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bonding: force carrier update when releasing slave

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In __bond_release_one(), bond_set_carrier() is only called when bond
device has no slave. Therefore, if we remove the up slave from a master
with two slaves and keep the down slave, the master will remain up.

Fix this by moving bond_set_carrier() out of if (!bond_has_slaves(bond))
statement.

Reproducer:
$ insmod bonding.ko mode=0 miimon=100 max_bonds=2
$ ifconfig bond0 up
$ ifenslave bond0 eth0 eth1
$ ifconfig eth0 down
$ ifenslave -d bond0 eth1
$ cat /proc/net/bonding/bond0

Fixes: ff59c4563a8d ("[PATCH] bonding: support carrier state for master")
Signed-off-by: Zhang Changzhong <zhangchangzhong@huawei.com>
Acked-by: Jay Vosburgh <jay.vosburgh@canonical.com>
Link: https://lore.kernel.org/r/1645021088-38370-1-git-send-email-zhangchangzhong@huawei.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Zhang Changzhong 2022-02-16 22:18:08 +08:00 committed by Jakub Kicinski
parent 7dbcda584e
commit a6ab75cec1
1 changed files with 2 additions and 3 deletions
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5
drivers/net/bonding/bond_main.c
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@ -2379,10 +2379,9 @@ static int __bond_release_one(struct net_device *bond_dev,
bond_select_active_slave(bond);
}
if (!bond_has_slaves(bond)) {
bond_set_carrier(bond);
bond_set_carrier(bond);
if (!bond_has_slaves(bond))
eth_hw_addr_random(bond_dev);
}
unblock_netpoll_tx();
synchronize_rcu();