[PATCHv2 net-next] bonding: 3ad: send ifinfo notify when mux state changed

[Hangbin Liu <liuhangbin@gmail.com>]

Currently, administrators need to retrieve LACP mux state changes from
the kernel DEBUG log using netdev_dbg and slave_dbg macros. To simplify
this process, let's send the ifinfo notification whenever the mux state
changes. This will enable users to directly access and monitor this
information using the ip monitor command.

Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
---
v2: don't use call_netdevice_notifiers as it will case sleeping in atomic
    context (Nikolay Aleksandrov)
---
 drivers/net/bonding/bond_3ad.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/bonding/bond_3ad.c b/drivers/net/bonding/bond_3ad.c
index c6807e473ab7..7a7224bf1894 100644
--- a/drivers/net/bonding/bond_3ad.c
+++ b/drivers/net/bonding/bond_3ad.c
@@ -1185,6 +1185,8 @@ static void ad_mux_machine(struct port *port, bool *update_slave_arr)
 		default:
 			break;
 		}
+
+		rtmsg_ifinfo(RTM_NEWLINK, port->slave->dev, 0, GFP_KERNEL, 0, NULL);
 	}
 }
 
-- 
2.45.0