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/*
* 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 <vlib/vlib.h>
#include <vnet/bonding/node.h>
#include <lacp/node.h>
/*
* LACP State = DETACHED
*/
static lacp_fsm_state_t lacp_mux_state_detached[] = {
{LACP_ACTION_DETACHED, LACP_MUX_STATE_DETACHED}, // event 0 BEGIN
{LACP_ACTION_WAITING, LACP_MUX_STATE_WAITING}, // event 1 SELECTED
{LACP_ACTION_WAITING, LACP_MUX_STATE_WAITING}, // event 2 STANDBY
{LACP_ACTION_DETACHED, LACP_MUX_STATE_DETACHED}, // event 3 UNSELECTED
{LACP_ACTION_DETACHED, LACP_MUX_STATE_DETACHED}, // event 4 READY
{LACP_ACTION_DETACHED, LACP_MUX_STATE_DETACHED}, // event 5 SYNC
};
/*
* LACP State = WAITING
*/
static lacp_fsm_state_t lacp_mux_state_waiting[] = {
{LACP_ACTION_DETACHED, LACP_MUX_STATE_DETACHED}, // event 0 BEGIN
{LACP_ACTION_WAITING, LACP_MUX_STATE_WAITING}, // event 1 SELECTED
{LACP_ACTION_WAITING, LACP_MUX_STATE_WAITING}, // event 2 STANDBY
{LACP_ACTION_DETACHED, LACP_MUX_STATE_DETACHED}, // event 3 UNSELECTED
{LACP_ACTION_ATTACHED, LACP_MUX_STATE_ATTACHED}, // event 4 READY
{LACP_ACTION_WAITING, LACP_MUX_STATE_WAITING}, // event 5 SYNC
};
/*
* LACP State = ATTACHED
*/
static lacp_fsm_state_t lacp_mux_state_attached[] = {
{LACP_ACTION_DETACHED, LACP_MUX_STATE_DETACHED}, // event 0 BEGIN
{LACP_ACTION_ATTACHED, LACP_MUX_STATE_ATTACHED}, // event 1 SELECTED
{LACP_ACTION_DETACHED, LACP_MUX_STATE_DETACHED}, // event 2 STANDBY
{LACP_ACTION_DETACHED, LACP_MUX_STATE_DETACHED}, // event 3 UNSELECTED
{LACP_ACTION_ATTACHED, LACP_MUX_STATE_ATTACHED}, // event 4 READY
{LACP_ACTION_COLLECTING_DISTRIBUTING, LACP_MUX_STATE_COLLECTING_DISTRIBUTING}, // event 5_SYNC
};
/*
* LACP State = COLLECTING_DISTRIBUTING
*/
static lacp_fsm_state_t lacp_mux_state_collecting_distributing[] = {
{LACP_ACTION_DETACHED, LACP_MUX_STATE_DETACHED}, // event 0 BEGIN
{LACP_ACTION_COLLECTING_DISTRIBUTING, LACP_MUX_STATE_COLLECTING_DISTRIBUTING}, // event 1 SELECTED
{LACP_ACTION_COLLECTING_DISTRIBUTING, LACP_MUX_STATE_COLLECTING_DISTRIBUTING}, // event 2 STANDBY
{LACP_ACTION_ATTACHED, LACP_MUX_STATE_ATTACHED}, // event 3 UNSELECTED
{LACP_ACTION_COLLECTING_DISTRIBUTING, LACP_MUX_STATE_COLLECTING_DISTRIBUTING}, // event 4 READY
{LACP_ACTION_COLLECTING_DISTRIBUTING, LACP_MUX_STATE_COLLECTING_DISTRIBUTING}, // event 5 SYNC
};
static lacp_fsm_machine_t lacp_mux_fsm_table[] = {
{lacp_mux_state_detached},
{lacp_mux_state_waiting},
{lacp_mux_state_attached},
{lacp_mux_state_collecting_distributing},
};
lacp_machine_t lacp_mux_machine = {
lacp_mux_fsm_table,
lacp_mux_debug_func,
};
static void
lacp_detach_mux_from_aggregator (vlib_main_t * vm, slave_if_t * sif)
{
sif->actor.state &= ~LACP_STATE_SYNCHRONIZATION;
sif->ready = 0;
sif->ready_n = 0;
}
static void
lacp_attach_mux_to_aggregator (vlib_main_t * vm, slave_if_t * sif)
{
sif->actor.state |= LACP_STATE_SYNCHRONIZATION;
}
int
lacp_mux_action_detached (void *p1, void *p2)
{
vlib_main_t *vm = (vlib_main_t *) p1;
slave_if_t *sif = (slave_if_t *) p2;
lacp_detach_mux_from_aggregator (vm, sif);
sif->actor.state &= ~LACP_STATE_COLLECTING;
bond_disable_collecting_distributing (vm, sif);
sif->actor.state &= ~LACP_STATE_DISTRIBUTING;
sif->ntt = 1;
lacp_machine_dispatch (&lacp_tx_machine, vm, sif, LACP_TX_EVENT_NTT,
&sif->tx_state);
if (sif->selected == LACP_PORT_SELECTED)
lacp_machine_dispatch (&lacp_mux_machine, vm, sif,
LACP_MUX_EVENT_SELECTED, &sif->mux_state);
if (sif->selected == LACP_PORT_STANDBY)
lacp_machine_dispatch (&lacp_mux_machine, vm, sif, LACP_MUX_EVENT_STANDBY,
&sif->mux_state);
return 0;
}
int
lacp_mux_action_attached (void *p1, void *p2)
{
vlib_main_t *vm = (vlib_main_t *) p1;
slave_if_t *sif = (slave_if_t *) p2;
lacp_attach_mux_to_aggregator (vm, sif);
sif->actor.state &= ~LACP_STATE_COLLECTING;
bond_disable_collecting_distributing (vm, sif);
sif->actor.state &= ~LACP_STATE_DISTRIBUTING;
sif->ntt = 1;
lacp_machine_dispatch (&lacp_tx_machine, vm, sif, LACP_TX_EVENT_NTT,
&sif->tx_state);
if ((sif->selected == LACP_PORT_UNSELECTED) ||
(sif->selected == LACP_PORT_STANDBY))
lacp_machine_dispatch (&lacp_mux_machine, vm, sif,
LACP_MUX_EVENT_UNSELECTED, &sif->mux_state);
if ((sif->selected == LACP_PORT_SELECTED) &&
(sif->partner.state & LACP_STATE_SYNCHRONIZATION))
lacp_machine_dispatch (&lacp_mux_machine, vm, sif, LACP_MUX_EVENT_SYNC,
&sif->mux_state);
return 0;
}
int
lacp_mux_action_waiting (void *p1, void *p2)
{
vlib_main_t *vm = (vlib_main_t *) p1;
slave_if_t *sif = (slave_if_t *) p2;
lacp_main_t *lm = &lacp_main;
if (!lacp_timer_is_running (sif->wait_while_timer))
lacp_start_wait_while_timer (lm->vlib_main, sif,
LACP_AGGREGATE_WAIT_TIME);
if ((sif->selected == LACP_PORT_SELECTED) && sif->ready)
lacp_machine_dispatch (&lacp_mux_machine, vm, sif,
LACP_MUX_EVENT_READY, &sif->mux_state);
if (sif->selected == LACP_PORT_UNSELECTED)
lacp_machine_dispatch (&lacp_mux_machine, vm, sif,
LACP_MUX_EVENT_UNSELECTED, &sif->mux_state);
return 0;
}
int
lacp_mux_action_collecting_distributing (void *p1, void *p2)
{
vlib_main_t *vm = (vlib_main_t *) p1;
slave_if_t *sif = (slave_if_t *) p2;
sif->actor.state |= LACP_STATE_SYNCHRONIZATION | LACP_STATE_COLLECTING |
LACP_STATE_DISTRIBUTING;
bond_enable_collecting_distributing (vm, sif);
sif->ntt = 1;
lacp_machine_dispatch (&lacp_tx_machine, vm, sif, LACP_TX_EVENT_NTT,
&sif->tx_state);
if ((sif->selected == LACP_PORT_UNSELECTED) ||
(sif->selected == LACP_PORT_STANDBY) ||
!(sif->partner.state & LACP_STATE_SYNCHRONIZATION))
lacp_machine_dispatch (&lacp_mux_machine, vm, sif,
LACP_MUX_EVENT_UNSELECTED, &sif->mux_state);
return 0;
}
static u8 *
format_mux_event (u8 * s, va_list * args)
{
static lacp_event_struct lacp_mux_event_array[] = {
#define _(b, s, n) {.bit = b, .str = #s, },
foreach_lacp_mux_event
#undef _
{.str = NULL}
};
int e = va_arg (*args, int);
lacp_event_struct *event_entry =
(lacp_event_struct *) & lacp_mux_event_array;
if (e >= (sizeof (lacp_mux_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_mux_debug_func (slave_if_t * sif, int event, int state,
lacp_fsm_state_t * transition)
{
clib_warning ("%U-MUX: event %U, old state %U, new state %U",
format_vnet_sw_if_index_name, vnet_get_main (),
sif->sw_if_index, format_mux_event,
event, format_mux_sm_state, state, format_mux_sm_state,
transition->next_state);
}
void
lacp_init_mux_machine (vlib_main_t * vm, slave_if_t * sif)
{
lacp_machine_dispatch (&lacp_mux_machine, vm, sif, LACP_MUX_EVENT_BEGIN,
&sif->mux_state);
}
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
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