diff options
| author | stephen hemminger <shemminger@vyatta.com> | 2012-11-13 07:53:08 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-11-14 20:20:44 -0500 |
| commit | 1007dd1aa50b0403df370834f647abef1722925c (patch) | |
| tree | cd36018c9fa1ae353e7e27f1080950d19d44eaa5 /net/bridge/br_sysfs_if.c | |
| parent | a2e01a65cd7135dab26d27d4b589b2e5358bec99 (diff) | |
bridge: add root port blocking
This is Linux bridge implementation of root port guard.
If BPDU is received from a leaf (edge) port, it should not
be elected as root port.
Why would you want to do this?
If using STP on a bridge and the downstream bridges are not fully
trusted; this prevents a hostile guest for rerouting traffic.
Why not just use netfilter?
Netfilter does not track of follow spanning tree decisions.
It would be difficult and error prone to try and mirror STP
resolution in netfilter module.
Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/bridge/br_sysfs_if.c')
| -rw-r--r-- | net/bridge/br_sysfs_if.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/net/bridge/br_sysfs_if.c b/net/bridge/br_sysfs_if.c index d1dfa402618..80a4fc5d96a 100644 --- a/net/bridge/br_sysfs_if.c +++ b/net/bridge/br_sysfs_if.c @@ -157,6 +157,7 @@ static BRPORT_ATTR(flush, S_IWUSR, NULL, store_flush); BRPORT_ATTR_FLAG(hairpin_mode, BR_HAIRPIN_MODE); BRPORT_ATTR_FLAG(bpdu_guard, BR_BPDU_GUARD); +BRPORT_ATTR_FLAG(root_block, BR_ROOT_BLOCK); #ifdef CONFIG_BRIDGE_IGMP_SNOOPING static ssize_t show_multicast_router(struct net_bridge_port *p, char *buf) @@ -191,6 +192,7 @@ static const struct brport_attribute *brport_attrs[] = { &brport_attr_flush, &brport_attr_hairpin_mode, &brport_attr_bpdu_guard, + &brport_attr_root_block, #ifdef CONFIG_BRIDGE_IGMP_SNOOPING &brport_attr_multicast_router, #endif |