/* * l2_input.c : layer 2 input packet processing * * Copyright (c) 2013 Cisco and/or its affiliates. * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at: * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include extern clib_error_t * ethernet_arp_hw_interface_link_up_down (vnet_main_t * vnm, u32 hw_if_index, u32 flags); // Feature graph node names static char * l2input_feat_names[] = { #define _(sym,name) name, foreach_l2input_feat #undef _ }; char **l2input_get_feat_names(void) { return l2input_feat_names; } typedef struct { /* per-pkt trace data */ u8 src[6]; u8 dst[6]; u32 next_index; u32 sw_if_index; } l2input_trace_t; /* packet trace format function */ static u8 * format_l2input_trace (u8 * s, va_list * args) { CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *); CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *); l2input_trace_t * t = va_arg (*args, l2input_trace_t *); s = format (s, "l2-input: sw_if_index %d dst %U src %U", t->sw_if_index, format_ethernet_address, t->dst, format_ethernet_address, t->src); return s; } l2input_main_t l2input_main; static vlib_node_registration_t l2input_node; #define foreach_l2input_error \ _(L2INPUT, "L2 input packets") \ _(DROP, "L2 input drops") typedef enum { #define _(sym,str) L2INPUT_ERROR_##sym, foreach_l2input_error #undef _ L2INPUT_N_ERROR, } l2input_error_t; static char * l2input_error_strings[] = { #define _(sym,string) string, foreach_l2input_error #undef _ }; typedef enum { /* */ L2INPUT_NEXT_LEARN, L2INPUT_NEXT_FWD, L2INPUT_NEXT_DROP, L2INPUT_N_NEXT, } l2input_next_t; static_always_inline void classify_and_dispatch (vlib_main_t * vm, vlib_node_runtime_t * node, u32 cpu_index, l2input_main_t * msm, vlib_buffer_t * b0, u32 *next0) { // Load L2 input feature struct // Load bridge domain struct // Parse ethernet header to determine unicast/mcast/broadcast // take L2 input stat // classify packet as IP/UDP/TCP, control, other // mask feature bitmap // go to first node in bitmap // Later: optimize VTM // // For L2XC, // set tx sw-if-handle u8 mcast_dmac; __attribute__((unused)) u8 l2bcast; __attribute__((unused)) u8 l2mcast; __attribute__((unused)) u8 l2_stat_kind; u16 ethertype; u8 protocol; l2_input_config_t *config; l2_bridge_domain_t *bd_config; u16 bd_index0; u32 feature_bitmap; u32 feat_mask; ethernet_header_t * h0; u8 * l3h0; u32 sw_if_index0; u8 bvi_flg = 0; #define get_u32(addr) ( *((u32 *)(addr)) ) #define get_u16(addr) ( *((u16 *)(addr)) ) #define STATS_IF_LAYER2_UCAST_INPUT_CNT 0 #define STATS_IF_LAYER2_MCAST_INPUT_CNT 1 #define STATS_IF_LAYER2_BCAST_INPUT_CNT 2 // Check for from-BVI processing // When we come from ethernet-input, TX is ~0 if (PREDICT_FALSE (vnet_buffer(b0)->sw_if_index[VLIB_TX] != ~0)) { // Set up for a from-bvi packet bvi_to_l2 (vm, msm->vnet_main, cpu_index, b0, vnet_buffer(b0)->sw_if_index[VLIB_TX]); bvi_flg = 1; } // The RX interface can be changed by bvi_to_l2() sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX]; h0 = vlib_buffer_get_current (b0); l3h0 = (u8 *)h0 + vnet_buffer(b0)->l2.l2_len; // Determine L3 packet type. Only need to check the common types. // Used to filter out features that don't apply to common packets. ethertype = clib_net_to_host_u16(get_u16(l3h0 - 2)); if (ethertype == ETHERNET_TYPE_IP4) { protocol = ((ip4_header_t *)l3h0)->protocol; if ((protocol == IP_PROTOCOL_UDP) || (protocol == IP_PROTOCOL_TCP)) { feat_mask = IP_UDP_TCP_FEAT_MASK; } else { feat_mask = IP4_FEAT_MASK; } } else if (ethertype == ETHERNET_TYPE_IP6) { protocol = ((ip6_header_t *)l3h0)->protocol; // Don't bother checking for extension headers for now if ((protocol == IP_PROTOCOL_UDP) || (protocol == IP_PROTOCOL_TCP)) { feat_mask = IP_UDP_TCP_FEAT_MASK; } else { feat_mask = IP6_FEAT_MASK; } } else if (ethertype == ETHERNET_TYPE_MPLS_UNICAST) { feat_mask = IP6_FEAT_MASK; } else { // allow all features feat_mask = ~0; } // determine layer2 kind for stat and mask mcast_dmac = ethernet_address_cast(h0->dst_address); l2bcast = 0; l2mcast = 0; l2_stat_kind = STATS_IF_LAYER2_UCAST_INPUT_CNT; if (PREDICT_FALSE (mcast_dmac)) { u32 *dsthi = (u32 *) &h0->dst_address[0]; u32 *dstlo = (u32 *) &h0->dst_address[2]; // Disable bridge forwarding (flooding will execute instead if not xconnect) feat_mask &= ~(L2INPUT_FEAT_FWD | L2INPUT_FEAT_UU_FLOOD); if (ethertype != ETHERNET_TYPE_ARP) // Disable ARP-term for non-ARP packet feat_mask &= ~(L2INPUT_FEAT_ARP_TERM); // dest mac is multicast or broadcast if ((*dstlo == 0xFFFFFFFF) && (*dsthi == 0xFFFFFFFF)) { // dest mac == FF:FF:FF:FF:FF:FF l2_stat_kind = STATS_IF_LAYER2_BCAST_INPUT_CNT; l2bcast=1; } else { l2_stat_kind = STATS_IF_LAYER2_MCAST_INPUT_CNT; l2mcast=1; } } // TODO: take l2 stat // Get config for the input interface config = vec_elt_at_index(msm->configs, sw_if_index0); // Save split horizon group, use 0 for BVI to make sure not dropped vnet_buffer(b0)->l2.shg = bvi_flg ? 0 : config->shg; if (config->xconnect) { // Set the output interface vnet_buffer(b0)->sw_if_index[VLIB_TX] = config->output_sw_if_index; } else { // Do bridge-domain processing bd_index0 = config->bd_index; // save BD ID for next feature graph nodes vnet_buffer(b0)->l2.bd_index = bd_index0; // Get config for the bridge domain interface bd_config = vec_elt_at_index(msm->bd_configs, bd_index0); // Process bridge domain feature enables. // To perform learning/flooding/forwarding, the corresponding bit // must be enabled in both the input interface config and in the // bridge domain config. In the bd_bitmap, bits for features other // than learning/flooding/forwarding should always be set. feat_mask = feat_mask & bd_config->feature_bitmap; } // mask out features from bitmap using packet type and bd config feature_bitmap = config->feature_bitmap & feat_mask; // save for next feature graph nodes vnet_buffer(b0)->l2.feature_bitmap = feature_bitmap; // Determine the next node *next0 = feat_bitmap_get_next_node_index(msm->feat_next_node_index, feature_bitmap); } static uword l2input_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) { u32 n_left_from, * from, * to_next; l2input_next_t next_index; l2input_main_t * msm = &l2input_main; vlib_node_t *n = vlib_get_node (vm, l2input_node.index); u32 node_counter_base_index = n->error_heap_index; vlib_error_main_t * em = &vm->error_main; u32 cpu_index = os_get_cpu_number(); from = vlib_frame_vector_args (frame); n_left_from = frame->n_vectors; /* number of packets to process */ next_index = node->cached_next_index; while (n_left_from > 0) { u32 n_left_to_next; /* get space to enqueue frame to graph node "next_index" */ vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); while (n_left_from >= 6 && n_left_to_next >= 2) { u32 bi0, bi1; vlib_buffer_t * b0, * b1; u32 next0, next1; u32 sw_if_index0, sw_if_index1; /* Prefetch next iteration. */ { vlib_buffer_t * p2, * p3, * p4 , * p5; u32 sw_if_index2, sw_if_index3; p2 = vlib_get_buffer (vm, from[2]); p3 = vlib_get_buffer (vm, from[3]); p4 = vlib_get_buffer (vm, from[4]); p5 = vlib_get_buffer (vm, from[5]); // Prefetch the buffer header and packet for the N+2 loop iteration vlib_prefetch_buffer_header (p4, LOAD); vlib_prefetch_buffer_header (p5, LOAD); CLIB_PREFETCH (p4->data, CLIB_CACHE_LINE_BYTES, STORE); CLIB_PREFETCH (p5->data, CLIB_CACHE_LINE_BYTES, STORE); // Prefetch the input config for the N+1 loop iteration // This depends on the buffer header above sw_if_index2 = vnet_buffer(p2)->sw_if_index[VLIB_RX]; sw_if_index3 = vnet_buffer(p3)->sw_if_index[VLIB_RX]; CLIB_PREFETCH (&msm->configs[sw_if_index2], CLIB_CACHE_LINE_BYTES, LOAD); CLIB_PREFETCH (&msm->configs[sw_if_index3], CLIB_CACHE_LINE_BYTES, LOAD); // Don't bother prefetching the bridge-domain config (which // depends on the input config above). Only a small number of // bridge domains are expected. Plus the structure is small // and several fit in a cache line. } /* speculatively enqueue b0 and b1 to the current next frame */ /* bi is "buffer index", b is pointer to the buffer */ to_next[0] = bi0 = from[0]; to_next[1] = bi1 = from[1]; from += 2; to_next += 2; n_left_from -= 2; n_left_to_next -= 2; b0 = vlib_get_buffer (vm, bi0); b1 = vlib_get_buffer (vm, bi1); if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE))) { /* RX interface handles */ sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX]; sw_if_index1 = vnet_buffer(b1)->sw_if_index[VLIB_RX]; if (b0->flags & VLIB_BUFFER_IS_TRACED) { ethernet_header_t * h0 = vlib_buffer_get_current (b0); l2input_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t)); t->sw_if_index = sw_if_index0; memcpy(t->src, h0->src_address, 6); memcpy(t->dst, h0->dst_address, 6); } if (b1->flags & VLIB_BUFFER_IS_TRACED) { ethernet_header_t * h1 = vlib_buffer_get_current (b1); l2input_trace_t *t = vlib_add_trace (vm, node, b1, sizeof (*t)); t->sw_if_index = sw_if_index1; memcpy(t->src, h1->src_address, 6); memcpy(t->dst, h1->dst_address, 6); } } em->counters[node_counter_base_index + L2INPUT_ERROR_L2INPUT] += 2; classify_and_dispatch (vm, node, cpu_index, msm, b0, &next0); classify_and_dispatch (vm, node, cpu_index, msm, b1, &next1); /* verify speculative enqueues, maybe switch current next frame */ /* if next0==next1==next_index then nothing special needs to be done */ vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next, n_left_to_next, bi0, bi1, next0, next1); } while (n_left_from > 0 && n_left_to_next > 0) { u32 bi0; vlib_buffer_t * b0; u32 next0; u32 sw_if_index0; /* speculatively enqueue b0 to the current next frame */ bi0 = from[0]; to_next[0] = bi0; from += 1; to_next += 1; n_left_from -= 1; n_left_to_next -= 1; b0 = vlib_get_buffer (vm, bi0); if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE) && (b0->flags & VLIB_BUFFER_IS_TRACED))) { ethernet_header_t * h0 = vlib_buffer_get_current (b0); l2input_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t)); sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX]; t->sw_if_index = sw_if_index0; memcpy(t->src, h0->src_address, 6); memcpy(t->dst, h0->dst_address, 6); } em->counters[node_counter_base_index + L2INPUT_ERROR_L2INPUT] += 1; classify_and_dispatch (vm, node, cpu_index, msm, b0, &next0); /* verify speculative enqueue, maybe switch current next frame */ vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next, n_left_to_next, bi0, next0); } vlib_put_next_frame (vm, node, next_index, n_left_to_next); } return frame->n_vectors; } VLIB_REGISTER_NODE (l2input_node,static) = { .function = l2input_node_fn, .name = "l2-input", .vector_size = sizeof (u32), .format_trace = format_l2input_trace, .type = VLIB_NODE_TYPE_INTERNAL, .n_errors = ARRAY_LEN(l2input_error_strings), .error_strings = l2input_error_strings, .n_next_nodes = L2INPUT_N_NEXT, /* edit / add dispositions here */ .next_nodes = { [L2INPUT_NEXT_LEARN] = "l2-learn", [L2INPUT_NEXT_FWD] = "l2-fwd", [L2INPUT_NEXT_DROP] = "error-drop", }, }; clib_error_t *l2input_init (vlib_main_t *vm) { l2input_main_t * mp = &l2input_main; mp->vlib_main = vm; mp->vnet_main = vnet_get_main(); // Get packets RX'd from L2 interfaces ethernet_register_l2_input (vm, l2input_node.index); // Create the config vector vec_validate(mp->configs, 100); // create 100 sw interface entries and zero them // Initialize the feature next-node indexes feat_bitmap_init_next_nodes(vm, l2input_node.index, L2INPUT_N_FEAT, l2input_get_feat_names(), mp->feat_next_node_index); return 0; } VLIB_INIT_FUNCTION (l2input_init); // Get a pointer to the config for the given interface l2_input_config_t * l2input_intf_config (u32 sw_if_index) { l2input_main_t * mp = &l2input_main; vec_validate(mp->configs, sw_if_index); return vec_elt_at_index(mp->configs, sw_if_index); } // Enable (or disable) the feature in the bitmap for the given interface u32 l2input_intf_bitmap_enable (u32 sw_if_index, u32 feature_bitmap, u32 enable) { l2input_main_t * mp = &l2input_main; l2_input_config_t *config; vec_validate(mp->configs, sw_if_index); config = vec_elt_at_index(mp->configs, sw_if_index); if (enable) { config->feature_bitmap |= feature_bitmap; } else { config->feature_bitmap &= ~feature_bitmap; } return config->feature_bitmap; } // Set the subinterface to run in l2 or l3 mode. // for L3 mode, just the sw_if_index is specified // for bridged mode, the bd id and bvi flag are also specified // for xconnect mode, the peer sw_if_index is also specified // Return 0 if ok, or non-0 if there was an error u32 set_int_l2_mode (vlib_main_t * vm, vnet_main_t * vnet_main, u32 mode, u32 sw_if_index, u32 bd_index, // for bridged interface u32 bvi, // the bridged interface is the BVI u32 shg, // the bridged interface's split horizon group u32 xc_sw_if_index) // peer interface for xconnect { l2input_main_t * mp = &l2input_main; vnet_main_t * vnm = vnet_get_main(); vnet_hw_interface_t * hi; l2_output_config_t * out_config; l2_input_config_t * config; l2_bridge_domain_t * bd_config; l2_flood_member_t member; u64 mac; i32 l2_if_adjust = 0; hi = vnet_get_sup_hw_interface (vnet_main, sw_if_index); vec_validate(mp->configs, sw_if_index); config = vec_elt_at_index(mp->configs, sw_if_index); if (config->bridge) { // Interface is already in bridge mode. Undo the existing config. bd_config = vec_elt_at_index(mp->bd_configs, config->bd_index); // remove interface from flood vector bd_remove_member (bd_config, sw_if_index); // undo any BVI-related config if (bd_config->bvi_sw_if_index == sw_if_index) { bd_config->bvi_sw_if_index = ~0; config->bvi = 0; // restore output node hi->output_node_index = bd_config->saved_bvi_output_node_index; // delete the l2fib entry for the bvi interface mac = *((u64 *)hi->hw_address); l2fib_del_entry (mac, config->bd_index); } l2_if_adjust--; } else if (config->xconnect) { l2_if_adjust--; } // Initialize the l2-input configuration for the interface if (mode == MODE_L3) { config->xconnect = 0; config->bridge = 0; config->shg = 0; config->bd_index = 0; config->feature_bitmap = L2INPUT_FEAT_DROP; } else if (mode == MODE_L2_CLASSIFY) { config->xconnect = 1; config->bridge = 0; config->output_sw_if_index = xc_sw_if_index; // Make sure last-chance drop is configured config->feature_bitmap |= L2INPUT_FEAT_DROP | L2INPUT_FEAT_CLASSIFY; // Make sure bridging features are disabled config->feature_bitmap &= ~(L2INPUT_FEAT_LEARN | L2INPUT_FEAT_FWD | L2INPUT_FEAT_FLOOD); shg = 0; // not used in xconnect // Insure all packets go to ethernet-input ethernet_set_rx_redirect (vnet_main, hi, 1); } else { if (mode == MODE_L2_BRIDGE) { /* * Remove a check that the interface must be an Ethernet. * Specifically so we can bridge to L3 tunnel interfaces. * Here's the check: * if (hi->hw_class_index != ethernet_hw_interface_class.index) * */ if (!hi) return MODE_ERROR_ETH; // non-ethernet config->xconnect = 0; config->bridge = 1; config->bd_index = bd_index; // Enable forwarding, flooding, learning and ARP termination by default // (note that ARP term is disabled on BD feature bitmap by default) config->feature_bitmap |= L2INPUT_FEAT_FWD | L2INPUT_FEAT_UU_FLOOD | L2INPUT_FEAT_FLOOD | L2INPUT_FEAT_LEARN | L2INPUT_FEAT_ARP_TERM; // Make sure last-chance drop is configured config->feature_bitmap |= L2INPUT_FEAT_DROP; // Make sure xconnect is disabled config->feature_bitmap &= ~L2INPUT_FEAT_XCONNECT; // Set up bridge domain vec_validate(mp->bd_configs, bd_index); bd_config = vec_elt_at_index(mp->bd_configs, bd_index); bd_validate (bd_config); // TODO: think: add l2fib entry even for non-bvi interface? // Do BVI interface initializations if (bvi) { // insure BD has no bvi interface (or replace that one with this??) if (bd_config->bvi_sw_if_index != ~0) { return MODE_ERROR_BVI_DEF; // bd already has a bvi interface } bd_config->bvi_sw_if_index = sw_if_index; config->bvi = 1; // make BVI outputs go to l2-input bd_config->saved_bvi_output_node_index = hi->output_node_index; hi->output_node_index = l2input_node.index; // create the l2fib entry for the bvi interface mac = *((u64 *)hi->hw_address); l2fib_add_entry (mac, bd_index, sw_if_index, 1, 0, 1); // static + bvi // Disable learning by default. no use since l2fib entry is static. config->feature_bitmap &= ~L2INPUT_FEAT_LEARN; // Add BVI to arp_input_next_index_by_hw_if_index table so arp-input // node can send out ARP response via BVI to BD ethernet_arp_hw_interface_link_up_down(vnet_main, hi->hw_if_index, 0); } // Add interface to bridge-domain flood vector member.sw_if_index = sw_if_index; member.flags = bvi ? L2_FLOOD_MEMBER_BVI : L2_FLOOD_MEMBER_NORMAL; member.shg = shg; bd_add_member (bd_config, &member); } else { config->xconnect = 1; config->bridge = 0; config->output_sw_if_index = xc_sw_if_index; // Make sure last-chance drop is configured config->feature_bitmap |= L2INPUT_FEAT_DROP; // Make sure bridging features are disabled config->feature_bitmap &= ~(L2INPUT_FEAT_LEARN | L2INPUT_FEAT_FWD | L2INPUT_FEAT_FLOOD); config->feature_bitmap |= L2INPUT_FEAT_XCONNECT; shg = 0; // not used in xconnect } // set up split-horizon group config->shg = shg; out_config = l2output_intf_config (sw_if_index); out_config->shg = shg; // Test: remove this when non-IP features can be configured. // Enable a non-IP feature to test IP feature masking // config->feature_bitmap |= L2INPUT_FEAT_CTRL_PKT; l2_if_adjust++; } // Adjust count of L2 interfaces hi->l2_if_count += l2_if_adjust; if (hi->hw_class_index == ethernet_hw_interface_class.index) { if ((hi->l2_if_count == 1) && (l2_if_adjust == 1)) { // Just added first L2 interface on this port // Set promiscuous mode on the l2 interface ethernet_set_flags (vnet_main, hi->hw_if_index, ETHERNET_INTERFACE_FLAG_ACCEPT_ALL); // Insure all packets go to ethernet-input ethernet_set_rx_redirect (vnet_main, hi, 1); } else if ((hi->l2_if_count == 0) && (l2_if_adjust == -1)) { // Just removed only L2 subinterface on this port // Disable promiscuous mode on the l2 interface ethernet_set_flags (vnet_main, hi->hw_if_index, 0); // Allow ip packets to go directly to ip4-input etc ethernet_set_rx_redirect (vnet_main, hi, 0); } } // Set up the L2/L3 flag in the interface parsing tables ethernet_sw_interface_set_l2_mode(vnm, sw_if_index, (mode!=MODE_L3)); return 0; } // set subinterface in bridging mode with a bridge-domain ID // The CLI format is: // set interface l2 bridge [bvi] [split-horizon-group] static clib_error_t * int_l2_bridge (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd) { vnet_main_t * vnm = vnet_get_main(); clib_error_t * error = 0; u32 bd_index, bd_id; u32 sw_if_index; u32 bvi; u32 rc; u32 shg; if (! unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index)) { error = clib_error_return (0, "unknown interface `%U'", format_unformat_error, input); goto done; } if (!unformat (input, "%d", &bd_id)) { error = clib_error_return (0, "expected bridge domain ID `%U'", format_unformat_error, input); goto done; } bd_index = bd_find_or_add_bd_index (&bd_main, bd_id); // optional bvi bvi = unformat (input, "bvi"); // optional split horizon group shg = 0; (void) unformat (input, "%d", &shg); // set the interface mode if ((rc = set_int_l2_mode(vm, vnm, MODE_L2_BRIDGE, sw_if_index, bd_index, bvi, shg, 0))) { if (rc == MODE_ERROR_ETH) { error = clib_error_return (0, "bridged interface must be ethernet", format_unformat_error, input); } else if (rc == MODE_ERROR_BVI_DEF) { error = clib_error_return (0, "bridge-domain already has a bvi interface", format_unformat_error, input); } else { error = clib_error_return (0, "invalid configuration for interface", format_unformat_error, input); } goto done; } done: return error; } VLIB_CLI_COMMAND (int_l2_bridge_cli, static) = { .path = "set interface l2 bridge", .short_help = "set interface to L2 bridging mode in [bvi] [shg]", .function = int_l2_bridge, }; // set subinterface in xconnect mode with another interface // The CLI format is: // set interface l2 xconnect static clib_error_t * int_l2_xc (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd) { vnet_main_t * vnm = vnet_get_main(); clib_error_t * error = 0; u32 sw_if_index; u32 xc_sw_if_index; if (! unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index)) { error = clib_error_return (0, "unknown interface `%U'", format_unformat_error, input); goto done; } if (! unformat_user (input, unformat_vnet_sw_interface, vnm, &xc_sw_if_index)) { error = clib_error_return (0, "unknown peer interface `%U'", format_unformat_error, input); goto done; } // set the interface mode if (set_int_l2_mode(vm, vnm, MODE_L2_XC, sw_if_index, 0, 0, 0, xc_sw_if_index)) { error = clib_error_return (0, "invalid configuration for interface", format_unformat_error, input); goto done; } done: return error; } VLIB_CLI_COMMAND (int_l2_xc_cli, static) = { .path = "set interface l2 xconnect", .short_help = "set interface to L2 cross-connect mode with ", .function = int_l2_xc, }; // set subinterface in L3 mode // The CLI format is: // set interface l3 static clib_error_t * int_l3 (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd) { vnet_main_t * vnm = vnet_get_main(); clib_error_t * error = 0; u32 sw_if_index; if (! unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index)) { error = clib_error_return (0, "unknown interface `%U'", format_unformat_error, input); goto done; } // set the interface mode if (set_int_l2_mode(vm, vnm, MODE_L3, sw_if_index, 0, 0, 0, 0)) { error = clib_error_return (0, "invalid configuration for interface", format_unformat_error, input); goto done; } done: return error; } VLIB_CLI_COMMAND (int_l3_cli, static) = { .path = "set interface l3", .short_help = "set interface to L3 mode", .function = int_l3, }; // The CLI format is: // show mode [ ...] static clib_error_t * show_int_mode (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd) { vnet_main_t * vnm = vnet_get_main(); clib_error_t * error = 0; char * mode; u8 * args; vnet_interface_main_t * im = &vnm->interface_main; vnet_sw_interface_t * si, * sis = 0; l2input_main_t * mp = &l2input_main; l2_input_config_t * config; while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) { u32 sw_if_index; /* See if user wants to show specific interface */ if (unformat (input, "%U", unformat_vnet_sw_interface, vnm, &sw_if_index)) { si = pool_elt_at_index (im->sw_interfaces, sw_if_index); vec_add1 (sis, si[0]); } else { error = clib_error_return (0, "unknown input `%U'", format_unformat_error, input); goto done; } } if (vec_len (sis) == 0) /* Get all interfaces */ { /* Gather interfaces. */ sis = vec_new (vnet_sw_interface_t, pool_elts (im->sw_interfaces)); _vec_len (sis) = 0; pool_foreach (si, im->sw_interfaces, ({ vec_add1 (sis, si[0]); })); } vec_foreach (si, sis) { vec_validate(mp->configs, si->sw_if_index); config = vec_elt_at_index(mp->configs, si->sw_if_index); if (config->bridge) { u32 bd_id; mode = "l2 bridge"; bd_id = l2input_main.bd_configs[config->bd_index].bd_id; args = format (0, "bd_id %d%s%d", bd_id, config->bvi ? " bvi shg " : " shg ", config->shg); } else if (config->xconnect) { mode = "l2 xconnect"; args = format (0, "%U", format_vnet_sw_if_index_name, vnm, config->output_sw_if_index); } else { mode = "l3"; args = format (0, " "); } vlib_cli_output (vm, "%s %U %v\n", mode, format_vnet_sw_if_index_name, vnm, si->sw_if_index, args); vec_free (args); } done: vec_free (sis); return error; } VLIB_CLI_COMMAND (show_l2_mode, static) = { .path = "show mode", .short_help = "show mode [ ...]", .function = show_int_mode, }; #define foreach_l2_init_function \ _(feat_bitmap_drop_init) \ _(l2fib_init) \ _(l2_classify_init) \ _(l2bd_init) \ _(l2fwd_init) \ _(l2_inacl_init) \ _(l2input_init) \ _(l2_vtr_init) \ _(l2_invtr_init) \ _(l2_efp_filter_init) \ _(l2learn_init) \ _(l2flood_init) \ _(l2_outacl_init) \ _(l2output_init) \ _(l2_patch_init) \ _(l2_xcrw_init) clib_error_t *l2_init (vlib_main_t * vm) { clib_error_t * error; #define _(a) do { \ if ((error = vlib_call_init_function (vm, a))) return error; } \ while (0); foreach_l2_init_function; #undef _ return 0; } VLIB_INIT_FUNCTION (l2_init);