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net: core: dev: Attach extack to NETDEV_PRE_UP 

Drivers may need to validate configuration of a device that's about to
be upped. Should the validation fail, there's currently no way to
communicate details of the failure to the user, beyond an error number.

To mend that, change __dev_open() to take an extack argument and pass it
from __dev_change_flags() and dev_open(), where it was propagated in the
previous patches.

Change __dev_open() to call call_netdevice_notifiers_extack() so that
the passed-in extack is attached to the NETDEV_PRE_UP notifier.

Signed-off-by: Petr Machata <petrm@mellanox.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Reviewed-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Petr Machata 2018-12-06 17:05:47 +00:00 committed by David S. Miller
parent 2637260534
commit 40c900aa1f
1 changed files with 4 additions and 4 deletions
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8
net/core/dev.c
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@ -1364,7 +1364,7 @@ void netdev_notify_peers(struct net_device *dev)
}
EXPORT_SYMBOL(netdev_notify_peers);
static int __dev_open(struct net_device *dev)
static int __dev_open(struct net_device *dev, struct netlink_ext_ack *extack)
{
const struct net_device_ops *ops = dev->netdev_ops;
int ret;
@ -1380,7 +1380,7 @@ static int __dev_open(struct net_device *dev)
*/
netpoll_poll_disable(dev);
ret = call_netdevice_notifiers(NETDEV_PRE_UP, dev);
ret = call_netdevice_notifiers_extack(NETDEV_PRE_UP, dev, extack);
ret = notifier_to_errno(ret);
if (ret)
return ret;
@ -1427,7 +1427,7 @@ int dev_open(struct net_device *dev, struct netlink_ext_ack *extack)
if (dev->flags & IFF_UP)
return 0;
ret = __dev_open(dev);
ret = __dev_open(dev, extack);
if (ret < 0)
return ret;
@ -7547,7 +7547,7 @@ int __dev_change_flags(struct net_device *dev, unsigned int flags,
if (old_flags & IFF_UP)
__dev_close(dev);
else
ret = __dev_open(dev);
ret = __dev_open(dev, extack);
}
if ((flags ^ dev->gflags) & IFF_PROMISC) {