net: core: dev: Add extack argument to dev_open()

In order to pass extack together with NETDEV_PRE_UP notifications, it's
necessary to route the extack to __dev_open() from diverse (possibly
indirect) callers. One prominent API through which the notification is
invoked is dev_open().

Therefore extend dev_open() with and extra extack argument and update
all users. Most of the calls end up just encoding NULL, but bond and
team drivers have the extack readily available.

Signed-off-by: Petr Machata <[e-mail]>
Acked-by: Jiri Pirko <[e-mail]>
Reviewed-by: Ido Schimmel <[e-mail]>
Reviewed-by: David Ahern <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

drivers/net/bonding/bond_main.c

···
 	slave_dev->flags |= IFF_SLAVE;
 
 	/* open the slave since the application closed it */
-	res = dev_open(slave_dev);
+	res = dev_open(slave_dev, extack);
 	if (res) {
 		netdev_dbg(bond_dev, "Opening slave %s failed\n", slave_dev->name);
 		goto err_restore_mac;

drivers/net/ethernet/aquantia/atlantic/aq_ethtool.c

···
 		}
 	}
 	if (ndev_running)
-		err = dev_open(ndev);
+		err = dev_open(ndev, NULL);
 
 err_exit:
 	return err;

drivers/net/ethernet/cisco/enic/enic_ethtool.c

···
 	}
 	enic_init_vnic_resources(enic);
 	if (running) {
-		err = dev_open(netdev);
+		err = dev_open(netdev, NULL);
 		if (err)
 			goto err_out;
 	}

drivers/net/ethernet/hisilicon/hns/hns_ethtool.c

···
 		clear_bit(NIC_STATE_TESTING, &priv->state);
 
 		if (if_running)
-			(void)dev_open(ndev);
+			(void)dev_open(ndev, NULL);
 	}
 	/* Online tests aren't run; pass by default */
 

drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c

···
 	}
 
 	if (if_running)
-		ret = dev_open(ndev);
+		ret = dev_open(ndev, NULL);
 
 	return ret;
 }

drivers/net/ethernet/sfc/ethtool.c

···
 	/* We need rx buffers and interrupts. */
 	already_up = (efx->net_dev->flags & IFF_UP);
 	if (!already_up) {
-		rc = dev_open(efx->net_dev);
+		rc = dev_open(efx->net_dev, NULL);
 		if (rc) {
 			netif_err(efx, drv, efx->net_dev,
 				  "failed opening device.\n");

drivers/net/ethernet/sfc/falcon/ethtool.c

···
 	/* We need rx buffers and interrupts. */
 	already_up = (efx->net_dev->flags & IFF_UP);
 	if (!already_up) {
-		rc = dev_open(efx->net_dev);
+		rc = dev_open(efx->net_dev, NULL);
 		if (rc) {
 			netif_err(efx, drv, efx->net_dev,
 				  "failed opening device.\n");

drivers/net/ethernet/stmicro/stmmac/stmmac_main.c

···
 
 	set_bit(STMMAC_DOWN, &priv->state);
 	dev_close(priv->dev);
-	dev_open(priv->dev);
+	dev_open(priv->dev, NULL);
 	clear_bit(STMMAC_DOWN, &priv->state);
 	clear_bit(STMMAC_RESETING, &priv->state);
 	rtnl_unlock();

drivers/net/hyperv/netvsc_drv.c

···
 		 * slave as up. If open fails, then slave will be
 		 * still be offline (and not used).
 		 */
-		ret = dev_open(vf_netdev);
+		ret = dev_open(vf_netdev, NULL);
 		if (ret)
 			netdev_warn(net,
 				    "unable to open slave: %s: %d\n",
···
 	netif_addr_unlock_bh(ndev);
 
 	if (netif_running(ndev)) {
-		ret = dev_open(vf_netdev);
+		ret = dev_open(vf_netdev, NULL);
 		if (ret)
 			netdev_warn(vf_netdev,
 				    "unable to open: %d\n", ret);

drivers/net/net_failover.c

···
 
 	primary_dev = rtnl_dereference(nfo_info->primary_dev);
 	if (primary_dev) {
-		err = dev_open(primary_dev);
+		err = dev_open(primary_dev, NULL);
 		if (err)
 			goto err_primary_open;
 	}
 
 	standby_dev = rtnl_dereference(nfo_info->standby_dev);
 	if (standby_dev) {
-		err = dev_open(standby_dev);
+		err = dev_open(standby_dev, NULL);
 		if (err)
 			goto err_standby_open;
 	}
···
 	dev_hold(slave_dev);
 
 	if (netif_running(failover_dev)) {
-		err = dev_open(slave_dev);
+		err = dev_open(slave_dev, NULL);
 		if (err && (err != -EBUSY)) {
 			netdev_err(failover_dev, "Opening slave %s failed err:%d\n",
 				   slave_dev->name, err);
···
 	/* We need to bring up the slave after the rename by udev in case
 	 * open failed with EBUSY when it was registered.
 	 */
-	dev_open(slave_dev);
+	dev_open(slave_dev, NULL);
 
 	return 0;
 }

drivers/net/team/team.c

···
 		goto err_port_enter;
 	}
 
-	err = dev_open(port_dev);
+	err = dev_open(port_dev, extack);
 	if (err) {
 		netdev_dbg(dev, "Device %s opening failed\n",
 			   portname);

drivers/net/wireless/intersil/hostap/hostap_main.c

···
 		/* Master radio interface is needed for all operation, so open
 		 * it automatically when any virtual net_device is opened. */
 		local->master_dev_auto_open = 1;
-		dev_open(local->dev);
+		dev_open(local->dev, NULL);
 	}
 
 	netif_device_attach(dev);

drivers/s390/net/qeth_l2_main.c

···
 			qeth_l2_set_rx_mode(card->dev);
 		} else {
 			rtnl_lock();
-			dev_open(card->dev);
+			dev_open(card->dev, NULL);
 			rtnl_unlock();
 		}
 	}

drivers/s390/net/qeth_l3_main.c

···
 			__qeth_l3_open(card->dev);
 			qeth_l3_set_rx_mode(card->dev);
 		} else {
-			dev_open(card->dev);
+			dev_open(card->dev, NULL);
 		}
 		rtnl_unlock();
 	}

drivers/staging/fsl-dpaa2/ethsw/ethsw.c

···
 
 	for (i = 0; i < ethsw->sw_attr.num_ifs; i++) {
 		port_priv = ethsw->ports[i];
-		err = dev_open(port_priv->netdev);
+		err = dev_open(port_priv->netdev, NULL);
 		if (err) {
 			netdev_err(port_priv->netdev, "dev_open err %d\n", err);
 			return err;

drivers/staging/unisys/visornic/visornic_main.c

···
 	mod_timer(&devdata->irq_poll_timer, msecs_to_jiffies(2));
 
 	rtnl_lock();
-	dev_open(netdev);
+	dev_open(netdev, NULL);
 	rtnl_unlock();
 
 	complete_func(dev, 0);

include/linux/netdevice.h

···
 struct net_device *dev_get_by_name_rcu(struct net *net, const char *name);
 struct net_device *__dev_get_by_name(struct net *net, const char *name);
 int dev_alloc_name(struct net_device *dev, const char *name);
-int dev_open(struct net_device *dev);
+int dev_open(struct net_device *dev, struct netlink_ext_ack *extack);
 void dev_close(struct net_device *dev);
 void dev_close_many(struct list_head *head, bool unlink);
 void dev_disable_lro(struct net_device *dev);

net/bluetooth/6lowpan.c

···
 	int err;
 
 	rtnl_lock();
-	err = dev_open(netdev);
+	err = dev_open(netdev, NULL);
 	if (err < 0)
 		BT_INFO("iface %s cannot be opened (%d)", netdev->name, err);
 	rtnl_unlock();

net/core/dev.c

···
 
 /**
  *	dev_open	- prepare an interface for use.
- *	@dev:	device to open
+ *	@dev: device to open
+ *	@extack: netlink extended ack
  *
  *	Takes a device from down to up state. The device's private open
  *	function is invoked and then the multicast lists are loaded. Finally
···
  *	Calling this function on an active interface is a nop. On a failure
  *	a negative errno code is returned.
  */
-int dev_open(struct net_device *dev)
+int dev_open(struct net_device *dev, struct netlink_ext_ack *extack)
 {
 	int ret;
 

net/core/netpoll.c

···
 
 		np_info(np, "device %s not up yet, forcing it\n", np->dev_name);
 
-		err = dev_open(ndev);
+		err = dev_open(ndev, NULL);
 
 		if (err) {
 			np_err(np, "failed to open %s\n", ndev->name);

net/ipv4/ipmr.c

···
 			dev->flags |= IFF_MULTICAST;
 			if (!ipmr_init_vif_indev(dev))
 				goto failure;
-			if (dev_open(dev))
+			if (dev_open(dev, NULL))
 				goto failure;
 			dev_hold(dev);
 		}
···
 
 	if (!ipmr_init_vif_indev(dev))
 		goto failure;
-	if (dev_open(dev))
+	if (dev_open(dev, NULL))
 		goto failure;
 
 	dev_hold(dev);

net/ipv6/addrconf.c

···
 			dev = __dev_get_by_name(net, p.name);
 			if (!dev)
 				goto err_exit;
-			err = dev_open(dev);
+			err = dev_open(dev, NULL);
 		}
 	}
 #endif

net/ipv6/ip6mr.c

···
 		return NULL;
 	}
 
-	if (dev_open(dev))
+	if (dev_open(dev, NULL))
 		goto failure;
 
 	dev_hold(dev);