Initial import

1 files changed, 1446 insertions, 0 deletions

diff --git a/net/decnet/dn_dev.c b/net/decnet/dn_dev.c
new file mode 100644
index 000000000..b2c26b081
--- /dev/null
+++ b/net/decnet/dn_dev.c
@@ -0,0 +1,1446 @@
+/*
+ * DECnet       An implementation of the DECnet protocol suite for the LINUX
+ *              operating system.  DECnet is implemented using the  BSD Socket
+ *              interface as the means of communication with the user level.
+ *
+ *              DECnet Device Layer
+ *
+ * Authors:     Steve Whitehouse <SteveW@ACM.org>
+ *              Eduardo Marcelo Serrat <emserrat@geocities.com>
+ *
+ * Changes:
+ *          Steve Whitehouse : Devices now see incoming frames so they
+ *                             can mark on who it came from.
+ *          Steve Whitehouse : Fixed bug in creating neighbours. Each neighbour
+ *                             can now have a device specific setup func.
+ *          Steve Whitehouse : Added /proc/sys/net/decnet/conf/<dev>/
+ *          Steve Whitehouse : Fixed bug which sometimes killed timer
+ *          Steve Whitehouse : Multiple ifaddr support
+ *          Steve Whitehouse : SIOCGIFCONF is now a compile time option
+ *          Steve Whitehouse : /proc/sys/net/decnet/conf/<sys>/forwarding
+ *          Steve Whitehouse : Removed timer1 - it's a user space issue now
+ *         Patrick Caulfield : Fixed router hello message format
+ *          Steve Whitehouse : Got rid of constant sizes for blksize for
+ *                             devices. All mtu based now.
+ */
+
+#include <linux/capability.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/init.h>
+#include <linux/net.h>
+#include <linux/netdevice.h>
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
+#include <linux/timer.h>
+#include <linux/string.h>
+#include <linux/if_addr.h>
+#include <linux/if_arp.h>
+#include <linux/if_ether.h>
+#include <linux/skbuff.h>
+#include <linux/sysctl.h>
+#include <linux/notifier.h>
+#include <linux/slab.h>
+#include <linux/jiffies.h>
+#include <asm/uaccess.h>
+#include <net/net_namespace.h>
+#include <net/neighbour.h>
+#include <net/dst.h>
+#include <net/flow.h>
+#include <net/fib_rules.h>
+#include <net/netlink.h>
+#include <net/dn.h>
+#include <net/dn_dev.h>
+#include <net/dn_route.h>
+#include <net/dn_neigh.h>
+#include <net/dn_fib.h>
+
+#define DN_IFREQ_SIZE (sizeof(struct ifreq) - sizeof(struct sockaddr) + sizeof(struct sockaddr_dn))
+
+static char dn_rt_all_end_mcast[ETH_ALEN] = {0xAB,0x00,0x00,0x04,0x00,0x00};
+static char dn_rt_all_rt_mcast[ETH_ALEN]  = {0xAB,0x00,0x00,0x03,0x00,0x00};
+static char dn_hiord[ETH_ALEN]            = {0xAA,0x00,0x04,0x00,0x00,0x00};
+static unsigned char dn_eco_version[3]    = {0x02,0x00,0x00};
+
+extern struct neigh_table dn_neigh_table;
+
+/*
+ * decnet_address is kept in network order.
+ */
+__le16 decnet_address = 0;
+
+static DEFINE_SPINLOCK(dndev_lock);
+static struct net_device *decnet_default_device;
+static BLOCKING_NOTIFIER_HEAD(dnaddr_chain);
+
+static struct dn_dev *dn_dev_create(struct net_device *dev, int *err);
+static void dn_dev_delete(struct net_device *dev);
+static void dn_ifaddr_notify(int event, struct dn_ifaddr *ifa);
+
+static int dn_eth_up(struct net_device *);
+static void dn_eth_down(struct net_device *);
+static void dn_send_brd_hello(struct net_device *dev, struct dn_ifaddr *ifa);
+static void dn_send_ptp_hello(struct net_device *dev, struct dn_ifaddr *ifa);
+
+static struct dn_dev_parms dn_dev_list[] =  {
+{
+	.type =		ARPHRD_ETHER, /* Ethernet */
+	.mode =		DN_DEV_BCAST,
+	.state =	DN_DEV_S_RU,
+	.t2 =		1,
+	.t3 =		10,
+	.name =		"ethernet",
+	.up =		dn_eth_up,
+	.down = 	dn_eth_down,
+	.timer3 =	dn_send_brd_hello,
+},
+{
+	.type =		ARPHRD_IPGRE, /* DECnet tunneled over GRE in IP */
+	.mode =		DN_DEV_BCAST,
+	.state =	DN_DEV_S_RU,
+	.t2 =		1,
+	.t3 =		10,
+	.name =		"ipgre",
+	.timer3 =	dn_send_brd_hello,
+},
+#if 0
+{
+	.type =		ARPHRD_X25, /* Bog standard X.25 */
+	.mode =		DN_DEV_UCAST,
+	.state =	DN_DEV_S_DS,
+	.t2 =		1,
+	.t3 =		120,
+	.name =		"x25",
+	.timer3 =	dn_send_ptp_hello,
+},
+#endif
+#if 0
+{
+	.type =		ARPHRD_PPP, /* DECnet over PPP */
+	.mode =		DN_DEV_BCAST,
+	.state =	DN_DEV_S_RU,
+	.t2 =		1,
+	.t3 =		10,
+	.name =		"ppp",
+	.timer3 =	dn_send_brd_hello,
+},
+#endif
+{
+	.type =		ARPHRD_DDCMP, /* DECnet over DDCMP */
+	.mode =		DN_DEV_UCAST,
+	.state =	DN_DEV_S_DS,
+	.t2 =		1,
+	.t3 =		120,
+	.name =		"ddcmp",
+	.timer3 =	dn_send_ptp_hello,
+},
+{
+	.type =		ARPHRD_LOOPBACK, /* Loopback interface - always last */
+	.mode =		DN_DEV_BCAST,
+	.state =	DN_DEV_S_RU,
+	.t2 =		1,
+	.t3 =		10,
+	.name =		"loopback",
+	.timer3 =	dn_send_brd_hello,
+}
+};
+
+#define DN_DEV_LIST_SIZE ARRAY_SIZE(dn_dev_list)
+
+#define DN_DEV_PARMS_OFFSET(x) offsetof(struct dn_dev_parms, x)
+
+#ifdef CONFIG_SYSCTL
+
+static int min_t2[] = { 1 };
+static int max_t2[] = { 60 }; /* No max specified, but this seems sensible */
+static int min_t3[] = { 1 };
+static int max_t3[] = { 8191 }; /* Must fit in 16 bits when multiplied by BCT3MULT or T3MULT */
+
+static int min_priority[1];
+static int max_priority[] = { 127 }; /* From DECnet spec */
+
+static int dn_forwarding_proc(struct ctl_table *, int,
+			void __user *, size_t *, loff_t *);
+static struct dn_dev_sysctl_table {
+	struct ctl_table_header *sysctl_header;
+	struct ctl_table dn_dev_vars[5];
+} dn_dev_sysctl = {
+	NULL,
+	{
+	{
+		.procname = "forwarding",
+		.data = (void *)DN_DEV_PARMS_OFFSET(forwarding),
+		.maxlen = sizeof(int),
+		.mode = 0644,
+		.proc_handler = dn_forwarding_proc,
+	},
+	{
+		.procname = "priority",
+		.data = (void *)DN_DEV_PARMS_OFFSET(priority),
+		.maxlen = sizeof(int),
+		.mode = 0644,
+		.proc_handler = proc_dointvec_minmax,
+		.extra1 = &min_priority,
+		.extra2 = &max_priority
+	},
+	{
+		.procname = "t2",
+		.data = (void *)DN_DEV_PARMS_OFFSET(t2),
+		.maxlen = sizeof(int),
+		.mode = 0644,
+		.proc_handler = proc_dointvec_minmax,
+		.extra1 = &min_t2,
+		.extra2 = &max_t2
+	},
+	{
+		.procname = "t3",
+		.data = (void *)DN_DEV_PARMS_OFFSET(t3),
+		.maxlen = sizeof(int),
+		.mode = 0644,
+		.proc_handler = proc_dointvec_minmax,
+		.extra1 = &min_t3,
+		.extra2 = &max_t3
+	},
+	{0}
+	},
+};
+
+static void dn_dev_sysctl_register(struct net_device *dev, struct dn_dev_parms *parms)
+{
+	struct dn_dev_sysctl_table *t;
+	int i;
+
+	char path[sizeof("net/decnet/conf/") + IFNAMSIZ];
+
+	t = kmemdup(&dn_dev_sysctl, sizeof(*t), GFP_KERNEL);
+	if (t == NULL)
+		return;
+
+	for(i = 0; i < ARRAY_SIZE(t->dn_dev_vars) - 1; i++) {
+		long offset = (long)t->dn_dev_vars[i].data;
+		t->dn_dev_vars[i].data = ((char *)parms) + offset;
+	}
+
+	snprintf(path, sizeof(path), "net/decnet/conf/%s",
+		dev? dev->name : parms->name);
+
+	t->dn_dev_vars[0].extra1 = (void *)dev;
+
+	t->sysctl_header = register_net_sysctl(&init_net, path, t->dn_dev_vars);
+	if (t->sysctl_header == NULL)
+		kfree(t);
+	else
+		parms->sysctl = t;
+}
+
+static void dn_dev_sysctl_unregister(struct dn_dev_parms *parms)
+{
+	if (parms->sysctl) {
+		struct dn_dev_sysctl_table *t = parms->sysctl;
+		parms->sysctl = NULL;
+		unregister_net_sysctl_table(t->sysctl_header);
+		kfree(t);
+	}
+}
+
+static int dn_forwarding_proc(struct ctl_table *table, int write,
+				void __user *buffer,
+				size_t *lenp, loff_t *ppos)
+{
+#ifdef CONFIG_DECNET_ROUTER
+	struct net_device *dev = table->extra1;
+	struct dn_dev *dn_db;
+	int err;
+	int tmp, old;
+
+	if (table->extra1 == NULL)
+		return -EINVAL;
+
+	dn_db = rcu_dereference_raw(dev->dn_ptr);
+	old = dn_db->parms.forwarding;
+
+	err = proc_dointvec(table, write, buffer, lenp, ppos);
+
+	if ((err >= 0) && write) {
+		if (dn_db->parms.forwarding < 0)
+			dn_db->parms.forwarding = 0;
+		if (dn_db->parms.forwarding > 2)
+			dn_db->parms.forwarding = 2;
+		/*
+		 * What an ugly hack this is... its works, just. It
+		 * would be nice if sysctl/proc were just that little
+		 * bit more flexible so I don't have to write a special
+		 * routine, or suffer hacks like this - SJW
+		 */
+		tmp = dn_db->parms.forwarding;
+		dn_db->parms.forwarding = old;
+		if (dn_db->parms.down)
+			dn_db->parms.down(dev);
+		dn_db->parms.forwarding = tmp;
+		if (dn_db->parms.up)
+			dn_db->parms.up(dev);
+	}
+
+	return err;
+#else
+	return -EINVAL;
+#endif
+}
+
+#else /* CONFIG_SYSCTL */
+static void dn_dev_sysctl_unregister(struct dn_dev_parms *parms)
+{
+}
+static void dn_dev_sysctl_register(struct net_device *dev, struct dn_dev_parms *parms)
+{
+}
+
+#endif /* CONFIG_SYSCTL */
+
+static inline __u16 mtu2blksize(struct net_device *dev)
+{
+	u32 blksize = dev->mtu;
+	if (blksize > 0xffff)
+		blksize = 0xffff;
+
+	if (dev->type == ARPHRD_ETHER ||
+	    dev->type == ARPHRD_PPP ||
+	    dev->type == ARPHRD_IPGRE ||
+	    dev->type == ARPHRD_LOOPBACK)
+		blksize -= 2;
+
+	return (__u16)blksize;
+}
+
+static struct dn_ifaddr *dn_dev_alloc_ifa(void)
+{
+	struct dn_ifaddr *ifa;
+
+	ifa = kzalloc(sizeof(*ifa), GFP_KERNEL);
+
+	return ifa;
+}
+
+static void dn_dev_free_ifa(struct dn_ifaddr *ifa)
+{
+	kfree_rcu(ifa, rcu);
+}
+
+static void dn_dev_del_ifa(struct dn_dev *dn_db, struct dn_ifaddr __rcu **ifap, int destroy)
+{
+	struct dn_ifaddr *ifa1 = rtnl_dereference(*ifap);
+	unsigned char mac_addr[6];
+	struct net_device *dev = dn_db->dev;
+
+	ASSERT_RTNL();
+
+	*ifap = ifa1->ifa_next;
+
+	if (dn_db->dev->type == ARPHRD_ETHER) {
+		if (ifa1->ifa_local != dn_eth2dn(dev->dev_addr)) {
+			dn_dn2eth(mac_addr, ifa1->ifa_local);
+			dev_mc_del(dev, mac_addr);
+		}
+	}
+
+	dn_ifaddr_notify(RTM_DELADDR, ifa1);
+	blocking_notifier_call_chain(&dnaddr_chain, NETDEV_DOWN, ifa1);
+	if (destroy) {
+		dn_dev_free_ifa(ifa1);
+
+		if (dn_db->ifa_list == NULL)
+			dn_dev_delete(dn_db->dev);
+	}
+}
+
+static int dn_dev_insert_ifa(struct dn_dev *dn_db, struct dn_ifaddr *ifa)
+{
+	struct net_device *dev = dn_db->dev;
+	struct dn_ifaddr *ifa1;
+	unsigned char mac_addr[6];
+
+	ASSERT_RTNL();
+
+	/* Check for duplicates */
+	for (ifa1 = rtnl_dereference(dn_db->ifa_list);
+	     ifa1 != NULL;
+	     ifa1 = rtnl_dereference(ifa1->ifa_next)) {
+		if (ifa1->ifa_local == ifa->ifa_local)
+			return -EEXIST;
+	}
+
+	if (dev->type == ARPHRD_ETHER) {
+		if (ifa->ifa_local != dn_eth2dn(dev->dev_addr)) {
+			dn_dn2eth(mac_addr, ifa->ifa_local);
+			dev_mc_add(dev, mac_addr);
+		}
+	}
+
+	ifa->ifa_next = dn_db->ifa_list;
+	rcu_assign_pointer(dn_db->ifa_list, ifa);
+
+	dn_ifaddr_notify(RTM_NEWADDR, ifa);
+	blocking_notifier_call_chain(&dnaddr_chain, NETDEV_UP, ifa);
+
+	return 0;
+}
+
+static int dn_dev_set_ifa(struct net_device *dev, struct dn_ifaddr *ifa)
+{
+	struct dn_dev *dn_db = rtnl_dereference(dev->dn_ptr);
+	int rv;
+
+	if (dn_db == NULL) {
+		int err;
+		dn_db = dn_dev_create(dev, &err);
+		if (dn_db == NULL)
+			return err;
+	}
+
+	ifa->ifa_dev = dn_db;
+
+	if (dev->flags & IFF_LOOPBACK)
+		ifa->ifa_scope = RT_SCOPE_HOST;
+
+	rv = dn_dev_insert_ifa(dn_db, ifa);
+	if (rv)
+		dn_dev_free_ifa(ifa);
+	return rv;
+}
+
+
+int dn_dev_ioctl(unsigned int cmd, void __user *arg)
+{
+	char buffer[DN_IFREQ_SIZE];
+	struct ifreq *ifr = (struct ifreq *)buffer;
+	struct sockaddr_dn *sdn = (struct sockaddr_dn *)&ifr->ifr_addr;
+	struct dn_dev *dn_db;
+	struct net_device *dev;
+	struct dn_ifaddr *ifa = NULL;
+	struct dn_ifaddr __rcu **ifap = NULL;
+	int ret = 0;
+
+	if (copy_from_user(ifr, arg, DN_IFREQ_SIZE))
+		return -EFAULT;
+	ifr->ifr_name[IFNAMSIZ-1] = 0;
+
+	dev_load(&init_net, ifr->ifr_name);
+
+	switch (cmd) {
+	case SIOCGIFADDR:
+		break;
+	case SIOCSIFADDR:
+		if (!capable(CAP_NET_ADMIN))
+			return -EACCES;
+		if (sdn->sdn_family != AF_DECnet)
+			return -EINVAL;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	rtnl_lock();
+
+	if ((dev = __dev_get_by_name(&init_net, ifr->ifr_name)) == NULL) {
+		ret = -ENODEV;
+		goto done;
+	}
+
+	if ((dn_db = rtnl_dereference(dev->dn_ptr)) != NULL) {
+		for (ifap = &dn_db->ifa_list;
+		     (ifa = rtnl_dereference(*ifap)) != NULL;
+		     ifap = &ifa->ifa_next)
+			if (strcmp(ifr->ifr_name, ifa->ifa_label) == 0)
+				break;
+	}
+
+	if (ifa == NULL && cmd != SIOCSIFADDR) {
+		ret = -EADDRNOTAVAIL;
+		goto done;
+	}
+
+	switch (cmd) {
+	case SIOCGIFADDR:
+		*((__le16 *)sdn->sdn_nodeaddr) = ifa->ifa_local;
+		goto rarok;
+
+	case SIOCSIFADDR:
+		if (!ifa) {
+			if ((ifa = dn_dev_alloc_ifa()) == NULL) {
+				ret = -ENOBUFS;
+				break;
+			}
+			memcpy(ifa->ifa_label, dev->name, IFNAMSIZ);
+		} else {
+			if (ifa->ifa_local == dn_saddr2dn(sdn))
+				break;
+			dn_dev_del_ifa(dn_db, ifap, 0);
+		}
+
+		ifa->ifa_local = ifa->ifa_address = dn_saddr2dn(sdn);
+
+		ret = dn_dev_set_ifa(dev, ifa);
+	}
+done:
+	rtnl_unlock();
+
+	return ret;
+rarok:
+	if (copy_to_user(arg, ifr, DN_IFREQ_SIZE))
+		ret = -EFAULT;
+	goto done;
+}
+
+struct net_device *dn_dev_get_default(void)
+{
+	struct net_device *dev;
+
+	spin_lock(&dndev_lock);
+	dev = decnet_default_device;
+	if (dev) {
+		if (dev->dn_ptr)
+			dev_hold(dev);
+		else
+			dev = NULL;
+	}
+	spin_unlock(&dndev_lock);
+
+	return dev;
+}
+
+int dn_dev_set_default(struct net_device *dev, int force)
+{
+	struct net_device *old = NULL;
+	int rv = -EBUSY;
+	if (!dev->dn_ptr)
+		return -ENODEV;
+
+	spin_lock(&dndev_lock);
+	if (force || decnet_default_device == NULL) {
+		old = decnet_default_device;
+		decnet_default_device = dev;
+		rv = 0;
+	}
+	spin_unlock(&dndev_lock);
+
+	if (old)
+		dev_put(old);
+	return rv;
+}
+
+static void dn_dev_check_default(struct net_device *dev)
+{
+	spin_lock(&dndev_lock);
+	if (dev == decnet_default_device) {
+		decnet_default_device = NULL;
+	} else {
+		dev = NULL;
+	}
+	spin_unlock(&dndev_lock);
+
+	if (dev)
+		dev_put(dev);
+}
+
+/*
+ * Called with RTNL
+ */
+static struct dn_dev *dn_dev_by_index(int ifindex)
+{
+	struct net_device *dev;
+	struct dn_dev *dn_dev = NULL;
+
+	dev = __dev_get_by_index(&init_net, ifindex);
+	if (dev)
+		dn_dev = rtnl_dereference(dev->dn_ptr);
+
+	return dn_dev;
+}
+
+static const struct nla_policy dn_ifa_policy[IFA_MAX+1] = {
+	[IFA_ADDRESS]		= { .type = NLA_U16 },
+	[IFA_LOCAL]		= { .type = NLA_U16 },
+	[IFA_LABEL]		= { .type = NLA_STRING,
+				    .len = IFNAMSIZ - 1 },
+	[IFA_FLAGS]		= { .type = NLA_U32 },
+};
+
+static int dn_nl_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh)
+{
+	struct net *net = sock_net(skb->sk);
+	struct nlattr *tb[IFA_MAX+1];
+	struct dn_dev *dn_db;
+	struct ifaddrmsg *ifm;
+	struct dn_ifaddr *ifa;
+	struct dn_ifaddr __rcu **ifap;
+	int err = -EINVAL;
+
+	if (!netlink_capable(skb, CAP_NET_ADMIN))
+		return -EPERM;
+
+	if (!net_eq(net, &init_net))
+		goto errout;
+
+	err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, dn_ifa_policy);
+	if (err < 0)
+		goto errout;
+
+	err = -ENODEV;
+	ifm = nlmsg_data(nlh);
+	if ((dn_db = dn_dev_by_index(ifm->ifa_index)) == NULL)
+		goto errout;
+
+	err = -EADDRNOTAVAIL;
+	for (ifap = &dn_db->ifa_list;
+	     (ifa = rtnl_dereference(*ifap)) != NULL;
+	     ifap = &ifa->ifa_next) {
+		if (tb[IFA_LOCAL] &&
+		    nla_memcmp(tb[IFA_LOCAL], &ifa->ifa_local, 2))
+			continue;
+
+		if (tb[IFA_LABEL] && nla_strcmp(tb[IFA_LABEL], ifa->ifa_label))
+			continue;
+
+		dn_dev_del_ifa(dn_db, ifap, 1);
+		return 0;
+	}
+
+errout:
+	return err;
+}
+
+static int dn_nl_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh)
+{
+	struct net *net = sock_net(skb->sk);
+	struct nlattr *tb[IFA_MAX+1];
+	struct net_device *dev;
+	struct dn_dev *dn_db;
+	struct ifaddrmsg *ifm;
+	struct dn_ifaddr *ifa;
+	int err;
+
+	if (!netlink_capable(skb, CAP_NET_ADMIN))
+		return -EPERM;
+
+	if (!net_eq(net, &init_net))
+		return -EINVAL;
+
+	err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, dn_ifa_policy);
+	if (err < 0)
+		return err;
+
+	if (tb[IFA_LOCAL] == NULL)
+		return -EINVAL;
+
+	ifm = nlmsg_data(nlh);
+	if ((dev = __dev_get_by_index(&init_net, ifm->ifa_index)) == NULL)
+		return -ENODEV;
+
+	if ((dn_db = rtnl_dereference(dev->dn_ptr)) == NULL) {
+		dn_db = dn_dev_create(dev, &err);
+		if (!dn_db)
+			return err;
+	}
+
+	if ((ifa = dn_dev_alloc_ifa()) == NULL)
+		return -ENOBUFS;
+
+	if (tb[IFA_ADDRESS] == NULL)
+		tb[IFA_ADDRESS] = tb[IFA_LOCAL];
+
+	ifa->ifa_local = nla_get_le16(tb[IFA_LOCAL]);
+	ifa->ifa_address = nla_get_le16(tb[IFA_ADDRESS]);
+	ifa->ifa_flags = tb[IFA_FLAGS] ? nla_get_u32(tb[IFA_FLAGS]) :
+					 ifm->ifa_flags;
+	ifa->ifa_scope = ifm->ifa_scope;
+	ifa->ifa_dev = dn_db;
+
+	if (tb[IFA_LABEL])
+		nla_strlcpy(ifa->ifa_label, tb[IFA_LABEL], IFNAMSIZ);
+	else
+		memcpy(ifa->ifa_label, dev->name, IFNAMSIZ);
+
+	err = dn_dev_insert_ifa(dn_db, ifa);
+	if (err)
+		dn_dev_free_ifa(ifa);
+
+	return err;
+}
+
+static inline size_t dn_ifaddr_nlmsg_size(void)
+{
+	return NLMSG_ALIGN(sizeof(struct ifaddrmsg))
+	       + nla_total_size(IFNAMSIZ) /* IFA_LABEL */
+	       + nla_total_size(2) /* IFA_ADDRESS */
+	       + nla_total_size(2) /* IFA_LOCAL */
+	       + nla_total_size(4); /* IFA_FLAGS */
+}
+
+static int dn_nl_fill_ifaddr(struct sk_buff *skb, struct dn_ifaddr *ifa,
+			     u32 portid, u32 seq, int event, unsigned int flags)
+{
+	struct ifaddrmsg *ifm;
+	struct nlmsghdr *nlh;
+	u32 ifa_flags = ifa->ifa_flags | IFA_F_PERMANENT;
+
+	nlh = nlmsg_put(skb, portid, seq, event, sizeof(*ifm), flags);
+	if (nlh == NULL)
+		return -EMSGSIZE;
+
+	ifm = nlmsg_data(nlh);
+	ifm->ifa_family = AF_DECnet;
+	ifm->ifa_prefixlen = 16;
+	ifm->ifa_flags = ifa_flags;
+	ifm->ifa_scope = ifa->ifa_scope;
+	ifm->ifa_index = ifa->ifa_dev->dev->ifindex;
+
+	if ((ifa->ifa_address &&
+	     nla_put_le16(skb, IFA_ADDRESS, ifa->ifa_address)) ||
+	    (ifa->ifa_local &&
+	     nla_put_le16(skb, IFA_LOCAL, ifa->ifa_local)) ||
+	    (ifa->ifa_label[0] &&
+	     nla_put_string(skb, IFA_LABEL, ifa->ifa_label)) ||
+	     nla_put_u32(skb, IFA_FLAGS, ifa_flags))
+		goto nla_put_failure;
+	nlmsg_end(skb, nlh);
+	return 0;
+
+nla_put_failure:
+	nlmsg_cancel(skb, nlh);
+	return -EMSGSIZE;
+}
+
+static void dn_ifaddr_notify(int event, struct dn_ifaddr *ifa)
+{
+	struct sk_buff *skb;
+	int err = -ENOBUFS;
+
+	skb = alloc_skb(dn_ifaddr_nlmsg_size(), GFP_KERNEL);
+	if (skb == NULL)
+		goto errout;
+
+	err = dn_nl_fill_ifaddr(skb, ifa, 0, 0, event, 0);
+	if (err < 0) {
+		/* -EMSGSIZE implies BUG in dn_ifaddr_nlmsg_size() */
+		WARN_ON(err == -EMSGSIZE);
+		kfree_skb(skb);
+		goto errout;
+	}
+	rtnl_notify(skb, &init_net, 0, RTNLGRP_DECnet_IFADDR, NULL, GFP_KERNEL);
+	return;
+errout:
+	if (err < 0)
+		rtnl_set_sk_err(&init_net, RTNLGRP_DECnet_IFADDR, err);
+}
+
+static int dn_nl_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb)
+{
+	struct net *net = sock_net(skb->sk);
+	int idx, dn_idx = 0, skip_ndevs, skip_naddr;
+	struct net_device *dev;
+	struct dn_dev *dn_db;
+	struct dn_ifaddr *ifa;
+
+	if (!net_eq(net, &init_net))
+		return 0;
+
+	skip_ndevs = cb->args[0];
+	skip_naddr = cb->args[1];
+
+	idx = 0;
+	rcu_read_lock();
+	for_each_netdev_rcu(&init_net, dev) {
+		if (idx < skip_ndevs)
+			goto cont;
+		else if (idx > skip_ndevs) {
+			/* Only skip over addresses for first dev dumped
+			 * in this iteration (idx == skip_ndevs) */
+			skip_naddr = 0;
+		}
+
+		if ((dn_db = rcu_dereference(dev->dn_ptr)) == NULL)
+			goto cont;
+
+		for (ifa = rcu_dereference(dn_db->ifa_list), dn_idx = 0; ifa;
+		     ifa = rcu_dereference(ifa->ifa_next), dn_idx++) {
+			if (dn_idx < skip_naddr)
+				continue;
+
+			if (dn_nl_fill_ifaddr(skb, ifa, NETLINK_CB(cb->skb).portid,
+					      cb->nlh->nlmsg_seq, RTM_NEWADDR,
+					      NLM_F_MULTI) < 0)
+				goto done;
+		}
+cont:
+		idx++;
+	}
+done:
+	rcu_read_unlock();
+	cb->args[0] = idx;
+	cb->args[1] = dn_idx;
+
+	return skb->len;
+}
+
+static int dn_dev_get_first(struct net_device *dev, __le16 *addr)
+{
+	struct dn_dev *dn_db;
+	struct dn_ifaddr *ifa;
+	int rv = -ENODEV;
+
+	rcu_read_lock();
+	dn_db = rcu_dereference(dev->dn_ptr);
+	if (dn_db == NULL)
+		goto out;
+
+	ifa = rcu_dereference(dn_db->ifa_list);
+	if (ifa != NULL) {
+		*addr = ifa->ifa_local;
+		rv = 0;
+	}
+out:
+	rcu_read_unlock();
+	return rv;
+}
+
+/*
+ * Find a default address to bind to.
+ *
+ * This is one of those areas where the initial VMS concepts don't really
+ * map onto the Linux concepts, and since we introduced multiple addresses
+ * per interface we have to cope with slightly odd ways of finding out what
+ * "our address" really is. Mostly it's not a problem; for this we just guess
+ * a sensible default. Eventually the routing code will take care of all the
+ * nasties for us I hope.
+ */
+int dn_dev_bind_default(__le16 *addr)
+{
+	struct net_device *dev;
+	int rv;
+	dev = dn_dev_get_default();
+last_chance:
+	if (dev) {
+		rv = dn_dev_get_first(dev, addr);
+		dev_put(dev);
+		if (rv == 0 || dev == init_net.loopback_dev)
+			return rv;
+	}
+	dev = init_net.loopback_dev;
+	dev_hold(dev);
+	goto last_chance;
+}
+
+static void dn_send_endnode_hello(struct net_device *dev, struct dn_ifaddr *ifa)
+{
+	struct endnode_hello_message *msg;
+	struct sk_buff *skb = NULL;
+	__le16 *pktlen;
+	struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr);
+
+	if ((skb = dn_alloc_skb(NULL, sizeof(*msg), GFP_ATOMIC)) == NULL)
+		return;
+
+	skb->dev = dev;
+
+	msg = (struct endnode_hello_message *)skb_put(skb,sizeof(*msg));
+
+	msg->msgflg  = 0x0D;
+	memcpy(msg->tiver, dn_eco_version, 3);
+	dn_dn2eth(msg->id, ifa->ifa_local);
+	msg->iinfo   = DN_RT_INFO_ENDN;
+	msg->blksize = cpu_to_le16(mtu2blksize(dev));
+	msg->area    = 0x00;
+	memset(msg->seed, 0, 8);
+	memcpy(msg->neighbor, dn_hiord, ETH_ALEN);
+
+	if (dn_db->router) {
+		struct dn_neigh *dn = (struct dn_neigh *)dn_db->router;
+		dn_dn2eth(msg->neighbor, dn->addr);
+	}
+
+	msg->timer   = cpu_to_le16((unsigned short)dn_db->parms.t3);
+	msg->mpd     = 0x00;
+	msg->datalen = 0x02;
+	memset(msg->data, 0xAA, 2);
+
+	pktlen = (__le16 *)skb_push(skb,2);
+	*pktlen = cpu_to_le16(skb->len - 2);
+
+	skb_reset_network_header(skb);
+
+	dn_rt_finish_output(skb, dn_rt_all_rt_mcast, msg->id);
+}
+
+
+#define DRDELAY (5 * HZ)
+
+static int dn_am_i_a_router(struct dn_neigh *dn, struct dn_dev *dn_db, struct dn_ifaddr *ifa)
+{
+	/* First check time since device went up */
+	if (time_before(jiffies, dn_db->uptime + DRDELAY))
+		return 0;
+
+	/* If there is no router, then yes... */
+	if (!dn_db->router)
+		return 1;
+
+	/* otherwise only if we have a higher priority or.. */
+	if (dn->priority < dn_db->parms.priority)
+		return 1;
+
+	/* if we have equal priority and a higher node number */
+	if (dn->priority != dn_db->parms.priority)
+		return 0;
+
+	if (le16_to_cpu(dn->addr) < le16_to_cpu(ifa->ifa_local))
+		return 1;
+
+	return 0;
+}
+
+static void dn_send_router_hello(struct net_device *dev, struct dn_ifaddr *ifa)
+{
+	int n;
+	struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr);
+	struct dn_neigh *dn = (struct dn_neigh *)dn_db->router;
+	struct sk_buff *skb;
+	size_t size;
+	unsigned char *ptr;
+	unsigned char *i1, *i2;
+	__le16 *pktlen;
+	char *src;
+
+	if (mtu2blksize(dev) < (26 + 7))
+		return;
+
+	n = mtu2blksize(dev) - 26;
+	n /= 7;
+
+	if (n > 32)
+		n = 32;
+
+	size = 2 + 26 + 7 * n;
+
+	if ((skb = dn_alloc_skb(NULL, size, GFP_ATOMIC)) == NULL)
+		return;
+
+	skb->dev = dev;
+	ptr = skb_put(skb, size);
+
+	*ptr++ = DN_RT_PKT_CNTL | DN_RT_PKT_ERTH;
+	*ptr++ = 2; /* ECO */
+	*ptr++ = 0;
+	*ptr++ = 0;
+	dn_dn2eth(ptr, ifa->ifa_local);
+	src = ptr;
+	ptr += ETH_ALEN;
+	*ptr++ = dn_db->parms.forwarding == 1 ?
+			DN_RT_INFO_L1RT : DN_RT_INFO_L2RT;
+	*((__le16 *)ptr) = cpu_to_le16(mtu2blksize(dev));
+	ptr += 2;
+	*ptr++ = dn_db->parms.priority; /* Priority */
+	*ptr++ = 0; /* Area: Reserved */
+	*((__le16 *)ptr) = cpu_to_le16((unsigned short)dn_db->parms.t3);
+	ptr += 2;
+	*ptr++ = 0; /* MPD: Reserved */
+	i1 = ptr++;
+	memset(ptr, 0, 7); /* Name: Reserved */
+	ptr += 7;
+	i2 = ptr++;
+
+	n = dn_neigh_elist(dev, ptr, n);
+
+	*i2 = 7 * n;
+	*i1 = 8 + *i2;
+
+	skb_trim(skb, (27 + *i2));
+
+	pktlen = (__le16 *)skb_push(skb, 2);
+	*pktlen = cpu_to_le16(skb->len - 2);
+
+	skb_reset_network_header(skb);
+
+	if (dn_am_i_a_router(dn, dn_db, ifa)) {
+		struct sk_buff *skb2 = skb_copy(skb, GFP_ATOMIC);
+		if (skb2) {
+			dn_rt_finish_output(skb2, dn_rt_all_end_mcast, src);
+		}
+	}
+
+	dn_rt_finish_output(skb, dn_rt_all_rt_mcast, src);
+}
+
+static void dn_send_brd_hello(struct net_device *dev, struct dn_ifaddr *ifa)
+{
+	struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr);
+
+	if (dn_db->parms.forwarding == 0)
+		dn_send_endnode_hello(dev, ifa);
+	else
+		dn_send_router_hello(dev, ifa);
+}
+
+static void dn_send_ptp_hello(struct net_device *dev, struct dn_ifaddr *ifa)
+{
+	int tdlen = 16;
+	int size = dev->hard_header_len + 2 + 4 + tdlen;
+	struct sk_buff *skb = dn_alloc_skb(NULL, size, GFP_ATOMIC);
+	int i;
+	unsigned char *ptr;
+	char src[ETH_ALEN];
+
+	if (skb == NULL)
+		return ;
+
+	skb->dev = dev;
+	skb_push(skb, dev->hard_header_len);
+	ptr = skb_put(skb, 2 + 4 + tdlen);
+
+	*ptr++ = DN_RT_PKT_HELO;
+	*((__le16 *)ptr) = ifa->ifa_local;
+	ptr += 2;
+	*ptr++ = tdlen;
+
+	for(i = 0; i < tdlen; i++)
+		*ptr++ = 0252;
+
+	dn_dn2eth(src, ifa->ifa_local);
+	dn_rt_finish_output(skb, dn_rt_all_rt_mcast, src);
+}
+
+static int dn_eth_up(struct net_device *dev)
+{
+	struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr);
+
+	if (dn_db->parms.forwarding == 0)
+		dev_mc_add(dev, dn_rt_all_end_mcast);
+	else
+		dev_mc_add(dev, dn_rt_all_rt_mcast);
+
+	dn_db->use_long = 1;
+
+	return 0;
+}
+
+static void dn_eth_down(struct net_device *dev)
+{
+	struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr);
+
+	if (dn_db->parms.forwarding == 0)
+		dev_mc_del(dev, dn_rt_all_end_mcast);
+	else
+		dev_mc_del(dev, dn_rt_all_rt_mcast);
+}
+
+static void dn_dev_set_timer(struct net_device *dev);
+
+static void dn_dev_timer_func(unsigned long arg)
+{
+	struct net_device *dev = (struct net_device *)arg;
+	struct dn_dev *dn_db;
+	struct dn_ifaddr *ifa;
+
+	rcu_read_lock();
+	dn_db = rcu_dereference(dev->dn_ptr);
+	if (dn_db->t3 <= dn_db->parms.t2) {
+		if (dn_db->parms.timer3) {
+			for (ifa = rcu_dereference(dn_db->ifa_list);
+			     ifa;
+			     ifa = rcu_dereference(ifa->ifa_next)) {
+				if (!(ifa->ifa_flags & IFA_F_SECONDARY))
+					dn_db->parms.timer3(dev, ifa);
+			}
+		}
+		dn_db->t3 = dn_db->parms.t3;
+	} else {
+		dn_db->t3 -= dn_db->parms.t2;
+	}
+	rcu_read_unlock();
+	dn_dev_set_timer(dev);
+}
+
+static void dn_dev_set_timer(struct net_device *dev)
+{
+	struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr);
+
+	if (dn_db->parms.t2 > dn_db->parms.t3)
+		dn_db->parms.t2 = dn_db->parms.t3;
+
+	dn_db->timer.data = (unsigned long)dev;
+	dn_db->timer.function = dn_dev_timer_func;
+	dn_db->timer.expires = jiffies + (dn_db->parms.t2 * HZ);
+
+	add_timer(&dn_db->timer);
+}
+
+static struct dn_dev *dn_dev_create(struct net_device *dev, int *err)
+{
+	int i;
+	struct dn_dev_parms *p = dn_dev_list;
+	struct dn_dev *dn_db;
+
+	for(i = 0; i < DN_DEV_LIST_SIZE; i++, p++) {
+		if (p->type == dev->type)
+			break;
+	}
+
+	*err = -ENODEV;
+	if (i == DN_DEV_LIST_SIZE)
+		return NULL;
+
+	*err = -ENOBUFS;
+	if ((dn_db = kzalloc(sizeof(struct dn_dev), GFP_ATOMIC)) == NULL)
+		return NULL;
+
+	memcpy(&dn_db->parms, p, sizeof(struct dn_dev_parms));
+
+	rcu_assign_pointer(dev->dn_ptr, dn_db);
+	dn_db->dev = dev;
+	init_timer(&dn_db->timer);
+
+	dn_db->uptime = jiffies;
+
+	dn_db->neigh_parms = neigh_parms_alloc(dev, &dn_neigh_table);
+	if (!dn_db->neigh_parms) {
+		RCU_INIT_POINTER(dev->dn_ptr, NULL);
+		kfree(dn_db);
+		return NULL;
+	}
+
+	if (dn_db->parms.up) {
+		if (dn_db->parms.up(dev) < 0) {
+			neigh_parms_release(&dn_neigh_table, dn_db->neigh_parms);
+			dev->dn_ptr = NULL;
+			kfree(dn_db);
+			return NULL;
+		}
+	}
+
+	dn_dev_sysctl_register(dev, &dn_db->parms);
+
+	dn_dev_set_timer(dev);
+
+	*err = 0;
+	return dn_db;
+}
+
+
+/*
+ * This processes a device up event. We only start up
+ * the loopback device & ethernet devices with correct
+ * MAC addresses automatically. Others must be started
+ * specifically.
+ *
+ * FIXME: How should we configure the loopback address ? If we could dispense
+ * with using decnet_address here and for autobind, it will be one less thing
+ * for users to worry about setting up.
+ */
+
+void dn_dev_up(struct net_device *dev)
+{
+	struct dn_ifaddr *ifa;
+	__le16 addr = decnet_address;
+	int maybe_default = 0;
+	struct dn_dev *dn_db = rtnl_dereference(dev->dn_ptr);
+
+	if ((dev->type != ARPHRD_ETHER) && (dev->type != ARPHRD_LOOPBACK))
+		return;
+
+	/*
+	 * Need to ensure that loopback device has a dn_db attached to it
+	 * to allow creation of neighbours against it, even though it might
+	 * not have a local address of its own. Might as well do the same for
+	 * all autoconfigured interfaces.
+	 */
+	if (dn_db == NULL) {
+		int err;
+		dn_db = dn_dev_create(dev, &err);
+		if (dn_db == NULL)
+			return;
+	}
+
+	if (dev->type == ARPHRD_ETHER) {
+		if (memcmp(dev->dev_addr, dn_hiord, 4) != 0)
+			return;
+		addr = dn_eth2dn(dev->dev_addr);
+		maybe_default = 1;
+	}
+
+	if (addr == 0)
+		return;
+
+	if ((ifa = dn_dev_alloc_ifa()) == NULL)
+		return;
+
+	ifa->ifa_local = ifa->ifa_address = addr;
+	ifa->ifa_flags = 0;
+	ifa->ifa_scope = RT_SCOPE_UNIVERSE;
+	strcpy(ifa->ifa_label, dev->name);
+
+	dn_dev_set_ifa(dev, ifa);
+
+	/*
+	 * Automagically set the default device to the first automatically
+	 * configured ethernet card in the system.
+	 */
+	if (maybe_default) {
+		dev_hold(dev);
+		if (dn_dev_set_default(dev, 0))
+			dev_put(dev);
+	}
+}
+
+static void dn_dev_delete(struct net_device *dev)
+{
+	struct dn_dev *dn_db = rtnl_dereference(dev->dn_ptr);
+
+	if (dn_db == NULL)
+		return;
+
+	del_timer_sync(&dn_db->timer);
+	dn_dev_sysctl_unregister(&dn_db->parms);
+	dn_dev_check_default(dev);
+	neigh_ifdown(&dn_neigh_table, dev);
+
+	if (dn_db->parms.down)
+		dn_db->parms.down(dev);
+
+	dev->dn_ptr = NULL;
+
+	neigh_parms_release(&dn_neigh_table, dn_db->neigh_parms);
+	neigh_ifdown(&dn_neigh_table, dev);
+
+	if (dn_db->router)
+		neigh_release(dn_db->router);
+	if (dn_db->peer)
+		neigh_release(dn_db->peer);
+
+	kfree(dn_db);
+}
+
+void dn_dev_down(struct net_device *dev)
+{
+	struct dn_dev *dn_db = rtnl_dereference(dev->dn_ptr);
+	struct dn_ifaddr *ifa;
+
+	if (dn_db == NULL)
+		return;
+
+	while ((ifa = rtnl_dereference(dn_db->ifa_list)) != NULL) {
+		dn_dev_del_ifa(dn_db, &dn_db->ifa_list, 0);
+		dn_dev_free_ifa(ifa);
+	}
+
+	dn_dev_delete(dev);
+}
+
+void dn_dev_init_pkt(struct sk_buff *skb)
+{
+}
+
+void dn_dev_veri_pkt(struct sk_buff *skb)
+{
+}
+
+void dn_dev_hello(struct sk_buff *skb)
+{
+}
+
+void dn_dev_devices_off(void)
+{
+	struct net_device *dev;
+
+	rtnl_lock();
+	for_each_netdev(&init_net, dev)
+		dn_dev_down(dev);
+	rtnl_unlock();
+
+}
+
+void dn_dev_devices_on(void)
+{
+	struct net_device *dev;
+
+	rtnl_lock();
+	for_each_netdev(&init_net, dev) {
+		if (dev->flags & IFF_UP)
+			dn_dev_up(dev);
+	}
+	rtnl_unlock();
+}
+
+int register_dnaddr_notifier(struct notifier_block *nb)
+{
+	return blocking_notifier_chain_register(&dnaddr_chain, nb);
+}
+
+int unregister_dnaddr_notifier(struct notifier_block *nb)
+{
+	return blocking_notifier_chain_unregister(&dnaddr_chain, nb);
+}
+
+#ifdef CONFIG_PROC_FS
+static inline int is_dn_dev(struct net_device *dev)
+{
+	return dev->dn_ptr != NULL;
+}
+
+static void *dn_dev_seq_start(struct seq_file *seq, loff_t *pos)
+	__acquires(RCU)
+{
+	int i;
+	struct net_device *dev;
+
+	rcu_read_lock();
+
+	if (*pos == 0)
+		return SEQ_START_TOKEN;
+
+	i = 1;
+	for_each_netdev_rcu(&init_net, dev) {
+		if (!is_dn_dev(dev))
+			continue;
+
+		if (i++ == *pos)
+			return dev;
+	}
+
+	return NULL;
+}
+
+static void *dn_dev_seq_next(struct seq_file *seq, void *v, loff_t *pos)
+{
+	struct net_device *dev;
+
+	++*pos;
+
+	dev = v;
+	if (v == SEQ_START_TOKEN)
+		dev = net_device_entry(&init_net.dev_base_head);
+
+	for_each_netdev_continue_rcu(&init_net, dev) {
+		if (!is_dn_dev(dev))
+			continue;
+
+		return dev;
+	}
+
+	return NULL;
+}
+
+static void dn_dev_seq_stop(struct seq_file *seq, void *v)
+	__releases(RCU)
+{
+	rcu_read_unlock();
+}
+
+static char *dn_type2asc(char type)
+{
+	switch (type) {
+	case DN_DEV_BCAST:
+		return "B";
+	case DN_DEV_UCAST:
+		return "U";
+	case DN_DEV_MPOINT:
+		return "M";
+	}
+
+	return "?";
+}
+
+static int dn_dev_seq_show(struct seq_file *seq, void *v)
+{
+	if (v == SEQ_START_TOKEN)
+		seq_puts(seq, "Name     Flags T1   Timer1 T3   Timer3 BlkSize Pri State DevType    Router Peer\n");
+	else {
+		struct net_device *dev = v;
+		char peer_buf[DN_ASCBUF_LEN];
+		char router_buf[DN_ASCBUF_LEN];
+		struct dn_dev *dn_db = rcu_dereference(dev->dn_ptr);
+
+		seq_printf(seq, "%-8s %1s     %04u %04u   %04lu %04lu"
+				"   %04hu    %03d %02x    %-10s %-7s %-7s\n",
+				dev->name ? dev->name : "???",
+				dn_type2asc(dn_db->parms.mode),
+				0, 0,
+				dn_db->t3, dn_db->parms.t3,
+				mtu2blksize(dev),
+				dn_db->parms.priority,
+				dn_db->parms.state, dn_db->parms.name,
+				dn_db->router ? dn_addr2asc(le16_to_cpu(*(__le16 *)dn_db->router->primary_key), router_buf) : "",
+				dn_db->peer ? dn_addr2asc(le16_to_cpu(*(__le16 *)dn_db->peer->primary_key), peer_buf) : "");
+	}
+	return 0;
+}
+
+static const struct seq_operations dn_dev_seq_ops = {
+	.start	= dn_dev_seq_start,
+	.next	= dn_dev_seq_next,
+	.stop	= dn_dev_seq_stop,
+	.show	= dn_dev_seq_show,
+};
+
+static int dn_dev_seq_open(struct inode *inode, struct file *file)
+{
+	return seq_open(file, &dn_dev_seq_ops);
+}
+
+static const struct file_operations dn_dev_seq_fops = {
+	.owner	 = THIS_MODULE,
+	.open	 = dn_dev_seq_open,
+	.read	 = seq_read,
+	.llseek	 = seq_lseek,
+	.release = seq_release,
+};
+
+#endif /* CONFIG_PROC_FS */
+
+static int addr[2];
+module_param_array(addr, int, NULL, 0444);
+MODULE_PARM_DESC(addr, "The DECnet address of this machine: area,node");
+
+void __init dn_dev_init(void)
+{
+	if (addr[0] > 63 || addr[0] < 0) {
+		printk(KERN_ERR "DECnet: Area must be between 0 and 63");
+		return;
+	}
+
+	if (addr[1] > 1023 || addr[1] < 0) {
+		printk(KERN_ERR "DECnet: Node must be between 0 and 1023");
+		return;
+	}
+
+	decnet_address = cpu_to_le16((addr[0] << 10) | addr[1]);
+
+	dn_dev_devices_on();
+
+	rtnl_register(PF_DECnet, RTM_NEWADDR, dn_nl_newaddr, NULL, NULL);
+	rtnl_register(PF_DECnet, RTM_DELADDR, dn_nl_deladdr, NULL, NULL);
+	rtnl_register(PF_DECnet, RTM_GETADDR, NULL, dn_nl_dump_ifaddr, NULL);
+
+	proc_create("decnet_dev", S_IRUGO, init_net.proc_net, &dn_dev_seq_fops);
+
+#ifdef CONFIG_SYSCTL
+	{
+		int i;
+		for(i = 0; i < DN_DEV_LIST_SIZE; i++)
+			dn_dev_sysctl_register(NULL, &dn_dev_list[i]);
+	}
+#endif /* CONFIG_SYSCTL */
+}
+
+void __exit dn_dev_cleanup(void)
+{
+#ifdef CONFIG_SYSCTL
+	{
+		int i;
+		for(i = 0; i < DN_DEV_LIST_SIZE; i++)
+			dn_dev_sysctl_unregister(&dn_dev_list[i]);
+	}
+#endif /* CONFIG_SYSCTL */
+
+	remove_proc_entry("decnet_dev", init_net.proc_net);
+
+	dn_dev_devices_off();
+}