/* * 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. */ #ifndef __IP_PUNT_DROP_H__ #define __IP_PUNT_DROP_H__ #include <vnet/ip/ip.h> #include <vnet/policer/policer.h> #include <vnet/policer/police_inlines.h> /** * IP4 punt policer configuration * we police the punt rate to prevent overloading the host */ typedef struct ip_punt_policer_t_ { u32 policer_index; u32 fq_index; } ip_punt_policer_t; typedef enum ip_punt_policer_next_t_ { IP_PUNT_POLICER_NEXT_DROP, IP_PUNT_POLICER_NEXT_HANDOFF, IP_PUNT_POLICER_N_NEXT, } ip_punt_policer_next_t; typedef struct ip_punt_policer_trace_t_ { u32 policer_index; u32 next; } ip_punt_policer_trace_t; #define foreach_ip_punt_policer_error \ _(DROP, "ip punt policer drop") typedef enum { #define _(sym,str) IP_PUNT_POLICER_ERROR_##sym, foreach_ip_punt_policer_error #undef _ IP4_PUNT_POLICER_N_ERROR, } ip_punt_policer_error_t; extern u8 *format_ip_punt_policer_trace (u8 * s, va_list * args); extern vlib_node_registration_t ip4_punt_policer_node; extern ip_punt_policer_t ip4_punt_policer_cfg; extern vlib_node_registration_t ip6_punt_policer_node; extern ip_punt_policer_t ip6_punt_policer_cfg; /** * IP punt policing node function */ always_inline uword ip_punt_policer (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame, u8 arc_index, u32 policer_index) { u32 *from, *to_next, n_left_from, n_left_to_next, next_index; u64 time_in_policer_periods; vnet_feature_main_t *fm = &feature_main; vnet_feature_config_main_t *cm = &fm->feature_config_mains[arc_index]; time_in_policer_periods = clib_cpu_time_now () >> POLICER_TICKS_PER_PERIOD_SHIFT; from = vlib_frame_vector_args (frame); n_left_from = frame->n_vectors; 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) { vlib_buffer_t *b0, *b1; u32 next0, next1; u8 act0, act1; u32 bi0, bi1; next0 = next1 = 0; bi0 = to_next[0] = from[0]; bi1 = to_next[1] = from[1]; from += 2; n_left_from -= 2; to_next += 2; n_left_to_next -= 2; b0 = vlib_get_buffer (vm, bi0); b1 = vlib_get_buffer (vm, bi1); act0 = vnet_policer_police (vm, b0, policer_index, time_in_policer_periods, POLICE_CONFORM, true); act1 = vnet_policer_police (vm, b1, policer_index, time_in_policer_periods, POLICE_CONFORM, true); if (PREDICT_FALSE (act0 == QOS_ACTION_HANDOFF)) { next0 = next1 = IP_PUNT_POLICER_NEXT_HANDOFF; } else { vnet_get_config_data (&cm->config_main, &b0->current_config_index, &next0, 0); vnet_get_config_data (&cm->config_main, &b1->current_config_index, &next1, 0); if (PREDICT_FALSE (act0 == QOS_ACTION_DROP)) { next0 = IP_PUNT_POLICER_NEXT_DROP; b0->error = node->errors[IP_PUNT_POLICER_ERROR_DROP]; } if (PREDICT_FALSE (act1 == QOS_ACTION_DROP)) { next1 = IP_PUNT_POLICER_NEXT_DROP; b1->error = node->errors[IP_PUNT_POLICER_ERROR_DROP]; } if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED)) { ip_punt_policer_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t)); t->next = next0; t->policer_index = policer_index; } if (PREDICT_FALSE (b1->flags & VLIB_BUFFER_IS_TRACED)) { ip_punt_policer_trace_t *t = vlib_add_trace (vm, node, b1, sizeof (*t)); t->next = next1; t->policer_index = policer_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) { vlib_buffer_t *b0; u32 next0; u32 bi0; u8 act0; next0 = 0; bi0 = to_next[0] = from[0]; from += 1; n_left_from -= 1; to_next += 1; n_left_to_next -= 1; b0 = vlib_get_buffer (vm, bi0); act0 = vnet_policer_police (vm, b0, policer_index, time_in_policer_periods, POLICE_CONFORM, true); if (PREDICT_FALSE (act0 == QOS_ACTION_HANDOFF)) { next0 = IP_PUNT_POLICER_NEXT_HANDOFF; } else { vnet_get_config_data (&cm->config_main, &b0->current_config_index, &next0, 0); if (PREDICT_FALSE (act0 == QOS_ACTION_DROP)) { next0 = IP_PUNT_POLICER_NEXT_DROP; b0->error = node->errors[IP_PUNT_POLICER_ERROR_DROP]; } if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED)) { ip_punt_policer_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t)); t->next = next0; t->policer_index = policer_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; } /** * IP4 punt redirect per-rx interface configuration * redirect punted traffic to another location. */ typedef struct ip_punt_redirect_rx_t_ { /** * Node linkage into the FIB graph */ fib_node_t node; fib_protocol_t fproto; fib_forward_chain_type_t payload_type; fib_node_index_t pl; u32 sibling; /** * redirect forwarding */ dpo_id_t dpo; } ip_punt_redirect_rx_t; /** * IP punt redirect configuration */ typedef struct ip_punt_redirect_t_ { ip_punt_redirect_rx_t *pool; /** * per-RX interface configuration. * sw_if_index = 0 (from which packets are never received) is used to * indicate 'from-any' */ index_t *redirect_by_rx_sw_if_index[FIB_PROTOCOL_IP_MAX]; } ip_punt_redirect_cfg_t; extern ip_punt_redirect_cfg_t ip_punt_redirect_cfg; /** * IP punt redirect next nodes */ typedef enum ip_punt_redirect_next_t_ { IP_PUNT_REDIRECT_NEXT_DROP, IP_PUNT_REDIRECT_NEXT_TX, IP_PUNT_REDIRECT_NEXT_ARP, IP_PUNT_REDIRECT_N_NEXT, } ip_punt_redirect_next_t; /** * IP Punt redirect trace */ typedef struct ip4_punt_redirect_trace_t_ { index_t rrxi; u32 next; } ip_punt_redirect_trace_t; /** * Add a punt redirect entry */ extern void ip_punt_redirect_add (fib_protocol_t fproto, u32 rx_sw_if_index, fib_forward_chain_type_t ct, const fib_route_path_t *rpaths); extern void ip_punt_redirect_del (fib_protocol_t fproto, u32 rx_sw_if_index); extern index_t ip_punt_redirect_find (fib_protocol_t fproto, u32 rx_sw_if_index); extern u8 *format_ip_punt_redirect (u8 * s, va_list * args); extern u8 *format_ip_punt_redirect_trace (u8 * s, va_list * args); typedef walk_rc_t (*ip_punt_redirect_walk_cb_t) (u32 rx_sw_if_index, const ip_punt_redirect_rx_t * redirect, void *arg); extern void ip_punt_redirect_walk (fib_protocol_t fproto, ip_punt_redirect_walk_cb_t cb, void *ctx); static_always_inline ip_punt_redirect_rx_t * ip_punt_redirect_get (index_t rrxi) { return (pool_elt_at_index (ip_punt_redirect_cfg.pool, rrxi)); } always_inline uword ip_punt_redirect (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame, u8 arc_index, fib_protocol_t fproto) { u32 *from, *to_next, n_left_from, n_left_to_next, next_index; vnet_feature_main_t *fm = &feature_main; vnet_feature_config_main_t *cm = &fm->feature_config_mains[arc_index]; index_t *redirects; from = vlib_frame_vector_args (frame); n_left_from = frame->n_vectors; next_index = node->cached_next_index; redirects = ip_punt_redirect_cfg.redirect_by_rx_sw_if_index[fproto]; while (n_left_from > 0) { vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); while (n_left_from > 0 && n_left_to_next > 0) { u32 rx_sw_if_index0, rrxi0; ip_punt_redirect_rx_t *rrx0; vlib_buffer_t *b0; u32 next0; u32 bi0; rrxi0 = INDEX_INVALID; next0 = 0; bi0 = to_next[0] = from[0]; from += 1; n_left_from -= 1; to_next += 1; n_left_to_next -= 1; b0 = vlib_get_buffer (vm, bi0); vnet_get_config_data (&cm->config_main, &b0->current_config_index, &next0, 0); rx_sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX]; /* * If config exists for this particular RX interface use it, * else use the default (at RX = 0) */ if (vec_len (redirects) > rx_sw_if_index0) { rrxi0 = redirects[rx_sw_if_index0]; if (INDEX_INVALID == rrxi0) rrxi0 = redirects[0]; } else if (vec_len (redirects) >= 1) rrxi0 = redirects[0]; if (PREDICT_TRUE (INDEX_INVALID != rrxi0)) { /* prevent ttl decrement on forward */ b0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED; rrx0 = ip_punt_redirect_get (rrxi0); vnet_buffer (b0)->ip.adj_index[VLIB_TX] = rrx0->dpo.dpoi_index; next0 = rrx0->dpo.dpoi_next_node; } if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED)) { ip_punt_redirect_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t)); t->next = next0; t->rrxi = rrxi0; } 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 uword ip_drop_or_punt (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame, u8 arc_index) { u32 *from, *to_next, n_left_from, n_left_to_next, next_index; from = vlib_frame_vector_args (frame); n_left_from = frame->n_vectors; next_index = node->cached_next_index; while (n_left_from > 0) { vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); while (n_left_from >= 8 && n_left_to_next >= 4) { vlib_buffer_t *b0, *b1, *b2, *b3; u32 next0, next1, next2, next3; u32 bi0, bi1, bi2, bi3; next0 = next1 = next2 = next3 = 0; /* Prefetch next iteration. */ { vlib_buffer_t *p4, *p5, *p6, *p7; p4 = vlib_get_buffer (vm, from[4]); p5 = vlib_get_buffer (vm, from[5]); p6 = vlib_get_buffer (vm, from[6]); p7 = vlib_get_buffer (vm, from[7]); vlib_prefetch_buffer_header (p4, LOAD); vlib_prefetch_buffer_header (p5, LOAD); vlib_prefetch_buffer_header (p6, LOAD); vlib_prefetch_buffer_header (p7, LOAD); } bi0 = to_next[0] = from[0]; bi1 = to_next[1] = from[1]; bi2 = to_next[2] = from[2]; bi3 = to_next[3] = from[3]; from += 4; n_left_from -= 4; to_next += 4; n_left_to_next -= 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); /* punt and drop features are not associated with a given interface * so the special index 0 is used */ vnet_feature_arc_start (arc_index, 0, &next0, b0); vnet_feature_arc_start (arc_index, 0, &next1, b1); vnet_feature_arc_start (arc_index, 0, &next2, b2); vnet_feature_arc_start (arc_index, 0, &next3, b3); vlib_validate_buffer_enqueue_x4 (vm, node, next_index, to_next, n_left_to_next, bi0, bi1, bi2, bi3, next0, next1, next2, next3); } while (n_left_from > 0 && n_left_to_next > 0) { vlib_buffer_t *b0; u32 next0; u32 bi0; next0 = 0; bi0 = to_next[0] = from[0]; from += 1; n_left_from -= 1; to_next += 1; n_left_to_next -= 1; b0 = vlib_get_buffer (vm, bi0); vnet_feature_arc_start (arc_index, 0, &next0, b0); 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; } #endif /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */