diff options
Diffstat (limited to 'src/plugins/gbp/gbp_classify_node.c')
| -rw-r--r-- | src/plugins/gbp/gbp_classify_node.c | 542 |
1 files changed, 542 insertions, 0 deletions
diff --git a/src/plugins/gbp/gbp_classify_node.c b/src/plugins/gbp/gbp_classify_node.c new file mode 100644 index 00000000000..43fea769cce --- /dev/null +++ b/src/plugins/gbp/gbp_classify_node.c @@ -0,0 +1,542 @@ +/* + * gbp.h : Group Based Policy + * + * 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 <plugins/gbp/gbp.h> +#include <plugins/gbp/gbp_classify.h> +#include <plugins/gbp/gbp_policy_dpo.h> +#include <plugins/gbp/gbp_ext_itf.h> +#include <vnet/fib/ip4_fib.h> +#include <vnet/fib/ip6_fib.h> +#include <vnet/dpo/load_balance.h> +#include <vnet/l2/l2_input.h> +#include <vnet/l2/feat_bitmap.h> +#include <vnet/fib/fib_table.h> +#include <vnet/vxlan-gbp/vxlan_gbp_packet.h> + +/** + * per-packet trace data + */ +typedef struct gbp_classify_trace_t_ +{ + /* per-pkt trace data */ + epg_id_t src_epg; +} gbp_classify_trace_t; + +/* + * determine the SRC EPG form the input port + */ +always_inline uword +gbp_classify_inline (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame, + gbp_src_classify_type_t type, dpo_proto_t dproto) +{ + gbp_src_classify_main_t *gscm = &gbp_src_classify_main; + 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 next0, bi0, src_epg, sw_if_index0; + const gbp_endpoint_t *ge0; + 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; + + b0 = vlib_get_buffer (vm, bi0); + + sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX]; + vnet_buffer2 (b0)->gbp.flags = VXLAN_GBP_GPFLAGS_NONE; + + if (GBP_SRC_CLASSIFY_NULL == type) + { + src_epg = EPG_INVALID; + next0 = + vnet_l2_feature_next (b0, gscm->l2_input_feat_next[type], + L2INPUT_FEAT_GBP_NULL_CLASSIFY); + } + else + { + if (DPO_PROTO_ETHERNET == dproto) + { + const ethernet_header_t *h0; + + h0 = vlib_buffer_get_current (b0); + next0 = + vnet_l2_feature_next (b0, gscm->l2_input_feat_next[type], + L2INPUT_FEAT_GBP_SRC_CLASSIFY); + ge0 = gbp_endpoint_find_mac (h0->src_address, + vnet_buffer (b0)->l2.bd_index); + } + else if (DPO_PROTO_IP4 == dproto) + { + const ip4_header_t *h0; + + h0 = vlib_buffer_get_current (b0); + + ge0 = gbp_endpoint_find_ip4 + (&h0->src_address, + fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP4, + sw_if_index0)); + + + /* + * Go straight to looukp, do not pass go, do not collect $200 + */ + next0 = 0; + } + else if (DPO_PROTO_IP6 == dproto) + { + const ip6_header_t *h0; + + h0 = vlib_buffer_get_current (b0); + + ge0 = gbp_endpoint_find_ip6 + (&h0->src_address, + fib_table_get_index_for_sw_if_index (FIB_PROTOCOL_IP6, + sw_if_index0)); + + + /* + * Go straight to lookup, do not pass go, do not collect $200 + */ + next0 = 0; + } + else + { + ge0 = NULL; + next0 = 0; + ASSERT (0); + } + + if (PREDICT_TRUE (NULL != ge0)) + src_epg = ge0->ge_fwd.gef_epg_id; + else + src_epg = EPG_INVALID; + } + + vnet_buffer2 (b0)->gbp.src_epg = src_epg; + + 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_epg; + } + + 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; +} + +VLIB_NODE_FN (gbp_src_classify_node) (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame) +{ + return (gbp_classify_inline (vm, node, frame, + GBP_SRC_CLASSIFY_PORT, DPO_PROTO_ETHERNET)); +} + +VLIB_NODE_FN (gbp_null_classify_node) (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame) +{ + return (gbp_classify_inline (vm, node, frame, + GBP_SRC_CLASSIFY_NULL, DPO_PROTO_ETHERNET)); +} + +VLIB_NODE_FN (gbp_ip4_src_classify_node) (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame) +{ + return (gbp_classify_inline (vm, node, frame, + GBP_SRC_CLASSIFY_PORT, DPO_PROTO_IP4)); +} + +VLIB_NODE_FN (gbp_ip6_src_classify_node) (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame) +{ + return (gbp_classify_inline (vm, node, frame, + GBP_SRC_CLASSIFY_PORT, DPO_PROTO_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_null_classify_node) = { + .name = "gbp-null-classify", + .vector_size = sizeof (u32), + .format_trace = format_gbp_classify_trace, + .type = VLIB_NODE_TYPE_INTERNAL, + + .n_errors = 0, + .n_next_nodes = 0, +}; + +VLIB_REGISTER_NODE (gbp_src_classify_node) = { + .name = "gbp-src-classify", + .vector_size = sizeof (u32), + .format_trace = format_gbp_classify_trace, + .type = VLIB_NODE_TYPE_INTERNAL, + + .n_errors = 0, + .n_next_nodes = 0, +}; + +VLIB_REGISTER_NODE (gbp_ip4_src_classify_node) = { + .name = "ip4-gbp-src-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 = { + [0] = "ip4-lookup" + }, +}; + +VLIB_REGISTER_NODE (gbp_ip6_src_classify_node) = { + .name = "ip6-gbp-src-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 = { + [0] = "ip6-lookup" + }, +}; + +VNET_FEATURE_INIT (gbp_ip4_src_classify_feat_node, static) = +{ + .arc_name = "ip4-unicast", + .node_name = "ip4-gbp-src-classify", + .runs_before = VNET_FEATURES ("nat44-out2in"), +}; +VNET_FEATURE_INIT (gbp_ip6_src_classify_feat_node, static) = +{ + .arc_name = "ip6-unicast", + .node_name = "ip6-gbp-src-classify", + .runs_before = VNET_FEATURES ("nat66-out2in"), +}; + +/* *INDENT-ON* */ + +typedef enum gbp_lpm_classify_next_t_ +{ + GPB_LPM_CLASSIFY_DROP, +} gbp_lpm_classify_next_t; + +always_inline dpo_proto_t +ethertype_to_dpo_proto (const ethernet_header_t * eh0) +{ + u16 etype = clib_net_to_host_u16 (eh0->type); + + switch (etype) + { + case ETHERNET_TYPE_IP4: + return (DPO_PROTO_IP4); + case ETHERNET_TYPE_IP6: + return (DPO_PROTO_IP6); + case ETHERNET_TYPE_VLAN: + { + ethernet_vlan_header_t *vh0; + + vh0 = (ethernet_vlan_header_t *) (eh0 + 1); + + switch (clib_net_to_host_u16 (vh0->type)) + { + case ETHERNET_TYPE_IP4: + return (DPO_PROTO_IP4); + case ETHERNET_TYPE_IP6: + return (DPO_PROTO_IP6); + } + } + } + + return (DPO_PROTO_NONE); +} + +/* + * 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, + dpo_proto_t dproto, u8 is_recirc) +{ + gbp_src_classify_main_t *gscm = &gbp_src_classify_main; + 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_ext_itf_t *gx0; + 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; + ip4_0 = NULL; + ip6_0 = NULL; + next0 = GPB_LPM_CLASSIFY_DROP; + + b0 = vlib_get_buffer (vm, bi0); + + sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX]; + vnet_buffer2 (b0)->gbp.flags = VXLAN_GBP_GPFLAGS_NONE; + + if (DPO_PROTO_IP4 == dproto) + ip4_0 = vlib_buffer_get_current (b0); + else if (DPO_PROTO_IP6 == dproto) + ip6_0 = vlib_buffer_get_current (b0); + else if (DPO_PROTO_ETHERNET == dproto) + { + const ethernet_header_t *eh0; + + eh0 = vlib_buffer_get_current (b0); + + dproto = ethertype_to_dpo_proto (eh0); + + switch (dproto) + { + case DPO_PROTO_IP4: + ip4_0 = (vlib_buffer_get_current (b0) + + vnet_buffer (b0)->l2.l2_len); + break; + case DPO_PROTO_IP6: + ip6_0 = (vlib_buffer_get_current (b0) + + vnet_buffer (b0)->l2.l2_len); + break; + default: + /* not IP so no LPM classify possible */ + src_epg0 = EPG_INVALID; + goto trace; + } + } + + if (is_recirc) + { + gr0 = gbp_recirc_get (sw_if_index0); + fib_index0 = gr0->gr_fib_index[dproto]; + + vnet_feature_next (&next0, b0); + } + else + { + gx0 = gbp_ext_itf_get (sw_if_index0); + fib_index0 = gx0->gx_fib_index[dproto]; + + next0 = vnet_l2_feature_next + (b0, gscm->l2_input_feat_next[GBP_SRC_CLASSIFY_LPM], + L2INPUT_FEAT_GBP_LPM_CLASSIFY); + } + + if (DPO_PROTO_IP4 == dproto) + { + lbi0 = ip4_fib_forwarding_lookup (fib_index0, + &ip4_0->src_address); + } + else if (DPO_PROTO_IP6 == dproto) + { + lbi0 = ip6_fib_table_fwding_lookup (&ip6_main, fib_index0, + &ip6_0->src_address); + } + else + { + /* not IP so no LPM classify possible */ + src_epg0 = EPG_INVALID; + goto trace; + } + 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 (dpo0->dpoi_index); + src_epg0 = gpd0->gpd_epg; + } + else + { + /* could not classify => drop */ + src_epg0 = EPG_INVALID; + next0 = GPB_LPM_CLASSIFY_DROP; + } + + trace: + 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; +} + +VLIB_NODE_FN (gbp_ip4_lpm_classify_node) (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame) +{ + return (gbp_lpm_classify_inline (vm, node, frame, DPO_PROTO_IP4, 1)); +} + +VLIB_NODE_FN (gbp_ip6_lpm_classify_node) (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame) +{ + return (gbp_lpm_classify_inline (vm, node, frame, DPO_PROTO_IP6, 1)); +} + +VLIB_NODE_FN (gbp_l2_lpm_classify_node) (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame) +{ + return (gbp_lpm_classify_inline (vm, node, frame, DPO_PROTO_ETHERNET, 0)); +} + +/* *INDENT-OFF* */ +VLIB_REGISTER_NODE (gbp_ip4_lpm_classify_node) = { + .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_REGISTER_NODE (gbp_ip6_lpm_classify_node) = { + .name = "ip6-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] = "ip6-drop" + }, +}; + +VLIB_REGISTER_NODE (gbp_l2_lpm_classify_node) = { + .name = "l2-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] = "error-drop" + }, +}; + +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: + */ |