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.h>
23 #include <plugins/gbp/gbp_policy_dpo.h>
24 #include <plugins/gbp/gbp_recirc.h>
25 #include <plugins/gbp/gbp_contract.h>
27 #ifndef CLIB_MARCH_VARIANT
31 gbp_policy_dpo_t *gbp_policy_dpo_pool;
34 * DPO type registered for these GBP FWD
36 dpo_type_t gbp_policy_dpo_type;
38 static gbp_policy_dpo_t *
39 gbp_policy_dpo_alloc (void)
41 gbp_policy_dpo_t *gpd;
43 pool_get_aligned_zero (gbp_policy_dpo_pool, gpd, CLIB_CACHE_LINE_BYTES);
48 static inline gbp_policy_dpo_t *
49 gbp_policy_dpo_get_from_dpo (const dpo_id_t * dpo)
51 ASSERT (gbp_policy_dpo_type == dpo->dpoi_type);
53 return (gbp_policy_dpo_get (dpo->dpoi_index));
57 gbp_policy_dpo_get_index (gbp_policy_dpo_t * gpd)
59 return (gpd - gbp_policy_dpo_pool);
63 gbp_policy_dpo_lock (dpo_id_t * dpo)
65 gbp_policy_dpo_t *gpd;
67 gpd = gbp_policy_dpo_get_from_dpo (dpo);
72 gbp_policy_dpo_unlock (dpo_id_t * dpo)
74 gbp_policy_dpo_t *gpd;
76 gpd = gbp_policy_dpo_get_from_dpo (dpo);
79 if (0 == gpd->gpd_locks)
81 dpo_reset (&gpd->gpd_dpo);
82 pool_put (gbp_policy_dpo_pool, gpd);
87 gbp_policy_dpo_get_urpf (const dpo_id_t * dpo)
89 gbp_policy_dpo_t *gpd;
91 gpd = gbp_policy_dpo_get_from_dpo (dpo);
93 return (gpd->gpd_sw_if_index);
97 gbp_policy_dpo_add_or_lock (dpo_proto_t dproto,
99 sclass_t sclass, u32 sw_if_index, dpo_id_t * dpo)
101 gbp_policy_dpo_t *gpd;
102 dpo_id_t parent = DPO_INVALID;
104 gpd = gbp_policy_dpo_alloc ();
106 gpd->gpd_proto = dproto;
107 gpd->gpd_sw_if_index = sw_if_index;
108 gpd->gpd_sclass = sclass;
109 gpd->gpd_scope = scope;
111 if (~0 != sw_if_index)
114 * stack on the DVR DPO for the output interface
116 dvr_dpo_add_or_lock (sw_if_index, dproto, &parent);
120 dpo_copy (&parent, drop_dpo_get (dproto));
123 dpo_stack (gbp_policy_dpo_type, dproto, &gpd->gpd_dpo, &parent);
124 dpo_set (dpo, gbp_policy_dpo_type, dproto, gbp_policy_dpo_get_index (gpd));
128 format_gbp_policy_dpo (u8 * s, va_list * ap)
130 index_t index = va_arg (*ap, index_t);
131 u32 indent = va_arg (*ap, u32);
132 gbp_policy_dpo_t *gpd = gbp_policy_dpo_get (index);
133 vnet_main_t *vnm = vnet_get_main ();
135 s = format (s, "gbp-policy-dpo: %U, scope:%d sclass:%d out:%U",
136 format_dpo_proto, gpd->gpd_proto,
137 gpd->gpd_scope, (int) gpd->gpd_sclass,
138 format_vnet_sw_if_index_name, vnm, gpd->gpd_sw_if_index);
139 s = format (s, "\n%U", format_white_space, indent + 2);
140 s = format (s, "%U", format_dpo_id, &gpd->gpd_dpo, indent + 4);
146 * Interpose a policy DPO
149 gbp_policy_dpo_interpose (const dpo_id_t * original,
150 const dpo_id_t * parent, dpo_id_t * clone)
152 gbp_policy_dpo_t *gpd, *gpd_clone;
154 gpd_clone = gbp_policy_dpo_alloc ();
155 gpd = gbp_policy_dpo_get (original->dpoi_index);
157 gpd_clone->gpd_proto = gpd->gpd_proto;
158 gpd_clone->gpd_scope = gpd->gpd_scope;
159 gpd_clone->gpd_sclass = gpd->gpd_sclass;
160 gpd_clone->gpd_sw_if_index = gpd->gpd_sw_if_index;
163 * if no interface is provided, grab one from the parent
166 if (~0 == gpd_clone->gpd_sw_if_index)
167 gpd_clone->gpd_sw_if_index = dpo_get_urpf (parent);
169 dpo_stack (gbp_policy_dpo_type,
170 gpd_clone->gpd_proto, &gpd_clone->gpd_dpo, parent);
174 gpd_clone->gpd_proto, gbp_policy_dpo_get_index (gpd_clone));
177 const static dpo_vft_t gbp_policy_dpo_vft = {
178 .dv_lock = gbp_policy_dpo_lock,
179 .dv_unlock = gbp_policy_dpo_unlock,
180 .dv_format = format_gbp_policy_dpo,
181 .dv_get_urpf = gbp_policy_dpo_get_urpf,
182 .dv_mk_interpose = gbp_policy_dpo_interpose,
186 * @brief The per-protocol VLIB graph nodes that are assigned to a glean
189 * this means that these graph nodes are ones from which a glean is the
190 * parent object in the DPO-graph.
192 const static char *const gbp_policy_dpo_ip4_nodes[] = {
193 "ip4-gbp-policy-dpo",
197 const static char *const gbp_policy_dpo_ip6_nodes[] = {
198 "ip6-gbp-policy-dpo",
202 const static char *const *const gbp_policy_dpo_nodes[DPO_PROTO_NUM] = {
203 [DPO_PROTO_IP4] = gbp_policy_dpo_ip4_nodes,
204 [DPO_PROTO_IP6] = gbp_policy_dpo_ip6_nodes,
208 gbp_policy_dpo_get_type (void)
210 return (gbp_policy_dpo_type);
213 static clib_error_t *
214 gbp_policy_dpo_module_init (vlib_main_t * vm)
216 gbp_policy_dpo_type = dpo_register_new_type (&gbp_policy_dpo_vft,
217 gbp_policy_dpo_nodes);
222 VLIB_INIT_FUNCTION (gbp_policy_dpo_module_init);
223 #endif /* CLIB_MARCH_VARIANT */
232 gbp_rule_l3_redirect (const gbp_rule_t * gu, vlib_buffer_t * b0, int is_ip6)
234 gbp_policy_node_t pnode;
238 pnode = (is_ip6 ? GBP_POLICY_NODE_IP6 : GBP_POLICY_NODE_IP4);
239 dproto = (is_ip6 ? DPO_PROTO_IP6 : DPO_PROTO_IP4);
240 dpo = &gu->gu_dpo[pnode][dproto];
242 /* The flow hash is still valid as this is a IP packet being switched */
243 vnet_buffer (b0)->ip.adj_index[VLIB_TX] = dpo->dpoi_index;
245 return (dpo->dpoi_next_node);
249 gbp_policy_dpo_inline (vlib_main_t * vm,
250 vlib_node_runtime_t * node,
251 vlib_frame_t * from_frame, u8 is_ip6)
253 gbp_main_t *gm = &gbp_main;
254 u32 n_left_from, next_index, *from, *to_next;
255 u32 n_allow_intra, n_allow_a_bit, n_allow_sclass_1;
257 from = vlib_frame_vector_args (from_frame);
258 n_left_from = from_frame->n_vectors;
259 n_allow_intra = n_allow_a_bit = n_allow_sclass_1 = 0;
261 next_index = node->cached_next_index;
263 while (n_left_from > 0)
267 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
269 while (n_left_from > 0 && n_left_to_next > 0)
271 gbp_rule_action_t action0 = GBP_RULE_DENY;
272 u32 acl_match = ~0, rule_match = ~0;
273 const gbp_policy_dpo_t *gpd0;
274 gbp_contract_error_t err0;
275 gbp_contract_key_t key0;
286 next0 = GBP_POLICY_DROP;
288 b0 = vlib_get_buffer (vm, bi0);
290 gpd0 = gbp_policy_dpo_get (vnet_buffer (b0)->ip.adj_index[VLIB_TX]);
291 vnet_buffer (b0)->ip.adj_index[VLIB_TX] = gpd0->gpd_dpo.dpoi_index;
294 * Reflection check; in and out on an ivxlan tunnel
296 if ((~0 != vxlan_gbp_tunnel_by_sw_if_index (gpd0->gpd_sw_if_index))
297 && (vnet_buffer2 (b0)->gbp.flags & VXLAN_GBP_GPFLAGS_R))
302 if (vnet_buffer2 (b0)->gbp.flags & VXLAN_GBP_GPFLAGS_A)
304 next0 = gpd0->gpd_dpo.dpoi_next_node;
310 /* zero out the key to ensure the pad space is clear */
312 key0.gck_src = vnet_buffer2 (b0)->gbp.sclass;
314 if (SCLASS_INVALID == key0.gck_src)
317 * the src EPG is not set when the packet arrives on an EPG
318 * uplink interface and we do not need to apply policy
320 next0 = gpd0->gpd_dpo.dpoi_next_node;
324 key0.gck_scope = gpd0->gpd_scope;
325 key0.gck_dst = gpd0->gpd_sclass;
328 gbp_contract_apply (vm, gm, &key0, b0, &rule0, &n_allow_intra,
329 &n_allow_sclass_1, &acl_match, &rule_match,
331 is_ip6 ? GBP_CONTRACT_APPLY_IP6 :
332 GBP_CONTRACT_APPLY_IP4);
335 case GBP_RULE_PERMIT:
336 next0 = gpd0->gpd_dpo.dpoi_next_node;
337 vnet_buffer2 (b0)->gbp.flags |= VXLAN_GBP_GPFLAGS_A;
339 case GBP_RULE_REDIRECT:
340 next0 = gbp_rule_l3_redirect (rule0, b0, is_ip6);
341 vnet_buffer2 (b0)->gbp.flags |= VXLAN_GBP_GPFLAGS_A;
344 next0 = GBP_POLICY_DROP;
345 b0->error = node->errors[err0];
350 gbp_policy_trace (vm, node, b0, &key0, action0, acl_match,
353 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
354 n_left_to_next, bi0, next0);
356 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
359 vlib_node_increment_counter (vm, node->node_index,
360 GBP_CONTRACT_ERROR_ALLOW_INTRA, n_allow_intra);
361 vlib_node_increment_counter (vm, node->node_index,
362 GBP_CONTRACT_ERROR_ALLOW_A_BIT, n_allow_a_bit);
363 vlib_node_increment_counter (vm, node->node_index,
364 GBP_CONTRACT_ERROR_ALLOW_SCLASS_1,
366 return from_frame->n_vectors;
369 VLIB_NODE_FN (ip4_gbp_policy_dpo_node) (vlib_main_t * vm,
370 vlib_node_runtime_t * node,
371 vlib_frame_t * from_frame)
373 return (gbp_policy_dpo_inline (vm, node, from_frame, 0));
376 VLIB_NODE_FN (ip6_gbp_policy_dpo_node) (vlib_main_t * vm,
377 vlib_node_runtime_t * node,
378 vlib_frame_t * from_frame)
380 return (gbp_policy_dpo_inline (vm, node, from_frame, 1));
384 VLIB_REGISTER_NODE (ip4_gbp_policy_dpo_node) = {
385 .name = "ip4-gbp-policy-dpo",
386 .vector_size = sizeof (u32),
387 .format_trace = format_gbp_policy_trace,
389 .n_errors = ARRAY_LEN(gbp_contract_error_strings),
390 .error_strings = gbp_contract_error_strings,
392 .n_next_nodes = GBP_POLICY_N_NEXT,
395 [GBP_POLICY_DROP] = "ip4-drop",
398 VLIB_REGISTER_NODE (ip6_gbp_policy_dpo_node) = {
399 .name = "ip6-gbp-policy-dpo",
400 .vector_size = sizeof (u32),
401 .format_trace = format_gbp_policy_trace,
403 .n_errors = ARRAY_LEN(gbp_contract_error_strings),
404 .error_strings = gbp_contract_error_strings,
406 .n_next_nodes = GBP_POLICY_N_NEXT,
409 [GBP_POLICY_DROP] = "ip6-drop",
415 * fd.io coding-style-patch-verification: ON
418 * eval: (c-set-style "gnu")