diff options
| author | Toshiaki Makita <makita.toshiaki@lab.ntt.co.jp> | 2014-06-10 13:59:24 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-06-12 00:22:53 +0200 |
| commit | f2808d226f4efe15a0ea44697a3525176d6c8eae (patch) | |
| tree | 45b3017e9b56116a23e835b5eeece8aada211f7e /net/bridge/br_input.c | |
| parent | bridge: Prepare for 802.1ad vlan filtering support (diff) | |
| download | linux-f2808d226f4efe15a0ea44697a3525176d6c8eae.tar.xz linux-f2808d226f4efe15a0ea44697a3525176d6c8eae.zip | |
bridge: Prepare for forwarding another bridge group addresses
If a bridge is an 802.1ad bridge, it must forward another bridge group
addresses (the Nearest Customer Bridge group addresses).
(For details, see IEEE 802.1Q-2011 8.6.3.)
As user might not want group_fwd_mask to be modified by enabling 802.1ad,
introduce a new mask, group_fwd_mask_required, which indicates addresses
the bridge wants to forward. This will be set by enabling 802.1ad.
Signed-off-by: Toshiaki Makita <makita.toshiaki@lab.ntt.co.jp>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/bridge/br_input.c')
| -rw-r--r-- | net/bridge/br_input.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/net/bridge/br_input.c b/net/bridge/br_input.c index 04d6348fd530..366c43649079 100644 --- a/net/bridge/br_input.c +++ b/net/bridge/br_input.c @@ -177,6 +177,8 @@ rx_handler_result_t br_handle_frame(struct sk_buff **pskb) p = br_port_get_rcu(skb->dev); if (unlikely(is_link_local_ether_addr(dest))) { + u16 fwd_mask = p->br->group_fwd_mask_required; + /* * See IEEE 802.1D Table 7-10 Reserved addresses * @@ -194,7 +196,8 @@ rx_handler_result_t br_handle_frame(struct sk_buff **pskb) case 0x00: /* Bridge Group Address */ /* If STP is turned off, then must forward to keep loop detection */ - if (p->br->stp_enabled == BR_NO_STP) + if (p->br->stp_enabled == BR_NO_STP || + fwd_mask & (1u << dest[5])) goto forward; break; @@ -203,7 +206,8 @@ rx_handler_result_t br_handle_frame(struct sk_buff **pskb) default: /* Allow selective forwarding for most other protocols */ - if (p->br->group_fwd_mask & (1u << dest[5])) + fwd_mask |= p->br->group_fwd_mask; + if (fwd_mask & (1u << dest[5])) goto forward; } |