diff options
| -rw-r--r-- | net/bridge/br_device.c | 8 | ||||
| -rw-r--r-- | net/bridge/br_if.c | 3 | ||||
| -rw-r--r-- | net/bridge/br_private.h | 14 | ||||
| -rw-r--r-- | net/bridge/br_vlan.c | 118 |
4 files changed, 136 insertions, 7 deletions
diff --git a/net/bridge/br_device.c b/net/bridge/br_device.c index 659cac15c0df..ffd379db5938 100644 --- a/net/bridge/br_device.c +++ b/net/bridge/br_device.c @@ -88,12 +88,17 @@ out: static int br_dev_init(struct net_device *dev) { struct net_bridge *br = netdev_priv(dev); + int err; br->stats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats); if (!br->stats) return -ENOMEM; - return 0; + err = br_vlan_init(br); + if (err) + free_percpu(br->stats); + + return err; } static int br_dev_open(struct net_device *dev) @@ -389,5 +394,4 @@ void br_dev_setup(struct net_device *dev) br_netfilter_rtable_init(br); br_stp_timer_init(br); br_multicast_init(br); - br_vlan_init(br); } diff --git a/net/bridge/br_if.c b/net/bridge/br_if.c index 7b7289ca2992..ed307db7a12b 100644 --- a/net/bridge/br_if.c +++ b/net/bridge/br_if.c @@ -500,6 +500,9 @@ int br_add_if(struct net_bridge *br, struct net_device *dev) if (br_fdb_insert(br, p, dev->dev_addr, 0)) netdev_err(dev, "failed insert local address bridge forwarding table\n"); + if (nbp_vlan_init(p)) + netdev_err(dev, "failed to initialize vlan filtering on this port\n"); + spin_lock_bh(&br->lock); changed_addr = br_stp_recalculate_bridge_id(br); diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h index f671561b3053..d8cbaa694227 100644 --- a/net/bridge/br_private.h +++ b/net/bridge/br_private.h @@ -605,12 +605,13 @@ 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 br_vlan_init(struct net_bridge *br); int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val); int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags); int nbp_vlan_delete(struct net_bridge_port *port, u16 vid); void nbp_vlan_flush(struct net_bridge_port *port); bool nbp_vlan_find(struct net_bridge_port *port, u16 vid); +int nbp_vlan_init(struct net_bridge_port *port); static inline struct net_port_vlans *br_get_vlan_info( const struct net_bridge *br) @@ -643,6 +644,9 @@ static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid) static inline u16 br_get_pvid(const struct net_port_vlans *v) { + if (!v) + return 0; + smp_rmb(); return v->pvid; } @@ -703,8 +707,9 @@ static inline void br_recalculate_fwd_mask(struct net_bridge *br) { } -static inline void br_vlan_init(struct net_bridge *br) +static inline int br_vlan_init(struct net_bridge *br) { + return 0; } static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags) @@ -737,6 +742,11 @@ static inline bool nbp_vlan_find(struct net_bridge_port *port, u16 vid) return false; } +static inline int nbp_vlan_init(struct net_bridge_port *port) +{ + return 0; +} + static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag) { return 0; diff --git a/net/bridge/br_vlan.c b/net/bridge/br_vlan.c index e11c9932e706..150048fb99b0 100644 --- a/net/bridge/br_vlan.c +++ b/net/bridge/br_vlan.c @@ -499,12 +499,110 @@ err_filt: goto unlock; } +static bool vlan_default_pvid(struct net_port_vlans *pv, u16 vid) +{ + return pv && vid == pv->pvid && test_bit(vid, pv->untagged_bitmap); +} + +static void br_vlan_disable_default_pvid(struct net_bridge *br) +{ + struct net_bridge_port *p; + u16 pvid = br->default_pvid; + + /* Disable default_pvid on all ports where it is still + * configured. + */ + if (vlan_default_pvid(br_get_vlan_info(br), pvid)) + br_vlan_delete(br, pvid); + + list_for_each_entry(p, &br->port_list, list) { + if (vlan_default_pvid(nbp_get_vlan_info(p), pvid)) + nbp_vlan_delete(p, pvid); + } + + br->default_pvid = 0; +} + +static int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid) +{ + struct net_bridge_port *p; + u16 old_pvid; + int err = 0; + unsigned long *changed; + + changed = kcalloc(BITS_TO_LONGS(BR_MAX_PORTS), sizeof(unsigned long), + GFP_KERNEL); + if (!changed) + return -ENOMEM; + + old_pvid = br->default_pvid; + + /* Update default_pvid config only if we do not conflict with + * user configuration. + */ + if ((!old_pvid || vlan_default_pvid(br_get_vlan_info(br), old_pvid)) && + !br_vlan_find(br, pvid)) { + err = br_vlan_add(br, pvid, + BRIDGE_VLAN_INFO_PVID | + BRIDGE_VLAN_INFO_UNTAGGED); + if (err) + goto out; + br_vlan_delete(br, old_pvid); + set_bit(0, changed); + } + + list_for_each_entry(p, &br->port_list, list) { + /* Update default_pvid config only if we do not conflict with + * user configuration. + */ + if ((old_pvid && + !vlan_default_pvid(nbp_get_vlan_info(p), old_pvid)) || + nbp_vlan_find(p, pvid)) + continue; + + err = nbp_vlan_add(p, pvid, + BRIDGE_VLAN_INFO_PVID | + BRIDGE_VLAN_INFO_UNTAGGED); + if (err) + goto err_port; + nbp_vlan_delete(p, old_pvid); + set_bit(p->port_no, changed); + } + + br->default_pvid = pvid; + +out: + kfree(changed); + return err; + +err_port: + list_for_each_entry_continue_reverse(p, &br->port_list, list) { + if (!test_bit(p->port_no, changed)) + continue; + + if (old_pvid) + nbp_vlan_add(p, old_pvid, + BRIDGE_VLAN_INFO_PVID | + BRIDGE_VLAN_INFO_UNTAGGED); + nbp_vlan_delete(p, pvid); + } + + if (test_bit(0, changed)) { + if (old_pvid) + br_vlan_add(br, old_pvid, + BRIDGE_VLAN_INFO_PVID | + BRIDGE_VLAN_INFO_UNTAGGED); + br_vlan_delete(br, pvid); + } + goto out; +} + int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val) { u16 pvid = val; int err = 0; - if (!val || val >= VLAN_VID_MASK) + if (val >= VLAN_VID_MASK) return -EINVAL; if (!rtnl_trylock()) @@ -520,17 +618,22 @@ int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val) goto unlock; } - br->default_pvid = pvid; + if (!pvid) + br_vlan_disable_default_pvid(br); + else + err = __br_vlan_set_default_pvid(br, pvid); unlock: rtnl_unlock(); return err; } -void br_vlan_init(struct net_bridge *br) +int br_vlan_init(struct net_bridge *br) { br->vlan_proto = htons(ETH_P_8021Q); br->default_pvid = 1; + return br_vlan_add(br, 1, + BRIDGE_VLAN_INFO_PVID | BRIDGE_VLAN_INFO_UNTAGGED); } /* Must be protected by RTNL. @@ -622,3 +725,12 @@ out: rcu_read_unlock(); return found; } + +int nbp_vlan_init(struct net_bridge_port *p) +{ + return p->br->default_pvid ? + nbp_vlan_add(p, p->br->default_pvid, + BRIDGE_VLAN_INFO_PVID | + BRIDGE_VLAN_INFO_UNTAGGED) : + 0; +} |