2 * Copyright (c) 2015 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
16 #ifndef __IP_PUNT_DROP_H__
17 #define __IP_PUNT_DROP_H__
19 #include <vnet/ip/ip.h>
20 #include <vnet/policer/policer.h>
21 #include <vnet/policer/police_inlines.h>
24 * IP4 punt policer configuration
25 * we police the punt rate to prevent overloading the host
27 typedef struct ip_punt_policer_t_
32 typedef enum ip_punt_policer_next_t_
34 IP_PUNT_POLICER_NEXT_DROP,
35 IP_PUNT_POLICER_N_NEXT,
36 } ip_punt_policer_next_t;
38 typedef struct ip_punt_policer_trace_t_
42 } ip_punt_policer_trace_t;
44 #define foreach_ip_punt_policer_error \
45 _(DROP, "ip punt policer drop")
49 #define _(sym,str) IP_PUNT_POLICER_ERROR_##sym,
50 foreach_ip_punt_policer_error
52 IP4_PUNT_POLICER_N_ERROR,
53 } ip_punt_policer_error_t;
55 extern u8 *format_ip_punt_policer_trace (u8 * s, va_list * args);
58 * IP punt policing node function
61 ip_punt_policer (vlib_main_t * vm,
62 vlib_node_runtime_t * node,
63 vlib_frame_t * frame, u8 arc_index, u32 policer_index)
65 u32 *from, *to_next, n_left_from, n_left_to_next, next_index;
66 u64 time_in_policer_periods;
67 vnet_feature_main_t *fm = &feature_main;
68 vnet_feature_config_main_t *cm = &fm->feature_config_mains[arc_index];
70 time_in_policer_periods =
71 clib_cpu_time_now () >> POLICER_TICKS_PER_PERIOD_SHIFT;
73 from = vlib_frame_vector_args (frame);
74 n_left_from = frame->n_vectors;
75 next_index = node->cached_next_index;
77 while (n_left_from > 0)
79 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
81 while (n_left_from >= 4 && n_left_to_next >= 2)
83 vlib_buffer_t *b0, *b1;
89 bi0 = to_next[0] = from[0];
90 bi1 = to_next[1] = from[1];
97 b0 = vlib_get_buffer (vm, bi0);
98 b1 = vlib_get_buffer (vm, bi1);
100 vnet_get_config_data (&cm->config_main,
101 &b0->current_config_index, &next0, 0);
102 vnet_get_config_data (&cm->config_main,
103 &b1->current_config_index, &next1, 0);
105 act0 = vnet_policer_police (vm, b0,
107 time_in_policer_periods,
109 act1 = vnet_policer_police (vm, b1,
111 time_in_policer_periods,
114 if (PREDICT_FALSE (act0 == SSE2_QOS_ACTION_DROP))
116 next0 = IP_PUNT_POLICER_NEXT_DROP;
117 b0->error = node->errors[IP_PUNT_POLICER_ERROR_DROP];
119 if (PREDICT_FALSE (act1 == SSE2_QOS_ACTION_DROP))
121 next1 = IP_PUNT_POLICER_NEXT_DROP;
122 b1->error = node->errors[IP_PUNT_POLICER_ERROR_DROP];
125 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
127 ip_punt_policer_trace_t *t =
128 vlib_add_trace (vm, node, b0, sizeof (*t));
130 t->policer_index = policer_index;
132 if (PREDICT_FALSE (b1->flags & VLIB_BUFFER_IS_TRACED))
134 ip_punt_policer_trace_t *t =
135 vlib_add_trace (vm, node, b1, sizeof (*t));
137 t->policer_index = policer_index;
139 vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
141 bi0, bi1, next0, next1);
143 while (n_left_from > 0 && n_left_to_next > 0)
151 bi0 = to_next[0] = from[0];
158 b0 = vlib_get_buffer (vm, bi0);
160 vnet_get_config_data (&cm->config_main,
161 &b0->current_config_index, &next0, 0);
163 act0 = vnet_policer_police (vm, b0,
165 time_in_policer_periods,
167 if (PREDICT_FALSE (act0 == SSE2_QOS_ACTION_DROP))
169 next0 = IP_PUNT_POLICER_NEXT_DROP;
170 b0->error = node->errors[IP_PUNT_POLICER_ERROR_DROP];
173 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
175 ip_punt_policer_trace_t *t =
176 vlib_add_trace (vm, node, b0, sizeof (*t));
178 t->policer_index = policer_index;
181 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
182 n_left_to_next, bi0, next0);
184 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
187 return frame->n_vectors;
191 * IP4 punt redirect per-rx interface configuration
192 * redirect punted traffic to another location.
194 typedef struct ip_punt_redirect_rx_t_
197 * Node linkage into the FIB graph
201 fib_protocol_t fproto;
202 fib_forward_chain_type_t payload_type;
207 * redirect forwarding
210 } ip_punt_redirect_rx_t;
213 * IP punt redirect configuration
215 typedef struct ip_punt_redirect_t_
217 ip_punt_redirect_rx_t *pool;
220 * per-RX interface configuration.
221 * sw_if_index = 0 (from which packets are never received) is used to
222 * indicate 'from-any'
224 index_t *redirect_by_rx_sw_if_index[FIB_PROTOCOL_IP_MAX];
225 } ip_punt_redirect_cfg_t;
227 extern ip_punt_redirect_cfg_t ip_punt_redirect_cfg;
230 * IP punt redirect next nodes
232 typedef enum ip_punt_redirect_next_t_
234 IP_PUNT_REDIRECT_NEXT_DROP,
235 IP_PUNT_REDIRECT_NEXT_TX,
236 IP_PUNT_REDIRECT_NEXT_ARP,
237 IP_PUNT_REDIRECT_N_NEXT,
238 } ip_punt_redirect_next_t;
241 * IP Punt redirect trace
243 typedef struct ip4_punt_redirect_trace_t_
247 } ip_punt_redirect_trace_t;
250 * Add a punt redirect entry
252 extern void ip_punt_redirect_add (fib_protocol_t fproto,
254 fib_forward_chain_type_t ct,
255 fib_route_path_t * rpaths);
257 extern void ip_punt_redirect_del (fib_protocol_t fproto, u32 rx_sw_if_index);
258 extern index_t ip_punt_redirect_find (fib_protocol_t fproto,
260 extern u8 *format_ip_punt_redirect (u8 * s, va_list * args);
262 extern u8 *format_ip_punt_redirect_trace (u8 * s, va_list * args);
264 typedef walk_rc_t (*ip_punt_redirect_walk_cb_t) (u32 rx_sw_if_index,
265 const ip_punt_redirect_rx_t *
266 redirect, void *arg);
267 extern void ip_punt_redirect_walk (fib_protocol_t fproto,
268 ip_punt_redirect_walk_cb_t cb, void *ctx);
270 static_always_inline ip_punt_redirect_rx_t *
271 ip_punt_redirect_get (index_t rrxi)
273 return (pool_elt_at_index (ip_punt_redirect_cfg.pool, rrxi));
277 ip_punt_redirect (vlib_main_t * vm,
278 vlib_node_runtime_t * node,
279 vlib_frame_t * frame, u8 arc_index, fib_protocol_t fproto)
281 u32 *from, *to_next, n_left_from, n_left_to_next, next_index;
282 vnet_feature_main_t *fm = &feature_main;
283 vnet_feature_config_main_t *cm = &fm->feature_config_mains[arc_index];
286 from = vlib_frame_vector_args (frame);
287 n_left_from = frame->n_vectors;
288 next_index = node->cached_next_index;
289 redirects = ip_punt_redirect_cfg.redirect_by_rx_sw_if_index[fproto];
291 while (n_left_from > 0)
293 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
295 while (n_left_from > 0 && n_left_to_next > 0)
297 u32 rx_sw_if_index0, rrxi0;
298 ip_punt_redirect_rx_t *rrx0;
303 rrxi0 = INDEX_INVALID;
305 bi0 = to_next[0] = from[0];
312 b0 = vlib_get_buffer (vm, bi0);
314 vnet_get_config_data (&cm->config_main,
315 &b0->current_config_index, &next0, 0);
317 rx_sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
320 * If config exists for this particular RX interface use it,
321 * else use the default (at RX = 0)
323 if (vec_len (redirects) > rx_sw_if_index0)
325 rrxi0 = redirects[rx_sw_if_index0];
326 if (INDEX_INVALID == rrxi0)
327 rrxi0 = redirects[0];
329 else if (vec_len (redirects) >= 1)
330 rrxi0 = redirects[0];
332 if (PREDICT_TRUE (INDEX_INVALID != rrxi0))
334 rrx0 = ip_punt_redirect_get (rrxi0);
335 vnet_buffer (b0)->ip.adj_index[VLIB_TX] = rrx0->dpo.dpoi_index;
336 next0 = rrx0->dpo.dpoi_next_node;
339 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
341 ip_punt_redirect_trace_t *t =
342 vlib_add_trace (vm, node, b0, sizeof (*t));
347 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
348 n_left_to_next, bi0, next0);
351 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
354 return frame->n_vectors;
358 ip_drop_or_punt (vlib_main_t * vm,
359 vlib_node_runtime_t * node,
360 vlib_frame_t * frame, u8 arc_index)
362 u32 *from, *to_next, n_left_from, n_left_to_next, next_index;
364 from = vlib_frame_vector_args (frame);
365 n_left_from = frame->n_vectors;
366 next_index = node->cached_next_index;
368 while (n_left_from > 0)
370 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
372 while (n_left_from >= 8 && n_left_to_next >= 4)
374 vlib_buffer_t *b0, *b1, *b2, *b3;
375 u32 next0, next1, next2, next3;
376 u32 bi0, bi1, bi2, bi3;
378 next0 = next1 = next2 = next3 = 0;
380 /* Prefetch next iteration. */
382 vlib_buffer_t *p4, *p5, *p6, *p7;
384 p4 = vlib_get_buffer (vm, from[4]);
385 p5 = vlib_get_buffer (vm, from[5]);
386 p6 = vlib_get_buffer (vm, from[6]);
387 p7 = vlib_get_buffer (vm, from[7]);
389 vlib_prefetch_buffer_header (p4, LOAD);
390 vlib_prefetch_buffer_header (p5, LOAD);
391 vlib_prefetch_buffer_header (p6, LOAD);
392 vlib_prefetch_buffer_header (p7, LOAD);
395 bi0 = to_next[0] = from[0];
396 bi1 = to_next[1] = from[1];
397 bi2 = to_next[2] = from[2];
398 bi3 = to_next[3] = from[3];
405 b0 = vlib_get_buffer (vm, bi0);
406 b1 = vlib_get_buffer (vm, bi1);
407 b2 = vlib_get_buffer (vm, bi2);
408 b3 = vlib_get_buffer (vm, bi3);
410 /* punt and drop features are not associated with a given interface
411 * so the special index 0 is used */
412 vnet_feature_arc_start (arc_index, 0, &next0, b0);
413 vnet_feature_arc_start (arc_index, 0, &next1, b1);
414 vnet_feature_arc_start (arc_index, 0, &next2, b2);
415 vnet_feature_arc_start (arc_index, 0, &next3, b3);
417 vlib_validate_buffer_enqueue_x4 (vm, node, next_index,
418 to_next, n_left_to_next,
420 next0, next1, next2, next3);
423 while (n_left_from > 0 && n_left_to_next > 0)
430 bi0 = to_next[0] = from[0];
437 b0 = vlib_get_buffer (vm, bi0);
439 vnet_feature_arc_start (arc_index, 0, &next0, b0);
441 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
442 n_left_to_next, bi0, next0);
444 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
447 return frame->n_vectors;
453 * fd.io coding-style-patch-verification: ON
456 * eval: (c-set-style "gnu")