2021-02-22 05:38:11 +00:00
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From ec5be4f79026282925ae383caa431a8d41e3456a Mon Sep 17 00:00:00 2001
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From: Tobias Waldekranz <tobias@waldekranz.com>
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Date: Sat, 16 Jan 2021 02:25:10 +0100
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Subject: [PATCH] net: bridge: switchdev: Include local flag in FDB
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notifications
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Some switchdev drivers, notably DSA, ignore all dynamically learned
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address notifications (!added_by_user) as these are autonomously added
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by the switch. Previously, such a notification was indistinguishable
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from a local address notification. Include a local bit in the
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notification so that the two classes can be discriminated.
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This allows DSA-like devices to add local addresses to the hardware
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FDB (with the CPU as the destination), thereby avoiding flows towards
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the CPU being flooded by the switch as unknown unicast.
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Signed-off-by: Tobias Waldekranz <tobias@waldekranz.com>
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---
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include/net/switchdev.h | 1 +
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net/bridge/br_switchdev.c | 1 +
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2 files changed, 2 insertions(+)
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--- a/include/net/switchdev.h
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+++ b/include/net/switchdev.h
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2022-12-06 18:22:57 +00:00
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@@ -226,6 +226,7 @@ struct switchdev_notifier_fdb_info {
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2021-02-22 05:38:11 +00:00
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const unsigned char *addr;
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u16 vid;
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u8 added_by_user:1,
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+ local:1,
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offloaded:1;
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};
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--- a/net/bridge/br_switchdev.c
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+++ b/net/bridge/br_switchdev.c
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@@ -109,6 +109,7 @@ br_switchdev_fdb_notify(const struct net
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.addr = fdb->key.addr.addr,
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.vid = fdb->key.vlan_id,
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.added_by_user = test_bit(BR_FDB_ADDED_BY_USER, &fdb->flags),
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+ .local = test_bit(BR_FDB_LOCAL, &fdb->flags),
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.offloaded = test_bit(BR_FDB_OFFLOADED, &fdb->flags),
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};
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