Kernel/linux-next
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git synced 2025-01-07 22:42:04 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

ipvlan: Add handling of NETDEV_UP events

Browse Source 
When an ipvlan device is created on a bond device, the link state
of the ipvlan device may be abnormal. This is because bonding device
allows to add physical network card device in the down state and so
NETDEV_CHANGE event will not be notified to other listeners, so ipvlan
has no chance to update its link status.

The following steps can cause such problems:
	1) bond0 is down
	2) ip link add link bond0 name ipvlan type ipvlan mode l2
	3) echo +enp2s7 >/sys/class/net/bond0/bonding/slaves
	4) ip link set bond0 up

After these steps, use ip link command, we found ipvlan has NO-CARRIER:
  ipvlan@bond0: <NO-CARRIER, BROADCAST,MULTICAST,UP,M-DOWN> mtu ...>

We can deal with this problem like VLAN: Add handling of NETDEV_UP
events. If we receive NETDEV_UP event, we will update the link status
of the ipvlan.

Signed-off-by: Di Zhu <zhudi21@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Di Zhu 2021-07-29 21:19:30 +08:00 committed by David S. Miller
parent 3aa2605594
commit 57fb346cc7
1 changed files with 1 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/net/ipvlan/ipvlan_main.c
View File

@ -732,6 +732,7 @@ static int ipvlan_device_event(struct notifier_block *unused,
port = ipvlan_port_get_rtnl(dev);
switch (event) {
case NETDEV_UP:
case NETDEV_CHANGE:
list_for_each_entry(ipvlan, &port->ipvlans, pnode)
netif_stacked_transfer_operstate(ipvlan->phy_dev,