2 * Copyright (c) 2018 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 #include <vnet/dpo/dvr_dpo.h>
17 #include <vnet/dpo/drop_dpo.h>
18 #include <vnet/vxlan-gbp/vxlan_gbp_packet.h>
19 #include <vnet/vxlan-gbp/vxlan_gbp.h>
21 #include <plugins/gbp/gbp.h>
22 #include <plugins/gbp/gbp_policy_dpo.h>
23 #include <plugins/gbp/gbp_recirc.h>
25 #ifndef CLIB_MARCH_VARIANT
29 gbp_policy_dpo_t *gbp_policy_dpo_pool;
32 * DPO type registered for these GBP FWD
34 dpo_type_t gbp_policy_dpo_type;
36 static gbp_policy_dpo_t *
37 gbp_policy_dpo_alloc (void)
39 gbp_policy_dpo_t *gpd;
41 pool_get_aligned_zero (gbp_policy_dpo_pool, gpd, CLIB_CACHE_LINE_BYTES);
46 static inline gbp_policy_dpo_t *
47 gbp_policy_dpo_get_from_dpo (const dpo_id_t * dpo)
49 ASSERT (gbp_policy_dpo_type == dpo->dpoi_type);
51 return (gbp_policy_dpo_get (dpo->dpoi_index));
55 gbp_policy_dpo_get_index (gbp_policy_dpo_t * gpd)
57 return (gpd - gbp_policy_dpo_pool);
61 gbp_policy_dpo_lock (dpo_id_t * dpo)
63 gbp_policy_dpo_t *gpd;
65 gpd = gbp_policy_dpo_get_from_dpo (dpo);
70 gbp_policy_dpo_unlock (dpo_id_t * dpo)
72 gbp_policy_dpo_t *gpd;
74 gpd = gbp_policy_dpo_get_from_dpo (dpo);
77 if (0 == gpd->gpd_locks)
79 dpo_reset (&gpd->gpd_dpo);
80 pool_put (gbp_policy_dpo_pool, gpd);
85 gbp_policy_dpo_get_urpf (const dpo_id_t * dpo)
87 gbp_policy_dpo_t *gpd;
89 gpd = gbp_policy_dpo_get_from_dpo (dpo);
91 return (gpd->gpd_sw_if_index);
95 gbp_policy_dpo_add_or_lock (dpo_proto_t dproto,
96 sclass_t sclass, u32 sw_if_index, dpo_id_t * dpo)
98 gbp_policy_dpo_t *gpd;
99 dpo_id_t parent = DPO_INVALID;
101 gpd = gbp_policy_dpo_alloc ();
103 gpd->gpd_proto = dproto;
104 gpd->gpd_sw_if_index = sw_if_index;
105 gpd->gpd_sclass = sclass;
107 if (~0 != sw_if_index)
110 * stack on the DVR DPO for the output interface
112 dvr_dpo_add_or_lock (sw_if_index, dproto, &parent);
116 dpo_copy (&parent, drop_dpo_get (dproto));
119 dpo_stack (gbp_policy_dpo_type, dproto, &gpd->gpd_dpo, &parent);
120 dpo_set (dpo, gbp_policy_dpo_type, dproto, gbp_policy_dpo_get_index (gpd));
124 format_gbp_policy_dpo (u8 * s, va_list * ap)
126 index_t index = va_arg (*ap, index_t);
127 u32 indent = va_arg (*ap, u32);
128 gbp_policy_dpo_t *gpd = gbp_policy_dpo_get (index);
129 vnet_main_t *vnm = vnet_get_main ();
131 s = format (s, "gbp-policy-dpo: %U, sclass:%d out:%U",
132 format_dpo_proto, gpd->gpd_proto,
133 (int) gpd->gpd_sclass,
134 format_vnet_sw_if_index_name, vnm, gpd->gpd_sw_if_index);
135 s = format (s, "\n%U", format_white_space, indent + 2);
136 s = format (s, "%U", format_dpo_id, &gpd->gpd_dpo, indent + 4);
142 * Interpose a policy DPO
145 gbp_policy_dpo_interpose (const dpo_id_t * original,
146 const dpo_id_t * parent, dpo_id_t * clone)
148 gbp_policy_dpo_t *gpd, *gpd_clone;
150 gpd_clone = gbp_policy_dpo_alloc ();
151 gpd = gbp_policy_dpo_get (original->dpoi_index);
153 gpd_clone->gpd_proto = gpd->gpd_proto;
154 gpd_clone->gpd_sclass = gpd->gpd_sclass;
155 gpd_clone->gpd_sw_if_index = gpd->gpd_sw_if_index;
158 * if no interface is provided, grab one from the parent
161 if (~0 == gpd_clone->gpd_sw_if_index)
162 gpd_clone->gpd_sw_if_index = dpo_get_urpf (parent);
164 dpo_stack (gbp_policy_dpo_type,
165 gpd_clone->gpd_proto, &gpd_clone->gpd_dpo, parent);
169 gpd_clone->gpd_proto, gbp_policy_dpo_get_index (gpd_clone));
172 const static dpo_vft_t gbp_policy_dpo_vft = {
173 .dv_lock = gbp_policy_dpo_lock,
174 .dv_unlock = gbp_policy_dpo_unlock,
175 .dv_format = format_gbp_policy_dpo,
176 .dv_get_urpf = gbp_policy_dpo_get_urpf,
177 .dv_mk_interpose = gbp_policy_dpo_interpose,
181 * @brief The per-protocol VLIB graph nodes that are assigned to a glean
184 * this means that these graph nodes are ones from which a glean is the
185 * parent object in the DPO-graph.
187 const static char *const gbp_policy_dpo_ip4_nodes[] = {
188 "ip4-gbp-policy-dpo",
192 const static char *const gbp_policy_dpo_ip6_nodes[] = {
193 "ip6-gbp-policy-dpo",
197 const static char *const *const gbp_policy_dpo_nodes[DPO_PROTO_NUM] = {
198 [DPO_PROTO_IP4] = gbp_policy_dpo_ip4_nodes,
199 [DPO_PROTO_IP6] = gbp_policy_dpo_ip6_nodes,
203 gbp_policy_dpo_get_type (void)
205 return (gbp_policy_dpo_type);
208 static clib_error_t *
209 gbp_policy_dpo_module_init (vlib_main_t * vm)
211 gbp_policy_dpo_type = dpo_register_new_type (&gbp_policy_dpo_vft,
212 gbp_policy_dpo_nodes);
217 VLIB_INIT_FUNCTION (gbp_policy_dpo_module_init);
218 #endif /* CLIB_MARCH_VARIANT */
222 #define _(sym,str) GBP_POLICY_DPO_ERROR_##sym,
223 foreach_gbp_policy_error
226 } gbp_policy_dpo_error_t;
228 static char *gbp_policy_dpo_error_strings[] = {
229 #define _(sym,string) string,
230 foreach_gbp_policy_error
234 typedef struct gbp_policy_dpo_trace_t_
241 } gbp_policy_dpo_trace_t;
250 gbp_rule_l3_redirect (const gbp_rule_t * gu, vlib_buffer_t * b0, int is_ip6)
252 gbp_policy_node_t pnode;
256 pnode = (is_ip6 ? GBP_POLICY_NODE_IP6 : GBP_POLICY_NODE_IP4);
257 dproto = (is_ip6 ? DPO_PROTO_IP6 : DPO_PROTO_IP4);
258 dpo = &gu->gu_dpo[pnode][dproto];
260 /* The flow hash is still valid as this is a IP packet being switched */
261 vnet_buffer (b0)->ip.adj_index[VLIB_TX] = dpo->dpoi_index;
263 return (dpo->dpoi_next_node);
267 gbp_policy_dpo_inline (vlib_main_t * vm,
268 vlib_node_runtime_t * node,
269 vlib_frame_t * from_frame, u8 is_ip6)
271 gbp_main_t *gm = &gbp_main;
272 u32 n_left_from, next_index, *from, *to_next, thread_index;
273 u32 n_allow_intra, n_allow_a_bit, n_allow_sclass_1;
276 from = vlib_frame_vector_args (from_frame);
277 n_left_from = from_frame->n_vectors;
278 n_allow_intra = n_allow_a_bit = n_allow_sclass_1 = 0;
279 thread_index = vm->thread_index;
281 next_index = node->cached_next_index;
283 while (n_left_from > 0)
287 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
289 while (n_left_from > 0 && n_left_to_next > 0)
291 const gbp_policy_dpo_t *gpd0;
293 gbp_contract_key_t key0;
306 next0 = GBP_POLICY_DROP;
308 b0 = vlib_get_buffer (vm, bi0);
311 gpd0 = gbp_policy_dpo_get (vnet_buffer (b0)->ip.adj_index[VLIB_TX]);
312 vnet_buffer (b0)->ip.adj_index[VLIB_TX] = gpd0->gpd_dpo.dpoi_index;
315 * Reflection check; in and out on an ivxlan tunnel
317 if ((~0 != vxlan_gbp_tunnel_by_sw_if_index (gpd0->gpd_sw_if_index))
318 && (vnet_buffer2 (b0)->gbp.flags & VXLAN_GBP_GPFLAGS_R))
323 if (vnet_buffer2 (b0)->gbp.flags & VXLAN_GBP_GPFLAGS_A)
325 next0 = gpd0->gpd_dpo.dpoi_next_node;
331 key0.gck_src = vnet_buffer2 (b0)->gbp.sclass;
332 key0.gck_dst = gpd0->gpd_sclass;
334 if (SCLASS_INVALID != key0.gck_src)
336 if (PREDICT_FALSE (key0.gck_src == key0.gck_dst))
341 next0 = gpd0->gpd_dpo.dpoi_next_node;
342 vnet_buffer2 (b0)->gbp.flags |= VXLAN_GBP_GPFLAGS_A;
346 else if (PREDICT_FALSE (key0.gck_src == 1 || key0.gck_dst == 1))
349 * sclass or dclass 1 allowed
351 next0 = gpd0->gpd_dpo.dpoi_next_node;
352 vnet_buffer2 (b0)->gbp.flags |= VXLAN_GBP_GPFLAGS_A;
358 gci0 = gbp_contract_find (&key0);
360 if (INDEX_INVALID != gci0)
362 fa_5tuple_opaque_t pkt_5tuple0;
363 u32 acl_pos_p0, acl_match_p0;
364 u32 rule_match_p0, trace_bitmap0;
366 * tests against the ACL
368 gc0 = gbp_contract_get (gci0);
369 acl_plugin_fill_5tuple_inline (gm->
370 acl_plugin.p_acl_main,
371 gc0->gc_lc_index, b0,
376 acl_plugin_match_5tuple_inline (gm->
377 acl_plugin.p_acl_main,
379 &pkt_5tuple0, is_ip6,
380 &action0, &acl_pos_p0,
387 vnet_buffer2 (b0)->gbp.flags |= VXLAN_GBP_GPFLAGS_A;
388 gu = gbp_rule_get (gc0->gc_rules[rule_match_p0]);
389 action0 = gu->gu_action;
391 switch (gu->gu_action)
393 case GBP_RULE_PERMIT:
394 next0 = gpd0->gpd_dpo.dpoi_next_node;
397 next0 = GBP_POLICY_DROP;
399 case GBP_RULE_REDIRECT:
400 next0 = gbp_rule_l3_redirect (gu, b0, is_ip6);
404 if (next0 == GBP_POLICY_DROP)
406 vlib_increment_combined_counter
407 (&gbp_contract_drop_counters,
409 gci0, 1, vlib_buffer_length_in_chain (vm, b0));
411 node->errors[GBP_POLICY_DPO_ERROR_DROP_CONTRACT];
415 vlib_increment_combined_counter
416 (&gbp_contract_permit_counters,
418 gci0, 1, vlib_buffer_length_in_chain (vm, b0));
425 node->errors[GBP_POLICY_DPO_ERROR_DROP_NO_CONTRACT];
432 * the src EPG is not set when the packet arrives on an EPG
433 * uplink interface and we do not need to apply policy
435 next0 = gpd0->gpd_dpo.dpoi_next_node;
438 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
440 gbp_policy_dpo_trace_t *tr;
442 tr = vlib_add_trace (vm, node, b0, sizeof (*tr));
443 tr->sclass = key0.gck_src;
444 tr->dclass = key0.gck_dst;
445 tr->acl_index = (gc0 ? gc0->gc_acl_index : ~0);
446 tr->flags = vnet_buffer2 (b0)->gbp.flags;
447 tr->action = action0;
450 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
451 n_left_to_next, bi0, next0);
453 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
456 vlib_node_increment_counter (vm, node->node_index,
457 GBP_POLICY_DPO_ERROR_ALLOW_INTRA,
459 vlib_node_increment_counter (vm, node->node_index,
460 GBP_POLICY_DPO_ERROR_ALLOW_A_BIT,
462 vlib_node_increment_counter (vm, node->node_index,
463 GBP_POLICY_DPO_ERROR_ALLOW_SCLASS_1,
465 return from_frame->n_vectors;
469 format_gbp_policy_dpo_trace (u8 * s, va_list * args)
471 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
472 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
473 gbp_policy_dpo_trace_t *t = va_arg (*args, gbp_policy_dpo_trace_t *);
475 s = format (s, " sclass:%d dclass:%d acl-index:%d flags:%U action:%d",
476 t->sclass, t->dclass, t->acl_index,
477 format_vxlan_gbp_header_gpflags, t->flags, t->action);
482 VLIB_NODE_FN (ip4_gbp_policy_dpo_node) (vlib_main_t * vm,
483 vlib_node_runtime_t * node,
484 vlib_frame_t * from_frame)
486 return (gbp_policy_dpo_inline (vm, node, from_frame, 0));
489 VLIB_NODE_FN (ip6_gbp_policy_dpo_node) (vlib_main_t * vm,
490 vlib_node_runtime_t * node,
491 vlib_frame_t * from_frame)
493 return (gbp_policy_dpo_inline (vm, node, from_frame, 1));
497 VLIB_REGISTER_NODE (ip4_gbp_policy_dpo_node) = {
498 .name = "ip4-gbp-policy-dpo",
499 .vector_size = sizeof (u32),
500 .format_trace = format_gbp_policy_dpo_trace,
502 .n_errors = ARRAY_LEN(gbp_policy_dpo_error_strings),
503 .error_strings = gbp_policy_dpo_error_strings,
505 .n_next_nodes = GBP_POLICY_N_NEXT,
508 [GBP_POLICY_DROP] = "ip4-drop",
511 VLIB_REGISTER_NODE (ip6_gbp_policy_dpo_node) = {
512 .name = "ip6-gbp-policy-dpo",
513 .vector_size = sizeof (u32),
514 .format_trace = format_gbp_policy_dpo_trace,
516 .n_errors = ARRAY_LEN(gbp_policy_dpo_error_strings),
517 .error_strings = gbp_policy_dpo_error_strings,
519 .n_next_nodes = GBP_POLICY_N_NEXT,
522 [GBP_POLICY_DROP] = "ip6-drop",
528 * fd.io coding-style-patch-verification: ON
531 * eval: (c-set-style "gnu")