Commit 4cfab356 authored by Florian Fainelli's avatar Florian Fainelli Committed by David S. Miller
Browse files

net: dsa: Add wrappers for overloaded ndo_ops 



Add definitions for the dsa_netdevice_ops structure which is a subset of
the net_device_ops structure for the specific operations that we care
about overlaying on top of the DSA CPU port net_device and provide
inline stubs that take core managing whether DSA code is reachable.

Signed-off-by: default avatarFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent aad74d84

include/net/dsa.h

+70 −0
Original line number Diff line number Diff line
@@ -86,6 +86,18 @@ struct dsa_device_ops { 
	enum dsa_tag_protocol proto;

};



/* This structure defines the control interfaces that are overlayed by the

 * DSA layer on top of the DSA CPU/management net_device instance. This is

 * used by the core net_device layer while calling various net_device_ops

 * function pointers.

 */

struct dsa_netdevice_ops {

	int (*ndo_do_ioctl)(struct net_device *dev, struct ifreq *ifr,

			    int cmd);

	int (*ndo_get_phys_port_name)(struct net_device *dev, char *name,

				      size_t len);

};



#define DSA_TAG_DRIVER_ALIAS "dsa_tag-"

#define MODULE_ALIAS_DSA_TAG_DRIVER(__proto)				\

	MODULE_ALIAS(DSA_TAG_DRIVER_ALIAS __stringify(__proto##_VALUE))
@@ -217,6 +229,7 @@ struct dsa_port { 
	/*

	 * Original copy of the master netdev net_device_ops

	 */

	const struct dsa_netdevice_ops *netdev_ops;

	const struct net_device_ops *orig_ndo_ops;



	bool setup;
@@ -679,6 +692,63 @@ static inline bool dsa_can_decode(const struct sk_buff *skb, 
	return false;

}



#if IS_ENABLED(CONFIG_NET_DSA)

static inline int __dsa_netdevice_ops_check(struct net_device *dev)

{

	int err = -EOPNOTSUPP;



	if (!dev->dsa_ptr)

		return err;



	if (!dev->dsa_ptr->netdev_ops)

		return err;



	return 0;

}



static inline int dsa_ndo_do_ioctl(struct net_device *dev, struct ifreq *ifr,

				   int cmd)

{

	const struct dsa_netdevice_ops *ops;

	int err;



	err = __dsa_netdevice_ops_check(dev);

	if (err)

		return err;



	ops = dev->dsa_ptr->netdev_ops;



	return ops->ndo_do_ioctl(dev, ifr, cmd);

}



static inline int dsa_ndo_get_phys_port_name(struct net_device *dev,

					     char *name, size_t len)

{

	const struct dsa_netdevice_ops *ops;

	int err;



	err = __dsa_netdevice_ops_check(dev);

	if (err)

		return err;



	ops = dev->dsa_ptr->netdev_ops;



	return ops->ndo_get_phys_port_name(dev, name, len);

}

#else

static inline int dsa_ndo_do_ioctl(struct net_device *dev, struct ifreq *ifr,

				   int cmd)

{

	return -EOPNOTSUPP;

}



static inline int dsa_ndo_get_phys_port_name(struct net_device *dev,

					     char *name, size_t len)

{

	return -EOPNOTSUPP;

}

#endif



void dsa_unregister_switch(struct dsa_switch *ds);

int dsa_register_switch(struct dsa_switch *ds);

struct dsa_switch *dsa_switch_find(int tree_index, int sw_index);

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