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
28 static vlib_node_registration_t lacp_process_node;
32 2 x LACP graph nodes: an "interior" node to process
33 incoming announcements, and a "process" node to periodically
36 The interior node is neither pipelined nor dual-looped, because
37 it would be very unusual to see more than one LACP packet in
38 a given input frame. So, it's a very simple / straighforward
43 * packet counter strings
44 * Dump these counters via the "show error" CLI command
46 static char *lacp_error_strings[] = {
47 #define _(sym,string) string,
53 * We actually send all lacp pkts to the "error" node after scanning
54 * them, so the graph node has only one next-index. The "error-drop"
55 * node automatically bumps our per-node packet counters for us.
59 LACP_INPUT_NEXT_NORMAL,
64 * Process a frame of lacp packets
65 * Expect 1 packet / frame
68 lacp_node_fn (vlib_main_t * vm,
69 vlib_node_runtime_t * node, vlib_frame_t * frame)
71 u32 n_left_from, *from;
72 lacp_input_trace_t *t0;
73 uword n_trace = vlib_get_trace_count (vm, node);
75 from = vlib_frame_vector_args (frame); /* array of buffer indices */
76 n_left_from = frame->n_vectors; /* number of buffer indices */
78 while (n_left_from > 0)
85 b0 = vlib_get_buffer (vm, bi0);
87 next0 = LACP_INPUT_NEXT_NORMAL;
89 /* scan this lacp pkt. error0 is the counter index to bump */
90 error0 = lacp_input (vm, b0, bi0);
91 b0->error = node->errors[error0];
93 /* If this pkt is traced, snapshoot the data */
94 if (PREDICT_FALSE (n_trace > 0))
97 vlib_trace_buffer (vm, node, next0, b0,
98 /* follow_chain */ 0);
99 vlib_set_trace_count (vm, node, --n_trace);
100 t0 = vlib_add_trace (vm, node, b0, sizeof (*t0));
101 len = (b0->current_length < sizeof (t0->pkt))
102 ? b0->current_length : sizeof (t0->pkt);
104 t0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
105 clib_memcpy_fast (&t0->pkt, vlib_buffer_get_current (b0), len);
107 /* push this pkt to the next graph node, always error-drop */
108 vlib_set_next_frame_buffer (vm, node, next0, bi0);
114 return frame->n_vectors;
118 * lacp input graph node declaration
121 VLIB_REGISTER_NODE (lacp_input_node, static) = {
122 .function = lacp_node_fn,
123 .name = "lacp-input",
124 .vector_size = sizeof (u32),
125 .type = VLIB_NODE_TYPE_INTERNAL,
127 .n_errors = LACP_N_ERROR,
128 .error_strings = lacp_error_strings,
130 .format_trace = lacp_input_format_trace,
132 .n_next_nodes = LACP_INPUT_N_NEXT,
134 [LACP_INPUT_NEXT_NORMAL] = "error-drop",
140 * lacp periodic function
143 lacp_process (vlib_main_t * vm, vlib_node_runtime_t * rt, vlib_frame_t * f)
145 lacp_main_t *lm = &lacp_main;
146 f64 poll_time_remaining;
147 uword event_type, *event_data = 0;
150 /* So we can send events to the lacp process */
151 lm->lacp_process_node_index = lacp_process_node.index;
153 ethernet_register_input_type (vm, ETHERNET_TYPE_SLOW_PROTOCOLS /* LACP */ ,
154 lacp_input_node.index);
156 poll_time_remaining = 0.2;
160 poll_time_remaining =
161 vlib_process_wait_for_event_or_clock (vm, poll_time_remaining);
163 vlib_process_wait_for_event (vm);
165 event_type = vlib_process_get_events (vm, &event_data);
168 case ~0: /* no events => timeout */
170 case LACP_PROCESS_EVENT_START:
173 case LACP_PROCESS_EVENT_STOP:
177 clib_warning ("BUG: event type 0x%wx", event_type);
181 _vec_len (event_data) = 0;
183 if (vlib_process_suspend_time_is_zero (poll_time_remaining))
186 poll_time_remaining = 0.2;
194 * lacp periodic node declaration
197 VLIB_REGISTER_NODE (lacp_process_node, static) = {
198 .function = lacp_process,
199 .type = VLIB_NODE_TYPE_PROCESS,
200 .name = "lacp-process",
205 * fd.io coding-style-patch-verification: ON
208 * eval: (c-set-style "gnu")