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net: add net device refcount tracker to struct netdev_adjacent

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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 20:22:10 -08:00 committed by Jakub Kicinski
parent 08d622568e
commit f77159a348
1 changed files with 4 additions and 3 deletions
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7
net/core/dev.c
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@ -6537,6 +6537,7 @@ static __latent_entropy void net_rx_action(struct softirq_action *h)
struct netdev_adjacent {
struct net_device *dev;
netdevice_tracker dev_tracker;
/* upper master flag, there can only be one master device per list */
bool master;
@ -7301,7 +7302,7 @@ static int __netdev_adjacent_dev_insert(struct net_device *dev,
adj->ref_nr = 1;
adj->private = private;
adj->ignore = false;
dev_hold(adj_dev);
dev_hold_track(adj_dev, &adj->dev_tracker, GFP_KERNEL);
pr_debug("Insert adjacency: dev %s adj_dev %s adj->ref_nr %d; dev_hold on %s\n",
dev->name, adj_dev->name, adj->ref_nr, adj_dev->name);
@ -7330,8 +7331,8 @@ remove_symlinks:
if (netdev_adjacent_is_neigh_list(dev, adj_dev, dev_list))
netdev_adjacent_sysfs_del(dev, adj_dev->name, dev_list);
free_adj:
dev_put_track(adj_dev, &adj->dev_tracker);
kfree(adj);
dev_put(adj_dev);
return ret;
}
@ -7372,7 +7373,7 @@ static void __netdev_adjacent_dev_remove(struct net_device *dev,
list_del_rcu(&adj->list);
pr_debug("adjacency: dev_put for %s, because link removed from %s to %s\n",
adj_dev->name, dev->name, adj_dev->name);
dev_put(adj_dev);
dev_put_track(adj_dev, &adj->dev_tracker);
kfree_rcu(adj, rcu);
}