+++ /dev/null
-/*
- * Copyright (c) 2018 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.
- */
-
-#include <vnet/dpo/dvr_dpo.h>
-#include <vnet/dpo/drop_dpo.h>
-#include <vnet/vxlan-gbp/vxlan_gbp_packet.h>
-#include <vnet/vxlan-gbp/vxlan_gbp.h>
-
-#include <plugins/gbp/gbp.h>
-#include <plugins/gbp/gbp_policy.h>
-#include <plugins/gbp/gbp_policy_dpo.h>
-#include <plugins/gbp/gbp_recirc.h>
-#include <plugins/gbp/gbp_contract.h>
-
-#ifndef CLIB_MARCH_VARIANT
-/**
- * DPO pool
- */
-gbp_policy_dpo_t *gbp_policy_dpo_pool;
-
-/**
- * DPO type registered for these GBP FWD
- */
-dpo_type_t gbp_policy_dpo_type;
-
-static gbp_policy_dpo_t *
-gbp_policy_dpo_alloc (void)
-{
- gbp_policy_dpo_t *gpd;
-
- pool_get_aligned_zero (gbp_policy_dpo_pool, gpd, CLIB_CACHE_LINE_BYTES);
-
- return (gpd);
-}
-
-static inline gbp_policy_dpo_t *
-gbp_policy_dpo_get_from_dpo (const dpo_id_t * dpo)
-{
- ASSERT (gbp_policy_dpo_type == dpo->dpoi_type);
-
- return (gbp_policy_dpo_get (dpo->dpoi_index));
-}
-
-static inline index_t
-gbp_policy_dpo_get_index (gbp_policy_dpo_t * gpd)
-{
- return (gpd - gbp_policy_dpo_pool);
-}
-
-static void
-gbp_policy_dpo_lock (dpo_id_t * dpo)
-{
- gbp_policy_dpo_t *gpd;
-
- gpd = gbp_policy_dpo_get_from_dpo (dpo);
- gpd->gpd_locks++;
-}
-
-static void
-gbp_policy_dpo_unlock (dpo_id_t * dpo)
-{
- gbp_policy_dpo_t *gpd;
-
- gpd = gbp_policy_dpo_get_from_dpo (dpo);
- gpd->gpd_locks--;
-
- if (0 == gpd->gpd_locks)
- {
- dpo_reset (&gpd->gpd_dpo);
- pool_put (gbp_policy_dpo_pool, gpd);
- }
-}
-
-static u32
-gbp_policy_dpo_get_urpf (const dpo_id_t * dpo)
-{
- gbp_policy_dpo_t *gpd;
-
- gpd = gbp_policy_dpo_get_from_dpo (dpo);
-
- return (gpd->gpd_sw_if_index);
-}
-
-void
-gbp_policy_dpo_add_or_lock (dpo_proto_t dproto,
- gbp_scope_t scope,
- sclass_t sclass, u32 sw_if_index, dpo_id_t * dpo)
-{
- gbp_policy_dpo_t *gpd;
- dpo_id_t parent = DPO_INVALID;
-
- gpd = gbp_policy_dpo_alloc ();
-
- gpd->gpd_proto = dproto;
- gpd->gpd_sw_if_index = sw_if_index;
- gpd->gpd_sclass = sclass;
- gpd->gpd_scope = scope;
-
- if (~0 != sw_if_index)
- {
- /*
- * stack on the DVR DPO for the output interface
- */
- dvr_dpo_add_or_lock (sw_if_index, dproto, &parent);
- }
- else
- {
- dpo_copy (&parent, drop_dpo_get (dproto));
- }
-
- dpo_stack (gbp_policy_dpo_type, dproto, &gpd->gpd_dpo, &parent);
- dpo_set (dpo, gbp_policy_dpo_type, dproto, gbp_policy_dpo_get_index (gpd));
-}
-
-u8 *
-format_gbp_policy_dpo (u8 * s, va_list * ap)
-{
- index_t index = va_arg (*ap, index_t);
- u32 indent = va_arg (*ap, u32);
- gbp_policy_dpo_t *gpd = gbp_policy_dpo_get (index);
- vnet_main_t *vnm = vnet_get_main ();
-
- s = format (s, "gbp-policy-dpo: %U, scope:%d sclass:%d out:%U",
- format_dpo_proto, gpd->gpd_proto,
- gpd->gpd_scope, (int) gpd->gpd_sclass,
- format_vnet_sw_if_index_name, vnm, gpd->gpd_sw_if_index);
- s = format (s, "\n%U", format_white_space, indent + 2);
- s = format (s, "%U", format_dpo_id, &gpd->gpd_dpo, indent + 4);
-
- return (s);
-}
-
-/**
- * Interpose a policy DPO
- */
-static void
-gbp_policy_dpo_interpose (const dpo_id_t * original,
- const dpo_id_t * parent, dpo_id_t * clone)
-{
- gbp_policy_dpo_t *gpd, *gpd_clone;
-
- gpd_clone = gbp_policy_dpo_alloc ();
- gpd = gbp_policy_dpo_get (original->dpoi_index);
-
- gpd_clone->gpd_proto = gpd->gpd_proto;
- gpd_clone->gpd_scope = gpd->gpd_scope;
- gpd_clone->gpd_sclass = gpd->gpd_sclass;
- gpd_clone->gpd_sw_if_index = gpd->gpd_sw_if_index;
-
- /*
- * if no interface is provided, grab one from the parent
- * on which we stack
- */
- if (~0 == gpd_clone->gpd_sw_if_index)
- gpd_clone->gpd_sw_if_index = dpo_get_urpf (parent);
-
- dpo_stack (gbp_policy_dpo_type,
- gpd_clone->gpd_proto, &gpd_clone->gpd_dpo, parent);
-
- dpo_set (clone,
- gbp_policy_dpo_type,
- gpd_clone->gpd_proto, gbp_policy_dpo_get_index (gpd_clone));
-}
-
-const static dpo_vft_t gbp_policy_dpo_vft = {
- .dv_lock = gbp_policy_dpo_lock,
- .dv_unlock = gbp_policy_dpo_unlock,
- .dv_format = format_gbp_policy_dpo,
- .dv_get_urpf = gbp_policy_dpo_get_urpf,
- .dv_mk_interpose = gbp_policy_dpo_interpose,
-};
-
-/**
- * @brief The per-protocol VLIB graph nodes that are assigned to a glean
- * object.
- *
- * this means that these graph nodes are ones from which a glean is the
- * parent object in the DPO-graph.
- */
-const static char *const gbp_policy_dpo_ip4_nodes[] = {
- "ip4-gbp-policy-dpo",
- NULL,
-};
-
-const static char *const gbp_policy_dpo_ip6_nodes[] = {
- "ip6-gbp-policy-dpo",
- NULL,
-};
-
-const static char *const *const gbp_policy_dpo_nodes[DPO_PROTO_NUM] = {
- [DPO_PROTO_IP4] = gbp_policy_dpo_ip4_nodes,
- [DPO_PROTO_IP6] = gbp_policy_dpo_ip6_nodes,
-};
-
-dpo_type_t
-gbp_policy_dpo_get_type (void)
-{
- return (gbp_policy_dpo_type);
-}
-
-static clib_error_t *
-gbp_policy_dpo_module_init (vlib_main_t * vm)
-{
- gbp_policy_dpo_type = dpo_register_new_type (&gbp_policy_dpo_vft,
- gbp_policy_dpo_nodes);
-
- return (NULL);
-}
-
-VLIB_INIT_FUNCTION (gbp_policy_dpo_module_init);
-#endif /* CLIB_MARCH_VARIANT */
-
-typedef enum
-{
- GBP_POLICY_DROP,
- GBP_POLICY_N_NEXT,
-} gbp_policy_next_t;
-
-always_inline u32
-gbp_rule_l3_redirect (const gbp_rule_t * gu, vlib_buffer_t * b0, int is_ip6)
-{
- gbp_policy_node_t pnode;
- const dpo_id_t *dpo;
- dpo_proto_t dproto;
-
- pnode = (is_ip6 ? GBP_POLICY_NODE_IP6 : GBP_POLICY_NODE_IP4);
- dproto = (is_ip6 ? DPO_PROTO_IP6 : DPO_PROTO_IP4);
- dpo = &gu->gu_dpo[pnode][dproto];
-
- /* The flow hash is still valid as this is a IP packet being switched */
- vnet_buffer (b0)->ip.adj_index[VLIB_TX] = dpo->dpoi_index;
-
- return (dpo->dpoi_next_node);
-}
-
-always_inline uword
-gbp_policy_dpo_inline (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * from_frame, u8 is_ip6)
-{
- gbp_main_t *gm = &gbp_main;
- u32 n_left_from, next_index, *from, *to_next;
- u32 n_allow_intra, n_allow_a_bit, n_allow_sclass_1;
-
- from = vlib_frame_vector_args (from_frame);
- n_left_from = from_frame->n_vectors;
- n_allow_intra = n_allow_a_bit = n_allow_sclass_1 = 0;
-
- next_index = node->cached_next_index;
-
- while (n_left_from > 0)
- {
- u32 n_left_to_next;
-
- vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
-
- while (n_left_from > 0 && n_left_to_next > 0)
- {
- gbp_rule_action_t action0 = GBP_RULE_DENY;
- u32 acl_match = ~0, rule_match = ~0;
- const gbp_policy_dpo_t *gpd0;
- gbp_contract_error_t err0;
- gbp_contract_key_t key0;
- vlib_buffer_t *b0;
- gbp_rule_t *rule0;
- u32 bi0, next0;
-
- bi0 = from[0];
- to_next[0] = bi0;
- from += 1;
- to_next += 1;
- n_left_from -= 1;
- n_left_to_next -= 1;
- next0 = GBP_POLICY_DROP;
-
- b0 = vlib_get_buffer (vm, bi0);
-
- gpd0 = gbp_policy_dpo_get (vnet_buffer (b0)->ip.adj_index[VLIB_TX]);
- vnet_buffer (b0)->ip.adj_index[VLIB_TX] = gpd0->gpd_dpo.dpoi_index;
-
- /*
- * Reflection check; in and out on an ivxlan tunnel
- */
- if ((~0 != vxlan_gbp_tunnel_by_sw_if_index (gpd0->gpd_sw_if_index))
- && (vnet_buffer2 (b0)->gbp.flags & VXLAN_GBP_GPFLAGS_R))
- {
- goto trace;
- }
-
- if (vnet_buffer2 (b0)->gbp.flags & VXLAN_GBP_GPFLAGS_A)
- {
- next0 = gpd0->gpd_dpo.dpoi_next_node;
- key0.as_u64 = ~0;
- n_allow_a_bit++;
- goto trace;
- }
-
- /* zero out the key to ensure the pad space is clear */
- key0.as_u64 = 0;
- key0.gck_src = vnet_buffer2 (b0)->gbp.sclass;
-
- if (SCLASS_INVALID == key0.gck_src)
- {
- /*
- * the src EPG is not set when the packet arrives on an EPG
- * uplink interface and we do not need to apply policy
- */
- next0 = gpd0->gpd_dpo.dpoi_next_node;
- goto trace;
- }
-
- key0.gck_scope = gpd0->gpd_scope;
- key0.gck_dst = gpd0->gpd_sclass;
-
- action0 =
- gbp_contract_apply (vm, gm, &key0, b0, &rule0, &n_allow_intra,
- &n_allow_sclass_1, &acl_match, &rule_match,
- &err0,
- is_ip6 ? GBP_CONTRACT_APPLY_IP6 :
- GBP_CONTRACT_APPLY_IP4);
- switch (action0)
- {
- case GBP_RULE_PERMIT:
- next0 = gpd0->gpd_dpo.dpoi_next_node;
- vnet_buffer2 (b0)->gbp.flags |= VXLAN_GBP_GPFLAGS_A;
- break;
- case GBP_RULE_REDIRECT:
- next0 = gbp_rule_l3_redirect (rule0, b0, is_ip6);
- vnet_buffer2 (b0)->gbp.flags |= VXLAN_GBP_GPFLAGS_A;
- break;
- case GBP_RULE_DENY:
- next0 = GBP_POLICY_DROP;
- b0->error = node->errors[err0];
- break;
- }
-
- trace:
- gbp_policy_trace (vm, node, b0, &key0, action0, acl_match,
- rule_match);
-
- 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);
- }
-
- vlib_node_increment_counter (vm, node->node_index,
- GBP_CONTRACT_ERROR_ALLOW_INTRA, n_allow_intra);
- vlib_node_increment_counter (vm, node->node_index,
- GBP_CONTRACT_ERROR_ALLOW_A_BIT, n_allow_a_bit);
- vlib_node_increment_counter (vm, node->node_index,
- GBP_CONTRACT_ERROR_ALLOW_SCLASS_1,
- n_allow_sclass_1);
- return from_frame->n_vectors;
-}
-
-VLIB_NODE_FN (ip4_gbp_policy_dpo_node) (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * from_frame)
-{
- return (gbp_policy_dpo_inline (vm, node, from_frame, 0));
-}
-
-VLIB_NODE_FN (ip6_gbp_policy_dpo_node) (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * from_frame)
-{
- return (gbp_policy_dpo_inline (vm, node, from_frame, 1));
-}
-
-/* *INDENT-OFF* */
-VLIB_REGISTER_NODE (ip4_gbp_policy_dpo_node) = {
- .name = "ip4-gbp-policy-dpo",
- .vector_size = sizeof (u32),
- .format_trace = format_gbp_policy_trace,
-
- .n_errors = ARRAY_LEN(gbp_contract_error_strings),
- .error_strings = gbp_contract_error_strings,
-
- .n_next_nodes = GBP_POLICY_N_NEXT,
- .next_nodes =
- {
- [GBP_POLICY_DROP] = "ip4-drop",
- }
-};
-VLIB_REGISTER_NODE (ip6_gbp_policy_dpo_node) = {
- .name = "ip6-gbp-policy-dpo",
- .vector_size = sizeof (u32),
- .format_trace = format_gbp_policy_trace,
-
- .n_errors = ARRAY_LEN(gbp_contract_error_strings),
- .error_strings = gbp_contract_error_strings,
-
- .n_next_nodes = GBP_POLICY_N_NEXT,
- .next_nodes =
- {
- [GBP_POLICY_DROP] = "ip6-drop",
- }
-};
-/* *INDENT-ON* */
-
-/*
- * fd.io coding-style-patch-verification: ON
- *
- * Local Variables:
- * eval: (c-set-style "gnu")
- * End:
- */
Code Review / vpp.git / blobdiff