X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=src%2Fplugins%2Fgbp%2Fgbp_policy_dpo.c;fp=src%2Fplugins%2Fgbp%2Fgbp_policy_dpo.c;h=bfe5974f8070295d98158970809fd518960ba3d2;hb=25b049484fcf9161edb2c19250066b893c38c264;hp=0000000000000000000000000000000000000000;hpb=4f8863b21405d1ab3e067e978a60be72a343358b;p=vpp.git diff --git a/src/plugins/gbp/gbp_policy_dpo.c b/src/plugins/gbp/gbp_policy_dpo.c new file mode 100644 index 00000000000..bfe5974f807 --- /dev/null +++ b/src/plugins/gbp/gbp_policy_dpo.c @@ -0,0 +1,537 @@ +/* + * 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 +#include +#include + +#include +#include +#include +#include + +/** + * DPO pool + */ +static gbp_policy_dpo_t *gbp_policy_dpo_pool; + +/** + * DPO type registered for these GBP FWD + */ +static dpo_type_t gbp_policy_dpo_type; + +static inline gbp_policy_dpo_t * +gbp_policy_dpo_get_i (index_t index) +{ + return (pool_elt_at_index (gbp_policy_dpo_pool, index)); +} + +gbp_policy_dpo_t * +gbp_policy_dpo_get (index_t index) +{ + return (gbp_policy_dpo_get_i (index)); +} + +static gbp_policy_dpo_t * +gbp_policy_dpo_alloc (void) +{ + gbp_policy_dpo_t *gpd; + + pool_get (gbp_policy_dpo_pool, gpd); + + 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_i (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); + } +} + +void +gbp_policy_dpo_add_or_lock (dpo_proto_t dproto, + epg_id_t epg, u32 sw_if_index, dpo_id_t * dpo) +{ + gbp_policy_dpo_t *gpd; + dpo_id_t parent = DPO_INVALID; + + gpd = gbp_policy_dpo_alloc (); + memset (gpd, 0, sizeof (*gpd)); + + gpd->gpd_proto = dproto; + gpd->gpd_sw_if_index = sw_if_index; + gpd->gpd_epg = epg; + + /* + * stack on the DVR DPO for the output interface + */ + dvr_dpo_add_or_lock (sw_if_index, dproto, &parent); + + 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_i (index); + vnet_main_t *vnm = vnet_get_main (); + + s = format (s, "gbp-policy-dpo: %U, epg:%d out:%U", + format_dpo_proto, gpd->gpd_proto, + gpd->gpd_epg, + 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); +} + +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, +}; + +/** + * @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); + +typedef struct gbp_policy_dpo_trace_t_ +{ + u32 src_epg; + u32 dst_epg; + u32 acl_index; +} gbp_policy_dpo_trace_t; + +typedef enum +{ + GBP_POLICY_DROP, + GBP_POLICY_N_NEXT, +} gbp_policy_next_t; + +always_inline uword +gbp_policy_dpo_inline (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * from_frame, fib_protocol_t fproto) +{ + u32 n_left_from, next_index, *from, *to_next; + + from = vlib_frame_vector_args (from_frame); + n_left_from = from_frame->n_vectors; + + 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) + { + const gbp_policy_dpo_t *gpd0; + u32 bi0, next0, acl_index0; + gbp_contract_key_t key0; + vlib_buffer_t *b0; + + 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; + acl_index0 = ~0; + + b0 = vlib_get_buffer (vm, bi0); + gpd0 = + gbp_policy_dpo_get_i (vnet_buffer (b0)->ip.adj_index[VLIB_TX]); + vnet_buffer (b0)->ip.adj_index[VLIB_TX] = gpd0->gpd_dpo.dpoi_index; + + key0.gck_src = vnet_buffer2 (b0)->gbp.src_epg; + key0.gck_dst = gpd0->gpd_epg; + + if (~0 != key0.gck_src) + { + if (PREDICT_FALSE (key0.gck_src == key0.gck_dst)) + { + /* + * intra-epg allowed + */ + next0 = gpd0->gpd_dpo.dpoi_next_node; + } + else + { + acl_index0 = gbp_acl_lookup (&key0); + + if (~0 != acl_index0) + { + /* + * TODO tests against the ACL + */ + /* + * ACL tables are not available outside of ACL plugin + * until then bypass the ACL to next node + */ + next0 = gpd0->gpd_dpo.dpoi_next_node; + } + } + } + else + { + /* + * 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; + } + + if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED)) + { + gbp_policy_dpo_trace_t *tr; + + tr = vlib_add_trace (vm, node, b0, sizeof (*tr)); + tr->src_epg = key0.gck_src; + tr->dst_epg = key0.gck_dst; + tr->acl_index = acl_index0; + } + + 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); + } + return from_frame->n_vectors; +} + +static u8 * +format_gbp_policy_dpo_trace (u8 * s, va_list * args) +{ + CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *); + CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *); + gbp_policy_dpo_trace_t *t = va_arg (*args, gbp_policy_dpo_trace_t *); + + s = format (s, " src-epg:%d dst-epg:%d acl-index:%d", + t->src_epg, t->dst_epg, t->acl_index); + + return s; +} + +static uword +ip4_gbp_policy_dpo (vlib_main_t * vm, + vlib_node_runtime_t * node, vlib_frame_t * from_frame) +{ + return (gbp_policy_dpo_inline (vm, node, from_frame, FIB_PROTOCOL_IP4)); +} + +static uword +ip6_gbp_policy_dpo (vlib_main_t * vm, + vlib_node_runtime_t * node, vlib_frame_t * from_frame) +{ + return (gbp_policy_dpo_inline (vm, node, from_frame, FIB_PROTOCOL_IP6)); +} + +/* *INDENT-OFF* */ +VLIB_REGISTER_NODE (ip4_gbp_policy_dpo_node) = { + .function = ip4_gbp_policy_dpo, + .name = "ip4-gbp-policy-dpo", + .vector_size = sizeof (u32), + .format_trace = format_gbp_policy_dpo_trace, + .n_next_nodes = GBP_POLICY_N_NEXT, + .next_nodes = + { + [GBP_POLICY_DROP] = "ip4-drop", + } +}; +VLIB_REGISTER_NODE (ip6_gbp_policy_dpo_node) = { + .function = ip6_gbp_policy_dpo, + .name = "ip6-gbp-policy-dpo", + .vector_size = sizeof (u32), + .format_trace = format_gbp_policy_dpo_trace, + .n_next_nodes = GBP_POLICY_N_NEXT, + .next_nodes = + { + [GBP_POLICY_DROP] = "ip6-drop", + } +}; + +VLIB_NODE_FUNCTION_MULTIARCH (ip4_gbp_policy_dpo_node, ip4_gbp_policy_dpo) +VLIB_NODE_FUNCTION_MULTIARCH (ip6_gbp_policy_dpo_node, ip6_gbp_policy_dpo) +/* *INDENT-ON* */ + + /** + * per-packet trace data + */ +typedef struct gbp_classify_trace_t_ +{ + /* per-pkt trace data */ + epg_id_t src_epg; +} gbp_classify_trace_t; + +typedef enum gbp_lpm_classify_next_t_ +{ + GPB_LPM_CLASSIFY_DROP, +} gbp_lpm_classify_next_t; + +/* + * Determine the SRC EPG from a LPM + */ +always_inline uword +gbp_lpm_classify_inline (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame, fib_protocol_t fproto) +{ + u32 n_left_from, *from, *to_next; + u32 next_index; + + next_index = 0; + n_left_from = frame->n_vectors; + from = vlib_frame_vector_args (frame); + + 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) + { + u32 bi0, sw_if_index0, fib_index0, lbi0; + gbp_lpm_classify_next_t next0; + const gbp_policy_dpo_t *gpd0; + const gbp_recirc_t *gr0; + const dpo_id_t *dpo0; + load_balance_t *lb0; + ip4_header_t *ip4_0; + ip6_header_t *ip6_0; + vlib_buffer_t *b0; + epg_id_t src_epg0; + + bi0 = from[0]; + to_next[0] = bi0; + from += 1; + to_next += 1; + n_left_from -= 1; + n_left_to_next -= 1; + next0 = GPB_LPM_CLASSIFY_DROP; + + b0 = vlib_get_buffer (vm, bi0); + + sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX]; + gr0 = gbp_recirc_get (sw_if_index0); + fib_index0 = gr0->gr_fib_index[fproto]; + + if (FIB_PROTOCOL_IP4 == fproto) + { + ip4_0 = vlib_buffer_get_current (b0); + lbi0 = ip4_fib_forwarding_lookup (fib_index0, + &ip4_0->src_address); + } + else + { + ip6_0 = vlib_buffer_get_current (b0); + lbi0 = ip6_fib_table_fwding_lookup (&ip6_main, fib_index0, + &ip6_0->src_address); + } + + lb0 = load_balance_get (lbi0); + dpo0 = load_balance_get_bucket_i (lb0, 0); + + if (gbp_policy_dpo_type == dpo0->dpoi_type) + { + gpd0 = gbp_policy_dpo_get_i (dpo0->dpoi_index); + src_epg0 = gpd0->gpd_epg; + vnet_feature_next (vnet_buffer (b0)->sw_if_index[VLIB_RX], + &next0, b0); + } + else + { + /* could not classify => drop */ + src_epg0 = 0; + } + + vnet_buffer2 (b0)->gbp.src_epg = src_epg0; + + if (PREDICT_FALSE ((b0->flags & VLIB_BUFFER_IS_TRACED))) + { + gbp_classify_trace_t *t = + vlib_add_trace (vm, node, b0, sizeof (*t)); + t->src_epg = src_epg0; + } + + 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); + } + + return frame->n_vectors; +} + +static uword +gbp_ip4_lpm_classify (vlib_main_t * vm, + vlib_node_runtime_t * node, vlib_frame_t * frame) +{ + return (gbp_lpm_classify_inline (vm, node, frame, FIB_PROTOCOL_IP4)); +} + +static uword +gbp_ip6_lpm_classify (vlib_main_t * vm, + vlib_node_runtime_t * node, vlib_frame_t * frame) +{ + return (gbp_lpm_classify_inline (vm, node, frame, FIB_PROTOCOL_IP6)); +} + + /* packet trace format function */ +static u8 * +format_gbp_classify_trace (u8 * s, va_list * args) +{ + CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *); + CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *); + gbp_classify_trace_t *t = va_arg (*args, gbp_classify_trace_t *); + + s = format (s, "src-epg:%d", t->src_epg); + + return s; +} + +/* *INDENT-OFF* */ +VLIB_REGISTER_NODE (gbp_ip4_lpm_classify_node) = { + .function = gbp_ip4_lpm_classify, + .name = "ip4-gbp-lpm-classify", + .vector_size = sizeof (u32), + .format_trace = format_gbp_classify_trace, + .type = VLIB_NODE_TYPE_INTERNAL, + + .n_errors = 0, + .n_next_nodes = 1, + .next_nodes = { + [GPB_LPM_CLASSIFY_DROP] = "ip4-drop" + }, +}; + +VLIB_NODE_FUNCTION_MULTIARCH (gbp_ip4_lpm_classify_node, gbp_ip4_lpm_classify); + +VLIB_REGISTER_NODE (gbp_ip6_lpm_classify_node) = { + .function = gbp_ip6_lpm_classify, + .name = "ip6-gpb-lpm-classify", + .vector_size = sizeof (u32), + .format_trace = format_gbp_classify_trace, + .type = VLIB_NODE_TYPE_INTERNAL, + + .n_errors = 0, + .n_next_nodes = 1, + .next_nodes = { + [GPB_LPM_CLASSIFY_DROP] = "ip6-drop" + }, +}; + +VLIB_NODE_FUNCTION_MULTIARCH (gbp_ip6_lpm_classify_node, gbp_ip6_lpm_classify); + +VNET_FEATURE_INIT (gbp_ip4_lpm_classify_feat_node, static) = +{ + .arc_name = "ip4-unicast", + .node_name = "ip4-gbp-lpm-classify", + .runs_before = VNET_FEATURES ("nat44-out2in"), +}; +VNET_FEATURE_INIT (gbp_ip6_lpm_classify_feat_node, static) = +{ + .arc_name = "ip6-unicast", + .node_name = "ip6-gbp-lpm-classify", + .runs_before = VNET_FEATURES ("nat66-out2in"), +}; + +/* *INDENT-ON* */ + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */