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authorNeale Ranns <nranns@cisco.com>2020-09-14 07:41:48 +0000
committerDamjan Marion <dmarion@me.com>2021-11-23 13:03:36 +0000
commit3be9164f80ebb1929488bbe2ee4da1d35f42c1a2 (patch)
tree3fdd1b7cefd596a9fb3d8cef171985b82405d6e4 /extras/deprecated/plugins/gbp/gbp_policy_dpo.c
parent0a7551bef872363bd3a25129bdc91dbf2a3b1ee2 (diff)
misc: deprecate gbp and its dependents
Type: improvement Signed-off-by: Neale Ranns <nranns@cisco.com> Signed-off-by: BenoƮt Ganne <bganne@cisco.com> Change-Id: I2f30a4f04fd9a8635ce2d259b5fd5b0c85cee8c3
Diffstat (limited to 'extras/deprecated/plugins/gbp/gbp_policy_dpo.c')
-rw-r--r--extras/deprecated/plugins/gbp/gbp_policy_dpo.c420
1 files changed, 420 insertions, 0 deletions
diff --git a/extras/deprecated/plugins/gbp/gbp_policy_dpo.c b/extras/deprecated/plugins/gbp/gbp_policy_dpo.c
new file mode 100644
index 00000000000..9f26b9c67ab
--- /dev/null
+++ b/extras/deprecated/plugins/gbp/gbp_policy_dpo.c
@@ -0,0 +1,420 @@
+/*
+ * 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:
+ */