_opts(nla, NULL, 0, extack);
}

static int tunnel_key_opts_set(struct nlattr *nla, struct ip_tunnel_info *info,
			       int opts_len, struct netlink_ext_ack *extack)
{
	info->options_len = opts_len;
	switch (nla_type(nla_data(nla))) {
	case TCA_TUNNEL_KEY_ENC_OPTS_GENEVE:
#if IS_ENABLED(CONFIG_INET)
		info->key.tun_flags |= TUNNEL_GENEVE_OPT;
		return tunnel_key_copy_opts(nla, ip_tunnel_info_opts(info),
					    opts_len, extack);
#else
		return -EAFNOSUPPORT;
#endif
	default:
		NL_SET_ERR_MSG(extack, "Cannot set tunnel options for unknown tunnel type");
		return -EINVAL;
	}
}

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 },
	[TCA_TUNNEL_KEY_ENC_OPTS]     = { .type = NLA_NESTED },
	[TCA_TUNNEL_KEY_ENC_TOS]      = { .type = NLA_U8 },
	[TCA_TUNNEL_KEY_ENC_TTL]      = { .type = NLA_U8 },
};

static void tunnel_key_release_params(struct tcf_tunnel_key_params *p)
{
	if (!p)
		return;
	if (p->tcft_action == TCA_TUNNEL_KEY_ACT_SET)
		dst_release(&p->tcft_enc_metadata->dst);
	kfree_rcu(p, rcu);
}

static int tunnel_key_init(struct net *net, struct nlattr *nla,
			   struct nlattr *est, struct tc_action **a,
			   int ovr, int bind, bool rtnl_held,
			   struct netlink_ext_ack *extack)
{
	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_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 = 0;
	int opts_len = 0;
	__be16 flags = 0;
	u8 tos, ttl;
	int ret = 0;
	int err;

	if (!nla) {
		NL_SET_ERR_MSG(extack, "Tunnel requires attributes to be passed");
		return -EINVAL;
	}

	err = nla_parse_nested(tb, TCA_TUNNEL_KEY_MAX, nla, tunnel_key_policy,
			       extack);
	if (err < 0) {
		NL_SET_ERR_MSG(extack, "Failed to parse nested tunnel key attributes");
		return err;
	}

	if (!tb[TCA_TUNNEL_KEY_PARMS]) {
		NL_SET_ERR_MSG(extack, "Missing tunnel key parameters");
		return -EINVAL;
	}

	parm = nla_data(tb[TCA_TUNNEL_KEY_PARMS]);
	err = tcf_idr_check_alloc(tn, &parm->index, a, bind);
	if (err < 0)
		return err;
	exists = err;
	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]) {
			__be32 key32;

			key32 = nla_get_be32(tb[TCA_TUNNEL_KEY_ENC_KEY_ID]);
			key_id = key32_to_tunnel_id(key32);
			flags = TUNNEL_KEY;
		}

		flags |= 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_OPTS]) {
			opts_len = tunnel_key_get_opts_len(tb[TCA_TUNNEL_KEY_ENC_OPTS],
							   extack);
			if (opts_len < 0) {
				ret = opts_len;
				goto err_out;
			}
		}

		tos = 0;
		if (tb[TCA_TUNNEL_KEY_ENC_TOS])
			tos = nla_get_u8(tb[TCA_TUNNEL_KEY_ENC_TOS]);
		ttl = 0;
		if (tb[TCA_TUNNEL_KEY_ENC_TTL])
			ttl = nla_get_u8(tb[TCA_TUNNEL_KEY_ENC_TTL]);

		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, tos, ttl,
						    dst_port, flags,
						    key_id, opts_len);
		} 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, tos, ttl, dst_port,
						      0, flags,
						      key_id, 0);
		} else {
			NL_SET_ERR_MSG(extack, "Missing either ipv4 or ipv6 src and dst");
			ret = -EINVAL;
			goto err_out;
		}

		if (!metadata) {
			NL_SET_ERR_MSG(extack, "Cannot allocate tunnel metadata dst");
			ret = -ENOMEM;
			goto err_out;
		}

		if (opts_len) {
			ret = tunnel_key_opts_set(tb[TCA_TUNNEL_KEY_ENC_OPTS],
						  &metadata->u.tun_info,
						  opts_len, extack);
			if (ret < 0)
				goto release_tun_meta;
		}

		metadata->u.tun_info.mode |= IP_TUNNEL_INFO_TX;
		break;
	default:
		NL_SET_ERR_MSG(extack, "Unknown tunnel key action");
		ret = -EINVAL;
		goto err_out;
	}

	if (!exists) {
		ret = tcf_idr_create(tn, parm->index, est, a,
				     &act_tunnel_key_ops, bind, true);
		if (ret) {
			NL_SET_ERR_MSG(extack, "Cannot create TC IDR");
			goto release_tun_meta;
		}

		ret = ACT_P_CREATED;
	} else if (!ovr) {
		NL_SET_ERR_MSG(extack, "TC IDR already exists");
		ret = -EEXIST;
		goto release_tun_meta;
	}

	t = to_tunnel_key(*a);

	params_new = kzalloc(sizeof(*params_new), GFP_KERNEL);
	if (unlikely(!params_new)) {
		NL_SET_ERR_MSG(extack, "Cannot allocate tunnel key parameters");
		ret = -ENOMEM;
		exists = true;
		goto release_tun_meta;
	}
	params_new->tcft_action = parm->t_action;
	params_new->tcft_enc_metadata = metadata;

	spin_lock_bh(&t->tcf_lock);
	t->tcf_action = parm->action;
	rcu_swap_protected(t->params, params_new,
			   lockdep_is_held(&t->tcf_lock));
	spin_unlock_bh(&t->tcf_lock);
	tunnel_key_release_params(params_new);

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

	return ret;

release_tun_meta:
	dst_release(&metadata->dst);

err_out:
	if (exists)
		tcf_idr_release(*a, bind);
	else
		tcf_idr_cleanup(tn, parm->index);
	return ret;
}

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

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

static int tunnel_key_geneve_opts_dump(struct sk_buff *skb,
				       const struct ip_tunnel_info *info)
{
	int len = info->options_len;
	u8 *src = (u8 *)(info + 1);
	struct nlattr *start;

	start = nla_nest_start(skb, TCA_TUNNEL_KEY_ENC_OPTS_GENEVE);
	if (!start)
		return -EMSGSIZE;

	while (len > 0) {
		struct geneve_opt *opt = (struct geneve_opt *)src;

		if (nla_put_be16(skb, TCA_TUNNEL_KEY_ENC_OPT_GENEVE_CLASS,
				 opt->opt_class) ||
		    nla_put_u8(skb, TCA_TUNNEL_KEY_ENC_OPT_GENEVE_TYPE,
			       opt->type) ||
		    nla_put(skb, TCA_TUNNEL_KEY_ENC_OPT_GENEVE_DATA,
			    opt->length * 4, opt + 1)) {
			nla_nest_cancel(skb, start);
			return -EMSGSIZE;
		}

		len -= sizeof(struct geneve_opt) + opt->length * 4;
		src += sizeof(struct geneve_opt) + opt->length * 4;
	}

	nla_nest_end(skb, start);
	return 0;
}

static int tunnel_key_opts_dump(struct sk_buff *skb,
				const struct ip_tunnel_info *info)
{
	struct nlattr *start;
	int err = -EINVAL;

	if (!info->options_len)
		return 0;

	start = nla_nest_start(skb, TCA_TUNNEL_KEY_ENC_OPTS);
	if (!start)
		return -EMSGSIZE;

	if (info->key.tun_flags & TUNNEL_GENEVE_OPT) {
		err = tunnel_key_geneve_opts_dump(skb, info);
		if (err)
			goto err_out;
	} else {
err_out:
		nla_nest_cancel(skb, start);
		return err;
	}

	nla_nest_end(skb, start);
	return 0;
}

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   = refcount_read(&t->tcf_refcnt) - ref,
		.bindcnt  = atomic_read(&t->tcf_bindcnt) - bind,
	};
	struct tcf_t tm;

	spin_lock_bh(&t->tcf_lock);
	params = rcu_dereference_protected(t->params,
					   lockdep_is_held(&t->tcf_lock));
	opt.action   = t->tcf_action;
	opt.t_action = params->tcft_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_info *info =
			&params->tcft_enc_metadata->u.tun_info;
		struct ip_tunnel_key *key = &info->key;
		__be32 key_id = tunnel_id_to_key32(key->tun_id);

		if (((key->tun_flags & TUNNEL_KEY) &&
		     nla_put_be32(skb, TCA_TUNNEL_KEY_ENC_KEY_ID, key_id)) ||
		    tunnel_key_dump_addresses(skb,
					      &params->tcft_enc_metadata->u.tun_info) ||
		    (key->tp_dst &&
		      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)) ||
		    tunnel_key_opts_dump(skb, info))
			goto nla_put_failure;

		if (key->tos && nla_put_u8(skb, TCA_TUNNEL_KEY_ENC_TOS, key->tos))
			goto nla_put_failure;

		if (key->ttl && nla_put_u8(skb, TCA_TUNNEL_KEY_ENC_TTL, key->ttl))
			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;
	spin_unlock_bh(&t->tcf_lock);

	return skb->len;

nla_put_failure:
	spin_unlock_bh(&t->tcf_lock);
	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 netlink_ext_ack *extack)
{
	struct tc_action_net *tn = net_generic(net, tunnel_key_net_id);

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

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",
	.id		=	TCA_ID_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);
}

static void __net_exit tunnel_key_exit_net(struct list_head *net_list)
{
	tc_action_net_exit(net_list, tunnel_key_net_id);
}

static struct pernet_operations tunnel_key_net_ops = {
	.init = tunnel_key_init_net,
	.exit_batch = 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>
0ed5269f	16	#include <net/geneve.h>
d0f6dd8a AV	17	#include <net/netlink.h>
	18	#include <net/pkt_sched.h>
	19	#include <net/dst.h>
d0f6dd8a AV	20
	21	#include <linux/tc_act/tc_tunnel_key.h>
	22	#include <net/tc_act/tc_tunnel_key.h>
	23
c7d03a00	24	static unsigned int tunnel_key_net_id;
d0f6dd8a AV	25	static struct tc_action_ops act_tunnel_key_ops;
	26
	27	static int tunnel_key_act(struct sk_buff skb, const struct tc_action a,
	28	struct tcf_result *res)
	29	{
	30	struct tcf_tunnel_key *t = to_tunnel_key(a);
	31	struct tcf_tunnel_key_params *params;
	32	int action;
	33
7fd4b288	34	params = rcu_dereference_bh(t->params);
d0f6dd8a AV	35
	36	tcf_lastuse_update(&t->tcf_tm);
	37	bstats_cpu_update(this_cpu_ptr(t->common.cpu_bstats), skb);
38230a3e	38	action = READ_ONCE(t->tcf_action);
d0f6dd8a AV	39
	40	switch (params->tcft_action) {
	41	case TCA_TUNNEL_KEY_ACT_RELEASE:
	42	skb_dst_drop(skb);
	43	break;
	44	case TCA_TUNNEL_KEY_ACT_SET:
	45	skb_dst_drop(skb);
	46	skb_dst_set(skb, dst_clone(&params->tcft_enc_metadata->dst));
	47	break;
	48	default:
	49	WARN_ONCE(1, "Bad tunnel_key action %d.\n",
	50	params->tcft_action);
	51	break;
	52	}
	53
d0f6dd8a AV	54	return action;
	55	}
	56
0ed5269f SH	57	static const struct nla_policy
	58	enc_opts_policy[TCA_TUNNEL_KEY_ENC_OPTS_MAX + 1] = {
	59	[TCA_TUNNEL_KEY_ENC_OPTS_GENEVE] = { .type = NLA_NESTED },
	60	};
	61
	62	static const struct nla_policy
	63	geneve_opt_policy[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_MAX + 1] = {
	64	[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_CLASS] = { .type = NLA_U16 },
	65	[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_TYPE] = { .type = NLA_U8 },
	66	[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_DATA] = { .type = NLA_BINARY,
	67	.len = 128 },
	68	};
	69
	70	static int
	71	tunnel_key_copy_geneve_opt(const struct nlattr nla, void dst, int dst_len,
	72	struct netlink_ext_ack *extack)
	73	{
	74	struct nlattr *tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_MAX + 1];
	75	int err, data_len, opt_len;
	76	u8 *data;
	77
	78	err = nla_parse_nested(tb, TCA_TUNNEL_KEY_ENC_OPT_GENEVE_MAX,
	79	nla, geneve_opt_policy, extack);
	80	if (err < 0)
	81	return err;
	82
	83	if (!tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_CLASS] \|\|
	84	!tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_TYPE] \|\|
	85	!tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_DATA]) {
	86	NL_SET_ERR_MSG(extack, "Missing tunnel key geneve option class, type or data");
	87	return -EINVAL;
	88	}
	89
	90	data = nla_data(tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_DATA]);
	91	data_len = nla_len(tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_DATA]);
	92	if (data_len < 4) {
	93	NL_SET_ERR_MSG(extack, "Tunnel key geneve option data is less than 4 bytes long");
	94	return -ERANGE;
	95	}
	96	if (data_len % 4) {
	97	NL_SET_ERR_MSG(extack, "Tunnel key geneve option data is not a multiple of 4 bytes long");
	98	return -ERANGE;
	99	}
	100
	101	opt_len = sizeof(struct geneve_opt) + data_len;
	102	if (dst) {
	103	struct geneve_opt *opt = dst;
	104
	105	WARN_ON(dst_len < opt_len);
	106
	107	opt->opt_class =
	108	nla_get_be16(tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_CLASS]);
	109	opt->type = nla_get_u8(tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_TYPE]);
	110	opt->length = data_len / 4; /* length is in units of 4 bytes */
	111	opt->r1 = 0;
	112	opt->r2 = 0;
	113	opt->r3 = 0;
	114
	115	memcpy(opt + 1, data, data_len);
	116	}
	117
	118	return opt_len;
	119	}
	120
121	static int tunnel_key_copy_opts(const struct nlattr nla, u8 dst,
122	int dst_len, struct netlink_ext_ack *extack)
123	{
124	int err, rem, opt_len, len = nla_len(nla), opts_len = 0;
125	const struct nlattr attr, head = nla_data(nla);
126
127	err = nla_validate(head, len, TCA_TUNNEL_KEY_ENC_OPTS_MAX,
128	enc_opts_policy, extack);
129	if (err)
130	return err;
131
132	nla_for_each_attr(attr, head, len, rem) {
133	switch (nla_type(attr)) {
134	case TCA_TUNNEL_KEY_ENC_OPTS_GENEVE:
135	opt_len = tunnel_key_copy_geneve_opt(attr, dst,
136	dst_len, extack);
137	if (opt_len < 0)
138	return opt_len;
139	opts_len += opt_len;
140	if (dst) {
141	dst_len -= opt_len;
142	dst += opt_len;
143	}
144	break;
145	}
146	}
147
148	if (!opts_len) {
149	NL_SET_ERR_MSG(extack, "Empty list of tunnel options");
150	return -EINVAL;
151	}
152
153	if (rem > 0) {
154	NL_SET_ERR_MSG(extack, "Trailing data after parsing tunnel key options attributes");
155	return -EINVAL;
156	}
157
158	return opts_len;
159	}
160
161	static int tunnel_key_get_opts_len(struct nlattr *nla,
162	struct netlink_ext_ack *extack)
163	{
164	return tunnel_key_copy_opts(nla, NULL, 0, extack);
165	}
166
167	static int tunnel_key_opts_set(struct nlattr nla, struct ip_tunnel_info info,
168	int opts_len, struct netlink_ext_ack *extack)
169	{
170	info->options_len = opts_len;
171	switch (nla_type(nla_data(nla))) {
172	case TCA_TUNNEL_KEY_ENC_OPTS_GENEVE:
173	#if IS_ENABLED(CONFIG_INET)
174	info->key.tun_flags \|= TUNNEL_GENEVE_OPT;
175	return tunnel_key_copy_opts(nla, ip_tunnel_info_opts(info),
176	opts_len, extack);
177	#else
178	return -EAFNOSUPPORT;
179	#endif
180	default:
181	NL_SET_ERR_MSG(extack, "Cannot set tunnel options for unknown tunnel type");
182	return -EINVAL;
183	}
184	}
185
d0f6dd8a AV	186	static const struct nla_policy tunnel_key_policy[TCA_TUNNEL_KEY_MAX + 1] = {
	187	[TCA_TUNNEL_KEY_PARMS] = { .len = sizeof(struct tc_tunnel_key) },
	188	[TCA_TUNNEL_KEY_ENC_IPV4_SRC] = { .type = NLA_U32 },
	189	[TCA_TUNNEL_KEY_ENC_IPV4_DST] = { .type = NLA_U32 },
	190	[TCA_TUNNEL_KEY_ENC_IPV6_SRC] = { .len = sizeof(struct in6_addr) },
	191	[TCA_TUNNEL_KEY_ENC_IPV6_DST] = { .len = sizeof(struct in6_addr) },
	192	[TCA_TUNNEL_KEY_ENC_KEY_ID] = { .type = NLA_U32 },
75bfbca0	193	[TCA_TUNNEL_KEY_ENC_DST_PORT] = {.type = NLA_U16},
86087e17	194	[TCA_TUNNEL_KEY_NO_CSUM] = { .type = NLA_U8 },
0ed5269f	195	[TCA_TUNNEL_KEY_ENC_OPTS] = { .type = NLA_NESTED },
07a557f4 OG	196	[TCA_TUNNEL_KEY_ENC_TOS] = { .type = NLA_U8 },
07a557f4 OG	197	[TCA_TUNNEL_KEY_ENC_TTL] = { .type = NLA_U8 },
d0f6dd8a AV	198	};
d0f6dd8a AV	199
9174c3df DC	200	static void tunnel_key_release_params(struct tcf_tunnel_key_params *p)
	201	{
	202	if (!p)
	203	return;
	204	if (p->tcft_action == TCA_TUNNEL_KEY_ACT_SET)
	205	dst_release(&p->tcft_enc_metadata->dst);
	206	kfree_rcu(p, rcu);
	207	}
	208
d0f6dd8a AV	209	static int tunnel_key_init(struct net net, struct nlattr nla,
d0f6dd8a AV	210	struct nlattr est, struct tc_action *a,
789871bb VB	211	int ovr, int bind, bool rtnl_held,
789871bb VB	212	struct netlink_ext_ack *extack)
d0f6dd8a AV	213	{
	214	struct tc_action_net *tn = net_generic(net, tunnel_key_net_id);
	215	struct nlattr *tb[TCA_TUNNEL_KEY_MAX + 1];
d0f6dd8a AV	216	struct tcf_tunnel_key_params *params_new;
	217	struct metadata_dst *metadata = NULL;
	218	struct tc_tunnel_key *parm;
	219	struct tcf_tunnel_key *t;
	220	bool exists = false;
75bfbca0	221	__be16 dst_port = 0;
80ef0f22	222	__be64 key_id = 0;
0ed5269f	223	int opts_len = 0;
80ef0f22	224	__be16 flags = 0;
07a557f4	225	u8 tos, ttl;
d0f6dd8a AV	226	int ret = 0;
	227	int err;
	228
9d7298cd SH	229	if (!nla) {
9d7298cd SH	230	NL_SET_ERR_MSG(extack, "Tunnel requires attributes to be passed");
d0f6dd8a	231	return -EINVAL;
9d7298cd	232	}
d0f6dd8a	233
fceb6435	234	err = nla_parse_nested(tb, TCA_TUNNEL_KEY_MAX, nla, tunnel_key_policy,
9d7298cd SH	235	extack);
	236	if (err < 0) {
	237	NL_SET_ERR_MSG(extack, "Failed to parse nested tunnel key attributes");
d0f6dd8a	238	return err;
9d7298cd	239	}
d0f6dd8a	240
9d7298cd SH	241	if (!tb[TCA_TUNNEL_KEY_PARMS]) {
9d7298cd SH	242	NL_SET_ERR_MSG(extack, "Missing tunnel key parameters");
d0f6dd8a	243	return -EINVAL;
9d7298cd	244	}
d0f6dd8a AV	245
d0f6dd8a AV	246	parm = nla_data(tb[TCA_TUNNEL_KEY_PARMS]);
0190c1d4 VB	247	err = tcf_idr_check_alloc(tn, &parm->index, a, bind);
	248	if (err < 0)
	249	return err;
	250	exists = err;
d0f6dd8a AV	251	if (exists && bind)
	252	return 0;
	253
	254	switch (parm->t_action) {
	255	case TCA_TUNNEL_KEY_ACT_RELEASE:
	256	break;
	257	case TCA_TUNNEL_KEY_ACT_SET:
80ef0f22 AN	258	if (tb[TCA_TUNNEL_KEY_ENC_KEY_ID]) {
80ef0f22 AN	259	__be32 key32;
d0f6dd8a	260
80ef0f22 AN	261	key32 = nla_get_be32(tb[TCA_TUNNEL_KEY_ENC_KEY_ID]);
	262	key_id = key32_to_tunnel_id(key32);
	263	flags = TUNNEL_KEY;
	264	}
d0f6dd8a	265
80ef0f22	266	flags \|= TUNNEL_CSUM;
86087e17 JB	267	if (tb[TCA_TUNNEL_KEY_NO_CSUM] &&
	268	nla_get_u8(tb[TCA_TUNNEL_KEY_NO_CSUM]))
	269	flags &= ~TUNNEL_CSUM;
	270
75bfbca0 HHZ	271	if (tb[TCA_TUNNEL_KEY_ENC_DST_PORT])
	272	dst_port = nla_get_be16(tb[TCA_TUNNEL_KEY_ENC_DST_PORT]);
	273
0ed5269f SH	274	if (tb[TCA_TUNNEL_KEY_ENC_OPTS]) {
	275	opts_len = tunnel_key_get_opts_len(tb[TCA_TUNNEL_KEY_ENC_OPTS],
	276	extack);
	277	if (opts_len < 0) {
	278	ret = opts_len;
	279	goto err_out;
	280	}
	281	}
	282
07a557f4 OG	283	tos = 0;
	284	if (tb[TCA_TUNNEL_KEY_ENC_TOS])
	285	tos = nla_get_u8(tb[TCA_TUNNEL_KEY_ENC_TOS]);
	286	ttl = 0;
	287	if (tb[TCA_TUNNEL_KEY_ENC_TTL])
	288	ttl = nla_get_u8(tb[TCA_TUNNEL_KEY_ENC_TTL]);
	289
d0f6dd8a AV	290	if (tb[TCA_TUNNEL_KEY_ENC_IPV4_SRC] &&
	291	tb[TCA_TUNNEL_KEY_ENC_IPV4_DST]) {
	292	__be32 saddr;
	293	__be32 daddr;
	294
	295	saddr = nla_get_in_addr(tb[TCA_TUNNEL_KEY_ENC_IPV4_SRC]);
	296	daddr = nla_get_in_addr(tb[TCA_TUNNEL_KEY_ENC_IPV4_DST]);
	297
07a557f4	298	metadata = __ip_tun_set_dst(saddr, daddr, tos, ttl,
86087e17	299	dst_port, flags,
0ed5269f	300	key_id, opts_len);
d0f6dd8a AV	301	} else if (tb[TCA_TUNNEL_KEY_ENC_IPV6_SRC] &&
	302	tb[TCA_TUNNEL_KEY_ENC_IPV6_DST]) {
	303	struct in6_addr saddr;
	304	struct in6_addr daddr;
	305
	306	saddr = nla_get_in6_addr(tb[TCA_TUNNEL_KEY_ENC_IPV6_SRC]);
	307	daddr = nla_get_in6_addr(tb[TCA_TUNNEL_KEY_ENC_IPV6_DST]);
	308
07a557f4	309	metadata = __ipv6_tun_set_dst(&saddr, &daddr, tos, ttl, dst_port,
86087e17	310	0, flags,
75bfbca0	311	key_id, 0);
a1165b59	312	} else {
9d7298cd	313	NL_SET_ERR_MSG(extack, "Missing either ipv4 or ipv6 src and dst");
a1165b59 SH	314	ret = -EINVAL;
a1165b59 SH	315	goto err_out;
d0f6dd8a AV	316	}
	317
	318	if (!metadata) {
9d7298cd	319	NL_SET_ERR_MSG(extack, "Cannot allocate tunnel metadata dst");
a1165b59	320	ret = -ENOMEM;
d0f6dd8a AV	321	goto err_out;
	322	}
	323
0ed5269f SH	324	if (opts_len) {
	325	ret = tunnel_key_opts_set(tb[TCA_TUNNEL_KEY_ENC_OPTS],
	326	&metadata->u.tun_info,
	327	opts_len, extack);
	328	if (ret < 0)
ee28bb56	329	goto release_tun_meta;
0ed5269f SH	330	}
0ed5269f SH	331
d0f6dd8a AV	332	metadata->u.tun_info.mode \|= IP_TUNNEL_INFO_TX;
	333	break;
	334	default:
9d7298cd	335	NL_SET_ERR_MSG(extack, "Unknown tunnel key action");
51d4740f	336	ret = -EINVAL;
d0f6dd8a AV	337	goto err_out;
	338	}
	339
	340	if (!exists) {
65a206c0 CM	341	ret = tcf_idr_create(tn, parm->index, est, a,
65a206c0 CM	342	&act_tunnel_key_ops, bind, true);
9d7298cd SH	343	if (ret) {
9d7298cd SH	344	NL_SET_ERR_MSG(extack, "Cannot create TC IDR");
ee28bb56	345	goto release_tun_meta;
9d7298cd	346	}
d0f6dd8a AV	347
d0f6dd8a AV	348	ret = ACT_P_CREATED;
4e8ddd7f	349	} else if (!ovr) {
4e8ddd7f	350	NL_SET_ERR_MSG(extack, "TC IDR already exists");
ee28bb56 DC	351	ret = -EEXIST;
ee28bb56 DC	352	goto release_tun_meta;
d0f6dd8a AV	353	}
	354
	355	t = to_tunnel_key(*a);
	356
d0f6dd8a AV	357	params_new = kzalloc(sizeof(*params_new), GFP_KERNEL);
d0f6dd8a AV	358	if (unlikely(!params_new)) {
9d7298cd	359	NL_SET_ERR_MSG(extack, "Cannot allocate tunnel key parameters");
ee28bb56 DC	360	ret = -ENOMEM;
	361	exists = true;
	362	goto release_tun_meta;
d0f6dd8a	363	}
d0f6dd8a AV	364	params_new->tcft_action = parm->t_action;
	365	params_new->tcft_enc_metadata = metadata;
	366
653cd284	367	spin_lock_bh(&t->tcf_lock);
729e0126 VB	368	t->tcf_action = parm->action;
	369	rcu_swap_protected(t->params, params_new,
	370	lockdep_is_held(&t->tcf_lock));
653cd284	371	spin_unlock_bh(&t->tcf_lock);
9174c3df	372	tunnel_key_release_params(params_new);
d0f6dd8a AV	373
d0f6dd8a AV	374	if (ret == ACT_P_CREATED)
65a206c0	375	tcf_idr_insert(tn, *a);
d0f6dd8a AV	376
	377	return ret;
	378
ee28bb56 DC	379	release_tun_meta:
	380	dst_release(&metadata->dst);
	381
d0f6dd8a AV	382	err_out:
d0f6dd8a AV	383	if (exists)
65a206c0	384	tcf_idr_release(*a, bind);
0190c1d4 VB	385	else
0190c1d4 VB	386	tcf_idr_cleanup(tn, parm->index);
d0f6dd8a AV	387	return ret;
	388	}
	389
9a63b255	390	static void tunnel_key_release(struct tc_action *a)
d0f6dd8a AV	391	{
	392	struct tcf_tunnel_key *t = to_tunnel_key(a);
	393	struct tcf_tunnel_key_params *params;
	394
07c0f09e	395	params = rcu_dereference_protected(t->params, 1);
9174c3df	396	tunnel_key_release_params(params);
d0f6dd8a AV	397	}
d0f6dd8a AV	398
0ed5269f SH	399	static int tunnel_key_geneve_opts_dump(struct sk_buff *skb,
	400	const struct ip_tunnel_info *info)
	401	{
	402	int len = info->options_len;
	403	u8 src = (u8 )(info + 1);
	404	struct nlattr *start;
	405
	406	start = nla_nest_start(skb, TCA_TUNNEL_KEY_ENC_OPTS_GENEVE);
	407	if (!start)
	408	return -EMSGSIZE;
	409
	410	while (len > 0) {
	411	struct geneve_opt opt = (struct geneve_opt )src;
	412
	413	if (nla_put_be16(skb, TCA_TUNNEL_KEY_ENC_OPT_GENEVE_CLASS,
	414	opt->opt_class) \|\|
	415	nla_put_u8(skb, TCA_TUNNEL_KEY_ENC_OPT_GENEVE_TYPE,
	416	opt->type) \|\|
	417	nla_put(skb, TCA_TUNNEL_KEY_ENC_OPT_GENEVE_DATA,
a162c351 CW	418	opt->length * 4, opt + 1)) {
a162c351 CW	419	nla_nest_cancel(skb, start);
0ed5269f	420	return -EMSGSIZE;
a162c351	421	}
0ed5269f SH	422
	423	len -= sizeof(struct geneve_opt) + opt->length * 4;
	424	src += sizeof(struct geneve_opt) + opt->length * 4;
	425	}
	426
	427	nla_nest_end(skb, start);
	428	return 0;
	429	}
	430
	431	static int tunnel_key_opts_dump(struct sk_buff *skb,
	432	const struct ip_tunnel_info *info)
	433	{
	434	struct nlattr *start;
a162c351	435	int err = -EINVAL;
0ed5269f SH	436
	437	if (!info->options_len)
	438	return 0;
	439
	440	start = nla_nest_start(skb, TCA_TUNNEL_KEY_ENC_OPTS);
	441	if (!start)
	442	return -EMSGSIZE;
	443
	444	if (info->key.tun_flags & TUNNEL_GENEVE_OPT) {
	445	err = tunnel_key_geneve_opts_dump(skb, info);
	446	if (err)
a162c351	447	goto err_out;
0ed5269f	448	} else {
a162c351 CW	449	err_out:
	450	nla_nest_cancel(skb, start);
	451	return err;
0ed5269f SH	452	}
	453
	454	nla_nest_end(skb, start);
	455	return 0;
	456	}
	457
d0f6dd8a AV	458	static int tunnel_key_dump_addresses(struct sk_buff *skb,
	459	const struct ip_tunnel_info *info)
	460	{
	461	unsigned short family = ip_tunnel_info_af(info);
	462
	463	if (family == AF_INET) {
	464	__be32 saddr = info->key.u.ipv4.src;
	465	__be32 daddr = info->key.u.ipv4.dst;
	466
	467	if (!nla_put_in_addr(skb, TCA_TUNNEL_KEY_ENC_IPV4_SRC, saddr) &&
	468	!nla_put_in_addr(skb, TCA_TUNNEL_KEY_ENC_IPV4_DST, daddr))
	469	return 0;
	470	}
	471
	472	if (family == AF_INET6) {
	473	const struct in6_addr *saddr6 = &info->key.u.ipv6.src;
	474	const struct in6_addr *daddr6 = &info->key.u.ipv6.dst;
	475
	476	if (!nla_put_in6_addr(skb,
	477	TCA_TUNNEL_KEY_ENC_IPV6_SRC, saddr6) &&
	478	!nla_put_in6_addr(skb,
	479	TCA_TUNNEL_KEY_ENC_IPV6_DST, daddr6))
	480	return 0;
	481	}
	482
	483	return -EINVAL;
	484	}
	485
	486	static int tunnel_key_dump(struct sk_buff skb, struct tc_action a,
	487	int bind, int ref)
	488	{
	489	unsigned char *b = skb_tail_pointer(skb);
	490	struct tcf_tunnel_key *t = to_tunnel_key(a);
	491	struct tcf_tunnel_key_params *params;
	492	struct tc_tunnel_key opt = {
	493	.index = t->tcf_index,
036bb443 VB	494	.refcnt = refcount_read(&t->tcf_refcnt) - ref,
036bb443 VB	495	.bindcnt = atomic_read(&t->tcf_bindcnt) - bind,
d0f6dd8a AV	496	};
d0f6dd8a AV	497	struct tcf_t tm;
d0f6dd8a	498
653cd284	499	spin_lock_bh(&t->tcf_lock);
729e0126 VB	500	params = rcu_dereference_protected(t->params,
	501	lockdep_is_held(&t->tcf_lock));
	502	opt.action = t->tcf_action;
d0f6dd8a	503	opt.t_action = params->tcft_action;
d0f6dd8a AV	504
	505	if (nla_put(skb, TCA_TUNNEL_KEY_PARMS, sizeof(opt), &opt))
	506	goto nla_put_failure;
	507
	508	if (params->tcft_action == TCA_TUNNEL_KEY_ACT_SET) {
0ed5269f SH	509	struct ip_tunnel_info *info =
	510	&params->tcft_enc_metadata->u.tun_info;
	511	struct ip_tunnel_key *key = &info->key;
d0f6dd8a AV	512	__be32 key_id = tunnel_id_to_key32(key->tun_id);
d0f6dd8a AV	513
80ef0f22 AN	514	if (((key->tun_flags & TUNNEL_KEY) &&
80ef0f22 AN	515	nla_put_be32(skb, TCA_TUNNEL_KEY_ENC_KEY_ID, key_id)) \|\|
d0f6dd8a	516	tunnel_key_dump_addresses(skb,
75bfbca0	517	&params->tcft_enc_metadata->u.tun_info) \|\|
1c25324c AN	518	(key->tp_dst &&
	519	nla_put_be16(skb, TCA_TUNNEL_KEY_ENC_DST_PORT,
	520	key->tp_dst)) \|\|
86087e17	521	nla_put_u8(skb, TCA_TUNNEL_KEY_NO_CSUM,
0ed5269f SH	522	!(key->tun_flags & TUNNEL_CSUM)) \|\|
0ed5269f SH	523	tunnel_key_opts_dump(skb, info))
d0f6dd8a	524	goto nla_put_failure;
07a557f4 OG	525
	526	if (key->tos && nla_put_u8(skb, TCA_TUNNEL_KEY_ENC_TOS, key->tos))
	527	goto nla_put_failure;
	528
	529	if (key->ttl && nla_put_u8(skb, TCA_TUNNEL_KEY_ENC_TTL, key->ttl))
	530	goto nla_put_failure;
d0f6dd8a AV	531	}
	532
	533	tcf_tm_dump(&tm, &t->tcf_tm);
	534	if (nla_put_64bit(skb, TCA_TUNNEL_KEY_TM, sizeof(tm),
	535	&tm, TCA_TUNNEL_KEY_PAD))
	536	goto nla_put_failure;
653cd284	537	spin_unlock_bh(&t->tcf_lock);
d0f6dd8a	538
07c0f09e	539	return skb->len;
d0f6dd8a AV	540
d0f6dd8a AV	541	nla_put_failure:
653cd284	542	spin_unlock_bh(&t->tcf_lock);
d0f6dd8a	543	nlmsg_trim(skb, b);
07c0f09e	544	return -1;
d0f6dd8a AV	545	}
	546
	547	static int tunnel_key_walker(struct net net, struct sk_buff skb,
	548	struct netlink_callback *cb, int type,
41780105 AA	549	const struct tc_action_ops *ops,
41780105 AA	550	struct netlink_ext_ack *extack)
d0f6dd8a AV	551	{
	552	struct tc_action_net *tn = net_generic(net, tunnel_key_net_id);
	553
b3620145	554	return tcf_generic_walker(tn, skb, cb, type, ops, extack);
d0f6dd8a AV	555	}
d0f6dd8a AV	556
f061b48c	557	static int tunnel_key_search(struct net net, struct tc_action *a, u32 index)
d0f6dd8a AV	558	{
	559	struct tc_action_net *tn = net_generic(net, tunnel_key_net_id);
	560
65a206c0	561	return tcf_idr_search(tn, a, index);
d0f6dd8a AV	562	}
	563
	564	static struct tc_action_ops act_tunnel_key_ops = {
	565	.kind = "tunnel_key",
eddd2cf1	566	.id = TCA_ID_TUNNEL_KEY,
d0f6dd8a AV	567	.owner = THIS_MODULE,
	568	.act = tunnel_key_act,
	569	.dump = tunnel_key_dump,
	570	.init = tunnel_key_init,
	571	.cleanup = tunnel_key_release,
	572	.walk = tunnel_key_walker,
	573	.lookup = tunnel_key_search,
	574	.size = sizeof(struct tcf_tunnel_key),
	575	};
	576
	577	static __net_init int tunnel_key_init_net(struct net *net)
	578	{
	579	struct tc_action_net *tn = net_generic(net, tunnel_key_net_id);
	580
c7e460ce	581	return tc_action_net_init(tn, &act_tunnel_key_ops);
d0f6dd8a AV	582	}
d0f6dd8a AV	583
039af9c6	584	static void __net_exit tunnel_key_exit_net(struct list_head *net_list)
d0f6dd8a	585	{
039af9c6	586	tc_action_net_exit(net_list, tunnel_key_net_id);
d0f6dd8a AV	587	}
	588
	589	static struct pernet_operations tunnel_key_net_ops = {
	590	.init = tunnel_key_init_net,
039af9c6	591	.exit_batch = tunnel_key_exit_net,
d0f6dd8a AV	592	.id = &tunnel_key_net_id,
	593	.size = sizeof(struct tc_action_net),
	594	};
	595
	596	static int __init tunnel_key_init_module(void)
	597	{
	598	return tcf_register_action(&act_tunnel_key_ops, &tunnel_key_net_ops);
	599	}
	600
	601	static void __exit tunnel_key_cleanup_module(void)
	602	{
	603	tcf_unregister_action(&act_tunnel_key_ops, &tunnel_key_net_ops);
	604	}
	605
	606	module_init(tunnel_key_init_module);
	607	module_exit(tunnel_key_cleanup_module);
	608
	609	MODULE_AUTHOR("Amir Vadai <amir@vadai.me>");
	610	MODULE_DESCRIPTION("ip tunnel manipulation actions");
	611	MODULE_LICENSE("GPL v2");