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authorRoopa Prabhu <roopa@cumulusnetworks.com>2017-10-06 22:12:37 -0700
committerDavid S. Miller <davem@davemloft.net>2017-10-08 21:12:04 -0700
commit821f1b21cabb46827ce39ddf82e2789680b5042a (patch)
treed5d161286e665694818231b33c4cfe38264a1079 /include
parent951f788a80ff8b6339c5c1ab888b0d4b4352efd8 (diff)
bridge: add new BR_NEIGH_SUPPRESS port flag to suppress arp and nd flood
This patch adds a new bridge port flag BR_NEIGH_SUPPRESS to suppress arp and nd flood on bridge ports. It implements rfc7432, section 10. https://tools.ietf.org/html/rfc7432#section-10 for ethernet VPN deployments. It is similar to the existing BR_PROXYARP* flags but has a few semantic differences to conform to EVPN standard. Unlike the existing flags, this new flag suppresses flood of all neigh discovery packets (arp and nd) to tunnel ports. Supports both vlan filtering and non-vlan filtering bridges. In case of EVPN, it is mainly used to avoid flooding of arp and nd packets to tunnel ports like vxlan. This patch adds netlink and sysfs support to set this bridge port flag. Signed-off-by: Roopa Prabhu <roopa@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
-rw-r--r--include/linux/if_bridge.h1
-rw-r--r--include/uapi/linux/if_link.h1
2 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/if_bridge.h b/include/linux/if_bridge.h
index 3cd18ac0697f..316ee113a220 100644
--- a/include/linux/if_bridge.h
+++ b/include/linux/if_bridge.h
@@ -49,6 +49,7 @@ struct br_ip_list {
#define BR_MULTICAST_TO_UNICAST BIT(12)
#define BR_VLAN_TUNNEL BIT(13)
#define BR_BCAST_FLOOD BIT(14)
+#define BR_NEIGH_SUPPRESS BIT(15)
#define BR_DEFAULT_AGEING_TIME (300 * HZ)
diff --git a/include/uapi/linux/if_link.h b/include/uapi/linux/if_link.h
index cd580fc0e58f..b037e0ab1975 100644
--- a/include/uapi/linux/if_link.h
+++ b/include/uapi/linux/if_link.h
@@ -327,6 +327,7 @@ enum {
IFLA_BRPORT_VLAN_TUNNEL,
IFLA_BRPORT_BCAST_FLOOD,
IFLA_BRPORT_GROUP_FWD_MASK,
+ IFLA_BRPORT_NEIGH_SUPPRESS,
__IFLA_BRPORT_MAX
};
#define IFLA_BRPORT_MAX (__IFLA_BRPORT_MAX - 1)