/* * 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 #include #include #include /** * @file * @brief Interface Input Mode (Layer 2 Cross-Connect or Bridge / Layer 3). * * This file contains the CLI Commands that modify the input mode of an * interface. For interfaces in a Layer 2 cross-connect, all packets * received on one interface will be transmitted to the other. For * interfaces in a bridge-domain, packets will be forwarded to other * interfaces in the same bridge-domain based on destination mac address. * For interfaces in Layer 3 mode, the packets will be routed. */ #ifndef CLIB_MARCH_VARIANT /* 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; } u8 * format_l2_input_features (u8 * s, va_list * args) { static char *display_names[] = { #define _(sym,name) #sym, foreach_l2input_feat #undef _ }; u32 feature_bitmap = va_arg (*args, u32); u32 verbose = va_arg (*args, u32); if (feature_bitmap == 0) { s = format (s, " none configured"); return s; } feature_bitmap &= ~L2INPUT_FEAT_DROP; /* Not a feature */ int i; for (i = L2INPUT_N_FEAT; i >= 0; i--) { if (feature_bitmap & (1 << i)) { if (verbose) s = format (s, "%17s (%s)\n", display_names[i], l2input_feat_names[i]); else s = format (s, "%s ", l2input_feat_names[i]); } } return s; } #endif /* CLIB_MARCH_VARIANT */ 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; } extern l2input_main_t l2input_main; #ifndef CLIB_MARCH_VARIANT l2input_main_t l2input_main; #endif /* CLIB_MARCH_VARIANT */ #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 (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 */ u32 feat_mask = ~0; u32 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX]; ethernet_header_t *h0 = vlib_buffer_get_current (b0); /* Get config for the input interface */ l2_input_config_t *config = vec_elt_at_index (msm->configs, sw_if_index0); /* Save split horizon group */ vnet_buffer (b0)->l2.shg = config->shg; /* determine layer2 kind for stat and mask */ if (PREDICT_FALSE (ethernet_address_cast (h0->dst_address))) { u8 *l3h0 = (u8 *) h0 + vnet_buffer (b0)->l2.l2_len; #define get_u16(addr) ( *((u16 *)(addr)) ) u16 ethertype = clib_net_to_host_u16 (get_u16 (l3h0 - 2)); u8 protocol = ((ip6_header_t *) l3h0)->protocol; /* Disable bridge forwarding (flooding will execute instead if not xconnect) */ feat_mask &= ~(L2INPUT_FEAT_FWD | L2INPUT_FEAT_UU_FLOOD | L2INPUT_FEAT_UU_FWD | L2INPUT_FEAT_GBP_FWD); /* Disable ARP-term for non-ARP and non-ICMP6 packet */ if (ethertype != ETHERNET_TYPE_ARP && (ethertype != ETHERNET_TYPE_IP6 || protocol != IP_PROTOCOL_ICMP6)) feat_mask &= ~(L2INPUT_FEAT_ARP_TERM); /* * For packet from BVI - set SHG of ARP request or ICMPv6 neighbor * solicitation packet from BVI to 0 so it can also flood to VXLAN * tunnels or other ports with the same SHG as that of the BVI. */ else if (PREDICT_FALSE (vnet_buffer (b0)->sw_if_index[VLIB_TX] == L2INPUT_BVI)) { if (ethertype == ETHERNET_TYPE_ARP) { ethernet_arp_header_t *arp0 = (ethernet_arp_header_t *) l3h0; if (arp0->opcode == clib_host_to_net_u16 (ETHERNET_ARP_OPCODE_request)) vnet_buffer (b0)->l2.shg = 0; } else /* must be ICMPv6 */ { ip6_header_t *iph0 = (ip6_header_t *) l3h0; icmp6_neighbor_solicitation_or_advertisement_header_t *ndh0; ndh0 = ip6_next_header (iph0); if (ndh0->icmp.type == ICMP6_neighbor_solicitation) vnet_buffer (b0)->l2.shg = 0; } } } else { /* * For packet from BVI - set SHG of unicast packet from BVI to 0 so it * is not dropped on output to VXLAN tunnels or other ports with the * same SHG as that of the BVI. */ if (PREDICT_FALSE (vnet_buffer (b0)->sw_if_index[VLIB_TX] == L2INPUT_BVI)) vnet_buffer (b0)->l2.shg = 0; } if (config->bridge) { /* Do bridge-domain processing */ u16 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 */ l2_bridge_domain_t *bd_config = vec_elt_at_index (msm->bd_configs, bd_index0); /* Save bridge domain and interface seq_num */ /* *INDENT-OFF* */ l2fib_seq_num_t sn = { .swif = *l2fib_swif_seq_num(sw_if_index0), .bd = bd_config->seq_num, }; /* *INDENT-ON* */ vnet_buffer (b0)->l2.l2fib_sn = sn.as_u16;; vnet_buffer (b0)->l2.bd_age = bd_config->mac_age; /* * 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; } else if (config->xconnect) { /* Set the output interface */ vnet_buffer (b0)->sw_if_index[VLIB_TX] = config->output_sw_if_index; } else feat_mask = L2INPUT_FEAT_DROP; /* mask out features from bitmap using packet type and bd config */ u32 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_always_inline uword l2input_node_inline (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame, int do_trace) { u32 n_left_from, *from, *to_next; l2input_next_t next_index; l2input_main_t *msm = &l2input_main; 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 >= 8 && n_left_to_next >= 4) { u32 bi0, bi1, bi2, bi3; vlib_buffer_t *b0, *b1, *b2, *b3; u32 next0, next1, next2, next3; u32 sw_if_index0, sw_if_index1, sw_if_index2, sw_if_index3; /* Prefetch next iteration. */ { vlib_buffer_t *p4, *p5, *p6, *p7; p4 = vlib_get_buffer (vm, from[4]); p5 = vlib_get_buffer (vm, from[5]); p6 = vlib_get_buffer (vm, from[6]); p7 = vlib_get_buffer (vm, from[7]); /* Prefetch the buffer header and packet for the N+2 loop iteration */ vlib_prefetch_buffer_header (p4, LOAD); vlib_prefetch_buffer_header (p5, LOAD); vlib_prefetch_buffer_header (p6, LOAD); vlib_prefetch_buffer_header (p7, LOAD); CLIB_PREFETCH (p4->data, CLIB_CACHE_LINE_BYTES, STORE); CLIB_PREFETCH (p5->data, CLIB_CACHE_LINE_BYTES, STORE); CLIB_PREFETCH (p6->data, CLIB_CACHE_LINE_BYTES, STORE); CLIB_PREFETCH (p7->data, CLIB_CACHE_LINE_BYTES, STORE); /* * 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]; to_next[2] = bi2 = from[2]; to_next[3] = bi3 = from[3]; from += 4; to_next += 4; n_left_from -= 4; n_left_to_next -= 4; b0 = vlib_get_buffer (vm, bi0); b1 = vlib_get_buffer (vm, bi1); b2 = vlib_get_buffer (vm, bi2); b3 = vlib_get_buffer (vm, bi3); if (do_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]; sw_if_index2 = vnet_buffer (b2)->sw_if_index[VLIB_RX]; sw_if_index3 = vnet_buffer (b3)->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; clib_memcpy_fast (t->src, h0->src_address, 6); clib_memcpy_fast (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; clib_memcpy_fast (t->src, h1->src_address, 6); clib_memcpy_fast (t->dst, h1->dst_address, 6); } if (b2->flags & VLIB_BUFFER_IS_TRACED) { ethernet_header_t *h2 = vlib_buffer_get_current (b2); l2input_trace_t *t = vlib_add_trace (vm, node, b2, sizeof (*t)); t->sw_if_index = sw_if_index2; clib_memcpy_fast (t->src, h2->src_address, 6); clib_memcpy_fast (t->dst, h2->dst_address, 6); } if (b3->flags & VLIB_BUFFER_IS_TRACED) { ethernet_header_t *h3 = vlib_buffer_get_current (b3); l2input_trace_t *t = vlib_add_trace (vm, node, b3, sizeof (*t)); t->sw_if_index = sw_if_index3; clib_memcpy_fast (t->src, h3->src_address, 6); clib_memcpy_fast (t->dst, h3->dst_address, 6); } } classify_and_dispatch (msm, b0, &next0); classify_and_dispatch (msm, b1, &next1); classify_and_dispatch (msm, b2, &next2); classify_and_dispatch (msm, b3, &next3); /* verify speculative enqueues, maybe switch current next frame */ /* if next0==next1==next_index then nothing special needs to be done */ vlib_validate_buffer_enqueue_x4 (vm, node, next_index, to_next, n_left_to_next, bi0, bi1, bi2, bi3, next0, next1, next2, next3); } 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 (do_trace && PREDICT_FALSE (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; clib_memcpy_fast (t->src, h0->src_address, 6); clib_memcpy_fast (t->dst, h0->dst_address, 6); } classify_and_dispatch (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); } vlib_node_increment_counter (vm, l2input_node.index, L2INPUT_ERROR_L2INPUT, frame->n_vectors); return frame->n_vectors; } VLIB_NODE_FN (l2input_node) (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) { if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE))) return l2input_node_inline (vm, node, frame, 1 /* do_trace */ ); return l2input_node_inline (vm, node, frame, 0 /* do_trace */ ); } /* *INDENT-OFF* */ VLIB_REGISTER_NODE (l2input_node) = { .name = "l2-input", .vector_size = sizeof (u32), .format_trace = format_l2input_trace, .format_buffer = format_ethernet_header_with_length, .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", }, }; /* *INDENT-ON* */ #ifndef CLIB_MARCH_VARIANT 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, l2input_feat_masks_t feature_bitmap, u32 enable) { l2_input_config_t *config = l2input_intf_config (sw_if_index); if (enable) config->feature_bitmap |= feature_bitmap; else config->feature_bitmap &= ~feature_bitmap; return config->feature_bitmap; } u32 l2input_set_bridge_features (u32 bd_index, u32 feat_mask, u32 feat_value) { l2_bridge_domain_t *bd_config = l2input_bd_config (bd_index);; bd_validate (bd_config); bd_config->feature_bitmap = (bd_config->feature_bitmap & ~feat_mask) | feat_value; return bd_config->feature_bitmap; } void l2input_interface_mac_change (u32 sw_if_index, const u8 * old_address, const u8 * new_address) { /* check if the sw_if_index passed is a BVI in a BD */ l2_input_config_t *intf_config; intf_config = l2input_intf_config (sw_if_index); if (intf_config->bridge && intf_config->bvi) { /* delete and re-add l2fib entry for the bvi interface */ l2fib_del_entry (old_address, intf_config->bd_index, sw_if_index); l2fib_add_entry (new_address, intf_config->bd_index, sw_if_index, L2FIB_ENTRY_RESULT_FLAG_BVI | L2FIB_ENTRY_RESULT_FLAG_STATIC); } } /** * 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, /* One of L2 modes or back to L3 mode */ u32 sw_if_index, /* sw interface index */ u32 bd_index, /* for bridged interface */ l2_bd_port_type_t port_type, /* port_type */ u32 shg, /* the bridged interface split horizon group */ u32 xc_sw_if_index) /* peer interface for xconnect */ { l2input_main_t *mp = &l2input_main; l2output_main_t *l2om = &l2output_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; i32 l2_if_adjust = 0; vnet_device_class_t *dev_class; hi = vnet_get_sup_hw_interface (vnet_main, sw_if_index); config = l2input_intf_config (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) { vnet_sw_interface_t *si; bd_config->bvi_sw_if_index = ~0; config->bvi = 0; /* delete the l2fib entry for the bvi interface */ l2fib_del_entry (hi->hw_address, config->bd_index, sw_if_index); /* since this is a no longer BVI interface do not to flood to it */ si = vnet_get_sw_interface (vnm, sw_if_index); si->flood_class = VNET_FLOOD_CLASS_NO_FLOOD; } if (bd_config->uu_fwd_sw_if_index == sw_if_index) { bd_config->uu_fwd_sw_if_index = ~0; bd_config->feature_bitmap &= ~L2INPUT_FEAT_UU_FWD; } /* Clear MACs learned on the interface */ if ((config->feature_bitmap & L2INPUT_FEAT_LEARN) || (bd_config->feature_bitmap & L2INPUT_FEAT_LEARN)) l2fib_flush_int_mac (vm, sw_if_index); l2_if_adjust--; } else if (config->xconnect) { l2_if_adjust--; } /* Make sure vector is big enough */ vec_validate_init_empty (l2om->output_node_index_vec, sw_if_index, L2OUTPUT_NEXT_DROP); /* Initialize the l2-input configuration for the interface */ if (mode == MODE_L3) { /* Set L2 config to BD index 0 so that if any packet accidentally * came in on L2 path, it will be dropped in BD 0 */ config->xconnect = 0; config->bridge = 0; config->shg = 0; config->bd_index = 0; config->feature_bitmap = L2INPUT_FEAT_DROP; /* Clear L2 output config */ out_config = l2output_intf_config (sw_if_index); clib_memset (out_config, 0, sizeof (l2_output_config_t)); /* Make sure any L2-output packet to this interface now in L3 mode is * dropped. This may happen if L2 FIB MAC entry is stale */ l2om->output_node_index_vec[sw_if_index] = L2OUTPUT_NEXT_BAD_INTF; } else { /* Add or update l2-output node next-arc and output_node_index_vec table * for the interface */ l2output_create_output_node_mapping (vm, vnet_main, sw_if_index); if (mode == MODE_L2_BRIDGE) { u8 member_flags; /* * 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; *l2fib_valid_swif_seq_num (sw_if_index) += 1; /* * 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_UU_FWD | 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 */ bd_config = l2input_bd_config (bd_index); bd_validate (bd_config); /* TODO: think: add l2fib entry even for non-bvi interface? */ /* Do BVI interface initializations */ if (L2_BD_PORT_TYPE_BVI == port_type) { vnet_sw_interface_t *si; /* ensure 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; /* create the l2fib entry for the bvi interface */ l2fib_add_entry (hi->hw_address, bd_index, sw_if_index, L2FIB_ENTRY_RESULT_FLAG_BVI | L2FIB_ENTRY_RESULT_FLAG_STATIC); /* Disable learning by default. no use since l2fib entry is static. */ config->feature_bitmap &= ~L2INPUT_FEAT_LEARN; /* since this is a BVI interface we want to flood to it */ si = vnet_get_sw_interface (vnm, sw_if_index); si->flood_class = VNET_FLOOD_CLASS_BVI; member_flags = L2_FLOOD_MEMBER_BVI; } else if (L2_BD_PORT_TYPE_UU_FWD == port_type) { bd_config->uu_fwd_sw_if_index = sw_if_index; bd_config->feature_bitmap |= L2INPUT_FEAT_UU_FWD; } else { member_flags = L2_FLOOD_MEMBER_NORMAL; } if (L2_BD_PORT_TYPE_NORMAL == port_type || L2_BD_PORT_TYPE_BVI == port_type) { /* Add interface to bridge-domain flood vector */ l2_flood_member_t member = { .sw_if_index = sw_if_index, .flags = member_flags, .shg = shg, }; bd_add_member (bd_config, &member); } } else if (mode == MODE_L2_XC) { 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 */ } 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_INPUT_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); } /* set up split-horizon group and set output feature bit */ config->shg = shg; out_config = l2output_intf_config (sw_if_index); out_config->shg = shg; out_config->feature_bitmap |= L2OUTPUT_FEAT_OUTPUT; /* * 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); /* ensure 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)); dev_class = vnet_get_device_class (vnet_main, hi->dev_class_index); if (dev_class->set_l2_mode_function) { dev_class->set_l2_mode_function (vnet_main, hi, l2_if_adjust); } return 0; } #endif /* CLIB_MARCH_VARIANT */ /** * 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 (); l2_bd_port_type_t port_type; clib_error_t *error = 0; u32 bd_index, bd_id; u32 sw_if_index; 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; } if (bd_id > L2_BD_ID_MAX) { error = clib_error_return (0, "bridge domain ID exceed 16M limit", format_unformat_error, input); goto done; } bd_index = bd_find_or_add_bd_index (&bd_main, bd_id); /* optional bvi */ port_type = L2_BD_PORT_TYPE_NORMAL; if (unformat (input, "bvi")) port_type = L2_BD_PORT_TYPE_BVI; if (unformat (input, "uu-fwd")) port_type = L2_BD_PORT_TYPE_UU_FWD; /* 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, port_type, 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; } /*? * Use this command put an interface into Layer 2 bridge domain. If a * bridge-domain with the provided bridge-domain-id does not exist, it * will be created. Interfaces in a bridge-domain forward packets to * other interfaces in the same bridge-domain based on destination mac * address. To remove an interface from a the Layer 2 bridge domain, * put the interface in a different mode, for example Layer 3 mode. * * Optionally, an interface can be added to a Layer 2 bridge-domain as * a Bridged Virtual Interface (bvi). Only one interface in a Layer 2 * bridge-domain can be a bvi. * * Optionally, a split-horizon group can also be specified. This defaults * to 0 if not specified. * * @cliexpar * Example of how to configure a Layer 2 bridge-domain with three * interfaces (where 200 is the bridge-domain-id): * @cliexcmd{set interface l2 bridge GigabitEthernet0/8/0.200 200} * This interface is added a BVI interface: * @cliexcmd{set interface l2 brid } 
/*
 * Copyright (c) 2015 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.
 */
/*
 * main.h: VLIB main data structure
 *
 * Copyright (c) 2008 Eliot Dresselhaus
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 *  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 *  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 *  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 *  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 *  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 *  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

#ifndef included_vlib_main_h
#define included_vlib_main_h

#include <vppinfra/callback_data.h>
#include <vppinfra/elog.h>
#include <vppinfra/format.h>
#include <vppinfra/longjmp.h>
#include <vppinfra/pool.h>
#include <vppinfra/random_buffer.h>
#include <vppinfra/time.h>

#include <pthread.h>


/* By default turn off node/error event logging.
   Override with -DVLIB_ELOG_MAIN_LOOP */
#ifndef VLIB_ELOG_MAIN_LOOP
#define VLIB_ELOG_MAIN_LOOP 0
#endif

typedef struct
{
  u8 trace_filter_enable;
  u32 classify_table_index;
} vlib_trace_filter_t;

typedef enum
{
  VLIB_NODE_RUNTIME_PERF_BEFORE,
  VLIB_NODE_RUNTIME_PERF_AFTER,
  VLIB_NODE_RUNTIME_PERF_RESET,
} vlib_node_runtime_perf_call_type_t;

typedef struct
{
  struct vlib_main_t *vm;
  vlib_node_runtime_t *node;
  vlib_frame_t *frame;
  uword packets;
  u64 cpu_time_now;
  vlib_node_runtime_perf_call_type_t call_type;
} vlib_node_runtime_perf_callback_args_t;

struct vlib_node_runtime_perf_callback_data_t;

typedef void (*vlib_node_runtime_perf_callback_fp_t)
  (struct vlib_node_runtime_perf_callback_data_t * data,
   vlib_node_runtime_perf_callback_args_t * args);

typedef struct vlib_node_runtime_perf_callback_data_t
{
  vlib_node_runtime_perf_callback_fp_t fp;
  union
  {
    void *v;
    u64 u;
  } u[3];
} vlib_node_runtime_perf_callback_data_t;

clib_callback_data_typedef (vlib_node_runtime_perf_callback_set_t,
			    vlib_node_runtime_perf_callback_data_t);

typedef struct vlib_main_t
{
  CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
  /* Instruction level timing state. */
  clib_time_t clib_time;
  /* Offset from main thread time */
  f64 time_offset;
  f64 time_last_barrier_release;

  /* Time stamp of last node dispatch. */
  u64 cpu_time_last_node_dispatch;

  /* Time stamp when main loop was entered (time 0). */
  u64 cpu_time_main_loop_start;

  /* Incremented once for each main loop. */