From patchwork Thu Nov 23 13:45:44 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hangbin Liu X-Patchwork-Id: 13466264 X-Patchwork-Delegate: kuba@kernel.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="G6AzjiG1" Received: from mail-pg1-x536.google.com (mail-pg1-x536.google.com [IPv6:2607:f8b0:4864:20::536]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BAA8DBA for ; Thu, 23 Nov 2023 05:46:10 -0800 (PST) Received: by mail-pg1-x536.google.com with SMTP id 41be03b00d2f7-5ab94fc098cso571175a12.1 for ; Thu, 23 Nov 2023 05:46:10 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1700747169; x=1701351969; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=L0qJj1M3ZdyRt4degVRP2QOxLdMMGTddypknWJZNaeY=; b=G6AzjiG1fJkTke4zUIIhFj6nTlSlmhh/9uYI6Y8lMhKDfPVhmZURgik3/qurzt/TzI MEfmTk9Ea/6KjBx243QdKEnAFqgqqjjxnify99eCGJuoqfThtvL8JsvZhXUTTA6PNzU5 YSnxtpMXQB3mMFvST3o6R8IUnmxgQWkiuOlwmESIizEJHj4TvGTy0rBaYa9ZWgbXqVy1 1dcM24qcjVYYO5ES4s4GsXJX/b9Rf2+kb0sPkz3QdT9bqVHkPXrNENtbfAmFs5qbM4FD AslPB0bGZr0N4pQPZbzhHgf421GWH/sQl4UlmEm3nKRRSu6DoG9WFVsU3Bf8VoQCoi5y ytCw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1700747169; x=1701351969; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=L0qJj1M3ZdyRt4degVRP2QOxLdMMGTddypknWJZNaeY=; b=r5pOnn4UXVVq92jnvKR2bMNymggha+SAWcCX8TUCnmflTiGWVk9HKeWvnbzR3KimlE 4xxWG2mHqoxXAbdNTg8dV/Wti7hJ4N4WdCeDVBsers2hQVO4d96V+jxeEW4evmkBrPrQ 372SEqDcIGLUT6RiYnktg4LZZUYAcszUAlu1pg/P6jYWWOJSYr6AHE1R++yqQbJ2+mWM ll/DBKAxeOuuwgkKK8QOzBV1hOAGijBHtbjoHn9iCaYCjQ2rLf8KztCFWXjMT7OYP8JY RIM4lNRSG8O2Nwptx4Zr2D179pNMhY3SWDVGxa6+YMlSk/uNnJNUKPO6Xuw1Ug49l72Q nqRA== X-Gm-Message-State: AOJu0Ywud+z8GkPbaPsa+ZUQPjZ7L01oJ0fl275tQnTLIU5C8C7xqti0 P7Rsey9wRXWI4T0twjGWFZS8/BpxuB4pD4s5 X-Google-Smtp-Source: AGHT+IEhC0W6R2+7Iw+QiGRwprEiOxOSr/6c+5WeUxsbJ1a/W8m9WmvjdsU/3aERC1/FvWi1L7Ir7w== X-Received: by 2002:a17:90b:4f4d:b0:285:565b:1d2a with SMTP id pj13-20020a17090b4f4d00b00285565b1d2amr2893487pjb.4.1700747169467; Thu, 23 Nov 2023 05:46:09 -0800 (PST) Received: from Laptop-X1.redhat.com ([43.228.180.230]) by smtp.gmail.com with ESMTPSA id 29-20020a17090a195d00b0028328057c67sm1414210pjh.45.2023.11.23.05.46.04 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 23 Nov 2023 05:46:08 -0800 (PST) From: Hangbin Liu To: netdev@vger.kernel.org Cc: "David S . Miller" , David Ahern , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Ido Schimmel , Nikolay Aleksandrov , Roopa Prabhu , Stephen Hemminger , Florian Westphal , Andrew Lunn , Florian Fainelli , Vladimir Oltean , Jiri Pirko , Marc Muehlfeld , Hangbin Liu Subject: [PATCHv2 net-next 01/10] net: bridge: add document for IFLA_BR enum Date: Thu, 23 Nov 2023 21:45:44 +0800 Message-ID: <20231123134553.3394290-2-liuhangbin@gmail.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20231123134553.3394290-1-liuhangbin@gmail.com> References: <20231123134553.3394290-1-liuhangbin@gmail.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Patchwork-Delegate: kuba@kernel.org Add document for IFLA_BR enum so we can use it in Documentation/networking/bridge.rst. Signed-off-by: Hangbin Liu --- include/uapi/linux/if_link.h | 279 +++++++++++++++++++++++++++++++++++ 1 file changed, 279 insertions(+) diff --git a/include/uapi/linux/if_link.h b/include/uapi/linux/if_link.h index 8181ef23a7a2..a2973c71c158 100644 --- a/include/uapi/linux/if_link.h +++ b/include/uapi/linux/if_link.h @@ -461,6 +461,285 @@ enum in6_addr_gen_mode { /* Bridge section */ +/** + * DOC: Bridge enum definition + * + * please *note* that the timer values in the following section are expected + * in clock_t format, which is seconds multiplied by USER_HZ (generally + * defined as 100). + * + * @IFLA_BR_FORWARD_DELAY + * The bridge forwarding delay is the time spent in LISTENING state + * (before moving to LEARNING) and in LEARNING state (before moving + * to FORWARDING). Only relevant if STP is enabled. + * + * The valid values are between (2 * USER_HZ) and (30 * USER_HZ). + * The default value is (15 * USER_HZ). + * + * @IFLA_BR_HELLO_TIME + * The time between hello packets sent by the bridge, when it is a root + * bridge or a designated bridge. Only relevant if STP is enabled. + * + * The valid values are between (1 * USER_HZ) and (10 * USER_HZ). + * The default value is (2 * USER_HZ). + * + * @IFLA_BR_MAX_AGE + * The hello packet timeout is the time until another bridge in the + * spanning tree is assumed to be dead, after reception of its last hello + * message. Only relevant if STP is enabled. + * + * The valid values are between (6 * USER_HZ) and (40 * USER_HZ). + * The default value is (20 * USER_HZ). + * + * @IFLA_BR_AGEING_TIME + * Configure the bridge's FDB entries aging time. It is the time a MAC + * address will be kept in the FDB after a packet has been received from + * that address. After this time has passed, entries are cleaned up. + * Allow values outside the 802.1 standard specification for special cases: + * + * * 0 - entry never ages (all permanent) + * * 1 - entry disappears (no persistence) + * + * The default value is (300 * USER_HZ). + * + * @IFLA_BR_STP_STATE + * Turn spanning tree protocol on (*IFLA_BR_STP_STATE* > 0) or off + * (*IFLA_BR_STP_STATE* == 0) for this bridge. + * + * The default value is 0 (disabled). + * + * @IFLA_BR_PRIORITY + * set this bridge's spanning tree priority, used during STP root bridge + * election. + * + * The valid values are between 0 and 65535. + * + * @IFLA_BR_VLAN_FILTERING + * Turn VLAN filtering on (*IFLA_BR_VLAN_FILTERING* > 0) or off + * (*IFLA_BR_VLAN_FILTERING* == 0). When disabled, the bridge will not + * consider the VLAN tag when handling packets. + * + * The default value is 0 (disabled). + * + * @IFLA_BR_VLAN_PROTOCOL + * Set the protocol used for VLAN filtering. + * + * The valid values are 0x8100(802.1Q) or 0x88A8(802.1AD). The default value + * is 0x8100(802.1Q). + * + * @IFLA_BR_GROUP_FWD_MASK + * The group forwarding mask. This is the bitmask that is applied to + * decide whether to forward incoming frames destined to link-local + * addresses (of the form 01:80:C2:00:00:0X). + * + * The default value is 0, which means the bridge does not forward any + * link-local frames coming on this port. + * + * @IFLA_BR_ROOT_ID + * The bridge root id, read only. + * + * @IFLA_BR_BRIDGE_ID + * The bridge id, read only. + * + * @IFLA_BR_ROOT_PORT + * The bridge root port, read only. + * + * @IFLA_BR_ROOT_PATH_COST + * The bridge root path cost, read only. + * + * @IFLA_BR_TOPOLOGY_CHANGE + * The bridge topology change, read only. + * + * @IFLA_BR_TOPOLOGY_CHANGE_DETECTED + * The bridge topology change detected, read only. + * + * @IFLA_BR_HELLO_TIMER + * The bridge hello timer, read only. + * + * @IFLA_BR_TCN_TIMER + * The bridge tcn timer, read only. + * + * @IFLA_BR_TOPOLOGY_CHANGE_TIMER + * The bridge topology change timer, read only. + * + * @IFLA_BR_GC_TIMER + * The bridge gc timer, read only. + * + * @IFLA_BR_GROUP_ADDR + * set the MAC address of the multicast group this bridge uses for STP. + * The address must be a link-local address in standard Ethernet MAC address + * format. It is an address of the form 01:80:C2:00:00:0X, with X in [0, 4..f]. + * + * The default value is 0. + * + * @IFLA_BR_FDB_FLUSH + * Flush bridge's fdb dynamic entries. + * + * @IFLA_BR_MCAST_ROUTER + * Set bridge's multicast router if IGMP snooping is enabled. + * The valid values are: + * + * * 0 - disabled. + * * 1 - automatic (queried). + * * 2 - permanently enabled. + * + * The default value is 1. + * + * @IFLA_BR_MCAST_SNOOPING + * Turn multicast snooping on (*IFLA_BR_MCAST_SNOOPING* > 0) or off + * (*IFLA_BR_MCAST_SNOOPING* == 0). + * + * The default value is 1. + * + * @IFLA_BR_MCAST_QUERY_USE_IFADDR + * whether to use the bridge's own IP address as source address for IGMP + * queries (*IFLA_BR_MCAST_QUERY_USE_IFADDR* > 0) or the default of 0.0.0.0 + * (*IFLA_BR_MCAST_QUERY_USE_IFADDR* == 0). + * + * The default value is 0. + * + * @IFLA_BR_MCAST_QUERIER + * Enable (*IFLA_BR_MULTICAST_QUERIER* > 0) or disable + * (*IFLA_BR_MULTICAST_QUERIER* == 0) IGMP querier, ie sending of multicast + * queries by the bridge. + * + * The default value is 0 (disabled). + * + * @IFLA_BR_MCAST_HASH_ELASTICITY + * Set multicast database hash elasticity, It is the maximum chain length in + * the multicast hash table. This attribute is *deprecated* and the value + * is always 16. + * + * @IFLA_BR_MCAST_HASH_MAX + * Set maximum size of the multicast hash table + * + * The default value is 4096, the value must be a power of 2. + * + * @IFLA_BR_MCAST_LAST_MEMBER_CNT + * The Last Member Query Count is the number of Group-Specific Queries + * sent before the router assumes there are no local members. The Last + * Member Query Count is also the number of Group-and-Source-Specific + * Queries sent before the router assumes there are no listeners for a + * particular source. + * + * The default value is 2. + * + * @IFLA_BR_MCAST_STARTUP_QUERY_CNT + * The Startup Query Count is the number of Queries sent out on startup, + * separated by the Startup Query Interval. + * + * The default value is 2. + * + * @IFLA_BR_MCAST_LAST_MEMBER_INTVL + * The Last Member Query Interval is the Max Response Time inserted into + * Group-Specific Queries sent in response to Leave Group messages, and + * is also the amount of time between Group-Specific Query messages. + * + * The default value is (1 * USER_HZ). + * + * @IFLA_BR_MCAST_MEMBERSHIP_INTVL + * The interval after which the bridge will leave a group, if no membership + * reports for this group are received. + * + * The default value is (260 * USER_HZ). + * + * @IFLA_BR_MCAST_QUERIER_INTVL + * The interval between queries sent by other routers. if no queries are + * seen after this delay has passed, the bridge will start to send its own + * queries (as if **IFLA_BR_MCAST_QUERIER_INTVL** was enabled). + * + * The default value is (255 * USER_HZ). + * + * @IFLA_BR_MCAST_QUERY_INTVL + * The Query Interval is the interval between General Queries sent by + * the Querier. + * + * The default value is (125 * USER_HZ). The minimum value is (1 * USER_HZ). + * + * @IFLA_BR_MCAST_QUERY_RESPONSE_INTVL + * The Max Response Time used to calculate the Max Resp Code inserted + * into the periodic General Queries. + * + * The default value is (10 * USER_HZ). + * + * @IFLA_BR_MCAST_STARTUP_QUERY_INTVL + * The interval between queries in the startup phase. + * + * The default value is (125 * USER_HZ) / 4. The minimum value is (1 * USER_HZ). + * + * @IFLA_BR_NF_CALL_IPTABLES + * Enable (*NF_CALL_IPTABLES* > 0) or disable (*NF_CALL_IPTABLES* == 0) + * iptables hooks on the bridge. + * + * The default value is 0 (disabled). + * + * @IFLA_BR_NF_CALL_IP6TABLES + * Enable (*NF_CALL_IP6TABLES* > 0) or disable (*NF_CALL_IP6TABLES* == 0) + * ip6tables hooks on the bridge. + * + * The default value is 0 (disabled). + * + * @IFLA_BR_NF_CALL_ARPTABLES + * Enable (*NF_CALL_ARPTABLES* > 0) or disable (*NF_CALL_ARPTABLES* == 0) + * arptables hooks on the bridge. + * + * The default value is 0 (disabled). + * + * @IFLA_BR_VLAN_DEFAULT_PVID + * VLAN ID applied to untagged and priority-tagged incoming packets. + * + * The default value is 1. Set to the special value 0 makes all ports of + * this bridge not have a PVID by default, which means that they will + * not accept VLAN-untagged traffic. + * + * @IFLA_BR_PAD + * Bridge attribute padding type for netlink message. + * + * @IFLA_BR_VLAN_STATS_ENABLED + * Enable (*IFLA_BR_VLAN_STATS_ENABLED* == 1) or disable + * (*IFLA_BR_VLAN_STATS_ENABLED* == 0) per-VLAN stats accounting. + * + * The default value is 0 (disabled). + * + * @IFLA_BR_MCAST_STATS_ENABLED + * Enable (*IFLA_BR_MCAST_STATS_ENABLED* > 0) or disable + * (*IFLA_BR_MCAST_STATS_ENABLED* == 0) multicast (IGMP/MLD) stats + * accounting. + * + * The default value is 0 (disabled). + * + * @IFLA_BR_MCAST_IGMP_VERSION + * Set the IGMP version. + * + * The valid values are 2 and 3. The default value is 2. + * + * @IFLA_BR_MCAST_MLD_VERSION + * Set the MLD version. + * + * The valid values are 1 and 2. The default value is 1. + * + * @IFLA_BR_VLAN_STATS_PER_PORT + * Enable (*IFLA_BR_VLAN_STATS_PER_PORT* == 1) or disable + * (*IFLA_BR_VLAN_STATS_PER_PORT* == 0) per-VLAN per-port stats accounting. + * Can be changed only when there are no port VLANs configured. + * + * The default value is 0 (disabled). + * + * @IFLA_BR_MULTI_BOOLOPT + * The multi_boolopt is used to control new boolean options to avoid adding + * new netlink attributes. + * + * @IFLA_BR_MCAST_QUERIER_STATE + * Bridge mcast querier states, read only. + * + * @IFLA_BR_FDB_N_LEARNED + * The number of dynamically learned FDB entries for the current bridge, + * read only. + * + * @IFLA_BR_FDB_MAX_LEARNED + * Set the number of max dynamically learned FDB entries for the current + * bridge. + */ enum { IFLA_BR_UNSPEC, IFLA_BR_FORWARD_DELAY, From patchwork Thu Nov 23 13:45:45 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hangbin Liu X-Patchwork-Id: 13466265 X-Patchwork-Delegate: kuba@kernel.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="h8G4lcfa" Received: from mail-pg1-x534.google.com (mail-pg1-x534.google.com [IPv6:2607:f8b0:4864:20::534]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E8378C1 for ; Thu, 23 Nov 2023 05:46:15 -0800 (PST) Received: by mail-pg1-x534.google.com with SMTP id 41be03b00d2f7-5c2066accc5so628015a12.3 for ; Thu, 23 Nov 2023 05:46:15 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1700747174; x=1701351974; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=12YdrEW7IM3AA5J2Lo2FDZOXzD74/H+POuAgiA3H1OY=; b=h8G4lcfa4yxDP0Axg5Dflc7PBF7WBqa79c8xO7Wctw1XqiJtn+s38uwJeFB9ehoo+g tHUJ/dB4ImlVxJy8PnR+fWs1EN9zEDak8HFyOx1pkV6Y0HTEOmJGo7ktrMEUcP0IL/KC ZtBM5pnbzsCYWE4Z0jHU3JZYJ927ykH6qftXOaPmVMHNd6XDlWc/bRFu05eCWtzDvCAI IsjupEj72vO/MCwvBeRweEwEVkYoAfcjAoZ/A8B6GwJ/gKCYhWl54U/feoYXqEY7XS4H xKHTnhcx58Q2vjjE0UKLSdq9eKsGFibOWVWF+Y8lnCZ82beKhm4QAqiPV/iE5gzKwoPR iXQw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1700747174; x=1701351974; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=12YdrEW7IM3AA5J2Lo2FDZOXzD74/H+POuAgiA3H1OY=; b=J5n9y929NQqAN6Go6D64E1xE76cG+yzbysjDaYt708Wi91nZUOwGsFyeXqluKPa/56 20kyGpg5sGwn98tqgdCVLcu6OLuKUL/HGM3PFtopLtBPjVdr9nx8MWbHry6jhsZd341v 8gih18Q1yv08Cf0TEEvkscvIpr2ZQE9nxJKakokD6UxbRzEpELNYDFPZgciMnUUgL+wf aeCWC2ifIMxXJgc+w54Equw4pVwA1MZma5HsaY69eUXEEMy7woK+5Jn/ZRch0YZXMW9K ub+yIuFi/uE7PrWOa/1mkNPOk+fnmq7HdawFXZAq0d7d3lIkQJgzeSFinTdcTyGvw9dm x7Ng== X-Gm-Message-State: AOJu0Yy1vZUqCNcKgPzYntMk8oLR/T8agnFezLF+ebMqLJ2wbbgUP4JM JjC1FSwHkv0K7/TjBdOEsVGq2Ky6HbH6Gy1d X-Google-Smtp-Source: AGHT+IHQnjIVyKQjQ7VFFwMDRff92XvE9S7tnVMU1FZUpZWkyWvaK3LWZVM2/XDVKh5iyErdtoYbmw== X-Received: by 2002:a17:90b:3014:b0:280:2652:d4e with SMTP id hg20-20020a17090b301400b0028026520d4emr5677173pjb.29.1700747174495; Thu, 23 Nov 2023 05:46:14 -0800 (PST) Received: from Laptop-X1.redhat.com ([43.228.180.230]) by smtp.gmail.com with ESMTPSA id 29-20020a17090a195d00b0028328057c67sm1414210pjh.45.2023.11.23.05.46.09 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 23 Nov 2023 05:46:13 -0800 (PST) From: Hangbin Liu To: netdev@vger.kernel.org Cc: "David S . Miller" , David Ahern , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Ido Schimmel , Nikolay Aleksandrov , Roopa Prabhu , Stephen Hemminger , Florian Westphal , Andrew Lunn , Florian Fainelli , Vladimir Oltean , Jiri Pirko , Marc Muehlfeld , Hangbin Liu Subject: [PATCHv2 net-next 02/10] net: bridge: add document for IFLA_BRPORT enum Date: Thu, 23 Nov 2023 21:45:45 +0800 Message-ID: <20231123134553.3394290-3-liuhangbin@gmail.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20231123134553.3394290-1-liuhangbin@gmail.com> References: <20231123134553.3394290-1-liuhangbin@gmail.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Patchwork-Delegate: kuba@kernel.org Add document for IFLA_BRPORT enum so we can use it in Documentation/networking/bridge.rst. Signed-off-by: Hangbin Liu --- include/uapi/linux/if_link.h | 241 +++++++++++++++++++++++++++++++++++ 1 file changed, 241 insertions(+) diff --git a/include/uapi/linux/if_link.h b/include/uapi/linux/if_link.h index a2973c71c158..7eba6280406b 100644 --- a/include/uapi/linux/if_link.h +++ b/include/uapi/linux/if_link.h @@ -801,11 +801,252 @@ struct ifla_bridge_id { __u8 addr[6]; /* ETH_ALEN */ }; +/** + * DOC: Bridge mode enum definition + * + * @BRIDGE_MODE_HAIRPIN + * Controls whether traffic may be send back out of the port on which it + * was received. This option is also called reflective relay mode, and is + * used to support basic VEPA (Virtual Ethernet Port Aggregator) + * capabilities. By default, this flag is turned off and the bridge will + * not forward traffic back out of the receiving port. + */ enum { BRIDGE_MODE_UNSPEC, BRIDGE_MODE_HAIRPIN, }; +/** + * DOC: Bridge port enum definition + * + * @IFLA_BRPORT_STATE + * The operation state of the port. Here are the valid values. + * + * * 0 - port is in STP *DISABLED* state. Make this port completely + * inactive for STP. This is also called BPDU filter and could be used + * to disable STP on an untrusted port, like a leaf virtual device. + * The traffic forwarding is also stopped on this port. + * * 1 - port is in STP *LISTENING* state. Only valid if STP is enabled + * on the bridge. In this state the port listens for STP BPDUs and + * drops all other traffic frames. + * * 2 - port is in STP *LEARNING* state. Only valid if STP is enabled on + * the bridge. In this state the port will accept traffic only for the + * purpose of updating MAC address tables. + * * 3 - port is in STP *FORWARDING* state. Port is fully active. + * * 4 - port is in STP *BLOCKING* state. Only valid if STP is enabled on + * the bridge. This state is used during the STP election process. + * In this state, port will only process STP BPDUs. + * + * @IFLA_BRPORT_PRIORITY + * The STP port priority. The valid values are between 0 and 255. + * + * @IFLA_BRPORT_COST + * The STP path cost of the port. The valid values are between 1 and 65535. + * + * @IFLA_BRPORT_MODE + * Set the bridge port mode. See *BRIDGE_MODE_HAIRPIN* for more details. + * + * @IFLA_BRPORT_GUARD + * Controls whether STP BPDUs will be processed by the bridge port. By + * default, the flag is turned off to allow BPDU processing. Turning this + * flag on will disable the bridge port if a STP BPDU packet is received. + * + * If the bridge has Spanning Tree enabled, hostile devices on the network + * may send BPDU on a port and cause network failure. Setting *guard on* + * will detect and stop this by disabling the port. The port will be + * restarted if the link is brought down, or removed and reattached. + * + * @IFLA_BRPORT_PROTECT + * Controls whether a given port is allowed to become a root port or not. + * Only used when STP is enabled on the bridge. By default the flag is off. + * + * This feature is also called root port guard. If BPDU is received from a + * leaf (edge) port, it should not be elected as root port. This could + * be used if using STP on a bridge and the downstream bridges are not fully + * trusted; this prevents a hostile guest from rerouting traffic. + * + * @IFLA_BRPORT_FAST_LEAVE + * This flag allows the bridge to immediately stop multicast traffic + * forwarding on a port that receives an IGMP Leave message. It is only used + * when IGMP snooping is enabled on the bridge. By default the flag is off. + * + * @IFLA_BRPORT_LEARNING + * Controls whether a given port will learn *source* MAC addresses from + * received traffic or not. Also controls whether dynamic FDB entries + * (which can also be added by software) will be refreshed by incoming + * traffic. By default this flag is on. + * + * @IFLA_BRPORT_UNICAST_FLOOD + * Controls whether unicast traffic for which there is no FDB entry will + * be flooded towards this port. By default this flag is on. + * + * @IFLA_BRPORT_PROXYARP + * Enable proxy ARP on this port. + * + * @IFLA_BRPORT_LEARNING_SYNC + * Controls whether a given port will sync MAC addresses learned on device + * port to bridge FDB. + * + * @IFLA_BRPORT_PROXYARP_WIFI + * Enable proxy ARP on this port which meets extended requirements by + * IEEE 802.11 and Hotspot 2.0 specifications. + * + * @IFLA_BRPORT_ROOT_ID + * + * @IFLA_BRPORT_BRIDGE_ID + * + * @IFLA_BRPORT_DESIGNATED_PORT + * + * @IFLA_BRPORT_DESIGNATED_COST + * + * @IFLA_BRPORT_ID + * + * @IFLA_BRPORT_NO + * + * @IFLA_BRPORT_TOPOLOGY_CHANGE_ACK + * + * @IFLA_BRPORT_CONFIG_PENDING + * + * @IFLA_BRPORT_MESSAGE_AGE_TIMER + * + * @IFLA_BRPORT_FORWARD_DELAY_TIMER + * + * @IFLA_BRPORT_HOLD_TIMER + * + * @IFLA_BRPORT_FLUSH + * Flush bridge ports' fdb dynamic entries. + * + * @IFLA_BRPORT_MULTICAST_ROUTER + * Configure the port's multicast router presence. A port with + * a multicast router will receive all multicast traffic. + * The valid values are: + * + * * 0 disable multicast routers on this port + * * 1 let the system detect the presence of routers (default) + * * 2 permanently enable multicast traffic forwarding on this port + * * 3 enable multicast routers temporarily on this port, not depending + * on incoming queries. + * + * @IFLA_BRPORT_PAD + * + * @IFLA_BRPORT_MCAST_FLOOD + * Controls whether a given port will flood multicast traffic for which + * there is no MDB entry. By default this flag is on. + * + * @IFLA_BRPORT_MCAST_TO_UCAST + * Controls whether a given port will replicate packets using unicast + * instead of multicast. By default this flag is off. + * + * This is done by copying the packet per host and changing the multicast + * destination MAC to a unicast one accordingly. + * + * *mcast_to_unicast* works on top of the multicast snooping feature of the + * bridge. Which means unicast copies are only delivered to hosts which + * are interested in unicast and signaled this via IGMP/MLD reports previously. + * + * This feature is intended for interface types which have a more reliable + * and/or efficient way to deliver unicast packets than broadcast ones + * (e.g. WiFi). + * + * However, it should only be enabled on interfaces where no IGMPv2/MLDv1 + * report suppression takes place. IGMP/MLD report suppression issue is + * usually overcome by the network daemon (supplicant) enabling AP isolation + * and by that separating all STAs. + * + * Delivery of STA-to-STA IP multicast is made possible again by enabling + * and utilizing the bridge hairpin mode, which considers the incoming port + * as a potential outgoing port, too (see *BRIDGE_MODE_HAIRPIN* option). + * Hairpin mode is performed after multicast snooping, therefore leading + * to only deliver reports to STAs running a multicast router. + * + * @IFLA_BRPORT_VLAN_TUNNEL + * Controls whether vlan to tunnel mapping is enabled on the port. + * By default this flag is off. + * + * @IFLA_BRPORT_BCAST_FLOOD + * Controls flooding of broadcast traffic on the given port. By default + * this flag is on. + * + * @IFLA_BRPORT_GROUP_FWD_MASK + * Set the group forward mask. This is a bitmask that is applied to + * decide whether to forward incoming frames destined to link-local + * addresses. The addresses of the form are 01:80:C2:00:00:0X (defaults + * to 0, which means the bridge does not forward any link-local frames + * coming on this port). + * + * @IFLA_BRPORT_NEIGH_SUPPRESS + * Controls whether neighbor discovery (arp and nd) proxy and suppression + * is enabled on the port. By default this flag is off. + * + * @IFLA_BRPORT_ISOLATED + * Controls whether a given port will be isolated, which means it will be + * able to communicate with non-isolated ports only. By default this + * flag is off. + * + * @IFLA_BRPORT_BACKUP_PORT + * Set a backup port. If the port loses carrier all traffic will be + * redirected to the configured backup port. Set the value to 0 to disable + * it. + * + * @IFLA_BRPORT_MRP_RING_OPEN + * + * @IFLA_BRPORT_MRP_IN_OPEN + * + * @IFLA_BRPORT_MCAST_EHT_HOSTS_LIMIT + * The number of per-port EHT hosts limit. The default value is 512. + * Setting to 0 is not allowed. + * + * @IFLA_BRPORT_MCAST_EHT_HOSTS_CNT + * The current number of tracked hosts, read only. + * + * @IFLA_BRPORT_LOCKED + * Controls whether a port will be locked, meaning that hosts behind the + * port will not be able to communicate through the port unless an FDB + * entry with the unit's MAC address is in the FDB. The common use case is + * that hosts are allowed access through authentication with the IEEE 802.1X + * protocol or based on whitelists. By default this flag is off. + * + * Please note that secure 802.1X deployments should always use the + * BR_BOOLOPT_NO_LL_LEARN flag, to not permit the bridge to populate its + * FDB based on link-local (EAPOL) traffic received on the port. + * + * @IFLA_BRPORT_MAB + * Controls whether a port will use MAC Authentication Bypass (MAB), a + * technique through which select MAC addresses may be allowed on a locked + * port, without using 802.1X authentication. Packets with an unknown source + * MAC address generates a "locked" FDB entry on the incoming bridge port. + * The common use case is for user space to react to these bridge FDB + * notifications and optionally replace the locked FDB entry with a normal + * one, allowing traffic to pass for whitelisted MAC addresses. + * + * Setting this flag also requires IFLA_BRPORT_LOCKED and + * IFLA_BRPORT_LEARNING. IFLA_BRPORT_LOCKED ensures that unauthorized data + * packets are dropped, and IFLA_BRPORT_LEARNING allows the dynamic FDB + * entries installed by user space (as replacements for the locked FDB + * entries) to be refreshed and/or aged out. + * + * @IFLA_BRPORT_MCAST_N_GROUPS + * + * @IFLA_BRPORT_MCAST_MAX_GROUPS + * Sets the maximum number of MDB entries that can be registered for a + * given port. Attempts to register more MDB entries at the port than this + * limit allows will be rejected, whether they are done through netlink + * (e.g. the bridge tool), or IGMP or MLD membership reports. Setting a + * limit of 0 disables the limit. The default value is 0. + * + * @IFLA_BRPORT_NEIGH_VLAN_SUPPRESS + * Controls whether neighbor discovery (arp and nd) proxy and suppression is + * enabled for a given port. By default this flag is off. + * + * Note that this option only takes effect when *IFLA_BRPORT_NEIGH_SUPPRESS* + * is enabled for a given port. + * + * @IFLA_BRPORT_BACKUP_NHID + * The FDB nexthop object ID to attach to packets being redirected to a + * backup port that has VLAN tunnel mapping enabled (via the + * *IFLA_BRPORT_VLAN_TUNNEL* option). Setting a value of 0 (default) has + * the effect of not attaching any ID. + */ enum { IFLA_BRPORT_UNSPEC, IFLA_BRPORT_STATE, /* Spanning tree state */ From patchwork Thu Nov 23 13:45:46 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hangbin Liu X-Patchwork-Id: 13466266 X-Patchwork-Delegate: kuba@kernel.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="c4LyyfLh" Received: from mail-pg1-x529.google.com (mail-pg1-x529.google.com [IPv6:2607:f8b0:4864:20::529]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4A453C1 for ; Thu, 23 Nov 2023 05:46:20 -0800 (PST) Received: by mail-pg1-x529.google.com with SMTP id 41be03b00d2f7-5be30d543c4so626521a12.2 for ; Thu, 23 Nov 2023 05:46:20 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1700747179; x=1701351979; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=lPWCqxk9AprKqAWF8SPHWJfK/CG6Gq8Ew1oPyqgSw2Q=; b=c4LyyfLhKZH3/pBX5MBsksigGylWudHVqtP8W/vJt/By5BFWEa1kDR9GhIxygQIHm0 ZB3dDZg/mSk8ld+iBg1AfBt2HKksYhhGadBTCIBO3ZWW9Fb5Q6d3bNymOxIcx7lItT2r NQrMNO3Sk+ZY9zT3yBaLqVMqvzFOvu6c0DsA8mgfmlLR/1am5jJKaE5CJlAA3Ik7YBMR gEONM7+nCqz7BvwgLP7FCuIWmvsjBKUis2MKu3y53jvEVhDD+4NAdvrcKMlbwmZepO40 8Vnc7PxPIYrUbVEFBOgisFgPjWzvPSRyqHL+HzyEKdfqXjOngQD0R5+AEF0jukAjsaVN Xd+g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1700747179; x=1701351979; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=lPWCqxk9AprKqAWF8SPHWJfK/CG6Gq8Ew1oPyqgSw2Q=; b=MZZkRSZHYel6TUd93xwsp0f9xTgGT0uQ5uv89+SdSUXGvnoeGmg2k0XjKg7zj4StRf Rr+zyneeuBjUwW86EzDIquYPOYYDqP/MSz/n6s8dQ9LY4J13dVcHCP6OmsgYOWy5qxrI qfUxqXJE5TyR9jdQFJVwyC+aCvvfKZhvmTFHXHOwPndSPl0AkRRHZfDZ/otCa9+DR1x+ yEN8IDON9l2JMqCn99RRrmXGQD6t7pqHeS3i+XxTCpNBMw9yYfsGgvnHoT6bdE22JSG/ MqynBX4bDZvReysz2eirfjks6ee/I80jhBbPL4BoQaB8VRRNyK5fjq87biDb0VNfXs59 vY3Q== X-Gm-Message-State: AOJu0YwaDReDMK/LkuhNcRnRN0YeTpiwQ90pL9mh4VIZde1nAEBS9U2r Q+pAfrFGkGUdWl+9aXF+yv/YsiwqtYGBsBxS X-Google-Smtp-Source: AGHT+IESZkWFSQ1VyWBf/B/LXgwgINHp8ylasBZFZk47i0SE/sBQqq4UdZPQAT16uXcjSMBRCwt2Xg== X-Received: by 2002:a17:90b:1b07:b0:285:4784:b92a with SMTP id nu7-20020a17090b1b0700b002854784b92amr5400976pjb.1.1700747179173; Thu, 23 Nov 2023 05:46:19 -0800 (PST) Received: from Laptop-X1.redhat.com ([43.228.180.230]) by smtp.gmail.com with ESMTPSA id 29-20020a17090a195d00b0028328057c67sm1414210pjh.45.2023.11.23.05.46.14 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 23 Nov 2023 05:46:18 -0800 (PST) From: Hangbin Liu To: netdev@vger.kernel.org Cc: "David S . Miller" , David Ahern , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Ido Schimmel , Nikolay Aleksandrov , Roopa Prabhu , Stephen Hemminger , Florian Westphal , Andrew Lunn , Florian Fainelli , Vladimir Oltean , Jiri Pirko , Marc Muehlfeld , Hangbin Liu Subject: [PATCHv2 net-next 03/10] net: bridge: add document for bridge sysfs attribute Date: Thu, 23 Nov 2023 21:45:46 +0800 Message-ID: <20231123134553.3394290-4-liuhangbin@gmail.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20231123134553.3394290-1-liuhangbin@gmail.com> References: <20231123134553.3394290-1-liuhangbin@gmail.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Patchwork-Delegate: kuba@kernel.org Although the sysfs interface is deprecated and should not be extended if new options are added. There are still users and admins use this interface to config bridge options. It would help users to know what the meaning of each field. Add correspond netlink enums (as we have document for them) for bridge sysfs attributes, so we can use it in Documentation/networking/bridge.rst. Signed-off-by: Hangbin Liu --- net/bridge/br_sysfs_br.c | 93 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 93 insertions(+) diff --git a/net/bridge/br_sysfs_br.c b/net/bridge/br_sysfs_br.c index ea733542244c..bd9c9b2a7859 100644 --- a/net/bridge/br_sysfs_br.c +++ b/net/bridge/br_sysfs_br.c @@ -933,6 +933,99 @@ static ssize_t vlan_stats_per_port_store(struct device *d, static DEVICE_ATTR_RW(vlan_stats_per_port); #endif +/** + * DOC: Bridge sysfs attributes + * + * @forward_delay: IFLA_BR_FORWARD_DELAY + * + * @hello_time: IFLA_BR_HELLO_TIME + * + * @max_age: IFLA_BR_MAX_AGE + * + * @ageing_time: IFLA_BR_AGEING_TIME + * + * @stp_state: IFLA_BR_STP_STATE + * + * @group_fwd_mask: IFLA_BR_GROUP_FWD_MASK + * + * @priority: IFLA_BR_PRIORITY + * + * @bridge_id: IFLA_BR_BRIDGE_ID + * + * @root_id: IFLA_BR_ROOT_ID + * + * @root_path_cost: IFLA_BR_ROOT_PATH_COST + * + * @root_port: IFLA_BR_ROOT_PORT + * + * @topology_change: IFLA_BR_TOPOLOGY_CHANGE + * + * @topology_change_detected: IFLA_BR_TOPOLOGY_CHANGE_DETECTED + * + * @hello_timer: IFLA_BR_HELLO_TIMER + * + * @tcn_timer: IFLA_BR_TCN_TIMER + * + * @topology_change_timer: IFLA_BR_TOPOLOGY_CHANGE_TIMER + * + * @gc_timer: IFLA_BR_GC_TIMER + * + * @group_addr: IFLA_BR_GROUP_ADDR + * + * @flush: IFLA_BR_FDB_FLUSH + * + * @no_linklocal_learn: BR_BOOLOPT_NO_LL_LEARN + * + * @multicast_router: IFLA_BR_MCAST_ROUTER + * + * @multicast_snooping: IFLA_BR_MCAST_SNOOPING + * + * @multicast_querier: IFLA_BR_MCAST_QUERIER + * + * @multicast_query_use_ifaddr: IFLA_BR_MCAST_QUERY_USE_IFADDR + * + * @hash_elasticity: IFLA_BR_MCAST_HASH_ELASTICITY + * + * @hash_max: IFLA_BR_MCAST_HASH_MAX + * + * @multicast_last_member_count: IFLA_BR_MCAST_LAST_MEMBER_CNT + * + * @multicast_startup_query_count: IFLA_BR_MCAST_STARTUP_QUERY_CNT + * + * @multicast_last_member_interval: IFLA_BR_MCAST_LAST_MEMBER_INTVL + * + * @multicast_membership_interval: IFLA_BR_MCAST_MEMBERSHIP_INTVL + * + * @multicast_querier_interval: IFLA_BR_MCAST_QUERIER_INTVL + * + * @multicast_query_interval: IFLA_BR_MCAST_QUERY_INTVL + * + * @multicast_query_response_interval: IFLA_BR_MCAST_QUERY_RESPONSE_INTVL + * + * @multicast_startup_query_interval: IFLA_BR_MCAST_STARTUP_QUERY_INTVL + * + * @multicast_stats_enabled: IFLA_BR_MCAST_STATS_ENABLED + * + * @multicast_igmp_version: IFLA_BR_MCAST_IGMP_VERSION + * + * @multicast_mld_version: IFLA_BR_MCAST_MLD_VERSION + * + * @nf_call_iptables: IFLA_BR_NF_CALL_IPTABLES + * + * @nf_call_ip6tables: IFLA_BR_NF_CALL_IP6TABLES + * + * @nf_call_arptables: IFLA_BR_NF_CALL_ARPTABLES + * + * @vlan_filtering: IFLA_BR_VLAN_FILTERING + * + * @vlan_protocol: IFLA_BR_VLAN_PROTOCOL + * + * @default_pvid: IFLA_BR_VLAN_DEFAULT_PVID + * + * @vlan_stats_enabled: IFLA_BR_VLAN_STATS_ENABLED + * + * @vlan_stats_per_port: IFLA_BR_VLAN_STATS_PER_PORT + */ static struct attribute *bridge_attrs[] = { &dev_attr_forward_delay.attr, &dev_attr_hello_time.attr, From patchwork Thu Nov 23 13:45:47 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hangbin Liu X-Patchwork-Id: 13466267 X-Patchwork-Delegate: kuba@kernel.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="BxbYqfCR" Received: from mail-pj1-x102f.google.com (mail-pj1-x102f.google.com [IPv6:2607:f8b0:4864:20::102f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1E793C1 for ; Thu, 23 Nov 2023 05:46:25 -0800 (PST) Received: by mail-pj1-x102f.google.com with SMTP id 98e67ed59e1d1-28396255b81so715171a91.0 for ; Thu, 23 Nov 2023 05:46:25 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1700747184; x=1701351984; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=EjIpsKXI3OC/NrpW4LsyvsWGhqOOR0eezUm9Sj+X5y0=; b=BxbYqfCRsAQMhwZ3udraeXOubsMlUi8O4/7cA3unHpK+kHUOoaXjT53c+rzxy2RJ7L oePMGEiYijsY8EN4GGB3FIw7sh0lhnnr5i11PGPrkTLLGuAh9A827WMt5y6wax6jvzmC zl25BksbYe+0EgoMkYzDxSwwQlfuU5ydUqUo9aDXnqm8ojiWGOmqw7S+ozkdHoyGS6gC 6/tR0b3rqqFz59idgXEQQrR65PmCywBV7sHlsl92Lhlkaay9pUjxgymIuVyTqsQTc0Ld LHooP73JTMzquqy8KDCvtFzY03WXbQzk6kVVtTb0wXRjr3wfxv95saDYsAHomzFjY0Hy Qieg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1700747184; x=1701351984; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=EjIpsKXI3OC/NrpW4LsyvsWGhqOOR0eezUm9Sj+X5y0=; b=iI7Z3XJzaOgroklGBrjyPVgwXSuuh6AL37maLOrWLPfeqqqZC+fGtPwUDw9wvG3/ib Rmt24lpbBnJsNgyQaztdYCpzaaufUjX0VP5OeUfa8T0HE3ESNFt9BimdJQI+umexOulO +uC3rTmZYc8u6NnjE0oB6ZpckEc7oWl9gHgcomI0eux75nYK/S9rMw6mwHaFTfZCGWTM K3zEZht+vpB6k2PDRG++FQ3QO5OeexLk61Gyi2aOCUcS4zGZ+RSycRTzywrCamg8yMbA ZpYP+pLK0VzkRyBlioRL2rXk03LNlhwMyPxOk8Yln+qc4xUq6sWsgBX0/kc+pnYFYlC3 Hwlw== X-Gm-Message-State: AOJu0Yz7jGGfaJicjuMQerX5gQyRZwoknXmf0ZEjWCDsbTNmMWB8XltG 6EzGflNjjwbDnybG/3uEz1TIOspcFCTErhUi X-Google-Smtp-Source: AGHT+IGxLjVBl4F5xMDn8ReYmVb8L9MW2/nQFxvN4j9ZsYpaKHjSugCkq4tpjFdJ+ay0k2qQHOn8Bg== X-Received: by 2002:a17:90b:4a45:b0:281:554d:b318 with SMTP id lb5-20020a17090b4a4500b00281554db318mr5242203pjb.39.1700747183883; Thu, 23 Nov 2023 05:46:23 -0800 (PST) Received: from Laptop-X1.redhat.com ([43.228.180.230]) by smtp.gmail.com with ESMTPSA id 29-20020a17090a195d00b0028328057c67sm1414210pjh.45.2023.11.23.05.46.19 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 23 Nov 2023 05:46:23 -0800 (PST) From: Hangbin Liu To: netdev@vger.kernel.org Cc: "David S . Miller" , David Ahern , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Ido Schimmel , Nikolay Aleksandrov , Roopa Prabhu , Stephen Hemminger , Florian Westphal , Andrew Lunn , Florian Fainelli , Vladimir Oltean , Jiri Pirko , Marc Muehlfeld , Hangbin Liu Subject: [PATCHv2 net-next 04/10] docs: bridge: Add kAPI/uAPI fields Date: Thu, 23 Nov 2023 21:45:47 +0800 Message-ID: <20231123134553.3394290-5-liuhangbin@gmail.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20231123134553.3394290-1-liuhangbin@gmail.com> References: <20231123134553.3394290-1-liuhangbin@gmail.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Patchwork-Delegate: kuba@kernel.org The current bridge kernel doc is too old. It only pointed to the linuxfoundation wiki page which lacks of the new features. Here let's start the new bridge document and put all the bridge info so new developers and users could catch up the last bridge status soon. First, add kAPI/uAPI and FAQ fields. These 2 fields are only examples and more APIs need to be added in future. Signed-off-by: Hangbin Liu --- Documentation/networking/bridge.rst | 84 +++++++++++++++++++++++++---- net/bridge/br_private.h | 2 + 2 files changed, 76 insertions(+), 10 deletions(-) diff --git a/Documentation/networking/bridge.rst b/Documentation/networking/bridge.rst index c859f3c1636e..84aae94f6598 100644 --- a/Documentation/networking/bridge.rst +++ b/Documentation/networking/bridge.rst @@ -4,18 +4,82 @@ Ethernet Bridging ================= -In order to use the Ethernet bridging functionality, you'll need the -userspace tools. +Introduction +============ -Documentation for Linux bridging is on: - https://wiki.linuxfoundation.org/networking/bridge +A bridge is a way to connect multiple Ethernet segments together in a protocol +independent way. Packets are forwarded based on Layer 2 destination Ethernet +address, rather than IP address (like a router). Since forwarding is done +at Layer 2, all Layer 3 protocols can pass through a bridge transparently. -The bridge-utilities are maintained at: - git://git.kernel.org/pub/scm/linux/kernel/git/shemminger/bridge-utils.git +Bridge kAPI +=========== -Additionally, the iproute2 utilities can be used to configure -bridge devices. +Here are some core structures of bridge code. -If you still have questions, don't hesitate to post to the mailing list -(more info https://lists.linux-foundation.org/mailman/listinfo/bridge). +.. kernel-doc:: net/bridge/br_private.h + :identifiers: net_bridge_vlan +Bridge uAPI +=========== + +Modern Linux bridge uAPI is accessed via Netlink interface. You can find +below files where the bridge and bridge port netlink attributes are defined. + +Bridge netlink attributes +------------------------- + +.. kernel-doc:: include/uapi/linux/if_link.h + :doc: Bridge enum definition + +Bridge port netlink attributes +------------------------------ + +.. kernel-doc:: include/uapi/linux/if_link.h + :doc: Bridge port enum definition + +Bridge sysfs +------------ + +All sysfs attributes are also exported via the bridge netlink API. +You can find each attribute explanation based on the correspond netlink +attribute. + +NOTE: the sysfs interface is deprecated and should not be extended if new +options are added. + +.. kernel-doc:: net/bridge/br_sysfs_br.c + :doc: Bridge sysfs attributes + +FAQ +=== + +What does a bridge do? +---------------------- + +A bridge transparently forwards traffic between multiple network interfaces. +In plain English this means that a bridge connects two or more physical +Ethernet networks, to form one larger (logical) Ethernet network. + +Is it L3 protocol independent? +------------------------------ + +Yes. The bridge sees all frames, but it *uses* only L2 headers/information. +As such, the bridging functionality is protocol independent, and there should +be no trouble forwarding IPX, NetBEUI, IP, IPv6, etc. + +Contact Info +============ + +The code is currently maintained by Roopa Prabhu and +Nikolay Aleksandrov . Bridge bugs and enhancements +are discussed on the linux-netdev mailing list netdev@vger.kernel.org and +bridge@lists.linux-foundation.org. + +The list is open to anyone interested: http://vger.kernel.org/vger-lists.html#netdev + +External Links +============== + +The old Documentation for Linux bridging is on: +https://wiki.linuxfoundation.org/networking/bridge diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h index 6b7f36769d03..051ea81864ac 100644 --- a/net/bridge/br_private.h +++ b/net/bridge/br_private.h @@ -186,6 +186,7 @@ enum { * struct net_bridge_vlan - per-vlan entry * * @vnode: rhashtable member + * @tnode: rhashtable member * @vid: VLAN id * @flags: bridge vlan flags * @priv_flags: private (in-kernel) bridge vlan flags @@ -196,6 +197,7 @@ enum { * @refcnt: if MASTER flag set, this is bumped for each port referencing it * @brvlan: if MASTER flag unset, this points to the global per-VLAN context * for this VLAN entry + * @tinfo: bridge tunnel info * @br_mcast_ctx: if MASTER flag set, this is the global vlan multicast context * @port_mcast_ctx: if MASTER flag unset, this is the per-port/vlan multicast * context From patchwork Thu Nov 23 13:45:48 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hangbin Liu X-Patchwork-Id: 13466268 X-Patchwork-Delegate: kuba@kernel.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="F5w1wGAR" Received: from mail-pg1-x52d.google.com (mail-pg1-x52d.google.com [IPv6:2607:f8b0:4864:20::52d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id F30A3F9 for ; Thu, 23 Nov 2023 05:46:29 -0800 (PST) Received: by mail-pg1-x52d.google.com with SMTP id 41be03b00d2f7-5c2066accc5so628160a12.3 for ; Thu, 23 Nov 2023 05:46:29 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1700747189; x=1701351989; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=wDbV4TqVpQY3WWJc+DEqiCW2ek6jh/ijW23lPWhz1m0=; b=F5w1wGARnk8pK8thL+m6BvHAsSb4L39tqnGXCOkT/2OopZQ39nbAVblzKSZ1iUkd81 QyUSuoFgVDqoc0hX6BsZ739FJwximEy0/PzLCUwf8KbAtKTkNB/9eR4pDKnlvq6J83v/ 4P5ykSDLBVjde+x/ehLg3N2LNu0ldhtBCtQsjrv8mn34DzhNqXkrnlzkkX/Qr5HorJ2n xbTPuLZVRPI7t4Pklv6Cg+rAY4S7Rz7/S+fEROkJoEkdwW0wwYBcL/PLLOxGbfnzgiPS DhXvxKIBVYtAgVvbK8+hxdoFC52OimO0MgelLy8fgsITy0MHpHyB1EHH5YcAXpdQonSl pv/Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1700747189; x=1701351989; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=wDbV4TqVpQY3WWJc+DEqiCW2ek6jh/ijW23lPWhz1m0=; b=DM9cmgqZ0dIHfI8ni33odmLsc116ToauaGxnC5NX76OOFP/CEn61vPwsx48/U9CDMS ENk598XjycbKtb7+5oRd+WWOthXdxL6E4aV4p+cFuzhsnieurgO5VSQxCjqNL5FF29US JFBiicRKS/TWta3K8uzQt5LhW5JwQF2m0qUdJYjn/aM423nPRhq6qdMRIEFmFfnnlMTc gvwiI6ri5XjLGYyKlZJOKyRUWlw+kN5jE2aLnzdRQycXa+kRks8IdlcD9ZSOYsetCyRV C88GmbBVnwIDqYnGjgRj+U32LOEk3BFWF43YEc0t2U7gSnsDEdie9U5lqnJaP7ZyBs7s KkIw== X-Gm-Message-State: AOJu0Yx9wkuahoUVX3Zz6Cg9Lxt3X8f0R53T+AA5PFycnNCgjGQz3BZ2 94j2wKUQ1557P7wMsdVMvK8vhoyOx81d/zqe X-Google-Smtp-Source: AGHT+IGp2UvAqedWM1WdpELsQ15s9O5ug8vy4pnoOSAQLb/+ttVFrHjRKSJmBrbKzuCjZkj2PDZ0sg== X-Received: by 2002:a17:90a:1951:b0:280:a01a:906a with SMTP id 17-20020a17090a195100b00280a01a906amr5687128pjh.5.1700747188919; Thu, 23 Nov 2023 05:46:28 -0800 (PST) Received: from Laptop-X1.redhat.com ([43.228.180.230]) by smtp.gmail.com with ESMTPSA id 29-20020a17090a195d00b0028328057c67sm1414210pjh.45.2023.11.23.05.46.24 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 23 Nov 2023 05:46:28 -0800 (PST) From: Hangbin Liu To: netdev@vger.kernel.org Cc: "David S . Miller" , David Ahern , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Ido Schimmel , Nikolay Aleksandrov , Roopa Prabhu , Stephen Hemminger , Florian Westphal , Andrew Lunn , Florian Fainelli , Vladimir Oltean , Jiri Pirko , Marc Muehlfeld , Hangbin Liu Subject: [PATCHv2 net-next 05/10] docs: bridge: add STP doc Date: Thu, 23 Nov 2023 21:45:48 +0800 Message-ID: <20231123134553.3394290-6-liuhangbin@gmail.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20231123134553.3394290-1-liuhangbin@gmail.com> References: <20231123134553.3394290-1-liuhangbin@gmail.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Patchwork-Delegate: kuba@kernel.org Add STP part for bridge document. Signed-off-by: Hangbin Liu --- Documentation/networking/bridge.rst | 85 +++++++++++++++++++++++++++++ 1 file changed, 85 insertions(+) diff --git a/Documentation/networking/bridge.rst b/Documentation/networking/bridge.rst index 84aae94f6598..1fd339e48129 100644 --- a/Documentation/networking/bridge.rst +++ b/Documentation/networking/bridge.rst @@ -51,6 +51,91 @@ options are added. .. kernel-doc:: net/bridge/br_sysfs_br.c :doc: Bridge sysfs attributes +STP +=== + +The STP (Spanning Tree Protocol) implementation in the Linux bridge driver +is a critical feature that helps prevent loops and broadcast storms in +Ethernet networks by identifying and disabling redundant links. In a Linux +bridge context, STP is crucial for network stability and availability. + +STP is a Layer 2 protocol that operates at the Data Link Layer of the OSI +model. It was originally developed as IEEE 802.1D and has since evolved into +multiple versions, including Rapid Spanning Tree Protocol (RSTP) and +`Multiple Spanning Tree Protocol (MSTP) +`_. + +Bridge Ports and STP States +--------------------------- + +In the context of STP, bridge ports can be in one of the following states: + * Blocking: The port is disabled for data traffic and only listens for + BPDUs (Bridge Protocol Data Units) from other devices to determine the + network topology. + * Listening: The port begins to participate in the STP process and listens + for BPDUs. + * Learning: The port continues to listen for BPDUs and begins to learn MAC + addresses from incoming frames but does not forward data frames. + * Forwarding: The port is fully operational and forwards both BPDUs and + data frames. + * Disabled: The port is administratively disabled and does not participate + in the STP process. The data frames forwarding are also disabled. + +Root Bridge and Convergence +--------------------------- + +In the context of networking and Ethernet bridging in Linux, the root bridge +is a designated switch in a bridged network that serves as a reference point +for the spanning tree algorithm to create a loop-free topology. + +Here's how the STP works and root bridge is chosen: + 1. Bridge Priority: Each bridge running a spanning tree protocol, has a + configurable Bridge Priority value. The lower the value, the higher the + priority. By default, the Bridge Priority is set to a standard value + (e.g., 32768). + 2. Bridge ID: The Bridge ID is composed of two components: Bridge Priority + and the MAC address of the bridge. It uniquely identifies each bridge + in the network. The Bridge ID is used to compare the priorities of + different bridges. + 3. Bridge Election: When the network starts, all bridges initially assume + that they are the root bridge. They start advertising Bridge Protocol + Data Units (BPDU) to their neighbors, containing their Bridge ID and + other information. + 4. BPDU Comparison: Bridges exchange BPDUs to determine the root bridge. + Each bridge examines the received BPDUs, including the Bridge Priority + and Bridge ID, to determine if it should adjust its own priorities. + The bridge with the lowest Bridge ID will become the root bridge. + 5. Root Bridge Announcement: Once the root bridge is determined, it sends + BPDUs with information about the root bridge to all other bridges in the + network. This information is used by other bridges to calculate the + shortest path to the root bridge and, in doing so, create a loop-free + topology. + 6. Forwarding Ports: After the root bridge is selected and the spanning tree + topology is established, each bridge determines which of its ports should + be in the forwarding state (used for data traffic) and which should be in + the blocking state (used to prevent loops). The root bridge's ports are + all in the forwarding state. while other bridges have some ports in the + blocking state to avoid loops. + 7. Root Ports: After the root bridge is selected and the spanning tree + topology is established, each non-root bridge processes incoming + BPDUs and determines which of its ports provides the shortest path to the + root bridge based on the information in the received BPDUs. This port is + designated as the root port. And it is in the Forwarding state, allowing + it to actively forward network traffic. + 8. Designated ports: A designated port is the port through which the non-root + bridge will forward traffic towards the designated segment. Designated ports + are placed in the Forwarding state. All other ports on the non-root + bridge that are not designated for specific segments are placed in the + Blocking state to prevent network loops. + +STP ensures network convergence by calculating the shortest path and disabling +redundant links. When network topology changes occur (e.g., a link failure), +STP recalculates the network topology to restore connectivity while avoiding loops. + +Proper configuration of STP parameters, such as the bridge priority, can +influence which bridge becomes the Root Bridge. Careful configuration can +optimize network performance and path selection. + FAQ === From patchwork Thu Nov 23 13:45:49 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hangbin Liu X-Patchwork-Id: 13466269 X-Patchwork-Delegate: kuba@kernel.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="gNuAS/y4" Received: from mail-pj1-x1036.google.com (mail-pj1-x1036.google.com [IPv6:2607:f8b0:4864:20::1036]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 17DCBD42 for ; Thu, 23 Nov 2023 05:46:35 -0800 (PST) Received: by mail-pj1-x1036.google.com with SMTP id 98e67ed59e1d1-285196aaecaso791703a91.0 for ; Thu, 23 Nov 2023 05:46:35 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1700747194; x=1701351994; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=m8oUo9C5xcva8KJDqQvql+tezZAPIpLAGnaZWqMceG4=; b=gNuAS/y4XC+na0ZFB3qxdRz7dItiF7DvI5ePNxOlvB6L/6Sm0nP/WLyu/IJbbfFW3a xyBjwZaislCQkA0+r6Bag1XZ+xp3R57tqIzbguNQ6QPg6Kvx2TLxSLVroTahm5MjcSoM 0keyf7g245SAk5tFyENJ+23mUZa5TDifjMjMm567jUA45wqVzcrMeoOFLjhWvxldNmWU McLUle6zN9wxzsZQEJfIq/FKNqLm+7cqRVwkKNW6rV0h2yQIrY1GDPWIpi2XalQDGQm9 KnscLCCirmgYV8uLOEuZ7caA241krQC1GBhzjtWByVB4/DQoB7wRUt5ULLVK2hFaO+dO P5Lw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1700747194; x=1701351994; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=m8oUo9C5xcva8KJDqQvql+tezZAPIpLAGnaZWqMceG4=; b=GZegClyc5sa4xvtO5SVToZF8hAvEvzO5Ag2UjQ6zazfOi0sXgs4+jgiq0gd05eq2yh GIDy9MeAUkkj187xWD4SzyTbzWJ9OeHNFPBPt8/Sj0a+JrENlUQuVqNPKvY6sroRhXSu O0VggkTsRj+GGqb7aKrvIX39xWCD4MQqWSh49b0gjXqtGuRgmrZwUncIH7Yj+EkhUt87 /ZWhlcshNfUlVlR6IfTPmzK5QBJg2B18icHfgHmTzYdIU2i01RTlWsRIdQmOary3g3G5 2RIJtkuc2jkL7sjbmWFoUlzxppwHRGdzNg8pd6iUNUly6CyGulFaBy3fHfRFTD7jpOaF YdQQ== X-Gm-Message-State: AOJu0Yw6RIATrlD0BrTOs8hri7BQVP9tadjXd5nj1PRWSwUOuyW3mTyW F426S8rAqXZQxOjuP//jwhPpt1jpK0fZzscy X-Google-Smtp-Source: AGHT+IEJq5XWKbHo8kngvVlJ8lzWLbh5bOpr1TRYMiCURJJEvv4ijK+Yecb6Hve0+Yzf0UQO8gliRQ== X-Received: by 2002:a17:90a:c:b0:283:2612:714a with SMTP id 12-20020a17090a000c00b002832612714amr5205177pja.36.1700747193759; Thu, 23 Nov 2023 05:46:33 -0800 (PST) Received: from Laptop-X1.redhat.com ([43.228.180.230]) by smtp.gmail.com with ESMTPSA id 29-20020a17090a195d00b0028328057c67sm1414210pjh.45.2023.11.23.05.46.29 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 23 Nov 2023 05:46:33 -0800 (PST) From: Hangbin Liu To: netdev@vger.kernel.org Cc: "David S . Miller" , David Ahern , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Ido Schimmel , Nikolay Aleksandrov , Roopa Prabhu , Stephen Hemminger , Florian Westphal , Andrew Lunn , Florian Fainelli , Vladimir Oltean , Jiri Pirko , Marc Muehlfeld , Hangbin Liu Subject: [PATCHv2 net-next 06/10] docs: bridge: add VLAN doc Date: Thu, 23 Nov 2023 21:45:49 +0800 Message-ID: <20231123134553.3394290-7-liuhangbin@gmail.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20231123134553.3394290-1-liuhangbin@gmail.com> References: <20231123134553.3394290-1-liuhangbin@gmail.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Patchwork-Delegate: kuba@kernel.org Add VLAN part for bridge document. Signed-off-by: Hangbin Liu Acked-by: Nikolay Aleksandrov --- Documentation/networking/bridge.rst | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) diff --git a/Documentation/networking/bridge.rst b/Documentation/networking/bridge.rst index 1fd339e48129..f70f42ab7396 100644 --- a/Documentation/networking/bridge.rst +++ b/Documentation/networking/bridge.rst @@ -136,6 +136,35 @@ Proper configuration of STP parameters, such as the bridge priority, can influence which bridge becomes the Root Bridge. Careful configuration can optimize network performance and path selection. +VLAN +==== + +A LAN (Local Area Network) is a network that covers a small geographic area, +typically within a single building or a campus. LANs are used to connect +computers, servers, printers, and other networked devices within a localized +area. LANs can be wired (using Ethernet cables) or wireless (using Wi-Fi). + +A VLAN (Virtual Local Area Network) is a logical segmentation of a physical +network into multiple isolated broadcast domains. VLANs are used to divide +a single physical LAN into multiple virtual LANs, allowing different groups of +devices to communicate as if they were on separate physical networks. + +Typically there are two VLAN implementations, IEEE 802.1Q and IEEE 802.1ad +(also known as QinQ). IEEE 802.1Q is a standard for VLAN tagging in Ethernet +networks. It allows network administrators to create logical VLANs on a +physical network and tag Ethernet frames with VLAN information, which is +called *VLAN-tagged frames*. IEEE 802.1ad, commonly known as QinQ or Double +VLAN, is an extension of the IEEE 802.1Q standard. QinQ allows for the +stacking of multiple VLAN tags within a single Ethernet frame. The Linux +bridge supports both the IEEE 802.1Q and `802.1AD +`_ +protocol for VLAN tagging. + +`VLAN filtering `_ +on a bridge is disabled by default. After enabling VLAN filtering on a bridge, +it will start forwarding frames to appropriate destinations based on their +destination MAC address and VLAN tag (both must match). + FAQ === From patchwork Thu Nov 23 13:45:50 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hangbin Liu X-Patchwork-Id: 13466270 X-Patchwork-Delegate: kuba@kernel.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="Thl1G8b1" Received: from mail-pj1-x1030.google.com (mail-pj1-x1030.google.com [IPv6:2607:f8b0:4864:20::1030]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 551C2D42 for ; Thu, 23 Nov 2023 05:46:39 -0800 (PST) Received: by mail-pj1-x1030.google.com with SMTP id 98e67ed59e1d1-285636785ddso513258a91.3 for ; Thu, 23 Nov 2023 05:46:39 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1700747198; x=1701351998; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=9Vo75FcuvNVlq4TjmwAxJVAawHxP5B8FdSellSWuvng=; b=Thl1G8b1PoEMJV2XI0c/Rfo+G7KvKW35l6IGDWW3WvAf1OSTMbI0GKFz385l6lHlnX IqvPG3wH8E19JQPYGsgPweOwmZ4jAXfDLiru0anLYVYXB0etVsxmjv30a5cx8pZ+AZiz HM1phn81O0Lp/apyXoLdnSPi8tO5RJML/c5fFKoZW1eNC66r6/Umik50ow/WW42LGXPz KYcccQGC6p9D0HAdt5PJcfH8wjjP8hjibnbydKbJnk+2kEcywYOdQxLO6pkbCCdawpWV FMJ9E6AMByVEcXBuh6lBZtsfomzJ9Lx1WOjJEUdRfRdbstXGND+Zha1iuDYnu/KKrMJA dCzA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1700747198; x=1701351998; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=9Vo75FcuvNVlq4TjmwAxJVAawHxP5B8FdSellSWuvng=; b=R9A8qimN/Zb49Uwsl1M9BMOIeN0t25V0dHQ1r02xbwD9cQgFKUIEB+PLd57NBf3hdJ bovLFLb+RcdMpn1DfDXAa8mctGUenBhyhE0xX+WWiOAMtRQEktND97mergMZqGNgPwyb dsFbHl2kzYVR3EDudyPkDPfTzByrB9q5y87DhCrgqbKsEJceHLrc3Jx0xCPNrWiVa2b9 PBfejrpZriUgxpTGPXRyrOYqeaMF3Wp5tU0nAxjvGnSifRhL5ofpNoejg+YCyk/TfM4m jrrAQQEiHx4PRjI3KMYqoaEoL+zmZt2U69cXXuYjCBvInTimYDfHc/p6Iag7qC1g0C2x 85wA== X-Gm-Message-State: AOJu0YwN6m+zUFaqfvpBMRfEeHRlSF66sXaL6N1sP5gCZPAkrpQvrqoa ZI4ATdh/HIHX+66p1EdA/Q3QmUPCFqSSCinH X-Google-Smtp-Source: AGHT+IG9RYEu2C8PrmCD7QI2qMQNJEgSBO8xbaEp4NAAU1USG7/prOI0PY2Pwn1n8TmhwdYShjpjNQ== X-Received: by 2002:a17:90b:180f:b0:280:8356:10b2 with SMTP id lw15-20020a17090b180f00b00280835610b2mr5672876pjb.5.1700747198316; Thu, 23 Nov 2023 05:46:38 -0800 (PST) Received: from Laptop-X1.redhat.com ([43.228.180.230]) by smtp.gmail.com with ESMTPSA id 29-20020a17090a195d00b0028328057c67sm1414210pjh.45.2023.11.23.05.46.34 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 23 Nov 2023 05:46:37 -0800 (PST) From: Hangbin Liu To: netdev@vger.kernel.org Cc: "David S . Miller" , David Ahern , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Ido Schimmel , Nikolay Aleksandrov , Roopa Prabhu , Stephen Hemminger , Florian Westphal , Andrew Lunn , Florian Fainelli , Vladimir Oltean , Jiri Pirko , Marc Muehlfeld , Hangbin Liu Subject: [PATCHv2 net-next 07/10] docs: bridge: add multicast doc Date: Thu, 23 Nov 2023 21:45:50 +0800 Message-ID: <20231123134553.3394290-8-liuhangbin@gmail.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20231123134553.3394290-1-liuhangbin@gmail.com> References: <20231123134553.3394290-1-liuhangbin@gmail.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Patchwork-Delegate: kuba@kernel.org Add multicast part for bridge document. Signed-off-by: Hangbin Liu Acked-by: Nikolay Aleksandrov --- Documentation/networking/bridge.rst | 55 +++++++++++++++++++++++++++++ 1 file changed, 55 insertions(+) diff --git a/Documentation/networking/bridge.rst b/Documentation/networking/bridge.rst index f70f42ab7396..62cb6695cd22 100644 --- a/Documentation/networking/bridge.rst +++ b/Documentation/networking/bridge.rst @@ -165,6 +165,61 @@ on a bridge is disabled by default. After enabling VLAN filtering on a bridge, it will start forwarding frames to appropriate destinations based on their destination MAC address and VLAN tag (both must match). +Multicast +========= + +The Linux bridge driver has multicast support allowing it to process Internet +Group Management Protocol (IGMP) or Multicast Listener Discovery (MLD) +messages, and to efficiently forward multicast data packets. The bridge +driver support IGMPv2/IGMPv3 and MLDv1/MLDv2. + +Multicast snooping +------------------ + +Multicast snooping is a networking technology that allows network switches +to intelligently manage multicast traffic within a local area network (LAN). + +The switch maintains a multicast group table, which records the association +between multicast group addresses and the ports where hosts have joined these +groups. The group table is dynamically updated based on the IGMP/MLD messages +received. With the multicast group information gathered through snooping, the +switch optimizes the forwarding of multicast traffic. Instead of blindly +broadcasting the multicast traffic to all ports, it sends the multicast +traffic based on the destination MAC address only to ports which have joined +the respective destination multicast group. + +When created, the Linux bridge devices have multicast snooping enabled by +default. It maintains a Multicast forwarding database (MDB) which keeps track +of port and group relationships. + +IGMPv3/MLDv2 EHT support +------------------------ + +The Linux bridge supports IGMPv3/MLDv2 EHT (Explicit Host Tracking), which +was added by `474ddb37fa3a ("net: bridge: multicast: add EHT allow/block handling") +`_ + +The explicit host tracking enables the device to keep track of each +individual host that is joined to a particular group or channel. The main +benefit of the explicit host tracking in IGMP is to allow minimal leave +latencies when a host leaves a multicast group or channel. + +The length of time between a host wanting to leave and a device stopping +traffic forwarding is called the IGMP leave latency. A device configured +with IGMPv3 or MLDv2 and explicit tracking can immediately stop forwarding +traffic if the last host to request to receive traffic from the device +indicates that it no longer wants to receive traffic. The leave latency +is thus bound only by the packet transmission latencies in the multiaccess +network and the processing time in the device. + +Other multicast features +------------------------ +The Linux bridge also supports `per-VLAN multicast snooping +`_, +which is disabled by default but can be enabled. And `Multicast Router Discovery +`_, +which help identify the location of multicast routers. + FAQ === From patchwork Thu Nov 23 13:45:51 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hangbin Liu X-Patchwork-Id: 13466271 X-Patchwork-Delegate: kuba@kernel.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="YgoyYwCn" Received: from mail-pf1-x433.google.com (mail-pf1-x433.google.com [IPv6:2607:f8b0:4864:20::433]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D78A7D54 for ; Thu, 23 Nov 2023 05:46:43 -0800 (PST) Received: by mail-pf1-x433.google.com with SMTP id d2e1a72fcca58-6b20a48522fso777018b3a.1 for ; Thu, 23 Nov 2023 05:46:43 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1700747203; x=1701352003; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=f0eHcd9LyHw2hsBew4eC9u4lc8p/JkjTWelv2b6HLjM=; b=YgoyYwCn+xmZbbK0+LflWGtBI/o41WMskXLVbvBJtG+3FLvQiI+gCmxRNA+cLSL6D9 b2PJdkIoMmpdEu80BDmtWa8w9Hq7UiMvl2rE4gwQDnFW/YDoWgJG8t36CI0IT1fPaBPh 4wOGYBv6zJYlVkVe/nuSU3I95uxeWjjyyhoz++dDCLaVDcqWWSzboRwn6i/g4v9SUs4b M/i7B+JvHkTqAXTaRRzOyZWuJkTBEnAIpp/pZ3YUErFnIGeqCDRKn2SGkU1lZHoPz5+B gWXg6KV6UE6U04ZkCg4mb6qCOFae1HmsUavV5lhA/htRcHlV2ZJsglzXbLc41cuFNHF7 UVEA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1700747203; x=1701352003; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=f0eHcd9LyHw2hsBew4eC9u4lc8p/JkjTWelv2b6HLjM=; b=xCHkoedaT9GJlmF7eJz+JRbQRbu6TsHYBUhcQ/a0CJ7jDyav2jFiEO5AQvDHiyq34e /idvZ6kcLKEkRzZnqi4Cy2X167r82b6WdID9tR2UEbHAPLjapyICLnI3GvnFOXtXLsu0 ySOLIY2rWqYkbcEgvXxhx18goJcpK8SFS/S8+PeLOIFrYy+Tgn507d1yXT6N+f6xQ/G8 gOPI03DlE6E9tixvBvXw5QS1MPhaBg613vyL+E5TflIvJYy3kBGXIyuaz7SVLkqXs8vU O1P5Gx3VGPyzxroMzImqGv8nVnfrb8V1qxBXjhzydrK1fPPc20L+92amRyLzQ+jme0Fv 5nhA== X-Gm-Message-State: AOJu0Yxtxypan9zYt2zUzKlRMB8jU4PUenEN5pEQk9xo0duF4JA7U4IX pQJRmZMDfyX3yYivbGpz2eNPUkQGkHBy+F5L X-Google-Smtp-Source: AGHT+IGDnq2M+9N6/vG2Xcw9hzn+eREr5d1joozkqE6DnpsYzUhwlnVK8gdD/rWHQDwi3n95E0OjMg== X-Received: by 2002:a17:90b:3e83:b0:27d:8b6f:a626 with SMTP id rj3-20020a17090b3e8300b0027d8b6fa626mr5459804pjb.13.1700747202873; Thu, 23 Nov 2023 05:46:42 -0800 (PST) Received: from Laptop-X1.redhat.com ([43.228.180.230]) by smtp.gmail.com with ESMTPSA id 29-20020a17090a195d00b0028328057c67sm1414210pjh.45.2023.11.23.05.46.38 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 23 Nov 2023 05:46:42 -0800 (PST) From: Hangbin Liu To: netdev@vger.kernel.org Cc: "David S . Miller" , David Ahern , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Ido Schimmel , Nikolay Aleksandrov , Roopa Prabhu , Stephen Hemminger , Florian Westphal , Andrew Lunn , Florian Fainelli , Vladimir Oltean , Jiri Pirko , Marc Muehlfeld , Hangbin Liu Subject: [PATCHv2 net-next 08/10] docs: bridge: add switchdev doc Date: Thu, 23 Nov 2023 21:45:51 +0800 Message-ID: <20231123134553.3394290-9-liuhangbin@gmail.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20231123134553.3394290-1-liuhangbin@gmail.com> References: <20231123134553.3394290-1-liuhangbin@gmail.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Patchwork-Delegate: kuba@kernel.org Add switchdev part for bridge document. Reviewed-by: Vladimir Oltean Signed-off-by: Hangbin Liu Acked-by: Nikolay Aleksandrov --- Documentation/networking/bridge.rst | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/Documentation/networking/bridge.rst b/Documentation/networking/bridge.rst index 62cb6695cd22..f42c19e59268 100644 --- a/Documentation/networking/bridge.rst +++ b/Documentation/networking/bridge.rst @@ -220,6 +220,24 @@ which is disabled by default but can be enabled. And `Multicast Router Discovery `_, which help identify the location of multicast routers. +Switchdev +========= + +Linux Bridge Switchdev is a feature in the Linux kernel that extends the +capabilities of the traditional Linux bridge to work more efficiently with +hardware switches that support switchdev. With Linux Bridge Switchdev, certain +networking functions like forwarding, filtering, and learning of Ethernet +frames can be offloaded to a hardware switch. This offloading reduces the +burden on the Linux kernel and CPU, leading to improved network performance +and lower latency. + +To use Linux Bridge Switchdev, you need hardware switches that support the +switchdev interface. This means that the switch hardware needs to have the +necessary drivers and functionality to work in conjunction with the Linux +kernel. + +Please see the :ref:`switchdev` document for more details. + FAQ === From patchwork Thu Nov 23 13:45:52 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hangbin Liu X-Patchwork-Id: 13466272 X-Patchwork-Delegate: kuba@kernel.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="S2Kcr6S7" Received: from mail-pl1-x630.google.com (mail-pl1-x630.google.com [IPv6:2607:f8b0:4864:20::630]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CAB4B1B6 for ; Thu, 23 Nov 2023 05:46:48 -0800 (PST) Received: by mail-pl1-x630.google.com with SMTP id d9443c01a7336-1ccbb7f79cdso6647855ad.3 for ; Thu, 23 Nov 2023 05:46:48 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1700747207; x=1701352007; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=2mZC2nzFnQ3mwWSpuHTtFu23MzIGQ3zdT55w09zMXZo=; b=S2Kcr6S76l65JoUH3ifV2MVOnge/u1CX0U4CUcyDwEQigJdQsvUpzYaTWCn/e84Lan /oJ7DeSgoyHCYsnaM/MBREI14HibrqA2bCnncx9EyG4Cbmm+R5Nod8Jg3k+3xVpotB1C +I/eHQRCh2zdSzJTlo0OWKKZeviec6i/JhH13PkUFspPrxEKdONvUbkriIw12AwS6fP5 xzgzV0Ph2wGn48EUaioMuH4LOKeHCAxxVdtAY1r+YQijTiTwb68QULmv+Sh30kARw9ma GHPI0JW0vekXjWUSGXKxNWcU16txSvc3Kcb7LMOZzcMf/Q/HbdOtG7aefsovxI/eu3Vb 0ffw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1700747207; x=1701352007; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=2mZC2nzFnQ3mwWSpuHTtFu23MzIGQ3zdT55w09zMXZo=; b=fShptx7IqTqK2J5cXpsrkPAdgDGa1Pn1tvETrk6YWa+Qa9yma3csXRQZd7zOhfVPgL BQvgCsIRY+oNrQ6z6Fremyukj8mRWsz4O8eAU3Kb6Ko+GKemOl8DR2QZ7USpueNKxs8U KpRJIZMu/MHa8edqNcUkvjZZB/0qM2+PA+vKu4dpugpy0wCccoO/3NBL+ktJkFx81+u2 G35V82xUG//QSS9GkKpXi/s1Q035Sv4q+UrWO7ygHqyM4n8MtFK8ULt7E00rlxKMxkH0 D8gkLcAUvShcxmLGDHnO19m098h4hmeBAKhA7HmioOuMcmv1LkpIRPNt6UlSW2mUGkGx bFgQ== X-Gm-Message-State: AOJu0YxmV5aL9pSWHARyThe9w5C+Z128S36mBs4Wb8w/NtcsmxXQeo05 5JP4AS0b5HB1FY/VmevVm5g2H3jFLb8U64x/ X-Google-Smtp-Source: AGHT+IHV/SqpHg0/Lsq5ApqSOF8iMqYWd3uMTiEaamksK/49RhJ/m4b9miU/KcqLuLQy3D7VvtRxSw== X-Received: by 2002:a17:90b:1b41:b0:285:6946:e51e with SMTP id nv1-20020a17090b1b4100b002856946e51emr1067483pjb.36.1700747207697; Thu, 23 Nov 2023 05:46:47 -0800 (PST) Received: from Laptop-X1.redhat.com ([43.228.180.230]) by smtp.gmail.com with ESMTPSA id 29-20020a17090a195d00b0028328057c67sm1414210pjh.45.2023.11.23.05.46.43 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 23 Nov 2023 05:46:47 -0800 (PST) From: Hangbin Liu To: netdev@vger.kernel.org Cc: "David S . Miller" , David Ahern , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Ido Schimmel , Nikolay Aleksandrov , Roopa Prabhu , Stephen Hemminger , Florian Westphal , Andrew Lunn , Florian Fainelli , Vladimir Oltean , Jiri Pirko , Marc Muehlfeld , Hangbin Liu Subject: [PATCHv2 net-next 09/10] docs: bridge: add netfilter doc Date: Thu, 23 Nov 2023 21:45:52 +0800 Message-ID: <20231123134553.3394290-10-liuhangbin@gmail.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20231123134553.3394290-1-liuhangbin@gmail.com> References: <20231123134553.3394290-1-liuhangbin@gmail.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Patchwork-Delegate: kuba@kernel.org Add netfilter part for bridge document. Signed-off-by: Hangbin Liu Reviewed-by: Florian Westphal Acked-by: Nikolay Aleksandrov --- Documentation/networking/bridge.rst | 36 +++++++++++++++++++++++++++++ 1 file changed, 36 insertions(+) diff --git a/Documentation/networking/bridge.rst b/Documentation/networking/bridge.rst index f42c19e59268..772bbe28aefe 100644 --- a/Documentation/networking/bridge.rst +++ b/Documentation/networking/bridge.rst @@ -238,6 +238,42 @@ kernel. Please see the :ref:`switchdev` document for more details. +Netfilter +========= + +The bridge netfilter module is a legacy feature that allows to filter bridged +packets with iptables and ip6tables. Its use is discouraged. Users should +consider using nftables for packet filtering. + +The older ebtables tool is more feature-limited compared to nftables, but +just like nftables it doesn't need this module either to function. + +The br_netfilter module intercepts packets entering the bridge, performs +minimal sanity tests on ipv4 and ipv6 packets and then pretends that +these packets are being routed, not bridged. br_netfilter then calls +the ip and ipv6 netfilter hooks from the bridge layer, i.e. ip(6)tables +rulesets will also see these packets. + +br_netfilter is also the reason for the iptables *physdev* match: +This match is the only way to reliably tell routed and bridged packets +apart in an iptables ruleset. + +Note that ebtables and nftables will work fine without the br_netfilter module. +iptables/ip6tables/arptables do not work for bridged traffic because they +plug in the routing stack. nftables rules in ip/ip6/inet/arp families won't +see traffic that is forwarded by a bridge either, but that's very much how it +should be. + +Historically the feature set of ebtables was very limited (it still is), +this module was added to pretend packets are routed and invoke the ipv4/ipv6 +netfilter hooks from the bridge so users had access to the more feature-rich +iptables matching capabilities (including conntrack). nftables doesn't have +this limitation, pretty much all features work regardless of the protocol family. + +So, br_netfilter is only needed if users, for some reason, need to use +ip(6)tables to filter packets forwarded by the bridge, or NAT bridged +traffic. For pure link layer filtering, this module isn't needed. + FAQ === From patchwork Thu Nov 23 13:45:53 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hangbin Liu X-Patchwork-Id: 13466273 X-Patchwork-Delegate: kuba@kernel.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="hJUnobMR" Received: from mail-pj1-x102d.google.com (mail-pj1-x102d.google.com [IPv6:2607:f8b0:4864:20::102d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 53B69F9 for ; Thu, 23 Nov 2023 05:46:53 -0800 (PST) Received: by mail-pj1-x102d.google.com with SMTP id 98e67ed59e1d1-285685530f3so407536a91.0 for ; Thu, 23 Nov 2023 05:46:53 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1700747212; x=1701352012; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=rfCpLUY8uRc7ejP0BoGnUPM/LMXmRidgX+2dbabaW1M=; b=hJUnobMRu7GH4SlWNZkc3o749oIYLF1uQGowgzeEgol/NHupoZTOokn5jq61EU5tm/ 03hujjzo9R0ZbrdBbzN6SiEmSRa6t9E5x4TlVy/RdsWWpSIKxzT+rLnXEjCMGwZB59Ln JoA2mU1o8z7Czc1av4TMKmbSD4z0WCK8UCdGdAbFRnCJoDOdLVgRFdUTze0RQp4PgFQM cyBu3P9dqvlfZ9/cNfFOzMXH+MFeYRZ1t7xMeyRvq9vmYLa0RhAe0RMHG2IoUj9eBMrS lhREqOKuBIVZfvRAyX0c7zwjj3JsRH16garffEt1Mhg1Ti0+cUgi+vCyxD/c6Gtv8AvY BHyQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1700747212; x=1701352012; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=rfCpLUY8uRc7ejP0BoGnUPM/LMXmRidgX+2dbabaW1M=; b=ru3vsNnN0/15611oXBQA/RzHORPWKxdZDVGBic0JNWsivcC8JVrbm0QSB+NjisMQHW bJ8ofnxtwqzGZ1OLsfVDlRojUPyBgCsEaxtgR8FVlV7qTaLyOokdw/3M2sOxa0tt5QoG EePLD7sOQf0pAxgj8O4auz56DmO4vL3Pt9ECx6gIFfqxOcg/FxHmUfOCcgc5KGekuuAh /VHSzPPEK2DBmy+dpTwZRMgslpgYY06gmtZPHibPPvv47/4kSp5WkyxDbPhwF8smxRtI QBDHSYHYqmkcfwWSbX3XvETeoncm9uSj1WC7UtPrT8Fq+0Us76D8j3hPrfobKmuPWod2 8SMA== X-Gm-Message-State: AOJu0YzmabxTf1ug9KeY/CrdtqcOgEgRjyr8H5RNM64bGpF5qfmil3Dy kxZAbZeXYmKZqytTQ9Xwb9ckPJEcyv2xf0RU X-Google-Smtp-Source: AGHT+IG95qwWIecwU9lNiOCIXPjFCTg+Z3ZAbo04iCyAWOXqgw4gqzQw32m6M8/bI8BzRc/Z+f+zMQ== X-Received: by 2002:a17:90b:1b50:b0:26b:4a9e:3c7e with SMTP id nv16-20020a17090b1b5000b0026b4a9e3c7emr5584461pjb.4.1700747212187; Thu, 23 Nov 2023 05:46:52 -0800 (PST) Received: from Laptop-X1.redhat.com ([43.228.180.230]) by smtp.gmail.com with ESMTPSA id 29-20020a17090a195d00b0028328057c67sm1414210pjh.45.2023.11.23.05.46.48 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 23 Nov 2023 05:46:51 -0800 (PST) From: Hangbin Liu To: netdev@vger.kernel.org Cc: "David S . Miller" , David Ahern , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Ido Schimmel , Nikolay Aleksandrov , Roopa Prabhu , Stephen Hemminger , Florian Westphal , Andrew Lunn , Florian Fainelli , Vladimir Oltean , Jiri Pirko , Marc Muehlfeld , Hangbin Liu Subject: [PATCHv2 net-next 10/10] docs: bridge: add other features Date: Thu, 23 Nov 2023 21:45:53 +0800 Message-ID: <20231123134553.3394290-11-liuhangbin@gmail.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20231123134553.3394290-1-liuhangbin@gmail.com> References: <20231123134553.3394290-1-liuhangbin@gmail.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Patchwork-Delegate: kuba@kernel.org Add some features that are not appropriate for the existing section to the "Others" part of the bridge document. Signed-off-by: Hangbin Liu Acked-by: Nikolay Aleksandrov --- Documentation/networking/bridge.rst | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/Documentation/networking/bridge.rst b/Documentation/networking/bridge.rst index 772bbe28aefe..54118d9da2a4 100644 --- a/Documentation/networking/bridge.rst +++ b/Documentation/networking/bridge.rst @@ -274,6 +274,20 @@ So, br_netfilter is only needed if users, for some reason, need to use ip(6)tables to filter packets forwarded by the bridge, or NAT bridged traffic. For pure link layer filtering, this module isn't needed. +Other Features +============== + +The Linux bridge also supports `IEEE 802.11 Proxy ARP +`_, +`Media Redundancy Protocol (MRP) +`_, +`Media Redundancy Protocol (MRP) LC mode +`_, +`IEEE 802.1X port authentication +`_, +and `MAC Authentication Bypass (MAB) +`_. + FAQ ===