[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 <net/tc_wrapper.h>

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

static struct tc_action_ops act_vlan_ops;

TC_INDIRECT_SCOPE 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 ACT_P_BOUND;

	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),
};
MODULE_ALIAS_NET_ACT("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 <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>
871cf386	15	#include <net/tc_wrapper.h>
c7e2b968 JP	16
	17	#include <linux/tc_act/tc_vlan.h>
	18	#include <net/tc_act/tc_vlan.h>
	19
a85a970a	20	static struct tc_action_ops act_vlan_ops;
ddf97ccd	21
871cf386 PT	22	TC_INDIRECT_SCOPE int tcf_vlan_act(struct sk_buff *skb,
	23	const struct tc_action *a,
	24	struct tcf_result *res)
c7e2b968	25	{
a85a970a	26	struct tcf_vlan *v = to_vlan(a);
4c5b9d96	27	struct tcf_vlan_params *p;
c7e2b968 JP	28	int action;
c7e2b968 JP	29	int err;
45a497f2	30	u16 tci;
c7e2b968	31
9c4a4e48	32	tcf_lastuse_update(&v->tcf_tm);
5e1ad95b	33	tcf_action_update_bstats(&v->common, skb);
e0496cbb	34
f39acc84 SL	35	/* Ensure 'data' points at mac_header prior calling vlan manipulating
	36	* functions.
	37	*/
	38	if (skb_at_tc_ingress(skb))
	39	skb_push_rcsum(skb, skb->mac_len);
	40
4c5b9d96 MK	41	action = READ_ONCE(v->tcf_action);
4c5b9d96 MK	42
7fd4b288	43	p = rcu_dereference_bh(v->vlan_p);
4c5b9d96 MK	44
4c5b9d96 MK	45	switch (p->tcfv_action) {
c7e2b968 JP	46	case TCA_VLAN_ACT_POP:
	47	err = skb_vlan_pop(skb);
	48	if (err)
	49	goto drop;
	50	break;
	51	case TCA_VLAN_ACT_PUSH:
4c5b9d96 MK	52	err = skb_vlan_push(skb, p->tcfv_push_proto, p->tcfv_push_vid \|
4c5b9d96 MK	53	(p->tcfv_push_prio << VLAN_PRIO_SHIFT));
c7e2b968 JP	54	if (err)
	55	goto drop;
	56	break;
45a497f2 SL	57	case TCA_VLAN_ACT_MODIFY:
	58	/* No-op if no vlan tag (either hw-accel or in-payload) */
	59	if (!skb_vlan_tagged(skb))
7fd4b288	60	goto out;
45a497f2 SL	61	/* extract existing tag (and guarantee no hw-accel tag) */
	62	if (skb_vlan_tag_present(skb)) {
	63	tci = skb_vlan_tag_get(skb);
b1817524	64	__vlan_hwaccel_clear_tag(skb);
45a497f2 SL	65	} else {
	66	/* in-payload vlan tag, pop it */
	67	err = __skb_vlan_pop(skb, &tci);
	68	if (err)
	69	goto drop;
	70	}
	71	/* replace the vid */
4c5b9d96	72	tci = (tci & ~VLAN_VID_MASK) \| p->tcfv_push_vid;
45a497f2	73	/* replace prio bits, if tcfv_push_prio specified */
9c5eee0a	74	if (p->tcfv_push_prio_exists) {
45a497f2	75	tci &= ~VLAN_PRIO_MASK;
4c5b9d96	76	tci \|= p->tcfv_push_prio << VLAN_PRIO_SHIFT;
45a497f2 SL	77	}
45a497f2 SL	78	/* put updated tci as hwaccel tag */
4c5b9d96	79	__vlan_hwaccel_put_tag(skb, p->tcfv_push_proto, tci);
45a497f2	80	break;
19fbcb36 GN	81	case TCA_VLAN_ACT_POP_ETH:
	82	err = skb_eth_pop(skb);
	83	if (err)
	84	goto drop;
	85	break;
	86	case TCA_VLAN_ACT_PUSH_ETH:
	87	err = skb_eth_push(skb, p->tcfv_push_dst, p->tcfv_push_src);
	88	if (err)
	89	goto drop;
	90	break;
c7e2b968 JP	91	default:
	92	BUG();
	93	}
	94
7fd4b288	95	out:
f39acc84 SL	96	if (skb_at_tc_ingress(skb))
	97	skb_pull_rcsum(skb, skb->mac_len);
	98
c7e2b968	99	return action;
7fd4b288 PA	100
7fd4b288 PA	101	drop:
26b537a8	102	tcf_action_inc_drop_qstats(&v->common);
7fd4b288	103	return TC_ACT_SHOT;
c7e2b968 JP	104	}
	105
	106	static const struct nla_policy vlan_policy[TCA_VLAN_MAX + 1] = {
19fbcb36	107	[TCA_VLAN_UNSPEC] = { .strict_start_type = TCA_VLAN_PUSH_ETH_DST },
c7e2b968 JP	108	[TCA_VLAN_PARMS] = { .len = sizeof(struct tc_vlan) },
	109	[TCA_VLAN_PUSH_VLAN_ID] = { .type = NLA_U16 },
	110	[TCA_VLAN_PUSH_VLAN_PROTOCOL] = { .type = NLA_U16 },
956af371	111	[TCA_VLAN_PUSH_VLAN_PRIORITY] = { .type = NLA_U8 },
19fbcb36 GN	112	[TCA_VLAN_PUSH_ETH_DST] = NLA_POLICY_ETH_ADDR,
19fbcb36 GN	113	[TCA_VLAN_PUSH_ETH_SRC] = NLA_POLICY_ETH_ADDR,
c7e2b968 JP	114	};
	115
	116	static int tcf_vlan_init(struct net net, struct nlattr nla,
a85a970a	117	struct nlattr est, struct tc_action *a,
abbb0d33 VB	118	struct tcf_proto *tp, u32 flags,
abbb0d33 VB	119	struct netlink_ext_ack *extack)
c7e2b968	120	{
acd0a7ab	121	struct tc_action_net *tn = net_generic(net, act_vlan_ops.net_id);
695176bf	122	bool bind = flags & TCA_ACT_FLAGS_BIND;
c7e2b968	123	struct nlattr *tb[TCA_VLAN_MAX + 1];
7e0c8892	124	struct tcf_chain *goto_ch = NULL;
9c5eee0a	125	bool push_prio_exists = false;
764e9a24	126	struct tcf_vlan_params *p;
c7e2b968 JP	127	struct tc_vlan *parm;
	128	struct tcf_vlan *v;
	129	int action;
94cb5492	130	u16 push_vid = 0;
c7e2b968	131	__be16 push_proto = 0;
956af371	132	u8 push_prio = 0;
b2313077 WC	133	bool exists = false;
b2313077 WC	134	int ret = 0, err;
7be8ef2c	135	u32 index;
c7e2b968 JP	136
	137	if (!nla)
	138	return -EINVAL;
	139
8cb08174 JB	140	err = nla_parse_nested_deprecated(tb, TCA_VLAN_MAX, nla, vlan_policy,
8cb08174 JB	141	NULL);
c7e2b968 JP	142	if (err < 0)
	143	return err;
	144
	145	if (!tb[TCA_VLAN_PARMS])
	146	return -EINVAL;
	147	parm = nla_data(tb[TCA_VLAN_PARMS]);
7be8ef2c DL	148	index = parm->index;
7be8ef2c DL	149	err = tcf_idr_check_alloc(tn, &index, a, bind);
0190c1d4 VB	150	if (err < 0)
	151	return err;
	152	exists = err;
5026c9b1	153	if (exists && bind)
c2a67de9	154	return ACT_P_BOUND;
5026c9b1	155
c7e2b968 JP	156	switch (parm->v_action) {
	157	case TCA_VLAN_ACT_POP:
	158	break;
	159	case TCA_VLAN_ACT_PUSH:
45a497f2	160	case TCA_VLAN_ACT_MODIFY:
5026c9b1 JHS	161	if (!tb[TCA_VLAN_PUSH_VLAN_ID]) {
5026c9b1 JHS	162	if (exists)
65a206c0	163	tcf_idr_release(*a, bind);
0190c1d4	164	else
7be8ef2c	165	tcf_idr_cleanup(tn, index);
c7e2b968	166	return -EINVAL;
5026c9b1	167	}
c7e2b968	168	push_vid = nla_get_u16(tb[TCA_VLAN_PUSH_VLAN_ID]);
5026c9b1 JHS	169	if (push_vid >= VLAN_VID_MASK) {
5026c9b1 JHS	170	if (exists)
65a206c0	171	tcf_idr_release(*a, bind);
0190c1d4	172	else
7be8ef2c	173	tcf_idr_cleanup(tn, index);
c7e2b968	174	return -ERANGE;
5026c9b1	175	}
c7e2b968 JP	176
	177	if (tb[TCA_VLAN_PUSH_VLAN_PROTOCOL]) {
	178	push_proto = nla_get_be16(tb[TCA_VLAN_PUSH_VLAN_PROTOCOL]);
	179	switch (push_proto) {
	180	case htons(ETH_P_8021Q):
	181	case htons(ETH_P_8021AD):
	182	break;
	183	default:
5a4931ae DC	184	if (exists)
5a4931ae DC	185	tcf_idr_release(*a, bind);
0190c1d4	186	else
7be8ef2c	187	tcf_idr_cleanup(tn, index);
c7e2b968 JP	188	return -EPROTONOSUPPORT;
	189	}
	190	} else {
	191	push_proto = htons(ETH_P_8021Q);
	192	}
956af371	193
9c5eee0a BS	194	push_prio_exists = !!tb[TCA_VLAN_PUSH_VLAN_PRIORITY];
9c5eee0a BS	195	if (push_prio_exists)
956af371	196	push_prio = nla_get_u8(tb[TCA_VLAN_PUSH_VLAN_PRIORITY]);
c7e2b968	197	break;
19fbcb36 GN	198	case TCA_VLAN_ACT_POP_ETH:
	199	break;
	200	case TCA_VLAN_ACT_PUSH_ETH:
	201	if (!tb[TCA_VLAN_PUSH_ETH_DST] \|\| !tb[TCA_VLAN_PUSH_ETH_SRC]) {
	202	if (exists)
	203	tcf_idr_release(*a, bind);
	204	else
	205	tcf_idr_cleanup(tn, index);
	206	return -EINVAL;
	207	}
	208	break;
c7e2b968	209	default:
5026c9b1	210	if (exists)
65a206c0	211	tcf_idr_release(*a, bind);
0190c1d4	212	else
7be8ef2c	213	tcf_idr_cleanup(tn, index);
c7e2b968 JP	214	return -EINVAL;
	215	}
	216	action = parm->v_action;
	217
5026c9b1	218	if (!exists) {
e3822678 VB	219	ret = tcf_idr_create_from_flags(tn, index, est, a,
e3822678 VB	220	&act_vlan_ops, bind, flags);
0190c1d4	221	if (ret) {
7be8ef2c	222	tcf_idr_cleanup(tn, index);
c7e2b968	223	return ret;
0190c1d4	224	}
c7e2b968 JP	225
c7e2b968 JP	226	ret = ACT_P_CREATED;
695176bf	227	} else if (!(flags & TCA_ACT_FLAGS_REPLACE)) {
65a206c0	228	tcf_idr_release(*a, bind);
4e8ddd7f	229	return -EEXIST;
c7e2b968 JP	230	}
c7e2b968 JP	231
7e0c8892 DC	232	err = tcf_action_check_ctrlact(parm->action, tp, &goto_ch, extack);
	233	if (err < 0)
	234	goto release_idr;
	235
a85a970a	236	v = to_vlan(*a);
c7e2b968	237
4c5b9d96 MK	238	p = kzalloc(sizeof(*p), GFP_KERNEL);
4c5b9d96 MK	239	if (!p) {
7e0c8892 DC	240	err = -ENOMEM;
7e0c8892 DC	241	goto put_chain;
4c5b9d96	242	}
c7e2b968	243
4c5b9d96 MK	244	p->tcfv_action = action;
	245	p->tcfv_push_vid = push_vid;
	246	p->tcfv_push_prio = push_prio;
9c5eee0a	247	p->tcfv_push_prio_exists = push_prio_exists \|\| action == TCA_VLAN_ACT_PUSH;
4c5b9d96 MK	248	p->tcfv_push_proto = push_proto;
4c5b9d96 MK	249
19fbcb36 GN	250	if (action == TCA_VLAN_ACT_PUSH_ETH) {
	251	nla_memcpy(&p->tcfv_push_dst, tb[TCA_VLAN_PUSH_ETH_DST],
	252	ETH_ALEN);
	253	nla_memcpy(&p->tcfv_push_src, tb[TCA_VLAN_PUSH_ETH_SRC],
	254	ETH_ALEN);
	255	}
	256
653cd284	257	spin_lock_bh(&v->tcf_lock);
7e0c8892	258	goto_ch = tcf_action_set_ctrlact(*a, parm->action, goto_ch);
445d3749	259	p = rcu_replace_pointer(v->vlan_p, p, lockdep_is_held(&v->tcf_lock));
653cd284	260	spin_unlock_bh(&v->tcf_lock);
4c5b9d96	261
7e0c8892 DC	262	if (goto_ch)
7e0c8892 DC	263	tcf_chain_put_by_act(goto_ch);
764e9a24 VB	264	if (p)
764e9a24 VB	265	kfree_rcu(p, rcu);
c7e2b968	266
c7e2b968	267	return ret;
7e0c8892 DC	268	put_chain:
	269	if (goto_ch)
	270	tcf_chain_put_by_act(goto_ch);
	271	release_idr:
	272	tcf_idr_release(*a, bind);
	273	return err;
c7e2b968 JP	274	}
c7e2b968 JP	275
9a63b255	276	static void tcf_vlan_cleanup(struct tc_action *a)
4c5b9d96 MK	277	{
	278	struct tcf_vlan *v = to_vlan(a);
	279	struct tcf_vlan_params *p;
	280
	281	p = rcu_dereference_protected(v->vlan_p, 1);
1edf8abe DC	282	if (p)
1edf8abe DC	283	kfree_rcu(p, rcu);
4c5b9d96 MK	284	}
4c5b9d96 MK	285
c7e2b968 JP	286	static int tcf_vlan_dump(struct sk_buff skb, struct tc_action a,
	287	int bind, int ref)
	288	{
	289	unsigned char *b = skb_tail_pointer(skb);
a85a970a	290	struct tcf_vlan *v = to_vlan(a);
764e9a24	291	struct tcf_vlan_params *p;
c7e2b968 JP	292	struct tc_vlan opt = {
c7e2b968 JP	293	.index = v->tcf_index,
036bb443 VB	294	.refcnt = refcount_read(&v->tcf_refcnt) - ref,
036bb443 VB	295	.bindcnt = atomic_read(&v->tcf_bindcnt) - bind,
c7e2b968 JP	296	};
	297	struct tcf_t t;
	298
653cd284	299	spin_lock_bh(&v->tcf_lock);
764e9a24 VB	300	opt.action = v->tcf_action;
	301	p = rcu_dereference_protected(v->vlan_p, lockdep_is_held(&v->tcf_lock));
	302	opt.v_action = p->tcfv_action;
c7e2b968 JP	303	if (nla_put(skb, TCA_VLAN_PARMS, sizeof(opt), &opt))
	304	goto nla_put_failure;
	305
4c5b9d96 MK	306	if ((p->tcfv_action == TCA_VLAN_ACT_PUSH \|\|
	307	p->tcfv_action == TCA_VLAN_ACT_MODIFY) &&
	308	(nla_put_u16(skb, TCA_VLAN_PUSH_VLAN_ID, p->tcfv_push_vid) \|\|
0b0f43fe	309	nla_put_be16(skb, TCA_VLAN_PUSH_VLAN_PROTOCOL,
4c5b9d96	310	p->tcfv_push_proto) \|\|
8323b20f BS	311	(p->tcfv_push_prio_exists &&
8323b20f BS	312	nla_put_u8(skb, TCA_VLAN_PUSH_VLAN_PRIORITY, p->tcfv_push_prio))))
c7e2b968 JP	313	goto nla_put_failure;
c7e2b968 JP	314
19fbcb36 GN	315	if (p->tcfv_action == TCA_VLAN_ACT_PUSH_ETH) {
	316	if (nla_put(skb, TCA_VLAN_PUSH_ETH_DST, ETH_ALEN,
	317	p->tcfv_push_dst))
	318	goto nla_put_failure;
	319	if (nla_put(skb, TCA_VLAN_PUSH_ETH_SRC, ETH_ALEN,
	320	p->tcfv_push_src))
	321	goto nla_put_failure;
	322	}
	323
48d8ee16	324	tcf_tm_dump(&t, &v->tcf_tm);
9854518e	325	if (nla_put_64bit(skb, TCA_VLAN_TM, sizeof(t), &t, TCA_VLAN_PAD))
c7e2b968	326	goto nla_put_failure;
653cd284	327	spin_unlock_bh(&v->tcf_lock);
764e9a24	328
c7e2b968 JP	329	return skb->len;
	330
	331	nla_put_failure:
653cd284	332	spin_unlock_bh(&v->tcf_lock);
c7e2b968 JP	333	nlmsg_trim(skb, b);
	334	return -1;
	335	}
	336
4b61d3e8 PL	337	static void tcf_vlan_stats_update(struct tc_action *a, u64 bytes, u64 packets,
4b61d3e8 PL	338	u64 drops, u64 lastuse, bool hw)
fa730a3b JP	339	{
	340	struct tcf_vlan *v = to_vlan(a);
	341	struct tcf_t *tm = &v->tcf_tm;
	342
4b61d3e8	343	tcf_action_update_stats(a, bytes, packets, drops, hw);
fa730a3b JP	344	tm->lastuse = max_t(u64, tm->lastuse, lastuse);
	345	}
	346
b35475c5 RM	347	static size_t tcf_vlan_get_fill_size(const struct tc_action *act)
	348	{
	349	return nla_total_size(sizeof(struct tc_vlan))
	350	+ nla_total_size(sizeof(u16)) /* TCA_VLAN_PUSH_VLAN_ID */
	351	+ nla_total_size(sizeof(u16)) /* TCA_VLAN_PUSH_VLAN_PROTOCOL */
	352	+ nla_total_size(sizeof(u8)); /* TCA_VLAN_PUSH_VLAN_PRIORITY */
	353	}
	354
c54e1d92	355	static int tcf_vlan_offload_act_setup(struct tc_action act, void entry_data,
c2ccf84e IS	356	u32 *index_inc, bool bind,
c2ccf84e IS	357	struct netlink_ext_ack *extack)
c54e1d92 BZ	358	{
	359	if (bind) {
	360	struct flow_action_entry *entry = entry_data;
	361
	362	switch (tcf_vlan_action(act)) {
	363	case TCA_VLAN_ACT_PUSH:
	364	entry->id = FLOW_ACTION_VLAN_PUSH;
	365	entry->vlan.vid = tcf_vlan_push_vid(act);
	366	entry->vlan.proto = tcf_vlan_push_proto(act);
	367	entry->vlan.prio = tcf_vlan_push_prio(act);
	368	break;
	369	case TCA_VLAN_ACT_POP:
	370	entry->id = FLOW_ACTION_VLAN_POP;
	371	break;
	372	case TCA_VLAN_ACT_MODIFY:
	373	entry->id = FLOW_ACTION_VLAN_MANGLE;
	374	entry->vlan.vid = tcf_vlan_push_vid(act);
	375	entry->vlan.proto = tcf_vlan_push_proto(act);
	376	entry->vlan.prio = tcf_vlan_push_prio(act);
	377	break;
ab95465c MD	378	case TCA_VLAN_ACT_POP_ETH:
	379	entry->id = FLOW_ACTION_VLAN_POP_ETH;
	380	break;
	381	case TCA_VLAN_ACT_PUSH_ETH:
	382	entry->id = FLOW_ACTION_VLAN_PUSH_ETH;
	383	tcf_vlan_push_eth(entry->vlan_push_eth.src, entry->vlan_push_eth.dst, act);
	384	break;
c54e1d92	385	default:
f8fab316	386	NL_SET_ERR_MSG_MOD(extack, "Unsupported vlan action mode offload");
c54e1d92 BZ	387	return -EOPNOTSUPP;
	388	}
	389	*index_inc = 1;
	390	} else {
8cbfe939 BZ	391	struct flow_offload_action *fl_action = entry_data;
	392
	393	switch (tcf_vlan_action(act)) {
	394	case TCA_VLAN_ACT_PUSH:
	395	fl_action->id = FLOW_ACTION_VLAN_PUSH;
	396	break;
	397	case TCA_VLAN_ACT_POP:
	398	fl_action->id = FLOW_ACTION_VLAN_POP;
	399	break;
	400	case TCA_VLAN_ACT_MODIFY:
	401	fl_action->id = FLOW_ACTION_VLAN_MANGLE;
	402	break;
ab95465c MD	403	case TCA_VLAN_ACT_POP_ETH:
	404	fl_action->id = FLOW_ACTION_VLAN_POP_ETH;
	405	break;
	406	case TCA_VLAN_ACT_PUSH_ETH:
	407	fl_action->id = FLOW_ACTION_VLAN_PUSH_ETH;
	408	break;
8cbfe939 BZ	409	default:
	410	return -EOPNOTSUPP;
	411	}
c54e1d92 BZ	412	}
	413
	414	return 0;
	415	}
	416
c7e2b968 JP	417	static struct tc_action_ops act_vlan_ops = {
c7e2b968 JP	418	.kind = "vlan",
eddd2cf1	419	.id = TCA_ID_VLAN,
c7e2b968	420	.owner = THIS_MODULE,
8aa7f22e	421	.act = tcf_vlan_act,
c7e2b968 JP	422	.dump = tcf_vlan_dump,
c7e2b968 JP	423	.init = tcf_vlan_init,
4c5b9d96	424	.cleanup = tcf_vlan_cleanup,
fa730a3b	425	.stats_update = tcf_vlan_stats_update,
b35475c5	426	.get_fill_size = tcf_vlan_get_fill_size,
c54e1d92	427	.offload_act_setup = tcf_vlan_offload_act_setup,
a85a970a	428	.size = sizeof(struct tcf_vlan),
ddf97ccd	429	};
241a94ab	430	MODULE_ALIAS_NET_ACT("vlan");
ddf97ccd WC	431
	432	static __net_init int vlan_init_net(struct net *net)
	433	{
acd0a7ab	434	struct tc_action_net *tn = net_generic(net, act_vlan_ops.net_id);
ddf97ccd	435
981471bd	436	return tc_action_net_init(net, tn, &act_vlan_ops);
ddf97ccd WC	437	}
ddf97ccd WC	438
039af9c6	439	static void __net_exit vlan_exit_net(struct list_head *net_list)
ddf97ccd	440	{
acd0a7ab	441	tc_action_net_exit(net_list, act_vlan_ops.net_id);
ddf97ccd WC	442	}
	443
	444	static struct pernet_operations vlan_net_ops = {
	445	.init = vlan_init_net,
039af9c6	446	.exit_batch = vlan_exit_net,
acd0a7ab	447	.id = &act_vlan_ops.net_id,
ddf97ccd	448	.size = sizeof(struct tc_action_net),
c7e2b968 JP	449	};
	450
	451	static int __init vlan_init_module(void)
	452	{
ddf97ccd	453	return tcf_register_action(&act_vlan_ops, &vlan_net_ops);
c7e2b968 JP	454	}
	455
	456	static void __exit vlan_cleanup_module(void)
	457	{
ddf97ccd	458	tcf_unregister_action(&act_vlan_ops, &vlan_net_ops);
c7e2b968 JP	459	}
	460
	461	module_init(vlan_init_module);
	462	module_exit(vlan_cleanup_module);
	463
	464	MODULE_AUTHOR("Jiri Pirko <jiri@resnulli.us>");
	465	MODULE_DESCRIPTION("vlan manipulation actions");
	466	MODULE_LICENSE("GPL v2");