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/nat44-ed/nat44_ed.h>
27 #include <nat/nat44-ed/nat44_ed_inlines.h>
31 u32 next_worker_index;
35 } nat44_handoff_trace_t;
37 #define foreach_nat44_handoff_error \
38 _ (CONGESTION_DROP, "congestion drop") \
39 _ (SAME_WORKER, "same worker") \
40 _ (DO_HANDOFF, "do handoff")
44 #define _(sym, str) NAT44_HANDOFF_ERROR_##sym,
45 foreach_nat44_handoff_error
47 NAT44_HANDOFF_N_ERROR,
48 } nat44_handoff_error_t;
50 static char *nat44_handoff_error_strings[] = {
51 #define _(sym,string) string,
52 foreach_nat44_handoff_error
57 format_nat44_handoff_trace (u8 * s, va_list * args)
59 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
60 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
61 nat44_handoff_trace_t *t = va_arg (*args, nat44_handoff_trace_t *);
64 tag = t->in2out ? "IN2OUT" : "OUT2IN";
65 output = t->output ? "OUTPUT-FEATURE" : "";
67 format (s, "NAT44_%s_WORKER_HANDOFF %s: next-worker %d trace index %d",
68 tag, output, t->next_worker_index, t->trace_index);
74 nat44_worker_handoff_fn_inline (vlib_main_t * vm,
75 vlib_node_runtime_t * node,
76 vlib_frame_t * frame, u8 is_output,
79 u32 n_enq, n_left_from, *from, do_handoff = 0, same_worker = 0;
81 u16 thread_indices[VLIB_FRAME_SIZE], *ti = thread_indices;
82 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
83 snat_main_t *sm = &snat_main;
85 u32 fq_index, thread_index = vm->thread_index;
87 from = vlib_frame_vector_args (frame);
88 n_left_from = frame->n_vectors;
90 vlib_get_buffers (vm, from, b, n_left_from);
94 fq_index = is_output ? sm->fq_in2out_output_index : sm->fq_in2out_index;
98 fq_index = sm->fq_out2in_index;
101 while (n_left_from >= 4)
103 u32 arc_next0, arc_next1, arc_next2, arc_next3;
104 u32 sw_if_index0, sw_if_index1, sw_if_index2, sw_if_index3;
105 u32 rx_fib_index0, rx_fib_index1, rx_fib_index2, rx_fib_index3;
106 u32 iph_offset0 = 0, iph_offset1 = 0, iph_offset2 = 0, iph_offset3 = 0;
107 ip4_header_t *ip0, *ip1, *ip2, *ip3;
109 if (PREDICT_TRUE (n_left_from >= 8))
111 vlib_prefetch_buffer_header (b[4], LOAD);
112 vlib_prefetch_buffer_header (b[5], LOAD);
113 vlib_prefetch_buffer_header (b[6], LOAD);
114 vlib_prefetch_buffer_header (b[7], LOAD);
115 CLIB_PREFETCH (&b[4]->data, CLIB_CACHE_LINE_BYTES, LOAD);
116 CLIB_PREFETCH (&b[5]->data, CLIB_CACHE_LINE_BYTES, LOAD);
117 CLIB_PREFETCH (&b[6]->data, CLIB_CACHE_LINE_BYTES, LOAD);
118 CLIB_PREFETCH (&b[7]->data, CLIB_CACHE_LINE_BYTES, LOAD);
123 iph_offset0 = vnet_buffer (b[0])->ip.save_rewrite_length;
124 iph_offset1 = vnet_buffer (b[1])->ip.save_rewrite_length;
125 iph_offset2 = vnet_buffer (b[2])->ip.save_rewrite_length;
126 iph_offset3 = vnet_buffer (b[3])->ip.save_rewrite_length;
129 ip0 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b[0]) +
131 ip1 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b[1]) +
133 ip2 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b[2]) +
135 ip3 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b[3]) +
138 vnet_feature_next (&arc_next0, b[0]);
139 vnet_feature_next (&arc_next1, b[1]);
140 vnet_feature_next (&arc_next2, b[2]);
141 vnet_feature_next (&arc_next3, b[3]);
143 vnet_buffer2 (b[0])->nat.arc_next = arc_next0;
144 vnet_buffer2 (b[1])->nat.arc_next = arc_next1;
145 vnet_buffer2 (b[2])->nat.arc_next = arc_next2;
146 vnet_buffer2 (b[3])->nat.arc_next = arc_next3;
148 sw_if_index0 = vnet_buffer (b[0])->sw_if_index[VLIB_RX];
149 sw_if_index1 = vnet_buffer (b[1])->sw_if_index[VLIB_RX];
150 sw_if_index2 = vnet_buffer (b[2])->sw_if_index[VLIB_RX];
151 sw_if_index3 = vnet_buffer (b[3])->sw_if_index[VLIB_RX];
153 rx_fib_index0 = ip4_fib_table_get_index_for_sw_if_index (sw_if_index0);
154 rx_fib_index1 = ip4_fib_table_get_index_for_sw_if_index (sw_if_index1);
155 rx_fib_index2 = ip4_fib_table_get_index_for_sw_if_index (sw_if_index2);
156 rx_fib_index3 = ip4_fib_table_get_index_for_sw_if_index (sw_if_index3);
160 ti[0] = sm->worker_in2out_cb (ip0, rx_fib_index0, is_output);
161 ti[1] = sm->worker_in2out_cb (ip1, rx_fib_index1, is_output);
162 ti[2] = sm->worker_in2out_cb (ip2, rx_fib_index2, is_output);
163 ti[3] = sm->worker_in2out_cb (ip3, rx_fib_index3, is_output);
167 ti[0] = sm->worker_out2in_cb (b[0], ip0, rx_fib_index0, is_output);
168 ti[1] = sm->worker_out2in_cb (b[1], ip1, rx_fib_index1, is_output);
169 ti[2] = sm->worker_out2in_cb (b[2], ip2, rx_fib_index2, is_output);
170 ti[3] = sm->worker_out2in_cb (b[3], ip3, rx_fib_index3, is_output);
173 if (ti[0] == thread_index)
178 if (ti[1] == thread_index)
183 if (ti[2] == thread_index)
188 if (ti[3] == thread_index)
198 while (n_left_from > 0)
208 iph_offset0 = vnet_buffer (b[0])->ip.save_rewrite_length;
210 ip0 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b[0]) +
213 vnet_feature_next (&arc_next0, b[0]);
214 vnet_buffer2 (b[0])->nat.arc_next = arc_next0;
216 sw_if_index0 = vnet_buffer (b[0])->sw_if_index[VLIB_RX];
217 rx_fib_index0 = ip4_fib_table_get_index_for_sw_if_index (sw_if_index0);
221 ti[0] = sm->worker_in2out_cb (ip0, rx_fib_index0, is_output);
225 ti[0] = sm->worker_out2in_cb (b[0], ip0, rx_fib_index0, is_output);
228 if (ti[0] == thread_index)
238 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)))
244 for (i = 0; i < frame->n_vectors; i++)
246 if (b[0]->flags & VLIB_BUFFER_IS_TRACED)
248 nat44_handoff_trace_t *t =
249 vlib_add_trace (vm, node, b[0], sizeof (*t));
250 t->next_worker_index = ti[0];
251 t->trace_index = vlib_buffer_get_trace_index (b[0]);
252 t->in2out = is_in2out;
253 t->output = is_output;
263 n_enq = vlib_buffer_enqueue_to_thread (vm, fq_index, from, thread_indices,
264 frame->n_vectors, 1);
266 if (n_enq < frame->n_vectors)
268 vlib_node_increment_counter (vm, node->node_index,
269 NAT44_HANDOFF_ERROR_CONGESTION_DROP,
270 frame->n_vectors - n_enq);
273 vlib_node_increment_counter (vm, node->node_index,
274 NAT44_HANDOFF_ERROR_SAME_WORKER, same_worker);
275 vlib_node_increment_counter (vm, node->node_index,
276 NAT44_HANDOFF_ERROR_DO_HANDOFF, do_handoff);
277 return frame->n_vectors;
280 VLIB_NODE_FN (snat_in2out_worker_handoff_node) (vlib_main_t * vm,
281 vlib_node_runtime_t * node,
282 vlib_frame_t * frame)
284 return nat44_worker_handoff_fn_inline (vm, node, frame, 0, 1);
288 VLIB_REGISTER_NODE (snat_in2out_worker_handoff_node) = {
289 .name = "nat44-in2out-worker-handoff",
290 .vector_size = sizeof (u32),
291 .sibling_of = "nat-default",
292 .format_trace = format_nat44_handoff_trace,
293 .type = VLIB_NODE_TYPE_INTERNAL,
294 .n_errors = ARRAY_LEN(nat44_handoff_error_strings),
295 .error_strings = nat44_handoff_error_strings,
299 VLIB_NODE_FN (snat_in2out_output_worker_handoff_node) (vlib_main_t * vm,
300 vlib_node_runtime_t *
302 vlib_frame_t * frame)
304 return nat44_worker_handoff_fn_inline (vm, node, frame, 1, 1);
308 VLIB_REGISTER_NODE (snat_in2out_output_worker_handoff_node) = {
309 .name = "nat44-in2out-output-worker-handoff",
310 .vector_size = sizeof (u32),
311 .sibling_of = "nat-default",
312 .format_trace = format_nat44_handoff_trace,
313 .type = VLIB_NODE_TYPE_INTERNAL,
314 .n_errors = ARRAY_LEN(nat44_handoff_error_strings),
315 .error_strings = nat44_handoff_error_strings,
319 VLIB_NODE_FN (snat_out2in_worker_handoff_node) (vlib_main_t * vm,
320 vlib_node_runtime_t * node,
321 vlib_frame_t * frame)
323 return nat44_worker_handoff_fn_inline (vm, node, frame, 0, 0);
327 VLIB_REGISTER_NODE (snat_out2in_worker_handoff_node) = {
328 .name = "nat44-out2in-worker-handoff",
329 .vector_size = sizeof (u32),
330 .sibling_of = "nat-default",
331 .format_trace = format_nat44_handoff_trace,
332 .type = VLIB_NODE_TYPE_INTERNAL,
333 .n_errors = ARRAY_LEN(nat44_handoff_error_strings),
334 .error_strings = nat44_handoff_error_strings,
339 * fd.io coding-style-patch-verification: ON
342 * eval: (c-set-style "gnu")