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,
97 sclass_t sclass, u32 sw_if_index, dpo_id_t * dpo)
99 gbp_policy_dpo_t *gpd;
100 dpo_id_t parent = DPO_INVALID;
102 gpd = gbp_policy_dpo_alloc ();
104 gpd->gpd_proto = dproto;
105 gpd->gpd_sw_if_index = sw_if_index;
106 gpd->gpd_sclass = sclass;
107 gpd->gpd_scope = scope;
109 if (~0 != sw_if_index)
112 * stack on the DVR DPO for the output interface
114 dvr_dpo_add_or_lock (sw_if_index, dproto, &parent);
118 dpo_copy (&parent, drop_dpo_get (dproto));
121 dpo_stack (gbp_policy_dpo_type, dproto, &gpd->gpd_dpo, &parent);
122 dpo_set (dpo, gbp_policy_dpo_type, dproto, gbp_policy_dpo_get_index (gpd));
126 format_gbp_policy_dpo (u8 * s, va_list * ap)
128 index_t index = va_arg (*ap, index_t);
129 u32 indent = va_arg (*ap, u32);
130 gbp_policy_dpo_t *gpd = gbp_policy_dpo_get (index);
131 vnet_main_t *vnm = vnet_get_main ();
133 s = format (s, "gbp-policy-dpo: %U, scope:%d sclass:%d out:%U",
134 format_dpo_proto, gpd->gpd_proto,
135 gpd->gpd_scope, (int) gpd->gpd_sclass,
136 format_vnet_sw_if_index_name, vnm, gpd->gpd_sw_if_index);
137 s = format (s, "\n%U", format_white_space, indent + 2);
138 s = format (s, "%U", format_dpo_id, &gpd->gpd_dpo, indent + 4);
144 * Interpose a policy DPO
147 gbp_policy_dpo_interpose (const dpo_id_t * original,
148 const dpo_id_t * parent, dpo_id_t * clone)
150 gbp_policy_dpo_t *gpd, *gpd_clone;
152 gpd_clone = gbp_policy_dpo_alloc ();
153 gpd = gbp_policy_dpo_get (original->dpoi_index);
155 gpd_clone->gpd_proto = gpd->gpd_proto;
156 gpd_clone->gpd_scope = gpd->gpd_scope;
157 gpd_clone->gpd_sclass = gpd->gpd_sclass;
158 gpd_clone->gpd_sw_if_index = gpd->gpd_sw_if_index;
161 * if no interface is provided, grab one from the parent
164 if (~0 == gpd_clone->gpd_sw_if_index)
165 gpd_clone->gpd_sw_if_index = dpo_get_urpf (parent);
167 dpo_stack (gbp_policy_dpo_type,
168 gpd_clone->gpd_proto, &gpd_clone->gpd_dpo, parent);
172 gpd_clone->gpd_proto, gbp_policy_dpo_get_index (gpd_clone));
175 const static dpo_vft_t gbp_policy_dpo_vft = {
176 .dv_lock = gbp_policy_dpo_lock,
177 .dv_unlock = gbp_policy_dpo_unlock,
178 .dv_format = format_gbp_policy_dpo,
179 .dv_get_urpf = gbp_policy_dpo_get_urpf,
180 .dv_mk_interpose = gbp_policy_dpo_interpose,
184 * @brief The per-protocol VLIB graph nodes that are assigned to a glean
187 * this means that these graph nodes are ones from which a glean is the
188 * parent object in the DPO-graph.
190 const static char *const gbp_policy_dpo_ip4_nodes[] = {
191 "ip4-gbp-policy-dpo",
195 const static char *const gbp_policy_dpo_ip6_nodes[] = {
196 "ip6-gbp-policy-dpo",
200 const static char *const *const gbp_policy_dpo_nodes[DPO_PROTO_NUM] = {
201 [DPO_PROTO_IP4] = gbp_policy_dpo_ip4_nodes,
202 [DPO_PROTO_IP6] = gbp_policy_dpo_ip6_nodes,
206 gbp_policy_dpo_get_type (void)
208 return (gbp_policy_dpo_type);
211 static clib_error_t *
212 gbp_policy_dpo_module_init (vlib_main_t * vm)
214 gbp_policy_dpo_type = dpo_register_new_type (&gbp_policy_dpo_vft,
215 gbp_policy_dpo_nodes);
220 VLIB_INIT_FUNCTION (gbp_policy_dpo_module_init);
221 #endif /* CLIB_MARCH_VARIANT */
225 #define _(sym,str) GBP_POLICY_DPO_ERROR_##sym,
226 foreach_gbp_policy_error
229 } gbp_policy_dpo_error_t;
231 static char *gbp_policy_dpo_error_strings[] = {
232 #define _(sym,string) string,
233 foreach_gbp_policy_error
237 typedef struct gbp_policy_dpo_trace_t_
246 } gbp_policy_dpo_trace_t;
255 gbp_rule_l3_redirect (const gbp_rule_t * gu, vlib_buffer_t * b0, int is_ip6)
257 gbp_policy_node_t pnode;
261 pnode = (is_ip6 ? GBP_POLICY_NODE_IP6 : GBP_POLICY_NODE_IP4);
262 dproto = (is_ip6 ? DPO_PROTO_IP6 : DPO_PROTO_IP4);
263 dpo = &gu->gu_dpo[pnode][dproto];
265 /* The flow hash is still valid as this is a IP packet being switched */
266 vnet_buffer (b0)->ip.adj_index[VLIB_TX] = dpo->dpoi_index;
268 return (dpo->dpoi_next_node);
272 gbp_policy_dpo_inline (vlib_main_t * vm,
273 vlib_node_runtime_t * node,
274 vlib_frame_t * from_frame, u8 is_ip6)
276 gbp_main_t *gm = &gbp_main;
277 u32 n_left_from, next_index, *from, *to_next, thread_index;
278 u32 n_allow_intra, n_allow_a_bit, n_allow_sclass_1;
281 from = vlib_frame_vector_args (from_frame);
282 n_left_from = from_frame->n_vectors;
283 n_allow_intra = n_allow_a_bit = n_allow_sclass_1 = 0;
284 thread_index = vm->thread_index;
286 next_index = node->cached_next_index;
288 while (n_left_from > 0)
292 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
294 while (n_left_from > 0 && n_left_to_next > 0)
296 const gbp_policy_dpo_t *gpd0;
298 gbp_contract_key_t key0;
311 next0 = GBP_POLICY_DROP;
313 b0 = vlib_get_buffer (vm, bi0);
316 gpd0 = gbp_policy_dpo_get (vnet_buffer (b0)->ip.adj_index[VLIB_TX]);
317 vnet_buffer (b0)->ip.adj_index[VLIB_TX] = gpd0->gpd_dpo.dpoi_index;
320 * Reflection check; in and out on an ivxlan tunnel
322 if ((~0 != vxlan_gbp_tunnel_by_sw_if_index (gpd0->gpd_sw_if_index))
323 && (vnet_buffer2 (b0)->gbp.flags & VXLAN_GBP_GPFLAGS_R))
328 if (vnet_buffer2 (b0)->gbp.flags & VXLAN_GBP_GPFLAGS_A)
330 next0 = gpd0->gpd_dpo.dpoi_next_node;
337 key0.gck_scope = gpd0->gpd_scope;
338 key0.gck_src = vnet_buffer2 (b0)->gbp.sclass;
339 key0.gck_dst = gpd0->gpd_sclass;
341 if (SCLASS_INVALID != key0.gck_src)
343 if (PREDICT_FALSE (key0.gck_src == key0.gck_dst))
348 next0 = gpd0->gpd_dpo.dpoi_next_node;
349 vnet_buffer2 (b0)->gbp.flags |= VXLAN_GBP_GPFLAGS_A;
353 else if (PREDICT_FALSE (key0.gck_src == 1 || key0.gck_dst == 1))
356 * sclass or dclass 1 allowed
358 next0 = gpd0->gpd_dpo.dpoi_next_node;
359 vnet_buffer2 (b0)->gbp.flags |= VXLAN_GBP_GPFLAGS_A;
365 gci0 = gbp_contract_find (&key0);
367 if (INDEX_INVALID != gci0)
369 fa_5tuple_opaque_t pkt_5tuple0;
370 u32 acl_pos_p0, acl_match_p0;
371 u32 rule_match_p0, trace_bitmap0;
373 * tests against the ACL
375 gc0 = gbp_contract_get (gci0);
376 acl_plugin_fill_5tuple_inline (gm->
377 acl_plugin.p_acl_main,
378 gc0->gc_lc_index, b0,
383 acl_plugin_match_5tuple_inline (gm->
384 acl_plugin.p_acl_main,
386 &pkt_5tuple0, is_ip6,
387 &action0, &acl_pos_p0,
394 vnet_buffer2 (b0)->gbp.flags |= VXLAN_GBP_GPFLAGS_A;
395 gu = gbp_rule_get (gc0->gc_rules[rule_match_p0]);
396 action0 = gu->gu_action;
398 switch (gu->gu_action)
400 case GBP_RULE_PERMIT:
401 next0 = gpd0->gpd_dpo.dpoi_next_node;
404 next0 = GBP_POLICY_DROP;
406 case GBP_RULE_REDIRECT:
407 next0 = gbp_rule_l3_redirect (gu, b0, is_ip6);
411 if (next0 == GBP_POLICY_DROP)
413 vlib_increment_combined_counter
414 (&gbp_contract_drop_counters,
416 gci0, 1, vlib_buffer_length_in_chain (vm, b0));
418 node->errors[GBP_POLICY_DPO_ERROR_DROP_CONTRACT];
422 vlib_increment_combined_counter
423 (&gbp_contract_permit_counters,
425 gci0, 1, vlib_buffer_length_in_chain (vm, b0));
432 node->errors[GBP_POLICY_DPO_ERROR_DROP_NO_CONTRACT];
439 * the src EPG is not set when the packet arrives on an EPG
440 * uplink interface and we do not need to apply policy
442 next0 = gpd0->gpd_dpo.dpoi_next_node;
445 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
447 gbp_policy_dpo_trace_t *tr;
449 tr = vlib_add_trace (vm, node, b0, sizeof (*tr));
450 tr->scope = key0.gck_scope;
451 tr->sclass = key0.gck_src;
452 tr->dclass = key0.gck_dst;
453 tr->acl_index = (gc0 ? gc0->gc_acl_index : ~0);
454 tr->flags = vnet_buffer2 (b0)->gbp.flags;
455 tr->action = action0;
456 tr->gci = (gc0 ? gc0 - gbp_contract_pool : INDEX_INVALID);
460 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
461 n_left_to_next, bi0, next0);
463 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
466 vlib_node_increment_counter (vm, node->node_index,
467 GBP_POLICY_DPO_ERROR_ALLOW_INTRA,
469 vlib_node_increment_counter (vm, node->node_index,
470 GBP_POLICY_DPO_ERROR_ALLOW_A_BIT,
472 vlib_node_increment_counter (vm, node->node_index,
473 GBP_POLICY_DPO_ERROR_ALLOW_SCLASS_1,
475 return from_frame->n_vectors;
479 format_gbp_policy_dpo_trace (u8 * s, va_list * args)
481 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
482 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
483 gbp_policy_dpo_trace_t *t = va_arg (*args, gbp_policy_dpo_trace_t *);
487 "scope:%d sclass:%d dclass:%d gci:%d acl-index:%d flags:%U action:%d",
488 t->scope, t->sclass, t->dclass, t->gci, t->acl_index,
489 format_vxlan_gbp_header_gpflags, t->flags, t->action);
494 VLIB_NODE_FN (ip4_gbp_policy_dpo_node) (vlib_main_t * vm,
495 vlib_node_runtime_t * node,
496 vlib_frame_t * from_frame)
498 return (gbp_policy_dpo_inline (vm, node, from_frame, 0));
501 VLIB_NODE_FN (ip6_gbp_policy_dpo_node) (vlib_main_t * vm,
502 vlib_node_runtime_t * node,
503 vlib_frame_t * from_frame)
505 return (gbp_policy_dpo_inline (vm, node, from_frame, 1));
509 VLIB_REGISTER_NODE (ip4_gbp_policy_dpo_node) = {
510 .name = "ip4-gbp-policy-dpo",
511 .vector_size = sizeof (u32),
512 .format_trace = format_gbp_policy_dpo_trace,
514 .n_errors = ARRAY_LEN(gbp_policy_dpo_error_strings),
515 .error_strings = gbp_policy_dpo_error_strings,
517 .n_next_nodes = GBP_POLICY_N_NEXT,
520 [GBP_POLICY_DROP] = "ip4-drop",
523 VLIB_REGISTER_NODE (ip6_gbp_policy_dpo_node) = {
524 .name = "ip6-gbp-policy-dpo",
525 .vector_size = sizeof (u32),
526 .format_trace = format_gbp_policy_dpo_trace,
528 .n_errors = ARRAY_LEN(gbp_policy_dpo_error_strings),
529 .error_strings = gbp_policy_dpo_error_strings,
531 .n_next_nodes = GBP_POLICY_N_NEXT,
534 [GBP_POLICY_DROP] = "ip6-drop",
540 * fd.io coding-style-patch-verification: ON
543 * eval: (c-set-style "gnu")