diff options
Diffstat (limited to 'vnet/vnet/l2/l2_fwd.c')
-rw-r--r-- | vnet/vnet/l2/l2_fwd.c | 544 |
1 files changed, 0 insertions, 544 deletions
diff --git a/vnet/vnet/l2/l2_fwd.c b/vnet/vnet/l2/l2_fwd.c deleted file mode 100644 index 710a9d9e8c3..00000000000 --- a/vnet/vnet/l2/l2_fwd.c +++ /dev/null @@ -1,544 +0,0 @@ -/* - * l2_fwd.c : layer 2 forwarding using l2fib - * - * 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 <vlib/cli.h> - -#include <vnet/l2/l2_input.h> -#include <vnet/l2/l2_bvi.h> -#include <vnet/l2/l2_fwd.h> -#include <vnet/l2/l2_fib.h> - -#include <vppinfra/error.h> -#include <vppinfra/hash.h> -#include <vppinfra/sparse_vec.h> - - -/** - * @file - * @brief Ethernet Forwarding. - * - * Code in this file handles forwarding Layer 2 packets. This file calls - * the FIB lookup, packet learning and the packet flooding as necessary. - * Packet is then sent to the next graph node. - */ - -typedef struct -{ - - /* Hash table */ - BVT (clib_bihash) * mac_table; - - /* next node index for the L3 input node of each ethertype */ - next_by_ethertype_t l3_next; - - /* convenience variables */ - vlib_main_t *vlib_main; - vnet_main_t *vnet_main; -} l2fwd_main_t; - -typedef struct -{ - /* per-pkt trace data */ - u8 src[6]; - u8 dst[6]; - u32 sw_if_index; - u16 bd_index; -} l2fwd_trace_t; - -/* packet trace format function */ -static u8 * -format_l2fwd_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 *); - l2fwd_trace_t *t = va_arg (*args, l2fwd_trace_t *); - - s = format (s, "l2-fwd: sw_if_index %d dst %U src %U bd_index %d", - t->sw_if_index, - format_ethernet_address, t->dst, - format_ethernet_address, t->src, t->bd_index); - return s; -} - -l2fwd_main_t l2fwd_main; - -static vlib_node_registration_t l2fwd_node; - -#define foreach_l2fwd_error \ -_(L2FWD, "L2 forward packets") \ -_(FLOOD, "L2 forward misses") \ -_(HIT, "L2 forward hits") \ -_(BVI_BAD_MAC, "BVI L3 MAC mismatch") \ -_(BVI_ETHERTYPE, "BVI packet with unhandled ethertype") \ -_(FILTER_DROP, "Filter Mac Drop") \ -_(REFLECT_DROP, "Reflection Drop") - -typedef enum -{ -#define _(sym,str) L2FWD_ERROR_##sym, - foreach_l2fwd_error -#undef _ - L2FWD_N_ERROR, -} l2fwd_error_t; - -static char *l2fwd_error_strings[] = { -#define _(sym,string) string, - foreach_l2fwd_error -#undef _ -}; - -typedef enum -{ - L2FWD_NEXT_L2_OUTPUT, - L2FWD_NEXT_FLOOD, - L2FWD_NEXT_DROP, - L2FWD_N_NEXT, -} l2fwd_next_t; - -/** Forward one packet based on the mac table lookup result. */ - -static_always_inline void -l2fwd_process (vlib_main_t * vm, - vlib_node_runtime_t * node, - l2fwd_main_t * msm, - vlib_error_main_t * em, - vlib_buffer_t * b0, - u32 sw_if_index0, l2fib_entry_result_t * result0, u32 * next0) -{ - if (PREDICT_FALSE (result0->raw == ~0)) - { - /* - * lookup miss, so flood - * TODO:replicate packet to each intf in bridge-domain - * For now just drop - */ - if (vnet_buffer (b0)->l2.feature_bitmap & L2INPUT_FEAT_UU_FLOOD) - { - *next0 = L2FWD_NEXT_FLOOD; - } - else - { - /* Flooding is disabled */ - b0->error = node->errors[L2FWD_ERROR_FLOOD]; - *next0 = L2FWD_NEXT_DROP; - } - - } - else - { - - /* lookup hit, forward packet */ -#ifdef COUNTERS - em->counters[node_counter_base_index + L2FWD_ERROR_HIT] += 1; -#endif - - vnet_buffer (b0)->sw_if_index[VLIB_TX] = result0->fields.sw_if_index; - *next0 = L2FWD_NEXT_L2_OUTPUT; - - /* perform reflection check */ - if (PREDICT_FALSE (sw_if_index0 == result0->fields.sw_if_index)) - { - b0->error = node->errors[L2FWD_ERROR_REFLECT_DROP]; - *next0 = L2FWD_NEXT_DROP; - - /* perform filter check */ - } - else if (PREDICT_FALSE (result0->fields.filter)) - { - b0->error = node->errors[L2FWD_ERROR_FILTER_DROP]; - *next0 = L2FWD_NEXT_DROP; - - /* perform BVI check */ - } - else if (PREDICT_FALSE (result0->fields.bvi)) - { - u32 rc; - rc = l2_to_bvi (vm, - msm->vnet_main, - b0, - vnet_buffer (b0)->sw_if_index[VLIB_TX], - &msm->l3_next, next0); - - if (PREDICT_FALSE (rc)) - { - if (rc == TO_BVI_ERR_BAD_MAC) - { - b0->error = node->errors[L2FWD_ERROR_BVI_BAD_MAC]; - *next0 = L2FWD_NEXT_DROP; - } - else if (rc == TO_BVI_ERR_ETHERTYPE) - { - b0->error = node->errors[L2FWD_ERROR_BVI_ETHERTYPE]; - *next0 = L2FWD_NEXT_DROP; - } - } - } - } -} - - -static uword -l2fwd_node_fn (vlib_main_t * vm, - vlib_node_runtime_t * node, vlib_frame_t * frame) -{ - u32 n_left_from, *from, *to_next; - l2fwd_next_t next_index; - l2fwd_main_t *msm = &l2fwd_main; - vlib_node_t *n = vlib_get_node (vm, l2fwd_node.index); - CLIB_UNUSED (u32 node_counter_base_index) = n->error_heap_index; - vlib_error_main_t *em = &vm->error_main; - l2fib_entry_key_t cached_key; - l2fib_entry_result_t cached_result; - - /* Clear the one-entry cache in case mac table was updated */ - cached_key.raw = ~0; - cached_result.raw = ~0; - - 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; - ethernet_header_t *h0, *h1, *h2, *h3; - l2fib_entry_key_t key0, key1, key2, key3; - l2fib_entry_result_t result0, result1, result2, result3; - u32 bucket0, bucket1, bucket2, bucket3; - - /* 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]); - - 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); - } - - /* 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); - - /* 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]; - - h0 = vlib_buffer_get_current (b0); - h1 = vlib_buffer_get_current (b1); - h2 = vlib_buffer_get_current (b2); - h3 = vlib_buffer_get_current (b3); - - if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE))) - { - if (b0->flags & VLIB_BUFFER_IS_TRACED) - { - l2fwd_trace_t *t = - vlib_add_trace (vm, node, b0, sizeof (*t)); - t->sw_if_index = sw_if_index0; - t->bd_index = vnet_buffer (b0)->l2.bd_index; - clib_memcpy (t->src, h0->src_address, 6); - clib_memcpy (t->dst, h0->dst_address, 6); - } - if (b1->flags & VLIB_BUFFER_IS_TRACED) - { - l2fwd_trace_t *t = - vlib_add_trace (vm, node, b1, sizeof (*t)); - t->sw_if_index = sw_if_index1; - t->bd_index = vnet_buffer (b1)->l2.bd_index; - clib_memcpy (t->src, h1->src_address, 6); - clib_memcpy (t->dst, h1->dst_address, 6); - } - if (b2->flags & VLIB_BUFFER_IS_TRACED) - { - l2fwd_trace_t *t = - vlib_add_trace (vm, node, b2, sizeof (*t)); - t->sw_if_index = sw_if_index2; - t->bd_index = vnet_buffer (b2)->l2.bd_index; - clib_memcpy (t->src, h2->src_address, 6); - clib_memcpy (t->dst, h2->dst_address, 6); - } - if (b3->flags & VLIB_BUFFER_IS_TRACED) - { - l2fwd_trace_t *t = - vlib_add_trace (vm, node, b3, sizeof (*t)); - t->sw_if_index = sw_if_index3; - t->bd_index = vnet_buffer (b3)->l2.bd_index; - clib_memcpy (t->src, h3->src_address, 6); - clib_memcpy (t->dst, h3->dst_address, 6); - } - } - - /* process 2 pkts */ -#ifdef COUNTERS - em->counters[node_counter_base_index + L2FWD_ERROR_L2FWD] += 4; -#endif - /* *INDENT-OFF* */ - l2fib_lookup_4 (msm->mac_table, &cached_key, &cached_result, - h0->dst_address, h1->dst_address, - h2->dst_address, h3->dst_address, - vnet_buffer (b0)->l2.bd_index, - vnet_buffer (b1)->l2.bd_index, - vnet_buffer (b2)->l2.bd_index, - vnet_buffer (b3)->l2.bd_index, - &key0, /* not used */ - &key1, /* not used */ - &key2, /* not used */ - &key3, /* not used */ - &bucket0, /* not used */ - &bucket1, /* not used */ - &bucket2, /* not used */ - &bucket3, /* not used */ - &result0, - &result1, - &result2, - &result3); - /* *INDENT-ON* */ - l2fwd_process (vm, node, msm, em, b0, sw_if_index0, &result0, - &next0); - l2fwd_process (vm, node, msm, em, b1, sw_if_index1, &result1, - &next1); - l2fwd_process (vm, node, msm, em, b2, sw_if_index2, &result2, - &next2); - l2fwd_process (vm, node, msm, em, b3, sw_if_index3, &result3, - &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; - ethernet_header_t *h0; - l2fib_entry_key_t key0; - l2fib_entry_result_t result0; - u32 bucket0; - - /* 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); - - sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX]; - - h0 = vlib_buffer_get_current (b0); - - if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) - && (b0->flags & VLIB_BUFFER_IS_TRACED))) - { - l2fwd_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t)); - t->sw_if_index = sw_if_index0; - t->bd_index = vnet_buffer (b0)->l2.bd_index; - clib_memcpy (t->src, h0->src_address, 6); - clib_memcpy (t->dst, h0->dst_address, 6); - } - - /* process 1 pkt */ -#ifdef COUNTERS - em->counters[node_counter_base_index + L2FWD_ERROR_L2FWD] += 1; -#endif - l2fib_lookup_1 (msm->mac_table, &cached_key, &cached_result, h0->dst_address, vnet_buffer (b0)->l2.bd_index, &key0, /* not used */ - &bucket0, /* not used */ - &result0); - l2fwd_process (vm, node, msm, em, b0, sw_if_index0, &result0, - &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 (l2fwd_node,static) = { - .function = l2fwd_node_fn, - .name = "l2-fwd", - .vector_size = sizeof (u32), - .format_trace = format_l2fwd_trace, - .type = VLIB_NODE_TYPE_INTERNAL, - - .n_errors = ARRAY_LEN(l2fwd_error_strings), - .error_strings = l2fwd_error_strings, - - .n_next_nodes = L2FWD_N_NEXT, - - /* edit / add dispositions here */ - .next_nodes = { - [L2FWD_NEXT_L2_OUTPUT] = "l2-output", - [L2FWD_NEXT_FLOOD] = "l2-flood", - [L2FWD_NEXT_DROP] = "error-drop", - }, -}; -/* *INDENT-ON* */ - -VLIB_NODE_FUNCTION_MULTIARCH (l2fwd_node, l2fwd_node_fn) - clib_error_t *l2fwd_init (vlib_main_t * vm) -{ - l2fwd_main_t *mp = &l2fwd_main; - - mp->vlib_main = vm; - mp->vnet_main = vnet_get_main (); - - /* init the hash table ptr */ - mp->mac_table = get_mac_table (); - - /* Initialize the next nodes for each ethertype */ - next_by_ethertype_init (&mp->l3_next); - - return 0; -} - -VLIB_INIT_FUNCTION (l2fwd_init); - - -/** Add the L3 input node for this ethertype to the next nodes structure. */ -void -l2fwd_register_input_type (vlib_main_t * vm, - ethernet_type_t type, u32 node_index) -{ - l2fwd_main_t *mp = &l2fwd_main; - u32 next_index; - - next_index = vlib_node_add_next (vm, l2fwd_node.index, node_index); - - next_by_ethertype_register (&mp->l3_next, type, next_index); -} - - -/** - * Set subinterface forward enable/disable. - * The CLI format is: - * set interface l2 forward <interface> [disable] - */ -static clib_error_t * -int_fwd (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 enable; - - 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; - } - - enable = 1; - if (unformat (input, "disable")) - { - enable = 0; - } - - /* set the interface flag */ - if (l2input_intf_config (sw_if_index)->xconnect) - { - l2input_intf_bitmap_enable (sw_if_index, L2INPUT_FEAT_XCONNECT, enable); - } - else - { - l2input_intf_bitmap_enable (sw_if_index, L2INPUT_FEAT_FWD, enable); - } - -done: - return error; -} - -/*? - * Layer 2 unicast forwarding can be enabled and disabled on each - * interface and on each bridge-domain. Use this command to - * manage interfaces. It is enabled by default. - * - * @cliexpar - * Example of how to enable fowarding: - * @cliexcmd{set interface l2 forward GigabitEthernet0/8/0} - * Example of how to disable fowarding: - * @cliexcmd{set interface l2 forward GigabitEthernet0/8/0 disable} -?*/ -/* *INDENT-OFF* */ -VLIB_CLI_COMMAND (int_fwd_cli, static) = { - .path = "set interface l2 forward", - .short_help = "set interface l2 forward <interface> [disable]", - .function = int_fwd, -}; -/* *INDENT-ON* */ - -/* - * fd.io coding-style-patch-verification: ON - * - * Local Variables: - * eval: (c-set-style "gnu") - * End: - */ |