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Diffstat (limited to 'src/vnet/l2/l2_input.c')
| -rw-r--r-- | src/vnet/l2/l2_input.c | 1116 |
1 files changed, 1116 insertions, 0 deletions
diff --git a/src/vnet/l2/l2_input.c b/src/vnet/l2/l2_input.c new file mode 100644 index 00000000000..a104ec9eebb --- /dev/null +++ b/src/vnet/l2/l2_input.c @@ -0,0 +1,1116 @@ +/* + * 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> + +/** + * @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. + */ + +/* 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; + +#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 + */ + + 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; + +#define get_u16(addr) ( *((u16 *)(addr)) ) + + 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; + + ethertype = clib_net_to_host_u16 (get_u16 (l3h0 - 2)); + feat_mask = ~0; + + /* Get config for the input interface */ + 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))) + { + 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); + + /* 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); + } + else + { + /* + * Check for from-BVI processing - set SHG of unicast packets from BVI + * to 0 so it is not dropped for 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->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; + 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 >= 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 (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]; + 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 (t->src, h0->src_address, 6); + clib_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; + clib_memcpy (t->src, h1->src_address, 6); + clib_memcpy (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 (t->src, h2->src_address, 6); + clib_memcpy (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 (t->src, h3->src_address, 6); + clib_memcpy (t->dst, h3->dst_address, 6); + } + } + + vlib_node_increment_counter (vm, l2input_node.index, + L2INPUT_ERROR_L2INPUT, 4); + + classify_and_dispatch (vm, node, cpu_index, msm, b0, &next0); + classify_and_dispatch (vm, node, cpu_index, msm, b1, &next1); + classify_and_dispatch (vm, node, cpu_index, msm, b2, &next2); + classify_and_dispatch (vm, node, cpu_index, 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 (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; + clib_memcpy (t->src, h0->src_address, 6); + clib_memcpy (t->dst, h0->dst_address, 6); + } + + vlib_node_increment_counter (vm, l2input_node.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; +} + + +/* *INDENT-OFF* */ +VLIB_REGISTER_NODE (l2input_node) = { + .function = l2input_node_fn, + .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* */ + +VLIB_NODE_FUNCTION_MULTIARCH (l2input_node, l2input_node_fn) + 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; +} + +u32 +l2input_set_bridge_features (u32 bd_index, u32 feat_mask, u32 feat_value) +{ + l2_bridge_domain_t *bd_config; + vec_validate (l2input_main.bd_configs, bd_index); + bd_config = vec_elt_at_index (l2input_main.bd_configs, bd_index); + bd_validate (bd_config); + bd_config->feature_bitmap = + (bd_config->feature_bitmap & ~feat_mask) | feat_value; + return bd_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; + 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; + l2_flood_member_t member; + u64 mac; + i32 l2_if_adjust = 0; + u32 slot; + + 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) + { + bd_config->bvi_sw_if_index = ~0; + config->bvi = 0; + + /* delete the l2fib entry for the bvi interface */ + mac = *((u64 *) hi->hw_address); + l2fib_del_entry (mac, config->bd_index); + + /* Make loop output node send packet back to ethernet-input node */ + slot = + vlib_node_add_named_next_with_slot (vm, hi->tx_node_index, + "ethernet-input", + VNET_SIMULATED_ETHERNET_TX_NEXT_ETHERNET_INPUT); + ASSERT (slot == VNET_SIMULATED_ETHERNET_TX_NEXT_ETHERNET_INPUT); + } + l2_if_adjust--; + } + else if (config->xconnect) + { + l2_if_adjust--; + } + + /* + * Directs the l2 output path to work out the interface + * output next-arc itself. Needed when recycling a sw_if_index. + */ + vec_validate_init_empty (l2om->next_nodes.output_node_index_vec, + sw_if_index, ~0); + l2om->next_nodes.output_node_index_vec[sw_if_index] = ~0; + + /* 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; + + /* 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->next_nodes.output_node_index_vec[sw_if_index] = + L2OUTPUT_NEXT_BAD_INTF; + } + 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); + } + 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) + { + /* 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 */ + 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; + + /* Make loop output node send packet to l2-input node */ + slot = + vlib_node_add_named_next_with_slot (vm, hi->tx_node_index, + "l2-input", + VNET_SIMULATED_ETHERNET_TX_NEXT_ETHERNET_INPUT); + ASSERT (slot == VNET_SIMULATED_ETHERNET_TX_NEXT_ETHERNET_INPUT); + } + + /* 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); + + /* 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)); + + 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; +} + +/*? + * 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 bridge GigabitEthernet0/9/0.200 200 bvi} + * This interface also has a split-horizon group of 1 specified: + * @cliexcmd{set interface l2 bridge GigabitEthernet0/a/0.200 200 1} + * Example of how to remove an interface from a Layer2 bridge-domain: + * @cliexcmd{set interface l3 GigabitEthernet0/a/0.200} +?*/ +/* *INDENT-OFF* */ +VLIB_CLI_COMMAND (int_l2_bridge_cli, static) = { + .path = "set interface l2 bridge", + .short_help = "set interface l2 bridge <interface> <bridge-domain-id> [bvi] [shg]", + .function = int_l2_bridge, +}; +/* *INDENT-ON* */ + +/** + * 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; +} + +/*? + * Use this command put an interface into Layer 2 cross-connect mode. + * Both interfaces must be in this mode for bi-directioal traffic. All + * packets received on one interface will be transmitted to the other. + * To remove the Layer 2 cross-connect, put the interface in a different + * mode, for example Layer 3 mode. + * + * @cliexpar + * Example of how to configure a Layer2 cross-connect between two interfaces: + * @cliexcmd{set interface l2 xconnect GigabitEthernet0/8/0.300 GigabitEthernet0/9/0.300} + * @cliexcmd{set interface l2 xconnect GigabitEthernet0/9/0.300 GigabitEthernet0/8/0.300} + * Example of how to remove a Layer2 cross-connect: + * @cliexcmd{set interface l3 GigabitEthernet0/8/0.300} + * @cliexcmd{set interface l3 GigabitEthernet0/9/0.300} +?*/ +/* *INDENT-OFF* */ +VLIB_CLI_COMMAND (int_l2_xc_cli, static) = { + .path = "set interface l2 xconnect", + .short_help = "set interface l2 xconnect <interface> <peer interface>", + .function = int_l2_xc, +}; +/* *INDENT-ON* */ + +/** + * 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; +} + +/*? + * Modify the packet processing mode of the interface to Layer 3, which + * implies packets will be routed. This is the default mode of an interface. + * Use this command to remove an interface from a Layer 2 cross-connect or a + * Layer 2 bridge. + * + * @cliexpar + * Example of how to set the mode of an interface to Layer 3: + * @cliexcmd{set interface l3 GigabitEthernet0/8/0.200} +?*/ +/* *INDENT-OFF* */ + VLIB_CLI_COMMAND (int_l3_cli, static) = { + .path = "set interface l3", + .short_help = "set interface l3 <interface>", + .function = int_l3, +}; +/* *INDENT-ON* */ + +/** + * Show interface mode. + * 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; + /* *INDENT-OFF* */ + pool_foreach (si, im->sw_interfaces, ({ vec_add1 (sis, si[0]); })); + /* *INDENT-ON* */ + } + + 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; +} + +/*? + * Show the packet processing mode (Layer2 xcross-onnect, Layer 2 bridge, + * Layer 3 routed) of all interfaces and sub-interfaces, or limit the + * output to just the provided list of interfaces and sub-interfaces. + * The output shows the mode, the interface, and if the interface is + * a member of a bridge, the bridge-domain-id and the split horizen group (shg). + * + * @cliexpar + * Example of displaying the mode of all interfaces: + * @cliexstart{show mode} + * l3 local0 + * l3 GigabitEthernet0/8/0 + * l3 GigabitEthernet0/9/0 + * l3 GigabitEthernet0/a/0 + * l2 bridge GigabitEthernet0/8/0.200 bd_id 200 shg 0 + * l2 bridge GigabitEthernet0/9/0.200 bd_id 200 shg 0 + * l2 bridge GigabitEthernet0/a/0.200 bd_id 200 shg 0 + * l2 xconnect GigabitEthernet0/8/0.300 GigabitEthernet0/9/0.300 + * l2 xconnect GigabitEthernet0/9/0.300 GigabitEthernet0/8/0.300 + * @cliexend + * Example of displaying the mode of a seleted list of interfaces: + * @cliexstart{show mode GigabitEthernet0/8/0 GigabitEthernet0/8/0.200} + * l3 GigabitEthernet0/8/0 + * l2 bridge GigabitEthernet0/8/0.200 bd_id 200 shg 0 + * @cliexend +?*/ +/* *INDENT-OFF* */ +VLIB_CLI_COMMAND (show_l2_mode, static) = { + .path = "show mode", + .short_help = "show mode [<if-name1> <if-name2> ...]", + .function = show_int_mode, +}; +/* *INDENT-ON* */ + +#define foreach_l2_init_function \ +_(feat_bitmap_drop_init) \ +_(l2fib_init) \ +_(l2_input_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); + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ |