dpdk: remove rte_mbuf modifications at many places in the code - vpp

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author	Damjan Marion <damarion@cisco.com>	2016-11-15 12:50:28 +0100
committer	Dave Barach <openvpp@barachs.net>	2016-11-23 22:12:25 +0000
commit	676554935a576db9f512b8b2ef81ba6723bb7ad6 (patch)
tree	796b94d3320e097789c5d6bc12f442f4cea9c2a1 /vnet/etc/scripts/mpls-o-ethernet/single.conf
parent	daa2cd1512ac46dfe116b89a34caf19a71994c45 (diff)

dpdk: remove rte_mbuf modifications at many places in the code

It is sole responsibility of dpdk tx function to fill/update rte_mbuf prior to sending packet do PMD. Change-Id: I8ca1dba3e7bef41034d36e3525831849f7ac4ac0 Signed-off-by: Damjan Marion <damarion@cisco.com>

Diffstat (limited to 'vnet/etc/scripts/mpls-o-ethernet/single.conf')

0 files changed, 0 insertions, 0 deletions

/* * 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/format.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/pcap_classify.h> #include <vnet/hash/hash.h> #include <vnet/interface_output.h> #include <vppinfra/vector/mask_compare.h> #include <vppinfra/vector/compress.h> #include <vppinfra/vector/count_equal.h> #include <vppinfra/vector/array_mask.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; } #endif /* CLIB_MARCH_VARIANT */ 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 void vnet_interface_output_handle_offload (vlib_main_t *vm, vlib_buffer_t *b) { vnet_calc_checksums_inline (vm, b, b->flags & VNET_BUFFER_F_IS_IP4, b->flags & VNET_BUFFER_F_IS_IP6); vnet_calc_outer_checksums_inline (vm, b); } static_always_inline uword vnet_interface_output_node_inline (vlib_main_t *vm, u32 sw_if_index, vlib_combined_counter_main_t *ccm, vlib_buffer_t **b, void **p, u32 config_index, u8 arc, u32 n_left, int processing_level) { u32 n_bytes = 0; u32 n_bytes0, n_bytes1, n_bytes2, n_bytes3; u32 ti = vm->thread_index; while (n_left >= 8) { 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); if (processing_level >= 1) or_flags = b[0]->flags | b[1]->flags | b[2]->flags | b[3]->flags; /* 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 += n_bytes0 = vlib_buffer_length_in_chain (vm, b[0]); n_bytes += n_bytes1 = vlib_buffer_length_in_chain (vm, b[1]); n_bytes += n_bytes2 = vlib_buffer_length_in_chain (vm, b[2]); n_bytes += n_bytes3 = vlib_buffer_length_in_chain (vm, b[3]); if (processing_level >= 3) { p[0] = vlib_buffer_get_current (b[0]); p[1] = vlib_buffer_get_current (b[1]); p[2] = vlib_buffer_get_current (b[2]); p[3] = vlib_buffer_get_current (b[3]); p += 4; } if (processing_level >= 2) { u32 tx_swif0, tx_swif1, tx_swif2, tx_swif3; 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]; /* update vlan subif tx counts, if required */ if (PREDICT_FALSE (tx_swif0 != sw_if_index)) vlib_increment_combined_counter (ccm, ti, tx_swif0, 1, n_bytes0); if (PREDICT_FALSE (tx_swif1 != sw_if_index)) vlib_increment_combined_counter (ccm, ti, tx_swif1, 1, n_bytes1); if (PREDICT_FALSE (tx_swif2 != sw_if_index)) vlib_increment_combined_counter (ccm, ti, tx_swif2, 1, n_bytes2); if (PREDICT_FALSE (tx_swif3 != sw_if_index)) vlib_increment_combined_counter (ccm, ti, tx_swif3, 1, n_bytes3); if (PREDICT_FALSE (config_index != ~0)) { vnet_buffer (b[0])->feature_arc_index = arc; b[0]->current_config_index = config_index; vnet_buffer (b[1])->feature_arc_index = arc; b[1]->current_config_index = config_index; vnet_buffer (b[2])->feature_arc_index = arc; b[2]->current_config_index = config_index; vnet_buffer (b[3])->feature_arc_index = arc; b[3]->current_config_index = config_index; } } if (processing_level >= 1 && (or_flags & VNET_BUFFER_F_OFFLOAD)) { vnet_interface_output_handle_offload (vm, b[0]); vnet_interface_output_handle_offload (vm, b[1]); vnet_interface_output_handle_offload (vm, b[2]); vnet_interface_output_handle_offload (vm, b[3]); } n_left -= 4; b += 4; } while (n_left) { /* Be grumpy about zero length buffers for benefit of driver tx function. */ ASSERT (b[0]->current_length > 0); n_bytes += n_bytes0 = vlib_buffer_length_in_chain (vm, b[0]); if (processing_level >= 3) { p[0] = vlib_buffer_get_current (b[0]); p += 1; } if (processing_level >= 2) { u32 tx_swif0 = vnet_buffer (b[0])->sw_if_index[VLIB_TX]; if (PREDICT_FALSE (config_index != ~0)) { vnet_buffer (b[0])->feature_arc_index = arc; b[0]->current_config_index = config_index; } if (PREDICT_FALSE (tx_swif0 != sw_if_index)) vlib_increment_combined_counter (ccm, ti, tx_swif0, 1, n_bytes0); } if (processing_level >= 1) vnet_interface_output_handle_offload (vm, b[0]); n_left -= 1; b += 1; } return n_bytes; } static_always_inline void vnet_interface_pcap_tx_trace (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame, int in_interface_ouput) { vnet_main_t *vnm = vnet_get_main (); u32 n_left_from, *from; u32 sw_if_index = ~0, hw_if_index = ~0; vnet_pcap_t *pp = &vnm->pcap; if (PREDICT_TRUE (pp->pcap_tx_enable == 0)) return; if (in_interface_ouput) { /* interface-output is called right before interface-output-template. * We only want to capture packets here if there is a per-interface * filter, in case it matches the sub-interface sw_if_index. * If there is no per-interface filter configured, let the * interface-output-template node deal with it */ if (pp->pcap_sw_if_index == 0) return; } else { vnet_interface_output_runtime_t *rt = (void *) node->runtime_data; sw_if_index = rt->sw_if_index; } n_left_from = frame->n_vectors; from = vlib_frame_vector_args (frame); while (n_left_from > 0) { u32 bi0 = from[0]; vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0); from++; n_left_from--; if (in_interface_ouput) { const u32 sii = vnet_buffer (b0)->sw_if_index[VLIB_TX]; if (PREDICT_FALSE (sii != sw_if_index)) { const vnet_hw_interface_t *hi = vnet_get_sup_hw_interface (vnm, sii); hw_if_index = hi->sw_if_index; sw_if_index = sii; } if (hw_if_index == sw_if_index) continue; /* defer to interface-output-template */ } if (vnet_is_packet_pcaped (pp, b0, sw_if_index)) pcap_add_buffer (&pp->pcap_main, vm, bi0, pp->max_bytes_per_pkt); } } static_always_inline void hash_func_with_mask (void **p, u32 *hash, u32 n_packets, u32 *lookup_table, u32 mask, vnet_hash_fn_t hf) { u32 n_left_from = n_packets; hf (p, hash, n_packets); clib_array_mask_u32 (hash, mask, n_packets); while (n_left_from >= 4) { hash[0] = lookup_table[hash[0]]; hash[1] = lookup_table[hash[1]]; hash[2] = lookup_table[hash[2]]; hash[3] = lookup_table[hash[3]]; hash += 4; n_left_from -= 4; } while (n_left_from > 0) { hash[0] = lookup_table[hash[0]]; hash += 1; n_left_from -= 1; } } static_always_inline void store_tx_frame_scalar_data (vnet_hw_if_tx_frame_t *copy_frame, vnet_hw_if_tx_frame_t *tf) { if (copy_frame) clib_memcpy_fast (tf, copy_frame, sizeof (vnet_hw_if_tx_frame_t)); } static_always_inline u32 enqueue_one_to_tx_node (vlib_main_t *vm, vlib_node_runtime_t *node, u32 *ppqi, u32 *from, vnet_hw_if_tx_frame_t *copy_frame, u32 n_vectors, u32 n_left, u32 next_index) { u32 tmp[VLIB_FRAME_SIZE]; u64 mask[VLIB_FRAME_SIZE / 64] = {}; vlib_frame_t *f; vnet_hw_if_tx_frame_t *tf; u32 *to; u32 n_copy = 0, n_free = 0; f = vlib_get_next_frame_internal (vm, node, next_index, 0); tf = vlib_frame_scalar_args (f); if (f->n_vectors > 0 && (!copy_frame || (tf->queue_id == copy_frame->queue_id))) { /* append current next frame */ n_free = VLIB_FRAME_SIZE - f->n_vectors; /* * if frame contains enough space for worst case scenario, * we can avoid use of tmp */ if (n_free >= n_left) to = (u32 *) vlib_frame_vector_args (f) + f->n_vectors; else to = tmp; } else { if (f->n_vectors > 0) { /* current frame doesn't fit - grab empty one */ f = vlib_get_next_frame_internal (vm, node, next_index, 1); tf = vlib_frame_scalar_args (f); } /* empty frame - store scalar data */ store_tx_frame_scalar_data (copy_frame, tf); to = vlib_frame_vector_args (f); n_free = VLIB_FRAME_SIZE; } /* * per packet queue id array * compare with given queue_id, if match, copy respective buffer index from * -> to */ if (ppqi) { clib_mask_compare_u32 (copy_frame->queue_id, ppqi, mask, n_vectors); n_copy = clib_compress_u32 (to, from, mask, n_vectors); if (n_copy == 0) return n_left; } else { /* * no work required, just copy all buffer indices from -> to */ n_copy = n_left; vlib_buffer_copy_indices (to, from, n_copy); } if (to != tmp) { /* indices already written to frame, just close it */ vlib_put_next_frame (vm, node, next_index, n_free - n_copy); } else if (n_free >= n_copy) { /* enough space in the existing frame */ to = (u32 *) vlib_frame_vector_args (f) + f->n_vectors; vlib_buffer_copy_indices (to, tmp, n_copy); vlib_put_next_frame (vm, node, next_index, n_free - n_copy); } else { /* full frame */ to = (u32 *) vlib_frame_vector_args (f) + f->n_vectors; vlib_buffer_copy_indices (to, tmp, n_free); vlib_put_next_frame (vm, node, next_index, 0); /* second frame */ u32 n_2nd_frame = n_copy - n_free; f = vlib_get_next_frame_internal (vm, node, next_index, 1); tf = vlib_frame_scalar_args (f); /* empty frame - store scalar data */ store_tx_frame_scalar_data (copy_frame, tf); to = vlib_frame_vector_args (f); vlib_buffer_copy_indices (to, tmp + n_free, n_2nd_frame); vlib_put_next_frame (vm, node, next_index, VLIB_FRAME_SIZE - n_2nd_frame); } return n_left - n_copy; } static_always_inline void enqueue_to_tx_node (vlib_main_t *vm, vlib_node_runtime_t *node, vnet_hw_interface_t *hi, u32 next_index, vnet_hw_if_output_node_runtime_t *r, u32 *from, void **p, u32 n_vectors) { u32 n_left = n_vectors; ASSERT (n_vectors <= VLIB_FRAME_SIZE); /* * backward compatible for drivers not integrated with new tx infra. */ if (r == 0) { n_left = enqueue_one_to_tx_node (vm, node, NULL, from, NULL, n_vectors, n_left, next_index); } /* * only 1 tx queue of given interface is available on given thread */ else if (r->n_queues == 1) { n_left = enqueue_one_to_tx_node (vm, node, NULL, from, r->frame, n_vectors, n_left, next_index); } /* * multi tx-queues use case */ else if (r->n_queues > 1) { u32 qids[VLIB_FRAME_SIZE]; hash_func_with_mask (p, qids, n_vectors, r->lookup_table, vec_len (r->lookup_table) - 1, hi->hf); for (u32 i = 0; i < r->n_queues; i++) { n_left = enqueue_one_to_tx_node (vm, node, qids, from, &r->frame[i], n_vectors, n_left, next_index); if (n_left == 0) break; } } else ASSERT (0); } VLIB_NODE_FN (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_interface_main_t *im = &vnm->interface_main; vlib_combined_counter_main_t *ccm; vnet_hw_interface_t *hi; vnet_sw_interface_t *si; vnet_interface_output_runtime_t *rt = (void *) node->runtime_data; vnet_hw_if_output_node_runtime_t *r = 0; vlib_buffer_t *bufs[VLIB_FRAME_SIZE]; u32 n_bytes, n_buffers = frame->n_vectors; u32 config_index = ~0; u32 sw_if_index = rt->sw_if_index; u32 next_index = VNET_INTERFACE_OUTPUT_NEXT_TX; u32 ti = vm->thread_index; u8 arc = im->output_feature_arc_index; int arc_or_subif = 0; int do_tx_offloads = 0; void *ptr[VLIB_FRAME_SIZE], **p = ptr; u8 is_parr = 0; u32 *from; if (node->flags & VLIB_NODE_FLAG_TRACE) vnet_interface_output_trace (vm, node, frame, n_buffers); from = vlib_frame_vector_args (frame); 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); vnet_interface_pcap_tx_trace (vm, node, frame, 0 /* in_interface_ouput */); vlib_get_buffers (vm, from, bufs, n_buffers); si = vnet_get_sw_interface (vnm, sw_if_index); hi = vnet_get_sup_hw_interface (vnm, 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, ti, 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); } if (hi->output_node_thread_runtimes) r = vec_elt_at_index (hi->output_node_thread_runtimes, vm->thread_index); if (r) { /* * tx queue of given interface is not available on given thread */ if (r->n_queues == 0) 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_NO_TX_QUEUE); /* * multiple tx queues available on given thread */ else if (r->n_queues > 1) /* construct array of pointer */ is_parr = 1; } /* interface-output feature arc handling */ if (PREDICT_FALSE (vnet_have_features (arc, sw_if_index))) { vnet_feature_config_main_t *fcm; fcm = vnet_feature_get_config_main (arc); config_index = vnet_get_feature_config_index (arc, sw_if_index); vnet_get_config_data (&fcm->config_main, &config_index, &next_index, 0); arc_or_subif = 1; } else if (hash_elts (hi->sub_interface_sw_if_index_by_id)) arc_or_subif = 1; ccm = im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_TX; /* if not all three flags IP4_,TCP_,UDP_CKSUM set, do compute them * here before sending to the interface */ if ((hi->caps & VNET_HW_INTERFACE_CAP_SUPPORTS_TX_CKSUM) != VNET_HW_INTERFACE_CAP_SUPPORTS_TX_CKSUM) do_tx_offloads = 1; // basic processing if (do_tx_offloads == 0 && arc_or_subif == 0 && is_parr == 0) n_bytes = vnet_interface_output_node_inline ( vm, sw_if_index, ccm, bufs, NULL, config_index, arc, n_buffers, 0); // basic processing + tx offloads else if (do_tx_offloads == 1 && arc_or_subif == 0 && is_parr == 0) n_bytes = vnet_interface_output_node_inline ( vm, sw_if_index, ccm, bufs, NULL, config_index, arc, n_buffers, 1); // basic processing + tx offloads + vlans + arcs else if (do_tx_offloads == 1 && arc_or_subif == 1 && is_parr == 0) n_bytes = vnet_interface_output_node_inline ( vm, sw_if_index, ccm, bufs, NULL, config_index, arc, n_buffers, 2); // basic processing + tx offloads + vlans + arcs + multi-txqs else n_bytes = vnet_interface_output_node_inline ( vm, sw_if_index, ccm, bufs, p, config_index, arc, n_buffers, 3); from = vlib_frame_vector_args (frame); if (PREDICT_TRUE (next_index == VNET_INTERFACE_OUTPUT_NEXT_TX)) { enqueue_to_tx_node (vm, node, hi, next_index, r, from, ptr, frame->n_vectors); } else { vlib_buffer_enqueue_to_single_next (vm, node, from, next_index, frame->n_vectors); } /* Update main interface stats. */ vlib_increment_combined_counter (ccm, ti, sw_if_index, n_buffers, n_bytes); return n_buffers; } VLIB_REGISTER_NODE (vnet_interface_output_node) = { .name = "interface-output-template", .vector_size = sizeof (u32), }; /* 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 /* in_interface_ouput */); 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) { if (PREDICT_TRUE (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; 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; if (!vnet_is_packet_pcaped (pp, b0, ~0)) continue; /* not matching, skip */ /* Trace all drops, or drops received on a specific interface */ 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->counters_heap[b0->error].name, 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->counters_heap[b0->error].name, 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_main_t *vnm = vnet_get_main (); vnet_interface_main_t *im = &vnet_get_main ()->interface_main; vnet_pcap_t *pp = &vnm->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* */ VLIB_REGISTER_NODE (vnet_per_buffer_interface_output_node) = { .name = "interface-output", .vector_size = sizeof (u32), }; VLIB_NODE_FN (vnet_interface_output_arc_end_node) (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame) { vnet_main_t *vnm = vnet_get_main (); vnet_interface_main_t *im = &vnm->interface_main; vnet_hw_interface_t *hi; vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs; u32 sw_if_indices[VLIB_FRAME_SIZE], *sw_if_index = sw_if_indices; u64 used_elts[VLIB_FRAME_SIZE / 64] = {}; u64 mask[VLIB_FRAME_SIZE / 64] = {}; u32 *tmp, *from, n_left, n_comp, n_p_comp, swif, off; u16 next_index; void *ptr[VLIB_FRAME_SIZE], **p = ptr; from = vlib_frame_vector_args (frame); n_left = frame->n_vectors; vlib_get_buffers (vm, from, bufs, n_left); while (n_left >= 8) { 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); p[0] = vlib_buffer_get_current (b[0]); p[1] = vlib_buffer_get_current (b[1]); p[2] = vlib_buffer_get_current (b[2]); p[3] = vlib_buffer_get_current (b[3]); sw_if_index[0] = vnet_buffer (b[0])->sw_if_index[VLIB_TX]; sw_if_index[1] = vnet_buffer (b[1])->sw_if_index[VLIB_TX]; sw_if_index[2] = vnet_buffer (b[2])->sw_if_index[VLIB_TX]; sw_if_index[3] = vnet_buffer (b[3])->sw_if_index[VLIB_TX]; p += 4; b += 4; sw_if_index += 4; n_left -= 4; } while (n_left) { p[0] = vlib_buffer_get_current (b[0]); sw_if_index[0] = vnet_buffer (b[0])->sw_if_index[VLIB_TX]; p++; b++; sw_if_index++; n_left--; } n_left = frame->n_vectors; swif = sw_if_indices[0]; off = 0; /* a bit ugly but it allows us to reuse stack space for temporary store * which may also improve memory latency */ tmp = (u32 *) bufs; more: next_index = vec_elt (im->if_out_arc_end_next_index_by_sw_if_index, swif); hi = vnet_get_sup_hw_interface (vnm, swif); vnet_hw_if_output_node_runtime_t *r = 0; void *ptr_tmp[VLIB_FRAME_SIZE], **p_tmp = ptr_tmp; if (hi->output_node_thread_runtimes) r = vec_elt_at_index (hi->output_node_thread_runtimes, vm->thread_index); /* compare and compress based on comparison mask */ clib_mask_compare_u32 (swif, sw_if_indices, mask, frame->n_vectors); n_comp = clib_compress_u32 (tmp, from, mask, frame->n_vectors); /* * tx queue of given interface is not available on given thread */ if (r) { if (r->n_queues == 0) { vlib_error_drop_buffers ( vm, node, tmp, /* buffer stride */ 1, n_comp, VNET_INTERFACE_OUTPUT_NEXT_DROP, node->node_index, VNET_INTERFACE_OUTPUT_ERROR_NO_TX_QUEUE); goto drop; } else if (r->n_queues > 1) { n_p_comp = clib_compress_u64 ((u64 *) p_tmp, (u64 *) ptr, mask, frame->n_vectors); ASSERT (n_p_comp == n_comp); } } enqueue_to_tx_node (vm, node, hi, next_index, r, tmp, ptr_tmp, n_comp); drop: n_left -= n_comp; if (n_left) { /* store comparison mask so we can find next unused element */ for (int i = 0; i < ARRAY_LEN (used_elts); i++) used_elts[i] |= mask[i]; /* fine first unused sw_if_index by scanning trough used_elts bitmap */ while (PREDICT_FALSE (used_elts[off] == ~0)) off++; swif = sw_if_indices[(off << 6) + count_trailing_zeros (~used_elts[off])]; goto more; } return frame->n_vectors; } VLIB_REGISTER_NODE (vnet_interface_output_arc_end_node) = { .name = "interface-output-arc-end", .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-output-arc-end", .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-output-arc-end"), }; VNET_FEATURE_INIT (ipsec_if_tx, static) = { .arc_name = "interface-output", .node_name = "ipsec-if-output", .runs_before = VNET_FEATURES ("interface-output-arc-end"), }; VNET_FEATURE_INIT (interface_output_arc_end, static) = { .arc_name = "interface-output", .node_name = "interface-output-arc-end", .runs_before = 0, }; #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: */


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