diff options
| -rw-r--r-- | net/bridge/br_private.h | 7 | ||||
| -rw-r--r-- | net/bridge/br_sysfs_br.c | 26 | ||||
| -rw-r--r-- | net/bridge/br_vlan.c | 97 |
3 files changed, 130 insertions, 0 deletions
diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h index 4eba348..23caf5b 100644 --- a/net/bridge/br_private.h +++ b/net/bridge/br_private.h @@ -243,6 +243,7 @@ struct net_bridge unsigned long bridge_forward_delay; u8 group_addr[ETH_ALEN]; + bool group_addr_set; u16 root_port; enum { @@ -597,7 +598,9 @@ int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags); int br_vlan_delete(struct net_bridge *br, u16 vid); void br_vlan_flush(struct net_bridge *br); bool br_vlan_find(struct net_bridge *br, u16 vid); +void br_recalculate_fwd_mask(struct net_bridge *br); int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val); +int br_vlan_set_proto(struct net_bridge *br, unsigned long val); void br_vlan_init(struct net_bridge *br); int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags); int nbp_vlan_delete(struct net_bridge_port *port, u16 vid); @@ -694,6 +697,10 @@ static inline bool br_vlan_find(struct net_bridge *br, u16 vid) return false; } +static inline void br_recalculate_fwd_mask(struct net_bridge *br) +{ +} + static inline void br_vlan_init(struct net_bridge *br) { } diff --git a/net/bridge/br_sysfs_br.c b/net/bridge/br_sysfs_br.c index 8dac6555..c9e2572 100644 --- a/net/bridge/br_sysfs_br.c +++ b/net/bridge/br_sysfs_br.c @@ -312,10 +312,19 @@ static ssize_t group_addr_store(struct device *d, new_addr[5] == 3) /* 802.1X PAE address */ return -EINVAL; + if (!rtnl_trylock()) + return restart_syscall(); + spin_lock_bh(&br->lock); for (i = 0; i < 6; i++) br->group_addr[i] = new_addr[i]; spin_unlock_bh(&br->lock); + + br->group_addr_set = true; + br_recalculate_fwd_mask(br); + + rtnl_unlock(); + return len; } @@ -700,6 +709,22 @@ static ssize_t vlan_filtering_store(struct device *d, return store_bridge_parm(d, buf, len, br_vlan_filter_toggle); } static DEVICE_ATTR_RW(vlan_filtering); + +static ssize_t vlan_protocol_show(struct device *d, + struct device_attribute *attr, + char *buf) +{ + struct net_bridge *br = to_bridge(d); + return sprintf(buf, "%#06x\n", ntohs(br->vlan_proto)); +} + +static ssize_t vlan_protocol_store(struct device *d, + struct device_attribute *attr, + const char *buf, size_t len) +{ + return store_bridge_parm(d, buf, len, br_vlan_set_proto); +} +static DEVICE_ATTR_RW(vlan_protocol); #endif static struct attribute *bridge_attrs[] = { @@ -745,6 +770,7 @@ static struct attribute *bridge_attrs[] = { #endif #ifdef CONFIG_BRIDGE_VLAN_FILTERING &dev_attr_vlan_filtering.attr, + &dev_attr_vlan_protocol.attr, #endif NULL }; diff --git a/net/bridge/br_vlan.c b/net/bridge/br_vlan.c index 63bd981..2b2774f 100644 --- a/net/bridge/br_vlan.c +++ b/net/bridge/br_vlan.c @@ -378,6 +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()) @@ -388,12 +415,82 @@ int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val) 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); |