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>
29 u32 next_worker_index;
33 } nat44_handoff_trace_t;
35 #define foreach_nat44_handoff_error \
36 _(CONGESTION_DROP, "congestion drop") \
37 _(SAME_WORKER, "same worker") \
38 _(DO_HANDOFF, "do handoff")
42 #define _(sym,str) NAT44_HANDOFF_ERROR_##sym,
43 foreach_nat44_handoff_error
45 NAT44_HANDOFF_N_ERROR,
46 } nat44_handoff_error_t;
48 static char *nat44_handoff_error_strings[] = {
49 #define _(sym,string) string,
50 foreach_nat44_handoff_error
56 format_nat44_handoff_trace (u8 * s, va_list * args)
58 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
59 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
60 nat44_handoff_trace_t *t = va_arg (*args, nat44_handoff_trace_t *);
63 tag = t->in2out ? "IN2OUT" : "OUT2IN";
64 output = t->output ? "OUTPUT-FEATURE" : "";
66 format (s, "NAT44_%s_WORKER_HANDOFF %s: next-worker %d trace index %d",
67 tag, output, t->next_worker_index, t->trace_index);
73 nat44_worker_handoff_fn_inline (vlib_main_t * vm,
74 vlib_node_runtime_t * node,
75 vlib_frame_t * frame, u8 is_output,
78 u32 n_enq, n_left_from, *from, do_handoff = 0, same_worker = 0;
80 u16 thread_indices[VLIB_FRAME_SIZE], *ti = thread_indices;
81 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
82 snat_main_t *sm = &snat_main;
84 snat_get_worker_function_t *get_worker;
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;
95 get_worker = sm->worker_in2out_cb;
99 fq_index = sm->fq_out2in_index;
100 get_worker = sm->worker_out2in_cb;
103 while (n_left_from >= 4)
105 u32 sw_if_index0, sw_if_index1, sw_if_index2, sw_if_index3;
106 u32 rx_fib_index0, rx_fib_index1, rx_fib_index2, rx_fib_index3;
107 u32 iph_offset0 = 0, iph_offset1 = 0, iph_offset2 = 0, iph_offset3 = 0;
108 ip4_header_t *ip0, *ip1, *ip2, *ip3;
110 if (PREDICT_TRUE (n_left_from >= 8))
112 vlib_prefetch_buffer_header (b[4], STORE);
113 vlib_prefetch_buffer_header (b[5], STORE);
114 vlib_prefetch_buffer_header (b[6], STORE);
115 vlib_prefetch_buffer_header (b[7], STORE);
116 CLIB_PREFETCH (&b[4]->data, CLIB_CACHE_LINE_BYTES, STORE);
117 CLIB_PREFETCH (&b[5]->data, CLIB_CACHE_LINE_BYTES, STORE);
118 CLIB_PREFETCH (&b[6]->data, CLIB_CACHE_LINE_BYTES, STORE);
119 CLIB_PREFETCH (&b[7]->data, CLIB_CACHE_LINE_BYTES, STORE);
124 iph_offset0 = vnet_buffer (b[0])->ip.save_rewrite_length;
125 iph_offset1 = vnet_buffer (b[1])->ip.save_rewrite_length;
126 iph_offset2 = vnet_buffer (b[2])->ip.save_rewrite_length;
127 iph_offset3 = vnet_buffer (b[3])->ip.save_rewrite_length;
130 ip0 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b[0]) +
132 ip1 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b[1]) +
134 ip2 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b[2]) +
136 ip3 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b[3]) +
139 sw_if_index0 = vnet_buffer (b[0])->sw_if_index[VLIB_RX];
140 sw_if_index1 = vnet_buffer (b[1])->sw_if_index[VLIB_RX];
141 sw_if_index2 = vnet_buffer (b[2])->sw_if_index[VLIB_RX];
142 sw_if_index3 = vnet_buffer (b[3])->sw_if_index[VLIB_RX];
144 rx_fib_index0 = ip4_fib_table_get_index_for_sw_if_index (sw_if_index0);
145 rx_fib_index1 = ip4_fib_table_get_index_for_sw_if_index (sw_if_index1);
146 rx_fib_index2 = ip4_fib_table_get_index_for_sw_if_index (sw_if_index2);
147 rx_fib_index3 = ip4_fib_table_get_index_for_sw_if_index (sw_if_index3);
149 ti[0] = get_worker (ip0, rx_fib_index0, is_output);
150 ti[1] = get_worker (ip1, rx_fib_index1, is_output);
151 ti[2] = get_worker (ip2, rx_fib_index2, is_output);
152 ti[3] = get_worker (ip3, rx_fib_index3, is_output);
154 if (ti[0] == thread_index)
159 if (ti[1] == thread_index)
164 if (ti[2] == thread_index)
169 if (ti[3] == thread_index)
179 while (n_left_from > 0)
188 iph_offset0 = vnet_buffer (b[0])->ip.save_rewrite_length;
190 ip0 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b[0]) +
193 sw_if_index0 = vnet_buffer (b[0])->sw_if_index[VLIB_RX];
194 rx_fib_index0 = ip4_fib_table_get_index_for_sw_if_index (sw_if_index0);
196 ti[0] = get_worker (ip0, rx_fib_index0, is_output);
198 if (ti[0] == thread_index)
208 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)))
214 for (i = 0; i < frame->n_vectors; i++)
216 if (b[0]->flags & VLIB_BUFFER_IS_TRACED)
218 nat44_handoff_trace_t *t =
219 vlib_add_trace (vm, node, b[0], sizeof (*t));
220 t->next_worker_index = ti[0];
221 t->trace_index = vlib_buffer_get_trace_index (b[0]);
222 t->in2out = is_in2out;
223 t->output = is_output;
233 n_enq = vlib_buffer_enqueue_to_thread (vm, fq_index, from, thread_indices,
234 frame->n_vectors, 1);
236 if (n_enq < frame->n_vectors)
238 vlib_node_increment_counter (vm, node->node_index,
239 NAT44_HANDOFF_ERROR_CONGESTION_DROP,
240 frame->n_vectors - n_enq);
243 vlib_node_increment_counter (vm, node->node_index,
244 NAT44_HANDOFF_ERROR_SAME_WORKER, same_worker);
245 vlib_node_increment_counter (vm, node->node_index,
246 NAT44_HANDOFF_ERROR_DO_HANDOFF, do_handoff);
247 return frame->n_vectors;
252 VLIB_NODE_FN (snat_in2out_worker_handoff_node) (vlib_main_t * vm,
253 vlib_node_runtime_t * node,
254 vlib_frame_t * frame)
256 return nat44_worker_handoff_fn_inline (vm, node, frame, 0, 1);
260 VLIB_REGISTER_NODE (snat_in2out_worker_handoff_node) = {
261 .name = "nat44-in2out-worker-handoff",
262 .vector_size = sizeof (u32),
263 .format_trace = format_nat44_handoff_trace,
264 .type = VLIB_NODE_TYPE_INTERNAL,
265 .n_errors = ARRAY_LEN(nat44_handoff_error_strings),
266 .error_strings = nat44_handoff_error_strings,
274 VLIB_NODE_FN (snat_in2out_output_worker_handoff_node) (vlib_main_t * vm,
275 vlib_node_runtime_t *
277 vlib_frame_t * frame)
279 return nat44_worker_handoff_fn_inline (vm, node, frame, 1, 1);
283 VLIB_REGISTER_NODE (snat_in2out_output_worker_handoff_node) = {
284 .name = "nat44-in2out-output-worker-handoff",
285 .vector_size = sizeof (u32),
286 .format_trace = format_nat44_handoff_trace,
287 .type = VLIB_NODE_TYPE_INTERNAL,
288 .n_errors = ARRAY_LEN(nat44_handoff_error_strings),
289 .error_strings = nat44_handoff_error_strings,
297 VLIB_NODE_FN (snat_out2in_worker_handoff_node) (vlib_main_t * vm,
298 vlib_node_runtime_t * node,
299 vlib_frame_t * frame)
301 return nat44_worker_handoff_fn_inline (vm, node, frame, 0, 0);
305 VLIB_REGISTER_NODE (snat_out2in_worker_handoff_node) = {
306 .name = "nat44-out2in-worker-handoff",
307 .vector_size = sizeof (u32),
308 .format_trace = format_nat44_handoff_trace,
309 .type = VLIB_NODE_TYPE_INTERNAL,
310 .n_errors = ARRAY_LEN(nat44_handoff_error_strings),
311 .error_strings = nat44_handoff_error_strings,
320 * fd.io coding-style-patch-verification: ON
323 * eval: (c-set-style "gnu")