isisd: log adj change when circuit goes down

if we shutdown an interface isisd will delete the adjacencies
on the corresponding circuit, but it will not log the change.
Fix it to make sure that each change is logged. Also specify
the level of the adjacency in the log message, while we are at it.

Signed-off-by: Emanuele Di Pascale <emanuele@voltanet.io>

1 files changed, 37 insertions, 0 deletions

diff --git a/isisd/isis_circuit.c b/isisd/isis_circuit.c
index 9804841d6..03d7b3d07 100644
--- a/isisd/isis_circuit.c
+++ b/isisd/isis_circuit.c
@@ -720,6 +720,43 @@ void isis_circuit_down(struct isis_circuit *circuit)
 	isis_notif_if_state_change(circuit, true);
 #endif /* ifndef FABRICD */
 
+	/* log adjacency changes if configured to do so */
+	if (circuit->area && circuit->area->log_adj_changes) {
+		struct isis_adjacency *adj = NULL;
+		if (circuit->circ_type == CIRCUIT_T_P2P) {
+			adj = circuit->u.p2p.neighbor;
+			if (adj)
+				isis_log_adj_change(
+					adj, adj->adj_state, ISIS_ADJ_DOWN,
+					"circuit is being brought down");
+		} else if (circuit->circ_type == CIRCUIT_T_BROADCAST) {
+			struct list *adj_list;
+			struct listnode *node;
+			if (circuit->u.bc.adjdb[0]) {
+				adj_list = list_new();
+				isis_adj_build_up_list(circuit->u.bc.adjdb[0],
+						       adj_list);
+				for (ALL_LIST_ELEMENTS_RO(adj_list, node, adj))
+					isis_log_adj_change(
+						adj, adj->adj_state,
+						ISIS_ADJ_DOWN,
+						"circuit is being brought down");
+				list_delete(&adj_list);
+			}
+			if (circuit->u.bc.adjdb[1]) {
+				adj_list = list_new();
+				isis_adj_build_up_list(circuit->u.bc.adjdb[1],
+						       adj_list);
+				for (ALL_LIST_ELEMENTS_RO(adj_list, node, adj))
+					isis_log_adj_change(
+						adj, adj->adj_state,
+						ISIS_ADJ_DOWN,
+						"circuit is being brought down");
+				list_delete(&adj_list);
+			}
+		}
+	}
+
 	/* Clear the flags for all the lsps of the circuit. */
 	isis_circuit_update_all_srmflags(circuit, 0);