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authorNeale Ranns <nranns@cisco.com>2017-04-05 08:11:14 -0700
committerDamjan Marion <dmarion.lists@gmail.com>2017-04-06 15:18:44 +0000
commit88fc83eb716bf07f4634de6de5b569f795a56418 (patch)
tree4c8037b62cb6a57209aef4e28ae273d0ba4e40e7 /src/vnet/bfd/bfd_main.c
parent5ee51f8ed616f14f3b32ae8857d383fefa02d861 (diff)
BFD-FIB interactions
- single-hop BFD: attach a delegate to the appropriate adjacency - multi-hop BFD [not supported yet]: attach a delegate to the FIB entry. adjacency/fib_entry state tracks the BFD session state. when the state is down the object does not contribute forwarding hence and hence dependent objects will not use it. For example, if a route is ECMP via two adjacencies and one of them is BFD down, then only the other is used to forward (i.e. we don't drop half the traffic). Change-Id: I0ef53e20e73b067001a132cd0a3045408811a822 Signed-off-by: Neale Ranns <nranns@cisco.com>
Diffstat (limited to 'src/vnet/bfd/bfd_main.c')
-rw-r--r--src/vnet/bfd/bfd_main.c23
1 files changed, 23 insertions, 0 deletions
diff --git a/src/vnet/bfd/bfd_main.c b/src/vnet/bfd/bfd_main.c
index 2b70a20c9fd..66b31ce502c 100644
--- a/src/vnet/bfd/bfd_main.c
+++ b/src/vnet/bfd/bfd_main.c
@@ -101,6 +101,7 @@ bfd_set_defaults (bfd_main_t * bm, bfd_session_t * bs)
bs->local_diag = BFD_DIAG_CODE_no_diag;
bs->remote_state = BFD_STATE_down;
bs->remote_discr = 0;
+ bs->hop_type = BFD_HOP_TYPE_SINGLE;
bs->config_desired_min_tx_usec = BFD_DEFAULT_DESIRED_MIN_TX_USEC;
bs->config_desired_min_tx_clocks = bm->default_desired_min_tx_clocks;
bs->effective_desired_min_tx_clocks = bm->default_desired_min_tx_clocks;
@@ -387,6 +388,17 @@ bfd_set_remote_required_min_echo_rx (bfd_main_t * bm, bfd_session_t * bs,
}
}
+static void
+bfd_notify_listeners (bfd_main_t * bm,
+ bfd_listen_event_e event, const bfd_session_t * bs)
+{
+ bfd_notify_fn_t *fn;
+ vec_foreach (fn, bm->listeners)
+ {
+ (*fn) (event, bs);
+ }
+}
+
void
bfd_session_start (bfd_main_t * bm, bfd_session_t * bs)
{
@@ -396,6 +408,7 @@ bfd_session_start (bfd_main_t * bm, bfd_session_t * bs)
bfd_recalc_tx_interval (bm, bs);
vlib_process_signal_event (bm->vlib_main, bm->bfd_process_node_index,
BFD_EVENT_NEW_SESSION, bs->bs_idx);
+ bfd_notify_listeners (bm, BFD_LISTEN_EVENT_CREATE, bs);
}
void
@@ -533,6 +546,7 @@ bfd_on_state_change (bfd_main_t * bm, bfd_session_t * bs, u64 now,
bfd_set_timer (bm, bs, now, handling_wakeup);
break;
}
+ bfd_notify_listeners (bm, BFD_LISTEN_EVENT_UPDATE, bs);
}
static void
@@ -1121,6 +1135,14 @@ bfd_hw_interface_up_down (vnet_main_t * vnm, u32 hw_if_index, u32 flags)
VNET_HW_INTERFACE_LINK_UP_DOWN_FUNCTION (bfd_hw_interface_up_down);
+void
+bfd_register_listener (bfd_notify_fn_t fn)
+{
+ bfd_main_t *bm = &bfd_main;
+
+ vec_add1 (bm->listeners, fn);
+}
+
/*
* setup function
*/
@@ -1180,6 +1202,7 @@ bfd_get_session (bfd_main_t * bm, bfd_transport_e t)
void
bfd_put_session (bfd_main_t * bm, bfd_session_t * bs)
{
+ bfd_notify_listeners (bm, BFD_LISTEN_EVENT_DELETE, bs);
if (bs->auth.curr_key)
{
--bs->auth.curr_key->use_count;