Commit da7b9e9b authored by Florian Fainelli's avatar Florian Fainelli Committed by David S. Miller
Browse files

net: dsa: Add ndo_get_phys_port_name() for CPU port 



There is not currently way to infer the port number through sysfs that
is being used as the CPU port number. Overlay a ndo_get_phys_port_name()
operation onto the DSA master network device in order to retrieve that
information.

Signed-off-by: default avatarFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 44543f1d

include/net/dsa.h

+5 −0
Original line number Diff line number Diff line
@@ -208,6 +208,11 @@ struct dsa_port { 
	 * Original copy of the master netdev ethtool_ops

	 */

	const struct ethtool_ops *orig_ethtool_ops;



	/*

	 * Original copy of the master netdev net_device_ops

	 */

	const struct net_device_ops *orig_ndo_ops;

};



struct dsa_switch {

net/dsa/master.c

+55 −1
Original line number Diff line number Diff line
@@ -126,6 +126,17 @@ static void dsa_master_get_strings(struct net_device *dev, uint32_t stringset, 
	}

}



static int dsa_master_get_phys_port_name(struct net_device *dev,

					 char *name, size_t len)

{

	struct dsa_port *cpu_dp = dev->dsa_ptr;



	if (snprintf(name, len, "p%d", cpu_dp->index) >= len)

		return -EINVAL;



	return 0;

}



static int dsa_master_ethtool_setup(struct net_device *dev)

{

	struct dsa_port *cpu_dp = dev->dsa_ptr;
@@ -158,6 +169,38 @@ static void dsa_master_ethtool_teardown(struct net_device *dev) 
	cpu_dp->orig_ethtool_ops = NULL;

}



static int dsa_master_ndo_setup(struct net_device *dev)

{

	struct dsa_port *cpu_dp = dev->dsa_ptr;

	struct dsa_switch *ds = cpu_dp->ds;

	struct net_device_ops *ops;



	if (dev->netdev_ops->ndo_get_phys_port_name)

		return 0;



	ops = devm_kzalloc(ds->dev, sizeof(*ops), GFP_KERNEL);

	if (!ops)

		return -ENOMEM;



	cpu_dp->orig_ndo_ops = dev->netdev_ops;

	if (cpu_dp->orig_ndo_ops)

		memcpy(ops, cpu_dp->orig_ndo_ops, sizeof(*ops));



	ops->ndo_get_phys_port_name = dsa_master_get_phys_port_name;



	dev->netdev_ops  = ops;



	return 0;

}



static void dsa_master_ndo_teardown(struct net_device *dev)

{

	struct dsa_port *cpu_dp = dev->dsa_ptr;



	dev->netdev_ops = cpu_dp->orig_ndo_ops;

	cpu_dp->orig_ndo_ops = NULL;

}



static ssize_t tagging_show(struct device *d, struct device_attribute *attr,

			    char *buf)

{
@@ -223,16 +266,27 @@ int dsa_master_setup(struct net_device *dev, struct dsa_port *cpu_dp) 
	if (ret)

		return ret;



	ret = dsa_master_ndo_setup(dev);

	if (ret)

		goto out_err_ethtool_teardown;



	ret = sysfs_create_group(&dev->dev.kobj, &dsa_group);

	if (ret)

		dsa_master_ethtool_teardown(dev);

		goto out_err_ndo_teardown;



	return ret;



out_err_ndo_teardown:

	dsa_master_ndo_teardown(dev);

out_err_ethtool_teardown:

	dsa_master_ethtool_teardown(dev);

	return ret;

}



void dsa_master_teardown(struct net_device *dev)

{

	sysfs_remove_group(&dev->dev.kobj, &dsa_group);

	dsa_master_ndo_teardown(dev);

	dsa_master_ethtool_teardown(dev);

	dsa_master_reset_mtu(dev);

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