linux-kernel - [PATCH net-next] Add handling of NETDEV

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Date: Sun, 31 Mar 2024 06:41:28 -0700
From: Venkat Venkatsubra <venkat.x.venkatsubra@...cle.com>
To: davem@...emloft.net, netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        maheshb@...gle.com, edumazet@...gle.com
Cc: gia-khanh.nguyen@...cle.com
Subject: [PATCH net-next] Add handling of NETDEV_DOWN event

When ethP is the parent interface of ipvlan interface ethC,
and you do

# ip link set ethP down

ethC's link state is not brought down.

In the below example, ens5 is the host interface which is the 
parent of the ipvlan interface eth0 in the container.

Host:

[root@...-podman-x64 ~]# ip link set ens5 down
[root@...-podman-x64 ~]# ip -d link show dev ens5
3: ens5: <BROADCAST,MULTICAST> mtu 9000 qdisc mq state DOWN 
      ...
[root@...-podman-x64 ~]#

Container:

[root@...tnode-ol8 /]# ip -d link show dev eth0
2: eth0@if3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 9000 state UNKNOWN 
        ...
    ipvlan mode l2 bridge 
[root@...tnode-ol8 /]#

eth0 continues to remain UP.

macvlan already addresses this handling of NETDEV_DOWN event.
Adding the same functionality to ipvlan.

Venkat Venkatsubra (1):
  ipvlan: handle NETDEV_DOWN event

 drivers/net/ipvlan/ipvlan_main.c | 1 +
 1 file changed, 1 insertion(+)

-- 
1.8.3.1