/* * l2_uu_fwd.c : Foward unknown unicast packets to BD's configured interface * * Copyright (c) 2018 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 <vnet/l2/l2_bd.h> #include <vnet/l2/l2_input.h> #define foreach_l2_uu_fwd_error \ _(L2_UU_FWD, "L2 UU fwd") typedef enum { #define _(sym,str) L2_UU_FWD_ERROR_##sym, foreach_l2_uu_fwd_error #undef _ L2_UU_FWD_N_ERROR, } l2_uu_fwd_error_t; static char *l2_uu_fwd_error_strings[] = { #define _(sym,string) string, foreach_l2_uu_fwd_error #undef _ }; typedef enum { L2_UU_FWD_NEXT_DROP, L2_UU_FWD_NEXT_L2_OUTPUT, L2_UU_FWD_N_NEXT, } l2_uu_fwd_next_t; typedef struct { u32 sw_if_index; } l2_uu_fwd_trace_t; /* packet trace format function */ static u8 * format_l2_uu_fwd_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 *); l2_uu_fwd_trace_t *t = va_arg (*args, l2_uu_fwd_trace_t *); s = format (s, "l2-uu-fwd: sw_if_index %d", t->sw_if_index); return s; } VLIB_NODE_FN (l2_uu_fwd_node) (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) { u32 n_left_from, *from, *to_next; l2_uu_fwd_next_t next_index; from = vlib_frame_vector_args (frame); n_left_from = frame->n_vectors; next_index = node->cached_next_index; while (n_left_from > 0) { u32 n_left_to_next; vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); while (n_left_from >= 8 && n_left_to_next >= 4) { const l2_bridge_domain_t *bdc0, *bdc1, *bdc2, *bdc3; l2_uu_fwd_next_t next0, next1, next2, next3; vlib_buffer_t *b0, *b1, *b2, *b3; u32 bi0, bi1, bi2, bi3; { vlib_buffer_t *b4, *b5, *b6, *b7; b4 = vlib_get_buffer (vm, from[4]); b5 = vlib_get_buffer (vm, from[5]); b6 = vlib_get_buffer (vm, from[6]); b7 = vlib_get_buffer (vm, from[7]); vlib_prefetch_buffer_header (b4, STORE); vlib_prefetch_buffer_header (b5, STORE); vlib_prefetch_buffer_header (b6, STORE); vlib_prefetch_buffer_header (b7, STORE); } bi0 = to_next[0] = from[0]; bi1 = to_next[1] = from[1]; bi2 = to_next[2] = from[2]; bi3 = to_next[3] = from[3]; from += 4; to_next += 4; n_left_from -= 4; n_left_to_next -= 4; next3 = next2 = next1 = next0 = L2_UU_FWD_NEXT_L2_OUTPUT; b0 = vlib_get_buffer (vm, bi0); b1 = vlib_get_buffer (vm, bi1); b2 = vlib_get_buffer (vm, bi2); b3 = vlib_get_buffer (vm, bi3); bdc0 = vec_elt_at_index (l2input_main.bd_configs, vnet_buffer (b0)->l2.bd_index); bdc1 = vec_elt_at_index (l2input_main.bd_configs, vnet_buffer (b1)->l2.bd_index); bdc2 = vec_elt_at_index (l2input_main.bd_configs, vnet_buffer (b2)->l2.bd_index); bdc3 = vec_elt_at_index (l2input_main.bd_configs, vnet_buffer (b3)->l2.bd_index); ASSERT (~0 != bdc0->uu_fwd_sw_if_index); vnet_buffer (b0)->sw_if_index[VLIB_TX] = bdc0->uu_fwd_sw_if_index; vnet_buffer (b1)->sw_if_index[VLIB_TX] = bdc1->uu_fwd_sw_if_index; vnet_buffer (b2)->sw_if_index[VLIB_TX] = bdc2->uu_fwd_sw_if_index; vnet_buffer (b3)->sw_if_index[VLIB_TX] = bdc3->uu_fwd_sw_if_index; if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) && (b0->flags & VLIB_BUFFER_IS_TRACED))) { l2_uu_fwd_trace_t *t; t = vlib_add_trace (vm, node, b0, sizeof (*t)); t->sw_if_index = bdc0->uu_fwd_sw_if_index; } if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) && (b1->flags & VLIB_BUFFER_IS_TRACED))) { l2_uu_fwd_trace_t *t; t = vlib_add_trace (vm, node, b1, sizeof (*t)); t->sw_if_index = bdc1->uu_fwd_sw_if_index; } if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) && (b1->flags & VLIB_BUFFER_IS_TRACED))) { l2_uu_fwd_trace_t *t; t = vlib_add_trace (vm, node, b2, sizeof (*t)); t->sw_if_index = bdc2->uu_fwd_sw_if_index; } if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) && (b1->flags & VLIB_BUFFER_IS_TRACED))) { l2_uu_fwd_trace_t *t; t = vlib_add_trace (vm, node, b3, sizeof (*t)); t->sw_if_index = bdc3->uu_fwd_sw_if_index; } 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) { const l2_bridge_domain_t *bdc0; l2_uu_fwd_next_t next0; vlib_buffer_t *b0; u32 bi0; bi0 = from[0]; to_next[0] = bi0; from += 1; to_next += 1; n_left_from -= 1; n_left_to_next -= 1; next0 = L2_UU_FWD_NEXT_L2_OUTPUT; b0 = vlib_get_buffer (vm, bi0); bdc0 = vec_elt_at_index (l2input_main.bd_configs, vnet_buffer (b0)->l2.bd_index); ASSERT (~0 != bdc0->uu_fwd_sw_if_index); vnet_buffer (b0)->sw_if_index[VLIB_TX] = bdc0->uu_fwd_sw_if_index; if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) && (b0->flags & VLIB_BUFFER_IS_TRACED))) { l2_uu_fwd_trace_t *t; t = vlib_add_trace (vm, node, b0, sizeof (*t)); t->sw_if_index = bdc0->uu_fwd_sw_if_index; } 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, node->node_index, L2_UU_FWD_ERROR_L2_UU_FWD, frame->n_vectors); return frame->n_vectors; } /* *INDENT-OFF* */ VLIB_REGISTER_NODE (l2_uu_fwd_node) = { .name = "l2-uu-fwd", .vector_size = sizeof (u32), .format_trace = format_l2_uu_fwd_trace, .type = VLIB_NODE_TYPE_INTERNAL, .n_errors = ARRAY_LEN(l2_uu_fwd_error_strings), .error_strings = l2_uu_fwd_error_strings, .n_next_nodes = L2_UU_FWD_N_NEXT, .next_nodes = { [L2_UU_FWD_NEXT_DROP] = "error-drop", [L2_UU_FWD_NEXT_L2_OUTPUT] = "l2-output", }, }; /* *INDENT-ON* */ /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */