target/linux/generic/patches-3.19/642-bridge_port_isolate.patch

   1 --- a/include/linux/if_bridge.h
   2 +++ b/include/linux/if_bridge.h
   3 @@ -44,6 +44,7 @@ struct br_ip_list {
   4  #define BR_PROMISC             BIT(7)
   5  #define BR_PROXYARP            BIT(8)
   6  #define BR_LEARNING_SYNC       BIT(9)
   7 +#define BR_ISOLATE_MODE        BIT(10)
   8
   9  extern void brioctl_set(int (*ioctl_hook)(struct net *, unsigned int, void __user *));
  10
  11 --- a/net/bridge/br_sysfs_if.c
  12 +++ b/net/bridge/br_sysfs_if.c
  13 @@ -172,6 +172,22 @@ BRPORT_ATTR_FLAG(learning, BR_LEARNING);
  14  BRPORT_ATTR_FLAG(unicast_flood, BR_FLOOD);
  15  BRPORT_ATTR_FLAG(proxyarp, BR_PROXYARP);
  16
  17 +static ssize_t show_isolate_mode(struct net_bridge_port *p, char *buf)
  18 +{
  19 +       int isolate_mode = (p->flags & BR_ISOLATE_MODE) ? 1 : 0;
  20 +       return sprintf(buf, "%d\n", isolate_mode);
  21 +}
  22 +static ssize_t store_isolate_mode(struct net_bridge_port *p, unsigned long v)
  23 +{
  24 +       if (v)
  25 +               p->flags |= BR_ISOLATE_MODE;
  26 +       else
  27 +               p->flags &= ~BR_ISOLATE_MODE;
  28 +       return 0;
  29 +}
  30 +static BRPORT_ATTR(isolate_mode, S_IRUGO | S_IWUSR,
  31 +                  show_isolate_mode, store_isolate_mode);
  32 +
  33  #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
  34  static ssize_t show_multicast_router(struct net_bridge_port *p, char *buf)
  35  {
  36 @@ -215,6 +231,7 @@ static const struct brport_attribute *br
  37         &brport_attr_multicast_fast_leave,
  38  #endif
  39         &brport_attr_proxyarp,
  40 +       &brport_attr_isolate_mode,
  41         NULL
  42  };
  43
  44 --- a/net/bridge/br_input.c
  45 +++ b/net/bridge/br_input.c
  46 @@ -181,8 +181,8 @@ int br_handle_frame_finish(struct sk_buf
  47
  48                 unicast = false;
  49                 br->dev->stats.multicast++;
  50 -       } else if ((dst = __br_fdb_get(br, dest, vid)) &&
  51 -                       dst->is_local) {
  52 +       } else if ((p->flags & BR_ISOLATE_MODE) ||
  53 +                  ((dst = __br_fdb_get(br, dest, vid)) && dst->is_local)) {
  54                 skb2 = skb;
  55                 /* Do not forward the packet since it's local. */
  56                 skb = NULL;
  57 --- a/net/bridge/br_forward.c
  58 +++ b/net/bridge/br_forward.c
  59 @@ -117,7 +117,7 @@ EXPORT_SYMBOL_GPL(br_deliver);
  60  /* called with rcu_read_lock */
  61  void br_forward(const struct net_bridge_port *to, struct sk_buff *skb, struct sk_buff *skb0)
  62  {
  63 -       if (should_deliver(to, skb)) {
  64 +       if (should_deliver(to, skb) && !(to->flags & BR_ISOLATE_MODE)) {
  65                 if (skb0)
  66                         deliver_clone(to, skb, __br_forward);
  67                 else
  68 @@ -173,7 +173,7 @@ static void br_flood(struct net_bridge *
  69                      struct sk_buff *skb0,
  70                      void (*__packet_hook)(const struct net_bridge_port *p,
  71                                            struct sk_buff *skb),
  72 -                    bool unicast)
  73 +                                               bool unicast, bool forward)
  74  {
  75         struct net_bridge_port *p;
  76         struct net_bridge_port *prev;
  77 @@ -181,6 +181,8 @@ static void br_flood(struct net_bridge *
  78         prev = NULL;
  79
  80         list_for_each_entry_rcu(p, &br->port_list, list) {
  81 +               if (forward && (p->flags & BR_ISOLATE_MODE))
  82 +                       continue;
  83                 /* Do not flood unicast traffic to ports that turn it off */
  84                 if (unicast && !(p->flags & BR_FLOOD))
  85                         continue;
  86 @@ -212,14 +214,14 @@ out:
  87  /* called with rcu_read_lock */
  88  void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb, bool unicast)
  89  {
  90 -       br_flood(br, skb, NULL, __br_deliver, unicast);
  91 +       br_flood(br, skb, NULL, __br_deliver, unicast, false);
  92  }
  93
  94  /* called under bridge lock */
  95  void br_flood_forward(struct net_bridge *br, struct sk_buff *skb,
  96                       struct sk_buff *skb2, bool unicast)
  97  {
  98 -       br_flood(br, skb, skb2, __br_forward, unicast);
  99 +       br_flood(br, skb, skb2, __br_forward, unicast, true);
 100  }
 101
 102  #ifdef CONFIG_BRIDGE_IGMP_SNOOPING