[net-next,v6,0/3] bridge: neigh msg proxy and flood suppression support

Message ID 1507353159-46814-1-git-send-email-roopa@cumulusnetworks.com
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  • bridge: neigh msg proxy and flood suppression support
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Roopa Prabhu Oct. 7, 2017, 5:12 a.m.
From: Roopa Prabhu <roopa@cumulusnetworks.com>

This series implements arp and nd suppression in the bridge
driver for ethernet vpns. 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.

v2 : rebase to latest + address some optimization feedback from Nikolay.
v3 : fix kbuild reported build errors with CONFIG_INET off
v4 : simplify port flag mask as suggested by stephen
v5 : address some feedback from Toshiaki
v6 : some v5 cleanups in nd suppress (keep it consistent with arp suppress)

Roopa Prabhu (3):
  bridge: add new BR_NEIGH_SUPPRESS port flag to suppress arp and nd
    flood
  neigh arp suppress first
  bridge: suppress nd messages from going to BR_NEIGH_SUPPRESS ports

 include/linux/if_bridge.h    |   1 +
 include/uapi/linux/if_link.h |   1 +
 net/bridge/Makefile          |   2 +-
 net/bridge/br_arp_nd_proxy.c | 492 +++++++++++++++++++++++++++++++++++++++++++
 net/bridge/br_device.c       |  18 ++
 net/bridge/br_forward.c      |   3 +-
 net/bridge/br_if.c           |   5 +
 net/bridge/br_input.c        |  73 ++-----
 net/bridge/br_netlink.c      |  16 +-
 net/bridge/br_private.h      |   9 +
 net/bridge/br_sysfs_if.c     |   2 +
 11 files changed, 561 insertions(+), 61 deletions(-)
 create mode 100644 net/bridge/br_arp_nd_proxy.c

Comments

David Miller Oct. 9, 2017, 4:12 a.m. | #1
From: Roopa Prabhu <roopa@cumulusnetworks.com>
Date: Fri,  6 Oct 2017 22:12:36 -0700

> From: Roopa Prabhu <roopa@cumulusnetworks.com>
> 
> This series implements arp and nd suppression in the bridge
> driver for ethernet vpns. 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.
> 
> v2 : rebase to latest + address some optimization feedback from Nikolay.
> v3 : fix kbuild reported build errors with CONFIG_INET off
> v4 : simplify port flag mask as suggested by stephen
> v5 : address some feedback from Toshiaki
> v6 : some v5 cleanups in nd suppress (keep it consistent with arp suppress)

Series applied, thank you.