vlib: move offload flags to 1st cacheline in vlib_buffer_t - vpp

diff options

author	Mohsin Kazmi <sykazmi@cisco.com>	2021-04-23 15:16:50 +0200
committer	Damjan Marion <dmarion@me.com>	2021-05-05 11:10:51 +0000
commit	a7e830ed468f35590871988e68153222325870b8 (patch)
tree	6a92f425056bf061e7df502e9c6235cfaf2ca62a /src/vnet/ip/ip4_forward.c
parent	baa18701b9d54d8924771c25b96bd5d99472b7ad (diff)

vlib: move offload flags to 1st cacheline in vlib_buffer_t

Type: improvement Some tests i.e. ipsec see performance regression when offload flags are moved to 2nd cacheline. This patch moves them back to 1st cacheline. Change-Id: I6ead45ff6d2c467b0d248f409e27c2ba31758741 Signed-off-by: Mohsin Kazmi <sykazmi@cisco.com>

Diffstat (limited to 'src/vnet/ip/ip4_forward.c')

-rw-r--r--

src/vnet/ip/ip4_forward.c

1 files changed, 2 insertions, 2 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/ip/ip4.h> #include <vnet/ip/ip6.h> #include <vnet/udp/udp_packet.h> #include <vnet/feature/feature.h> typedef struct { u32 sw_if_index; u8 data[128 - sizeof (u32)]; } interface_output_trace_t; 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\n%U%U", t->sw_if_index, format_white_space, indent, node->format_buffer ? node-> format_buffer : format_hex_bytes, t->data, sizeof (t->data)); } else { si = vnet_get_sw_interface (vnm, t->sw_if_index); s = format (s, "%U\n%U%U", format_vnet_sw_interface_name, vnm, si, 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]; 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]; 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]; clib_memcpy_fast (t0->data, vlib_buffer_get_current (b0), sizeof (t0->data)); } from += 1; n_left -= 1; } } static_always_inline void calc_checksums (vlib_main_t * vm, vlib_buffer_t * b) { ip4_header_t *ip4; ip6_header_t *ip6; tcp_header_t *th; udp_header_t *uh; int is_ip4 = (b->flags & VNET_BUFFER_F_IS_IP4) != 0; int is_ip6 = (b->flags & VNET_BUFFER_F_IS_IP6) != 0; ASSERT (!(is_ip4 && is_ip6)); ip4 = (ip4_header_t *) (b->data + vnet_buffer (b)->l3_hdr_offset); ip6 = (ip6_header_t *) (b->data + vnet_buffer (b)->l3_hdr_offset); th = (tcp_header_t *) (b->data + vnet_buffer (b)->l4_hdr_offset); uh = (udp_header_t *) (b->data + vnet_buffer (b)->l4_hdr_offset); if (is_ip4) { ip4 = (ip4_header_t *) (b->data + vnet_buffer (b)->l3_hdr_offset); if (b->flags & VNET_BUFFER_F_OFFLOAD_IP_CKSUM) ip4->checksum = ip4_header_checksum (ip4); if (b->flags & VNET_BUFFER_F_OFFLOAD_TCP_CKSUM) { th->checksum = 0; th->checksum = ip4_tcp_udp_compute_checksum (vm, b, ip4); } if (b->flags & VNET_BUFFER_F_OFFLOAD_UDP_CKSUM) uh->checksum = ip4_tcp_udp_compute_checksum (vm, b, ip4); } if (is_ip6) { int bogus; if (b->flags & VNET_BUFFER_F_OFFLOAD_TCP_CKSUM) th->checksum = ip6_tcp_udp_icmp_compute_checksum (vm, b, ip6, &bogus); if (b->flags & VNET_BUFFER_F_OFFLOAD_UDP_CKSUM) uh->checksum = ip6_tcp_udp_icmp_compute_checksum (vm, b, ip6, &bogus); } b->flags &= ~VNET_BUFFER_F_OFFLOAD_TCP_CKSUM; b->flags &= ~VNET_BUFFER_F_OFFLOAD_UDP_CKSUM; b->flags &= ~VNET_BUFFER_F_OFFLOAD_IP_CKSUM; } 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; 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); 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 | VNET_SW_INTERFACE_FLAG_BOND_SLAVE)) || !(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, &current_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; vlib_buffer_t *b0, *b1, *b2, *b3; u32 tx_swif0, tx_swif1, tx_swif2, tx_swif3; u32 or_flags; /* Prefetch next iteration. */ vlib_prefetch_buffer_with_index (vm, from[4], LOAD); vlib_prefetch_buffer_with_index (vm, from[5], LOAD); vlib_prefetch_buffer_with_index (vm, from[6], LOAD); vlib_prefetch_buffer_with_index (vm, from[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; from += 4; to_tx += 4; n_left_to_tx -= 4; b0 = vlib_get_buffer (vm, bi0); b1 = vlib_get_buffer (vm, bi1); b2 = vlib_get_buffer (vm, bi2); b3 = vlib_get_buffer (vm, bi3); /* Be grumpy about zero length buffers for benefit of driver tx function. */ ASSERT (b0->current_length > 0); ASSERT (b1->current_length > 0); ASSERT (b2->current_length > 0); ASSERT (b3->current_length > 0); n_bytes_b0 = vlib_buffer_length_in_chain (vm, b0); n_bytes_b1 = vlib_buffer_length_in_chain (vm, b1); n_bytes_b2 = vlib_buffer_length_in_chain (vm, b2); n_bytes_b3 = vlib_buffer_length_in_chain (vm, b3); tx_swif0 = vnet_buffer (b0)->sw_if_index[VLIB_TX]; tx_swif1 = vnet_buffer (b1)->sw_if_index[VLIB_TX]; tx_swif2 = vnet_buffer (b2)->sw_if_index[VLIB_TX]; tx_swif3 = vnet_buffer (b3)->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 (b0)->feature_arc_index = arc; vnet_buffer (b1)->feature_arc_index = arc; vnet_buffer (b2)->feature_arc_index = arc; vnet_buffer (b3)->feature_arc_index = arc; b0->current_config_index = current_config_index; b1->current_config_index = current_config_index; b2->current_config_index = current_config_index; b3->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); } or_flags = b0->flags | b1->flags | b2->flags | b3->flags; if (do_tx_offloads) { if (or_flags & (VNET_BUFFER_F_OFFLOAD_TCP_CKSUM | VNET_BUFFER_F_OFFLOAD_UDP_CKSUM | VNET_BUFFER_F_OFFLOAD_IP_CKSUM)) { calc_checksums (vm, b0); calc_checksums (vm, b1); calc_checksums (vm, b2); calc_checksums (vm, b3); } } } while (from + 1 <= from_end && n_left_to_tx >= 1) { u32 bi0; vlib_buffer_t *b0; u32 tx_swif0; bi0 = from[0]; to_tx[0] = bi0; from += 1; to_tx += 1; n_left_to_tx -= 1; b0 = vlib_get_buffer (vm, bi0); /* Be grumpy about zero length buffers for benefit of driver tx function. */ ASSERT (b0->current_length > 0); n_bytes_b0 = vlib_buffer_length_in_chain (vm, b0); tx_swif0 = vnet_buffer (b0)->sw_if_index[VLIB_TX]; n_bytes += n_bytes_b0; n_packets += 1; if (PREDICT_FALSE (current_config_index != ~0)) { vnet_buffer (b0)->feature_arc_index = arc; b0->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) calc_checksums (vm, b0); } 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; } 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); 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); } /* Use buffer's sw_if_index[VNET_TX] to choose output interface. */ static uword vnet_per_buffer_interface_output (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; 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; } always_inline u32 counter_index (vlib_main_t * vm, vlib_error_t e) { vlib_node_t *n; u32 ci, ni; ni = vlib_error_get_node (e); n = vlib_get_node (vm, ni); ci = vlib_error_get_code (e); ASSERT (ci < n->n_errors); ci += n->error_heap_index; return ci; } static u8 * format_vnet_error_trace (u8 * s, va_list * va) { vlib_main_t *vm = va_arg (*va, vlib_main_t *); CLIB_UNUSED (vlib_node_t * node) = va_arg (*va, vlib_node_t *); vlib_error_t *e = va_arg (*va, vlib_error_t *); vlib_node_t *error_node; vlib_error_main_t *em = &vm->error_main; u32 i; error_node = vlib_get_node (vm, vlib_error_get_node (e[0])); i = counter_index (vm, e[0]); s = format (s, "%v: %s", error_node->name, em->error_strings_heap[i]); return s; } static void trace_errors_with_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; vlib_error_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, sizeof (t0[0])); t0[0] = b0->error; } if (b1->flags & VLIB_BUFFER_IS_TRACED) { t1 = vlib_add_trace (vm, node, b1, sizeof (t1[0])); t1[0] = b1->error; } buffers += 2; n_left -= 2; } while (n_left >= 1) { u32 bi0; vlib_buffer_t *b0; vlib_error_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, sizeof (t0[0])); t0[0] = b0->error; } buffers += 1; n_left -= 1; } } static u8 * validate_error (vlib_main_t * vm, vlib_error_t * e, u32 index) { uword node_index = vlib_error_get_node (e[0]); uword code = vlib_error_get_code (e[0]); vlib_node_t *n; if (node_index >= vec_len (vm->node_main.nodes)) return format (0, "[%d], node index out of range 0x%x, error 0x%x", index, node_index, e[0]); n = vlib_get_node (vm, node_index); if (code >= n->n_errors) return format (0, "[%d], code %d out of range for node %v", index, code, n->name); return 0; } static u8 * validate_error_frame (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * f) { u32 *buffers = vlib_frame_vector_args (f); vlib_buffer_t *b; u8 *msg = 0; uword i; for (i = 0; i < f->n_vectors; i++) { b = vlib_get_buffer (vm, buffers[i]); msg = validate_error (vm, &b->error, i); if (msg) return msg; } return msg; } typedef enum { VNET_ERROR_DISPOSITION_DROP, VNET_ERROR_DISPOSITION_PUNT, VNET_ERROR_N_DISPOSITION, } vnet_error_disposition_t; always_inline void do_packet (vlib_main_t * vm, vlib_error_t a) { vlib_error_main_t *em = &vm->error_main; u32 i = counter_index (vm, a); em->counters[i] += 1; vlib_error_elog_count (vm, i, 1); } static_always_inline uword process_drop_punt (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame, vnet_error_disposition_t disposition) { vnet_main_t *vnm = vnet_get_main (); vlib_error_main_t *em = &vm->error_main; u32 *buffers, *first_buffer; vlib_error_t current_error; u32 current_counter_index, n_errors_left; u32 current_sw_if_index, n_errors_current_sw_if_index; u64 current_counter; vlib_simple_counter_main_t *cm; u32 thread_index = vm->thread_index; static vlib_error_t memory[VNET_ERROR_N_DISPOSITION]; static char memory_init[VNET_ERROR_N_DISPOSITION]; buffers = vlib_frame_vector_args (frame); first_buffer = buffers; { vlib_buffer_t *b = vlib_get_buffer (vm, first_buffer[0]); if (!memory_init[disposition]) { memory_init[disposition] = 1; memory[disposition] = b->error; } current_sw_if_index = vnet_buffer (b)->sw_if_index[VLIB_RX]; n_errors_current_sw_if_index = 0; } current_error = memory[disposition]; current_counter_index = counter_index (vm, memory[disposition]); current_counter = em->counters[current_counter_index]; if (node->flags & VLIB_NODE_FLAG_TRACE) trace_errors_with_buffers (vm, node, frame); n_errors_left = frame->n_vectors; cm = vec_elt_at_index (vnm->interface_main.sw_if_counters, (disposition == VNET_ERROR_DISPOSITION_PUNT ? VNET_INTERFACE_COUNTER_PUNT : VNET_INTERFACE_COUNTER_DROP)); while (n_errors_left >= 2) { vlib_buffer_t *b0, *b1; vnet_sw_interface_t *sw_if0, *sw_if1; vlib_error_t e0, e1; u32 bi0, bi1; u32 sw_if_index0, sw_if_index1; bi0 = buffers[0]; bi1 = buffers[1]; buffers += 2; n_errors_left -= 2; b0 = vlib_get_buffer (vm, bi0); b1 = vlib_get_buffer (vm, bi1); e0 = b0->error; e1 = b1->error; sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX]; sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_RX]; /* Speculate that sw_if_index == sw_if_index[01]. */ n_errors_current_sw_if_index += 2; /* Speculatively assume all 2 (node, code) pairs are equal to current (node, code). */ current_counter += 2; if (PREDICT_FALSE (e0 != current_error || e1 != current_error || sw_if_index0 != current_sw_if_index || sw_if_index1 != current_sw_if_index)) { current_counter -= 2; n_errors_current_sw_if_index -= 2; vlib_increment_simple_counter (cm, thread_index, sw_if_index0, 1); vlib_increment_simple_counter (cm, thread_index, sw_if_index1, 1); /* Increment super-interface drop/punt counters for sub-interfaces. */ sw_if0 = vnet_get_sw_interface (vnm, sw_if_index0); vlib_increment_simple_counter (cm, thread_index, sw_if0->sup_sw_if_index, sw_if0->sup_sw_if_index != sw_if_index0); sw_if1 = vnet_get_sw_interface (vnm, sw_if_index1); vlib_increment_simple_counter (cm, thread_index, sw_if1->sup_sw_if_index, sw_if1->sup_sw_if_index != sw_if_index1); em->counters[current_counter_index] = current_counter; do_packet (vm, e0); do_packet (vm, e1); /* For 2 repeated errors, change current error. */ if (e0 == e1 && e1 != current_error) { current_error = e0; current_counter_index = counter_index (vm, e0); } current_counter = em->counters[current_counter_index]; } } while (n_errors_left >= 1) { vlib_buffer_t *b0; vnet_sw_interface_t *sw_if0; vlib_error_t e0; u32 bi0, sw_if_index0; bi0 = buffers[0]; buffers += 1; n_errors_left -= 1; current_counter += 1; b0 = vlib_get_buffer (vm, bi0); e0 = b0->error; sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX]; /* Increment drop/punt counters. */ vlib_increment_simple_counter (cm, thread_index, sw_if_index0, 1); /* Increment super-interface drop/punt counters for sub-interfaces. */ sw_if0 = vnet_get_sw_interface (vnm, sw_if_index0); vlib_increment_simple_counter (cm, thread_index, sw_if0->sup_sw_if_index, sw_if0->sup_sw_if_index != sw_if_index0); if (PREDICT_FALSE (e0 != current_error)) { current_counter -= 1; vlib_error_elog_count (vm, current_counter_index, (current_counter - em->counters[current_counter_index])); em->counters[current_counter_index] = current_counter; do_packet (vm, e0); current_error = e0; current_counter_index = counter_index (vm, e0); current_counter = em->counters[current_counter_index]; } } if (n_errors_current_sw_if_index > 0) { vnet_sw_interface_t *si; vlib_increment_simple_counter (cm, thread_index, current_sw_if_index, n_errors_current_sw_if_index); si = vnet_get_sw_interface (vnm, current_sw_if_index); if (si->sup_sw_if_index != current_sw_if_index) vlib_increment_simple_counter (cm, thread_index, si->sup_sw_if_index, n_errors_current_sw_if_index); } vlib_error_elog_count (vm, current_counter_index, (current_counter - em->counters[current_counter_index])); /* Return cached counter. */ em->counters[current_counter_index] = current_counter; /* Save memory for next iteration. */ memory[disposition] = current_error; if (disposition == VNET_ERROR_DISPOSITION_DROP || !vm->os_punt_frame) { vlib_buffer_free (vm, first_buffer, frame->n_vectors); /* If there is no punt function, free the frame as well. */ if (disposition == VNET_ERROR_DISPOSITION_PUNT && !vm->os_punt_frame) vlib_frame_free (vm, node, frame); } else vm->os_punt_frame (vm, node, frame); return frame->n_vectors; } static inline void pcap_drop_trace (vlib_main_t * vm, vnet_interface_main_t * im, 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; 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; /* Trace all drops, or drops received on a specific interface */ if (im->pcap_sw_if_index == 0 || im->pcap_sw_if_index == vnet_buffer (b0)->sw_if_index[VLIB_RX]) { save_current_data = b0->current_data; save_current_length = b0->current_length; /* * Typically, we'll need to rewind the buffer */ if (b0->current_data > 0) vlib_buffer_advance (b0, (word) - b0->current_data); pcap_add_buffer (&im->pcap_main, vm, bi0, 512); b0->current_data = save_current_data; b0->current_length = save_current_length; } } } 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); } static uword process_drop (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) { vnet_interface_main_t *im = &vnet_get_main ()->interface_main; if (PREDICT_FALSE (im->drop_pcap_enable)) pcap_drop_trace (vm, im, frame); return process_drop_punt (vm, node, frame, VNET_ERROR_DISPOSITION_DROP); } static uword process_punt (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) { return process_drop_punt (vm, node, frame, VNET_ERROR_DISPOSITION_PUNT); } /* *INDENT-OFF* */ VLIB_REGISTER_NODE (drop_buffers,static) = { .function = process_drop, .name = "error-drop", .flags = VLIB_NODE_FLAG_IS_DROP, .vector_size = sizeof (u32), .format_trace = format_vnet_error_trace, .validate_frame = validate_error_frame, }; /* *INDENT-ON* */ VLIB_NODE_FUNCTION_MULTIARCH (drop_buffers, process_drop); /* *INDENT-OFF* */ VLIB_REGISTER_NODE (punt_buffers,static) = { .function = process_punt, .flags = (VLIB_NODE_FLAG_FRAME_NO_FREE_AFTER_DISPATCH | VLIB_NODE_FLAG_IS_PUNT), .name = "error-punt", .vector_size = sizeof (u32), .format_trace = format_vnet_error_trace, .validate_frame = validate_error_frame, }; /* *INDENT-ON* */ VLIB_NODE_FUNCTION_MULTIARCH (punt_buffers, process_punt); /* *INDENT-OFF* */ VLIB_REGISTER_NODE (vnet_per_buffer_interface_output_node,static) = { .function = vnet_per_buffer_interface_output, .name = "interface-output", .vector_size = sizeof (u32), }; /* *INDENT-ON* */ /* Convenience node to drop a vector of buffers with a "misc error". */ static uword misc_drop_buffers (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) { return vlib_error_drop_buffers (vm, node, vlib_frame_vector_args (frame), /* buffer stride */ 1, frame->n_vectors, /* next */ 0, node->node_index, /* error */ 0); } static char *misc_drop_buffers_error_strings[] = { [0] = "misc. errors", }; /* *INDENT-OFF* */ VLIB_REGISTER_NODE (misc_drop_buffers_node,static) = { .function = misc_drop_buffers, .name = "misc-drop-buffers", .vector_size = sizeof (u32), .n_errors = 1, .n_next_nodes = 1, .next_nodes = { "error-drop", }, .error_strings = misc_drop_buffers_error_strings, }; /* *INDENT-ON* */ VLIB_NODE_FUNCTION_MULTIARCH (vnet_per_buffer_interface_output_node, vnet_per_buffer_interface_output); 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, static) = { .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* */ 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; } static clib_error_t * pcap_drop_trace_command_fn (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd) { vnet_main_t *vnm = vnet_get_main (); vnet_interface_main_t *im = &vnm->interface_main; u8 *filename; u32 max; int matched = 0; clib_error_t *error = 0; while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) { if (unformat (input, "on")) { if (im->drop_pcap_enable == 0) { if (im->pcap_filename == 0) im->pcap_filename = format (0, "/tmp/drop.pcap%c", 0); clib_memset (&im->pcap_main, 0, sizeof (im->pcap_main)); im->pcap_main.file_name = (char *) im->pcap_filename; im->pcap_main.n_packets_to_capture = 100; if (im->pcap_pkts_to_capture) im->pcap_main.n_packets_to_capture = im->pcap_pkts_to_capture; im->pcap_main.packet_type = PCAP_PACKET_TYPE_ethernet; im->drop_pcap_enable = 1; matched = 1; vlib_cli_output (vm, "pcap drop capture on..."); } else { vlib_cli_output (vm, "pcap drop capture already on..."); } matched = 1; } else if (unformat (input, "off")) { matched = 1; if (im->drop_pcap_enable) { vlib_cli_output (vm, "captured %d pkts...", im->pcap_main.n_packets_captured); if (im->pcap_main.n_packets_captured) { im->pcap_main.n_packets_to_capture = im->pcap_main.n_packets_captured; error = pcap_write (&im->pcap_main); if (error) clib_error_report (error); else vlib_cli_output (vm, "saved to %s...", im->pcap_filename); } } else { vlib_cli_output (vm, "pcap drop capture already off..."); } im->drop_pcap_enable = 0; } else if (unformat (input, "max %d", &max)) { im->pcap_pkts_to_capture = max; matched = 1; } else if (unformat (input, "intfc %U", unformat_vnet_sw_interface, vnm, &im->pcap_sw_if_index)) matched = 1; else if (unformat (input, "intfc any")) { im->pcap_sw_if_index = 0; matched = 1; } else if (unformat (input, "file %s", &filename)) { u8 *chroot_filename; /* Brain-police user path input */ if (strstr ((char *) filename, "..") || index ((char *) filename, '/')) { vlib_cli_output (vm, "illegal characters in filename '%s'", filename); continue; } chroot_filename = format (0, "/tmp/%s%c", filename, 0); vec_free (filename); if (im->pcap_filename) vec_free (im->pcap_filename); im->pcap_filename = chroot_filename; im->pcap_main.file_name = (char *) im->pcap_filename; matched = 1; } else if (unformat (input, "status")) { if (im->drop_pcap_enable == 0) { vlib_cli_output (vm, "pcap drop capture is off..."); continue; } vlib_cli_output (vm, "pcap drop capture: %d of %d pkts...", im->pcap_main.n_packets_captured, im->pcap_main.n_packets_to_capture); matched = 1; } else break; } if (matched == 0) return clib_error_return (0, "unknown input `%U'", format_unformat_error, input); return 0; } /* *INDENT-OFF* */ VLIB_CLI_COMMAND (pcap_trace_command, static) = { .path = "pcap drop trace", .short_help = "pcap drop trace on off max <nn> intfc <intfc> file <name> status", .function = pcap_drop_trace_command_fn, }; /* *INDENT-ON* */ /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */


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