1243a2e63SVlad Yasevich #include <linux/kernel.h> 2243a2e63SVlad Yasevich #include <linux/netdevice.h> 3243a2e63SVlad Yasevich #include <linux/rtnetlink.h> 4243a2e63SVlad Yasevich #include <linux/slab.h> 57f109539SScott Feldman #include <net/switchdev.h> 6243a2e63SVlad Yasevich 7243a2e63SVlad Yasevich #include "br_private.h" 8243a2e63SVlad Yasevich 92594e906SNikolay Aleksandrov static inline int br_vlan_cmp(struct rhashtable_compare_arg *arg, 102594e906SNikolay Aleksandrov const void *ptr) 11552406c4SVlad Yasevich { 122594e906SNikolay Aleksandrov const struct net_bridge_vlan *vle = ptr; 132594e906SNikolay Aleksandrov u16 vid = *(u16 *)arg->key; 142594e906SNikolay Aleksandrov 152594e906SNikolay Aleksandrov return vle->vid != vid; 162594e906SNikolay Aleksandrov } 172594e906SNikolay Aleksandrov 182594e906SNikolay Aleksandrov static const struct rhashtable_params br_vlan_rht_params = { 192594e906SNikolay Aleksandrov .head_offset = offsetof(struct net_bridge_vlan, vnode), 202594e906SNikolay Aleksandrov .key_offset = offsetof(struct net_bridge_vlan, vid), 212594e906SNikolay Aleksandrov .key_len = sizeof(u16), 228af78b64SNikolay Aleksandrov .nelem_hint = 3, 238af78b64SNikolay Aleksandrov .locks_mul = 1, 242594e906SNikolay Aleksandrov .max_size = VLAN_N_VID, 252594e906SNikolay Aleksandrov .obj_cmpfn = br_vlan_cmp, 262594e906SNikolay Aleksandrov .automatic_shrinking = true, 272594e906SNikolay Aleksandrov }; 282594e906SNikolay Aleksandrov 292594e906SNikolay Aleksandrov static struct net_bridge_vlan *br_vlan_lookup(struct rhashtable *tbl, u16 vid) 302594e906SNikolay Aleksandrov { 312594e906SNikolay Aleksandrov return rhashtable_lookup_fast(tbl, &vid, br_vlan_rht_params); 322594e906SNikolay Aleksandrov } 332594e906SNikolay Aleksandrov 3477751ee8SNikolay Aleksandrov static void __vlan_add_pvid(struct net_bridge_vlan_group *vg, u16 vid) 352594e906SNikolay Aleksandrov { 3677751ee8SNikolay Aleksandrov if (vg->pvid == vid) 37552406c4SVlad Yasevich return; 38552406c4SVlad Yasevich 39552406c4SVlad Yasevich smp_wmb(); 4077751ee8SNikolay Aleksandrov vg->pvid = vid; 41552406c4SVlad Yasevich } 42552406c4SVlad Yasevich 4377751ee8SNikolay Aleksandrov static void __vlan_delete_pvid(struct net_bridge_vlan_group *vg, u16 vid) 44552406c4SVlad Yasevich { 4577751ee8SNikolay Aleksandrov if (vg->pvid != vid) 46552406c4SVlad Yasevich return; 47552406c4SVlad Yasevich 48552406c4SVlad Yasevich smp_wmb(); 4977751ee8SNikolay Aleksandrov vg->pvid = 0; 50552406c4SVlad Yasevich } 51552406c4SVlad Yasevich 522594e906SNikolay Aleksandrov static void __vlan_add_flags(struct net_bridge_vlan *v, u16 flags) 5335e03f3aSVlad Yasevich { 5477751ee8SNikolay Aleksandrov struct net_bridge_vlan_group *vg; 5577751ee8SNikolay Aleksandrov 562594e906SNikolay Aleksandrov if (br_vlan_is_master(v)) 5777751ee8SNikolay Aleksandrov vg = v->br->vlgrp; 58635126b7SVlad Yasevich else 5977751ee8SNikolay Aleksandrov vg = v->port->vlgrp; 6077751ee8SNikolay Aleksandrov 6177751ee8SNikolay Aleksandrov if (flags & BRIDGE_VLAN_INFO_PVID) 6277751ee8SNikolay Aleksandrov __vlan_add_pvid(vg, v->vid); 632594e906SNikolay Aleksandrov else 6477751ee8SNikolay Aleksandrov __vlan_delete_pvid(vg, v->vid); 6535e03f3aSVlad Yasevich 6635e03f3aSVlad Yasevich if (flags & BRIDGE_VLAN_INFO_UNTAGGED) 672594e906SNikolay Aleksandrov v->flags |= BRIDGE_VLAN_INFO_UNTAGGED; 68635126b7SVlad Yasevich else 692594e906SNikolay Aleksandrov v->flags &= ~BRIDGE_VLAN_INFO_UNTAGGED; 7035e03f3aSVlad Yasevich } 7135e03f3aSVlad Yasevich 727f109539SScott Feldman static int __vlan_vid_add(struct net_device *dev, struct net_bridge *br, 737f109539SScott Feldman u16 vid, u16 flags) 747f109539SScott Feldman { 757f109539SScott Feldman const struct net_device_ops *ops = dev->netdev_ops; 767f109539SScott Feldman int err; 777f109539SScott Feldman 787f109539SScott Feldman /* If driver uses VLAN ndo ops, use 8021q to install vid 797f109539SScott Feldman * on device, otherwise try switchdev ops to install vid. 807f109539SScott Feldman */ 817f109539SScott Feldman 827f109539SScott Feldman if (ops->ndo_vlan_rx_add_vid) { 837f109539SScott Feldman err = vlan_vid_add(dev, br->vlan_proto, vid); 847f109539SScott Feldman } else { 858f24f309SJiri Pirko struct switchdev_obj_port_vlan v = { 869e8f4a54SJiri Pirko .obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN, 877f109539SScott Feldman .flags = flags, 883e3a78b4SScott Feldman .vid_begin = vid, 897f109539SScott Feldman .vid_end = vid, 907f109539SScott Feldman }; 917f109539SScott Feldman 929e8f4a54SJiri Pirko err = switchdev_port_obj_add(dev, &v.obj); 937f109539SScott Feldman if (err == -EOPNOTSUPP) 947f109539SScott Feldman err = 0; 957f109539SScott Feldman } 967f109539SScott Feldman 977f109539SScott Feldman return err; 987f109539SScott Feldman } 997f109539SScott Feldman 1002594e906SNikolay Aleksandrov static void __vlan_add_list(struct net_bridge_vlan *v) 101243a2e63SVlad Yasevich { 1022594e906SNikolay Aleksandrov struct list_head *headp, *hpos; 1032594e906SNikolay Aleksandrov struct net_bridge_vlan *vent; 104243a2e63SVlad Yasevich 1052594e906SNikolay Aleksandrov headp = br_vlan_is_master(v) ? &v->br->vlgrp->vlan_list : 1062594e906SNikolay Aleksandrov &v->port->vlgrp->vlan_list; 1072594e906SNikolay Aleksandrov list_for_each_prev(hpos, headp) { 1082594e906SNikolay Aleksandrov vent = list_entry(hpos, struct net_bridge_vlan, vlist); 1092594e906SNikolay Aleksandrov if (v->vid < vent->vid) 1102594e906SNikolay Aleksandrov continue; 1112594e906SNikolay Aleksandrov else 1122594e906SNikolay Aleksandrov break; 1132594e906SNikolay Aleksandrov } 114586c2b57SNikolay Aleksandrov list_add_rcu(&v->vlist, hpos); 115552406c4SVlad Yasevich } 116243a2e63SVlad Yasevich 1172594e906SNikolay Aleksandrov static void __vlan_del_list(struct net_bridge_vlan *v) 1182594e906SNikolay Aleksandrov { 119586c2b57SNikolay Aleksandrov list_del_rcu(&v->vlist); 120243a2e63SVlad Yasevich } 121243a2e63SVlad Yasevich 122bf361ad3SVivien Didelot static int __vlan_vid_del(struct net_device *dev, struct net_bridge *br, 1237f109539SScott Feldman u16 vid) 1247f109539SScott Feldman { 1257f109539SScott Feldman const struct net_device_ops *ops = dev->netdev_ops; 126bf361ad3SVivien Didelot int err = 0; 1277f109539SScott Feldman 1287f109539SScott Feldman /* If driver uses VLAN ndo ops, use 8021q to delete vid 1297f109539SScott Feldman * on device, otherwise try switchdev ops to delete vid. 1307f109539SScott Feldman */ 1317f109539SScott Feldman 1327f109539SScott Feldman if (ops->ndo_vlan_rx_kill_vid) { 1337f109539SScott Feldman vlan_vid_del(dev, br->vlan_proto, vid); 1347f109539SScott Feldman } else { 1358f24f309SJiri Pirko struct switchdev_obj_port_vlan v = { 1369e8f4a54SJiri Pirko .obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN, 1373e3a78b4SScott Feldman .vid_begin = vid, 1387f109539SScott Feldman .vid_end = vid, 1397f109539SScott Feldman }; 1407f109539SScott Feldman 1419e8f4a54SJiri Pirko err = switchdev_port_obj_del(dev, &v.obj); 142bf361ad3SVivien Didelot if (err == -EOPNOTSUPP) 143bf361ad3SVivien Didelot err = 0; 1447f109539SScott Feldman } 145bf361ad3SVivien Didelot 146bf361ad3SVivien Didelot return err; 1477f109539SScott Feldman } 1487f109539SScott Feldman 149f8ed289fSNikolay Aleksandrov /* Returns a master vlan, if it didn't exist it gets created. In all cases a 150f8ed289fSNikolay Aleksandrov * a reference is taken to the master vlan before returning. 151f8ed289fSNikolay Aleksandrov */ 152f8ed289fSNikolay Aleksandrov static struct net_bridge_vlan *br_vlan_get_master(struct net_bridge *br, u16 vid) 153f8ed289fSNikolay Aleksandrov { 154f8ed289fSNikolay Aleksandrov struct net_bridge_vlan *masterv; 155f8ed289fSNikolay Aleksandrov 156f8ed289fSNikolay Aleksandrov masterv = br_vlan_find(br->vlgrp, vid); 157f8ed289fSNikolay Aleksandrov if (!masterv) { 158f8ed289fSNikolay Aleksandrov /* missing global ctx, create it now */ 159f8ed289fSNikolay Aleksandrov if (br_vlan_add(br, vid, 0)) 160f8ed289fSNikolay Aleksandrov return NULL; 161f8ed289fSNikolay Aleksandrov masterv = br_vlan_find(br->vlgrp, vid); 162f8ed289fSNikolay Aleksandrov if (WARN_ON(!masterv)) 163f8ed289fSNikolay Aleksandrov return NULL; 164f8ed289fSNikolay Aleksandrov } 165f8ed289fSNikolay Aleksandrov atomic_inc(&masterv->refcnt); 166f8ed289fSNikolay Aleksandrov 167f8ed289fSNikolay Aleksandrov return masterv; 168f8ed289fSNikolay Aleksandrov } 169f8ed289fSNikolay Aleksandrov 170f8ed289fSNikolay Aleksandrov static void br_vlan_put_master(struct net_bridge_vlan *masterv) 171f8ed289fSNikolay Aleksandrov { 172f8ed289fSNikolay Aleksandrov if (!br_vlan_is_master(masterv)) 173f8ed289fSNikolay Aleksandrov return; 174f8ed289fSNikolay Aleksandrov 175f8ed289fSNikolay Aleksandrov if (atomic_dec_and_test(&masterv->refcnt)) { 176f8ed289fSNikolay Aleksandrov rhashtable_remove_fast(&masterv->br->vlgrp->vlan_hash, 177f8ed289fSNikolay Aleksandrov &masterv->vnode, br_vlan_rht_params); 178f8ed289fSNikolay Aleksandrov __vlan_del_list(masterv); 179f8ed289fSNikolay Aleksandrov kfree_rcu(masterv, rcu); 180f8ed289fSNikolay Aleksandrov } 181f8ed289fSNikolay Aleksandrov } 182f8ed289fSNikolay Aleksandrov 1832594e906SNikolay Aleksandrov /* This is the shared VLAN add function which works for both ports and bridge 1842594e906SNikolay Aleksandrov * devices. There are four possible calls to this function in terms of the 1852594e906SNikolay Aleksandrov * vlan entry type: 1862594e906SNikolay Aleksandrov * 1. vlan is being added on a port (no master flags, global entry exists) 1872594e906SNikolay Aleksandrov * 2. vlan is being added on a bridge (both master and brvlan flags) 1882594e906SNikolay Aleksandrov * 3. vlan is being added on a port, but a global entry didn't exist which 1892594e906SNikolay Aleksandrov * is being created right now (master flag set, brvlan flag unset), the 1902594e906SNikolay Aleksandrov * global entry is used for global per-vlan features, but not for filtering 1912594e906SNikolay Aleksandrov * 4. same as 3 but with both master and brvlan flags set so the entry 1922594e906SNikolay Aleksandrov * will be used for filtering in both the port and the bridge 1932594e906SNikolay Aleksandrov */ 1942594e906SNikolay Aleksandrov static int __vlan_add(struct net_bridge_vlan *v, u16 flags) 195243a2e63SVlad Yasevich { 1962594e906SNikolay Aleksandrov struct net_bridge_vlan *masterv = NULL; 1972594e906SNikolay Aleksandrov struct net_bridge_port *p = NULL; 1982594e906SNikolay Aleksandrov struct rhashtable *tbl; 1992594e906SNikolay Aleksandrov struct net_device *dev; 2002594e906SNikolay Aleksandrov struct net_bridge *br; 201bf361ad3SVivien Didelot int err; 202bf361ad3SVivien Didelot 2032594e906SNikolay Aleksandrov if (br_vlan_is_master(v)) { 2042594e906SNikolay Aleksandrov br = v->br; 2052594e906SNikolay Aleksandrov dev = br->dev; 2062594e906SNikolay Aleksandrov tbl = &br->vlgrp->vlan_hash; 2072594e906SNikolay Aleksandrov } else { 2082594e906SNikolay Aleksandrov p = v->port; 2092594e906SNikolay Aleksandrov br = p->br; 2102594e906SNikolay Aleksandrov dev = p->dev; 2112594e906SNikolay Aleksandrov tbl = &p->vlgrp->vlan_hash; 2122594e906SNikolay Aleksandrov } 2132594e906SNikolay Aleksandrov 2142594e906SNikolay Aleksandrov if (p) { 2152594e906SNikolay Aleksandrov u16 master_flags = flags; 2162594e906SNikolay Aleksandrov 2172594e906SNikolay Aleksandrov /* Add VLAN to the device filter if it is supported. 2182594e906SNikolay Aleksandrov * This ensures tagged traffic enters the bridge when 2192594e906SNikolay Aleksandrov * promiscuous mode is disabled by br_manage_promisc(). 2202594e906SNikolay Aleksandrov */ 2212594e906SNikolay Aleksandrov err = __vlan_vid_add(dev, br, v->vid, flags); 222bf361ad3SVivien Didelot if (err) 2232594e906SNikolay Aleksandrov goto out; 2242594e906SNikolay Aleksandrov 2252594e906SNikolay Aleksandrov /* need to work on the master vlan too */ 2262594e906SNikolay Aleksandrov if (flags & BRIDGE_VLAN_INFO_MASTER) { 2272594e906SNikolay Aleksandrov master_flags |= BRIDGE_VLAN_INFO_BRENTRY; 2282594e906SNikolay Aleksandrov err = br_vlan_add(br, v->vid, master_flags); 2292594e906SNikolay Aleksandrov if (err) 2302594e906SNikolay Aleksandrov goto out_filt; 2312594e906SNikolay Aleksandrov } 2322594e906SNikolay Aleksandrov 233f8ed289fSNikolay Aleksandrov masterv = br_vlan_get_master(br, v->vid); 234f8ed289fSNikolay Aleksandrov if (!masterv) 2352594e906SNikolay Aleksandrov goto out_filt; 2362594e906SNikolay Aleksandrov v->brvlan = masterv; 2372594e906SNikolay Aleksandrov } 2382594e906SNikolay Aleksandrov 2392594e906SNikolay Aleksandrov /* Add the dev mac only if it's a usable vlan */ 2402594e906SNikolay Aleksandrov if (br_vlan_should_use(v)) { 2412594e906SNikolay Aleksandrov err = br_fdb_insert(br, p, dev->dev_addr, v->vid); 2422594e906SNikolay Aleksandrov if (err) { 2432594e906SNikolay Aleksandrov br_err(br, "failed insert local address into bridge forwarding table\n"); 2442594e906SNikolay Aleksandrov goto out_filt; 2452594e906SNikolay Aleksandrov } 2462594e906SNikolay Aleksandrov } 2472594e906SNikolay Aleksandrov 2482594e906SNikolay Aleksandrov err = rhashtable_lookup_insert_fast(tbl, &v->vnode, br_vlan_rht_params); 2492594e906SNikolay Aleksandrov if (err) 2502594e906SNikolay Aleksandrov goto out_fdb_insert; 2512594e906SNikolay Aleksandrov 2522594e906SNikolay Aleksandrov __vlan_add_list(v); 2532594e906SNikolay Aleksandrov __vlan_add_flags(v, flags); 2542594e906SNikolay Aleksandrov if (br_vlan_is_master(v)) { 2552594e906SNikolay Aleksandrov if (br_vlan_is_brentry(v)) 2562594e906SNikolay Aleksandrov br->vlgrp->num_vlans++; 2572594e906SNikolay Aleksandrov } else { 2582594e906SNikolay Aleksandrov p->vlgrp->num_vlans++; 2592594e906SNikolay Aleksandrov } 2602594e906SNikolay Aleksandrov out: 2612594e906SNikolay Aleksandrov return err; 2622594e906SNikolay Aleksandrov 2632594e906SNikolay Aleksandrov out_fdb_insert: 2642594e906SNikolay Aleksandrov br_fdb_find_delete_local(br, p, br->dev->dev_addr, v->vid); 2652594e906SNikolay Aleksandrov 2662594e906SNikolay Aleksandrov out_filt: 2672594e906SNikolay Aleksandrov if (p) { 2682594e906SNikolay Aleksandrov __vlan_vid_del(dev, br, v->vid); 2692594e906SNikolay Aleksandrov if (masterv) { 270f8ed289fSNikolay Aleksandrov br_vlan_put_master(masterv); 2712594e906SNikolay Aleksandrov v->brvlan = NULL; 2722594e906SNikolay Aleksandrov } 2732594e906SNikolay Aleksandrov } 2742594e906SNikolay Aleksandrov 2752594e906SNikolay Aleksandrov goto out; 2762594e906SNikolay Aleksandrov } 2772594e906SNikolay Aleksandrov 2782594e906SNikolay Aleksandrov static int __vlan_del(struct net_bridge_vlan *v) 2792594e906SNikolay Aleksandrov { 2802594e906SNikolay Aleksandrov struct net_bridge_vlan *masterv = v; 28177751ee8SNikolay Aleksandrov struct net_bridge_vlan_group *vg; 2822594e906SNikolay Aleksandrov struct net_bridge_port *p = NULL; 2832594e906SNikolay Aleksandrov struct net_bridge *br; 2842594e906SNikolay Aleksandrov int err = 0; 2852594e906SNikolay Aleksandrov 2862594e906SNikolay Aleksandrov if (br_vlan_is_master(v)) { 2872594e906SNikolay Aleksandrov br = v->br; 28877751ee8SNikolay Aleksandrov vg = v->br->vlgrp; 2892594e906SNikolay Aleksandrov } else { 2902594e906SNikolay Aleksandrov p = v->port; 2912594e906SNikolay Aleksandrov br = p->br; 29277751ee8SNikolay Aleksandrov vg = v->port->vlgrp; 2932594e906SNikolay Aleksandrov masterv = v->brvlan; 2942594e906SNikolay Aleksandrov } 2952594e906SNikolay Aleksandrov 29677751ee8SNikolay Aleksandrov __vlan_delete_pvid(vg, v->vid); 2972594e906SNikolay Aleksandrov if (p) { 2982594e906SNikolay Aleksandrov err = __vlan_vid_del(p->dev, p->br, v->vid); 2992594e906SNikolay Aleksandrov if (err) 3002594e906SNikolay Aleksandrov goto out; 3012594e906SNikolay Aleksandrov } 3022594e906SNikolay Aleksandrov 3032594e906SNikolay Aleksandrov if (br_vlan_is_master(v)) { 3042594e906SNikolay Aleksandrov if (br_vlan_is_brentry(v)) { 3052594e906SNikolay Aleksandrov v->flags &= ~BRIDGE_VLAN_INFO_BRENTRY; 3062594e906SNikolay Aleksandrov br->vlgrp->num_vlans--; 3072594e906SNikolay Aleksandrov } 3082594e906SNikolay Aleksandrov } else { 3092594e906SNikolay Aleksandrov p->vlgrp->num_vlans--; 3102594e906SNikolay Aleksandrov } 3112594e906SNikolay Aleksandrov 3122594e906SNikolay Aleksandrov if (masterv != v) { 31377751ee8SNikolay Aleksandrov rhashtable_remove_fast(&vg->vlan_hash, &v->vnode, 31477751ee8SNikolay Aleksandrov br_vlan_rht_params); 3152594e906SNikolay Aleksandrov __vlan_del_list(v); 3162594e906SNikolay Aleksandrov kfree_rcu(v, rcu); 3172594e906SNikolay Aleksandrov } 3182594e906SNikolay Aleksandrov 319f8ed289fSNikolay Aleksandrov br_vlan_put_master(masterv); 3202594e906SNikolay Aleksandrov out: 321bf361ad3SVivien Didelot return err; 3228580e211SToshiaki Makita } 323243a2e63SVlad Yasevich 32477751ee8SNikolay Aleksandrov static void __vlan_flush(struct net_bridge_vlan_group *vlgrp) 325243a2e63SVlad Yasevich { 3262594e906SNikolay Aleksandrov struct net_bridge_vlan *vlan, *tmp; 3272594e906SNikolay Aleksandrov 32877751ee8SNikolay Aleksandrov __vlan_delete_pvid(vlgrp, vlgrp->pvid); 3292594e906SNikolay Aleksandrov list_for_each_entry_safe(vlan, tmp, &vlgrp->vlan_list, vlist) 3302594e906SNikolay Aleksandrov __vlan_del(vlan); 3312594e906SNikolay Aleksandrov rhashtable_destroy(&vlgrp->vlan_hash); 3322594e906SNikolay Aleksandrov kfree(vlgrp); 333243a2e63SVlad Yasevich } 334243a2e63SVlad Yasevich 33578851988SVlad Yasevich struct sk_buff *br_handle_vlan(struct net_bridge *br, 3362594e906SNikolay Aleksandrov struct net_bridge_vlan_group *vg, 337a37b85c9SVlad Yasevich struct sk_buff *skb) 338a37b85c9SVlad Yasevich { 3392594e906SNikolay Aleksandrov struct net_bridge_vlan *v; 340a37b85c9SVlad Yasevich u16 vid; 341a37b85c9SVlad Yasevich 34220adfa1aSVlad Yasevich /* If this packet was not filtered at input, let it pass */ 34320adfa1aSVlad Yasevich if (!BR_INPUT_SKB_CB(skb)->vlan_filtered) 34478851988SVlad Yasevich goto out; 34578851988SVlad Yasevich 3462594e906SNikolay Aleksandrov /* At this point, we know that the frame was filtered and contains 3472594e906SNikolay Aleksandrov * a valid vlan id. If the vlan id has untagged flag set, 3482594e906SNikolay Aleksandrov * send untagged; otherwise, send tagged. 3492594e906SNikolay Aleksandrov */ 3502594e906SNikolay Aleksandrov br_vlan_get_tag(skb, &vid); 3512594e906SNikolay Aleksandrov v = br_vlan_find(vg, vid); 3522594e906SNikolay Aleksandrov /* Vlan entry must be configured at this point. The 353fc92f745SVlad Yasevich * only exception is the bridge is set in promisc mode and the 354fc92f745SVlad Yasevich * packet is destined for the bridge device. In this case 355fc92f745SVlad Yasevich * pass the packet as is. 356fc92f745SVlad Yasevich */ 3572594e906SNikolay Aleksandrov if (!v || !br_vlan_should_use(v)) { 358fc92f745SVlad Yasevich if ((br->dev->flags & IFF_PROMISC) && skb->dev == br->dev) { 359fc92f745SVlad Yasevich goto out; 360fc92f745SVlad Yasevich } else { 361fc92f745SVlad Yasevich kfree_skb(skb); 362fc92f745SVlad Yasevich return NULL; 363fc92f745SVlad Yasevich } 364fc92f745SVlad Yasevich } 3652594e906SNikolay Aleksandrov if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED) 36699b192daSToshiaki Makita skb->vlan_tci = 0; 36778851988SVlad Yasevich 36878851988SVlad Yasevich out: 36978851988SVlad Yasevich return skb; 37078851988SVlad Yasevich } 37178851988SVlad Yasevich 37278851988SVlad Yasevich /* Called under RCU */ 37377751ee8SNikolay Aleksandrov static bool __allowed_ingress(struct net_bridge_vlan_group *vg, __be16 proto, 37478851988SVlad Yasevich struct sk_buff *skb, u16 *vid) 37578851988SVlad Yasevich { 3762594e906SNikolay Aleksandrov const struct net_bridge_vlan *v; 3778580e211SToshiaki Makita bool tagged; 378a37b85c9SVlad Yasevich 37920adfa1aSVlad Yasevich BR_INPUT_SKB_CB(skb)->vlan_filtered = true; 38012464bb8SToshiaki Makita /* If vlan tx offload is disabled on bridge device and frame was 38112464bb8SToshiaki Makita * sent from vlan device on the bridge device, it does not have 38212464bb8SToshiaki Makita * HW accelerated vlan tag. 38312464bb8SToshiaki Makita */ 384df8a39deSJiri Pirko if (unlikely(!skb_vlan_tag_present(skb) && 3858580e211SToshiaki Makita skb->protocol == proto)) { 3860d5501c1SVlad Yasevich skb = skb_vlan_untag(skb); 38712464bb8SToshiaki Makita if (unlikely(!skb)) 38812464bb8SToshiaki Makita return false; 38912464bb8SToshiaki Makita } 39012464bb8SToshiaki Makita 3918580e211SToshiaki Makita if (!br_vlan_get_tag(skb, vid)) { 3928580e211SToshiaki Makita /* Tagged frame */ 3938580e211SToshiaki Makita if (skb->vlan_proto != proto) { 3948580e211SToshiaki Makita /* Protocol-mismatch, empty out vlan_tci for new tag */ 3958580e211SToshiaki Makita skb_push(skb, ETH_HLEN); 39662749e2cSJiri Pirko skb = vlan_insert_tag_set_proto(skb, skb->vlan_proto, 397df8a39deSJiri Pirko skb_vlan_tag_get(skb)); 3988580e211SToshiaki Makita if (unlikely(!skb)) 3998580e211SToshiaki Makita return false; 4008580e211SToshiaki Makita 4018580e211SToshiaki Makita skb_pull(skb, ETH_HLEN); 4028580e211SToshiaki Makita skb_reset_mac_len(skb); 4038580e211SToshiaki Makita *vid = 0; 4048580e211SToshiaki Makita tagged = false; 4058580e211SToshiaki Makita } else { 4068580e211SToshiaki Makita tagged = true; 4078580e211SToshiaki Makita } 4088580e211SToshiaki Makita } else { 4098580e211SToshiaki Makita /* Untagged frame */ 4108580e211SToshiaki Makita tagged = false; 4118580e211SToshiaki Makita } 4128580e211SToshiaki Makita 413b90356ceSToshiaki Makita if (!*vid) { 41477751ee8SNikolay Aleksandrov u16 pvid = br_get_pvid(vg); 41577751ee8SNikolay Aleksandrov 416b90356ceSToshiaki Makita /* Frame had a tag with VID 0 or did not have a tag. 417b90356ceSToshiaki Makita * See if pvid is set on this port. That tells us which 418b90356ceSToshiaki Makita * vlan untagged or priority-tagged traffic belongs to. 41978851988SVlad Yasevich */ 4203df6bf45SVlad Yasevich if (!pvid) 421eb707618SToshiaki Makita goto drop; 42278851988SVlad Yasevich 423b90356ceSToshiaki Makita /* PVID is set on this port. Any untagged or priority-tagged 424b90356ceSToshiaki Makita * ingress frame is considered to belong to this vlan. 42578851988SVlad Yasevich */ 426dfb5fa32SToshiaki Makita *vid = pvid; 4278580e211SToshiaki Makita if (likely(!tagged)) 428b90356ceSToshiaki Makita /* Untagged Frame. */ 4298580e211SToshiaki Makita __vlan_hwaccel_put_tag(skb, proto, pvid); 430b90356ceSToshiaki Makita else 431b90356ceSToshiaki Makita /* Priority-tagged Frame. 432b90356ceSToshiaki Makita * At this point, We know that skb->vlan_tci had 433b90356ceSToshiaki Makita * VLAN_TAG_PRESENT bit and its VID field was 0x000. 434b90356ceSToshiaki Makita * We update only VID field and preserve PCP field. 435b90356ceSToshiaki Makita */ 436b90356ceSToshiaki Makita skb->vlan_tci |= pvid; 437b90356ceSToshiaki Makita 43878851988SVlad Yasevich return true; 43978851988SVlad Yasevich } 44078851988SVlad Yasevich 44178851988SVlad Yasevich /* Frame had a valid vlan tag. See if vlan is allowed */ 44277751ee8SNikolay Aleksandrov v = br_vlan_find(vg, *vid); 4432594e906SNikolay Aleksandrov if (v && br_vlan_should_use(v)) 444a37b85c9SVlad Yasevich return true; 445eb707618SToshiaki Makita drop: 446eb707618SToshiaki Makita kfree_skb(skb); 447a37b85c9SVlad Yasevich return false; 448a37b85c9SVlad Yasevich } 449a37b85c9SVlad Yasevich 45077751ee8SNikolay Aleksandrov bool br_allowed_ingress(const struct net_bridge *br, 45177751ee8SNikolay Aleksandrov struct net_bridge_vlan_group *vg, struct sk_buff *skb, 4522594e906SNikolay Aleksandrov u16 *vid) 4532594e906SNikolay Aleksandrov { 4542594e906SNikolay Aleksandrov /* If VLAN filtering is disabled on the bridge, all packets are 4552594e906SNikolay Aleksandrov * permitted. 4562594e906SNikolay Aleksandrov */ 4572594e906SNikolay Aleksandrov if (!br->vlan_enabled) { 4582594e906SNikolay Aleksandrov BR_INPUT_SKB_CB(skb)->vlan_filtered = false; 4592594e906SNikolay Aleksandrov return true; 4602594e906SNikolay Aleksandrov } 4612594e906SNikolay Aleksandrov 46277751ee8SNikolay Aleksandrov return __allowed_ingress(vg, br->vlan_proto, skb, vid); 4632594e906SNikolay Aleksandrov } 4642594e906SNikolay Aleksandrov 46585f46c6bSVlad Yasevich /* Called under RCU. */ 4662594e906SNikolay Aleksandrov bool br_allowed_egress(struct net_bridge_vlan_group *vg, 46785f46c6bSVlad Yasevich const struct sk_buff *skb) 46885f46c6bSVlad Yasevich { 4692594e906SNikolay Aleksandrov const struct net_bridge_vlan *v; 47085f46c6bSVlad Yasevich u16 vid; 47185f46c6bSVlad Yasevich 47220adfa1aSVlad Yasevich /* If this packet was not filtered at input, let it pass */ 47320adfa1aSVlad Yasevich if (!BR_INPUT_SKB_CB(skb)->vlan_filtered) 47485f46c6bSVlad Yasevich return true; 47585f46c6bSVlad Yasevich 47685f46c6bSVlad Yasevich br_vlan_get_tag(skb, &vid); 4772594e906SNikolay Aleksandrov v = br_vlan_find(vg, vid); 4782594e906SNikolay Aleksandrov if (v && br_vlan_should_use(v)) 47985f46c6bSVlad Yasevich return true; 48085f46c6bSVlad Yasevich 48185f46c6bSVlad Yasevich return false; 48285f46c6bSVlad Yasevich } 48385f46c6bSVlad Yasevich 484e0d7968aSToshiaki Makita /* Called under RCU */ 485e0d7968aSToshiaki Makita bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid) 486e0d7968aSToshiaki Makita { 487468e7944SNikolay Aleksandrov struct net_bridge_vlan_group *vg; 488e0d7968aSToshiaki Makita struct net_bridge *br = p->br; 489e0d7968aSToshiaki Makita 49020adfa1aSVlad Yasevich /* If filtering was disabled at input, let it pass. */ 491c095f248SVlad Yasevich if (!br->vlan_enabled) 492e0d7968aSToshiaki Makita return true; 493e0d7968aSToshiaki Makita 494468e7944SNikolay Aleksandrov vg = p->vlgrp; 495468e7944SNikolay Aleksandrov if (!vg || !vg->num_vlans) 496e0d7968aSToshiaki Makita return false; 497e0d7968aSToshiaki Makita 4988580e211SToshiaki Makita if (!br_vlan_get_tag(skb, vid) && skb->vlan_proto != br->vlan_proto) 4998580e211SToshiaki Makita *vid = 0; 5008580e211SToshiaki Makita 501e0d7968aSToshiaki Makita if (!*vid) { 50277751ee8SNikolay Aleksandrov *vid = br_get_pvid(vg); 5033df6bf45SVlad Yasevich if (!*vid) 504e0d7968aSToshiaki Makita return false; 505e0d7968aSToshiaki Makita 506e0d7968aSToshiaki Makita return true; 507e0d7968aSToshiaki Makita } 508e0d7968aSToshiaki Makita 50977751ee8SNikolay Aleksandrov if (br_vlan_find(vg, *vid)) 510e0d7968aSToshiaki Makita return true; 511e0d7968aSToshiaki Makita 512e0d7968aSToshiaki Makita return false; 513e0d7968aSToshiaki Makita } 514e0d7968aSToshiaki Makita 5158adff41cSToshiaki Makita /* Must be protected by RTNL. 5168adff41cSToshiaki Makita * Must be called with vid in range from 1 to 4094 inclusive. 5178adff41cSToshiaki Makita */ 518552406c4SVlad Yasevich int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags) 519243a2e63SVlad Yasevich { 5202594e906SNikolay Aleksandrov struct net_bridge_vlan *vlan; 5212594e906SNikolay Aleksandrov int ret; 522243a2e63SVlad Yasevich 523243a2e63SVlad Yasevich ASSERT_RTNL(); 524243a2e63SVlad Yasevich 5252594e906SNikolay Aleksandrov vlan = br_vlan_find(br->vlgrp, vid); 5262594e906SNikolay Aleksandrov if (vlan) { 5272594e906SNikolay Aleksandrov if (!br_vlan_is_brentry(vlan)) { 5282594e906SNikolay Aleksandrov /* Trying to change flags of non-existent bridge vlan */ 5292594e906SNikolay Aleksandrov if (!(flags & BRIDGE_VLAN_INFO_BRENTRY)) 5302594e906SNikolay Aleksandrov return -EINVAL; 5312594e906SNikolay Aleksandrov /* It was only kept for port vlans, now make it real */ 5322594e906SNikolay Aleksandrov ret = br_fdb_insert(br, NULL, br->dev->dev_addr, 5332594e906SNikolay Aleksandrov vlan->vid); 5342594e906SNikolay Aleksandrov if (ret) { 5352594e906SNikolay Aleksandrov br_err(br, "failed insert local address into bridge forwarding table\n"); 5362594e906SNikolay Aleksandrov return ret; 5372594e906SNikolay Aleksandrov } 5382594e906SNikolay Aleksandrov atomic_inc(&vlan->refcnt); 5392594e906SNikolay Aleksandrov vlan->flags |= BRIDGE_VLAN_INFO_BRENTRY; 5402594e906SNikolay Aleksandrov br->vlgrp->num_vlans++; 5412594e906SNikolay Aleksandrov } 5422594e906SNikolay Aleksandrov __vlan_add_flags(vlan, flags); 5432594e906SNikolay Aleksandrov return 0; 5442594e906SNikolay Aleksandrov } 545243a2e63SVlad Yasevich 5462594e906SNikolay Aleksandrov vlan = kzalloc(sizeof(*vlan), GFP_KERNEL); 5472594e906SNikolay Aleksandrov if (!vlan) 548243a2e63SVlad Yasevich return -ENOMEM; 549243a2e63SVlad Yasevich 5502594e906SNikolay Aleksandrov vlan->vid = vid; 5512594e906SNikolay Aleksandrov vlan->flags = flags | BRIDGE_VLAN_INFO_MASTER; 5522594e906SNikolay Aleksandrov vlan->flags &= ~BRIDGE_VLAN_INFO_PVID; 5532594e906SNikolay Aleksandrov vlan->br = br; 5542594e906SNikolay Aleksandrov if (flags & BRIDGE_VLAN_INFO_BRENTRY) 5552594e906SNikolay Aleksandrov atomic_set(&vlan->refcnt, 1); 5562594e906SNikolay Aleksandrov ret = __vlan_add(vlan, flags); 5572594e906SNikolay Aleksandrov if (ret) 5582594e906SNikolay Aleksandrov kfree(vlan); 559243a2e63SVlad Yasevich 5602594e906SNikolay Aleksandrov return ret; 561243a2e63SVlad Yasevich } 562243a2e63SVlad Yasevich 5638adff41cSToshiaki Makita /* Must be protected by RTNL. 5648adff41cSToshiaki Makita * Must be called with vid in range from 1 to 4094 inclusive. 5658adff41cSToshiaki Makita */ 566243a2e63SVlad Yasevich int br_vlan_delete(struct net_bridge *br, u16 vid) 567243a2e63SVlad Yasevich { 5682594e906SNikolay Aleksandrov struct net_bridge_vlan *v; 569243a2e63SVlad Yasevich 570243a2e63SVlad Yasevich ASSERT_RTNL(); 571243a2e63SVlad Yasevich 5722594e906SNikolay Aleksandrov v = br_vlan_find(br->vlgrp, vid); 5732594e906SNikolay Aleksandrov if (!v || !br_vlan_is_brentry(v)) 5742594e906SNikolay Aleksandrov return -ENOENT; 575243a2e63SVlad Yasevich 576424bb9c9SToshiaki Makita br_fdb_find_delete_local(br, NULL, br->dev->dev_addr, vid); 577bc9a25d2SVlad Yasevich 5782594e906SNikolay Aleksandrov return __vlan_del(v); 579243a2e63SVlad Yasevich } 580243a2e63SVlad Yasevich 581243a2e63SVlad Yasevich void br_vlan_flush(struct net_bridge *br) 582243a2e63SVlad Yasevich { 583243a2e63SVlad Yasevich ASSERT_RTNL(); 584243a2e63SVlad Yasevich 58577751ee8SNikolay Aleksandrov __vlan_flush(br_vlan_group(br)); 586243a2e63SVlad Yasevich } 587243a2e63SVlad Yasevich 5882594e906SNikolay Aleksandrov struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid) 5892b292fb4SToshiaki Makita { 5902594e906SNikolay Aleksandrov if (!vg) 5912594e906SNikolay Aleksandrov return NULL; 5922b292fb4SToshiaki Makita 5932594e906SNikolay Aleksandrov return br_vlan_lookup(&vg->vlan_hash, vid); 5942b292fb4SToshiaki Makita } 5952b292fb4SToshiaki Makita 596204177f3SToshiaki Makita /* Must be protected by RTNL. */ 597204177f3SToshiaki Makita static void recalculate_group_addr(struct net_bridge *br) 598204177f3SToshiaki Makita { 599204177f3SToshiaki Makita if (br->group_addr_set) 600204177f3SToshiaki Makita return; 601204177f3SToshiaki Makita 602204177f3SToshiaki Makita spin_lock_bh(&br->lock); 603204177f3SToshiaki Makita if (!br->vlan_enabled || br->vlan_proto == htons(ETH_P_8021Q)) { 604204177f3SToshiaki Makita /* Bridge Group Address */ 605204177f3SToshiaki Makita br->group_addr[5] = 0x00; 606204177f3SToshiaki Makita } else { /* vlan_enabled && ETH_P_8021AD */ 607204177f3SToshiaki Makita /* Provider Bridge Group Address */ 608204177f3SToshiaki Makita br->group_addr[5] = 0x08; 609204177f3SToshiaki Makita } 610204177f3SToshiaki Makita spin_unlock_bh(&br->lock); 611204177f3SToshiaki Makita } 612204177f3SToshiaki Makita 613204177f3SToshiaki Makita /* Must be protected by RTNL. */ 614204177f3SToshiaki Makita void br_recalculate_fwd_mask(struct net_bridge *br) 615204177f3SToshiaki Makita { 616204177f3SToshiaki Makita if (!br->vlan_enabled || br->vlan_proto == htons(ETH_P_8021Q)) 617204177f3SToshiaki Makita br->group_fwd_mask_required = BR_GROUPFWD_DEFAULT; 618204177f3SToshiaki Makita else /* vlan_enabled && ETH_P_8021AD */ 619204177f3SToshiaki Makita br->group_fwd_mask_required = BR_GROUPFWD_8021AD & 620204177f3SToshiaki Makita ~(1u << br->group_addr[5]); 621204177f3SToshiaki Makita } 622204177f3SToshiaki Makita 623a7854037SNikolay Aleksandrov int __br_vlan_filter_toggle(struct net_bridge *br, unsigned long val) 624243a2e63SVlad Yasevich { 625243a2e63SVlad Yasevich if (br->vlan_enabled == val) 626a7854037SNikolay Aleksandrov return 0; 627243a2e63SVlad Yasevich 628243a2e63SVlad Yasevich br->vlan_enabled = val; 6292796d0c6SVlad Yasevich br_manage_promisc(br); 630204177f3SToshiaki Makita recalculate_group_addr(br); 631204177f3SToshiaki Makita br_recalculate_fwd_mask(br); 632243a2e63SVlad Yasevich 633a7854037SNikolay Aleksandrov return 0; 634a7854037SNikolay Aleksandrov } 635a7854037SNikolay Aleksandrov 636a7854037SNikolay Aleksandrov int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val) 637a7854037SNikolay Aleksandrov { 638a7854037SNikolay Aleksandrov if (!rtnl_trylock()) 639a7854037SNikolay Aleksandrov return restart_syscall(); 640a7854037SNikolay Aleksandrov 641a7854037SNikolay Aleksandrov __br_vlan_filter_toggle(br, val); 642243a2e63SVlad Yasevich rtnl_unlock(); 643a7854037SNikolay Aleksandrov 644243a2e63SVlad Yasevich return 0; 645243a2e63SVlad Yasevich } 646243a2e63SVlad Yasevich 647d2d427b3SToshiaki Makita int __br_vlan_set_proto(struct net_bridge *br, __be16 proto) 648204177f3SToshiaki Makita { 649204177f3SToshiaki Makita int err = 0; 650204177f3SToshiaki Makita struct net_bridge_port *p; 6512594e906SNikolay Aleksandrov struct net_bridge_vlan *vlan; 652d2d427b3SToshiaki Makita __be16 oldproto; 653204177f3SToshiaki Makita 654204177f3SToshiaki Makita if (br->vlan_proto == proto) 655d2d427b3SToshiaki Makita return 0; 656204177f3SToshiaki Makita 657204177f3SToshiaki Makita /* Add VLANs for the new proto to the device filter. */ 658204177f3SToshiaki Makita list_for_each_entry(p, &br->port_list, list) { 6592594e906SNikolay Aleksandrov list_for_each_entry(vlan, &p->vlgrp->vlan_list, vlist) { 6602594e906SNikolay Aleksandrov err = vlan_vid_add(p->dev, proto, vlan->vid); 661204177f3SToshiaki Makita if (err) 662204177f3SToshiaki Makita goto err_filt; 663204177f3SToshiaki Makita } 664204177f3SToshiaki Makita } 665204177f3SToshiaki Makita 666204177f3SToshiaki Makita oldproto = br->vlan_proto; 667204177f3SToshiaki Makita br->vlan_proto = proto; 668204177f3SToshiaki Makita 669204177f3SToshiaki Makita recalculate_group_addr(br); 670204177f3SToshiaki Makita br_recalculate_fwd_mask(br); 671204177f3SToshiaki Makita 672204177f3SToshiaki Makita /* Delete VLANs for the old proto from the device filter. */ 6732594e906SNikolay Aleksandrov list_for_each_entry(p, &br->port_list, list) 6742594e906SNikolay Aleksandrov list_for_each_entry(vlan, &p->vlgrp->vlan_list, vlist) 6752594e906SNikolay Aleksandrov vlan_vid_del(p->dev, oldproto, vlan->vid); 676204177f3SToshiaki Makita 677d2d427b3SToshiaki Makita return 0; 678204177f3SToshiaki Makita 679204177f3SToshiaki Makita err_filt: 6802594e906SNikolay Aleksandrov list_for_each_entry_continue_reverse(vlan, &p->vlgrp->vlan_list, vlist) 6812594e906SNikolay Aleksandrov vlan_vid_del(p->dev, proto, vlan->vid); 682204177f3SToshiaki Makita 6832594e906SNikolay Aleksandrov list_for_each_entry_continue_reverse(p, &br->port_list, list) 6842594e906SNikolay Aleksandrov list_for_each_entry(vlan, &p->vlgrp->vlan_list, vlist) 6852594e906SNikolay Aleksandrov vlan_vid_del(p->dev, proto, vlan->vid); 686204177f3SToshiaki Makita 687d2d427b3SToshiaki Makita return err; 688d2d427b3SToshiaki Makita } 689d2d427b3SToshiaki Makita 690d2d427b3SToshiaki Makita int br_vlan_set_proto(struct net_bridge *br, unsigned long val) 691d2d427b3SToshiaki Makita { 692d2d427b3SToshiaki Makita int err; 693d2d427b3SToshiaki Makita 694d2d427b3SToshiaki Makita if (val != ETH_P_8021Q && val != ETH_P_8021AD) 695d2d427b3SToshiaki Makita return -EPROTONOSUPPORT; 696d2d427b3SToshiaki Makita 697d2d427b3SToshiaki Makita if (!rtnl_trylock()) 698d2d427b3SToshiaki Makita return restart_syscall(); 699d2d427b3SToshiaki Makita 700d2d427b3SToshiaki Makita err = __br_vlan_set_proto(br, htons(val)); 701d2d427b3SToshiaki Makita rtnl_unlock(); 702d2d427b3SToshiaki Makita 703d2d427b3SToshiaki Makita return err; 704204177f3SToshiaki Makita } 705204177f3SToshiaki Makita 70677751ee8SNikolay Aleksandrov static bool vlan_default_pvid(struct net_bridge_vlan_group *vg, u16 vid) 7075be5a2dfSVlad Yasevich { 7082594e906SNikolay Aleksandrov struct net_bridge_vlan *v; 7092594e906SNikolay Aleksandrov 71077751ee8SNikolay Aleksandrov if (vid != vg->pvid) 7112594e906SNikolay Aleksandrov return false; 7122594e906SNikolay Aleksandrov 7132594e906SNikolay Aleksandrov v = br_vlan_lookup(&vg->vlan_hash, vid); 7142594e906SNikolay Aleksandrov if (v && br_vlan_should_use(v) && 7152594e906SNikolay Aleksandrov (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)) 7162594e906SNikolay Aleksandrov return true; 7172594e906SNikolay Aleksandrov 7182594e906SNikolay Aleksandrov return false; 7195be5a2dfSVlad Yasevich } 7205be5a2dfSVlad Yasevich 7215be5a2dfSVlad Yasevich static void br_vlan_disable_default_pvid(struct net_bridge *br) 7225be5a2dfSVlad Yasevich { 7235be5a2dfSVlad Yasevich struct net_bridge_port *p; 7245be5a2dfSVlad Yasevich u16 pvid = br->default_pvid; 7255be5a2dfSVlad Yasevich 7265be5a2dfSVlad Yasevich /* Disable default_pvid on all ports where it is still 7275be5a2dfSVlad Yasevich * configured. 7285be5a2dfSVlad Yasevich */ 72977751ee8SNikolay Aleksandrov if (vlan_default_pvid(br->vlgrp, pvid)) 7305be5a2dfSVlad Yasevich br_vlan_delete(br, pvid); 7315be5a2dfSVlad Yasevich 7325be5a2dfSVlad Yasevich list_for_each_entry(p, &br->port_list, list) { 73377751ee8SNikolay Aleksandrov if (vlan_default_pvid(p->vlgrp, pvid)) 7345be5a2dfSVlad Yasevich nbp_vlan_delete(p, pvid); 7355be5a2dfSVlad Yasevich } 7365be5a2dfSVlad Yasevich 7375be5a2dfSVlad Yasevich br->default_pvid = 0; 7385be5a2dfSVlad Yasevich } 7395be5a2dfSVlad Yasevich 7405be5a2dfSVlad Yasevich static int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid) 7415be5a2dfSVlad Yasevich { 7422594e906SNikolay Aleksandrov const struct net_bridge_vlan *pvent; 7435be5a2dfSVlad Yasevich struct net_bridge_port *p; 7445be5a2dfSVlad Yasevich u16 old_pvid; 7455be5a2dfSVlad Yasevich int err = 0; 7465be5a2dfSVlad Yasevich unsigned long *changed; 7475be5a2dfSVlad Yasevich 7485be5a2dfSVlad Yasevich changed = kcalloc(BITS_TO_LONGS(BR_MAX_PORTS), sizeof(unsigned long), 7495be5a2dfSVlad Yasevich GFP_KERNEL); 7505be5a2dfSVlad Yasevich if (!changed) 7515be5a2dfSVlad Yasevich return -ENOMEM; 7525be5a2dfSVlad Yasevich 7535be5a2dfSVlad Yasevich old_pvid = br->default_pvid; 7545be5a2dfSVlad Yasevich 7555be5a2dfSVlad Yasevich /* Update default_pvid config only if we do not conflict with 7565be5a2dfSVlad Yasevich * user configuration. 7575be5a2dfSVlad Yasevich */ 7582594e906SNikolay Aleksandrov pvent = br_vlan_find(br->vlgrp, pvid); 75977751ee8SNikolay Aleksandrov if ((!old_pvid || vlan_default_pvid(br->vlgrp, old_pvid)) && 7602594e906SNikolay Aleksandrov (!pvent || !br_vlan_should_use(pvent))) { 7615be5a2dfSVlad Yasevich err = br_vlan_add(br, pvid, 7625be5a2dfSVlad Yasevich BRIDGE_VLAN_INFO_PVID | 7632594e906SNikolay Aleksandrov BRIDGE_VLAN_INFO_UNTAGGED | 7642594e906SNikolay Aleksandrov BRIDGE_VLAN_INFO_BRENTRY); 7655be5a2dfSVlad Yasevich if (err) 7665be5a2dfSVlad Yasevich goto out; 7675be5a2dfSVlad Yasevich br_vlan_delete(br, old_pvid); 7685be5a2dfSVlad Yasevich set_bit(0, changed); 7695be5a2dfSVlad Yasevich } 7705be5a2dfSVlad Yasevich 7715be5a2dfSVlad Yasevich list_for_each_entry(p, &br->port_list, list) { 7725be5a2dfSVlad Yasevich /* Update default_pvid config only if we do not conflict with 7735be5a2dfSVlad Yasevich * user configuration. 7745be5a2dfSVlad Yasevich */ 7755be5a2dfSVlad Yasevich if ((old_pvid && 77677751ee8SNikolay Aleksandrov !vlan_default_pvid(p->vlgrp, old_pvid)) || 7772594e906SNikolay Aleksandrov br_vlan_find(p->vlgrp, pvid)) 7785be5a2dfSVlad Yasevich continue; 7795be5a2dfSVlad Yasevich 7805be5a2dfSVlad Yasevich err = nbp_vlan_add(p, pvid, 7815be5a2dfSVlad Yasevich BRIDGE_VLAN_INFO_PVID | 7825be5a2dfSVlad Yasevich BRIDGE_VLAN_INFO_UNTAGGED); 7835be5a2dfSVlad Yasevich if (err) 7845be5a2dfSVlad Yasevich goto err_port; 7855be5a2dfSVlad Yasevich nbp_vlan_delete(p, old_pvid); 7865be5a2dfSVlad Yasevich set_bit(p->port_no, changed); 7875be5a2dfSVlad Yasevich } 7885be5a2dfSVlad Yasevich 7895be5a2dfSVlad Yasevich br->default_pvid = pvid; 7905be5a2dfSVlad Yasevich 7915be5a2dfSVlad Yasevich out: 7925be5a2dfSVlad Yasevich kfree(changed); 7935be5a2dfSVlad Yasevich return err; 7945be5a2dfSVlad Yasevich 7955be5a2dfSVlad Yasevich err_port: 7965be5a2dfSVlad Yasevich list_for_each_entry_continue_reverse(p, &br->port_list, list) { 7975be5a2dfSVlad Yasevich if (!test_bit(p->port_no, changed)) 7985be5a2dfSVlad Yasevich continue; 7995be5a2dfSVlad Yasevich 8005be5a2dfSVlad Yasevich if (old_pvid) 8015be5a2dfSVlad Yasevich nbp_vlan_add(p, old_pvid, 8025be5a2dfSVlad Yasevich BRIDGE_VLAN_INFO_PVID | 8035be5a2dfSVlad Yasevich BRIDGE_VLAN_INFO_UNTAGGED); 8045be5a2dfSVlad Yasevich nbp_vlan_delete(p, pvid); 8055be5a2dfSVlad Yasevich } 8065be5a2dfSVlad Yasevich 8075be5a2dfSVlad Yasevich if (test_bit(0, changed)) { 8085be5a2dfSVlad Yasevich if (old_pvid) 8095be5a2dfSVlad Yasevich br_vlan_add(br, old_pvid, 8105be5a2dfSVlad Yasevich BRIDGE_VLAN_INFO_PVID | 8112594e906SNikolay Aleksandrov BRIDGE_VLAN_INFO_UNTAGGED | 8122594e906SNikolay Aleksandrov BRIDGE_VLAN_INFO_BRENTRY); 8135be5a2dfSVlad Yasevich br_vlan_delete(br, pvid); 8145be5a2dfSVlad Yasevich } 8155be5a2dfSVlad Yasevich goto out; 8165be5a2dfSVlad Yasevich } 8175be5a2dfSVlad Yasevich 81896a20d9dSVlad Yasevich int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val) 81996a20d9dSVlad Yasevich { 82096a20d9dSVlad Yasevich u16 pvid = val; 82196a20d9dSVlad Yasevich int err = 0; 82296a20d9dSVlad Yasevich 8235be5a2dfSVlad Yasevich if (val >= VLAN_VID_MASK) 82496a20d9dSVlad Yasevich return -EINVAL; 82596a20d9dSVlad Yasevich 82696a20d9dSVlad Yasevich if (!rtnl_trylock()) 82796a20d9dSVlad Yasevich return restart_syscall(); 82896a20d9dSVlad Yasevich 82996a20d9dSVlad Yasevich if (pvid == br->default_pvid) 83096a20d9dSVlad Yasevich goto unlock; 83196a20d9dSVlad Yasevich 83296a20d9dSVlad Yasevich /* Only allow default pvid change when filtering is disabled */ 83396a20d9dSVlad Yasevich if (br->vlan_enabled) { 83496a20d9dSVlad Yasevich pr_info_once("Please disable vlan filtering to change default_pvid\n"); 83596a20d9dSVlad Yasevich err = -EPERM; 83696a20d9dSVlad Yasevich goto unlock; 83796a20d9dSVlad Yasevich } 83896a20d9dSVlad Yasevich 8395be5a2dfSVlad Yasevich if (!pvid) 8405be5a2dfSVlad Yasevich br_vlan_disable_default_pvid(br); 8415be5a2dfSVlad Yasevich else 8425be5a2dfSVlad Yasevich err = __br_vlan_set_default_pvid(br, pvid); 84396a20d9dSVlad Yasevich 84496a20d9dSVlad Yasevich unlock: 84596a20d9dSVlad Yasevich rtnl_unlock(); 84696a20d9dSVlad Yasevich return err; 84796a20d9dSVlad Yasevich } 84896a20d9dSVlad Yasevich 8495be5a2dfSVlad Yasevich int br_vlan_init(struct net_bridge *br) 8508580e211SToshiaki Makita { 8512594e906SNikolay Aleksandrov int ret = -ENOMEM; 8522594e906SNikolay Aleksandrov 8532594e906SNikolay Aleksandrov br->vlgrp = kzalloc(sizeof(struct net_bridge_vlan_group), GFP_KERNEL); 8542594e906SNikolay Aleksandrov if (!br->vlgrp) 8552594e906SNikolay Aleksandrov goto out; 8562594e906SNikolay Aleksandrov ret = rhashtable_init(&br->vlgrp->vlan_hash, &br_vlan_rht_params); 8572594e906SNikolay Aleksandrov if (ret) 8582594e906SNikolay Aleksandrov goto err_rhtbl; 8592594e906SNikolay Aleksandrov INIT_LIST_HEAD(&br->vlgrp->vlan_list); 8608580e211SToshiaki Makita br->vlan_proto = htons(ETH_P_8021Q); 86196a20d9dSVlad Yasevich br->default_pvid = 1; 8622594e906SNikolay Aleksandrov ret = br_vlan_add(br, 1, 8632594e906SNikolay Aleksandrov BRIDGE_VLAN_INFO_PVID | BRIDGE_VLAN_INFO_UNTAGGED | 8642594e906SNikolay Aleksandrov BRIDGE_VLAN_INFO_BRENTRY); 8652594e906SNikolay Aleksandrov if (ret) 8662594e906SNikolay Aleksandrov goto err_vlan_add; 8672594e906SNikolay Aleksandrov 8682594e906SNikolay Aleksandrov out: 8692594e906SNikolay Aleksandrov return ret; 8702594e906SNikolay Aleksandrov 8712594e906SNikolay Aleksandrov err_vlan_add: 8722594e906SNikolay Aleksandrov rhashtable_destroy(&br->vlgrp->vlan_hash); 8732594e906SNikolay Aleksandrov err_rhtbl: 8742594e906SNikolay Aleksandrov kfree(br->vlgrp); 8752594e906SNikolay Aleksandrov 8762594e906SNikolay Aleksandrov goto out; 8772594e906SNikolay Aleksandrov } 8782594e906SNikolay Aleksandrov 8792594e906SNikolay Aleksandrov int nbp_vlan_init(struct net_bridge_port *p) 8802594e906SNikolay Aleksandrov { 881263344e6SNikolay Aleksandrov struct net_bridge_vlan_group *vg; 8822594e906SNikolay Aleksandrov int ret = -ENOMEM; 8832594e906SNikolay Aleksandrov 884263344e6SNikolay Aleksandrov vg = kzalloc(sizeof(struct net_bridge_vlan_group), GFP_KERNEL); 885263344e6SNikolay Aleksandrov if (!vg) 8862594e906SNikolay Aleksandrov goto out; 8872594e906SNikolay Aleksandrov 888263344e6SNikolay Aleksandrov ret = rhashtable_init(&vg->vlan_hash, &br_vlan_rht_params); 8892594e906SNikolay Aleksandrov if (ret) 8902594e906SNikolay Aleksandrov goto err_rhtbl; 891263344e6SNikolay Aleksandrov INIT_LIST_HEAD(&vg->vlan_list); 892263344e6SNikolay Aleksandrov /* Make sure everything's committed before publishing vg */ 893263344e6SNikolay Aleksandrov smp_wmb(); 894263344e6SNikolay Aleksandrov p->vlgrp = vg; 8952594e906SNikolay Aleksandrov if (p->br->default_pvid) { 8962594e906SNikolay Aleksandrov ret = nbp_vlan_add(p, p->br->default_pvid, 8972594e906SNikolay Aleksandrov BRIDGE_VLAN_INFO_PVID | 8982594e906SNikolay Aleksandrov BRIDGE_VLAN_INFO_UNTAGGED); 8992594e906SNikolay Aleksandrov if (ret) 9002594e906SNikolay Aleksandrov goto err_vlan_add; 9012594e906SNikolay Aleksandrov } 9022594e906SNikolay Aleksandrov out: 9032594e906SNikolay Aleksandrov return ret; 9042594e906SNikolay Aleksandrov 9052594e906SNikolay Aleksandrov err_vlan_add: 906263344e6SNikolay Aleksandrov rhashtable_destroy(&vg->vlan_hash); 9072594e906SNikolay Aleksandrov err_rhtbl: 908263344e6SNikolay Aleksandrov kfree(vg); 9092594e906SNikolay Aleksandrov 9102594e906SNikolay Aleksandrov goto out; 9118580e211SToshiaki Makita } 9128580e211SToshiaki Makita 9138adff41cSToshiaki Makita /* Must be protected by RTNL. 9148adff41cSToshiaki Makita * Must be called with vid in range from 1 to 4094 inclusive. 9158adff41cSToshiaki Makita */ 916552406c4SVlad Yasevich int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags) 917243a2e63SVlad Yasevich { 9182594e906SNikolay Aleksandrov struct net_bridge_vlan *vlan; 9192594e906SNikolay Aleksandrov int ret; 920243a2e63SVlad Yasevich 921243a2e63SVlad Yasevich ASSERT_RTNL(); 922243a2e63SVlad Yasevich 9232594e906SNikolay Aleksandrov vlan = br_vlan_find(port->vlgrp, vid); 9242594e906SNikolay Aleksandrov if (vlan) { 9252594e906SNikolay Aleksandrov __vlan_add_flags(vlan, flags); 9262594e906SNikolay Aleksandrov return 0; 927243a2e63SVlad Yasevich } 928243a2e63SVlad Yasevich 9292594e906SNikolay Aleksandrov vlan = kzalloc(sizeof(*vlan), GFP_KERNEL); 9302594e906SNikolay Aleksandrov if (!vlan) 9312594e906SNikolay Aleksandrov return -ENOMEM; 932243a2e63SVlad Yasevich 9332594e906SNikolay Aleksandrov vlan->vid = vid; 9342594e906SNikolay Aleksandrov vlan->port = port; 9352594e906SNikolay Aleksandrov ret = __vlan_add(vlan, flags); 9362594e906SNikolay Aleksandrov if (ret) 9372594e906SNikolay Aleksandrov kfree(vlan); 938243a2e63SVlad Yasevich 9392594e906SNikolay Aleksandrov return ret; 940243a2e63SVlad Yasevich } 941243a2e63SVlad Yasevich 9428adff41cSToshiaki Makita /* Must be protected by RTNL. 9438adff41cSToshiaki Makita * Must be called with vid in range from 1 to 4094 inclusive. 9448adff41cSToshiaki Makita */ 945243a2e63SVlad Yasevich int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) 946243a2e63SVlad Yasevich { 9472594e906SNikolay Aleksandrov struct net_bridge_vlan *v; 948243a2e63SVlad Yasevich 949243a2e63SVlad Yasevich ASSERT_RTNL(); 950243a2e63SVlad Yasevich 9512594e906SNikolay Aleksandrov v = br_vlan_find(port->vlgrp, vid); 9522594e906SNikolay Aleksandrov if (!v) 9532594e906SNikolay Aleksandrov return -ENOENT; 954424bb9c9SToshiaki Makita br_fdb_find_delete_local(port->br, port, port->dev->dev_addr, vid); 9551ea2d020SNikolay Aleksandrov br_fdb_delete_by_port(port->br, port, vid, 0); 956bc9a25d2SVlad Yasevich 9572594e906SNikolay Aleksandrov return __vlan_del(v); 958243a2e63SVlad Yasevich } 959243a2e63SVlad Yasevich 960243a2e63SVlad Yasevich void nbp_vlan_flush(struct net_bridge_port *port) 961243a2e63SVlad Yasevich { 9622594e906SNikolay Aleksandrov struct net_bridge_vlan *vlan; 963243a2e63SVlad Yasevich 964243a2e63SVlad Yasevich ASSERT_RTNL(); 965243a2e63SVlad Yasevich 9662594e906SNikolay Aleksandrov list_for_each_entry(vlan, &port->vlgrp->vlan_list, vlist) 9672594e906SNikolay Aleksandrov vlan_vid_del(port->dev, port->br->vlan_proto, vlan->vid); 968243a2e63SVlad Yasevich 96977751ee8SNikolay Aleksandrov __vlan_flush(nbp_vlan_group(port)); 9705be5a2dfSVlad Yasevich } 971