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

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Copyright (c) 2014 Jiri Pirko <[email protected]>
 */

#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 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, act_vlan_ops.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 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 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,
	.stats_update	=	tcf_vlan_stats_update,
	.get_fill_size	=	tcf_vlan_get_fill_size,
	.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, act_vlan_ops.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, act_vlan_ops.net_id);
}

static struct pernet_operations vlan_net_ops = {
	.init = vlan_init_net,
	.exit_batch = vlan_exit_net,
	.id   = &act_vlan_ops.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 <[email protected]>");
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 <[email protected]>
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
a85a970a	19	static struct tc_action_ops act_vlan_ops;
ddf97ccd	20
8aa7f22e JHS	21	static int tcf_vlan_act(struct sk_buff skb, const struct tc_action a,
8aa7f22e JHS	22	struct tcf_result *res)
c7e2b968	23	{
a85a970a	24	struct tcf_vlan *v = to_vlan(a);
4c5b9d96	25	struct tcf_vlan_params *p;
c7e2b968 JP	26	int action;
c7e2b968 JP	27	int err;
45a497f2	28	u16 tci;
c7e2b968	29
9c4a4e48	30	tcf_lastuse_update(&v->tcf_tm);
5e1ad95b	31	tcf_action_update_bstats(&v->common, skb);
e0496cbb	32
f39acc84 SL	33	/* Ensure 'data' points at mac_header prior calling vlan manipulating
	34	* functions.
	35	*/
	36	if (skb_at_tc_ingress(skb))
	37	skb_push_rcsum(skb, skb->mac_len);
	38
4c5b9d96 MK	39	action = READ_ONCE(v->tcf_action);
4c5b9d96 MK	40
7fd4b288	41	p = rcu_dereference_bh(v->vlan_p);
4c5b9d96 MK	42
4c5b9d96 MK	43	switch (p->tcfv_action) {
c7e2b968 JP	44	case TCA_VLAN_ACT_POP:
	45	err = skb_vlan_pop(skb);
	46	if (err)
	47	goto drop;
	48	break;
	49	case TCA_VLAN_ACT_PUSH:
4c5b9d96 MK	50	err = skb_vlan_push(skb, p->tcfv_push_proto, p->tcfv_push_vid \|
4c5b9d96 MK	51	(p->tcfv_push_prio << VLAN_PRIO_SHIFT));
c7e2b968 JP	52	if (err)
	53	goto drop;
	54	break;
45a497f2 SL	55	case TCA_VLAN_ACT_MODIFY:
	56	/* No-op if no vlan tag (either hw-accel or in-payload) */
	57	if (!skb_vlan_tagged(skb))
7fd4b288	58	goto out;
45a497f2 SL	59	/* extract existing tag (and guarantee no hw-accel tag) */
	60	if (skb_vlan_tag_present(skb)) {
	61	tci = skb_vlan_tag_get(skb);
b1817524	62	__vlan_hwaccel_clear_tag(skb);
45a497f2 SL	63	} else {
	64	/* in-payload vlan tag, pop it */
	65	err = __skb_vlan_pop(skb, &tci);
	66	if (err)
	67	goto drop;
	68	}
	69	/* replace the vid */
4c5b9d96	70	tci = (tci & ~VLAN_VID_MASK) \| p->tcfv_push_vid;
45a497f2	71	/* replace prio bits, if tcfv_push_prio specified */
9c5eee0a	72	if (p->tcfv_push_prio_exists) {
45a497f2	73	tci &= ~VLAN_PRIO_MASK;
4c5b9d96	74	tci \|= p->tcfv_push_prio << VLAN_PRIO_SHIFT;
45a497f2 SL	75	}
45a497f2 SL	76	/* put updated tci as hwaccel tag */
4c5b9d96	77	__vlan_hwaccel_put_tag(skb, p->tcfv_push_proto, tci);
45a497f2	78	break;
19fbcb36 GN	79	case TCA_VLAN_ACT_POP_ETH:
	80	err = skb_eth_pop(skb);
	81	if (err)
	82	goto drop;
	83	break;
	84	case TCA_VLAN_ACT_PUSH_ETH:
	85	err = skb_eth_push(skb, p->tcfv_push_dst, p->tcfv_push_src);
	86	if (err)
	87	goto drop;
	88	break;
c7e2b968 JP	89	default:
	90	BUG();
	91	}
	92
7fd4b288	93	out:
f39acc84 SL	94	if (skb_at_tc_ingress(skb))
	95	skb_pull_rcsum(skb, skb->mac_len);
	96
c7e2b968	97	return action;
7fd4b288 PA	98
7fd4b288 PA	99	drop:
26b537a8	100	tcf_action_inc_drop_qstats(&v->common);
7fd4b288	101	return TC_ACT_SHOT;
c7e2b968 JP	102	}
	103
	104	static const struct nla_policy vlan_policy[TCA_VLAN_MAX + 1] = {
19fbcb36	105	[TCA_VLAN_UNSPEC] = { .strict_start_type = TCA_VLAN_PUSH_ETH_DST },
c7e2b968 JP	106	[TCA_VLAN_PARMS] = { .len = sizeof(struct tc_vlan) },
	107	[TCA_VLAN_PUSH_VLAN_ID] = { .type = NLA_U16 },
	108	[TCA_VLAN_PUSH_VLAN_PROTOCOL] = { .type = NLA_U16 },
956af371	109	[TCA_VLAN_PUSH_VLAN_PRIORITY] = { .type = NLA_U8 },
19fbcb36 GN	110	[TCA_VLAN_PUSH_ETH_DST] = NLA_POLICY_ETH_ADDR,
19fbcb36 GN	111	[TCA_VLAN_PUSH_ETH_SRC] = NLA_POLICY_ETH_ADDR,
c7e2b968 JP	112	};
	113
	114	static int tcf_vlan_init(struct net net, struct nlattr nla,
a85a970a	115	struct nlattr est, struct tc_action *a,
abbb0d33 VB	116	struct tcf_proto *tp, u32 flags,
abbb0d33 VB	117	struct netlink_ext_ack *extack)
c7e2b968	118	{
acd0a7ab	119	struct tc_action_net *tn = net_generic(net, act_vlan_ops.net_id);
695176bf	120	bool bind = flags & TCA_ACT_FLAGS_BIND;
c7e2b968	121	struct nlattr *tb[TCA_VLAN_MAX + 1];
7e0c8892	122	struct tcf_chain *goto_ch = NULL;
9c5eee0a	123	bool push_prio_exists = false;
764e9a24	124	struct tcf_vlan_params *p;
c7e2b968 JP	125	struct tc_vlan *parm;
	126	struct tcf_vlan *v;
	127	int action;
94cb5492	128	u16 push_vid = 0;
c7e2b968	129	__be16 push_proto = 0;
956af371	130	u8 push_prio = 0;
b2313077 WC	131	bool exists = false;
b2313077 WC	132	int ret = 0, err;
7be8ef2c	133	u32 index;
c7e2b968 JP	134
	135	if (!nla)
	136	return -EINVAL;
	137
8cb08174 JB	138	err = nla_parse_nested_deprecated(tb, TCA_VLAN_MAX, nla, vlan_policy,
8cb08174 JB	139	NULL);
c7e2b968 JP	140	if (err < 0)
	141	return err;
	142
	143	if (!tb[TCA_VLAN_PARMS])
	144	return -EINVAL;
	145	parm = nla_data(tb[TCA_VLAN_PARMS]);
7be8ef2c DL	146	index = parm->index;
7be8ef2c DL	147	err = tcf_idr_check_alloc(tn, &index, a, bind);
0190c1d4 VB	148	if (err < 0)
	149	return err;
	150	exists = err;
5026c9b1 JHS	151	if (exists && bind)
	152	return 0;
	153
c7e2b968 JP	154	switch (parm->v_action) {
	155	case TCA_VLAN_ACT_POP:
	156	break;
	157	case TCA_VLAN_ACT_PUSH:
45a497f2	158	case TCA_VLAN_ACT_MODIFY:
5026c9b1 JHS	159	if (!tb[TCA_VLAN_PUSH_VLAN_ID]) {
5026c9b1 JHS	160	if (exists)
65a206c0	161	tcf_idr_release(*a, bind);
0190c1d4	162	else
7be8ef2c	163	tcf_idr_cleanup(tn, index);
c7e2b968	164	return -EINVAL;
5026c9b1	165	}
c7e2b968	166	push_vid = nla_get_u16(tb[TCA_VLAN_PUSH_VLAN_ID]);
5026c9b1 JHS	167	if (push_vid >= VLAN_VID_MASK) {
5026c9b1 JHS	168	if (exists)
65a206c0	169	tcf_idr_release(*a, bind);
0190c1d4	170	else
7be8ef2c	171	tcf_idr_cleanup(tn, index);
c7e2b968	172	return -ERANGE;
5026c9b1	173	}
c7e2b968 JP	174
	175	if (tb[TCA_VLAN_PUSH_VLAN_PROTOCOL]) {
	176	push_proto = nla_get_be16(tb[TCA_VLAN_PUSH_VLAN_PROTOCOL]);
	177	switch (push_proto) {
	178	case htons(ETH_P_8021Q):
	179	case htons(ETH_P_8021AD):
	180	break;
	181	default:
5a4931ae DC	182	if (exists)
5a4931ae DC	183	tcf_idr_release(*a, bind);
0190c1d4	184	else
7be8ef2c	185	tcf_idr_cleanup(tn, index);
c7e2b968 JP	186	return -EPROTONOSUPPORT;
	187	}
	188	} else {
	189	push_proto = htons(ETH_P_8021Q);
	190	}
956af371	191
9c5eee0a BS	192	push_prio_exists = !!tb[TCA_VLAN_PUSH_VLAN_PRIORITY];
9c5eee0a BS	193	if (push_prio_exists)
956af371	194	push_prio = nla_get_u8(tb[TCA_VLAN_PUSH_VLAN_PRIORITY]);
c7e2b968	195	break;
19fbcb36 GN	196	case TCA_VLAN_ACT_POP_ETH:
	197	break;
	198	case TCA_VLAN_ACT_PUSH_ETH:
	199	if (!tb[TCA_VLAN_PUSH_ETH_DST] \|\| !tb[TCA_VLAN_PUSH_ETH_SRC]) {
	200	if (exists)
	201	tcf_idr_release(*a, bind);
	202	else
	203	tcf_idr_cleanup(tn, index);
	204	return -EINVAL;
	205	}
	206	break;
c7e2b968	207	default:
5026c9b1	208	if (exists)
65a206c0	209	tcf_idr_release(*a, bind);
0190c1d4	210	else
7be8ef2c	211	tcf_idr_cleanup(tn, index);
c7e2b968 JP	212	return -EINVAL;
	213	}
	214	action = parm->v_action;
	215
5026c9b1	216	if (!exists) {
e3822678 VB	217	ret = tcf_idr_create_from_flags(tn, index, est, a,
e3822678 VB	218	&act_vlan_ops, bind, flags);
0190c1d4	219	if (ret) {
7be8ef2c	220	tcf_idr_cleanup(tn, index);
c7e2b968	221	return ret;
0190c1d4	222	}
c7e2b968 JP	223
c7e2b968 JP	224	ret = ACT_P_CREATED;
695176bf	225	} else if (!(flags & TCA_ACT_FLAGS_REPLACE)) {
65a206c0	226	tcf_idr_release(*a, bind);
4e8ddd7f	227	return -EEXIST;
c7e2b968 JP	228	}
c7e2b968 JP	229
7e0c8892 DC	230	err = tcf_action_check_ctrlact(parm->action, tp, &goto_ch, extack);
	231	if (err < 0)
	232	goto release_idr;
	233
a85a970a	234	v = to_vlan(*a);
c7e2b968	235
4c5b9d96 MK	236	p = kzalloc(sizeof(*p), GFP_KERNEL);
4c5b9d96 MK	237	if (!p) {
7e0c8892 DC	238	err = -ENOMEM;
7e0c8892 DC	239	goto put_chain;
4c5b9d96	240	}
c7e2b968	241
4c5b9d96 MK	242	p->tcfv_action = action;
	243	p->tcfv_push_vid = push_vid;
	244	p->tcfv_push_prio = push_prio;
9c5eee0a	245	p->tcfv_push_prio_exists = push_prio_exists \|\| action == TCA_VLAN_ACT_PUSH;
4c5b9d96 MK	246	p->tcfv_push_proto = push_proto;
4c5b9d96 MK	247
19fbcb36 GN	248	if (action == TCA_VLAN_ACT_PUSH_ETH) {
	249	nla_memcpy(&p->tcfv_push_dst, tb[TCA_VLAN_PUSH_ETH_DST],
	250	ETH_ALEN);
	251	nla_memcpy(&p->tcfv_push_src, tb[TCA_VLAN_PUSH_ETH_SRC],
	252	ETH_ALEN);
	253	}
	254
653cd284	255	spin_lock_bh(&v->tcf_lock);
7e0c8892	256	goto_ch = tcf_action_set_ctrlact(*a, parm->action, goto_ch);
445d3749	257	p = rcu_replace_pointer(v->vlan_p, p, lockdep_is_held(&v->tcf_lock));
653cd284	258	spin_unlock_bh(&v->tcf_lock);
4c5b9d96	259
7e0c8892 DC	260	if (goto_ch)
7e0c8892 DC	261	tcf_chain_put_by_act(goto_ch);
764e9a24 VB	262	if (p)
764e9a24 VB	263	kfree_rcu(p, rcu);
c7e2b968	264
c7e2b968	265	return ret;
7e0c8892 DC	266	put_chain:
	267	if (goto_ch)
	268	tcf_chain_put_by_act(goto_ch);
	269	release_idr:
	270	tcf_idr_release(*a, bind);
	271	return err;
c7e2b968 JP	272	}
c7e2b968 JP	273
9a63b255	274	static void tcf_vlan_cleanup(struct tc_action *a)
4c5b9d96 MK	275	{
	276	struct tcf_vlan *v = to_vlan(a);
	277	struct tcf_vlan_params *p;
	278
	279	p = rcu_dereference_protected(v->vlan_p, 1);
1edf8abe DC	280	if (p)
1edf8abe DC	281	kfree_rcu(p, rcu);
4c5b9d96 MK	282	}
4c5b9d96 MK	283
c7e2b968 JP	284	static int tcf_vlan_dump(struct sk_buff skb, struct tc_action a,
	285	int bind, int ref)
	286	{
	287	unsigned char *b = skb_tail_pointer(skb);
a85a970a	288	struct tcf_vlan *v = to_vlan(a);
764e9a24	289	struct tcf_vlan_params *p;
c7e2b968 JP	290	struct tc_vlan opt = {
c7e2b968 JP	291	.index = v->tcf_index,
036bb443 VB	292	.refcnt = refcount_read(&v->tcf_refcnt) - ref,
036bb443 VB	293	.bindcnt = atomic_read(&v->tcf_bindcnt) - bind,
c7e2b968 JP	294	};
	295	struct tcf_t t;
	296
653cd284	297	spin_lock_bh(&v->tcf_lock);
764e9a24 VB	298	opt.action = v->tcf_action;
	299	p = rcu_dereference_protected(v->vlan_p, lockdep_is_held(&v->tcf_lock));
	300	opt.v_action = p->tcfv_action;
c7e2b968 JP	301	if (nla_put(skb, TCA_VLAN_PARMS, sizeof(opt), &opt))
	302	goto nla_put_failure;
	303
4c5b9d96 MK	304	if ((p->tcfv_action == TCA_VLAN_ACT_PUSH \|\|
	305	p->tcfv_action == TCA_VLAN_ACT_MODIFY) &&
	306	(nla_put_u16(skb, TCA_VLAN_PUSH_VLAN_ID, p->tcfv_push_vid) \|\|
0b0f43fe	307	nla_put_be16(skb, TCA_VLAN_PUSH_VLAN_PROTOCOL,
4c5b9d96	308	p->tcfv_push_proto) \|\|
8323b20f BS	309	(p->tcfv_push_prio_exists &&
8323b20f BS	310	nla_put_u8(skb, TCA_VLAN_PUSH_VLAN_PRIORITY, p->tcfv_push_prio))))
c7e2b968 JP	311	goto nla_put_failure;
c7e2b968 JP	312
19fbcb36 GN	313	if (p->tcfv_action == TCA_VLAN_ACT_PUSH_ETH) {
	314	if (nla_put(skb, TCA_VLAN_PUSH_ETH_DST, ETH_ALEN,
	315	p->tcfv_push_dst))
	316	goto nla_put_failure;
	317	if (nla_put(skb, TCA_VLAN_PUSH_ETH_SRC, ETH_ALEN,
	318	p->tcfv_push_src))
	319	goto nla_put_failure;
	320	}
	321
48d8ee16	322	tcf_tm_dump(&t, &v->tcf_tm);
9854518e	323	if (nla_put_64bit(skb, TCA_VLAN_TM, sizeof(t), &t, TCA_VLAN_PAD))
c7e2b968	324	goto nla_put_failure;
653cd284	325	spin_unlock_bh(&v->tcf_lock);
764e9a24	326
c7e2b968 JP	327	return skb->len;
	328
	329	nla_put_failure:
653cd284	330	spin_unlock_bh(&v->tcf_lock);
c7e2b968 JP	331	nlmsg_trim(skb, b);
	332	return -1;
	333	}
	334
4b61d3e8 PL	335	static void tcf_vlan_stats_update(struct tc_action *a, u64 bytes, u64 packets,
4b61d3e8 PL	336	u64 drops, u64 lastuse, bool hw)
fa730a3b JP	337	{
	338	struct tcf_vlan *v = to_vlan(a);
	339	struct tcf_t *tm = &v->tcf_tm;
	340
4b61d3e8	341	tcf_action_update_stats(a, bytes, packets, drops, hw);
fa730a3b JP	342	tm->lastuse = max_t(u64, tm->lastuse, lastuse);
	343	}
	344
b35475c5 RM	345	static size_t tcf_vlan_get_fill_size(const struct tc_action *act)
	346	{
	347	return nla_total_size(sizeof(struct tc_vlan))
	348	+ nla_total_size(sizeof(u16)) /* TCA_VLAN_PUSH_VLAN_ID */
	349	+ nla_total_size(sizeof(u16)) /* TCA_VLAN_PUSH_VLAN_PROTOCOL */
	350	+ nla_total_size(sizeof(u8)); /* TCA_VLAN_PUSH_VLAN_PRIORITY */
	351	}
	352
c54e1d92	353	static int tcf_vlan_offload_act_setup(struct tc_action act, void entry_data,
c2ccf84e IS	354	u32 *index_inc, bool bind,
c2ccf84e IS	355	struct netlink_ext_ack *extack)
c54e1d92 BZ	356	{
	357	if (bind) {
	358	struct flow_action_entry *entry = entry_data;
	359
	360	switch (tcf_vlan_action(act)) {
	361	case TCA_VLAN_ACT_PUSH:
	362	entry->id = FLOW_ACTION_VLAN_PUSH;
	363	entry->vlan.vid = tcf_vlan_push_vid(act);
	364	entry->vlan.proto = tcf_vlan_push_proto(act);
	365	entry->vlan.prio = tcf_vlan_push_prio(act);
	366	break;
	367	case TCA_VLAN_ACT_POP:
	368	entry->id = FLOW_ACTION_VLAN_POP;
	369	break;
	370	case TCA_VLAN_ACT_MODIFY:
	371	entry->id = FLOW_ACTION_VLAN_MANGLE;
	372	entry->vlan.vid = tcf_vlan_push_vid(act);
	373	entry->vlan.proto = tcf_vlan_push_proto(act);
	374	entry->vlan.prio = tcf_vlan_push_prio(act);
	375	break;
ab95465c MD	376	case TCA_VLAN_ACT_POP_ETH:
	377	entry->id = FLOW_ACTION_VLAN_POP_ETH;
	378	break;
	379	case TCA_VLAN_ACT_PUSH_ETH:
	380	entry->id = FLOW_ACTION_VLAN_PUSH_ETH;
	381	tcf_vlan_push_eth(entry->vlan_push_eth.src, entry->vlan_push_eth.dst, act);
	382	break;
c54e1d92	383	default:
f8fab316	384	NL_SET_ERR_MSG_MOD(extack, "Unsupported vlan action mode offload");
c54e1d92 BZ	385	return -EOPNOTSUPP;
	386	}
	387	*index_inc = 1;
	388	} else {
8cbfe939 BZ	389	struct flow_offload_action *fl_action = entry_data;
	390
	391	switch (tcf_vlan_action(act)) {
	392	case TCA_VLAN_ACT_PUSH:
	393	fl_action->id = FLOW_ACTION_VLAN_PUSH;
	394	break;
	395	case TCA_VLAN_ACT_POP:
	396	fl_action->id = FLOW_ACTION_VLAN_POP;
	397	break;
	398	case TCA_VLAN_ACT_MODIFY:
	399	fl_action->id = FLOW_ACTION_VLAN_MANGLE;
	400	break;
ab95465c MD	401	case TCA_VLAN_ACT_POP_ETH:
	402	fl_action->id = FLOW_ACTION_VLAN_POP_ETH;
	403	break;
	404	case TCA_VLAN_ACT_PUSH_ETH:
	405	fl_action->id = FLOW_ACTION_VLAN_PUSH_ETH;
	406	break;
8cbfe939 BZ	407	default:
	408	return -EOPNOTSUPP;
	409	}
c54e1d92 BZ	410	}
	411
	412	return 0;
	413	}
	414
c7e2b968 JP	415	static struct tc_action_ops act_vlan_ops = {
c7e2b968 JP	416	.kind = "vlan",
eddd2cf1	417	.id = TCA_ID_VLAN,
c7e2b968	418	.owner = THIS_MODULE,
8aa7f22e	419	.act = tcf_vlan_act,
c7e2b968 JP	420	.dump = tcf_vlan_dump,
c7e2b968 JP	421	.init = tcf_vlan_init,
4c5b9d96	422	.cleanup = tcf_vlan_cleanup,
fa730a3b	423	.stats_update = tcf_vlan_stats_update,
b35475c5	424	.get_fill_size = tcf_vlan_get_fill_size,
c54e1d92	425	.offload_act_setup = tcf_vlan_offload_act_setup,
a85a970a	426	.size = sizeof(struct tcf_vlan),
ddf97ccd WC	427	};
	428
	429	static __net_init int vlan_init_net(struct net *net)
	430	{
acd0a7ab	431	struct tc_action_net *tn = net_generic(net, act_vlan_ops.net_id);
ddf97ccd	432
981471bd	433	return tc_action_net_init(net, tn, &act_vlan_ops);
ddf97ccd WC	434	}
ddf97ccd WC	435
039af9c6	436	static void __net_exit vlan_exit_net(struct list_head *net_list)
ddf97ccd	437	{
acd0a7ab	438	tc_action_net_exit(net_list, act_vlan_ops.net_id);
ddf97ccd WC	439	}
	440
	441	static struct pernet_operations vlan_net_ops = {
	442	.init = vlan_init_net,
039af9c6	443	.exit_batch = vlan_exit_net,
acd0a7ab	444	.id = &act_vlan_ops.net_id,
ddf97ccd	445	.size = sizeof(struct tc_action_net),
c7e2b968 JP	446	};
	447
	448	static int __init vlan_init_module(void)
	449	{
ddf97ccd	450	return tcf_register_action(&act_vlan_ops, &vlan_net_ops);
c7e2b968 JP	451	}
	452
	453	static void __exit vlan_cleanup_module(void)
	454	{
ddf97ccd	455	tcf_unregister_action(&act_vlan_ops, &vlan_net_ops);
c7e2b968 JP	456	}
	457
	458	module_init(vlan_init_module);
	459	module_exit(vlan_cleanup_module);
	460
	461	MODULE_AUTHOR("Jiri Pirko <[email protected]>");
	462	MODULE_DESCRIPTION("vlan manipulation actions");
	463	MODULE_LICENSE("GPL v2");