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Miller" , Jakub Kicinski , , , CC: Joseph Huang Subject: [PATCH 6/6] bridge: Always multicast_flood Reports Date: Tue, 4 May 2021 14:22:59 -0400 Message-ID: <20210504182259.5042-7-Joseph.Huang@garmin.com> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210504182259.5042-1-Joseph.Huang@garmin.com> References: <20210504182259.5042-1-Joseph.Huang@garmin.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-ClientProxiedBy: OLAWPA-EXMB2.ad.garmin.com (10.5.144.24) To OLAWPA-EXMB4.ad.garmin.com (10.5.144.25) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 55dd95ce-3845-4e18-4f60-08d90f29b5f6 X-MS-TrafficTypeDiagnostic: CO6PR04MB7747: X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:7219; X-MS-Exchange-SenderADCheck: 1 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:204.77.163.244;CTRY:US;LANG:en;SCL:1;SRV:;IPV:CAL;SFV:NSPM;H:edgetransport.garmin.com;PTR:extedge.garmin.com;CAT:NONE;SFS:(396003)(136003)(39860400002)(346002)(376002)(46966006)(36840700001)(36756003)(8676002)(2906002)(7696005)(7636003)(110136005)(107886003)(47076005)(5660300002)(70206006)(8936002)(4326008)(86362001)(83380400001)(356005)(478600001)(66574015)(336012)(36860700001)(82310400003)(26005)(82740400003)(2616005)(70586007)(316002)(1076003)(426003)(6666004)(186003);DIR:OUT;SFP:1102; X-OriginatorOrg: garmin.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 04 May 2021 18:23:26.9390 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 55dd95ce-3845-4e18-4f60-08d90f29b5f6 X-MS-Exchange-CrossTenant-Id: 38d0d425-ba52-4c0a-a03e-2a65c8e82e2d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=38d0d425-ba52-4c0a-a03e-2a65c8e82e2d;Ip=[204.77.163.244];Helo=[edgetransport.garmin.com] X-MS-Exchange-CrossTenant-AuthSource: DM6NAM10FT005.eop-nam10.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CO6PR04MB7747 X-Proofpoint-GUID: q5A2TvumHL--EkTtLClzzAkS-xBxjDEO X-Proofpoint-ORIG-GUID: q5A2TvumHL--EkTtLClzzAkS-xBxjDEO X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.391,18.0.761 definitions=2021-05-04_12:2021-05-04,2021-05-04 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 priorityscore=1501 mlxscore=0 spamscore=0 adultscore=0 bulkscore=0 phishscore=0 malwarescore=0 impostorscore=0 mlxlogscore=999 clxscore=1015 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2104060000 definitions=main-2105040121 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Modify the forwarding path so that IGMPv1/2/MLDv1 Reports are always flooded by br_multicast_flood, regardless of the check done by br_multicast_querier_exists. This patch fixes the problems where after a system boots up, the first couple of Reports are not handled properly in that: 1) the Report from the Host is being flooded (via br_flood) to all bridge ports, and 2) if the mrouter port's mcast_flood is disabled, the Reports received from other hosts will not be forwarded to the Querier. Signed-off-by: Joseph Huang --- net/bridge/br_device.c | 5 +++-- net/bridge/br_input.c | 5 +++-- net/bridge/br_multicast.c | 3 +++ net/bridge/br_private.h | 3 +++ 4 files changed, 12 insertions(+), 4 deletions(-) diff --git a/net/bridge/br_device.c b/net/bridge/br_device.c index e8b626cc6bfd..ff75ba242f38 100644 --- a/net/bridge/br_device.c +++ b/net/bridge/br_device.c @@ -88,8 +88,9 @@ netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev) } mdst = br_mdb_get(br, skb, vid); - if ((mdst || BR_INPUT_SKB_CB_MROUTERS_ONLY(skb)) && - br_multicast_querier_exists(br, eth_hdr(skb), mdst)) + if (((mdst || BR_INPUT_SKB_CB_MROUTERS_ONLY(skb)) && + br_multicast_querier_exists(br, eth_hdr(skb), mdst)) || + BR_INPUT_SKB_CB_FORCE_MC_FLOOD(skb)) br_multicast_flood(mdst, skb, false, true); else br_flood(br, skb, BR_PKT_MULTICAST, false, true); diff --git a/net/bridge/br_input.c b/net/bridge/br_input.c index 8875e953ac53..572d7f20477f 100644 --- a/net/bridge/br_input.c +++ b/net/bridge/br_input.c @@ -129,8 +129,9 @@ int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb switch (pkt_type) { case BR_PKT_MULTICAST: mdst = br_mdb_get(br, skb, vid); - if ((mdst || BR_INPUT_SKB_CB_MROUTERS_ONLY(skb)) && - br_multicast_querier_exists(br, eth_hdr(skb), mdst)) { + if (((mdst || BR_INPUT_SKB_CB_MROUTERS_ONLY(skb)) && + br_multicast_querier_exists(br, eth_hdr(skb), mdst)) || + BR_INPUT_SKB_CB_FORCE_MC_FLOOD(skb)) { if ((mdst && mdst->host_joined) || br_multicast_is_router(br)) { local_rcv = true; diff --git a/net/bridge/br_multicast.c b/net/bridge/br_multicast.c index b7d9c491abe0..dfdbe19f3e93 100644 --- a/net/bridge/br_multicast.c +++ b/net/bridge/br_multicast.c @@ -3231,6 +3231,7 @@ static int br_multicast_ipv4_rcv(struct net_bridge *br, case IGMP_HOST_MEMBERSHIP_REPORT: case IGMPV2_HOST_MEMBERSHIP_REPORT: BR_INPUT_SKB_CB(skb)->mrouters_only = 1; + BR_INPUT_SKB_CB(skb)->force_mc_flood = 1; err = br_ip4_multicast_add_group(br, port, ih->group, vid, src, true); break; @@ -3294,6 +3295,7 @@ static int br_multicast_ipv6_rcv(struct net_bridge *br, case ICMPV6_MGM_REPORT: src = eth_hdr(skb)->h_source; BR_INPUT_SKB_CB(skb)->mrouters_only = 1; + BR_INPUT_SKB_CB(skb)->force_mc_flood = 1; err = br_ip6_multicast_add_group(br, port, &mld->mld_mca, vid, src, true); break; @@ -3325,6 +3327,7 @@ int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port, BR_INPUT_SKB_CB(skb)->igmp = 0; BR_INPUT_SKB_CB(skb)->mrouters_only = 0; BR_INPUT_SKB_CB(skb)->force_flood = 0; + BR_INPUT_SKB_CB(skb)->force_mc_flood = 0; if (!br_opt_get(br, BROPT_MULTICAST_ENABLED)) return 0; diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h index 59af599d48eb..6d4f20d7f482 100644 --- a/net/bridge/br_private.h +++ b/net/bridge/br_private.h @@ -492,6 +492,7 @@ struct br_input_skb_cb { u8 igmp; u8 mrouters_only:1; u8 force_flood:1; + u8 force_mc_flood:1; #endif u8 proxyarp_replied:1; u8 src_port_isolated:1; @@ -512,9 +513,11 @@ struct br_input_skb_cb { #ifdef CONFIG_BRIDGE_IGMP_SNOOPING # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only) # define BR_INPUT_SKB_CB_FORCE_FLOOD(__skb) (BR_INPUT_SKB_CB(__skb)->force_flood) +# define BR_INPUT_SKB_CB_FORCE_MC_FLOOD(__skb) (BR_INPUT_SKB_CB(__skb)->force_mc_flood) #else # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0) # define BR_INPUT_SKB_CB_FORCE_FLOOD(__skb) (0) +# define BR_INPUT_SKB_CB_FORCE_MC_FLOOD(__skb) (0) #endif #define br_printk(level, br, format, args...) \ -- 2.17.1