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net: expose the master link to sysfs, and remove it from bond

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Currently, we can have only one master upper neighbour, so it would be
useful to create a symlink to it in the sysfs device directory, the way
that bonding now does it, for every device. Lower devices from
bridge/team/etc will automagically get it, so we could rely on it.

Also, remove the same functionality from bonding.

CC: Jay Vosburgh <fubar@us.ibm.com>
CC: Andy Gospodarek <andy@greyhouse.net>
CC: "David S. Miller" <davem@davemloft.net>
CC: Eric Dumazet <edumazet@google.com>
CC: Jiri Pirko <jiri@resnulli.us>
CC: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: Veaceslav Falico <vfalico@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Veaceslav Falico
2013-09-25 09:20:31 +02:00
committed by David S. Miller
parent 47701a36a3
commit 842d67a7b3
2 changed files with 20 additions and 19 deletions
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19
net/core/dev.c
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@@ -4584,6 +4584,7 @@ static int __netdev_adjacent_dev_insert(struct net_device *dev,
void *private, bool master)
{
struct netdev_adjacent *adj;
int ret;
adj = __netdev_find_adj(dev, adj_dev, dev_list);
@@ -4606,12 +4607,23 @@ static int __netdev_adjacent_dev_insert(struct net_device *dev,
adj_dev->name, dev->name, adj_dev->name);
/* Ensure that master link is always the first item in list. */
if (master)
if (master) {
ret = sysfs_create_link(&(dev->dev.kobj),
&(adj_dev->dev.kobj), "master");
if (ret)
goto free_adj;
list_add_rcu(&adj->list, dev_list);
else
} else {
list_add_tail_rcu(&adj->list, dev_list);
}
return 0;
free_adj:
kfree(adj);
return ret;
}
void __netdev_adjacent_dev_remove(struct net_device *dev,
@@ -4635,6 +4647,9 @@ void __netdev_adjacent_dev_remove(struct net_device *dev,
return;
}
if (adj->master)
sysfs_remove_link(&(dev->dev.kobj), "master");
list_del_rcu(&adj->list);
pr_debug("dev_put for %s, because link removed from %s to %s\n",
adj_dev->name, dev->name, adj_dev->name);