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Miller" , bridge@lists.linux-foundation.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Jakub Kicinski , andrew@lunn.ch, f.fainelli@gmail.com, vivien.didelot@gmail.com, jiri@resnulli.us, idosch@idosch.org Subject: [PATCH v3 iproute2] bridge: add support for L2 multicast groups Date: Wed, 25 Nov 2020 16:36:39 +0200 Message-Id: <20201125143639.3587854-1-vladimir.oltean@nxp.com> X-Mailer: git-send-email 2.25.1 X-Originating-IP: [188.25.2.120] X-ClientProxiedBy: AM4PR0302CA0027.eurprd03.prod.outlook.com (2603:10a6:205:2::40) To VI1PR04MB5696.eurprd04.prod.outlook.com (2603:10a6:803:e7::13) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from localhost.localdomain (188.25.2.120) by AM4PR0302CA0027.eurprd03.prod.outlook.com (2603:10a6:205:2::40) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3611.22 via Frontend Transport; Wed, 25 Nov 2020 14:36:50 +0000 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-HT: Tenant X-MS-Office365-Filtering-Correlation-Id: 7f79cd0c-a985-4a99-2a58-08d8914f8c90 X-MS-TrafficTypeDiagnostic: VI1PR04MB5296: X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:1388; X-MS-Exchange-SenderADCheck: 1 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: zl8Yudenp38KgWJ9nMy5XW8CzxRcuRyRYV23IiyKMLSdZJbhZfQ33zz+7IXtGLBX3xpfajhY6oR8nEzyBKzvAmbqL0Ae46UzOwiHwy6/HJ4NNA/dTswZkC/ywT61pc43v8Sk/8TLJ8G47dhu7XdqlHMz9mXD6rqZDFLE9SrFRBI9x2Lwjj9PHwQtQLOB9z8s9w1yZUOLIOrk0blR2Jot72y6thxkTfNA8JCY6HRrA4C/SyVAakiOKRrgjBrfle9y7QUm/mTnWJrZuqblCeMIqgMZUAAaz84jLxQ3jWtxNYEpUWMpI5SmtN/Tuv5Whj/P3+bDOSKpIvUy89IQgtcrzUr9vBfQm3BaC0SupocH/SdiDmI8oxWUY1nk56xXi2w4L4XoaprfAJC4QiFSQpyYjrNu2mfRjl64ZFfzoFmEbc7hgqmY6deR2lle1yvVT2IbnniLKJpUT/TkD0zcH7bKxA== X-Forefront-Antispam-Report: CIP:255.255.255.255; CTRY:; LANG:en; SCL:1; SRV:; IPV:NLI; SFV:NSPM; H:VI1PR04MB5696.eurprd04.prod.outlook.com; PTR:; CAT:NONE; SFS:(4636009)(396003)(39860400002)(366004)(136003)(376002)(346002)(8676002)(8936002)(44832011)(69590400008)(2906002)(186003)(16526019)(7416002)(956004)(2616005)(26005)(6506007)(52116002)(83380400001)(6512007)(316002)(110136005)(6486002)(36756003)(86362001)(66946007)(66476007)(4326008)(66556008)(478600001)(1076003)(5660300002)(966005)(6666004); DIR:OUT; SFP:1101; X-MS-Exchange-AntiSpam-MessageData: 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 X-OriginatorOrg: nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: 7f79cd0c-a985-4a99-2a58-08d8914f8c90 X-MS-Exchange-CrossTenant-AuthSource: VI1PR04MB5696.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 25 Nov 2020 14:36:52.1946 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: tYtjyJ3PKTg3yPXeOWuJqQT6X3LTANQJmhLKDiR/zL5GcJkhmjfD+PLYxYyHiGO2s0rbIbVde4nj4Mj8kF1Zsg== X-MS-Exchange-Transport-CrossTenantHeadersStamped: VI1PR04MB5296 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Extend the 'bridge mdb' command for the following syntax: bridge mdb add dev br0 port swp0 grp 01:02:03:04:05:06 permanent Signed-off-by: Vladimir Oltean --- Changes in v3: - Using rt_addr_n2a_r instead of inet_ntop/ll_addr_n2a directly. - Updated the bridge manpage. Changes in v2: - Removed the const void casts. - Removed MDB_FLAGS_L2 from the UAPI to be in sync with the latest kernel patch: https://patchwork.ozlabs.org/project/netdev/patch/20201028233831.610076-1-vladimir.oltean@nxp.com/ bridge/mdb.c | 54 ++++++++++++++++++++++++++-------- include/uapi/linux/if_bridge.h | 1 + man/man8/bridge.8 | 8 ++--- 3 files changed, 46 insertions(+), 17 deletions(-) diff --git a/bridge/mdb.c b/bridge/mdb.c index 4cd7ca762b78..ef89258bc5c3 100644 --- a/bridge/mdb.c +++ b/bridge/mdb.c @@ -149,6 +149,7 @@ static void print_mdb_entry(FILE *f, int ifindex, const struct br_mdb_entry *e, struct nlmsghdr *n, struct rtattr **tb) { const void *grp, *src; + const char *addr; SPRINT_BUF(abuf); const char *dev; int af; @@ -156,9 +157,16 @@ static void print_mdb_entry(FILE *f, int ifindex, const struct br_mdb_entry *e, if (filter_vlan && e->vid != filter_vlan) return; - af = e->addr.proto == htons(ETH_P_IP) ? AF_INET : AF_INET6; - grp = af == AF_INET ? (const void *)&e->addr.u.ip4 : - (const void *)&e->addr.u.ip6; + if (!e->addr.proto) { + af = AF_PACKET; + grp = &e->addr.u.mac_addr; + } else if (e->addr.proto == htons(ETH_P_IP)) { + af = AF_INET; + grp = &e->addr.u.ip4; + } else { + af = AF_INET6; + grp = &e->addr.u.ip6; + } dev = ll_index_to_name(ifindex); open_json_object(NULL); @@ -168,9 +176,14 @@ static void print_mdb_entry(FILE *f, int ifindex, const struct br_mdb_entry *e, print_string(PRINT_ANY, "port", " port %s", ll_index_to_name(e->ifindex)); + /* The ETH_ALEN argument is ignored for all cases but AF_PACKET */ + addr = rt_addr_n2a_r(af, ETH_ALEN, grp, abuf, sizeof(abuf)); + if (!addr) + return; + print_color_string(PRINT_ANY, ifa_family_color(af), - "grp", " grp %s", - inet_ntop(af, grp, abuf, sizeof(abuf))); + "grp", " grp %s", addr); + if (tb && tb[MDBA_MDB_EATTR_SOURCE]) { src = (const void *)RTA_DATA(tb[MDBA_MDB_EATTR_SOURCE]); print_color_string(PRINT_ANY, ifa_family_color(af), @@ -440,6 +453,25 @@ static int mdb_show(int argc, char **argv) return 0; } +static int mdb_parse_grp(const char *grp, struct br_mdb_entry *e) +{ + if (inet_pton(AF_INET, grp, &e->addr.u.ip4)) { + e->addr.proto = htons(ETH_P_IP); + return 0; + } + if (inet_pton(AF_INET6, grp, &e->addr.u.ip6)) { + e->addr.proto = htons(ETH_P_IPV6); + return 0; + } + if (ll_addr_a2n((char *)e->addr.u.mac_addr, sizeof(e->addr.u.mac_addr), + grp) == ETH_ALEN) { + e->addr.proto = 0; + return 0; + } + + return -1; +} + static int mdb_modify(int cmd, int flags, int argc, char **argv) { struct { @@ -497,14 +529,10 @@ static int mdb_modify(int cmd, int flags, int argc, char **argv) if (!entry.ifindex) return nodev(p); - if (!inet_pton(AF_INET, grp, &entry.addr.u.ip4)) { - if (!inet_pton(AF_INET6, grp, &entry.addr.u.ip6)) { - fprintf(stderr, "Invalid address \"%s\"\n", grp); - return -1; - } else - entry.addr.proto = htons(ETH_P_IPV6); - } else - entry.addr.proto = htons(ETH_P_IP); + if (mdb_parse_grp(grp, &entry)) { + fprintf(stderr, "Invalid address \"%s\"\n", grp); + return -1; + } entry.vid = vid; addattr_l(&req.n, sizeof(req), MDBA_SET_ENTRY, &entry, sizeof(entry)); diff --git a/include/uapi/linux/if_bridge.h b/include/uapi/linux/if_bridge.h index 69b99901fc5a..db41a5ff34af 100644 --- a/include/uapi/linux/if_bridge.h +++ b/include/uapi/linux/if_bridge.h @@ -526,6 +526,7 @@ struct br_mdb_entry { union { __be32 ip4; struct in6_addr ip6; + unsigned char mac_addr[ETH_ALEN]; } u; __be16 proto; } addr; diff --git a/man/man8/bridge.8 b/man/man8/bridge.8 index 84b9b70c7dea..b3414ae31faf 100644 --- a/man/man8/bridge.8 +++ b/man/man8/bridge.8 @@ -665,7 +665,7 @@ the bridge to which this address is associated. .SH bridge mdb - multicast group database management .B mdb -objects contain known IP multicast group addresses on a link. +objects contain known IP or L2 multicast group addresses on a link. .P The corresponding commands display mdb entries, add new entries, @@ -685,11 +685,11 @@ the port whose link is known to have members of this multicast group. .TP .BI grp " GROUP" -the IP multicast group address whose members reside on the link connected to -the port. +the multicast group address (IPv4, IPv6 or L2 multicast) whose members reside +on the link connected to the port. .B permanent -- the mdb entry is permanent +- the mdb entry is permanent. Optional for IPv4 and IPv6, mandatory for L2. .sp .B temp