*: remove ZEBRA_INTERFACE_VRF_UPDATE

Currently when one interface changes its VRF, zebra will send these messages to
all daemons in *order*:
    1) `ZEBRA_INTERFACE_DELETE` ( notify them delete from old VRF )
    2) `ZEBRA_INTERFACE_VRF_UPDATE` ( notify them move from old to new VRF )
    3) `ZEBRA_INTERFACE_ADD` ( notify them added into new VRF )

When daemons deal with `VRF_UPDATE`, they use
`zebra_interface_vrf_update_read()->if_lookup_by_name()`
to check the interface exist or not in old VRF. This check will always return
*NULL* because `DELETE` ( deleted from old VRF ) is already done, so can't
find this interface in old VRF.

Send `VRF_UPDATE` is redundant and unuseful. `DELETE` and `ADD` are enough,
they will deal with RB tree, so don't send this `VRF_UPDATE` message when
vrf changes.

Since all daemons have good mechanism to deal with changing vrf, and don't
use this `VRF_UPDATE` mechanism.  So, it is safe to completely remove
all the code with `VRF_UPDATE`.

Signed-off-by: anlan_cs <anlan_cs@tom.com>

16 files changed, 5 insertions, 246 deletions

diff --git a/bfdd/ptm_adapter.c b/bfdd/ptm_adapter.c
index 490bc30d74..9e7ed114ee 100644
--- a/bfdd/ptm_adapter.c
+++ b/bfdd/ptm_adapter.c
@@ -756,20 +756,6 @@ static int bfd_ifp_destroy(struct interface *ifp)
 	return 0;
 }
 
-static int bfdd_interface_vrf_update(ZAPI_CALLBACK_ARGS)
-{
-	struct interface *ifp;
-	vrf_id_t nvrfid;
-
-	ifp = zebra_interface_vrf_update_read(zclient->ibuf, vrf_id, &nvrfid);
-	if (ifp == NULL)
-		return 0;
-
-	if_update_to_new_vrf(ifp, nvrfid);
-
-	return 0;
-}
-
 static void bfdd_sessions_enable_address(struct connected *ifc)
 {
 	struct bfd_session_observer *bso;
@@ -833,9 +819,6 @@ static zclient_handler *const bfd_handlers[] = {
 	 */
 	[ZEBRA_BFD_DEST_REPLAY] = bfdd_replay,
 
-	/* Learn about interface VRF. */
-	[ZEBRA_INTERFACE_VRF_UPDATE] = bfdd_interface_vrf_update,
-
 	/* Learn about new addresses being registered. */
 	[ZEBRA_INTERFACE_ADDRESS_ADD] = bfdd_interface_address_update,
 	[ZEBRA_INTERFACE_ADDRESS_DELETE] = bfdd_interface_address_update,
diff --git a/bgpd/bgp_zebra.c b/bgpd/bgp_zebra.c
index 741542f9ba..a04d54fa92 100644
--- a/bgpd/bgp_zebra.c
+++ b/bgpd/bgp_zebra.c
@@ -477,66 +477,6 @@ static int bgp_interface_nbr_address_delete(ZAPI_CALLBACK_ARGS)
 	return 0;
 }
 
-/* VRF update for an interface. */
-static int bgp_interface_vrf_update(ZAPI_CALLBACK_ARGS)
-{
-	struct interface *ifp;
-	vrf_id_t new_vrf_id;
-	struct connected *c;
-	struct nbr_connected *nc;
-	struct listnode *node, *nnode;
-	struct bgp *bgp;
-	struct peer *peer;
-
-	ifp = zebra_interface_vrf_update_read(zclient->ibuf, vrf_id,
-					      &new_vrf_id);
-	if (!ifp)
-		return 0;
-
-	if (BGP_DEBUG(zebra, ZEBRA))
-		zlog_debug("Rx Intf VRF change VRF %u IF %s NewVRF %u", vrf_id,
-			   ifp->name, new_vrf_id);
-
-	bgp = bgp_lookup_by_vrf_id(vrf_id);
-
-	if (bgp) {
-		for (ALL_LIST_ELEMENTS(ifp->connected, node, nnode, c))
-			bgp_connected_delete(bgp, c);
-
-		for (ALL_LIST_ELEMENTS(ifp->nbr_connected, node, nnode, nc))
-			bgp_nbr_connected_delete(bgp, nc, 1);
-
-		/* Fast external-failover */
-		if (!CHECK_FLAG(bgp->flags, BGP_FLAG_NO_FAST_EXT_FAILOVER)) {
-			for (ALL_LIST_ELEMENTS(bgp->peer, node, nnode, peer)) {
-				if ((peer->ttl != BGP_DEFAULT_TTL)
-				    && (peer->gtsm_hops
-					!= BGP_GTSM_HOPS_CONNECTED))
-					continue;
-
-				if (ifp == peer->nexthop.ifp)
-					BGP_EVENT_ADD(peer->connection,
-						      BGP_Stop);
-			}
-		}
-	}
-
-	if_update_to_new_vrf(ifp, new_vrf_id);
-
-	bgp = bgp_lookup_by_vrf_id(new_vrf_id);
-	if (!bgp)
-		return 0;
-
-	for (ALL_LIST_ELEMENTS(ifp->connected, node, nnode, c))
-		bgp_connected_add(bgp, c);
-
-	for (ALL_LIST_ELEMENTS(ifp->nbr_connected, node, nnode, nc))
-		bgp_nbr_connected_add(bgp, nc);
-
-	hook_call(bgp_vrf_status_changed, bgp, ifp);
-	return 0;
-}
-
 /* Zebra route add and delete treatment. */
 static int zebra_read_route(ZAPI_CALLBACK_ARGS)
 {
@@ -3401,7 +3341,6 @@ static zclient_handler *const bgp_handlers[] = {
 	[ZEBRA_INTERFACE_ADDRESS_DELETE] = bgp_interface_address_delete,
 	[ZEBRA_INTERFACE_NBR_ADDRESS_ADD] = bgp_interface_nbr_address_add,
 	[ZEBRA_INTERFACE_NBR_ADDRESS_DELETE] = bgp_interface_nbr_address_delete,
-	[ZEBRA_INTERFACE_VRF_UPDATE] = bgp_interface_vrf_update,
 	[ZEBRA_REDISTRIBUTE_ROUTE_ADD] = zebra_read_route,
 	[ZEBRA_REDISTRIBUTE_ROUTE_DEL] = zebra_read_route,
 	[ZEBRA_NEXTHOP_UPDATE] = bgp_read_nexthop_update,
diff --git a/lib/log.c b/lib/log.c
index df9b6c7176..ac31faa795 100644
--- a/lib/log.c
+++ b/lib/log.c
@@ -351,7 +351,6 @@ static const struct zebra_desc_table command_types[] = {
 	DESC_ENTRY(ZEBRA_VRF_ADD),
 	DESC_ENTRY(ZEBRA_VRF_DELETE),
 	DESC_ENTRY(ZEBRA_VRF_LABEL),
-	DESC_ENTRY(ZEBRA_INTERFACE_VRF_UPDATE),
 	DESC_ENTRY(ZEBRA_BFD_CLIENT_REGISTER),
 	DESC_ENTRY(ZEBRA_BFD_CLIENT_DEREGISTER),
 	DESC_ENTRY(ZEBRA_INTERFACE_ENABLE_RADV),
diff --git a/lib/zclient.h b/lib/zclient.h
index 2a3ce4e488..f18fc056fc 100644
--- a/lib/zclient.h
+++ b/lib/zclient.h
@@ -127,7 +127,6 @@ typedef enum {
 	ZEBRA_VRF_ADD,
 	ZEBRA_VRF_DELETE,
 	ZEBRA_VRF_LABEL,
-	ZEBRA_INTERFACE_VRF_UPDATE,
 	ZEBRA_BFD_CLIENT_REGISTER,
 	ZEBRA_BFD_CLIENT_DEREGISTER,
 	ZEBRA_INTERFACE_ENABLE_RADV,
diff --git a/ospfd/ospf_zebra.c b/ospfd/ospf_zebra.c
index abc580b13e..1af703d88d 100644
--- a/ospfd/ospf_zebra.c
+++ b/ospfd/ospf_zebra.c
@@ -162,29 +162,6 @@ static int ospf_interface_link_params(ZAPI_CALLBACK_ARGS)
 	return 0;
 }
 
-/* VRF update for an interface. */
-static int ospf_interface_vrf_update(ZAPI_CALLBACK_ARGS)
-{
-	struct interface *ifp = NULL;
-	vrf_id_t new_vrf_id;
-
-	ifp = zebra_interface_vrf_update_read(zclient->ibuf, vrf_id,
-					      &new_vrf_id);
-	if (!ifp)
-		return 0;
-
-	if (IS_DEBUG_OSPF_EVENT)
-		zlog_debug(
-			"%s: Rx Interface %s VRF change vrf_id %u New vrf %s id %u",
-			__func__, ifp->name, vrf_id,
-			ospf_vrf_id_to_name(new_vrf_id), new_vrf_id);
-
-	/*if_update(ifp, ifp->name, strlen(ifp->name), new_vrf_id);*/
-	if_update_to_new_vrf(ifp, new_vrf_id);
-
-	return 0;
-}
-
 /* Nexthop, ifindex, distance and metric information. */
 static void ospf_zebra_add_nexthop(struct ospf *ospf, struct ospf_path *path,
 				   struct zapi_route *api)
@@ -2203,7 +2180,6 @@ static zclient_handler *const ospf_handlers[] = {
 	[ZEBRA_INTERFACE_ADDRESS_ADD] = ospf_interface_address_add,
 	[ZEBRA_INTERFACE_ADDRESS_DELETE] = ospf_interface_address_delete,
 	[ZEBRA_INTERFACE_LINK_PARAMS] = ospf_interface_link_params,
-	[ZEBRA_INTERFACE_VRF_UPDATE] = ospf_interface_vrf_update,
 
 	[ZEBRA_REDISTRIBUTE_ROUTE_ADD] = ospf_zebra_read_route,
 	[ZEBRA_REDISTRIBUTE_ROUTE_DEL] = ospf_zebra_read_route,
diff --git a/pbrd/pbr_zebra.c b/pbrd/pbr_zebra.c
index e8a49b3176..876f9e19e0 100644
--- a/pbrd/pbr_zebra.c
+++ b/pbrd/pbr_zebra.c
@@ -129,29 +129,6 @@ int pbr_ifp_down(struct interface *ifp)
 	return 0;
 }
 
-static int interface_vrf_update(ZAPI_CALLBACK_ARGS)
-{
-	struct interface *ifp;
-	vrf_id_t new_vrf_id;
-
-	ifp = zebra_interface_vrf_update_read(zclient->ibuf, vrf_id,
-					      &new_vrf_id);
-
-	if (!ifp) {
-		DEBUGD(&pbr_dbg_zebra, "%s: VRF change interface not found",
-		       __func__);
-
-		return 0;
-	}
-
-	DEBUGD(&pbr_dbg_zebra, "%s: %s VRF change %u -> %u", __func__,
-	       ifp->name, vrf_id, new_vrf_id);
-
-	if_update_to_new_vrf(ifp, new_vrf_id);
-
-	return 0;
-}
-
 static int route_notify_owner(ZAPI_CALLBACK_ARGS)
 {
 	struct prefix p;
@@ -436,7 +413,6 @@ extern struct zebra_privs_t pbr_privs;
 static zclient_handler *const pbr_handlers[] = {
 	[ZEBRA_INTERFACE_ADDRESS_ADD] = interface_address_add,
 	[ZEBRA_INTERFACE_ADDRESS_DELETE] = interface_address_delete,
-	[ZEBRA_INTERFACE_VRF_UPDATE] = interface_vrf_update,
 	[ZEBRA_ROUTE_NOTIFY_OWNER] = route_notify_owner,
 	[ZEBRA_RULE_NOTIFY_OWNER] = rule_notify_owner,
 	[ZEBRA_NEXTHOP_UPDATE] = pbr_zebra_nexthop_update,
diff --git a/pimd/pim_zebra.c b/pimd/pim_zebra.c
index 92dcbf9d1d..62f00dbf86 100644
--- a/pimd/pim_zebra.c
+++ b/pimd/pim_zebra.c
@@ -51,39 +51,6 @@ static int pim_router_id_update_zebra(ZAPI_CALLBACK_ARGS)
 	return 0;
 }
 
-static int pim_zebra_interface_vrf_update(ZAPI_CALLBACK_ARGS)
-{
-	struct interface *ifp;
-	vrf_id_t new_vrf_id;
-	struct pim_instance *pim;
-	struct pim_interface *pim_ifp;
-
-	ifp = zebra_interface_vrf_update_read(zclient->ibuf, vrf_id,
-					      &new_vrf_id);
-	if (!ifp)
-		return 0;
-
-	if (PIM_DEBUG_ZEBRA)
-		zlog_debug("%s: %s updating from %u to %u", __func__, ifp->name,
-			   vrf_id, new_vrf_id);
-
-	pim = pim_get_pim_instance(new_vrf_id);
-	if (!pim)
-		return 0;
-
-	if_update_to_new_vrf(ifp, new_vrf_id);
-
-	pim_ifp = ifp->info;
-	if (!pim_ifp)
-		return 0;
-
-	pim_ifp->pim->mcast_if_count--;
-	pim_ifp->pim = pim;
-	pim_ifp->pim->mcast_if_count++;
-
-	return 0;
-}
-
 #ifdef PIM_DEBUG_IFADDR_DUMP
 static void dump_if_address(struct interface *ifp)
 {
@@ -463,7 +430,6 @@ static zclient_handler *const pim_handlers[] = {
 
 	[ZEBRA_NEXTHOP_UPDATE] = pim_parse_nexthop_update,
 	[ZEBRA_ROUTER_ID_UPDATE] = pim_router_id_update_zebra,
-	[ZEBRA_INTERFACE_VRF_UPDATE] = pim_zebra_interface_vrf_update,
 
 #if PIM_IPV == 4
 	[ZEBRA_VXLAN_SG_ADD] = pim_zebra_vxlan_sg_proc,
diff --git a/ripd/rip_interface.c b/ripd/rip_interface.c
index b58015a67d..505290ed31 100644
--- a/ripd/rip_interface.c
+++ b/ripd/rip_interface.c
@@ -383,31 +383,6 @@ static int rip_ifp_destroy(struct interface *ifp)
 	return 0;
 }
 
-/* VRF update for an interface. */
-int rip_interface_vrf_update(ZAPI_CALLBACK_ARGS)
-{
-	struct interface *ifp;
-	vrf_id_t new_vrf_id;
-
-	ifp = zebra_interface_vrf_update_read(zclient->ibuf, vrf_id,
-					      &new_vrf_id);
-	if (!ifp)
-		return 0;
-
-	if (IS_RIP_DEBUG_ZEBRA) {
-		struct vrf *nvrf = vrf_lookup_by_id(new_vrf_id);
-
-		zlog_debug("interface %s VRF change vrf %s(%u) new vrf %s(%u)",
-			   ifp->name, ifp->vrf->name, vrf_id, VRF_LOGNAME(nvrf),
-			   new_vrf_id);
-	}
-
-	if_update_to_new_vrf(ifp, new_vrf_id);
-	rip_interface_sync(ifp);
-
-	return 0;
-}
-
 static void rip_interface_clean(struct rip_interface *ri)
 {
 	ri->enable_network = 0;
diff --git a/ripd/rip_zebra.c b/ripd/rip_zebra.c
index 5bf51c2f15..36b58cb20b 100644
--- a/ripd/rip_zebra.c
+++ b/ripd/rip_zebra.c
@@ -222,7 +222,6 @@ static void rip_zebra_connected(struct zclient *zclient)
 zclient_handler *const rip_handlers[] = {
 	[ZEBRA_INTERFACE_ADDRESS_ADD] = rip_interface_address_add,
 	[ZEBRA_INTERFACE_ADDRESS_DELETE] = rip_interface_address_delete,
-	[ZEBRA_INTERFACE_VRF_UPDATE] = rip_interface_vrf_update,
 	[ZEBRA_REDISTRIBUTE_ROUTE_ADD] = rip_zebra_read_route,
 	[ZEBRA_REDISTRIBUTE_ROUTE_DEL] = rip_zebra_read_route,
 };
diff --git a/ripngd/ripng_interface.c b/ripngd/ripng_interface.c
index a37cb7d092..4cb4bb5ef3 100644
--- a/ripngd/ripng_interface.c
+++ b/ripngd/ripng_interface.c
@@ -264,31 +264,6 @@ static int ripng_ifp_destroy(struct interface *ifp)
 	return 0;
 }
 
-/* VRF update for an interface. */
-int ripng_interface_vrf_update(ZAPI_CALLBACK_ARGS)
-{
-	struct interface *ifp;
-	vrf_id_t new_vrf_id;
-
-	ifp = zebra_interface_vrf_update_read(zclient->ibuf, vrf_id,
-					      &new_vrf_id);
-	if (!ifp)
-		return 0;
-
-	if (IS_RIPNG_DEBUG_ZEBRA) {
-		struct vrf *nvrf = vrf_lookup_by_id(new_vrf_id);
-
-		zlog_debug("interface %s VRF change vrf %s(%u) new vrf %s(%u)",
-			   ifp->name, ifp->vrf->name, vrf_id, VRF_LOGNAME(nvrf),
-			   new_vrf_id);
-	}
-
-	if_update_to_new_vrf(ifp, new_vrf_id);
-	ripng_interface_sync(ifp);
-
-	return 0;
-}
-
 void ripng_interface_clean(struct ripng *ripng)
 {
 	struct interface *ifp;
diff --git a/ripngd/ripng_zebra.c b/ripngd/ripng_zebra.c
index 49b8a197ad..bb5a880c02 100644
--- a/ripngd/ripng_zebra.c
+++ b/ripngd/ripng_zebra.c
@@ -222,7 +222,6 @@ static void ripng_zebra_connected(struct zclient *zclient)
 static zclient_handler *const ripng_handlers[] = {
 	[ZEBRA_INTERFACE_ADDRESS_ADD] = ripng_interface_address_add,
 	[ZEBRA_INTERFACE_ADDRESS_DELETE] = ripng_interface_address_delete,
-	[ZEBRA_INTERFACE_VRF_UPDATE] = ripng_interface_vrf_update,
 	[ZEBRA_REDISTRIBUTE_ROUTE_ADD] = ripng_zebra_read_route,
 	[ZEBRA_REDISTRIBUTE_ROUTE_DEL] = ripng_zebra_read_route,
 };
diff --git a/ripngd/ripngd.h b/ripngd/ripngd.h
index c7468b6317..3a2bc0c9d3 100644
--- a/ripngd/ripngd.h
+++ b/ripngd/ripngd.h
@@ -413,7 +413,6 @@ extern int ripng_interface_add(ZAPI_CALLBACK_ARGS);
 extern int ripng_interface_delete(ZAPI_CALLBACK_ARGS);
 extern int ripng_interface_address_add(ZAPI_CALLBACK_ARGS);
 extern int ripng_interface_address_delete(ZAPI_CALLBACK_ARGS);
-extern int ripng_interface_vrf_update(ZAPI_CALLBACK_ARGS);
 extern void ripng_interface_sync(struct interface *ifp);
 
 extern struct ripng *ripng_lookup_by_vrf_id(vrf_id_t vrf_id);
diff --git a/zebra/interface.c b/zebra/interface.c
index 92ae8a9dc5..919cd11bc8 100644
--- a/zebra/interface.c
+++ b/zebra/interface.c
@@ -853,7 +853,7 @@ void if_handle_vrf_change(struct interface *ifp, vrf_id_t vrf_id)
 	if_down_del_nbr_connected(ifp);
 
 	/* Send out notification on interface VRF change. */
-	/* This is to issue an UPDATE or a DELETE, as appropriate. */
+	/* This is to issue a DELETE, as appropriate. */
 	zebra_interface_vrf_update_del(ifp, vrf_id);
 
 	if (if_is_vrf(ifp))
diff --git a/zebra/redistribute.c b/zebra/redistribute.c
index 7aa254b1cb..463c903daf 100644
--- a/zebra/redistribute.c
+++ b/zebra/redistribute.c
@@ -592,9 +592,8 @@ void zebra_interface_vrf_update_del(struct interface *ifp, vrf_id_t new_vrf_id)
 	struct zserv *client;
 
 	if (IS_ZEBRA_DEBUG_EVENT)
-		zlog_debug(
-			"MESSAGE: ZEBRA_INTERFACE_VRF_UPDATE/DEL %s VRF Id %u -> %u",
-			ifp->name, ifp->vrf->vrf_id, new_vrf_id);
+		zlog_debug("MESSAGE: ZEBRA_INTERFACE_DELETE %s VRF Id %u -> %u",
+			   ifp->name, ifp->vrf->vrf_id, new_vrf_id);
 
 	for (ALL_LIST_ELEMENTS(zrouter.client_list, node, nnode, client)) {
 		/* Do not send unsolicited messages to synchronous clients. */
@@ -606,7 +605,6 @@ void zebra_interface_vrf_update_del(struct interface *ifp, vrf_id_t new_vrf_id)
 		zsend_interface_update(ZEBRA_INTERFACE_DOWN, client, ifp);
 		client->ifdel_cnt++;
 		zsend_interface_delete(client, ifp);
-		zsend_interface_vrf_update(client, ifp, new_vrf_id);
 	}
 }
 
@@ -619,9 +617,8 @@ void zebra_interface_vrf_update_add(struct interface *ifp, vrf_id_t old_vrf_id)
 	struct zserv *client;
 
 	if (IS_ZEBRA_DEBUG_EVENT)
-		zlog_debug(
-			"MESSAGE: ZEBRA_INTERFACE_VRF_UPDATE/ADD %s VRF Id %u -> %u",
-			ifp->name, old_vrf_id, ifp->vrf->vrf_id);
+		zlog_debug("MESSAGE: ZEBRA_INTERFACE_ADD %s VRF Id %u -> %u",
+			   ifp->name, old_vrf_id, ifp->vrf->vrf_id);
 
 	for (ALL_LIST_ELEMENTS(zrouter.client_list, node, nnode, client)) {
 		/* Do not send unsolicited messages to synchronous clients. */
diff --git a/zebra/zapi_msg.c b/zebra/zapi_msg.c
index 86e4f2570c..859687b98d 100644
--- a/zebra/zapi_msg.c
+++ b/zebra/zapi_msg.c
@@ -435,27 +435,6 @@ int zsend_interface_addresses(struct zserv *client, struct interface *ifp)
 	return 0;
 }
 
-/* Notify client about interface moving from one VRF to another.
- * Whether client is interested in old and new VRF is checked by caller.
- */
-int zsend_interface_vrf_update(struct zserv *client, struct interface *ifp,
-			       vrf_id_t vrf_id)
-{
-	struct stream *s = stream_new(ZEBRA_MAX_PACKET_SIZ);
-
-	zclient_create_header(s, ZEBRA_INTERFACE_VRF_UPDATE, ifp->vrf->vrf_id);
-
-	/* Fill in the name of the interface and its new VRF (id) */
-	stream_put(s, ifp->name, INTERFACE_NAMSIZ);
-	stream_putl(s, vrf_id);
-
-	/* Write packet size. */
-	stream_putw_at(s, 0, stream_get_endp(s));
-
-	client->if_vrfchg_cnt++;
-	return zserv_send_message(client, s);
-}
-
 /* Add new nbr connected IPv6 address */
 void nbr_connected_add_ipv6(struct interface *ifp, struct in6_addr *address)
 {
diff --git a/zebra/zapi_msg.h b/zebra/zapi_msg.h
index ce8e154465..a01cbf675d 100644
--- a/zebra/zapi_msg.h
+++ b/zebra/zapi_msg.h
@@ -57,8 +57,6 @@ extern int zsend_redistribute_route(int cmd, struct zserv *zclient,
 
 extern int zsend_router_id_update(struct zserv *zclient, afi_t afi,
 				  struct prefix *p, vrf_id_t vrf_id);
-extern int zsend_interface_vrf_update(struct zserv *zclient,
-				      struct interface *ifp, vrf_id_t vrf_id);
 extern int zsend_interface_link_params(struct zserv *zclient,
 				       struct interface *ifp);
 extern int zsend_pw_update(struct zserv *client, struct zebra_pw *pw);