Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 674 insertions, 0 deletions

diff --git a/net/atm/svc.c b/net/atm/svc.c
new file mode 100644
index 000000000000..02f5374a51f2
--- /dev/null
+++ b/net/atm/svc.c
@@ -0,0 +1,674 @@
+/* net/atm/svc.c - ATM SVC sockets */
+
+/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
+
+
+#include <linux/string.h>
+#include <linux/net.h>		/* struct socket, struct proto_ops */
+#include <linux/errno.h>	/* error codes */
+#include <linux/kernel.h>	/* printk */
+#include <linux/skbuff.h>
+#include <linux/wait.h>
+#include <linux/sched.h>	/* jiffies and HZ */
+#include <linux/fcntl.h>	/* O_NONBLOCK */
+#include <linux/init.h>
+#include <linux/atm.h>		/* ATM stuff */
+#include <linux/atmsap.h>
+#include <linux/atmsvc.h>
+#include <linux/atmdev.h>
+#include <linux/bitops.h>
+#include <net/sock.h>		/* for sock_no_* */
+#include <asm/uaccess.h>
+
+#include "resources.h"
+#include "common.h"		/* common for PVCs and SVCs */
+#include "signaling.h"
+#include "addr.h"
+
+
+#if 0
+#define DPRINTK(format,args...) printk(KERN_DEBUG format,##args)
+#else
+#define DPRINTK(format,args...)
+#endif
+
+
+static int svc_create(struct socket *sock,int protocol);
+
+
+/*
+ * Note: since all this is still nicely synchronized with the signaling demon,
+ *       there's no need to protect sleep loops with clis. If signaling is
+ *       moved into the kernel, that would change.
+ */
+
+
+static int svc_shutdown(struct socket *sock,int how)
+{
+	return 0;
+}
+
+
+static void svc_disconnect(struct atm_vcc *vcc)
+{
+	DEFINE_WAIT(wait);
+	struct sk_buff *skb;
+	struct sock *sk = sk_atm(vcc);
+
+	DPRINTK("svc_disconnect %p\n",vcc);
+	if (test_bit(ATM_VF_REGIS,&vcc->flags)) {
+		prepare_to_wait(sk->sk_sleep, &wait, TASK_UNINTERRUPTIBLE);
+		sigd_enq(vcc,as_close,NULL,NULL,NULL);
+		while (!test_bit(ATM_VF_RELEASED,&vcc->flags) && sigd) {
+			schedule();
+			prepare_to_wait(sk->sk_sleep, &wait, TASK_UNINTERRUPTIBLE);
+		}
+		finish_wait(sk->sk_sleep, &wait);
+	}
+	/* beware - socket is still in use by atmsigd until the last
+	   as_indicate has been answered */
+	while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
+		atm_return(vcc, skb->truesize);
+		DPRINTK("LISTEN REL\n");
+		sigd_enq2(NULL,as_reject,vcc,NULL,NULL,&vcc->qos,0);
+		dev_kfree_skb(skb);
+	}
+	clear_bit(ATM_VF_REGIS, &vcc->flags);
+	/* ... may retry later */
+}
+
+
+static int svc_release(struct socket *sock)
+{
+	struct sock *sk = sock->sk;
+	struct atm_vcc *vcc;
+
+	if (sk)  {
+		vcc = ATM_SD(sock);
+		DPRINTK("svc_release %p\n", vcc);
+		clear_bit(ATM_VF_READY, &vcc->flags);
+		/* VCC pointer is used as a reference, so we must not free it
+		   (thereby subjecting it to re-use) before all pending connections
+	           are closed */
+		svc_disconnect(vcc);
+		vcc_release(sock);
+	}
+	return 0;
+}
+
+
+static int svc_bind(struct socket *sock,struct sockaddr *sockaddr,
+    int sockaddr_len)
+{
+	DEFINE_WAIT(wait);
+	struct sock *sk = sock->sk;
+	struct sockaddr_atmsvc *addr;
+	struct atm_vcc *vcc;
+	int error;
+
+	if (sockaddr_len != sizeof(struct sockaddr_atmsvc))
+		return -EINVAL;
+	lock_sock(sk);
+	if (sock->state == SS_CONNECTED) {
+		error = -EISCONN;
+		goto out;
+	}
+	if (sock->state != SS_UNCONNECTED) {
+		error = -EINVAL;
+		goto out;
+	}
+	vcc = ATM_SD(sock);
+	if (test_bit(ATM_VF_SESSION, &vcc->flags)) {
+		error = -EINVAL;
+		goto out;
+	}
+	addr = (struct sockaddr_atmsvc *) sockaddr;
+	if (addr->sas_family != AF_ATMSVC) {
+		error = -EAFNOSUPPORT;
+		goto out;
+	}
+	clear_bit(ATM_VF_BOUND,&vcc->flags);
+	    /* failing rebind will kill old binding */
+	/* @@@ check memory (de)allocation on rebind */
+	if (!test_bit(ATM_VF_HASQOS,&vcc->flags)) {
+		error = -EBADFD;
+		goto out;
+	}
+	vcc->local = *addr;
+	set_bit(ATM_VF_WAITING, &vcc->flags);
+	prepare_to_wait(sk->sk_sleep, &wait, TASK_UNINTERRUPTIBLE);
+	sigd_enq(vcc,as_bind,NULL,NULL,&vcc->local);
+	while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) {
+		schedule();
+		prepare_to_wait(sk->sk_sleep, &wait, TASK_UNINTERRUPTIBLE);
+	}
+	finish_wait(sk->sk_sleep, &wait);
+	clear_bit(ATM_VF_REGIS,&vcc->flags); /* doesn't count */
+	if (!sigd) {
+		error = -EUNATCH;
+		goto out;
+	}
+        if (!sk->sk_err)
+		set_bit(ATM_VF_BOUND,&vcc->flags);
+	error = -sk->sk_err;
+out:
+	release_sock(sk);
+	return error;
+}
+
+
+static int svc_connect(struct socket *sock,struct sockaddr *sockaddr,
+    int sockaddr_len,int flags)
+{
+	DEFINE_WAIT(wait);
+	struct sock *sk = sock->sk;
+	struct sockaddr_atmsvc *addr;
+	struct atm_vcc *vcc = ATM_SD(sock);
+	int error;
+
+	DPRINTK("svc_connect %p\n",vcc);
+	lock_sock(sk);
+	if (sockaddr_len != sizeof(struct sockaddr_atmsvc)) {
+		error = -EINVAL;
+		goto out;
+	}
+
+	switch (sock->state) {
+	default:
+		error = -EINVAL;
+		goto out;
+	case SS_CONNECTED:
+		error = -EISCONN;
+		goto out;
+	case SS_CONNECTING:
+		if (test_bit(ATM_VF_WAITING, &vcc->flags)) {
+			error = -EALREADY;
+			goto out;
+		}
+		sock->state = SS_UNCONNECTED;
+		if (sk->sk_err) {
+			error = -sk->sk_err;
+			goto out;
+		}
+		break;
+	case SS_UNCONNECTED:
+		addr = (struct sockaddr_atmsvc *) sockaddr;
+		if (addr->sas_family != AF_ATMSVC) {
+			error = -EAFNOSUPPORT;
+			goto out;
+		}
+		if (!test_bit(ATM_VF_HASQOS, &vcc->flags)) {
+			error = -EBADFD;
+			goto out;
+		}
+		if (vcc->qos.txtp.traffic_class == ATM_ANYCLASS ||
+		    vcc->qos.rxtp.traffic_class == ATM_ANYCLASS) {
+			error = -EINVAL;
+			goto out;
+		}
+		if (!vcc->qos.txtp.traffic_class &&
+		    !vcc->qos.rxtp.traffic_class) {
+			error = -EINVAL;
+			goto out;
+		}
+		vcc->remote = *addr;
+		set_bit(ATM_VF_WAITING, &vcc->flags);
+		prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
+		sigd_enq(vcc,as_connect,NULL,NULL,&vcc->remote);
+		if (flags & O_NONBLOCK) {
+			finish_wait(sk->sk_sleep, &wait);
+			sock->state = SS_CONNECTING;
+			error = -EINPROGRESS;
+			goto out;
+		}
+		error = 0;
+		while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) {
+			schedule();
+			if (!signal_pending(current)) {
+				prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
+				continue;
+			}
+			DPRINTK("*ABORT*\n");
+			/*
+			 * This is tricky:
+			 *   Kernel ---close--> Demon
+			 *   Kernel <--close--- Demon
+		         * or
+			 *   Kernel ---close--> Demon
+			 *   Kernel <--error--- Demon
+			 * or
+			 *   Kernel ---close--> Demon
+			 *   Kernel <--okay---- Demon
+			 *   Kernel <--close--- Demon
+			 */
+			sigd_enq(vcc,as_close,NULL,NULL,NULL);
+			while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) {
+				prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
+				schedule();
+			}
+			if (!sk->sk_err)
+				while (!test_bit(ATM_VF_RELEASED,&vcc->flags)
+				    && sigd) {
+					prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
+					schedule();
+				}
+			clear_bit(ATM_VF_REGIS,&vcc->flags);
+			clear_bit(ATM_VF_RELEASED,&vcc->flags);
+			clear_bit(ATM_VF_CLOSE,&vcc->flags);
+			    /* we're gone now but may connect later */
+			error = -EINTR;
+			break;
+		}
+		finish_wait(sk->sk_sleep, &wait);
+		if (error)
+			goto out;
+		if (!sigd) {
+			error = -EUNATCH;
+			goto out;
+		}
+		if (sk->sk_err) {
+			error = -sk->sk_err;
+			goto out;
+		}
+	}
+/*
+ * Not supported yet
+ *
+ * #ifndef CONFIG_SINGLE_SIGITF
+ */
+	vcc->qos.txtp.max_pcr = SELECT_TOP_PCR(vcc->qos.txtp);
+	vcc->qos.txtp.pcr = 0;
+	vcc->qos.txtp.min_pcr = 0;
+/*
+ * #endif
+ */
+	if (!(error = vcc_connect(sock, vcc->itf, vcc->vpi, vcc->vci)))
+		sock->state = SS_CONNECTED;
+	else
+		(void) svc_disconnect(vcc);
+out:
+	release_sock(sk);
+	return error;
+}
+
+
+static int svc_listen(struct socket *sock,int backlog)
+{
+	DEFINE_WAIT(wait);
+	struct sock *sk = sock->sk;
+	struct atm_vcc *vcc = ATM_SD(sock);
+	int error;
+
+	DPRINTK("svc_listen %p\n",vcc);
+	lock_sock(sk);
+	/* let server handle listen on unbound sockets */
+	if (test_bit(ATM_VF_SESSION,&vcc->flags)) {
+		error = -EINVAL;
+		goto out;
+	}
+	set_bit(ATM_VF_WAITING, &vcc->flags);
+	prepare_to_wait(sk->sk_sleep, &wait, TASK_UNINTERRUPTIBLE);
+	sigd_enq(vcc,as_listen,NULL,NULL,&vcc->local);
+	while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) {
+		schedule();
+		prepare_to_wait(sk->sk_sleep, &wait, TASK_UNINTERRUPTIBLE);
+	}
+	finish_wait(sk->sk_sleep, &wait);
+	if (!sigd) {
+		error = -EUNATCH;
+		goto out;
+	}
+	set_bit(ATM_VF_LISTEN,&vcc->flags);
+	sk->sk_max_ack_backlog = backlog > 0 ? backlog : ATM_BACKLOG_DEFAULT;
+	error = -sk->sk_err;
+out:
+	release_sock(sk);
+	return error;
+}
+
+
+static int svc_accept(struct socket *sock,struct socket *newsock,int flags)
+{
+	struct sock *sk = sock->sk;
+	struct sk_buff *skb;
+	struct atmsvc_msg *msg;
+	struct atm_vcc *old_vcc = ATM_SD(sock);
+	struct atm_vcc *new_vcc;
+	int error;
+
+	lock_sock(sk);
+
+	error = svc_create(newsock,0);
+	if (error)
+		goto out;
+
+	new_vcc = ATM_SD(newsock);
+
+	DPRINTK("svc_accept %p -> %p\n",old_vcc,new_vcc);
+	while (1) {
+		DEFINE_WAIT(wait);
+
+		prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
+		while (!(skb = skb_dequeue(&sk->sk_receive_queue)) &&
+		       sigd) {
+			if (test_bit(ATM_VF_RELEASED,&old_vcc->flags)) break;
+			if (test_bit(ATM_VF_CLOSE,&old_vcc->flags)) {
+				error = -sk->sk_err;
+				break;
+			}
+			if (flags & O_NONBLOCK) {
+				error = -EAGAIN;
+				break;
+			}
+			release_sock(sk);
+			schedule();
+			lock_sock(sk);
+			if (signal_pending(current)) {
+				error = -ERESTARTSYS;
+				break;
+			}
+			prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
+		}
+		finish_wait(sk->sk_sleep, &wait);
+		if (error)
+			goto out;
+		if (!skb) {
+			error = -EUNATCH;
+			goto out;
+		}
+		msg = (struct atmsvc_msg *) skb->data;
+		new_vcc->qos = msg->qos;
+		set_bit(ATM_VF_HASQOS,&new_vcc->flags);
+		new_vcc->remote = msg->svc;
+		new_vcc->local = msg->local;
+		new_vcc->sap = msg->sap;
+		error = vcc_connect(newsock, msg->pvc.sap_addr.itf,
+				    msg->pvc.sap_addr.vpi, msg->pvc.sap_addr.vci);
+		dev_kfree_skb(skb);
+		sk->sk_ack_backlog--;
+		if (error) {
+			sigd_enq2(NULL,as_reject,old_vcc,NULL,NULL,
+			    &old_vcc->qos,error);
+			error = error == -EAGAIN ? -EBUSY : error;
+			goto out;
+		}
+		/* wait should be short, so we ignore the non-blocking flag */
+		set_bit(ATM_VF_WAITING, &new_vcc->flags);
+		prepare_to_wait(sk_atm(new_vcc)->sk_sleep, &wait, TASK_UNINTERRUPTIBLE);
+		sigd_enq(new_vcc,as_accept,old_vcc,NULL,NULL);
+		while (test_bit(ATM_VF_WAITING, &new_vcc->flags) && sigd) {
+			release_sock(sk);
+			schedule();
+			lock_sock(sk);
+			prepare_to_wait(sk_atm(new_vcc)->sk_sleep, &wait, TASK_UNINTERRUPTIBLE);
+		}
+		finish_wait(sk_atm(new_vcc)->sk_sleep, &wait);
+		if (!sigd) {
+			error = -EUNATCH;
+			goto out;
+		}
+		if (!sk_atm(new_vcc)->sk_err)
+			break;
+		if (sk_atm(new_vcc)->sk_err != ERESTARTSYS) {
+			error = -sk_atm(new_vcc)->sk_err;
+			goto out;
+		}
+	}
+	newsock->state = SS_CONNECTED;
+out:
+	release_sock(sk);
+	return error;
+}
+
+
+static int svc_getname(struct socket *sock,struct sockaddr *sockaddr,
+    int *sockaddr_len,int peer)
+{
+	struct sockaddr_atmsvc *addr;
+
+	*sockaddr_len = sizeof(struct sockaddr_atmsvc);
+	addr = (struct sockaddr_atmsvc *) sockaddr;
+	memcpy(addr,peer ? &ATM_SD(sock)->remote : &ATM_SD(sock)->local,
+	    sizeof(struct sockaddr_atmsvc));
+	return 0;
+}
+
+
+int svc_change_qos(struct atm_vcc *vcc,struct atm_qos *qos)
+{
+	struct sock *sk = sk_atm(vcc);
+	DEFINE_WAIT(wait);
+
+	set_bit(ATM_VF_WAITING, &vcc->flags);
+	prepare_to_wait(sk->sk_sleep, &wait, TASK_UNINTERRUPTIBLE);
+	sigd_enq2(vcc,as_modify,NULL,NULL,&vcc->local,qos,0);
+	while (test_bit(ATM_VF_WAITING, &vcc->flags) &&
+	       !test_bit(ATM_VF_RELEASED, &vcc->flags) && sigd) {
+		schedule();
+		prepare_to_wait(sk->sk_sleep, &wait, TASK_UNINTERRUPTIBLE);
+	}
+	finish_wait(sk->sk_sleep, &wait);
+	if (!sigd) return -EUNATCH;
+	return -sk->sk_err;
+}
+
+
+static int svc_setsockopt(struct socket *sock, int level, int optname,
+			  char __user *optval, int optlen)
+{
+	struct sock *sk = sock->sk;
+	struct atm_vcc *vcc = ATM_SD(sock);
+	int value, error = 0;
+
+	lock_sock(sk);
+	switch (optname) {
+		case SO_ATMSAP:
+			if (level != SOL_ATM || optlen != sizeof(struct atm_sap)) {
+				error = -EINVAL;
+				goto out;
+			}
+			if (copy_from_user(&vcc->sap, optval, optlen)) {
+				error = -EFAULT;
+				goto out;
+			}
+			set_bit(ATM_VF_HASSAP, &vcc->flags);
+			break;
+ 		case SO_MULTIPOINT:
+			if (level != SOL_ATM || optlen != sizeof(int)) {
+				error = -EINVAL;
+				goto out;
+			}
+ 			if (get_user(value, (int __user *) optval)) {
+ 				error = -EFAULT;
+				goto out;
+			}
+			if (value == 1) {
+				set_bit(ATM_VF_SESSION, &vcc->flags);
+			} else if (value == 0) {
+				clear_bit(ATM_VF_SESSION, &vcc->flags);
+			} else {
+				error = -EINVAL;
+			}
+  			break;
+		default:
+			error = vcc_setsockopt(sock, level, optname,
+					       optval, optlen);
+	}
+
+out:
+	release_sock(sk);
+	return error;
+}
+
+
+static int svc_getsockopt(struct socket *sock,int level,int optname,
+    char __user *optval,int __user *optlen)
+{
+	struct sock *sk = sock->sk;
+	int error = 0, len;
+
+	lock_sock(sk);
+	if (!__SO_LEVEL_MATCH(optname, level) || optname != SO_ATMSAP) {
+		error = vcc_getsockopt(sock, level, optname, optval, optlen);
+		goto out;
+	}
+	if (get_user(len, optlen)) {
+		error = -EFAULT;
+		goto out;
+	}
+	if (len != sizeof(struct atm_sap)) {
+		error = -EINVAL;
+		goto out;
+	}
+	if (copy_to_user(optval, &ATM_SD(sock)->sap, sizeof(struct atm_sap))) {
+		error = -EFAULT;
+		goto out;
+	}
+out:
+	release_sock(sk);
+	return error;
+}
+
+
+static int svc_addparty(struct socket *sock, struct sockaddr *sockaddr,
+			int sockaddr_len, int flags)
+{
+	DEFINE_WAIT(wait);
+	struct sock *sk = sock->sk;
+	struct atm_vcc *vcc = ATM_SD(sock);
+	int error;
+
+	lock_sock(sk);
+	set_bit(ATM_VF_WAITING, &vcc->flags);
+	prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
+	sigd_enq(vcc, as_addparty, NULL, NULL,
+	         (struct sockaddr_atmsvc *) sockaddr);
+	if (flags & O_NONBLOCK) {
+		finish_wait(sk->sk_sleep, &wait);
+		error = -EINPROGRESS;
+		goto out;
+	}
+	DPRINTK("svc_addparty added wait queue\n");
+	while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) {
+		schedule();
+		prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
+	}
+	finish_wait(sk->sk_sleep, &wait);
+	error = xchg(&sk->sk_err_soft, 0);
+out:
+	release_sock(sk);
+	return error;
+}
+
+
+static int svc_dropparty(struct socket *sock, int ep_ref)
+{
+	DEFINE_WAIT(wait);
+	struct sock *sk = sock->sk;
+	struct atm_vcc *vcc = ATM_SD(sock);
+	int error;
+
+	lock_sock(sk);
+	set_bit(ATM_VF_WAITING, &vcc->flags);
+	prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
+	sigd_enq2(vcc, as_dropparty, NULL, NULL, NULL, NULL, ep_ref);
+	while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) {
+		schedule();
+		prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
+	}
+	finish_wait(sk->sk_sleep, &wait);
+	if (!sigd) {
+		error = -EUNATCH;
+		goto out;
+	}
+	error = xchg(&sk->sk_err_soft, 0);
+out:
+	release_sock(sk);
+	return error;
+}
+
+
+static int svc_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
+{
+ 	int error, ep_ref;
+ 	struct sockaddr_atmsvc sa;
+	struct atm_vcc *vcc = ATM_SD(sock);
+  
+	switch (cmd) {
+ 		case ATM_ADDPARTY:
+ 			if (!test_bit(ATM_VF_SESSION, &vcc->flags))
+ 				return -EINVAL;
+ 			if (copy_from_user(&sa, (void __user *) arg, sizeof(sa)))
+				return -EFAULT;
+ 			error = svc_addparty(sock, (struct sockaddr *) &sa, sizeof(sa), 0);
+ 			break;
+ 		case ATM_DROPPARTY:
+ 			if (!test_bit(ATM_VF_SESSION, &vcc->flags))
+ 				return -EINVAL;
+ 			if (copy_from_user(&ep_ref, (void __user *) arg, sizeof(int)))
+				return -EFAULT;
+ 			error = svc_dropparty(sock, ep_ref);
+ 			break;
+  		default:
+			error = vcc_ioctl(sock, cmd, arg);
+	}
+
+	return error;
+}
+
+static struct proto_ops svc_proto_ops = {
+	.family =	PF_ATMSVC,
+	.owner =	THIS_MODULE,
+
+	.release =	svc_release,
+	.bind =		svc_bind,
+	.connect =	svc_connect,
+	.socketpair =	sock_no_socketpair,
+	.accept =	svc_accept,
+	.getname =	svc_getname,
+	.poll =		vcc_poll,
+	.ioctl =	svc_ioctl,
+	.listen =	svc_listen,
+	.shutdown =	svc_shutdown,
+	.setsockopt =	svc_setsockopt,
+	.getsockopt =	svc_getsockopt,
+	.sendmsg =	vcc_sendmsg,
+	.recvmsg =	vcc_recvmsg,
+	.mmap =		sock_no_mmap,
+	.sendpage =	sock_no_sendpage,
+};
+
+
+static int svc_create(struct socket *sock,int protocol)
+{
+	int error;
+
+	sock->ops = &svc_proto_ops;
+	error = vcc_create(sock, protocol, AF_ATMSVC);
+	if (error) return error;
+	ATM_SD(sock)->local.sas_family = AF_ATMSVC;
+	ATM_SD(sock)->remote.sas_family = AF_ATMSVC;
+	return 0;
+}
+
+
+static struct net_proto_family svc_family_ops = {
+	.family = PF_ATMSVC,
+	.create = svc_create,
+	.owner = THIS_MODULE,
+};
+
+
+/*
+ *	Initialize the ATM SVC protocol family
+ */
+
+int __init atmsvc_init(void)
+{
+	return sock_register(&svc_family_ops);
+}
+
+void atmsvc_exit(void)
+{
+	sock_unregister(PF_ATMSVC);
+}