diff options
Diffstat (limited to 'src/vnet/bier/bier_disp_dispatch_node.c')
| -rw-r--r-- | src/vnet/bier/bier_disp_dispatch_node.c | 150 |
1 files changed, 150 insertions, 0 deletions
diff --git a/src/vnet/bier/bier_disp_dispatch_node.c b/src/vnet/bier/bier_disp_dispatch_node.c new file mode 100644 index 00000000000..a00c2eea5f9 --- /dev/null +++ b/src/vnet/bier/bier_disp_dispatch_node.c @@ -0,0 +1,150 @@ +/* + * Copyright (c) 2016 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/bier/bier_disp_entry.h> +#include <vnet/bier/bier_hdr_inlines.h> + +/** + * @brief A struct to hold tracing information for the MPLS label imposition + * node. + */ +typedef struct bier_disp_dispatch_trace_t_ +{ + /** + * BIER payload protocol used to dispatch + */ + bier_hdr_proto_id_t pproto; + + /** + * RPF-ID packet is tagged with + */ + u32 rpf_id; +} bier_disp_dispatch_trace_t; + +always_inline uword +bier_disp_dispatch_inline (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * from_frame) +{ + 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) + { + bier_hdr_proto_id_t pproto0; + bier_disp_entry_t *bde0; + u32 next0, bi0, bdei0; + const dpo_id_t *dpo0; + vlib_buffer_t * b0; + bier_hdr_t *hdr0; + u32 entropy0; + + 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); + bdei0 = vnet_buffer(b0)->ip.adj_index[VLIB_TX]; + hdr0 = vlib_buffer_get_current(b0); + bde0 = bier_disp_entry_get(bdei0); + + /* + * header is in network order - flip it, we are about to + * consume it anyway + */ + bier_hdr_ntoh(hdr0); + pproto0 = bier_hdr_get_proto_id(hdr0); + entropy0 = bier_hdr_get_entropy(hdr0); + + /* + * strip the header and copy the entropy value into + * the packets flow-hash field + * DSCP mumble mumble... + */ + vlib_buffer_advance(b0, (vnet_buffer(b0)->bier.n_bytes + + sizeof(*hdr0))); + vnet_buffer(b0)->ip.flow_hash = entropy0; + + /* + * use the payload proto to dispatch to the + * correct stacked DPO. + */ + dpo0 = &bde0->bde_fwd[pproto0].bde_dpo; + next0 = dpo0->dpoi_next_node; + vnet_buffer(b0)->ip.adj_index[VLIB_TX] = dpo0->dpoi_index; + vnet_buffer(b0)->ip.rpf_id = bde0->bde_fwd[pproto0].bde_rpf_id; + + if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED)) + { + bier_disp_dispatch_trace_t *tr = + vlib_add_trace (vm, node, b0, sizeof (*tr)); + tr->pproto = pproto0; + tr->rpf_id = vnet_buffer(b0)->ip.rpf_id; + } + + 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_bier_disp_dispatch_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 *); + bier_disp_dispatch_trace_t * t; + + t = va_arg (*args, bier_disp_dispatch_trace_t *); + s = format (s, "%U", format_bier_hdr_proto, t->pproto); + + return (s); +} + +static uword +bier_disp_dispatch (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame) +{ + return (bier_disp_dispatch_inline(vm, node, frame)); +} + +VLIB_REGISTER_NODE (bier_disp_dispatch_node) = { + .function = bier_disp_dispatch, + .name = "bier-disp-dispatch", + .vector_size = sizeof (u32), + + .format_trace = format_bier_disp_dispatch_trace, + .n_next_nodes = 1, + .next_nodes = { + [0] = "bier-drop", + } +}; +VLIB_NODE_FUNCTION_MULTIARCH (bier_disp_dispatch_node, bier_disp_dispatch) |