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dkim=none (message not signed) header.d=none;dmarc=pass action=none header.from=nvidia.com; Received-SPF: Pass (protection.outlook.com: domain of nvidia.com designates 216.228.117.161 as permitted sender) receiver=protection.outlook.com; client-ip=216.228.117.161; helo=mail.nvidia.com; pr=C Received: from mail.nvidia.com (216.228.117.161) by CO1PEPF00012E81.mail.protection.outlook.com (10.167.249.56) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.9891.9 via Frontend Transport; Sun, 3 May 2026 07:36:45 +0000 Received: from rnnvmail201.nvidia.com (10.129.68.8) by mail.nvidia.com (10.129.200.67) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.20; Sun, 3 May 2026 00:36:26 -0700 Received: from dev-r-vrt-155.mtr.labs.mlnx (10.126.230.37) by rnnvmail201.nvidia.com (10.129.68.8) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.20; Sun, 3 May 2026 00:36:19 -0700 From: Danielle Ratson To: CC: , , , , , , , , , , , , , , , , , , , , , , , , , , Danielle Ratson Subject: [PATCH net-next 4/6] bridge: Add port-level netlink handling for neigh_forward_grat Date: Sun, 3 May 2026 10:35:30 +0300 Message-ID: <20260503073532.2138165-5-danieller@nvidia.com> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20260503073532.2138165-1-danieller@nvidia.com> References: <20260503073532.2138165-1-danieller@nvidia.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-ClientProxiedBy: rnnvmail201.nvidia.com (10.129.68.8) To rnnvmail201.nvidia.com (10.129.68.8) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CO1PEPF00012E81:EE_|SA1PR12MB6751:EE_ X-MS-Office365-Filtering-Correlation-Id: 1fa4f58b-dcec-45a0-2255-08dea8e6ba63 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|82310400026|376014|7416014|36860700016|1800799024|56012099003|22082099003|18002099003; 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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: L0bg4Q1nS4K0ocsHNW+1EM3CzFKM11W9a0MSP+yomurgjOi5RBxad6QO11gq5pDmkAt85LBscVxa9xSAS7T1p3jX12U3pUInYT7gQSIoRSEvG0QOxQmP7IRQJgT7kSBSLTbECMOtnARLFMhwHKn4/JeHfHi3aED1QZMFolBNOplIw62gTX4UtLAElZoQL7obax4MtPcgg+iENmNszz/mHMsLwx+NZPmWA0td3J+wE6nxMA5ldhgX/Oa+XTmP87Vq/Jaegy963+ybXULUxNEpSTdi75oRG+bGzQAufEMPMyWSwbpTFwPvpMC/KtURiJrT6NpDQSf8ggGkBT1kJ4CKLNZl2Vnx29t1v828rf9quJAhpNOWDjUmNfRn6wYasJsc19C3Sb0QN7jZ9r9qpBs0AnFMH9cpv5Yfy+MJMTAo470KBnJAzBYv8lwlTNh6dt0A X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 03 May 2026 07:36:45.5009 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 1fa4f58b-dcec-45a0-2255-08dea8e6ba63 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.117.161];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: CO1PEPF00012E81.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SA1PR12MB6751 Add netlink handlers for the port-level neigh_forward_grat option via IFLA_BRPORT_NEIGH_FORWARD_GRAT attribute. The default value of OFF preserves existing behavior, i.e. gratuitous ARP and unsolicited NA are suppressed when neigh_suppress is enabled. Users can explicitly set it to ON to allow these packets through. Example for enabling control via 'bridge link' command: # bridge link set dev eth0 neigh_suppress on # bridge link set dev eth0 neigh_forward_grat on Signed-off-by: Danielle Ratson Reviewed-by: Ido Schimmel Reviewed-by: Petr Machata --- net/bridge/br_netlink.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/net/bridge/br_netlink.c b/net/bridge/br_netlink.c index 6fd5386a1d64..898326c201ef 100644 --- a/net/bridge/br_netlink.c +++ b/net/bridge/br_netlink.c @@ -190,6 +190,7 @@ static inline size_t br_port_info_size(void) + nla_total_size(1) /* IFLA_BRPORT_LOCKED */ + nla_total_size(1) /* IFLA_BRPORT_MAB */ + nla_total_size(1) /* IFLA_BRPORT_NEIGH_VLAN_SUPPRESS */ + + nla_total_size(1) /* IFLA_BRPORT_NEIGH_FORWARD_GRAT */ + nla_total_size(sizeof(struct ifla_bridge_id)) /* IFLA_BRPORT_ROOT_ID */ + nla_total_size(sizeof(struct ifla_bridge_id)) /* IFLA_BRPORT_BRIDGE_ID */ + nla_total_size(sizeof(u16)) /* IFLA_BRPORT_DESIGNATED_PORT */ @@ -282,7 +283,9 @@ static int br_port_fill_attrs(struct sk_buff *skb, nla_put_u8(skb, IFLA_BRPORT_LOCKED, !!(p->flags & BR_PORT_LOCKED)) || nla_put_u8(skb, IFLA_BRPORT_MAB, !!(p->flags & BR_PORT_MAB)) || nla_put_u8(skb, IFLA_BRPORT_NEIGH_VLAN_SUPPRESS, - !!(p->flags & BR_NEIGH_VLAN_SUPPRESS))) + !!(p->flags & BR_NEIGH_VLAN_SUPPRESS)) || + nla_put_u8(skb, IFLA_BRPORT_NEIGH_FORWARD_GRAT, + !!(p->flags & BR_NEIGH_FORWARD_GRAT))) return -EMSGSIZE; timerval = br_timer_value(&p->message_age_timer); @@ -902,6 +905,7 @@ static const struct nla_policy br_port_policy[IFLA_BRPORT_MAX + 1] = { [IFLA_BRPORT_MCAST_MAX_GROUPS] = { .type = NLA_U32 }, [IFLA_BRPORT_NEIGH_VLAN_SUPPRESS] = NLA_POLICY_MAX(NLA_U8, 1), [IFLA_BRPORT_BACKUP_NHID] = { .type = NLA_U32 }, + [IFLA_BRPORT_NEIGH_FORWARD_GRAT] = NLA_POLICY_MAX(NLA_U8, 1), }; /* Change the state of the port and notify spanning tree */ @@ -970,6 +974,8 @@ static int br_setport(struct net_bridge_port *p, struct nlattr *tb[], br_set_port_flag(p, tb, IFLA_BRPORT_MAB, BR_PORT_MAB); br_set_port_flag(p, tb, IFLA_BRPORT_NEIGH_VLAN_SUPPRESS, BR_NEIGH_VLAN_SUPPRESS); + br_set_port_flag(p, tb, IFLA_BRPORT_NEIGH_FORWARD_GRAT, + BR_NEIGH_FORWARD_GRAT); if ((p->flags & BR_PORT_MAB) && (!(p->flags & BR_PORT_LOCKED) || !(p->flags & BR_LEARNING))) { -- 2.51.0