isisd: split northbound callbacks into multiple files

Rearrange the isisd northbound callbacks as following:
* isis_nb.h: prototypes of all northbound callbacks.
* isis_nb.c: definition of all northbound callbacks and their
  associated YANG data paths.
* isis_nb_config.c: implementation of YANG configuration nodes.
* isis_nb_state.c: implementation of YANG state nodes.
* isis_nb_notifications.c: implementation of YANG notifications.

This should help to keep to code more organized and easier to
maintain.

No behavior changes intended.

Signed-off-by: Renato Westphal <[email protected]>

Author: rwestphal

isisd/isis_adjacency.c

@@ -48,6 +48,7 @@
 #include "isisd/isis_mt.h"
 #include "isisd/isis_tlvs.h"
 #include "isisd/fabricd.h"
+#include "isisd/isis_nb.h"
 
 extern struct isis *isis;
 
@@ -375,6 +376,20 @@ void isis_adj_print(struct isis_adjacency *adj)
 	return;
 }
 
+const char *isis_adj_yang_state(enum isis_adj_state state)
+{
+	switch (state) {
+	case ISIS_ADJ_DOWN:
+		return "down";
+	case ISIS_ADJ_UP:
+		return "up";
+	case ISIS_ADJ_INITIALIZING:
+		return "init";
+	default:
+		return "failed";
+	}
+}
+
 int isis_adj_expire(struct thread *thread)
 {
 	struct isis_adjacency *adj;

isisd/isis_adjacency.h

@@ -121,6 +121,7 @@ DECLARE_HOOK(isis_adj_state_change_hook, (struct isis_adjacency *adj), (adj))
 void isis_adj_state_change(struct isis_adjacency *adj,
 			   enum isis_adj_state state, const char *reason);
 void isis_adj_print(struct isis_adjacency *adj);
+const char *isis_adj_yang_state(enum isis_adj_state state);
 int isis_adj_expire(struct thread *thread);
 void isis_adj_print_vty(struct isis_adjacency *adj, struct vty *vty,
 			char detail);

isisd/isis_circuit.c

@@ -58,6 +58,7 @@
 #include "isisd/isis_mt.h"
 #include "isisd/isis_errors.h"
 #include "isisd/isis_tx_queue.h"
+#include "isisd/isis_nb.h"
 
 DEFINE_QOBJ_TYPE(isis_circuit)
 

isisd/isis_cli.c

@@ -32,7 +32,7 @@
 #include "yang.h"
 #include "lib/linklist.h"
 #include "isisd/isisd.h"
-#include "isisd/isis_cli.h"
+#include "isisd/isis_nb.h"
 #include "isisd/isis_misc.h"
 #include "isisd/isis_circuit.h"
 #include "isisd/isis_csm.h"

isisd/isis_cli.h

@@ -57,6 +57,7 @@
 #include "isisd/isis_te.h"
 #include "isisd/fabricd.h"
 #include "isisd/isis_tx_queue.h"
+#include "isisd/isis_nb.h"
 
 static int lsp_refresh(struct thread *thread);
 static int lsp_l1_refresh_pseudo(struct thread *thread);

isisd/isis_lsp.c

@@ -57,6 +57,7 @@
 #include "isisd/isis_lsp.h"
 #include "isisd/isis_mt.h"
 #include "isisd/fabricd.h"
+#include "isisd/isis_nb.h"
 
 /* Default configuration file name */
 #define ISISD_DEFAULT_CONFIG "isisd.conf"