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zebra: fix mpls config on ifaces created post frr

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The mpls configuration does not work when an interface is
created after having applied the frr configuration. The
below scenario illustrates:

> root@dut:~# modprobe mpls
> root@dut:~# zebra &
> [..]
> dut(config)# interface ifacenotcreated
> dut(config-if)# mpls enable
> dut(config-if)# Ctrl-D
> root@dut:~# ip li show ifacenotcreated
> Device "ifacenotcreated" does not exist.
> root@dut:~# ip li add ifacenotcreated type dummy
> 0

Fix this by forcing the mpls flag when the interface is detected.

> root@dut:~# cat /proc/sys/net/mpls/conf/ifacenotcreat/input
> 1

Signed-off-by: Philippe Guibert <philippe.guibert@6wind.com>
This commit is contained in:
Philippe Guibert 2023-07-09 21:45:51 +02:00
parent 2ec7477a26
commit 71b0b0d3b3
1 changed files with 5 additions and 0 deletions
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5
zebra/interface.c
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@ -610,6 +610,11 @@ void if_add_update(struct interface *ifp)
if_addr_wakeup(ifp); if_addr_wakeup(ifp);
if (if_data->mpls_config == IF_ZEBRA_DATA_ON)
dplane_intf_mpls_modify_state(ifp, true);
else if (if_data->mpls_config == IF_ZEBRA_DATA_OFF)
dplane_intf_mpls_modify_state(ifp, false);
if (IS_ZEBRA_DEBUG_KERNEL) if (IS_ZEBRA_DEBUG_KERNEL)
zlog_debug( zlog_debug(
"interface %s vrf %s(%u) index %d becomes active.", "interface %s vrf %s(%u) index %d becomes active.",