/* * node.c - skeleton vpp engine plug-in dual-loop node skeleton * * Copyright (c) * 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 typedef struct { int current_thread; } handoffdemo_trace_t; /* packet trace format function */ static u8 * format_handoffdemo_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 *); handoffdemo_trace_t *t = va_arg (*args, handoffdemo_trace_t *); s = format (s, "HANDOFFDEMO: current thread %d", t->current_thread); return s; } vlib_node_registration_t handoffdemo_node; #define foreach_handoffdemo_error \ _(HANDED_OFF, "packets handed off processed") \ _(CONGESTION_DROP, "handoff queue congestion drops") \ _(COMPLETE, "completed packets") typedef enum { #define _(sym,str) HANDOFFDEMO_ERROR_##sym, foreach_handoffdemo_error #undef _ HANDOFFDEMO_N_ERROR, } handoffdemo_error_t; static char *handoffdemo_error_strings[] = { #define _(sym,string) string, foreach_handoffdemo_error #undef _ }; typedef enum { HANDOFFDEMO_NEXT_DROP, HANDOFFDEMO_N_NEXT, } handoffdemo_next_t; always_inline uword handoffdemo_inline (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame, int which, int is_trace) { handoffdemo_main_t *hmp = &handoffdemo_main; u32 n_left_from, *from; u32 error0 = node->errors[HANDOFFDEMO_ERROR_COMPLETE]; vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b; u16 thread_indices[VLIB_FRAME_SIZE]; u16 nexts[VLIB_FRAME_SIZE], *next; u32 n_enq; int i; from = vlib_frame_vector_args (frame); n_left_from = frame->n_vectors; vlib_get_buffers (vm, from, bufs, n_left_from); next = nexts; b = bufs; /* First thread */ if (which == 1) { for (i = 0; i < frame->n_vectors; i++) { /* Pick a thread to handle this packet */ thread_indices[i] = 2; if (is_trace && (b[0]->flags & VLIB_BUFFER_IS_TRACED)) { handoffdemo_trace_t *t = vlib_add_trace (vm, node, b[0], sizeof (*t)); t->current_thread = vm->thread_index; } b += 1; next += 1; n_left_from -= 1; } /* Enqueue buffers to threads */ n_enq = vlib_buffer_enqueue_to_thread (vm, hmp->frame_queue_index, from, thread_indices, frame->n_vectors, 1 /* drop on congestion */ ); if (n_enq < frame->n_vectors) vlib_node_increment_counter (vm, node->node_index, HANDOFFDEMO_ERROR_CONGESTION_DROP, frame->n_vectors - n_enq); vlib_node_increment_counter (vm, node->node_index, HANDOFFDEMO_ERROR_HANDED_OFF, n_enq); return frame->n_vectors; } else /* Second thread */ { u32 *from; from = vlib_frame_vector_args (frame); n_left_from = frame->n_vectors; vlib_get_buffers (vm, from, bufs, n_left_from); next = nexts; b = bufs; while (n_left_from > 0) { if (is_trace && (b[0]->flags & VLIB_BUFFER_IS_TRACED)) { handoffdemo_trace_t *t = vlib_add_trace (vm, node, b[0], sizeof (*t)); t->current_thread = vm->thread_index; } next[0] = HANDOFFDEMO_NEXT_DROP; b[0]->error = error0; next++; b++; n_left_from--; } vlib_buffer_enqueue_to_next (vm, node, from, (u16 *) nexts, frame->n_vectors); } return frame->n_vectors; } static uword handoffdemo_node_1_fn (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) { if (PREDICT_FALSE (node->flags & VLIB_NODE_FLAG_TRACE)) return handoffdemo_inline (vm, node, frame, 1 /* which */ , 1 /* is_trace */ ); else return handoffdemo_inline (vm, node, frame, 1 /* which */ , 0 /* is_trace */ ); } /* *INDENT-OFF* */ VLIB_REGISTER_NODE (handoffdemo_node_1) = { .name = "handoffdemo-1", .function = handoffdemo_node_1_fn, .vector_size = sizeof (u32), .format_trace = format_handoffdemo_trace, .type = VLIB_NODE_TYPE_INTERNAL, .n_errors = ARRAY_LEN(handoffdemo_error_strings), .error_strings = handoffdemo_error_strings, .n_next_nodes = HANDOFFDEMO_N_NEXT, /* edit / add dispositions here */ .next_nodes = { [HANDOFFDEMO_NEXT_DROP] = "error-drop", }, }; /* *INDENT-ON* */ uword handoffdemo_node_2_fn (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) { if (PREDICT_FALSE (node->flags & VLIB_NODE_FLAG_TRACE)) return handoffdemo_inline (vm, node, frame, 2 /* which */ , 1 /* is_trace */ ); else return handoffdemo_inline (vm, node, frame, 2 /* which */ , 0 /* is_trace */ ); } /* *INDENT-OFF* */ VLIB_REGISTER_NODE (handoffdemo_node_2) = { .name = "handoffdemo-2", .function = handoffdemo_node_2_fn, .vector_size = sizeof (u32), .format_trace = format_handoffdemo_trace, .type = VLIB_NODE_TYPE_INTERNAL, .n_errors = ARRAY_LEN(handoffdemo_error_strings), .error_strings = handoffdemo_error_strings, .n_next_nodes = HANDOFFDEMO_N_NEXT, /* edit / add dispositions here */ .next_nodes = { [HANDOFFDEMO_NEXT_DROP] = "error-drop", }, }; /* *INDENT-ON* */ static clib_error_t * handoffdemo_node_init (vlib_main_t * vm) { handoffdemo_main_t *hmp = &handoffdemo_main; hmp->frame_queue_index = vlib_frame_queue_main_init (handoffdemo_node_2.index, 16); return 0; } VLIB_INIT_FUNCTION (handoffdemo_node_init); /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */