Remove DECnet support from kernel

DECnet is an obsolete network protocol that receives more attention
from kernel janitors than users. It belongs in computer protocol
history museum not in Linux kernel.

It has been "Orphaned" in kernel since 2010. The iproute2 support
for DECnet was dropped in 5.0 release. The documentation link on
Sourceforge says it is abandoned there as well.

Leave the UAPI alone to keep userspace programs compiling.
This means that there is still an empty neighbour table
for AF_DECNET.

The table of /proc/sys/net entries was updated to match
current directories and reformatted to be alphabetical.

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Acked-by: David Ahern <dsahern@kernel.org>
Acked-by: Nikolay Aleksandrov <razor@blackwall.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

23 files changed, 1 insertions, 10683 deletions

diff --git a/net/Kconfig b/net/Kconfig
index 6b78f695caa6..48c33c222199 100644
--- a/net/Kconfig
+++ b/net/Kconfig
@@ -204,7 +204,6 @@ config BRIDGE_NETFILTER
 source "net/netfilter/Kconfig"
 source "net/ipv4/netfilter/Kconfig"
 source "net/ipv6/netfilter/Kconfig"
-source "net/decnet/netfilter/Kconfig"
 source "net/bridge/netfilter/Kconfig"
 
 endif
@@ -221,7 +220,6 @@ source "net/802/Kconfig"
 source "net/bridge/Kconfig"
 source "net/dsa/Kconfig"
 source "net/8021q/Kconfig"
-source "net/decnet/Kconfig"
 source "net/llc/Kconfig"
 source "drivers/net/appletalk/Kconfig"
 source "net/x25/Kconfig"
diff --git a/net/Makefile b/net/Makefile
index fbfeb8a0bb37..6a62e5b27378 100644
--- a/net/Makefile
+++ b/net/Makefile
@@ -38,7 +38,6 @@ obj-$(CONFIG_AF_KCM)		+= kcm/
 obj-$(CONFIG_STREAM_PARSER)	+= strparser/
 obj-$(CONFIG_ATM)		+= atm/
 obj-$(CONFIG_L2TP)		+= l2tp/
-obj-$(CONFIG_DECNET)		+= decnet/
 obj-$(CONFIG_PHONET)		+= phonet/
 ifneq ($(CONFIG_VLAN_8021Q),)
 obj-y				+= 8021q/
diff --git a/net/core/dev.c b/net/core/dev.c
index 716df64fcfa5..6847022b9d66 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -10370,9 +10370,7 @@ void netdev_run_todo(void)
 		BUG_ON(!list_empty(&dev->ptype_specific));
 		WARN_ON(rcu_access_pointer(dev->ip_ptr));
 		WARN_ON(rcu_access_pointer(dev->ip6_ptr));
-#if IS_ENABLED(CONFIG_DECNET)
-		WARN_ON(dev->dn_ptr);
-#endif
+
 		if (dev->priv_destructor)
 			dev->priv_destructor(dev);
 		if (dev->needs_free_netdev)
diff --git a/net/core/neighbour.c b/net/core/neighbour.c
index 5b669eb80270..833d2214f36f 100644
--- a/net/core/neighbour.c
+++ b/net/core/neighbour.c
@@ -1847,9 +1847,6 @@ static struct neigh_table *neigh_find_table(int family)
 	case AF_INET6:
 		tbl = neigh_tables[NEIGH_ND_TABLE];
 		break;
-	case AF_DECnet:
-		tbl = neigh_tables[NEIGH_DN_TABLE];
-		break;
 	}
 
 	return tbl;
diff --git a/net/decnet/Kconfig b/net/decnet/Kconfig
deleted file mode 100644
index 24336bdb1054..000000000000
--- a/net/decnet/Kconfig
+++ /dev/null
@@ -1,43 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0-only
-#
-# DECnet configuration
-#
-config DECNET
-	tristate "DECnet Support"
-	help
-	  The DECnet networking protocol was used in many products made by
-	  Digital (now Compaq).  It provides reliable stream and sequenced
-	  packet communications over which run a variety of services similar
-	  to those which run over TCP/IP.
-
-	  To find some tools to use with the kernel layer support, please
-	  look at Patrick Caulfield's web site:
-	  <http://linux-decnet.sourceforge.net/>.
-
-	  More detailed documentation is available in
-	  <file:Documentation/networking/decnet.rst>.
-
-	  Be sure to say Y to "/proc file system support" and "Sysctl support"
-	  below when using DECnet, since you will need sysctl support to aid
-	  in configuration at run time.
-
-	  The DECnet code is also available as a module ( = code which can be
-	  inserted in and removed from the running kernel whenever you want).
-	  The module is called decnet.
-
-config DECNET_ROUTER
-	bool "DECnet: router support"
-	depends on DECNET
-	select FIB_RULES
-	help
-	  Add support for turning your DECnet Endnode into a level 1 or 2
-	  router.  This is an experimental, but functional option.  If you
-	  do say Y here, then make sure that you also say Y to "Kernel/User
-	  network link driver", "Routing messages" and "Network packet
-	  filtering".  The first two are required to allow configuration via
-	  rtnetlink (you will need Alexey Kuznetsov's iproute2 package
-	  from <ftp://ftp.tux.org/pub/net/ip-routing/>). The "Network packet
-	  filtering" option will be required for the forthcoming routing daemon
-	  to work.
-
-	  See <file:Documentation/networking/decnet.rst> for more information.
diff --git a/net/decnet/Makefile b/net/decnet/Makefile
deleted file mode 100644
index 07b38e441b2d..000000000000
--- a/net/decnet/Makefile
+++ /dev/null
@@ -1,10 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0
-
-obj-$(CONFIG_DECNET) += decnet.o
-
-decnet-y := af_decnet.o dn_nsp_in.o dn_nsp_out.o \
-	    dn_route.o dn_dev.o dn_neigh.o dn_timer.o
-decnet-$(CONFIG_DECNET_ROUTER) += dn_fib.o dn_rules.o dn_table.o
-decnet-y += sysctl_net_decnet.o
-
-obj-$(CONFIG_NETFILTER) += netfilter/
diff --git a/net/decnet/README b/net/decnet/README
deleted file mode 100644
index 60e7ec88c81f..000000000000
--- a/net/decnet/README
+++ /dev/null
@@ -1,8 +0,0 @@
-                       Linux DECnet Project
-                      ======================
-
-The documentation for this kernel subsystem is available in the
-Documentation/networking subdirectory of this distribution and also
-on line at http://www.chygwyn.com/DECnet/
-
-Steve Whitehouse <SteveW@ACM.org>
diff --git a/net/decnet/af_decnet.c b/net/decnet/af_decnet.c
deleted file mode 100644
index 6582dfdfb932..000000000000
--- a/net/decnet/af_decnet.c
+++ /dev/null
@@ -1,2404 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-
-/*
- * 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 Socket Layer Interface
- *
- * Authors:     Eduardo Marcelo Serrat <emserrat@geocities.com>
- *              Patrick Caulfield <patrick@pandh.demon.co.uk>
- *
- * Changes:
- *        Steve Whitehouse: Copied from Eduardo Serrat and Patrick Caulfield's
- *                          version of the code. Original copyright preserved
- *                          below.
- *        Steve Whitehouse: Some bug fixes, cleaning up some code to make it
- *                          compatible with my routing layer.
- *        Steve Whitehouse: Merging changes from Eduardo Serrat and Patrick
- *                          Caulfield.
- *        Steve Whitehouse: Further bug fixes, checking module code still works
- *                          with new routing layer.
- *        Steve Whitehouse: Additional set/get_sockopt() calls.
- *        Steve Whitehouse: Fixed TIOCINQ ioctl to be same as Eduardo's new
- *                          code.
- *        Steve Whitehouse: recvmsg() changed to try and behave in a POSIX like
- *                          way. Didn't manage it entirely, but its better.
- *        Steve Whitehouse: ditto for sendmsg().
- *        Steve Whitehouse: A selection of bug fixes to various things.
- *        Steve Whitehouse: Added TIOCOUTQ ioctl.
- *        Steve Whitehouse: Fixes to username2sockaddr & sockaddr2username.
- *        Steve Whitehouse: Fixes to connect() error returns.
- *       Patrick Caulfield: Fixes to delayed acceptance logic.
- *         David S. Miller: New socket locking
- *        Steve Whitehouse: Socket list hashing/locking
- *         Arnaldo C. Melo: use capable, not suser
- *        Steve Whitehouse: Removed unused code. Fix to use sk->allocation
- *                          when required.
- *       Patrick Caulfield: /proc/net/decnet now has object name/number
- *        Steve Whitehouse: Fixed local port allocation, hashed sk list
- *          Matthew Wilcox: Fixes for dn_ioctl()
- *        Steve Whitehouse: New connect/accept logic to allow timeouts and
- *                          prepare for sendpage etc.
- */
-
-
-/******************************************************************************
-    (c) 1995-1998 E.M. Serrat		emserrat@geocities.com
-
-
-HISTORY:
-
-Version           Kernel     Date       Author/Comments
--------           ------     ----       ---------------
-Version 0.0.1     2.0.30    01-dic-97	Eduardo Marcelo Serrat
-					(emserrat@geocities.com)
-
-					First Development of DECnet Socket La-
-					yer for Linux. Only supports outgoing
-					connections.
-
-Version 0.0.2	  2.1.105   20-jun-98   Patrick J. Caulfield
-					(patrick@pandh.demon.co.uk)
-
-					Port to new kernel development version.
-
-Version 0.0.3     2.1.106   25-jun-98   Eduardo Marcelo Serrat
-					(emserrat@geocities.com)
-					_
-					Added support for incoming connections
-					so we can start developing server apps
-					on Linux.
-					-
-					Module Support
-Version 0.0.4     2.1.109   21-jul-98   Eduardo Marcelo Serrat
-				       (emserrat@geocities.com)
-				       _
-					Added support for X11R6.4. Now we can
-					use DECnet transport for X on Linux!!!
-				       -
-Version 0.0.5    2.1.110   01-aug-98   Eduardo Marcelo Serrat
-				       (emserrat@geocities.com)
-				       Removed bugs on flow control
-				       Removed bugs on incoming accessdata
-				       order
-				       -
-Version 0.0.6    2.1.110   07-aug-98   Eduardo Marcelo Serrat
-				       dn_recvmsg fixes
-
-					Patrick J. Caulfield
-				       dn_bind fixes
-*******************************************************************************/
-
-#include <linux/module.h>
-#include <linux/errno.h>
-#include <linux/types.h>
-#include <linux/slab.h>
-#include <linux/socket.h>
-#include <linux/in.h>
-#include <linux/kernel.h>
-#include <linux/sched/signal.h>
-#include <linux/timer.h>
-#include <linux/string.h>
-#include <linux/sockios.h>
-#include <linux/net.h>
-#include <linux/netdevice.h>
-#include <linux/inet.h>
-#include <linux/route.h>
-#include <linux/netfilter.h>
-#include <linux/seq_file.h>
-#include <net/sock.h>
-#include <net/tcp_states.h>
-#include <net/flow.h>
-#include <asm/ioctls.h>
-#include <linux/capability.h>
-#include <linux/mm.h>
-#include <linux/interrupt.h>
-#include <linux/proc_fs.h>
-#include <linux/stat.h>
-#include <linux/init.h>
-#include <linux/poll.h>
-#include <linux/jiffies.h>
-#include <net/net_namespace.h>
-#include <net/neighbour.h>
-#include <net/dst.h>
-#include <net/fib_rules.h>
-#include <net/tcp.h>
-#include <net/dn.h>
-#include <net/dn_nsp.h>
-#include <net/dn_dev.h>
-#include <net/dn_route.h>
-#include <net/dn_fib.h>
-#include <net/dn_neigh.h>
-
-struct dn_sock {
-	struct sock sk;
-	struct dn_scp scp;
-};
-
-static void dn_keepalive(struct sock *sk);
-
-#define DN_SK_HASH_SHIFT 8
-#define DN_SK_HASH_SIZE (1 << DN_SK_HASH_SHIFT)
-#define DN_SK_HASH_MASK (DN_SK_HASH_SIZE - 1)
-
-
-static const struct proto_ops dn_proto_ops;
-static DEFINE_RWLOCK(dn_hash_lock);
-static struct hlist_head dn_sk_hash[DN_SK_HASH_SIZE];
-static struct hlist_head dn_wild_sk;
-static atomic_long_t decnet_memory_allocated;
-static DEFINE_PER_CPU(int, decnet_memory_per_cpu_fw_alloc);
-
-static int __dn_setsockopt(struct socket *sock, int level, int optname,
-		sockptr_t optval, unsigned int optlen, int flags);
-static int __dn_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen, int flags);
-
-static struct hlist_head *dn_find_list(struct sock *sk)
-{
-	struct dn_scp *scp = DN_SK(sk);
-
-	if (scp->addr.sdn_flags & SDF_WILD)
-		return hlist_empty(&dn_wild_sk) ? &dn_wild_sk : NULL;
-
-	return &dn_sk_hash[le16_to_cpu(scp->addrloc) & DN_SK_HASH_MASK];
-}
-
-/*
- * Valid ports are those greater than zero and not already in use.
- */
-static int check_port(__le16 port)
-{
-	struct sock *sk;
-
-	if (port == 0)
-		return -1;
-
-	sk_for_each(sk, &dn_sk_hash[le16_to_cpu(port) & DN_SK_HASH_MASK]) {
-		struct dn_scp *scp = DN_SK(sk);
-		if (scp->addrloc == port)
-			return -1;
-	}
-	return 0;
-}
-
-static unsigned short port_alloc(struct sock *sk)
-{
-	struct dn_scp *scp = DN_SK(sk);
-	static unsigned short port = 0x2000;
-	unsigned short i_port = port;
-
-	while(check_port(cpu_to_le16(++port)) != 0) {
-		if (port == i_port)
-			return 0;
-	}
-
-	scp->addrloc = cpu_to_le16(port);
-
-	return 1;
-}
-
-/*
- * Since this is only ever called from user
- * level, we don't need a write_lock() version
- * of this.
- */
-static int dn_hash_sock(struct sock *sk)
-{
-	struct dn_scp *scp = DN_SK(sk);
-	struct hlist_head *list;
-	int rv = -EUSERS;
-
-	BUG_ON(sk_hashed(sk));
-
-	write_lock_bh(&dn_hash_lock);
-
-	if (!scp->addrloc && !port_alloc(sk))
-		goto out;
-
-	rv = -EADDRINUSE;
-	if ((list = dn_find_list(sk)) == NULL)
-		goto out;
-
-	sk_add_node(sk, list);
-	rv = 0;
-out:
-	write_unlock_bh(&dn_hash_lock);
-	return rv;
-}
-
-static void dn_unhash_sock(struct sock *sk)
-{
-	write_lock(&dn_hash_lock);
-	sk_del_node_init(sk);
-	write_unlock(&dn_hash_lock);
-}
-
-static void dn_unhash_sock_bh(struct sock *sk)
-{
-	write_lock_bh(&dn_hash_lock);
-	sk_del_node_init(sk);
-	write_unlock_bh(&dn_hash_lock);
-}
-
-static struct hlist_head *listen_hash(struct sockaddr_dn *addr)
-{
-	int i;
-	unsigned int hash = addr->sdn_objnum;
-
-	if (hash == 0) {
-		hash = addr->sdn_objnamel;
-		for(i = 0; i < le16_to_cpu(addr->sdn_objnamel); i++) {
-			hash ^= addr->sdn_objname[i];
-			hash ^= (hash << 3);
-		}
-	}
-
-	return &dn_sk_hash[hash & DN_SK_HASH_MASK];
-}
-
-/*
- * Called to transform a socket from bound (i.e. with a local address)
- * into a listening socket (doesn't need a local port number) and rehashes
- * based upon the object name/number.
- */
-static void dn_rehash_sock(struct sock *sk)
-{
-	struct hlist_head *list;
-	struct dn_scp *scp = DN_SK(sk);
-
-	if (scp->addr.sdn_flags & SDF_WILD)
-		return;
-
-	write_lock_bh(&dn_hash_lock);
-	sk_del_node_init(sk);
-	DN_SK(sk)->addrloc = 0;
-	list = listen_hash(&DN_SK(sk)->addr);
-	sk_add_node(sk, list);
-	write_unlock_bh(&dn_hash_lock);
-}
-
-int dn_sockaddr2username(struct sockaddr_dn *sdn, unsigned char *buf, unsigned char type)
-{
-	int len = 2;
-
-	*buf++ = type;
-
-	switch (type) {
-	case 0:
-		*buf++ = sdn->sdn_objnum;
-		break;
-	case 1:
-		*buf++ = 0;
-		*buf++ = le16_to_cpu(sdn->sdn_objnamel);
-		memcpy(buf, sdn->sdn_objname, le16_to_cpu(sdn->sdn_objnamel));
-		len = 3 + le16_to_cpu(sdn->sdn_objnamel);
-		break;
-	case 2:
-		memset(buf, 0, 5);
-		buf += 5;
-		*buf++ = le16_to_cpu(sdn->sdn_objnamel);
-		memcpy(buf, sdn->sdn_objname, le16_to_cpu(sdn->sdn_objnamel));
-		len = 7 + le16_to_cpu(sdn->sdn_objnamel);
-		break;
-	}
-
-	return len;
-}
-
-/*
- * On reception of usernames, we handle types 1 and 0 for destination
- * addresses only. Types 2 and 4 are used for source addresses, but the
- * UIC, GIC are ignored and they are both treated the same way. Type 3
- * is never used as I've no idea what its purpose might be or what its
- * format is.
- */
-int dn_username2sockaddr(unsigned char *data, int len, struct sockaddr_dn *sdn, unsigned char *fmt)
-{
-	unsigned char type;
-	int size = len;
-	int namel = 12;
-
-	sdn->sdn_objnum = 0;
-	sdn->sdn_objnamel = cpu_to_le16(0);
-	memset(sdn->sdn_objname, 0, DN_MAXOBJL);
-
-	if (len < 2)
-		return -1;
-
-	len -= 2;
-	*fmt = *data++;
-	type = *data++;
-
-	switch (*fmt) {
-	case 0:
-		sdn->sdn_objnum = type;
-		return 2;
-	case 1:
-		namel = 16;
-		break;
-	case 2:
-		len  -= 4;
-		data += 4;
-		break;
-	case 4:
-		len  -= 8;
-		data += 8;
-		break;
-	default:
-		return -1;
-	}
-
-	len -= 1;
-
-	if (len < 0)
-		return -1;
-
-	sdn->sdn_objnamel = cpu_to_le16(*data++);
-	len -= le16_to_cpu(sdn->sdn_objnamel);
-
-	if ((len < 0) || (le16_to_cpu(sdn->sdn_objnamel) > namel))
-		return -1;
-
-	memcpy(sdn->sdn_objname, data, le16_to_cpu(sdn->sdn_objnamel));
-
-	return size - len;
-}
-
-struct sock *dn_sklist_find_listener(struct sockaddr_dn *addr)
-{
-	struct hlist_head *list = listen_hash(addr);
-	struct sock *sk;
-
-	read_lock(&dn_hash_lock);
-	sk_for_each(sk, list) {
-		struct dn_scp *scp = DN_SK(sk);
-		if (sk->sk_state != TCP_LISTEN)
-			continue;
-		if (scp->addr.sdn_objnum) {
-			if (scp->addr.sdn_objnum != addr->sdn_objnum)
-				continue;
-		} else {
-			if (addr->sdn_objnum)
-				continue;
-			if (scp->addr.sdn_objnamel != addr->sdn_objnamel)
-				continue;
-			if (memcmp(scp->addr.sdn_objname, addr->sdn_objname, le16_to_cpu(addr->sdn_objnamel)) != 0)
-				continue;
-		}
-		sock_hold(sk);
-		read_unlock(&dn_hash_lock);
-		return sk;
-	}
-
-	sk = sk_head(&dn_wild_sk);
-	if (sk) {
-		if (sk->sk_state == TCP_LISTEN)
-			sock_hold(sk);
-		else
-			sk = NULL;
-	}
-
-	read_unlock(&dn_hash_lock);
-	return sk;
-}
-
-struct sock *dn_find_by_skb(struct sk_buff *skb)
-{
-	struct dn_skb_cb *cb = DN_SKB_CB(skb);
-	struct sock *sk;
-	struct dn_scp *scp;
-
-	read_lock(&dn_hash_lock);
-	sk_for_each(sk, &dn_sk_hash[le16_to_cpu(cb->dst_port) & DN_SK_HASH_MASK]) {
-		scp = DN_SK(sk);
-		if (cb->src != dn_saddr2dn(&scp->peer))
-			continue;
-		if (cb->dst_port != scp->addrloc)
-			continue;
-		if (scp->addrrem && (cb->src_port != scp->addrrem))
-			continue;
-		sock_hold(sk);
-		goto found;
-	}
-	sk = NULL;
-found:
-	read_unlock(&dn_hash_lock);
-	return sk;
-}
-
-
-
-static void dn_destruct(struct sock *sk)
-{
-	struct dn_scp *scp = DN_SK(sk);
-
-	skb_queue_purge(&scp->data_xmit_queue);
-	skb_queue_purge(&scp->other_xmit_queue);
-	skb_queue_purge(&scp->other_receive_queue);
-
-	dst_release(rcu_dereference_protected(sk->sk_dst_cache, 1));
-}
-
-static unsigned long dn_memory_pressure;
-
-static void dn_enter_memory_pressure(struct sock *sk)
-{
-	if (!dn_memory_pressure) {
-		dn_memory_pressure = 1;
-	}
-}
-
-static struct proto dn_proto = {
-	.name			= "NSP",
-	.owner			= THIS_MODULE,
-	.enter_memory_pressure	= dn_enter_memory_pressure,
-	.memory_pressure	= &dn_memory_pressure,
-
-	.memory_allocated	= &decnet_memory_allocated,
-	.per_cpu_fw_alloc	= &decnet_memory_per_cpu_fw_alloc,
-
-	.sysctl_mem		= sysctl_decnet_mem,
-	.sysctl_wmem		= sysctl_decnet_wmem,
-	.sysctl_rmem		= sysctl_decnet_rmem,
-	.max_header		= DN_MAX_NSP_DATA_HEADER + 64,
-	.obj_size		= sizeof(struct dn_sock),
-};
-
-static struct sock *dn_alloc_sock(struct net *net, struct socket *sock, gfp_t gfp, int kern)
-{
-	struct dn_scp *scp;
-	struct sock *sk = sk_alloc(net, PF_DECnet, gfp, &dn_proto, kern);
-
-	if  (!sk)
-		goto out;
-
-	if (sock)
-		sock->ops = &dn_proto_ops;
-	sock_init_data(sock, sk);
-
-	sk->sk_backlog_rcv = dn_nsp_backlog_rcv;
-	sk->sk_destruct    = dn_destruct;
-	sk->sk_no_check_tx = 1;
-	sk->sk_family      = PF_DECnet;
-	sk->sk_protocol    = 0;
-	sk->sk_allocation  = gfp;
-	sk->sk_sndbuf	   = READ_ONCE(sysctl_decnet_wmem[1]);
-	sk->sk_rcvbuf	   = READ_ONCE(sysctl_decnet_rmem[1]);
-
-	/* Initialization of DECnet Session Control Port		*/
-	scp = DN_SK(sk);
-	scp->state	= DN_O;		/* Open			*/
-	scp->numdat	= 1;		/* Next data seg to tx	*/
-	scp->numoth	= 1;		/* Next oth data to tx  */
-	scp->ackxmt_dat = 0;		/* Last data seg ack'ed */
-	scp->ackxmt_oth = 0;		/* Last oth data ack'ed */
-	scp->ackrcv_dat = 0;		/* Highest data ack recv*/
-	scp->ackrcv_oth = 0;		/* Last oth data ack rec*/
-	scp->flowrem_sw = DN_SEND;
-	scp->flowloc_sw = DN_SEND;
-	scp->flowrem_dat = 0;
-	scp->flowrem_oth = 1;
-	scp->flowloc_dat = 0;
-	scp->flowloc_oth = 1;
-	scp->services_rem = 0;
-	scp->services_loc = 1 | NSP_FC_NONE;
-	scp->info_rem = 0;
-	scp->info_loc = 0x03; /* NSP version 4.1 */
-	scp->segsize_rem = 230 - DN_MAX_NSP_DATA_HEADER; /* Default: Updated by remote segsize */
-	scp->nonagle = 0;
-	scp->multi_ireq = 1;
-	scp->accept_mode = ACC_IMMED;
-	scp->addr.sdn_family    = AF_DECnet;
-	scp->peer.sdn_family    = AF_DECnet;
-	scp->accessdata.acc_accl = 5;
-	memcpy(scp->accessdata.acc_acc, "LINUX", 5);
-
-	scp->max_window   = NSP_MAX_WINDOW;
-	scp->snd_window   = NSP_MIN_WINDOW;
-	scp->nsp_srtt     = NSP_INITIAL_SRTT;
-	scp->nsp_rttvar   = NSP_INITIAL_RTTVAR;
-	scp->nsp_rxtshift = 0;
-
-	skb_queue_head_init(&scp->data_xmit_queue);
-	skb_queue_head_init(&scp->other_xmit_queue);
-	skb_queue_head_init(&scp->other_receive_queue);
-
-	scp->persist = 0;
-	scp->persist_fxn = NULL;
-	scp->keepalive = 10 * HZ;
-	scp->keepalive_fxn = dn_keepalive;
-
-	dn_start_slow_timer(sk);
-out:
-	return sk;
-}
-
-/*
- * Keepalive timer.
- * FIXME: Should respond to SO_KEEPALIVE etc.
- */
-static void dn_keepalive(struct sock *sk)
-{
-	struct dn_scp *scp = DN_SK(sk);
-
-	/*
-	 * By checking the other_data transmit queue is empty
-	 * we are double checking that we are not sending too
-	 * many of these keepalive frames.
-	 */
-	if (skb_queue_empty(&scp->other_xmit_queue))
-		dn_nsp_send_link(sk, DN_NOCHANGE, 0);
-}
-
-
-/*
- * Timer for shutdown/destroyed sockets.
- * When socket is dead & no packets have been sent for a
- * certain amount of time, they are removed by this
- * routine. Also takes care of sending out DI & DC
- * frames at correct times.
- */
-int dn_destroy_timer(struct sock *sk)
-{
-	struct dn_scp *scp = DN_SK(sk);
-
-	scp->persist = dn_nsp_persist(sk);
-
-	switch (scp->state) {
-	case DN_DI:
-		dn_nsp_send_disc(sk, NSP_DISCINIT, 0, GFP_ATOMIC);
-		if (scp->nsp_rxtshift >= decnet_di_count)
-			scp->state = DN_CN;
-		return 0;
-
-	case DN_DR:
-		dn_nsp_send_disc(sk, NSP_DISCINIT, 0, GFP_ATOMIC);
-		if (scp->nsp_rxtshift >= decnet_dr_count)
-			scp->state = DN_DRC;
-		return 0;
-
-	case DN_DN:
-		if (scp->nsp_rxtshift < decnet_dn_count) {
-			/* printk(KERN_DEBUG "dn_destroy_timer: DN\n"); */
-			dn_nsp_send_disc(sk, NSP_DISCCONF, NSP_REASON_DC,
-					 GFP_ATOMIC);
-			return 0;
-		}
-	}
-
-	scp->persist = (HZ * decnet_time_wait);
-
-	if (sk->sk_socket)
-		return 0;
-
-	if (time_after_eq(jiffies, scp->stamp + HZ * decnet_time_wait)) {
-		dn_unhash_sock(sk);
-		sock_put(sk);
-		return 1;
-	}
-
-	return 0;
-}
-
-static void dn_destroy_sock(struct sock *sk)
-{
-	struct dn_scp *scp = DN_SK(sk);
-
-	scp->nsp_rxtshift = 0; /* reset back off */
-
-	if (sk->sk_socket) {
-		if (sk->sk_socket->state != SS_UNCONNECTED)
-			sk->sk_socket->state = SS_DISCONNECTING;
-	}
-
-	sk->sk_state = TCP_CLOSE;
-
-	switch (scp->state) {
-	case DN_DN:
-		dn_nsp_send_disc(sk, NSP_DISCCONF, NSP_REASON_DC,
-				 sk->sk_allocation);
-		scp->persist_fxn = dn_destroy_timer;
-		scp->persist = dn_nsp_persist(sk);
-		break;
-	case DN_CR:
-		scp->state = DN_DR;
-		goto disc_reject;
-	case DN_RUN:
-		scp->state = DN_DI;
-		fallthrough;
-	case DN_DI:
-	case DN_DR:
-disc_reject:
-		dn_nsp_send_disc(sk, NSP_DISCINIT, 0, sk->sk_allocation);
-		fallthrough;
-	case DN_NC:
-	case DN_NR:
-	case DN_RJ:
-	case DN_DIC:
-	case DN_CN:
-	case DN_DRC:
-	case DN_CI:
-	case DN_CD:
-		scp->persist_fxn = dn_destroy_timer;
-		scp->persist = dn_nsp_persist(sk);
-		break;
-	default:
-		printk(KERN_DEBUG "DECnet: dn_destroy_sock passed socket in invalid state\n");
-		fallthrough;
-	case DN_O:
-		dn_stop_slow_timer(sk);
-
-		dn_unhash_sock_bh(sk);
-		sock_put(sk);
-
-		break;
-	}
-}
-
-char *dn_addr2asc(__u16 addr, char *buf)
-{
-	unsigned short node, area;
-
-	node = addr & 0x03ff;
-	area = addr >> 10;
-	sprintf(buf, "%hd.%hd", area, node);
-
-	return buf;
-}
-
-
-
-static int dn_create(struct net *net, struct socket *sock, int protocol,
-		     int kern)
-{
-	struct sock *sk;
-
-	if (protocol < 0 || protocol > U8_MAX)
-		return -EINVAL;
-
-	if (!net_eq(net, &init_net))
-		return -EAFNOSUPPORT;
-
-	switch (sock->type) {
-	case SOCK_SEQPACKET:
-		if (protocol != DNPROTO_NSP)
-			return -EPROTONOSUPPORT;
-		break;
-	case SOCK_STREAM:
-		break;
-	default:
-		return -ESOCKTNOSUPPORT;
-	}
-
-
-	if ((sk = dn_alloc_sock(net, sock, GFP_KERNEL, kern)) == NULL)
-		return -ENOBUFS;
-
-	sk->sk_protocol = protocol;
-
-	return 0;
-}
-
-
-static int
-dn_release(struct socket *sock)
-{
-	struct sock *sk = sock->sk;
-
-	if (sk) {
-		sock_orphan(sk);
-		sock_hold(sk);
-		lock_sock(sk);
-		dn_destroy_sock(sk);
-		release_sock(sk);
-		sock_put(sk);
-	}
-
-	return 0;
-}
-
-static int dn_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
-{
-	struct sock *sk = sock->sk;
-	struct dn_scp *scp = DN_SK(sk);
-	struct sockaddr_dn *saddr = (struct sockaddr_dn *)uaddr;
-	struct net_device *dev, *ldev;
-	int rv;
-
-	if (addr_len != sizeof(struct sockaddr_dn))
-		return -EINVAL;
-
-	if (saddr->sdn_family != AF_DECnet)
-		return -EINVAL;
-
-	if (le16_to_cpu(saddr->sdn_nodeaddrl) && (le16_to_cpu(saddr->sdn_nodeaddrl) != 2))
-		return -EINVAL;
-
-	if (le16_to_cpu(saddr->sdn_objnamel) > DN_MAXOBJL)
-		return -EINVAL;
-
-	if (saddr->sdn_flags & ~SDF_WILD)
-		return -EINVAL;
-
-	if (!capable(CAP_NET_BIND_SERVICE) && (saddr->sdn_objnum ||
-	    (saddr->sdn_flags & SDF_WILD)))
-		return -EACCES;
-
-	if (!(saddr->sdn_flags & SDF_WILD)) {
-		if (le16_to_cpu(saddr->sdn_nodeaddrl)) {
-			rcu_read_lock();
-			ldev = NULL;
-			for_each_netdev_rcu(&init_net, dev) {
-				if (!dev->dn_ptr)
-					continue;
-				if (dn_dev_islocal(dev, dn_saddr2dn(saddr))) {
-					ldev = dev;
-					break;
-				}
-			}
-			rcu_read_unlock();
-			if (ldev == NULL)
-				return -EADDRNOTAVAIL;
-		}
-	}
-
-	rv = -EINVAL;
-	lock_sock(sk);
-	if (sock_flag(sk, SOCK_ZAPPED)) {
-		memcpy(&scp->addr, saddr, addr_len);
-		sock_reset_flag(sk, SOCK_ZAPPED);
-
-		rv = dn_hash_sock(sk);
-		if (rv)
-			sock_set_flag(sk, SOCK_ZAPPED);
-	}
-	release_sock(sk);
-
-	return rv;
-}
-
-
-static int dn_auto_bind(struct socket *sock)
-{
-	struct sock *sk = sock->sk;
-	struct dn_scp *scp = DN_SK(sk);
-	int rv;
-
-	sock_reset_flag(sk, SOCK_ZAPPED);
-
-	scp->addr.sdn_flags  = 0;
-	scp->addr.sdn_objnum = 0;
-
-	/*
-	 * This stuff is to keep compatibility with Eduardo's
-	 * patch. I hope I can dispense with it shortly...
-	 */
-	if ((scp->accessdata.acc_accl != 0) &&
-		(scp->accessdata.acc_accl <= 12)) {
-
-		scp->addr.sdn_objnamel = cpu_to_le16(scp->accessdata.acc_accl);
-		memcpy(scp->addr.sdn_objname, scp->accessdata.acc_acc, le16_to_cpu(scp->addr.sdn_objnamel));
-
-		scp->accessdata.acc_accl = 0;
-		memset(scp->accessdata.acc_acc, 0, 40);
-	}
-	/* End of compatibility stuff */
-
-	scp->addr.sdn_add.a_len = cpu_to_le16(2);
-	rv = dn_dev_bind_default((__le16 *)scp->addr.sdn_add.a_addr);
-	if (rv == 0) {
-		rv = dn_hash_sock(sk);
-		if (rv)
-			sock_set_flag(sk, SOCK_ZAPPED);
-	}
-
-	return rv;
-}
-
-static int dn_confirm_accept(struct sock *sk, long *timeo, gfp_t allocation)
-{
-	struct dn_scp *scp = DN_SK(sk);
-	DEFINE_WAIT_FUNC(wait, woken_wake_function);
-	int err;
-
-	if (scp->state != DN_CR)
-		return -EINVAL;
-
-	scp->state = DN_CC;
-	scp->segsize_loc = dst_metric_advmss(__sk_dst_get(sk));
-	dn_send_conn_conf(sk, allocation);
-
-	add_wait_queue(sk_sleep(sk), &wait);
-	for(;;) {
-		release_sock(sk);
-		if (scp->state == DN_CC)
-			*timeo = wait_woken(&wait, TASK_INTERRUPTIBLE, *timeo);
-		lock_sock(sk);
-		err = 0;
-		if (scp->state == DN_RUN)
-			break;
-		err = sock_error(sk);
-		if (err)
-			break;
-		err = sock_intr_errno(*timeo);
-		if (signal_pending(current))
-			break;
-		err = -EAGAIN;
-		if (!*timeo)
-			break;
-	}
-	remove_wait_queue(sk_sleep(sk), &wait);
-	if (err == 0) {
-		sk->sk_socket->state = SS_CONNECTED;
-	} else if (scp->state != DN_CC) {
-		sk->sk_socket->state = SS_UNCONNECTED;
-	}
-	return err;
-}
-
-static int dn_wait_run(struct sock *sk, long *timeo)
-{
-	struct dn_scp *scp = DN_SK(sk);
-	DEFINE_WAIT_FUNC(wait, woken_wake_function);
-	int err = 0;
-
-	if (scp->state == DN_RUN)
-		goto out;
-
-	if (!*timeo)
-		return -EALREADY;
-
-	add_wait_queue(sk_sleep(sk), &wait);
-	for(;;) {
-		release_sock(sk);
-		if (scp->state == DN_CI || scp->state == DN_CC)
-			*timeo = wait_woken(&wait, TASK_INTERRUPTIBLE, *timeo);
-		lock_sock(sk);
-		err = 0;
-		if (scp->state == DN_RUN)
-			break;
-		err = sock_error(sk);
-		if (err)
-			break;
-		err = sock_intr_errno(*timeo);
-		if (signal_pending(current))
-			break;
-		err = -ETIMEDOUT;
-		if (!*timeo)
-			break;
-	}
-	remove_wait_queue(sk_sleep(sk), &wait);
-out:
-	if (err == 0) {
-		sk->sk_socket->state = SS_CONNECTED;
-	} else if (scp->state != DN_CI && scp->state != DN_CC) {
-		sk->sk_socket->state = SS_UNCONNECTED;
-	}
-	return err;
-}
-
-static int __dn_connect(struct sock *sk, struct sockaddr_dn *addr, int addrlen, long *timeo, int flags)
-{
-	struct socket *sock = sk->sk_socket;
-	struct dn_scp *scp = DN_SK(sk);
-	int err = -EISCONN;
-	struct flowidn fld;
-	struct dst_entry *dst;
-
-	if (sock->state == SS_CONNECTED)
-		goto out;
-
-	if (sock->state == SS_CONNECTING) {
-		err = 0;
-		if (scp->state == DN_RUN) {
-			sock->state = SS_CONNECTED;
-			goto out;
-		}
-		err = -ECONNREFUSED;
-		if (scp->state != DN_CI && scp->state != DN_CC) {
-			sock->state = SS_UNCONNECTED;
-			goto out;
-		}
-		return dn_wait_run(sk, timeo);
-	}
-
-	err = -EINVAL;
-	if (scp->state != DN_O)
-		goto out;
-
-	if (addr == NULL || addrlen != sizeof(struct sockaddr_dn))
-		goto out;
-	if (addr->sdn_family != AF_DECnet)
-		goto out;
-	if (addr->sdn_flags & SDF_WILD)
-		goto out;
-
-	if (sock_flag(sk, SOCK_ZAPPED)) {
-		err = dn_auto_bind(sk->sk_socket);
-		if (err)
-			goto out;
-	}
-
-	memcpy(&scp->peer, addr, sizeof(struct sockaddr_dn));
-
-	err = -EHOSTUNREACH;
-	memset(&fld, 0, sizeof(fld));
-	fld.flowidn_oif = sk->sk_bound_dev_if;
-	fld.daddr = dn_saddr2dn(&scp->peer);
-	fld.saddr = dn_saddr2dn(&scp->addr);
-	dn_sk_ports_copy(&fld, scp);
-	fld.flowidn_proto = DNPROTO_NSP;
-	if (dn_route_output_sock(&sk->sk_dst_cache, &fld, sk, flags) < 0)
-		goto out;
-	dst = __sk_dst_get(sk);
-	sk->sk_route_caps = dst->dev->features;
-	sock->state = SS_CONNECTING;
-	scp->state = DN_CI;
-	scp->segsize_loc = dst_metric_advmss(dst);
-
-	dn_nsp_send_conninit(sk, NSP_CI);
-	err = -EINPROGRESS;
-	if (*timeo) {
-		err = dn_wait_run(sk, timeo);
-	}
-out:
-	return err;
-}
-
-static int dn_connect(struct socket *sock, struct sockaddr *uaddr, int addrlen, int flags)
-{
-	struct sockaddr_dn *addr = (struct sockaddr_dn *)uaddr;
-	struct sock *sk = sock->sk;
-	int err;
-	long timeo = sock_sndtimeo(sk, flags & O_NONBLOCK);
-
-	lock_sock(sk);
-	err = __dn_connect(sk, addr, addrlen, &timeo, 0);
-	release_sock(sk);
-
-	return err;
-}
-
-static inline int dn_check_state(struct sock *sk, struct sockaddr_dn *addr, int addrlen, long *timeo, int flags)
-{
-	struct dn_scp *scp = DN_SK(sk);
-
-	switch (scp->state) {
-	case DN_RUN:
-		return 0;
-	case DN_CR:
-		return dn_confirm_accept(sk, timeo, sk->sk_allocation);
-	case DN_CI:
-	case DN_CC:
-		return dn_wait_run(sk, timeo);
-	case DN_O:
-		return __dn_connect(sk, addr, addrlen, timeo, flags);
-	}
-
-	return -EINVAL;
-}
-
-
-static void dn_access_copy(struct sk_buff *skb, struct accessdata_dn *acc)
-{
-	unsigned char *ptr = skb->data;
-
-	acc->acc_userl = *ptr++;
-	memcpy(&acc->acc_user, ptr, acc->acc_userl);
-	ptr += acc->acc_userl;
-
-	acc->acc_passl = *ptr++;
-	memcpy(&acc->acc_pass, ptr, acc->acc_passl);
-	ptr += acc->acc_passl;
-
-	acc->acc_accl = *ptr++;
-	memcpy(&acc->acc_acc, ptr, acc->acc_accl);
-
-	skb_pull(skb, acc->acc_accl + acc->acc_passl + acc->acc_userl + 3);
-
-}
-
-static void dn_user_copy(struct sk_buff *skb, struct optdata_dn *opt)
-{
-	unsigned char *ptr = skb->data;
-	u16 len = *ptr++; /* yes, it's 8bit on the wire */
-
-	BUG_ON(len > 16); /* we've checked the contents earlier */
-	opt->opt_optl   = cpu_to_le16(len);
-	opt->opt_status = 0;
-	memcpy(opt->opt_data, ptr, len);
-	skb_pull(skb, len + 1);
-}
-
-static struct sk_buff *dn_wait_for_connect(struct sock *sk, long *timeo)
-{
-	DEFINE_WAIT_FUNC(wait, woken_wake_function);
-	struct sk_buff *skb = NULL;
-	int err = 0;
-
-	add_wait_queue(sk_sleep(sk), &wait);
-	for(;;) {
-		release_sock(sk);
-		skb = skb_dequeue(&sk->sk_receive_queue);
-		if (skb == NULL) {
-			*timeo = wait_woken(&wait, TASK_INTERRUPTIBLE, *timeo);
-			skb = skb_dequeue(&sk->sk_receive_queue);
-		}
-		lock_sock(sk);
-		if (skb != NULL)
-			break;
-		err = -EINVAL;
-		if (sk->sk_state != TCP_LISTEN)
-			break;
-		err = sock_intr_errno(*timeo);
-		if (signal_pending(current))
-			break;
-		err = -EAGAIN;
-		if (!*timeo)
-			break;
-	}
-	remove_wait_queue(sk_sleep(sk), &wait);
-
-	return skb == NULL ? ERR_PTR(err) : skb;
-}
-
-static int dn_accept(struct socket *sock, struct socket *newsock, int flags,
-		     bool kern)
-{
-	struct sock *sk = sock->sk, *newsk;
-	struct sk_buff *skb = NULL;
-	struct dn_skb_cb *cb;
-	unsigned char menuver;
-	int err = 0;
-	unsigned char type;
-	long timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK);
-	struct dst_entry *dst;
-
-	lock_sock(sk);
-
-	if (sk->sk_state != TCP_LISTEN || DN_SK(sk)->state != DN_O) {
-		release_sock(sk);
-		return -EINVAL;
-	}
-
-	skb = skb_dequeue(&sk->sk_receive_queue);
-	if (skb == NULL) {
-		skb = dn_wait_for_connect(sk, &timeo);
-		if (IS_ERR(skb)) {
-			release_sock(sk);
-			return PTR_ERR(skb);
-		}
-	}
-
-	cb = DN_SKB_CB(skb);
-	sk_acceptq_removed(sk);
-	newsk = dn_alloc_sock(sock_net(sk), newsock, sk->sk_allocation, kern);
-	if (newsk == NULL) {
-		release_sock(sk);
-		kfree_skb(skb);
-		return -ENOBUFS;
-	}
-	release_sock(sk);
-
-	dst = skb_dst(skb);
-	sk_dst_set(newsk, dst);
-	skb_dst_set(skb, NULL);
-
-	DN_SK(newsk)->state        = DN_CR;
-	DN_SK(newsk)->addrrem      = cb->src_port;
-	DN_SK(newsk)->services_rem = cb->services;
-	DN_SK(newsk)->info_rem     = cb->info;
-	DN_SK(newsk)->segsize_rem  = cb->segsize;
-	DN_SK(newsk)->accept_mode  = DN_SK(sk)->accept_mode;
-
-	if (DN_SK(newsk)->segsize_rem < 230)
-		DN_SK(newsk)->segsize_rem = 230;
-
-	if ((DN_SK(newsk)->services_rem & NSP_FC_MASK) == NSP_FC_NONE)
-		DN_SK(newsk)->max_window = decnet_no_fc_max_cwnd;
-
-	newsk->sk_state  = TCP_LISTEN;
-	memcpy(&(DN_SK(newsk)->addr), &(DN_SK(sk)->addr), sizeof(struct sockaddr_dn));
-
-	/*
-	 * If we are listening on a wild socket, we don't want
-	 * the newly created socket on the wrong hash queue.
-	 */
-	DN_SK(newsk)->addr.sdn_flags &= ~SDF_WILD;
-
-	skb_pull(skb, dn_username2sockaddr(skb->data, skb->len, &(DN_SK(newsk)->addr), &type));
-	skb_pull(skb, dn_username2sockaddr(skb->data, skb->len, &(DN_SK(newsk)->peer), &type));
-	*(__le16 *)(DN_SK(newsk)->peer.sdn_add.a_addr) = cb->src;
-	*(__le16 *)(DN_SK(newsk)->addr.sdn_add.a_addr) = cb->dst;
-
-	menuver = *skb->data;
-	skb_pull(skb, 1);
-
-	if (menuver & DN_MENUVER_ACC)
-		dn_access_copy(skb, &(DN_SK(newsk)->accessdata));
-
-	if (menuver & DN_MENUVER_USR)
-		dn_user_copy(skb, &(DN_SK(newsk)->conndata_in));
-
-	if (menuver & DN_MENUVER_PRX)
-		DN_SK(newsk)->peer.sdn_flags |= SDF_PROXY;
-
-	if (menuver & DN_MENUVER_UIC)
-		DN_SK(newsk)->peer.sdn_flags |= SDF_UICPROXY;
-
-	kfree_skb(skb);
-
-	memcpy(&(DN_SK(newsk)->conndata_out), &(DN_SK(sk)->conndata_out),
-		sizeof(struct optdata_dn));
-	memcpy(&(DN_SK(newsk)->discdata_out), &(DN_SK(sk)->discdata_out),
-		sizeof(struct optdata_dn));
-
-	lock_sock(newsk);
-	err = dn_hash_sock(newsk);
-	if (err == 0) {
-		sock_reset_flag(newsk, SOCK_ZAPPED);
-		dn_send_conn_ack(newsk);
-
-		/*
-		 * Here we use sk->sk_allocation since although the conn conf is
-		 * for the newsk, the context is the old socket.
-		 */
-		if (DN_SK(newsk)->accept_mode == ACC_IMMED)
-			err = dn_confirm_accept(newsk, &timeo,
-						sk->sk_allocation);
-	}
-	release_sock(newsk);
-	return err;
-}
-
-
-static int dn_getname(struct socket *sock, struct sockaddr *uaddr,int peer)
-{
-	struct sockaddr_dn *sa = (struct sockaddr_dn *)uaddr;
-	struct sock *sk = sock->sk;
-	struct dn_scp *scp = DN_SK(sk);
-
-	lock_sock(sk);
-
-	if (peer) {
-		if ((sock->state != SS_CONNECTED &&
-		     sock->state != SS_CONNECTING) &&
-		    scp->accept_mode == ACC_IMMED) {
-			release_sock(sk);
-			return -ENOTCONN;
-		}
-
-		memcpy(sa, &scp->peer, sizeof(struct sockaddr_dn));
-	} else {
-		memcpy(sa, &scp->addr, sizeof(struct sockaddr_dn));
-	}
-
-	release_sock(sk);
-
-	return sizeof(struct sockaddr_dn);
-}
-
-
-static __poll_t dn_poll(struct file *file, struct socket *sock, poll_table  *wait)
-{
-	struct sock *sk = sock->sk;
-	struct dn_scp *scp = DN_SK(sk);
-	__poll_t mask = datagram_poll(file, sock, wait);
-
-	if (!skb_queue_empty_lockless(&scp->other_receive_queue))
-		mask |= EPOLLRDBAND;
-
-	return mask;
-}
-
-static int dn_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
-{
-	struct sock *sk = sock->sk;
-	struct dn_scp *scp = DN_SK(sk);
-	int err = -EOPNOTSUPP;
-	long amount = 0;
-	struct sk_buff *skb;
-	int val;
-
-	switch(cmd)
-	{
-	case SIOCGIFADDR:
-	case SIOCSIFADDR:
-		return dn_dev_ioctl(cmd, (void __user *)arg);
-
-	case SIOCATMARK:
-		lock_sock(sk);
-		val = !skb_queue_empty(&scp->other_receive_queue);
-		if (scp->state != DN_RUN)
-			val = -ENOTCONN;
-		release_sock(sk);
-		return val;
-
-	case TIOCOUTQ:
-		amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
-		if (amount < 0)
-			amount = 0;
-		err = put_user(amount, (int __user *)arg);
-		break;
-
-	case TIOCINQ:
-		lock_sock(sk);
-		skb = skb_peek(&scp->other_receive_queue);
-		if (skb) {
-			amount = skb->len;
-		} else {
-			skb_queue_walk(&sk->sk_receive_queue, skb)
-				amount += skb->len;
-		}
-		release_sock(sk);
-		err = put_user(amount, (int __user *)arg);
-		break;
-
-	default:
-		err = -ENOIOCTLCMD;
-		break;
-	}
-
-	return err;
-}
-
-static int dn_listen(struct socket *sock, int backlog)
-{
-	struct sock *sk = sock->sk;
-	int err = -EINVAL;
-
-	lock_sock(sk);
-
-	if (sock_flag(sk, SOCK_ZAPPED))
-		goto out;
-
-	if ((DN_SK(sk)->state != DN_O) || (sk->sk_state == TCP_LISTEN))
-		goto out;
-
-	sk->sk_max_ack_backlog = backlog;
-	sk->sk_ack_backlog     = 0;
-	sk->sk_state           = TCP_LISTEN;
-	err                 = 0;
-	dn_rehash_sock(sk);
-
-out:
-	release_sock(sk);
-
-	return err;
-}
-
-
-static int dn_shutdown(struct socket *sock, int how)
-{
-	struct sock *sk = sock->sk;
-	struct dn_scp *scp = DN_SK(sk);
-	int err = -ENOTCONN;
-
-	lock_sock(sk);
-
-	if (sock->state == SS_UNCONNECTED)
-		goto out;
-
-	err = 0;
-	if (sock->state == SS_DISCONNECTING)
-		goto out;
-
-	err = -EINVAL;
-	if (scp->state == DN_O)
-		goto out;
-
-	if (how != SHUT_RDWR)
-		goto out;
-
-	sk->sk_shutdown = SHUTDOWN_MASK;
-	dn_destroy_sock(sk);
-	err = 0;
-
-out:
-	release_sock(sk);
-
-	return err;
-}
-
-static int dn_setsockopt(struct socket *sock, int level, int optname,
-		sockptr_t optval, unsigned int optlen)
-{
-	struct sock *sk = sock->sk;
-	int err;
-
-	lock_sock(sk);
-	err = __dn_setsockopt(sock, level, optname, optval, optlen, 0);
-	release_sock(sk);
-#ifdef CONFIG_NETFILTER
-	/* we need to exclude all possible ENOPROTOOPTs except default case */
-	if (err == -ENOPROTOOPT && optname != DSO_LINKINFO &&
-	    optname != DSO_STREAM && optname != DSO_SEQPACKET)
-		err = nf_setsockopt(sk, PF_DECnet, optname, optval, optlen);
-#endif
-
-	return err;
-}
-
-static int __dn_setsockopt(struct socket *sock, int level, int optname,
-		sockptr_t optval, unsigned int optlen, int flags)
-{
-	struct	sock *sk = sock->sk;
-	struct dn_scp *scp = DN_SK(sk);
-	long timeo;
-	union {
-		struct optdata_dn opt;
-		struct accessdata_dn acc;
-		int mode;
-		unsigned long win;
-		int val;
-		unsigned char services;
-		unsigned char info;
-	} u;
-	int err;
-
-	if (optlen && sockptr_is_null(optval))
-		return -EINVAL;
-
-	if (optlen > sizeof(u))
-		return -EINVAL;
-
-	if (copy_from_sockptr(&u, optval, optlen))
-		return -EFAULT;
-
-	switch (optname) {
-	case DSO_CONDATA:
-		if (sock->state == SS_CONNECTED)
-			return -EISCONN;
-		if ((scp->state != DN_O) && (scp->state != DN_CR))
-			return -EINVAL;
-
-		if (optlen != sizeof(struct optdata_dn))
-			return -EINVAL;
-
-		if (le16_to_cpu(u.opt.opt_optl) > 16)
-			return -EINVAL;
-
-		memcpy(&scp->conndata_out, &u.opt, optlen);
-		break;
-
-	case DSO_DISDATA:
-		if (sock->state != SS_CONNECTED &&
-		    scp->accept_mode == ACC_IMMED)
-			return -ENOTCONN;
-
-		if (optlen != sizeof(struct optdata_dn))
-			return -EINVAL;
-
-		if (le16_to_cpu(u.opt.opt_optl) > 16)
-			return -EINVAL;
-
-		memcpy(&scp->discdata_out, &u.opt, optlen);
-		break;
-
-	case DSO_CONACCESS:
-		if (sock->state == SS_CONNECTED)
-			return -EISCONN;
-		if (scp->state != DN_O)
-			return -EINVAL;
-
-		if (optlen != sizeof(struct accessdata_dn))
-			return -EINVAL;
-
-		if ((u.acc.acc_accl > DN_MAXACCL) ||
-		    (u.acc.acc_passl > DN_MAXACCL) ||
-		    (u.acc.acc_userl > DN_MAXACCL))
-			return -EINVAL;
-
-		memcpy(&scp->accessdata, &u.acc, optlen);
-		break;
-
-	case DSO_ACCEPTMODE:
-		if (sock->state == SS_CONNECTED)
-			return -EISCONN;
-		if (scp->state != DN_O)
-			return -EINVAL;
-
-		if (optlen != sizeof(int))
-			return -EINVAL;
-
-		if ((u.mode != ACC_IMMED) && (u.mode != ACC_DEFER))
-			return -EINVAL;
-
-		scp->accept_mode = (unsigned char)u.mode;
-		break;
-
-	case DSO_CONACCEPT:
-		if (scp->state != DN_CR)
-			return -EINVAL;
-		timeo = sock_rcvtimeo(sk, 0);
-		err = dn_confirm_accept(sk, &timeo, sk->sk_allocation);
-		return err;
-
-	case DSO_CONREJECT:
-		if (scp->state != DN_CR)
-			return -EINVAL;
-
-		scp->state = DN_DR;
-		sk->sk_shutdown = SHUTDOWN_MASK;
-		dn_nsp_send_disc(sk, 0x38, 0, sk->sk_allocation);
-		break;
-
-	case DSO_MAXWINDOW:
-		if (optlen != sizeof(unsigned long))
-			return -EINVAL;
-		if (u.win > NSP_MAX_WINDOW)
-			u.win = NSP_MAX_WINDOW;
-		if (u.win == 0)
-			return -EINVAL;
-		scp->max_window = u.win;
-		if (scp->snd_window > u.win)
-			scp->snd_window = u.win;
-		break;
-
-	case DSO_NODELAY:
-		if (optlen != sizeof(int))
-			return -EINVAL;
-		if (scp->nonagle == TCP_NAGLE_CORK)
-			return -EINVAL;
-		scp->nonagle = (u.val == 0) ? 0 : TCP_NAGLE_OFF;
-		/* if (scp->nonagle == 1) { Push pending frames } */
-		break;
-
-	case DSO_CORK:
-		if (optlen != sizeof(int))
-			return -EINVAL;
-		if (scp->nonagle == TCP_NAGLE_OFF)
-			return -EINVAL;
-		scp->nonagle = (u.val == 0) ? 0 : TCP_NAGLE_CORK;
-		/* if (scp->nonagle == 0) { Push pending frames } */
-		break;
-
-	case DSO_SERVICES:
-		if (optlen != sizeof(unsigned char))
-			return -EINVAL;
-		if ((u.services & ~NSP_FC_MASK) != 0x01)
-			return -EINVAL;
-		if ((u.services & NSP_FC_MASK) == NSP_FC_MASK)
-			return -EINVAL;
-		scp->services_loc = u.services;
-		break;
-
-	case DSO_INFO:
-		if (optlen != sizeof(unsigned char))
-			return -EINVAL;
-		if (u.info & 0xfc)
-			return -EINVAL;
-		scp->info_loc = u.info;
-		break;
-
-	case DSO_LINKINFO:
-	case DSO_STREAM:
-	case DSO_SEQPACKET:
-	default:
-		return -ENOPROTOOPT;
-	}
-
-	return 0;
-}
-
-static int dn_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen)
-{
-	struct sock *sk = sock->sk;
-	int err;
-
-	lock_sock(sk);
-	err = __dn_getsockopt(sock, level, optname, optval, optlen, 0);
-	release_sock(sk);
-#ifdef CONFIG_NETFILTER
-	if (err == -ENOPROTOOPT && optname != DSO_STREAM &&
-	    optname != DSO_SEQPACKET && optname != DSO_CONACCEPT &&
-	    optname != DSO_CONREJECT) {
-		int len;
-
-		if (get_user(len, optlen))
-			return -EFAULT;
-
-		err = nf_getsockopt(sk, PF_DECnet, optname, optval, &len);
-		if (err >= 0)
-			err = put_user(len, optlen);
-	}
-#endif
-
-	return err;
-}
-
-static int __dn_getsockopt(struct socket *sock, int level,int optname, char __user *optval,int __user *optlen, int flags)
-{
-	struct	sock *sk = sock->sk;
-	struct dn_scp *scp = DN_SK(sk);
-	struct linkinfo_dn link;
-	unsigned int r_len;
-	void *r_data = NULL;
-	unsigned int val;
-
-	if(get_user(r_len , optlen))
-		return -EFAULT;
-
-	switch (optname) {
-	case DSO_CONDATA:
-		if (r_len > sizeof(struct optdata_dn))
-			r_len = sizeof(struct optdata_dn);
-		r_data = &scp->conndata_in;
-		break;
-
-	case DSO_DISDATA:
-		if (r_len > sizeof(struct optdata_dn))
-			r_len = sizeof(struct optdata_dn);
-		r_data = &scp->discdata_in;
-		break;
-
-	case DSO_CONACCESS:
-		if (r_len > sizeof(struct accessdata_dn))
-			r_len = sizeof(struct accessdata_dn);
-		r_data = &scp->accessdata;
-		break;
-
-	case DSO_ACCEPTMODE:
-		if (r_len > sizeof(unsigned char))
-			r_len = sizeof(unsigned char);
-		r_data = &scp->accept_mode;
-		break;
-
-	case DSO_LINKINFO:
-		if (r_len > sizeof(struct linkinfo_dn))
-			r_len = sizeof(struct linkinfo_dn);
-
-		memset(&link, 0, sizeof(link));
-
-		switch (sock->state) {
-		case SS_CONNECTING:
-			link.idn_linkstate = LL_CONNECTING;
-			break;
-		case SS_DISCONNECTING:
-			link.idn_linkstate = LL_DISCONNECTING;
-			break;
-		case SS_CONNECTED:
-			link.idn_linkstate = LL_RUNNING;
-			break;
-		default:
-			link.idn_linkstate = LL_INACTIVE;
-		}
-
-		link.idn_segsize = scp->segsize_rem;
-		r_data = &link;
-		break;
-
-	case DSO_MAXWINDOW:
-		if (r_len > sizeof(unsigned long))
-			r_len = sizeof(unsigned long);
-		r_data = &scp->max_window;
-		break;
-
-	case DSO_NODELAY:
-		if (r_len > sizeof(int))
-			r_len = sizeof(int);
-		val = (scp->nonagle == TCP_NAGLE_OFF);
-		r_data = &val;
-		break;
-
-	case DSO_CORK:
-		if (r_len > sizeof(int))
-			r_len = sizeof(int);
-		val = (scp->nonagle == TCP_NAGLE_CORK);
-		r_data = &val;
-		break;
-
-	case DSO_SERVICES:
-		if (r_len > sizeof(unsigned char))
-			r_len = sizeof(unsigned char);
-		r_data = &scp->services_rem;
-		break;
-
-	case DSO_INFO:
-		if (r_len > sizeof(unsigned char))
-			r_len = sizeof(unsigned char);
-		r_data = &scp->info_rem;
-		break;
-
-	case DSO_STREAM:
-	case DSO_SEQPACKET:
-	case DSO_CONACCEPT:
-	case DSO_CONREJECT:
-	default:
-		return -ENOPROTOOPT;
-	}
-
-	if (r_data) {
-		if (copy_to_user(optval, r_data, r_len))
-			return -EFAULT;
-		if (put_user(r_len, optlen))
-			return -EFAULT;
-	}
-
-	return 0;
-}
-
-
-static int dn_data_ready(struct sock *sk, struct sk_buff_head *q, int flags, int target)
-{
-	struct sk_buff *skb;
-	int len = 0;
-
-	if (flags & MSG_OOB)
-		return !skb_queue_empty(q) ? 1 : 0;
-
-	skb_queue_walk(q, skb) {
-		struct dn_skb_cb *cb = DN_SKB_CB(skb);
-		len += skb->len;
-
-		if (cb->nsp_flags & 0x40) {
-			/* SOCK_SEQPACKET reads to EOM */
-			if (sk->sk_type == SOCK_SEQPACKET)
-				return 1;
-			/* so does SOCK_STREAM unless WAITALL is specified */
-			if (!(flags & MSG_WAITALL))
-				return 1;
-		}
-
-		/* minimum data length for read exceeded */
-		if (len >= target)
-			return 1;
-	}
-
-	return 0;
-}
-
-
-static int dn_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
-		      int flags)
-{
-	struct sock *sk = sock->sk;
-	struct dn_scp *scp = DN_SK(sk);
-	struct sk_buff_head *queue = &sk->sk_receive_queue;
-	size_t target = size > 1 ? 1 : 0;
-	size_t copied = 0;
-	int rv = 0;
-	struct sk_buff *skb, *n;
-	struct dn_skb_cb *cb = NULL;
-	unsigned char eor = 0;
-	long timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT);
-
-	lock_sock(sk);
-
-	if (sock_flag(sk, SOCK_ZAPPED)) {
-		rv = -EADDRNOTAVAIL;
-		goto out;
-	}
-
-	if (sk->sk_shutdown & RCV_SHUTDOWN) {
-		rv = 0;
-		goto out;
-	}
-
-	rv = dn_check_state(sk, NULL, 0, &timeo, flags);
-	if (rv)
-		goto out;
-
-	if (flags & ~(MSG_CMSG_COMPAT|MSG_PEEK|MSG_OOB|MSG_WAITALL|MSG_DONTWAIT|MSG_NOSIGNAL)) {
-		rv = -EOPNOTSUPP;
-		goto out;
-	}
-
-	if (flags & MSG_OOB)
-		queue = &scp->other_receive_queue;
-
-	if (flags & MSG_WAITALL)
-		target = size;
-
-
-	/*
-	 * See if there is data ready to read, sleep if there isn't
-	 */
-	for(;;) {
-		DEFINE_WAIT_FUNC(wait, woken_wake_function);
-
-		if (sk->sk_err)
-			goto out;
-
-		if (!skb_queue_empty(&scp->other_receive_queue)) {
-			if (!(flags & MSG_OOB)) {
-				msg->msg_flags |= MSG_OOB;
-				if (!scp->other_report) {
-					scp->other_report = 1;
-					goto out;
-				}
-			}
-		}
-
-		if (scp->state != DN_RUN)
-			goto out;
-
-		if (signal_pending(current)) {
-			rv = sock_intr_errno(timeo);
-			goto out;
-		}
-
-		if (dn_data_ready(sk, queue, flags, target))
-			break;
-
-		if (flags & MSG_DONTWAIT) {
-			rv = -EWOULDBLOCK;
-			goto out;
-		}
-
-		add_wait_queue(sk_sleep(sk), &wait);
-		sk_set_bit(SOCKWQ_ASYNC_WAITDATA, sk);
-		sk_wait_event(sk, &timeo, dn_data_ready(sk, queue, flags, target), &wait);
-		sk_clear_bit(SOCKWQ_ASYNC_WAITDATA, sk);
-		remove_wait_queue(sk_sleep(sk), &wait);
-	}
-
-	skb_queue_walk_safe(queue, skb, n) {
-		unsigned int chunk = skb->len;
-		cb = DN_SKB_CB(skb);
-
-		if ((chunk + copied) > size)
-			chunk = size - copied;
-
-		if (memcpy_to_msg(msg, skb->data, chunk)) {
-			rv = -EFAULT;
-			break;
-		}
-		copied += chunk;
-
-		if (!(flags & MSG_PEEK))
-			skb_pull(skb, chunk);
-
-		eor = cb->nsp_flags & 0x40;
-
-		if (skb->len == 0) {
-			skb_unlink(skb, queue);
-			kfree_skb(skb);
-			/*
-			 * N.B. Don't refer to skb or cb after this point
-			 * in loop.
-			 */
-			if ((scp->flowloc_sw == DN_DONTSEND) && !dn_congested(sk)) {
-				scp->flowloc_sw = DN_SEND;
-				dn_nsp_send_link(sk, DN_SEND, 0);
-			}
-		}
-
-		if (eor) {
-			if (sk->sk_type == SOCK_SEQPACKET)
-				break;
-			if (!(flags & MSG_WAITALL))
-				break;
-		}
-
-		if (flags & MSG_OOB)
-			break;
-
-		if (copied >= target)
-			break;
-	}
-
-	rv = copied;
-
-
-	if (eor && (sk->sk_type == SOCK_SEQPACKET))
-		msg->msg_flags |= MSG_EOR;
-
-out:
-	if (rv == 0)
-		rv = (flags & MSG_PEEK) ? -sk->sk_err : sock_error(sk);
-
-	if ((rv >= 0) && msg->msg_name) {
-		__sockaddr_check_size(sizeof(struct sockaddr_dn));
-		memcpy(msg->msg_name, &scp->peer, sizeof(struct sockaddr_dn));
-		msg->msg_namelen = sizeof(struct sockaddr_dn);
-	}
-
-	release_sock(sk);
-
-	return rv;
-}
-
-
-static inline int dn_queue_too_long(struct dn_scp *scp, struct sk_buff_head *queue, int flags)
-{
-	unsigned char fctype = scp->services_rem & NSP_FC_MASK;
-	if (skb_queue_len(queue) >= scp->snd_window)
-		return 1;
-	if (fctype != NSP_FC_NONE) {
-		if (flags & MSG_OOB) {
-			if (scp->flowrem_oth == 0)
-				return 1;
-		} else {
-			if (scp->flowrem_dat == 0)
-				return 1;
-		}
-	}
-	return 0;
-}
-
-/*
- * The DECnet spec requires that the "routing layer" accepts packets which
- * are at least 230 bytes in size. This excludes any headers which the NSP
- * layer might add, so we always assume that we'll be using the maximal
- * length header on data packets. The variation in length is due to the
- * inclusion (or not) of the two 16 bit acknowledgement fields so it doesn't
- * make much practical difference.
- */
-unsigned int dn_mss_from_pmtu(struct net_device *dev, int mtu)
-{
-	unsigned int mss = 230 - DN_MAX_NSP_DATA_HEADER;
-	if (dev) {
-		struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr);
-		mtu -= LL_RESERVED_SPACE(dev);
-		if (dn_db->use_long)
-			mtu -= 21;
-		else
-			mtu -= 6;
-		mtu -= DN_MAX_NSP_DATA_HEADER;
-	} else {
-		/*
-		 * 21 = long header, 16 = guess at MAC header length
-		 */
-		mtu -= (21 + DN_MAX_NSP_DATA_HEADER + 16);
-	}
-	if (mtu > mss)
-		mss = mtu;
-	return mss;
-}
-
-static inline unsigned int dn_current_mss(struct sock *sk, int flags)
-{
-	struct dst_entry *dst = __sk_dst_get(sk);
-	struct dn_scp *scp = DN_SK(sk);
-	int mss_now = min_t(int, scp->segsize_loc, scp->segsize_rem);
-
-	/* Other data messages are limited to 16 bytes per packet */
-	if (flags & MSG_OOB)
-		return 16;
-
-	/* This works out the maximum size of segment we can send out */
-	if (dst) {
-		u32 mtu = dst_mtu(dst);
-		mss_now = min_t(int, dn_mss_from_pmtu(dst->dev, mtu), mss_now);
-	}
-
-	return mss_now;
-}
-
-/*
- * N.B. We get the timeout wrong here, but then we always did get it
- * wrong before and this is another step along the road to correcting
- * it. It ought to get updated each time we pass through the routine,
- * but in practise it probably doesn't matter too much for now.
- */
-static inline struct sk_buff *dn_alloc_send_pskb(struct sock *sk,
-			      unsigned long datalen, int noblock,
-			      int *errcode)
-{
-	struct sk_buff *skb = sock_alloc_send_skb(sk, datalen,
-						   noblock, errcode);
-	if (skb) {
-		skb->protocol = htons(ETH_P_DNA_RT);
-		skb->pkt_type = PACKET_OUTGOING;
-	}
-	return skb;
-}
-
-static int dn_sendmsg(struct socket *sock, struct msghdr *msg, size_t size)
-{
-	struct sock *sk = sock->sk;
-	struct dn_scp *scp = DN_SK(sk);
-	size_t mss;
-	struct sk_buff_head *queue = &scp->data_xmit_queue;
-	int flags = msg->msg_flags;
-	int err = 0;
-	size_t sent = 0;
-	int addr_len = msg->msg_namelen;
-	DECLARE_SOCKADDR(struct sockaddr_dn *, addr, msg->msg_name);
-	struct sk_buff *skb = NULL;
-	struct dn_skb_cb *cb;
-	size_t len;
-	unsigned char fctype;
-	long timeo;
-
-	if (flags & ~(MSG_TRYHARD|MSG_OOB|MSG_DONTWAIT|MSG_EOR|MSG_NOSIGNAL|MSG_MORE|MSG_CMSG_COMPAT))
-		return -EOPNOTSUPP;
-
-	if (addr_len && (addr_len != sizeof(struct sockaddr_dn)))
-		return -EINVAL;
-
-	lock_sock(sk);
-	timeo = sock_sndtimeo(sk, flags & MSG_DONTWAIT);
-	/*
-	 * The only difference between stream sockets and sequenced packet
-	 * sockets is that the stream sockets always behave as if MSG_EOR
-	 * has been set.
-	 */
-	if (sock->type == SOCK_STREAM) {
-		if (flags & MSG_EOR) {
-			err = -EINVAL;
-			goto out;
-		}
-		flags |= MSG_EOR;
-	}
-
-
-	err = dn_check_state(sk, addr, addr_len, &timeo, flags);
-	if (err)
-		goto out_err;
-
-	if (sk->sk_shutdown & SEND_SHUTDOWN) {
-		err = -EPIPE;
-		if (!(flags & MSG_NOSIGNAL))
-			send_sig(SIGPIPE, current, 0);
-		goto out_err;
-	}
-
-	if ((flags & MSG_TRYHARD) && sk->sk_dst_cache)
-		dst_negative_advice(sk);
-
-	mss = scp->segsize_rem;
-	fctype = scp->services_rem & NSP_FC_MASK;
-
-	mss = dn_current_mss(sk, flags);
-
-	if (flags & MSG_OOB) {
-		queue = &scp->other_xmit_queue;
-		if (size > mss) {
-			err = -EMSGSIZE;
-			goto out;
-		}
-	}
-
-	scp->persist_fxn = dn_nsp_xmit_timeout;
-
-	while(sent < size) {
-		err = sock_error(sk);
-		if (err)
-			goto out;
-
-		if (signal_pending(current)) {
-			err = sock_intr_errno(timeo);
-			goto out;
-		}
-
-		/*
-		 * Calculate size that we wish to send.
-		 */
-		len = size - sent;
-
-		if (len > mss)
-			len = mss;
-
-		/*
-		 * Wait for queue size to go down below the window
-		 * size.
-		 */
-		if (dn_queue_too_long(scp, queue, flags)) {
-			DEFINE_WAIT_FUNC(wait, woken_wake_function);
-
-			if (flags & MSG_DONTWAIT) {
-				err = -EWOULDBLOCK;
-				goto out;
-			}
-
-			add_wait_queue(sk_sleep(sk), &wait);
-			sk_set_bit(SOCKWQ_ASYNC_WAITDATA, sk);
-			sk_wait_event(sk, &timeo,
-				      !dn_queue_too_long(scp, queue, flags), &wait);
-			sk_clear_bit(SOCKWQ_ASYNC_WAITDATA, sk);
-			remove_wait_queue(sk_sleep(sk), &wait);
-			continue;
-		}
-
-		/*
-		 * Get a suitably sized skb.
-		 * 64 is a bit of a hack really, but its larger than any
-		 * link-layer headers and has served us well as a good
-		 * guess as to their real length.
-		 */
-		skb = dn_alloc_send_pskb(sk, len + 64 + DN_MAX_NSP_DATA_HEADER,
-					 flags & MSG_DONTWAIT, &err);
-
-		if (err)
-			break;
-
-		if (!skb)
-			continue;
-
-		cb = DN_SKB_CB(skb);
-
-		skb_reserve(skb, 64 + DN_MAX_NSP_DATA_HEADER);
-
-		if (memcpy_from_msg(skb_put(skb, len), msg, len)) {
-			err = -EFAULT;
-			goto out;
-		}
-
-		if (flags & MSG_OOB) {
-			cb->nsp_flags = 0x30;
-			if (fctype != NSP_FC_NONE)
-				scp->flowrem_oth--;
-		} else {
-			cb->nsp_flags = 0x00;
-			if (scp->seg_total == 0)
-				cb->nsp_flags |= 0x20;
-
-			scp->seg_total += len;
-
-			if (((sent + len) == size) && (flags & MSG_EOR)) {
-				cb->nsp_flags |= 0x40;
-				scp->seg_total = 0;
-				if (fctype == NSP_FC_SCMC)
-					scp->flowrem_dat--;
-			}
-			if (fctype == NSP_FC_SRC)
-				scp->flowrem_dat--;
-		}
-
-		sent += len;
-		dn_nsp_queue_xmit(sk, skb, sk->sk_allocation, flags & MSG_OOB);
-		skb = NULL;
-
-		scp->persist = dn_nsp_persist(sk);
-
-	}
-out:
-
-	kfree_skb(skb);
-
-	release_sock(sk);
-
-	return sent ? sent : err;
-
-out_err:
-	err = sk_stream_error(sk, flags, err);
-	release_sock(sk);
-	return err;
-}
-
-static int dn_device_event(struct notifier_block *this, unsigned long event,
-			   void *ptr)
-{
-	struct net_device *dev = netdev_notifier_info_to_dev(ptr);
-
-	if (!net_eq(dev_net(dev), &init_net))
-		return NOTIFY_DONE;
-
-	switch (event) {
-	case NETDEV_UP:
-		dn_dev_up(dev);
-		break;
-	case NETDEV_DOWN:
-		dn_dev_down(dev);
-		break;
-	default:
-		break;
-	}
-
-	return NOTIFY_DONE;
-}
-
-static struct notifier_block dn_dev_notifier = {
-	.notifier_call = dn_device_event,
-};
-
-static struct packet_type dn_dix_packet_type __read_mostly = {
-	.type =		cpu_to_be16(ETH_P_DNA_RT),
-	.func =		dn_route_rcv,
-};
-
-#ifdef CONFIG_PROC_FS
-struct dn_iter_state {
-	int bucket;
-};
-
-static struct sock *dn_socket_get_first(struct seq_file *seq)
-{
-	struct dn_iter_state *state = seq->private;
-	struct sock *n = NULL;
-
-	for(state->bucket = 0;
-	    state->bucket < DN_SK_HASH_SIZE;
-	    ++state->bucket) {
-		n = sk_head(&dn_sk_hash[state->bucket]);
-		if (n)
-			break;
-	}
-
-	return n;
-}
-
-static struct sock *dn_socket_get_next(struct seq_file *seq,
-				       struct sock *n)
-{
-	struct dn_iter_state *state = seq->private;
-
-	n = sk_next(n);
-	while (!n) {
-		if (++state->bucket >= DN_SK_HASH_SIZE)
-			break;
-		n = sk_head(&dn_sk_hash[state->bucket]);
-	}
-	return n;
-}
-
-static struct sock *socket_get_idx(struct seq_file *seq, loff_t *pos)
-{
-	struct sock *sk = dn_socket_get_first(seq);
-
-	if (sk) {
-		while(*pos && (sk = dn_socket_get_next(seq, sk)))
-			--*pos;
-	}
-	return *pos ? NULL : sk;
-}
-
-static void *dn_socket_get_idx(struct seq_file *seq, loff_t pos)
-{
-	void *rc;
-	read_lock_bh(&dn_hash_lock);
-	rc = socket_get_idx(seq, &pos);
-	if (!rc) {
-		read_unlock_bh(&dn_hash_lock);
-	}
-	return rc;
-}
-
-static void *dn_socket_seq_start(struct seq_file *seq, loff_t *pos)
-{
-	return *pos ? dn_socket_get_idx(seq, *pos - 1) : SEQ_START_TOKEN;
-}
-
-static void *dn_socket_seq_next(struct seq_file *seq, void *v, loff_t *pos)
-{
-	void *rc;
-
-	if (v == SEQ_START_TOKEN) {
-		rc = dn_socket_get_idx(seq, 0);
-		goto out;
-	}
-
-	rc = dn_socket_get_next(seq, v);
-	if (rc)
-		goto out;
-	read_unlock_bh(&dn_hash_lock);
-out:
-	++*pos;
-	return rc;
-}
-
-static void dn_socket_seq_stop(struct seq_file *seq, void *v)
-{
-	if (v && v != SEQ_START_TOKEN)
-		read_unlock_bh(&dn_hash_lock);
-}
-
-#define IS_NOT_PRINTABLE(x) ((x) < 32 || (x) > 126)
-
-static void dn_printable_object(struct sockaddr_dn *dn, unsigned char *buf)
-{
-	int i;
-
-	switch (le16_to_cpu(dn->sdn_objnamel)) {
-	case 0:
-		sprintf(buf, "%d", dn->sdn_objnum);
-		break;
-	default:
-		for (i = 0; i < le16_to_cpu(dn->sdn_objnamel); i++) {
-			buf[i] = dn->sdn_objname[i];
-			if (IS_NOT_PRINTABLE(buf[i]))
-				buf[i] = '.';
-		}
-		buf[i] = 0;
-	}
-}
-
-static char *dn_state2asc(unsigned char state)
-{
-	switch (state) {
-	case DN_O:
-		return "OPEN";
-	case DN_CR:
-		return "  CR";
-	case DN_DR:
-		return "  DR";
-	case DN_DRC:
-		return " DRC";
-	case DN_CC:
-		return "  CC";
-	case DN_CI:
-		return "  CI";
-	case DN_NR:
-		return "  NR";
-	case DN_NC:
-		return "  NC";
-	case DN_CD:
-		return "  CD";
-	case DN_RJ:
-		return "  RJ";
-	case DN_RUN:
-		return " RUN";
-	case DN_DI:
-		return "  DI";
-	case DN_DIC:
-		return " DIC";
-	case DN_DN:
-		return "  DN";
-	case DN_CL:
-		return "  CL";
-	case DN_CN:
-		return "  CN";
-	}
-
-	return "????";
-}
-
-static inline void dn_socket_format_entry(struct seq_file *seq, struct sock *sk)
-{
-	struct dn_scp *scp = DN_SK(sk);
-	char buf1[DN_ASCBUF_LEN];
-	char buf2[DN_ASCBUF_LEN];
-	char local_object[DN_MAXOBJL+3];
-	char remote_object[DN_MAXOBJL+3];
-
-	dn_printable_object(&scp->addr, local_object);
-	dn_printable_object(&scp->peer, remote_object);
-
-	seq_printf(seq,
-		   "%6s/%04X %04d:%04d %04d:%04d %01d %-16s "
-		   "%6s/%04X %04d:%04d %04d:%04d %01d %-16s %4s %s\n",
-		   dn_addr2asc(le16_to_cpu(dn_saddr2dn(&scp->addr)), buf1),
-		   scp->addrloc,
-		   scp->numdat,
-		   scp->numoth,
-		   scp->ackxmt_dat,
-		   scp->ackxmt_oth,
-		   scp->flowloc_sw,
-		   local_object,
-		   dn_addr2asc(le16_to_cpu(dn_saddr2dn(&scp->peer)), buf2),
-		   scp->addrrem,
-		   scp->numdat_rcv,
-		   scp->numoth_rcv,
-		   scp->ackrcv_dat,
-		   scp->ackrcv_oth,
-		   scp->flowrem_sw,
-		   remote_object,
-		   dn_state2asc(scp->state),
-		   ((scp->accept_mode == ACC_IMMED) ? "IMMED" : "DEFER"));
-}
-
-static int dn_socket_seq_show(struct seq_file *seq, void *v)
-{
-	if (v == SEQ_START_TOKEN) {
-		seq_puts(seq, "Local                                              Remote\n");
-	} else {
-		dn_socket_format_entry(seq, v);
-	}
-	return 0;
-}
-
-static const struct seq_operations dn_socket_seq_ops = {
-	.start	= dn_socket_seq_start,
-	.next	= dn_socket_seq_next,
-	.stop	= dn_socket_seq_stop,
-	.show	= dn_socket_seq_show,
-};
-#endif
-
-static const struct net_proto_family	dn_family_ops = {
-	.family =	AF_DECnet,
-	.create =	dn_create,
-	.owner	=	THIS_MODULE,
-};
-
-static const struct proto_ops dn_proto_ops = {
-	.family =	AF_DECnet,
-	.owner =	THIS_MODULE,
-	.release =	dn_release,
-	.bind =		dn_bind,
-	.connect =	dn_connect,
-	.socketpair =	sock_no_socketpair,
-	.accept =	dn_accept,
-	.getname =	dn_getname,
-	.poll =		dn_poll,
-	.ioctl =	dn_ioctl,
-	.listen =	dn_listen,
-	.shutdown =	dn_shutdown,
-	.setsockopt =	dn_setsockopt,
-	.getsockopt =	dn_getsockopt,
-	.sendmsg =	dn_sendmsg,
-	.recvmsg =	dn_recvmsg,
-	.mmap =		sock_no_mmap,
-	.sendpage =	sock_no_sendpage,
-};
-
-MODULE_DESCRIPTION("The Linux DECnet Network Protocol");
-MODULE_AUTHOR("Linux DECnet Project Team");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS_NETPROTO(PF_DECnet);
-
-static const char banner[] __initconst = KERN_INFO
-"NET4: DECnet for Linux: V.2.5.68s (C) 1995-2003 Linux DECnet Project Team\n";
-
-static int __init decnet_init(void)
-{
-	int rc;
-
-	printk(banner);
-
-	rc = proto_register(&dn_proto, 1);
-	if (rc != 0)
-		goto out;
-
-	dn_neigh_init();
-	dn_dev_init();
-	dn_route_init();
-	dn_fib_init();
-
-	sock_register(&dn_family_ops);
-	dev_add_pack(&dn_dix_packet_type);
-	register_netdevice_notifier(&dn_dev_notifier);
-
-	proc_create_seq_private("decnet", 0444, init_net.proc_net,
-			&dn_socket_seq_ops, sizeof(struct dn_iter_state),
-			NULL);
-	dn_register_sysctl();
-out:
-	return rc;
-
-}
-module_init(decnet_init);
-
-/*
- * Prevent DECnet module unloading until its fixed properly.
- * Requires an audit of the code to check for memory leaks and
- * initialisation problems etc.
- */
-#if 0
-static void __exit decnet_exit(void)
-{
-	sock_unregister(AF_DECnet);
-	rtnl_unregister_all(PF_DECnet);
-	dev_remove_pack(&dn_dix_packet_type);
-
-	dn_unregister_sysctl();
-
-	unregister_netdevice_notifier(&dn_dev_notifier);
-
-	dn_route_cleanup();
-	dn_dev_cleanup();
-	dn_neigh_cleanup();
-	dn_fib_cleanup();
-
-	remove_proc_entry("decnet", init_net.proc_net);
-
-	proto_unregister(&dn_proto);
-
-	rcu_barrier(); /* Wait for completion of call_rcu()'s */
-}
-module_exit(decnet_exit);
-#endif
diff --git a/net/decnet/dn_dev.c b/net/decnet/dn_dev.c
deleted file mode 100644
index a09ba642b5e7..000000000000
--- a/net/decnet/dn_dev.c
+++ /dev/null
@@ -1,1433 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * 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 <linux/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 (offsetof(struct ifreq, ifr_ifru) + 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 *, 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
-	},
-	{ }
-	},
-};
-
-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 *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;
-		if (copy_to_user(arg, ifr, DN_IFREQ_SIZE))
-			ret = -EFAULT;
-		break;
-
-	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;
-}
-
-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);
-
-	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);
-
-	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 netlink_ext_ack *extack)
-{
-	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_deprecated(nlh, sizeof(*ifm), tb, IFA_MAX,
-				     dn_ifa_policy, extack);
-	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 netlink_ext_ack *extack)
-{
-	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_deprecated(nlh, sizeof(*ifm), tb, IFA_MAX,
-				     dn_ifa_policy, extack);
-	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_strscpy(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 = 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 = container_of(dn_db->router, struct dn_neigh, n);
-		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 = 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 = container_of(dn_db->router, struct dn_neigh, n);
-	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 = 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(struct timer_list *t)
-{
-	struct dn_dev *dn_db = from_timer(dn_db, t, timer);
-	struct net_device *dev;
-	struct dn_ifaddr *ifa;
-
-	rcu_read_lock();
-	dev = dn_db->dev;
-	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.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;
-	timer_setup(&dn_db->timer, dn_dev_timer_func, 0);
-
-	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,
-				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,
-};
-#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_module(THIS_MODULE, PF_DECnet, RTM_NEWADDR,
-			     dn_nl_newaddr, NULL, 0);
-	rtnl_register_module(THIS_MODULE, PF_DECnet, RTM_DELADDR,
-			     dn_nl_deladdr, NULL, 0);
-	rtnl_register_module(THIS_MODULE, PF_DECnet, RTM_GETADDR,
-			     NULL, dn_nl_dump_ifaddr, 0);
-
-	proc_create_seq("decnet_dev", 0444, init_net.proc_net, &dn_dev_seq_ops);
-
-#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();
-}
diff --git a/net/decnet/dn_fib.c b/net/decnet/dn_fib.c
deleted file mode 100644
index 269c029ad74f..000000000000
--- a/net/decnet/dn_fib.c
+++ /dev/null
@@ -1,798 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * 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 Routing Forwarding Information Base (Glue/Info List)
- *
- * Author:      Steve Whitehouse <SteveW@ACM.org>
- *
- *
- * Changes:
- *              Alexey Kuznetsov : SMP locking changes
- *              Steve Whitehouse : Rewrote it... Well to be more correct, I
- *                                 copied most of it from the ipv4 fib code.
- *              Steve Whitehouse : Updated it in style and fixed a few bugs
- *                                 which were fixed in the ipv4 code since
- *                                 this code was copied from it.
- *
- */
-#include <linux/string.h>
-#include <linux/net.h>
-#include <linux/socket.h>
-#include <linux/slab.h>
-#include <linux/sockios.h>
-#include <linux/init.h>
-#include <linux/skbuff.h>
-#include <linux/netlink.h>
-#include <linux/rtnetlink.h>
-#include <linux/proc_fs.h>
-#include <linux/netdevice.h>
-#include <linux/timer.h>
-#include <linux/spinlock.h>
-#include <linux/atomic.h>
-#include <linux/uaccess.h>
-#include <net/neighbour.h>
-#include <net/dst.h>
-#include <net/flow.h>
-#include <net/fib_rules.h>
-#include <net/dn.h>
-#include <net/dn_route.h>
-#include <net/dn_fib.h>
-#include <net/dn_neigh.h>
-#include <net/dn_dev.h>
-#include <net/rtnh.h>
-
-#define RT_MIN_TABLE 1
-
-#define for_fib_info() { struct dn_fib_info *fi;\
-	for(fi = dn_fib_info_list; fi; fi = fi->fib_next)
-#define endfor_fib_info() }
-
-#define for_nexthops(fi) { int nhsel; const struct dn_fib_nh *nh;\
-	for(nhsel = 0, nh = (fi)->fib_nh; nhsel < (fi)->fib_nhs; nh++, nhsel++)
-
-#define change_nexthops(fi) { int nhsel; struct dn_fib_nh *nh;\
-	for(nhsel = 0, nh = (struct dn_fib_nh *)((fi)->fib_nh); nhsel < (fi)->fib_nhs; nh++, nhsel++)
-
-#define endfor_nexthops(fi) }
-
-static DEFINE_SPINLOCK(dn_fib_multipath_lock);
-static struct dn_fib_info *dn_fib_info_list;
-static DEFINE_SPINLOCK(dn_fib_info_lock);
-
-static struct
-{
-	int error;
-	u8 scope;
-} dn_fib_props[RTN_MAX+1] = {
-	[RTN_UNSPEC] =      { .error = 0,       .scope = RT_SCOPE_NOWHERE },
-	[RTN_UNICAST] =     { .error = 0,       .scope = RT_SCOPE_UNIVERSE },
-	[RTN_LOCAL] =       { .error = 0,       .scope = RT_SCOPE_HOST },
-	[RTN_BROADCAST] =   { .error = -EINVAL, .scope = RT_SCOPE_NOWHERE },
-	[RTN_ANYCAST] =     { .error = -EINVAL, .scope = RT_SCOPE_NOWHERE },
-	[RTN_MULTICAST] =   { .error = -EINVAL, .scope = RT_SCOPE_NOWHERE },
-	[RTN_BLACKHOLE] =   { .error = -EINVAL, .scope = RT_SCOPE_UNIVERSE },
-	[RTN_UNREACHABLE] = { .error = -EHOSTUNREACH, .scope = RT_SCOPE_UNIVERSE },
-	[RTN_PROHIBIT] =    { .error = -EACCES, .scope = RT_SCOPE_UNIVERSE },
-	[RTN_THROW] =       { .error = -EAGAIN, .scope = RT_SCOPE_UNIVERSE },
-	[RTN_NAT] =         { .error = 0,       .scope = RT_SCOPE_NOWHERE },
-	[RTN_XRESOLVE] =    { .error = -EINVAL, .scope = RT_SCOPE_NOWHERE },
-};
-
-static int dn_fib_sync_down(__le16 local, struct net_device *dev, int force);
-static int dn_fib_sync_up(struct net_device *dev);
-
-void dn_fib_free_info(struct dn_fib_info *fi)
-{
-	if (fi->fib_dead == 0) {
-		printk(KERN_DEBUG "DECnet: BUG! Attempt to free alive dn_fib_info\n");
-		return;
-	}
-
-	change_nexthops(fi) {
-		dev_put(nh->nh_dev);
-		nh->nh_dev = NULL;
-	} endfor_nexthops(fi);
-	kfree(fi);
-}
-
-void dn_fib_release_info(struct dn_fib_info *fi)
-{
-	spin_lock(&dn_fib_info_lock);
-	if (fi && refcount_dec_and_test(&fi->fib_treeref)) {
-		if (fi->fib_next)
-			fi->fib_next->fib_prev = fi->fib_prev;
-		if (fi->fib_prev)
-			fi->fib_prev->fib_next = fi->fib_next;
-		if (fi == dn_fib_info_list)
-			dn_fib_info_list = fi->fib_next;
-		fi->fib_dead = 1;
-		dn_fib_info_put(fi);
-	}
-	spin_unlock(&dn_fib_info_lock);
-}
-
-static inline int dn_fib_nh_comp(const struct dn_fib_info *fi, const struct dn_fib_info *ofi)
-{
-	const struct dn_fib_nh *onh = ofi->fib_nh;
-
-	for_nexthops(fi) {
-		if (nh->nh_oif != onh->nh_oif ||
-			nh->nh_gw != onh->nh_gw ||
-			nh->nh_scope != onh->nh_scope ||
-			nh->nh_weight != onh->nh_weight ||
-			((nh->nh_flags^onh->nh_flags)&~RTNH_F_DEAD))
-				return -1;
-		onh++;
-	} endfor_nexthops(fi);
-	return 0;
-}
-
-static inline struct dn_fib_info *dn_fib_find_info(const struct dn_fib_info *nfi)
-{
-	for_fib_info() {
-		if (fi->fib_nhs != nfi->fib_nhs)
-			continue;
-		if (nfi->fib_protocol == fi->fib_protocol &&
-			nfi->fib_prefsrc == fi->fib_prefsrc &&
-			nfi->fib_priority == fi->fib_priority &&
-			memcmp(nfi->fib_metrics, fi->fib_metrics, sizeof(fi->fib_metrics)) == 0 &&
-			((nfi->fib_flags^fi->fib_flags)&~RTNH_F_DEAD) == 0 &&
-			(nfi->fib_nhs == 0 || dn_fib_nh_comp(fi, nfi) == 0))
-				return fi;
-	} endfor_fib_info();
-	return NULL;
-}
-
-static int dn_fib_count_nhs(const struct nlattr *attr)
-{
-	struct rtnexthop *nhp = nla_data(attr);
-	int nhs = 0, nhlen = nla_len(attr);
-
-	while (rtnh_ok(nhp, nhlen)) {
-		nhs++;
-		nhp = rtnh_next(nhp, &nhlen);
-	}
-
-	/* leftover implies invalid nexthop configuration, discard it */
-	return nhlen > 0 ? 0 : nhs;
-}
-
-static int dn_fib_get_nhs(struct dn_fib_info *fi, const struct nlattr *attr,
-			  const struct rtmsg *r)
-{
-	struct rtnexthop *nhp = nla_data(attr);
-	int nhlen = nla_len(attr);
-
-	change_nexthops(fi) {
-		int attrlen;
-
-		if (!rtnh_ok(nhp, nhlen))
-			return -EINVAL;
-
-		nh->nh_flags  = (r->rtm_flags&~0xFF) | nhp->rtnh_flags;
-		nh->nh_oif    = nhp->rtnh_ifindex;
-		nh->nh_weight = nhp->rtnh_hops + 1;
-
-		attrlen = rtnh_attrlen(nhp);
-		if (attrlen > 0) {
-			struct nlattr *gw_attr;
-
-			gw_attr = nla_find((struct nlattr *) (nhp + 1), attrlen, RTA_GATEWAY);
-			nh->nh_gw = gw_attr ? nla_get_le16(gw_attr) : 0;
-		}
-
-		nhp = rtnh_next(nhp, &nhlen);
-	} endfor_nexthops(fi);
-
-	return 0;
-}
-
-
-static int dn_fib_check_nh(const struct rtmsg *r, struct dn_fib_info *fi, struct dn_fib_nh *nh)
-{
-	int err;
-
-	if (nh->nh_gw) {
-		struct flowidn fld;
-		struct dn_fib_res res;
-
-		if (nh->nh_flags&RTNH_F_ONLINK) {
-			struct net_device *dev;
-
-			if (r->rtm_scope >= RT_SCOPE_LINK)
-				return -EINVAL;
-			if (dnet_addr_type(nh->nh_gw) != RTN_UNICAST)
-				return -EINVAL;
-			if ((dev = __dev_get_by_index(&init_net, nh->nh_oif)) == NULL)
-				return -ENODEV;
-			if (!(dev->flags&IFF_UP))
-				return -ENETDOWN;
-			nh->nh_dev = dev;
-			dev_hold(dev);
-			nh->nh_scope = RT_SCOPE_LINK;
-			return 0;
-		}
-
-		memset(&fld, 0, sizeof(fld));
-		fld.daddr = nh->nh_gw;
-		fld.flowidn_oif = nh->nh_oif;
-		fld.flowidn_scope = r->rtm_scope + 1;
-
-		if (fld.flowidn_scope < RT_SCOPE_LINK)
-			fld.flowidn_scope = RT_SCOPE_LINK;
-
-		if ((err = dn_fib_lookup(&fld, &res)) != 0)
-			return err;
-
-		err = -EINVAL;
-		if (res.type != RTN_UNICAST && res.type != RTN_LOCAL)
-			goto out;
-		nh->nh_scope = res.scope;
-		nh->nh_oif = DN_FIB_RES_OIF(res);
-		nh->nh_dev = DN_FIB_RES_DEV(res);
-		if (nh->nh_dev == NULL)
-			goto out;
-		dev_hold(nh->nh_dev);
-		err = -ENETDOWN;
-		if (!(nh->nh_dev->flags & IFF_UP))
-			goto out;
-		err = 0;
-out:
-		dn_fib_res_put(&res);
-		return err;
-	} else {
-		struct net_device *dev;
-
-		if (nh->nh_flags&(RTNH_F_PERVASIVE|RTNH_F_ONLINK))
-			return -EINVAL;
-
-		dev = __dev_get_by_index(&init_net, nh->nh_oif);
-		if (dev == NULL || dev->dn_ptr == NULL)
-			return -ENODEV;
-		if (!(dev->flags&IFF_UP))
-			return -ENETDOWN;
-		nh->nh_dev = dev;
-		dev_hold(nh->nh_dev);
-		nh->nh_scope = RT_SCOPE_HOST;
-	}
-
-	return 0;
-}
-
-
-struct dn_fib_info *dn_fib_create_info(const struct rtmsg *r, struct nlattr *attrs[],
-				       const struct nlmsghdr *nlh, int *errp)
-{
-	int err;
-	struct dn_fib_info *fi = NULL;
-	struct dn_fib_info *ofi;
-	int nhs = 1;
-
-	if (r->rtm_type > RTN_MAX)
-		goto err_inval;
-
-	if (dn_fib_props[r->rtm_type].scope > r->rtm_scope)
-		goto err_inval;
-
-	if (attrs[RTA_MULTIPATH] &&
-	    (nhs = dn_fib_count_nhs(attrs[RTA_MULTIPATH])) == 0)
-		goto err_inval;
-
-	fi = kzalloc(struct_size(fi, fib_nh, nhs), GFP_KERNEL);
-	err = -ENOBUFS;
-	if (fi == NULL)
-		goto failure;
-
-	fi->fib_protocol = r->rtm_protocol;
-	fi->fib_nhs = nhs;
-	fi->fib_flags = r->rtm_flags;
-
-	if (attrs[RTA_PRIORITY])
-		fi->fib_priority = nla_get_u32(attrs[RTA_PRIORITY]);
-
-	if (attrs[RTA_METRICS]) {
-		struct nlattr *attr;
-		int rem;
-
-		nla_for_each_nested(attr, attrs[RTA_METRICS], rem) {
-			int type = nla_type(attr);
-
-			if (type) {
-				if (type > RTAX_MAX || type == RTAX_CC_ALGO ||
-				    nla_len(attr) < 4)
-					goto err_inval;
-
-				fi->fib_metrics[type-1] = nla_get_u32(attr);
-			}
-		}
-	}
-
-	if (attrs[RTA_PREFSRC])
-		fi->fib_prefsrc = nla_get_le16(attrs[RTA_PREFSRC]);
-
-	if (attrs[RTA_MULTIPATH]) {
-		if ((err = dn_fib_get_nhs(fi, attrs[RTA_MULTIPATH], r)) != 0)
-			goto failure;
-
-		if (attrs[RTA_OIF] &&
-		    fi->fib_nh->nh_oif != nla_get_u32(attrs[RTA_OIF]))
-			goto err_inval;
-
-		if (attrs[RTA_GATEWAY] &&
-		    fi->fib_nh->nh_gw != nla_get_le16(attrs[RTA_GATEWAY]))
-			goto err_inval;
-	} else {
-		struct dn_fib_nh *nh = fi->fib_nh;
-
-		if (attrs[RTA_OIF])
-			nh->nh_oif = nla_get_u32(attrs[RTA_OIF]);
-
-		if (attrs[RTA_GATEWAY])
-			nh->nh_gw = nla_get_le16(attrs[RTA_GATEWAY]);
-
-		nh->nh_flags = r->rtm_flags;
-		nh->nh_weight = 1;
-	}
-
-	if (r->rtm_type == RTN_NAT) {
-		if (!attrs[RTA_GATEWAY] || nhs != 1 || attrs[RTA_OIF])
-			goto err_inval;
-
-		fi->fib_nh->nh_gw = nla_get_le16(attrs[RTA_GATEWAY]);
-		goto link_it;
-	}
-
-	if (dn_fib_props[r->rtm_type].error) {
-		if (attrs[RTA_GATEWAY] || attrs[RTA_OIF] || attrs[RTA_MULTIPATH])
-			goto err_inval;
-
-		goto link_it;
-	}
-
-	if (r->rtm_scope > RT_SCOPE_HOST)
-		goto err_inval;
-
-	if (r->rtm_scope == RT_SCOPE_HOST) {
-		struct dn_fib_nh *nh = fi->fib_nh;
-
-		/* Local address is added */
-		if (nhs != 1 || nh->nh_gw)
-			goto err_inval;
-		nh->nh_scope = RT_SCOPE_NOWHERE;
-		nh->nh_dev = dev_get_by_index(&init_net, fi->fib_nh->nh_oif);
-		err = -ENODEV;
-		if (nh->nh_dev == NULL)
-			goto failure;
-	} else {
-		change_nexthops(fi) {
-			if ((err = dn_fib_check_nh(r, fi, nh)) != 0)
-				goto failure;
-		} endfor_nexthops(fi)
-	}
-
-	if (fi->fib_prefsrc) {
-		if (r->rtm_type != RTN_LOCAL || !attrs[RTA_DST] ||
-		    fi->fib_prefsrc != nla_get_le16(attrs[RTA_DST]))
-			if (dnet_addr_type(fi->fib_prefsrc) != RTN_LOCAL)
-				goto err_inval;
-	}
-
-link_it:
-	if ((ofi = dn_fib_find_info(fi)) != NULL) {
-		fi->fib_dead = 1;
-		dn_fib_free_info(fi);
-		refcount_inc(&ofi->fib_treeref);
-		return ofi;
-	}
-
-	refcount_set(&fi->fib_treeref, 1);
-	refcount_set(&fi->fib_clntref, 1);
-	spin_lock(&dn_fib_info_lock);
-	fi->fib_next = dn_fib_info_list;
-	fi->fib_prev = NULL;
-	if (dn_fib_info_list)
-		dn_fib_info_list->fib_prev = fi;
-	dn_fib_info_list = fi;
-	spin_unlock(&dn_fib_info_lock);
-	return fi;
-
-err_inval:
-	err = -EINVAL;
-
-failure:
-	*errp = err;
-	if (fi) {
-		fi->fib_dead = 1;
-		dn_fib_free_info(fi);
-	}
-
-	return NULL;
-}
-
-int dn_fib_semantic_match(int type, struct dn_fib_info *fi, const struct flowidn *fld, struct dn_fib_res *res)
-{
-	int err = dn_fib_props[type].error;
-
-	if (err == 0) {
-		if (fi->fib_flags & RTNH_F_DEAD)
-			return 1;
-
-		res->fi = fi;
-
-		switch (type) {
-		case RTN_NAT:
-			DN_FIB_RES_RESET(*res);
-			refcount_inc(&fi->fib_clntref);
-			return 0;
-		case RTN_UNICAST:
-		case RTN_LOCAL:
-			for_nexthops(fi) {
-				if (nh->nh_flags & RTNH_F_DEAD)
-					continue;
-				if (!fld->flowidn_oif ||
-				    fld->flowidn_oif == nh->nh_oif)
-					break;
-			}
-			if (nhsel < fi->fib_nhs) {
-				res->nh_sel = nhsel;
-				refcount_inc(&fi->fib_clntref);
-				return 0;
-			}
-			endfor_nexthops(fi);
-			res->fi = NULL;
-			return 1;
-		default:
-			net_err_ratelimited("DECnet: impossible routing event : dn_fib_semantic_match type=%d\n",
-					    type);
-			res->fi = NULL;
-			return -EINVAL;
-		}
-	}
-	return err;
-}
-
-void dn_fib_select_multipath(const struct flowidn *fld, struct dn_fib_res *res)
-{
-	struct dn_fib_info *fi = res->fi;
-	int w;
-
-	spin_lock_bh(&dn_fib_multipath_lock);
-	if (fi->fib_power <= 0) {
-		int power = 0;
-		change_nexthops(fi) {
-			if (!(nh->nh_flags&RTNH_F_DEAD)) {
-				power += nh->nh_weight;
-				nh->nh_power = nh->nh_weight;
-			}
-		} endfor_nexthops(fi);
-		fi->fib_power = power;
-		if (power < 0) {
-			spin_unlock_bh(&dn_fib_multipath_lock);
-			res->nh_sel = 0;
-			return;
-		}
-	}
-
-	w = jiffies % fi->fib_power;
-
-	change_nexthops(fi) {
-		if (!(nh->nh_flags&RTNH_F_DEAD) && nh->nh_power) {
-			if ((w -= nh->nh_power) <= 0) {
-				nh->nh_power--;
-				fi->fib_power--;
-				res->nh_sel = nhsel;
-				spin_unlock_bh(&dn_fib_multipath_lock);
-				return;
-			}
-		}
-	} endfor_nexthops(fi);
-	res->nh_sel = 0;
-	spin_unlock_bh(&dn_fib_multipath_lock);
-}
-
-static inline u32 rtm_get_table(struct nlattr *attrs[], u8 table)
-{
-	if (attrs[RTA_TABLE])
-		table = nla_get_u32(attrs[RTA_TABLE]);
-
-	return table;
-}
-
-static int dn_fib_rtm_delroute(struct sk_buff *skb, struct nlmsghdr *nlh,
-			       struct netlink_ext_ack *extack)
-{
-	struct net *net = sock_net(skb->sk);
-	struct dn_fib_table *tb;
-	struct rtmsg *r = nlmsg_data(nlh);
-	struct nlattr *attrs[RTA_MAX+1];
-	int err;
-
-	if (!netlink_capable(skb, CAP_NET_ADMIN))
-		return -EPERM;
-
-	if (!net_eq(net, &init_net))
-		return -EINVAL;
-
-	err = nlmsg_parse_deprecated(nlh, sizeof(*r), attrs, RTA_MAX,
-				     rtm_dn_policy, extack);
-	if (err < 0)
-		return err;
-
-	tb = dn_fib_get_table(rtm_get_table(attrs, r->rtm_table), 0);
-	if (!tb)
-		return -ESRCH;
-
-	return tb->delete(tb, r, attrs, nlh, &NETLINK_CB(skb));
-}
-
-static int dn_fib_rtm_newroute(struct sk_buff *skb, struct nlmsghdr *nlh,
-			       struct netlink_ext_ack *extack)
-{
-	struct net *net = sock_net(skb->sk);
-	struct dn_fib_table *tb;
-	struct rtmsg *r = nlmsg_data(nlh);
-	struct nlattr *attrs[RTA_MAX+1];
-	int err;
-
-	if (!netlink_capable(skb, CAP_NET_ADMIN))
-		return -EPERM;
-
-	if (!net_eq(net, &init_net))
-		return -EINVAL;
-
-	err = nlmsg_parse_deprecated(nlh, sizeof(*r), attrs, RTA_MAX,
-				     rtm_dn_policy, extack);
-	if (err < 0)
-		return err;
-
-	tb = dn_fib_get_table(rtm_get_table(attrs, r->rtm_table), 1);
-	if (!tb)
-		return -ENOBUFS;
-
-	return tb->insert(tb, r, attrs, nlh, &NETLINK_CB(skb));
-}
-
-static void fib_magic(int cmd, int type, __le16 dst, int dst_len, struct dn_ifaddr *ifa)
-{
-	struct dn_fib_table *tb;
-	struct {
-		struct nlmsghdr nlh;
-		struct rtmsg rtm;
-	} req;
-	struct {
-		struct nlattr hdr;
-		__le16 dst;
-	} dst_attr = {
-		.dst = dst,
-	};
-	struct {
-		struct nlattr hdr;
-		__le16 prefsrc;
-	} prefsrc_attr = {
-		.prefsrc = ifa->ifa_local,
-	};
-	struct {
-		struct nlattr hdr;
-		u32 oif;
-	} oif_attr = {
-		.oif = ifa->ifa_dev->dev->ifindex,
-	};
-	struct nlattr *attrs[RTA_MAX+1] = {
-		[RTA_DST] = (struct nlattr *) &dst_attr,
-		[RTA_PREFSRC] = (struct nlattr * ) &prefsrc_attr,
-		[RTA_OIF] = (struct nlattr *) &oif_attr,
-	};
-
-	memset(&req.rtm, 0, sizeof(req.rtm));
-
-	if (type == RTN_UNICAST)
-		tb = dn_fib_get_table(RT_MIN_TABLE, 1);
-	else
-		tb = dn_fib_get_table(RT_TABLE_LOCAL, 1);
-
-	if (tb == NULL)
-		return;
-
-	req.nlh.nlmsg_len = sizeof(req);
-	req.nlh.nlmsg_type = cmd;
-	req.nlh.nlmsg_flags = NLM_F_REQUEST|NLM_F_CREATE|NLM_F_APPEND;
-	req.nlh.nlmsg_pid = 0;
-	req.nlh.nlmsg_seq = 0;
-
-	req.rtm.rtm_dst_len = dst_len;
-	req.rtm.rtm_table = tb->n;
-	req.rtm.rtm_protocol = RTPROT_KERNEL;
-	req.rtm.rtm_scope = (type != RTN_LOCAL ? RT_SCOPE_LINK : RT_SCOPE_HOST);
-	req.rtm.rtm_type = type;
-
-	if (cmd == RTM_NEWROUTE)
-		tb->insert(tb, &req.rtm, attrs, &req.nlh, NULL);
-	else
-		tb->delete(tb, &req.rtm, attrs, &req.nlh, NULL);
-}
-
-static void dn_fib_add_ifaddr(struct dn_ifaddr *ifa)
-{
-
-	fib_magic(RTM_NEWROUTE, RTN_LOCAL, ifa->ifa_local, 16, ifa);
-
-#if 0
-	if (!(dev->flags&IFF_UP))
-		return;
-	/* In the future, we will want to add default routes here */
-
-#endif
-}
-
-static void dn_fib_del_ifaddr(struct dn_ifaddr *ifa)
-{
-	int found_it = 0;
-	struct net_device *dev;
-	struct dn_dev *dn_db;
-	struct dn_ifaddr *ifa2;
-
-	ASSERT_RTNL();
-
-	/* Scan device list */
-	rcu_read_lock();
-	for_each_netdev_rcu(&init_net, dev) {
-		dn_db = rcu_dereference(dev->dn_ptr);
-		if (dn_db == NULL)
-			continue;
-		for (ifa2 = rcu_dereference(dn_db->ifa_list);
-		     ifa2 != NULL;
-		     ifa2 = rcu_dereference(ifa2->ifa_next)) {
-			if (ifa2->ifa_local == ifa->ifa_local) {
-				found_it = 1;
-				break;
-			}
-		}
-	}
-	rcu_read_unlock();
-
-	if (found_it == 0) {
-		fib_magic(RTM_DELROUTE, RTN_LOCAL, ifa->ifa_local, 16, ifa);
-
-		if (dnet_addr_type(ifa->ifa_local) != RTN_LOCAL) {
-			if (dn_fib_sync_down(ifa->ifa_local, NULL, 0))
-				dn_fib_flush();
-		}
-	}
-}
-
-static void dn_fib_disable_addr(struct net_device *dev, int force)
-{
-	if (dn_fib_sync_down(0, dev, force))
-		dn_fib_flush();
-	dn_rt_cache_flush(0);
-	neigh_ifdown(&dn_neigh_table, dev);
-}
-
-static int dn_fib_dnaddr_event(struct notifier_block *this, unsigned long event, void *ptr)
-{
-	struct dn_ifaddr *ifa = (struct dn_ifaddr *)ptr;
-
-	switch (event) {
-	case NETDEV_UP:
-		dn_fib_add_ifaddr(ifa);
-		dn_fib_sync_up(ifa->ifa_dev->dev);
-		dn_rt_cache_flush(-1);
-		break;
-	case NETDEV_DOWN:
-		dn_fib_del_ifaddr(ifa);
-		if (ifa->ifa_dev && ifa->ifa_dev->ifa_list == NULL) {
-			dn_fib_disable_addr(ifa->ifa_dev->dev, 1);
-		} else {
-			dn_rt_cache_flush(-1);
-		}
-		break;
-	}
-	return NOTIFY_DONE;
-}
-
-static int dn_fib_sync_down(__le16 local, struct net_device *dev, int force)
-{
-	int ret = 0;
-	int scope = RT_SCOPE_NOWHERE;
-
-	if (force)
-		scope = -1;
-
-	for_fib_info() {
-		/*
-		 * This makes no sense for DECnet.... we will almost
-		 * certainly have more than one local address the same
-		 * over all our interfaces. It needs thinking about
-		 * some more.
-		 */
-		if (local && fi->fib_prefsrc == local) {
-			fi->fib_flags |= RTNH_F_DEAD;
-			ret++;
-		} else if (dev && fi->fib_nhs) {
-			int dead = 0;
-
-			change_nexthops(fi) {
-				if (nh->nh_flags&RTNH_F_DEAD)
-					dead++;
-				else if (nh->nh_dev == dev &&
-						nh->nh_scope != scope) {
-					spin_lock_bh(&dn_fib_multipath_lock);
-					nh->nh_flags |= RTNH_F_DEAD;
-					fi->fib_power -= nh->nh_power;
-					nh->nh_power = 0;
-					spin_unlock_bh(&dn_fib_multipath_lock);
-					dead++;
-				}
-			} endfor_nexthops(fi)
-			if (dead == fi->fib_nhs) {
-				fi->fib_flags |= RTNH_F_DEAD;
-				ret++;
-			}
-		}
-	} endfor_fib_info();
-	return ret;
-}
-
-
-static int dn_fib_sync_up(struct net_device *dev)
-{
-	int ret = 0;
-
-	if (!(dev->flags&IFF_UP))
-		return 0;
-
-	for_fib_info() {
-		int alive = 0;
-
-		change_nexthops(fi) {
-			if (!(nh->nh_flags&RTNH_F_DEAD)) {
-				alive++;
-				continue;
-			}
-			if (nh->nh_dev == NULL || !(nh->nh_dev->flags&IFF_UP))
-				continue;
-			if (nh->nh_dev != dev || dev->dn_ptr == NULL)
-				continue;
-			alive++;
-			spin_lock_bh(&dn_fib_multipath_lock);
-			nh->nh_power = 0;
-			nh->nh_flags &= ~RTNH_F_DEAD;
-			spin_unlock_bh(&dn_fib_multipath_lock);
-		} endfor_nexthops(fi);
-
-		if (alive > 0) {
-			fi->fib_flags &= ~RTNH_F_DEAD;
-			ret++;
-		}
-	} endfor_fib_info();
-	return ret;
-}
-
-static struct notifier_block dn_fib_dnaddr_notifier = {
-	.notifier_call = dn_fib_dnaddr_event,
-};
-
-void __exit dn_fib_cleanup(void)
-{
-	dn_fib_table_cleanup();
-	dn_fib_rules_cleanup();
-
-	unregister_dnaddr_notifier(&dn_fib_dnaddr_notifier);
-}
-
-
-void __init dn_fib_init(void)
-{
-	dn_fib_table_init();
-	dn_fib_rules_init();
-
-	register_dnaddr_notifier(&dn_fib_dnaddr_notifier);
-
-	rtnl_register_module(THIS_MODULE, PF_DECnet, RTM_NEWROUTE,
-			     dn_fib_rtm_newroute, NULL, 0);
-	rtnl_register_module(THIS_MODULE, PF_DECnet, RTM_DELROUTE,
-			     dn_fib_rtm_delroute, NULL, 0);
-}
diff --git a/net/decnet/dn_neigh.c b/net/decnet/dn_neigh.c
deleted file mode 100644
index 7c569bcc0aca..000000000000
--- a/net/decnet/dn_neigh.c
+++ /dev/null
@@ -1,607 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * 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 Neighbour Functions (Adjacency Database and
- *                                                        On-Ethernet Cache)
- *
- * Author:      Steve Whitehouse <SteveW@ACM.org>
- *
- *
- * Changes:
- *     Steve Whitehouse     : Fixed router listing routine
- *     Steve Whitehouse     : Added error_report functions
- *     Steve Whitehouse     : Added default router detection
- *     Steve Whitehouse     : Hop counts in outgoing messages
- *     Steve Whitehouse     : Fixed src/dst in outgoing messages so
- *                            forwarding now stands a good chance of
- *                            working.
- *     Steve Whitehouse     : Fixed neighbour states (for now anyway).
- *     Steve Whitehouse     : Made error_report functions dummies. This
- *                            is not the right place to return skbs.
- *     Steve Whitehouse     : Convert to seq_file
- *
- */
-
-#include <linux/net.h>
-#include <linux/module.h>
-#include <linux/socket.h>
-#include <linux/if_arp.h>
-#include <linux/slab.h>
-#include <linux/if_ether.h>
-#include <linux/init.h>
-#include <linux/proc_fs.h>
-#include <linux/string.h>
-#include <linux/netfilter_decnet.h>
-#include <linux/spinlock.h>
-#include <linux/seq_file.h>
-#include <linux/rcupdate.h>
-#include <linux/jhash.h>
-#include <linux/atomic.h>
-#include <net/net_namespace.h>
-#include <net/neighbour.h>
-#include <net/dst.h>
-#include <net/flow.h>
-#include <net/dn.h>
-#include <net/dn_dev.h>
-#include <net/dn_neigh.h>
-#include <net/dn_route.h>
-
-static int dn_neigh_construct(struct neighbour *);
-static void dn_neigh_error_report(struct neighbour *, struct sk_buff *);
-static int dn_neigh_output(struct neighbour *neigh, struct sk_buff *skb);
-
-/*
- * Operations for adding the link layer header.
- */
-static const struct neigh_ops dn_neigh_ops = {
-	.family =		AF_DECnet,
-	.error_report =		dn_neigh_error_report,
-	.output =		dn_neigh_output,
-	.connected_output =	dn_neigh_output,
-};
-
-static u32 dn_neigh_hash(const void *pkey,
-			 const struct net_device *dev,
-			 __u32 *hash_rnd)
-{
-	return jhash_2words(*(__u16 *)pkey, 0, hash_rnd[0]);
-}
-
-static bool dn_key_eq(const struct neighbour *neigh, const void *pkey)
-{
-	return neigh_key_eq16(neigh, pkey);
-}
-
-struct neigh_table dn_neigh_table = {
-	.family =			PF_DECnet,
-	.entry_size =			NEIGH_ENTRY_SIZE(sizeof(struct dn_neigh)),
-	.key_len =			sizeof(__le16),
-	.protocol =			cpu_to_be16(ETH_P_DNA_RT),
-	.hash =				dn_neigh_hash,
-	.key_eq =			dn_key_eq,
-	.constructor =			dn_neigh_construct,
-	.id =				"dn_neigh_cache",
-	.parms ={
-		.tbl =			&dn_neigh_table,
-		.reachable_time =	30 * HZ,
-		.data = {
-			[NEIGH_VAR_MCAST_PROBES] = 0,
-			[NEIGH_VAR_UCAST_PROBES] = 0,
-			[NEIGH_VAR_APP_PROBES] = 0,
-			[NEIGH_VAR_RETRANS_TIME] = 1 * HZ,
-			[NEIGH_VAR_BASE_REACHABLE_TIME] = 30 * HZ,
-			[NEIGH_VAR_DELAY_PROBE_TIME] = 5 * HZ,
-			[NEIGH_VAR_INTERVAL_PROBE_TIME_MS] = 5 * HZ,
-			[NEIGH_VAR_GC_STALETIME] = 60 * HZ,
-			[NEIGH_VAR_QUEUE_LEN_BYTES] = SK_WMEM_MAX,
-			[NEIGH_VAR_PROXY_QLEN] = 0,
-			[NEIGH_VAR_ANYCAST_DELAY] = 0,
-			[NEIGH_VAR_PROXY_DELAY] = 0,
-			[NEIGH_VAR_LOCKTIME] = 1 * HZ,
-		},
-	},
-	.gc_interval =			30 * HZ,
-	.gc_thresh1 =			128,
-	.gc_thresh2 =			512,
-	.gc_thresh3 =			1024,
-};
-
-static int dn_neigh_construct(struct neighbour *neigh)
-{
-	struct net_device *dev = neigh->dev;
-	struct dn_neigh *dn = container_of(neigh, struct dn_neigh, n);
-	struct dn_dev *dn_db;
-	struct neigh_parms *parms;
-
-	rcu_read_lock();
-	dn_db = rcu_dereference(dev->dn_ptr);
-	if (dn_db == NULL) {
-		rcu_read_unlock();
-		return -EINVAL;
-	}
-
-	parms = dn_db->neigh_parms;
-	if (!parms) {
-		rcu_read_unlock();
-		return -EINVAL;
-	}
-
-	__neigh_parms_put(neigh->parms);
-	neigh->parms = neigh_parms_clone(parms);
-	rcu_read_unlock();
-
-	neigh->ops = &dn_neigh_ops;
-	neigh->nud_state = NUD_NOARP;
-	neigh->output = neigh->ops->connected_output;
-
-	if ((dev->type == ARPHRD_IPGRE) || (dev->flags & IFF_POINTOPOINT))
-		memcpy(neigh->ha, dev->broadcast, dev->addr_len);
-	else if ((dev->type == ARPHRD_ETHER) || (dev->type == ARPHRD_LOOPBACK))
-		dn_dn2eth(neigh->ha, dn->addr);
-	else {
-		net_dbg_ratelimited("Trying to create neigh for hw %d\n",
-				    dev->type);
-		return -EINVAL;
-	}
-
-	/*
-	 * Make an estimate of the remote block size by assuming that its
-	 * two less then the device mtu, which it true for ethernet (and
-	 * other things which support long format headers) since there is
-	 * an extra length field (of 16 bits) which isn't part of the
-	 * ethernet headers and which the DECnet specs won't admit is part
-	 * of the DECnet routing headers either.
-	 *
-	 * If we over estimate here its no big deal, the NSP negotiations
-	 * will prevent us from sending packets which are too large for the
-	 * remote node to handle. In any case this figure is normally updated
-	 * by a hello message in most cases.
-	 */
-	dn->blksize = dev->mtu - 2;
-
-	return 0;
-}
-
-static void dn_neigh_error_report(struct neighbour *neigh, struct sk_buff *skb)
-{
-	printk(KERN_DEBUG "dn_neigh_error_report: called\n");
-	kfree_skb(skb);
-}
-
-static int dn_neigh_output(struct neighbour *neigh, struct sk_buff *skb)
-{
-	struct dst_entry *dst = skb_dst(skb);
-	struct dn_route *rt = (struct dn_route *)dst;
-	struct net_device *dev = neigh->dev;
-	char mac_addr[ETH_ALEN];
-	unsigned int seq;
-	int err;
-
-	dn_dn2eth(mac_addr, rt->rt_local_src);
-	do {
-		seq = read_seqbegin(&neigh->ha_lock);
-		err = dev_hard_header(skb, dev, ntohs(skb->protocol),
-				      neigh->ha, mac_addr, skb->len);
-	} while (read_seqretry(&neigh->ha_lock, seq));
-
-	if (err >= 0)
-		err = dev_queue_xmit(skb);
-	else {
-		kfree_skb(skb);
-		err = -EINVAL;
-	}
-	return err;
-}
-
-static int dn_neigh_output_packet(struct net *net, struct sock *sk, struct sk_buff *skb)
-{
-	struct dst_entry *dst = skb_dst(skb);
-	struct dn_route *rt = (struct dn_route *)dst;
-	struct neighbour *neigh = rt->n;
-
-	return neigh->output(neigh, skb);
-}
-
-/*
- * For talking to broadcast devices: Ethernet & PPP
- */
-static int dn_long_output(struct neighbour *neigh, struct sock *sk,
-			  struct sk_buff *skb)
-{
-	struct net_device *dev = neigh->dev;
-	int headroom = dev->hard_header_len + sizeof(struct dn_long_packet) + 3;
-	unsigned char *data;
-	struct dn_long_packet *lp;
-	struct dn_skb_cb *cb = DN_SKB_CB(skb);
-
-
-	if (skb_headroom(skb) < headroom) {
-		struct sk_buff *skb2 = skb_realloc_headroom(skb, headroom);
-		if (skb2 == NULL) {
-			net_crit_ratelimited("dn_long_output: no memory\n");
-			kfree_skb(skb);
-			return -ENOBUFS;
-		}
-		consume_skb(skb);
-		skb = skb2;
-		net_info_ratelimited("dn_long_output: Increasing headroom\n");
-	}
-
-	data = skb_push(skb, sizeof(struct dn_long_packet) + 3);
-	lp = (struct dn_long_packet *)(data+3);
-
-	*((__le16 *)data) = cpu_to_le16(skb->len - 2);
-	*(data + 2) = 1 | DN_RT_F_PF; /* Padding */
-
-	lp->msgflg   = DN_RT_PKT_LONG|(cb->rt_flags&(DN_RT_F_IE|DN_RT_F_RQR|DN_RT_F_RTS));
-	lp->d_area   = lp->d_subarea = 0;
-	dn_dn2eth(lp->d_id, cb->dst);
-	lp->s_area   = lp->s_subarea = 0;
-	dn_dn2eth(lp->s_id, cb->src);
-	lp->nl2      = 0;
-	lp->visit_ct = cb->hops & 0x3f;
-	lp->s_class  = 0;
-	lp->pt       = 0;
-
-	skb_reset_network_header(skb);
-
-	return NF_HOOK(NFPROTO_DECNET, NF_DN_POST_ROUTING,
-		       &init_net, sk, skb, NULL, neigh->dev,
-		       dn_neigh_output_packet);
-}
-
-/*
- * For talking to pointopoint and multidrop devices: DDCMP and X.25
- */
-static int dn_short_output(struct neighbour *neigh, struct sock *sk,
-			   struct sk_buff *skb)
-{
-	struct net_device *dev = neigh->dev;
-	int headroom = dev->hard_header_len + sizeof(struct dn_short_packet) + 2;
-	struct dn_short_packet *sp;
-	unsigned char *data;
-	struct dn_skb_cb *cb = DN_SKB_CB(skb);
-
-
-	if (skb_headroom(skb) < headroom) {
-		struct sk_buff *skb2 = skb_realloc_headroom(skb, headroom);
-		if (skb2 == NULL) {
-			net_crit_ratelimited("dn_short_output: no memory\n");
-			kfree_skb(skb);
-			return -ENOBUFS;
-		}
-		consume_skb(skb);
-		skb = skb2;
-		net_info_ratelimited("dn_short_output: Increasing headroom\n");
-	}
-
-	data = skb_push(skb, sizeof(struct dn_short_packet) + 2);
-	*((__le16 *)data) = cpu_to_le16(skb->len - 2);
-	sp = (struct dn_short_packet *)(data+2);
-
-	sp->msgflg     = DN_RT_PKT_SHORT|(cb->rt_flags&(DN_RT_F_RQR|DN_RT_F_RTS));
-	sp->dstnode    = cb->dst;
-	sp->srcnode    = cb->src;
-	sp->forward    = cb->hops & 0x3f;
-
-	skb_reset_network_header(skb);
-
-	return NF_HOOK(NFPROTO_DECNET, NF_DN_POST_ROUTING,
-		       &init_net, sk, skb, NULL, neigh->dev,
-		       dn_neigh_output_packet);
-}
-
-/*
- * For talking to DECnet phase III nodes
- * Phase 3 output is the same as short output, execpt that
- * it clears the area bits before transmission.
- */
-static int dn_phase3_output(struct neighbour *neigh, struct sock *sk,
-			    struct sk_buff *skb)
-{
-	struct net_device *dev = neigh->dev;
-	int headroom = dev->hard_header_len + sizeof(struct dn_short_packet) + 2;
-	struct dn_short_packet *sp;
-	unsigned char *data;
-	struct dn_skb_cb *cb = DN_SKB_CB(skb);
-
-	if (skb_headroom(skb) < headroom) {
-		struct sk_buff *skb2 = skb_realloc_headroom(skb, headroom);
-		if (skb2 == NULL) {
-			net_crit_ratelimited("dn_phase3_output: no memory\n");
-			kfree_skb(skb);
-			return -ENOBUFS;
-		}
-		consume_skb(skb);
-		skb = skb2;
-		net_info_ratelimited("dn_phase3_output: Increasing headroom\n");
-	}
-
-	data = skb_push(skb, sizeof(struct dn_short_packet) + 2);
-	*((__le16 *)data) = cpu_to_le16(skb->len - 2);
-	sp = (struct dn_short_packet *)(data + 2);
-
-	sp->msgflg   = DN_RT_PKT_SHORT|(cb->rt_flags&(DN_RT_F_RQR|DN_RT_F_RTS));
-	sp->dstnode  = cb->dst & cpu_to_le16(0x03ff);
-	sp->srcnode  = cb->src & cpu_to_le16(0x03ff);
-	sp->forward  = cb->hops & 0x3f;
-
-	skb_reset_network_header(skb);
-
-	return NF_HOOK(NFPROTO_DECNET, NF_DN_POST_ROUTING,
-		       &init_net, sk, skb, NULL, neigh->dev,
-		       dn_neigh_output_packet);
-}
-
-int dn_to_neigh_output(struct net *net, struct sock *sk, struct sk_buff *skb)
-{
-	struct dst_entry *dst = skb_dst(skb);
-	struct dn_route *rt = (struct dn_route *) dst;
-	struct neighbour *neigh = rt->n;
-	struct dn_neigh *dn = container_of(neigh, struct dn_neigh, n);
-	struct dn_dev *dn_db;
-	bool use_long;
-
-	rcu_read_lock();
-	dn_db = rcu_dereference(neigh->dev->dn_ptr);
-	if (dn_db == NULL) {
-		rcu_read_unlock();
-		return -EINVAL;
-	}
-	use_long = dn_db->use_long;
-	rcu_read_unlock();
-
-	if (dn->flags & DN_NDFLAG_P3)
-		return dn_phase3_output(neigh, sk, skb);
-	if (use_long)
-		return dn_long_output(neigh, sk, skb);
-	else
-		return dn_short_output(neigh, sk, skb);
-}
-
-/*
- * Unfortunately, the neighbour code uses the device in its hash
- * function, so we don't get any advantage from it. This function
- * basically does a neigh_lookup(), but without comparing the device
- * field. This is required for the On-Ethernet cache
- */
-
-/*
- * Pointopoint link receives a hello message
- */
-void dn_neigh_pointopoint_hello(struct sk_buff *skb)
-{
-	kfree_skb(skb);
-}
-
-/*
- * Ethernet router hello message received
- */
-int dn_neigh_router_hello(struct net *net, struct sock *sk, struct sk_buff *skb)
-{
-	struct rtnode_hello_message *msg = (struct rtnode_hello_message *)skb->data;
-
-	struct neighbour *neigh;
-	struct dn_neigh *dn;
-	struct dn_dev *dn_db;
-	__le16 src;
-
-	src = dn_eth2dn(msg->id);
-
-	neigh = __neigh_lookup(&dn_neigh_table, &src, skb->dev, 1);
-
-	dn = container_of(neigh, struct dn_neigh, n);
-
-	if (neigh) {
-		write_lock(&neigh->lock);
-
-		neigh->used = jiffies;
-		dn_db = rcu_dereference(neigh->dev->dn_ptr);
-
-		if (!(neigh->nud_state & NUD_PERMANENT)) {
-			neigh->updated = jiffies;
-
-			if (neigh->dev->type == ARPHRD_ETHER)
-				memcpy(neigh->ha, &eth_hdr(skb)->h_source, ETH_ALEN);
-
-			dn->blksize  = le16_to_cpu(msg->blksize);
-			dn->priority = msg->priority;
-
-			dn->flags &= ~DN_NDFLAG_P3;
-
-			switch (msg->iinfo & DN_RT_INFO_TYPE) {
-			case DN_RT_INFO_L1RT:
-				dn->flags &=~DN_NDFLAG_R2;
-				dn->flags |= DN_NDFLAG_R1;
-				break;
-			case DN_RT_INFO_L2RT:
-				dn->flags |= DN_NDFLAG_R2;
-			}
-		}
-
-		/* Only use routers in our area */
-		if ((le16_to_cpu(src)>>10) == (le16_to_cpu((decnet_address))>>10)) {
-			if (!dn_db->router) {
-				dn_db->router = neigh_clone(neigh);
-			} else {
-				if (msg->priority > container_of(dn_db->router,
-								 struct dn_neigh, n)->priority)
-					neigh_release(xchg(&dn_db->router, neigh_clone(neigh)));
-			}
-		}
-		write_unlock(&neigh->lock);
-		neigh_release(neigh);
-	}
-
-	kfree_skb(skb);
-	return 0;
-}
-
-/*
- * Endnode hello message received
- */
-int dn_neigh_endnode_hello(struct net *net, struct sock *sk, struct sk_buff *skb)
-{
-	struct endnode_hello_message *msg = (struct endnode_hello_message *)skb->data;
-	struct neighbour *neigh;
-	struct dn_neigh *dn;
-	__le16 src;
-
-	src = dn_eth2dn(msg->id);
-
-	neigh = __neigh_lookup(&dn_neigh_table, &src, skb->dev, 1);
-
-	dn = container_of(neigh, struct dn_neigh, n);
-
-	if (neigh) {
-		write_lock(&neigh->lock);
-
-		neigh->used = jiffies;
-
-		if (!(neigh->nud_state & NUD_PERMANENT)) {
-			neigh->updated = jiffies;
-
-			if (neigh->dev->type == ARPHRD_ETHER)
-				memcpy(neigh->ha, &eth_hdr(skb)->h_source, ETH_ALEN);
-			dn->flags   &= ~(DN_NDFLAG_R1 | DN_NDFLAG_R2);
-			dn->blksize  = le16_to_cpu(msg->blksize);
-			dn->priority = 0;
-		}
-
-		write_unlock(&neigh->lock);
-		neigh_release(neigh);
-	}
-
-	kfree_skb(skb);
-	return 0;
-}
-
-static char *dn_find_slot(char *base, int max, int priority)
-{
-	int i;
-	unsigned char *min = NULL;
-
-	base += 6; /* skip first id */
-
-	for(i = 0; i < max; i++) {
-		if (!min || (*base < *min))
-			min = base;
-		base += 7; /* find next priority */
-	}
-
-	if (!min)
-		return NULL;
-
-	return (*min < priority) ? (min - 6) : NULL;
-}
-
-struct elist_cb_state {
-	struct net_device *dev;
-	unsigned char *ptr;
-	unsigned char *rs;
-	int t, n;
-};
-
-static void neigh_elist_cb(struct neighbour *neigh, void *_info)
-{
-	struct elist_cb_state *s = _info;
-	struct dn_neigh *dn;
-
-	if (neigh->dev != s->dev)
-		return;
-
-	dn = container_of(neigh, struct dn_neigh, n);
-	if (!(dn->flags & (DN_NDFLAG_R1|DN_NDFLAG_R2)))
-		return;
-
-	if (s->t == s->n)
-		s->rs = dn_find_slot(s->ptr, s->n, dn->priority);
-	else
-		s->t++;
-	if (s->rs == NULL)
-		return;
-
-	dn_dn2eth(s->rs, dn->addr);
-	s->rs += 6;
-	*(s->rs) = neigh->nud_state & NUD_CONNECTED ? 0x80 : 0x0;
-	*(s->rs) |= dn->priority;
-	s->rs++;
-}
-
-int dn_neigh_elist(struct net_device *dev, unsigned char *ptr, int n)
-{
-	struct elist_cb_state state;
-
-	state.dev = dev;
-	state.t = 0;
-	state.n = n;
-	state.ptr = ptr;
-	state.rs = ptr;
-
-	neigh_for_each(&dn_neigh_table, neigh_elist_cb, &state);
-
-	return state.t;
-}
-
-
-#ifdef CONFIG_PROC_FS
-
-static inline void dn_neigh_format_entry(struct seq_file *seq,
-					 struct neighbour *n)
-{
-	struct dn_neigh *dn = container_of(n, struct dn_neigh, n);
-	char buf[DN_ASCBUF_LEN];
-
-	read_lock(&n->lock);
-	seq_printf(seq, "%-7s %s%s%s   %02x    %02d  %07ld %-8s\n",
-		   dn_addr2asc(le16_to_cpu(dn->addr), buf),
-		   (dn->flags&DN_NDFLAG_R1) ? "1" : "-",
-		   (dn->flags&DN_NDFLAG_R2) ? "2" : "-",
-		   (dn->flags&DN_NDFLAG_P3) ? "3" : "-",
-		   dn->n.nud_state,
-		   refcount_read(&dn->n.refcnt),
-		   dn->blksize,
-		   (dn->n.dev) ? dn->n.dev->name : "?");
-	read_unlock(&n->lock);
-}
-
-static int dn_neigh_seq_show(struct seq_file *seq, void *v)
-{
-	if (v == SEQ_START_TOKEN) {
-		seq_puts(seq, "Addr    Flags State Use Blksize Dev\n");
-	} else {
-		dn_neigh_format_entry(seq, v);
-	}
-
-	return 0;
-}
-
-static void *dn_neigh_seq_start(struct seq_file *seq, loff_t *pos)
-{
-	return neigh_seq_start(seq, pos, &dn_neigh_table,
-			       NEIGH_SEQ_NEIGH_ONLY);
-}
-
-static const struct seq_operations dn_neigh_seq_ops = {
-	.start = dn_neigh_seq_start,
-	.next  = neigh_seq_next,
-	.stop  = neigh_seq_stop,
-	.show  = dn_neigh_seq_show,
-};
-#endif
-
-void __init dn_neigh_init(void)
-{
-	neigh_table_init(NEIGH_DN_TABLE, &dn_neigh_table);
-	proc_create_net("decnet_neigh", 0444, init_net.proc_net,
-			&dn_neigh_seq_ops, sizeof(struct neigh_seq_state));
-}
-
-void __exit dn_neigh_cleanup(void)
-{
-	remove_proc_entry("decnet_neigh", init_net.proc_net);
-	neigh_table_clear(NEIGH_DN_TABLE, &dn_neigh_table);
-}
diff --git a/net/decnet/dn_nsp_in.c b/net/decnet/dn_nsp_in.c
deleted file mode 100644
index c59be5b04479..000000000000
--- a/net/decnet/dn_nsp_in.c
+++ /dev/null
@@ -1,907 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * 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 Network Services Protocol (Input)
- *
- * Author:      Eduardo Marcelo Serrat <emserrat@geocities.com>
- *
- * Changes:
- *
- *    Steve Whitehouse:  Split into dn_nsp_in.c and dn_nsp_out.c from
- *                       original dn_nsp.c.
- *    Steve Whitehouse:  Updated to work with my new routing architecture.
- *    Steve Whitehouse:  Add changes from Eduardo Serrat's patches.
- *    Steve Whitehouse:  Put all ack handling code in a common routine.
- *    Steve Whitehouse:  Put other common bits into dn_nsp_rx()
- *    Steve Whitehouse:  More checks on skb->len to catch bogus packets
- *                       Fixed various race conditions and possible nasties.
- *    Steve Whitehouse:  Now handles returned conninit frames.
- *     David S. Miller:  New socket locking
- *    Steve Whitehouse:  Fixed lockup when socket filtering was enabled.
- *         Paul Koning:  Fix to push CC sockets into RUN when acks are
- *                       received.
- *    Steve Whitehouse:
- *   Patrick Caulfield:  Checking conninits for correctness & sending of error
- *                       responses.
- *    Steve Whitehouse:  Added backlog congestion level return codes.
- *   Patrick Caulfield:
- *    Steve Whitehouse:  Added flow control support (outbound)
- *    Steve Whitehouse:  Prepare for nonlinear skbs
- */
-
-/******************************************************************************
-    (c) 1995-1998 E.M. Serrat		emserrat@geocities.com
-
-*******************************************************************************/
-
-#include <linux/errno.h>
-#include <linux/filter.h>
-#include <linux/types.h>
-#include <linux/socket.h>
-#include <linux/in.h>
-#include <linux/kernel.h>
-#include <linux/timer.h>
-#include <linux/string.h>
-#include <linux/sockios.h>
-#include <linux/net.h>
-#include <linux/netdevice.h>
-#include <linux/inet.h>
-#include <linux/route.h>
-#include <linux/slab.h>
-#include <net/sock.h>
-#include <net/tcp_states.h>
-#include <linux/fcntl.h>
-#include <linux/mm.h>
-#include <linux/termios.h>
-#include <linux/interrupt.h>
-#include <linux/proc_fs.h>
-#include <linux/stat.h>
-#include <linux/init.h>
-#include <linux/poll.h>
-#include <linux/netfilter_decnet.h>
-#include <net/neighbour.h>
-#include <net/dst.h>
-#include <net/dn.h>
-#include <net/dn_nsp.h>
-#include <net/dn_dev.h>
-#include <net/dn_route.h>
-
-extern int decnet_log_martians;
-
-static void dn_log_martian(struct sk_buff *skb, const char *msg)
-{
-	if (decnet_log_martians) {
-		char *devname = skb->dev ? skb->dev->name : "???";
-		struct dn_skb_cb *cb = DN_SKB_CB(skb);
-		net_info_ratelimited("DECnet: Martian packet (%s) dev=%s src=0x%04hx dst=0x%04hx srcport=0x%04hx dstport=0x%04hx\n",
-				     msg, devname,
-				     le16_to_cpu(cb->src),
-				     le16_to_cpu(cb->dst),
-				     le16_to_cpu(cb->src_port),
-				     le16_to_cpu(cb->dst_port));
-	}
-}
-
-/*
- * For this function we've flipped the cross-subchannel bit
- * if the message is an otherdata or linkservice message. Thus
- * we can use it to work out what to update.
- */
-static void dn_ack(struct sock *sk, struct sk_buff *skb, unsigned short ack)
-{
-	struct dn_scp *scp = DN_SK(sk);
-	unsigned short type = ((ack >> 12) & 0x0003);
-	int wakeup = 0;
-
-	switch (type) {
-	case 0: /* ACK - Data */
-		if (dn_after(ack, scp->ackrcv_dat)) {
-			scp->ackrcv_dat = ack & 0x0fff;
-			wakeup |= dn_nsp_check_xmit_queue(sk, skb,
-							  &scp->data_xmit_queue,
-							  ack);
-		}
-		break;
-	case 1: /* NAK - Data */
-		break;
-	case 2: /* ACK - OtherData */
-		if (dn_after(ack, scp->ackrcv_oth)) {
-			scp->ackrcv_oth = ack & 0x0fff;
-			wakeup |= dn_nsp_check_xmit_queue(sk, skb,
-							  &scp->other_xmit_queue,
-							  ack);
-		}
-		break;
-	case 3: /* NAK - OtherData */
-		break;
-	}
-
-	if (wakeup && !sock_flag(sk, SOCK_DEAD))
-		sk->sk_state_change(sk);
-}
-
-/*
- * This function is a universal ack processor.
- */
-static int dn_process_ack(struct sock *sk, struct sk_buff *skb, int oth)
-{
-	__le16 *ptr = (__le16 *)skb->data;
-	int len = 0;
-	unsigned short ack;
-
-	if (skb->len < 2)
-		return len;
-
-	if ((ack = le16_to_cpu(*ptr)) & 0x8000) {
-		skb_pull(skb, 2);
-		ptr++;
-		len += 2;
-		if ((ack & 0x4000) == 0) {
-			if (oth)
-				ack ^= 0x2000;
-			dn_ack(sk, skb, ack);
-		}
-	}
-
-	if (skb->len < 2)
-		return len;
-
-	if ((ack = le16_to_cpu(*ptr)) & 0x8000) {
-		skb_pull(skb, 2);
-		len += 2;
-		if ((ack & 0x4000) == 0) {
-			if (oth)
-				ack ^= 0x2000;
-			dn_ack(sk, skb, ack);
-		}
-	}
-
-	return len;
-}
-
-
-/**
- * dn_check_idf - Check an image data field format is correct.
- * @pptr: Pointer to pointer to image data
- * @len: Pointer to length of image data
- * @max: The maximum allowed length of the data in the image data field
- * @follow_on: Check that this many bytes exist beyond the end of the image data
- *
- * Returns: 0 if ok, -1 on error
- */
-static inline int dn_check_idf(unsigned char **pptr, int *len, unsigned char max, unsigned char follow_on)
-{
-	unsigned char *ptr = *pptr;
-	unsigned char flen = *ptr++;
-
-	(*len)--;
-	if (flen > max)
-		return -1;
-	if ((flen + follow_on) > *len)
-		return -1;
-
-	*len -= flen;
-	*pptr = ptr + flen;
-	return 0;
-}
-
-/*
- * Table of reason codes to pass back to node which sent us a badly
- * formed message, plus text messages for the log. A zero entry in
- * the reason field means "don't reply" otherwise a disc init is sent with
- * the specified reason code.
- */
-static struct {
-	unsigned short reason;
-	const char *text;
-} ci_err_table[] = {
- { 0,             "CI: Truncated message" },
- { NSP_REASON_ID, "CI: Destination username error" },
- { NSP_REASON_ID, "CI: Destination username type" },
- { NSP_REASON_US, "CI: Source username error" },
- { 0,             "CI: Truncated at menuver" },
- { 0,             "CI: Truncated before access or user data" },
- { NSP_REASON_IO, "CI: Access data format error" },
- { NSP_REASON_IO, "CI: User data format error" }
-};
-
-/*
- * This function uses a slightly different lookup method
- * to find its sockets, since it searches on object name/number
- * rather than port numbers. Various tests are done to ensure that
- * the incoming data is in the correct format before it is queued to
- * a socket.
- */
-static struct sock *dn_find_listener(struct sk_buff *skb, unsigned short *reason)
-{
-	struct dn_skb_cb *cb = DN_SKB_CB(skb);
-	struct nsp_conn_init_msg *msg = (struct nsp_conn_init_msg *)skb->data;
-	struct sockaddr_dn dstaddr;
-	struct sockaddr_dn srcaddr;
-	unsigned char type = 0;
-	int dstlen;
-	int srclen;
-	unsigned char *ptr;
-	int len;
-	int err = 0;
-	unsigned char menuver;
-
-	memset(&dstaddr, 0, sizeof(struct sockaddr_dn));
-	memset(&srcaddr, 0, sizeof(struct sockaddr_dn));
-
-	/*
-	 * 1. Decode & remove message header
-	 */
-	cb->src_port = msg->srcaddr;
-	cb->dst_port = msg->dstaddr;
-	cb->services = msg->services;
-	cb->info     = msg->info;
-	cb->segsize  = le16_to_cpu(msg->segsize);
-
-	if (!pskb_may_pull(skb, sizeof(*msg)))
-		goto err_out;
-
-	skb_pull(skb, sizeof(*msg));
-
-	len = skb->len;
-	ptr = skb->data;
-
-	/*
-	 * 2. Check destination end username format
-	 */
-	dstlen = dn_username2sockaddr(ptr, len, &dstaddr, &type);
-	err++;
-	if (dstlen < 0)
-		goto err_out;
-
-	err++;
-	if (type > 1)
-		goto err_out;
-
-	len -= dstlen;
-	ptr += dstlen;
-
-	/*
-	 * 3. Check source end username format
-	 */
-	srclen = dn_username2sockaddr(ptr, len, &srcaddr, &type);
-	err++;
-	if (srclen < 0)
-		goto err_out;
-
-	len -= srclen;
-	ptr += srclen;
-	err++;
-	if (len < 1)
-		goto err_out;
-
-	menuver = *ptr;
-	ptr++;
-	len--;
-
-	/*
-	 * 4. Check that optional data actually exists if menuver says it does
-	 */
-	err++;
-	if ((menuver & (DN_MENUVER_ACC | DN_MENUVER_USR)) && (len < 1))
-		goto err_out;
-
-	/*
-	 * 5. Check optional access data format
-	 */
-	err++;
-	if (menuver & DN_MENUVER_ACC) {
-		if (dn_check_idf(&ptr, &len, 39, 1))
-			goto err_out;
-		if (dn_check_idf(&ptr, &len, 39, 1))
-			goto err_out;
-		if (dn_check_idf(&ptr, &len, 39, (menuver & DN_MENUVER_USR) ? 1 : 0))
-			goto err_out;
-	}
-
-	/*
-	 * 6. Check optional user data format
-	 */
-	err++;
-	if (menuver & DN_MENUVER_USR) {
-		if (dn_check_idf(&ptr, &len, 16, 0))
-			goto err_out;
-	}
-
-	/*
-	 * 7. Look up socket based on destination end username
-	 */
-	return dn_sklist_find_listener(&dstaddr);
-err_out:
-	dn_log_martian(skb, ci_err_table[err].text);
-	*reason = ci_err_table[err].reason;
-	return NULL;
-}
-
-
-static void dn_nsp_conn_init(struct sock *sk, struct sk_buff *skb)
-{
-	if (sk_acceptq_is_full(sk)) {
-		kfree_skb(skb);
-		return;
-	}
-
-	sk_acceptq_added(sk);
-	skb_queue_tail(&sk->sk_receive_queue, skb);
-	sk->sk_state_change(sk);
-}
-
-static void dn_nsp_conn_conf(struct sock *sk, struct sk_buff *skb)
-{
-	struct dn_skb_cb *cb = DN_SKB_CB(skb);
-	struct dn_scp *scp = DN_SK(sk);
-	unsigned char *ptr;
-
-	if (skb->len < 4)
-		goto out;
-
-	ptr = skb->data;
-	cb->services = *ptr++;
-	cb->info = *ptr++;
-	cb->segsize = le16_to_cpu(*(__le16 *)ptr);
-
-	if ((scp->state == DN_CI) || (scp->state == DN_CD)) {
-		scp->persist = 0;
-		scp->addrrem = cb->src_port;
-		sk->sk_state = TCP_ESTABLISHED;
-		scp->state = DN_RUN;
-		scp->services_rem = cb->services;
-		scp->info_rem = cb->info;
-		scp->segsize_rem = cb->segsize;
-
-		if ((scp->services_rem & NSP_FC_MASK) == NSP_FC_NONE)
-			scp->max_window = decnet_no_fc_max_cwnd;
-
-		if (skb->len > 0) {
-			u16 dlen = *skb->data;
-			if ((dlen <= 16) && (dlen <= skb->len)) {
-				scp->conndata_in.opt_optl = cpu_to_le16(dlen);
-				skb_copy_from_linear_data_offset(skb, 1,
-					      scp->conndata_in.opt_data, dlen);
-			}
-		}
-		dn_nsp_send_link(sk, DN_NOCHANGE, 0);
-		if (!sock_flag(sk, SOCK_DEAD))
-			sk->sk_state_change(sk);
-	}
-
-out:
-	kfree_skb(skb);
-}
-
-static void dn_nsp_conn_ack(struct sock *sk, struct sk_buff *skb)
-{
-	struct dn_scp *scp = DN_SK(sk);
-
-	if (scp->state == DN_CI) {
-		scp->state = DN_CD;
-		scp->persist = 0;
-	}
-
-	kfree_skb(skb);
-}
-
-static void dn_nsp_disc_init(struct sock *sk, struct sk_buff *skb)
-{
-	struct dn_scp *scp = DN_SK(sk);
-	struct dn_skb_cb *cb = DN_SKB_CB(skb);
-	unsigned short reason;
-
-	if (skb->len < 2)
-		goto out;
-
-	reason = le16_to_cpu(*(__le16 *)skb->data);
-	skb_pull(skb, 2);
-
-	scp->discdata_in.opt_status = cpu_to_le16(reason);
-	scp->discdata_in.opt_optl   = 0;
-	memset(scp->discdata_in.opt_data, 0, 16);
-
-	if (skb->len > 0) {
-		u16 dlen = *skb->data;
-		if ((dlen <= 16) && (dlen <= skb->len)) {
-			scp->discdata_in.opt_optl = cpu_to_le16(dlen);
-			skb_copy_from_linear_data_offset(skb, 1, scp->discdata_in.opt_data, dlen);
-		}
-	}
-
-	scp->addrrem = cb->src_port;
-	sk->sk_state = TCP_CLOSE;
-
-	switch (scp->state) {
-	case DN_CI:
-	case DN_CD:
-		scp->state = DN_RJ;
-		sk->sk_err = ECONNREFUSED;
-		break;
-	case DN_RUN:
-		sk->sk_shutdown |= SHUTDOWN_MASK;
-		scp->state = DN_DN;
-		break;
-	case DN_DI:
-		scp->state = DN_DIC;
-		break;
-	}
-
-	if (!sock_flag(sk, SOCK_DEAD)) {
-		if (sk->sk_socket->state != SS_UNCONNECTED)
-			sk->sk_socket->state = SS_DISCONNECTING;
-		sk->sk_state_change(sk);
-	}
-
-	/*
-	 * It appears that its possible for remote machines to send disc
-	 * init messages with no port identifier if we are in the CI and
-	 * possibly also the CD state. Obviously we shouldn't reply with
-	 * a message if we don't know what the end point is.
-	 */
-	if (scp->addrrem) {
-		dn_nsp_send_disc(sk, NSP_DISCCONF, NSP_REASON_DC, GFP_ATOMIC);
-	}
-	scp->persist_fxn = dn_destroy_timer;
-	scp->persist = dn_nsp_persist(sk);
-
-out:
-	kfree_skb(skb);
-}
-
-/*
- * disc_conf messages are also called no_resources or no_link
- * messages depending upon the "reason" field.
- */
-static void dn_nsp_disc_conf(struct sock *sk, struct sk_buff *skb)
-{
-	struct dn_scp *scp = DN_SK(sk);
-	unsigned short reason;
-
-	if (skb->len != 2)
-		goto out;
-
-	reason = le16_to_cpu(*(__le16 *)skb->data);
-
-	sk->sk_state = TCP_CLOSE;
-
-	switch (scp->state) {
-	case DN_CI:
-		scp->state = DN_NR;
-		break;
-	case DN_DR:
-		if (reason == NSP_REASON_DC)
-			scp->state = DN_DRC;
-		if (reason == NSP_REASON_NL)
-			scp->state = DN_CN;
-		break;
-	case DN_DI:
-		scp->state = DN_DIC;
-		break;
-	case DN_RUN:
-		sk->sk_shutdown |= SHUTDOWN_MASK;
-		fallthrough;
-	case DN_CC:
-		scp->state = DN_CN;
-	}
-
-	if (!sock_flag(sk, SOCK_DEAD)) {
-		if (sk->sk_socket->state != SS_UNCONNECTED)
-			sk->sk_socket->state = SS_DISCONNECTING;
-		sk->sk_state_change(sk);
-	}
-
-	scp->persist_fxn = dn_destroy_timer;
-	scp->persist = dn_nsp_persist(sk);
-
-out:
-	kfree_skb(skb);
-}
-
-static void dn_nsp_linkservice(struct sock *sk, struct sk_buff *skb)
-{
-	struct dn_scp *scp = DN_SK(sk);
-	unsigned short segnum;
-	unsigned char lsflags;
-	signed char fcval;
-	int wake_up = 0;
-	char *ptr = skb->data;
-	unsigned char fctype = scp->services_rem & NSP_FC_MASK;
-
-	if (skb->len != 4)
-		goto out;
-
-	segnum = le16_to_cpu(*(__le16 *)ptr);
-	ptr += 2;
-	lsflags = *(unsigned char *)ptr++;
-	fcval = *ptr;
-
-	/*
-	 * Here we ignore erroneous packets which should really
-	 * should cause a connection abort. It is not critical
-	 * for now though.
-	 */
-	if (lsflags & 0xf8)
-		goto out;
-
-	if (seq_next(scp->numoth_rcv, segnum)) {
-		seq_add(&scp->numoth_rcv, 1);
-		switch(lsflags & 0x04) { /* FCVAL INT */
-		case 0x00: /* Normal Request */
-			switch(lsflags & 0x03) { /* FCVAL MOD */
-			case 0x00: /* Request count */
-				if (fcval < 0) {
-					unsigned char p_fcval = -fcval;
-					if ((scp->flowrem_dat > p_fcval) &&
-					    (fctype == NSP_FC_SCMC)) {
-						scp->flowrem_dat -= p_fcval;
-					}
-				} else if (fcval > 0) {
-					scp->flowrem_dat += fcval;
-					wake_up = 1;
-				}
-				break;
-			case 0x01: /* Stop outgoing data */
-				scp->flowrem_sw = DN_DONTSEND;
-				break;
-			case 0x02: /* Ok to start again */
-				scp->flowrem_sw = DN_SEND;
-				dn_nsp_output(sk);
-				wake_up = 1;
-			}
-			break;
-		case 0x04: /* Interrupt Request */
-			if (fcval > 0) {
-				scp->flowrem_oth += fcval;
-				wake_up = 1;
-			}
-			break;
-		}
-		if (wake_up && !sock_flag(sk, SOCK_DEAD))
-			sk->sk_state_change(sk);
-	}
-
-	dn_nsp_send_oth_ack(sk);
-
-out:
-	kfree_skb(skb);
-}
-
-/*
- * Copy of sock_queue_rcv_skb (from sock.h) without
- * bh_lock_sock() (its already held when this is called) which
- * also allows data and other data to be queued to a socket.
- */
-static __inline__ int dn_queue_skb(struct sock *sk, struct sk_buff *skb, int sig, struct sk_buff_head *queue)
-{
-	int err;
-
-	/* Cast skb->rcvbuf to unsigned... It's pointless, but reduces
-	   number of warnings when compiling with -W --ANK
-	 */
-	if (atomic_read(&sk->sk_rmem_alloc) + skb->truesize >=
-	    (unsigned int)sk->sk_rcvbuf) {
-		err = -ENOMEM;
-		goto out;
-	}
-
-	err = sk_filter(sk, skb);
-	if (err)
-		goto out;
-
-	skb_set_owner_r(skb, sk);
-	skb_queue_tail(queue, skb);
-
-	if (!sock_flag(sk, SOCK_DEAD))
-		sk->sk_data_ready(sk);
-out:
-	return err;
-}
-
-static void dn_nsp_otherdata(struct sock *sk, struct sk_buff *skb)
-{
-	struct dn_scp *scp = DN_SK(sk);
-	unsigned short segnum;
-	struct dn_skb_cb *cb = DN_SKB_CB(skb);
-	int queued = 0;
-
-	if (skb->len < 2)
-		goto out;
-
-	cb->segnum = segnum = le16_to_cpu(*(__le16 *)skb->data);
-	skb_pull(skb, 2);
-
-	if (seq_next(scp->numoth_rcv, segnum)) {
-
-		if (dn_queue_skb(sk, skb, SIGURG, &scp->other_receive_queue) == 0) {
-			seq_add(&scp->numoth_rcv, 1);
-			scp->other_report = 0;
-			queued = 1;
-		}
-	}
-
-	dn_nsp_send_oth_ack(sk);
-out:
-	if (!queued)
-		kfree_skb(skb);
-}
-
-static void dn_nsp_data(struct sock *sk, struct sk_buff *skb)
-{
-	int queued = 0;
-	unsigned short segnum;
-	struct dn_skb_cb *cb = DN_SKB_CB(skb);
-	struct dn_scp *scp = DN_SK(sk);
-
-	if (skb->len < 2)
-		goto out;
-
-	cb->segnum = segnum = le16_to_cpu(*(__le16 *)skb->data);
-	skb_pull(skb, 2);
-
-	if (seq_next(scp->numdat_rcv, segnum)) {
-		if (dn_queue_skb(sk, skb, SIGIO, &sk->sk_receive_queue) == 0) {
-			seq_add(&scp->numdat_rcv, 1);
-			queued = 1;
-		}
-
-		if ((scp->flowloc_sw == DN_SEND) && dn_congested(sk)) {
-			scp->flowloc_sw = DN_DONTSEND;
-			dn_nsp_send_link(sk, DN_DONTSEND, 0);
-		}
-	}
-
-	dn_nsp_send_data_ack(sk);
-out:
-	if (!queued)
-		kfree_skb(skb);
-}
-
-/*
- * If one of our conninit messages is returned, this function
- * deals with it. It puts the socket into the NO_COMMUNICATION
- * state.
- */
-static void dn_returned_conn_init(struct sock *sk, struct sk_buff *skb)
-{
-	struct dn_scp *scp = DN_SK(sk);
-
-	if (scp->state == DN_CI) {
-		scp->state = DN_NC;
-		sk->sk_state = TCP_CLOSE;
-		if (!sock_flag(sk, SOCK_DEAD))
-			sk->sk_state_change(sk);
-	}
-
-	kfree_skb(skb);
-}
-
-static int dn_nsp_no_socket(struct sk_buff *skb, unsigned short reason)
-{
-	struct dn_skb_cb *cb = DN_SKB_CB(skb);
-	int ret = NET_RX_DROP;
-
-	/* Must not reply to returned packets */
-	if (cb->rt_flags & DN_RT_F_RTS)
-		goto out;
-
-	if ((reason != NSP_REASON_OK) && ((cb->nsp_flags & 0x0c) == 0x08)) {
-		switch (cb->nsp_flags & 0x70) {
-		case 0x10:
-		case 0x60: /* (Retransmitted) Connect Init */
-			dn_nsp_return_disc(skb, NSP_DISCINIT, reason);
-			ret = NET_RX_SUCCESS;
-			break;
-		case 0x20: /* Connect Confirm */
-			dn_nsp_return_disc(skb, NSP_DISCCONF, reason);
-			ret = NET_RX_SUCCESS;
-			break;
-		}
-	}
-
-out:
-	kfree_skb(skb);
-	return ret;
-}
-
-static int dn_nsp_rx_packet(struct net *net, struct sock *sk2,
-			    struct sk_buff *skb)
-{
-	struct dn_skb_cb *cb = DN_SKB_CB(skb);
-	struct sock *sk = NULL;
-	unsigned char *ptr = (unsigned char *)skb->data;
-	unsigned short reason = NSP_REASON_NL;
-
-	if (!pskb_may_pull(skb, 2))
-		goto free_out;
-
-	skb_reset_transport_header(skb);
-	cb->nsp_flags = *ptr++;
-
-	if (decnet_debug_level & 2)
-		printk(KERN_DEBUG "dn_nsp_rx: Message type 0x%02x\n", (int)cb->nsp_flags);
-
-	if (cb->nsp_flags & 0x83)
-		goto free_out;
-
-	/*
-	 * Filter out conninits and useless packet types
-	 */
-	if ((cb->nsp_flags & 0x0c) == 0x08) {
-		switch (cb->nsp_flags & 0x70) {
-		case 0x00: /* NOP */
-		case 0x70: /* Reserved */
-		case 0x50: /* Reserved, Phase II node init */
-			goto free_out;
-		case 0x10:
-		case 0x60:
-			if (unlikely(cb->rt_flags & DN_RT_F_RTS))
-				goto free_out;
-			sk = dn_find_listener(skb, &reason);
-			goto got_it;
-		}
-	}
-
-	if (!pskb_may_pull(skb, 3))
-		goto free_out;
-
-	/*
-	 * Grab the destination address.
-	 */
-	cb->dst_port = *(__le16 *)ptr;
-	cb->src_port = 0;
-	ptr += 2;
-
-	/*
-	 * If not a connack, grab the source address too.
-	 */
-	if (pskb_may_pull(skb, 5)) {
-		cb->src_port = *(__le16 *)ptr;
-		ptr += 2;
-		skb_pull(skb, 5);
-	}
-
-	/*
-	 * Returned packets...
-	 * Swap src & dst and look up in the normal way.
-	 */
-	if (unlikely(cb->rt_flags & DN_RT_F_RTS)) {
-		swap(cb->dst_port, cb->src_port);
-		swap(cb->dst, cb->src);
-	}
-
-	/*
-	 * Find the socket to which this skb is destined.
-	 */
-	sk = dn_find_by_skb(skb);
-got_it:
-	if (sk != NULL) {
-		struct dn_scp *scp = DN_SK(sk);
-
-		/* Reset backoff */
-		scp->nsp_rxtshift = 0;
-
-		/*
-		 * We linearize everything except data segments here.
-		 */
-		if (cb->nsp_flags & ~0x60) {
-			if (unlikely(skb_linearize(skb)))
-				goto free_out;
-		}
-
-		return sk_receive_skb(sk, skb, 0);
-	}
-
-	return dn_nsp_no_socket(skb, reason);
-
-free_out:
-	kfree_skb(skb);
-	return NET_RX_DROP;
-}
-
-int dn_nsp_rx(struct sk_buff *skb)
-{
-	return NF_HOOK(NFPROTO_DECNET, NF_DN_LOCAL_IN,
-		       &init_net, NULL, skb, skb->dev, NULL,
-		       dn_nsp_rx_packet);
-}
-
-/*
- * This is the main receive routine for sockets. It is called
- * from the above when the socket is not busy, and also from
- * sock_release() when there is a backlog queued up.
- */
-int dn_nsp_backlog_rcv(struct sock *sk, struct sk_buff *skb)
-{
-	struct dn_scp *scp = DN_SK(sk);
-	struct dn_skb_cb *cb = DN_SKB_CB(skb);
-
-	if (cb->rt_flags & DN_RT_F_RTS) {
-		if (cb->nsp_flags == 0x18 || cb->nsp_flags == 0x68)
-			dn_returned_conn_init(sk, skb);
-		else
-			kfree_skb(skb);
-		return NET_RX_SUCCESS;
-	}
-
-	/*
-	 * Control packet.
-	 */
-	if ((cb->nsp_flags & 0x0c) == 0x08) {
-		switch (cb->nsp_flags & 0x70) {
-		case 0x10:
-		case 0x60:
-			dn_nsp_conn_init(sk, skb);
-			break;
-		case 0x20:
-			dn_nsp_conn_conf(sk, skb);
-			break;
-		case 0x30:
-			dn_nsp_disc_init(sk, skb);
-			break;
-		case 0x40:
-			dn_nsp_disc_conf(sk, skb);
-			break;
-		}
-
-	} else if (cb->nsp_flags == 0x24) {
-		/*
-		 * Special for connacks, 'cos they don't have
-		 * ack data or ack otherdata info.
-		 */
-		dn_nsp_conn_ack(sk, skb);
-	} else {
-		int other = 1;
-
-		/* both data and ack frames can kick a CC socket into RUN */
-		if ((scp->state == DN_CC) && !sock_flag(sk, SOCK_DEAD)) {
-			scp->state = DN_RUN;
-			sk->sk_state = TCP_ESTABLISHED;
-			sk->sk_state_change(sk);
-		}
-
-		if ((cb->nsp_flags & 0x1c) == 0)
-			other = 0;
-		if (cb->nsp_flags == 0x04)
-			other = 0;
-
-		/*
-		 * Read out ack data here, this applies equally
-		 * to data, other data, link service and both
-		 * ack data and ack otherdata.
-		 */
-		dn_process_ack(sk, skb, other);
-
-		/*
-		 * If we've some sort of data here then call a
-		 * suitable routine for dealing with it, otherwise
-		 * the packet is an ack and can be discarded.
-		 */
-		if ((cb->nsp_flags & 0x0c) == 0) {
-
-			if (scp->state != DN_RUN)
-				goto free_out;
-
-			switch (cb->nsp_flags) {
-			case 0x10: /* LS */
-				dn_nsp_linkservice(sk, skb);
-				break;
-			case 0x30: /* OD */
-				dn_nsp_otherdata(sk, skb);
-				break;
-			default:
-				dn_nsp_data(sk, skb);
-			}
-
-		} else { /* Ack, chuck it out here */
-free_out:
-			kfree_skb(skb);
-		}
-	}
-
-	return NET_RX_SUCCESS;
-}
diff --git a/net/decnet/dn_nsp_out.c b/net/decnet/dn_nsp_out.c
deleted file mode 100644
index b05639bdfc8f..000000000000
--- a/net/decnet/dn_nsp_out.c
+++ /dev/null
@@ -1,696 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * 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 Network Services Protocol (Output)
- *
- * Author:      Eduardo Marcelo Serrat <emserrat@geocities.com>
- *
- * Changes:
- *
- *    Steve Whitehouse:  Split into dn_nsp_in.c and dn_nsp_out.c from
- *                       original dn_nsp.c.
- *    Steve Whitehouse:  Updated to work with my new routing architecture.
- *    Steve Whitehouse:  Added changes from Eduardo Serrat's patches.
- *    Steve Whitehouse:  Now conninits have the "return" bit set.
- *    Steve Whitehouse:  Fixes to check alloc'd skbs are non NULL!
- *                       Moved output state machine into one function
- *    Steve Whitehouse:  New output state machine
- *         Paul Koning:  Connect Confirm message fix.
- *      Eduardo Serrat:  Fix to stop dn_nsp_do_disc() sending malformed packets.
- *    Steve Whitehouse:  dn_nsp_output() and friends needed a spring clean
- *    Steve Whitehouse:  Moved dn_nsp_send() in here from route.h
- */
-
-/******************************************************************************
-    (c) 1995-1998 E.M. Serrat		emserrat@geocities.com
-
-*******************************************************************************/
-
-#include <linux/errno.h>
-#include <linux/types.h>
-#include <linux/socket.h>
-#include <linux/in.h>
-#include <linux/kernel.h>
-#include <linux/timer.h>
-#include <linux/string.h>
-#include <linux/sockios.h>
-#include <linux/net.h>
-#include <linux/netdevice.h>
-#include <linux/inet.h>
-#include <linux/route.h>
-#include <linux/slab.h>
-#include <net/sock.h>
-#include <linux/fcntl.h>
-#include <linux/mm.h>
-#include <linux/termios.h>
-#include <linux/interrupt.h>
-#include <linux/proc_fs.h>
-#include <linux/stat.h>
-#include <linux/init.h>
-#include <linux/poll.h>
-#include <linux/if_packet.h>
-#include <linux/jiffies.h>
-#include <net/neighbour.h>
-#include <net/dst.h>
-#include <net/flow.h>
-#include <net/dn.h>
-#include <net/dn_nsp.h>
-#include <net/dn_dev.h>
-#include <net/dn_route.h>
-
-
-static int nsp_backoff[NSP_MAXRXTSHIFT + 1] = { 1, 2, 4, 8, 16, 32, 64, 64, 64, 64, 64, 64, 64 };
-
-static void dn_nsp_send(struct sk_buff *skb)
-{
-	struct sock *sk = skb->sk;
-	struct dn_scp *scp = DN_SK(sk);
-	struct dst_entry *dst;
-	struct flowidn fld;
-
-	skb_reset_transport_header(skb);
-	scp->stamp = jiffies;
-
-	dst = sk_dst_check(sk, 0);
-	if (dst) {
-try_again:
-		skb_dst_set(skb, dst);
-		dst_output(&init_net, skb->sk, skb);
-		return;
-	}
-
-	memset(&fld, 0, sizeof(fld));
-	fld.flowidn_oif = sk->sk_bound_dev_if;
-	fld.saddr = dn_saddr2dn(&scp->addr);
-	fld.daddr = dn_saddr2dn(&scp->peer);
-	dn_sk_ports_copy(&fld, scp);
-	fld.flowidn_proto = DNPROTO_NSP;
-	if (dn_route_output_sock(&sk->sk_dst_cache, &fld, sk, 0) == 0) {
-		dst = sk_dst_get(sk);
-		sk->sk_route_caps = dst->dev->features;
-		goto try_again;
-	}
-
-	sk->sk_err = EHOSTUNREACH;
-	if (!sock_flag(sk, SOCK_DEAD))
-		sk->sk_state_change(sk);
-}
-
-
-/*
- * If sk == NULL, then we assume that we are supposed to be making
- * a routing layer skb. If sk != NULL, then we are supposed to be
- * creating an skb for the NSP layer.
- *
- * The eventual aim is for each socket to have a cached header size
- * for its outgoing packets, and to set hdr from this when sk != NULL.
- */
-struct sk_buff *dn_alloc_skb(struct sock *sk, int size, gfp_t pri)
-{
-	struct sk_buff *skb;
-	int hdr = 64;
-
-	if ((skb = alloc_skb(size + hdr, pri)) == NULL)
-		return NULL;
-
-	skb->protocol = htons(ETH_P_DNA_RT);
-	skb->pkt_type = PACKET_OUTGOING;
-
-	if (sk)
-		skb_set_owner_w(skb, sk);
-
-	skb_reserve(skb, hdr);
-
-	return skb;
-}
-
-/*
- * Calculate persist timer based upon the smoothed round
- * trip time and the variance. Backoff according to the
- * nsp_backoff[] array.
- */
-unsigned long dn_nsp_persist(struct sock *sk)
-{
-	struct dn_scp *scp = DN_SK(sk);
-
-	unsigned long t = ((scp->nsp_srtt >> 2) + scp->nsp_rttvar) >> 1;
-
-	t *= nsp_backoff[scp->nsp_rxtshift];
-
-	if (t < HZ) t = HZ;
-	if (t > (600*HZ)) t = (600*HZ);
-
-	if (scp->nsp_rxtshift < NSP_MAXRXTSHIFT)
-		scp->nsp_rxtshift++;
-
-	/* printk(KERN_DEBUG "rxtshift %lu, t=%lu\n", scp->nsp_rxtshift, t); */
-
-	return t;
-}
-
-/*
- * This is called each time we get an estimate for the rtt
- * on the link.
- */
-static void dn_nsp_rtt(struct sock *sk, long rtt)
-{
-	struct dn_scp *scp = DN_SK(sk);
-	long srtt = (long)scp->nsp_srtt;
-	long rttvar = (long)scp->nsp_rttvar;
-	long delta;
-
-	/*
-	 * If the jiffies clock flips over in the middle of timestamp
-	 * gathering this value might turn out negative, so we make sure
-	 * that is it always positive here.
-	 */
-	if (rtt < 0)
-		rtt = -rtt;
-	/*
-	 * Add new rtt to smoothed average
-	 */
-	delta = ((rtt << 3) - srtt);
-	srtt += (delta >> 3);
-	if (srtt >= 1)
-		scp->nsp_srtt = (unsigned long)srtt;
-	else
-		scp->nsp_srtt = 1;
-
-	/*
-	 * Add new rtt variance to smoothed varience
-	 */
-	delta >>= 1;
-	rttvar += ((((delta>0)?(delta):(-delta)) - rttvar) >> 2);
-	if (rttvar >= 1)
-		scp->nsp_rttvar = (unsigned long)rttvar;
-	else
-		scp->nsp_rttvar = 1;
-
-	/* printk(KERN_DEBUG "srtt=%lu rttvar=%lu\n", scp->nsp_srtt, scp->nsp_rttvar); */
-}
-
-/**
- * dn_nsp_clone_and_send - Send a data packet by cloning it
- * @skb: The packet to clone and transmit
- * @gfp: memory allocation flag
- *
- * Clone a queued data or other data packet and transmit it.
- *
- * Returns: The number of times the packet has been sent previously
- */
-static inline unsigned int dn_nsp_clone_and_send(struct sk_buff *skb,
-					     gfp_t gfp)
-{
-	struct dn_skb_cb *cb = DN_SKB_CB(skb);
-	struct sk_buff *skb2;
-	int ret = 0;
-
-	if ((skb2 = skb_clone(skb, gfp)) != NULL) {
-		ret = cb->xmit_count;
-		cb->xmit_count++;
-		cb->stamp = jiffies;
-		skb2->sk = skb->sk;
-		dn_nsp_send(skb2);
-	}
-
-	return ret;
-}
-
-/**
- * dn_nsp_output - Try and send something from socket queues
- * @sk: The socket whose queues are to be investigated
- *
- * Try and send the packet on the end of the data and other data queues.
- * Other data gets priority over data, and if we retransmit a packet we
- * reduce the window by dividing it in two.
- *
- */
-void dn_nsp_output(struct sock *sk)
-{
-	struct dn_scp *scp = DN_SK(sk);
-	struct sk_buff *skb;
-	unsigned int reduce_win = 0;
-
-	/*
-	 * First we check for otherdata/linkservice messages
-	 */
-	if ((skb = skb_peek(&scp->other_xmit_queue)) != NULL)
-		reduce_win = dn_nsp_clone_and_send(skb, GFP_ATOMIC);
-
-	/*
-	 * If we may not send any data, we don't.
-	 * If we are still trying to get some other data down the
-	 * channel, we don't try and send any data.
-	 */
-	if (reduce_win || (scp->flowrem_sw != DN_SEND))
-		goto recalc_window;
-
-	if ((skb = skb_peek(&scp->data_xmit_queue)) != NULL)
-		reduce_win = dn_nsp_clone_and_send(skb, GFP_ATOMIC);
-
-	/*
-	 * If we've sent any frame more than once, we cut the
-	 * send window size in half. There is always a minimum
-	 * window size of one available.
-	 */
-recalc_window:
-	if (reduce_win) {
-		scp->snd_window >>= 1;
-		if (scp->snd_window < NSP_MIN_WINDOW)
-			scp->snd_window = NSP_MIN_WINDOW;
-	}
-}
-
-int dn_nsp_xmit_timeout(struct sock *sk)
-{
-	struct dn_scp *scp = DN_SK(sk);
-
-	dn_nsp_output(sk);
-
-	if (!skb_queue_empty(&scp->data_xmit_queue) ||
-	    !skb_queue_empty(&scp->other_xmit_queue))
-		scp->persist = dn_nsp_persist(sk);
-
-	return 0;
-}
-
-static inline __le16 *dn_mk_common_header(struct dn_scp *scp, struct sk_buff *skb, unsigned char msgflag, int len)
-{
-	unsigned char *ptr = skb_push(skb, len);
-
-	BUG_ON(len < 5);
-
-	*ptr++ = msgflag;
-	*((__le16 *)ptr) = scp->addrrem;
-	ptr += 2;
-	*((__le16 *)ptr) = scp->addrloc;
-	ptr += 2;
-	return (__le16 __force *)ptr;
-}
-
-static __le16 *dn_mk_ack_header(struct sock *sk, struct sk_buff *skb, unsigned char msgflag, int hlen, int other)
-{
-	struct dn_scp *scp = DN_SK(sk);
-	unsigned short acknum = scp->numdat_rcv & 0x0FFF;
-	unsigned short ackcrs = scp->numoth_rcv & 0x0FFF;
-	__le16 *ptr;
-
-	BUG_ON(hlen < 9);
-
-	scp->ackxmt_dat = acknum;
-	scp->ackxmt_oth = ackcrs;
-	acknum |= 0x8000;
-	ackcrs |= 0x8000;
-
-	/* If this is an "other data/ack" message, swap acknum and ackcrs */
-	if (other)
-		swap(acknum, ackcrs);
-
-	/* Set "cross subchannel" bit in ackcrs */
-	ackcrs |= 0x2000;
-
-	ptr = dn_mk_common_header(scp, skb, msgflag, hlen);
-
-	*ptr++ = cpu_to_le16(acknum);
-	*ptr++ = cpu_to_le16(ackcrs);
-
-	return ptr;
-}
-
-static __le16 *dn_nsp_mk_data_header(struct sock *sk, struct sk_buff *skb, int oth)
-{
-	struct dn_scp *scp = DN_SK(sk);
-	struct dn_skb_cb *cb = DN_SKB_CB(skb);
-	__le16 *ptr = dn_mk_ack_header(sk, skb, cb->nsp_flags, 11, oth);
-
-	if (unlikely(oth)) {
-		cb->segnum = scp->numoth;
-		seq_add(&scp->numoth, 1);
-	} else {
-		cb->segnum = scp->numdat;
-		seq_add(&scp->numdat, 1);
-	}
-	*(ptr++) = cpu_to_le16(cb->segnum);
-
-	return ptr;
-}
-
-void dn_nsp_queue_xmit(struct sock *sk, struct sk_buff *skb,
-			gfp_t gfp, int oth)
-{
-	struct dn_scp *scp = DN_SK(sk);
-	struct dn_skb_cb *cb = DN_SKB_CB(skb);
-	unsigned long t = ((scp->nsp_srtt >> 2) + scp->nsp_rttvar) >> 1;
-
-	cb->xmit_count = 0;
-	dn_nsp_mk_data_header(sk, skb, oth);
-
-	/*
-	 * Slow start: If we have been idle for more than
-	 * one RTT, then reset window to min size.
-	 */
-	if (time_is_before_jiffies(scp->stamp + t))
-		scp->snd_window = NSP_MIN_WINDOW;
-
-	if (oth)
-		skb_queue_tail(&scp->other_xmit_queue, skb);
-	else
-		skb_queue_tail(&scp->data_xmit_queue, skb);
-
-	if (scp->flowrem_sw != DN_SEND)
-		return;
-
-	dn_nsp_clone_and_send(skb, gfp);
-}
-
-
-int dn_nsp_check_xmit_queue(struct sock *sk, struct sk_buff *skb, struct sk_buff_head *q, unsigned short acknum)
-{
-	struct dn_skb_cb *cb = DN_SKB_CB(skb);
-	struct dn_scp *scp = DN_SK(sk);
-	struct sk_buff *skb2, *n, *ack = NULL;
-	int wakeup = 0;
-	int try_retrans = 0;
-	unsigned long reftime = cb->stamp;
-	unsigned long pkttime;
-	unsigned short xmit_count;
-	unsigned short segnum;
-
-	skb_queue_walk_safe(q, skb2, n) {
-		struct dn_skb_cb *cb2 = DN_SKB_CB(skb2);
-
-		if (dn_before_or_equal(cb2->segnum, acknum))
-			ack = skb2;
-
-		/* printk(KERN_DEBUG "ack: %s %04x %04x\n", ack ? "ACK" : "SKIP", (int)cb2->segnum, (int)acknum); */
-
-		if (ack == NULL)
-			continue;
-
-		/* printk(KERN_DEBUG "check_xmit_queue: %04x, %d\n", acknum, cb2->xmit_count); */
-
-		/* Does _last_ packet acked have xmit_count > 1 */
-		try_retrans = 0;
-		/* Remember to wake up the sending process */
-		wakeup = 1;
-		/* Keep various statistics */
-		pkttime = cb2->stamp;
-		xmit_count = cb2->xmit_count;
-		segnum = cb2->segnum;
-		/* Remove and drop ack'ed packet */
-		skb_unlink(ack, q);
-		kfree_skb(ack);
-		ack = NULL;
-
-		/*
-		 * We don't expect to see acknowledgements for packets we
-		 * haven't sent yet.
-		 */
-		WARN_ON(xmit_count == 0);
-
-		/*
-		 * If the packet has only been sent once, we can use it
-		 * to calculate the RTT and also open the window a little
-		 * further.
-		 */
-		if (xmit_count == 1) {
-			if (dn_equal(segnum, acknum))
-				dn_nsp_rtt(sk, (long)(pkttime - reftime));
-
-			if (scp->snd_window < scp->max_window)
-				scp->snd_window++;
-		}
-
-		/*
-		 * Packet has been sent more than once. If this is the last
-		 * packet to be acknowledged then we want to send the next
-		 * packet in the send queue again (assumes the remote host does
-		 * go-back-N error control).
-		 */
-		if (xmit_count > 1)
-			try_retrans = 1;
-	}
-
-	if (try_retrans)
-		dn_nsp_output(sk);
-
-	return wakeup;
-}
-
-void dn_nsp_send_data_ack(struct sock *sk)
-{
-	struct sk_buff *skb = NULL;
-
-	if ((skb = dn_alloc_skb(sk, 9, GFP_ATOMIC)) == NULL)
-		return;
-
-	skb_reserve(skb, 9);
-	dn_mk_ack_header(sk, skb, 0x04, 9, 0);
-	dn_nsp_send(skb);
-}
-
-void dn_nsp_send_oth_ack(struct sock *sk)
-{
-	struct sk_buff *skb = NULL;
-
-	if ((skb = dn_alloc_skb(sk, 9, GFP_ATOMIC)) == NULL)
-		return;
-
-	skb_reserve(skb, 9);
-	dn_mk_ack_header(sk, skb, 0x14, 9, 1);
-	dn_nsp_send(skb);
-}
-
-
-void dn_send_conn_ack (struct sock *sk)
-{
-	struct dn_scp *scp = DN_SK(sk);
-	struct sk_buff *skb = NULL;
-	struct nsp_conn_ack_msg *msg;
-
-	if ((skb = dn_alloc_skb(sk, 3, sk->sk_allocation)) == NULL)
-		return;
-
-	msg = skb_put(skb, 3);
-	msg->msgflg = 0x24;
-	msg->dstaddr = scp->addrrem;
-
-	dn_nsp_send(skb);
-}
-
-static int dn_nsp_retrans_conn_conf(struct sock *sk)
-{
-	struct dn_scp *scp = DN_SK(sk);
-
-	if (scp->state == DN_CC)
-		dn_send_conn_conf(sk, GFP_ATOMIC);
-
-	return 0;
-}
-
-void dn_send_conn_conf(struct sock *sk, gfp_t gfp)
-{
-	struct dn_scp *scp = DN_SK(sk);
-	struct sk_buff *skb = NULL;
-	struct nsp_conn_init_msg *msg;
-	__u8 len = (__u8)le16_to_cpu(scp->conndata_out.opt_optl);
-
-	if ((skb = dn_alloc_skb(sk, 50 + len, gfp)) == NULL)
-		return;
-
-	msg = skb_put(skb, sizeof(*msg));
-	msg->msgflg = 0x28;
-	msg->dstaddr = scp->addrrem;
-	msg->srcaddr = scp->addrloc;
-	msg->services = scp->services_loc;
-	msg->info = scp->info_loc;
-	msg->segsize = cpu_to_le16(scp->segsize_loc);
-
-	skb_put_u8(skb, len);
-
-	if (len > 0)
-		skb_put_data(skb, scp->conndata_out.opt_data, len);
-
-
-	dn_nsp_send(skb);
-
-	scp->persist = dn_nsp_persist(sk);
-	scp->persist_fxn = dn_nsp_retrans_conn_conf;
-}
-
-
-static __inline__ void dn_nsp_do_disc(struct sock *sk, unsigned char msgflg,
-			unsigned short reason, gfp_t gfp,
-			struct dst_entry *dst,
-			int ddl, unsigned char *dd, __le16 rem, __le16 loc)
-{
-	struct sk_buff *skb = NULL;
-	int size = 7 + ddl + ((msgflg == NSP_DISCINIT) ? 1 : 0);
-	unsigned char *msg;
-
-	if ((dst == NULL) || (rem == 0)) {
-		net_dbg_ratelimited("DECnet: dn_nsp_do_disc: BUG! Please report this to SteveW@ACM.org rem=%u dst=%p\n",
-				    le16_to_cpu(rem), dst);
-		return;
-	}
-
-	if ((skb = dn_alloc_skb(sk, size, gfp)) == NULL)
-		return;
-
-	msg = skb_put(skb, size);
-	*msg++ = msgflg;
-	*(__le16 *)msg = rem;
-	msg += 2;
-	*(__le16 *)msg = loc;
-	msg += 2;
-	*(__le16 *)msg = cpu_to_le16(reason);
-	msg += 2;
-	if (msgflg == NSP_DISCINIT)
-		*msg++ = ddl;
-
-	if (ddl) {
-		memcpy(msg, dd, ddl);
-	}
-
-	/*
-	 * This doesn't go via the dn_nsp_send() function since we need
-	 * to be able to send disc packets out which have no socket
-	 * associations.
-	 */
-	skb_dst_set(skb, dst_clone(dst));
-	dst_output(&init_net, skb->sk, skb);
-}
-
-
-void dn_nsp_send_disc(struct sock *sk, unsigned char msgflg,
-			unsigned short reason, gfp_t gfp)
-{
-	struct dn_scp *scp = DN_SK(sk);
-	int ddl = 0;
-
-	if (msgflg == NSP_DISCINIT)
-		ddl = le16_to_cpu(scp->discdata_out.opt_optl);
-
-	if (reason == 0)
-		reason = le16_to_cpu(scp->discdata_out.opt_status);
-
-	dn_nsp_do_disc(sk, msgflg, reason, gfp, __sk_dst_get(sk), ddl,
-		scp->discdata_out.opt_data, scp->addrrem, scp->addrloc);
-}
-
-
-void dn_nsp_return_disc(struct sk_buff *skb, unsigned char msgflg,
-			unsigned short reason)
-{
-	struct dn_skb_cb *cb = DN_SKB_CB(skb);
-	int ddl = 0;
-	gfp_t gfp = GFP_ATOMIC;
-
-	dn_nsp_do_disc(NULL, msgflg, reason, gfp, skb_dst(skb), ddl,
-			NULL, cb->src_port, cb->dst_port);
-}
-
-
-void dn_nsp_send_link(struct sock *sk, unsigned char lsflags, char fcval)
-{
-	struct dn_scp *scp = DN_SK(sk);
-	struct sk_buff *skb;
-	unsigned char *ptr;
-	gfp_t gfp = GFP_ATOMIC;
-
-	if ((skb = dn_alloc_skb(sk, DN_MAX_NSP_DATA_HEADER + 2, gfp)) == NULL)
-		return;
-
-	skb_reserve(skb, DN_MAX_NSP_DATA_HEADER);
-	ptr = skb_put(skb, 2);
-	DN_SKB_CB(skb)->nsp_flags = 0x10;
-	*ptr++ = lsflags;
-	*ptr = fcval;
-
-	dn_nsp_queue_xmit(sk, skb, gfp, 1);
-
-	scp->persist = dn_nsp_persist(sk);
-	scp->persist_fxn = dn_nsp_xmit_timeout;
-}
-
-static int dn_nsp_retrans_conninit(struct sock *sk)
-{
-	struct dn_scp *scp = DN_SK(sk);
-
-	if (scp->state == DN_CI)
-		dn_nsp_send_conninit(sk, NSP_RCI);
-
-	return 0;
-}
-
-void dn_nsp_send_conninit(struct sock *sk, unsigned char msgflg)
-{
-	struct dn_scp *scp = DN_SK(sk);
-	struct nsp_conn_init_msg *msg;
-	unsigned char aux;
-	unsigned char menuver;
-	struct dn_skb_cb *cb;
-	unsigned char type = 1;
-	gfp_t allocation = (msgflg == NSP_CI) ? sk->sk_allocation : GFP_ATOMIC;
-	struct sk_buff *skb = dn_alloc_skb(sk, 200, allocation);
-
-	if (!skb)
-		return;
-
-	cb  = DN_SKB_CB(skb);
-	msg = skb_put(skb, sizeof(*msg));
-
-	msg->msgflg	= msgflg;
-	msg->dstaddr	= 0x0000;		/* Remote Node will assign it*/
-
-	msg->srcaddr	= scp->addrloc;
-	msg->services	= scp->services_loc;	/* Requested flow control    */
-	msg->info	= scp->info_loc;	/* Version Number            */
-	msg->segsize	= cpu_to_le16(scp->segsize_loc);	/* Max segment size  */
-
-	if (scp->peer.sdn_objnum)
-		type = 0;
-
-	skb_put(skb, dn_sockaddr2username(&scp->peer,
-					  skb_tail_pointer(skb), type));
-	skb_put(skb, dn_sockaddr2username(&scp->addr,
-					  skb_tail_pointer(skb), 2));
-
-	menuver = DN_MENUVER_ACC | DN_MENUVER_USR;
-	if (scp->peer.sdn_flags & SDF_PROXY)
-		menuver |= DN_MENUVER_PRX;
-	if (scp->peer.sdn_flags & SDF_UICPROXY)
-		menuver |= DN_MENUVER_UIC;
-
-	skb_put_u8(skb, menuver);	/* Menu Version		*/
-
-	aux = scp->accessdata.acc_userl;
-	skb_put_u8(skb, aux);
-	if (aux > 0)
-		skb_put_data(skb, scp->accessdata.acc_user, aux);
-
-	aux = scp->accessdata.acc_passl;
-	skb_put_u8(skb, aux);
-	if (aux > 0)
-		skb_put_data(skb, scp->accessdata.acc_pass, aux);
-
-	aux = scp->accessdata.acc_accl;
-	skb_put_u8(skb, aux);
-	if (aux > 0)
-		skb_put_data(skb, scp->accessdata.acc_acc, aux);
-
-	aux = (__u8)le16_to_cpu(scp->conndata_out.opt_optl);
-	skb_put_u8(skb, aux);
-	if (aux > 0)
-		skb_put_data(skb, scp->conndata_out.opt_data, aux);
-
-	scp->persist = dn_nsp_persist(sk);
-	scp->persist_fxn = dn_nsp_retrans_conninit;
-
-	cb->rt_flags = DN_RT_F_RQR;
-
-	dn_nsp_send(skb);
-}
diff --git a/net/decnet/dn_route.c b/net/decnet/dn_route.c
deleted file mode 100644
index ac2ee1689111..000000000000
--- a/net/decnet/dn_route.c
+++ /dev/null
@@ -1,1922 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * 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 Routing Functions (Endnode and Router)
- *
- * Authors:     Steve Whitehouse <SteveW@ACM.org>
- *              Eduardo Marcelo Serrat <emserrat@geocities.com>
- *
- * Changes:
- *              Steve Whitehouse : Fixes to allow "intra-ethernet" and
- *                                 "return-to-sender" bits on outgoing
- *                                 packets.
- *		Steve Whitehouse : Timeouts for cached routes.
- *              Steve Whitehouse : Use dst cache for input routes too.
- *              Steve Whitehouse : Fixed error values in dn_send_skb.
- *              Steve Whitehouse : Rework routing functions to better fit
- *                                 DECnet routing design
- *              Alexey Kuznetsov : New SMP locking
- *              Steve Whitehouse : More SMP locking changes & dn_cache_dump()
- *              Steve Whitehouse : Prerouting NF hook, now really is prerouting.
- *				   Fixed possible skb leak in rtnetlink funcs.
- *              Steve Whitehouse : Dave Miller's dynamic hash table sizing and
- *                                 Alexey Kuznetsov's finer grained locking
- *                                 from ipv4/route.c.
- *              Steve Whitehouse : Routing is now starting to look like a
- *                                 sensible set of code now, mainly due to
- *                                 my copying the IPv4 routing code. The
- *                                 hooks here are modified and will continue
- *                                 to evolve for a while.
- *              Steve Whitehouse : Real SMP at last :-) Also new netfilter
- *                                 stuff. Look out raw sockets your days
- *                                 are numbered!
- *              Steve Whitehouse : Added return-to-sender functions. Added
- *                                 backlog congestion level return codes.
- *		Steve Whitehouse : Fixed bug where routes were set up with
- *                                 no ref count on net devices.
- *              Steve Whitehouse : RCU for the route cache
- *              Steve Whitehouse : Preparations for the flow cache
- *              Steve Whitehouse : Prepare for nonlinear skbs
- */
-
-/******************************************************************************
-    (c) 1995-1998 E.M. Serrat		emserrat@geocities.com
-
-*******************************************************************************/
-
-#include <linux/errno.h>
-#include <linux/types.h>
-#include <linux/socket.h>
-#include <linux/in.h>
-#include <linux/kernel.h>
-#include <linux/sockios.h>
-#include <linux/net.h>
-#include <linux/netdevice.h>
-#include <linux/inet.h>
-#include <linux/route.h>
-#include <linux/in_route.h>
-#include <linux/slab.h>
-#include <net/sock.h>
-#include <linux/mm.h>
-#include <linux/proc_fs.h>
-#include <linux/seq_file.h>
-#include <linux/init.h>
-#include <linux/rtnetlink.h>
-#include <linux/string.h>
-#include <linux/netfilter_decnet.h>
-#include <linux/rcupdate.h>
-#include <linux/times.h>
-#include <linux/export.h>
-#include <asm/errno.h>
-#include <net/net_namespace.h>
-#include <net/netlink.h>
-#include <net/neighbour.h>
-#include <net/dst.h>
-#include <net/flow.h>
-#include <net/fib_rules.h>
-#include <net/dn.h>
-#include <net/dn_dev.h>
-#include <net/dn_nsp.h>
-#include <net/dn_route.h>
-#include <net/dn_neigh.h>
-#include <net/dn_fib.h>
-
-struct dn_rt_hash_bucket {
-	struct dn_route __rcu *chain;
-	spinlock_t lock;
-};
-
-extern struct neigh_table dn_neigh_table;
-
-
-static unsigned char dn_hiord_addr[6] = {0xAA, 0x00, 0x04, 0x00, 0x00, 0x00};
-
-static const int dn_rt_min_delay = 2 * HZ;
-static const int dn_rt_max_delay = 10 * HZ;
-static const int dn_rt_mtu_expires = 10 * 60 * HZ;
-
-static unsigned long dn_rt_deadline;
-
-static int dn_dst_gc(struct dst_ops *ops);
-static struct dst_entry *dn_dst_check(struct dst_entry *, __u32);
-static unsigned int dn_dst_default_advmss(const struct dst_entry *dst);
-static unsigned int dn_dst_mtu(const struct dst_entry *dst);
-static void dn_dst_destroy(struct dst_entry *);
-static void dn_dst_ifdown(struct dst_entry *, struct net_device *dev, int how);
-static struct dst_entry *dn_dst_negative_advice(struct dst_entry *);
-static void dn_dst_link_failure(struct sk_buff *);
-static void dn_dst_update_pmtu(struct dst_entry *dst, struct sock *sk,
-			       struct sk_buff *skb , u32 mtu,
-			       bool confirm_neigh);
-static void dn_dst_redirect(struct dst_entry *dst, struct sock *sk,
-			    struct sk_buff *skb);
-static struct neighbour *dn_dst_neigh_lookup(const struct dst_entry *dst,
-					     struct sk_buff *skb,
-					     const void *daddr);
-static int dn_route_input(struct sk_buff *);
-static void dn_run_flush(struct timer_list *unused);
-
-static struct dn_rt_hash_bucket *dn_rt_hash_table;
-static unsigned int dn_rt_hash_mask;
-
-static struct timer_list dn_route_timer;
-static DEFINE_TIMER(dn_rt_flush_timer, dn_run_flush);
-int decnet_dst_gc_interval = 2;
-
-static struct dst_ops dn_dst_ops = {
-	.family =		PF_DECnet,
-	.gc_thresh =		128,
-	.gc =			dn_dst_gc,
-	.check =		dn_dst_check,
-	.default_advmss =	dn_dst_default_advmss,
-	.mtu =			dn_dst_mtu,
-	.cow_metrics =		dst_cow_metrics_generic,
-	.destroy =		dn_dst_destroy,
-	.ifdown =		dn_dst_ifdown,
-	.negative_advice =	dn_dst_negative_advice,
-	.link_failure =		dn_dst_link_failure,
-	.update_pmtu =		dn_dst_update_pmtu,
-	.redirect =		dn_dst_redirect,
-	.neigh_lookup =		dn_dst_neigh_lookup,
-};
-
-static void dn_dst_destroy(struct dst_entry *dst)
-{
-	struct dn_route *rt = (struct dn_route *) dst;
-
-	if (rt->n)
-		neigh_release(rt->n);
-	dst_destroy_metrics_generic(dst);
-}
-
-static void dn_dst_ifdown(struct dst_entry *dst, struct net_device *dev, int how)
-{
-	if (how) {
-		struct dn_route *rt = (struct dn_route *) dst;
-		struct neighbour *n = rt->n;
-
-		if (n && n->dev == dev) {
-			n->dev = blackhole_netdev;
-			dev_hold(n->dev);
-			dev_put(dev);
-		}
-	}
-}
-
-static __inline__ unsigned int dn_hash(__le16 src, __le16 dst)
-{
-	__u16 tmp = (__u16 __force)(src ^ dst);
-	tmp ^= (tmp >> 3);
-	tmp ^= (tmp >> 5);
-	tmp ^= (tmp >> 10);
-	return dn_rt_hash_mask & (unsigned int)tmp;
-}
-
-static void dn_dst_check_expire(struct timer_list *unused)
-{
-	int i;
-	struct dn_route *rt;
-	struct dn_route __rcu **rtp;
-	unsigned long now = jiffies;
-	unsigned long expire = 120 * HZ;
-
-	for (i = 0; i <= dn_rt_hash_mask; i++) {
-		rtp = &dn_rt_hash_table[i].chain;
-
-		spin_lock(&dn_rt_hash_table[i].lock);
-		while ((rt = rcu_dereference_protected(*rtp,
-						lockdep_is_held(&dn_rt_hash_table[i].lock))) != NULL) {
-			if (atomic_read(&rt->dst.__refcnt) > 1 ||
-			    (now - rt->dst.lastuse) < expire) {
-				rtp = &rt->dn_next;
-				continue;
-			}
-			*rtp = rt->dn_next;
-			rt->dn_next = NULL;
-			dst_dev_put(&rt->dst);
-			dst_release(&rt->dst);
-		}
-		spin_unlock(&dn_rt_hash_table[i].lock);
-
-		if (jiffies != now)
-			break;
-	}
-
-	mod_timer(&dn_route_timer, now + decnet_dst_gc_interval * HZ);
-}
-
-static int dn_dst_gc(struct dst_ops *ops)
-{
-	struct dn_route *rt;
-	struct dn_route __rcu **rtp;
-	int i;
-	unsigned long now = jiffies;
-	unsigned long expire = 10 * HZ;
-
-	for (i = 0; i <= dn_rt_hash_mask; i++) {
-
-		spin_lock_bh(&dn_rt_hash_table[i].lock);
-		rtp = &dn_rt_hash_table[i].chain;
-
-		while ((rt = rcu_dereference_protected(*rtp,
-						lockdep_is_held(&dn_rt_hash_table[i].lock))) != NULL) {
-			if (atomic_read(&rt->dst.__refcnt) > 1 ||
-			    (now - rt->dst.lastuse) < expire) {
-				rtp = &rt->dn_next;
-				continue;
-			}
-			*rtp = rt->dn_next;
-			rt->dn_next = NULL;
-			dst_dev_put(&rt->dst);
-			dst_release(&rt->dst);
-			break;
-		}
-		spin_unlock_bh(&dn_rt_hash_table[i].lock);
-	}
-
-	return 0;
-}
-
-/*
- * The decnet standards don't impose a particular minimum mtu, what they
- * do insist on is that the routing layer accepts a datagram of at least
- * 230 bytes long. Here we have to subtract the routing header length from
- * 230 to get the minimum acceptable mtu. If there is no neighbour, then we
- * assume the worst and use a long header size.
- *
- * We update both the mtu and the advertised mss (i.e. the segment size we
- * advertise to the other end).
- */
-static void dn_dst_update_pmtu(struct dst_entry *dst, struct sock *sk,
-			       struct sk_buff *skb, u32 mtu,
-			       bool confirm_neigh)
-{
-	struct dn_route *rt = (struct dn_route *) dst;
-	struct neighbour *n = rt->n;
-	u32 min_mtu = 230;
-	struct dn_dev *dn;
-
-	dn = n ? rcu_dereference_raw(n->dev->dn_ptr) : NULL;
-
-	if (dn && dn->use_long == 0)
-		min_mtu -= 6;
-	else
-		min_mtu -= 21;
-
-	if (dst_metric(dst, RTAX_MTU) > mtu && mtu >= min_mtu) {
-		if (!(dst_metric_locked(dst, RTAX_MTU))) {
-			dst_metric_set(dst, RTAX_MTU, mtu);
-			dst_set_expires(dst, dn_rt_mtu_expires);
-		}
-		if (!(dst_metric_locked(dst, RTAX_ADVMSS))) {
-			u32 mss = mtu - DN_MAX_NSP_DATA_HEADER;
-			u32 existing_mss = dst_metric_raw(dst, RTAX_ADVMSS);
-			if (!existing_mss || existing_mss > mss)
-				dst_metric_set(dst, RTAX_ADVMSS, mss);
-		}
-	}
-}
-
-static void dn_dst_redirect(struct dst_entry *dst, struct sock *sk,
-			    struct sk_buff *skb)
-{
-}
-
-/*
- * When a route has been marked obsolete. (e.g. routing cache flush)
- */
-static struct dst_entry *dn_dst_check(struct dst_entry *dst, __u32 cookie)
-{
-	return NULL;
-}
-
-static struct dst_entry *dn_dst_negative_advice(struct dst_entry *dst)
-{
-	dst_release(dst);
-	return NULL;
-}
-
-static void dn_dst_link_failure(struct sk_buff *skb)
-{
-}
-
-static inline int compare_keys(struct flowidn *fl1, struct flowidn *fl2)
-{
-	return ((fl1->daddr ^ fl2->daddr) |
-		(fl1->saddr ^ fl2->saddr) |
-		(fl1->flowidn_mark ^ fl2->flowidn_mark) |
-		(fl1->flowidn_scope ^ fl2->flowidn_scope) |
-		(fl1->flowidn_oif ^ fl2->flowidn_oif) |
-		(fl1->flowidn_iif ^ fl2->flowidn_iif)) == 0;
-}
-
-static int dn_insert_route(struct dn_route *rt, unsigned int hash, struct dn_route **rp)
-{
-	struct dn_route *rth;
-	struct dn_route __rcu **rthp;
-	unsigned long now = jiffies;
-
-	rthp = &dn_rt_hash_table[hash].chain;
-
-	spin_lock_bh(&dn_rt_hash_table[hash].lock);
-	while ((rth = rcu_dereference_protected(*rthp,
-						lockdep_is_held(&dn_rt_hash_table[hash].lock))) != NULL) {
-		if (compare_keys(&rth->fld, &rt->fld)) {
-			/* Put it first */
-			*rthp = rth->dn_next;
-			rcu_assign_pointer(rth->dn_next,
-					   dn_rt_hash_table[hash].chain);
-			rcu_assign_pointer(dn_rt_hash_table[hash].chain, rth);
-
-			dst_hold_and_use(&rth->dst, now);
-			spin_unlock_bh(&dn_rt_hash_table[hash].lock);
-
-			dst_release_immediate(&rt->dst);
-			*rp = rth;
-			return 0;
-		}
-		rthp = &rth->dn_next;
-	}
-
-	rcu_assign_pointer(rt->dn_next, dn_rt_hash_table[hash].chain);
-	rcu_assign_pointer(dn_rt_hash_table[hash].chain, rt);
-
-	dst_hold_and_use(&rt->dst, now);
-	spin_unlock_bh(&dn_rt_hash_table[hash].lock);
-	*rp = rt;
-	return 0;
-}
-
-static void dn_run_flush(struct timer_list *unused)
-{
-	int i;
-	struct dn_route *rt, *next;
-
-	for (i = 0; i < dn_rt_hash_mask; i++) {
-		spin_lock_bh(&dn_rt_hash_table[i].lock);
-
-		rt = xchg((struct dn_route **)&dn_rt_hash_table[i].chain, NULL);
-		if (!rt)
-			goto nothing_to_declare;
-
-		for (; rt; rt = next) {
-			next = rcu_dereference_raw(rt->dn_next);
-			RCU_INIT_POINTER(rt->dn_next, NULL);
-			dst_dev_put(&rt->dst);
-			dst_release(&rt->dst);
-		}
-
-nothing_to_declare:
-		spin_unlock_bh(&dn_rt_hash_table[i].lock);
-	}
-}
-
-static DEFINE_SPINLOCK(dn_rt_flush_lock);
-
-void dn_rt_cache_flush(int delay)
-{
-	unsigned long now = jiffies;
-	int user_mode = !in_interrupt();
-
-	if (delay < 0)
-		delay = dn_rt_min_delay;
-
-	spin_lock_bh(&dn_rt_flush_lock);
-
-	if (del_timer(&dn_rt_flush_timer) && delay > 0 && dn_rt_deadline) {
-		long tmo = (long)(dn_rt_deadline - now);
-
-		if (user_mode && tmo < dn_rt_max_delay - dn_rt_min_delay)
-			tmo = 0;
-
-		if (delay > tmo)
-			delay = tmo;
-	}
-
-	if (delay <= 0) {
-		spin_unlock_bh(&dn_rt_flush_lock);
-		dn_run_flush(NULL);
-		return;
-	}
-
-	if (dn_rt_deadline == 0)
-		dn_rt_deadline = now + dn_rt_max_delay;
-
-	dn_rt_flush_timer.expires = now + delay;
-	add_timer(&dn_rt_flush_timer);
-	spin_unlock_bh(&dn_rt_flush_lock);
-}
-
-/**
- * dn_return_short - Return a short packet to its sender
- * @skb: The packet to return
- *
- */
-static int dn_return_short(struct sk_buff *skb)
-{
-	struct dn_skb_cb *cb;
-	unsigned char *ptr;
-	__le16 *src;
-	__le16 *dst;
-
-	/* Add back headers */
-	skb_push(skb, skb->data - skb_network_header(skb));
-
-	skb = skb_unshare(skb, GFP_ATOMIC);
-	if (!skb)
-		return NET_RX_DROP;
-
-	cb = DN_SKB_CB(skb);
-	/* Skip packet length and point to flags */
-	ptr = skb->data + 2;
-	*ptr++ = (cb->rt_flags & ~DN_RT_F_RQR) | DN_RT_F_RTS;
-
-	dst = (__le16 *)ptr;
-	ptr += 2;
-	src = (__le16 *)ptr;
-	ptr += 2;
-	*ptr = 0; /* Zero hop count */
-
-	swap(*src, *dst);
-
-	skb->pkt_type = PACKET_OUTGOING;
-	dn_rt_finish_output(skb, NULL, NULL);
-	return NET_RX_SUCCESS;
-}
-
-/**
- * dn_return_long - Return a long packet to its sender
- * @skb: The long format packet to return
- *
- */
-static int dn_return_long(struct sk_buff *skb)
-{
-	struct dn_skb_cb *cb;
-	unsigned char *ptr;
-	unsigned char *src_addr, *dst_addr;
-	unsigned char tmp[ETH_ALEN];
-
-	/* Add back all headers */
-	skb_push(skb, skb->data - skb_network_header(skb));
-
-	skb = skb_unshare(skb, GFP_ATOMIC);
-	if (!skb)
-		return NET_RX_DROP;
-
-	cb = DN_SKB_CB(skb);
-	/* Ignore packet length and point to flags */
-	ptr = skb->data + 2;
-
-	/* Skip padding */
-	if (*ptr & DN_RT_F_PF) {
-		char padlen = (*ptr & ~DN_RT_F_PF);
-		ptr += padlen;
-	}
-
-	*ptr++ = (cb->rt_flags & ~DN_RT_F_RQR) | DN_RT_F_RTS;
-	ptr += 2;
-	dst_addr = ptr;
-	ptr += 8;
-	src_addr = ptr;
-	ptr += 6;
-	*ptr = 0; /* Zero hop count */
-
-	/* Swap source and destination */
-	memcpy(tmp, src_addr, ETH_ALEN);
-	memcpy(src_addr, dst_addr, ETH_ALEN);
-	memcpy(dst_addr, tmp, ETH_ALEN);
-
-	skb->pkt_type = PACKET_OUTGOING;
-	dn_rt_finish_output(skb, dst_addr, src_addr);
-	return NET_RX_SUCCESS;
-}
-
-/**
- * dn_route_rx_packet - Try and find a route for an incoming packet
- * @net: The applicable net namespace
- * @sk: Socket packet transmitted on
- * @skb: The packet to find a route for
- *
- * Returns: result of input function if route is found, error code otherwise
- */
-static int dn_route_rx_packet(struct net *net, struct sock *sk, struct sk_buff *skb)
-{
-	struct dn_skb_cb *cb;
-	int err;
-
-	err = dn_route_input(skb);
-	if (err == 0)
-		return dst_input(skb);
-
-	cb = DN_SKB_CB(skb);
-	if (decnet_debug_level & 4) {
-		char *devname = skb->dev ? skb->dev->name : "???";
-
-		printk(KERN_DEBUG
-			"DECnet: dn_route_rx_packet: rt_flags=0x%02x dev=%s len=%d src=0x%04hx dst=0x%04hx err=%d type=%d\n",
-			(int)cb->rt_flags, devname, skb->len,
-			le16_to_cpu(cb->src), le16_to_cpu(cb->dst),
-			err, skb->pkt_type);
-	}
-
-	if ((skb->pkt_type == PACKET_HOST) && (cb->rt_flags & DN_RT_F_RQR)) {
-		switch (cb->rt_flags & DN_RT_PKT_MSK) {
-		case DN_RT_PKT_SHORT:
-			return dn_return_short(skb);
-		case DN_RT_PKT_LONG:
-			return dn_return_long(skb);
-		}
-	}
-
-	kfree_skb(skb);
-	return NET_RX_DROP;
-}
-
-static int dn_route_rx_long(struct sk_buff *skb)
-{
-	struct dn_skb_cb *cb = DN_SKB_CB(skb);
-	unsigned char *ptr = skb->data;
-
-	if (!pskb_may_pull(skb, 21)) /* 20 for long header, 1 for shortest nsp */
-		goto drop_it;
-
-	skb_pull(skb, 20);
-	skb_reset_transport_header(skb);
-
-	/* Destination info */
-	ptr += 2;
-	cb->dst = dn_eth2dn(ptr);
-	if (memcmp(ptr, dn_hiord_addr, 4) != 0)
-		goto drop_it;
-	ptr += 6;
-
-
-	/* Source info */
-	ptr += 2;
-	cb->src = dn_eth2dn(ptr);
-	if (memcmp(ptr, dn_hiord_addr, 4) != 0)
-		goto drop_it;
-	ptr += 6;
-	/* Other junk */
-	ptr++;
-	cb->hops = *ptr++; /* Visit Count */
-
-	return NF_HOOK(NFPROTO_DECNET, NF_DN_PRE_ROUTING,
-		       &init_net, NULL, skb, skb->dev, NULL,
-		       dn_route_rx_packet);
-
-drop_it:
-	kfree_skb(skb);
-	return NET_RX_DROP;
-}
-
-
-
-static int dn_route_rx_short(struct sk_buff *skb)
-{
-	struct dn_skb_cb *cb = DN_SKB_CB(skb);
-	unsigned char *ptr = skb->data;
-
-	if (!pskb_may_pull(skb, 6)) /* 5 for short header + 1 for shortest nsp */
-		goto drop_it;
-
-	skb_pull(skb, 5);
-	skb_reset_transport_header(skb);
-
-	cb->dst = *(__le16 *)ptr;
-	ptr += 2;
-	cb->src = *(__le16 *)ptr;
-	ptr += 2;
-	cb->hops = *ptr & 0x3f;
-
-	return NF_HOOK(NFPROTO_DECNET, NF_DN_PRE_ROUTING,
-		       &init_net, NULL, skb, skb->dev, NULL,
-		       dn_route_rx_packet);
-
-drop_it:
-	kfree_skb(skb);
-	return NET_RX_DROP;
-}
-
-static int dn_route_discard(struct net *net, struct sock *sk, struct sk_buff *skb)
-{
-	/*
-	 * I know we drop the packet here, but that's considered success in
-	 * this case
-	 */
-	kfree_skb(skb);
-	return NET_RX_SUCCESS;
-}
-
-static int dn_route_ptp_hello(struct net *net, struct sock *sk, struct sk_buff *skb)
-{
-	dn_dev_hello(skb);
-	dn_neigh_pointopoint_hello(skb);
-	return NET_RX_SUCCESS;
-}
-
-int dn_route_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev)
-{
-	struct dn_skb_cb *cb;
-	unsigned char flags = 0;
-	__u16 len = le16_to_cpu(*(__le16 *)skb->data);
-	struct dn_dev *dn = rcu_dereference(dev->dn_ptr);
-	unsigned char padlen = 0;
-
-	if (!net_eq(dev_net(dev), &init_net))
-		goto dump_it;
-
-	if (dn == NULL)
-		goto dump_it;
-
-	skb = skb_share_check(skb, GFP_ATOMIC);
-	if (!skb)
-		goto out;
-
-	if (!pskb_may_pull(skb, 3))
-		goto dump_it;
-
-	skb_pull(skb, 2);
-
-	if (len > skb->len)
-		goto dump_it;
-
-	skb_trim(skb, len);
-
-	flags = *skb->data;
-
-	cb = DN_SKB_CB(skb);
-	cb->stamp = jiffies;
-	cb->iif = dev->ifindex;
-
-	/*
-	 * If we have padding, remove it.
-	 */
-	if (flags & DN_RT_F_PF) {
-		padlen = flags & ~DN_RT_F_PF;
-		if (!pskb_may_pull(skb, padlen + 1))
-			goto dump_it;
-		skb_pull(skb, padlen);
-		flags = *skb->data;
-	}
-
-	skb_reset_network_header(skb);
-
-	/*
-	 * Weed out future version DECnet
-	 */
-	if (flags & DN_RT_F_VER)
-		goto dump_it;
-
-	cb->rt_flags = flags;
-
-	if (decnet_debug_level & 1)
-		printk(KERN_DEBUG
-			"dn_route_rcv: got 0x%02x from %s [%d %d %d]\n",
-			(int)flags, dev->name, len, skb->len,
-			padlen);
-
-	if (flags & DN_RT_PKT_CNTL) {
-		if (unlikely(skb_linearize(skb)))
-			goto dump_it;
-
-		switch (flags & DN_RT_CNTL_MSK) {
-		case DN_RT_PKT_INIT:
-			dn_dev_init_pkt(skb);
-			break;
-		case DN_RT_PKT_VERI:
-			dn_dev_veri_pkt(skb);
-			break;
-		}
-
-		if (dn->parms.state != DN_DEV_S_RU)
-			goto dump_it;
-
-		switch (flags & DN_RT_CNTL_MSK) {
-		case DN_RT_PKT_HELO:
-			return NF_HOOK(NFPROTO_DECNET, NF_DN_HELLO,
-				       &init_net, NULL, skb, skb->dev, NULL,
-				       dn_route_ptp_hello);
-
-		case DN_RT_PKT_L1RT:
-		case DN_RT_PKT_L2RT:
-			return NF_HOOK(NFPROTO_DECNET, NF_DN_ROUTE,
-				       &init_net, NULL, skb, skb->dev, NULL,
-				       dn_route_discard);
-		case DN_RT_PKT_ERTH:
-			return NF_HOOK(NFPROTO_DECNET, NF_DN_HELLO,
-				       &init_net, NULL, skb, skb->dev, NULL,
-				       dn_neigh_router_hello);
-
-		case DN_RT_PKT_EEDH:
-			return NF_HOOK(NFPROTO_DECNET, NF_DN_HELLO,
-				       &init_net, NULL, skb, skb->dev, NULL,
-				       dn_neigh_endnode_hello);
-		}
-	} else {
-		if (dn->parms.state != DN_DEV_S_RU)
-			goto dump_it;
-
-		skb_pull(skb, 1); /* Pull flags */
-
-		switch (flags & DN_RT_PKT_MSK) {
-		case DN_RT_PKT_LONG:
-			return dn_route_rx_long(skb);
-		case DN_RT_PKT_SHORT:
-			return dn_route_rx_short(skb);
-		}
-	}
-
-dump_it:
-	kfree_skb(skb);
-out:
-	return NET_RX_DROP;
-}
-
-static int dn_output(struct net *net, struct sock *sk, struct sk_buff *skb)
-{
-	struct dst_entry *dst = skb_dst(skb);
-	struct dn_route *rt = (struct dn_route *)dst;
-	struct net_device *dev = dst->dev;
-	struct dn_skb_cb *cb = DN_SKB_CB(skb);
-
-	int err = -EINVAL;
-
-	if (rt->n == NULL)
-		goto error;
-
-	skb->dev = dev;
-
-	cb->src = rt->rt_saddr;
-	cb->dst = rt->rt_daddr;
-
-	/*
-	 * Always set the Intra-Ethernet bit on all outgoing packets
-	 * originated on this node. Only valid flag from upper layers
-	 * is return-to-sender-requested. Set hop count to 0 too.
-	 */
-	cb->rt_flags &= ~DN_RT_F_RQR;
-	cb->rt_flags |= DN_RT_F_IE;
-	cb->hops = 0;
-
-	return NF_HOOK(NFPROTO_DECNET, NF_DN_LOCAL_OUT,
-		       &init_net, sk, skb, NULL, dev,
-		       dn_to_neigh_output);
-
-error:
-	net_dbg_ratelimited("dn_output: This should not happen\n");
-
-	kfree_skb(skb);
-
-	return err;
-}
-
-static int dn_forward(struct sk_buff *skb)
-{
-	struct dn_skb_cb *cb = DN_SKB_CB(skb);
-	struct dst_entry *dst = skb_dst(skb);
-	struct dn_dev *dn_db = rcu_dereference(dst->dev->dn_ptr);
-	struct dn_route *rt;
-	int header_len;
-	struct net_device *dev = skb->dev;
-
-	if (skb->pkt_type != PACKET_HOST)
-		goto drop;
-
-	/* Ensure that we have enough space for headers */
-	rt = (struct dn_route *)skb_dst(skb);
-	header_len = dn_db->use_long ? 21 : 6;
-	if (skb_cow(skb, LL_RESERVED_SPACE(rt->dst.dev)+header_len))
-		goto drop;
-
-	/*
-	 * Hop count exceeded.
-	 */
-	if (++cb->hops > 30)
-		goto drop;
-
-	skb->dev = rt->dst.dev;
-
-	/*
-	 * If packet goes out same interface it came in on, then set
-	 * the Intra-Ethernet bit. This has no effect for short
-	 * packets, so we don't need to test for them here.
-	 */
-	cb->rt_flags &= ~DN_RT_F_IE;
-	if (rt->rt_flags & RTCF_DOREDIRECT)
-		cb->rt_flags |= DN_RT_F_IE;
-
-	return NF_HOOK(NFPROTO_DECNET, NF_DN_FORWARD,
-		       &init_net, NULL, skb, dev, skb->dev,
-		       dn_to_neigh_output);
-
-drop:
-	kfree_skb(skb);
-	return NET_RX_DROP;
-}
-
-/*
- * Used to catch bugs. This should never normally get
- * called.
- */
-static int dn_rt_bug_out(struct net *net, struct sock *sk, struct sk_buff *skb)
-{
-	struct dn_skb_cb *cb = DN_SKB_CB(skb);
-
-	net_dbg_ratelimited("dn_rt_bug: skb from:%04x to:%04x\n",
-			    le16_to_cpu(cb->src), le16_to_cpu(cb->dst));
-
-	kfree_skb(skb);
-
-	return NET_RX_DROP;
-}
-
-static int dn_rt_bug(struct sk_buff *skb)
-{
-	struct dn_skb_cb *cb = DN_SKB_CB(skb);
-
-	net_dbg_ratelimited("dn_rt_bug: skb from:%04x to:%04x\n",
-			    le16_to_cpu(cb->src), le16_to_cpu(cb->dst));
-
-	kfree_skb(skb);
-
-	return NET_RX_DROP;
-}
-
-static unsigned int dn_dst_default_advmss(const struct dst_entry *dst)
-{
-	return dn_mss_from_pmtu(dst->dev, dst_mtu(dst));
-}
-
-static unsigned int dn_dst_mtu(const struct dst_entry *dst)
-{
-	unsigned int mtu = dst_metric_raw(dst, RTAX_MTU);
-
-	return mtu ? : dst->dev->mtu;
-}
-
-static struct neighbour *dn_dst_neigh_lookup(const struct dst_entry *dst,
-					     struct sk_buff *skb,
-					     const void *daddr)
-{
-	return __neigh_lookup_errno(&dn_neigh_table, daddr, dst->dev);
-}
-
-static int dn_rt_set_next_hop(struct dn_route *rt, struct dn_fib_res *res)
-{
-	struct dn_fib_info *fi = res->fi;
-	struct net_device *dev = rt->dst.dev;
-	unsigned int mss_metric;
-	struct neighbour *n;
-
-	if (fi) {
-		if (DN_FIB_RES_GW(*res) &&
-		    DN_FIB_RES_NH(*res).nh_scope == RT_SCOPE_LINK)
-			rt->rt_gateway = DN_FIB_RES_GW(*res);
-		dst_init_metrics(&rt->dst, fi->fib_metrics, true);
-	}
-	rt->rt_type = res->type;
-
-	if (dev != NULL && rt->n == NULL) {
-		n = __neigh_lookup_errno(&dn_neigh_table, &rt->rt_gateway, dev);
-		if (IS_ERR(n))
-			return PTR_ERR(n);
-		rt->n = n;
-	}
-
-	if (dst_metric(&rt->dst, RTAX_MTU) > rt->dst.dev->mtu)
-		dst_metric_set(&rt->dst, RTAX_MTU, rt->dst.dev->mtu);
-	mss_metric = dst_metric_raw(&rt->dst, RTAX_ADVMSS);
-	if (mss_metric) {
-		unsigned int mss = dn_mss_from_pmtu(dev, dst_mtu(&rt->dst));
-		if (mss_metric > mss)
-			dst_metric_set(&rt->dst, RTAX_ADVMSS, mss);
-	}
-	return 0;
-}
-
-static inline int dn_match_addr(__le16 addr1, __le16 addr2)
-{
-	__u16 tmp = le16_to_cpu(addr1) ^ le16_to_cpu(addr2);
-	int match = 16;
-	while (tmp) {
-		tmp >>= 1;
-		match--;
-	}
-	return match;
-}
-
-static __le16 dnet_select_source(const struct net_device *dev, __le16 daddr, int scope)
-{
-	__le16 saddr = 0;
-	struct dn_dev *dn_db;
-	struct dn_ifaddr *ifa;
-	int best_match = 0;
-	int ret;
-
-	rcu_read_lock();
-	dn_db = rcu_dereference(dev->dn_ptr);
-	for (ifa = rcu_dereference(dn_db->ifa_list);
-	     ifa != NULL;
-	     ifa = rcu_dereference(ifa->ifa_next)) {
-		if (ifa->ifa_scope > scope)
-			continue;
-		if (!daddr) {
-			saddr = ifa->ifa_local;
-			break;
-		}
-		ret = dn_match_addr(daddr, ifa->ifa_local);
-		if (ret > best_match)
-			saddr = ifa->ifa_local;
-		if (best_match == 0)
-			saddr = ifa->ifa_local;
-	}
-	rcu_read_unlock();
-
-	return saddr;
-}
-
-static inline __le16 __dn_fib_res_prefsrc(struct dn_fib_res *res)
-{
-	return dnet_select_source(DN_FIB_RES_DEV(*res), DN_FIB_RES_GW(*res), res->scope);
-}
-
-static inline __le16 dn_fib_rules_map_destination(__le16 daddr, struct dn_fib_res *res)
-{
-	__le16 mask = dnet_make_mask(res->prefixlen);
-	return (daddr&~mask)|res->fi->fib_nh->nh_gw;
-}
-
-static int dn_route_output_slow(struct dst_entry **pprt, const struct flowidn *oldflp, int try_hard)
-{
-	struct flowidn fld = {
-		.daddr = oldflp->daddr,
-		.saddr = oldflp->saddr,
-		.flowidn_scope = RT_SCOPE_UNIVERSE,
-		.flowidn_mark = oldflp->flowidn_mark,
-		.flowidn_iif = LOOPBACK_IFINDEX,
-		.flowidn_oif = oldflp->flowidn_oif,
-	};
-	struct dn_route *rt = NULL;
-	struct net_device *dev_out = NULL, *dev;
-	struct neighbour *neigh = NULL;
-	unsigned int hash;
-	unsigned int flags = 0;
-	struct dn_fib_res res = { .fi = NULL, .type = RTN_UNICAST };
-	int err;
-	int free_res = 0;
-	__le16 gateway = 0;
-
-	if (decnet_debug_level & 16)
-		printk(KERN_DEBUG
-		       "dn_route_output_slow: dst=%04x src=%04x mark=%d"
-		       " iif=%d oif=%d\n", le16_to_cpu(oldflp->daddr),
-		       le16_to_cpu(oldflp->saddr),
-		       oldflp->flowidn_mark, LOOPBACK_IFINDEX,
-		       oldflp->flowidn_oif);
-
-	/* If we have an output interface, verify its a DECnet device */
-	if (oldflp->flowidn_oif) {
-		dev_out = dev_get_by_index(&init_net, oldflp->flowidn_oif);
-		err = -ENODEV;
-		if (dev_out && dev_out->dn_ptr == NULL) {
-			dev_put(dev_out);
-			dev_out = NULL;
-		}
-		if (dev_out == NULL)
-			goto out;
-	}
-
-	/* If we have a source address, verify that its a local address */
-	if (oldflp->saddr) {
-		err = -EADDRNOTAVAIL;
-
-		if (dev_out) {
-			if (dn_dev_islocal(dev_out, oldflp->saddr))
-				goto source_ok;
-			dev_put(dev_out);
-			goto out;
-		}
-		rcu_read_lock();
-		for_each_netdev_rcu(&init_net, dev) {
-			if (!dev->dn_ptr)
-				continue;
-			if (!dn_dev_islocal(dev, oldflp->saddr))
-				continue;
-			if ((dev->flags & IFF_LOOPBACK) &&
-			    oldflp->daddr &&
-			    !dn_dev_islocal(dev, oldflp->daddr))
-				continue;
-
-			dev_out = dev;
-			break;
-		}
-		rcu_read_unlock();
-		if (dev_out == NULL)
-			goto out;
-		dev_hold(dev_out);
-source_ok:
-		;
-	}
-
-	/* No destination? Assume its local */
-	if (!fld.daddr) {
-		fld.daddr = fld.saddr;
-
-		dev_put(dev_out);
-		err = -EINVAL;
-		dev_out = init_net.loopback_dev;
-		if (!dev_out->dn_ptr)
-			goto out;
-		err = -EADDRNOTAVAIL;
-		dev_hold(dev_out);
-		if (!fld.daddr) {
-			fld.daddr =
-			fld.saddr = dnet_select_source(dev_out, 0,
-						       RT_SCOPE_HOST);
-			if (!fld.daddr)
-				goto done;
-		}
-		fld.flowidn_oif = LOOPBACK_IFINDEX;
-		res.type = RTN_LOCAL;
-		goto make_route;
-	}
-
-	if (decnet_debug_level & 16)
-		printk(KERN_DEBUG
-		       "dn_route_output_slow: initial checks complete."
-		       " dst=%04x src=%04x oif=%d try_hard=%d\n",
-		       le16_to_cpu(fld.daddr), le16_to_cpu(fld.saddr),
-		       fld.flowidn_oif, try_hard);
-
-	/*
-	 * N.B. If the kernel is compiled without router support then
-	 * dn_fib_lookup() will evaluate to non-zero so this if () block
-	 * will always be executed.
-	 */
-	err = -ESRCH;
-	if (try_hard || (err = dn_fib_lookup(&fld, &res)) != 0) {
-		struct dn_dev *dn_db;
-		if (err != -ESRCH)
-			goto out;
-		/*
-		 * Here the fallback is basically the standard algorithm for
-		 * routing in endnodes which is described in the DECnet routing
-		 * docs
-		 *
-		 * If we are not trying hard, look in neighbour cache.
-		 * The result is tested to ensure that if a specific output
-		 * device/source address was requested, then we honour that
-		 * here
-		 */
-		if (!try_hard) {
-			neigh = neigh_lookup_nodev(&dn_neigh_table, &init_net, &fld.daddr);
-			if (neigh) {
-				if ((oldflp->flowidn_oif &&
-				    (neigh->dev->ifindex != oldflp->flowidn_oif)) ||
-				    (oldflp->saddr &&
-				    (!dn_dev_islocal(neigh->dev,
-						     oldflp->saddr)))) {
-					neigh_release(neigh);
-					neigh = NULL;
-				} else {
-					dev_put(dev_out);
-					if (dn_dev_islocal(neigh->dev, fld.daddr)) {
-						dev_out = init_net.loopback_dev;
-						res.type = RTN_LOCAL;
-					} else {
-						dev_out = neigh->dev;
-					}
-					dev_hold(dev_out);
-					goto select_source;
-				}
-			}
-		}
-
-		/* Not there? Perhaps its a local address */
-		if (dev_out == NULL)
-			dev_out = dn_dev_get_default();
-		err = -ENODEV;
-		if (dev_out == NULL)
-			goto out;
-		dn_db = rcu_dereference_raw(dev_out->dn_ptr);
-		if (!dn_db)
-			goto e_inval;
-		/* Possible improvement - check all devices for local addr */
-		if (dn_dev_islocal(dev_out, fld.daddr)) {
-			dev_put(dev_out);
-			dev_out = init_net.loopback_dev;
-			dev_hold(dev_out);
-			res.type = RTN_LOCAL;
-			goto select_source;
-		}
-		/* Not local either.... try sending it to the default router */
-		neigh = neigh_clone(dn_db->router);
-		BUG_ON(neigh && neigh->dev != dev_out);
-
-		/* Ok then, we assume its directly connected and move on */
-select_source:
-		if (neigh)
-			gateway = container_of(neigh, struct dn_neigh, n)->addr;
-		if (gateway == 0)
-			gateway = fld.daddr;
-		if (fld.saddr == 0) {
-			fld.saddr = dnet_select_source(dev_out, gateway,
-						       res.type == RTN_LOCAL ?
-						       RT_SCOPE_HOST :
-						       RT_SCOPE_LINK);
-			if (fld.saddr == 0 && res.type != RTN_LOCAL)
-				goto e_addr;
-		}
-		fld.flowidn_oif = dev_out->ifindex;
-		goto make_route;
-	}
-	free_res = 1;
-
-	if (res.type == RTN_NAT)
-		goto e_inval;
-
-	if (res.type == RTN_LOCAL) {
-		if (!fld.saddr)
-			fld.saddr = fld.daddr;
-		dev_put(dev_out);
-		dev_out = init_net.loopback_dev;
-		dev_hold(dev_out);
-		if (!dev_out->dn_ptr)
-			goto e_inval;
-		fld.flowidn_oif = dev_out->ifindex;
-		if (res.fi)
-			dn_fib_info_put(res.fi);
-		res.fi = NULL;
-		goto make_route;
-	}
-
-	if (res.fi->fib_nhs > 1 && fld.flowidn_oif == 0)
-		dn_fib_select_multipath(&fld, &res);
-
-	/*
-	 * We could add some logic to deal with default routes here and
-	 * get rid of some of the special casing above.
-	 */
-
-	if (!fld.saddr)
-		fld.saddr = DN_FIB_RES_PREFSRC(res);
-
-	dev_put(dev_out);
-	dev_out = DN_FIB_RES_DEV(res);
-	dev_hold(dev_out);
-	fld.flowidn_oif = dev_out->ifindex;
-	gateway = DN_FIB_RES_GW(res);
-
-make_route:
-	if (dev_out->flags & IFF_LOOPBACK)
-		flags |= RTCF_LOCAL;
-
-	rt = dst_alloc(&dn_dst_ops, dev_out, 0, DST_OBSOLETE_NONE, 0);
-	if (rt == NULL)
-		goto e_nobufs;
-
-	rt->dn_next = NULL;
-	memset(&rt->fld, 0, sizeof(rt->fld));
-	rt->fld.saddr        = oldflp->saddr;
-	rt->fld.daddr        = oldflp->daddr;
-	rt->fld.flowidn_oif  = oldflp->flowidn_oif;
-	rt->fld.flowidn_iif  = 0;
-	rt->fld.flowidn_mark = oldflp->flowidn_mark;
-
-	rt->rt_saddr      = fld.saddr;
-	rt->rt_daddr      = fld.daddr;
-	rt->rt_gateway    = gateway ? gateway : fld.daddr;
-	rt->rt_local_src  = fld.saddr;
-
-	rt->rt_dst_map    = fld.daddr;
-	rt->rt_src_map    = fld.saddr;
-
-	rt->n = neigh;
-	neigh = NULL;
-
-	rt->dst.lastuse = jiffies;
-	rt->dst.output  = dn_output;
-	rt->dst.input   = dn_rt_bug;
-	rt->rt_flags      = flags;
-	if (flags & RTCF_LOCAL)
-		rt->dst.input = dn_nsp_rx;
-
-	err = dn_rt_set_next_hop(rt, &res);
-	if (err)
-		goto e_neighbour;
-
-	hash = dn_hash(rt->fld.saddr, rt->fld.daddr);
-	/* dn_insert_route() increments dst->__refcnt */
-	dn_insert_route(rt, hash, (struct dn_route **)pprt);
-
-done:
-	if (neigh)
-		neigh_release(neigh);
-	if (free_res)
-		dn_fib_res_put(&res);
-	dev_put(dev_out);
-out:
-	return err;
-
-e_addr:
-	err = -EADDRNOTAVAIL;
-	goto done;
-e_inval:
-	err = -EINVAL;
-	goto done;
-e_nobufs:
-	err = -ENOBUFS;
-	goto done;
-e_neighbour:
-	dst_release_immediate(&rt->dst);
-	goto e_nobufs;
-}
-
-
-/*
- * N.B. The flags may be moved into the flowi at some future stage.
- */
-static int __dn_route_output_key(struct dst_entry **pprt, const struct flowidn *flp, int flags)
-{
-	unsigned int hash = dn_hash(flp->saddr, flp->daddr);
-	struct dn_route *rt = NULL;
-
-	if (!(flags & MSG_TRYHARD)) {
-		rcu_read_lock_bh();
-		for (rt = rcu_dereference_bh(dn_rt_hash_table[hash].chain); rt;
-			rt = rcu_dereference_bh(rt->dn_next)) {
-			if ((flp->daddr == rt->fld.daddr) &&
-			    (flp->saddr == rt->fld.saddr) &&
-			    (flp->flowidn_mark == rt->fld.flowidn_mark) &&
-			    dn_is_output_route(rt) &&
-			    (rt->fld.flowidn_oif == flp->flowidn_oif)) {
-				dst_hold_and_use(&rt->dst, jiffies);
-				rcu_read_unlock_bh();
-				*pprt = &rt->dst;
-				return 0;
-			}
-		}
-		rcu_read_unlock_bh();
-	}
-
-	return dn_route_output_slow(pprt, flp, flags);
-}
-
-static int dn_route_output_key(struct dst_entry **pprt, struct flowidn *flp, int flags)
-{
-	int err;
-
-	err = __dn_route_output_key(pprt, flp, flags);
-	if (err == 0 && flp->flowidn_proto) {
-		*pprt = xfrm_lookup(&init_net, *pprt,
-				    flowidn_to_flowi(flp), NULL, 0);
-		if (IS_ERR(*pprt)) {
-			err = PTR_ERR(*pprt);
-			*pprt = NULL;
-		}
-	}
-	return err;
-}
-
-int dn_route_output_sock(struct dst_entry __rcu **pprt, struct flowidn *fl, struct sock *sk, int flags)
-{
-	int err;
-
-	err = __dn_route_output_key(pprt, fl, flags & MSG_TRYHARD);
-	if (err == 0 && fl->flowidn_proto) {
-		*pprt = xfrm_lookup(&init_net, *pprt,
-				    flowidn_to_flowi(fl), sk, 0);
-		if (IS_ERR(*pprt)) {
-			err = PTR_ERR(*pprt);
-			*pprt = NULL;
-		}
-	}
-	return err;
-}
-
-static int dn_route_input_slow(struct sk_buff *skb)
-{
-	struct dn_route *rt = NULL;
-	struct dn_skb_cb *cb = DN_SKB_CB(skb);
-	struct net_device *in_dev = skb->dev;
-	struct net_device *out_dev = NULL;
-	struct dn_dev *dn_db;
-	struct neighbour *neigh = NULL;
-	unsigned int hash;
-	int flags = 0;
-	__le16 gateway = 0;
-	__le16 local_src = 0;
-	struct flowidn fld = {
-		.daddr = cb->dst,
-		.saddr = cb->src,
-		.flowidn_scope = RT_SCOPE_UNIVERSE,
-		.flowidn_mark = skb->mark,
-		.flowidn_iif = skb->dev->ifindex,
-	};
-	struct dn_fib_res res = { .fi = NULL, .type = RTN_UNREACHABLE };
-	int err = -EINVAL;
-	int free_res = 0;
-
-	dev_hold(in_dev);
-
-	dn_db = rcu_dereference(in_dev->dn_ptr);
-	if (!dn_db)
-		goto out;
-
-	/* Zero source addresses are not allowed */
-	if (fld.saddr == 0)
-		goto out;
-
-	/*
-	 * In this case we've just received a packet from a source
-	 * outside ourselves pretending to come from us. We don't
-	 * allow it any further to prevent routing loops, spoofing and
-	 * other nasties. Loopback packets already have the dst attached
-	 * so this only affects packets which have originated elsewhere.
-	 */
-	err  = -ENOTUNIQ;
-	if (dn_dev_islocal(in_dev, cb->src))
-		goto out;
-
-	err = dn_fib_lookup(&fld, &res);
-	if (err) {
-		if (err != -ESRCH)
-			goto out;
-		/*
-		 * Is the destination us ?
-		 */
-		if (!dn_dev_islocal(in_dev, cb->dst))
-			goto e_inval;
-
-		res.type = RTN_LOCAL;
-	} else {
-		__le16 src_map = fld.saddr;
-		free_res = 1;
-
-		out_dev = DN_FIB_RES_DEV(res);
-		if (out_dev == NULL) {
-			net_crit_ratelimited("Bug in dn_route_input_slow() No output device\n");
-			goto e_inval;
-		}
-		dev_hold(out_dev);
-
-		if (res.r)
-			src_map = fld.saddr; /* no NAT support for now */
-
-		gateway = DN_FIB_RES_GW(res);
-		if (res.type == RTN_NAT) {
-			fld.daddr = dn_fib_rules_map_destination(fld.daddr, &res);
-			dn_fib_res_put(&res);
-			free_res = 0;
-			if (dn_fib_lookup(&fld, &res))
-				goto e_inval;
-			free_res = 1;
-			if (res.type != RTN_UNICAST)
-				goto e_inval;
-			flags |= RTCF_DNAT;
-			gateway = fld.daddr;
-		}
-		fld.saddr = src_map;
-	}
-
-	switch (res.type) {
-	case RTN_UNICAST:
-		/*
-		 * Forwarding check here, we only check for forwarding
-		 * being turned off, if you want to only forward intra
-		 * area, its up to you to set the routing tables up
-		 * correctly.
-		 */
-		if (dn_db->parms.forwarding == 0)
-			goto e_inval;
-
-		if (res.fi->fib_nhs > 1 && fld.flowidn_oif == 0)
-			dn_fib_select_multipath(&fld, &res);
-
-		/*
-		 * Check for out_dev == in_dev. We use the RTCF_DOREDIRECT
-		 * flag as a hint to set the intra-ethernet bit when
-		 * forwarding. If we've got NAT in operation, we don't do
-		 * this optimisation.
-		 */
-		if (out_dev == in_dev && !(flags & RTCF_NAT))
-			flags |= RTCF_DOREDIRECT;
-
-		local_src = DN_FIB_RES_PREFSRC(res);
-		break;
-	case RTN_BLACKHOLE:
-	case RTN_UNREACHABLE:
-		break;
-	case RTN_LOCAL:
-		flags |= RTCF_LOCAL;
-		fld.saddr = cb->dst;
-		fld.daddr = cb->src;
-
-		/* Routing tables gave us a gateway */
-		if (gateway)
-			goto make_route;
-
-		/* Packet was intra-ethernet, so we know its on-link */
-		if (cb->rt_flags & DN_RT_F_IE) {
-			gateway = cb->src;
-			goto make_route;
-		}
-
-		/* Use the default router if there is one */
-		neigh = neigh_clone(dn_db->router);
-		if (neigh) {
-			gateway = container_of(neigh, struct dn_neigh, n)->addr;
-			goto make_route;
-		}
-
-		/* Close eyes and pray */
-		gateway = cb->src;
-		goto make_route;
-	default:
-		goto e_inval;
-	}
-
-make_route:
-	rt = dst_alloc(&dn_dst_ops, out_dev, 1, DST_OBSOLETE_NONE, 0);
-	if (rt == NULL)
-		goto e_nobufs;
-
-	rt->dn_next = NULL;
-	memset(&rt->fld, 0, sizeof(rt->fld));
-	rt->rt_saddr      = fld.saddr;
-	rt->rt_daddr      = fld.daddr;
-	rt->rt_gateway    = fld.daddr;
-	if (gateway)
-		rt->rt_gateway = gateway;
-	rt->rt_local_src  = local_src ? local_src : rt->rt_saddr;
-
-	rt->rt_dst_map    = fld.daddr;
-	rt->rt_src_map    = fld.saddr;
-
-	rt->fld.saddr        = cb->src;
-	rt->fld.daddr        = cb->dst;
-	rt->fld.flowidn_oif  = 0;
-	rt->fld.flowidn_iif  = in_dev->ifindex;
-	rt->fld.flowidn_mark = fld.flowidn_mark;
-
-	rt->n = neigh;
-	rt->dst.lastuse = jiffies;
-	rt->dst.output = dn_rt_bug_out;
-	switch (res.type) {
-	case RTN_UNICAST:
-		rt->dst.input = dn_forward;
-		break;
-	case RTN_LOCAL:
-		rt->dst.output = dn_output;
-		rt->dst.input = dn_nsp_rx;
-		rt->dst.dev = in_dev;
-		flags |= RTCF_LOCAL;
-		break;
-	default:
-	case RTN_UNREACHABLE:
-	case RTN_BLACKHOLE:
-		rt->dst.input = dst_discard;
-	}
-	rt->rt_flags = flags;
-
-	err = dn_rt_set_next_hop(rt, &res);
-	if (err)
-		goto e_neighbour;
-
-	hash = dn_hash(rt->fld.saddr, rt->fld.daddr);
-	/* dn_insert_route() increments dst->__refcnt */
-	dn_insert_route(rt, hash, &rt);
-	skb_dst_set(skb, &rt->dst);
-
-done:
-	if (neigh)
-		neigh_release(neigh);
-	if (free_res)
-		dn_fib_res_put(&res);
-	dev_put(in_dev);
-	dev_put(out_dev);
-out:
-	return err;
-
-e_inval:
-	err = -EINVAL;
-	goto done;
-
-e_nobufs:
-	err = -ENOBUFS;
-	goto done;
-
-e_neighbour:
-	dst_release_immediate(&rt->dst);
-	goto done;
-}
-
-static int dn_route_input(struct sk_buff *skb)
-{
-	struct dn_route *rt;
-	struct dn_skb_cb *cb = DN_SKB_CB(skb);
-	unsigned int hash = dn_hash(cb->src, cb->dst);
-
-	if (skb_dst(skb))
-		return 0;
-
-	rcu_read_lock();
-	for (rt = rcu_dereference(dn_rt_hash_table[hash].chain); rt != NULL;
-	    rt = rcu_dereference(rt->dn_next)) {
-		if ((rt->fld.saddr == cb->src) &&
-		    (rt->fld.daddr == cb->dst) &&
-		    (rt->fld.flowidn_oif == 0) &&
-		    (rt->fld.flowidn_mark == skb->mark) &&
-		    (rt->fld.flowidn_iif == cb->iif)) {
-			dst_hold_and_use(&rt->dst, jiffies);
-			rcu_read_unlock();
-			skb_dst_set(skb, (struct dst_entry *)rt);
-			return 0;
-		}
-	}
-	rcu_read_unlock();
-
-	return dn_route_input_slow(skb);
-}
-
-static int dn_rt_fill_info(struct sk_buff *skb, u32 portid, u32 seq,
-			   int event, int nowait, unsigned int flags)
-{
-	struct dn_route *rt = (struct dn_route *)skb_dst(skb);
-	struct rtmsg *r;
-	struct nlmsghdr *nlh;
-	long expires;
-
-	nlh = nlmsg_put(skb, portid, seq, event, sizeof(*r), flags);
-	if (!nlh)
-		return -EMSGSIZE;
-
-	r = nlmsg_data(nlh);
-	r->rtm_family = AF_DECnet;
-	r->rtm_dst_len = 16;
-	r->rtm_src_len = 0;
-	r->rtm_tos = 0;
-	r->rtm_table = RT_TABLE_MAIN;
-	r->rtm_type = rt->rt_type;
-	r->rtm_flags = (rt->rt_flags & ~0xFFFF) | RTM_F_CLONED;
-	r->rtm_scope = RT_SCOPE_UNIVERSE;
-	r->rtm_protocol = RTPROT_UNSPEC;
-
-	if (rt->rt_flags & RTCF_NOTIFY)
-		r->rtm_flags |= RTM_F_NOTIFY;
-
-	if (nla_put_u32(skb, RTA_TABLE, RT_TABLE_MAIN) < 0 ||
-	    nla_put_le16(skb, RTA_DST, rt->rt_daddr) < 0)
-		goto errout;
-
-	if (rt->fld.saddr) {
-		r->rtm_src_len = 16;
-		if (nla_put_le16(skb, RTA_SRC, rt->fld.saddr) < 0)
-			goto errout;
-	}
-	if (rt->dst.dev &&
-	    nla_put_u32(skb, RTA_OIF, rt->dst.dev->ifindex) < 0)
-		goto errout;
-
-	/*
-	 * Note to self - change this if input routes reverse direction when
-	 * they deal only with inputs and not with replies like they do
-	 * currently.
-	 */
-	if (nla_put_le16(skb, RTA_PREFSRC, rt->rt_local_src) < 0)
-		goto errout;
-
-	if (rt->rt_daddr != rt->rt_gateway &&
-	    nla_put_le16(skb, RTA_GATEWAY, rt->rt_gateway) < 0)
-		goto errout;
-
-	if (rtnetlink_put_metrics(skb, dst_metrics_ptr(&rt->dst)) < 0)
-		goto errout;
-
-	expires = rt->dst.expires ? rt->dst.expires - jiffies : 0;
-	if (rtnl_put_cacheinfo(skb, &rt->dst, 0, expires,
-			       rt->dst.error) < 0)
-		goto errout;
-
-	if (dn_is_input_route(rt) &&
-	    nla_put_u32(skb, RTA_IIF, rt->fld.flowidn_iif) < 0)
-		goto errout;
-
-	nlmsg_end(skb, nlh);
-	return 0;
-
-errout:
-	nlmsg_cancel(skb, nlh);
-	return -EMSGSIZE;
-}
-
-const struct nla_policy rtm_dn_policy[RTA_MAX + 1] = {
-	[RTA_DST]		= { .type = NLA_U16 },
-	[RTA_SRC]		= { .type = NLA_U16 },
-	[RTA_IIF]		= { .type = NLA_U32 },
-	[RTA_OIF]		= { .type = NLA_U32 },
-	[RTA_GATEWAY]		= { .type = NLA_U16 },
-	[RTA_PRIORITY]		= { .type = NLA_U32 },
-	[RTA_PREFSRC]		= { .type = NLA_U16 },
-	[RTA_METRICS]		= { .type = NLA_NESTED },
-	[RTA_MULTIPATH]		= { .type = NLA_NESTED },
-	[RTA_TABLE]		= { .type = NLA_U32 },
-	[RTA_MARK]		= { .type = NLA_U32 },
-};
-
-/*
- * This is called by both endnodes and routers now.
- */
-static int dn_cache_getroute(struct sk_buff *in_skb, struct nlmsghdr *nlh,
-			     struct netlink_ext_ack *extack)
-{
-	struct net *net = sock_net(in_skb->sk);
-	struct rtmsg *rtm = nlmsg_data(nlh);
-	struct dn_route *rt = NULL;
-	struct dn_skb_cb *cb;
-	int err;
-	struct sk_buff *skb;
-	struct flowidn fld;
-	struct nlattr *tb[RTA_MAX+1];
-
-	if (!net_eq(net, &init_net))
-		return -EINVAL;
-
-	err = nlmsg_parse_deprecated(nlh, sizeof(*rtm), tb, RTA_MAX,
-				     rtm_dn_policy, extack);
-	if (err < 0)
-		return err;
-
-	memset(&fld, 0, sizeof(fld));
-	fld.flowidn_proto = DNPROTO_NSP;
-
-	skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
-	if (skb == NULL)
-		return -ENOBUFS;
-	skb_reset_mac_header(skb);
-	cb = DN_SKB_CB(skb);
-
-	if (tb[RTA_SRC])
-		fld.saddr = nla_get_le16(tb[RTA_SRC]);
-
-	if (tb[RTA_DST])
-		fld.daddr = nla_get_le16(tb[RTA_DST]);
-
-	if (tb[RTA_IIF])
-		fld.flowidn_iif = nla_get_u32(tb[RTA_IIF]);
-
-	if (fld.flowidn_iif) {
-		struct net_device *dev;
-		dev = __dev_get_by_index(&init_net, fld.flowidn_iif);
-		if (!dev || !dev->dn_ptr) {
-			kfree_skb(skb);
-			return -ENODEV;
-		}
-		skb->protocol = htons(ETH_P_DNA_RT);
-		skb->dev = dev;
-		cb->src = fld.saddr;
-		cb->dst = fld.daddr;
-		local_bh_disable();
-		err = dn_route_input(skb);
-		local_bh_enable();
-		memset(cb, 0, sizeof(struct dn_skb_cb));
-		rt = (struct dn_route *)skb_dst(skb);
-		if (!err && -rt->dst.error)
-			err = rt->dst.error;
-	} else {
-		if (tb[RTA_OIF])
-			fld.flowidn_oif = nla_get_u32(tb[RTA_OIF]);
-
-		err = dn_route_output_key((struct dst_entry **)&rt, &fld, 0);
-	}
-
-	skb->dev = NULL;
-	if (err)
-		goto out_free;
-	skb_dst_set(skb, &rt->dst);
-	if (rtm->rtm_flags & RTM_F_NOTIFY)
-		rt->rt_flags |= RTCF_NOTIFY;
-
-	err = dn_rt_fill_info(skb, NETLINK_CB(in_skb).portid, nlh->nlmsg_seq, RTM_NEWROUTE, 0, 0);
-	if (err < 0) {
-		err = -EMSGSIZE;
-		goto out_free;
-	}
-
-	return rtnl_unicast(skb, &init_net, NETLINK_CB(in_skb).portid);
-
-out_free:
-	kfree_skb(skb);
-	return err;
-}
-
-/*
- * For routers, this is called from dn_fib_dump, but for endnodes its
- * called directly from the rtnetlink dispatch table.
- */
-int dn_cache_dump(struct sk_buff *skb, struct netlink_callback *cb)
-{
-	struct net *net = sock_net(skb->sk);
-	struct dn_route *rt;
-	int h, s_h;
-	int idx, s_idx;
-	struct rtmsg *rtm;
-
-	if (!net_eq(net, &init_net))
-		return 0;
-
-	if (nlmsg_len(cb->nlh) < sizeof(struct rtmsg))
-		return -EINVAL;
-
-	rtm = nlmsg_data(cb->nlh);
-	if (!(rtm->rtm_flags & RTM_F_CLONED))
-		return 0;
-
-	s_h = cb->args[0];
-	s_idx = idx = cb->args[1];
-	for (h = 0; h <= dn_rt_hash_mask; h++) {
-		if (h < s_h)
-			continue;
-		if (h > s_h)
-			s_idx = 0;
-		rcu_read_lock_bh();
-		for (rt = rcu_dereference_bh(dn_rt_hash_table[h].chain), idx = 0;
-			rt;
-			rt = rcu_dereference_bh(rt->dn_next), idx++) {
-			if (idx < s_idx)
-				continue;
-			skb_dst_set(skb, dst_clone(&rt->dst));
-			if (dn_rt_fill_info(skb, NETLINK_CB(cb->skb).portid,
-					cb->nlh->nlmsg_seq, RTM_NEWROUTE,
-					1, NLM_F_MULTI) < 0) {
-				skb_dst_drop(skb);
-				rcu_read_unlock_bh();
-				goto done;
-			}
-			skb_dst_drop(skb);
-		}
-		rcu_read_unlock_bh();
-	}
-
-done:
-	cb->args[0] = h;
-	cb->args[1] = idx;
-	return skb->len;
-}
-
-#ifdef CONFIG_PROC_FS
-struct dn_rt_cache_iter_state {
-	int bucket;
-};
-
-static struct dn_route *dn_rt_cache_get_first(struct seq_file *seq)
-{
-	struct dn_route *rt = NULL;
-	struct dn_rt_cache_iter_state *s = seq->private;
-
-	for (s->bucket = dn_rt_hash_mask; s->bucket >= 0; --s->bucket) {
-		rcu_read_lock_bh();
-		rt = rcu_dereference_bh(dn_rt_hash_table[s->bucket].chain);
-		if (rt)
-			break;
-		rcu_read_unlock_bh();
-	}
-	return rt;
-}
-
-static struct dn_route *dn_rt_cache_get_next(struct seq_file *seq, struct dn_route *rt)
-{
-	struct dn_rt_cache_iter_state *s = seq->private;
-
-	rt = rcu_dereference_bh(rt->dn_next);
-	while (!rt) {
-		rcu_read_unlock_bh();
-		if (--s->bucket < 0)
-			break;
-		rcu_read_lock_bh();
-		rt = rcu_dereference_bh(dn_rt_hash_table[s->bucket].chain);
-	}
-	return rt;
-}
-
-static void *dn_rt_cache_seq_start(struct seq_file *seq, loff_t *pos)
-{
-	struct dn_route *rt = dn_rt_cache_get_first(seq);
-
-	if (rt) {
-		while (*pos && (rt = dn_rt_cache_get_next(seq, rt)))
-			--*pos;
-	}
-	return *pos ? NULL : rt;
-}
-
-static void *dn_rt_cache_seq_next(struct seq_file *seq, void *v, loff_t *pos)
-{
-	struct dn_route *rt = dn_rt_cache_get_next(seq, v);
-	++*pos;
-	return rt;
-}
-
-static void dn_rt_cache_seq_stop(struct seq_file *seq, void *v)
-{
-	if (v)
-		rcu_read_unlock_bh();
-}
-
-static int dn_rt_cache_seq_show(struct seq_file *seq, void *v)
-{
-	struct dn_route *rt = v;
-	char buf1[DN_ASCBUF_LEN], buf2[DN_ASCBUF_LEN];
-
-	seq_printf(seq, "%-8s %-7s %-7s %04d %04d %04d\n",
-		   rt->dst.dev ? rt->dst.dev->name : "*",
-		   dn_addr2asc(le16_to_cpu(rt->rt_daddr), buf1),
-		   dn_addr2asc(le16_to_cpu(rt->rt_saddr), buf2),
-		   atomic_read(&rt->dst.__refcnt),
-		   rt->dst.__use, 0);
-	return 0;
-}
-
-static const struct seq_operations dn_rt_cache_seq_ops = {
-	.start	= dn_rt_cache_seq_start,
-	.next	= dn_rt_cache_seq_next,
-	.stop	= dn_rt_cache_seq_stop,
-	.show	= dn_rt_cache_seq_show,
-};
-#endif /* CONFIG_PROC_FS */
-
-void __init dn_route_init(void)
-{
-	int i, goal, order;
-
-	dn_dst_ops.kmem_cachep =
-		kmem_cache_create("dn_dst_cache", sizeof(struct dn_route), 0,
-				  SLAB_HWCACHE_ALIGN|SLAB_PANIC, NULL);
-	dst_entries_init(&dn_dst_ops);
-	timer_setup(&dn_route_timer, dn_dst_check_expire, 0);
-	dn_route_timer.expires = jiffies + decnet_dst_gc_interval * HZ;
-	add_timer(&dn_route_timer);
-
-	goal = totalram_pages() >> (26 - PAGE_SHIFT);
-
-	for (order = 0; (1UL << order) < goal; order++)
-		/* NOTHING */;
-
-	/*
-	 * Only want 1024 entries max, since the table is very, very unlikely
-	 * to be larger than that.
-	 */
-	while (order && ((((1UL << order) * PAGE_SIZE) /
-				sizeof(struct dn_rt_hash_bucket)) >= 2048))
-		order--;
-
-	do {
-		dn_rt_hash_mask = (1UL << order) * PAGE_SIZE /
-			sizeof(struct dn_rt_hash_bucket);
-		while (dn_rt_hash_mask & (dn_rt_hash_mask - 1))
-			dn_rt_hash_mask--;
-		dn_rt_hash_table = (struct dn_rt_hash_bucket *)
-			__get_free_pages(GFP_ATOMIC, order);
-	} while (dn_rt_hash_table == NULL && --order > 0);
-
-	if (!dn_rt_hash_table)
-		panic("Failed to allocate DECnet route cache hash table\n");
-
-	printk(KERN_INFO
-		"DECnet: Routing cache hash table of %u buckets, %ldKbytes\n",
-		dn_rt_hash_mask,
-		(long)(dn_rt_hash_mask*sizeof(struct dn_rt_hash_bucket))/1024);
-
-	dn_rt_hash_mask--;
-	for (i = 0; i <= dn_rt_hash_mask; i++) {
-		spin_lock_init(&dn_rt_hash_table[i].lock);
-		dn_rt_hash_table[i].chain = NULL;
-	}
-
-	dn_dst_ops.gc_thresh = (dn_rt_hash_mask + 1);
-
-	proc_create_seq_private("decnet_cache", 0444, init_net.proc_net,
-			&dn_rt_cache_seq_ops,
-			sizeof(struct dn_rt_cache_iter_state), NULL);
-
-#ifdef CONFIG_DECNET_ROUTER
-	rtnl_register_module(THIS_MODULE, PF_DECnet, RTM_GETROUTE,
-			     dn_cache_getroute, dn_fib_dump, 0);
-#else
-	rtnl_register_module(THIS_MODULE, PF_DECnet, RTM_GETROUTE,
-			     dn_cache_getroute, dn_cache_dump, 0);
-#endif
-}
-
-void __exit dn_route_cleanup(void)
-{
-	del_timer(&dn_route_timer);
-	dn_run_flush(NULL);
-
-	remove_proc_entry("decnet_cache", init_net.proc_net);
-	dst_entries_destroy(&dn_dst_ops);
-}
diff --git a/net/decnet/dn_rules.c b/net/decnet/dn_rules.c
deleted file mode 100644
index ee73057529cf..000000000000
--- a/net/decnet/dn_rules.c
+++ /dev/null
@@ -1,253 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-
-/*
- * 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 Routing Forwarding Information Base (Rules)
- *
- * Author:      Steve Whitehouse <SteveW@ACM.org>
- *              Mostly copied from Alexey Kuznetsov's ipv4/fib_rules.c
- *
- *
- * Changes:
- *              Steve Whitehouse <steve@chygwyn.com>
- *              Updated for Thomas Graf's generic rules
- *
- */
-#include <linux/net.h>
-#include <linux/init.h>
-#include <linux/netlink.h>
-#include <linux/rtnetlink.h>
-#include <linux/netdevice.h>
-#include <linux/spinlock.h>
-#include <linux/list.h>
-#include <linux/rcupdate.h>
-#include <linux/export.h>
-#include <net/neighbour.h>
-#include <net/dst.h>
-#include <net/flow.h>
-#include <net/fib_rules.h>
-#include <net/dn.h>
-#include <net/dn_fib.h>
-#include <net/dn_neigh.h>
-#include <net/dn_dev.h>
-#include <net/dn_route.h>
-
-static struct fib_rules_ops *dn_fib_rules_ops;
-
-struct dn_fib_rule
-{
-	struct fib_rule		common;
-	unsigned char		dst_len;
-	unsigned char		src_len;
-	__le16			src;
-	__le16			srcmask;
-	__le16			dst;
-	__le16			dstmask;
-	__le16			srcmap;
-	u8			flags;
-};
-
-
-int dn_fib_lookup(struct flowidn *flp, struct dn_fib_res *res)
-{
-	struct fib_lookup_arg arg = {
-		.result = res,
-	};
-	int err;
-
-	err = fib_rules_lookup(dn_fib_rules_ops,
-			       flowidn_to_flowi(flp), 0, &arg);
-	res->r = arg.rule;
-
-	return err;
-}
-
-static int dn_fib_rule_action(struct fib_rule *rule, struct flowi *flp,
-			      int flags, struct fib_lookup_arg *arg)
-{
-	struct flowidn *fld = &flp->u.dn;
-	int err = -EAGAIN;
-	struct dn_fib_table *tbl;
-
-	switch(rule->action) {
-	case FR_ACT_TO_TBL:
-		break;
-
-	case FR_ACT_UNREACHABLE:
-		err = -ENETUNREACH;
-		goto errout;
-
-	case FR_ACT_PROHIBIT:
-		err = -EACCES;
-		goto errout;
-
-	case FR_ACT_BLACKHOLE:
-	default:
-		err = -EINVAL;
-		goto errout;
-	}
-
-	tbl = dn_fib_get_table(rule->table, 0);
-	if (tbl == NULL)
-		goto errout;
-
-	err = tbl->lookup(tbl, fld, (struct dn_fib_res *)arg->result);
-	if (err > 0)
-		err = -EAGAIN;
-errout:
-	return err;
-}
-
-static int dn_fib_rule_match(struct fib_rule *rule, struct flowi *fl, int flags)
-{
-	struct dn_fib_rule *r = (struct dn_fib_rule *)rule;
-	struct flowidn *fld = &fl->u.dn;
-	__le16 daddr = fld->daddr;
-	__le16 saddr = fld->saddr;
-
-	if (((saddr ^ r->src) & r->srcmask) ||
-	    ((daddr ^ r->dst) & r->dstmask))
-		return 0;
-
-	return 1;
-}
-
-static int dn_fib_rule_configure(struct fib_rule *rule, struct sk_buff *skb,
-				 struct fib_rule_hdr *frh,
-				 struct nlattr **tb,
-				 struct netlink_ext_ack *extack)
-{
-	int err = -EINVAL;
-	struct dn_fib_rule *r = (struct dn_fib_rule *)rule;
-
-	if (frh->tos) {
-		NL_SET_ERR_MSG(extack, "Invalid tos value");
-		goto  errout;
-	}
-
-	if (rule->table == RT_TABLE_UNSPEC) {
-		if (rule->action == FR_ACT_TO_TBL) {
-			struct dn_fib_table *table;
-
-			table = dn_fib_empty_table();
-			if (table == NULL) {
-				err = -ENOBUFS;
-				goto errout;
-			}
-
-			rule->table = table->n;
-		}
-	}
-
-	if (frh->src_len)
-		r->src = nla_get_le16(tb[FRA_SRC]);
-
-	if (frh->dst_len)
-		r->dst = nla_get_le16(tb[FRA_DST]);
-
-	r->src_len = frh->src_len;
-	r->srcmask = dnet_make_mask(r->src_len);
-	r->dst_len = frh->dst_len;
-	r->dstmask = dnet_make_mask(r->dst_len);
-	err = 0;
-errout:
-	return err;
-}
-
-static int dn_fib_rule_compare(struct fib_rule *rule, struct fib_rule_hdr *frh,
-			       struct nlattr **tb)
-{
-	struct dn_fib_rule *r = (struct dn_fib_rule *)rule;
-
-	if (frh->src_len && (r->src_len != frh->src_len))
-		return 0;
-
-	if (frh->dst_len && (r->dst_len != frh->dst_len))
-		return 0;
-
-	if (frh->src_len && (r->src != nla_get_le16(tb[FRA_SRC])))
-		return 0;
-
-	if (frh->dst_len && (r->dst != nla_get_le16(tb[FRA_DST])))
-		return 0;
-
-	return 1;
-}
-
-unsigned int dnet_addr_type(__le16 addr)
-{
-	struct flowidn fld = { .daddr = addr };
-	struct dn_fib_res res;
-	unsigned int ret = RTN_UNICAST;
-	struct dn_fib_table *tb = dn_fib_get_table(RT_TABLE_LOCAL, 0);
-
-	res.r = NULL;
-
-	if (tb) {
-		if (!tb->lookup(tb, &fld, &res)) {
-			ret = res.type;
-			dn_fib_res_put(&res);
-		}
-	}
-	return ret;
-}
-
-static int dn_fib_rule_fill(struct fib_rule *rule, struct sk_buff *skb,
-			    struct fib_rule_hdr *frh)
-{
-	struct dn_fib_rule *r = (struct dn_fib_rule *)rule;
-
-	frh->dst_len = r->dst_len;
-	frh->src_len = r->src_len;
-	frh->tos = 0;
-
-	if ((r->dst_len &&
-	     nla_put_le16(skb, FRA_DST, r->dst)) ||
-	    (r->src_len &&
-	     nla_put_le16(skb, FRA_SRC, r->src)))
-		goto nla_put_failure;
-	return 0;
-
-nla_put_failure:
-	return -ENOBUFS;
-}
-
-static void dn_fib_rule_flush_cache(struct fib_rules_ops *ops)
-{
-	dn_rt_cache_flush(-1);
-}
-
-static const struct fib_rules_ops __net_initconst dn_fib_rules_ops_template = {
-	.family		= AF_DECnet,
-	.rule_size	= sizeof(struct dn_fib_rule),
-	.addr_size	= sizeof(u16),
-	.action		= dn_fib_rule_action,
-	.match		= dn_fib_rule_match,
-	.configure	= dn_fib_rule_configure,
-	.compare	= dn_fib_rule_compare,
-	.fill		= dn_fib_rule_fill,
-	.flush_cache	= dn_fib_rule_flush_cache,
-	.nlgroup	= RTNLGRP_DECnet_RULE,
-	.owner		= THIS_MODULE,
-	.fro_net	= &init_net,
-};
-
-void __init dn_fib_rules_init(void)
-{
-	dn_fib_rules_ops =
-		fib_rules_register(&dn_fib_rules_ops_template, &init_net);
-	BUG_ON(IS_ERR(dn_fib_rules_ops));
-	BUG_ON(fib_default_rule_add(dn_fib_rules_ops, 0x7fff,
-			            RT_TABLE_MAIN, 0));
-}
-
-void __exit dn_fib_rules_cleanup(void)
-{
-	rtnl_lock();
-	fib_rules_unregister(dn_fib_rules_ops);
-	rtnl_unlock();
-	rcu_barrier();
-}
diff --git a/net/decnet/dn_table.c b/net/decnet/dn_table.c
deleted file mode 100644
index 4086f9c746af..000000000000
--- a/net/decnet/dn_table.c
+++ /dev/null
@@ -1,929 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * 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 Routing Forwarding Information Base (Routing Tables)
- *
- * Author:      Steve Whitehouse <SteveW@ACM.org>
- *              Mostly copied from the IPv4 routing code
- *
- *
- * Changes:
- *
- */
-#include <linux/string.h>
-#include <linux/net.h>
-#include <linux/socket.h>
-#include <linux/slab.h>
-#include <linux/sockios.h>
-#include <linux/init.h>
-#include <linux/skbuff.h>
-#include <linux/rtnetlink.h>
-#include <linux/proc_fs.h>
-#include <linux/netdevice.h>
-#include <linux/timer.h>
-#include <linux/spinlock.h>
-#include <linux/atomic.h>
-#include <linux/uaccess.h>
-#include <linux/route.h> /* RTF_xxx */
-#include <net/neighbour.h>
-#include <net/netlink.h>
-#include <net/tcp.h>
-#include <net/dst.h>
-#include <net/flow.h>
-#include <net/fib_rules.h>
-#include <net/dn.h>
-#include <net/dn_route.h>
-#include <net/dn_fib.h>
-#include <net/dn_neigh.h>
-#include <net/dn_dev.h>
-
-struct dn_zone
-{
-	struct dn_zone		*dz_next;
-	struct dn_fib_node 	**dz_hash;
-	int			dz_nent;
-	int			dz_divisor;
-	u32			dz_hashmask;
-#define DZ_HASHMASK(dz)	((dz)->dz_hashmask)
-	int			dz_order;
-	__le16			dz_mask;
-#define DZ_MASK(dz)	((dz)->dz_mask)
-};
-
-struct dn_hash
-{
-	struct dn_zone	*dh_zones[17];
-	struct dn_zone	*dh_zone_list;
-};
-
-#define dz_key_0(key)		((key).datum = 0)
-
-#define for_nexthops(fi) { int nhsel; const struct dn_fib_nh *nh;\
-	for(nhsel = 0, nh = (fi)->fib_nh; nhsel < (fi)->fib_nhs; nh++, nhsel++)
-
-#define endfor_nexthops(fi) }
-
-#define DN_MAX_DIVISOR 1024
-#define DN_S_ZOMBIE 1
-#define DN_S_ACCESSED 2
-
-#define DN_FIB_SCAN(f, fp) \
-for( ; ((f) = *(fp)) != NULL; (fp) = &(f)->fn_next)
-
-#define DN_FIB_SCAN_KEY(f, fp, key) \
-for( ; ((f) = *(fp)) != NULL && dn_key_eq((f)->fn_key, (key)); (fp) = &(f)->fn_next)
-
-#define RT_TABLE_MIN 1
-#define DN_FIB_TABLE_HASHSZ 256
-static struct hlist_head dn_fib_table_hash[DN_FIB_TABLE_HASHSZ];
-static DEFINE_RWLOCK(dn_fib_tables_lock);
-
-static struct kmem_cache *dn_hash_kmem __read_mostly;
-static int dn_fib_hash_zombies;
-
-static inline dn_fib_idx_t dn_hash(dn_fib_key_t key, struct dn_zone *dz)
-{
-	u16 h = le16_to_cpu(key.datum)>>(16 - dz->dz_order);
-	h ^= (h >> 10);
-	h ^= (h >> 6);
-	h &= DZ_HASHMASK(dz);
-	return *(dn_fib_idx_t *)&h;
-}
-
-static inline dn_fib_key_t dz_key(__le16 dst, struct dn_zone *dz)
-{
-	dn_fib_key_t k;
-	k.datum = dst & DZ_MASK(dz);
-	return k;
-}
-
-static inline struct dn_fib_node **dn_chain_p(dn_fib_key_t key, struct dn_zone *dz)
-{
-	return &dz->dz_hash[dn_hash(key, dz).datum];
-}
-
-static inline struct dn_fib_node *dz_chain(dn_fib_key_t key, struct dn_zone *dz)
-{
-	return dz->dz_hash[dn_hash(key, dz).datum];
-}
-
-static inline int dn_key_eq(dn_fib_key_t a, dn_fib_key_t b)
-{
-	return a.datum == b.datum;
-}
-
-static inline int dn_key_leq(dn_fib_key_t a, dn_fib_key_t b)
-{
-	return a.datum <= b.datum;
-}
-
-static inline void dn_rebuild_zone(struct dn_zone *dz,
-				   struct dn_fib_node **old_ht,
-				   int old_divisor)
-{
-	struct dn_fib_node *f, **fp, *next;
-	int i;
-
-	for(i = 0; i < old_divisor; i++) {
-		for(f = old_ht[i]; f; f = next) {
-			next = f->fn_next;
-			for(fp = dn_chain_p(f->fn_key, dz);
-				*fp && dn_key_leq((*fp)->fn_key, f->fn_key);
-				fp = &(*fp)->fn_next)
-				/* NOTHING */;
-			f->fn_next = *fp;
-			*fp = f;
-		}
-	}
-}
-
-static void dn_rehash_zone(struct dn_zone *dz)
-{
-	struct dn_fib_node **ht, **old_ht;
-	int old_divisor, new_divisor;
-	u32 new_hashmask;
-
-	old_divisor = dz->dz_divisor;
-
-	switch (old_divisor) {
-	case 16:
-		new_divisor = 256;
-		new_hashmask = 0xFF;
-		break;
-	default:
-		printk(KERN_DEBUG "DECnet: dn_rehash_zone: BUG! %d\n",
-		       old_divisor);
-		fallthrough;
-	case 256:
-		new_divisor = 1024;
-		new_hashmask = 0x3FF;
-		break;
-	}
-
-	ht = kcalloc(new_divisor, sizeof(struct dn_fib_node*), GFP_KERNEL);
-	if (ht == NULL)
-		return;
-
-	write_lock_bh(&dn_fib_tables_lock);
-	old_ht = dz->dz_hash;
-	dz->dz_hash = ht;
-	dz->dz_hashmask = new_hashmask;
-	dz->dz_divisor = new_divisor;
-	dn_rebuild_zone(dz, old_ht, old_divisor);
-	write_unlock_bh(&dn_fib_tables_lock);
-	kfree(old_ht);
-}
-
-static void dn_free_node(struct dn_fib_node *f)
-{
-	dn_fib_release_info(DN_FIB_INFO(f));
-	kmem_cache_free(dn_hash_kmem, f);
-}
-
-
-static struct dn_zone *dn_new_zone(struct dn_hash *table, int z)
-{
-	int i;
-	struct dn_zone *dz = kzalloc(sizeof(struct dn_zone), GFP_KERNEL);
-	if (!dz)
-		return NULL;
-
-	if (z) {
-		dz->dz_divisor = 16;
-		dz->dz_hashmask = 0x0F;
-	} else {
-		dz->dz_divisor = 1;
-		dz->dz_hashmask = 0;
-	}
-
-	dz->dz_hash = kcalloc(dz->dz_divisor, sizeof(struct dn_fib_node *), GFP_KERNEL);
-	if (!dz->dz_hash) {
-		kfree(dz);
-		return NULL;
-	}
-
-	dz->dz_order = z;
-	dz->dz_mask = dnet_make_mask(z);
-
-	for(i = z + 1; i <= 16; i++)
-		if (table->dh_zones[i])
-			break;
-
-	write_lock_bh(&dn_fib_tables_lock);
-	if (i>16) {
-		dz->dz_next = table->dh_zone_list;
-		table->dh_zone_list = dz;
-	} else {
-		dz->dz_next = table->dh_zones[i]->dz_next;
-		table->dh_zones[i]->dz_next = dz;
-	}
-	table->dh_zones[z] = dz;
-	write_unlock_bh(&dn_fib_tables_lock);
-	return dz;
-}
-
-
-static int dn_fib_nh_match(struct rtmsg *r, struct nlmsghdr *nlh, struct nlattr *attrs[], struct dn_fib_info *fi)
-{
-	struct rtnexthop *nhp;
-	int nhlen;
-
-	if (attrs[RTA_PRIORITY] &&
-	    nla_get_u32(attrs[RTA_PRIORITY]) != fi->fib_priority)
-		return 1;
-
-	if (attrs[RTA_OIF] || attrs[RTA_GATEWAY]) {
-		if ((!attrs[RTA_OIF] || nla_get_u32(attrs[RTA_OIF]) == fi->fib_nh->nh_oif) &&
-		    (!attrs[RTA_GATEWAY]  || nla_get_le16(attrs[RTA_GATEWAY]) != fi->fib_nh->nh_gw))
-			return 0;
-		return 1;
-	}
-
-	if (!attrs[RTA_MULTIPATH])
-		return 0;
-
-	nhp = nla_data(attrs[RTA_MULTIPATH]);
-	nhlen = nla_len(attrs[RTA_MULTIPATH]);
-
-	for_nexthops(fi) {
-		int attrlen = nhlen - sizeof(struct rtnexthop);
-		__le16 gw;
-
-		if (attrlen < 0 || (nhlen -= nhp->rtnh_len) < 0)
-			return -EINVAL;
-		if (nhp->rtnh_ifindex && nhp->rtnh_ifindex != nh->nh_oif)
-			return 1;
-		if (attrlen) {
-			struct nlattr *gw_attr;
-
-			gw_attr = nla_find((struct nlattr *) (nhp + 1), attrlen, RTA_GATEWAY);
-			gw = gw_attr ? nla_get_le16(gw_attr) : 0;
-
-			if (gw && gw != nh->nh_gw)
-				return 1;
-		}
-		nhp = RTNH_NEXT(nhp);
-	} endfor_nexthops(fi);
-
-	return 0;
-}
-
-static inline size_t dn_fib_nlmsg_size(struct dn_fib_info *fi)
-{
-	size_t payload = NLMSG_ALIGN(sizeof(struct rtmsg))
-			 + nla_total_size(4) /* RTA_TABLE */
-			 + nla_total_size(2) /* RTA_DST */
-			 + nla_total_size(4) /* RTA_PRIORITY */
-			 + nla_total_size(TCP_CA_NAME_MAX); /* RTAX_CC_ALGO */
-
-	/* space for nested metrics */
-	payload += nla_total_size((RTAX_MAX * nla_total_size(4)));
-
-	if (fi->fib_nhs) {
-		/* Also handles the special case fib_nhs == 1 */
-
-		/* each nexthop is packed in an attribute */
-		size_t nhsize = nla_total_size(sizeof(struct rtnexthop));
-
-		/* may contain a gateway attribute */
-		nhsize += nla_total_size(4);
-
-		/* all nexthops are packed in a nested attribute */
-		payload += nla_total_size(fi->fib_nhs * nhsize);
-	}
-
-	return payload;
-}
-
-static int dn_fib_dump_info(struct sk_buff *skb, u32 portid, u32 seq, int event,
-			u32 tb_id, u8 type, u8 scope, void *dst, int dst_len,
-			struct dn_fib_info *fi, unsigned int flags)
-{
-	struct rtmsg *rtm;
-	struct nlmsghdr *nlh;
-
-	nlh = nlmsg_put(skb, portid, seq, event, sizeof(*rtm), flags);
-	if (!nlh)
-		return -EMSGSIZE;
-
-	rtm = nlmsg_data(nlh);
-	rtm->rtm_family = AF_DECnet;
-	rtm->rtm_dst_len = dst_len;
-	rtm->rtm_src_len = 0;
-	rtm->rtm_tos = 0;
-	rtm->rtm_table = tb_id;
-	rtm->rtm_flags = fi->fib_flags;
-	rtm->rtm_scope = scope;
-	rtm->rtm_type  = type;
-	rtm->rtm_protocol = fi->fib_protocol;
-
-	if (nla_put_u32(skb, RTA_TABLE, tb_id) < 0)
-		goto errout;
-
-	if (rtm->rtm_dst_len &&
-	    nla_put(skb, RTA_DST, 2, dst) < 0)
-		goto errout;
-
-	if (fi->fib_priority &&
-	    nla_put_u32(skb, RTA_PRIORITY, fi->fib_priority) < 0)
-		goto errout;
-
-	if (rtnetlink_put_metrics(skb, fi->fib_metrics) < 0)
-		goto errout;
-
-	if (fi->fib_nhs == 1) {
-		if (fi->fib_nh->nh_gw &&
-		    nla_put_le16(skb, RTA_GATEWAY, fi->fib_nh->nh_gw) < 0)
-			goto errout;
-
-		if (fi->fib_nh->nh_oif &&
-		    nla_put_u32(skb, RTA_OIF, fi->fib_nh->nh_oif) < 0)
-			goto errout;
-	}
-
-	if (fi->fib_nhs > 1) {
-		struct rtnexthop *nhp;
-		struct nlattr *mp_head;
-
-		mp_head = nla_nest_start_noflag(skb, RTA_MULTIPATH);
-		if (!mp_head)
-			goto errout;
-
-		for_nexthops(fi) {
-			if (!(nhp = nla_reserve_nohdr(skb, sizeof(*nhp))))
-				goto errout;
-
-			nhp->rtnh_flags = nh->nh_flags & 0xFF;
-			nhp->rtnh_hops = nh->nh_weight - 1;
-			nhp->rtnh_ifindex = nh->nh_oif;
-
-			if (nh->nh_gw &&
-			    nla_put_le16(skb, RTA_GATEWAY, nh->nh_gw) < 0)
-				goto errout;
-
-			nhp->rtnh_len = skb_tail_pointer(skb) - (unsigned char *)nhp;
-		} endfor_nexthops(fi);
-
-		nla_nest_end(skb, mp_head);
-	}
-
-	nlmsg_end(skb, nlh);
-	return 0;
-
-errout:
-	nlmsg_cancel(skb, nlh);
-	return -EMSGSIZE;
-}
-
-
-static void dn_rtmsg_fib(int event, struct dn_fib_node *f, int z, u32 tb_id,
-			struct nlmsghdr *nlh, struct netlink_skb_parms *req)
-{
-	struct sk_buff *skb;
-	u32 portid = req ? req->portid : 0;
-	int err = -ENOBUFS;
-
-	skb = nlmsg_new(dn_fib_nlmsg_size(DN_FIB_INFO(f)), GFP_KERNEL);
-	if (skb == NULL)
-		goto errout;
-
-	err = dn_fib_dump_info(skb, portid, nlh->nlmsg_seq, event, tb_id,
-			       f->fn_type, f->fn_scope, &f->fn_key, z,
-			       DN_FIB_INFO(f), 0);
-	if (err < 0) {
-		/* -EMSGSIZE implies BUG in dn_fib_nlmsg_size() */
-		WARN_ON(err == -EMSGSIZE);
-		kfree_skb(skb);
-		goto errout;
-	}
-	rtnl_notify(skb, &init_net, portid, RTNLGRP_DECnet_ROUTE, nlh, GFP_KERNEL);
-	return;
-errout:
-	if (err < 0)
-		rtnl_set_sk_err(&init_net, RTNLGRP_DECnet_ROUTE, err);
-}
-
-static __inline__ int dn_hash_dump_bucket(struct sk_buff *skb,
-				struct netlink_callback *cb,
-				struct dn_fib_table *tb,
-				struct dn_zone *dz,
-				struct dn_fib_node *f)
-{
-	int i, s_i;
-
-	s_i = cb->args[4];
-	for(i = 0; f; i++, f = f->fn_next) {
-		if (i < s_i)
-			continue;
-		if (f->fn_state & DN_S_ZOMBIE)
-			continue;
-		if (dn_fib_dump_info(skb, NETLINK_CB(cb->skb).portid,
-				cb->nlh->nlmsg_seq,
-				RTM_NEWROUTE,
-				tb->n,
-				(f->fn_state & DN_S_ZOMBIE) ? 0 : f->fn_type,
-				f->fn_scope, &f->fn_key, dz->dz_order,
-				f->fn_info, NLM_F_MULTI) < 0) {
-			cb->args[4] = i;
-			return -1;
-		}
-	}
-	cb->args[4] = i;
-	return skb->len;
-}
-
-static __inline__ int dn_hash_dump_zone(struct sk_buff *skb,
-				struct netlink_callback *cb,
-				struct dn_fib_table *tb,
-				struct dn_zone *dz)
-{
-	int h, s_h;
-
-	s_h = cb->args[3];
-	for(h = 0; h < dz->dz_divisor; h++) {
-		if (h < s_h)
-			continue;
-		if (h > s_h)
-			memset(&cb->args[4], 0, sizeof(cb->args) - 4*sizeof(cb->args[0]));
-		if (dz->dz_hash == NULL || dz->dz_hash[h] == NULL)
-			continue;
-		if (dn_hash_dump_bucket(skb, cb, tb, dz, dz->dz_hash[h]) < 0) {
-			cb->args[3] = h;
-			return -1;
-		}
-	}
-	cb->args[3] = h;
-	return skb->len;
-}
-
-static int dn_fib_table_dump(struct dn_fib_table *tb, struct sk_buff *skb,
-				struct netlink_callback *cb)
-{
-	int m, s_m;
-	struct dn_zone *dz;
-	struct dn_hash *table = (struct dn_hash *)tb->data;
-
-	s_m = cb->args[2];
-	read_lock(&dn_fib_tables_lock);
-	for(dz = table->dh_zone_list, m = 0; dz; dz = dz->dz_next, m++) {
-		if (m < s_m)
-			continue;
-		if (m > s_m)
-			memset(&cb->args[3], 0, sizeof(cb->args) - 3*sizeof(cb->args[0]));
-
-		if (dn_hash_dump_zone(skb, cb, tb, dz) < 0) {
-			cb->args[2] = m;
-			read_unlock(&dn_fib_tables_lock);
-			return -1;
-		}
-	}
-	read_unlock(&dn_fib_tables_lock);
-	cb->args[2] = m;
-
-	return skb->len;
-}
-
-int dn_fib_dump(struct sk_buff *skb, struct netlink_callback *cb)
-{
-	struct net *net = sock_net(skb->sk);
-	unsigned int h, s_h;
-	unsigned int e = 0, s_e;
-	struct dn_fib_table *tb;
-	int dumped = 0;
-
-	if (!net_eq(net, &init_net))
-		return 0;
-
-	if (nlmsg_len(cb->nlh) >= sizeof(struct rtmsg) &&
-		((struct rtmsg *)nlmsg_data(cb->nlh))->rtm_flags&RTM_F_CLONED)
-			return dn_cache_dump(skb, cb);
-
-	s_h = cb->args[0];
-	s_e = cb->args[1];
-
-	for (h = s_h; h < DN_FIB_TABLE_HASHSZ; h++, s_h = 0) {
-		e = 0;
-		hlist_for_each_entry(tb, &dn_fib_table_hash[h], hlist) {
-			if (e < s_e)
-				goto next;
-			if (dumped)
-				memset(&cb->args[2], 0, sizeof(cb->args) -
-						 2 * sizeof(cb->args[0]));
-			if (tb->dump(tb, skb, cb) < 0)
-				goto out;
-			dumped = 1;
-next:
-			e++;
-		}
-	}
-out:
-	cb->args[1] = e;
-	cb->args[0] = h;
-
-	return skb->len;
-}
-
-static int dn_fib_table_insert(struct dn_fib_table *tb, struct rtmsg *r, struct nlattr *attrs[],
-			       struct nlmsghdr *n, struct netlink_skb_parms *req)
-{
-	struct dn_hash *table = (struct dn_hash *)tb->data;
-	struct dn_fib_node *new_f, *f, **fp, **del_fp;
-	struct dn_zone *dz;
-	struct dn_fib_info *fi;
-	int z = r->rtm_dst_len;
-	int type = r->rtm_type;
-	dn_fib_key_t key;
-	int err;
-
-	if (z > 16)
-		return -EINVAL;
-
-	dz = table->dh_zones[z];
-	if (!dz && !(dz = dn_new_zone(table, z)))
-		return -ENOBUFS;
-
-	dz_key_0(key);
-	if (attrs[RTA_DST]) {
-		__le16 dst = nla_get_le16(attrs[RTA_DST]);
-		if (dst & ~DZ_MASK(dz))
-			return -EINVAL;
-		key = dz_key(dst, dz);
-	}
-
-	if ((fi = dn_fib_create_info(r, attrs, n, &err)) == NULL)
-		return err;
-
-	if (dz->dz_nent > (dz->dz_divisor << 2) &&
-			dz->dz_divisor > DN_MAX_DIVISOR &&
-			(z==16 || (1<<z) > dz->dz_divisor))
-		dn_rehash_zone(dz);
-
-	fp = dn_chain_p(key, dz);
-
-	DN_FIB_SCAN(f, fp) {
-		if (dn_key_leq(key, f->fn_key))
-			break;
-	}
-
-	del_fp = NULL;
-
-	if (f && (f->fn_state & DN_S_ZOMBIE) &&
-			dn_key_eq(f->fn_key, key)) {
-		del_fp = fp;
-		fp = &f->fn_next;
-		f = *fp;
-		goto create;
-	}
-
-	DN_FIB_SCAN_KEY(f, fp, key) {
-		if (fi->fib_priority <= DN_FIB_INFO(f)->fib_priority)
-			break;
-	}
-
-	if (f && dn_key_eq(f->fn_key, key) &&
-			fi->fib_priority == DN_FIB_INFO(f)->fib_priority) {
-		struct dn_fib_node **ins_fp;
-
-		err = -EEXIST;
-		if (n->nlmsg_flags & NLM_F_EXCL)
-			goto out;
-
-		if (n->nlmsg_flags & NLM_F_REPLACE) {
-			del_fp = fp;
-			fp = &f->fn_next;
-			f = *fp;
-			goto replace;
-		}
-
-		ins_fp = fp;
-		err = -EEXIST;
-
-		DN_FIB_SCAN_KEY(f, fp, key) {
-			if (fi->fib_priority != DN_FIB_INFO(f)->fib_priority)
-				break;
-			if (f->fn_type == type &&
-			    f->fn_scope == r->rtm_scope &&
-			    DN_FIB_INFO(f) == fi)
-				goto out;
-		}
-
-		if (!(n->nlmsg_flags & NLM_F_APPEND)) {
-			fp = ins_fp;
-			f = *fp;
-		}
-	}
-
-create:
-	err = -ENOENT;
-	if (!(n->nlmsg_flags & NLM_F_CREATE))
-		goto out;
-
-replace:
-	err = -ENOBUFS;
-	new_f = kmem_cache_zalloc(dn_hash_kmem, GFP_KERNEL);
-	if (new_f == NULL)
-		goto out;
-
-	new_f->fn_key = key;
-	new_f->fn_type = type;
-	new_f->fn_scope = r->rtm_scope;
-	DN_FIB_INFO(new_f) = fi;
-
-	new_f->fn_next = f;
-	write_lock_bh(&dn_fib_tables_lock);
-	*fp = new_f;
-	write_unlock_bh(&dn_fib_tables_lock);
-	dz->dz_nent++;
-
-	if (del_fp) {
-		f = *del_fp;
-		write_lock_bh(&dn_fib_tables_lock);
-		*del_fp = f->fn_next;
-		write_unlock_bh(&dn_fib_tables_lock);
-
-		if (!(f->fn_state & DN_S_ZOMBIE))
-			dn_rtmsg_fib(RTM_DELROUTE, f, z, tb->n, n, req);
-		if (f->fn_state & DN_S_ACCESSED)
-			dn_rt_cache_flush(-1);
-		dn_free_node(f);
-		dz->dz_nent--;
-	} else {
-		dn_rt_cache_flush(-1);
-	}
-
-	dn_rtmsg_fib(RTM_NEWROUTE, new_f, z, tb->n, n, req);
-
-	return 0;
-out:
-	dn_fib_release_info(fi);
-	return err;
-}
-
-
-static int dn_fib_table_delete(struct dn_fib_table *tb, struct rtmsg *r, struct nlattr *attrs[],
-			       struct nlmsghdr *n, struct netlink_skb_parms *req)
-{
-	struct dn_hash *table = (struct dn_hash*)tb->data;
-	struct dn_fib_node **fp, **del_fp, *f;
-	int z = r->rtm_dst_len;
-	struct dn_zone *dz;
-	dn_fib_key_t key;
-	int matched;
-
-
-	if (z > 16)
-		return -EINVAL;
-
-	if ((dz = table->dh_zones[z]) == NULL)
-		return -ESRCH;
-
-	dz_key_0(key);
-	if (attrs[RTA_DST]) {
-		__le16 dst = nla_get_le16(attrs[RTA_DST]);
-		if (dst & ~DZ_MASK(dz))
-			return -EINVAL;
-		key = dz_key(dst, dz);
-	}
-
-	fp = dn_chain_p(key, dz);
-
-	DN_FIB_SCAN(f, fp) {
-		if (dn_key_eq(f->fn_key, key))
-			break;
-		if (dn_key_leq(key, f->fn_key))
-			return -ESRCH;
-	}
-
-	matched = 0;
-	del_fp = NULL;
-	DN_FIB_SCAN_KEY(f, fp, key) {
-		struct dn_fib_info *fi = DN_FIB_INFO(f);
-
-		if (f->fn_state & DN_S_ZOMBIE)
-			return -ESRCH;
-
-		matched++;
-
-		if (del_fp == NULL &&
-				(!r->rtm_type || f->fn_type == r->rtm_type) &&
-				(r->rtm_scope == RT_SCOPE_NOWHERE || f->fn_scope == r->rtm_scope) &&
-				(!r->rtm_protocol ||
-					fi->fib_protocol == r->rtm_protocol) &&
-				dn_fib_nh_match(r, n, attrs, fi) == 0)
-			del_fp = fp;
-	}
-
-	if (del_fp) {
-		f = *del_fp;
-		dn_rtmsg_fib(RTM_DELROUTE, f, z, tb->n, n, req);
-
-		if (matched != 1) {
-			write_lock_bh(&dn_fib_tables_lock);
-			*del_fp = f->fn_next;
-			write_unlock_bh(&dn_fib_tables_lock);
-
-			if (f->fn_state & DN_S_ACCESSED)
-				dn_rt_cache_flush(-1);
-			dn_free_node(f);
-			dz->dz_nent--;
-		} else {
-			f->fn_state |= DN_S_ZOMBIE;
-			if (f->fn_state & DN_S_ACCESSED) {
-				f->fn_state &= ~DN_S_ACCESSED;
-				dn_rt_cache_flush(-1);
-			}
-			if (++dn_fib_hash_zombies > 128)
-				dn_fib_flush();
-		}
-
-		return 0;
-	}
-
-	return -ESRCH;
-}
-
-static inline int dn_flush_list(struct dn_fib_node **fp, int z, struct dn_hash *table)
-{
-	int found = 0;
-	struct dn_fib_node *f;
-
-	while((f = *fp) != NULL) {
-		struct dn_fib_info *fi = DN_FIB_INFO(f);
-
-		if (fi && ((f->fn_state & DN_S_ZOMBIE) || (fi->fib_flags & RTNH_F_DEAD))) {
-			write_lock_bh(&dn_fib_tables_lock);
-			*fp = f->fn_next;
-			write_unlock_bh(&dn_fib_tables_lock);
-
-			dn_free_node(f);
-			found++;
-			continue;
-		}
-		fp = &f->fn_next;
-	}
-
-	return found;
-}
-
-static int dn_fib_table_flush(struct dn_fib_table *tb)
-{
-	struct dn_hash *table = (struct dn_hash *)tb->data;
-	struct dn_zone *dz;
-	int found = 0;
-
-	dn_fib_hash_zombies = 0;
-	for(dz = table->dh_zone_list; dz; dz = dz->dz_next) {
-		int i;
-		int tmp = 0;
-		for(i = dz->dz_divisor-1; i >= 0; i--)
-			tmp += dn_flush_list(&dz->dz_hash[i], dz->dz_order, table);
-		dz->dz_nent -= tmp;
-		found += tmp;
-	}
-
-	return found;
-}
-
-static int dn_fib_table_lookup(struct dn_fib_table *tb, const struct flowidn *flp, struct dn_fib_res *res)
-{
-	int err;
-	struct dn_zone *dz;
-	struct dn_hash *t = (struct dn_hash *)tb->data;
-
-	read_lock(&dn_fib_tables_lock);
-	for(dz = t->dh_zone_list; dz; dz = dz->dz_next) {
-		struct dn_fib_node *f;
-		dn_fib_key_t k = dz_key(flp->daddr, dz);
-
-		for(f = dz_chain(k, dz); f; f = f->fn_next) {
-			if (!dn_key_eq(k, f->fn_key)) {
-				if (dn_key_leq(k, f->fn_key))
-					break;
-				else
-					continue;
-			}
-
-			f->fn_state |= DN_S_ACCESSED;
-
-			if (f->fn_state&DN_S_ZOMBIE)
-				continue;
-
-			if (f->fn_scope < flp->flowidn_scope)
-				continue;
-
-			err = dn_fib_semantic_match(f->fn_type, DN_FIB_INFO(f), flp, res);
-
-			if (err == 0) {
-				res->type = f->fn_type;
-				res->scope = f->fn_scope;
-				res->prefixlen = dz->dz_order;
-				goto out;
-			}
-			if (err < 0)
-				goto out;
-		}
-	}
-	err = 1;
-out:
-	read_unlock(&dn_fib_tables_lock);
-	return err;
-}
-
-
-struct dn_fib_table *dn_fib_get_table(u32 n, int create)
-{
-	struct dn_fib_table *t;
-	unsigned int h;
-
-	if (n < RT_TABLE_MIN)
-		return NULL;
-
-	if (n > RT_TABLE_MAX)
-		return NULL;
-
-	h = n & (DN_FIB_TABLE_HASHSZ - 1);
-	rcu_read_lock();
-	hlist_for_each_entry_rcu(t, &dn_fib_table_hash[h], hlist) {
-		if (t->n == n) {
-			rcu_read_unlock();
-			return t;
-		}
-	}
-	rcu_read_unlock();
-
-	if (!create)
-		return NULL;
-
-	if (in_interrupt()) {
-		net_dbg_ratelimited("DECnet: BUG! Attempt to create routing table from interrupt\n");
-		return NULL;
-	}
-
-	t = kzalloc(sizeof(struct dn_fib_table) + sizeof(struct dn_hash),
-		    GFP_KERNEL);
-	if (t == NULL)
-		return NULL;
-
-	t->n = n;
-	t->insert = dn_fib_table_insert;
-	t->delete = dn_fib_table_delete;
-	t->lookup = dn_fib_table_lookup;
-	t->flush  = dn_fib_table_flush;
-	t->dump = dn_fib_table_dump;
-	hlist_add_head_rcu(&t->hlist, &dn_fib_table_hash[h]);
-
-	return t;
-}
-
-struct dn_fib_table *dn_fib_empty_table(void)
-{
-	u32 id;
-
-	for(id = RT_TABLE_MIN; id <= RT_TABLE_MAX; id++)
-		if (dn_fib_get_table(id, 0) == NULL)
-			return dn_fib_get_table(id, 1);
-	return NULL;
-}
-
-void dn_fib_flush(void)
-{
-	int flushed = 0;
-	struct dn_fib_table *tb;
-	unsigned int h;
-
-	for (h = 0; h < DN_FIB_TABLE_HASHSZ; h++) {
-		hlist_for_each_entry(tb, &dn_fib_table_hash[h], hlist)
-			flushed += tb->flush(tb);
-	}
-
-	if (flushed)
-		dn_rt_cache_flush(-1);
-}
-
-void __init dn_fib_table_init(void)
-{
-	dn_hash_kmem = kmem_cache_create("dn_fib_info_cache",
-					sizeof(struct dn_fib_info),
-					0, SLAB_HWCACHE_ALIGN,
-					NULL);
-}
-
-void __exit dn_fib_table_cleanup(void)
-{
-	struct dn_fib_table *t;
-	struct hlist_node *next;
-	unsigned int h;
-
-	write_lock(&dn_fib_tables_lock);
-	for (h = 0; h < DN_FIB_TABLE_HASHSZ; h++) {
-		hlist_for_each_entry_safe(t, next, &dn_fib_table_hash[h],
-					  hlist) {
-			hlist_del(&t->hlist);
-			kfree(t);
-		}
-	}
-	write_unlock(&dn_fib_tables_lock);
-}
diff --git a/net/decnet/dn_timer.c b/net/decnet/dn_timer.c
deleted file mode 100644
index aa4155875ca8..000000000000
--- a/net/decnet/dn_timer.c
+++ /dev/null
@@ -1,104 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * 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 Socket Timer Functions
- *
- * Author:      Steve Whitehouse <SteveW@ACM.org>
- *
- *
- * Changes:
- *       Steve Whitehouse      : Made keepalive timer part of the same
- *                               timer idea.
- *       Steve Whitehouse      : Added checks for sk->sock_readers
- *       David S. Miller       : New socket locking
- *       Steve Whitehouse      : Timer grabs socket ref.
- */
-#include <linux/net.h>
-#include <linux/socket.h>
-#include <linux/skbuff.h>
-#include <linux/netdevice.h>
-#include <linux/timer.h>
-#include <linux/spinlock.h>
-#include <net/sock.h>
-#include <linux/atomic.h>
-#include <linux/jiffies.h>
-#include <net/flow.h>
-#include <net/dn.h>
-
-/*
- * Slow timer is for everything else (n * 500mS)
- */
-
-#define SLOW_INTERVAL (HZ/2)
-
-static void dn_slow_timer(struct timer_list *t);
-
-void dn_start_slow_timer(struct sock *sk)
-{
-	timer_setup(&sk->sk_timer, dn_slow_timer, 0);
-	sk_reset_timer(sk, &sk->sk_timer, jiffies + SLOW_INTERVAL);
-}
-
-void dn_stop_slow_timer(struct sock *sk)
-{
-	sk_stop_timer(sk, &sk->sk_timer);
-}
-
-static void dn_slow_timer(struct timer_list *t)
-{
-	struct sock *sk = from_timer(sk, t, sk_timer);
-	struct dn_scp *scp = DN_SK(sk);
-
-	bh_lock_sock(sk);
-
-	if (sock_owned_by_user(sk)) {
-		sk_reset_timer(sk, &sk->sk_timer, jiffies + HZ / 10);
-		goto out;
-	}
-
-	/*
-	 * The persist timer is the standard slow timer used for retransmits
-	 * in both connection establishment and disconnection as well as
-	 * in the RUN state. The different states are catered for by changing
-	 * the function pointer in the socket. Setting the timer to a value
-	 * of zero turns it off. We allow the persist_fxn to turn the
-	 * timer off in a permant way by returning non-zero, so that
-	 * timer based routines may remove sockets. This is why we have a
-	 * sock_hold()/sock_put() around the timer to prevent the socket
-	 * going away in the middle.
-	 */
-	if (scp->persist && scp->persist_fxn) {
-		if (scp->persist <= SLOW_INTERVAL) {
-			scp->persist = 0;
-
-			if (scp->persist_fxn(sk))
-				goto out;
-		} else {
-			scp->persist -= SLOW_INTERVAL;
-		}
-	}
-
-	/*
-	 * Check for keepalive timeout. After the other timer 'cos if
-	 * the previous timer caused a retransmit, we don't need to
-	 * do this. scp->stamp is the last time that we sent a packet.
-	 * The keepalive function sends a link service packet to the
-	 * other end. If it remains unacknowledged, the standard
-	 * socket timers will eventually shut the socket down. Each
-	 * time we do this, scp->stamp will be updated, thus
-	 * we won't try and send another until scp->keepalive has passed
-	 * since the last successful transmission.
-	 */
-	if (scp->keepalive && scp->keepalive_fxn && (scp->state == DN_RUN)) {
-		if (time_after_eq(jiffies, scp->stamp + scp->keepalive))
-			scp->keepalive_fxn(sk);
-	}
-
-	sk_reset_timer(sk, &sk->sk_timer, jiffies + SLOW_INTERVAL);
-out:
-	bh_unlock_sock(sk);
-	sock_put(sk);
-}
diff --git a/net/decnet/netfilter/Kconfig b/net/decnet/netfilter/Kconfig
deleted file mode 100644
index 14ec4ef95fab..000000000000
--- a/net/decnet/netfilter/Kconfig
+++ /dev/null
@@ -1,17 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0-only
-#
-# DECnet netfilter configuration
-#
-
-menu "DECnet: Netfilter Configuration"
-	depends on DECNET && NETFILTER
-	depends on NETFILTER_ADVANCED
-
-config DECNET_NF_GRABULATOR
-	tristate "Routing message grabulator (for userland routing daemon)"
-	help
-	  Enable this module if you want to use the userland DECnet routing
-	  daemon. You will also need to enable routing support for DECnet
-	  unless you just want to monitor routing messages from other nodes.
-
-endmenu
diff --git a/net/decnet/netfilter/Makefile b/net/decnet/netfilter/Makefile
deleted file mode 100644
index 429c84289d0f..000000000000
--- a/net/decnet/netfilter/Makefile
+++ /dev/null
@@ -1,6 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0-only
-#
-# Makefile for DECnet netfilter modules
-#
-
-obj-$(CONFIG_DECNET_NF_GRABULATOR) += dn_rtmsg.o
diff --git a/net/decnet/netfilter/dn_rtmsg.c b/net/decnet/netfilter/dn_rtmsg.c
deleted file mode 100644
index 26a9193df783..000000000000
--- a/net/decnet/netfilter/dn_rtmsg.c
+++ /dev/null
@@ -1,158 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * 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 Routing Message Grabulator
- *
- *              (C) 2000 ChyGwyn Limited  -  https://www.chygwyn.com/
- *
- * Author:      Steven Whitehouse <steve@chygwyn.com>
- */
-#include <linux/module.h>
-#include <linux/skbuff.h>
-#include <linux/slab.h>
-#include <linux/init.h>
-#include <linux/netdevice.h>
-#include <linux/netfilter.h>
-#include <linux/spinlock.h>
-#include <net/netlink.h>
-#include <linux/netfilter_decnet.h>
-
-#include <net/sock.h>
-#include <net/flow.h>
-#include <net/dn.h>
-#include <net/dn_route.h>
-
-static struct sock *dnrmg = NULL;
-
-
-static struct sk_buff *dnrmg_build_message(struct sk_buff *rt_skb, int *errp)
-{
-	struct sk_buff *skb = NULL;
-	size_t size;
-	sk_buff_data_t old_tail;
-	struct nlmsghdr *nlh;
-	unsigned char *ptr;
-	struct nf_dn_rtmsg *rtm;
-
-	size = NLMSG_ALIGN(rt_skb->len) +
-	       NLMSG_ALIGN(sizeof(struct nf_dn_rtmsg));
-	skb = nlmsg_new(size, GFP_ATOMIC);
-	if (!skb) {
-		*errp = -ENOMEM;
-		return NULL;
-	}
-	old_tail = skb->tail;
-	nlh = nlmsg_put(skb, 0, 0, 0, size, 0);
-	if (!nlh) {
-		kfree_skb(skb);
-		*errp = -ENOMEM;
-		return NULL;
-	}
-	rtm = (struct nf_dn_rtmsg *)nlmsg_data(nlh);
-	rtm->nfdn_ifindex = rt_skb->dev->ifindex;
-	ptr = NFDN_RTMSG(rtm);
-	skb_copy_from_linear_data(rt_skb, ptr, rt_skb->len);
-	nlh->nlmsg_len = skb->tail - old_tail;
-	return skb;
-}
-
-static void dnrmg_send_peer(struct sk_buff *skb)
-{
-	struct sk_buff *skb2;
-	int status = 0;
-	int group = 0;
-	unsigned char flags = *skb->data;
-
-	switch (flags & DN_RT_CNTL_MSK) {
-	case DN_RT_PKT_L1RT:
-		group = DNRNG_NLGRP_L1;
-		break;
-	case DN_RT_PKT_L2RT:
-		group = DNRNG_NLGRP_L2;
-		break;
-	default:
-		return;
-	}
-
-	skb2 = dnrmg_build_message(skb, &status);
-	if (skb2 == NULL)
-		return;
-	NETLINK_CB(skb2).dst_group = group;
-	netlink_broadcast(dnrmg, skb2, 0, group, GFP_ATOMIC);
-}
-
-
-static unsigned int dnrmg_hook(void *priv,
-			struct sk_buff *skb,
-			const struct nf_hook_state *state)
-{
-	dnrmg_send_peer(skb);
-	return NF_ACCEPT;
-}
-
-
-#define RCV_SKB_FAIL(err) do { netlink_ack(skb, nlh, (err), NULL); return; } while (0)
-
-static inline void dnrmg_receive_user_skb(struct sk_buff *skb)
-{
-	struct nlmsghdr *nlh = nlmsg_hdr(skb);
-
-	if (skb->len < sizeof(*nlh) ||
-	    nlh->nlmsg_len < sizeof(*nlh) ||
-	    skb->len < nlh->nlmsg_len)
-		return;
-
-	if (!netlink_capable(skb, CAP_NET_ADMIN))
-		RCV_SKB_FAIL(-EPERM);
-
-	/* Eventually we might send routing messages too */
-
-	RCV_SKB_FAIL(-EINVAL);
-}
-
-static const struct nf_hook_ops dnrmg_ops = {
-	.hook		= dnrmg_hook,
-	.pf		= NFPROTO_DECNET,
-	.hooknum	= NF_DN_ROUTE,
-	.priority	= NF_DN_PRI_DNRTMSG,
-};
-
-static int __init dn_rtmsg_init(void)
-{
-	int rv = 0;
-	struct netlink_kernel_cfg cfg = {
-		.groups	= DNRNG_NLGRP_MAX,
-		.input	= dnrmg_receive_user_skb,
-	};
-
-	dnrmg = netlink_kernel_create(&init_net, NETLINK_DNRTMSG, &cfg);
-	if (dnrmg == NULL) {
-		printk(KERN_ERR "dn_rtmsg: Cannot create netlink socket");
-		return -ENOMEM;
-	}
-
-	rv = nf_register_net_hook(&init_net, &dnrmg_ops);
-	if (rv) {
-		netlink_kernel_release(dnrmg);
-	}
-
-	return rv;
-}
-
-static void __exit dn_rtmsg_fini(void)
-{
-	nf_unregister_net_hook(&init_net, &dnrmg_ops);
-	netlink_kernel_release(dnrmg);
-}
-
-
-MODULE_DESCRIPTION("DECnet Routing Message Grabulator");
-MODULE_AUTHOR("Steven Whitehouse <steve@chygwyn.com>");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_DNRTMSG);
-
-module_init(dn_rtmsg_init);
-module_exit(dn_rtmsg_fini);
diff --git a/net/decnet/sysctl_net_decnet.c b/net/decnet/sysctl_net_decnet.c
deleted file mode 100644
index 67b5ab2657b7..000000000000
--- a/net/decnet/sysctl_net_decnet.c
+++ /dev/null
@@ -1,362 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * 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 sysctl support functions
- *
- * Author:      Steve Whitehouse <SteveW@ACM.org>
- *
- *
- * Changes:
- * Steve Whitehouse - C99 changes and default device handling
- * Steve Whitehouse - Memory buffer settings, like the tcp ones
- *
- */
-#include <linux/mm.h>
-#include <linux/sysctl.h>
-#include <linux/fs.h>
-#include <linux/netdevice.h>
-#include <linux/string.h>
-#include <net/neighbour.h>
-#include <net/dst.h>
-#include <net/flow.h>
-
-#include <linux/uaccess.h>
-
-#include <net/dn.h>
-#include <net/dn_dev.h>
-#include <net/dn_route.h>
-
-
-int decnet_debug_level;
-int decnet_time_wait = 30;
-int decnet_dn_count = 1;
-int decnet_di_count = 3;
-int decnet_dr_count = 3;
-int decnet_log_martians = 1;
-int decnet_no_fc_max_cwnd = NSP_MIN_WINDOW;
-
-/* Reasonable defaults, I hope, based on tcp's defaults */
-long sysctl_decnet_mem[3] = { 768 << 3, 1024 << 3, 1536 << 3 };
-int sysctl_decnet_wmem[3] = { 4 * 1024, 16 * 1024, 128 * 1024 };
-int sysctl_decnet_rmem[3] = { 4 * 1024, 87380, 87380 * 2 };
-
-#ifdef CONFIG_SYSCTL
-extern int decnet_dst_gc_interval;
-static int min_decnet_time_wait[] = { 5 };
-static int max_decnet_time_wait[] = { 600 };
-static int min_state_count[] = { 1 };
-static int max_state_count[] = { NSP_MAXRXTSHIFT };
-static int min_decnet_dst_gc_interval[] = { 1 };
-static int max_decnet_dst_gc_interval[] = { 60 };
-static int min_decnet_no_fc_max_cwnd[] = { NSP_MIN_WINDOW };
-static int max_decnet_no_fc_max_cwnd[] = { NSP_MAX_WINDOW };
-static char node_name[7] = "???";
-
-static struct ctl_table_header *dn_table_header = NULL;
-
-/*
- * ctype.h :-)
- */
-#define ISNUM(x) (((x) >= '0') && ((x) <= '9'))
-#define ISLOWER(x) (((x) >= 'a') && ((x) <= 'z'))
-#define ISUPPER(x) (((x) >= 'A') && ((x) <= 'Z'))
-#define ISALPHA(x) (ISLOWER(x) || ISUPPER(x))
-#define INVALID_END_CHAR(x) (ISNUM(x) || ISALPHA(x))
-
-static void strip_it(char *str)
-{
-	for(;;) {
-		switch (*str) {
-		case ' ':
-		case '\n':
-		case '\r':
-		case ':':
-			*str = 0;
-			fallthrough;
-		case 0:
-			return;
-		}
-		str++;
-	}
-}
-
-/*
- * Simple routine to parse an ascii DECnet address
- * into a network order address.
- */
-static int parse_addr(__le16 *addr, char *str)
-{
-	__u16 area, node;
-
-	while(*str && !ISNUM(*str)) str++;
-
-	if (*str == 0)
-		return -1;
-
-	area = (*str++ - '0');
-	if (ISNUM(*str)) {
-		area *= 10;
-		area += (*str++ - '0');
-	}
-
-	if (*str++ != '.')
-		return -1;
-
-	if (!ISNUM(*str))
-		return -1;
-
-	node = *str++ - '0';
-	if (ISNUM(*str)) {
-		node *= 10;
-		node += (*str++ - '0');
-	}
-	if (ISNUM(*str)) {
-		node *= 10;
-		node += (*str++ - '0');
-	}
-	if (ISNUM(*str)) {
-		node *= 10;
-		node += (*str++ - '0');
-	}
-
-	if ((node > 1023) || (area > 63))
-		return -1;
-
-	if (INVALID_END_CHAR(*str))
-		return -1;
-
-	*addr = cpu_to_le16((area << 10) | node);
-
-	return 0;
-}
-
-static int dn_node_address_handler(struct ctl_table *table, int write,
-		void *buffer, size_t *lenp, loff_t *ppos)
-{
-	char addr[DN_ASCBUF_LEN];
-	size_t len;
-	__le16 dnaddr;
-
-	if (!*lenp || (*ppos && !write)) {
-		*lenp = 0;
-		return 0;
-	}
-
-	if (write) {
-		len = (*lenp < DN_ASCBUF_LEN) ? *lenp : (DN_ASCBUF_LEN-1);
-		memcpy(addr, buffer, len);
-		addr[len] = 0;
-		strip_it(addr);
-
-		if (parse_addr(&dnaddr, addr))
-			return -EINVAL;
-
-		dn_dev_devices_off();
-
-		decnet_address = dnaddr;
-
-		dn_dev_devices_on();
-
-		*ppos += len;
-
-		return 0;
-	}
-
-	dn_addr2asc(le16_to_cpu(decnet_address), addr);
-	len = strlen(addr);
-	addr[len++] = '\n';
-
-	if (len > *lenp)
-		len = *lenp;
-	memcpy(buffer, addr, len);
-	*lenp = len;
-	*ppos += len;
-
-	return 0;
-}
-
-static int dn_def_dev_handler(struct ctl_table *table, int write,
-		void *buffer, size_t *lenp, loff_t *ppos)
-{
-	size_t len;
-	struct net_device *dev;
-	char devname[17];
-
-	if (!*lenp || (*ppos && !write)) {
-		*lenp = 0;
-		return 0;
-	}
-
-	if (write) {
-		if (*lenp > 16)
-			return -E2BIG;
-
-		memcpy(devname, buffer, *lenp);
-		devname[*lenp] = 0;
-		strip_it(devname);
-
-		dev = dev_get_by_name(&init_net, devname);
-		if (dev == NULL)
-			return -ENODEV;
-
-		if (dev->dn_ptr == NULL) {
-			dev_put(dev);
-			return -ENODEV;
-		}
-
-		if (dn_dev_set_default(dev, 1)) {
-			dev_put(dev);
-			return -ENODEV;
-		}
-		*ppos += *lenp;
-
-		return 0;
-	}
-
-	dev = dn_dev_get_default();
-	if (dev == NULL) {
-		*lenp = 0;
-		return 0;
-	}
-
-	strcpy(devname, dev->name);
-	dev_put(dev);
-	len = strlen(devname);
-	devname[len++] = '\n';
-
-	if (len > *lenp) len = *lenp;
-
-	memcpy(buffer, devname, len);
-	*lenp = len;
-	*ppos += len;
-
-	return 0;
-}
-
-static struct ctl_table dn_table[] = {
-	{
-		.procname = "node_address",
-		.maxlen = 7,
-		.mode = 0644,
-		.proc_handler = dn_node_address_handler,
-	},
-	{
-		.procname = "node_name",
-		.data = node_name,
-		.maxlen = 7,
-		.mode = 0644,
-		.proc_handler = proc_dostring,
-	},
-	{
-		.procname = "default_device",
-		.maxlen = 16,
-		.mode = 0644,
-		.proc_handler = dn_def_dev_handler,
-	},
-	{
-		.procname = "time_wait",
-		.data = &decnet_time_wait,
-		.maxlen = sizeof(int),
-		.mode = 0644,
-		.proc_handler = proc_dointvec_minmax,
-		.extra1 = &min_decnet_time_wait,
-		.extra2 = &max_decnet_time_wait
-	},
-	{
-		.procname = "dn_count",
-		.data = &decnet_dn_count,
-		.maxlen = sizeof(int),
-		.mode = 0644,
-		.proc_handler = proc_dointvec_minmax,
-		.extra1 = &min_state_count,
-		.extra2 = &max_state_count
-	},
-	{
-		.procname = "di_count",
-		.data = &decnet_di_count,
-		.maxlen = sizeof(int),
-		.mode = 0644,
-		.proc_handler = proc_dointvec_minmax,
-		.extra1 = &min_state_count,
-		.extra2 = &max_state_count
-	},
-	{
-		.procname = "dr_count",
-		.data = &decnet_dr_count,
-		.maxlen = sizeof(int),
-		.mode = 0644,
-		.proc_handler = proc_dointvec_minmax,
-		.extra1 = &min_state_count,
-		.extra2 = &max_state_count
-	},
-	{
-		.procname = "dst_gc_interval",
-		.data = &decnet_dst_gc_interval,
-		.maxlen = sizeof(int),
-		.mode = 0644,
-		.proc_handler = proc_dointvec_minmax,
-		.extra1 = &min_decnet_dst_gc_interval,
-		.extra2 = &max_decnet_dst_gc_interval
-	},
-	{
-		.procname = "no_fc_max_cwnd",
-		.data = &decnet_no_fc_max_cwnd,
-		.maxlen = sizeof(int),
-		.mode = 0644,
-		.proc_handler = proc_dointvec_minmax,
-		.extra1 = &min_decnet_no_fc_max_cwnd,
-		.extra2 = &max_decnet_no_fc_max_cwnd
-	},
-       {
-		.procname = "decnet_mem",
-		.data = &sysctl_decnet_mem,
-		.maxlen = sizeof(sysctl_decnet_mem),
-		.mode = 0644,
-		.proc_handler = proc_doulongvec_minmax
-	},
-	{
-		.procname = "decnet_rmem",
-		.data = &sysctl_decnet_rmem,
-		.maxlen = sizeof(sysctl_decnet_rmem),
-		.mode = 0644,
-		.proc_handler = proc_dointvec,
-	},
-	{
-		.procname = "decnet_wmem",
-		.data = &sysctl_decnet_wmem,
-		.maxlen = sizeof(sysctl_decnet_wmem),
-		.mode = 0644,
-		.proc_handler = proc_dointvec,
-	},
-	{
-		.procname = "debug",
-		.data = &decnet_debug_level,
-		.maxlen = sizeof(int),
-		.mode = 0644,
-		.proc_handler = proc_dointvec,
-	},
-	{ }
-};
-
-void dn_register_sysctl(void)
-{
-	dn_table_header = register_net_sysctl(&init_net, "net/decnet", dn_table);
-}
-
-void dn_unregister_sysctl(void)
-{
-	unregister_net_sysctl_table(dn_table_header);
-}
-
-#else  /* CONFIG_SYSCTL */
-void dn_unregister_sysctl(void)
-{
-}
-void dn_register_sysctl(void)
-{
-}
-
-#endif
diff --git a/net/netfilter/core.c b/net/netfilter/core.c
index dcf752b55a52..5a6705a0e4ec 100644
--- a/net/netfilter/core.c
+++ b/net/netfilter/core.c
@@ -300,12 +300,6 @@ nf_hook_entry_head(struct net *net, int pf, unsigned int hooknum,
 		if (WARN_ON_ONCE(ARRAY_SIZE(net->nf.hooks_ipv6) <= hooknum))
 			return NULL;
 		return net->nf.hooks_ipv6 + hooknum;
-#if IS_ENABLED(CONFIG_DECNET)
-	case NFPROTO_DECNET:
-		if (WARN_ON_ONCE(ARRAY_SIZE(net->nf.hooks_decnet) <= hooknum))
-			return NULL;
-		return net->nf.hooks_decnet + hooknum;
-#endif
 	default:
 		WARN_ON_ONCE(1);
 		return NULL;
@@ -750,10 +744,6 @@ static int __net_init netfilter_net_init(struct net *net)
 #ifdef CONFIG_NETFILTER_FAMILY_BRIDGE
 	__netfilter_net_init(net->nf.hooks_bridge, ARRAY_SIZE(net->nf.hooks_bridge));
 #endif
-#if IS_ENABLED(CONFIG_DECNET)
-	__netfilter_net_init(net->nf.hooks_decnet, ARRAY_SIZE(net->nf.hooks_decnet));
-#endif
-
 #ifdef CONFIG_PROC_FS
 	net->nf.proc_netfilter = proc_net_mkdir(net, "netfilter",
 						net->proc_net);
diff --git a/net/netfilter/nfnetlink_hook.c b/net/netfilter/nfnetlink_hook.c
index 71e29adac48b..8120aadf6a0f 100644
--- a/net/netfilter/nfnetlink_hook.c
+++ b/net/netfilter/nfnetlink_hook.c
@@ -215,13 +215,6 @@ nfnl_hook_entries_head(u8 pf, unsigned int hook, struct net *net, const char *de
 		hook_head = rcu_dereference(net->nf.hooks_bridge[hook]);
 #endif
 		break;
-#if IS_ENABLED(CONFIG_DECNET)
-	case NFPROTO_DECNET:
-		if (hook >= ARRAY_SIZE(net->nf.hooks_decnet))
-			return ERR_PTR(-EINVAL);
-		hook_head = rcu_dereference(net->nf.hooks_decnet[hook]);
-		break;
-#endif
 #if defined(CONFIG_NETFILTER_INGRESS) || defined(CONFIG_NETFILTER_EGRESS)
 	case NFPROTO_NETDEV:
 		if (hook >= NF_NETDEV_NUMHOOKS)