target/linux/generic/pending-5.4/763-net-bridge-switchdev-Include-local-flag-in-FDB-notif.patch

   1 From ec5be4f79026282925ae383caa431a8d41e3456a Mon Sep 17 00:00:00 2001
   2 From: Tobias Waldekranz <tobias@waldekranz.com>
   3 Date: Sat, 16 Jan 2021 02:25:10 +0100
   4 Subject: [PATCH] net: bridge: switchdev: Include local flag in FDB
   5  notifications
   6
   7 Some switchdev drivers, notably DSA, ignore all dynamically learned
   8 address notifications (!added_by_user) as these are autonomously added
   9 by the switch. Previously, such a notification was indistinguishable
  10 from a local address notification. Include a local bit in the
  11 notification so that the two classes can be discriminated.
  12
  13 This allows DSA-like devices to add local addresses to the hardware
  14 FDB (with the CPU as the destination), thereby avoiding flows towards
  15 the CPU being flooded by the switch as unknown unicast.
  16
  17 Signed-off-by: Tobias Waldekranz <tobias@waldekranz.com>
  18 ---
  19  include/net/switchdev.h   | 1 +
  20  net/bridge/br_switchdev.c | 1 +
  21  2 files changed, 2 insertions(+)
  22
  23 --- a/include/net/switchdev.h
  24 +++ b/include/net/switchdev.h
  25 @@ -124,6 +124,7 @@ struct switchdev_notifier_fdb_info {
  26         const unsigned char *addr;
  27         u16 vid;
  28         u8 added_by_user:1,
  29 +          local:1,
  30            offloaded:1;
  31  };
  32
  33 --- a/net/bridge/br_switchdev.c
  34 +++ b/net/bridge/br_switchdev.c
  35 @@ -109,6 +109,7 @@ br_switchdev_fdb_notify(const struct net
  36                 .addr = fdb->key.addr.addr,
  37                 .vid = fdb->key.vlan_id,
  38                 .added_by_user = fdb->added_by_user,
  39 +               .local = fdb->is_local,
  40                 .offloaded = fdb->offloaded,
  41         };
  42