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authorstephen hemminger <shemminger@vyatta.com>2012-11-13 07:53:07 +0000
committerDavid S. Miller <davem@davemloft.net>2012-11-14 20:20:44 -0500
commita2e01a65cd7135dab26d27d4b589b2e5358bec99 (patch)
tree3b51f10fa3e17cb734daba83b94d7466ac348a67 /net/bridge/br_sysfs_if.c
parentcd7537326e617e71b5a84b205b755bc86bee8d06 (diff)
downloadop-kernel-dev-a2e01a65cd7135dab26d27d4b589b2e5358bec99.zip
op-kernel-dev-a2e01a65cd7135dab26d27d4b589b2e5358bec99.tar.gz
bridge: implement BPDU blocking
This is Linux bridge implementation of STP protection (Cisco BPDU guard/Juniper BPDU block). BPDU block disables the bridge port if a STP BPDU packet is received. Why would you want to do this? If running Spanning Tree on bridge, hostile devices on the network may send BPDU and cause network failure. Enabling bpdu block will detect and stop this. How to recover the port? The port will be restarted if link is brought down, or removed and reattached. For example: # ip li set dev eth0 down; ip li set dev eth0 up 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.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/net/bridge/br_sysfs_if.c b/net/bridge/br_sysfs_if.c
index f26173d3..d1dfa40 100644
--- a/net/bridge/br_sysfs_if.c
+++ b/net/bridge/br_sysfs_if.c
@@ -156,6 +156,7 @@ static int store_flush(struct net_bridge_port *p, unsigned long v)
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);
#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
static ssize_t show_multicast_router(struct net_bridge_port *p, char *buf)
@@ -189,6 +190,7 @@ static const struct brport_attribute *brport_attrs[] = {
&brport_attr_hold_timer,
&brport_attr_flush,
&brport_attr_hairpin_mode,
+ &brport_attr_bpdu_guard,
#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
&brport_attr_multicast_router,
#endif
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