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Commit 4bf84c35 authored by Jiri Pirko's avatar Jiri Pirko Committed by David S. Miller
Browse files

net: add change_carrier netdev op 



This allows a driver to register change_carrier callback which will be
called whenever user will like to change carrier state. This is useful
for devices like dummy, gre, team and so on.

Signed-off-by: default avatarJiri Pirko <jiri@resnulli.us>
Acked-by: default avatarFlavio Leitner <fbl@redhat.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent b5a05550

include/linux/netdevice.h

+12 −0
Original line number Diff line number Diff line
@@ -891,6 +891,14 @@ struct netdev_fcoe_hbainfo { 
 * int (*ndo_bridge_setlink)(struct net_device *dev, struct nlmsghdr *nlh)

 * int (*ndo_bridge_getlink)(struct sk_buff *skb, u32 pid, u32 seq,

 *			     struct net_device *dev)

 *

 * int (*ndo_change_carrier)(struct net_device *dev, bool new_carrier);

 *	Called to change device carrier. Soft-devices (like dummy, team, etc)

 *	which do not represent real hardware may define this to allow their

 *	userspace components to manage their virtual carrier state. Devices

 *	that determine carrier state from physical hardware properties (eg

 *	network cables) or protocol-dependent mechanisms (eg

 *	USB_CDC_NOTIFY_NETWORK_CONNECTION) should NOT implement this function.

 */

struct net_device_ops {

	int			(*ndo_init)(struct net_device *dev);
@@ -1008,6 +1016,8 @@ struct net_device_ops { 
	int			(*ndo_bridge_getlink)(struct sk_buff *skb,

						      u32 pid, u32 seq,

						      struct net_device *dev);

	int			(*ndo_change_carrier)(struct net_device *dev,

						      bool new_carrier);

};



/*
@@ -2194,6 +2204,8 @@ extern int dev_set_mtu(struct net_device *, int); 
extern void		dev_set_group(struct net_device *, int);

extern int		dev_set_mac_address(struct net_device *,

					    struct sockaddr *);

extern int		dev_change_carrier(struct net_device *,

					   bool new_carrier);

extern int		dev_hard_start_xmit(struct sk_buff *skb,

					    struct net_device *dev,

					    struct netdev_queue *txq);

net/core/dev.c

+19 −0
Original line number Diff line number Diff line
@@ -5027,6 +5027,25 @@ int dev_set_mac_address(struct net_device *dev, struct sockaddr *sa) 
}

EXPORT_SYMBOL(dev_set_mac_address);



/**

 *	dev_change_carrier - Change device carrier

 *	@dev: device

 *	@new_carries: new value

 *

 *	Change device carrier

 */

int dev_change_carrier(struct net_device *dev, bool new_carrier)

{

	const struct net_device_ops *ops = dev->netdev_ops;



	if (!ops->ndo_change_carrier)

		return -EOPNOTSUPP;

	if (!netif_device_present(dev))

		return -ENODEV;

	return ops->ndo_change_carrier(dev, new_carrier);

}

EXPORT_SYMBOL(dev_change_carrier);



/*

 *	Perform the SIOCxIFxxx calls, inside rcu_read_lock()

 */