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macvlan: Change status when lower device goes down

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Today macvlan ignores the notification when a lower device goes
administratively down, preventing the lack of connectivity from
bubbling up.

Processing NETDEV_DOWN results in a macvlan state of LOWERLAYERDOWN
with NO-CARRIER which should be easy to interpret in userspace.

2: lower: <BROADCAST,MULTICAST> mtu 1500 qdisc mq state DOWN mode DEFAULT group default qlen 1000
3: macvlan@lower: <NO-CARRIER,BROADCAST,MULTICAST,UP,M-DOWN> mtu 1500 qdisc noqueue state LOWERLAYERDOWN mode DEFAULT group default qlen 1000

Signed-off-by: Suresh Krishnan <skrishnan@arista.com>
Signed-off-by: Travis Brown <travisb@arista.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Travis Brown 2018-07-10 00:35:01 +00:00 committed by David S. Miller
parent 0e97c4fb18
commit 80fd2d6ca5
1 changed files with 1 additions and 0 deletions
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1
drivers/net/macvlan.c
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@ -1641,6 +1641,7 @@ static int macvlan_device_event(struct notifier_block *unused,
switch (event) {
case NETDEV_UP:
case NETDEV_DOWN:
case NETDEV_CHANGE:
list_for_each_entry(vlan, &port->vlans, list)
netif_stacked_transfer_operstate(vlan->lowerdev,