[net-next-2.6.git] / net / atm / svc.c

/* 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"

static int svc_create(struct net *net, 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);

	pr_debug("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);
		pr_debug("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);
		pr_debug("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);
	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;

	pr_debug("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;
			}
			pr_debug("*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;

	pr_debug("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;
	}
	if (test_bit(ATM_VF_LISTEN, &vcc->flags)) {
		error = -EADDRINUSE;
		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);
	vcc_insert_socket(sk);
	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(sock_net(sk), newsock,0);
	if (error)
		goto out;

	new_vcc = ATM_SD(newsock);

	pr_debug("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, unsigned 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;
	}
	pr_debug("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;
}

#ifdef CONFIG_COMPAT
static int svc_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
{
	/* The definition of ATM_ADDPARTY uses the size of struct atm_iobuf.
	   But actually it takes a struct sockaddr_atmsvc, which doesn't need
	   compat handling. So all we have to do is fix up cmd... */
	if (cmd == COMPAT_ATM_ADDPARTY)
		cmd = ATM_ADDPARTY;

	if (cmd == ATM_ADDPARTY || cmd == ATM_DROPPARTY)
		return svc_ioctl(sock, cmd, arg);
	else
		return vcc_compat_ioctl(sock, cmd, arg);
}
#endif /* CONFIG_COMPAT */

static const 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,
#ifdef CONFIG_COMPAT
	.compat_ioctl =	svc_compat_ioctl,
#endif
	.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 net *net, struct socket *sock,int protocol)
{
	int error;

	if (net != &init_net)
		return -EAFNOSUPPORT;

	sock->ops = &svc_proto_ops;
	error = vcc_create(net, 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 const 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);
}
Commit	Line	Data
1da177e4 LT	1	/* net/atm/svc.c - ATM SVC sockets */
	2
	3	/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
	4
	5
	6	#include <linux/string.h>
	7	#include <linux/net.h> /* struct socket, struct proto_ops */
	8	#include <linux/errno.h> /* error codes */
	9	#include <linux/kernel.h> /* printk */
	10	#include <linux/skbuff.h>
	11	#include <linux/wait.h>
	12	#include <linux/sched.h> /* jiffies and HZ */
	13	#include <linux/fcntl.h> /* O_NONBLOCK */
	14	#include <linux/init.h>
	15	#include <linux/atm.h> /* ATM stuff */
	16	#include <linux/atmsap.h>
	17	#include <linux/atmsvc.h>
	18	#include <linux/atmdev.h>
	19	#include <linux/bitops.h>
	20	#include <net/sock.h> /* for sock_no_* */
	21	#include <asm/uaccess.h>
	22
	23	#include "resources.h"
	24	#include "common.h" /* common for PVCs and SVCs */
	25	#include "signaling.h"
	26	#include "addr.h"
	27
1b8d7ae4	28	static int svc_create(struct net net, struct socket sock,int protocol);
1da177e4	29
1da177e4 LT	30	/*
	31	* Note: since all this is still nicely synchronized with the signaling demon,
	32	* there's no need to protect sleep loops with clis. If signaling is
	33	* moved into the kernel, that would change.
	34	*/
	35
	36
	37	static int svc_shutdown(struct socket *sock,int how)
	38	{
	39	return 0;
	40	}
	41
	42
	43	static void svc_disconnect(struct atm_vcc *vcc)
	44	{
	45	DEFINE_WAIT(wait);
	46	struct sk_buff *skb;
	47	struct sock *sk = sk_atm(vcc);
	48
52240062	49	pr_debug("svc_disconnect %p\n",vcc);
1da177e4 LT	50	if (test_bit(ATM_VF_REGIS,&vcc->flags)) {
	51	prepare_to_wait(sk->sk_sleep, &wait, TASK_UNINTERRUPTIBLE);
	52	sigd_enq(vcc,as_close,NULL,NULL,NULL);
	53	while (!test_bit(ATM_VF_RELEASED,&vcc->flags) && sigd) {
	54	schedule();
	55	prepare_to_wait(sk->sk_sleep, &wait, TASK_UNINTERRUPTIBLE);
	56	}
	57	finish_wait(sk->sk_sleep, &wait);
	58	}
	59	/* beware - socket is still in use by atmsigd until the last
	60	as_indicate has been answered */
	61	while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
	62	atm_return(vcc, skb->truesize);
52240062	63	pr_debug("LISTEN REL\n");
1da177e4 LT	64	sigd_enq2(NULL,as_reject,vcc,NULL,NULL,&vcc->qos,0);
	65	dev_kfree_skb(skb);
	66	}
	67	clear_bit(ATM_VF_REGIS, &vcc->flags);
	68	/* ... may retry later */
	69	}
	70
	71
	72	static int svc_release(struct socket *sock)
	73	{
	74	struct sock *sk = sock->sk;
	75	struct atm_vcc *vcc;
	76
	77	if (sk) {
	78	vcc = ATM_SD(sock);
52240062	79	pr_debug("svc_release %p\n", vcc);
1da177e4 LT	80	clear_bit(ATM_VF_READY, &vcc->flags);
	81	/* VCC pointer is used as a reference, so we must not free it
	82	(thereby subjecting it to re-use) before all pending connections
f7d57453	83	are closed */
1da177e4 LT	84	svc_disconnect(vcc);
	85	vcc_release(sock);
	86	}
	87	return 0;
	88	}
	89
	90
	91	static int svc_bind(struct socket sock,struct sockaddr sockaddr,
	92	int sockaddr_len)
	93	{
	94	DEFINE_WAIT(wait);
	95	struct sock *sk = sock->sk;
	96	struct sockaddr_atmsvc *addr;
	97	struct atm_vcc *vcc;
	98	int error;
	99
	100	if (sockaddr_len != sizeof(struct sockaddr_atmsvc))
	101	return -EINVAL;
	102	lock_sock(sk);
	103	if (sock->state == SS_CONNECTED) {
	104	error = -EISCONN;
	105	goto out;
	106	}
	107	if (sock->state != SS_UNCONNECTED) {
	108	error = -EINVAL;
	109	goto out;
	110	}
	111	vcc = ATM_SD(sock);
1da177e4 LT	112	addr = (struct sockaddr_atmsvc *) sockaddr;
	113	if (addr->sas_family != AF_ATMSVC) {
	114	error = -EAFNOSUPPORT;
	115	goto out;
	116	}
	117	clear_bit(ATM_VF_BOUND,&vcc->flags);
	118	/* failing rebind will kill old binding */
	119	/* @@@ check memory (de)allocation on rebind */
	120	if (!test_bit(ATM_VF_HASQOS,&vcc->flags)) {
	121	error = -EBADFD;
	122	goto out;
	123	}
	124	vcc->local = *addr;
	125	set_bit(ATM_VF_WAITING, &vcc->flags);
	126	prepare_to_wait(sk->sk_sleep, &wait, TASK_UNINTERRUPTIBLE);
	127	sigd_enq(vcc,as_bind,NULL,NULL,&vcc->local);
	128	while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) {
	129	schedule();
	130	prepare_to_wait(sk->sk_sleep, &wait, TASK_UNINTERRUPTIBLE);
	131	}
	132	finish_wait(sk->sk_sleep, &wait);
	133	clear_bit(ATM_VF_REGIS,&vcc->flags); /* doesn't count */
	134	if (!sigd) {
	135	error = -EUNATCH;
	136	goto out;
	137	}
f7d57453	138	if (!sk->sk_err)
1da177e4 LT	139	set_bit(ATM_VF_BOUND,&vcc->flags);
	140	error = -sk->sk_err;
	141	out:
	142	release_sock(sk);
	143	return error;
	144	}
	145
	146
	147	static int svc_connect(struct socket sock,struct sockaddr sockaddr,
	148	int sockaddr_len,int flags)
	149	{
	150	DEFINE_WAIT(wait);
	151	struct sock *sk = sock->sk;
	152	struct sockaddr_atmsvc *addr;
	153	struct atm_vcc *vcc = ATM_SD(sock);
	154	int error;
	155
52240062	156	pr_debug("svc_connect %p\n",vcc);
1da177e4 LT	157	lock_sock(sk);
	158	if (sockaddr_len != sizeof(struct sockaddr_atmsvc)) {
	159	error = -EINVAL;
	160	goto out;
	161	}
	162
	163	switch (sock->state) {
	164	default:
	165	error = -EINVAL;
	166	goto out;
	167	case SS_CONNECTED:
	168	error = -EISCONN;
	169	goto out;
	170	case SS_CONNECTING:
	171	if (test_bit(ATM_VF_WAITING, &vcc->flags)) {
	172	error = -EALREADY;
	173	goto out;
	174	}
	175	sock->state = SS_UNCONNECTED;
	176	if (sk->sk_err) {
	177	error = -sk->sk_err;
	178	goto out;
	179	}
	180	break;
	181	case SS_UNCONNECTED:
	182	addr = (struct sockaddr_atmsvc *) sockaddr;
	183	if (addr->sas_family != AF_ATMSVC) {
	184	error = -EAFNOSUPPORT;
	185	goto out;
	186	}
	187	if (!test_bit(ATM_VF_HASQOS, &vcc->flags)) {
	188	error = -EBADFD;
	189	goto out;
	190	}
	191	if (vcc->qos.txtp.traffic_class == ATM_ANYCLASS \|\|
	192	vcc->qos.rxtp.traffic_class == ATM_ANYCLASS) {
	193	error = -EINVAL;
	194	goto out;
	195	}
	196	if (!vcc->qos.txtp.traffic_class &&
	197	!vcc->qos.rxtp.traffic_class) {
	198	error = -EINVAL;
	199	goto out;
	200	}
	201	vcc->remote = *addr;
	202	set_bit(ATM_VF_WAITING, &vcc->flags);
	203	prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
	204	sigd_enq(vcc,as_connect,NULL,NULL,&vcc->remote);
	205	if (flags & O_NONBLOCK) {
	206	finish_wait(sk->sk_sleep, &wait);
	207	sock->state = SS_CONNECTING;
	208	error = -EINPROGRESS;
	209	goto out;
	210	}
	211	error = 0;
	212	while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) {
	213	schedule();
	214	if (!signal_pending(current)) {
	215	prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
	216	continue;
	217	}
52240062	218	pr_debug("ABORT\n");
1da177e4 LT	219	/*
	220	* This is tricky:
	221	* Kernel ---close--> Demon
	222	* Kernel <--close--- Demon
f7d57453	223	* or
1da177e4 LT	224	* Kernel ---close--> Demon
	225	* Kernel <--error--- Demon
	226	* or
	227	* Kernel ---close--> Demon
	228	* Kernel <--okay---- Demon
	229	* Kernel <--close--- Demon
	230	*/
	231	sigd_enq(vcc,as_close,NULL,NULL,NULL);
	232	while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) {
	233	prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
	234	schedule();
	235	}
	236	if (!sk->sk_err)
	237	while (!test_bit(ATM_VF_RELEASED,&vcc->flags)
	238	&& sigd) {
	239	prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
	240	schedule();
	241	}
	242	clear_bit(ATM_VF_REGIS,&vcc->flags);
	243	clear_bit(ATM_VF_RELEASED,&vcc->flags);
	244	clear_bit(ATM_VF_CLOSE,&vcc->flags);
	245	/* we're gone now but may connect later */
	246	error = -EINTR;
	247	break;
	248	}
	249	finish_wait(sk->sk_sleep, &wait);
	250	if (error)
	251	goto out;
	252	if (!sigd) {
	253	error = -EUNATCH;
	254	goto out;
	255	}
	256	if (sk->sk_err) {
	257	error = -sk->sk_err;
	258	goto out;
	259	}
	260	}
	261	/*
	262	* Not supported yet
	263	*
	264	* #ifndef CONFIG_SINGLE_SIGITF
	265	*/
	266	vcc->qos.txtp.max_pcr = SELECT_TOP_PCR(vcc->qos.txtp);
	267	vcc->qos.txtp.pcr = 0;
	268	vcc->qos.txtp.min_pcr = 0;
	269	/*
	270	* #endif
	271	*/
	272	if (!(error = vcc_connect(sock, vcc->itf, vcc->vpi, vcc->vci)))
	273	sock->state = SS_CONNECTED;
	274	else
	275	(void) svc_disconnect(vcc);
	276	out:
	277	release_sock(sk);
	278	return error;
	279	}
	280
	281
	282	static int svc_listen(struct socket *sock,int backlog)
	283	{
	284	DEFINE_WAIT(wait);
	285	struct sock *sk = sock->sk;
	286	struct atm_vcc *vcc = ATM_SD(sock);
	287	int error;
288
52240062	289	pr_debug("svc_listen %p\n",vcc);
1da177e4 LT	290	lock_sock(sk);
	291	/* let server handle listen on unbound sockets */
	292	if (test_bit(ATM_VF_SESSION,&vcc->flags)) {
	293	error = -EINVAL;
	294	goto out;
	295	}
17b24b3c CW	296	if (test_bit(ATM_VF_LISTEN, &vcc->flags)) {
	297	error = -EADDRINUSE;
	298	goto out;
	299	}
1da177e4 LT	300	set_bit(ATM_VF_WAITING, &vcc->flags);
	301	prepare_to_wait(sk->sk_sleep, &wait, TASK_UNINTERRUPTIBLE);
	302	sigd_enq(vcc,as_listen,NULL,NULL,&vcc->local);
	303	while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) {
	304	schedule();
	305	prepare_to_wait(sk->sk_sleep, &wait, TASK_UNINTERRUPTIBLE);
	306	}
	307	finish_wait(sk->sk_sleep, &wait);
	308	if (!sigd) {
	309	error = -EUNATCH;
	310	goto out;
	311	}
	312	set_bit(ATM_VF_LISTEN,&vcc->flags);
17b24b3c	313	vcc_insert_socket(sk);
1da177e4 LT	314	sk->sk_max_ack_backlog = backlog > 0 ? backlog : ATM_BACKLOG_DEFAULT;
	315	error = -sk->sk_err;
	316	out:
	317	release_sock(sk);
	318	return error;
	319	}
	320
	321
	322	static int svc_accept(struct socket sock,struct socket newsock,int flags)
	323	{
	324	struct sock *sk = sock->sk;
	325	struct sk_buff *skb;
	326	struct atmsvc_msg *msg;
	327	struct atm_vcc *old_vcc = ATM_SD(sock);
	328	struct atm_vcc *new_vcc;
	329	int error;
	330
	331	lock_sock(sk);
	332
3b1e0a65	333	error = svc_create(sock_net(sk), newsock,0);
1da177e4 LT	334	if (error)
	335	goto out;
	336
	337	new_vcc = ATM_SD(newsock);
	338
52240062	339	pr_debug("svc_accept %p -> %p\n",old_vcc,new_vcc);
1da177e4 LT	340	while (1) {
	341	DEFINE_WAIT(wait);
	342
	343	prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
	344	while (!(skb = skb_dequeue(&sk->sk_receive_queue)) &&
	345	sigd) {
	346	if (test_bit(ATM_VF_RELEASED,&old_vcc->flags)) break;
	347	if (test_bit(ATM_VF_CLOSE,&old_vcc->flags)) {
	348	error = -sk->sk_err;
	349	break;
	350	}
	351	if (flags & O_NONBLOCK) {
	352	error = -EAGAIN;
	353	break;
	354	}
	355	release_sock(sk);
	356	schedule();
	357	lock_sock(sk);
	358	if (signal_pending(current)) {
	359	error = -ERESTARTSYS;
	360	break;
	361	}
	362	prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
	363	}
	364	finish_wait(sk->sk_sleep, &wait);
	365	if (error)
	366	goto out;
	367	if (!skb) {
	368	error = -EUNATCH;
	369	goto out;
	370	}
	371	msg = (struct atmsvc_msg *) skb->data;
	372	new_vcc->qos = msg->qos;
	373	set_bit(ATM_VF_HASQOS,&new_vcc->flags);
	374	new_vcc->remote = msg->svc;
	375	new_vcc->local = msg->local;
	376	new_vcc->sap = msg->sap;
	377	error = vcc_connect(newsock, msg->pvc.sap_addr.itf,
	378	msg->pvc.sap_addr.vpi, msg->pvc.sap_addr.vci);
	379	dev_kfree_skb(skb);
	380	sk->sk_ack_backlog--;
	381	if (error) {
	382	sigd_enq2(NULL,as_reject,old_vcc,NULL,NULL,
	383	&old_vcc->qos,error);
	384	error = error == -EAGAIN ? -EBUSY : error;
	385	goto out;
	386	}
	387	/* wait should be short, so we ignore the non-blocking flag */
	388	set_bit(ATM_VF_WAITING, &new_vcc->flags);
	389	prepare_to_wait(sk_atm(new_vcc)->sk_sleep, &wait, TASK_UNINTERRUPTIBLE);
	390	sigd_enq(new_vcc,as_accept,old_vcc,NULL,NULL);
	391	while (test_bit(ATM_VF_WAITING, &new_vcc->flags) && sigd) {
	392	release_sock(sk);
	393	schedule();
	394	lock_sock(sk);
	395	prepare_to_wait(sk_atm(new_vcc)->sk_sleep, &wait, TASK_UNINTERRUPTIBLE);
	396	}
	397	finish_wait(sk_atm(new_vcc)->sk_sleep, &wait);
	398	if (!sigd) {
	399	error = -EUNATCH;
	400	goto out;
	401	}
	402	if (!sk_atm(new_vcc)->sk_err)
	403	break;
404	if (sk_atm(new_vcc)->sk_err != ERESTARTSYS) {
405	error = -sk_atm(new_vcc)->sk_err;
406	goto out;
407	}
408	}
409	newsock->state = SS_CONNECTED;
410	out:
411	release_sock(sk);
412	return error;
413	}
414
415
416	static int svc_getname(struct socket sock,struct sockaddr sockaddr,
417	int *sockaddr_len,int peer)
418	{
419	struct sockaddr_atmsvc *addr;
420
421	*sockaddr_len = sizeof(struct sockaddr_atmsvc);
422	addr = (struct sockaddr_atmsvc *) sockaddr;
423	memcpy(addr,peer ? &ATM_SD(sock)->remote : &ATM_SD(sock)->local,
424	sizeof(struct sockaddr_atmsvc));
425	return 0;
426	}
427
428
429	int svc_change_qos(struct atm_vcc vcc,struct atm_qos qos)
430	{
431	struct sock *sk = sk_atm(vcc);
432	DEFINE_WAIT(wait);
433
434	set_bit(ATM_VF_WAITING, &vcc->flags);
435	prepare_to_wait(sk->sk_sleep, &wait, TASK_UNINTERRUPTIBLE);
436	sigd_enq2(vcc,as_modify,NULL,NULL,&vcc->local,qos,0);
437	while (test_bit(ATM_VF_WAITING, &vcc->flags) &&
438	!test_bit(ATM_VF_RELEASED, &vcc->flags) && sigd) {
439	schedule();
440	prepare_to_wait(sk->sk_sleep, &wait, TASK_UNINTERRUPTIBLE);
441	}
442	finish_wait(sk->sk_sleep, &wait);
443	if (!sigd) return -EUNATCH;
444	return -sk->sk_err;
445	}
446
447
448	static int svc_setsockopt(struct socket *sock, int level, int optname,
b7058842	449	char __user *optval, unsigned int optlen)
1da177e4 LT	450	{
	451	struct sock *sk = sock->sk;
	452	struct atm_vcc *vcc = ATM_SD(sock);
	453	int value, error = 0;
	454
	455	lock_sock(sk);
	456	switch (optname) {
	457	case SO_ATMSAP:
	458	if (level != SOL_ATM \|\| optlen != sizeof(struct atm_sap)) {
	459	error = -EINVAL;
	460	goto out;
	461	}
	462	if (copy_from_user(&vcc->sap, optval, optlen)) {
	463	error = -EFAULT;
	464	goto out;
	465	}
	466	set_bit(ATM_VF_HASSAP, &vcc->flags);
	467	break;
f7d57453	468	case SO_MULTIPOINT:
1da177e4 LT	469	if (level != SOL_ATM \|\| optlen != sizeof(int)) {
	470	error = -EINVAL;
	471	goto out;
	472	}
f7d57453 YH	473	if (get_user(value, (int __user *) optval)) {
f7d57453 YH	474	error = -EFAULT;
1da177e4 LT	475	goto out;
	476	}
	477	if (value == 1) {
	478	set_bit(ATM_VF_SESSION, &vcc->flags);
	479	} else if (value == 0) {
	480	clear_bit(ATM_VF_SESSION, &vcc->flags);
	481	} else {
	482	error = -EINVAL;
	483	}
f7d57453	484	break;
1da177e4 LT	485	default:
	486	error = vcc_setsockopt(sock, level, optname,
	487	optval, optlen);
	488	}
	489
	490	out:
	491	release_sock(sk);
	492	return error;
	493	}
	494
	495
	496	static int svc_getsockopt(struct socket *sock,int level,int optname,
	497	char __user optval,int __user optlen)
	498	{
	499	struct sock *sk = sock->sk;
	500	int error = 0, len;
	501
	502	lock_sock(sk);
	503	if (!__SO_LEVEL_MATCH(optname, level) \|\| optname != SO_ATMSAP) {
	504	error = vcc_getsockopt(sock, level, optname, optval, optlen);
	505	goto out;
	506	}
	507	if (get_user(len, optlen)) {
	508	error = -EFAULT;
	509	goto out;
	510	}
	511	if (len != sizeof(struct atm_sap)) {
	512	error = -EINVAL;
	513	goto out;
	514	}
	515	if (copy_to_user(optval, &ATM_SD(sock)->sap, sizeof(struct atm_sap))) {
	516	error = -EFAULT;
	517	goto out;
	518	}
	519	out:
	520	release_sock(sk);
	521	return error;
	522	}
	523
	524
	525	static int svc_addparty(struct socket sock, struct sockaddr sockaddr,
	526	int sockaddr_len, int flags)
	527	{
	528	DEFINE_WAIT(wait);
	529	struct sock *sk = sock->sk;
	530	struct atm_vcc *vcc = ATM_SD(sock);
	531	int error;
	532
	533	lock_sock(sk);
	534	set_bit(ATM_VF_WAITING, &vcc->flags);
	535	prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
	536	sigd_enq(vcc, as_addparty, NULL, NULL,
f7d57453	537	(struct sockaddr_atmsvc *) sockaddr);
1da177e4 LT	538	if (flags & O_NONBLOCK) {
	539	finish_wait(sk->sk_sleep, &wait);
	540	error = -EINPROGRESS;
	541	goto out;
	542	}
52240062	543	pr_debug("svc_addparty added wait queue\n");
1da177e4 LT	544	while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) {
	545	schedule();
	546	prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
	547	}
	548	finish_wait(sk->sk_sleep, &wait);
	549	error = xchg(&sk->sk_err_soft, 0);
	550	out:
	551	release_sock(sk);
	552	return error;
	553	}
	554
	555
	556	static int svc_dropparty(struct socket *sock, int ep_ref)
	557	{
	558	DEFINE_WAIT(wait);
	559	struct sock *sk = sock->sk;
	560	struct atm_vcc *vcc = ATM_SD(sock);
	561	int error;
	562
	563	lock_sock(sk);
	564	set_bit(ATM_VF_WAITING, &vcc->flags);
	565	prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
	566	sigd_enq2(vcc, as_dropparty, NULL, NULL, NULL, NULL, ep_ref);
	567	while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) {
	568	schedule();
	569	prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
	570	}
	571	finish_wait(sk->sk_sleep, &wait);
	572	if (!sigd) {
	573	error = -EUNATCH;
	574	goto out;
	575	}
	576	error = xchg(&sk->sk_err_soft, 0);
	577	out:
	578	release_sock(sk);
	579	return error;
	580	}
	581
	582
	583	static int svc_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
	584	{
f7d57453 YH	585	int error, ep_ref;
f7d57453 YH	586	struct sockaddr_atmsvc sa;
1da177e4	587	struct atm_vcc *vcc = ATM_SD(sock);
f7d57453	588
1da177e4	589	switch (cmd) {
f7d57453 YH	590	case ATM_ADDPARTY:
	591	if (!test_bit(ATM_VF_SESSION, &vcc->flags))
	592	return -EINVAL;
	593	if (copy_from_user(&sa, (void __user *) arg, sizeof(sa)))
1da177e4	594	return -EFAULT;
f7d57453 YH	595	error = svc_addparty(sock, (struct sockaddr *) &sa, sizeof(sa), 0);
	596	break;
	597	case ATM_DROPPARTY:
	598	if (!test_bit(ATM_VF_SESSION, &vcc->flags))
	599	return -EINVAL;
	600	if (copy_from_user(&ep_ref, (void __user *) arg, sizeof(int)))
1da177e4	601	return -EFAULT;
f7d57453 YH	602	error = svc_dropparty(sock, ep_ref);
	603	break;
	604	default:
1da177e4 LT	605	error = vcc_ioctl(sock, cmd, arg);
	606	}
	607
	608	return error;
	609	}
	610
8865c418 DW	611	#ifdef CONFIG_COMPAT
	612	static int svc_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
	613	{
	614	/* The definition of ATM_ADDPARTY uses the size of struct atm_iobuf.
	615	But actually it takes a struct sockaddr_atmsvc, which doesn't need
	616	compat handling. So all we have to do is fix up cmd... */
	617	if (cmd == COMPAT_ATM_ADDPARTY)
	618	cmd = ATM_ADDPARTY;
	619
	620	if (cmd == ATM_ADDPARTY \|\| cmd == ATM_DROPPARTY)
	621	return svc_ioctl(sock, cmd, arg);
	622	else
	623	return vcc_compat_ioctl(sock, cmd, arg);
	624	}
	625	#endif /* CONFIG_COMPAT */
	626
90ddc4f0	627	static const struct proto_ops svc_proto_ops = {
1da177e4 LT	628	.family = PF_ATMSVC,
	629	.owner = THIS_MODULE,
	630
	631	.release = svc_release,
	632	.bind = svc_bind,
	633	.connect = svc_connect,
	634	.socketpair = sock_no_socketpair,
	635	.accept = svc_accept,
	636	.getname = svc_getname,
	637	.poll = vcc_poll,
	638	.ioctl = svc_ioctl,
8865c418 DW	639	#ifdef CONFIG_COMPAT
	640	.compat_ioctl = svc_compat_ioctl,
	641	#endif
1da177e4 LT	642	.listen = svc_listen,
	643	.shutdown = svc_shutdown,
	644	.setsockopt = svc_setsockopt,
	645	.getsockopt = svc_getsockopt,
	646	.sendmsg = vcc_sendmsg,
	647	.recvmsg = vcc_recvmsg,
	648	.mmap = sock_no_mmap,
	649	.sendpage = sock_no_sendpage,
	650	};
	651
	652
1b8d7ae4	653	static int svc_create(struct net net, struct socket sock,int protocol)
1da177e4 LT	654	{
	655	int error;
	656
1b8d7ae4 EB	657	if (net != &init_net)
	658	return -EAFNOSUPPORT;
	659
1da177e4	660	sock->ops = &svc_proto_ops;
1b8d7ae4	661	error = vcc_create(net, sock, protocol, AF_ATMSVC);
1da177e4 LT	662	if (error) return error;
	663	ATM_SD(sock)->local.sas_family = AF_ATMSVC;
	664	ATM_SD(sock)->remote.sas_family = AF_ATMSVC;
	665	return 0;
	666	}
	667
	668
ec1b4cf7	669	static const struct net_proto_family svc_family_ops = {
1da177e4 LT	670	.family = PF_ATMSVC,
	671	.create = svc_create,
	672	.owner = THIS_MODULE,
	673	};
	674
	675
	676	/*
	677	* Initialize the ATM SVC protocol family
	678	*/
	679
	680	int __init atmsvc_init(void)
	681	{
	682	return sock_register(&svc_family_ops);
	683	}
	684
	685	void atmsvc_exit(void)
	686	{
	687	sock_unregister(PF_ATMSVC);
	688	}