diff options
Diffstat (limited to 'src/plugins/gbp/gbp_fwd.c')
| -rw-r--r-- | src/plugins/gbp/gbp_fwd.c | 195 |
1 files changed, 195 insertions, 0 deletions
diff --git a/src/plugins/gbp/gbp_fwd.c b/src/plugins/gbp/gbp_fwd.c new file mode 100644 index 00000000000..fec5703d014 --- /dev/null +++ b/src/plugins/gbp/gbp_fwd.c @@ -0,0 +1,195 @@ +/* + * 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> + +/** + * Grouping of global data for the GBP source EPG classification feature + */ +typedef struct gbp_fwd_main_t_ +{ + /** + * Next nodes for L2 output features + */ + u32 l2_input_feat_next[32]; +} gbp_fwd_main_t; + +static gbp_fwd_main_t gbp_fwd_main; + +#define foreach_gbp_fwd \ + _(DROP, "drop") \ + _(OUTPUT, "output") + +typedef enum +{ +#define _(sym,str) GBP_FWD_ERROR_##sym, + foreach_gbp_fwd +#undef _ + GBP_FWD_N_ERROR, +} gbp_fwd_error_t; + +static char *gbp_fwd_error_strings[] = { +#define _(sym,string) string, + foreach_gbp_fwd +#undef _ +}; + +typedef enum +{ +#define _(sym,str) GBP_FWD_NEXT_##sym, + foreach_gbp_fwd +#undef _ + GBP_FWD_N_NEXT, +} gbp_fwd_next_t; + +/** + * per-packet trace data + */ +typedef struct gbp_fwd_trace_t_ +{ + /* per-pkt trace data */ + epg_id_t src_epg; + u32 sw_if_index; +} gbp_fwd_trace_t; + +static uword +gbp_fwd (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) +{ + 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, src_epg; + gbp_fwd_next_t next0; + vlib_buffer_t *b0; + + next0 = GBP_FWD_NEXT_DROP; + 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); + + /* + * lookup the uplink based on src EPG + */ + src_epg = vnet_buffer2 (b0)->gbp.src_epg; + + sw_if_index0 = gbp_epg_itf_lookup (src_epg); + + if (~0 != sw_if_index0) + { + vnet_buffer (b0)->sw_if_index[VLIB_TX] = sw_if_index0; + + next0 = GBP_FWD_NEXT_OUTPUT; + } + /* + * else + * don't know the uplink interface for this EPG => drop + */ + + if (PREDICT_FALSE ((b0->flags & VLIB_BUFFER_IS_TRACED))) + { + gbp_fwd_trace_t *t = vlib_add_trace (vm, node, b0, sizeof (*t)); + t->src_epg = src_epg; + t->sw_if_index = sw_if_index0; + } + + /* verify speculative enqueue, maybe switch current next frame */ + 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; +} + +/* packet trace format function */ +static u8 * +format_gbp_fwd_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_fwd_trace_t *t = va_arg (*args, gbp_fwd_trace_t *); + + s = format (s, "src-epg:%d", t->src_epg); + + return s; +} + +/* *INDENT-OFF* */ +VLIB_REGISTER_NODE (gbp_fwd_node) = { + .function = gbp_fwd, + .name = "gbp-fwd", + .vector_size = sizeof (u32), + .format_trace = format_gbp_fwd_trace, + .type = VLIB_NODE_TYPE_INTERNAL, + + .n_errors = ARRAY_LEN(gbp_fwd_error_strings), + .error_strings = gbp_fwd_error_strings, + + .n_next_nodes = GBP_FWD_N_NEXT, + + .next_nodes = { + [GBP_FWD_NEXT_DROP] = "error-drop", + [GBP_FWD_NEXT_OUTPUT] = "l2-output", + }, +}; + +VLIB_NODE_FUNCTION_MULTIARCH (gbp_fwd_node, gbp_fwd); + +/* *INDENT-ON* */ + +static clib_error_t * +gbp_fwd_init (vlib_main_t * vm) +{ + gbp_fwd_main_t *gpm = &gbp_fwd_main; + + /* Initialize the feature next-node indices */ + feat_bitmap_init_next_nodes (vm, + gbp_fwd_node.index, + L2INPUT_N_FEAT, + l2input_get_feat_names (), + gpm->l2_input_feat_next); + + return 0; +} + +VLIB_INIT_FUNCTION (gbp_fwd_init); + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ |