[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 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_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;
	int opts_len = 0;
	__be64 key_id;
	__be16 flags;
	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]) {
			NL_SET_ERR_MSG(extack, "Missing tunnel 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_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 err_out;
		}

		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 err_out;
		}

		ret = ACT_P_CREATED;
	} else if (!ovr) {
		tcf_idr_release(*a, bind);
		NL_SET_ERR_MSG(extack, "TC IDR already exists");
		return -EEXIST;
	}

	t = to_tunnel_key(*a);

	ASSERT_RTNL();
	params_new = kzalloc(sizeof(*params_new), GFP_KERNEL);
	if (unlikely(!params_new)) {
		tcf_idr_release(*a, bind);
		NL_SET_ERR_MSG(extack, "Cannot allocate tunnel key parameters");
		return -ENOMEM;
	}

	params_old = rtnl_dereference(t->params);

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

		kfree_rcu(params, rcu);
	}
}

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))
			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;

	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)
			return err;
	} else {
		return -EINVAL;
	}

	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,
		.action   = t->tcf_action,
	};
	struct tcf_t tm;

	params = rtnl_dereference(t->params);

	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 (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)) ||
		    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;

	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 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 netlink_ext_ack *extack)
{
	struct tc_action_net *tn = net_generic(net, tunnel_key_net_id);

	return tcf_idr_search(tn, a, index);
}

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

	return tcf_idr_delete_index(tn, 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,
	.delete		=	tunnel_key_delete,
	.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	};
	199
	200	static int tunnel_key_init(struct net net, struct nlattr nla,
	201	struct nlattr est, struct tc_action *a,
789871bb VB	202	int ovr, int bind, bool rtnl_held,
789871bb VB	203	struct netlink_ext_ack *extack)
d0f6dd8a AV	204	{
	205	struct tc_action_net *tn = net_generic(net, tunnel_key_net_id);
	206	struct nlattr *tb[TCA_TUNNEL_KEY_MAX + 1];
	207	struct tcf_tunnel_key_params *params_old;
	208	struct tcf_tunnel_key_params *params_new;
	209	struct metadata_dst *metadata = NULL;
	210	struct tc_tunnel_key *parm;
	211	struct tcf_tunnel_key *t;
	212	bool exists = false;
75bfbca0	213	__be16 dst_port = 0;
0ed5269f	214	int opts_len = 0;
d0f6dd8a	215	__be64 key_id;
86087e17	216	__be16 flags;
07a557f4	217	u8 tos, ttl;
d0f6dd8a AV	218	int ret = 0;
	219	int err;
	220
9d7298cd SH	221	if (!nla) {
9d7298cd SH	222	NL_SET_ERR_MSG(extack, "Tunnel requires attributes to be passed");
d0f6dd8a	223	return -EINVAL;
9d7298cd	224	}
d0f6dd8a	225
fceb6435	226	err = nla_parse_nested(tb, TCA_TUNNEL_KEY_MAX, nla, tunnel_key_policy,
9d7298cd SH	227	extack);
	228	if (err < 0) {
	229	NL_SET_ERR_MSG(extack, "Failed to parse nested tunnel key attributes");
d0f6dd8a	230	return err;
9d7298cd	231	}
d0f6dd8a	232
9d7298cd SH	233	if (!tb[TCA_TUNNEL_KEY_PARMS]) {
9d7298cd SH	234	NL_SET_ERR_MSG(extack, "Missing tunnel key parameters");
d0f6dd8a	235	return -EINVAL;
9d7298cd	236	}
d0f6dd8a AV	237
d0f6dd8a AV	238	parm = nla_data(tb[TCA_TUNNEL_KEY_PARMS]);
0190c1d4 VB	239	err = tcf_idr_check_alloc(tn, &parm->index, a, bind);
	240	if (err < 0)
	241	return err;
	242	exists = err;
d0f6dd8a AV	243	if (exists && bind)
	244	return 0;
	245
	246	switch (parm->t_action) {
	247	case TCA_TUNNEL_KEY_ACT_RELEASE:
	248	break;
	249	case TCA_TUNNEL_KEY_ACT_SET:
	250	if (!tb[TCA_TUNNEL_KEY_ENC_KEY_ID]) {
9d7298cd	251	NL_SET_ERR_MSG(extack, "Missing tunnel key id");
d0f6dd8a AV	252	ret = -EINVAL;
	253	goto err_out;
	254	}
	255
	256	key_id = key32_to_tunnel_id(nla_get_be32(tb[TCA_TUNNEL_KEY_ENC_KEY_ID]));
	257
86087e17 JB	258	flags = TUNNEL_KEY \| TUNNEL_CSUM;
	259	if (tb[TCA_TUNNEL_KEY_NO_CSUM] &&
	260	nla_get_u8(tb[TCA_TUNNEL_KEY_NO_CSUM]))
	261	flags &= ~TUNNEL_CSUM;
	262
75bfbca0 HHZ	263	if (tb[TCA_TUNNEL_KEY_ENC_DST_PORT])
	264	dst_port = nla_get_be16(tb[TCA_TUNNEL_KEY_ENC_DST_PORT]);
	265
0ed5269f SH	266	if (tb[TCA_TUNNEL_KEY_ENC_OPTS]) {
	267	opts_len = tunnel_key_get_opts_len(tb[TCA_TUNNEL_KEY_ENC_OPTS],
	268	extack);
	269	if (opts_len < 0) {
	270	ret = opts_len;
	271	goto err_out;
	272	}
	273	}
	274
07a557f4 OG	275	tos = 0;
	276	if (tb[TCA_TUNNEL_KEY_ENC_TOS])
	277	tos = nla_get_u8(tb[TCA_TUNNEL_KEY_ENC_TOS]);
	278	ttl = 0;
	279	if (tb[TCA_TUNNEL_KEY_ENC_TTL])
	280	ttl = nla_get_u8(tb[TCA_TUNNEL_KEY_ENC_TTL]);
	281
d0f6dd8a AV	282	if (tb[TCA_TUNNEL_KEY_ENC_IPV4_SRC] &&
	283	tb[TCA_TUNNEL_KEY_ENC_IPV4_DST]) {
	284	__be32 saddr;
	285	__be32 daddr;
	286
	287	saddr = nla_get_in_addr(tb[TCA_TUNNEL_KEY_ENC_IPV4_SRC]);
	288	daddr = nla_get_in_addr(tb[TCA_TUNNEL_KEY_ENC_IPV4_DST]);
	289
07a557f4	290	metadata = __ip_tun_set_dst(saddr, daddr, tos, ttl,
86087e17	291	dst_port, flags,
0ed5269f	292	key_id, opts_len);
d0f6dd8a AV	293	} else if (tb[TCA_TUNNEL_KEY_ENC_IPV6_SRC] &&
	294	tb[TCA_TUNNEL_KEY_ENC_IPV6_DST]) {
	295	struct in6_addr saddr;
	296	struct in6_addr daddr;
	297
	298	saddr = nla_get_in6_addr(tb[TCA_TUNNEL_KEY_ENC_IPV6_SRC]);
	299	daddr = nla_get_in6_addr(tb[TCA_TUNNEL_KEY_ENC_IPV6_DST]);
	300
07a557f4	301	metadata = __ipv6_tun_set_dst(&saddr, &daddr, tos, ttl, dst_port,
86087e17	302	0, flags,
75bfbca0	303	key_id, 0);
a1165b59	304	} else {
9d7298cd	305	NL_SET_ERR_MSG(extack, "Missing either ipv4 or ipv6 src and dst");
a1165b59 SH	306	ret = -EINVAL;
a1165b59 SH	307	goto err_out;
d0f6dd8a AV	308	}
	309
	310	if (!metadata) {
9d7298cd	311	NL_SET_ERR_MSG(extack, "Cannot allocate tunnel metadata dst");
a1165b59	312	ret = -ENOMEM;
d0f6dd8a AV	313	goto err_out;
	314	}
	315
0ed5269f SH	316	if (opts_len) {
	317	ret = tunnel_key_opts_set(tb[TCA_TUNNEL_KEY_ENC_OPTS],
	318	&metadata->u.tun_info,
	319	opts_len, extack);
	320	if (ret < 0)
	321	goto err_out;
	322	}
	323
d0f6dd8a AV	324	metadata->u.tun_info.mode \|= IP_TUNNEL_INFO_TX;
	325	break;
	326	default:
9d7298cd	327	NL_SET_ERR_MSG(extack, "Unknown tunnel key action");
51d4740f	328	ret = -EINVAL;
d0f6dd8a AV	329	goto err_out;
	330	}
	331
	332	if (!exists) {
65a206c0 CM	333	ret = tcf_idr_create(tn, parm->index, est, a,
65a206c0 CM	334	&act_tunnel_key_ops, bind, true);
9d7298cd SH	335	if (ret) {
9d7298cd SH	336	NL_SET_ERR_MSG(extack, "Cannot create TC IDR");
0190c1d4	337	goto err_out;
9d7298cd	338	}
d0f6dd8a AV	339
d0f6dd8a AV	340	ret = ACT_P_CREATED;
4e8ddd7f	341	} else if (!ovr) {
65a206c0	342	tcf_idr_release(*a, bind);
4e8ddd7f VB	343	NL_SET_ERR_MSG(extack, "TC IDR already exists");
4e8ddd7f VB	344	return -EEXIST;
d0f6dd8a AV	345	}
	346
	347	t = to_tunnel_key(*a);
	348
	349	ASSERT_RTNL();
	350	params_new = kzalloc(sizeof(*params_new), GFP_KERNEL);
	351	if (unlikely(!params_new)) {
4e8ddd7f	352	tcf_idr_release(*a, bind);
9d7298cd	353	NL_SET_ERR_MSG(extack, "Cannot allocate tunnel key parameters");
d0f6dd8a AV	354	return -ENOMEM;
	355	}
	356
	357	params_old = rtnl_dereference(t->params);
	358
38230a3e	359	t->tcf_action = parm->action;
d0f6dd8a AV	360	params_new->tcft_action = parm->t_action;
	361	params_new->tcft_enc_metadata = metadata;
	362
	363	rcu_assign_pointer(t->params, params_new);
	364
	365	if (params_old)
	366	kfree_rcu(params_old, rcu);
	367
	368	if (ret == ACT_P_CREATED)
65a206c0	369	tcf_idr_insert(tn, *a);
d0f6dd8a AV	370
	371	return ret;
	372
	373	err_out:
	374	if (exists)
65a206c0	375	tcf_idr_release(*a, bind);
0190c1d4 VB	376	else
0190c1d4 VB	377	tcf_idr_cleanup(tn, parm->index);
d0f6dd8a AV	378	return ret;
	379	}
	380
9a63b255	381	static void tunnel_key_release(struct tc_action *a)
d0f6dd8a AV	382	{
	383	struct tcf_tunnel_key *t = to_tunnel_key(a);
	384	struct tcf_tunnel_key_params *params;
	385
07c0f09e	386	params = rcu_dereference_protected(t->params, 1);
abdadd3c DC	387	if (params) {
	388	if (params->tcft_action == TCA_TUNNEL_KEY_ACT_SET)
	389	dst_release(&params->tcft_enc_metadata->dst);
d0f6dd8a	390
abdadd3c DC	391	kfree_rcu(params, rcu);
abdadd3c DC	392	}
d0f6dd8a AV	393	}
d0f6dd8a AV	394
0ed5269f SH	395	static int tunnel_key_geneve_opts_dump(struct sk_buff *skb,
	396	const struct ip_tunnel_info *info)
	397	{
	398	int len = info->options_len;
	399	u8 src = (u8 )(info + 1);
	400	struct nlattr *start;
	401
	402	start = nla_nest_start(skb, TCA_TUNNEL_KEY_ENC_OPTS_GENEVE);
	403	if (!start)
	404	return -EMSGSIZE;
	405
	406	while (len > 0) {
	407	struct geneve_opt opt = (struct geneve_opt )src;
	408
	409	if (nla_put_be16(skb, TCA_TUNNEL_KEY_ENC_OPT_GENEVE_CLASS,
	410	opt->opt_class) \|\|
	411	nla_put_u8(skb, TCA_TUNNEL_KEY_ENC_OPT_GENEVE_TYPE,
	412	opt->type) \|\|
	413	nla_put(skb, TCA_TUNNEL_KEY_ENC_OPT_GENEVE_DATA,
	414	opt->length * 4, opt + 1))
	415	return -EMSGSIZE;
	416
	417	len -= sizeof(struct geneve_opt) + opt->length * 4;
	418	src += sizeof(struct geneve_opt) + opt->length * 4;
	419	}
	420
	421	nla_nest_end(skb, start);
	422	return 0;
	423	}
	424
	425	static int tunnel_key_opts_dump(struct sk_buff *skb,
	426	const struct ip_tunnel_info *info)
	427	{
	428	struct nlattr *start;
	429	int err;
	430
	431	if (!info->options_len)
	432	return 0;
	433
	434	start = nla_nest_start(skb, TCA_TUNNEL_KEY_ENC_OPTS);
	435	if (!start)
	436	return -EMSGSIZE;
	437
	438	if (info->key.tun_flags & TUNNEL_GENEVE_OPT) {
	439	err = tunnel_key_geneve_opts_dump(skb, info);
	440	if (err)
	441	return err;
	442	} else {
	443	return -EINVAL;
	444	}
	445
	446	nla_nest_end(skb, start);
	447	return 0;
	448	}
	449
d0f6dd8a AV	450	static int tunnel_key_dump_addresses(struct sk_buff *skb,
	451	const struct ip_tunnel_info *info)
	452	{
	453	unsigned short family = ip_tunnel_info_af(info);
	454
	455	if (family == AF_INET) {
	456	__be32 saddr = info->key.u.ipv4.src;
	457	__be32 daddr = info->key.u.ipv4.dst;
	458
	459	if (!nla_put_in_addr(skb, TCA_TUNNEL_KEY_ENC_IPV4_SRC, saddr) &&
	460	!nla_put_in_addr(skb, TCA_TUNNEL_KEY_ENC_IPV4_DST, daddr))
	461	return 0;
	462	}
	463
	464	if (family == AF_INET6) {
	465	const struct in6_addr *saddr6 = &info->key.u.ipv6.src;
	466	const struct in6_addr *daddr6 = &info->key.u.ipv6.dst;
	467
	468	if (!nla_put_in6_addr(skb,
	469	TCA_TUNNEL_KEY_ENC_IPV6_SRC, saddr6) &&
	470	!nla_put_in6_addr(skb,
	471	TCA_TUNNEL_KEY_ENC_IPV6_DST, daddr6))
	472	return 0;
	473	}
	474
	475	return -EINVAL;
	476	}
	477
	478	static int tunnel_key_dump(struct sk_buff skb, struct tc_action a,
	479	int bind, int ref)
	480	{
	481	unsigned char *b = skb_tail_pointer(skb);
	482	struct tcf_tunnel_key *t = to_tunnel_key(a);
	483	struct tcf_tunnel_key_params *params;
	484	struct tc_tunnel_key opt = {
	485	.index = t->tcf_index,
036bb443 VB	486	.refcnt = refcount_read(&t->tcf_refcnt) - ref,
036bb443 VB	487	.bindcnt = atomic_read(&t->tcf_bindcnt) - bind,
38230a3e	488	.action = t->tcf_action,
d0f6dd8a AV	489	};
d0f6dd8a AV	490	struct tcf_t tm;
d0f6dd8a	491
07c0f09e	492	params = rtnl_dereference(t->params);
d0f6dd8a AV	493
d0f6dd8a AV	494	opt.t_action = params->tcft_action;
d0f6dd8a AV	495
	496	if (nla_put(skb, TCA_TUNNEL_KEY_PARMS, sizeof(opt), &opt))
	497	goto nla_put_failure;
	498
	499	if (params->tcft_action == TCA_TUNNEL_KEY_ACT_SET) {
0ed5269f SH	500	struct ip_tunnel_info *info =
	501	&params->tcft_enc_metadata->u.tun_info;
	502	struct ip_tunnel_key *key = &info->key;
d0f6dd8a AV	503	__be32 key_id = tunnel_id_to_key32(key->tun_id);
	504
	505	if (nla_put_be32(skb, TCA_TUNNEL_KEY_ENC_KEY_ID, key_id) \|\|
	506	tunnel_key_dump_addresses(skb,
75bfbca0	507	&params->tcft_enc_metadata->u.tun_info) \|\|
86087e17 JB	508	nla_put_be16(skb, TCA_TUNNEL_KEY_ENC_DST_PORT, key->tp_dst) \|\|
86087e17 JB	509	nla_put_u8(skb, TCA_TUNNEL_KEY_NO_CSUM,
0ed5269f SH	510	!(key->tun_flags & TUNNEL_CSUM)) \|\|
0ed5269f SH	511	tunnel_key_opts_dump(skb, info))
d0f6dd8a	512	goto nla_put_failure;
07a557f4 OG	513
	514	if (key->tos && nla_put_u8(skb, TCA_TUNNEL_KEY_ENC_TOS, key->tos))
	515	goto nla_put_failure;
	516
	517	if (key->ttl && nla_put_u8(skb, TCA_TUNNEL_KEY_ENC_TTL, key->ttl))
	518	goto nla_put_failure;
d0f6dd8a AV	519	}
	520
	521	tcf_tm_dump(&tm, &t->tcf_tm);
	522	if (nla_put_64bit(skb, TCA_TUNNEL_KEY_TM, sizeof(tm),
	523	&tm, TCA_TUNNEL_KEY_PAD))
	524	goto nla_put_failure;
	525
07c0f09e	526	return skb->len;
d0f6dd8a AV	527
	528	nla_put_failure:
	529	nlmsg_trim(skb, b);
07c0f09e	530	return -1;
d0f6dd8a AV	531	}
	532
	533	static int tunnel_key_walker(struct net net, struct sk_buff skb,
	534	struct netlink_callback *cb, int type,
41780105 AA	535	const struct tc_action_ops *ops,
41780105 AA	536	struct netlink_ext_ack *extack)
d0f6dd8a AV	537	{
	538	struct tc_action_net *tn = net_generic(net, tunnel_key_net_id);
	539
b3620145	540	return tcf_generic_walker(tn, skb, cb, type, ops, extack);
d0f6dd8a AV	541	}
d0f6dd8a AV	542
331a9295 AA	543	static int tunnel_key_search(struct net net, struct tc_action *a, u32 index,
331a9295 AA	544	struct netlink_ext_ack *extack)
d0f6dd8a AV	545	{
	546	struct tc_action_net *tn = net_generic(net, tunnel_key_net_id);
	547
65a206c0	548	return tcf_idr_search(tn, a, index);
d0f6dd8a AV	549	}
d0f6dd8a AV	550
b409074e VB	551	static int tunnel_key_delete(struct net *net, u32 index)
	552	{
	553	struct tc_action_net *tn = net_generic(net, tunnel_key_net_id);
	554
	555	return tcf_idr_delete_index(tn, index);
	556	}
	557
d0f6dd8a AV	558	static struct tc_action_ops act_tunnel_key_ops = {
	559	.kind = "tunnel_key",
	560	.type = TCA_ACT_TUNNEL_KEY,
	561	.owner = THIS_MODULE,
	562	.act = tunnel_key_act,
	563	.dump = tunnel_key_dump,
	564	.init = tunnel_key_init,
	565	.cleanup = tunnel_key_release,
	566	.walk = tunnel_key_walker,
	567	.lookup = tunnel_key_search,
b409074e	568	.delete = tunnel_key_delete,
d0f6dd8a AV	569	.size = sizeof(struct tcf_tunnel_key),
	570	};
	571
	572	static __net_init int tunnel_key_init_net(struct net *net)
	573	{
	574	struct tc_action_net *tn = net_generic(net, tunnel_key_net_id);
	575
c7e460ce	576	return tc_action_net_init(tn, &act_tunnel_key_ops);
d0f6dd8a AV	577	}
d0f6dd8a AV	578
039af9c6	579	static void __net_exit tunnel_key_exit_net(struct list_head *net_list)
d0f6dd8a	580	{
039af9c6	581	tc_action_net_exit(net_list, tunnel_key_net_id);
d0f6dd8a AV	582	}
	583
	584	static struct pernet_operations tunnel_key_net_ops = {
	585	.init = tunnel_key_init_net,
039af9c6	586	.exit_batch = tunnel_key_exit_net,
d0f6dd8a AV	587	.id = &tunnel_key_net_id,
	588	.size = sizeof(struct tc_action_net),
	589	};
	590
	591	static int __init tunnel_key_init_module(void)
	592	{
	593	return tcf_register_action(&act_tunnel_key_ops, &tunnel_key_net_ops);
	594	}
	595
	596	static void __exit tunnel_key_cleanup_module(void)
	597	{
	598	tcf_unregister_action(&act_tunnel_key_ops, &tunnel_key_net_ops);
	599	}
	600
	601	module_init(tunnel_key_init_module);
	602	module_exit(tunnel_key_cleanup_module);
	603
	604	MODULE_AUTHOR("Amir Vadai <amir@vadai.me>");
	605	MODULE_DESCRIPTION("ip tunnel manipulation actions");
	606	MODULE_LICENSE("GPL v2");