pimd: Prevent Lockup when waiting for response from zebra

When we have vrf config that we have not fully setup yet,
(ie zebra knows nothing about it yet), when attempting to
do a nexthop_lookup, zebra will just drop the request
if it doesn't know about the vrf.

In this case, we need to safely not ask for the information

Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>

diff --git a/pimd/pim_zlookup.c b/pimd/pim_zlookup.c
index 3fe2f4d92ace5b27d208f587b648ce63924d695c..a60baba73df848b279fcbafa97d23645362680f8 100644 (file)
--- a/pimd/pim_zlookup.c
+++ b/pimd/pim_zlookup.c
@@ -316,6 +316,13 @@ static int zclient_lookup_nexthop_once(struct pim_instance *pim,
                return -1;
        }
 
+       if (pim->vrf->vrf_id == VRF_UNKNOWN) {
+               zlog_err(
+                       "%s: VRF: %s does not fully exist yet, delaying lookup",
+                       __PRETTY_FUNCTION__, pim->vrf->name);
+               return -1;
+       }
+
        s = zlookup->obuf;
        stream_reset(s);
        zclient_create_header(s, ZEBRA_IPV4_NEXTHOP_LOOKUP_MRIB, pim->vrf_id);