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net: dsa: export dsa_slave_dev_check

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Using the NETDEV_CHANGEUPPER notifications, drivers can be aware when
they are enslaved to e.g. a bridge by calling netif_is_bridge_master().

Export this helper from DSA to get the equivalent functionality of
determining whether the upper interface of a CHANGEUPPER notifier is a
DSA switch interface or not.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Vladimir Oltean 2021-01-07 03:24:01 +02:00 committed by Jakub Kicinski
parent f46b9b8ee8
commit a5e3c9ba92
3 changed files with 7 additions and 1 deletions
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6
include/net/dsa.h
View file

@ -860,6 +860,7 @@ int register_dsa_notifier(struct notifier_block *nb);
int unregister_dsa_notifier(struct notifier_block *nb);
int call_dsa_notifiers(unsigned long val, struct net_device *dev,
struct dsa_notifier_info *info);
bool dsa_slave_dev_check(const struct net_device *dev);
#else
static inline int register_dsa_notifier(struct notifier_block *nb)
{
@ -876,6 +877,11 @@ static inline int call_dsa_notifiers(unsigned long val, struct net_device *dev,
{
return NOTIFY_DONE;
}
static inline bool dsa_slave_dev_check(const struct net_device *dev)
{
return false;
}
#endif
netdev_tx_t dsa_enqueue_skb(struct sk_buff *skb, struct net_device *dev);

1
net/dsa/dsa_priv.h
View file

@ -184,7 +184,6 @@ extern const struct dsa_device_ops notag_netdev_ops;
void dsa_slave_mii_bus_init(struct dsa_switch *ds);
int dsa_slave_create(struct dsa_port *dp);
void dsa_slave_destroy(struct net_device *slave_dev);
bool dsa_slave_dev_check(const struct net_device *dev);
int dsa_slave_suspend(struct net_device *slave_dev);
int dsa_slave_resume(struct net_device *slave_dev);
int dsa_slave_register_notifier(void);

1
net/dsa/slave.c
View file

@ -1924,6 +1924,7 @@ bool dsa_slave_dev_check(const struct net_device *dev)
{
return dev->netdev_ops == &dsa_slave_netdev_ops;
}
EXPORT_SYMBOL_GPL(dsa_slave_dev_check);
static int dsa_slave_changeupper(struct net_device *dev,
struct netdev_notifier_changeupper_info *info)