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

/* 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.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, 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)) {
		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("%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("%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("%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, 0);
	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->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("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 kern)
{
	int error;

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