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;
32 } nat44_handoff_trace_t;
34 #define foreach_nat44_handoff_error \
35 _(CONGESTION_DROP, "congestion drop") \
36 _(SAME_WORKER, "same worker") \
37 _(DO_HANDOFF, "do handoff")
41 #define _(sym,str) NAT44_HANDOFF_ERROR_##sym,
42 foreach_nat44_handoff_error
44 NAT44_HANDOFF_N_ERROR,
45 } nat44_handoff_error_t;
47 static char *nat44_handoff_error_strings[] = {
48 #define _(sym,string) string,
49 foreach_nat44_handoff_error
55 format_nat44_handoff_trace (u8 * s, va_list * args)
57 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
58 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
59 nat44_handoff_trace_t *t = va_arg (*args, nat44_handoff_trace_t *);
62 tag = t->in2out ? "IN2OUT" : "OUT2IN";
64 format (s, "NAT44_%s_WORKER_HANDOFF: next-worker %d trace index %d", tag,
65 t->next_worker_index, t->trace_index);
71 nat44_worker_handoff_fn_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
72 vlib_frame_t * frame, u8 is_output,
75 snat_main_t *sm = &snat_main;
76 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
77 u32 n_enq, n_left_from, *from;
78 u16 thread_indices[VLIB_FRAME_SIZE], *ti;
80 snat_get_worker_function_t *get_worker;
81 u32 thread_index = vm->thread_index;
82 u32 do_handoff = 0, same_worker = 0;
84 from = vlib_frame_vector_args (frame);
85 n_left_from = frame->n_vectors;
86 vlib_get_buffers (vm, from, bufs, n_left_from);
91 ASSERT (vec_len (sm->workers));
95 get_worker = sm->worker_in2out_cb;
97 fq_index = sm->fq_in2out_output_index;
99 fq_index = sm->fq_in2out_index;
103 fq_index = sm->fq_out2in_index;
104 get_worker = sm->worker_out2in_cb;
107 while (n_left_from > 0)
113 sw_if_index0 = vnet_buffer (b[0])->sw_if_index[VLIB_RX];
114 rx_fib_index0 = ip4_fib_table_get_index_for_sw_if_index (sw_if_index0);
115 ip0 = vlib_buffer_get_current (b[0]);
116 ti[0] = get_worker (ip0, rx_fib_index0);
118 if (ti[0] != thread_index)
123 if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE)
124 && (b[0]->flags & VLIB_BUFFER_IS_TRACED)))
126 nat44_handoff_trace_t *t =
127 vlib_add_trace (vm, node, b[0], sizeof (*t));
128 t->next_worker_index = ti[0];
129 t->trace_index = vlib_buffer_get_trace_index (b[0]);
130 t->in2out = is_in2out;
139 vlib_buffer_enqueue_to_thread (vm, fq_index, from, thread_indices,
140 frame->n_vectors, 1);
142 if (n_enq < frame->n_vectors)
143 vlib_node_increment_counter (vm, node->node_index,
144 NAT44_HANDOFF_ERROR_CONGESTION_DROP,
145 frame->n_vectors - n_enq);
146 vlib_node_increment_counter (vm, node->node_index,
147 NAT44_HANDOFF_ERROR_SAME_WORKER, same_worker);
148 vlib_node_increment_counter (vm, node->node_index,
149 NAT44_HANDOFF_ERROR_DO_HANDOFF, do_handoff);
150 return frame->n_vectors;
153 VLIB_NODE_FN (snat_in2out_worker_handoff_node) (vlib_main_t * vm,
154 vlib_node_runtime_t * node,
155 vlib_frame_t * frame)
157 return nat44_worker_handoff_fn_inline (vm, node, frame, 0, 1);
161 VLIB_REGISTER_NODE (snat_in2out_worker_handoff_node) = {
162 .name = "nat44-in2out-worker-handoff",
163 .vector_size = sizeof (u32),
164 .format_trace = format_nat44_handoff_trace,
165 .type = VLIB_NODE_TYPE_INTERNAL,
166 .n_errors = ARRAY_LEN(nat44_handoff_error_strings),
167 .error_strings = nat44_handoff_error_strings,
175 VLIB_NODE_FN (snat_in2out_output_worker_handoff_node) (vlib_main_t * vm,
176 vlib_node_runtime_t *
178 vlib_frame_t * frame)
180 return nat44_worker_handoff_fn_inline (vm, node, frame, 1, 1);
184 VLIB_REGISTER_NODE (snat_in2out_output_worker_handoff_node) = {
185 .name = "nat44-in2out-output-worker-handoff",
186 .vector_size = sizeof (u32),
187 .format_trace = format_nat44_handoff_trace,
188 .type = VLIB_NODE_TYPE_INTERNAL,
189 .n_errors = ARRAY_LEN(nat44_handoff_error_strings),
190 .error_strings = nat44_handoff_error_strings,
198 VLIB_NODE_FN (snat_out2in_worker_handoff_node) (vlib_main_t * vm,
199 vlib_node_runtime_t * node,
200 vlib_frame_t * frame)
202 return nat44_worker_handoff_fn_inline (vm, node, frame, 0, 0);
206 VLIB_REGISTER_NODE (snat_out2in_worker_handoff_node) = {
207 .name = "nat44-out2in-worker-handoff",
208 .vector_size = sizeof (u32),
209 .format_trace = format_nat44_handoff_trace,
210 .type = VLIB_NODE_TYPE_INTERNAL,
211 .n_errors = ARRAY_LEN(nat44_handoff_error_strings),
212 .error_strings = nat44_handoff_error_strings,
221 * fd.io coding-style-patch-verification: ON
224 * eval: (c-set-style "gnu")