From f2808d226f4efe15a0ea44697a3525176d6c8eae Mon Sep 17 00:00:00 2001 From: Toshiaki Makita Date: Tue, 10 Jun 2014 20:59:24 +0900 Subject: 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 Signed-off-by: David S. Miller --- net/bridge/br_input.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) (limited to 'net/bridge/br_input.c') 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; } -- cgit v1.2.3-70-g09d2