[linux-2.6-block.git] / net / sched / act_tunnel_key.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Copyright (c) 2016, Amir Vadai <amir@vadai.me>
 * Copyright (c) 2016, Mellanox Technologies. All rights reserved.
 */

#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 <net/pkt_cls.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_deprecated(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_deprecated(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 tcf_proto *tp,
			   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 tcf_chain *goto_ch = 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_deprecated(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;
		}

#ifdef CONFIG_DST_CACHE
		ret = dst_cache_init(&metadata->u.tun_info.dst_cache, GFP_KERNEL);
		if (ret)
			goto release_tun_meta;
#endif

		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;
	}

	err = tcf_action_check_ctrlact(parm->action, tp, &goto_ch, extack);
	if (err < 0) {
		ret = err;
		exists = true;
		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 put_chain;
	}
	params_new->tcft_action = parm->t_action;
	params_new->tcft_enc_metadata = metadata;

	spin_lock_bh(&t->tcf_lock);
	goto_ch = tcf_action_set_ctrlact(*a, parm->action, goto_ch);
	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 (goto_ch)
		tcf_chain_put_by_act(goto_ch);

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

	return ret;

put_chain:
	if (goto_ch)
		tcf_chain_put_by_act(goto_ch);

release_tun_meta:
	if (metadata)
		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_noflag(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_noflag(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
2874c5fd	1	// SPDX-License-Identifier: GPL-2.0-or-later
d0f6dd8a AV	2	/*
	3	* Copyright (c) 2016, Amir Vadai <amir@vadai.me>
	4	* Copyright (c) 2016, Mellanox Technologies. All rights reserved.
d0f6dd8a AV	5	*/
	6
	7	#include <linux/module.h>
	8	#include <linux/init.h>
	9	#include <linux/kernel.h>
	10	#include <linux/skbuff.h>
	11	#include <linux/rtnetlink.h>
0ed5269f	12	#include <net/geneve.h>
d0f6dd8a AV	13	#include <net/netlink.h>
	14	#include <net/pkt_sched.h>
	15	#include <net/dst.h>
e5fdabac	16	#include <net/pkt_cls.h>
d0f6dd8a AV	17
	18	#include <linux/tc_act/tc_tunnel_key.h>
	19	#include <net/tc_act/tc_tunnel_key.h>
	20
c7d03a00	21	static unsigned int tunnel_key_net_id;
d0f6dd8a AV	22	static struct tc_action_ops act_tunnel_key_ops;
	23
	24	static int tunnel_key_act(struct sk_buff skb, const struct tc_action a,
	25	struct tcf_result *res)
	26	{
	27	struct tcf_tunnel_key *t = to_tunnel_key(a);
	28	struct tcf_tunnel_key_params *params;
	29	int action;
	30
7fd4b288	31	params = rcu_dereference_bh(t->params);
d0f6dd8a AV	32
	33	tcf_lastuse_update(&t->tcf_tm);
	34	bstats_cpu_update(this_cpu_ptr(t->common.cpu_bstats), skb);
38230a3e	35	action = READ_ONCE(t->tcf_action);
d0f6dd8a AV	36
	37	switch (params->tcft_action) {
	38	case TCA_TUNNEL_KEY_ACT_RELEASE:
	39	skb_dst_drop(skb);
	40	break;
	41	case TCA_TUNNEL_KEY_ACT_SET:
	42	skb_dst_drop(skb);
	43	skb_dst_set(skb, dst_clone(&params->tcft_enc_metadata->dst));
	44	break;
	45	default:
	46	WARN_ONCE(1, "Bad tunnel_key action %d.\n",
	47	params->tcft_action);
	48	break;
	49	}
	50
d0f6dd8a AV	51	return action;
	52	}
	53
0ed5269f SH	54	static const struct nla_policy
	55	enc_opts_policy[TCA_TUNNEL_KEY_ENC_OPTS_MAX + 1] = {
	56	[TCA_TUNNEL_KEY_ENC_OPTS_GENEVE] = { .type = NLA_NESTED },
	57	};
	58
	59	static const struct nla_policy
	60	geneve_opt_policy[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_MAX + 1] = {
	61	[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_CLASS] = { .type = NLA_U16 },
	62	[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_TYPE] = { .type = NLA_U8 },
	63	[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_DATA] = { .type = NLA_BINARY,
	64	.len = 128 },
	65	};
	66
	67	static int
	68	tunnel_key_copy_geneve_opt(const struct nlattr nla, void dst, int dst_len,
	69	struct netlink_ext_ack *extack)
	70	{
	71	struct nlattr *tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_MAX + 1];
	72	int err, data_len, opt_len;
	73	u8 *data;
	74
8cb08174 JB	75	err = nla_parse_nested_deprecated(tb,
	76	TCA_TUNNEL_KEY_ENC_OPT_GENEVE_MAX,
	77	nla, geneve_opt_policy, extack);
0ed5269f SH	78	if (err < 0)
	79	return err;
	80
	81	if (!tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_CLASS] \|\|
	82	!tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_TYPE] \|\|
	83	!tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_DATA]) {
	84	NL_SET_ERR_MSG(extack, "Missing tunnel key geneve option class, type or data");
	85	return -EINVAL;
	86	}
	87
	88	data = nla_data(tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_DATA]);
	89	data_len = nla_len(tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_DATA]);
	90	if (data_len < 4) {
	91	NL_SET_ERR_MSG(extack, "Tunnel key geneve option data is less than 4 bytes long");
	92	return -ERANGE;
	93	}
	94	if (data_len % 4) {
	95	NL_SET_ERR_MSG(extack, "Tunnel key geneve option data is not a multiple of 4 bytes long");
	96	return -ERANGE;
	97	}
	98
	99	opt_len = sizeof(struct geneve_opt) + data_len;
	100	if (dst) {
	101	struct geneve_opt *opt = dst;
	102
	103	WARN_ON(dst_len < opt_len);
	104
	105	opt->opt_class =
	106	nla_get_be16(tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_CLASS]);
	107	opt->type = nla_get_u8(tb[TCA_TUNNEL_KEY_ENC_OPT_GENEVE_TYPE]);
	108	opt->length = data_len / 4; /* length is in units of 4 bytes */
	109	opt->r1 = 0;
	110	opt->r2 = 0;
	111	opt->r3 = 0;
	112
	113	memcpy(opt + 1, data, data_len);
	114	}
	115
	116	return opt_len;
	117	}
	118
	119	static int tunnel_key_copy_opts(const struct nlattr nla, u8 dst,
	120	int dst_len, struct netlink_ext_ack *extack)
	121	{
	122	int err, rem, opt_len, len = nla_len(nla), opts_len = 0;
	123	const struct nlattr attr, head = nla_data(nla);
	124
8cb08174 JB	125	err = nla_validate_deprecated(head, len, TCA_TUNNEL_KEY_ENC_OPTS_MAX,
8cb08174 JB	126	enc_opts_policy, extack);
0ed5269f SH	127	if (err)
	128	return err;
	129
	130	nla_for_each_attr(attr, head, len, rem) {
	131	switch (nla_type(attr)) {
	132	case TCA_TUNNEL_KEY_ENC_OPTS_GENEVE:
	133	opt_len = tunnel_key_copy_geneve_opt(attr, dst,
	134	dst_len, extack);
	135	if (opt_len < 0)
	136	return opt_len;
	137	opts_len += opt_len;
	138	if (dst) {
	139	dst_len -= opt_len;
	140	dst += opt_len;
	141	}
	142	break;
	143	}
	144	}
	145
	146	if (!opts_len) {
	147	NL_SET_ERR_MSG(extack, "Empty list of tunnel options");
	148	return -EINVAL;
	149	}
	150
	151	if (rem > 0) {
	152	NL_SET_ERR_MSG(extack, "Trailing data after parsing tunnel key options attributes");
	153	return -EINVAL;
	154	}
	155
	156	return opts_len;
	157	}
	158
	159	static int tunnel_key_get_opts_len(struct nlattr *nla,
	160	struct netlink_ext_ack *extack)
	161	{
	162	return tunnel_key_copy_opts(nla, NULL, 0, extack);
	163	}
	164
	165	static int tunnel_key_opts_set(struct nlattr nla, struct ip_tunnel_info info,
	166	int opts_len, struct netlink_ext_ack *extack)
	167	{
	168	info->options_len = opts_len;
	169	switch (nla_type(nla_data(nla))) {
	170	case TCA_TUNNEL_KEY_ENC_OPTS_GENEVE:
	171	#if IS_ENABLED(CONFIG_INET)
	172	info->key.tun_flags \|= TUNNEL_GENEVE_OPT;
	173	return tunnel_key_copy_opts(nla, ip_tunnel_info_opts(info),
	174	opts_len, extack);
	175	#else
	176	return -EAFNOSUPPORT;
	177	#endif
	178	default:
	179	NL_SET_ERR_MSG(extack, "Cannot set tunnel options for unknown tunnel type");
	180	return -EINVAL;
	181	}
	182	}
	183
d0f6dd8a AV	184	static const struct nla_policy tunnel_key_policy[TCA_TUNNEL_KEY_MAX + 1] = {
	185	[TCA_TUNNEL_KEY_PARMS] = { .len = sizeof(struct tc_tunnel_key) },
	186	[TCA_TUNNEL_KEY_ENC_IPV4_SRC] = { .type = NLA_U32 },
	187	[TCA_TUNNEL_KEY_ENC_IPV4_DST] = { .type = NLA_U32 },
	188	[TCA_TUNNEL_KEY_ENC_IPV6_SRC] = { .len = sizeof(struct in6_addr) },
	189	[TCA_TUNNEL_KEY_ENC_IPV6_DST] = { .len = sizeof(struct in6_addr) },
	190	[TCA_TUNNEL_KEY_ENC_KEY_ID] = { .type = NLA_U32 },
75bfbca0	191	[TCA_TUNNEL_KEY_ENC_DST_PORT] = {.type = NLA_U16},
86087e17	192	[TCA_TUNNEL_KEY_NO_CSUM] = { .type = NLA_U8 },
0ed5269f	193	[TCA_TUNNEL_KEY_ENC_OPTS] = { .type = NLA_NESTED },
07a557f4 OG	194	[TCA_TUNNEL_KEY_ENC_TOS] = { .type = NLA_U8 },
07a557f4 OG	195	[TCA_TUNNEL_KEY_ENC_TTL] = { .type = NLA_U8 },
d0f6dd8a AV	196	};
d0f6dd8a AV	197
9174c3df DC	198	static void tunnel_key_release_params(struct tcf_tunnel_key_params *p)
	199	{
	200	if (!p)
	201	return;
4177c5d9	202	if (p->tcft_action == TCA_TUNNEL_KEY_ACT_SET)
9174c3df	203	dst_release(&p->tcft_enc_metadata->dst);
4177c5d9	204
9174c3df DC	205	kfree_rcu(p, rcu);
	206	}
	207
d0f6dd8a AV	208	static int tunnel_key_init(struct net net, struct nlattr nla,
d0f6dd8a AV	209	struct nlattr est, struct tc_action *a,
789871bb	210	int ovr, int bind, bool rtnl_held,
85d0966f	211	struct tcf_proto *tp,
789871bb	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;
d0f6dd8a AV	217	struct metadata_dst *metadata = NULL;
e5fdabac	218	struct tcf_chain *goto_ch = NULL;
d0f6dd8a AV	219	struct tc_tunnel_key *parm;
	220	struct tcf_tunnel_key *t;
	221	bool exists = false;
75bfbca0	222	__be16 dst_port = 0;
80ef0f22	223	__be64 key_id = 0;
0ed5269f	224	int opts_len = 0;
80ef0f22	225	__be16 flags = 0;
07a557f4	226	u8 tos, ttl;
d0f6dd8a AV	227	int ret = 0;
	228	int err;
	229
9d7298cd SH	230	if (!nla) {
9d7298cd SH	231	NL_SET_ERR_MSG(extack, "Tunnel requires attributes to be passed");
d0f6dd8a	232	return -EINVAL;
9d7298cd	233	}
d0f6dd8a	234
8cb08174 JB	235	err = nla_parse_nested_deprecated(tb, TCA_TUNNEL_KEY_MAX, nla,
8cb08174 JB	236	tunnel_key_policy, extack);
9d7298cd SH	237	if (err < 0) {
9d7298cd SH	238	NL_SET_ERR_MSG(extack, "Failed to parse nested tunnel key attributes");
d0f6dd8a	239	return err;
9d7298cd	240	}
d0f6dd8a	241
9d7298cd SH	242	if (!tb[TCA_TUNNEL_KEY_PARMS]) {
9d7298cd SH	243	NL_SET_ERR_MSG(extack, "Missing tunnel key parameters");
d0f6dd8a	244	return -EINVAL;
9d7298cd	245	}
d0f6dd8a AV	246
d0f6dd8a AV	247	parm = nla_data(tb[TCA_TUNNEL_KEY_PARMS]);
0190c1d4 VB	248	err = tcf_idr_check_alloc(tn, &parm->index, a, bind);
	249	if (err < 0)
	250	return err;
	251	exists = err;
d0f6dd8a AV	252	if (exists && bind)
	253	return 0;
	254
	255	switch (parm->t_action) {
	256	case TCA_TUNNEL_KEY_ACT_RELEASE:
	257	break;
	258	case TCA_TUNNEL_KEY_ACT_SET:
80ef0f22 AN	259	if (tb[TCA_TUNNEL_KEY_ENC_KEY_ID]) {
80ef0f22 AN	260	__be32 key32;
d0f6dd8a	261
80ef0f22 AN	262	key32 = nla_get_be32(tb[TCA_TUNNEL_KEY_ENC_KEY_ID]);
	263	key_id = key32_to_tunnel_id(key32);
	264	flags = TUNNEL_KEY;
	265	}
d0f6dd8a	266
80ef0f22	267	flags \|= TUNNEL_CSUM;
86087e17 JB	268	if (tb[TCA_TUNNEL_KEY_NO_CSUM] &&
	269	nla_get_u8(tb[TCA_TUNNEL_KEY_NO_CSUM]))
	270	flags &= ~TUNNEL_CSUM;
	271
75bfbca0 HHZ	272	if (tb[TCA_TUNNEL_KEY_ENC_DST_PORT])
	273	dst_port = nla_get_be16(tb[TCA_TUNNEL_KEY_ENC_DST_PORT]);
	274
0ed5269f SH	275	if (tb[TCA_TUNNEL_KEY_ENC_OPTS]) {
	276	opts_len = tunnel_key_get_opts_len(tb[TCA_TUNNEL_KEY_ENC_OPTS],
	277	extack);
	278	if (opts_len < 0) {
	279	ret = opts_len;
	280	goto err_out;
	281	}
	282	}
	283
07a557f4 OG	284	tos = 0;
	285	if (tb[TCA_TUNNEL_KEY_ENC_TOS])
	286	tos = nla_get_u8(tb[TCA_TUNNEL_KEY_ENC_TOS]);
	287	ttl = 0;
	288	if (tb[TCA_TUNNEL_KEY_ENC_TTL])
	289	ttl = nla_get_u8(tb[TCA_TUNNEL_KEY_ENC_TTL]);
	290
d0f6dd8a AV	291	if (tb[TCA_TUNNEL_KEY_ENC_IPV4_SRC] &&
	292	tb[TCA_TUNNEL_KEY_ENC_IPV4_DST]) {
	293	__be32 saddr;
	294	__be32 daddr;
	295
	296	saddr = nla_get_in_addr(tb[TCA_TUNNEL_KEY_ENC_IPV4_SRC]);
	297	daddr = nla_get_in_addr(tb[TCA_TUNNEL_KEY_ENC_IPV4_DST]);
	298
07a557f4	299	metadata = __ip_tun_set_dst(saddr, daddr, tos, ttl,
86087e17	300	dst_port, flags,
0ed5269f	301	key_id, opts_len);
d0f6dd8a AV	302	} else if (tb[TCA_TUNNEL_KEY_ENC_IPV6_SRC] &&
	303	tb[TCA_TUNNEL_KEY_ENC_IPV6_DST]) {
	304	struct in6_addr saddr;
	305	struct in6_addr daddr;
	306
	307	saddr = nla_get_in6_addr(tb[TCA_TUNNEL_KEY_ENC_IPV6_SRC]);
	308	daddr = nla_get_in6_addr(tb[TCA_TUNNEL_KEY_ENC_IPV6_DST]);
	309
07a557f4	310	metadata = __ipv6_tun_set_dst(&saddr, &daddr, tos, ttl, dst_port,
86087e17	311	0, flags,
75bfbca0	312	key_id, 0);
a1165b59	313	} else {
9d7298cd	314	NL_SET_ERR_MSG(extack, "Missing either ipv4 or ipv6 src and dst");
a1165b59 SH	315	ret = -EINVAL;
a1165b59 SH	316	goto err_out;
d0f6dd8a AV	317	}
	318
	319	if (!metadata) {
9d7298cd	320	NL_SET_ERR_MSG(extack, "Cannot allocate tunnel metadata dst");
a1165b59	321	ret = -ENOMEM;
d0f6dd8a AV	322	goto err_out;
	323	}
	324
41411e2f	325	#ifdef CONFIG_DST_CACHE
	326	ret = dst_cache_init(&metadata->u.tun_info.dst_cache, GFP_KERNEL);
	327	if (ret)
	328	goto release_tun_meta;
	329	#endif
	330
0ed5269f SH	331	if (opts_len) {
	332	ret = tunnel_key_opts_set(tb[TCA_TUNNEL_KEY_ENC_OPTS],
	333	&metadata->u.tun_info,
	334	opts_len, extack);
	335	if (ret < 0)
4177c5d9	336	goto release_tun_meta;
0ed5269f SH	337	}
0ed5269f SH	338
d0f6dd8a AV	339	metadata->u.tun_info.mode \|= IP_TUNNEL_INFO_TX;
	340	break;
	341	default:
9d7298cd	342	NL_SET_ERR_MSG(extack, "Unknown tunnel key action");
51d4740f	343	ret = -EINVAL;
d0f6dd8a AV	344	goto err_out;
	345	}
	346
	347	if (!exists) {
65a206c0 CM	348	ret = tcf_idr_create(tn, parm->index, est, a,
65a206c0 CM	349	&act_tunnel_key_ops, bind, true);
9d7298cd SH	350	if (ret) {
9d7298cd SH	351	NL_SET_ERR_MSG(extack, "Cannot create TC IDR");
4177c5d9	352	goto release_tun_meta;
9d7298cd	353	}
d0f6dd8a AV	354
d0f6dd8a AV	355	ret = ACT_P_CREATED;
4e8ddd7f	356	} else if (!ovr) {
4e8ddd7f	357	NL_SET_ERR_MSG(extack, "TC IDR already exists");
ee28bb56	358	ret = -EEXIST;
4177c5d9	359	goto release_tun_meta;
d0f6dd8a AV	360	}
d0f6dd8a AV	361
e5fdabac DC	362	err = tcf_action_check_ctrlact(parm->action, tp, &goto_ch, extack);
	363	if (err < 0) {
	364	ret = err;
	365	exists = true;
	366	goto release_tun_meta;
	367	}
d0f6dd8a AV	368	t = to_tunnel_key(*a);
d0f6dd8a AV	369
d0f6dd8a AV	370	params_new = kzalloc(sizeof(*params_new), GFP_KERNEL);
d0f6dd8a AV	371	if (unlikely(!params_new)) {
9d7298cd	372	NL_SET_ERR_MSG(extack, "Cannot allocate tunnel key parameters");
ee28bb56 DC	373	ret = -ENOMEM;
ee28bb56 DC	374	exists = true;
e5fdabac	375	goto put_chain;
d0f6dd8a	376	}
d0f6dd8a AV	377	params_new->tcft_action = parm->t_action;
	378	params_new->tcft_enc_metadata = metadata;
	379
653cd284	380	spin_lock_bh(&t->tcf_lock);
e5fdabac	381	goto_ch = tcf_action_set_ctrlact(*a, parm->action, goto_ch);
729e0126 VB	382	rcu_swap_protected(t->params, params_new,
729e0126 VB	383	lockdep_is_held(&t->tcf_lock));
653cd284	384	spin_unlock_bh(&t->tcf_lock);
9174c3df	385	tunnel_key_release_params(params_new);
e5fdabac DC	386	if (goto_ch)
e5fdabac DC	387	tcf_chain_put_by_act(goto_ch);
d0f6dd8a AV	388
d0f6dd8a AV	389	if (ret == ACT_P_CREATED)
65a206c0	390	tcf_idr_insert(tn, *a);
d0f6dd8a AV	391
	392	return ret;
	393
e5fdabac DC	394	put_chain:
	395	if (goto_ch)
	396	tcf_chain_put_by_act(goto_ch);
	397
ee28bb56	398	release_tun_meta:
a3df633a VB	399	if (metadata)
a3df633a VB	400	dst_release(&metadata->dst);
ee28bb56	401
d0f6dd8a AV	402	err_out:
d0f6dd8a AV	403	if (exists)
65a206c0	404	tcf_idr_release(*a, bind);
0190c1d4 VB	405	else
0190c1d4 VB	406	tcf_idr_cleanup(tn, parm->index);
d0f6dd8a AV	407	return ret;
	408	}
	409
9a63b255	410	static void tunnel_key_release(struct tc_action *a)
d0f6dd8a AV	411	{
	412	struct tcf_tunnel_key *t = to_tunnel_key(a);
	413	struct tcf_tunnel_key_params *params;
	414
07c0f09e	415	params = rcu_dereference_protected(t->params, 1);
9174c3df	416	tunnel_key_release_params(params);
d0f6dd8a AV	417	}
d0f6dd8a AV	418
0ed5269f SH	419	static int tunnel_key_geneve_opts_dump(struct sk_buff *skb,
	420	const struct ip_tunnel_info *info)
	421	{
	422	int len = info->options_len;
	423	u8 src = (u8 )(info + 1);
	424	struct nlattr *start;
	425
ae0be8de	426	start = nla_nest_start_noflag(skb, TCA_TUNNEL_KEY_ENC_OPTS_GENEVE);
0ed5269f SH	427	if (!start)
	428	return -EMSGSIZE;
	429
	430	while (len > 0) {
	431	struct geneve_opt opt = (struct geneve_opt )src;
	432
	433	if (nla_put_be16(skb, TCA_TUNNEL_KEY_ENC_OPT_GENEVE_CLASS,
	434	opt->opt_class) \|\|
	435	nla_put_u8(skb, TCA_TUNNEL_KEY_ENC_OPT_GENEVE_TYPE,
	436	opt->type) \|\|
	437	nla_put(skb, TCA_TUNNEL_KEY_ENC_OPT_GENEVE_DATA,
a162c351 CW	438	opt->length * 4, opt + 1)) {
a162c351 CW	439	nla_nest_cancel(skb, start);
0ed5269f	440	return -EMSGSIZE;
a162c351	441	}
0ed5269f SH	442
	443	len -= sizeof(struct geneve_opt) + opt->length * 4;
	444	src += sizeof(struct geneve_opt) + opt->length * 4;
	445	}
	446
	447	nla_nest_end(skb, start);
	448	return 0;
	449	}
	450
	451	static int tunnel_key_opts_dump(struct sk_buff *skb,
	452	const struct ip_tunnel_info *info)
	453	{
	454	struct nlattr *start;
a162c351	455	int err = -EINVAL;
0ed5269f SH	456
	457	if (!info->options_len)
	458	return 0;
	459
ae0be8de	460	start = nla_nest_start_noflag(skb, TCA_TUNNEL_KEY_ENC_OPTS);
0ed5269f SH	461	if (!start)
	462	return -EMSGSIZE;
	463
	464	if (info->key.tun_flags & TUNNEL_GENEVE_OPT) {
	465	err = tunnel_key_geneve_opts_dump(skb, info);
	466	if (err)
a162c351	467	goto err_out;
0ed5269f	468	} else {
a162c351 CW	469	err_out:
	470	nla_nest_cancel(skb, start);
	471	return err;
0ed5269f SH	472	}
	473
	474	nla_nest_end(skb, start);
	475	return 0;
	476	}
	477
d0f6dd8a AV	478	static int tunnel_key_dump_addresses(struct sk_buff *skb,
	479	const struct ip_tunnel_info *info)
	480	{
	481	unsigned short family = ip_tunnel_info_af(info);
	482
	483	if (family == AF_INET) {
	484	__be32 saddr = info->key.u.ipv4.src;
	485	__be32 daddr = info->key.u.ipv4.dst;
	486
	487	if (!nla_put_in_addr(skb, TCA_TUNNEL_KEY_ENC_IPV4_SRC, saddr) &&
	488	!nla_put_in_addr(skb, TCA_TUNNEL_KEY_ENC_IPV4_DST, daddr))
	489	return 0;
	490	}
	491
	492	if (family == AF_INET6) {
	493	const struct in6_addr *saddr6 = &info->key.u.ipv6.src;
	494	const struct in6_addr *daddr6 = &info->key.u.ipv6.dst;
	495
	496	if (!nla_put_in6_addr(skb,
	497	TCA_TUNNEL_KEY_ENC_IPV6_SRC, saddr6) &&
	498	!nla_put_in6_addr(skb,
	499	TCA_TUNNEL_KEY_ENC_IPV6_DST, daddr6))
	500	return 0;
	501	}
	502
	503	return -EINVAL;
	504	}
	505
	506	static int tunnel_key_dump(struct sk_buff skb, struct tc_action a,
	507	int bind, int ref)
	508	{
	509	unsigned char *b = skb_tail_pointer(skb);
	510	struct tcf_tunnel_key *t = to_tunnel_key(a);
	511	struct tcf_tunnel_key_params *params;
	512	struct tc_tunnel_key opt = {
	513	.index = t->tcf_index,
036bb443 VB	514	.refcnt = refcount_read(&t->tcf_refcnt) - ref,
036bb443 VB	515	.bindcnt = atomic_read(&t->tcf_bindcnt) - bind,
d0f6dd8a AV	516	};
d0f6dd8a AV	517	struct tcf_t tm;
d0f6dd8a	518
653cd284	519	spin_lock_bh(&t->tcf_lock);
729e0126 VB	520	params = rcu_dereference_protected(t->params,
	521	lockdep_is_held(&t->tcf_lock));
	522	opt.action = t->tcf_action;
d0f6dd8a	523	opt.t_action = params->tcft_action;
d0f6dd8a AV	524
	525	if (nla_put(skb, TCA_TUNNEL_KEY_PARMS, sizeof(opt), &opt))
	526	goto nla_put_failure;
	527
	528	if (params->tcft_action == TCA_TUNNEL_KEY_ACT_SET) {
0ed5269f SH	529	struct ip_tunnel_info *info =
	530	&params->tcft_enc_metadata->u.tun_info;
	531	struct ip_tunnel_key *key = &info->key;
d0f6dd8a AV	532	__be32 key_id = tunnel_id_to_key32(key->tun_id);
d0f6dd8a AV	533
80ef0f22 AN	534	if (((key->tun_flags & TUNNEL_KEY) &&
80ef0f22 AN	535	nla_put_be32(skb, TCA_TUNNEL_KEY_ENC_KEY_ID, key_id)) \|\|
d0f6dd8a	536	tunnel_key_dump_addresses(skb,
75bfbca0	537	&params->tcft_enc_metadata->u.tun_info) \|\|
1c25324c AN	538	(key->tp_dst &&
	539	nla_put_be16(skb, TCA_TUNNEL_KEY_ENC_DST_PORT,
	540	key->tp_dst)) \|\|
86087e17	541	nla_put_u8(skb, TCA_TUNNEL_KEY_NO_CSUM,
0ed5269f SH	542	!(key->tun_flags & TUNNEL_CSUM)) \|\|
0ed5269f SH	543	tunnel_key_opts_dump(skb, info))
d0f6dd8a	544	goto nla_put_failure;
07a557f4 OG	545
	546	if (key->tos && nla_put_u8(skb, TCA_TUNNEL_KEY_ENC_TOS, key->tos))
	547	goto nla_put_failure;
	548
	549	if (key->ttl && nla_put_u8(skb, TCA_TUNNEL_KEY_ENC_TTL, key->ttl))
	550	goto nla_put_failure;
d0f6dd8a AV	551	}
	552
	553	tcf_tm_dump(&tm, &t->tcf_tm);
	554	if (nla_put_64bit(skb, TCA_TUNNEL_KEY_TM, sizeof(tm),
	555	&tm, TCA_TUNNEL_KEY_PAD))
	556	goto nla_put_failure;
653cd284	557	spin_unlock_bh(&t->tcf_lock);
d0f6dd8a	558
07c0f09e	559	return skb->len;
d0f6dd8a AV	560
d0f6dd8a AV	561	nla_put_failure:
653cd284	562	spin_unlock_bh(&t->tcf_lock);
d0f6dd8a	563	nlmsg_trim(skb, b);
07c0f09e	564	return -1;
d0f6dd8a AV	565	}
	566
	567	static int tunnel_key_walker(struct net net, struct sk_buff skb,
	568	struct netlink_callback *cb, int type,
41780105 AA	569	const struct tc_action_ops *ops,
41780105 AA	570	struct netlink_ext_ack *extack)
d0f6dd8a AV	571	{
	572	struct tc_action_net *tn = net_generic(net, tunnel_key_net_id);
	573
b3620145	574	return tcf_generic_walker(tn, skb, cb, type, ops, extack);
d0f6dd8a AV	575	}
d0f6dd8a AV	576
f061b48c	577	static int tunnel_key_search(struct net net, struct tc_action *a, u32 index)
d0f6dd8a AV	578	{
	579	struct tc_action_net *tn = net_generic(net, tunnel_key_net_id);
	580
65a206c0	581	return tcf_idr_search(tn, a, index);
d0f6dd8a AV	582	}
	583
	584	static struct tc_action_ops act_tunnel_key_ops = {
	585	.kind = "tunnel_key",
eddd2cf1	586	.id = TCA_ID_TUNNEL_KEY,
d0f6dd8a AV	587	.owner = THIS_MODULE,
	588	.act = tunnel_key_act,
	589	.dump = tunnel_key_dump,
	590	.init = tunnel_key_init,
	591	.cleanup = tunnel_key_release,
	592	.walk = tunnel_key_walker,
	593	.lookup = tunnel_key_search,
	594	.size = sizeof(struct tcf_tunnel_key),
	595	};
	596
	597	static __net_init int tunnel_key_init_net(struct net *net)
	598	{
	599	struct tc_action_net *tn = net_generic(net, tunnel_key_net_id);
	600
c7e460ce	601	return tc_action_net_init(tn, &act_tunnel_key_ops);
d0f6dd8a AV	602	}
d0f6dd8a AV	603
039af9c6	604	static void __net_exit tunnel_key_exit_net(struct list_head *net_list)
d0f6dd8a	605	{
039af9c6	606	tc_action_net_exit(net_list, tunnel_key_net_id);
d0f6dd8a AV	607	}
	608
	609	static struct pernet_operations tunnel_key_net_ops = {
	610	.init = tunnel_key_init_net,
039af9c6	611	.exit_batch = tunnel_key_exit_net,
d0f6dd8a AV	612	.id = &tunnel_key_net_id,
	613	.size = sizeof(struct tc_action_net),
	614	};
	615
	616	static int __init tunnel_key_init_module(void)
	617	{
	618	return tcf_register_action(&act_tunnel_key_ops, &tunnel_key_net_ops);
	619	}
	620
	621	static void __exit tunnel_key_cleanup_module(void)
	622	{
	623	tcf_unregister_action(&act_tunnel_key_ops, &tunnel_key_net_ops);
	624	}
	625
	626	module_init(tunnel_key_init_module);
	627	module_exit(tunnel_key_cleanup_module);
	628
	629	MODULE_AUTHOR("Amir Vadai <amir@vadai.me>");
	630	MODULE_DESCRIPTION("ip tunnel manipulation actions");
	631	MODULE_LICENSE("GPL v2");