diff options
Diffstat (limited to 'src/vnet/ethernet/p2p_ethernet_input.c')
| -rw-r--r-- | src/vnet/ethernet/p2p_ethernet_input.c | 247 |
1 files changed, 247 insertions, 0 deletions
diff --git a/src/vnet/ethernet/p2p_ethernet_input.c b/src/vnet/ethernet/p2p_ethernet_input.c new file mode 100644 index 00000000000..a58b832af14 --- /dev/null +++ b/src/vnet/ethernet/p2p_ethernet_input.c @@ -0,0 +1,247 @@ +/* + * node.c: p2p ethernet vpp node + * + * Copyright (c) 2016 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 <vppinfra/error.h> + +#include <vnet/ethernet/p2p_ethernet.h> + +#include <vppinfra/error.h> +#include <vppinfra/elog.h> + +vlib_node_registration_t p2p_ethernet_input_node; + +/* packet trace format function */ +u8 * +format_p2p_ethernet_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 *); + p2p_ethernet_trace_t *t = va_arg (*args, p2p_ethernet_trace_t *); + + vnet_main_t *vnm = &vnet_main; + s = format (s, "P2P ethernet: %U -> %U", + format_vnet_sw_if_index_name, vnm, t->sw_if_index, + format_vnet_sw_if_index_name, vnm, t->p2pe_sw_if_index); + + return s; +} + +#define foreach_p2p_ethernet_error \ +_(HITS, "P2P ethernet incoming packets processed") + +typedef enum +{ +#define _(sym,str) P2PE_ERROR_##sym, + foreach_p2p_ethernet_error +#undef _ + P2PE_N_ERROR, +} p2p_ethernet_error_t; + +static char *p2p_ethernet_error_strings[] = { +#define _(sym,string) string, + foreach_p2p_ethernet_error +#undef _ +}; + +static uword +p2p_ethernet_input_node_fn (vlib_main_t * vm, + vlib_node_runtime_t * node, vlib_frame_t * frame) +{ + u32 n_trace = vlib_get_trace_count (vm, node); + u32 n_left_from, *from, *to_next; + u32 next_index; + u32 n_p2p_ethernet_packets = 0; + + 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 >= 4 && n_left_to_next >= 2) + { + u32 bi0, bi1; + vlib_buffer_t *b0, *b1; + u32 next0 = 0, next1 = 0; + u32 sw_if_index0, sw_if_index1; + ethernet_header_t *en0, *en1; + u32 rx0, rx1; + + bi0 = from[0]; + bi1 = from[1]; + to_next[0] = bi0; + to_next[1] = bi1; + from += 2; + to_next += 2; + n_left_to_next -= 2; + n_left_from -= 2; + + b0 = vlib_get_buffer (vm, bi0); + b1 = vlib_get_buffer (vm, bi1); + + en0 = vlib_buffer_get_current (b0); + sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX]; + en1 = vlib_buffer_get_current (b1); + sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_RX]; + + vnet_feature_next (sw_if_index0, &next0, b0); + vnet_feature_next (sw_if_index1, &next1, b1); + + rx0 = p2p_ethernet_lookup (sw_if_index0, en0->src_address); + rx1 = p2p_ethernet_lookup (sw_if_index1, en1->src_address); + + if (rx0 != ~0) + { + /* Send pkt to p2p_ethernet RX interface */ + vnet_buffer (b0)->sw_if_index[VLIB_RX] = rx0; + n_p2p_ethernet_packets += 1; + + if (PREDICT_FALSE (n_trace > 0)) + { + p2p_ethernet_trace_t *t0; + vlib_trace_buffer (vm, node, next_index, b0, + 1 /* follow_chain */ ); + vlib_set_trace_count (vm, node, --n_trace); + t0 = vlib_add_trace (vm, node, b0, sizeof (*t0)); + t0->sw_if_index = sw_if_index0; + t0->p2pe_sw_if_index = rx0; + } + } + if (rx1 != ~0) + { + /* Send pkt to p2p_ethernet RX interface */ + vnet_buffer (b1)->sw_if_index[VLIB_RX] = rx1; + n_p2p_ethernet_packets += 1; + + if (PREDICT_FALSE (n_trace > 0)) + { + p2p_ethernet_trace_t *t1; + vlib_trace_buffer (vm, node, next_index, b1, + 1 /* follow_chain */ ); + vlib_set_trace_count (vm, node, --n_trace); + t1 = vlib_add_trace (vm, node, b1, sizeof (*t1)); + t1->sw_if_index = sw_if_index1; + t1->p2pe_sw_if_index = rx1; + } + } + + /* 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_validate_buffer_enqueue_x1 (vm, node, next_index, + to_next, n_left_to_next, + bi1, next1); + } + + while (n_left_from > 0 && n_left_to_next > 0) + { + u32 bi0; + vlib_buffer_t *b0; + u32 next0 = 0; + u32 sw_if_index0; + ethernet_header_t *en0; + u32 rx0; + + 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); + + en0 = vlib_buffer_get_current (b0); + sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX]; + + vnet_feature_next (sw_if_index0, &next0, b0); + + rx0 = p2p_ethernet_lookup (sw_if_index0, en0->src_address); + if (rx0 != ~0) + { + /* Send pkt to p2p_ethernet RX interface */ + vnet_buffer (b0)->sw_if_index[VLIB_RX] = rx0; + n_p2p_ethernet_packets += 1; + + if (PREDICT_FALSE (n_trace > 0)) + { + p2p_ethernet_trace_t *t0; + vlib_trace_buffer (vm, node, next_index, b0, + 1 /* follow_chain */ ); + vlib_set_trace_count (vm, node, --n_trace); + t0 = vlib_add_trace (vm, node, b0, sizeof (*t0)); + t0->sw_if_index = sw_if_index0; + t0->p2pe_sw_if_index = rx0; + } + } + else + { + if (PREDICT_FALSE (n_trace > 0)) + { + node->flags |= VLIB_NODE_FLAG_TRACE; + } + } + + /* 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); + } + + vlib_node_increment_counter (vm, p2p_ethernet_input_node.index, + P2PE_ERROR_HITS, n_p2p_ethernet_packets); + return frame->n_vectors; +} + +/* *INDENT-OFF* */ +VLIB_REGISTER_NODE (p2p_ethernet_input_node) = { + .function = p2p_ethernet_input_node_fn, + .name = "p2p-ethernet-input", + .vector_size = sizeof (u32), + .format_trace = format_p2p_ethernet_trace, + .type = VLIB_NODE_TYPE_INTERNAL, + + .n_errors = ARRAY_LEN(p2p_ethernet_error_strings), + .error_strings = p2p_ethernet_error_strings, + + .n_next_nodes = 1, + + /* edit / add dispositions here */ + .next_nodes = { + [0] = "error-drop", + }, +}; +/* *INDENT-ON* */ + +VLIB_NODE_FUNCTION_MULTIARCH (p2p_ethernet_input_node, + p2p_ethernet_input_node_fn) +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ |