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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
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@@ -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);