bbfd: clear nb config entries when removing bfd node

When bfd node is removed, we must clear all NB entries set by its
children - sessions and profiles. Let's store some fake data as an entry
for the bfd node to be able to unset it later.

Signed-off-by: Igor Ryzhov <iryzhov@nfware.com>

1 files changed, 15 insertions, 1 deletions

diff --git a/bfdd/bfdd_nb_config.c b/bfdd/bfdd_nb_config.c
index 33adca793..b221b6d53 100644
--- a/bfdd/bfdd_nb_config.c
+++ b/bfdd/bfdd_nb_config.c
@@ -229,7 +229,15 @@ static int bfd_session_destroy(enum nb_event event,
  */
 int bfdd_bfd_create(struct nb_cb_create_args *args)
 {
-	/* NOTHING */
+	if (args->event != NB_EV_APPLY)
+		return NB_OK;
+
+	/*
+	 * Set any non-NULL value to be able to call
+	 * nb_running_unset_entry in bfdd_bfd_destroy.
+	 */
+	nb_running_set_entry(args->dnode, (void *)0x1);
+
 	return NB_OK;
 }
 
@@ -245,6 +253,12 @@ int bfdd_bfd_destroy(struct nb_cb_destroy_args *args)
 		return NB_OK;
 
 	case NB_EV_APPLY:
+		/*
+		 * We need to call this to unset pointers from
+		 * the child nodes - sessions and profiles.
+		 */
+		nb_running_unset_entry(args->dnode);
+
 		bfd_sessions_remove_manual();
 		bfd_profiles_remove();
 		break;