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)) 57907b1e6eSNikolay Aleksandrov vg = br_vlan_group(v->br); 58635126b7SVlad Yasevich else 59907b1e6eSNikolay Aleksandrov vg = nbp_vlan_group(v->port); 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 { 758f24f309SJiri Pirko struct switchdev_obj_port_vlan v = { 769e8f4a54SJiri Pirko .obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN, 777f109539SScott Feldman .flags = flags, 783e3a78b4SScott Feldman .vid_begin = vid, 797f109539SScott Feldman .vid_end = vid, 807f109539SScott Feldman }; 810944d6b5SJiri Pirko int err; 827f109539SScott Feldman 830944d6b5SJiri Pirko /* Try switchdev op first. In case it is not supported, fallback to 840944d6b5SJiri Pirko * 8021q add. 850944d6b5SJiri Pirko */ 869e8f4a54SJiri Pirko err = switchdev_port_obj_add(dev, &v.obj); 877f109539SScott Feldman if (err == -EOPNOTSUPP) 880944d6b5SJiri Pirko return vlan_vid_add(dev, br->vlan_proto, vid); 897f109539SScott Feldman return err; 907f109539SScott Feldman } 917f109539SScott Feldman 922594e906SNikolay Aleksandrov static void __vlan_add_list(struct net_bridge_vlan *v) 93243a2e63SVlad Yasevich { 94907b1e6eSNikolay Aleksandrov struct net_bridge_vlan_group *vg; 952594e906SNikolay Aleksandrov struct list_head *headp, *hpos; 962594e906SNikolay Aleksandrov struct net_bridge_vlan *vent; 97243a2e63SVlad Yasevich 98907b1e6eSNikolay Aleksandrov if (br_vlan_is_master(v)) 99907b1e6eSNikolay Aleksandrov vg = br_vlan_group(v->br); 100907b1e6eSNikolay Aleksandrov else 101907b1e6eSNikolay Aleksandrov vg = nbp_vlan_group(v->port); 102907b1e6eSNikolay Aleksandrov 103907b1e6eSNikolay Aleksandrov headp = &vg->vlan_list; 1042594e906SNikolay Aleksandrov list_for_each_prev(hpos, headp) { 1052594e906SNikolay Aleksandrov vent = list_entry(hpos, struct net_bridge_vlan, vlist); 1062594e906SNikolay Aleksandrov if (v->vid < vent->vid) 1072594e906SNikolay Aleksandrov continue; 1082594e906SNikolay Aleksandrov else 1092594e906SNikolay Aleksandrov break; 1102594e906SNikolay Aleksandrov } 111586c2b57SNikolay Aleksandrov list_add_rcu(&v->vlist, hpos); 112552406c4SVlad Yasevich } 113243a2e63SVlad Yasevich 1142594e906SNikolay Aleksandrov static void __vlan_del_list(struct net_bridge_vlan *v) 1152594e906SNikolay Aleksandrov { 116586c2b57SNikolay Aleksandrov list_del_rcu(&v->vlist); 117243a2e63SVlad Yasevich } 118243a2e63SVlad Yasevich 119bf361ad3SVivien Didelot static int __vlan_vid_del(struct net_device *dev, struct net_bridge *br, 1207f109539SScott Feldman u16 vid) 1217f109539SScott Feldman { 1228f24f309SJiri Pirko struct switchdev_obj_port_vlan v = { 1239e8f4a54SJiri Pirko .obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN, 1243e3a78b4SScott Feldman .vid_begin = vid, 1257f109539SScott Feldman .vid_end = vid, 1267f109539SScott Feldman }; 1270944d6b5SJiri Pirko int err; 1287f109539SScott Feldman 1290944d6b5SJiri Pirko /* Try switchdev op first. In case it is not supported, fallback to 1300944d6b5SJiri Pirko * 8021q del. 1310944d6b5SJiri Pirko */ 1329e8f4a54SJiri Pirko err = switchdev_port_obj_del(dev, &v.obj); 1330944d6b5SJiri Pirko if (err == -EOPNOTSUPP) { 1340944d6b5SJiri Pirko vlan_vid_del(dev, br->vlan_proto, vid); 1350944d6b5SJiri Pirko return 0; 1367f109539SScott Feldman } 137bf361ad3SVivien Didelot return err; 1387f109539SScott Feldman } 1397f109539SScott Feldman 140f8ed289fSNikolay Aleksandrov /* Returns a master vlan, if it didn't exist it gets created. In all cases a 141f8ed289fSNikolay Aleksandrov * a reference is taken to the master vlan before returning. 142f8ed289fSNikolay Aleksandrov */ 143f8ed289fSNikolay Aleksandrov static struct net_bridge_vlan *br_vlan_get_master(struct net_bridge *br, u16 vid) 144f8ed289fSNikolay Aleksandrov { 145907b1e6eSNikolay Aleksandrov struct net_bridge_vlan_group *vg; 146f8ed289fSNikolay Aleksandrov struct net_bridge_vlan *masterv; 147f8ed289fSNikolay Aleksandrov 148907b1e6eSNikolay Aleksandrov vg = br_vlan_group(br); 149907b1e6eSNikolay Aleksandrov masterv = br_vlan_find(vg, vid); 150f8ed289fSNikolay Aleksandrov if (!masterv) { 151f8ed289fSNikolay Aleksandrov /* missing global ctx, create it now */ 152f8ed289fSNikolay Aleksandrov if (br_vlan_add(br, vid, 0)) 153f8ed289fSNikolay Aleksandrov return NULL; 154907b1e6eSNikolay Aleksandrov masterv = br_vlan_find(vg, vid); 155f8ed289fSNikolay Aleksandrov if (WARN_ON(!masterv)) 156f8ed289fSNikolay Aleksandrov return NULL; 157f8ed289fSNikolay Aleksandrov } 158f8ed289fSNikolay Aleksandrov atomic_inc(&masterv->refcnt); 159f8ed289fSNikolay Aleksandrov 160f8ed289fSNikolay Aleksandrov return masterv; 161f8ed289fSNikolay Aleksandrov } 162f8ed289fSNikolay Aleksandrov 163f8ed289fSNikolay Aleksandrov static void br_vlan_put_master(struct net_bridge_vlan *masterv) 164f8ed289fSNikolay Aleksandrov { 165907b1e6eSNikolay Aleksandrov struct net_bridge_vlan_group *vg; 166907b1e6eSNikolay Aleksandrov 167f8ed289fSNikolay Aleksandrov if (!br_vlan_is_master(masterv)) 168f8ed289fSNikolay Aleksandrov return; 169f8ed289fSNikolay Aleksandrov 170907b1e6eSNikolay Aleksandrov vg = br_vlan_group(masterv->br); 171f8ed289fSNikolay Aleksandrov if (atomic_dec_and_test(&masterv->refcnt)) { 172907b1e6eSNikolay Aleksandrov rhashtable_remove_fast(&vg->vlan_hash, 173f8ed289fSNikolay Aleksandrov &masterv->vnode, br_vlan_rht_params); 174f8ed289fSNikolay Aleksandrov __vlan_del_list(masterv); 175f8ed289fSNikolay Aleksandrov kfree_rcu(masterv, rcu); 176f8ed289fSNikolay Aleksandrov } 177f8ed289fSNikolay Aleksandrov } 178f8ed289fSNikolay Aleksandrov 1792594e906SNikolay Aleksandrov /* This is the shared VLAN add function which works for both ports and bridge 1802594e906SNikolay Aleksandrov * devices. There are four possible calls to this function in terms of the 1812594e906SNikolay Aleksandrov * vlan entry type: 1822594e906SNikolay Aleksandrov * 1. vlan is being added on a port (no master flags, global entry exists) 1832594e906SNikolay Aleksandrov * 2. vlan is being added on a bridge (both master and brvlan flags) 1842594e906SNikolay Aleksandrov * 3. vlan is being added on a port, but a global entry didn't exist which 1852594e906SNikolay Aleksandrov * is being created right now (master flag set, brvlan flag unset), the 1862594e906SNikolay Aleksandrov * global entry is used for global per-vlan features, but not for filtering 1872594e906SNikolay Aleksandrov * 4. same as 3 but with both master and brvlan flags set so the entry 1882594e906SNikolay Aleksandrov * will be used for filtering in both the port and the bridge 1892594e906SNikolay Aleksandrov */ 1902594e906SNikolay Aleksandrov static int __vlan_add(struct net_bridge_vlan *v, u16 flags) 191243a2e63SVlad Yasevich { 1922594e906SNikolay Aleksandrov struct net_bridge_vlan *masterv = NULL; 1932594e906SNikolay Aleksandrov struct net_bridge_port *p = NULL; 1946be144f6SNikolay Aleksandrov struct net_bridge_vlan_group *vg; 1952594e906SNikolay Aleksandrov struct net_device *dev; 1962594e906SNikolay Aleksandrov struct net_bridge *br; 197bf361ad3SVivien Didelot int err; 198bf361ad3SVivien Didelot 1992594e906SNikolay Aleksandrov if (br_vlan_is_master(v)) { 2002594e906SNikolay Aleksandrov br = v->br; 2012594e906SNikolay Aleksandrov dev = br->dev; 202907b1e6eSNikolay Aleksandrov vg = br_vlan_group(br); 2032594e906SNikolay Aleksandrov } else { 2042594e906SNikolay Aleksandrov p = v->port; 2052594e906SNikolay Aleksandrov br = p->br; 2062594e906SNikolay Aleksandrov dev = p->dev; 207907b1e6eSNikolay Aleksandrov vg = nbp_vlan_group(p); 2082594e906SNikolay Aleksandrov } 2092594e906SNikolay Aleksandrov 2102594e906SNikolay Aleksandrov if (p) { 2112594e906SNikolay Aleksandrov /* Add VLAN to the device filter if it is supported. 2122594e906SNikolay Aleksandrov * This ensures tagged traffic enters the bridge when 2132594e906SNikolay Aleksandrov * promiscuous mode is disabled by br_manage_promisc(). 2142594e906SNikolay Aleksandrov */ 2152594e906SNikolay Aleksandrov err = __vlan_vid_add(dev, br, v->vid, flags); 216bf361ad3SVivien Didelot if (err) 2172594e906SNikolay Aleksandrov goto out; 2182594e906SNikolay Aleksandrov 2192594e906SNikolay Aleksandrov /* need to work on the master vlan too */ 2202594e906SNikolay Aleksandrov if (flags & BRIDGE_VLAN_INFO_MASTER) { 2212ffdf508SNikolay Aleksandrov err = br_vlan_add(br, v->vid, flags | 2222ffdf508SNikolay Aleksandrov BRIDGE_VLAN_INFO_BRENTRY); 2232594e906SNikolay Aleksandrov if (err) 2242594e906SNikolay Aleksandrov goto out_filt; 2252594e906SNikolay Aleksandrov } 2262594e906SNikolay Aleksandrov 227f8ed289fSNikolay Aleksandrov masterv = br_vlan_get_master(br, v->vid); 228f8ed289fSNikolay Aleksandrov if (!masterv) 2292594e906SNikolay Aleksandrov goto out_filt; 2302594e906SNikolay Aleksandrov v->brvlan = masterv; 2312594e906SNikolay Aleksandrov } 2322594e906SNikolay Aleksandrov 2336be144f6SNikolay Aleksandrov /* Add the dev mac and count the vlan only if it's usable */ 2342594e906SNikolay Aleksandrov if (br_vlan_should_use(v)) { 2352594e906SNikolay Aleksandrov err = br_fdb_insert(br, p, dev->dev_addr, v->vid); 2362594e906SNikolay Aleksandrov if (err) { 2372594e906SNikolay Aleksandrov br_err(br, "failed insert local address into bridge forwarding table\n"); 2382594e906SNikolay Aleksandrov goto out_filt; 2392594e906SNikolay Aleksandrov } 2406be144f6SNikolay Aleksandrov vg->num_vlans++; 2412594e906SNikolay Aleksandrov } 2422594e906SNikolay Aleksandrov 2436be144f6SNikolay Aleksandrov err = rhashtable_lookup_insert_fast(&vg->vlan_hash, &v->vnode, 2446be144f6SNikolay Aleksandrov br_vlan_rht_params); 2452594e906SNikolay Aleksandrov if (err) 2462594e906SNikolay Aleksandrov goto out_fdb_insert; 2472594e906SNikolay Aleksandrov 2482594e906SNikolay Aleksandrov __vlan_add_list(v); 2492594e906SNikolay Aleksandrov __vlan_add_flags(v, flags); 2502594e906SNikolay Aleksandrov out: 2512594e906SNikolay Aleksandrov return err; 2522594e906SNikolay Aleksandrov 2532594e906SNikolay Aleksandrov out_fdb_insert: 2546be144f6SNikolay Aleksandrov if (br_vlan_should_use(v)) { 2556be144f6SNikolay Aleksandrov br_fdb_find_delete_local(br, p, dev->dev_addr, v->vid); 2566be144f6SNikolay Aleksandrov vg->num_vlans--; 2576be144f6SNikolay Aleksandrov } 2582594e906SNikolay Aleksandrov 2592594e906SNikolay Aleksandrov out_filt: 2602594e906SNikolay Aleksandrov if (p) { 2612594e906SNikolay Aleksandrov __vlan_vid_del(dev, br, v->vid); 2622594e906SNikolay Aleksandrov if (masterv) { 263f8ed289fSNikolay Aleksandrov br_vlan_put_master(masterv); 2642594e906SNikolay Aleksandrov v->brvlan = NULL; 2652594e906SNikolay Aleksandrov } 2662594e906SNikolay Aleksandrov } 2672594e906SNikolay Aleksandrov 2682594e906SNikolay Aleksandrov goto out; 2692594e906SNikolay Aleksandrov } 2702594e906SNikolay Aleksandrov 2712594e906SNikolay Aleksandrov static int __vlan_del(struct net_bridge_vlan *v) 2722594e906SNikolay Aleksandrov { 2732594e906SNikolay Aleksandrov struct net_bridge_vlan *masterv = v; 27477751ee8SNikolay Aleksandrov struct net_bridge_vlan_group *vg; 2752594e906SNikolay Aleksandrov struct net_bridge_port *p = NULL; 2762594e906SNikolay Aleksandrov int err = 0; 2772594e906SNikolay Aleksandrov 2782594e906SNikolay Aleksandrov if (br_vlan_is_master(v)) { 279907b1e6eSNikolay Aleksandrov vg = br_vlan_group(v->br); 2802594e906SNikolay Aleksandrov } else { 2812594e906SNikolay Aleksandrov p = v->port; 282907b1e6eSNikolay Aleksandrov vg = nbp_vlan_group(v->port); 2832594e906SNikolay Aleksandrov masterv = v->brvlan; 2842594e906SNikolay Aleksandrov } 2852594e906SNikolay Aleksandrov 28677751ee8SNikolay Aleksandrov __vlan_delete_pvid(vg, v->vid); 2872594e906SNikolay Aleksandrov if (p) { 2882594e906SNikolay Aleksandrov err = __vlan_vid_del(p->dev, p->br, v->vid); 2892594e906SNikolay Aleksandrov if (err) 2902594e906SNikolay Aleksandrov goto out; 2912594e906SNikolay Aleksandrov } 2922594e906SNikolay Aleksandrov 2936be144f6SNikolay Aleksandrov if (br_vlan_should_use(v)) { 2942594e906SNikolay Aleksandrov v->flags &= ~BRIDGE_VLAN_INFO_BRENTRY; 2956be144f6SNikolay Aleksandrov vg->num_vlans--; 2962594e906SNikolay Aleksandrov } 2972594e906SNikolay Aleksandrov 2982594e906SNikolay Aleksandrov if (masterv != v) { 29977751ee8SNikolay Aleksandrov rhashtable_remove_fast(&vg->vlan_hash, &v->vnode, 30077751ee8SNikolay Aleksandrov br_vlan_rht_params); 3012594e906SNikolay Aleksandrov __vlan_del_list(v); 3022594e906SNikolay Aleksandrov kfree_rcu(v, rcu); 3032594e906SNikolay Aleksandrov } 3042594e906SNikolay Aleksandrov 305f8ed289fSNikolay Aleksandrov br_vlan_put_master(masterv); 3062594e906SNikolay Aleksandrov out: 307bf361ad3SVivien Didelot return err; 3088580e211SToshiaki Makita } 309243a2e63SVlad Yasevich 310f409d0edSNikolay Aleksandrov static void __vlan_group_free(struct net_bridge_vlan_group *vg) 311f409d0edSNikolay Aleksandrov { 312f409d0edSNikolay Aleksandrov WARN_ON(!list_empty(&vg->vlan_list)); 313f409d0edSNikolay Aleksandrov rhashtable_destroy(&vg->vlan_hash); 314f409d0edSNikolay Aleksandrov kfree(vg); 315f409d0edSNikolay Aleksandrov } 316f409d0edSNikolay Aleksandrov 317f409d0edSNikolay Aleksandrov static void __vlan_flush(struct net_bridge_vlan_group *vg) 318243a2e63SVlad Yasevich { 3192594e906SNikolay Aleksandrov struct net_bridge_vlan *vlan, *tmp; 3202594e906SNikolay Aleksandrov 321f409d0edSNikolay Aleksandrov __vlan_delete_pvid(vg, vg->pvid); 322f409d0edSNikolay Aleksandrov list_for_each_entry_safe(vlan, tmp, &vg->vlan_list, vlist) 3232594e906SNikolay Aleksandrov __vlan_del(vlan); 324243a2e63SVlad Yasevich } 325243a2e63SVlad Yasevich 32678851988SVlad Yasevich struct sk_buff *br_handle_vlan(struct net_bridge *br, 3272594e906SNikolay Aleksandrov struct net_bridge_vlan_group *vg, 328a37b85c9SVlad Yasevich struct sk_buff *skb) 329a37b85c9SVlad Yasevich { 3302594e906SNikolay Aleksandrov struct net_bridge_vlan *v; 331a37b85c9SVlad Yasevich u16 vid; 332a37b85c9SVlad Yasevich 33320adfa1aSVlad Yasevich /* If this packet was not filtered at input, let it pass */ 33420adfa1aSVlad Yasevich if (!BR_INPUT_SKB_CB(skb)->vlan_filtered) 33578851988SVlad Yasevich goto out; 33678851988SVlad Yasevich 3372594e906SNikolay Aleksandrov /* At this point, we know that the frame was filtered and contains 3382594e906SNikolay Aleksandrov * a valid vlan id. If the vlan id has untagged flag set, 3392594e906SNikolay Aleksandrov * send untagged; otherwise, send tagged. 3402594e906SNikolay Aleksandrov */ 3412594e906SNikolay Aleksandrov br_vlan_get_tag(skb, &vid); 3422594e906SNikolay Aleksandrov v = br_vlan_find(vg, vid); 3432594e906SNikolay Aleksandrov /* Vlan entry must be configured at this point. The 344fc92f745SVlad Yasevich * only exception is the bridge is set in promisc mode and the 345fc92f745SVlad Yasevich * packet is destined for the bridge device. In this case 346fc92f745SVlad Yasevich * pass the packet as is. 347fc92f745SVlad Yasevich */ 3482594e906SNikolay Aleksandrov if (!v || !br_vlan_should_use(v)) { 349fc92f745SVlad Yasevich if ((br->dev->flags & IFF_PROMISC) && skb->dev == br->dev) { 350fc92f745SVlad Yasevich goto out; 351fc92f745SVlad Yasevich } else { 352fc92f745SVlad Yasevich kfree_skb(skb); 353fc92f745SVlad Yasevich return NULL; 354fc92f745SVlad Yasevich } 355fc92f745SVlad Yasevich } 3562594e906SNikolay Aleksandrov if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED) 35799b192daSToshiaki Makita skb->vlan_tci = 0; 35878851988SVlad Yasevich 35978851988SVlad Yasevich out: 36078851988SVlad Yasevich return skb; 36178851988SVlad Yasevich } 36278851988SVlad Yasevich 36378851988SVlad Yasevich /* Called under RCU */ 36477751ee8SNikolay Aleksandrov static bool __allowed_ingress(struct net_bridge_vlan_group *vg, __be16 proto, 36578851988SVlad Yasevich struct sk_buff *skb, u16 *vid) 36678851988SVlad Yasevich { 3672594e906SNikolay Aleksandrov const struct net_bridge_vlan *v; 3688580e211SToshiaki Makita bool tagged; 369a37b85c9SVlad Yasevich 37020adfa1aSVlad Yasevich BR_INPUT_SKB_CB(skb)->vlan_filtered = true; 37112464bb8SToshiaki Makita /* If vlan tx offload is disabled on bridge device and frame was 37212464bb8SToshiaki Makita * sent from vlan device on the bridge device, it does not have 37312464bb8SToshiaki Makita * HW accelerated vlan tag. 37412464bb8SToshiaki Makita */ 375df8a39deSJiri Pirko if (unlikely(!skb_vlan_tag_present(skb) && 3768580e211SToshiaki Makita skb->protocol == proto)) { 3770d5501c1SVlad Yasevich skb = skb_vlan_untag(skb); 37812464bb8SToshiaki Makita if (unlikely(!skb)) 37912464bb8SToshiaki Makita return false; 38012464bb8SToshiaki Makita } 38112464bb8SToshiaki Makita 3828580e211SToshiaki Makita if (!br_vlan_get_tag(skb, vid)) { 3838580e211SToshiaki Makita /* Tagged frame */ 3848580e211SToshiaki Makita if (skb->vlan_proto != proto) { 3858580e211SToshiaki Makita /* Protocol-mismatch, empty out vlan_tci for new tag */ 3868580e211SToshiaki Makita skb_push(skb, ETH_HLEN); 38762749e2cSJiri Pirko skb = vlan_insert_tag_set_proto(skb, skb->vlan_proto, 388df8a39deSJiri Pirko skb_vlan_tag_get(skb)); 3898580e211SToshiaki Makita if (unlikely(!skb)) 3908580e211SToshiaki Makita return false; 3918580e211SToshiaki Makita 3928580e211SToshiaki Makita skb_pull(skb, ETH_HLEN); 3938580e211SToshiaki Makita skb_reset_mac_len(skb); 3948580e211SToshiaki Makita *vid = 0; 3958580e211SToshiaki Makita tagged = false; 3968580e211SToshiaki Makita } else { 3978580e211SToshiaki Makita tagged = true; 3988580e211SToshiaki Makita } 3998580e211SToshiaki Makita } else { 4008580e211SToshiaki Makita /* Untagged frame */ 4018580e211SToshiaki Makita tagged = false; 4028580e211SToshiaki Makita } 4038580e211SToshiaki Makita 404b90356ceSToshiaki Makita if (!*vid) { 40577751ee8SNikolay Aleksandrov u16 pvid = br_get_pvid(vg); 40677751ee8SNikolay Aleksandrov 407b90356ceSToshiaki Makita /* Frame had a tag with VID 0 or did not have a tag. 408b90356ceSToshiaki Makita * See if pvid is set on this port. That tells us which 409b90356ceSToshiaki Makita * vlan untagged or priority-tagged traffic belongs to. 41078851988SVlad Yasevich */ 4113df6bf45SVlad Yasevich if (!pvid) 412eb707618SToshiaki Makita goto drop; 41378851988SVlad Yasevich 414b90356ceSToshiaki Makita /* PVID is set on this port. Any untagged or priority-tagged 415b90356ceSToshiaki Makita * ingress frame is considered to belong to this vlan. 41678851988SVlad Yasevich */ 417dfb5fa32SToshiaki Makita *vid = pvid; 4188580e211SToshiaki Makita if (likely(!tagged)) 419b90356ceSToshiaki Makita /* Untagged Frame. */ 4208580e211SToshiaki Makita __vlan_hwaccel_put_tag(skb, proto, pvid); 421b90356ceSToshiaki Makita else 422b90356ceSToshiaki Makita /* Priority-tagged Frame. 423b90356ceSToshiaki Makita * At this point, We know that skb->vlan_tci had 424b90356ceSToshiaki Makita * VLAN_TAG_PRESENT bit and its VID field was 0x000. 425b90356ceSToshiaki Makita * We update only VID field and preserve PCP field. 426b90356ceSToshiaki Makita */ 427b90356ceSToshiaki Makita skb->vlan_tci |= pvid; 428b90356ceSToshiaki Makita 42978851988SVlad Yasevich return true; 43078851988SVlad Yasevich } 43178851988SVlad Yasevich 43278851988SVlad Yasevich /* Frame had a valid vlan tag. See if vlan is allowed */ 43377751ee8SNikolay Aleksandrov v = br_vlan_find(vg, *vid); 4342594e906SNikolay Aleksandrov if (v && br_vlan_should_use(v)) 435a37b85c9SVlad Yasevich return true; 436eb707618SToshiaki Makita drop: 437eb707618SToshiaki Makita kfree_skb(skb); 438a37b85c9SVlad Yasevich return false; 439a37b85c9SVlad Yasevich } 440a37b85c9SVlad Yasevich 44177751ee8SNikolay Aleksandrov bool br_allowed_ingress(const struct net_bridge *br, 44277751ee8SNikolay Aleksandrov struct net_bridge_vlan_group *vg, struct sk_buff *skb, 4432594e906SNikolay Aleksandrov u16 *vid) 4442594e906SNikolay Aleksandrov { 4452594e906SNikolay Aleksandrov /* If VLAN filtering is disabled on the bridge, all packets are 4462594e906SNikolay Aleksandrov * permitted. 4472594e906SNikolay Aleksandrov */ 4482594e906SNikolay Aleksandrov if (!br->vlan_enabled) { 4492594e906SNikolay Aleksandrov BR_INPUT_SKB_CB(skb)->vlan_filtered = false; 4502594e906SNikolay Aleksandrov return true; 4512594e906SNikolay Aleksandrov } 4522594e906SNikolay Aleksandrov 45377751ee8SNikolay Aleksandrov return __allowed_ingress(vg, br->vlan_proto, skb, vid); 4542594e906SNikolay Aleksandrov } 4552594e906SNikolay Aleksandrov 45685f46c6bSVlad Yasevich /* Called under RCU. */ 4572594e906SNikolay Aleksandrov bool br_allowed_egress(struct net_bridge_vlan_group *vg, 45885f46c6bSVlad Yasevich const struct sk_buff *skb) 45985f46c6bSVlad Yasevich { 4602594e906SNikolay Aleksandrov const struct net_bridge_vlan *v; 46185f46c6bSVlad Yasevich u16 vid; 46285f46c6bSVlad Yasevich 46320adfa1aSVlad Yasevich /* If this packet was not filtered at input, let it pass */ 46420adfa1aSVlad Yasevich if (!BR_INPUT_SKB_CB(skb)->vlan_filtered) 46585f46c6bSVlad Yasevich return true; 46685f46c6bSVlad Yasevich 46785f46c6bSVlad Yasevich br_vlan_get_tag(skb, &vid); 4682594e906SNikolay Aleksandrov v = br_vlan_find(vg, vid); 4692594e906SNikolay Aleksandrov if (v && br_vlan_should_use(v)) 47085f46c6bSVlad Yasevich return true; 47185f46c6bSVlad Yasevich 47285f46c6bSVlad Yasevich return false; 47385f46c6bSVlad Yasevich } 47485f46c6bSVlad Yasevich 475e0d7968aSToshiaki Makita /* Called under RCU */ 476e0d7968aSToshiaki Makita bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid) 477e0d7968aSToshiaki Makita { 478468e7944SNikolay Aleksandrov struct net_bridge_vlan_group *vg; 479e0d7968aSToshiaki Makita struct net_bridge *br = p->br; 480e0d7968aSToshiaki Makita 48120adfa1aSVlad Yasevich /* If filtering was disabled at input, let it pass. */ 482c095f248SVlad Yasevich if (!br->vlan_enabled) 483e0d7968aSToshiaki Makita return true; 484e0d7968aSToshiaki Makita 485907b1e6eSNikolay Aleksandrov vg = nbp_vlan_group(p); 486468e7944SNikolay Aleksandrov if (!vg || !vg->num_vlans) 487e0d7968aSToshiaki Makita return false; 488e0d7968aSToshiaki Makita 4898580e211SToshiaki Makita if (!br_vlan_get_tag(skb, vid) && skb->vlan_proto != br->vlan_proto) 4908580e211SToshiaki Makita *vid = 0; 4918580e211SToshiaki Makita 492e0d7968aSToshiaki Makita if (!*vid) { 49377751ee8SNikolay Aleksandrov *vid = br_get_pvid(vg); 4943df6bf45SVlad Yasevich if (!*vid) 495e0d7968aSToshiaki Makita return false; 496e0d7968aSToshiaki Makita 497e0d7968aSToshiaki Makita return true; 498e0d7968aSToshiaki Makita } 499e0d7968aSToshiaki Makita 50077751ee8SNikolay Aleksandrov if (br_vlan_find(vg, *vid)) 501e0d7968aSToshiaki Makita return true; 502e0d7968aSToshiaki Makita 503e0d7968aSToshiaki Makita return false; 504e0d7968aSToshiaki Makita } 505e0d7968aSToshiaki Makita 5068adff41cSToshiaki Makita /* Must be protected by RTNL. 5078adff41cSToshiaki Makita * Must be called with vid in range from 1 to 4094 inclusive. 5088adff41cSToshiaki Makita */ 509552406c4SVlad Yasevich int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags) 510243a2e63SVlad Yasevich { 511907b1e6eSNikolay Aleksandrov struct net_bridge_vlan_group *vg; 5122594e906SNikolay Aleksandrov struct net_bridge_vlan *vlan; 5132594e906SNikolay Aleksandrov int ret; 514243a2e63SVlad Yasevich 515243a2e63SVlad Yasevich ASSERT_RTNL(); 516243a2e63SVlad Yasevich 517907b1e6eSNikolay Aleksandrov vg = br_vlan_group(br); 518907b1e6eSNikolay Aleksandrov vlan = br_vlan_find(vg, vid); 5192594e906SNikolay Aleksandrov if (vlan) { 5202594e906SNikolay Aleksandrov if (!br_vlan_is_brentry(vlan)) { 5212594e906SNikolay Aleksandrov /* Trying to change flags of non-existent bridge vlan */ 5222594e906SNikolay Aleksandrov if (!(flags & BRIDGE_VLAN_INFO_BRENTRY)) 5232594e906SNikolay Aleksandrov return -EINVAL; 5242594e906SNikolay Aleksandrov /* It was only kept for port vlans, now make it real */ 5252594e906SNikolay Aleksandrov ret = br_fdb_insert(br, NULL, br->dev->dev_addr, 5262594e906SNikolay Aleksandrov vlan->vid); 5272594e906SNikolay Aleksandrov if (ret) { 5282594e906SNikolay Aleksandrov br_err(br, "failed insert local address into bridge forwarding table\n"); 5292594e906SNikolay Aleksandrov return ret; 5302594e906SNikolay Aleksandrov } 5312594e906SNikolay Aleksandrov atomic_inc(&vlan->refcnt); 5322594e906SNikolay Aleksandrov vlan->flags |= BRIDGE_VLAN_INFO_BRENTRY; 533907b1e6eSNikolay Aleksandrov vg->num_vlans++; 5342594e906SNikolay Aleksandrov } 5352594e906SNikolay Aleksandrov __vlan_add_flags(vlan, flags); 5362594e906SNikolay Aleksandrov return 0; 5372594e906SNikolay Aleksandrov } 538243a2e63SVlad Yasevich 5392594e906SNikolay Aleksandrov vlan = kzalloc(sizeof(*vlan), GFP_KERNEL); 5402594e906SNikolay Aleksandrov if (!vlan) 541243a2e63SVlad Yasevich return -ENOMEM; 542243a2e63SVlad Yasevich 5432594e906SNikolay Aleksandrov vlan->vid = vid; 5442594e906SNikolay Aleksandrov vlan->flags = flags | BRIDGE_VLAN_INFO_MASTER; 5452594e906SNikolay Aleksandrov vlan->flags &= ~BRIDGE_VLAN_INFO_PVID; 5462594e906SNikolay Aleksandrov vlan->br = br; 5472594e906SNikolay Aleksandrov if (flags & BRIDGE_VLAN_INFO_BRENTRY) 5482594e906SNikolay Aleksandrov atomic_set(&vlan->refcnt, 1); 5492594e906SNikolay Aleksandrov ret = __vlan_add(vlan, flags); 5502594e906SNikolay Aleksandrov if (ret) 5512594e906SNikolay Aleksandrov kfree(vlan); 552243a2e63SVlad Yasevich 5532594e906SNikolay Aleksandrov return ret; 554243a2e63SVlad Yasevich } 555243a2e63SVlad Yasevich 5568adff41cSToshiaki Makita /* Must be protected by RTNL. 5578adff41cSToshiaki Makita * Must be called with vid in range from 1 to 4094 inclusive. 5588adff41cSToshiaki Makita */ 559243a2e63SVlad Yasevich int br_vlan_delete(struct net_bridge *br, u16 vid) 560243a2e63SVlad Yasevich { 561907b1e6eSNikolay Aleksandrov struct net_bridge_vlan_group *vg; 5622594e906SNikolay Aleksandrov struct net_bridge_vlan *v; 563243a2e63SVlad Yasevich 564243a2e63SVlad Yasevich ASSERT_RTNL(); 565243a2e63SVlad Yasevich 566907b1e6eSNikolay Aleksandrov vg = br_vlan_group(br); 567907b1e6eSNikolay Aleksandrov v = br_vlan_find(vg, vid); 5682594e906SNikolay Aleksandrov if (!v || !br_vlan_is_brentry(v)) 5692594e906SNikolay Aleksandrov return -ENOENT; 570243a2e63SVlad Yasevich 571424bb9c9SToshiaki Makita br_fdb_find_delete_local(br, NULL, br->dev->dev_addr, vid); 5723741873bSRoopa Prabhu br_fdb_delete_by_port(br, NULL, vid, 0); 573bc9a25d2SVlad Yasevich 5742594e906SNikolay Aleksandrov return __vlan_del(v); 575243a2e63SVlad Yasevich } 576243a2e63SVlad Yasevich 577243a2e63SVlad Yasevich void br_vlan_flush(struct net_bridge *br) 578243a2e63SVlad Yasevich { 579f409d0edSNikolay Aleksandrov struct net_bridge_vlan_group *vg; 580f409d0edSNikolay Aleksandrov 581243a2e63SVlad Yasevich ASSERT_RTNL(); 582243a2e63SVlad Yasevich 583f409d0edSNikolay Aleksandrov vg = br_vlan_group(br); 584f409d0edSNikolay Aleksandrov __vlan_flush(vg); 585f409d0edSNikolay Aleksandrov RCU_INIT_POINTER(br->vlgrp, NULL); 586f409d0edSNikolay Aleksandrov synchronize_rcu(); 587f409d0edSNikolay Aleksandrov __vlan_group_free(vg); 588243a2e63SVlad Yasevich } 589243a2e63SVlad Yasevich 5902594e906SNikolay Aleksandrov struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid) 5912b292fb4SToshiaki Makita { 5922594e906SNikolay Aleksandrov if (!vg) 5932594e906SNikolay Aleksandrov return NULL; 5942b292fb4SToshiaki Makita 5952594e906SNikolay Aleksandrov return br_vlan_lookup(&vg->vlan_hash, vid); 5962b292fb4SToshiaki Makita } 5972b292fb4SToshiaki Makita 598204177f3SToshiaki Makita /* Must be protected by RTNL. */ 599204177f3SToshiaki Makita static void recalculate_group_addr(struct net_bridge *br) 600204177f3SToshiaki Makita { 601204177f3SToshiaki Makita if (br->group_addr_set) 602204177f3SToshiaki Makita return; 603204177f3SToshiaki Makita 604204177f3SToshiaki Makita spin_lock_bh(&br->lock); 605204177f3SToshiaki Makita if (!br->vlan_enabled || br->vlan_proto == htons(ETH_P_8021Q)) { 606204177f3SToshiaki Makita /* Bridge Group Address */ 607204177f3SToshiaki Makita br->group_addr[5] = 0x00; 608204177f3SToshiaki Makita } else { /* vlan_enabled && ETH_P_8021AD */ 609204177f3SToshiaki Makita /* Provider Bridge Group Address */ 610204177f3SToshiaki Makita br->group_addr[5] = 0x08; 611204177f3SToshiaki Makita } 612204177f3SToshiaki Makita spin_unlock_bh(&br->lock); 613204177f3SToshiaki Makita } 614204177f3SToshiaki Makita 615204177f3SToshiaki Makita /* Must be protected by RTNL. */ 616204177f3SToshiaki Makita void br_recalculate_fwd_mask(struct net_bridge *br) 617204177f3SToshiaki Makita { 618204177f3SToshiaki Makita if (!br->vlan_enabled || br->vlan_proto == htons(ETH_P_8021Q)) 619204177f3SToshiaki Makita br->group_fwd_mask_required = BR_GROUPFWD_DEFAULT; 620204177f3SToshiaki Makita else /* vlan_enabled && ETH_P_8021AD */ 621204177f3SToshiaki Makita br->group_fwd_mask_required = BR_GROUPFWD_8021AD & 622204177f3SToshiaki Makita ~(1u << br->group_addr[5]); 623204177f3SToshiaki Makita } 624204177f3SToshiaki Makita 625a7854037SNikolay Aleksandrov int __br_vlan_filter_toggle(struct net_bridge *br, unsigned long val) 626243a2e63SVlad Yasevich { 627243a2e63SVlad Yasevich if (br->vlan_enabled == val) 628a7854037SNikolay Aleksandrov return 0; 629243a2e63SVlad Yasevich 630243a2e63SVlad Yasevich br->vlan_enabled = val; 6312796d0c6SVlad Yasevich br_manage_promisc(br); 632204177f3SToshiaki Makita recalculate_group_addr(br); 633204177f3SToshiaki Makita br_recalculate_fwd_mask(br); 634243a2e63SVlad Yasevich 635a7854037SNikolay Aleksandrov return 0; 636a7854037SNikolay Aleksandrov } 637a7854037SNikolay Aleksandrov 638a7854037SNikolay Aleksandrov int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val) 639a7854037SNikolay Aleksandrov { 640a7854037SNikolay Aleksandrov if (!rtnl_trylock()) 641a7854037SNikolay Aleksandrov return restart_syscall(); 642a7854037SNikolay Aleksandrov 643a7854037SNikolay Aleksandrov __br_vlan_filter_toggle(br, val); 644243a2e63SVlad Yasevich rtnl_unlock(); 645a7854037SNikolay Aleksandrov 646243a2e63SVlad Yasevich return 0; 647243a2e63SVlad Yasevich } 648243a2e63SVlad Yasevich 649d2d427b3SToshiaki Makita int __br_vlan_set_proto(struct net_bridge *br, __be16 proto) 650204177f3SToshiaki Makita { 651204177f3SToshiaki Makita int err = 0; 652204177f3SToshiaki Makita struct net_bridge_port *p; 6532594e906SNikolay Aleksandrov struct net_bridge_vlan *vlan; 654907b1e6eSNikolay Aleksandrov struct net_bridge_vlan_group *vg; 655d2d427b3SToshiaki Makita __be16 oldproto; 656204177f3SToshiaki Makita 657204177f3SToshiaki Makita if (br->vlan_proto == proto) 658d2d427b3SToshiaki Makita return 0; 659204177f3SToshiaki Makita 660204177f3SToshiaki Makita /* Add VLANs for the new proto to the device filter. */ 661204177f3SToshiaki Makita list_for_each_entry(p, &br->port_list, list) { 662907b1e6eSNikolay Aleksandrov vg = nbp_vlan_group(p); 663907b1e6eSNikolay Aleksandrov list_for_each_entry(vlan, &vg->vlan_list, vlist) { 6642594e906SNikolay Aleksandrov err = vlan_vid_add(p->dev, proto, vlan->vid); 665204177f3SToshiaki Makita if (err) 666204177f3SToshiaki Makita goto err_filt; 667204177f3SToshiaki Makita } 668204177f3SToshiaki Makita } 669204177f3SToshiaki Makita 670204177f3SToshiaki Makita oldproto = br->vlan_proto; 671204177f3SToshiaki Makita br->vlan_proto = proto; 672204177f3SToshiaki Makita 673204177f3SToshiaki Makita recalculate_group_addr(br); 674204177f3SToshiaki Makita br_recalculate_fwd_mask(br); 675204177f3SToshiaki Makita 676204177f3SToshiaki Makita /* Delete VLANs for the old proto from the device filter. */ 677907b1e6eSNikolay Aleksandrov list_for_each_entry(p, &br->port_list, list) { 678907b1e6eSNikolay Aleksandrov vg = nbp_vlan_group(p); 679907b1e6eSNikolay Aleksandrov list_for_each_entry(vlan, &vg->vlan_list, vlist) 6802594e906SNikolay Aleksandrov vlan_vid_del(p->dev, oldproto, vlan->vid); 681907b1e6eSNikolay Aleksandrov } 682204177f3SToshiaki Makita 683d2d427b3SToshiaki Makita return 0; 684204177f3SToshiaki Makita 685204177f3SToshiaki Makita err_filt: 686907b1e6eSNikolay Aleksandrov list_for_each_entry_continue_reverse(vlan, &vg->vlan_list, vlist) 6872594e906SNikolay Aleksandrov vlan_vid_del(p->dev, proto, vlan->vid); 688204177f3SToshiaki Makita 689907b1e6eSNikolay Aleksandrov list_for_each_entry_continue_reverse(p, &br->port_list, list) { 690907b1e6eSNikolay Aleksandrov vg = nbp_vlan_group(p); 691907b1e6eSNikolay Aleksandrov list_for_each_entry(vlan, &vg->vlan_list, vlist) 6922594e906SNikolay Aleksandrov vlan_vid_del(p->dev, proto, vlan->vid); 693907b1e6eSNikolay Aleksandrov } 694204177f3SToshiaki Makita 695d2d427b3SToshiaki Makita return err; 696d2d427b3SToshiaki Makita } 697d2d427b3SToshiaki Makita 698d2d427b3SToshiaki Makita int br_vlan_set_proto(struct net_bridge *br, unsigned long val) 699d2d427b3SToshiaki Makita { 700d2d427b3SToshiaki Makita int err; 701d2d427b3SToshiaki Makita 702d2d427b3SToshiaki Makita if (val != ETH_P_8021Q && val != ETH_P_8021AD) 703d2d427b3SToshiaki Makita return -EPROTONOSUPPORT; 704d2d427b3SToshiaki Makita 705d2d427b3SToshiaki Makita if (!rtnl_trylock()) 706d2d427b3SToshiaki Makita return restart_syscall(); 707d2d427b3SToshiaki Makita 708d2d427b3SToshiaki Makita err = __br_vlan_set_proto(br, htons(val)); 709d2d427b3SToshiaki Makita rtnl_unlock(); 710d2d427b3SToshiaki Makita 711d2d427b3SToshiaki Makita return err; 712204177f3SToshiaki Makita } 713204177f3SToshiaki Makita 71477751ee8SNikolay Aleksandrov static bool vlan_default_pvid(struct net_bridge_vlan_group *vg, u16 vid) 7155be5a2dfSVlad Yasevich { 7162594e906SNikolay Aleksandrov struct net_bridge_vlan *v; 7172594e906SNikolay Aleksandrov 71877751ee8SNikolay Aleksandrov if (vid != vg->pvid) 7192594e906SNikolay Aleksandrov return false; 7202594e906SNikolay Aleksandrov 7212594e906SNikolay Aleksandrov v = br_vlan_lookup(&vg->vlan_hash, vid); 7222594e906SNikolay Aleksandrov if (v && br_vlan_should_use(v) && 7232594e906SNikolay Aleksandrov (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)) 7242594e906SNikolay Aleksandrov return true; 7252594e906SNikolay Aleksandrov 7262594e906SNikolay Aleksandrov return false; 7275be5a2dfSVlad Yasevich } 7285be5a2dfSVlad Yasevich 7295be5a2dfSVlad Yasevich static void br_vlan_disable_default_pvid(struct net_bridge *br) 7305be5a2dfSVlad Yasevich { 7315be5a2dfSVlad Yasevich struct net_bridge_port *p; 7325be5a2dfSVlad Yasevich u16 pvid = br->default_pvid; 7335be5a2dfSVlad Yasevich 7345be5a2dfSVlad Yasevich /* Disable default_pvid on all ports where it is still 7355be5a2dfSVlad Yasevich * configured. 7365be5a2dfSVlad Yasevich */ 737907b1e6eSNikolay Aleksandrov if (vlan_default_pvid(br_vlan_group(br), pvid)) 7385be5a2dfSVlad Yasevich br_vlan_delete(br, pvid); 7395be5a2dfSVlad Yasevich 7405be5a2dfSVlad Yasevich list_for_each_entry(p, &br->port_list, list) { 741907b1e6eSNikolay Aleksandrov if (vlan_default_pvid(nbp_vlan_group(p), pvid)) 7425be5a2dfSVlad Yasevich nbp_vlan_delete(p, pvid); 7435be5a2dfSVlad Yasevich } 7445be5a2dfSVlad Yasevich 7455be5a2dfSVlad Yasevich br->default_pvid = 0; 7465be5a2dfSVlad Yasevich } 7475be5a2dfSVlad Yasevich 7480f963b75SNikolay Aleksandrov int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid) 7495be5a2dfSVlad Yasevich { 7502594e906SNikolay Aleksandrov const struct net_bridge_vlan *pvent; 751907b1e6eSNikolay Aleksandrov struct net_bridge_vlan_group *vg; 7525be5a2dfSVlad Yasevich struct net_bridge_port *p; 7535be5a2dfSVlad Yasevich u16 old_pvid; 7545be5a2dfSVlad Yasevich int err = 0; 7555be5a2dfSVlad Yasevich unsigned long *changed; 7565be5a2dfSVlad Yasevich 7570f963b75SNikolay Aleksandrov if (!pvid) { 7580f963b75SNikolay Aleksandrov br_vlan_disable_default_pvid(br); 7590f963b75SNikolay Aleksandrov return 0; 7600f963b75SNikolay Aleksandrov } 7610f963b75SNikolay Aleksandrov 7625be5a2dfSVlad Yasevich changed = kcalloc(BITS_TO_LONGS(BR_MAX_PORTS), sizeof(unsigned long), 7635be5a2dfSVlad Yasevich GFP_KERNEL); 7645be5a2dfSVlad Yasevich if (!changed) 7655be5a2dfSVlad Yasevich return -ENOMEM; 7665be5a2dfSVlad Yasevich 7675be5a2dfSVlad Yasevich old_pvid = br->default_pvid; 7685be5a2dfSVlad Yasevich 7695be5a2dfSVlad Yasevich /* Update default_pvid config only if we do not conflict with 7705be5a2dfSVlad Yasevich * user configuration. 7715be5a2dfSVlad Yasevich */ 772907b1e6eSNikolay Aleksandrov vg = br_vlan_group(br); 773907b1e6eSNikolay Aleksandrov pvent = br_vlan_find(vg, pvid); 774907b1e6eSNikolay Aleksandrov if ((!old_pvid || vlan_default_pvid(vg, old_pvid)) && 7752594e906SNikolay Aleksandrov (!pvent || !br_vlan_should_use(pvent))) { 7765be5a2dfSVlad Yasevich err = br_vlan_add(br, pvid, 7775be5a2dfSVlad Yasevich BRIDGE_VLAN_INFO_PVID | 7782594e906SNikolay Aleksandrov BRIDGE_VLAN_INFO_UNTAGGED | 7792594e906SNikolay Aleksandrov BRIDGE_VLAN_INFO_BRENTRY); 7805be5a2dfSVlad Yasevich if (err) 7815be5a2dfSVlad Yasevich goto out; 7825be5a2dfSVlad Yasevich br_vlan_delete(br, old_pvid); 7835be5a2dfSVlad Yasevich set_bit(0, changed); 7845be5a2dfSVlad Yasevich } 7855be5a2dfSVlad Yasevich 7865be5a2dfSVlad Yasevich list_for_each_entry(p, &br->port_list, list) { 7875be5a2dfSVlad Yasevich /* Update default_pvid config only if we do not conflict with 7885be5a2dfSVlad Yasevich * user configuration. 7895be5a2dfSVlad Yasevich */ 790907b1e6eSNikolay Aleksandrov vg = nbp_vlan_group(p); 7915be5a2dfSVlad Yasevich if ((old_pvid && 792907b1e6eSNikolay Aleksandrov !vlan_default_pvid(vg, old_pvid)) || 793907b1e6eSNikolay Aleksandrov br_vlan_find(vg, pvid)) 7945be5a2dfSVlad Yasevich continue; 7955be5a2dfSVlad Yasevich 7965be5a2dfSVlad Yasevich err = nbp_vlan_add(p, pvid, 7975be5a2dfSVlad Yasevich BRIDGE_VLAN_INFO_PVID | 7985be5a2dfSVlad Yasevich BRIDGE_VLAN_INFO_UNTAGGED); 7995be5a2dfSVlad Yasevich if (err) 8005be5a2dfSVlad Yasevich goto err_port; 8015be5a2dfSVlad Yasevich nbp_vlan_delete(p, old_pvid); 8025be5a2dfSVlad Yasevich set_bit(p->port_no, changed); 8035be5a2dfSVlad Yasevich } 8045be5a2dfSVlad Yasevich 8055be5a2dfSVlad Yasevich br->default_pvid = pvid; 8065be5a2dfSVlad Yasevich 8075be5a2dfSVlad Yasevich out: 8085be5a2dfSVlad Yasevich kfree(changed); 8095be5a2dfSVlad Yasevich return err; 8105be5a2dfSVlad Yasevich 8115be5a2dfSVlad Yasevich err_port: 8125be5a2dfSVlad Yasevich list_for_each_entry_continue_reverse(p, &br->port_list, list) { 8135be5a2dfSVlad Yasevich if (!test_bit(p->port_no, changed)) 8145be5a2dfSVlad Yasevich continue; 8155be5a2dfSVlad Yasevich 8165be5a2dfSVlad Yasevich if (old_pvid) 8175be5a2dfSVlad Yasevich nbp_vlan_add(p, old_pvid, 8185be5a2dfSVlad Yasevich BRIDGE_VLAN_INFO_PVID | 8195be5a2dfSVlad Yasevich BRIDGE_VLAN_INFO_UNTAGGED); 8205be5a2dfSVlad Yasevich nbp_vlan_delete(p, pvid); 8215be5a2dfSVlad Yasevich } 8225be5a2dfSVlad Yasevich 8235be5a2dfSVlad Yasevich if (test_bit(0, changed)) { 8245be5a2dfSVlad Yasevich if (old_pvid) 8255be5a2dfSVlad Yasevich br_vlan_add(br, old_pvid, 8265be5a2dfSVlad Yasevich BRIDGE_VLAN_INFO_PVID | 8272594e906SNikolay Aleksandrov BRIDGE_VLAN_INFO_UNTAGGED | 8282594e906SNikolay Aleksandrov BRIDGE_VLAN_INFO_BRENTRY); 8295be5a2dfSVlad Yasevich br_vlan_delete(br, pvid); 8305be5a2dfSVlad Yasevich } 8315be5a2dfSVlad Yasevich goto out; 8325be5a2dfSVlad Yasevich } 8335be5a2dfSVlad Yasevich 83496a20d9dSVlad Yasevich int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val) 83596a20d9dSVlad Yasevich { 83696a20d9dSVlad Yasevich u16 pvid = val; 83796a20d9dSVlad Yasevich int err = 0; 83896a20d9dSVlad Yasevich 8395be5a2dfSVlad Yasevich if (val >= VLAN_VID_MASK) 84096a20d9dSVlad Yasevich return -EINVAL; 84196a20d9dSVlad Yasevich 84296a20d9dSVlad Yasevich if (!rtnl_trylock()) 84396a20d9dSVlad Yasevich return restart_syscall(); 84496a20d9dSVlad Yasevich 84596a20d9dSVlad Yasevich if (pvid == br->default_pvid) 84696a20d9dSVlad Yasevich goto unlock; 84796a20d9dSVlad Yasevich 84896a20d9dSVlad Yasevich /* Only allow default pvid change when filtering is disabled */ 84996a20d9dSVlad Yasevich if (br->vlan_enabled) { 85096a20d9dSVlad Yasevich pr_info_once("Please disable vlan filtering to change default_pvid\n"); 85196a20d9dSVlad Yasevich err = -EPERM; 85296a20d9dSVlad Yasevich goto unlock; 85396a20d9dSVlad Yasevich } 8545be5a2dfSVlad Yasevich err = __br_vlan_set_default_pvid(br, pvid); 85596a20d9dSVlad Yasevich unlock: 85696a20d9dSVlad Yasevich rtnl_unlock(); 85796a20d9dSVlad Yasevich return err; 85896a20d9dSVlad Yasevich } 85996a20d9dSVlad Yasevich 8605be5a2dfSVlad Yasevich int br_vlan_init(struct net_bridge *br) 8618580e211SToshiaki Makita { 862907b1e6eSNikolay Aleksandrov struct net_bridge_vlan_group *vg; 8632594e906SNikolay Aleksandrov int ret = -ENOMEM; 8642594e906SNikolay Aleksandrov 865907b1e6eSNikolay Aleksandrov vg = kzalloc(sizeof(*vg), GFP_KERNEL); 866907b1e6eSNikolay Aleksandrov if (!vg) 8672594e906SNikolay Aleksandrov goto out; 868907b1e6eSNikolay Aleksandrov ret = rhashtable_init(&vg->vlan_hash, &br_vlan_rht_params); 8692594e906SNikolay Aleksandrov if (ret) 8702594e906SNikolay Aleksandrov goto err_rhtbl; 871907b1e6eSNikolay Aleksandrov INIT_LIST_HEAD(&vg->vlan_list); 8728580e211SToshiaki Makita br->vlan_proto = htons(ETH_P_8021Q); 87396a20d9dSVlad Yasevich br->default_pvid = 1; 874907b1e6eSNikolay Aleksandrov rcu_assign_pointer(br->vlgrp, vg); 8752594e906SNikolay Aleksandrov ret = br_vlan_add(br, 1, 8762594e906SNikolay Aleksandrov BRIDGE_VLAN_INFO_PVID | BRIDGE_VLAN_INFO_UNTAGGED | 8772594e906SNikolay Aleksandrov BRIDGE_VLAN_INFO_BRENTRY); 8782594e906SNikolay Aleksandrov if (ret) 8792594e906SNikolay Aleksandrov goto err_vlan_add; 8802594e906SNikolay Aleksandrov 8812594e906SNikolay Aleksandrov out: 8822594e906SNikolay Aleksandrov return ret; 8832594e906SNikolay Aleksandrov 8842594e906SNikolay Aleksandrov err_vlan_add: 885907b1e6eSNikolay Aleksandrov rhashtable_destroy(&vg->vlan_hash); 8862594e906SNikolay Aleksandrov err_rhtbl: 887907b1e6eSNikolay Aleksandrov kfree(vg); 8882594e906SNikolay Aleksandrov 8892594e906SNikolay Aleksandrov goto out; 8902594e906SNikolay Aleksandrov } 8912594e906SNikolay Aleksandrov 8922594e906SNikolay Aleksandrov int nbp_vlan_init(struct net_bridge_port *p) 8932594e906SNikolay Aleksandrov { 894263344e6SNikolay Aleksandrov struct net_bridge_vlan_group *vg; 8952594e906SNikolay Aleksandrov int ret = -ENOMEM; 8962594e906SNikolay Aleksandrov 897263344e6SNikolay Aleksandrov vg = kzalloc(sizeof(struct net_bridge_vlan_group), GFP_KERNEL); 898263344e6SNikolay Aleksandrov if (!vg) 8992594e906SNikolay Aleksandrov goto out; 9002594e906SNikolay Aleksandrov 901263344e6SNikolay Aleksandrov ret = rhashtable_init(&vg->vlan_hash, &br_vlan_rht_params); 9022594e906SNikolay Aleksandrov if (ret) 9032594e906SNikolay Aleksandrov goto err_rhtbl; 904263344e6SNikolay Aleksandrov INIT_LIST_HEAD(&vg->vlan_list); 905907b1e6eSNikolay Aleksandrov rcu_assign_pointer(p->vlgrp, vg); 9062594e906SNikolay Aleksandrov if (p->br->default_pvid) { 9072594e906SNikolay Aleksandrov ret = nbp_vlan_add(p, p->br->default_pvid, 9082594e906SNikolay Aleksandrov BRIDGE_VLAN_INFO_PVID | 9092594e906SNikolay Aleksandrov BRIDGE_VLAN_INFO_UNTAGGED); 9102594e906SNikolay Aleksandrov if (ret) 9112594e906SNikolay Aleksandrov goto err_vlan_add; 9122594e906SNikolay Aleksandrov } 9132594e906SNikolay Aleksandrov out: 9142594e906SNikolay Aleksandrov return ret; 9152594e906SNikolay Aleksandrov 9162594e906SNikolay Aleksandrov err_vlan_add: 91707bc588fSIdo Schimmel RCU_INIT_POINTER(p->vlgrp, NULL); 91807bc588fSIdo Schimmel synchronize_rcu(); 919263344e6SNikolay Aleksandrov rhashtable_destroy(&vg->vlan_hash); 9202594e906SNikolay Aleksandrov err_rhtbl: 921263344e6SNikolay Aleksandrov kfree(vg); 9222594e906SNikolay Aleksandrov 9232594e906SNikolay Aleksandrov goto out; 9248580e211SToshiaki Makita } 9258580e211SToshiaki Makita 9268adff41cSToshiaki Makita /* Must be protected by RTNL. 9278adff41cSToshiaki Makita * Must be called with vid in range from 1 to 4094 inclusive. 9288adff41cSToshiaki Makita */ 929552406c4SVlad Yasevich int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags) 930243a2e63SVlad Yasevich { 9312594e906SNikolay Aleksandrov struct net_bridge_vlan *vlan; 9322594e906SNikolay Aleksandrov int ret; 933243a2e63SVlad Yasevich 934243a2e63SVlad Yasevich ASSERT_RTNL(); 935243a2e63SVlad Yasevich 936907b1e6eSNikolay Aleksandrov vlan = br_vlan_find(nbp_vlan_group(port), vid); 9372594e906SNikolay Aleksandrov if (vlan) { 9382594e906SNikolay Aleksandrov __vlan_add_flags(vlan, flags); 9392594e906SNikolay Aleksandrov return 0; 940243a2e63SVlad Yasevich } 941243a2e63SVlad Yasevich 9422594e906SNikolay Aleksandrov vlan = kzalloc(sizeof(*vlan), GFP_KERNEL); 9432594e906SNikolay Aleksandrov if (!vlan) 9442594e906SNikolay Aleksandrov return -ENOMEM; 945243a2e63SVlad Yasevich 9462594e906SNikolay Aleksandrov vlan->vid = vid; 9472594e906SNikolay Aleksandrov vlan->port = port; 9482594e906SNikolay Aleksandrov ret = __vlan_add(vlan, flags); 9492594e906SNikolay Aleksandrov if (ret) 9502594e906SNikolay Aleksandrov kfree(vlan); 951243a2e63SVlad Yasevich 9522594e906SNikolay Aleksandrov return ret; 953243a2e63SVlad Yasevich } 954243a2e63SVlad Yasevich 9558adff41cSToshiaki Makita /* Must be protected by RTNL. 9568adff41cSToshiaki Makita * Must be called with vid in range from 1 to 4094 inclusive. 9578adff41cSToshiaki Makita */ 958243a2e63SVlad Yasevich int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) 959243a2e63SVlad Yasevich { 9602594e906SNikolay Aleksandrov struct net_bridge_vlan *v; 961243a2e63SVlad Yasevich 962243a2e63SVlad Yasevich ASSERT_RTNL(); 963243a2e63SVlad Yasevich 964907b1e6eSNikolay Aleksandrov v = br_vlan_find(nbp_vlan_group(port), vid); 9652594e906SNikolay Aleksandrov if (!v) 9662594e906SNikolay Aleksandrov return -ENOENT; 967424bb9c9SToshiaki Makita br_fdb_find_delete_local(port->br, port, port->dev->dev_addr, vid); 9681ea2d020SNikolay Aleksandrov br_fdb_delete_by_port(port->br, port, vid, 0); 969bc9a25d2SVlad Yasevich 9702594e906SNikolay Aleksandrov return __vlan_del(v); 971243a2e63SVlad Yasevich } 972243a2e63SVlad Yasevich 973243a2e63SVlad Yasevich void nbp_vlan_flush(struct net_bridge_port *port) 974243a2e63SVlad Yasevich { 975f409d0edSNikolay Aleksandrov struct net_bridge_vlan_group *vg; 976f409d0edSNikolay Aleksandrov 977243a2e63SVlad Yasevich ASSERT_RTNL(); 978243a2e63SVlad Yasevich 979f409d0edSNikolay Aleksandrov vg = nbp_vlan_group(port); 980f409d0edSNikolay Aleksandrov __vlan_flush(vg); 981f409d0edSNikolay Aleksandrov RCU_INIT_POINTER(port->vlgrp, NULL); 982f409d0edSNikolay Aleksandrov synchronize_rcu(); 983f409d0edSNikolay Aleksandrov __vlan_group_free(vg); 9845be5a2dfSVlad Yasevich } 985