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Commit f5bb1c55 authored by Rémi Denis-Courmont's avatar Rémi Denis-Courmont Committed by David S. Miller
Browse files

Phonet: back-end for autoconfigured addresses 



In some cases, the network device driver knows what layer-3 address the
device should have. This adds support for the Phonet stack to
automatically request from the driver and add that address to the
network device.

Signed-off-by: default avatarRémi Denis-Courmont <remi.denis-courmont@nokia.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 998ec759

include/linux/phonet.h

+17 −0
Original line number Diff line number Diff line
@@ -170,4 +170,21 @@ static inline __u8 pn_sockaddr_get_resource(const struct sockaddr_pn *spn) 
	return spn->spn_resource;

}



/* Phonet device ioctl requests */

#ifdef __KERNEL__

#define SIOCPNGAUTOCONF		(SIOCDEVPRIVATE + 0)



struct if_phonet_autoconf {

	uint8_t device;

};



struct if_phonet_req {

	char ifr_phonet_name[16];

	union {

		struct if_phonet_autoconf ifru_phonet_autoconf;

	} ifr_ifru;

};

#define ifr_phonet_autoconf ifr_ifru.ifru_phonet_autoconf

#endif /* __KERNEL__ */



#endif

net/phonet/pn_dev.c

+25 −1
Original line number Diff line number Diff line
@@ -28,6 +28,7 @@ 
#include <linux/netdevice.h>

#include <linux/phonet.h>

#include <linux/proc_fs.h>

#include <linux/if_arp.h>

#include <net/sock.h>

#include <net/netns/generic.h>

#include <net/phonet/pn_dev.h>
@@ -195,14 +196,37 @@ found: 
	return err;

}



/* automatically configure a Phonet device, if supported */

static int phonet_device_autoconf(struct net_device *dev)

{

	struct if_phonet_req req;

	int ret;



	if (!dev->netdev_ops->ndo_do_ioctl)

		return -EOPNOTSUPP;



	ret = dev->netdev_ops->ndo_do_ioctl(dev, (struct ifreq *)&req,

						SIOCPNGAUTOCONF);

	if (ret < 0)

		return ret;

	return phonet_address_add(dev, req.ifr_phonet_autoconf.device);

}



/* notify Phonet of device events */

static int phonet_device_notify(struct notifier_block *me, unsigned long what,

				void *arg)

{

	struct net_device *dev = arg;



	if (what == NETDEV_UNREGISTER)

	switch (what) {

	case NETDEV_REGISTER:

		if (dev->type == ARPHRD_PHONET)

			phonet_device_autoconf(dev);

		break;

	case NETDEV_UNREGISTER:

		phonet_device_destroy(dev);

		break;

	}

	return 0;



}