lib: remove the vrf_is_mapped_on_netns() function

Now that all daemons receive the VRF backend from zebra, we can get
rid of vrf_is_mapped_on_netns() in favor of using the more convenient
vrf_is_backend_netns() function, which doesn't require any argument.

This commit also fixes the following problem:
  debian(config)# ip route 50.0.0.0/8 blackhole vrf FAKE table 2
  % table param only available when running on netns-based vrfs

Even when zebra was started with the --vrfwnetns, the error
above would be displayed since the VRF FAKE didn't exist, which
would make vrf_is_mapped_on_netns() return 0 incorrectly. Using
vrf_is_backend_netns() this problem doesn't happen anymore.

Signed-off-by: Renato Westphal <renato@opensourcerouting.org>

4 files changed, 14 insertions, 25 deletions

diff --git a/bgpd/bgp_network.c b/bgpd/bgp_network.c
index e15b8f4ec3..4153da5a64 100644
--- a/bgpd/bgp_network.c
+++ b/bgpd/bgp_network.c
@@ -670,8 +670,7 @@ static int bgp_listener(int sock, struct sockaddr *sa, socklen_t salen,
 	listener->fd = sock;
 
 	/* this socket needs a change of ns. record bgp back pointer */
-	if (bgp->vrf_id != VRF_DEFAULT && vrf_is_mapped_on_netns(
-						vrf_lookup_by_id(bgp->vrf_id)))
+	if (bgp->vrf_id != VRF_DEFAULT && vrf_is_backend_netns())
 		listener->bgp = bgp;
 
 	memcpy(&listener->su, sa, salen);
diff --git a/lib/vrf.c b/lib/vrf.c
index 0c82f6a3cd..f9f14822cb 100644
--- a/lib/vrf.c
+++ b/lib/vrf.c
@@ -716,13 +716,6 @@ int vrf_netns_handler_create(struct vty *vty, struct vrf *vrf, char *pathname,
 	return CMD_SUCCESS;
 }
 
-int vrf_is_mapped_on_netns(struct vrf *vrf)
-{
-	if (!vrf || vrf->data.l.netns_name[0] == '\0')
-		return 0;
-	return 1;
-}
-
 /* vrf CLI commands */
 DEFUN_NOSH(vrf_exit,
            vrf_exit_cmd,
@@ -953,7 +946,7 @@ int vrf_bind(vrf_id_t vrf_id, int fd, char *name)
 
 	if (fd < 0 || name == NULL)
 		return fd;
-	if (vrf_is_mapped_on_netns(vrf_lookup_by_id(vrf_id)))
+	if (vrf_is_backend_netns())
 		return fd;
 #ifdef SO_BINDTODEVICE
 	ret = setsockopt(fd, SOL_SOCKET, SO_BINDTODEVICE, name, strlen(name)+1);
diff --git a/lib/vrf.h b/lib/vrf.h
index fe4fc77250..e80796f480 100644
--- a/lib/vrf.h
+++ b/lib/vrf.h
@@ -240,9 +240,6 @@ extern void vrf_set_default_name(const char *default_name, bool force);
 extern const char *vrf_get_default_name(void);
 #define VRF_DEFAULT_NAME    vrf_get_default_name()
 
-/* VRF is mapped on netns or not ? */
-int vrf_is_mapped_on_netns(struct vrf *vrf);
-
 /* VRF switch from NETNS */
 extern int vrf_switch_to_netns(vrf_id_t vrf_id);
 extern int vrf_switchback_to_initial(void);
diff --git a/staticd/static_vty.c b/staticd/static_vty.c
index ae0026cc97..f09c304359 100644
--- a/staticd/static_vty.c
+++ b/staticd/static_vty.c
@@ -775,7 +775,7 @@ DEFPY(ip_route_blackhole,
       "Table to configure\n"
       "The table number to configure\n")
 {
-	if (table_str && vrf && !vrf_is_mapped_on_netns(vrf_lookup_by_name(vrf))) {
+	if (table_str && vrf && !vrf_is_backend_netns()) {
 		vty_out(vty,
 			"%% table param only available when running on netns-based vrfs\n");
 		return CMD_WARNING_CONFIG_FAILED;
@@ -814,7 +814,7 @@ DEFPY(ip_route_blackhole_vrf,
 	VTY_DECLVAR_CONTEXT(vrf, vrf);
 	struct static_vrf *svrf = vrf->info;
 
-	if (table_str && !vrf_is_mapped_on_netns(vrf)) {
+	if (table_str && !vrf_is_backend_netns()) {
 		vty_out(vty,
 			"%% table param only available when running on netns-based vrfs\n");
 		return CMD_WARNING_CONFIG_FAILED;
@@ -880,7 +880,7 @@ DEFPY(ip_route_address_interface,
 		return CMD_WARNING_CONFIG_FAILED;
 	}
 
-	if (table_str && vrf && !vrf_is_mapped_on_netns(vrf_lookup_by_name(vrf))) {
+	if (table_str && vrf && !vrf_is_backend_netns()) {
 		vty_out(vty,
 			"%% table param only available when running on netns-based vrfs\n");
 		return CMD_WARNING_CONFIG_FAILED;
@@ -938,7 +938,7 @@ DEFPY(ip_route_address_interface_vrf,
 	struct static_vrf *svrf = vrf->info;
 	struct static_vrf *nh_svrf;
 
-	if (table_str && !vrf_is_mapped_on_netns(vrf)) {
+	if (table_str && !vrf_is_backend_netns()) {
 		vty_out(vty,
 			"%% table param only available when running on netns-based vrfs\n");
 		return CMD_WARNING_CONFIG_FAILED;
@@ -999,7 +999,7 @@ DEFPY(ip_route,
 	struct static_vrf *nh_svrf;
 	const char *flag = NULL;
 
-	if (table_str && vrf && !vrf_is_mapped_on_netns(vrf_lookup_by_name(vrf))) {
+	if (table_str && vrf && !vrf_is_backend_netns()) {
 		vty_out(vty,
 			"%% table param only available when running on netns-based vrfs\n");
 		return CMD_WARNING_CONFIG_FAILED;
@@ -1065,7 +1065,7 @@ DEFPY(ip_route_vrf,
 	struct static_vrf *nh_svrf;
 	const char *flag = NULL;
 
-	if (table_str && !vrf_is_mapped_on_netns(vrf)) {
+	if (table_str && !vrf_is_backend_netns()) {
 		vty_out(vty,
 			"%% table param only available when running on netns-based vrfs\n");
 		return CMD_WARNING_CONFIG_FAILED;
@@ -1119,7 +1119,7 @@ DEFPY(ipv6_route_blackhole,
       "Table to configure\n"
       "The table number to configure\n")
 {
-	if (table_str && vrf && !vrf_is_mapped_on_netns(vrf_lookup_by_name(vrf))) {
+	if (table_str && vrf && !vrf_is_backend_netns()) {
 		vty_out(vty,
 			"%% table param only available when running on netns-based vrfs\n");
 		return CMD_WARNING_CONFIG_FAILED;
@@ -1158,7 +1158,7 @@ DEFPY(ipv6_route_blackhole_vrf,
 	VTY_DECLVAR_CONTEXT(vrf, vrf);
 	struct static_vrf *svrf = vrf->info;
 
-	if (table_str && !vrf_is_mapped_on_netns(vrf)) {
+	if (table_str && !vrf_is_backend_netns()) {
 		vty_out(vty,
 			"%% table param only available when running on netns-based vrfs\n");
 		return CMD_WARNING_CONFIG_FAILED;
@@ -1213,7 +1213,7 @@ DEFPY(ipv6_route_address_interface,
 	struct static_vrf *nh_svrf;
 	const char *flag = NULL;
 
-	if (table_str && vrf && !vrf_is_mapped_on_netns(vrf_lookup_by_name(vrf))) {
+	if (table_str && vrf && !vrf_is_backend_netns()) {
 		vty_out(vty,
 			"%% table param only available when running on netns-based vrfs\n");
 		return CMD_WARNING_CONFIG_FAILED;
@@ -1282,7 +1282,7 @@ DEFPY(ipv6_route_address_interface_vrf,
 	struct static_vrf *nh_svrf;
 	const char *flag = NULL;
 
-	if (table_str && !vrf_is_mapped_on_netns(vrf)) {
+	if (table_str && !vrf_is_backend_netns()) {
 		vty_out(vty,
 			"%% table param only available when running on netns-based vrfs\n");
 		return CMD_WARNING_CONFIG_FAILED;
@@ -1343,7 +1343,7 @@ DEFPY(ipv6_route,
 	struct static_vrf *nh_svrf;
 	const char *flag = NULL;
 
-	if (table_str && vrf && !vrf_is_mapped_on_netns(vrf_lookup_by_name(vrf))) {
+	if (table_str && vrf && !vrf_is_backend_netns()) {
 		vty_out(vty,
 			"%% table param only available when running on netns-based vrfs\n");
 		return CMD_WARNING_CONFIG_FAILED;
@@ -1409,7 +1409,7 @@ DEFPY(ipv6_route_vrf,
 	struct static_vrf *nh_svrf;
 	const char *flag = NULL;
 
-	if (table_str && !vrf_is_mapped_on_netns(vrf)) {
+	if (table_str && !vrf_is_backend_netns()) {
 		vty_out(vty,
 			"%% table param only available when running on netns-based vrfs\n");
 		return CMD_WARNING_CONFIG_FAILED;