[mirror_ubuntu-bionic-kernel.git] / net / atm / svc.c

// SPDX-License-Identifier: GPL-2.0
/* net/atm/svc.c - ATM SVC sockets */

/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */

#define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__

#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/signal.h>
#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 <linux/uaccess.h>
#include <linux/export.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,
		      int kern);

/*
 * 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("%p\n", vcc);
	if (test_bit(ATM_VF_REGIS, &vcc->flags)) {
		sigd_enq(vcc, as_close, NULL, NULL, NULL);
		for (;;) {
			prepare_to_wait(sk_sleep(sk), &wait, TASK_UNINTERRUPTIBLE);
			if (test_bit(ATM_VF_RELEASED, &vcc->flags) || !sigd)
				break;
			schedule();
		}
		finish_wait(sk_sleep(sk), &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("%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);
	sigd_enq(vcc, as_bind, NULL, NULL, &vcc->local);
	for (;;) {
		prepare_to_wait(sk_sleep(sk), &wait, TASK_UNINTERRUPTIBLE);
		if (!test_bit(ATM_VF_WAITING, &vcc->flags) || !sigd)
			break;
		schedule();
	}
	finish_wait(sk_sleep(sk), &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("%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);
		sigd_enq(vcc, as_connect, NULL, NULL, &vcc->remote);
		if (flags & O_NONBLOCK) {
			sock->state = SS_CONNECTING;
			error = -EINPROGRESS;
			goto out;
		}
		error = 0;
		prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
		while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) {
			schedule();
			if (!signal_pending(current)) {
				prepare_to_wait(sk_sleep(sk), &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_sleep(sk), &wait,
						TASK_INTERRUPTIBLE);
				schedule();
			}
			if (!sk->sk_err)
				while (!test_bit(ATM_VF_RELEASED, &vcc->flags) &&
				       sigd) {
					prepare_to_wait(sk_sleep(sk), &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_sleep(sk), &wait);
		if (error)
			goto out;
		if (!sigd) {
			error = -EUNATCH;
			goto out;
		}
		if (sk->sk_err) {
			error = -sk->sk_err;
			goto out;
		}
	}

	vcc->qos.txtp.max_pcr = SELECT_TOP_PCR(vcc->qos.txtp);
	vcc->qos.txtp.pcr = 0;
	vcc->qos.txtp.min_pcr = 0;

	error = vcc_connect(sock, vcc->itf, vcc->vpi, vcc->vci);
	if (!error)
		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("%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);
	sigd_enq(vcc, as_listen, NULL, NULL, &vcc->local);
	for (;;) {
		prepare_to_wait(sk_sleep(sk), &wait, TASK_UNINTERRUPTIBLE);
		if (!test_bit(ATM_VF_WAITING, &vcc->flags) || !sigd)
			break;
		schedule();
	}
	finish_wait(sk_sleep(sk), &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,
		      bool kern)
{
	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, kern);
	if (error)
		goto out;

	new_vcc = ATM_SD(newsock);

	pr_debug("%p -> %p\n", old_vcc, new_vcc);
	while (1) {
		DEFINE_WAIT(wait);

		prepare_to_wait(sk_sleep(sk), &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_sleep(sk), &wait,
					TASK_INTERRUPTIBLE);
		}
		finish_wait(sk_sleep(sk), &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);
		sigd_enq(new_vcc, as_accept, old_vcc, NULL, NULL);
		for (;;) {
			prepare_to_wait(sk_sleep(sk_atm(new_vcc)), &wait,
					TASK_UNINTERRUPTIBLE);
			if (!test_bit(ATM_VF_WAITING, &new_vcc->flags) || !sigd)
				break;
			release_sock(sk);
			schedule();
			lock_sock(sk);
		}
		finish_wait(sk_sleep(sk_atm(new_vcc)), &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);
	sigd_enq2(vcc, as_modify, NULL, NULL, &vcc->local, qos, 0);
	for (;;) {
		prepare_to_wait(sk_sleep(sk), &wait, TASK_UNINTERRUPTIBLE);
		if (!test_bit(ATM_VF_WAITING, &vcc->flags) ||
		    test_bit(ATM_VF_RELEASED, &vcc->flags) || !sigd) {
			break;
		}
		schedule();
	}
	finish_wait(sk_sleep(sk), &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);
	sigd_enq(vcc, as_addparty, NULL, NULL,
		 (struct sockaddr_atmsvc *) sockaddr);
	if (flags & O_NONBLOCK) {
		error = -EINPROGRESS;
		goto out;
	}
	pr_debug("added wait queue\n");
	for (;;) {
		prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
		if (!test_bit(ATM_VF_WAITING, &vcc->flags) || !sigd)
			break;
		schedule();
	}
	finish_wait(sk_sleep(sk), &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);
	sigd_enq2(vcc, as_dropparty, NULL, NULL, NULL, NULL, ep_ref);
	for (;;) {
		prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
		if (!test_bit(ATM_VF_WAITING, &vcc->flags) || !sigd)
			break;
		schedule();
	}
	finish_wait(sk_sleep(sk), &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 kern)
{
	int error;

	if (!net_eq(net, &init_net))
		return -EAFNOSUPPORT;

	sock->ops = &svc_proto_ops;
	error = vcc_create(net, sock, protocol, AF_ATMSVC, kern);
	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
b2441318	1	// SPDX-License-Identifier: GPL-2.0
1da177e4 LT	2	/* net/atm/svc.c - ATM SVC sockets */
	3
	4	/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
	5
99824461	6	#define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
1da177e4 LT	7
	8	#include <linux/string.h>
	9	#include <linux/net.h> /* struct socket, struct proto_ops */
	10	#include <linux/errno.h> /* error codes */
	11	#include <linux/kernel.h> /* printk */
	12	#include <linux/skbuff.h>
	13	#include <linux/wait.h>
174cd4b1	14	#include <linux/sched/signal.h>
1da177e4 LT	15	#include <linux/fcntl.h> /* O_NONBLOCK */
	16	#include <linux/init.h>
	17	#include <linux/atm.h> /* ATM stuff */
	18	#include <linux/atmsap.h>
	19	#include <linux/atmsvc.h>
	20	#include <linux/atmdev.h>
	21	#include <linux/bitops.h>
	22	#include <net/sock.h> /* for sock_no_* */
b7d9371b	23	#include <linux/uaccess.h>
bc3b2d7f	24	#include <linux/export.h>
1da177e4 LT	25
	26	#include "resources.h"
	27	#include "common.h" /* common for PVCs and SVCs */
	28	#include "signaling.h"
	29	#include "addr.h"
	30
b7d9371b JP	31	static int svc_create(struct net net, struct socket sock, int protocol,
b7d9371b JP	32	int kern);
1da177e4	33
1da177e4 LT	34	/*
	35	* Note: since all this is still nicely synchronized with the signaling demon,
	36	* there's no need to protect sleep loops with clis. If signaling is
	37	* moved into the kernel, that would change.
	38	*/
	39
	40
b7d9371b	41	static int svc_shutdown(struct socket *sock, int how)
1da177e4 LT	42	{
	43	return 0;
	44	}
	45
1da177e4 LT	46	static void svc_disconnect(struct atm_vcc *vcc)
	47	{
	48	DEFINE_WAIT(wait);
	49	struct sk_buff *skb;
	50	struct sock *sk = sk_atm(vcc);
	51
b7d9371b JP	52	pr_debug("%p\n", vcc);
b7d9371b JP	53	if (test_bit(ATM_VF_REGIS, &vcc->flags)) {
b7d9371b	54	sigd_enq(vcc, as_close, NULL, NULL, NULL);
de713b57 C	55	for (;;) {
	56	prepare_to_wait(sk_sleep(sk), &wait, TASK_UNINTERRUPTIBLE);
	57	if (test_bit(ATM_VF_RELEASED, &vcc->flags) \|\| !sigd)
	58	break;
1da177e4	59	schedule();
1da177e4	60	}
aa395145	61	finish_wait(sk_sleep(sk), &wait);
1da177e4 LT	62	}
	63	/* beware - socket is still in use by atmsigd until the last
	64	as_indicate has been answered */
	65	while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
	66	atm_return(vcc, skb->truesize);
52240062	67	pr_debug("LISTEN REL\n");
b7d9371b	68	sigd_enq2(NULL, as_reject, vcc, NULL, NULL, &vcc->qos, 0);
1da177e4 LT	69	dev_kfree_skb(skb);
	70	}
	71	clear_bit(ATM_VF_REGIS, &vcc->flags);
	72	/* ... may retry later */
	73	}
	74
1da177e4 LT	75	static int svc_release(struct socket *sock)
	76	{
	77	struct sock *sk = sock->sk;
	78	struct atm_vcc *vcc;
	79
b7d9371b	80	if (sk) {
1da177e4	81	vcc = ATM_SD(sock);
99824461	82	pr_debug("%p\n", vcc);
1da177e4	83	clear_bit(ATM_VF_READY, &vcc->flags);
b7d9371b JP	84	/*
	85	* VCC pointer is used as a reference,
	86	* so we must not free it (thereby subjecting it to re-use)
	87	* before all pending connections are closed
	88	*/
1da177e4 LT	89	svc_disconnect(vcc);
	90	vcc_release(sock);
	91	}
	92	return 0;
	93	}
	94
b7d9371b JP	95	static int svc_bind(struct socket sock, struct sockaddr sockaddr,
b7d9371b JP	96	int sockaddr_len)
1da177e4 LT	97	{
	98	DEFINE_WAIT(wait);
	99	struct sock *sk = sock->sk;
	100	struct sockaddr_atmsvc *addr;
	101	struct atm_vcc *vcc;
	102	int error;
	103
	104	if (sockaddr_len != sizeof(struct sockaddr_atmsvc))
	105	return -EINVAL;
	106	lock_sock(sk);
	107	if (sock->state == SS_CONNECTED) {
	108	error = -EISCONN;
	109	goto out;
	110	}
	111	if (sock->state != SS_UNCONNECTED) {
	112	error = -EINVAL;
	113	goto out;
	114	}
	115	vcc = ATM_SD(sock);
1da177e4 LT	116	addr = (struct sockaddr_atmsvc *) sockaddr;
	117	if (addr->sas_family != AF_ATMSVC) {
	118	error = -EAFNOSUPPORT;
	119	goto out;
	120	}
b7d9371b	121	clear_bit(ATM_VF_BOUND, &vcc->flags);
1da177e4 LT	122	/* failing rebind will kill old binding */
1da177e4 LT	123	/* @@@ check memory (de)allocation on rebind */
b7d9371b	124	if (!test_bit(ATM_VF_HASQOS, &vcc->flags)) {
1da177e4 LT	125	error = -EBADFD;
	126	goto out;
	127	}
	128	vcc->local = *addr;
	129	set_bit(ATM_VF_WAITING, &vcc->flags);
b7d9371b	130	sigd_enq(vcc, as_bind, NULL, NULL, &vcc->local);
de713b57	131	for (;;) {
aa395145	132	prepare_to_wait(sk_sleep(sk), &wait, TASK_UNINTERRUPTIBLE);
de713b57 C	133	if (!test_bit(ATM_VF_WAITING, &vcc->flags) \|\| !sigd)
	134	break;
	135	schedule();
1da177e4	136	}
aa395145	137	finish_wait(sk_sleep(sk), &wait);
b7d9371b	138	clear_bit(ATM_VF_REGIS, &vcc->flags); /* doesn't count */
1da177e4 LT	139	if (!sigd) {
	140	error = -EUNATCH;
	141	goto out;
	142	}
f7d57453	143	if (!sk->sk_err)
b7d9371b	144	set_bit(ATM_VF_BOUND, &vcc->flags);
1da177e4 LT	145	error = -sk->sk_err;
	146	out:
	147	release_sock(sk);
	148	return error;
	149	}
	150
b7d9371b JP	151	static int svc_connect(struct socket sock, struct sockaddr sockaddr,
b7d9371b JP	152	int sockaddr_len, int flags)
1da177e4 LT	153	{
	154	DEFINE_WAIT(wait);
	155	struct sock *sk = sock->sk;
	156	struct sockaddr_atmsvc *addr;
	157	struct atm_vcc *vcc = ATM_SD(sock);
	158	int error;
	159
b7d9371b	160	pr_debug("%p\n", vcc);
1da177e4 LT	161	lock_sock(sk);
	162	if (sockaddr_len != sizeof(struct sockaddr_atmsvc)) {
	163	error = -EINVAL;
	164	goto out;
	165	}
	166
	167	switch (sock->state) {
	168	default:
	169	error = -EINVAL;
	170	goto out;
	171	case SS_CONNECTED:
	172	error = -EISCONN;
	173	goto out;
	174	case SS_CONNECTING:
	175	if (test_bit(ATM_VF_WAITING, &vcc->flags)) {
	176	error = -EALREADY;
	177	goto out;
	178	}
	179	sock->state = SS_UNCONNECTED;
	180	if (sk->sk_err) {
	181	error = -sk->sk_err;
	182	goto out;
	183	}
	184	break;
	185	case SS_UNCONNECTED:
	186	addr = (struct sockaddr_atmsvc *) sockaddr;
	187	if (addr->sas_family != AF_ATMSVC) {
	188	error = -EAFNOSUPPORT;
	189	goto out;
	190	}
	191	if (!test_bit(ATM_VF_HASQOS, &vcc->flags)) {
	192	error = -EBADFD;
	193	goto out;
	194	}
	195	if (vcc->qos.txtp.traffic_class == ATM_ANYCLASS \|\|
	196	vcc->qos.rxtp.traffic_class == ATM_ANYCLASS) {
	197	error = -EINVAL;
	198	goto out;
	199	}
	200	if (!vcc->qos.txtp.traffic_class &&
	201	!vcc->qos.rxtp.traffic_class) {
	202	error = -EINVAL;
	203	goto out;
	204	}
	205	vcc->remote = *addr;
	206	set_bit(ATM_VF_WAITING, &vcc->flags);
b7d9371b	207	sigd_enq(vcc, as_connect, NULL, NULL, &vcc->remote);
1da177e4	208	if (flags & O_NONBLOCK) {
1da177e4 LT	209	sock->state = SS_CONNECTING;
	210	error = -EINPROGRESS;
	211	goto out;
	212	}
	213	error = 0;
de713b57	214	prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
1da177e4 LT	215	while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) {
	216	schedule();
	217	if (!signal_pending(current)) {
aa395145	218	prepare_to_wait(sk_sleep(sk), &wait,
b7d9371b	219	TASK_INTERRUPTIBLE);
1da177e4 LT	220	continue;
1da177e4 LT	221	}
52240062	222	pr_debug("ABORT\n");
1da177e4 LT	223	/*
	224	* This is tricky:
	225	* Kernel ---close--> Demon
	226	* Kernel <--close--- Demon
f7d57453	227	* or
1da177e4 LT	228	* Kernel ---close--> Demon
	229	* Kernel <--error--- Demon
	230	* or
	231	* Kernel ---close--> Demon
	232	* Kernel <--okay---- Demon
	233	* Kernel <--close--- Demon
	234	*/
b7d9371b	235	sigd_enq(vcc, as_close, NULL, NULL, NULL);
1da177e4	236	while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) {
aa395145	237	prepare_to_wait(sk_sleep(sk), &wait,
b7d9371b	238	TASK_INTERRUPTIBLE);
1da177e4 LT	239	schedule();
	240	}
	241	if (!sk->sk_err)
b7d9371b JP	242	while (!test_bit(ATM_VF_RELEASED, &vcc->flags) &&
b7d9371b JP	243	sigd) {
aa395145	244	prepare_to_wait(sk_sleep(sk), &wait,
b7d9371b	245	TASK_INTERRUPTIBLE);
1da177e4 LT	246	schedule();
1da177e4 LT	247	}
b7d9371b JP	248	clear_bit(ATM_VF_REGIS, &vcc->flags);
	249	clear_bit(ATM_VF_RELEASED, &vcc->flags);
	250	clear_bit(ATM_VF_CLOSE, &vcc->flags);
1da177e4 LT	251	/* we're gone now but may connect later */
	252	error = -EINTR;
	253	break;
	254	}
aa395145	255	finish_wait(sk_sleep(sk), &wait);
1da177e4 LT	256	if (error)
	257	goto out;
	258	if (!sigd) {
	259	error = -EUNATCH;
	260	goto out;
	261	}
	262	if (sk->sk_err) {
	263	error = -sk->sk_err;
	264	goto out;
	265	}
	266	}
391296c9	267
1da177e4 LT	268	vcc->qos.txtp.max_pcr = SELECT_TOP_PCR(vcc->qos.txtp);
	269	vcc->qos.txtp.pcr = 0;
	270	vcc->qos.txtp.min_pcr = 0;
391296c9	271
b7d9371b JP	272	error = vcc_connect(sock, vcc->itf, vcc->vpi, vcc->vci);
b7d9371b JP	273	if (!error)
1da177e4 LT	274	sock->state = SS_CONNECTED;
1da177e4 LT	275	else
b7d9371b	276	(void)svc_disconnect(vcc);
1da177e4 LT	277	out:
	278	release_sock(sk);
	279	return error;
	280	}
	281
b7d9371b	282	static int svc_listen(struct socket *sock, int backlog)
1da177e4 LT	283	{
	284	DEFINE_WAIT(wait);
	285	struct sock *sk = sock->sk;
	286	struct atm_vcc *vcc = ATM_SD(sock);
	287	int error;
	288
99824461	289	pr_debug("%p\n", vcc);
1da177e4 LT	290	lock_sock(sk);
1da177e4 LT	291	/* let server handle listen on unbound sockets */
b7d9371b	292	if (test_bit(ATM_VF_SESSION, &vcc->flags)) {
1da177e4 LT	293	error = -EINVAL;
	294	goto out;
	295	}
17b24b3c CW	296	if (test_bit(ATM_VF_LISTEN, &vcc->flags)) {
	297	error = -EADDRINUSE;
	298	goto out;
b7d9371b	299	}
1da177e4	300	set_bit(ATM_VF_WAITING, &vcc->flags);
b7d9371b	301	sigd_enq(vcc, as_listen, NULL, NULL, &vcc->local);
de713b57	302	for (;;) {
aa395145	303	prepare_to_wait(sk_sleep(sk), &wait, TASK_UNINTERRUPTIBLE);
de713b57 C	304	if (!test_bit(ATM_VF_WAITING, &vcc->flags) \|\| !sigd)
	305	break;
	306	schedule();
1da177e4	307	}
aa395145	308	finish_wait(sk_sleep(sk), &wait);
1da177e4 LT	309	if (!sigd) {
	310	error = -EUNATCH;
	311	goto out;
	312	}
b7d9371b	313	set_bit(ATM_VF_LISTEN, &vcc->flags);
17b24b3c	314	vcc_insert_socket(sk);
1da177e4 LT	315	sk->sk_max_ack_backlog = backlog > 0 ? backlog : ATM_BACKLOG_DEFAULT;
	316	error = -sk->sk_err;
	317	out:
	318	release_sock(sk);
	319	return error;
	320	}
	321
cdfbabfb DH	322	static int svc_accept(struct socket sock, struct socket newsock, int flags,
cdfbabfb DH	323	bool kern)
1da177e4 LT	324	{
	325	struct sock *sk = sock->sk;
	326	struct sk_buff *skb;
	327	struct atmsvc_msg *msg;
	328	struct atm_vcc *old_vcc = ATM_SD(sock);
	329	struct atm_vcc *new_vcc;
	330	int error;
	331
	332	lock_sock(sk);
	333
cdfbabfb	334	error = svc_create(sock_net(sk), newsock, 0, kern);
1da177e4 LT	335	if (error)
	336	goto out;
	337
	338	new_vcc = ATM_SD(newsock);
	339
99824461	340	pr_debug("%p -> %p\n", old_vcc, new_vcc);
1da177e4 LT	341	while (1) {
	342	DEFINE_WAIT(wait);
	343
aa395145	344	prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
1da177e4 LT	345	while (!(skb = skb_dequeue(&sk->sk_receive_queue)) &&
1da177e4 LT	346	sigd) {
b7d9371b JP	347	if (test_bit(ATM_VF_RELEASED, &old_vcc->flags))
	348	break;
	349	if (test_bit(ATM_VF_CLOSE, &old_vcc->flags)) {
1da177e4 LT	350	error = -sk->sk_err;
	351	break;
	352	}
	353	if (flags & O_NONBLOCK) {
	354	error = -EAGAIN;
	355	break;
	356	}
	357	release_sock(sk);
	358	schedule();
	359	lock_sock(sk);
	360	if (signal_pending(current)) {
	361	error = -ERESTARTSYS;
	362	break;
	363	}
aa395145	364	prepare_to_wait(sk_sleep(sk), &wait,
b7d9371b	365	TASK_INTERRUPTIBLE);
1da177e4	366	}
aa395145	367	finish_wait(sk_sleep(sk), &wait);
1da177e4 LT	368	if (error)
	369	goto out;
	370	if (!skb) {
	371	error = -EUNATCH;
	372	goto out;
	373	}
b7d9371b	374	msg = (struct atmsvc_msg *)skb->data;
1da177e4	375	new_vcc->qos = msg->qos;
b7d9371b	376	set_bit(ATM_VF_HASQOS, &new_vcc->flags);
1da177e4 LT	377	new_vcc->remote = msg->svc;
	378	new_vcc->local = msg->local;
	379	new_vcc->sap = msg->sap;
	380	error = vcc_connect(newsock, msg->pvc.sap_addr.itf,
b7d9371b JP	381	msg->pvc.sap_addr.vpi,
b7d9371b JP	382	msg->pvc.sap_addr.vci);
1da177e4 LT	383	dev_kfree_skb(skb);
	384	sk->sk_ack_backlog--;
	385	if (error) {
b7d9371b JP	386	sigd_enq2(NULL, as_reject, old_vcc, NULL, NULL,
b7d9371b JP	387	&old_vcc->qos, error);
1da177e4 LT	388	error = error == -EAGAIN ? -EBUSY : error;
	389	goto out;
	390	}
	391	/* wait should be short, so we ignore the non-blocking flag */
	392	set_bit(ATM_VF_WAITING, &new_vcc->flags);
b7d9371b	393	sigd_enq(new_vcc, as_accept, old_vcc, NULL, NULL);
de713b57 C	394	for (;;) {
	395	prepare_to_wait(sk_sleep(sk_atm(new_vcc)), &wait,
	396	TASK_UNINTERRUPTIBLE);
	397	if (!test_bit(ATM_VF_WAITING, &new_vcc->flags) \|\| !sigd)
	398	break;
1da177e4 LT	399	release_sock(sk);
	400	schedule();
	401	lock_sock(sk);
1da177e4	402	}
aa395145	403	finish_wait(sk_sleep(sk_atm(new_vcc)), &wait);
1da177e4 LT	404	if (!sigd) {
	405	error = -EUNATCH;
	406	goto out;
	407	}
	408	if (!sk_atm(new_vcc)->sk_err)
	409	break;
	410	if (sk_atm(new_vcc)->sk_err != ERESTARTSYS) {
	411	error = -sk_atm(new_vcc)->sk_err;
	412	goto out;
	413	}
	414	}
	415	newsock->state = SS_CONNECTED;
	416	out:
	417	release_sock(sk);
	418	return error;
	419	}
	420
b7d9371b JP	421	static int svc_getname(struct socket sock, struct sockaddr sockaddr,
b7d9371b JP	422	int *sockaddr_len, int peer)
1da177e4 LT	423	{
	424	struct sockaddr_atmsvc *addr;
	425
	426	*sockaddr_len = sizeof(struct sockaddr_atmsvc);
	427	addr = (struct sockaddr_atmsvc *) sockaddr;
b7d9371b JP	428	memcpy(addr, peer ? &ATM_SD(sock)->remote : &ATM_SD(sock)->local,
b7d9371b JP	429	sizeof(struct sockaddr_atmsvc));
1da177e4 LT	430	return 0;
	431	}
	432
b7d9371b	433	int svc_change_qos(struct atm_vcc vcc, struct atm_qos qos)
1da177e4 LT	434	{
	435	struct sock *sk = sk_atm(vcc);
	436	DEFINE_WAIT(wait);
	437
	438	set_bit(ATM_VF_WAITING, &vcc->flags);
b7d9371b	439	sigd_enq2(vcc, as_modify, NULL, NULL, &vcc->local, qos, 0);
de713b57	440	for (;;) {
aa395145	441	prepare_to_wait(sk_sleep(sk), &wait, TASK_UNINTERRUPTIBLE);
de713b57 C	442	if (!test_bit(ATM_VF_WAITING, &vcc->flags) \|\|
	443	test_bit(ATM_VF_RELEASED, &vcc->flags) \|\| !sigd) {
	444	break;
	445	}
	446	schedule();
1da177e4	447	}
aa395145	448	finish_wait(sk_sleep(sk), &wait);
b7d9371b JP	449	if (!sigd)
b7d9371b JP	450	return -EUNATCH;
1da177e4 LT	451	return -sk->sk_err;
	452	}
	453
1da177e4	454	static int svc_setsockopt(struct socket *sock, int level, int optname,
b7058842	455	char __user *optval, unsigned int optlen)
1da177e4 LT	456	{
	457	struct sock *sk = sock->sk;
	458	struct atm_vcc *vcc = ATM_SD(sock);
	459	int value, error = 0;
	460
	461	lock_sock(sk);
	462	switch (optname) {
b7d9371b JP	463	case SO_ATMSAP:
	464	if (level != SOL_ATM \|\| optlen != sizeof(struct atm_sap)) {
	465	error = -EINVAL;
	466	goto out;
	467	}
	468	if (copy_from_user(&vcc->sap, optval, optlen)) {
	469	error = -EFAULT;
	470	goto out;
	471	}
	472	set_bit(ATM_VF_HASSAP, &vcc->flags);
	473	break;
	474	case SO_MULTIPOINT:
	475	if (level != SOL_ATM \|\| optlen != sizeof(int)) {
	476	error = -EINVAL;
	477	goto out;
	478	}
	479	if (get_user(value, (int __user *)optval)) {
	480	error = -EFAULT;
	481	goto out;
	482	}
	483	if (value == 1)
	484	set_bit(ATM_VF_SESSION, &vcc->flags);
	485	else if (value == 0)
	486	clear_bit(ATM_VF_SESSION, &vcc->flags);
	487	else
	488	error = -EINVAL;
	489	break;
	490	default:
	491	error = vcc_setsockopt(sock, level, optname, optval, optlen);
1da177e4 LT	492	}
	493
	494	out:
	495	release_sock(sk);
	496	return error;
	497	}
	498
b7d9371b JP	499	static int svc_getsockopt(struct socket *sock, int level, int optname,
b7d9371b JP	500	char __user optval, int __user optlen)
1da177e4 LT	501	{
	502	struct sock *sk = sock->sk;
	503	int error = 0, len;
	504
	505	lock_sock(sk);
	506	if (!__SO_LEVEL_MATCH(optname, level) \|\| optname != SO_ATMSAP) {
	507	error = vcc_getsockopt(sock, level, optname, optval, optlen);
	508	goto out;
	509	}
	510	if (get_user(len, optlen)) {
	511	error = -EFAULT;
	512	goto out;
	513	}
	514	if (len != sizeof(struct atm_sap)) {
	515	error = -EINVAL;
	516	goto out;
	517	}
	518	if (copy_to_user(optval, &ATM_SD(sock)->sap, sizeof(struct atm_sap))) {
	519	error = -EFAULT;
	520	goto out;
	521	}
	522	out:
	523	release_sock(sk);
	524	return error;
	525	}
	526
1da177e4 LT	527	static int svc_addparty(struct socket sock, struct sockaddr sockaddr,
	528	int sockaddr_len, int flags)
	529	{
	530	DEFINE_WAIT(wait);
	531	struct sock *sk = sock->sk;
	532	struct atm_vcc *vcc = ATM_SD(sock);
	533	int error;
	534
	535	lock_sock(sk);
	536	set_bit(ATM_VF_WAITING, &vcc->flags);
1da177e4	537	sigd_enq(vcc, as_addparty, NULL, NULL,
f7d57453	538	(struct sockaddr_atmsvc *) sockaddr);
1da177e4	539	if (flags & O_NONBLOCK) {
1da177e4 LT	540	error = -EINPROGRESS;
	541	goto out;
	542	}
99824461	543	pr_debug("added wait queue\n");
de713b57	544	for (;;) {
aa395145	545	prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
de713b57 C	546	if (!test_bit(ATM_VF_WAITING, &vcc->flags) \|\| !sigd)
	547	break;
	548	schedule();
1da177e4	549	}
aa395145	550	finish_wait(sk_sleep(sk), &wait);
c685293a	551	error = -xchg(&sk->sk_err_soft, 0);
1da177e4 LT	552	out:
	553	release_sock(sk);
	554	return error;
	555	}
	556
1da177e4 LT	557	static int svc_dropparty(struct socket *sock, int ep_ref)
	558	{
	559	DEFINE_WAIT(wait);
	560	struct sock *sk = sock->sk;
	561	struct atm_vcc *vcc = ATM_SD(sock);
	562	int error;
	563
	564	lock_sock(sk);
	565	set_bit(ATM_VF_WAITING, &vcc->flags);
1da177e4	566	sigd_enq2(vcc, as_dropparty, NULL, NULL, NULL, NULL, ep_ref);
de713b57	567	for (;;) {
aa395145	568	prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
de713b57 C	569	if (!test_bit(ATM_VF_WAITING, &vcc->flags) \|\| !sigd)
	570	break;
	571	schedule();
1da177e4	572	}
aa395145	573	finish_wait(sk_sleep(sk), &wait);
1da177e4 LT	574	if (!sigd) {
	575	error = -EUNATCH;
	576	goto out;
	577	}
c685293a	578	error = -xchg(&sk->sk_err_soft, 0);
1da177e4 LT	579	out:
	580	release_sock(sk);
	581	return error;
	582	}
	583
1da177e4 LT	584	static int svc_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1da177e4 LT	585	{
f7d57453 YH	586	int error, ep_ref;
f7d57453 YH	587	struct sockaddr_atmsvc sa;
1da177e4	588	struct atm_vcc *vcc = ATM_SD(sock);
f7d57453	589
1da177e4	590	switch (cmd) {
b7d9371b JP	591	case ATM_ADDPARTY:
	592	if (!test_bit(ATM_VF_SESSION, &vcc->flags))
	593	return -EINVAL;
	594	if (copy_from_user(&sa, (void __user *) arg, sizeof(sa)))
	595	return -EFAULT;
	596	error = svc_addparty(sock, (struct sockaddr *)&sa, sizeof(sa),
	597	0);
	598	break;
	599	case ATM_DROPPARTY:
	600	if (!test_bit(ATM_VF_SESSION, &vcc->flags))
	601	return -EINVAL;
	602	if (copy_from_user(&ep_ref, (void __user *) arg, sizeof(int)))
	603	return -EFAULT;
	604	error = svc_dropparty(sock, ep_ref);
	605	break;
	606	default:
	607	error = vcc_ioctl(sock, cmd, arg);
1da177e4 LT	608	}
	609
	610	return error;
	611	}
	612
8865c418	613	#ifdef CONFIG_COMPAT
b7d9371b JP	614	static int svc_compat_ioctl(struct socket *sock, unsigned int cmd,
b7d9371b JP	615	unsigned long arg)
8865c418 DW	616	{
	617	/* The definition of ATM_ADDPARTY uses the size of struct atm_iobuf.
	618	But actually it takes a struct sockaddr_atmsvc, which doesn't need
	619	compat handling. So all we have to do is fix up cmd... */
	620	if (cmd == COMPAT_ATM_ADDPARTY)
	621	cmd = ATM_ADDPARTY;
	622
	623	if (cmd == ATM_ADDPARTY \|\| cmd == ATM_DROPPARTY)
	624	return svc_ioctl(sock, cmd, arg);
	625	else
	626	return vcc_compat_ioctl(sock, cmd, arg);
	627	}
	628	#endif /* CONFIG_COMPAT */
	629
90ddc4f0	630	static const struct proto_ops svc_proto_ops = {
1da177e4 LT	631	.family = PF_ATMSVC,
	632	.owner = THIS_MODULE,
	633
	634	.release = svc_release,
	635	.bind = svc_bind,
	636	.connect = svc_connect,
	637	.socketpair = sock_no_socketpair,
	638	.accept = svc_accept,
	639	.getname = svc_getname,
	640	.poll = vcc_poll,
	641	.ioctl = svc_ioctl,
8865c418 DW	642	#ifdef CONFIG_COMPAT
	643	.compat_ioctl = svc_compat_ioctl,
	644	#endif
1da177e4 LT	645	.listen = svc_listen,
	646	.shutdown = svc_shutdown,
	647	.setsockopt = svc_setsockopt,
	648	.getsockopt = svc_getsockopt,
	649	.sendmsg = vcc_sendmsg,
	650	.recvmsg = vcc_recvmsg,
	651	.mmap = sock_no_mmap,
	652	.sendpage = sock_no_sendpage,
	653	};
	654
	655
3f378b68 EP	656	static int svc_create(struct net net, struct socket sock, int protocol,
3f378b68 EP	657	int kern)
1da177e4 LT	658	{
	659	int error;
	660
09ad9bc7	661	if (!net_eq(net, &init_net))
1b8d7ae4 EB	662	return -EAFNOSUPPORT;
1b8d7ae4 EB	663
1da177e4	664	sock->ops = &svc_proto_ops;
11aa9c28	665	error = vcc_create(net, sock, protocol, AF_ATMSVC, kern);
b7d9371b JP	666	if (error)
b7d9371b JP	667	return error;
1da177e4 LT	668	ATM_SD(sock)->local.sas_family = AF_ATMSVC;
	669	ATM_SD(sock)->remote.sas_family = AF_ATMSVC;
	670	return 0;
	671	}
	672
ec1b4cf7	673	static const struct net_proto_family svc_family_ops = {
1da177e4 LT	674	.family = PF_ATMSVC,
	675	.create = svc_create,
	676	.owner = THIS_MODULE,
	677	};
	678
	679
	680	/*
	681	* Initialize the ATM SVC protocol family
	682	*/
	683
	684	int __init atmsvc_init(void)
	685	{
	686	return sock_register(&svc_family_ops);
	687	}
	688
	689	void atmsvc_exit(void)
	690	{
	691	sock_unregister(PF_ATMSVC);
	692	}