zebra: enhance show vrf for netns and fixing

Show vrf command displays information on the vrf, if it is related to
vrf kernel or if it is related to netns.
When a vrf from kernel is detected, before creating a new vrf, a check
is done against an already present vrf, and if that vrf is not a vrf
mapped with a netns. If that is that case, then the creation is
rejected.

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

1 files changed, 7 insertions, 0 deletions

diff --git a/lib/ns.c b/lib/ns.c
index 5e6bddf0d8..5af896632c 100644
--- a/lib/ns.c
+++ b/lib/ns.c
@@ -218,6 +218,13 @@ void ns_walk_func(int (*func)(struct ns *))
 		func(ns);
 }
 
+const char *ns_get_name(struct ns *ns)
+{
+	if (!ns)
+		return NULL;
+	return ns->name;
+}
+
 /* Look up a NS by name */
 static struct ns *ns_lookup_name(const char *name)
 {