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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: Rémi Denis-Courmont <remi.denis-courmont@nokia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Rémi Denis-Courmont 2009-09-09 00:00:05 +00:00 committed by David S. Miller
parent 998ec759ef
commit f5bb1c5584
2 changed files with 42 additions and 1 deletions
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17
include/linux/phonet.h
View File

@ -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

26
net/phonet/pn_dev.c
View File

@ -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;
}