diff options
Diffstat (limited to 'vnet/vnet/l2/l2_input.c')
| -rw-r--r-- | vnet/vnet/l2/l2_input.c | 963 |
1 files changed, 963 insertions, 0 deletions
diff --git a/vnet/vnet/l2/l2_input.c b/vnet/vnet/l2/l2_input.c new file mode 100644 index 00000000000..34f8a77184f --- /dev/null +++ b/vnet/vnet/l2/l2_input.c @@ -0,0 +1,963 @@ +/* + * 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 <vlib/vlib.h> +#include <vnet/vnet.h> +#include <vnet/pg/pg.h> +#include <vnet/ethernet/ethernet.h> +#include <vnet/ethernet/packet.h> +#include <vnet/ip/ip_packet.h> +#include <vnet/ip/ip4_packet.h> +#include <vnet/ip/ip6_packet.h> +#include <vlib/cli.h> +#include <vnet/l2/l2_input.h> +#include <vnet/l2/l2_output.h> +#include <vnet/l2/feat_bitmap.h> +#include <vnet/l2/l2_bvi.h> +#include <vnet/l2/l2_fib.h> + +#include <vppinfra/error.h> +#include <vppinfra/hash.h> +#include <vppinfra/cache.h> + +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 <interface> <bd> [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 <bridge-domain ID> [bvi] [shg]", + .function = int_l2_bridge, +}; + +// set subinterface in xconnect mode with another interface +// The CLI format is: +// set interface l2 xconnect <interface> <peer interface> +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 <peer interface>", + .function = int_l2_xc, +}; + +// set subinterface in L3 mode +// The CLI format is: +// set interface l3 <interface> +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 [<if-name1> <if-name2> ...] +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 [<if-name1> <if-name2> ...]", + .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); |