2 * Copyright (c) 2018 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
17 * @brief NAT44 worker handoff
20 #include <vlib/vlib.h>
21 #include <vnet/vnet.h>
22 #include <vnet/handoff.h>
23 #include <vnet/fib/ip4_fib.h>
24 #include <vppinfra/error.h>
26 #include <nat/nat_inlines.h>
30 u32 next_worker_index;
34 } nat44_handoff_trace_t;
36 static char *nat44_handoff_error_strings[] = {
37 #define _(sym,string) string,
38 foreach_nat44_handoff_error
43 format_nat44_handoff_trace (u8 * s, va_list * args)
45 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
46 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
47 nat44_handoff_trace_t *t = va_arg (*args, nat44_handoff_trace_t *);
50 tag = t->in2out ? "IN2OUT" : "OUT2IN";
51 output = t->output ? "OUTPUT-FEATURE" : "";
53 format (s, "NAT44_%s_WORKER_HANDOFF %s: next-worker %d trace index %d",
54 tag, output, t->next_worker_index, t->trace_index);
60 nat44_worker_handoff_fn_inline (vlib_main_t * vm,
61 vlib_node_runtime_t * node,
62 vlib_frame_t * frame, u8 is_output,
65 u32 n_enq, n_left_from, *from, do_handoff = 0, same_worker = 0;
67 u16 thread_indices[VLIB_FRAME_SIZE], *ti = thread_indices;
68 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
69 snat_main_t *sm = &snat_main;
71 u32 fq_index, thread_index = vm->thread_index;
73 from = vlib_frame_vector_args (frame);
74 n_left_from = frame->n_vectors;
76 vlib_get_buffers (vm, from, b, n_left_from);
80 fq_index = is_output ? sm->fq_in2out_output_index : sm->fq_in2out_index;
84 fq_index = sm->fq_out2in_index;
87 while (n_left_from >= 4)
89 u32 arc_next0, arc_next1, arc_next2, arc_next3;
90 u32 sw_if_index0, sw_if_index1, sw_if_index2, sw_if_index3;
91 u32 rx_fib_index0, rx_fib_index1, rx_fib_index2, rx_fib_index3;
92 u32 iph_offset0 = 0, iph_offset1 = 0, iph_offset2 = 0, iph_offset3 = 0;
93 ip4_header_t *ip0, *ip1, *ip2, *ip3;
95 if (PREDICT_TRUE (n_left_from >= 8))
97 vlib_prefetch_buffer_header (b[4], LOAD);
98 vlib_prefetch_buffer_header (b[5], LOAD);
99 vlib_prefetch_buffer_header (b[6], LOAD);
100 vlib_prefetch_buffer_header (b[7], LOAD);
101 CLIB_PREFETCH (&b[4]->data, CLIB_CACHE_LINE_BYTES, LOAD);
102 CLIB_PREFETCH (&b[5]->data, CLIB_CACHE_LINE_BYTES, LOAD);
103 CLIB_PREFETCH (&b[6]->data, CLIB_CACHE_LINE_BYTES, LOAD);
104 CLIB_PREFETCH (&b[7]->data, CLIB_CACHE_LINE_BYTES, LOAD);
109 iph_offset0 = vnet_buffer (b[0])->ip.save_rewrite_length;
110 iph_offset1 = vnet_buffer (b[1])->ip.save_rewrite_length;
111 iph_offset2 = vnet_buffer (b[2])->ip.save_rewrite_length;
112 iph_offset3 = vnet_buffer (b[3])->ip.save_rewrite_length;
115 ip0 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b[0]) +
117 ip1 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b[1]) +
119 ip2 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b[2]) +
121 ip3 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b[3]) +
124 vnet_feature_next (&arc_next0, b[0]);
125 vnet_feature_next (&arc_next1, b[1]);
126 vnet_feature_next (&arc_next2, b[2]);
127 vnet_feature_next (&arc_next3, b[3]);
129 vnet_buffer2 (b[0])->nat.arc_next = arc_next0;
130 vnet_buffer2 (b[1])->nat.arc_next = arc_next1;
131 vnet_buffer2 (b[2])->nat.arc_next = arc_next2;
132 vnet_buffer2 (b[3])->nat.arc_next = arc_next3;
134 sw_if_index0 = vnet_buffer (b[0])->sw_if_index[VLIB_RX];
135 sw_if_index1 = vnet_buffer (b[1])->sw_if_index[VLIB_RX];
136 sw_if_index2 = vnet_buffer (b[2])->sw_if_index[VLIB_RX];
137 sw_if_index3 = vnet_buffer (b[3])->sw_if_index[VLIB_RX];
139 rx_fib_index0 = ip4_fib_table_get_index_for_sw_if_index (sw_if_index0);
140 rx_fib_index1 = ip4_fib_table_get_index_for_sw_if_index (sw_if_index1);
141 rx_fib_index2 = ip4_fib_table_get_index_for_sw_if_index (sw_if_index2);
142 rx_fib_index3 = ip4_fib_table_get_index_for_sw_if_index (sw_if_index3);
146 ti[0] = sm->worker_in2out_cb (ip0, rx_fib_index0, is_output);
147 ti[1] = sm->worker_in2out_cb (ip1, rx_fib_index1, is_output);
148 ti[2] = sm->worker_in2out_cb (ip2, rx_fib_index2, is_output);
149 ti[3] = sm->worker_in2out_cb (ip3, rx_fib_index3, is_output);
153 ti[0] = sm->worker_out2in_cb (b[0], ip0, rx_fib_index0, is_output);
154 ti[1] = sm->worker_out2in_cb (b[1], ip1, rx_fib_index1, is_output);
155 ti[2] = sm->worker_out2in_cb (b[2], ip2, rx_fib_index2, is_output);
156 ti[3] = sm->worker_out2in_cb (b[3], ip3, rx_fib_index3, is_output);
159 if (ti[0] == thread_index)
164 if (ti[1] == thread_index)
169 if (ti[2] == thread_index)
174 if (ti[3] == thread_index)
184 while (n_left_from > 0)
194 iph_offset0 = vnet_buffer (b[0])->ip.save_rewrite_length;
196 ip0 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b[0]) +
199 vnet_feature_next (&arc_next0, b[0]);
200 vnet_buffer2 (b[0])->nat.arc_next = arc_next0;
202 sw_if_index0 = vnet_buffer (b[0])->sw_if_index[VLIB_RX];
203 rx_fib_index0 = ip4_fib_table_get_index_for_sw_if_index (sw_if_index0);
207 ti[0] = sm->worker_in2out_cb (ip0, rx_fib_index0, is_output);
211 ti[0] = sm->worker_out2in_cb (b[0], ip0, rx_fib_index0, is_output);
214 if (ti[0] == thread_index)
224 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)))
230 for (i = 0; i < frame->n_vectors; i++)
232 if (b[0]->flags & VLIB_BUFFER_IS_TRACED)
234 nat44_handoff_trace_t *t =
235 vlib_add_trace (vm, node, b[0], sizeof (*t));
236 t->next_worker_index = ti[0];
237 t->trace_index = vlib_buffer_get_trace_index (b[0]);
238 t->in2out = is_in2out;
239 t->output = is_output;
249 n_enq = vlib_buffer_enqueue_to_thread (vm, fq_index, from, thread_indices,
250 frame->n_vectors, 1);
252 if (n_enq < frame->n_vectors)
254 vlib_node_increment_counter (vm, node->node_index,
255 NAT44_HANDOFF_ERROR_CONGESTION_DROP,
256 frame->n_vectors - n_enq);
259 vlib_node_increment_counter (vm, node->node_index,
260 NAT44_HANDOFF_ERROR_SAME_WORKER, same_worker);
261 vlib_node_increment_counter (vm, node->node_index,
262 NAT44_HANDOFF_ERROR_DO_HANDOFF, do_handoff);
263 return frame->n_vectors;
266 VLIB_NODE_FN (snat_in2out_worker_handoff_node) (vlib_main_t * vm,
267 vlib_node_runtime_t * node,
268 vlib_frame_t * frame)
270 return nat44_worker_handoff_fn_inline (vm, node, frame, 0, 1);
274 VLIB_REGISTER_NODE (snat_in2out_worker_handoff_node) = {
275 .name = "nat44-in2out-worker-handoff",
276 .vector_size = sizeof (u32),
277 .sibling_of = "nat-default",
278 .format_trace = format_nat44_handoff_trace,
279 .type = VLIB_NODE_TYPE_INTERNAL,
280 .n_errors = ARRAY_LEN(nat44_handoff_error_strings),
281 .error_strings = nat44_handoff_error_strings,
285 VLIB_NODE_FN (snat_in2out_output_worker_handoff_node) (vlib_main_t * vm,
286 vlib_node_runtime_t *
288 vlib_frame_t * frame)
290 return nat44_worker_handoff_fn_inline (vm, node, frame, 1, 1);
294 VLIB_REGISTER_NODE (snat_in2out_output_worker_handoff_node) = {
295 .name = "nat44-in2out-output-worker-handoff",
296 .vector_size = sizeof (u32),
297 .sibling_of = "nat-default",
298 .format_trace = format_nat44_handoff_trace,
299 .type = VLIB_NODE_TYPE_INTERNAL,
300 .n_errors = ARRAY_LEN(nat44_handoff_error_strings),
301 .error_strings = nat44_handoff_error_strings,
305 VLIB_NODE_FN (snat_out2in_worker_handoff_node) (vlib_main_t * vm,
306 vlib_node_runtime_t * node,
307 vlib_frame_t * frame)
309 return nat44_worker_handoff_fn_inline (vm, node, frame, 0, 0);
313 VLIB_REGISTER_NODE (snat_out2in_worker_handoff_node) = {
314 .name = "nat44-out2in-worker-handoff",
315 .vector_size = sizeof (u32),
316 .sibling_of = "nat-default",
317 .format_trace = format_nat44_handoff_trace,
318 .type = VLIB_NODE_TYPE_INTERNAL,
319 .n_errors = ARRAY_LEN(nat44_handoff_error_strings),
320 .error_strings = nat44_handoff_error_strings,
325 * fd.io coding-style-patch-verification: ON
328 * eval: (c-set-style "gnu")