target/linux/generic/patches-3.8/642-bridge_port_isolate.patch

   1 --- a/net/bridge/br_private.h
   2 +++ b/net/bridge/br_private.h
   3 @@ -139,6 +139,7 @@ struct net_bridge_port
   4  #define BR_BPDU_GUARD           0x00000002
   5  #define BR_ROOT_BLOCK          0x00000004
   6  #define BR_MULTICAST_FAST_LEAVE        0x00000008
   7 +#define BR_ISOLATE_MODE                0x00000010
   8
   9  #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
  10         u32                             multicast_startup_queries_sent;
  11 --- a/net/bridge/br_sysfs_if.c
  12 +++ b/net/bridge/br_sysfs_if.c
  13 @@ -159,6 +159,22 @@ BRPORT_ATTR_FLAG(hairpin_mode, BR_HAIRPI
  14  BRPORT_ATTR_FLAG(bpdu_guard, BR_BPDU_GUARD);
  15  BRPORT_ATTR_FLAG(root_block, BR_ROOT_BLOCK);
  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 @@ -199,6 +215,7 @@ static const struct brport_attribute *br
  37         &brport_attr_multicast_router,
  38         &brport_attr_multicast_fast_leave,
  39  #endif
  40 +       &brport_attr_isolate_mode,
  41         NULL
  42  };
  43
  44 --- a/net/bridge/br_input.c
  45 +++ b/net/bridge/br_input.c
  46 @@ -95,7 +95,8 @@ int br_handle_frame_finish(struct sk_buf
  47                         skb2 = skb;
  48
  49                 br->dev->stats.multicast++;
  50 -       } else if ((dst = __br_fdb_get(br, dest)) && dst->is_local) {
  51 +       } else if ((p->flags & BR_ISOLATE_MODE) ||
  52 +                  ((dst = __br_fdb_get(br, dest)) && dst->is_local)) {
  53                 skb2 = skb;
  54                 /* Do not forward the packet since it's local. */
  55                 skb = NULL;
  56 --- a/net/bridge/br_forward.c
  57 +++ b/net/bridge/br_forward.c
  58 @@ -110,7 +110,7 @@ void br_deliver(const struct net_bridge_
  59  /* called with rcu_read_lock */
  60  void br_forward(const struct net_bridge_port *to, struct sk_buff *skb, struct sk_buff *skb0)
  61  {
  62 -       if (should_deliver(to, skb)) {
  63 +       if (should_deliver(to, skb) && !(to->flags & BR_ISOLATE_MODE)) {
  64                 if (skb0)
  65                         deliver_clone(to, skb, __br_forward);
  66                 else
  67 @@ -165,7 +165,8 @@ out:
  68  static void br_flood(struct net_bridge *br, struct sk_buff *skb,
  69                      struct sk_buff *skb0,
  70                      void (*__packet_hook)(const struct net_bridge_port *p,
  71 -                                          struct sk_buff *skb))
  72 +                                          struct sk_buff *skb),
  73 +                    bool forward)
  74  {
  75         struct net_bridge_port *p;
  76         struct net_bridge_port *prev;
  77 @@ -173,6 +174,9 @@ 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 +
  84                 prev = maybe_deliver(prev, p, skb, __packet_hook);
  85                 if (IS_ERR(prev))
  86                         goto out;
  87 @@ -196,14 +200,14 @@ out:
  88  /* called with rcu_read_lock */
  89  void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb)
  90  {
  91 -       br_flood(br, skb, NULL, __br_deliver);
  92 +       br_flood(br, skb, NULL, __br_deliver, false);
  93  }
  94
  95  /* called under bridge lock */
  96  void br_flood_forward(struct net_bridge *br, struct sk_buff *skb,
  97                       struct sk_buff *skb2)
  98  {
  99 -       br_flood(br, skb, skb2, __br_forward);
 100 +       br_flood(br, skb, skb2, __br_forward, true);
 101  }
 102
 103  #ifdef CONFIG_BRIDGE_IGMP_SNOOPING