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Wed, 16 Apr 2025 09:34:48 +0000 Message-ID: <13084ebf-0a1c-4d12-ba98-802494e00e21@intel.com> Date: Wed, 16 Apr 2025 10:34:44 +0100 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v1 02/12] node: add IP4 lookup FIB node To: Ankur Dwivedi , CC: , , , , References: <20250415121052.1497155-1-adwivedi@marvell.com> <20250415121052.1497155-3-adwivedi@marvell.com> Content-Language: en-US From: "Medvedkin, Vladimir" In-Reply-To: <20250415121052.1497155-3-adwivedi@marvell.com> Content-Type: text/plain; charset="UTF-8"; format=flowed Content-Transfer-Encoding: 7bit X-ClientProxiedBy: DU6P191CA0025.EURP191.PROD.OUTLOOK.COM (2603:10a6:10:53f::25) To SJ0PR11MB5772.namprd11.prod.outlook.com (2603:10b6:a03:422::8) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SJ0PR11MB5772:EE_|MN0PR11MB6033:EE_ X-MS-Office365-Filtering-Correlation-Id: 9f3a97a0-7d18-4235-c7eb-08dd7cc9ee4f X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|366016|1800799024|376014|7053199007; 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> +}; > + > +struct ip4_lookup_fib_node_ctx { > + /* Socket's FIB */ > + struct rte_fib *fib; > + /* Dynamic offset to mbuf priv1 */ > + int mbuf_priv1_off; > +}; > + > +static struct ip4_lookup_fib_node_main ip4_lookup_fib_nm; > + > +#define FIB_MAX_ROUTES (1 << 16) why only 64k routes? Modern BGP full view has about 1M prefixes > +#define FIB_NUM_TBL8 (1 << 15) > +#define FIB_DEFAULT_NH 999 why this particular value? It is ok to use magic values in examples, but not for libs. Consider something like 0 or UINT{8,16,32,64}MAX or some meaningful value within graph infra > + > +#define IP4_LOOKUP_NODE_FIB(ctx) \ > + (((struct ip4_lookup_fib_node_ctx *)ctx)->fib) > + > +#define IP4_LOOKUP_NODE_PRIV1_OFF(ctx) \ > + (((struct ip4_lookup_fib_node_ctx *)ctx)->mbuf_priv1_off) > + > +static int > +setup_fib(unsigned int socket) > +{ > + struct ip4_lookup_fib_node_main *nm = &ip4_lookup_fib_nm; > + struct rte_fib_conf conf; > + char s[RTE_FIB_NAMESIZE]; > + > + /* One fib per socket */ > + if (nm->fib[socket]) > + return 0; > + > + conf.type = RTE_FIB_DIR24_8; > + conf.default_nh = FIB_DEFAULT_NH; > + conf.max_routes = FIB_MAX_ROUTES; > + conf.rib_ext_sz = 0; > + conf.dir24_8.nh_sz = RTE_FIB_DIR24_8_4B; > + conf.dir24_8.num_tbl8 = FIB_NUM_TBL8; > + conf.flags = 0; > + snprintf(s, sizeof(s), "IPV4_LOOKUP_FIB_%d", socket); > + nm->fib[socket] = rte_fib_create(s, socket, &conf); > + if (nm->fib[socket] == NULL) > + return -rte_errno; > + > + return 0; > +} > + > +static int > +ip4_lookup_fib_node_init(const struct rte_graph *graph, struct rte_node *node) > +{ > + static uint8_t init_once; > + unsigned int socket; > + uint16_t lcore_id; > + int rc; > + > + RTE_BUILD_BUG_ON(sizeof(struct ip4_lookup_fib_node_ctx) > RTE_NODE_CTX_SZ); > + > + if (!init_once) { > + node_mbuf_priv1_dynfield_offset = rte_mbuf_dynfield_register( > + &node_mbuf_priv1_dynfield_desc); > + if (node_mbuf_priv1_dynfield_offset < 0) > + return -rte_errno; > + > + /* Setup FIB for all sockets */ > + RTE_LCORE_FOREACH(lcore_id) > + { > + socket = rte_lcore_to_socket_id(lcore_id); > + rc = setup_fib(socket); > + if (rc) { > + node_err("ip4_lookup_fib", > + "Failed to setup fib for sock %u, rc=%d", > + socket, rc); > + return rc; > + } > + } > + init_once = 1; > + } > + > + /* Update socket's FIB and mbuf dyn priv1 offset in node ctx */ > + IP4_LOOKUP_NODE_FIB(node->ctx) = ip4_lookup_fib_nm.fib[graph->socket]; > + IP4_LOOKUP_NODE_PRIV1_OFF(node->ctx) = node_mbuf_priv1_dynfield_offset; > + > + node_dbg("ip4_lookup_fib", "Initialized ip4_lookup_fib node"); > + > + return 0; > +} > + > +static struct rte_node_xstats ip4_lookup_fib_xstats = { > + .nb_xstats = 1, > + .xstat_desc = { > + [0] = "ip4_lookup_fib_error", > + }, > +}; > + > +static struct rte_node_register ip4_lookup_fib_node = { > + .name = "ip4_lookup_fib", > + > + .init = ip4_lookup_fib_node_init, > + .xstats = &ip4_lookup_fib_xstats, > + > + .nb_edges = RTE_NODE_IP4_LOOKUP_NEXT_PKT_DROP + 1, > + .next_nodes = { > + [RTE_NODE_IP4_LOOKUP_NEXT_IP4_LOCAL] = "ip4_local", > + [RTE_NODE_IP4_LOOKUP_NEXT_REWRITE] = "ip4_rewrite", > + [RTE_NODE_IP4_LOOKUP_NEXT_PKT_DROP] = "pkt_drop", > + }, > +}; > + > +RTE_NODE_REGISTER(ip4_lookup_fib_node); > diff --git a/lib/node/meson.build b/lib/node/meson.build > index 0bed97a96c..d2011c8f56 100644 > --- a/lib/node/meson.build > +++ b/lib/node/meson.build > @@ -13,6 +13,7 @@ sources = files( > 'ethdev_tx.c', > 'ip4_local.c', > 'ip4_lookup.c', > + 'ip4_lookup_fib.c', > 'ip4_reassembly.c', > 'ip4_rewrite.c', > 'ip6_lookup.c', > @@ -34,4 +35,4 @@ headers = files( > > # Strict-aliasing rules are violated by uint8_t[] to context size casts. > cflags += '-fno-strict-aliasing' > -deps += ['graph', 'mbuf', 'lpm', 'ethdev', 'mempool', 'cryptodev', 'ip_frag'] > +deps += ['graph', 'mbuf', 'lpm', 'ethdev', 'mempool', 'cryptodev', 'ip_frag', 'fib'] -- Regards, Vladimir