2 * Copyright (c) 2017 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 #include <vnet/bonding/node.h>
18 #include <vnet/ethernet/packet.h>
19 #include <lacp/node.h>
21 lacp_state_struct lacp_state_array[] = {
22 #define _(b, s, n) {.bit = b, .str = #s, },
23 foreach_lacp_state_flag
30 2 x LACP graph nodes: an "interior" node to process
31 incoming announcements, and a "process" node to periodically
34 The interior node is neither pipelined nor dual-looped, because
35 it would be very unusual to see more than one LACP packet in
36 a given input frame. So, it's a very simple / straightforward
41 * packet counter strings
42 * Dump these counters via the "show error" CLI command
44 static char *lacp_error_strings[] = {
45 #define _(sym,string) string,
51 * We actually send all lacp pkts to the "error" node after scanning
52 * them, so the graph node has only one next-index. The "error-drop"
53 * node automatically bumps our per-node packet counters for us.
57 LACP_INPUT_NEXT_NORMAL,
62 * Process a frame of lacp packets
63 * Expect 1 packet / frame
66 lacp_node_fn (vlib_main_t * vm,
67 vlib_node_runtime_t * node, vlib_frame_t * frame)
69 u32 n_left_from, *from;
70 lacp_input_trace_t *t0;
72 from = vlib_frame_vector_args (frame); /* array of buffer indices */
73 n_left_from = frame->n_vectors; /* number of buffer indices */
75 while (n_left_from > 0)
82 b0 = vlib_get_buffer (vm, bi0);
84 next0 = LACP_INPUT_NEXT_NORMAL;
86 /* scan this lacp pkt. error0 is the counter index to bump */
87 error0 = lacp_input (vm, b0, bi0);
88 b0->error = node->errors[error0];
90 /* If this pkt is traced, snapshoot the data */
91 if (PREDICT_FALSE (node->flags & VLIB_NODE_FLAG_TRACE))
95 t0 = vlib_add_trace (vm, node, b0, sizeof (*t0));
96 len = (b0->current_length < sizeof (t0->pkt))
97 ? b0->current_length : sizeof (t0->pkt);
99 t0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
100 clib_memcpy_fast (&t0->pkt, vlib_buffer_get_current (b0), len);
102 /* push this pkt to the next graph node, always error-drop */
103 vlib_set_next_frame_buffer (vm, node, next0, bi0);
109 return frame->n_vectors;
113 * lacp input graph node declaration
115 VLIB_REGISTER_NODE (lacp_input_node, static) = {
116 .function = lacp_node_fn,
117 .name = "lacp-input",
118 .vector_size = sizeof (u32),
119 .type = VLIB_NODE_TYPE_INTERNAL,
121 .n_errors = LACP_N_ERROR,
122 .error_strings = lacp_error_strings,
124 .format_trace = lacp_input_format_trace,
126 .n_next_nodes = LACP_INPUT_N_NEXT,
128 [LACP_INPUT_NEXT_NORMAL] = "error-drop",
133 lacp_elog_start_event (void)
135 lacp_main_t *lm = &lacp_main;
136 ELOG_TYPE_DECLARE (e) =
138 .format = "Starting LACP process, interface count = %d",
146 ed = ELOG_DATA (&vlib_global_main.elog_main, e);
147 ed->count = lm->lacp_int;
151 lacp_elog_stop_event (void)
153 lacp_main_t *lm = &lacp_main;
154 ELOG_TYPE_DECLARE (e) =
156 .format = "Stopping LACP process, interface count = %d",
164 ed = ELOG_DATA (&vlib_global_main.elog_main, e);
165 ed->count = lm->lacp_int;
169 * lacp periodic function
172 lacp_process (vlib_main_t * vm, vlib_node_runtime_t * rt, vlib_frame_t * f)
174 lacp_main_t *lm = &lacp_main;
175 f64 poll_time_remaining;
176 uword event_type, *event_data = 0;
178 ethernet_register_input_type (vm, ETHERNET_TYPE_SLOW_PROTOCOLS /* LACP */ ,
179 lacp_input_node.index);
181 poll_time_remaining = 0.2;
184 if (lm->lacp_int > 0)
185 poll_time_remaining =
186 vlib_process_wait_for_event_or_clock (vm, poll_time_remaining);
188 vlib_process_wait_for_event (vm);
190 event_type = vlib_process_get_events (vm, &event_data);
193 case ~0: /* no events => timeout */
195 case LACP_PROCESS_EVENT_START:
196 poll_time_remaining = 0.2;
197 lacp_elog_start_event ();
199 case LACP_PROCESS_EVENT_STOP:
200 if (lm->lacp_int == 0)
202 poll_time_remaining = SECS_IN_A_DAY;
203 lacp_elog_stop_event ();
207 clib_warning ("BUG: event type 0x%wx", event_type);
210 vec_reset_length (event_data);
212 if (vlib_process_suspend_time_is_zero (poll_time_remaining))
215 poll_time_remaining = 0.2;
223 lacp_create_periodic_process (void)
225 lacp_main_t *lm = &lacp_main;
227 /* Already created the process node? */
228 if (lm->lacp_process_node_index > 0)
231 /* No, create it now and make a note of the node index */
232 lm->lacp_process_node_index =
233 vlib_process_create (lm->vlib_main, "lacp-process", lacp_process,
234 16 /* log2_n_stack_bytes */ );
238 * fd.io coding-style-patch-verification: ON
241 * eval: (c-set-style "gnu")