/* * Copyright (c) 2015 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. */ /* * interface_output.c: interface output node * * Copyright (c) 2008 Eliot Dresselhaus * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ #include <vnet/vnet.h> #include <vnet/ip/icmp46_packet.h> #include <vnet/ethernet/packet.h> #include <vnet/ip/ip4.h> #include <vnet/ip/ip6.h> #include <vnet/udp/udp_packet.h> #include <vnet/feature/feature.h> #include <vnet/classify/trace_classify.h> #include <vnet/interface_output.h> typedef struct { u32 sw_if_index; u32 flags; u8 data[128 - 2 * sizeof (u32)]; } interface_output_trace_t; #ifndef CLIB_MARCH_VARIANT u8 * format_vnet_interface_output_trace (u8 * s, va_list * va) { CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *); vlib_node_t *node = va_arg (*va, vlib_node_t *); interface_output_trace_t *t = va_arg (*va, interface_output_trace_t *); vnet_main_t *vnm = vnet_get_main (); vnet_sw_interface_t *si; u32 indent; if (t->sw_if_index != (u32) ~ 0) { indent = format_get_indent (s); if (pool_is_free_index (vnm->interface_main.sw_interfaces, t->sw_if_index)) { /* the interface may have been deleted by the time the trace is printed */ s = format (s, "sw_if_index: %d ", t->sw_if_index); } else { si = vnet_get_sw_interface (vnm, t->sw_if_index); s = format (s, "%U ", format_vnet_sw_interface_name, vnm, si, t->flags); } s = format (s, "\n%U%U", format_white_space, indent, node->format_buffer ? node->format_buffer : format_hex_bytes, t->data, sizeof (t->data)); } return s; } static void vnet_interface_output_trace (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame, uword n_buffers) { u32 n_left, *from; n_left = n_buffers; from = vlib_frame_vector_args (frame); while (n_left >= 4) { u32 bi0, bi1; vlib_buffer_t *b0, *b1; interface_output_trace_t *t0, *t1; /* Prefetch next iteration. */ vlib_prefetch_buffer_with_index (vm, from[2], LOAD); vlib_prefetch_buffer_with_index (vm, from[3], LOAD); bi0 = from[0]; bi1 = from[1]; b0 = vlib_get_buffer (vm, bi0); b1 = vlib_get_buffer (vm, bi1); if (b0->flags & VLIB_BUFFER_IS_TRACED) { t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0])); t0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_TX]; t0->flags = b0->flags; clib_memcpy_fast (t0->data, vlib_buffer_get_current (b0), sizeof (t0->data)); } if (b1->flags & VLIB_BUFFER_IS_TRACED) { t1 = vlib_add_trace (vm, node, b1, sizeof (t1[0])); t1->sw_if_index = vnet_buffer (b1)->sw_if_index[VLIB_TX]; t1->flags = b1->flags; clib_memcpy_fast (t1->data, vlib_buffer_get_current (b1), sizeof (t1->data)); } from += 2; n_left -= 2; } while (n_left >= 1) { u32 bi0; vlib_buffer_t *b0; interface_output_trace_t *t0; bi0 = from[0]; b0 = vlib_get_buffer (vm, bi0); if (b0->flags & VLIB_BUFFER_IS_TRACED) { t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0])); t0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_TX]; t0->flags = b0->flags; clib_memcpy_fast (t0->data, vlib_buffer_get_current (b0), sizeof (t0->data)); } from += 1; n_left -= 1; } } static_always_inline uword vnet_interface_output_node_inline (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame, vnet_main_t * vnm, vnet_hw_interface_t * hi, int do_tx_offloads) { vnet_interface_output_runtime_t *rt = (void *) node->runtime_data; vnet_sw_interface_t *si; u32 n_left_to_tx, *from, *from_end, *to_tx; u32 n_bytes, n_buffers, n_packets; u32 n_bytes_b0, n_bytes_b1, n_bytes_b2, n_bytes_b3; u32 thread_index = vm->thread_index; vnet_interface_main_t *im = &vnm->interface_main; u32 next_index = VNET_INTERFACE_OUTPUT_NEXT_TX; u32 current_config_index = ~0; u8 arc = im->output_feature_arc_index; vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs; n_buffers = frame->n_vectors; if (node->flags & VLIB_NODE_FLAG_TRACE) vnet_interface_output_trace (vm, node, frame, n_buffers); from = vlib_frame_vector_args (frame); vlib_get_buffers (vm, from, b, n_buffers); if (rt->is_deleted) return vlib_error_drop_buffers (vm, node, from, /* buffer stride */ 1, n_buffers, VNET_INTERFACE_OUTPUT_NEXT_DROP, node->node_index, VNET_INTERFACE_OUTPUT_ERROR_INTERFACE_DELETED); si = vnet_get_sw_interface (vnm, rt->sw_if_index); hi = vnet_get_sup_hw_interface (vnm, rt->sw_if_index); if (!(si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) || !(hi->flags & VNET_HW_INTERFACE_FLAG_LINK_UP)) { vlib_simple_counter_main_t *cm; cm = vec_elt_at_index (vnm->interface_main.sw_if_counters, VNET_INTERFACE_COUNTER_TX_ERROR); vlib_increment_simple_counter (cm, thread_index, rt->sw_if_index, n_buffers); return vlib_error_drop_buffers (vm, node, from, /* buffer stride */ 1, n_buffers, VNET_INTERFACE_OUTPUT_NEXT_DROP, node->node_index, VNET_INTERFACE_OUTPUT_ERROR_INTERFACE_DOWN); } from_end = from + n_buffers; /* Total byte count of all buffers. */ n_bytes = 0; n_packets = 0; /* interface-output feature arc handling */ if (PREDICT_FALSE (vnet_have_features (arc, rt->sw_if_index))) { vnet_feature_config_main_t *fcm; fcm = vnet_feature_get_config_main (arc); current_config_index = vnet_get_feature_config_index (arc, rt->sw_if_index); vnet_get_config_data (&fcm->config_main, ¤t_config_index, &next_index, 0); } while (from < from_end) { /* Get new next frame since previous incomplete frame may have less than VNET_FRAME_SIZE vectors in it. */ vlib_get_new_next_frame (vm, node, next_index, to_tx, n_left_to_tx); while (from + 8 <= from_end && n_left_to_tx >= 4) { u32 bi0, bi1, bi2, bi3; u32 tx_swif0, tx_swif1, tx_swif2, tx_swif3; u32 or_flags; /* Prefetch next iteration. */ vlib_prefetch_buffer_header (b[4], LOAD); vlib_prefetch_buffer_header (b[5], LOAD); vlib_prefetch_buffer_header (b[6], LOAD); vlib_prefetch_buffer_header (b[7], LOAD); bi0 = from[0]; bi1 = from[1]; bi2 = from[2]; bi3 = from[3]; to_tx[0] = bi0; to_tx[1] = bi1; to_tx[2] = bi2; to_tx[3] = bi3; or_flags = b[0]->flags | b[1]->flags | b[2]->flags | b[3]->flags; from += 4; to_tx += 4; n_left_to_tx -= 4; /* Be grumpy about zero length buffers for benefit of driver tx function. */ ASSERT (b[0]->current_length > 0); ASSERT (b[1]->current_length > 0); ASSERT (b[2]->current_length > 0); ASSERT (b[3]->current_length > 0); n_bytes_b0 = vlib_buffer_length_in_chain (vm, b[0]); n_bytes_b1 = vlib_buffer_length_in_chain (vm, b[1]); n_bytes_b2 = vlib_buffer_length_in_chain (vm, b[2]); n_bytes_b3 = vlib_buffer_length_in_chain (vm, b[3]); tx_swif0 = vnet_buffer (b[0])->sw_if_index[VLIB_TX]; tx_swif1 = vnet_buffer (b[1])->sw_if_index[VLIB_TX]; tx_swif2 = vnet_buffer (b[2])->sw_if_index[VLIB_TX]; tx_swif3 = vnet_buffer (b[3])->sw_if_index[VLIB_TX]; n_bytes += n_bytes_b0 + n_bytes_b1; n_bytes += n_bytes_b2 + n_bytes_b3; n_packets += 4; if (PREDICT_FALSE (current_config_index != ~0)) { vnet_buffer (b[0])->feature_arc_index = arc; vnet_buffer (b[1])->feature_arc_index = arc; vnet_buffer (b[2])->feature_arc_index = arc; vnet_buffer (b[3])->feature_arc_index = arc; b[0]->current_config_index = current_config_index; b[1]->current_config_index = current_config_index; b[2]->current_config_index = current_config_index; b[3]->current_config_index = current_config_index; } /* update vlan subif tx counts, if required */ if (PREDICT_FALSE (tx_swif0 != rt->sw_if_index)) { vlib_increment_combined_counter (im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_TX, thread_index, tx_swif0, 1, n_bytes_b0); } if (PREDICT_FALSE (tx_swif1 != rt->sw_if_index)) { vlib_increment_combined_counter (im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_TX, thread_index, tx_swif1, 1, n_bytes_b1); } if (PREDICT_FALSE (tx_swif2 != rt->sw_if_index)) { vlib_increment_combined_counter (im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_TX, thread_index, tx_swif2, 1, n_bytes_b2); } if (PREDICT_FALSE (tx_swif3 != rt->sw_if_index)) { vlib_increment_combined_counter (im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_TX, thread_index, tx_swif3, 1, n_bytes_b3); } if (do_tx_offloads) { u32 vnet_buffer_offload_flags = (VNET_BUFFER_F_OFFLOAD_TCP_CKSUM | VNET_BUFFER_F_OFFLOAD_UDP_CKSUM | VNET_BUFFER_F_OFFLOAD_IP_CKSUM); if (or_flags & vnet_buffer_offload_flags) { if (b[0]->flags & vnet_buffer_offload_flags) vnet_calc_checksums_inline (vm, b[0], b[0]->flags & VNET_BUFFER_F_IS_IP4, b[0]->flags & VNET_BUFFER_F_IS_IP6); if (b[1]->flags & vnet_buffer_offload_flags) vnet_calc_checksums_inline (vm, b[1], b[1]->flags & VNET_BUFFER_F_IS_IP4, b[1]->flags & VNET_BUFFER_F_IS_IP6); if (b[2]->flags & vnet_buffer_offload_flags) vnet_calc_checksums_inline (vm, b[2], b[2]->flags & VNET_BUFFER_F_IS_IP4, b[2]->flags & VNET_BUFFER_F_IS_IP6); if (b[3]->flags & vnet_buffer_offload_flags) vnet_calc_checksums_inline (vm, b[3], b[3]->flags & VNET_BUFFER_F_IS_IP4, b[3]->flags & VNET_BUFFER_F_IS_IP6); } } b += 4; } while (from + 1 <= from_end && n_left_to_tx >= 1) { u32 bi0; u32 tx_swif0; bi0 = from[0]; to_tx[0] = bi0; from += 1; to_tx += 1; n_left_to_tx -= 1; /* Be grumpy about zero length buffers for benefit of driver tx function. */ ASSERT (b[0]->current_length > 0); n_bytes_b0 = vlib_buffer_length_in_chain (vm, b[0]); tx_swif0 = vnet_buffer (b[0])->sw_if_index[VLIB_TX]; n_bytes += n_bytes_b0; n_packets += 1; if (PREDICT_FALSE (current_config_index != ~0)) { vnet_buffer (b[0])->feature_arc_index = arc; b[0]->current_config_index = current_config_index; } if (PREDICT_FALSE (tx_swif0 != rt->sw_if_index)) { vlib_increment_combined_counter (im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_TX, thread_index, tx_swif0, 1, n_bytes_b0); } if (do_tx_offloads) { if (b[0]->flags & (VNET_BUFFER_F_OFFLOAD_TCP_CKSUM | VNET_BUFFER_F_OFFLOAD_UDP_CKSUM | VNET_BUFFER_F_OFFLOAD_IP_CKSUM)) vnet_calc_checksums_inline (vm, b[0], b[0]->flags & VNET_BUFFER_F_IS_IP4, b[0]->flags & VNET_BUFFER_F_IS_IP6); } b += 1; } vlib_put_next_frame (vm, node, next_index, n_left_to_tx); } /* Update main interface stats. */ vlib_increment_combined_counter (im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_TX, thread_index, rt->sw_if_index, n_packets, n_bytes); return n_buffers; } #endif /* CLIB_MARCH_VARIANT */ static_always_inline void vnet_interface_pcap_tx_trace (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame, int sw_if_index_from_buffer) { u32 n_left_from, *from; u32 sw_if_index; vnet_pcap_t *pp = &vlib_global_main.pcap; if (PREDICT_TRUE (pp->pcap_tx_enable == 0)) return; if (sw_if_index_from_buffer == 0) { vnet_interface_output_runtime_t *rt = (void *) node->runtime_data; sw_if_index = rt->sw_if_index; } else sw_if_index = ~0; n_left_from = frame->n_vectors; from = vlib_frame_vector_args (frame); while (n_left_from > 0) { int classify_filter_result; u32 bi0 = from[0]; vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0); from++; n_left_from--; if (pp->filter_classify_table_index != ~0) { classify_filter_result = vnet_is_packet_traced_inline (b0, pp->filter_classify_table_index, 0 /* full classify */ ); if (classify_filter_result) pcap_add_buffer (&pp->pcap_main, vm, bi0, pp->max_bytes_per_pkt); continue; } if (sw_if_index_from_buffer) sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_TX]; if (pp->pcap_sw_if_index == 0 || pp->pcap_sw_if_index == sw_if_index) { vnet_main_t *vnm = vnet_get_main (); vnet_hw_interface_t *hi = vnet_get_sup_hw_interface (vnm, sw_if_index); /* Capture pkt if not filtered, or if filter hits */ if (hi->trace_classify_table_index == ~0 || vnet_is_packet_traced_inline (b0, hi->trace_classify_table_index, 0 /* full classify */ )) pcap_add_buffer (&pp->pcap_main, vm, bi0, pp->max_bytes_per_pkt); } } } #ifndef CLIB_MARCH_VARIANT uword vnet_interface_output_node (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) { vnet_main_t *vnm = vnet_get_main (); vnet_hw_interface_t *hi; vnet_interface_output_runtime_t *rt = (void *) node->runtime_data; hi = vnet_get_sup_hw_interface (vnm, rt->sw_if_index); vnet_interface_pcap_tx_trace (vm, node, frame, 0 /* sw_if_index_from_buffer */ ); if (hi->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_TX_L4_CKSUM_OFFLOAD) return vnet_interface_output_node_inline (vm, node, frame, vnm, hi, /* do_tx_offloads */ 0); else return vnet_interface_output_node_inline (vm, node, frame, vnm, hi, /* do_tx_offloads */ 1); } #endif /* CLIB_MARCH_VARIANT */ /* Use buffer's sw_if_index[VNET_TX] to choose output interface. */ VLIB_NODE_FN (vnet_per_buffer_interface_output_node) (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) { vnet_main_t *vnm = vnet_get_main (); u32 n_left_to_next, *from, *to_next; u32 n_left_from, next_index; vnet_interface_pcap_tx_trace (vm, node, frame, 1 /* sw_if_index_from_buffer */ ); n_left_from = frame->n_vectors; from = vlib_frame_vector_args (frame); next_index = node->cached_next_index; while (n_left_from > 0) { 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, next0, next1; vlib_buffer_t *b0, *b1; vnet_hw_interface_t *hi0, *hi1; /* Prefetch next iteration. */ vlib_prefetch_buffer_with_index (vm, from[2], LOAD); vlib_prefetch_buffer_with_index (vm, from[3], LOAD); 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); hi0 = vnet_get_sup_hw_interface (vnm, vnet_buffer (b0)->sw_if_index [VLIB_TX]); hi1 = vnet_get_sup_hw_interface (vnm, vnet_buffer (b1)->sw_if_index [VLIB_TX]); next0 = hi0->output_node_next_index; next1 = hi1->output_node_next_index; vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next, n_left_to_next, bi0, bi1, next0, next1); } while (n_left_from > 0 && n_left_to_next > 0) { u32 bi0, next0; vlib_buffer_t *b0; vnet_hw_interface_t *hi0; bi0 = from[0]; to_next[0] = bi0; from += 1; to_next += 1; n_left_to_next -= 1; n_left_from -= 1; b0 = vlib_get_buffer (vm, bi0); hi0 = vnet_get_sup_hw_interface (vnm, vnet_buffer (b0)->sw_if_index [VLIB_TX]); next0 = hi0->output_node_next_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); } return frame->n_vectors; } typedef struct vnet_error_trace_t_ { u32 sw_if_index; i8 details_valid; u8 is_ip6; u8 pad[2]; u16 mactype; ip46_address_t src, dst; } vnet_error_trace_t; static u8 * format_vnet_error_trace (u8 * s, va_list * va) { CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *); CLIB_UNUSED (vlib_node_t * node) = va_arg (*va, vlib_node_t *); vnet_error_trace_t *t = va_arg (*va, vnet_error_trace_t *); /* Normal, non-catchup trace */ if (t->details_valid == 0) { s = format (s, "rx:%U", format_vnet_sw_if_index_name, vnet_get_main (), t->sw_if_index); } else if (t->details_valid == 1) { /* The trace capture code didn't understant the mactype */ s = format (s, "mactype 0x%4x (not decoded)", t->mactype); } else if (t->details_valid == 2) { /* Dump the src/dst addresses */ if (t->is_ip6 == 0) s = format (s, "IP4: %U -> %U", format_ip4_address, &t->src.ip4, format_ip4_address, &t->dst.ip4); else s = format (s, "IP6: %U -> %U", format_ip6_address, &t->src.ip6, format_ip6_address, &t->dst.ip6); } return s; } static void interface_trace_buffers (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) { u32 n_left, *buffers; buffers = vlib_frame_vector_args (frame); n_left = frame->n_vectors; while (n_left >= 4) { u32 bi0, bi1; vlib_buffer_t *b0, *b1; vnet_error_trace_t *t0, *t1; /* Prefetch next iteration. */ vlib_prefetch_buffer_with_index (vm, buffers[2], LOAD); vlib_prefetch_buffer_with_index (vm, buffers[3], LOAD); bi0 = buffers[0]; bi1 = buffers[1]; b0 = vlib_get_buffer (vm, bi0); b1 = vlib_get_buffer (vm, bi1); if (b0->flags & VLIB_BUFFER_IS_TRACED) { t0 = vlib_add_trace (vm, node, b0, STRUCT_OFFSET_OF (vnet_error_trace_t, pad)); t0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX]; t0->details_valid = 0; } if (b1->flags & VLIB_BUFFER_IS_TRACED) { t1 = vlib_add_trace (vm, node, b1, STRUCT_OFFSET_OF (vnet_error_trace_t, pad)); t1->sw_if_index = vnet_buffer (b1)->sw_if_index[VLIB_RX]; t1->details_valid = 0; } buffers += 2; n_left -= 2; } while (n_left >= 1) { u32 bi0; vlib_buffer_t *b0; vnet_error_trace_t *t0; bi0 = buffers[0]; b0 = vlib_get_buffer (vm, bi0); if (b0->flags & VLIB_BUFFER_IS_TRACED) { t0 = vlib_add_trace (vm, node, b0, STRUCT_OFFSET_OF (vnet_error_trace_t, pad)); t0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX]; t0->details_valid = 0; } buffers += 1; n_left -= 1; } } typedef enum { VNET_ERROR_DISPOSITION_DROP, VNET_ERROR_DISPOSITION_PUNT, VNET_ERROR_N_DISPOSITION, } vnet_error_disposition_t; static void drop_catchup_trace (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_buffer_t * b) { /* Can we safely rewind the buffer? If not, fagedaboudit */ if (b->flags & VNET_BUFFER_F_L2_HDR_OFFSET_VALID) { vnet_error_trace_t *t; ip4_header_t *ip4; ip6_header_t *ip6; ethernet_header_t *eh; i16 delta; t = vlib_add_trace (vm, node, b, sizeof (*t)); delta = vnet_buffer (b)->l2_hdr_offset - b->current_data; vlib_buffer_advance (b, delta); eh = vlib_buffer_get_current (b); /* Save mactype */ t->mactype = clib_net_to_host_u16 (eh->type); t->details_valid = 1; switch (t->mactype) { case ETHERNET_TYPE_IP4: ip4 = (void *) (eh + 1); t->details_valid = 2; t->is_ip6 = 0; t->src.ip4.as_u32 = ip4->src_address.as_u32; t->dst.ip4.as_u32 = ip4->dst_address.as_u32; break; case ETHERNET_TYPE_IP6: ip6 = (void *) (eh + 1); t->details_valid = 2; t->is_ip6 = 1; clib_memcpy_fast (t->src.as_u8, ip6->src_address.as_u8, sizeof (ip6_address_t)); clib_memcpy_fast (t->dst.as_u8, ip6->dst_address.as_u8, sizeof (ip6_address_t)); break; default: /* Dunno, do nothing, leave details_valid alone */ break; } /* Restore current data (probably unnecessary) */ vlib_buffer_advance (b, -delta); } } static_always_inline uword interface_drop_punt (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame, vnet_error_disposition_t disposition) { u32 *from, n_left, thread_index, *sw_if_index; vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b; u32 sw_if_indices[VLIB_FRAME_SIZE]; vlib_simple_counter_main_t *cm; u16 nexts[VLIB_FRAME_SIZE]; u32 n_trace; vnet_main_t *vnm; vnm = vnet_get_main (); thread_index = vm->thread_index; from = vlib_frame_vector_args (frame); n_left = frame->n_vectors; b = bufs; sw_if_index = sw_if_indices; vlib_get_buffers (vm, from, bufs, n_left); /* "trace add error-drop NNN?" */ if (PREDICT_FALSE ((n_trace = vlib_get_trace_count (vm, node)))) { /* If pkts aren't otherwise traced... */ if ((node->flags & VLIB_NODE_FLAG_TRACE) == 0) { /* Trace them from here */ node->flags |= VLIB_NODE_FLAG_TRACE; while (n_trace && n_left) { vlib_trace_buffer (vm, node, 0 /* next_index */ , b[0], 0 /* follow chain */ ); /* * Here we have a wireshark dissector problem. * Packets may be well-formed, or not. We * must not blow chunks in any case. * * Try to produce trace records which will help * folks understand what's going on. */ drop_catchup_trace (vm, node, b[0]); n_trace--; n_left--; b++; } } vlib_set_trace_count (vm, node, n_trace); b = bufs; n_left = frame->n_vectors; } if (node->flags & VLIB_NODE_FLAG_TRACE) interface_trace_buffers (vm, node, frame); /* All going to drop regardless, this is just a counting exercise */ clib_memset (nexts, 0, sizeof (nexts)); cm = vec_elt_at_index (vnm->interface_main.sw_if_counters, (disposition == VNET_ERROR_DISPOSITION_PUNT ? VNET_INTERFACE_COUNTER_PUNT : VNET_INTERFACE_COUNTER_DROP)); /* collect the array of interfaces first ... */ while (n_left >= 4) { if (n_left >= 12) { /* Prefetch 8 ahead - there's not much going on in each iteration */ vlib_prefetch_buffer_header (b[4], LOAD); vlib_prefetch_buffer_header (b[5], LOAD); vlib_prefetch_buffer_header (b[6], LOAD); vlib_prefetch_buffer_header (b[7], LOAD); } sw_if_index[0] = vnet_buffer (b[0])->sw_if_index[VLIB_RX]; sw_if_index[1] = vnet_buffer (b[1])->sw_if_index[VLIB_RX]; sw_if_index[2] = vnet_buffer (b[2])->sw_if_index[VLIB_RX]; sw_if_index[3] = vnet_buffer (b[3])->sw_if_index[VLIB_RX]; sw_if_index += 4; n_left -= 4; b += 4; } while (n_left) { sw_if_index[0] = vnet_buffer (b[0])->sw_if_index[VLIB_RX]; sw_if_index += 1; n_left -= 1; b += 1; } /* ... then count against them in blocks */ n_left = frame->n_vectors; while (n_left) { vnet_sw_interface_t *sw_if0; u16 off, count; off = frame->n_vectors - n_left; sw_if_index = sw_if_indices + off; count = clib_count_equal_u32 (sw_if_index, n_left); n_left -= count; vlib_increment_simple_counter (cm, thread_index, sw_if_index[0], count); /* Increment super-interface drop/punt counters for sub-interfaces. */ sw_if0 = vnet_get_sw_interface (vnm, sw_if_index[0]); if (sw_if0->sup_sw_if_index != sw_if_index[0]) vlib_increment_simple_counter (cm, thread_index, sw_if0->sup_sw_if_index, count); } vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors); return frame->n_vectors; } static inline void pcap_drop_trace (vlib_main_t * vm, vnet_interface_main_t * im, vnet_pcap_t * pp, vlib_frame_t * f) { u32 *from; u32 n_left = f->n_vectors; vlib_buffer_t *b0, *p1; u32 bi0; i16 save_current_data; u16 save_current_length; vlib_error_main_t *em = &vm->error_main; int do_trace = 0; from = vlib_frame_vector_args (f); while (n_left > 0) { if (PREDICT_TRUE (n_left > 1)) { p1 = vlib_get_buffer (vm, from[1]); vlib_prefetch_buffer_header (p1, LOAD); } bi0 = from[0]; b0 = vlib_get_buffer (vm, bi0); from++; n_left--; /* See if we're pointedly ignoring this specific error */ if (im->pcap_drop_filter_hash && hash_get (im->pcap_drop_filter_hash, b0->error)) continue; do_trace = (pp->pcap_sw_if_index == 0) || pp->pcap_sw_if_index == vnet_buffer (b0)->sw_if_index[VLIB_RX]; if (PREDICT_FALSE (do_trace == 0 && pp->filter_classify_table_index != ~0)) { do_trace = vnet_is_packet_traced_inline (b0, pp->filter_classify_table_index, 0 /* full classify */ ); } /* Trace all drops, or drops received on a specific interface */ if (do_trace) { save_current_data = b0->current_data; save_current_length = b0->current_length; /* * Typically, we'll need to rewind the buffer * if l2_hdr_offset is valid, make sure to rewind to the start of * the L2 header. This may not be the buffer start in case we pop-ed * vlan tags. * Otherwise, rewind to buffer start and hope for the best. */ if (b0->flags & VNET_BUFFER_F_L2_HDR_OFFSET_VALID) { if (b0->current_data > vnet_buffer (b0)->l2_hdr_offset) vlib_buffer_advance (b0, vnet_buffer (b0)->l2_hdr_offset - b0->current_data); } else if (b0->current_data > 0) vlib_buffer_advance (b0, (word) - b0->current_data); { vlib_buffer_t *last = b0; u32 error_node_index; int drop_string_len; vlib_node_t *n; /* Length of the error string */ int error_string_len = clib_strnlen (em->error_strings_heap[b0->error], 128); /* Dig up the drop node */ error_node_index = vm->node_main.node_by_error[b0->error]; n = vlib_get_node (vm, error_node_index); /* Length of full drop string, w/ "nodename: " prepended */ drop_string_len = error_string_len + vec_len (n->name) + 2; /* Find the last buffer in the chain */ while (last->flags & VLIB_BUFFER_NEXT_PRESENT) last = vlib_get_buffer (vm, last->next_buffer); /* * Append <nodename>: <error-string> to the capture, * only if we can do that without allocating a new buffer. */ if (PREDICT_TRUE ((last->current_data + last->current_length) < (VLIB_BUFFER_DEFAULT_DATA_SIZE - drop_string_len))) { clib_memcpy_fast (last->data + last->current_data + last->current_length, n->name, vec_len (n->name)); clib_memcpy_fast (last->data + last->current_data + last->current_length + vec_len (n->name), ": ", 2); clib_memcpy_fast (last->data + last->current_data + last->current_length + vec_len (n->name) + 2, em->error_strings_heap[b0->error], error_string_len); last->current_length += drop_string_len; b0->flags &= ~(VLIB_BUFFER_TOTAL_LENGTH_VALID); pcap_add_buffer (&pp->pcap_main, vm, bi0, pp->max_bytes_per_pkt); last->current_length -= drop_string_len; b0->current_data = save_current_data; b0->current_length = save_current_length; continue; } } /* * Didn't have space in the last buffer, here's the dropped * packet as-is */ pcap_add_buffer (&pp->pcap_main, vm, bi0, pp->max_bytes_per_pkt); b0->current_data = save_current_data; b0->current_length = save_current_length; } } } #ifndef CLIB_MARCH_VARIANT void vnet_pcap_drop_trace_filter_add_del (u32 error_index, int is_add) { vnet_interface_main_t *im = &vnet_get_main ()->interface_main; if (im->pcap_drop_filter_hash == 0) im->pcap_drop_filter_hash = hash_create (0, sizeof (uword)); if (is_add) hash_set (im->pcap_drop_filter_hash, error_index, 1); else hash_unset (im->pcap_drop_filter_hash, error_index); } #endif /* CLIB_MARCH_VARIANT */ VLIB_NODE_FN (interface_drop) (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) { vnet_interface_main_t *im = &vnet_get_main ()->interface_main; vnet_pcap_t *pp = &vlib_global_main.pcap; if (PREDICT_FALSE (pp->pcap_drop_enable)) pcap_drop_trace (vm, im, pp, frame); return interface_drop_punt (vm, node, frame, VNET_ERROR_DISPOSITION_DROP); } VLIB_NODE_FN (interface_punt) (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) { return interface_drop_punt (vm, node, frame, VNET_ERROR_DISPOSITION_PUNT); } /* *INDENT-OFF* */ VLIB_REGISTER_NODE (interface_drop) = { .name = "error-drop", .vector_size = sizeof (u32), .format_trace = format_vnet_error_trace, .flags = VLIB_NODE_FLAG_TRACE_SUPPORTED, .n_next_nodes = 1, .next_nodes = { [0] = "drop", }, }; /* *INDENT-ON* */ /* *INDENT-OFF* */ VLIB_REGISTER_NODE (interface_punt) = { .name = "error-punt", .vector_size = sizeof (u32), .format_trace = format_vnet_error_trace, .flags = VLIB_NODE_FLAG_TRACE_SUPPORTED, .n_next_nodes = 1, .next_nodes = { [0] = "punt", }, }; /* *INDENT-ON* */ /* *INDENT-OFF* */ VLIB_REGISTER_NODE (vnet_per_buffer_interface_output_node) = { .name = "interface-output", .vector_size = sizeof (u32), }; /* *INDENT-ON* */ static uword interface_tx_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * from_frame) { vnet_main_t *vnm = vnet_get_main (); u32 last_sw_if_index = ~0; vlib_frame_t *to_frame = 0; vnet_hw_interface_t *hw = 0; u32 *from, *to_next = 0; u32 n_left_from; from = vlib_frame_vector_args (from_frame); n_left_from = from_frame->n_vectors; while (n_left_from > 0) { u32 bi0; vlib_buffer_t *b0; u32 sw_if_index0; bi0 = from[0]; from++; n_left_from--; b0 = vlib_get_buffer (vm, bi0); sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_TX]; if (PREDICT_FALSE ((last_sw_if_index != sw_if_index0) || to_frame == 0)) { if (to_frame) { hw = vnet_get_sup_hw_interface (vnm, last_sw_if_index); vlib_put_frame_to_node (vm, hw->tx_node_index, to_frame); } last_sw_if_index = sw_if_index0; hw = vnet_get_sup_hw_interface (vnm, sw_if_index0); to_frame = vlib_get_frame_to_node (vm, hw->tx_node_index); to_next = vlib_frame_vector_args (to_frame); } to_next[0] = bi0; to_next++; to_frame->n_vectors++; } vlib_put_frame_to_node (vm, hw->tx_node_index, to_frame); return from_frame->n_vectors; } /* *INDENT-OFF* */ VLIB_REGISTER_NODE (interface_tx) = { .function = interface_tx_node_fn, .name = "interface-tx", .vector_size = sizeof (u32), .n_next_nodes = 1, .next_nodes = { [0] = "error-drop", }, }; VNET_FEATURE_ARC_INIT (interface_output, static) = { .arc_name = "interface-output", .start_nodes = VNET_FEATURES (0), .last_in_arc = "interface-tx", .arc_index_ptr = &vnet_main.interface_main.output_feature_arc_index, }; VNET_FEATURE_INIT (span_tx, static) = { .arc_name = "interface-output", .node_name = "span-output", .runs_before = VNET_FEATURES ("interface-tx"), }; VNET_FEATURE_INIT (ipsec_if_tx, static) = { .arc_name = "interface-output", .node_name = "ipsec-if-output", .runs_before = VNET_FEATURES ("interface-tx"), }; VNET_FEATURE_INIT (interface_tx, static) = { .arc_name = "interface-output", .node_name = "interface-tx", .runs_before = 0, }; /* *INDENT-ON* */ #ifndef CLIB_MARCH_VARIANT clib_error_t * vnet_per_buffer_interface_output_hw_interface_add_del (vnet_main_t * vnm, u32 hw_if_index, u32 is_create) { vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index); u32 next_index; if (hi->output_node_index == 0) return 0; next_index = vlib_node_add_next (vnm->vlib_main, vnet_per_buffer_interface_output_node.index, hi->output_node_index); hi->output_node_next_index = next_index; return 0; } VNET_HW_INTERFACE_ADD_DEL_FUNCTION (vnet_per_buffer_interface_output_hw_interface_add_del); void vnet_set_interface_output_node (vnet_main_t * vnm, u32 hw_if_index, u32 node_index) { ASSERT (node_index); vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index); u32 next_index = vlib_node_add_next (vnm->vlib_main, vnet_per_buffer_interface_output_node.index, node_index); hi->output_node_next_index = next_index; hi->output_node_index = node_index; } #endif /* CLIB_MARCH_VARIANT */ /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */