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

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Copyright (c) 2014 Jiri Pirko <jiri@resnulli.us>
 */

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

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

static unsigned int vlan_net_id;
static struct tc_action_ops act_vlan_ops;

static int tcf_vlan_act(struct sk_buff *skb, const struct tc_action *a,
			struct tcf_result *res)
{
	struct tcf_vlan *v = to_vlan(a);
	struct tcf_vlan_params *p;
	int action;
	int err;
	u16 tci;

	tcf_lastuse_update(&v->tcf_tm);
	tcf_action_update_bstats(&v->common, skb);

	/* Ensure 'data' points at mac_header prior calling vlan manipulating
	 * functions.
	 */
	if (skb_at_tc_ingress(skb))
		skb_push_rcsum(skb, skb->mac_len);

	action = READ_ONCE(v->tcf_action);

	p = rcu_dereference_bh(v->vlan_p);

	switch (p->tcfv_action) {
	case TCA_VLAN_ACT_POP:
		err = skb_vlan_pop(skb);
		if (err)
			goto drop;
		break;
	case TCA_VLAN_ACT_PUSH:
		err = skb_vlan_push(skb, p->tcfv_push_proto, p->tcfv_push_vid |
				    (p->tcfv_push_prio << VLAN_PRIO_SHIFT));
		if (err)
			goto drop;
		break;
	case TCA_VLAN_ACT_MODIFY:
		/* No-op if no vlan tag (either hw-accel or in-payload) */
		if (!skb_vlan_tagged(skb))
			goto out;
		/* extract existing tag (and guarantee no hw-accel tag) */
		if (skb_vlan_tag_present(skb)) {
			tci = skb_vlan_tag_get(skb);
			__vlan_hwaccel_clear_tag(skb);
		} else {
			/* in-payload vlan tag, pop it */
			err = __skb_vlan_pop(skb, &tci);
			if (err)
				goto drop;
		}
		/* replace the vid */
		tci = (tci & ~VLAN_VID_MASK) | p->tcfv_push_vid;
		/* replace prio bits, if tcfv_push_prio specified */
		if (p->tcfv_push_prio_exists) {
			tci &= ~VLAN_PRIO_MASK;
			tci |= p->tcfv_push_prio << VLAN_PRIO_SHIFT;
		}
		/* put updated tci as hwaccel tag */
		__vlan_hwaccel_put_tag(skb, p->tcfv_push_proto, tci);
		break;
	case TCA_VLAN_ACT_POP_ETH:
		err = skb_eth_pop(skb);
		if (err)
			goto drop;
		break;
	case TCA_VLAN_ACT_PUSH_ETH:
		err = skb_eth_push(skb, p->tcfv_push_dst, p->tcfv_push_src);
		if (err)
			goto drop;
		break;
	default:
		BUG();
	}

out:
	if (skb_at_tc_ingress(skb))
		skb_pull_rcsum(skb, skb->mac_len);

	return action;

drop:
	tcf_action_inc_drop_qstats(&v->common);
	return TC_ACT_SHOT;
}

static const struct nla_policy vlan_policy[TCA_VLAN_MAX + 1] = {
	[TCA_VLAN_UNSPEC]		= { .strict_start_type = TCA_VLAN_PUSH_ETH_DST },
	[TCA_VLAN_PARMS]		= { .len = sizeof(struct tc_vlan) },
	[TCA_VLAN_PUSH_VLAN_ID]		= { .type = NLA_U16 },
	[TCA_VLAN_PUSH_VLAN_PROTOCOL]	= { .type = NLA_U16 },
	[TCA_VLAN_PUSH_VLAN_PRIORITY]	= { .type = NLA_U8 },
	[TCA_VLAN_PUSH_ETH_DST]		= NLA_POLICY_ETH_ADDR,
	[TCA_VLAN_PUSH_ETH_SRC]		= NLA_POLICY_ETH_ADDR,
};

static int tcf_vlan_init(struct net *net, struct nlattr *nla,
			 struct nlattr *est, struct tc_action **a,
			 struct tcf_proto *tp, u32 flags,
			 struct netlink_ext_ack *extack)
{
	struct tc_action_net *tn = net_generic(net, vlan_net_id);
	bool bind = flags & TCA_ACT_FLAGS_BIND;
	struct nlattr *tb[TCA_VLAN_MAX + 1];
	struct tcf_chain *goto_ch = NULL;
	bool push_prio_exists = false;
	struct tcf_vlan_params *p;
	struct tc_vlan *parm;
	struct tcf_vlan *v;
	int action;
	u16 push_vid = 0;
	__be16 push_proto = 0;
	u8 push_prio = 0;
	bool exists = false;
	int ret = 0, err;
	u32 index;

	if (!nla)
		return -EINVAL;

	err = nla_parse_nested_deprecated(tb, TCA_VLAN_MAX, nla, vlan_policy,
					  NULL);
	if (err < 0)
		return err;

	if (!tb[TCA_VLAN_PARMS])
		return -EINVAL;
	parm = nla_data(tb[TCA_VLAN_PARMS]);
	index = parm->index;
	err = tcf_idr_check_alloc(tn, &index, a, bind);
	if (err < 0)
		return err;
	exists = err;
	if (exists && bind)
		return 0;

	switch (parm->v_action) {
	case TCA_VLAN_ACT_POP:
		break;
	case TCA_VLAN_ACT_PUSH:
	case TCA_VLAN_ACT_MODIFY:
		if (!tb[TCA_VLAN_PUSH_VLAN_ID]) {
			if (exists)
				tcf_idr_release(*a, bind);
			else
				tcf_idr_cleanup(tn, index);
			return -EINVAL;
		}
		push_vid = nla_get_u16(tb[TCA_VLAN_PUSH_VLAN_ID]);
		if (push_vid >= VLAN_VID_MASK) {
			if (exists)
				tcf_idr_release(*a, bind);
			else
				tcf_idr_cleanup(tn, index);
			return -ERANGE;
		}

		if (tb[TCA_VLAN_PUSH_VLAN_PROTOCOL]) {
			push_proto = nla_get_be16(tb[TCA_VLAN_PUSH_VLAN_PROTOCOL]);
			switch (push_proto) {
			case htons(ETH_P_8021Q):
			case htons(ETH_P_8021AD):
				break;
			default:
				if (exists)
					tcf_idr_release(*a, bind);
				else
					tcf_idr_cleanup(tn, index);
				return -EPROTONOSUPPORT;
			}
		} else {
			push_proto = htons(ETH_P_8021Q);
		}

		push_prio_exists = !!tb[TCA_VLAN_PUSH_VLAN_PRIORITY];
		if (push_prio_exists)
			push_prio = nla_get_u8(tb[TCA_VLAN_PUSH_VLAN_PRIORITY]);
		break;
	case TCA_VLAN_ACT_POP_ETH:
		break;
	case TCA_VLAN_ACT_PUSH_ETH:
		if (!tb[TCA_VLAN_PUSH_ETH_DST] || !tb[TCA_VLAN_PUSH_ETH_SRC]) {
			if (exists)
				tcf_idr_release(*a, bind);
			else
				tcf_idr_cleanup(tn, index);
			return -EINVAL;
		}
		break;
	default:
		if (exists)
			tcf_idr_release(*a, bind);
		else
			tcf_idr_cleanup(tn, index);
		return -EINVAL;
	}
	action = parm->v_action;

	if (!exists) {
		ret = tcf_idr_create_from_flags(tn, index, est, a,
						&act_vlan_ops, bind, flags);
		if (ret) {
			tcf_idr_cleanup(tn, index);
			return ret;
		}

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

	err = tcf_action_check_ctrlact(parm->action, tp, &goto_ch, extack);
	if (err < 0)
		goto release_idr;

	v = to_vlan(*a);

	p = kzalloc(sizeof(*p), GFP_KERNEL);
	if (!p) {
		err = -ENOMEM;
		goto put_chain;
	}

	p->tcfv_action = action;
	p->tcfv_push_vid = push_vid;
	p->tcfv_push_prio = push_prio;
	p->tcfv_push_prio_exists = push_prio_exists || action == TCA_VLAN_ACT_PUSH;
	p->tcfv_push_proto = push_proto;

	if (action == TCA_VLAN_ACT_PUSH_ETH) {
		nla_memcpy(&p->tcfv_push_dst, tb[TCA_VLAN_PUSH_ETH_DST],
			   ETH_ALEN);
		nla_memcpy(&p->tcfv_push_src, tb[TCA_VLAN_PUSH_ETH_SRC],
			   ETH_ALEN);
	}

	spin_lock_bh(&v->tcf_lock);
	goto_ch = tcf_action_set_ctrlact(*a, parm->action, goto_ch);
	p = rcu_replace_pointer(v->vlan_p, p, lockdep_is_held(&v->tcf_lock));
	spin_unlock_bh(&v->tcf_lock);

	if (goto_ch)
		tcf_chain_put_by_act(goto_ch);
	if (p)
		kfree_rcu(p, rcu);

	return ret;
put_chain:
	if (goto_ch)
		tcf_chain_put_by_act(goto_ch);
release_idr:
	tcf_idr_release(*a, bind);
	return err;
}

static void tcf_vlan_cleanup(struct tc_action *a)
{
	struct tcf_vlan *v = to_vlan(a);
	struct tcf_vlan_params *p;

	p = rcu_dereference_protected(v->vlan_p, 1);
	if (p)
		kfree_rcu(p, rcu);
}

static int tcf_vlan_dump(struct sk_buff *skb, struct tc_action *a,
			 int bind, int ref)
{
	unsigned char *b = skb_tail_pointer(skb);
	struct tcf_vlan *v = to_vlan(a);
	struct tcf_vlan_params *p;
	struct tc_vlan opt = {
		.index    = v->tcf_index,
		.refcnt   = refcount_read(&v->tcf_refcnt) - ref,
		.bindcnt  = atomic_read(&v->tcf_bindcnt) - bind,
	};
	struct tcf_t t;

	spin_lock_bh(&v->tcf_lock);
	opt.action = v->tcf_action;
	p = rcu_dereference_protected(v->vlan_p, lockdep_is_held(&v->tcf_lock));
	opt.v_action = p->tcfv_action;
	if (nla_put(skb, TCA_VLAN_PARMS, sizeof(opt), &opt))
		goto nla_put_failure;

	if ((p->tcfv_action == TCA_VLAN_ACT_PUSH ||
	     p->tcfv_action == TCA_VLAN_ACT_MODIFY) &&
	    (nla_put_u16(skb, TCA_VLAN_PUSH_VLAN_ID, p->tcfv_push_vid) ||
	     nla_put_be16(skb, TCA_VLAN_PUSH_VLAN_PROTOCOL,
			  p->tcfv_push_proto) ||
	     (p->tcfv_push_prio_exists &&
	      nla_put_u8(skb, TCA_VLAN_PUSH_VLAN_PRIORITY, p->tcfv_push_prio))))
		goto nla_put_failure;

	if (p->tcfv_action == TCA_VLAN_ACT_PUSH_ETH) {
		if (nla_put(skb, TCA_VLAN_PUSH_ETH_DST, ETH_ALEN,
			    p->tcfv_push_dst))
			goto nla_put_failure;
		if (nla_put(skb, TCA_VLAN_PUSH_ETH_SRC, ETH_ALEN,
			    p->tcfv_push_src))
			goto nla_put_failure;
	}

	tcf_tm_dump(&t, &v->tcf_tm);
	if (nla_put_64bit(skb, TCA_VLAN_TM, sizeof(t), &t, TCA_VLAN_PAD))
		goto nla_put_failure;
	spin_unlock_bh(&v->tcf_lock);

	return skb->len;

nla_put_failure:
	spin_unlock_bh(&v->tcf_lock);
	nlmsg_trim(skb, b);
	return -1;
}

static int tcf_vlan_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, vlan_net_id);

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

static void tcf_vlan_stats_update(struct tc_action *a, u64 bytes, u64 packets,
				  u64 drops, u64 lastuse, bool hw)
{
	struct tcf_vlan *v = to_vlan(a);
	struct tcf_t *tm = &v->tcf_tm;

	tcf_action_update_stats(a, bytes, packets, drops, hw);
	tm->lastuse = max_t(u64, tm->lastuse, lastuse);
}

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

	return tcf_idr_search(tn, a, index);
}

static size_t tcf_vlan_get_fill_size(const struct tc_action *act)
{
	return nla_total_size(sizeof(struct tc_vlan))
		+ nla_total_size(sizeof(u16)) /* TCA_VLAN_PUSH_VLAN_ID */
		+ nla_total_size(sizeof(u16)) /* TCA_VLAN_PUSH_VLAN_PROTOCOL */
		+ nla_total_size(sizeof(u8)); /* TCA_VLAN_PUSH_VLAN_PRIORITY */
}

static int tcf_vlan_offload_act_setup(struct tc_action *act, void *entry_data,
				      u32 *index_inc, bool bind,
				      struct netlink_ext_ack *extack)
{
	if (bind) {
		struct flow_action_entry *entry = entry_data;

		switch (tcf_vlan_action(act)) {
		case TCA_VLAN_ACT_PUSH:
			entry->id = FLOW_ACTION_VLAN_PUSH;
			entry->vlan.vid = tcf_vlan_push_vid(act);
			entry->vlan.proto = tcf_vlan_push_proto(act);
			entry->vlan.prio = tcf_vlan_push_prio(act);
			break;
		case TCA_VLAN_ACT_POP:
			entry->id = FLOW_ACTION_VLAN_POP;
			break;
		case TCA_VLAN_ACT_MODIFY:
			entry->id = FLOW_ACTION_VLAN_MANGLE;
			entry->vlan.vid = tcf_vlan_push_vid(act);
			entry->vlan.proto = tcf_vlan_push_proto(act);
			entry->vlan.prio = tcf_vlan_push_prio(act);
			break;
		case TCA_VLAN_ACT_POP_ETH:
			entry->id = FLOW_ACTION_VLAN_POP_ETH;
			break;
		case TCA_VLAN_ACT_PUSH_ETH:
			entry->id = FLOW_ACTION_VLAN_PUSH_ETH;
			tcf_vlan_push_eth(entry->vlan_push_eth.src, entry->vlan_push_eth.dst, act);
			break;
		default:
			NL_SET_ERR_MSG_MOD(extack, "Unsupported vlan action mode offload");
			return -EOPNOTSUPP;
		}
		*index_inc = 1;
	} else {
		struct flow_offload_action *fl_action = entry_data;

		switch (tcf_vlan_action(act)) {
		case TCA_VLAN_ACT_PUSH:
			fl_action->id = FLOW_ACTION_VLAN_PUSH;
			break;
		case TCA_VLAN_ACT_POP:
			fl_action->id = FLOW_ACTION_VLAN_POP;
			break;
		case TCA_VLAN_ACT_MODIFY:
			fl_action->id = FLOW_ACTION_VLAN_MANGLE;
			break;
		case TCA_VLAN_ACT_POP_ETH:
			fl_action->id = FLOW_ACTION_VLAN_POP_ETH;
			break;
		case TCA_VLAN_ACT_PUSH_ETH:
			fl_action->id = FLOW_ACTION_VLAN_PUSH_ETH;
			break;
		default:
			return -EOPNOTSUPP;
		}
	}

	return 0;
}

static struct tc_action_ops act_vlan_ops = {
	.kind		=	"vlan",
	.id		=	TCA_ID_VLAN,
	.owner		=	THIS_MODULE,
	.act		=	tcf_vlan_act,
	.dump		=	tcf_vlan_dump,
	.init		=	tcf_vlan_init,
	.cleanup	=	tcf_vlan_cleanup,
	.walk		=	tcf_vlan_walker,
	.stats_update	=	tcf_vlan_stats_update,
	.get_fill_size	=	tcf_vlan_get_fill_size,
	.lookup		=	tcf_vlan_search,
	.offload_act_setup =	tcf_vlan_offload_act_setup,
	.size		=	sizeof(struct tcf_vlan),
};

static __net_init int vlan_init_net(struct net *net)
{
	struct tc_action_net *tn = net_generic(net, vlan_net_id);

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

static void __net_exit vlan_exit_net(struct list_head *net_list)
{
	tc_action_net_exit(net_list, vlan_net_id);
}

static struct pernet_operations vlan_net_ops = {
	.init = vlan_init_net,
	.exit_batch = vlan_exit_net,
	.id   = &vlan_net_id,
	.size = sizeof(struct tc_action_net),
};

static int __init vlan_init_module(void)
{
	return tcf_register_action(&act_vlan_ops, &vlan_net_ops);
}

static void __exit vlan_cleanup_module(void)
{
	tcf_unregister_action(&act_vlan_ops, &vlan_net_ops);
}

module_init(vlan_init_module);
module_exit(vlan_cleanup_module);

MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>");
MODULE_DESCRIPTION("vlan manipulation actions");
MODULE_LICENSE("GPL v2");
Commit	Line	Data
2874c5fd	1	// SPDX-License-Identifier: GPL-2.0-or-later
c7e2b968 JP	2	/*
c7e2b968 JP	3	* Copyright (c) 2014 Jiri Pirko <jiri@resnulli.us>
c7e2b968 JP	4	*/
	5
	6	#include <linux/module.h>
	7	#include <linux/init.h>
	8	#include <linux/kernel.h>
	9	#include <linux/skbuff.h>
	10	#include <linux/rtnetlink.h>
	11	#include <linux/if_vlan.h>
	12	#include <net/netlink.h>
	13	#include <net/pkt_sched.h>
7e0c8892	14	#include <net/pkt_cls.h>
c7e2b968 JP	15
	16	#include <linux/tc_act/tc_vlan.h>
	17	#include <net/tc_act/tc_vlan.h>
	18
c7d03a00	19	static unsigned int vlan_net_id;
a85a970a	20	static struct tc_action_ops act_vlan_ops;
ddf97ccd	21
8aa7f22e JHS	22	static int tcf_vlan_act(struct sk_buff skb, const struct tc_action a,
8aa7f22e JHS	23	struct tcf_result *res)
c7e2b968	24	{
a85a970a	25	struct tcf_vlan *v = to_vlan(a);
4c5b9d96	26	struct tcf_vlan_params *p;
c7e2b968 JP	27	int action;
c7e2b968 JP	28	int err;
45a497f2	29	u16 tci;
c7e2b968	30
9c4a4e48	31	tcf_lastuse_update(&v->tcf_tm);
5e1ad95b	32	tcf_action_update_bstats(&v->common, skb);
e0496cbb	33
f39acc84 SL	34	/* Ensure 'data' points at mac_header prior calling vlan manipulating
	35	* functions.
	36	*/
	37	if (skb_at_tc_ingress(skb))
	38	skb_push_rcsum(skb, skb->mac_len);
	39
4c5b9d96 MK	40	action = READ_ONCE(v->tcf_action);
4c5b9d96 MK	41
7fd4b288	42	p = rcu_dereference_bh(v->vlan_p);
4c5b9d96 MK	43
4c5b9d96 MK	44	switch (p->tcfv_action) {
c7e2b968 JP	45	case TCA_VLAN_ACT_POP:
	46	err = skb_vlan_pop(skb);
	47	if (err)
	48	goto drop;
	49	break;
	50	case TCA_VLAN_ACT_PUSH:
4c5b9d96 MK	51	err = skb_vlan_push(skb, p->tcfv_push_proto, p->tcfv_push_vid \|
4c5b9d96 MK	52	(p->tcfv_push_prio << VLAN_PRIO_SHIFT));
c7e2b968 JP	53	if (err)
	54	goto drop;
	55	break;
45a497f2 SL	56	case TCA_VLAN_ACT_MODIFY:
	57	/* No-op if no vlan tag (either hw-accel or in-payload) */
	58	if (!skb_vlan_tagged(skb))
7fd4b288	59	goto out;
45a497f2 SL	60	/* extract existing tag (and guarantee no hw-accel tag) */
	61	if (skb_vlan_tag_present(skb)) {
	62	tci = skb_vlan_tag_get(skb);
b1817524	63	__vlan_hwaccel_clear_tag(skb);
45a497f2 SL	64	} else {
	65	/* in-payload vlan tag, pop it */
	66	err = __skb_vlan_pop(skb, &tci);
	67	if (err)
	68	goto drop;
	69	}
	70	/* replace the vid */
4c5b9d96	71	tci = (tci & ~VLAN_VID_MASK) \| p->tcfv_push_vid;
45a497f2	72	/* replace prio bits, if tcfv_push_prio specified */
9c5eee0a	73	if (p->tcfv_push_prio_exists) {
45a497f2	74	tci &= ~VLAN_PRIO_MASK;
4c5b9d96	75	tci \|= p->tcfv_push_prio << VLAN_PRIO_SHIFT;
45a497f2 SL	76	}
45a497f2 SL	77	/* put updated tci as hwaccel tag */
4c5b9d96	78	__vlan_hwaccel_put_tag(skb, p->tcfv_push_proto, tci);
45a497f2	79	break;
19fbcb36 GN	80	case TCA_VLAN_ACT_POP_ETH:
	81	err = skb_eth_pop(skb);
	82	if (err)
	83	goto drop;
	84	break;
	85	case TCA_VLAN_ACT_PUSH_ETH:
	86	err = skb_eth_push(skb, p->tcfv_push_dst, p->tcfv_push_src);
	87	if (err)
	88	goto drop;
	89	break;
c7e2b968 JP	90	default:
	91	BUG();
	92	}
	93
7fd4b288	94	out:
f39acc84 SL	95	if (skb_at_tc_ingress(skb))
	96	skb_pull_rcsum(skb, skb->mac_len);
	97
c7e2b968	98	return action;
7fd4b288 PA	99
7fd4b288 PA	100	drop:
26b537a8	101	tcf_action_inc_drop_qstats(&v->common);
7fd4b288	102	return TC_ACT_SHOT;
c7e2b968 JP	103	}
	104
	105	static const struct nla_policy vlan_policy[TCA_VLAN_MAX + 1] = {
19fbcb36	106	[TCA_VLAN_UNSPEC] = { .strict_start_type = TCA_VLAN_PUSH_ETH_DST },
c7e2b968 JP	107	[TCA_VLAN_PARMS] = { .len = sizeof(struct tc_vlan) },
	108	[TCA_VLAN_PUSH_VLAN_ID] = { .type = NLA_U16 },
	109	[TCA_VLAN_PUSH_VLAN_PROTOCOL] = { .type = NLA_U16 },
956af371	110	[TCA_VLAN_PUSH_VLAN_PRIORITY] = { .type = NLA_U8 },
19fbcb36 GN	111	[TCA_VLAN_PUSH_ETH_DST] = NLA_POLICY_ETH_ADDR,
19fbcb36 GN	112	[TCA_VLAN_PUSH_ETH_SRC] = NLA_POLICY_ETH_ADDR,
c7e2b968 JP	113	};
	114
	115	static int tcf_vlan_init(struct net net, struct nlattr nla,
a85a970a	116	struct nlattr est, struct tc_action *a,
abbb0d33 VB	117	struct tcf_proto *tp, u32 flags,
abbb0d33 VB	118	struct netlink_ext_ack *extack)
c7e2b968	119	{
ddf97ccd	120	struct tc_action_net *tn = net_generic(net, vlan_net_id);
695176bf	121	bool bind = flags & TCA_ACT_FLAGS_BIND;
c7e2b968	122	struct nlattr *tb[TCA_VLAN_MAX + 1];
7e0c8892	123	struct tcf_chain *goto_ch = NULL;
9c5eee0a	124	bool push_prio_exists = false;
764e9a24	125	struct tcf_vlan_params *p;
c7e2b968 JP	126	struct tc_vlan *parm;
	127	struct tcf_vlan *v;
	128	int action;
94cb5492	129	u16 push_vid = 0;
c7e2b968	130	__be16 push_proto = 0;
956af371	131	u8 push_prio = 0;
b2313077 WC	132	bool exists = false;
b2313077 WC	133	int ret = 0, err;
7be8ef2c	134	u32 index;
c7e2b968 JP	135
	136	if (!nla)
	137	return -EINVAL;
	138
8cb08174 JB	139	err = nla_parse_nested_deprecated(tb, TCA_VLAN_MAX, nla, vlan_policy,
8cb08174 JB	140	NULL);
c7e2b968 JP	141	if (err < 0)
	142	return err;
	143
	144	if (!tb[TCA_VLAN_PARMS])
	145	return -EINVAL;
	146	parm = nla_data(tb[TCA_VLAN_PARMS]);
7be8ef2c DL	147	index = parm->index;
7be8ef2c DL	148	err = tcf_idr_check_alloc(tn, &index, a, bind);
0190c1d4 VB	149	if (err < 0)
	150	return err;
	151	exists = err;
5026c9b1 JHS	152	if (exists && bind)
	153	return 0;
	154
c7e2b968 JP	155	switch (parm->v_action) {
	156	case TCA_VLAN_ACT_POP:
	157	break;
	158	case TCA_VLAN_ACT_PUSH:
45a497f2	159	case TCA_VLAN_ACT_MODIFY:
5026c9b1 JHS	160	if (!tb[TCA_VLAN_PUSH_VLAN_ID]) {
5026c9b1 JHS	161	if (exists)
65a206c0	162	tcf_idr_release(*a, bind);
0190c1d4	163	else
7be8ef2c	164	tcf_idr_cleanup(tn, index);
c7e2b968	165	return -EINVAL;
5026c9b1	166	}
c7e2b968	167	push_vid = nla_get_u16(tb[TCA_VLAN_PUSH_VLAN_ID]);
5026c9b1 JHS	168	if (push_vid >= VLAN_VID_MASK) {
5026c9b1 JHS	169	if (exists)
65a206c0	170	tcf_idr_release(*a, bind);
0190c1d4	171	else
7be8ef2c	172	tcf_idr_cleanup(tn, index);
c7e2b968	173	return -ERANGE;
5026c9b1	174	}
c7e2b968 JP	175
	176	if (tb[TCA_VLAN_PUSH_VLAN_PROTOCOL]) {
	177	push_proto = nla_get_be16(tb[TCA_VLAN_PUSH_VLAN_PROTOCOL]);
	178	switch (push_proto) {
	179	case htons(ETH_P_8021Q):
	180	case htons(ETH_P_8021AD):
	181	break;
	182	default:
5a4931ae DC	183	if (exists)
5a4931ae DC	184	tcf_idr_release(*a, bind);
0190c1d4	185	else
7be8ef2c	186	tcf_idr_cleanup(tn, index);
c7e2b968 JP	187	return -EPROTONOSUPPORT;
	188	}
	189	} else {
	190	push_proto = htons(ETH_P_8021Q);
	191	}
956af371	192
9c5eee0a BS	193	push_prio_exists = !!tb[TCA_VLAN_PUSH_VLAN_PRIORITY];
9c5eee0a BS	194	if (push_prio_exists)
956af371	195	push_prio = nla_get_u8(tb[TCA_VLAN_PUSH_VLAN_PRIORITY]);
c7e2b968	196	break;
19fbcb36 GN	197	case TCA_VLAN_ACT_POP_ETH:
	198	break;
	199	case TCA_VLAN_ACT_PUSH_ETH:
	200	if (!tb[TCA_VLAN_PUSH_ETH_DST] \|\| !tb[TCA_VLAN_PUSH_ETH_SRC]) {
	201	if (exists)
	202	tcf_idr_release(*a, bind);
	203	else
	204	tcf_idr_cleanup(tn, index);
	205	return -EINVAL;
	206	}
	207	break;
c7e2b968	208	default:
5026c9b1	209	if (exists)
65a206c0	210	tcf_idr_release(*a, bind);
0190c1d4	211	else
7be8ef2c	212	tcf_idr_cleanup(tn, index);
c7e2b968 JP	213	return -EINVAL;
	214	}
	215	action = parm->v_action;
	216
5026c9b1	217	if (!exists) {
e3822678 VB	218	ret = tcf_idr_create_from_flags(tn, index, est, a,
e3822678 VB	219	&act_vlan_ops, bind, flags);
0190c1d4	220	if (ret) {
7be8ef2c	221	tcf_idr_cleanup(tn, index);
c7e2b968	222	return ret;
0190c1d4	223	}
c7e2b968 JP	224
c7e2b968 JP	225	ret = ACT_P_CREATED;
695176bf	226	} else if (!(flags & TCA_ACT_FLAGS_REPLACE)) {
65a206c0	227	tcf_idr_release(*a, bind);
4e8ddd7f	228	return -EEXIST;
c7e2b968 JP	229	}
c7e2b968 JP	230
7e0c8892 DC	231	err = tcf_action_check_ctrlact(parm->action, tp, &goto_ch, extack);
	232	if (err < 0)
	233	goto release_idr;
	234
a85a970a	235	v = to_vlan(*a);
c7e2b968	236
4c5b9d96 MK	237	p = kzalloc(sizeof(*p), GFP_KERNEL);
4c5b9d96 MK	238	if (!p) {
7e0c8892 DC	239	err = -ENOMEM;
7e0c8892 DC	240	goto put_chain;
4c5b9d96	241	}
c7e2b968	242
4c5b9d96 MK	243	p->tcfv_action = action;
	244	p->tcfv_push_vid = push_vid;
	245	p->tcfv_push_prio = push_prio;
9c5eee0a	246	p->tcfv_push_prio_exists = push_prio_exists \|\| action == TCA_VLAN_ACT_PUSH;
4c5b9d96 MK	247	p->tcfv_push_proto = push_proto;
4c5b9d96 MK	248
19fbcb36 GN	249	if (action == TCA_VLAN_ACT_PUSH_ETH) {
	250	nla_memcpy(&p->tcfv_push_dst, tb[TCA_VLAN_PUSH_ETH_DST],
	251	ETH_ALEN);
	252	nla_memcpy(&p->tcfv_push_src, tb[TCA_VLAN_PUSH_ETH_SRC],
	253	ETH_ALEN);
	254	}
	255
653cd284	256	spin_lock_bh(&v->tcf_lock);
7e0c8892	257	goto_ch = tcf_action_set_ctrlact(*a, parm->action, goto_ch);
445d3749	258	p = rcu_replace_pointer(v->vlan_p, p, lockdep_is_held(&v->tcf_lock));
653cd284	259	spin_unlock_bh(&v->tcf_lock);
4c5b9d96	260
7e0c8892 DC	261	if (goto_ch)
7e0c8892 DC	262	tcf_chain_put_by_act(goto_ch);
764e9a24 VB	263	if (p)
764e9a24 VB	264	kfree_rcu(p, rcu);
c7e2b968	265
c7e2b968	266	return ret;
7e0c8892 DC	267	put_chain:
	268	if (goto_ch)
	269	tcf_chain_put_by_act(goto_ch);
	270	release_idr:
	271	tcf_idr_release(*a, bind);
	272	return err;
c7e2b968 JP	273	}
c7e2b968 JP	274
9a63b255	275	static void tcf_vlan_cleanup(struct tc_action *a)
4c5b9d96 MK	276	{
	277	struct tcf_vlan *v = to_vlan(a);
	278	struct tcf_vlan_params *p;
	279
	280	p = rcu_dereference_protected(v->vlan_p, 1);
1edf8abe DC	281	if (p)
1edf8abe DC	282	kfree_rcu(p, rcu);
4c5b9d96 MK	283	}
4c5b9d96 MK	284
c7e2b968 JP	285	static int tcf_vlan_dump(struct sk_buff skb, struct tc_action a,
	286	int bind, int ref)
	287	{
	288	unsigned char *b = skb_tail_pointer(skb);
a85a970a	289	struct tcf_vlan *v = to_vlan(a);
764e9a24	290	struct tcf_vlan_params *p;
c7e2b968 JP	291	struct tc_vlan opt = {
c7e2b968 JP	292	.index = v->tcf_index,
036bb443 VB	293	.refcnt = refcount_read(&v->tcf_refcnt) - ref,
036bb443 VB	294	.bindcnt = atomic_read(&v->tcf_bindcnt) - bind,
c7e2b968 JP	295	};
	296	struct tcf_t t;
	297
653cd284	298	spin_lock_bh(&v->tcf_lock);
764e9a24 VB	299	opt.action = v->tcf_action;
	300	p = rcu_dereference_protected(v->vlan_p, lockdep_is_held(&v->tcf_lock));
	301	opt.v_action = p->tcfv_action;
c7e2b968 JP	302	if (nla_put(skb, TCA_VLAN_PARMS, sizeof(opt), &opt))
	303	goto nla_put_failure;
	304
4c5b9d96 MK	305	if ((p->tcfv_action == TCA_VLAN_ACT_PUSH \|\|
	306	p->tcfv_action == TCA_VLAN_ACT_MODIFY) &&
	307	(nla_put_u16(skb, TCA_VLAN_PUSH_VLAN_ID, p->tcfv_push_vid) \|\|
0b0f43fe	308	nla_put_be16(skb, TCA_VLAN_PUSH_VLAN_PROTOCOL,
4c5b9d96	309	p->tcfv_push_proto) \|\|
8323b20f BS	310	(p->tcfv_push_prio_exists &&
8323b20f BS	311	nla_put_u8(skb, TCA_VLAN_PUSH_VLAN_PRIORITY, p->tcfv_push_prio))))
c7e2b968 JP	312	goto nla_put_failure;
c7e2b968 JP	313
19fbcb36 GN	314	if (p->tcfv_action == TCA_VLAN_ACT_PUSH_ETH) {
	315	if (nla_put(skb, TCA_VLAN_PUSH_ETH_DST, ETH_ALEN,
	316	p->tcfv_push_dst))
	317	goto nla_put_failure;
	318	if (nla_put(skb, TCA_VLAN_PUSH_ETH_SRC, ETH_ALEN,
	319	p->tcfv_push_src))
	320	goto nla_put_failure;
	321	}
	322
48d8ee16	323	tcf_tm_dump(&t, &v->tcf_tm);
9854518e	324	if (nla_put_64bit(skb, TCA_VLAN_TM, sizeof(t), &t, TCA_VLAN_PAD))
c7e2b968	325	goto nla_put_failure;
653cd284	326	spin_unlock_bh(&v->tcf_lock);
764e9a24	327
c7e2b968 JP	328	return skb->len;
	329
	330	nla_put_failure:
653cd284	331	spin_unlock_bh(&v->tcf_lock);
c7e2b968 JP	332	nlmsg_trim(skb, b);
	333	return -1;
	334	}
	335
ddf97ccd WC	336	static int tcf_vlan_walker(struct net net, struct sk_buff skb,
ddf97ccd WC	337	struct netlink_callback *cb, int type,
41780105 AA	338	const struct tc_action_ops *ops,
41780105 AA	339	struct netlink_ext_ack *extack)
ddf97ccd WC	340	{
	341	struct tc_action_net *tn = net_generic(net, vlan_net_id);
	342
b3620145	343	return tcf_generic_walker(tn, skb, cb, type, ops, extack);
ddf97ccd WC	344	}
ddf97ccd WC	345
4b61d3e8 PL	346	static void tcf_vlan_stats_update(struct tc_action *a, u64 bytes, u64 packets,
4b61d3e8 PL	347	u64 drops, u64 lastuse, bool hw)
fa730a3b JP	348	{
	349	struct tcf_vlan *v = to_vlan(a);
	350	struct tcf_t *tm = &v->tcf_tm;
	351
4b61d3e8	352	tcf_action_update_stats(a, bytes, packets, drops, hw);
fa730a3b JP	353	tm->lastuse = max_t(u64, tm->lastuse, lastuse);
	354	}
	355
f061b48c	356	static int tcf_vlan_search(struct net net, struct tc_action *a, u32 index)
ddf97ccd WC	357	{
	358	struct tc_action_net *tn = net_generic(net, vlan_net_id);
	359
65a206c0	360	return tcf_idr_search(tn, a, index);
ddf97ccd WC	361	}
ddf97ccd WC	362
b35475c5 RM	363	static size_t tcf_vlan_get_fill_size(const struct tc_action *act)
	364	{
	365	return nla_total_size(sizeof(struct tc_vlan))
	366	+ nla_total_size(sizeof(u16)) /* TCA_VLAN_PUSH_VLAN_ID */
	367	+ nla_total_size(sizeof(u16)) /* TCA_VLAN_PUSH_VLAN_PROTOCOL */
	368	+ nla_total_size(sizeof(u8)); /* TCA_VLAN_PUSH_VLAN_PRIORITY */
	369	}
	370
c54e1d92	371	static int tcf_vlan_offload_act_setup(struct tc_action act, void entry_data,
c2ccf84e IS	372	u32 *index_inc, bool bind,
c2ccf84e IS	373	struct netlink_ext_ack *extack)
c54e1d92 BZ	374	{
	375	if (bind) {
	376	struct flow_action_entry *entry = entry_data;
	377
	378	switch (tcf_vlan_action(act)) {
	379	case TCA_VLAN_ACT_PUSH:
	380	entry->id = FLOW_ACTION_VLAN_PUSH;
	381	entry->vlan.vid = tcf_vlan_push_vid(act);
	382	entry->vlan.proto = tcf_vlan_push_proto(act);
	383	entry->vlan.prio = tcf_vlan_push_prio(act);
	384	break;
	385	case TCA_VLAN_ACT_POP:
	386	entry->id = FLOW_ACTION_VLAN_POP;
	387	break;
	388	case TCA_VLAN_ACT_MODIFY:
	389	entry->id = FLOW_ACTION_VLAN_MANGLE;
	390	entry->vlan.vid = tcf_vlan_push_vid(act);
	391	entry->vlan.proto = tcf_vlan_push_proto(act);
	392	entry->vlan.prio = tcf_vlan_push_prio(act);
	393	break;
ab95465c MD	394	case TCA_VLAN_ACT_POP_ETH:
	395	entry->id = FLOW_ACTION_VLAN_POP_ETH;
	396	break;
	397	case TCA_VLAN_ACT_PUSH_ETH:
	398	entry->id = FLOW_ACTION_VLAN_PUSH_ETH;
	399	tcf_vlan_push_eth(entry->vlan_push_eth.src, entry->vlan_push_eth.dst, act);
	400	break;
c54e1d92	401	default:
f8fab316	402	NL_SET_ERR_MSG_MOD(extack, "Unsupported vlan action mode offload");
c54e1d92 BZ	403	return -EOPNOTSUPP;
	404	}
	405	*index_inc = 1;
	406	} else {
8cbfe939 BZ	407	struct flow_offload_action *fl_action = entry_data;
	408
	409	switch (tcf_vlan_action(act)) {
	410	case TCA_VLAN_ACT_PUSH:
	411	fl_action->id = FLOW_ACTION_VLAN_PUSH;
	412	break;
	413	case TCA_VLAN_ACT_POP:
	414	fl_action->id = FLOW_ACTION_VLAN_POP;
	415	break;
	416	case TCA_VLAN_ACT_MODIFY:
	417	fl_action->id = FLOW_ACTION_VLAN_MANGLE;
	418	break;
ab95465c MD	419	case TCA_VLAN_ACT_POP_ETH:
	420	fl_action->id = FLOW_ACTION_VLAN_POP_ETH;
	421	break;
	422	case TCA_VLAN_ACT_PUSH_ETH:
	423	fl_action->id = FLOW_ACTION_VLAN_PUSH_ETH;
	424	break;
8cbfe939 BZ	425	default:
	426	return -EOPNOTSUPP;
	427	}
c54e1d92 BZ	428	}
	429
	430	return 0;
	431	}
	432
c7e2b968 JP	433	static struct tc_action_ops act_vlan_ops = {
c7e2b968 JP	434	.kind = "vlan",
eddd2cf1	435	.id = TCA_ID_VLAN,
c7e2b968	436	.owner = THIS_MODULE,
8aa7f22e	437	.act = tcf_vlan_act,
c7e2b968 JP	438	.dump = tcf_vlan_dump,
c7e2b968 JP	439	.init = tcf_vlan_init,
4c5b9d96	440	.cleanup = tcf_vlan_cleanup,
ddf97ccd	441	.walk = tcf_vlan_walker,
fa730a3b	442	.stats_update = tcf_vlan_stats_update,
b35475c5	443	.get_fill_size = tcf_vlan_get_fill_size,
ddf97ccd	444	.lookup = tcf_vlan_search,
c54e1d92	445	.offload_act_setup = tcf_vlan_offload_act_setup,
a85a970a	446	.size = sizeof(struct tcf_vlan),
ddf97ccd WC	447	};
	448
	449	static __net_init int vlan_init_net(struct net *net)
	450	{
	451	struct tc_action_net *tn = net_generic(net, vlan_net_id);
	452
981471bd	453	return tc_action_net_init(net, tn, &act_vlan_ops);
ddf97ccd WC	454	}
ddf97ccd WC	455
039af9c6	456	static void __net_exit vlan_exit_net(struct list_head *net_list)
ddf97ccd	457	{
039af9c6	458	tc_action_net_exit(net_list, vlan_net_id);
ddf97ccd WC	459	}
	460
	461	static struct pernet_operations vlan_net_ops = {
	462	.init = vlan_init_net,
039af9c6	463	.exit_batch = vlan_exit_net,
ddf97ccd WC	464	.id = &vlan_net_id,
ddf97ccd WC	465	.size = sizeof(struct tc_action_net),
c7e2b968 JP	466	};
	467
	468	static int __init vlan_init_module(void)
	469	{
ddf97ccd	470	return tcf_register_action(&act_vlan_ops, &vlan_net_ops);
c7e2b968 JP	471	}
	472
	473	static void __exit vlan_cleanup_module(void)
	474	{
ddf97ccd	475	tcf_unregister_action(&act_vlan_ops, &vlan_net_ops);
c7e2b968 JP	476	}
	477
	478	module_init(vlan_init_module);
	479	module_exit(vlan_cleanup_module);
	480
	481	MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>");
	482	MODULE_DESCRIPTION("vlan manipulation actions");
	483	MODULE_LICENSE("GPL v2");