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[193.12.47.89]) by smtp.gmail.com with ESMTPSA id 198sm1085686lfn.51.2021.01.15.17.25.49 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 15 Jan 2021 17:25:49 -0800 (PST) From: Tobias Waldekranz To: davem@davemloft.net, kuba@kernel.org Cc: andrew@lunn.ch, vivien.didelot@gmail.com, f.fainelli@gmail.com, olteanv@gmail.com, roopa@nvidia.com, nikolay@nvidia.com, netdev@vger.kernel.org Subject: [RFC net-next 2/7] net: bridge: switchdev: Include local flag in FDB notifications Date: Sat, 16 Jan 2021 02:25:10 +0100 Message-Id: <20210116012515.3152-3-tobias@waldekranz.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210116012515.3152-1-tobias@waldekranz.com> References: <20210116012515.3152-1-tobias@waldekranz.com> Organization: Westermo Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org X-Patchwork-State: RFC Some switchdev drivers, notably DSA, ignore all dynamically learned address notifications (!added_by_user) as these are autonomously added by the switch. Previously, such a notification was indistinguishable from a local address notification. Include a local bit in the notification so that the two classes can be discriminated. This allows DSA-like devices to add local addresses to the hardware FDB (with the CPU as the destination), thereby avoiding flows towards the CPU being flooded by the switch as unknown unicast. Signed-off-by: Tobias Waldekranz --- include/net/switchdev.h | 1 + net/bridge/br_switchdev.c | 1 + 2 files changed, 2 insertions(+) diff --git a/include/net/switchdev.h b/include/net/switchdev.h index 88fcac140966..43e4469a17b1 100644 --- a/include/net/switchdev.h +++ b/include/net/switchdev.h @@ -213,6 +213,7 @@ struct switchdev_notifier_fdb_info { const unsigned char *addr; u16 vid; u8 added_by_user:1, + local:1, offloaded:1; }; diff --git a/net/bridge/br_switchdev.c b/net/bridge/br_switchdev.c index ff470add8e52..1090bb3d4ee0 100644 --- a/net/bridge/br_switchdev.c +++ b/net/bridge/br_switchdev.c @@ -109,6 +109,7 @@ br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb, int type) .addr = fdb->key.addr.addr, .vid = fdb->key.vlan_id, .added_by_user = test_bit(BR_FDB_ADDED_BY_USER, &fdb->flags), + .local = test_bit(BR_FDB_LOCAL, &fdb->flags), .offloaded = test_bit(BR_FDB_OFFLOADED, &fdb->flags), };