[deliverable/linux.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)
{
	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;
	}

	if (p) {
		/* 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 = vlan_vid_add(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)
		vlan_vid_del(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)
		vlan_vid_del(v->parent.port->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_INIT_POINTER(v->parent.port->vlan_info, NULL);
		else
			RCU_INIT_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_INIT_POINTER(v->parent.port->vlan_info, NULL);
	else
		RCU_INIT_POINTER(v->parent.br->vlan_info, NULL);
	kfree_rcu(v, rcu);
}

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;

	/* Vlan filter table must be configured at this point.  The
	 * only exception is the bridge is set in promisc mode and the
	 * packet is destined for the bridge device.  In this case
	 * pass the packet as is.
	 */
	if (!pv) {
		if ((br->dev->flags & IFF_PROMISC) && skb->dev == br->dev) {
			goto out;
		} else {
			kfree_skb(skb);
			return NULL;
		}
	}

	/* 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 tagged.
	 */
	br_vlan_get_tag(skb, &vid);
	if (test_bit(vid, pv->untagged_bitmap))
		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;

	/* If vlan tx offload is disabled on bridge device and frame was
	 * sent from vlan device on the bridge device, it does not have
	 * HW accelerated vlan tag.
	 */
	if (unlikely(!vlan_tx_tag_present(skb) &&
		     (skb->protocol == htons(ETH_P_8021Q) ||
		      skb->protocol == htons(ETH_P_8021AD)))) {
		skb = vlan_untag(skb);
		if (unlikely(!skb))
			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.
		 */
		*vid = pvid;
		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;

	br_fdb_find_delete_local(br, NULL, br->dev->dev_addr, vid);

	__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);
}

bool br_vlan_find(struct net_bridge *br, u16 vid)
{
	struct net_port_vlans *pv;
	bool found = false;

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

	if (!pv)
		goto out;

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

out:
	rcu_read_unlock();
	return found;
}

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;

	br_fdb_find_delete_local(port->br, port, port->dev->dev_addr, vid);

	return __vlan_del(pv, vid);
}

void nbp_vlan_flush(struct net_bridge_port *port)
{
	struct net_port_vlans *pv;
	u16 vid;

	ASSERT_RTNL();

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

	for_each_set_bit(vid, pv->vlan_bitmap, VLAN_N_VID)
		vlan_vid_del(port->dev, htons(ETH_P_8021Q), vid);

	__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	{
bc9a25d2 VY	37	struct net_bridge_port *p = NULL;
	38	struct net_bridge *br;
	39	struct net_device *dev;
243a2e63 VY	40	int err;
243a2e63 VY	41
552406c4	42	if (test_bit(vid, v->vlan_bitmap)) {
35e03f3a	43	__vlan_add_flags(v, vid, flags);
552406c4 VY	44	return 0;
552406c4 VY	45	}
243a2e63	46
8adff41c TM	47	if (v->port_idx) {
	48	p = v->parent.port;
	49	br = p->br;
	50	dev = p->dev;
	51	} else {
	52	br = v->parent.br;
	53	dev = br->dev;
	54	}
8adff41c	55
19236837	56	if (p) {
8adff41c TM	57	/* Add VLAN to the device filter if it is supported.
	58	* Stricly speaking, this is not necessary now, since
	59	* devices are made promiscuous by the bridge, but if
	60	* that ever changes this code will allow tagged
	61	* traffic to enter the bridge.
	62	*/
19236837	63	err = vlan_vid_add(dev, htons(ETH_P_8021Q), vid);
8adff41c TM	64	if (err)
	65	return err;
	66	}
bc9a25d2	67
8adff41c TM	68	err = br_fdb_insert(br, p, dev->dev_addr, vid);
	69	if (err) {
	70	br_err(br, "failed insert local address into bridge "
	71	"forwarding table\n");
	72	goto out_filt;
243a2e63 VY	73	}
	74
	75	set_bit(vid, v->vlan_bitmap);
6cbdceeb	76	v->num_vlans++;
35e03f3a	77	__vlan_add_flags(v, vid, flags);
552406c4	78
243a2e63	79	return 0;
bc9a25d2 VY	80
bc9a25d2 VY	81	out_filt:
19236837 TM	82	if (p)
19236837 TM	83	vlan_vid_del(dev, htons(ETH_P_8021Q), vid);
bc9a25d2	84	return err;
243a2e63 VY	85	}
	86
	87	static int __vlan_del(struct net_port_vlans *v, u16 vid)
	88	{
	89	if (!test_bit(vid, v->vlan_bitmap))
	90	return -EINVAL;
	91
552406c4	92	__vlan_delete_pvid(v, vid);
35e03f3a	93	clear_bit(vid, v->untagged_bitmap);
552406c4	94
19236837 TM	95	if (v->port_idx)
19236837 TM	96	vlan_vid_del(v->parent.port->dev, htons(ETH_P_8021Q), vid);
243a2e63 VY	97
243a2e63 VY	98	clear_bit(vid, v->vlan_bitmap);
6cbdceeb	99	v->num_vlans--;
ef40b7ef	100	if (bitmap_empty(v->vlan_bitmap, VLAN_N_VID)) {
243a2e63	101	if (v->port_idx)
cd18721e	102	RCU_INIT_POINTER(v->parent.port->vlan_info, NULL);
243a2e63	103	else
cd18721e	104	RCU_INIT_POINTER(v->parent.br->vlan_info, NULL);
243a2e63 VY	105	kfree_rcu(v, rcu);
	106	}
	107	return 0;
	108	}
	109
	110	static void __vlan_flush(struct net_port_vlans *v)
	111	{
552406c4 VY	112	smp_wmb();
552406c4 VY	113	v->pvid = 0;
ef40b7ef	114	bitmap_zero(v->vlan_bitmap, VLAN_N_VID);
243a2e63	115	if (v->port_idx)
cd18721e	116	RCU_INIT_POINTER(v->parent.port->vlan_info, NULL);
243a2e63	117	else
cd18721e	118	RCU_INIT_POINTER(v->parent.br->vlan_info, NULL);
243a2e63 VY	119	kfree_rcu(v, rcu);
	120	}
	121
78851988 VY	122	struct sk_buff br_handle_vlan(struct net_bridge br,
	123	const struct net_port_vlans *pv,
	124	struct sk_buff *skb)
a37b85c9 VY	125	{
	126	u16 vid;
	127
78851988 VY	128	if (!br->vlan_enabled)
	129	goto out;
	130
fc92f745 VY	131	/* Vlan filter table must be configured at this point. The
	132	* only exception is the bridge is set in promisc mode and the
	133	* packet is destined for the bridge device. In this case
	134	* pass the packet as is.
	135	*/
	136	if (!pv) {
	137	if ((br->dev->flags & IFF_PROMISC) && skb->dev == br->dev) {
	138	goto out;
	139	} else {
	140	kfree_skb(skb);
	141	return NULL;
	142	}
	143	}
	144
78851988	145	/* At this point, we know that the frame was filtered and contains
35e03f3a	146	* a valid vlan id. If the vlan id is set in the untagged bitmap,
1a81a2e0	147	* send untagged; otherwise, send tagged.
78851988 VY	148	*/
78851988 VY	149	br_vlan_get_tag(skb, &vid);
35e03f3a	150	if (test_bit(vid, pv->untagged_bitmap))
99b192da	151	skb->vlan_tci = 0;
78851988 VY	152
	153	out:
	154	return skb;
	155	}
	156
	157	/* Called under RCU */
	158	bool br_allowed_ingress(struct net_bridge br, struct net_port_vlans v,
	159	struct sk_buff skb, u16 vid)
	160	{
b90356ce TM	161	int err;
b90356ce TM	162
a37b85c9 VY	163	/* If VLAN filtering is disabled on the bridge, all packets are
	164	* permitted.
	165	*/
	166	if (!br->vlan_enabled)
	167	return true;
	168
	169	/* If there are no vlan in the permitted list, all packets are
	170	* rejected.
	171	*/
	172	if (!v)
	173	return false;
	174
12464bb8 TM	175	/* If vlan tx offload is disabled on bridge device and frame was
	176	* sent from vlan device on the bridge device, it does not have
	177	* HW accelerated vlan tag.
	178	*/
	179	if (unlikely(!vlan_tx_tag_present(skb) &&
	180	(skb->protocol == htons(ETH_P_8021Q) \|\|
	181	skb->protocol == htons(ETH_P_8021AD)))) {
	182	skb = vlan_untag(skb);
	183	if (unlikely(!skb))
	184	return false;
	185	}
	186
b90356ce TM	187	err = br_vlan_get_tag(skb, vid);
b90356ce TM	188	if (!*vid) {
78851988 VY	189	u16 pvid = br_get_pvid(v);
78851988 VY	190
b90356ce TM	191	/* Frame had a tag with VID 0 or did not have a tag.
	192	* See if pvid is set on this port. That tells us which
	193	* vlan untagged or priority-tagged traffic belongs to.
78851988 VY	194	*/
	195	if (pvid == VLAN_N_VID)
	196	return false;
	197
b90356ce TM	198	/* PVID is set on this port. Any untagged or priority-tagged
b90356ce TM	199	* ingress frame is considered to belong to this vlan.
78851988	200	*/
dfb5fa32	201	*vid = pvid;
b90356ce TM	202	if (likely(err))
	203	/* Untagged Frame. */
	204	__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), pvid);
	205	else
	206	/* Priority-tagged Frame.
	207	* At this point, We know that skb->vlan_tci had
	208	* VLAN_TAG_PRESENT bit and its VID field was 0x000.
	209	* We update only VID field and preserve PCP field.
	210	*/
	211	skb->vlan_tci \|= pvid;
	212
78851988 VY	213	return true;
	214	}
	215
	216	/* Frame had a valid vlan tag. See if vlan is allowed */
	217	if (test_bit(*vid, v->vlan_bitmap))
a37b85c9 VY	218	return true;
	219
	220	return false;
	221	}
	222
85f46c6b VY	223	/* Called under RCU. */
	224	bool br_allowed_egress(struct net_bridge *br,
	225	const struct net_port_vlans *v,
	226	const struct sk_buff *skb)
	227	{
	228	u16 vid;
	229
	230	if (!br->vlan_enabled)
	231	return true;
	232
	233	if (!v)
	234	return false;
	235
	236	br_vlan_get_tag(skb, &vid);
	237	if (test_bit(vid, v->vlan_bitmap))
	238	return true;
	239
	240	return false;
	241	}
	242
8adff41c TM	243	/* Must be protected by RTNL.
	244	* Must be called with vid in range from 1 to 4094 inclusive.
	245	*/
552406c4	246	int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags)
243a2e63 VY	247	{
	248	struct net_port_vlans *pv = NULL;
	249	int err;
	250
	251	ASSERT_RTNL();
	252
	253	pv = rtnl_dereference(br->vlan_info);
	254	if (pv)
552406c4	255	return __vlan_add(pv, vid, flags);
243a2e63 VY	256
	257	/* Create port vlan infomration
	258	*/
	259	pv = kzalloc(sizeof(*pv), GFP_KERNEL);
	260	if (!pv)
	261	return -ENOMEM;
	262
	263	pv->parent.br = br;
552406c4	264	err = __vlan_add(pv, vid, flags);
243a2e63 VY	265	if (err)
	266	goto out;
	267
	268	rcu_assign_pointer(br->vlan_info, pv);
	269	return 0;
	270	out:
	271	kfree(pv);
	272	return err;
	273	}
	274
8adff41c TM	275	/* Must be protected by RTNL.
	276	* Must be called with vid in range from 1 to 4094 inclusive.
	277	*/
243a2e63 VY	278	int br_vlan_delete(struct net_bridge *br, u16 vid)
	279	{
	280	struct net_port_vlans *pv;
	281
	282	ASSERT_RTNL();
	283
	284	pv = rtnl_dereference(br->vlan_info);
	285	if (!pv)
	286	return -EINVAL;
	287
424bb9c9	288	br_fdb_find_delete_local(br, NULL, br->dev->dev_addr, vid);
bc9a25d2	289
243a2e63 VY	290	__vlan_del(pv, vid);
	291	return 0;
	292	}
	293
	294	void br_vlan_flush(struct net_bridge *br)
	295	{
	296	struct net_port_vlans *pv;
	297
	298	ASSERT_RTNL();
243a2e63 VY	299	pv = rtnl_dereference(br->vlan_info);
	300	if (!pv)
	301	return;
	302
	303	__vlan_flush(pv);
	304	}
	305
2b292fb4 TM	306	bool br_vlan_find(struct net_bridge *br, u16 vid)
	307	{
	308	struct net_port_vlans *pv;
	309	bool found = false;
	310
	311	rcu_read_lock();
	312	pv = rcu_dereference(br->vlan_info);
	313
	314	if (!pv)
	315	goto out;
	316
	317	if (test_bit(vid, pv->vlan_bitmap))
	318	found = true;
	319
	320	out:
	321	rcu_read_unlock();
	322	return found;
	323	}
	324
243a2e63 VY	325	int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val)
	326	{
	327	if (!rtnl_trylock())
	328	return restart_syscall();
	329
	330	if (br->vlan_enabled == val)
	331	goto unlock;
	332
	333	br->vlan_enabled = val;
	334
	335	unlock:
	336	rtnl_unlock();
	337	return 0;
	338	}
	339
8adff41c TM	340	/* Must be protected by RTNL.
	341	* Must be called with vid in range from 1 to 4094 inclusive.
	342	*/
552406c4	343	int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags)
243a2e63 VY	344	{
	345	struct net_port_vlans *pv = NULL;
	346	int err;
	347
	348	ASSERT_RTNL();
	349
	350	pv = rtnl_dereference(port->vlan_info);
	351	if (pv)
552406c4	352	return __vlan_add(pv, vid, flags);
243a2e63 VY	353
	354	/* Create port vlan infomration
	355	*/
	356	pv = kzalloc(sizeof(*pv), GFP_KERNEL);
	357	if (!pv) {
	358	err = -ENOMEM;
	359	goto clean_up;
	360	}
	361
	362	pv->port_idx = port->port_no;
	363	pv->parent.port = port;
552406c4	364	err = __vlan_add(pv, vid, flags);
243a2e63 VY	365	if (err)
	366	goto clean_up;
	367
	368	rcu_assign_pointer(port->vlan_info, pv);
	369	return 0;
	370
	371	clean_up:
	372	kfree(pv);
	373	return err;
	374	}
	375
8adff41c TM	376	/* Must be protected by RTNL.
	377	* Must be called with vid in range from 1 to 4094 inclusive.
	378	*/
243a2e63 VY	379	int nbp_vlan_delete(struct net_bridge_port *port, u16 vid)
	380	{
	381	struct net_port_vlans *pv;
	382
	383	ASSERT_RTNL();
	384
	385	pv = rtnl_dereference(port->vlan_info);
	386	if (!pv)
	387	return -EINVAL;
	388
424bb9c9	389	br_fdb_find_delete_local(port->br, port, port->dev->dev_addr, vid);
bc9a25d2	390
243a2e63 VY	391	return __vlan_del(pv, vid);
	392	}
	393
	394	void nbp_vlan_flush(struct net_bridge_port *port)
	395	{
	396	struct net_port_vlans *pv;
dbbaf949	397	u16 vid;
243a2e63 VY	398
	399	ASSERT_RTNL();
	400
	401	pv = rtnl_dereference(port->vlan_info);
	402	if (!pv)
	403	return;
	404
dbbaf949 TM	405	for_each_set_bit(vid, pv->vlan_bitmap, VLAN_N_VID)
	406	vlan_vid_del(port->dev, htons(ETH_P_8021Q), vid);
	407
243a2e63 VY	408	__vlan_flush(pv);
243a2e63 VY	409	}
bc9a25d2 VY	410
	411	bool nbp_vlan_find(struct net_bridge_port *port, u16 vid)
	412	{
	413	struct net_port_vlans *pv;
	414	bool found = false;
	415
	416	rcu_read_lock();
	417	pv = rcu_dereference(port->vlan_info);
	418
	419	if (!pv)
	420	goto out;
	421
	422	if (test_bit(vid, pv->vlan_bitmap))
	423	found = true;
	424
	425	out:
	426	rcu_read_unlock();
	427	return found;
	428	}