netdev - [PATCH net-next 0/4] net: bridge: fdb activity tracking

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Message-Id: <20200623204718.1057508-1-nikolay@cumulusnetworks.com>
Date:   Tue, 23 Jun 2020 23:47:14 +0300
From:   Nikolay Aleksandrov <nikolay@...ulusnetworks.com>
To:     netdev@...r.kernel.org
Cc:     roopa@...ulusnetworks.com, anuradhak@...ulusnetworks.com,
        davem@...emloft.net, bridge@...ts.linux-foundation.org,
        Nikolay Aleksandrov <nikolay@...ulusnetworks.com>
Subject: [PATCH net-next 0/4] net: bridge: fdb activity tracking

Hi,
This set adds extensions needed for EVPN multi-homing proper and
efficient mac sync. User-space (e.g. FRR) needs to be able to track
non-dynamic entry activity on per-fdb basis depending if a tracked fdb is
currently peer active or locally active and needs to be able to add new
peer active fdb (static + track + inactive) without refreshing it to get
real activity tracking. Patch 02 adds a new NDA attribute - NDA_FDB_EXT_ATTRS
to avoid future pollution of NDA attributes by bridge or vxlan. New
bridge/vxlan specific fdb attributes are embedded in NDA_FDB_EXT_ATTRS,
which is used in patch 03 to pass the new NFEA_ACTIVITY_NOTIFY attribute
which controls if an fdb should be tracked and also reflects its current
state when dumping. It is treated as a bitfield, current valid bits are:
 1 - mark an entry for activity tracking
 2 - mark an entry as inactive to avoid multiple notifications and
     reflect state properly

Patch 04 adds the ability to avoid refreshing an entry when changing it
via the NFEA_DONT_REFRESH flag. That allows user-space to mark a static
entry for tracking and keep its real activity unchanged.
The set has been extensively tested with FRR and those changes will
be upstreamed if/after it gets accepted.

Thanks,
 Nik


Nikolay Aleksandrov (4):
  net: bridge: fdb_add_entry takes ndm as argument
  net: neighbor: add fdb extended attribute
  net: bridge: add option to allow activity notifications for any fdb
    entries
  net: bridge: add a flag to avoid refreshing fdb when changing/adding

 include/uapi/linux/neighbour.h |  24 +++++++
 net/bridge/br_fdb.c            | 127 ++++++++++++++++++++++++++++-----
 net/bridge/br_private.h        |   4 ++
 net/core/neighbour.c           |   1 +
 4 files changed, 139 insertions(+), 17 deletions(-)

-- 
2.25.4