diff options
Diffstat (limited to 'extras/deprecated/plugins/gbp/gbp_policy_dpo.c')
| -rw-r--r-- | extras/deprecated/plugins/gbp/gbp_policy_dpo.c | 420 |
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: + */ |