From f5bb1c558405aaac41b08b2ea71137db9db46e72 Mon Sep 17 00:00:00 2001
From: =?utf8?q?R=C3=A9mi=20Denis-Courmont?= <remi.denis-courmont@nokia.com>
Date: Wed, 9 Sep 2009 00:00:05 +0000
Subject: [PATCH] Phonet: back-end for autoconfigured addresses
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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>
---
include/linux/phonet.h | 17 +++++++++++++++++
net/phonet/pn_dev.c | 26 +++++++++++++++++++++++++-
2 files changed, 42 insertions(+), 1 deletion(-)
diff --git a/include/linux/phonet.h b/include/linux/phonet.h
index ee5e3c9e2bcaf..82b45d16e50cd 100644
--- a/include/linux/phonet.h
+++ b/include/linux/phonet.h
@@ -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
diff --git a/net/phonet/pn_dev.c b/net/phonet/pn_dev.c
index 5ae4c01e8388d..2f65dcaed2fb0 100644
--- a/net/phonet/pn_dev.c
+++ b/net/phonet/pn_dev.c
@@ -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;
}
--
2.30.2