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zebra: On if down/addr-del, process kernel routes

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Since we don't have a daemon who's job is to handle kernel
routes and we don't get an explicit route delete anymore if
nexthops become unreachable from the kernel, zebra must
re-process kernel routes itself to make sure they are still valid.

Signed-off-by: Stephen Worley <sworley@cumulusnetworks.com>
This commit is contained in:
Stephen Worley 2019-10-17 15:44:08 -04:00
parent a8c427ee39
commit 2a18114787
1 changed files with 10 additions and 0 deletions
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10
zebra/if_netlink.c
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@ -1104,6 +1104,14 @@ int netlink_interface_addr(struct nlmsghdr *h, ns_id_t ns_id, int startup)
NULL, ifa->ifa_prefixlen); NULL, ifa->ifa_prefixlen);
} }
/*
* Linux kernel does not send route delete on interface down/addr del
* so we have to re-process routes it owns (i.e. kernel routes)
*/
if (h->nlmsg_type != RTM_NEWADDR)
rib_update(RIB_UPDATE_KERNEL);
return 0; return 0;
} }
@ -1332,6 +1340,7 @@ int netlink_link_change(struct nlmsghdr *h, ns_id_t ns_id, int startup)
"Intf %s(%u) has gone DOWN", "Intf %s(%u) has gone DOWN",
name, ifp->ifindex); name, ifp->ifindex);
if_down(ifp); if_down(ifp);
rib_update(RIB_UPDATE_KERNEL);
} else if (if_is_operative(ifp)) { } else if (if_is_operative(ifp)) {
/* Must notify client daemons of new /* Must notify client daemons of new
* interface status. */ * interface status. */
@ -1371,6 +1380,7 @@ int netlink_link_change(struct nlmsghdr *h, ns_id_t ns_id, int startup)
"Intf %s(%u) has gone DOWN", "Intf %s(%u) has gone DOWN",
name, ifp->ifindex); name, ifp->ifindex);
if_down(ifp); if_down(ifp);
rib_update(RIB_UPDATE_KERNEL);
} }
} }