bond: Add bonding driver and LACP protocol

[vpp.git] / src / plugins / lacp / tx_machine.c

diff --git a/src/plugins/lacp/tx_machine.c b/src/plugins/lacp/tx_machine.c
new file mode 100644 (file)
index 0000000..794b4f1
--- /dev/null
+++ b/src/plugins/lacp/tx_machine.c
@@ -0,0 +1,109 @@
+/*
+ * Copyright (c) 2017 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#define _GNU_SOURCE
+
+#include <vnet/bonding/node.h>
+#include <lacp/node.h>
+
+/*
+ *  LACP State = TRANSMIT
+ */
+static lacp_fsm_state_t lacp_tx_state_transmit[] = {
+  {LACP_ACTION_TRANSMIT, LACP_TX_STATE_TRANSMIT},      // event 0 BEGIN
+  {LACP_ACTION_TRANSMIT, LACP_TX_STATE_TRANSMIT},      // event 1 NTT
+};
+
+static lacp_fsm_machine_t lacp_tx_fsm_table[] = {
+  {lacp_tx_state_transmit},
+};
+
+lacp_machine_t lacp_tx_machine = {
+  lacp_tx_fsm_table,
+  lacp_tx_debug_func,
+};
+
+int
+lacp_tx_action_transmit (void *p1, void *p2)
+{
+  vlib_main_t *vm = (vlib_main_t *) p1;
+  slave_if_t *sif = (slave_if_t *) p2;
+  f64 now = vlib_time_now (vm);
+
+  if (!lacp_timer_is_running (sif->periodic_timer))
+    return 0;
+
+  // No more than 3 LACPDUs per fast interval
+  if (now <= (sif->last_lacpdu_time + 0.333))
+    return 0;
+
+  if (sif->ntt)
+    {
+      lacp_send_lacp_pdu (vm, sif);
+    }
+  sif->ntt = 0;
+
+  return 0;
+}
+
+static u8 *
+format_tx_event (u8 * s, va_list * args)
+{
+  static lacp_event_struct lacp_tx_event_array[] = {
+#define _(b, s, n) {.bit = b, .str = #s, },
+    foreach_lacp_tx_event
+#undef _
+    {.str = NULL}
+  };
+  int e = va_arg (*args, int);
+  lacp_event_struct *event_entry =
+    (lacp_event_struct *) & lacp_tx_event_array;
+
+  if (e >= (sizeof (lacp_tx_event_array) / sizeof (*event_entry)))
+    s = format (s, "Bad event %d", e);
+  else
+    s = format (s, "%s", event_entry[e].str);
+
+  return s;
+}
+
+void
+lacp_tx_debug_func (slave_if_t * sif, int event, int state,
+                   lacp_fsm_state_t * transition)
+{
+  clib_warning ("%U-TX: event %U, old state %U, new state %U",
+               format_vnet_sw_if_index_name, vnet_get_main (),
+               sif->sw_if_index, format_tx_event,
+               event, format_tx_sm_state, state, format_tx_sm_state,
+               transition->next_state);
+}
+
+void
+lacp_init_tx_machine (vlib_main_t * vm, slave_if_t * sif)
+{
+  lacp_machine_dispatch (&lacp_tx_machine, vm, sif, LACP_TX_EVENT_BEGIN,
+                        &sif->tx_state);
+  if (sif->is_passive == 0)
+    lacp_machine_dispatch (&lacp_tx_machine, vm, sif, LACP_TX_EVENT_NTT,
+                          &sif->tx_state);
+}
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */