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 (v->port_idx) { 48bc9a25d2SVlad Yasevich p = v->parent.port; 49bc9a25d2SVlad Yasevich br = p->br; 50bc9a25d2SVlad Yasevich dev = p->dev; 51bc9a25d2SVlad Yasevich } else { 52bc9a25d2SVlad Yasevich br = v->parent.br; 53bc9a25d2SVlad Yasevich dev = br->dev; 54bc9a25d2SVlad Yasevich } 55243a2e63SVlad Yasevich 5619236837SToshiaki Makita if (p) { 57243a2e63SVlad Yasevich /* Add VLAN to the device filter if it is supported. 58bc9a25d2SVlad Yasevich * Stricly speaking, this is not necessary now, since 59bc9a25d2SVlad Yasevich * devices are made promiscuous by the bridge, but if 60bc9a25d2SVlad Yasevich * that ever changes this code will allow tagged 61bc9a25d2SVlad Yasevich * traffic to enter the bridge. 62243a2e63SVlad Yasevich */ 6319236837SToshiaki Makita err = vlan_vid_add(dev, htons(ETH_P_8021Q), vid); 64243a2e63SVlad Yasevich if (err) 65243a2e63SVlad Yasevich return err; 66243a2e63SVlad Yasevich } 67bc9a25d2SVlad Yasevich 68bc9a25d2SVlad Yasevich err = br_fdb_insert(br, p, dev->dev_addr, vid); 69bc9a25d2SVlad Yasevich if (err) { 70bc9a25d2SVlad Yasevich br_err(br, "failed insert local address into bridge " 71bc9a25d2SVlad Yasevich "forwarding table\n"); 72bc9a25d2SVlad Yasevich goto out_filt; 73bc9a25d2SVlad Yasevich } 74bc9a25d2SVlad Yasevich 75243a2e63SVlad Yasevich set_bit(vid, v->vlan_bitmap); 766cbdceebSVlad Yasevich v->num_vlans++; 7735e03f3aSVlad Yasevich __vlan_add_flags(v, vid, flags); 78552406c4SVlad Yasevich 79243a2e63SVlad Yasevich return 0; 80bc9a25d2SVlad Yasevich 81bc9a25d2SVlad Yasevich out_filt: 8219236837SToshiaki Makita if (p) 8319236837SToshiaki Makita vlan_vid_del(dev, htons(ETH_P_8021Q), vid); 84bc9a25d2SVlad Yasevich return err; 85243a2e63SVlad Yasevich } 86243a2e63SVlad Yasevich 87243a2e63SVlad Yasevich static int __vlan_del(struct net_port_vlans *v, u16 vid) 88243a2e63SVlad Yasevich { 89243a2e63SVlad Yasevich if (!test_bit(vid, v->vlan_bitmap)) 90243a2e63SVlad Yasevich return -EINVAL; 91243a2e63SVlad Yasevich 92552406c4SVlad Yasevich __vlan_delete_pvid(v, vid); 9335e03f3aSVlad Yasevich clear_bit(vid, v->untagged_bitmap); 94552406c4SVlad Yasevich 9519236837SToshiaki Makita if (v->port_idx) 9619236837SToshiaki Makita vlan_vid_del(v->parent.port->dev, htons(ETH_P_8021Q), vid); 97243a2e63SVlad Yasevich 98243a2e63SVlad Yasevich clear_bit(vid, v->vlan_bitmap); 996cbdceebSVlad Yasevich v->num_vlans--; 100ef40b7efSToshiaki Makita if (bitmap_empty(v->vlan_bitmap, VLAN_N_VID)) { 101243a2e63SVlad Yasevich if (v->port_idx) 102243a2e63SVlad Yasevich rcu_assign_pointer(v->parent.port->vlan_info, NULL); 103243a2e63SVlad Yasevich else 104243a2e63SVlad Yasevich rcu_assign_pointer(v->parent.br->vlan_info, NULL); 105243a2e63SVlad Yasevich kfree_rcu(v, rcu); 106243a2e63SVlad Yasevich } 107243a2e63SVlad Yasevich return 0; 108243a2e63SVlad Yasevich } 109243a2e63SVlad Yasevich 110243a2e63SVlad Yasevich static void __vlan_flush(struct net_port_vlans *v) 111243a2e63SVlad Yasevich { 112552406c4SVlad Yasevich smp_wmb(); 113552406c4SVlad Yasevich v->pvid = 0; 114ef40b7efSToshiaki Makita bitmap_zero(v->vlan_bitmap, VLAN_N_VID); 115243a2e63SVlad Yasevich if (v->port_idx) 116243a2e63SVlad Yasevich rcu_assign_pointer(v->parent.port->vlan_info, NULL); 117243a2e63SVlad Yasevich else 118243a2e63SVlad Yasevich rcu_assign_pointer(v->parent.br->vlan_info, NULL); 119243a2e63SVlad Yasevich kfree_rcu(v, rcu); 120243a2e63SVlad Yasevich } 121243a2e63SVlad Yasevich 12278851988SVlad Yasevich /* Strip the tag from the packet. Will return skb with tci set 0. */ 12378851988SVlad Yasevich static struct sk_buff *br_vlan_untag(struct sk_buff *skb) 12478851988SVlad Yasevich { 12578851988SVlad Yasevich if (skb->protocol != htons(ETH_P_8021Q)) { 12678851988SVlad Yasevich skb->vlan_tci = 0; 12778851988SVlad Yasevich return skb; 12878851988SVlad Yasevich } 12978851988SVlad Yasevich 13078851988SVlad Yasevich skb->vlan_tci = 0; 13178851988SVlad Yasevich skb = vlan_untag(skb); 13278851988SVlad Yasevich if (skb) 13378851988SVlad Yasevich skb->vlan_tci = 0; 13478851988SVlad Yasevich 13578851988SVlad Yasevich return skb; 13678851988SVlad Yasevich } 13778851988SVlad Yasevich 13878851988SVlad Yasevich struct sk_buff *br_handle_vlan(struct net_bridge *br, 13978851988SVlad Yasevich const struct net_port_vlans *pv, 140a37b85c9SVlad Yasevich struct sk_buff *skb) 141a37b85c9SVlad Yasevich { 142a37b85c9SVlad Yasevich u16 vid; 143a37b85c9SVlad Yasevich 14478851988SVlad Yasevich if (!br->vlan_enabled) 14578851988SVlad Yasevich goto out; 14678851988SVlad Yasevich 14778851988SVlad Yasevich /* At this point, we know that the frame was filtered and contains 14835e03f3aSVlad Yasevich * a valid vlan id. If the vlan id is set in the untagged bitmap, 1491a81a2e0Stanxiaojun * send untagged; otherwise, send tagged. 15078851988SVlad Yasevich */ 15178851988SVlad Yasevich br_vlan_get_tag(skb, &vid); 15235e03f3aSVlad Yasevich if (test_bit(vid, pv->untagged_bitmap)) 15378851988SVlad Yasevich skb = br_vlan_untag(skb); 15478851988SVlad Yasevich 15578851988SVlad Yasevich out: 15678851988SVlad Yasevich return skb; 15778851988SVlad Yasevich } 15878851988SVlad Yasevich 15978851988SVlad Yasevich /* Called under RCU */ 16078851988SVlad Yasevich bool br_allowed_ingress(struct net_bridge *br, struct net_port_vlans *v, 16178851988SVlad Yasevich struct sk_buff *skb, u16 *vid) 16278851988SVlad Yasevich { 163b90356ceSToshiaki Makita int err; 164b90356ceSToshiaki Makita 165a37b85c9SVlad Yasevich /* If VLAN filtering is disabled on the bridge, all packets are 166a37b85c9SVlad Yasevich * permitted. 167a37b85c9SVlad Yasevich */ 168a37b85c9SVlad Yasevich if (!br->vlan_enabled) 169a37b85c9SVlad Yasevich return true; 170a37b85c9SVlad Yasevich 171a37b85c9SVlad Yasevich /* If there are no vlan in the permitted list, all packets are 172a37b85c9SVlad Yasevich * rejected. 173a37b85c9SVlad Yasevich */ 174a37b85c9SVlad Yasevich if (!v) 175a37b85c9SVlad Yasevich return false; 176a37b85c9SVlad Yasevich 177b90356ceSToshiaki Makita err = br_vlan_get_tag(skb, vid); 178b90356ceSToshiaki Makita if (!*vid) { 17978851988SVlad Yasevich u16 pvid = br_get_pvid(v); 18078851988SVlad Yasevich 181b90356ceSToshiaki Makita /* Frame had a tag with VID 0 or did not have a tag. 182b90356ceSToshiaki Makita * See if pvid is set on this port. That tells us which 183b90356ceSToshiaki Makita * vlan untagged or priority-tagged traffic belongs to. 18478851988SVlad Yasevich */ 18578851988SVlad Yasevich if (pvid == VLAN_N_VID) 18678851988SVlad Yasevich return false; 18778851988SVlad Yasevich 188b90356ceSToshiaki Makita /* PVID is set on this port. Any untagged or priority-tagged 189b90356ceSToshiaki Makita * ingress frame is considered to belong to this vlan. 19078851988SVlad Yasevich */ 191dfb5fa32SToshiaki Makita *vid = pvid; 192b90356ceSToshiaki Makita if (likely(err)) 193b90356ceSToshiaki Makita /* Untagged Frame. */ 19486a9bad3SPatrick McHardy __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), pvid); 195b90356ceSToshiaki Makita else 196b90356ceSToshiaki Makita /* Priority-tagged Frame. 197b90356ceSToshiaki Makita * At this point, We know that skb->vlan_tci had 198b90356ceSToshiaki Makita * VLAN_TAG_PRESENT bit and its VID field was 0x000. 199b90356ceSToshiaki Makita * We update only VID field and preserve PCP field. 200b90356ceSToshiaki Makita */ 201b90356ceSToshiaki Makita skb->vlan_tci |= pvid; 202b90356ceSToshiaki Makita 20378851988SVlad Yasevich return true; 20478851988SVlad Yasevich } 20578851988SVlad Yasevich 20678851988SVlad Yasevich /* Frame had a valid vlan tag. See if vlan is allowed */ 20778851988SVlad Yasevich if (test_bit(*vid, v->vlan_bitmap)) 208a37b85c9SVlad Yasevich return true; 209a37b85c9SVlad Yasevich 210a37b85c9SVlad Yasevich return false; 211a37b85c9SVlad Yasevich } 212a37b85c9SVlad Yasevich 21385f46c6bSVlad Yasevich /* Called under RCU. */ 21485f46c6bSVlad Yasevich bool br_allowed_egress(struct net_bridge *br, 21585f46c6bSVlad Yasevich const struct net_port_vlans *v, 21685f46c6bSVlad Yasevich const struct sk_buff *skb) 21785f46c6bSVlad Yasevich { 21885f46c6bSVlad Yasevich u16 vid; 21985f46c6bSVlad Yasevich 22085f46c6bSVlad Yasevich if (!br->vlan_enabled) 22185f46c6bSVlad Yasevich return true; 22285f46c6bSVlad Yasevich 22385f46c6bSVlad Yasevich if (!v) 22485f46c6bSVlad Yasevich return false; 22585f46c6bSVlad Yasevich 22685f46c6bSVlad Yasevich br_vlan_get_tag(skb, &vid); 22785f46c6bSVlad Yasevich if (test_bit(vid, v->vlan_bitmap)) 22885f46c6bSVlad Yasevich return true; 22985f46c6bSVlad Yasevich 23085f46c6bSVlad Yasevich return false; 23185f46c6bSVlad Yasevich } 23285f46c6bSVlad Yasevich 2338adff41cSToshiaki Makita /* Must be protected by RTNL. 2348adff41cSToshiaki Makita * Must be called with vid in range from 1 to 4094 inclusive. 2358adff41cSToshiaki Makita */ 236552406c4SVlad Yasevich int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags) 237243a2e63SVlad Yasevich { 238243a2e63SVlad Yasevich struct net_port_vlans *pv = NULL; 239243a2e63SVlad Yasevich int err; 240243a2e63SVlad Yasevich 241243a2e63SVlad Yasevich ASSERT_RTNL(); 242243a2e63SVlad Yasevich 243243a2e63SVlad Yasevich pv = rtnl_dereference(br->vlan_info); 244243a2e63SVlad Yasevich if (pv) 245552406c4SVlad Yasevich return __vlan_add(pv, vid, flags); 246243a2e63SVlad Yasevich 247243a2e63SVlad Yasevich /* Create port vlan infomration 248243a2e63SVlad Yasevich */ 249243a2e63SVlad Yasevich pv = kzalloc(sizeof(*pv), GFP_KERNEL); 250243a2e63SVlad Yasevich if (!pv) 251243a2e63SVlad Yasevich return -ENOMEM; 252243a2e63SVlad Yasevich 253243a2e63SVlad Yasevich pv->parent.br = br; 254552406c4SVlad Yasevich err = __vlan_add(pv, vid, flags); 255243a2e63SVlad Yasevich if (err) 256243a2e63SVlad Yasevich goto out; 257243a2e63SVlad Yasevich 258243a2e63SVlad Yasevich rcu_assign_pointer(br->vlan_info, pv); 259243a2e63SVlad Yasevich return 0; 260243a2e63SVlad Yasevich out: 261243a2e63SVlad Yasevich kfree(pv); 262243a2e63SVlad Yasevich return err; 263243a2e63SVlad Yasevich } 264243a2e63SVlad Yasevich 2658adff41cSToshiaki Makita /* Must be protected by RTNL. 2668adff41cSToshiaki Makita * Must be called with vid in range from 1 to 4094 inclusive. 2678adff41cSToshiaki Makita */ 268243a2e63SVlad Yasevich int br_vlan_delete(struct net_bridge *br, u16 vid) 269243a2e63SVlad Yasevich { 270243a2e63SVlad Yasevich struct net_port_vlans *pv; 271243a2e63SVlad Yasevich 272243a2e63SVlad Yasevich ASSERT_RTNL(); 273243a2e63SVlad Yasevich 274243a2e63SVlad Yasevich pv = rtnl_dereference(br->vlan_info); 275243a2e63SVlad Yasevich if (!pv) 276243a2e63SVlad Yasevich return -EINVAL; 277243a2e63SVlad Yasevich 278424bb9c9SToshiaki Makita br_fdb_find_delete_local(br, NULL, br->dev->dev_addr, vid); 279bc9a25d2SVlad Yasevich 280243a2e63SVlad Yasevich __vlan_del(pv, vid); 281243a2e63SVlad Yasevich return 0; 282243a2e63SVlad Yasevich } 283243a2e63SVlad Yasevich 284243a2e63SVlad Yasevich void br_vlan_flush(struct net_bridge *br) 285243a2e63SVlad Yasevich { 286243a2e63SVlad Yasevich struct net_port_vlans *pv; 287243a2e63SVlad Yasevich 288243a2e63SVlad Yasevich ASSERT_RTNL(); 289243a2e63SVlad Yasevich pv = rtnl_dereference(br->vlan_info); 290243a2e63SVlad Yasevich if (!pv) 291243a2e63SVlad Yasevich return; 292243a2e63SVlad Yasevich 293243a2e63SVlad Yasevich __vlan_flush(pv); 294243a2e63SVlad Yasevich } 295243a2e63SVlad Yasevich 2962b292fb4SToshiaki Makita bool br_vlan_find(struct net_bridge *br, u16 vid) 2972b292fb4SToshiaki Makita { 2982b292fb4SToshiaki Makita struct net_port_vlans *pv; 2992b292fb4SToshiaki Makita bool found = false; 3002b292fb4SToshiaki Makita 3012b292fb4SToshiaki Makita rcu_read_lock(); 3022b292fb4SToshiaki Makita pv = rcu_dereference(br->vlan_info); 3032b292fb4SToshiaki Makita 3042b292fb4SToshiaki Makita if (!pv) 3052b292fb4SToshiaki Makita goto out; 3062b292fb4SToshiaki Makita 3072b292fb4SToshiaki Makita if (test_bit(vid, pv->vlan_bitmap)) 3082b292fb4SToshiaki Makita found = true; 3092b292fb4SToshiaki Makita 3102b292fb4SToshiaki Makita out: 3112b292fb4SToshiaki Makita rcu_read_unlock(); 3122b292fb4SToshiaki Makita return found; 3132b292fb4SToshiaki Makita } 3142b292fb4SToshiaki Makita 315243a2e63SVlad Yasevich int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val) 316243a2e63SVlad Yasevich { 317243a2e63SVlad Yasevich if (!rtnl_trylock()) 318243a2e63SVlad Yasevich return restart_syscall(); 319243a2e63SVlad Yasevich 320243a2e63SVlad Yasevich if (br->vlan_enabled == val) 321243a2e63SVlad Yasevich goto unlock; 322243a2e63SVlad Yasevich 323243a2e63SVlad Yasevich br->vlan_enabled = val; 324243a2e63SVlad Yasevich 325243a2e63SVlad Yasevich unlock: 326243a2e63SVlad Yasevich rtnl_unlock(); 327243a2e63SVlad Yasevich return 0; 328243a2e63SVlad Yasevich } 329243a2e63SVlad Yasevich 3308adff41cSToshiaki Makita /* Must be protected by RTNL. 3318adff41cSToshiaki Makita * Must be called with vid in range from 1 to 4094 inclusive. 3328adff41cSToshiaki Makita */ 333552406c4SVlad Yasevich int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags) 334243a2e63SVlad Yasevich { 335243a2e63SVlad Yasevich struct net_port_vlans *pv = NULL; 336243a2e63SVlad Yasevich int err; 337243a2e63SVlad Yasevich 338243a2e63SVlad Yasevich ASSERT_RTNL(); 339243a2e63SVlad Yasevich 340243a2e63SVlad Yasevich pv = rtnl_dereference(port->vlan_info); 341243a2e63SVlad Yasevich if (pv) 342552406c4SVlad Yasevich return __vlan_add(pv, vid, flags); 343243a2e63SVlad Yasevich 344243a2e63SVlad Yasevich /* Create port vlan infomration 345243a2e63SVlad Yasevich */ 346243a2e63SVlad Yasevich pv = kzalloc(sizeof(*pv), GFP_KERNEL); 347243a2e63SVlad Yasevich if (!pv) { 348243a2e63SVlad Yasevich err = -ENOMEM; 349243a2e63SVlad Yasevich goto clean_up; 350243a2e63SVlad Yasevich } 351243a2e63SVlad Yasevich 352243a2e63SVlad Yasevich pv->port_idx = port->port_no; 353243a2e63SVlad Yasevich pv->parent.port = port; 354552406c4SVlad Yasevich err = __vlan_add(pv, vid, flags); 355243a2e63SVlad Yasevich if (err) 356243a2e63SVlad Yasevich goto clean_up; 357243a2e63SVlad Yasevich 358243a2e63SVlad Yasevich rcu_assign_pointer(port->vlan_info, pv); 359243a2e63SVlad Yasevich return 0; 360243a2e63SVlad Yasevich 361243a2e63SVlad Yasevich clean_up: 362243a2e63SVlad Yasevich kfree(pv); 363243a2e63SVlad Yasevich return err; 364243a2e63SVlad Yasevich } 365243a2e63SVlad Yasevich 3668adff41cSToshiaki Makita /* Must be protected by RTNL. 3678adff41cSToshiaki Makita * Must be called with vid in range from 1 to 4094 inclusive. 3688adff41cSToshiaki Makita */ 369243a2e63SVlad Yasevich int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) 370243a2e63SVlad Yasevich { 371243a2e63SVlad Yasevich struct net_port_vlans *pv; 372243a2e63SVlad Yasevich 373243a2e63SVlad Yasevich ASSERT_RTNL(); 374243a2e63SVlad Yasevich 375243a2e63SVlad Yasevich pv = rtnl_dereference(port->vlan_info); 376243a2e63SVlad Yasevich if (!pv) 377243a2e63SVlad Yasevich return -EINVAL; 378243a2e63SVlad Yasevich 379424bb9c9SToshiaki Makita br_fdb_find_delete_local(port->br, port, port->dev->dev_addr, vid); 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; 387dbbaf949SToshiaki Makita u16 vid; 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 395dbbaf949SToshiaki Makita for_each_set_bit(vid, pv->vlan_bitmap, VLAN_N_VID) 396dbbaf949SToshiaki Makita vlan_vid_del(port->dev, htons(ETH_P_8021Q), vid); 397dbbaf949SToshiaki Makita 398243a2e63SVlad Yasevich __vlan_flush(pv); 399243a2e63SVlad Yasevich } 400bc9a25d2SVlad Yasevich 401bc9a25d2SVlad Yasevich bool nbp_vlan_find(struct net_bridge_port *port, u16 vid) 402bc9a25d2SVlad Yasevich { 403bc9a25d2SVlad Yasevich struct net_port_vlans *pv; 404bc9a25d2SVlad Yasevich bool found = false; 405bc9a25d2SVlad Yasevich 406bc9a25d2SVlad Yasevich rcu_read_lock(); 407bc9a25d2SVlad Yasevich pv = rcu_dereference(port->vlan_info); 408bc9a25d2SVlad Yasevich 409bc9a25d2SVlad Yasevich if (!pv) 410bc9a25d2SVlad Yasevich goto out; 411bc9a25d2SVlad Yasevich 412bc9a25d2SVlad Yasevich if (test_bit(vid, pv->vlan_bitmap)) 413bc9a25d2SVlad Yasevich found = true; 414bc9a25d2SVlad Yasevich 415bc9a25d2SVlad Yasevich out: 416bc9a25d2SVlad Yasevich rcu_read_unlock(); 417bc9a25d2SVlad Yasevich return found; 418bc9a25d2SVlad Yasevich } 419