pbrd: Add `set vrf NAME` and `set vrf unchanged`

`set vrf NAME` allows the pbr map to point to an arbitrary vrf table.

`set vrf unchanged` will use the interface's vrf for table lookup.

Further, add functionality for pbr to respond to interface events
such as interface vrf changes & interface creation/deletion.

Ex)
ubuntu_nh# show pbr map
  pbr-map TEST valid: 1
    Seq: 1 rule: 300 Installed: 3(1) Reason: Valid
        SRC Match: 3.3.3.3/32
        VRF Unchanged (use interface vrf)
  pbr-map TEST2 valid: 1
    Seq: 2 rule: 301 Installed: 3(2) Reason: Valid
        SRC Match: 4.4.4.4/32
        VRF Lookup: vrf-red

root@ubuntu_nh:/home# ip rule show
0:      from all lookup local
300:    from 3.3.3.3 iif dummy2 lookup main
300:    from 3.3.3.3 iif dummyVRF lookup 1111
301:    from 4.4.4.4 iif dummy1 lookup 1111
301:    from 4.4.4.4 iif dummy3 lookup 1111

Signed-off-by: Stephen Worley <sworley@cumulusnetworks.com-

1 files changed, 1 insertions, 11 deletions

diff --git a/pbrd/pbr_nht.c b/pbrd/pbr_nht.c
index 7ccd14d1f1..5ab714e617 100644
--- a/pbrd/pbr_nht.c
+++ b/pbrd/pbr_nht.c
@@ -548,20 +548,10 @@ void pbr_nht_delete_individual_nexthop(struct pbr_map_sequence *pbrms)
 	struct pbr_nexthop_group_cache find;
 	struct pbr_nexthop_cache *pnhc;
 	struct pbr_nexthop_cache lup;
-	struct pbr_map *pbrm = pbrms->parent;
-	struct listnode *node;
-	struct pbr_map_interface *pmi;
 	struct nexthop *nh;
 	enum nexthop_types_t nh_type = 0;
 
-	if (pbrm->valid && pbrms->nhs_installed && pbrm->incoming->count) {
-		for (ALL_LIST_ELEMENTS_RO(pbrm->incoming, node, pmi))
-			pbr_send_pbr_map(pbrms, pmi, false);
-	}
-
-	pbrm->valid = false;
-	pbrms->nhs_installed = false;
-	pbrms->reason |= PBR_MAP_INVALID_NO_NEXTHOPS;
+	pbr_map_delete_nexthops(pbrms);
 
 	memset(&find, 0, sizeof(find));
 	snprintf(find.name, sizeof(find.name), "%s", pbrms->internal_nhg_name);