net: remove ISDN subsystem and Bluetooth CMTP

Remove the ISDN (mISDN, CAPI) subsystem and Bluetooth CMTP protocol
from the kernel tree.

ISDN is a pretty old technology and it's unclear whether anyone still
uses it. I went over the last few years of git history and all the
commits are either tree-wide conversions or syzbot/static analyzer
fixes.

When we discussed removal in the past IIRC there were some concerns
about ISDN still being used in parts of Germany. Unfortunately, the
code base is quite old, none of the current maintainers are familiar
with it and AI tools will have a field day finding bugs here.

Delete this code and preserve it in an out-of-tree repository
for any remaining users:
https://github.com/linux-netdev/mod-orphan

UAPI constants AF_ISDN/PF_ISDN and the SELinux isdn_socket class
are preserved for ABI stability, but the rest of uAPI is removed.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Stephen Hemminger <stephen@networkplumber.org>
Acked-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20260421022108.1299678-1-kuba@kernel.org
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

1 files changed, 0 insertions, 825 deletions

diff --git a/drivers/isdn/mISDN/socket.c b/drivers/isdn/mISDN/socket.c
deleted file mode 100644
index 77b900db1cac..000000000000
--- a/drivers/isdn/mISDN/socket.c
+++ /dev/null
@@ -1,825 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- *
- * Author	Karsten Keil <kkeil@novell.com>
- *
- * Copyright 2008  by Karsten Keil <kkeil@novell.com>
- */
-
-#include <linux/mISDNif.h>
-#include <linux/slab.h>
-#include <linux/export.h>
-#include "core.h"
-
-static u_int	*debug;
-
-static struct proto mISDN_proto = {
-	.name		= "misdn",
-	.owner		= THIS_MODULE,
-	.obj_size	= sizeof(struct mISDN_sock)
-};
-
-#define _pms(sk)	((struct mISDN_sock *)sk)
-
-static struct mISDN_sock_list	data_sockets = {
-	.lock = __RW_LOCK_UNLOCKED(data_sockets.lock)
-};
-
-static struct mISDN_sock_list	base_sockets = {
-	.lock = __RW_LOCK_UNLOCKED(base_sockets.lock)
-};
-
-#define L2_HEADER_LEN	4
-
-static inline struct sk_buff *
-_l2_alloc_skb(unsigned int len, gfp_t gfp_mask)
-{
-	struct sk_buff  *skb;
-
-	skb = alloc_skb(len + L2_HEADER_LEN, gfp_mask);
-	if (likely(skb))
-		skb_reserve(skb, L2_HEADER_LEN);
-	return skb;
-}
-
-static void
-mISDN_sock_link(struct mISDN_sock_list *l, struct sock *sk)
-{
-	write_lock_bh(&l->lock);
-	sk_add_node(sk, &l->head);
-	write_unlock_bh(&l->lock);
-}
-
-static void mISDN_sock_unlink(struct mISDN_sock_list *l, struct sock *sk)
-{
-	write_lock_bh(&l->lock);
-	sk_del_node_init(sk);
-	write_unlock_bh(&l->lock);
-}
-
-static int
-mISDN_send(struct mISDNchannel *ch, struct sk_buff *skb)
-{
-	struct mISDN_sock *msk;
-	int	err;
-
-	msk = container_of(ch, struct mISDN_sock, ch);
-	if (*debug & DEBUG_SOCKET)
-		printk(KERN_DEBUG "%s len %d %p\n", __func__, skb->len, skb);
-	if (msk->sk.sk_state == MISDN_CLOSED)
-		return -EUNATCH;
-	__net_timestamp(skb);
-	err = sock_queue_rcv_skb(&msk->sk, skb);
-	if (err)
-		printk(KERN_WARNING "%s: error %d\n", __func__, err);
-	return err;
-}
-
-static int
-mISDN_ctrl(struct mISDNchannel *ch, u_int cmd, void *arg)
-{
-	struct mISDN_sock *msk;
-
-	msk = container_of(ch, struct mISDN_sock, ch);
-	if (*debug & DEBUG_SOCKET)
-		printk(KERN_DEBUG "%s(%p, %x, %p)\n", __func__, ch, cmd, arg);
-	switch (cmd) {
-	case CLOSE_CHANNEL:
-		msk->sk.sk_state = MISDN_CLOSED;
-		break;
-	}
-	return 0;
-}
-
-static inline void
-mISDN_sock_cmsg(struct sock *sk, struct msghdr *msg, struct sk_buff *skb)
-{
-	struct __kernel_old_timeval	tv;
-
-	if (_pms(sk)->cmask & MISDN_TIME_STAMP) {
-		skb_get_timestamp(skb, &tv);
-		put_cmsg(msg, SOL_MISDN, MISDN_TIME_STAMP, sizeof(tv), &tv);
-	}
-}
-
-static int
-mISDN_sock_recvmsg(struct socket *sock, struct msghdr *msg, size_t len,
-		   int flags)
-{
-	struct sk_buff		*skb;
-	struct sock		*sk = sock->sk;
-
-	int		copied, err;
-
-	if (*debug & DEBUG_SOCKET)
-		printk(KERN_DEBUG "%s: len %d, flags %x ch.nr %d, proto %x\n",
-		       __func__, (int)len, flags, _pms(sk)->ch.nr,
-		       sk->sk_protocol);
-	if (flags & (MSG_OOB))
-		return -EOPNOTSUPP;
-
-	if (sk->sk_state == MISDN_CLOSED)
-		return 0;
-
-	skb = skb_recv_datagram(sk, flags, &err);
-	if (!skb)
-		return err;
-
-	if (msg->msg_name) {
-		DECLARE_SOCKADDR(struct sockaddr_mISDN *, maddr, msg->msg_name);
-
-		maddr->family = AF_ISDN;
-		maddr->dev = _pms(sk)->dev->id;
-		if ((sk->sk_protocol == ISDN_P_LAPD_TE) ||
-		    (sk->sk_protocol == ISDN_P_LAPD_NT)) {
-			maddr->channel = (mISDN_HEAD_ID(skb) >> 16) & 0xff;
-			maddr->tei =  (mISDN_HEAD_ID(skb) >> 8) & 0xff;
-			maddr->sapi = mISDN_HEAD_ID(skb) & 0xff;
-		} else {
-			maddr->channel = _pms(sk)->ch.nr;
-			maddr->sapi = _pms(sk)->ch.addr & 0xFF;
-			maddr->tei =  (_pms(sk)->ch.addr >> 8) & 0xFF;
-		}
-		msg->msg_namelen = sizeof(*maddr);
-	}
-
-	copied = skb->len + MISDN_HEADER_LEN;
-	if (len < copied) {
-		if (flags & MSG_PEEK)
-			refcount_dec(&skb->users);
-		else
-			skb_queue_head(&sk->sk_receive_queue, skb);
-		return -ENOSPC;
-	}
-	memcpy(skb_push(skb, MISDN_HEADER_LEN), mISDN_HEAD_P(skb),
-	       MISDN_HEADER_LEN);
-
-	err = skb_copy_datagram_msg(skb, 0, msg, copied);
-
-	mISDN_sock_cmsg(sk, msg, skb);
-
-	skb_free_datagram(sk, skb);
-
-	return err ? : copied;
-}
-
-static int
-mISDN_sock_sendmsg(struct socket *sock, struct msghdr *msg, size_t len)
-{
-	struct sock		*sk = sock->sk;
-	struct sk_buff		*skb;
-	int			err = -ENOMEM;
-
-	if (*debug & DEBUG_SOCKET)
-		printk(KERN_DEBUG "%s: len %d flags %x ch %d proto %x\n",
-		       __func__, (int)len, msg->msg_flags, _pms(sk)->ch.nr,
-		       sk->sk_protocol);
-
-	if (msg->msg_flags & MSG_OOB)
-		return -EOPNOTSUPP;
-
-	if (msg->msg_flags & ~(MSG_DONTWAIT | MSG_NOSIGNAL | MSG_ERRQUEUE))
-		return -EINVAL;
-
-	if (len < MISDN_HEADER_LEN)
-		return -EINVAL;
-
-	if (sk->sk_state != MISDN_BOUND)
-		return -EBADFD;
-
-	lock_sock(sk);
-
-	skb = _l2_alloc_skb(len, GFP_KERNEL);
-	if (!skb)
-		goto done;
-
-	if (memcpy_from_msg(skb_put(skb, len), msg, len)) {
-		err = -EFAULT;
-		goto done;
-	}
-
-	memcpy(mISDN_HEAD_P(skb), skb->data, MISDN_HEADER_LEN);
-	skb_pull(skb, MISDN_HEADER_LEN);
-
-	if (msg->msg_namelen >= sizeof(struct sockaddr_mISDN)) {
-		/* if we have a address, we use it */
-		DECLARE_SOCKADDR(struct sockaddr_mISDN *, maddr, msg->msg_name);
-		mISDN_HEAD_ID(skb) = maddr->channel;
-	} else { /* use default for L2 messages */
-		if ((sk->sk_protocol == ISDN_P_LAPD_TE) ||
-		    (sk->sk_protocol == ISDN_P_LAPD_NT))
-			mISDN_HEAD_ID(skb) = _pms(sk)->ch.nr;
-	}
-
-	if (*debug & DEBUG_SOCKET)
-		printk(KERN_DEBUG "%s: ID:%x\n",
-		       __func__, mISDN_HEAD_ID(skb));
-
-	err = -ENODEV;
-	if (!_pms(sk)->ch.peer)
-		goto done;
-	err = _pms(sk)->ch.recv(_pms(sk)->ch.peer, skb);
-	if (err)
-		goto done;
-	else {
-		skb = NULL;
-		err = len;
-	}
-
-done:
-	kfree_skb(skb);
-	release_sock(sk);
-	return err;
-}
-
-static int
-data_sock_release(struct socket *sock)
-{
-	struct sock *sk = sock->sk;
-
-	if (*debug & DEBUG_SOCKET)
-		printk(KERN_DEBUG "%s(%p) sk=%p\n", __func__, sock, sk);
-	if (!sk)
-		return 0;
-	switch (sk->sk_protocol) {
-	case ISDN_P_TE_S0:
-	case ISDN_P_NT_S0:
-	case ISDN_P_TE_E1:
-	case ISDN_P_NT_E1:
-		if (sk->sk_state == MISDN_BOUND)
-			delete_channel(&_pms(sk)->ch);
-		else
-			mISDN_sock_unlink(&data_sockets, sk);
-		break;
-	case ISDN_P_LAPD_TE:
-	case ISDN_P_LAPD_NT:
-	case ISDN_P_B_RAW:
-	case ISDN_P_B_HDLC:
-	case ISDN_P_B_X75SLP:
-	case ISDN_P_B_L2DTMF:
-	case ISDN_P_B_L2DSP:
-	case ISDN_P_B_L2DSPHDLC:
-		delete_channel(&_pms(sk)->ch);
-		mISDN_sock_unlink(&data_sockets, sk);
-		break;
-	}
-
-	lock_sock(sk);
-
-	sock_orphan(sk);
-	skb_queue_purge(&sk->sk_receive_queue);
-
-	release_sock(sk);
-	sock_put(sk);
-
-	return 0;
-}
-
-static int
-data_sock_ioctl_bound(struct sock *sk, unsigned int cmd, void __user *p)
-{
-	struct mISDN_ctrl_req	cq;
-	int			err = -EINVAL, val[2];
-	struct mISDNchannel	*bchan, *next;
-
-	lock_sock(sk);
-	if (!_pms(sk)->dev) {
-		err = -ENODEV;
-		goto done;
-	}
-	switch (cmd) {
-	case IMCTRLREQ:
-		if (copy_from_user(&cq, p, sizeof(cq))) {
-			err = -EFAULT;
-			break;
-		}
-		if ((sk->sk_protocol & ~ISDN_P_B_MASK) == ISDN_P_B_START) {
-			list_for_each_entry_safe(bchan, next,
-						 &_pms(sk)->dev->bchannels, list) {
-				if (bchan->nr == cq.channel) {
-					err = bchan->ctrl(bchan,
-							  CONTROL_CHANNEL, &cq);
-					break;
-				}
-			}
-		} else
-			err = _pms(sk)->dev->D.ctrl(&_pms(sk)->dev->D,
-						    CONTROL_CHANNEL, &cq);
-		if (err)
-			break;
-		if (copy_to_user(p, &cq, sizeof(cq)))
-			err = -EFAULT;
-		break;
-	case IMCLEAR_L2:
-		if (sk->sk_protocol != ISDN_P_LAPD_NT) {
-			err = -EINVAL;
-			break;
-		}
-		val[0] = cmd;
-		if (get_user(val[1], (int __user *)p)) {
-			err = -EFAULT;
-			break;
-		}
-		err = _pms(sk)->dev->teimgr->ctrl(_pms(sk)->dev->teimgr,
-						  CONTROL_CHANNEL, val);
-		break;
-	case IMHOLD_L1:
-		if (sk->sk_protocol != ISDN_P_LAPD_NT
-		    && sk->sk_protocol != ISDN_P_LAPD_TE) {
-			err = -EINVAL;
-			break;
-		}
-		val[0] = cmd;
-		if (get_user(val[1], (int __user *)p)) {
-			err = -EFAULT;
-			break;
-		}
-		err = _pms(sk)->dev->teimgr->ctrl(_pms(sk)->dev->teimgr,
-						  CONTROL_CHANNEL, val);
-		break;
-	default:
-		err = -EINVAL;
-		break;
-	}
-done:
-	release_sock(sk);
-	return err;
-}
-
-static int
-data_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
-{
-	int			err = 0, id;
-	struct sock		*sk = sock->sk;
-	struct mISDNdevice	*dev;
-	struct mISDNversion	ver;
-
-	switch (cmd) {
-	case IMGETVERSION:
-		ver.major = MISDN_MAJOR_VERSION;
-		ver.minor = MISDN_MINOR_VERSION;
-		ver.release = MISDN_RELEASE;
-		if (copy_to_user((void __user *)arg, &ver, sizeof(ver)))
-			err = -EFAULT;
-		break;
-	case IMGETCOUNT:
-		id = get_mdevice_count();
-		if (put_user(id, (int __user *)arg))
-			err = -EFAULT;
-		break;
-	case IMGETDEVINFO:
-		if (get_user(id, (int __user *)arg)) {
-			err = -EFAULT;
-			break;
-		}
-		dev = get_mdevice(id);
-		if (dev) {
-			struct mISDN_devinfo di;
-
-			memset(&di, 0, sizeof(di));
-			di.id = dev->id;
-			di.Dprotocols = dev->Dprotocols;
-			di.Bprotocols = dev->Bprotocols | get_all_Bprotocols();
-			di.protocol = dev->D.protocol;
-			memcpy(di.channelmap, dev->channelmap,
-			       sizeof(di.channelmap));
-			di.nrbchan = dev->nrbchan;
-			strscpy(di.name, dev_name(&dev->dev), sizeof(di.name));
-			if (copy_to_user((void __user *)arg, &di, sizeof(di)))
-				err = -EFAULT;
-		} else
-			err = -ENODEV;
-		break;
-	default:
-		if (sk->sk_state == MISDN_BOUND)
-			err = data_sock_ioctl_bound(sk, cmd,
-						    (void __user *)arg);
-		else
-			err = -ENOTCONN;
-	}
-	return err;
-}
-
-static int data_sock_setsockopt(struct socket *sock, int level, int optname,
-				sockptr_t optval, unsigned int optlen)
-{
-	struct sock *sk = sock->sk;
-	int err = 0, opt = 0;
-
-	if (*debug & DEBUG_SOCKET)
-		printk(KERN_DEBUG "%s(%p, %d, %x, optval, %d)\n", __func__, sock,
-		       level, optname, optlen);
-
-	lock_sock(sk);
-
-	switch (optname) {
-	case MISDN_TIME_STAMP:
-		err = copy_safe_from_sockptr(&opt, sizeof(opt),
-					     optval, optlen);
-		if (err)
-			break;
-
-		if (opt)
-			_pms(sk)->cmask |= MISDN_TIME_STAMP;
-		else
-			_pms(sk)->cmask &= ~MISDN_TIME_STAMP;
-		break;
-	default:
-		err = -ENOPROTOOPT;
-		break;
-	}
-	release_sock(sk);
-	return err;
-}
-
-static int data_sock_getsockopt(struct socket *sock, int level, int optname,
-				char __user *optval, int __user *optlen)
-{
-	struct sock *sk = sock->sk;
-	int len, opt;
-
-	if (get_user(len, optlen))
-		return -EFAULT;
-
-	if (len != sizeof(char))
-		return -EINVAL;
-
-	switch (optname) {
-	case MISDN_TIME_STAMP:
-		if (_pms(sk)->cmask & MISDN_TIME_STAMP)
-			opt = 1;
-		else
-			opt = 0;
-
-		if (put_user(opt, optval))
-			return -EFAULT;
-		break;
-	default:
-		return -ENOPROTOOPT;
-	}
-
-	return 0;
-}
-
-static int
-data_sock_bind(struct socket *sock, struct sockaddr_unsized *addr, int addr_len)
-{
-	struct sockaddr_mISDN *maddr = (struct sockaddr_mISDN *) addr;
-	struct sock *sk = sock->sk;
-	struct sock *csk;
-	int err = 0;
-
-	if (*debug & DEBUG_SOCKET)
-		printk(KERN_DEBUG "%s(%p) sk=%p\n", __func__, sock, sk);
-	if (addr_len != sizeof(struct sockaddr_mISDN))
-		return -EINVAL;
-	if (!maddr || maddr->family != AF_ISDN)
-		return -EINVAL;
-
-	lock_sock(sk);
-
-	if (_pms(sk)->dev) {
-		err = -EALREADY;
-		goto done;
-	}
-	_pms(sk)->dev = get_mdevice(maddr->dev);
-	if (!_pms(sk)->dev) {
-		err = -ENODEV;
-		goto done;
-	}
-
-	if (sk->sk_protocol < ISDN_P_B_START) {
-		read_lock_bh(&data_sockets.lock);
-		sk_for_each(csk, &data_sockets.head) {
-			if (sk == csk)
-				continue;
-			if (_pms(csk)->dev != _pms(sk)->dev)
-				continue;
-			if (csk->sk_protocol >= ISDN_P_B_START)
-				continue;
-			if (IS_ISDN_P_TE(csk->sk_protocol)
-			    == IS_ISDN_P_TE(sk->sk_protocol))
-				continue;
-			read_unlock_bh(&data_sockets.lock);
-			err = -EBUSY;
-			goto done;
-		}
-		read_unlock_bh(&data_sockets.lock);
-	}
-
-	_pms(sk)->ch.send = mISDN_send;
-	_pms(sk)->ch.ctrl = mISDN_ctrl;
-
-	switch (sk->sk_protocol) {
-	case ISDN_P_TE_S0:
-	case ISDN_P_NT_S0:
-	case ISDN_P_TE_E1:
-	case ISDN_P_NT_E1:
-		mISDN_sock_unlink(&data_sockets, sk);
-		err = connect_layer1(_pms(sk)->dev, &_pms(sk)->ch,
-				     sk->sk_protocol, maddr);
-		if (err)
-			mISDN_sock_link(&data_sockets, sk);
-		break;
-	case ISDN_P_LAPD_TE:
-	case ISDN_P_LAPD_NT:
-		err = create_l2entity(_pms(sk)->dev, &_pms(sk)->ch,
-				      sk->sk_protocol, maddr);
-		break;
-	case ISDN_P_B_RAW:
-	case ISDN_P_B_HDLC:
-	case ISDN_P_B_X75SLP:
-	case ISDN_P_B_L2DTMF:
-	case ISDN_P_B_L2DSP:
-	case ISDN_P_B_L2DSPHDLC:
-		err = connect_Bstack(_pms(sk)->dev, &_pms(sk)->ch,
-				     sk->sk_protocol, maddr);
-		break;
-	default:
-		err = -EPROTONOSUPPORT;
-	}
-	if (err)
-		goto done;
-	sk->sk_state = MISDN_BOUND;
-	_pms(sk)->ch.protocol = sk->sk_protocol;
-
-done:
-	release_sock(sk);
-	return err;
-}
-
-static int
-data_sock_getname(struct socket *sock, struct sockaddr *addr,
-		  int peer)
-{
-	struct sockaddr_mISDN	*maddr = (struct sockaddr_mISDN *) addr;
-	struct sock		*sk = sock->sk;
-
-	if (!_pms(sk)->dev)
-		return -EBADFD;
-
-	lock_sock(sk);
-
-	maddr->family = AF_ISDN;
-	maddr->dev = _pms(sk)->dev->id;
-	maddr->channel = _pms(sk)->ch.nr;
-	maddr->sapi = _pms(sk)->ch.addr & 0xff;
-	maddr->tei = (_pms(sk)->ch.addr >> 8) & 0xff;
-	release_sock(sk);
-	return sizeof(*maddr);
-}
-
-static const struct proto_ops data_sock_ops = {
-	.family		= PF_ISDN,
-	.owner		= THIS_MODULE,
-	.release	= data_sock_release,
-	.ioctl		= data_sock_ioctl,
-	.bind		= data_sock_bind,
-	.getname	= data_sock_getname,
-	.sendmsg	= mISDN_sock_sendmsg,
-	.recvmsg	= mISDN_sock_recvmsg,
-	.poll		= datagram_poll,
-	.listen		= sock_no_listen,
-	.shutdown	= sock_no_shutdown,
-	.setsockopt	= data_sock_setsockopt,
-	.getsockopt	= data_sock_getsockopt,
-	.connect	= sock_no_connect,
-	.socketpair	= sock_no_socketpair,
-	.accept		= sock_no_accept,
-	.mmap		= sock_no_mmap
-};
-
-static int
-data_sock_create(struct net *net, struct socket *sock, int protocol, int kern)
-{
-	struct sock *sk;
-
-	if (sock->type != SOCK_DGRAM)
-		return -ESOCKTNOSUPPORT;
-
-	sk = sk_alloc(net, PF_ISDN, GFP_KERNEL, &mISDN_proto, kern);
-	if (!sk)
-		return -ENOMEM;
-
-	sock_init_data(sock, sk);
-
-	sock->ops = &data_sock_ops;
-	sock->state = SS_UNCONNECTED;
-	sock_reset_flag(sk, SOCK_ZAPPED);
-
-	sk->sk_protocol = protocol;
-	sk->sk_state    = MISDN_OPEN;
-	mISDN_sock_link(&data_sockets, sk);
-
-	return 0;
-}
-
-static int
-base_sock_release(struct socket *sock)
-{
-	struct sock *sk = sock->sk;
-
-	printk(KERN_DEBUG "%s(%p) sk=%p\n", __func__, sock, sk);
-	if (!sk)
-		return 0;
-
-	mISDN_sock_unlink(&base_sockets, sk);
-	sock_orphan(sk);
-	sock_put(sk);
-
-	return 0;
-}
-
-static int
-base_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
-{
-	int			err = 0, id;
-	struct mISDNdevice	*dev;
-	struct mISDNversion	ver;
-
-	switch (cmd) {
-	case IMGETVERSION:
-		ver.major = MISDN_MAJOR_VERSION;
-		ver.minor = MISDN_MINOR_VERSION;
-		ver.release = MISDN_RELEASE;
-		if (copy_to_user((void __user *)arg, &ver, sizeof(ver)))
-			err = -EFAULT;
-		break;
-	case IMGETCOUNT:
-		id = get_mdevice_count();
-		if (put_user(id, (int __user *)arg))
-			err = -EFAULT;
-		break;
-	case IMGETDEVINFO:
-		if (get_user(id, (int __user *)arg)) {
-			err = -EFAULT;
-			break;
-		}
-		dev = get_mdevice(id);
-		if (dev) {
-			struct mISDN_devinfo di;
-
-			memset(&di, 0, sizeof(di));
-			di.id = dev->id;
-			di.Dprotocols = dev->Dprotocols;
-			di.Bprotocols = dev->Bprotocols | get_all_Bprotocols();
-			di.protocol = dev->D.protocol;
-			memcpy(di.channelmap, dev->channelmap,
-			       sizeof(di.channelmap));
-			di.nrbchan = dev->nrbchan;
-			strscpy(di.name, dev_name(&dev->dev), sizeof(di.name));
-			if (copy_to_user((void __user *)arg, &di, sizeof(di)))
-				err = -EFAULT;
-		} else
-			err = -ENODEV;
-		break;
-	case IMSETDEVNAME:
-	{
-		struct mISDN_devrename dn;
-		if (copy_from_user(&dn, (void __user *)arg,
-				   sizeof(dn))) {
-			err = -EFAULT;
-			break;
-		}
-		dn.name[sizeof(dn.name) - 1] = '\0';
-		dev = get_mdevice(dn.id);
-		if (dev)
-			err = device_rename(&dev->dev, dn.name);
-		else
-			err = -ENODEV;
-	}
-	break;
-	default:
-		err = -EINVAL;
-	}
-	return err;
-}
-
-static int
-base_sock_bind(struct socket *sock, struct sockaddr_unsized *addr, int addr_len)
-{
-	struct sockaddr_mISDN *maddr = (struct sockaddr_mISDN *) addr;
-	struct sock *sk = sock->sk;
-	int err = 0;
-
-	if (addr_len < sizeof(struct sockaddr_mISDN))
-		return -EINVAL;
-
-	if (!maddr || maddr->family != AF_ISDN)
-		return -EINVAL;
-
-	lock_sock(sk);
-
-	if (_pms(sk)->dev) {
-		err = -EALREADY;
-		goto done;
-	}
-
-	_pms(sk)->dev = get_mdevice(maddr->dev);
-	if (!_pms(sk)->dev) {
-		err = -ENODEV;
-		goto done;
-	}
-	sk->sk_state = MISDN_BOUND;
-
-done:
-	release_sock(sk);
-	return err;
-}
-
-static const struct proto_ops base_sock_ops = {
-	.family		= PF_ISDN,
-	.owner		= THIS_MODULE,
-	.release	= base_sock_release,
-	.ioctl		= base_sock_ioctl,
-	.bind		= base_sock_bind,
-	.getname	= sock_no_getname,
-	.sendmsg	= sock_no_sendmsg,
-	.recvmsg	= sock_no_recvmsg,
-	.listen		= sock_no_listen,
-	.shutdown	= sock_no_shutdown,
-	.connect	= sock_no_connect,
-	.socketpair	= sock_no_socketpair,
-	.accept		= sock_no_accept,
-	.mmap		= sock_no_mmap
-};
-
-
-static int
-base_sock_create(struct net *net, struct socket *sock, int protocol, int kern)
-{
-	struct sock *sk;
-
-	if (sock->type != SOCK_RAW)
-		return -ESOCKTNOSUPPORT;
-	if (!capable(CAP_NET_RAW))
-		return -EPERM;
-
-	sk = sk_alloc(net, PF_ISDN, GFP_KERNEL, &mISDN_proto, kern);
-	if (!sk)
-		return -ENOMEM;
-
-	sock_init_data(sock, sk);
-	sock->ops = &base_sock_ops;
-	sock->state = SS_UNCONNECTED;
-	sock_reset_flag(sk, SOCK_ZAPPED);
-	sk->sk_protocol = protocol;
-	sk->sk_state    = MISDN_OPEN;
-	mISDN_sock_link(&base_sockets, sk);
-
-	return 0;
-}
-
-static int
-mISDN_sock_create(struct net *net, struct socket *sock, int proto, int kern)
-{
-	int err = -EPROTONOSUPPORT;
-
-	switch (proto) {
-	case ISDN_P_BASE:
-		err = base_sock_create(net, sock, proto, kern);
-		break;
-	case ISDN_P_TE_S0:
-	case ISDN_P_NT_S0:
-	case ISDN_P_TE_E1:
-	case ISDN_P_NT_E1:
-	case ISDN_P_LAPD_TE:
-	case ISDN_P_LAPD_NT:
-	case ISDN_P_B_RAW:
-	case ISDN_P_B_HDLC:
-	case ISDN_P_B_X75SLP:
-	case ISDN_P_B_L2DTMF:
-	case ISDN_P_B_L2DSP:
-	case ISDN_P_B_L2DSPHDLC:
-		err = data_sock_create(net, sock, proto, kern);
-		break;
-	default:
-		return err;
-	}
-
-	return err;
-}
-
-static const struct net_proto_family mISDN_sock_family_ops = {
-	.owner  = THIS_MODULE,
-	.family = PF_ISDN,
-	.create = mISDN_sock_create,
-};
-
-int
-misdn_sock_init(u_int *deb)
-{
-	int err;
-
-	debug = deb;
-	err = sock_register(&mISDN_sock_family_ops);
-	if (err)
-		printk(KERN_ERR "%s: error(%d)\n", __func__, err);
-	return err;
-}
-
-void
-misdn_sock_cleanup(void)
-{
-	sock_unregister(PF_ISDN);
-}