/* helper function called by if_netlink_change
* to delete interfaces in case the interface moved
* to an other netns
*/
static void if_netlink_check_ifp_instance_consistency(uint16_t cmd,
struct interface *ifp,
ns_id_t ns_id)
{
struct interface *other_ifp;
/*
* look if interface name is also found on other netns
* - only if vrf backend is netns
* - do not concern lo interface
* - then remove previous one
* - for new link case, check found interface is not active
*/
if (!vrf_is_backend_netns() ||
!strcmp(ifp->name, "lo"))
return;
other_ifp = if_lookup_by_name_not_ns(ns_id, ifp->name);
if (!other_ifp)
return;
/* because previous interface may be inactive,
* interface is moved back to default vrf
* then one may find the same pointer; ignore
*/
if (other_ifp == ifp)
return;
if ((cmd == RTM_NEWLINK)
&& (CHECK_FLAG(other_ifp->status, ZEBRA_INTERFACE_ACTIVE)))
return;
if (IS_ZEBRA_DEBUG_KERNEL && cmd == RTM_NEWLINK) {
zlog_debug("RTM_NEWLINK %s(%u, VRF %u) replaces %s(%u, VRF %u)\n",
ifp->name,
ifp->ifindex,
ifp->vrf_id,
other_ifp->name,
other_ifp->ifindex,
other_ifp->vrf_id);
} else if (IS_ZEBRA_DEBUG_KERNEL && cmd == RTM_DELLINK) {
zlog_debug("RTM_DELLINK %s(%u, VRF %u) is replaced by %s(%u, VRF %u)\n",
ifp->name,
ifp->ifindex,
ifp->vrf_id,
other_ifp->name,
other_ifp->ifindex,
other_ifp->vrf_id);
}
/* the found interface replaces the current one
* remove it
*/
if (cmd == RTM_DELLINK)
if_delete(ifp);
else
if_delete(other_ifp);
/* the found interface is replaced by the current one
* suppress it
*/
}
/* Interface adding function */
int
ifan_read (struct if_announcemsghdr *ifan)
{
struct interface *ifp;
ifp = if_lookup_by_index (ifan->ifan_index);
if (ifp == NULL && ifan->ifan_what == IFAN_ARRIVAL)
{
/* Create Interface */
ifp = if_get_by_name (ifan->ifan_name);
ifp->ifindex = ifan->ifan_index;
if_add_update (ifp);
}
else if (ifp != NULL && ifan->ifan_what == IFAN_DEPARTURE)
{
if_delete_update (ifp);
if_delete (ifp);
}
if_get_flags (ifp);
if_get_mtu (ifp);
if_get_metric (ifp);
if (IS_ZEBRA_DEBUG_KERNEL)
zlog_info ("interface %s index %d", ifp->name, ifp->ifindex);
return 0;
}
int
isis_zebra_if_del (int command, struct zclient *zclient, zebra_size_t length)
{
struct interface *ifp;
struct stream *s;
s = zclient->ibuf;
ifp = zebra_interface_state_read (s);
if (!ifp)
return 0;
if (if_is_operative (ifp))
zlog_warn ("Zebra: got delete of %s, but interface is still up",
ifp->name);
zlog_debug ("Zebra I/F delete: %s index %d flags %ld metric %d mtu %d",
ifp->name, ifp->ifindex, ifp->flags, ifp->metric, ifp->mtu);
if_delete (ifp);
isis_csm_state_change (IF_DOWN_FROM_Z, circuit_scan_by_ifp (ifp), ifp);
return 0;
}
static void ospf_vl_if_delete(struct ospf_vl_data *vl_data)
{
struct interface *ifp = vl_data->vl_oi->ifp;
vl_data->vl_oi->address->u.prefix4.s_addr = 0;
vl_data->vl_oi->address->prefixlen = 0;
ospf_if_free(vl_data->vl_oi);
if_delete(ifp);
vlink_count--;
}
