diff options
Diffstat (limited to 'net/bridge/br_vlan.c')
| -rw-r--r-- | net/bridge/br_vlan.c | 154 |
1 files changed, 142 insertions, 12 deletions
diff --git a/net/bridge/br_vlan.c b/net/bridge/br_vlan.c index 5fee2feaf292..2b2774fe0703 100644 --- a/net/bridge/br_vlan.c +++ b/net/bridge/br_vlan.c @@ -60,7 +60,7 @@ static int __vlan_add(struct net_port_vlans *v, u16 vid, u16 flags) * that ever changes this code will allow tagged * traffic to enter the bridge. */ - err = vlan_vid_add(dev, htons(ETH_P_8021Q), vid); + err = vlan_vid_add(dev, br->vlan_proto, vid); if (err) return err; } @@ -80,7 +80,7 @@ static int __vlan_add(struct net_port_vlans *v, u16 vid, u16 flags) out_filt: if (p) - vlan_vid_del(dev, htons(ETH_P_8021Q), vid); + vlan_vid_del(dev, br->vlan_proto, vid); return err; } @@ -92,8 +92,10 @@ static int __vlan_del(struct net_port_vlans *v, u16 vid) __vlan_delete_pvid(v, vid); clear_bit(vid, v->untagged_bitmap); - if (v->port_idx) - vlan_vid_del(v->parent.port->dev, htons(ETH_P_8021Q), vid); + if (v->port_idx) { + struct net_bridge_port *p = v->parent.port; + vlan_vid_del(p->dev, p->br->vlan_proto, vid); + } clear_bit(vid, v->vlan_bitmap); v->num_vlans--; @@ -158,7 +160,8 @@ out: bool br_allowed_ingress(struct net_bridge *br, struct net_port_vlans *v, struct sk_buff *skb, u16 *vid) { - int err; + bool tagged; + __be16 proto; /* If VLAN filtering is disabled on the bridge, all packets are * permitted. @@ -172,19 +175,41 @@ bool br_allowed_ingress(struct net_bridge *br, struct net_port_vlans *v, if (!v) goto drop; + proto = br->vlan_proto; + /* If vlan tx offload is disabled on bridge device and frame was * sent from vlan device on the bridge device, it does not have * HW accelerated vlan tag. */ if (unlikely(!vlan_tx_tag_present(skb) && - (skb->protocol == htons(ETH_P_8021Q) || - skb->protocol == htons(ETH_P_8021AD)))) { + skb->protocol == proto)) { skb = vlan_untag(skb); if (unlikely(!skb)) return false; } - err = br_vlan_get_tag(skb, vid); + if (!br_vlan_get_tag(skb, vid)) { + /* Tagged frame */ + if (skb->vlan_proto != proto) { + /* Protocol-mismatch, empty out vlan_tci for new tag */ + skb_push(skb, ETH_HLEN); + skb = __vlan_put_tag(skb, skb->vlan_proto, + vlan_tx_tag_get(skb)); + if (unlikely(!skb)) + return false; + + skb_pull(skb, ETH_HLEN); + skb_reset_mac_len(skb); + *vid = 0; + tagged = false; + } else { + tagged = true; + } + } else { + /* Untagged frame */ + tagged = false; + } + if (!*vid) { u16 pvid = br_get_pvid(v); @@ -199,9 +224,9 @@ bool br_allowed_ingress(struct net_bridge *br, struct net_port_vlans *v, * ingress frame is considered to belong to this vlan. */ *vid = pvid; - if (likely(err)) + if (likely(!tagged)) /* Untagged Frame. */ - __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), pvid); + __vlan_hwaccel_put_tag(skb, proto, pvid); else /* Priority-tagged Frame. * At this point, We know that skb->vlan_tci had @@ -254,7 +279,9 @@ bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid) if (!v) return false; - br_vlan_get_tag(skb, vid); + if (!br_vlan_get_tag(skb, vid) && skb->vlan_proto != br->vlan_proto) + *vid = 0; + if (!*vid) { *vid = br_get_pvid(v); if (*vid == VLAN_N_VID) @@ -351,6 +378,33 @@ out: return found; } +/* Must be protected by RTNL. */ +static void recalculate_group_addr(struct net_bridge *br) +{ + if (br->group_addr_set) + return; + + spin_lock_bh(&br->lock); + if (!br->vlan_enabled || br->vlan_proto == htons(ETH_P_8021Q)) { + /* Bridge Group Address */ + br->group_addr[5] = 0x00; + } else { /* vlan_enabled && ETH_P_8021AD */ + /* Provider Bridge Group Address */ + br->group_addr[5] = 0x08; + } + spin_unlock_bh(&br->lock); +} + +/* Must be protected by RTNL. */ +void br_recalculate_fwd_mask(struct net_bridge *br) +{ + if (!br->vlan_enabled || br->vlan_proto == htons(ETH_P_8021Q)) + br->group_fwd_mask_required = BR_GROUPFWD_DEFAULT; + else /* vlan_enabled && ETH_P_8021AD */ + br->group_fwd_mask_required = BR_GROUPFWD_8021AD & + ~(1u << br->group_addr[5]); +} + int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val) { if (!rtnl_trylock()) @@ -360,12 +414,88 @@ int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val) goto unlock; br->vlan_enabled = val; + br_manage_promisc(br); + recalculate_group_addr(br); + br_recalculate_fwd_mask(br); unlock: rtnl_unlock(); return 0; } +int br_vlan_set_proto(struct net_bridge *br, unsigned long val) +{ + int err = 0; + struct net_bridge_port *p; + struct net_port_vlans *pv; + __be16 proto, oldproto; + u16 vid, errvid; + + if (val != ETH_P_8021Q && val != ETH_P_8021AD) + return -EPROTONOSUPPORT; + + if (!rtnl_trylock()) + return restart_syscall(); + + proto = htons(val); + if (br->vlan_proto == proto) + goto unlock; + + /* Add VLANs for the new proto to the device filter. */ + list_for_each_entry(p, &br->port_list, list) { + pv = rtnl_dereference(p->vlan_info); + if (!pv) + continue; + + for_each_set_bit(vid, pv->vlan_bitmap, VLAN_N_VID) { + err = vlan_vid_add(p->dev, proto, vid); + if (err) + goto err_filt; + } + } + + oldproto = br->vlan_proto; + br->vlan_proto = proto; + + recalculate_group_addr(br); + br_recalculate_fwd_mask(br); + + /* Delete VLANs for the old proto from the device filter. */ + list_for_each_entry(p, &br->port_list, list) { + pv = rtnl_dereference(p->vlan_info); + if (!pv) + continue; + + for_each_set_bit(vid, pv->vlan_bitmap, VLAN_N_VID) + vlan_vid_del(p->dev, oldproto, vid); + } + +unlock: + rtnl_unlock(); + return err; + +err_filt: + errvid = vid; + for_each_set_bit(vid, pv->vlan_bitmap, errvid) + vlan_vid_del(p->dev, proto, vid); + + list_for_each_entry_continue_reverse(p, &br->port_list, list) { + pv = rtnl_dereference(p->vlan_info); + if (!pv) + continue; + + for_each_set_bit(vid, pv->vlan_bitmap, VLAN_N_VID) + vlan_vid_del(p->dev, proto, vid); + } + + goto unlock; +} + +void br_vlan_init(struct net_bridge *br) +{ + br->vlan_proto = htons(ETH_P_8021Q); +} + /* Must be protected by RTNL. * Must be called with vid in range from 1 to 4094 inclusive. */ @@ -432,7 +562,7 @@ void nbp_vlan_flush(struct net_bridge_port *port) return; for_each_set_bit(vid, pv->vlan_bitmap, VLAN_N_VID) - vlan_vid_del(port->dev, htons(ETH_P_8021Q), vid); + vlan_vid_del(port->dev, port->br->vlan_proto, vid); __vlan_flush(pv); } |