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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: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Florian Fainelli 2020-07-19 20:49:52 -07:00 committed by David S. Miller
parent aad74d849d
commit 4cfab35667
1 changed files with 70 additions and 0 deletions
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70
include/net/dsa.h
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@ -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);