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 { 3780d5c368SPatrick McHardy const struct net_device_ops *ops; 38bc9a25d2SVlad Yasevich struct net_bridge_port *p = NULL; 39bc9a25d2SVlad Yasevich struct net_bridge *br; 40bc9a25d2SVlad Yasevich struct net_device *dev; 41243a2e63SVlad Yasevich int err; 42243a2e63SVlad Yasevich 43552406c4SVlad Yasevich if (test_bit(vid, v->vlan_bitmap)) { 4435e03f3aSVlad Yasevich __vlan_add_flags(v, vid, flags); 45552406c4SVlad Yasevich return 0; 46552406c4SVlad Yasevich } 47243a2e63SVlad Yasevich 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 } 5680d5c368SPatrick McHardy ops = dev->netdev_ops; 57243a2e63SVlad Yasevich 58f646968fSPatrick McHardy if (p && (dev->features & NETIF_F_HW_VLAN_CTAG_FILTER)) { 59243a2e63SVlad Yasevich /* Add VLAN to the device filter if it is supported. 60bc9a25d2SVlad Yasevich * Stricly speaking, this is not necessary now, since 61bc9a25d2SVlad Yasevich * devices are made promiscuous by the bridge, but if 62bc9a25d2SVlad Yasevich * that ever changes this code will allow tagged 63bc9a25d2SVlad Yasevich * traffic to enter the bridge. 64243a2e63SVlad Yasevich */ 6580d5c368SPatrick McHardy err = ops->ndo_vlan_rx_add_vid(dev, htons(ETH_P_8021Q), 6680d5c368SPatrick McHardy vid); 67243a2e63SVlad Yasevich if (err) 68243a2e63SVlad Yasevich return err; 69243a2e63SVlad Yasevich } 70bc9a25d2SVlad Yasevich 71bc9a25d2SVlad Yasevich err = br_fdb_insert(br, p, dev->dev_addr, vid); 72bc9a25d2SVlad Yasevich if (err) { 73bc9a25d2SVlad Yasevich br_err(br, "failed insert local address into bridge " 74bc9a25d2SVlad Yasevich "forwarding table\n"); 75bc9a25d2SVlad Yasevich goto out_filt; 76bc9a25d2SVlad Yasevich } 77bc9a25d2SVlad 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)) 8680d5c368SPatrick McHardy ops->ndo_vlan_rx_kill_vid(dev, htons(ETH_P_8021Q), 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 988adff41cSToshiaki Makita if (v->port_idx) { 99243a2e63SVlad Yasevich struct net_device *dev = v->parent.port->dev; 10080d5c368SPatrick McHardy const struct net_device_ops *ops = dev->netdev_ops; 101243a2e63SVlad Yasevich 102f646968fSPatrick McHardy if (dev->features & NETIF_F_HW_VLAN_CTAG_FILTER) 10380d5c368SPatrick McHardy ops->ndo_vlan_rx_kill_vid(dev, htons(ETH_P_8021Q), vid); 104243a2e63SVlad Yasevich } 105243a2e63SVlad Yasevich 106243a2e63SVlad Yasevich clear_bit(vid, v->vlan_bitmap); 1076cbdceebSVlad Yasevich v->num_vlans--; 108ef40b7efSToshiaki Makita if (bitmap_empty(v->vlan_bitmap, VLAN_N_VID)) { 109243a2e63SVlad Yasevich if (v->port_idx) 110243a2e63SVlad Yasevich rcu_assign_pointer(v->parent.port->vlan_info, NULL); 111243a2e63SVlad Yasevich else 112243a2e63SVlad Yasevich rcu_assign_pointer(v->parent.br->vlan_info, NULL); 113243a2e63SVlad Yasevich kfree_rcu(v, rcu); 114243a2e63SVlad Yasevich } 115243a2e63SVlad Yasevich return 0; 116243a2e63SVlad Yasevich } 117243a2e63SVlad Yasevich 118243a2e63SVlad Yasevich static void __vlan_flush(struct net_port_vlans *v) 119243a2e63SVlad Yasevich { 120552406c4SVlad Yasevich smp_wmb(); 121552406c4SVlad Yasevich v->pvid = 0; 122ef40b7efSToshiaki Makita bitmap_zero(v->vlan_bitmap, VLAN_N_VID); 123243a2e63SVlad Yasevich if (v->port_idx) 124243a2e63SVlad Yasevich rcu_assign_pointer(v->parent.port->vlan_info, NULL); 125243a2e63SVlad Yasevich else 126243a2e63SVlad Yasevich rcu_assign_pointer(v->parent.br->vlan_info, NULL); 127243a2e63SVlad Yasevich kfree_rcu(v, rcu); 128243a2e63SVlad Yasevich } 129243a2e63SVlad Yasevich 13078851988SVlad Yasevich /* Strip the tag from the packet. Will return skb with tci set 0. */ 13178851988SVlad Yasevich static struct sk_buff *br_vlan_untag(struct sk_buff *skb) 13278851988SVlad Yasevich { 13378851988SVlad Yasevich if (skb->protocol != htons(ETH_P_8021Q)) { 13478851988SVlad Yasevich skb->vlan_tci = 0; 13578851988SVlad Yasevich return skb; 13678851988SVlad Yasevich } 13778851988SVlad Yasevich 13878851988SVlad Yasevich skb->vlan_tci = 0; 13978851988SVlad Yasevich skb = vlan_untag(skb); 14078851988SVlad Yasevich if (skb) 14178851988SVlad Yasevich skb->vlan_tci = 0; 14278851988SVlad Yasevich 14378851988SVlad Yasevich return skb; 14478851988SVlad Yasevich } 14578851988SVlad Yasevich 14678851988SVlad Yasevich struct sk_buff *br_handle_vlan(struct net_bridge *br, 14778851988SVlad Yasevich const struct net_port_vlans *pv, 148a37b85c9SVlad Yasevich struct sk_buff *skb) 149a37b85c9SVlad Yasevich { 150a37b85c9SVlad Yasevich u16 vid; 151a37b85c9SVlad Yasevich 15278851988SVlad Yasevich if (!br->vlan_enabled) 15378851988SVlad Yasevich goto out; 15478851988SVlad Yasevich 15578851988SVlad Yasevich /* At this point, we know that the frame was filtered and contains 15635e03f3aSVlad Yasevich * a valid vlan id. If the vlan id is set in the untagged bitmap, 15778851988SVlad Yasevich * send untagged; otherwise, send taged. 15878851988SVlad Yasevich */ 15978851988SVlad Yasevich br_vlan_get_tag(skb, &vid); 16035e03f3aSVlad Yasevich if (test_bit(vid, pv->untagged_bitmap)) 16178851988SVlad Yasevich skb = br_vlan_untag(skb); 16278851988SVlad Yasevich else { 16378851988SVlad Yasevich /* Egress policy says "send tagged". If output device 16478851988SVlad Yasevich * is the bridge, we need to add the VLAN header 16578851988SVlad Yasevich * ourselves since we'll be going through the RX path. 16678851988SVlad Yasevich * Sending to ports puts the frame on the TX path and 16778851988SVlad Yasevich * we let dev_hard_start_xmit() add the header. 16878851988SVlad Yasevich */ 16978851988SVlad Yasevich if (skb->protocol != htons(ETH_P_8021Q) && 17078851988SVlad Yasevich pv->port_idx == 0) { 17178851988SVlad Yasevich /* vlan_put_tag expects skb->data to point to 17278851988SVlad Yasevich * mac header. 17378851988SVlad Yasevich */ 17478851988SVlad Yasevich skb_push(skb, ETH_HLEN); 17586a9bad3SPatrick McHardy skb = __vlan_put_tag(skb, skb->vlan_proto, skb->vlan_tci); 17678851988SVlad Yasevich if (!skb) 17778851988SVlad Yasevich goto out; 17878851988SVlad Yasevich /* put skb->data back to where it was */ 17978851988SVlad Yasevich skb_pull(skb, ETH_HLEN); 18078851988SVlad Yasevich skb->vlan_tci = 0; 18178851988SVlad Yasevich } 18278851988SVlad Yasevich } 18378851988SVlad Yasevich 18478851988SVlad Yasevich out: 18578851988SVlad Yasevich return skb; 18678851988SVlad Yasevich } 18778851988SVlad Yasevich 18878851988SVlad Yasevich /* Called under RCU */ 18978851988SVlad Yasevich bool br_allowed_ingress(struct net_bridge *br, struct net_port_vlans *v, 19078851988SVlad Yasevich struct sk_buff *skb, u16 *vid) 19178851988SVlad Yasevich { 192a37b85c9SVlad Yasevich /* If VLAN filtering is disabled on the bridge, all packets are 193a37b85c9SVlad Yasevich * permitted. 194a37b85c9SVlad Yasevich */ 195a37b85c9SVlad Yasevich if (!br->vlan_enabled) 196a37b85c9SVlad Yasevich return true; 197a37b85c9SVlad Yasevich 198a37b85c9SVlad Yasevich /* If there are no vlan in the permitted list, all packets are 199a37b85c9SVlad Yasevich * rejected. 200a37b85c9SVlad Yasevich */ 201a37b85c9SVlad Yasevich if (!v) 202a37b85c9SVlad Yasevich return false; 203a37b85c9SVlad Yasevich 20478851988SVlad Yasevich if (br_vlan_get_tag(skb, vid)) { 20578851988SVlad Yasevich u16 pvid = br_get_pvid(v); 20678851988SVlad Yasevich 20778851988SVlad Yasevich /* Frame did not have a tag. See if pvid is set 20878851988SVlad Yasevich * on this port. That tells us which vlan untagged 20978851988SVlad Yasevich * traffic belongs to. 21078851988SVlad Yasevich */ 21178851988SVlad Yasevich if (pvid == VLAN_N_VID) 21278851988SVlad Yasevich return false; 21378851988SVlad Yasevich 21478851988SVlad Yasevich /* PVID is set on this port. Any untagged ingress 21578851988SVlad Yasevich * frame is considered to belong to this vlan. 21678851988SVlad Yasevich */ 21786a9bad3SPatrick McHardy __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), pvid); 21878851988SVlad Yasevich return true; 21978851988SVlad Yasevich } 22078851988SVlad Yasevich 22178851988SVlad Yasevich /* Frame had a valid vlan tag. See if vlan is allowed */ 22278851988SVlad Yasevich if (test_bit(*vid, v->vlan_bitmap)) 223a37b85c9SVlad Yasevich return true; 224a37b85c9SVlad Yasevich 225a37b85c9SVlad Yasevich return false; 226a37b85c9SVlad Yasevich } 227a37b85c9SVlad Yasevich 22885f46c6bSVlad Yasevich /* Called under RCU. */ 22985f46c6bSVlad Yasevich bool br_allowed_egress(struct net_bridge *br, 23085f46c6bSVlad Yasevich const struct net_port_vlans *v, 23185f46c6bSVlad Yasevich const struct sk_buff *skb) 23285f46c6bSVlad Yasevich { 23385f46c6bSVlad Yasevich u16 vid; 23485f46c6bSVlad Yasevich 23585f46c6bSVlad Yasevich if (!br->vlan_enabled) 23685f46c6bSVlad Yasevich return true; 23785f46c6bSVlad Yasevich 23885f46c6bSVlad Yasevich if (!v) 23985f46c6bSVlad Yasevich return false; 24085f46c6bSVlad Yasevich 24185f46c6bSVlad Yasevich br_vlan_get_tag(skb, &vid); 24285f46c6bSVlad Yasevich if (test_bit(vid, v->vlan_bitmap)) 24385f46c6bSVlad Yasevich return true; 24485f46c6bSVlad Yasevich 24585f46c6bSVlad Yasevich return false; 24685f46c6bSVlad Yasevich } 24785f46c6bSVlad Yasevich 2488adff41cSToshiaki Makita /* Must be protected by RTNL. 2498adff41cSToshiaki Makita * Must be called with vid in range from 1 to 4094 inclusive. 2508adff41cSToshiaki Makita */ 251552406c4SVlad Yasevich int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags) 252243a2e63SVlad Yasevich { 253243a2e63SVlad Yasevich struct net_port_vlans *pv = NULL; 254243a2e63SVlad Yasevich int err; 255243a2e63SVlad Yasevich 256243a2e63SVlad Yasevich ASSERT_RTNL(); 257243a2e63SVlad Yasevich 258243a2e63SVlad Yasevich pv = rtnl_dereference(br->vlan_info); 259243a2e63SVlad Yasevich if (pv) 260552406c4SVlad Yasevich return __vlan_add(pv, vid, flags); 261243a2e63SVlad Yasevich 262243a2e63SVlad Yasevich /* Create port vlan infomration 263243a2e63SVlad Yasevich */ 264243a2e63SVlad Yasevich pv = kzalloc(sizeof(*pv), GFP_KERNEL); 265243a2e63SVlad Yasevich if (!pv) 266243a2e63SVlad Yasevich return -ENOMEM; 267243a2e63SVlad Yasevich 268243a2e63SVlad Yasevich pv->parent.br = br; 269552406c4SVlad Yasevich err = __vlan_add(pv, vid, flags); 270243a2e63SVlad Yasevich if (err) 271243a2e63SVlad Yasevich goto out; 272243a2e63SVlad Yasevich 273243a2e63SVlad Yasevich rcu_assign_pointer(br->vlan_info, pv); 274243a2e63SVlad Yasevich return 0; 275243a2e63SVlad Yasevich out: 276243a2e63SVlad Yasevich kfree(pv); 277243a2e63SVlad Yasevich return err; 278243a2e63SVlad Yasevich } 279243a2e63SVlad Yasevich 2808adff41cSToshiaki Makita /* Must be protected by RTNL. 2818adff41cSToshiaki Makita * Must be called with vid in range from 1 to 4094 inclusive. 2828adff41cSToshiaki Makita */ 283243a2e63SVlad Yasevich int br_vlan_delete(struct net_bridge *br, u16 vid) 284243a2e63SVlad Yasevich { 285243a2e63SVlad Yasevich struct net_port_vlans *pv; 286243a2e63SVlad Yasevich 287243a2e63SVlad Yasevich ASSERT_RTNL(); 288243a2e63SVlad Yasevich 289243a2e63SVlad Yasevich pv = rtnl_dereference(br->vlan_info); 290243a2e63SVlad Yasevich if (!pv) 291243a2e63SVlad Yasevich return -EINVAL; 292243a2e63SVlad Yasevich 293bc9a25d2SVlad Yasevich spin_lock_bh(&br->hash_lock); 294bc9a25d2SVlad Yasevich fdb_delete_by_addr(br, br->dev->dev_addr, vid); 295bc9a25d2SVlad Yasevich spin_unlock_bh(&br->hash_lock); 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 3288adff41cSToshiaki Makita /* Must be protected by RTNL. 3298adff41cSToshiaki Makita * Must be called with vid in range from 1 to 4094 inclusive. 3308adff41cSToshiaki Makita */ 331552406c4SVlad Yasevich int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags) 332243a2e63SVlad Yasevich { 333243a2e63SVlad Yasevich struct net_port_vlans *pv = NULL; 334243a2e63SVlad Yasevich int err; 335243a2e63SVlad Yasevich 336243a2e63SVlad Yasevich ASSERT_RTNL(); 337243a2e63SVlad Yasevich 338243a2e63SVlad Yasevich pv = rtnl_dereference(port->vlan_info); 339243a2e63SVlad Yasevich if (pv) 340552406c4SVlad Yasevich return __vlan_add(pv, vid, flags); 341243a2e63SVlad Yasevich 342243a2e63SVlad Yasevich /* Create port vlan infomration 343243a2e63SVlad Yasevich */ 344243a2e63SVlad Yasevich pv = kzalloc(sizeof(*pv), GFP_KERNEL); 345243a2e63SVlad Yasevich if (!pv) { 346243a2e63SVlad Yasevich err = -ENOMEM; 347243a2e63SVlad Yasevich goto clean_up; 348243a2e63SVlad Yasevich } 349243a2e63SVlad Yasevich 350243a2e63SVlad Yasevich pv->port_idx = port->port_no; 351243a2e63SVlad Yasevich pv->parent.port = port; 352552406c4SVlad Yasevich err = __vlan_add(pv, vid, flags); 353243a2e63SVlad Yasevich if (err) 354243a2e63SVlad Yasevich goto clean_up; 355243a2e63SVlad Yasevich 356243a2e63SVlad Yasevich rcu_assign_pointer(port->vlan_info, pv); 357243a2e63SVlad Yasevich return 0; 358243a2e63SVlad Yasevich 359243a2e63SVlad Yasevich clean_up: 360243a2e63SVlad Yasevich kfree(pv); 361243a2e63SVlad Yasevich return err; 362243a2e63SVlad Yasevich } 363243a2e63SVlad Yasevich 3648adff41cSToshiaki Makita /* Must be protected by RTNL. 3658adff41cSToshiaki Makita * Must be called with vid in range from 1 to 4094 inclusive. 3668adff41cSToshiaki Makita */ 367243a2e63SVlad Yasevich int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) 368243a2e63SVlad Yasevich { 369243a2e63SVlad Yasevich struct net_port_vlans *pv; 370243a2e63SVlad Yasevich 371243a2e63SVlad Yasevich ASSERT_RTNL(); 372243a2e63SVlad Yasevich 373243a2e63SVlad Yasevich pv = rtnl_dereference(port->vlan_info); 374243a2e63SVlad Yasevich if (!pv) 375243a2e63SVlad Yasevich return -EINVAL; 376243a2e63SVlad 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 381243a2e63SVlad Yasevich return __vlan_del(pv, vid); 382243a2e63SVlad Yasevich } 383243a2e63SVlad Yasevich 384243a2e63SVlad Yasevich void nbp_vlan_flush(struct net_bridge_port *port) 385243a2e63SVlad Yasevich { 386243a2e63SVlad Yasevich struct net_port_vlans *pv; 387243a2e63SVlad Yasevich 388243a2e63SVlad Yasevich ASSERT_RTNL(); 389243a2e63SVlad Yasevich 390243a2e63SVlad Yasevich pv = rtnl_dereference(port->vlan_info); 391243a2e63SVlad Yasevich if (!pv) 392243a2e63SVlad Yasevich return; 393243a2e63SVlad Yasevich 394243a2e63SVlad Yasevich __vlan_flush(pv); 395243a2e63SVlad Yasevich } 396bc9a25d2SVlad Yasevich 397bc9a25d2SVlad Yasevich bool nbp_vlan_find(struct net_bridge_port *port, u16 vid) 398bc9a25d2SVlad Yasevich { 399bc9a25d2SVlad Yasevich struct net_port_vlans *pv; 400bc9a25d2SVlad Yasevich bool found = false; 401bc9a25d2SVlad Yasevich 402bc9a25d2SVlad Yasevich rcu_read_lock(); 403bc9a25d2SVlad Yasevich pv = rcu_dereference(port->vlan_info); 404bc9a25d2SVlad Yasevich 405bc9a25d2SVlad Yasevich if (!pv) 406bc9a25d2SVlad Yasevich goto out; 407bc9a25d2SVlad Yasevich 408bc9a25d2SVlad Yasevich if (test_bit(vid, pv->vlan_bitmap)) 409bc9a25d2SVlad Yasevich found = true; 410bc9a25d2SVlad Yasevich 411bc9a25d2SVlad Yasevich out: 412bc9a25d2SVlad Yasevich rcu_read_unlock(); 413bc9a25d2SVlad Yasevich return found; 414bc9a25d2SVlad Yasevich } 415