zebra: collect and get netnamespaces information

upon zebra initialisation, and upon further netnamespace creation, the
the netnamespaces are created and a vrf associated to the netnamespace
is created. By convention, the name of the netns will be the same as the
VRF.
Add a stub routine that returns a fake ns identifier, in case netlink (
linux machines) is not available.
Also, upon each newly discovered NETNS, a NSID id being generated,
either by relying on kernel NSID feature, or by generating locally the
NSID ( see previous commit for more information).

Signed-off-by: Philippe Guibert <philippe.guibert@6wind.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/zebra/main.c b/zebra/main.c
index 73e5f1290d..3353290816 100644
--- a/zebra/main.c
+++ b/zebra/main.c
@@ -47,6 +47,7 @@
 #include "zebra/redistribute.h"
 #include "zebra/zebra_mpls.h"
 #include "zebra/label_manager.h"
+#include "zebra/zebra_netns_notify.h"
 
 #define ZEBRA_PTM_SUPPORT
 
@@ -140,6 +141,7 @@ static void sigint(void)
 	vrf_terminate();
 
 	ns_walk_func(zebra_ns_disabled);
+	zebra_ns_notify_close();
 
 	access_list_reset();
 	prefix_list_reset();