1243a2e63SVlad Yasevich #include <linux/kernel.h> 2243a2e63SVlad Yasevich #include <linux/netdevice.h> 3243a2e63SVlad Yasevich #include <linux/rtnetlink.h> 4243a2e63SVlad Yasevich #include <linux/slab.h> 5243a2e63SVlad Yasevich 6243a2e63SVlad Yasevich #include "br_private.h" 7243a2e63SVlad Yasevich 8552406c4SVlad Yasevich static void __vlan_add_pvid(struct net_port_vlans *v, u16 vid) 9552406c4SVlad Yasevich { 10552406c4SVlad Yasevich if (v->pvid == vid) 11552406c4SVlad Yasevich return; 12552406c4SVlad Yasevich 13552406c4SVlad Yasevich smp_wmb(); 14552406c4SVlad Yasevich v->pvid = vid; 15552406c4SVlad Yasevich } 16552406c4SVlad Yasevich 17552406c4SVlad Yasevich static void __vlan_delete_pvid(struct net_port_vlans *v, u16 vid) 18552406c4SVlad Yasevich { 19552406c4SVlad Yasevich if (v->pvid != vid) 20552406c4SVlad Yasevich return; 21552406c4SVlad Yasevich 22552406c4SVlad Yasevich smp_wmb(); 23552406c4SVlad Yasevich v->pvid = 0; 24552406c4SVlad Yasevich } 25552406c4SVlad Yasevich 2635e03f3aSVlad Yasevich static void __vlan_add_flags(struct net_port_vlans *v, u16 vid, u16 flags) 2735e03f3aSVlad Yasevich { 2835e03f3aSVlad Yasevich if (flags & BRIDGE_VLAN_INFO_PVID) 2935e03f3aSVlad Yasevich __vlan_add_pvid(v, vid); 3035e03f3aSVlad Yasevich 3135e03f3aSVlad Yasevich if (flags & BRIDGE_VLAN_INFO_UNTAGGED) 3235e03f3aSVlad Yasevich set_bit(vid, v->untagged_bitmap); 3335e03f3aSVlad Yasevich } 3435e03f3aSVlad Yasevich 35552406c4SVlad Yasevich static int __vlan_add(struct net_port_vlans *v, u16 vid, u16 flags) 36243a2e63SVlad Yasevich { 37bc9a25d2SVlad Yasevich struct net_bridge_port *p = NULL; 38bc9a25d2SVlad Yasevich struct net_bridge *br; 39bc9a25d2SVlad Yasevich struct net_device *dev; 40243a2e63SVlad Yasevich int err; 41243a2e63SVlad Yasevich 42552406c4SVlad Yasevich if (test_bit(vid, v->vlan_bitmap)) { 4335e03f3aSVlad Yasevich __vlan_add_flags(v, vid, flags); 44552406c4SVlad Yasevich return 0; 45552406c4SVlad Yasevich } 46243a2e63SVlad Yasevich 47bc9a25d2SVlad Yasevich if (vid) { 48bc9a25d2SVlad Yasevich if (v->port_idx) { 49bc9a25d2SVlad Yasevich p = v->parent.port; 50bc9a25d2SVlad Yasevich br = p->br; 51bc9a25d2SVlad Yasevich dev = p->dev; 52bc9a25d2SVlad Yasevich } else { 53bc9a25d2SVlad Yasevich br = v->parent.br; 54bc9a25d2SVlad Yasevich dev = br->dev; 55bc9a25d2SVlad Yasevich } 56243a2e63SVlad Yasevich 57f646968fSPatrick McHardy if (p && (dev->features & NETIF_F_HW_VLAN_CTAG_FILTER)) { 58243a2e63SVlad Yasevich /* Add VLAN to the device filter if it is supported. 59bc9a25d2SVlad Yasevich * Stricly speaking, this is not necessary now, since 60bc9a25d2SVlad Yasevich * devices are made promiscuous by the bridge, but if 61bc9a25d2SVlad Yasevich * that ever changes this code will allow tagged 62bc9a25d2SVlad Yasevich * traffic to enter the bridge. 63243a2e63SVlad Yasevich */ 64243a2e63SVlad Yasevich err = dev->netdev_ops->ndo_vlan_rx_add_vid(dev, vid); 65243a2e63SVlad Yasevich if (err) 66243a2e63SVlad Yasevich return err; 67243a2e63SVlad Yasevich } 68bc9a25d2SVlad Yasevich 69bc9a25d2SVlad Yasevich err = br_fdb_insert(br, p, dev->dev_addr, vid); 70bc9a25d2SVlad Yasevich if (err) { 71bc9a25d2SVlad Yasevich br_err(br, "failed insert local address into bridge " 72bc9a25d2SVlad Yasevich "forwarding table\n"); 73bc9a25d2SVlad Yasevich goto out_filt; 74bc9a25d2SVlad Yasevich } 75bc9a25d2SVlad Yasevich 76243a2e63SVlad Yasevich } 77243a2e63SVlad Yasevich 78243a2e63SVlad Yasevich set_bit(vid, v->vlan_bitmap); 796cbdceebSVlad Yasevich v->num_vlans++; 8035e03f3aSVlad Yasevich __vlan_add_flags(v, vid, flags); 81552406c4SVlad Yasevich 82243a2e63SVlad Yasevich return 0; 83bc9a25d2SVlad Yasevich 84bc9a25d2SVlad Yasevich out_filt: 85f646968fSPatrick McHardy if (p && (dev->features & NETIF_F_HW_VLAN_CTAG_FILTER)) 86bc9a25d2SVlad Yasevich dev->netdev_ops->ndo_vlan_rx_kill_vid(dev, vid); 87bc9a25d2SVlad Yasevich return err; 88243a2e63SVlad Yasevich } 89243a2e63SVlad Yasevich 90243a2e63SVlad Yasevich static int __vlan_del(struct net_port_vlans *v, u16 vid) 91243a2e63SVlad Yasevich { 92243a2e63SVlad Yasevich if (!test_bit(vid, v->vlan_bitmap)) 93243a2e63SVlad Yasevich return -EINVAL; 94243a2e63SVlad Yasevich 95552406c4SVlad Yasevich __vlan_delete_pvid(v, vid); 9635e03f3aSVlad Yasevich clear_bit(vid, v->untagged_bitmap); 97552406c4SVlad Yasevich 98243a2e63SVlad Yasevich if (v->port_idx && vid) { 99243a2e63SVlad Yasevich struct net_device *dev = v->parent.port->dev; 100243a2e63SVlad Yasevich 101f646968fSPatrick McHardy if (dev->features & NETIF_F_HW_VLAN_CTAG_FILTER) 102243a2e63SVlad Yasevich dev->netdev_ops->ndo_vlan_rx_kill_vid(dev, vid); 103243a2e63SVlad Yasevich } 104243a2e63SVlad Yasevich 105243a2e63SVlad Yasevich clear_bit(vid, v->vlan_bitmap); 1066cbdceebSVlad Yasevich v->num_vlans--; 107243a2e63SVlad Yasevich if (bitmap_empty(v->vlan_bitmap, BR_VLAN_BITMAP_LEN)) { 108243a2e63SVlad Yasevich if (v->port_idx) 109243a2e63SVlad Yasevich rcu_assign_pointer(v->parent.port->vlan_info, NULL); 110243a2e63SVlad Yasevich else 111243a2e63SVlad Yasevich rcu_assign_pointer(v->parent.br->vlan_info, NULL); 112243a2e63SVlad Yasevich kfree_rcu(v, rcu); 113243a2e63SVlad Yasevich } 114243a2e63SVlad Yasevich return 0; 115243a2e63SVlad Yasevich } 116243a2e63SVlad Yasevich 117243a2e63SVlad Yasevich static void __vlan_flush(struct net_port_vlans *v) 118243a2e63SVlad Yasevich { 119552406c4SVlad Yasevich smp_wmb(); 120552406c4SVlad Yasevich v->pvid = 0; 121243a2e63SVlad Yasevich bitmap_zero(v->vlan_bitmap, BR_VLAN_BITMAP_LEN); 122243a2e63SVlad Yasevich if (v->port_idx) 123243a2e63SVlad Yasevich rcu_assign_pointer(v->parent.port->vlan_info, NULL); 124243a2e63SVlad Yasevich else 125243a2e63SVlad Yasevich rcu_assign_pointer(v->parent.br->vlan_info, NULL); 126243a2e63SVlad Yasevich kfree_rcu(v, rcu); 127243a2e63SVlad Yasevich } 128243a2e63SVlad Yasevich 12978851988SVlad Yasevich /* Strip the tag from the packet. Will return skb with tci set 0. */ 13078851988SVlad Yasevich static struct sk_buff *br_vlan_untag(struct sk_buff *skb) 13178851988SVlad Yasevich { 13278851988SVlad Yasevich if (skb->protocol != htons(ETH_P_8021Q)) { 13378851988SVlad Yasevich skb->vlan_tci = 0; 13478851988SVlad Yasevich return skb; 13578851988SVlad Yasevich } 13678851988SVlad Yasevich 13778851988SVlad Yasevich skb->vlan_tci = 0; 13878851988SVlad Yasevich skb = vlan_untag(skb); 13978851988SVlad Yasevich if (skb) 14078851988SVlad Yasevich skb->vlan_tci = 0; 14178851988SVlad Yasevich 14278851988SVlad Yasevich return skb; 14378851988SVlad Yasevich } 14478851988SVlad Yasevich 14578851988SVlad Yasevich struct sk_buff *br_handle_vlan(struct net_bridge *br, 14678851988SVlad Yasevich const struct net_port_vlans *pv, 147a37b85c9SVlad Yasevich struct sk_buff *skb) 148a37b85c9SVlad Yasevich { 149a37b85c9SVlad Yasevich u16 vid; 150a37b85c9SVlad Yasevich 15178851988SVlad Yasevich if (!br->vlan_enabled) 15278851988SVlad Yasevich goto out; 15378851988SVlad Yasevich 15478851988SVlad Yasevich /* At this point, we know that the frame was filtered and contains 15535e03f3aSVlad Yasevich * a valid vlan id. If the vlan id is set in the untagged bitmap, 15678851988SVlad Yasevich * send untagged; otherwise, send taged. 15778851988SVlad Yasevich */ 15878851988SVlad Yasevich br_vlan_get_tag(skb, &vid); 15935e03f3aSVlad Yasevich if (test_bit(vid, pv->untagged_bitmap)) 16078851988SVlad Yasevich skb = br_vlan_untag(skb); 16178851988SVlad Yasevich else { 16278851988SVlad Yasevich /* Egress policy says "send tagged". If output device 16378851988SVlad Yasevich * is the bridge, we need to add the VLAN header 16478851988SVlad Yasevich * ourselves since we'll be going through the RX path. 16578851988SVlad Yasevich * Sending to ports puts the frame on the TX path and 16678851988SVlad Yasevich * we let dev_hard_start_xmit() add the header. 16778851988SVlad Yasevich */ 16878851988SVlad Yasevich if (skb->protocol != htons(ETH_P_8021Q) && 16978851988SVlad Yasevich pv->port_idx == 0) { 17078851988SVlad Yasevich /* vlan_put_tag expects skb->data to point to 17178851988SVlad Yasevich * mac header. 17278851988SVlad Yasevich */ 17378851988SVlad Yasevich skb_push(skb, ETH_HLEN); 17478851988SVlad Yasevich skb = __vlan_put_tag(skb, skb->vlan_tci); 17578851988SVlad Yasevich if (!skb) 17678851988SVlad Yasevich goto out; 17778851988SVlad Yasevich /* put skb->data back to where it was */ 17878851988SVlad Yasevich skb_pull(skb, ETH_HLEN); 17978851988SVlad Yasevich skb->vlan_tci = 0; 18078851988SVlad Yasevich } 18178851988SVlad Yasevich } 18278851988SVlad Yasevich 18378851988SVlad Yasevich out: 18478851988SVlad Yasevich return skb; 18578851988SVlad Yasevich } 18678851988SVlad Yasevich 18778851988SVlad Yasevich /* Called under RCU */ 18878851988SVlad Yasevich bool br_allowed_ingress(struct net_bridge *br, struct net_port_vlans *v, 18978851988SVlad Yasevich struct sk_buff *skb, u16 *vid) 19078851988SVlad Yasevich { 191a37b85c9SVlad Yasevich /* If VLAN filtering is disabled on the bridge, all packets are 192a37b85c9SVlad Yasevich * permitted. 193a37b85c9SVlad Yasevich */ 194a37b85c9SVlad Yasevich if (!br->vlan_enabled) 195a37b85c9SVlad Yasevich return true; 196a37b85c9SVlad Yasevich 197a37b85c9SVlad Yasevich /* If there are no vlan in the permitted list, all packets are 198a37b85c9SVlad Yasevich * rejected. 199a37b85c9SVlad Yasevich */ 200a37b85c9SVlad Yasevich if (!v) 201a37b85c9SVlad Yasevich return false; 202a37b85c9SVlad Yasevich 20378851988SVlad Yasevich if (br_vlan_get_tag(skb, vid)) { 20478851988SVlad Yasevich u16 pvid = br_get_pvid(v); 20578851988SVlad Yasevich 20678851988SVlad Yasevich /* Frame did not have a tag. See if pvid is set 20778851988SVlad Yasevich * on this port. That tells us which vlan untagged 20878851988SVlad Yasevich * traffic belongs to. 20978851988SVlad Yasevich */ 21078851988SVlad Yasevich if (pvid == VLAN_N_VID) 21178851988SVlad Yasevich return false; 21278851988SVlad Yasevich 21378851988SVlad Yasevich /* PVID is set on this port. Any untagged ingress 21478851988SVlad Yasevich * frame is considered to belong to this vlan. 21578851988SVlad Yasevich */ 21678851988SVlad Yasevich __vlan_hwaccel_put_tag(skb, pvid); 21778851988SVlad Yasevich return true; 21878851988SVlad Yasevich } 21978851988SVlad Yasevich 22078851988SVlad Yasevich /* Frame had a valid vlan tag. See if vlan is allowed */ 22178851988SVlad Yasevich if (test_bit(*vid, v->vlan_bitmap)) 222a37b85c9SVlad Yasevich return true; 223a37b85c9SVlad Yasevich 224a37b85c9SVlad Yasevich return false; 225a37b85c9SVlad Yasevich } 226a37b85c9SVlad Yasevich 22785f46c6bSVlad Yasevich /* Called under RCU. */ 22885f46c6bSVlad Yasevich bool br_allowed_egress(struct net_bridge *br, 22985f46c6bSVlad Yasevich const struct net_port_vlans *v, 23085f46c6bSVlad Yasevich const struct sk_buff *skb) 23185f46c6bSVlad Yasevich { 23285f46c6bSVlad Yasevich u16 vid; 23385f46c6bSVlad Yasevich 23485f46c6bSVlad Yasevich if (!br->vlan_enabled) 23585f46c6bSVlad Yasevich return true; 23685f46c6bSVlad Yasevich 23785f46c6bSVlad Yasevich if (!v) 23885f46c6bSVlad Yasevich return false; 23985f46c6bSVlad Yasevich 24085f46c6bSVlad Yasevich br_vlan_get_tag(skb, &vid); 24185f46c6bSVlad Yasevich if (test_bit(vid, v->vlan_bitmap)) 24285f46c6bSVlad Yasevich return true; 24385f46c6bSVlad Yasevich 24485f46c6bSVlad Yasevich return false; 24585f46c6bSVlad Yasevich } 24685f46c6bSVlad Yasevich 247243a2e63SVlad Yasevich /* Must be protected by RTNL */ 248552406c4SVlad Yasevich int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags) 249243a2e63SVlad Yasevich { 250243a2e63SVlad Yasevich struct net_port_vlans *pv = NULL; 251243a2e63SVlad Yasevich int err; 252243a2e63SVlad Yasevich 253243a2e63SVlad Yasevich ASSERT_RTNL(); 254243a2e63SVlad Yasevich 255243a2e63SVlad Yasevich pv = rtnl_dereference(br->vlan_info); 256243a2e63SVlad Yasevich if (pv) 257552406c4SVlad Yasevich return __vlan_add(pv, vid, flags); 258243a2e63SVlad Yasevich 259243a2e63SVlad Yasevich /* Create port vlan infomration 260243a2e63SVlad Yasevich */ 261243a2e63SVlad Yasevich pv = kzalloc(sizeof(*pv), GFP_KERNEL); 262243a2e63SVlad Yasevich if (!pv) 263243a2e63SVlad Yasevich return -ENOMEM; 264243a2e63SVlad Yasevich 265243a2e63SVlad Yasevich pv->parent.br = br; 266552406c4SVlad Yasevich err = __vlan_add(pv, vid, flags); 267243a2e63SVlad Yasevich if (err) 268243a2e63SVlad Yasevich goto out; 269243a2e63SVlad Yasevich 270243a2e63SVlad Yasevich rcu_assign_pointer(br->vlan_info, pv); 271243a2e63SVlad Yasevich return 0; 272243a2e63SVlad Yasevich out: 273243a2e63SVlad Yasevich kfree(pv); 274243a2e63SVlad Yasevich return err; 275243a2e63SVlad Yasevich } 276243a2e63SVlad Yasevich 277243a2e63SVlad Yasevich /* Must be protected by RTNL */ 278243a2e63SVlad Yasevich int br_vlan_delete(struct net_bridge *br, u16 vid) 279243a2e63SVlad Yasevich { 280243a2e63SVlad Yasevich struct net_port_vlans *pv; 281243a2e63SVlad Yasevich 282243a2e63SVlad Yasevich ASSERT_RTNL(); 283243a2e63SVlad Yasevich 284243a2e63SVlad Yasevich pv = rtnl_dereference(br->vlan_info); 285243a2e63SVlad Yasevich if (!pv) 286243a2e63SVlad Yasevich return -EINVAL; 287243a2e63SVlad Yasevich 288bc9a25d2SVlad Yasevich if (vid) { 289bc9a25d2SVlad Yasevich /* If the VID !=0 remove fdb for this vid. VID 0 is special 290bc9a25d2SVlad Yasevich * in that it's the default and is always there in the fdb. 291bc9a25d2SVlad Yasevich */ 292bc9a25d2SVlad Yasevich spin_lock_bh(&br->hash_lock); 293bc9a25d2SVlad Yasevich fdb_delete_by_addr(br, br->dev->dev_addr, vid); 294bc9a25d2SVlad Yasevich spin_unlock_bh(&br->hash_lock); 295bc9a25d2SVlad Yasevich } 296bc9a25d2SVlad Yasevich 297243a2e63SVlad Yasevich __vlan_del(pv, vid); 298243a2e63SVlad Yasevich return 0; 299243a2e63SVlad Yasevich } 300243a2e63SVlad Yasevich 301243a2e63SVlad Yasevich void br_vlan_flush(struct net_bridge *br) 302243a2e63SVlad Yasevich { 303243a2e63SVlad Yasevich struct net_port_vlans *pv; 304243a2e63SVlad Yasevich 305243a2e63SVlad Yasevich ASSERT_RTNL(); 306243a2e63SVlad Yasevich pv = rtnl_dereference(br->vlan_info); 307243a2e63SVlad Yasevich if (!pv) 308243a2e63SVlad Yasevich return; 309243a2e63SVlad Yasevich 310243a2e63SVlad Yasevich __vlan_flush(pv); 311243a2e63SVlad Yasevich } 312243a2e63SVlad Yasevich 313243a2e63SVlad Yasevich int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val) 314243a2e63SVlad Yasevich { 315243a2e63SVlad Yasevich if (!rtnl_trylock()) 316243a2e63SVlad Yasevich return restart_syscall(); 317243a2e63SVlad Yasevich 318243a2e63SVlad Yasevich if (br->vlan_enabled == val) 319243a2e63SVlad Yasevich goto unlock; 320243a2e63SVlad Yasevich 321243a2e63SVlad Yasevich br->vlan_enabled = val; 322243a2e63SVlad Yasevich 323243a2e63SVlad Yasevich unlock: 324243a2e63SVlad Yasevich rtnl_unlock(); 325243a2e63SVlad Yasevich return 0; 326243a2e63SVlad Yasevich } 327243a2e63SVlad Yasevich 328243a2e63SVlad Yasevich /* Must be protected by RTNL */ 329552406c4SVlad Yasevich int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags) 330243a2e63SVlad Yasevich { 331243a2e63SVlad Yasevich struct net_port_vlans *pv = NULL; 332243a2e63SVlad Yasevich int err; 333243a2e63SVlad Yasevich 334243a2e63SVlad Yasevich ASSERT_RTNL(); 335243a2e63SVlad Yasevich 336243a2e63SVlad Yasevich pv = rtnl_dereference(port->vlan_info); 337243a2e63SVlad Yasevich if (pv) 338552406c4SVlad Yasevich return __vlan_add(pv, vid, flags); 339243a2e63SVlad Yasevich 340243a2e63SVlad Yasevich /* Create port vlan infomration 341243a2e63SVlad Yasevich */ 342243a2e63SVlad Yasevich pv = kzalloc(sizeof(*pv), GFP_KERNEL); 343243a2e63SVlad Yasevich if (!pv) { 344243a2e63SVlad Yasevich err = -ENOMEM; 345243a2e63SVlad Yasevich goto clean_up; 346243a2e63SVlad Yasevich } 347243a2e63SVlad Yasevich 348243a2e63SVlad Yasevich pv->port_idx = port->port_no; 349243a2e63SVlad Yasevich pv->parent.port = port; 350552406c4SVlad Yasevich err = __vlan_add(pv, vid, flags); 351243a2e63SVlad Yasevich if (err) 352243a2e63SVlad Yasevich goto clean_up; 353243a2e63SVlad Yasevich 354243a2e63SVlad Yasevich rcu_assign_pointer(port->vlan_info, pv); 355243a2e63SVlad Yasevich return 0; 356243a2e63SVlad Yasevich 357243a2e63SVlad Yasevich clean_up: 358243a2e63SVlad Yasevich kfree(pv); 359243a2e63SVlad Yasevich return err; 360243a2e63SVlad Yasevich } 361243a2e63SVlad Yasevich 362243a2e63SVlad Yasevich /* Must be protected by RTNL */ 363243a2e63SVlad Yasevich int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) 364243a2e63SVlad Yasevich { 365243a2e63SVlad Yasevich struct net_port_vlans *pv; 366243a2e63SVlad Yasevich 367243a2e63SVlad Yasevich ASSERT_RTNL(); 368243a2e63SVlad Yasevich 369243a2e63SVlad Yasevich pv = rtnl_dereference(port->vlan_info); 370243a2e63SVlad Yasevich if (!pv) 371243a2e63SVlad Yasevich return -EINVAL; 372243a2e63SVlad Yasevich 373bc9a25d2SVlad Yasevich if (vid) { 374bc9a25d2SVlad Yasevich /* If the VID !=0 remove fdb for this vid. VID 0 is special 375bc9a25d2SVlad Yasevich * in that it's the default and is always there in the fdb. 376bc9a25d2SVlad Yasevich */ 377bc9a25d2SVlad Yasevich spin_lock_bh(&port->br->hash_lock); 378bc9a25d2SVlad Yasevich fdb_delete_by_addr(port->br, port->dev->dev_addr, vid); 379bc9a25d2SVlad Yasevich spin_unlock_bh(&port->br->hash_lock); 380bc9a25d2SVlad Yasevich } 381bc9a25d2SVlad Yasevich 382243a2e63SVlad Yasevich return __vlan_del(pv, vid); 383243a2e63SVlad Yasevich } 384243a2e63SVlad Yasevich 385243a2e63SVlad Yasevich void nbp_vlan_flush(struct net_bridge_port *port) 386243a2e63SVlad Yasevich { 387243a2e63SVlad Yasevich struct net_port_vlans *pv; 388243a2e63SVlad Yasevich 389243a2e63SVlad Yasevich ASSERT_RTNL(); 390243a2e63SVlad Yasevich 391243a2e63SVlad Yasevich pv = rtnl_dereference(port->vlan_info); 392243a2e63SVlad Yasevich if (!pv) 393243a2e63SVlad Yasevich return; 394243a2e63SVlad Yasevich 395243a2e63SVlad Yasevich __vlan_flush(pv); 396243a2e63SVlad Yasevich } 397bc9a25d2SVlad Yasevich 398bc9a25d2SVlad Yasevich bool nbp_vlan_find(struct net_bridge_port *port, u16 vid) 399bc9a25d2SVlad Yasevich { 400bc9a25d2SVlad Yasevich struct net_port_vlans *pv; 401bc9a25d2SVlad Yasevich bool found = false; 402bc9a25d2SVlad Yasevich 403bc9a25d2SVlad Yasevich rcu_read_lock(); 404bc9a25d2SVlad Yasevich pv = rcu_dereference(port->vlan_info); 405bc9a25d2SVlad Yasevich 406bc9a25d2SVlad Yasevich if (!pv) 407bc9a25d2SVlad Yasevich goto out; 408bc9a25d2SVlad Yasevich 409bc9a25d2SVlad Yasevich if (test_bit(vid, pv->vlan_bitmap)) 410bc9a25d2SVlad Yasevich found = true; 411bc9a25d2SVlad Yasevich 412bc9a25d2SVlad Yasevich out: 413bc9a25d2SVlad Yasevich rcu_read_unlock(); 414bc9a25d2SVlad Yasevich return found; 415bc9a25d2SVlad Yasevich } 416