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net: failover: add net device refcount tracker

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Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Eric Dumazet 2021-12-04 20:22:15 -08:00 committed by Jakub Kicinski
parent 63f13937cb
commit 095e200f17
2 changed files with 3 additions and 2 deletions
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1
include/net/failover.h
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@ -25,6 +25,7 @@ struct failover_ops {
struct failover { struct failover {
struct list_head list; struct list_head list;
struct net_device __rcu *failover_dev; struct net_device __rcu *failover_dev;
netdevice_tracker dev_tracker;
struct failover_ops __rcu *ops; struct failover_ops __rcu *ops;
}; };

4
net/core/failover.c
View File

@ -252,7 +252,7 @@ struct failover *failover_register(struct net_device *dev,
return ERR_PTR(-ENOMEM); return ERR_PTR(-ENOMEM);
rcu_assign_pointer(failover->ops, ops); rcu_assign_pointer(failover->ops, ops);
dev_hold(dev); dev_hold_track(dev, &failover->dev_tracker, GFP_KERNEL);
dev->priv_flags |= IFF_FAILOVER; dev->priv_flags |= IFF_FAILOVER;
rcu_assign_pointer(failover->failover_dev, dev); rcu_assign_pointer(failover->failover_dev, dev);
@ -285,7 +285,7 @@ void failover_unregister(struct failover *failover)
failover_dev->name); failover_dev->name);
failover_dev->priv_flags &= ~IFF_FAILOVER; failover_dev->priv_flags &= ~IFF_FAILOVER;
dev_put(failover_dev); dev_put_track(failover_dev, &failover->dev_tracker);
spin_lock(&failover_lock); spin_lock(&failover_lock);
list_del(&failover->list); list_del(&failover->list);