[mirror_ubuntu-zesty-kernel.git] / net / bridge / br_vlan.c

#include <linux/kernel.h>
#include <linux/netdevice.h>
#include <linux/rtnetlink.h>
#include <linux/slab.h>

#include "br_private.h"

static void __vlan_add_pvid(struct net_port_vlans *v, u16 vid)
{
	if (v->pvid == vid)
		return;

	smp_wmb();
	v->pvid = vid;
}

static void __vlan_delete_pvid(struct net_port_vlans *v, u16 vid)
{
	if (v->pvid != vid)
		return;

	smp_wmb();
	v->pvid = 0;
}

static void __vlan_add_flags(struct net_port_vlans *v, u16 vid, u16 flags)
{
	if (flags & BRIDGE_VLAN_INFO_PVID)
		__vlan_add_pvid(v, vid);

	if (flags & BRIDGE_VLAN_INFO_UNTAGGED)
		set_bit(vid, v->untagged_bitmap);
}

static int __vlan_add(struct net_port_vlans *v, u16 vid, u16 flags)
{
	const struct net_device_ops *ops;
	struct net_bridge_port *p = NULL;
	struct net_bridge *br;
	struct net_device *dev;
	int err;

	if (test_bit(vid, v->vlan_bitmap)) {
		__vlan_add_flags(v, vid, flags);
		return 0;
	}

	if (v->port_idx) {
		p = v->parent.port;
		br = p->br;
		dev = p->dev;
	} else {
		br = v->parent.br;
		dev = br->dev;
	}
	ops = dev->netdev_ops;

	if (p && (dev->features & NETIF_F_HW_VLAN_CTAG_FILTER)) {
		/* Add VLAN to the device filter if it is supported.
		 * Stricly speaking, this is not necessary now, since
		 * devices are made promiscuous by the bridge, but if
		 * that ever changes this code will allow tagged
		 * traffic to enter the bridge.
		 */
		err = ops->ndo_vlan_rx_add_vid(dev, htons(ETH_P_8021Q),
					       vid);
		if (err)
			return err;
	}

	err = br_fdb_insert(br, p, dev->dev_addr, vid);
	if (err) {
		br_err(br, "failed insert local address into bridge "
		       "forwarding table\n");
		goto out_filt;
	}

	set_bit(vid, v->vlan_bitmap);
	v->num_vlans++;
	__vlan_add_flags(v, vid, flags);

	return 0;

out_filt:
	if (p && (dev->features & NETIF_F_HW_VLAN_CTAG_FILTER))
		ops->ndo_vlan_rx_kill_vid(dev, htons(ETH_P_8021Q), vid);
	return err;
}

static int __vlan_del(struct net_port_vlans *v, u16 vid)
{
	if (!test_bit(vid, v->vlan_bitmap))
		return -EINVAL;

	__vlan_delete_pvid(v, vid);
	clear_bit(vid, v->untagged_bitmap);

	if (v->port_idx) {
		struct net_device *dev = v->parent.port->dev;
		const struct net_device_ops *ops = dev->netdev_ops;

		if (dev->features & NETIF_F_HW_VLAN_CTAG_FILTER)
			ops->ndo_vlan_rx_kill_vid(dev, htons(ETH_P_8021Q), vid);
	}

	clear_bit(vid, v->vlan_bitmap);
	v->num_vlans--;
	if (bitmap_empty(v->vlan_bitmap, VLAN_N_VID)) {
		if (v->port_idx)
			rcu_assign_pointer(v->parent.port->vlan_info, NULL);
		else
			rcu_assign_pointer(v->parent.br->vlan_info, NULL);
		kfree_rcu(v, rcu);
	}
	return 0;
}

static void __vlan_flush(struct net_port_vlans *v)
{
	smp_wmb();
	v->pvid = 0;
	bitmap_zero(v->vlan_bitmap, VLAN_N_VID);
	if (v->port_idx)
		rcu_assign_pointer(v->parent.port->vlan_info, NULL);
	else
		rcu_assign_pointer(v->parent.br->vlan_info, NULL);
	kfree_rcu(v, rcu);
}

/* Strip the tag from the packet.  Will return skb with tci set 0.  */
static struct sk_buff *br_vlan_untag(struct sk_buff *skb)
{
	if (skb->protocol != htons(ETH_P_8021Q)) {
		skb->vlan_tci = 0;
		return skb;
	}

	skb->vlan_tci = 0;
	skb = vlan_untag(skb);
	if (skb)
		skb->vlan_tci = 0;

	return skb;
}

struct sk_buff *br_handle_vlan(struct net_bridge *br,
			       const struct net_port_vlans *pv,
			       struct sk_buff *skb)
{
	u16 vid;

	if (!br->vlan_enabled)
		goto out;

	/* At this point, we know that the frame was filtered and contains
	 * a valid vlan id.  If the vlan id is set in the untagged bitmap,
	 * send untagged; otherwise, send taged.
	 */
	br_vlan_get_tag(skb, &vid);
	if (test_bit(vid, pv->untagged_bitmap))
		skb = br_vlan_untag(skb);
	else {
		/* Egress policy says "send tagged".  If output device
		 * is the  bridge, we need to add the VLAN header
		 * ourselves since we'll be going through the RX path.
		 * Sending to ports puts the frame on the TX path and
		 * we let dev_hard_start_xmit() add the header.
		 */
		if (skb->protocol != htons(ETH_P_8021Q) &&
		    pv->port_idx == 0) {
			/* vlan_put_tag expects skb->data to point to
			 * mac header.
			 */
			skb_push(skb, ETH_HLEN);
			skb = __vlan_put_tag(skb, skb->vlan_proto, skb->vlan_tci);
			if (!skb)
				goto out;
			/* put skb->data back to where it was */
			skb_pull(skb, ETH_HLEN);
			skb->vlan_tci = 0;
		}
	}

out:
	return skb;
}

/* Called under RCU */
bool br_allowed_ingress(struct net_bridge *br, struct net_port_vlans *v,
			struct sk_buff *skb, u16 *vid)
{
	int err;

	/* If VLAN filtering is disabled on the bridge, all packets are
	 * permitted.
	 */
	if (!br->vlan_enabled)
		return true;

	/* If there are no vlan in the permitted list, all packets are
	 * rejected.
	 */
	if (!v)
		return false;

	err = br_vlan_get_tag(skb, vid);
	if (!*vid) {
		u16 pvid = br_get_pvid(v);

		/* Frame had a tag with VID 0 or did not have a tag.
		 * See if pvid is set on this port.  That tells us which
		 * vlan untagged or priority-tagged traffic belongs to.
		 */
		if (pvid == VLAN_N_VID)
			return false;

		/* PVID is set on this port.  Any untagged or priority-tagged
		 * ingress frame is considered to belong to this vlan.
		 */
		if (likely(err))
			/* Untagged Frame. */
			__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), pvid);
		else
			/* Priority-tagged Frame.
			 * At this point, We know that skb->vlan_tci had
			 * VLAN_TAG_PRESENT bit and its VID field was 0x000.
			 * We update only VID field and preserve PCP field.
			 */
			skb->vlan_tci |= pvid;

		return true;
	}

	/* Frame had a valid vlan tag.  See if vlan is allowed */
	if (test_bit(*vid, v->vlan_bitmap))
		return true;

	return false;
}

/* Called under RCU. */
bool br_allowed_egress(struct net_bridge *br,
		       const struct net_port_vlans *v,
		       const struct sk_buff *skb)
{
	u16 vid;

	if (!br->vlan_enabled)
		return true;

	if (!v)
		return false;

	br_vlan_get_tag(skb, &vid);
	if (test_bit(vid, v->vlan_bitmap))
		return true;

	return false;
}

/* Must be protected by RTNL.
 * Must be called with vid in range from 1 to 4094 inclusive.
 */
int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags)
{
	struct net_port_vlans *pv = NULL;
	int err;

	ASSERT_RTNL();

	pv = rtnl_dereference(br->vlan_info);
	if (pv)
		return __vlan_add(pv, vid, flags);

	/* Create port vlan infomration
	 */
	pv = kzalloc(sizeof(*pv), GFP_KERNEL);
	if (!pv)
		return -ENOMEM;

	pv->parent.br = br;
	err = __vlan_add(pv, vid, flags);
	if (err)
		goto out;

	rcu_assign_pointer(br->vlan_info, pv);
	return 0;
out:
	kfree(pv);
	return err;
}

/* Must be protected by RTNL.
 * Must be called with vid in range from 1 to 4094 inclusive.
 */
int br_vlan_delete(struct net_bridge *br, u16 vid)
{
	struct net_port_vlans *pv;

	ASSERT_RTNL();

	pv = rtnl_dereference(br->vlan_info);
	if (!pv)
		return -EINVAL;

	spin_lock_bh(&br->hash_lock);
	fdb_delete_by_addr(br, br->dev->dev_addr, vid);
	spin_unlock_bh(&br->hash_lock);

	__vlan_del(pv, vid);
	return 0;
}

void br_vlan_flush(struct net_bridge *br)
{
	struct net_port_vlans *pv;

	ASSERT_RTNL();
	pv = rtnl_dereference(br->vlan_info);
	if (!pv)
		return;

	__vlan_flush(pv);
}

int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val)
{
	if (!rtnl_trylock())
		return restart_syscall();

	if (br->vlan_enabled == val)
		goto unlock;

	br->vlan_enabled = val;

unlock:
	rtnl_unlock();
	return 0;
}

/* Must be protected by RTNL.
 * Must be called with vid in range from 1 to 4094 inclusive.
 */
int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags)
{
	struct net_port_vlans *pv = NULL;
	int err;

	ASSERT_RTNL();

	pv = rtnl_dereference(port->vlan_info);
	if (pv)
		return __vlan_add(pv, vid, flags);

	/* Create port vlan infomration
	 */
	pv = kzalloc(sizeof(*pv), GFP_KERNEL);
	if (!pv) {
		err = -ENOMEM;
		goto clean_up;
	}

	pv->port_idx = port->port_no;
	pv->parent.port = port;
	err = __vlan_add(pv, vid, flags);
	if (err)
		goto clean_up;

	rcu_assign_pointer(port->vlan_info, pv);
	return 0;

clean_up:
	kfree(pv);
	return err;
}

/* Must be protected by RTNL.
 * Must be called with vid in range from 1 to 4094 inclusive.
 */
int nbp_vlan_delete(struct net_bridge_port *port, u16 vid)
{
	struct net_port_vlans *pv;

	ASSERT_RTNL();

	pv = rtnl_dereference(port->vlan_info);
	if (!pv)
		return -EINVAL;

	spin_lock_bh(&port->br->hash_lock);
	fdb_delete_by_addr(port->br, port->dev->dev_addr, vid);
	spin_unlock_bh(&port->br->hash_lock);

	return __vlan_del(pv, vid);
}

void nbp_vlan_flush(struct net_bridge_port *port)
{
	struct net_port_vlans *pv;

	ASSERT_RTNL();

	pv = rtnl_dereference(port->vlan_info);
	if (!pv)
		return;

	__vlan_flush(pv);
}

bool nbp_vlan_find(struct net_bridge_port *port, u16 vid)
{
	struct net_port_vlans *pv;
	bool found = false;

	rcu_read_lock();
	pv = rcu_dereference(port->vlan_info);

	if (!pv)
		goto out;

	if (test_bit(vid, pv->vlan_bitmap))
		found = true;

out:
	rcu_read_unlock();
	return found;
}
Commit	Line	Data
243a2e63 VY	1	#include <linux/kernel.h>
	2	#include <linux/netdevice.h>
	3	#include <linux/rtnetlink.h>
	4	#include <linux/slab.h>
	5
	6	#include "br_private.h"
	7
552406c4 VY	8	static void __vlan_add_pvid(struct net_port_vlans *v, u16 vid)
	9	{
	10	if (v->pvid == vid)
	11	return;
	12
	13	smp_wmb();
	14	v->pvid = vid;
	15	}
	16
	17	static void __vlan_delete_pvid(struct net_port_vlans *v, u16 vid)
	18	{
	19	if (v->pvid != vid)
	20	return;
	21
	22	smp_wmb();
	23	v->pvid = 0;
	24	}
	25
35e03f3a VY	26	static void __vlan_add_flags(struct net_port_vlans *v, u16 vid, u16 flags)
	27	{
	28	if (flags & BRIDGE_VLAN_INFO_PVID)
	29	__vlan_add_pvid(v, vid);
	30
	31	if (flags & BRIDGE_VLAN_INFO_UNTAGGED)
	32	set_bit(vid, v->untagged_bitmap);
	33	}
	34
552406c4	35	static int __vlan_add(struct net_port_vlans *v, u16 vid, u16 flags)
243a2e63	36	{
80d5c368	37	const struct net_device_ops *ops;
bc9a25d2 VY	38	struct net_bridge_port *p = NULL;
	39	struct net_bridge *br;
	40	struct net_device *dev;
243a2e63 VY	41	int err;
243a2e63 VY	42
552406c4	43	if (test_bit(vid, v->vlan_bitmap)) {
35e03f3a	44	__vlan_add_flags(v, vid, flags);
552406c4 VY	45	return 0;
552406c4 VY	46	}
243a2e63	47
8adff41c TM	48	if (v->port_idx) {
	49	p = v->parent.port;
	50	br = p->br;
	51	dev = p->dev;
	52	} else {
	53	br = v->parent.br;
	54	dev = br->dev;
	55	}
	56	ops = dev->netdev_ops;
	57
	58	if (p && (dev->features & NETIF_F_HW_VLAN_CTAG_FILTER)) {
	59	/* Add VLAN to the device filter if it is supported.
	60	* Stricly speaking, this is not necessary now, since
	61	* devices are made promiscuous by the bridge, but if
	62	* that ever changes this code will allow tagged
	63	* traffic to enter the bridge.
	64	*/
	65	err = ops->ndo_vlan_rx_add_vid(dev, htons(ETH_P_8021Q),
	66	vid);
	67	if (err)
	68	return err;
	69	}
bc9a25d2	70
8adff41c TM	71	err = br_fdb_insert(br, p, dev->dev_addr, vid);
	72	if (err) {
	73	br_err(br, "failed insert local address into bridge "
	74	"forwarding table\n");
	75	goto out_filt;
243a2e63 VY	76	}
	77
	78	set_bit(vid, v->vlan_bitmap);
6cbdceeb	79	v->num_vlans++;
35e03f3a	80	__vlan_add_flags(v, vid, flags);
552406c4	81
243a2e63	82	return 0;
bc9a25d2 VY	83
bc9a25d2 VY	84	out_filt:
f646968f	85	if (p && (dev->features & NETIF_F_HW_VLAN_CTAG_FILTER))
80d5c368	86	ops->ndo_vlan_rx_kill_vid(dev, htons(ETH_P_8021Q), vid);
bc9a25d2	87	return err;
243a2e63 VY	88	}
	89
	90	static int __vlan_del(struct net_port_vlans *v, u16 vid)
	91	{
	92	if (!test_bit(vid, v->vlan_bitmap))
	93	return -EINVAL;
	94
552406c4	95	__vlan_delete_pvid(v, vid);
35e03f3a	96	clear_bit(vid, v->untagged_bitmap);
552406c4	97
8adff41c	98	if (v->port_idx) {
243a2e63	99	struct net_device *dev = v->parent.port->dev;
80d5c368	100	const struct net_device_ops *ops = dev->netdev_ops;
243a2e63	101
f646968f	102	if (dev->features & NETIF_F_HW_VLAN_CTAG_FILTER)
80d5c368	103	ops->ndo_vlan_rx_kill_vid(dev, htons(ETH_P_8021Q), vid);
243a2e63 VY	104	}
	105
	106	clear_bit(vid, v->vlan_bitmap);
6cbdceeb	107	v->num_vlans--;
ef40b7ef	108	if (bitmap_empty(v->vlan_bitmap, VLAN_N_VID)) {
243a2e63 VY	109	if (v->port_idx)
	110	rcu_assign_pointer(v->parent.port->vlan_info, NULL);
	111	else
	112	rcu_assign_pointer(v->parent.br->vlan_info, NULL);
	113	kfree_rcu(v, rcu);
	114	}
	115	return 0;
	116	}
	117
	118	static void __vlan_flush(struct net_port_vlans *v)
	119	{
552406c4 VY	120	smp_wmb();
552406c4 VY	121	v->pvid = 0;
ef40b7ef	122	bitmap_zero(v->vlan_bitmap, VLAN_N_VID);
243a2e63 VY	123	if (v->port_idx)
	124	rcu_assign_pointer(v->parent.port->vlan_info, NULL);
	125	else
	126	rcu_assign_pointer(v->parent.br->vlan_info, NULL);
	127	kfree_rcu(v, rcu);
	128	}
	129
78851988 VY	130	/* Strip the tag from the packet. Will return skb with tci set 0. */
	131	static struct sk_buff br_vlan_untag(struct sk_buff skb)
	132	{
	133	if (skb->protocol != htons(ETH_P_8021Q)) {
	134	skb->vlan_tci = 0;
	135	return skb;
	136	}
	137
	138	skb->vlan_tci = 0;
	139	skb = vlan_untag(skb);
	140	if (skb)
	141	skb->vlan_tci = 0;
	142
	143	return skb;
	144	}
	145
	146	struct sk_buff br_handle_vlan(struct net_bridge br,
	147	const struct net_port_vlans *pv,
	148	struct sk_buff *skb)
a37b85c9 VY	149	{
	150	u16 vid;
	151
78851988 VY	152	if (!br->vlan_enabled)
	153	goto out;
	154
	155	/* At this point, we know that the frame was filtered and contains
35e03f3a	156	* a valid vlan id. If the vlan id is set in the untagged bitmap,
78851988 VY	157	* send untagged; otherwise, send taged.
	158	*/
	159	br_vlan_get_tag(skb, &vid);
35e03f3a	160	if (test_bit(vid, pv->untagged_bitmap))
78851988 VY	161	skb = br_vlan_untag(skb);
	162	else {
	163	/* Egress policy says "send tagged". If output device
	164	* is the bridge, we need to add the VLAN header
	165	* ourselves since we'll be going through the RX path.
	166	* Sending to ports puts the frame on the TX path and
	167	* we let dev_hard_start_xmit() add the header.
	168	*/
	169	if (skb->protocol != htons(ETH_P_8021Q) &&
	170	pv->port_idx == 0) {
	171	/* vlan_put_tag expects skb->data to point to
	172	* mac header.
	173	*/
	174	skb_push(skb, ETH_HLEN);
86a9bad3	175	skb = __vlan_put_tag(skb, skb->vlan_proto, skb->vlan_tci);
78851988 VY	176	if (!skb)
	177	goto out;
	178	/* put skb->data back to where it was */
	179	skb_pull(skb, ETH_HLEN);
	180	skb->vlan_tci = 0;
	181	}
	182	}
	183
	184	out:
	185	return skb;
	186	}
	187
	188	/* Called under RCU */
	189	bool br_allowed_ingress(struct net_bridge br, struct net_port_vlans v,
	190	struct sk_buff skb, u16 vid)
	191	{
b90356ce TM	192	int err;
b90356ce TM	193
a37b85c9 VY	194	/* If VLAN filtering is disabled on the bridge, all packets are
	195	* permitted.
	196	*/
	197	if (!br->vlan_enabled)
	198	return true;
	199
	200	/* If there are no vlan in the permitted list, all packets are
	201	* rejected.
	202	*/
	203	if (!v)
	204	return false;
	205
b90356ce TM	206	err = br_vlan_get_tag(skb, vid);
b90356ce TM	207	if (!*vid) {
78851988 VY	208	u16 pvid = br_get_pvid(v);
78851988 VY	209
b90356ce TM	210	/* Frame had a tag with VID 0 or did not have a tag.
	211	* See if pvid is set on this port. That tells us which
	212	* vlan untagged or priority-tagged traffic belongs to.
78851988 VY	213	*/
	214	if (pvid == VLAN_N_VID)
	215	return false;
	216
b90356ce TM	217	/* PVID is set on this port. Any untagged or priority-tagged
b90356ce TM	218	* ingress frame is considered to belong to this vlan.
78851988	219	*/
b90356ce TM	220	if (likely(err))
	221	/* Untagged Frame. */
	222	__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), pvid);
	223	else
	224	/* Priority-tagged Frame.
	225	* At this point, We know that skb->vlan_tci had
	226	* VLAN_TAG_PRESENT bit and its VID field was 0x000.
	227	* We update only VID field and preserve PCP field.
	228	*/
	229	skb->vlan_tci \|= pvid;
	230
78851988 VY	231	return true;
	232	}
	233
	234	/* Frame had a valid vlan tag. See if vlan is allowed */
	235	if (test_bit(*vid, v->vlan_bitmap))
a37b85c9 VY	236	return true;
	237
	238	return false;
	239	}
	240
85f46c6b VY	241	/* Called under RCU. */
	242	bool br_allowed_egress(struct net_bridge *br,
	243	const struct net_port_vlans *v,
	244	const struct sk_buff *skb)
	245	{
	246	u16 vid;
	247
	248	if (!br->vlan_enabled)
	249	return true;
	250
	251	if (!v)
	252	return false;
	253
	254	br_vlan_get_tag(skb, &vid);
	255	if (test_bit(vid, v->vlan_bitmap))
	256	return true;
	257
	258	return false;
	259	}
	260
8adff41c TM	261	/* Must be protected by RTNL.
	262	* Must be called with vid in range from 1 to 4094 inclusive.
	263	*/
552406c4	264	int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags)
243a2e63 VY	265	{
	266	struct net_port_vlans *pv = NULL;
	267	int err;
	268
	269	ASSERT_RTNL();
	270
	271	pv = rtnl_dereference(br->vlan_info);
	272	if (pv)
552406c4	273	return __vlan_add(pv, vid, flags);
243a2e63 VY	274
	275	/* Create port vlan infomration
	276	*/
	277	pv = kzalloc(sizeof(*pv), GFP_KERNEL);
	278	if (!pv)
	279	return -ENOMEM;
	280
	281	pv->parent.br = br;
552406c4	282	err = __vlan_add(pv, vid, flags);
243a2e63 VY	283	if (err)
	284	goto out;
	285
	286	rcu_assign_pointer(br->vlan_info, pv);
	287	return 0;
	288	out:
	289	kfree(pv);
	290	return err;
	291	}
	292
8adff41c TM	293	/* Must be protected by RTNL.
	294	* Must be called with vid in range from 1 to 4094 inclusive.
	295	*/
243a2e63 VY	296	int br_vlan_delete(struct net_bridge *br, u16 vid)
	297	{
	298	struct net_port_vlans *pv;
	299
	300	ASSERT_RTNL();
	301
	302	pv = rtnl_dereference(br->vlan_info);
	303	if (!pv)
	304	return -EINVAL;
	305
8adff41c TM	306	spin_lock_bh(&br->hash_lock);
	307	fdb_delete_by_addr(br, br->dev->dev_addr, vid);
	308	spin_unlock_bh(&br->hash_lock);
bc9a25d2	309
243a2e63 VY	310	__vlan_del(pv, vid);
	311	return 0;
	312	}
	313
	314	void br_vlan_flush(struct net_bridge *br)
	315	{
	316	struct net_port_vlans *pv;
	317
	318	ASSERT_RTNL();
243a2e63 VY	319	pv = rtnl_dereference(br->vlan_info);
	320	if (!pv)
	321	return;
	322
	323	__vlan_flush(pv);
	324	}
	325
	326	int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val)
	327	{
	328	if (!rtnl_trylock())
	329	return restart_syscall();
	330
	331	if (br->vlan_enabled == val)
	332	goto unlock;
	333
	334	br->vlan_enabled = val;
	335
	336	unlock:
	337	rtnl_unlock();
	338	return 0;
	339	}
	340
8adff41c TM	341	/* Must be protected by RTNL.
	342	* Must be called with vid in range from 1 to 4094 inclusive.
	343	*/
552406c4	344	int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags)
243a2e63 VY	345	{
	346	struct net_port_vlans *pv = NULL;
	347	int err;
	348
	349	ASSERT_RTNL();
	350
	351	pv = rtnl_dereference(port->vlan_info);
	352	if (pv)
552406c4	353	return __vlan_add(pv, vid, flags);
243a2e63 VY	354
	355	/* Create port vlan infomration
	356	*/
	357	pv = kzalloc(sizeof(*pv), GFP_KERNEL);
	358	if (!pv) {
	359	err = -ENOMEM;
	360	goto clean_up;
	361	}
	362
	363	pv->port_idx = port->port_no;
	364	pv->parent.port = port;
552406c4	365	err = __vlan_add(pv, vid, flags);
243a2e63 VY	366	if (err)
	367	goto clean_up;
	368
	369	rcu_assign_pointer(port->vlan_info, pv);
	370	return 0;
	371
	372	clean_up:
	373	kfree(pv);
	374	return err;
	375	}
	376
8adff41c TM	377	/* Must be protected by RTNL.
	378	* Must be called with vid in range from 1 to 4094 inclusive.
	379	*/
243a2e63 VY	380	int nbp_vlan_delete(struct net_bridge_port *port, u16 vid)
	381	{
	382	struct net_port_vlans *pv;
	383
	384	ASSERT_RTNL();
	385
	386	pv = rtnl_dereference(port->vlan_info);
	387	if (!pv)
	388	return -EINVAL;
	389
8adff41c TM	390	spin_lock_bh(&port->br->hash_lock);
	391	fdb_delete_by_addr(port->br, port->dev->dev_addr, vid);
	392	spin_unlock_bh(&port->br->hash_lock);
bc9a25d2	393
243a2e63 VY	394	return __vlan_del(pv, vid);
	395	}
	396
	397	void nbp_vlan_flush(struct net_bridge_port *port)
	398	{
	399	struct net_port_vlans *pv;
	400
	401	ASSERT_RTNL();
	402
	403	pv = rtnl_dereference(port->vlan_info);
	404	if (!pv)
	405	return;
	406
	407	__vlan_flush(pv);
	408	}
bc9a25d2 VY	409
	410	bool nbp_vlan_find(struct net_bridge_port *port, u16 vid)
	411	{
	412	struct net_port_vlans *pv;
	413	bool found = false;
	414
	415	rcu_read_lock();
	416	pv = rcu_dereference(port->vlan_info);
	417
	418	if (!pv)
	419	goto out;
	420
	421	if (test_bit(vid, pv->vlan_bitmap))
	422	found = true;
	423
	424	out:
	425	rcu_read_unlock();
	426	return found;
	427	}