diff options
Diffstat (limited to 'src/vnet/l2/l2_uu_fwd.c')
| -rw-r--r-- | src/vnet/l2/l2_uu_fwd.c | 242 |
1 files changed, 242 insertions, 0 deletions
diff --git a/src/vnet/l2/l2_uu_fwd.c b/src/vnet/l2/l2_uu_fwd.c new file mode 100644 index 00000000000..fd79387bbe0 --- /dev/null +++ b/src/vnet/l2/l2_uu_fwd.c @@ -0,0 +1,242 @@ +/* + * 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; +} + +static uword +l2_uu_fwd_node_fn (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,static) = { + .function = l2_uu_fwd_node_fn, + .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", + }, +}; + +VLIB_NODE_FUNCTION_MULTIARCH (l2_uu_fwd_node, l2_uu_fwd_node_fn) +/* *INDENT-ON* */ + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ |