[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 */

#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 <linux/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_sleep(sk), &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_sleep(sk), &wait,
					TASK_UNINTERRUPTIBLE);
		}
		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);
	prepare_to_wait(sk_sleep(sk), &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_sleep(sk), &wait, TASK_UNINTERRUPTIBLE);
	}
	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);
		prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
		sigd_enq(vcc, as_connect, NULL, NULL, &vcc->remote);
		if (flags & O_NONBLOCK) {
			finish_wait(sk_sleep(sk), &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_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;
		}
	}
/*
 * 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
 */
	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);
	prepare_to_wait(sk_sleep(sk), &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_sleep(sk), &wait, TASK_UNINTERRUPTIBLE);
	}
	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)
{
	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_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);
		prepare_to_wait(sk_sleep(sk_atm(new_vcc)), &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_sleep(sk_atm(new_vcc)), &wait,
					TASK_UNINTERRUPTIBLE);
		}
		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);
	prepare_to_wait(sk_sleep(sk), &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_sleep(sk), &wait, TASK_UNINTERRUPTIBLE);
	}
	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);
	prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
	sigd_enq(vcc, as_addparty, NULL, NULL,
		 (struct sockaddr_atmsvc *) sockaddr);
	if (flags & O_NONBLOCK) {
		finish_wait(sk_sleep(sk), &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_sleep(sk), &wait, TASK_INTERRUPTIBLE);
	}
	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);
	prepare_to_wait(sk_sleep(sk), &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_sleep(sk), &wait, TASK_INTERRUPTIBLE);
	}
	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);
	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_* */
b7d9371b	22	#include <linux/uaccess.h>
1da177e4 LT	23
	24	#include "resources.h"
	25	#include "common.h" /* common for PVCs and SVCs */
	26	#include "signaling.h"
	27	#include "addr.h"
	28
b7d9371b JP	29	static int svc_create(struct net net, struct socket sock, int protocol,
b7d9371b JP	30	int kern);
1da177e4	31
1da177e4 LT	32	/*
	33	* Note: since all this is still nicely synchronized with the signaling demon,
	34	* there's no need to protect sleep loops with clis. If signaling is
	35	* moved into the kernel, that would change.
	36	*/
	37
	38
b7d9371b	39	static int svc_shutdown(struct socket *sock, int how)
1da177e4 LT	40	{
	41	return 0;
	42	}
	43
1da177e4 LT	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
b7d9371b JP	50	pr_debug("%p\n", vcc);
b7d9371b JP	51	if (test_bit(ATM_VF_REGIS, &vcc->flags)) {
aa395145	52	prepare_to_wait(sk_sleep(sk), &wait, TASK_UNINTERRUPTIBLE);
b7d9371b JP	53	sigd_enq(vcc, as_close, NULL, NULL, NULL);
b7d9371b JP	54	while (!test_bit(ATM_VF_RELEASED, &vcc->flags) && sigd) {
1da177e4	55	schedule();
aa395145	56	prepare_to_wait(sk_sleep(sk), &wait,
b7d9371b	57	TASK_UNINTERRUPTIBLE);
1da177e4	58	}
aa395145	59	finish_wait(sk_sleep(sk), &wait);
1da177e4 LT	60	}
	61	/* beware - socket is still in use by atmsigd until the last
	62	as_indicate has been answered */
	63	while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
	64	atm_return(vcc, skb->truesize);
52240062	65	pr_debug("LISTEN REL\n");
b7d9371b	66	sigd_enq2(NULL, as_reject, vcc, NULL, NULL, &vcc->qos, 0);
1da177e4 LT	67	dev_kfree_skb(skb);
	68	}
	69	clear_bit(ATM_VF_REGIS, &vcc->flags);
	70	/* ... may retry later */
	71	}
	72
1da177e4 LT	73	static int svc_release(struct socket *sock)
	74	{
	75	struct sock *sk = sock->sk;
	76	struct atm_vcc *vcc;
	77
b7d9371b	78	if (sk) {
1da177e4	79	vcc = ATM_SD(sock);
99824461	80	pr_debug("%p\n", vcc);
1da177e4	81	clear_bit(ATM_VF_READY, &vcc->flags);
b7d9371b JP	82	/*
	83	* VCC pointer is used as a reference,
	84	* so we must not free it (thereby subjecting it to re-use)
	85	* before all pending connections are closed
	86	*/
1da177e4 LT	87	svc_disconnect(vcc);
	88	vcc_release(sock);
	89	}
	90	return 0;
	91	}
	92
b7d9371b JP	93	static int svc_bind(struct socket sock, struct sockaddr sockaddr,
b7d9371b JP	94	int sockaddr_len)
1da177e4 LT	95	{
	96	DEFINE_WAIT(wait);
	97	struct sock *sk = sock->sk;
	98	struct sockaddr_atmsvc *addr;
	99	struct atm_vcc *vcc;
	100	int error;
	101
	102	if (sockaddr_len != sizeof(struct sockaddr_atmsvc))
	103	return -EINVAL;
	104	lock_sock(sk);
	105	if (sock->state == SS_CONNECTED) {
	106	error = -EISCONN;
	107	goto out;
	108	}
	109	if (sock->state != SS_UNCONNECTED) {
	110	error = -EINVAL;
	111	goto out;
	112	}
	113	vcc = ATM_SD(sock);
1da177e4 LT	114	addr = (struct sockaddr_atmsvc *) sockaddr;
	115	if (addr->sas_family != AF_ATMSVC) {
	116	error = -EAFNOSUPPORT;
	117	goto out;
	118	}
b7d9371b	119	clear_bit(ATM_VF_BOUND, &vcc->flags);
1da177e4 LT	120	/* failing rebind will kill old binding */
1da177e4 LT	121	/* @@@ check memory (de)allocation on rebind */
b7d9371b	122	if (!test_bit(ATM_VF_HASQOS, &vcc->flags)) {
1da177e4 LT	123	error = -EBADFD;
	124	goto out;
	125	}
	126	vcc->local = *addr;
	127	set_bit(ATM_VF_WAITING, &vcc->flags);
aa395145	128	prepare_to_wait(sk_sleep(sk), &wait, TASK_UNINTERRUPTIBLE);
b7d9371b	129	sigd_enq(vcc, as_bind, NULL, NULL, &vcc->local);
1da177e4 LT	130	while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) {
1da177e4 LT	131	schedule();
aa395145	132	prepare_to_wait(sk_sleep(sk), &wait, TASK_UNINTERRUPTIBLE);
1da177e4	133	}
aa395145	134	finish_wait(sk_sleep(sk), &wait);
b7d9371b	135	clear_bit(ATM_VF_REGIS, &vcc->flags); /* doesn't count */
1da177e4 LT	136	if (!sigd) {
	137	error = -EUNATCH;
	138	goto out;
	139	}
f7d57453	140	if (!sk->sk_err)
b7d9371b	141	set_bit(ATM_VF_BOUND, &vcc->flags);
1da177e4 LT	142	error = -sk->sk_err;
	143	out:
	144	release_sock(sk);
	145	return error;
	146	}
	147
b7d9371b JP	148	static int svc_connect(struct socket sock, struct sockaddr sockaddr,
b7d9371b JP	149	int sockaddr_len, int flags)
1da177e4 LT	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
b7d9371b	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);
aa395145	204	prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
b7d9371b	205	sigd_enq(vcc, as_connect, NULL, NULL, &vcc->remote);
1da177e4	206	if (flags & O_NONBLOCK) {
aa395145	207	finish_wait(sk_sleep(sk), &wait);
1da177e4 LT	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)) {
aa395145	216	prepare_to_wait(sk_sleep(sk), &wait,
b7d9371b	217	TASK_INTERRUPTIBLE);
1da177e4 LT	218	continue;
1da177e4 LT	219	}
52240062	220	pr_debug("ABORT\n");
1da177e4 LT	221	/*
	222	* This is tricky:
	223	* Kernel ---close--> Demon
	224	* Kernel <--close--- Demon
f7d57453	225	* or
1da177e4 LT	226	* Kernel ---close--> Demon
	227	* Kernel <--error--- Demon
	228	* or
	229	* Kernel ---close--> Demon
	230	* Kernel <--okay---- Demon
	231	* Kernel <--close--- Demon
	232	*/
b7d9371b	233	sigd_enq(vcc, as_close, NULL, NULL, NULL);
1da177e4	234	while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) {
aa395145	235	prepare_to_wait(sk_sleep(sk), &wait,
b7d9371b	236	TASK_INTERRUPTIBLE);
1da177e4 LT	237	schedule();
	238	}
	239	if (!sk->sk_err)
b7d9371b JP	240	while (!test_bit(ATM_VF_RELEASED, &vcc->flags) &&
b7d9371b JP	241	sigd) {
aa395145	242	prepare_to_wait(sk_sleep(sk), &wait,
b7d9371b	243	TASK_INTERRUPTIBLE);
1da177e4 LT	244	schedule();
1da177e4 LT	245	}
b7d9371b JP	246	clear_bit(ATM_VF_REGIS, &vcc->flags);
	247	clear_bit(ATM_VF_RELEASED, &vcc->flags);
	248	clear_bit(ATM_VF_CLOSE, &vcc->flags);
1da177e4 LT	249	/* we're gone now but may connect later */
	250	error = -EINTR;
	251	break;
	252	}
aa395145	253	finish_wait(sk_sleep(sk), &wait);
1da177e4 LT	254	if (error)
	255	goto out;
	256	if (!sigd) {
	257	error = -EUNATCH;
	258	goto out;
	259	}
	260	if (sk->sk_err) {
	261	error = -sk->sk_err;
	262	goto out;
	263	}
	264	}
	265	/*
	266	* Not supported yet
	267	*
	268	* #ifndef CONFIG_SINGLE_SIGITF
	269	*/
	270	vcc->qos.txtp.max_pcr = SELECT_TOP_PCR(vcc->qos.txtp);
	271	vcc->qos.txtp.pcr = 0;
	272	vcc->qos.txtp.min_pcr = 0;
	273	/*
	274	* #endif
	275	*/
b7d9371b JP	276	error = vcc_connect(sock, vcc->itf, vcc->vpi, vcc->vci);
b7d9371b JP	277	if (!error)
1da177e4 LT	278	sock->state = SS_CONNECTED;
1da177e4 LT	279	else
b7d9371b	280	(void)svc_disconnect(vcc);
1da177e4 LT	281	out:
	282	release_sock(sk);
	283	return error;
	284	}
	285
b7d9371b	286	static int svc_listen(struct socket *sock, int backlog)
1da177e4 LT	287	{
	288	DEFINE_WAIT(wait);
	289	struct sock *sk = sock->sk;
	290	struct atm_vcc *vcc = ATM_SD(sock);
	291	int error;
	292
99824461	293	pr_debug("%p\n", vcc);
1da177e4 LT	294	lock_sock(sk);
1da177e4 LT	295	/* let server handle listen on unbound sockets */
b7d9371b	296	if (test_bit(ATM_VF_SESSION, &vcc->flags)) {
1da177e4 LT	297	error = -EINVAL;
	298	goto out;
	299	}
17b24b3c CW	300	if (test_bit(ATM_VF_LISTEN, &vcc->flags)) {
	301	error = -EADDRINUSE;
	302	goto out;
b7d9371b	303	}
1da177e4	304	set_bit(ATM_VF_WAITING, &vcc->flags);
aa395145	305	prepare_to_wait(sk_sleep(sk), &wait, TASK_UNINTERRUPTIBLE);
b7d9371b	306	sigd_enq(vcc, as_listen, NULL, NULL, &vcc->local);
1da177e4 LT	307	while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) {
1da177e4 LT	308	schedule();
aa395145	309	prepare_to_wait(sk_sleep(sk), &wait, TASK_UNINTERRUPTIBLE);
1da177e4	310	}
aa395145	311	finish_wait(sk_sleep(sk), &wait);
1da177e4 LT	312	if (!sigd) {
	313	error = -EUNATCH;
	314	goto out;
	315	}
b7d9371b	316	set_bit(ATM_VF_LISTEN, &vcc->flags);
17b24b3c	317	vcc_insert_socket(sk);
1da177e4 LT	318	sk->sk_max_ack_backlog = backlog > 0 ? backlog : ATM_BACKLOG_DEFAULT;
	319	error = -sk->sk_err;
	320	out:
	321	release_sock(sk);
	322	return error;
	323	}
	324
b7d9371b	325	static int svc_accept(struct socket sock, struct socket newsock, int flags)
1da177e4 LT	326	{
	327	struct sock *sk = sock->sk;
	328	struct sk_buff *skb;
	329	struct atmsvc_msg *msg;
	330	struct atm_vcc *old_vcc = ATM_SD(sock);
	331	struct atm_vcc *new_vcc;
	332	int error;
	333
	334	lock_sock(sk);
	335
3f378b68	336	error = svc_create(sock_net(sk), newsock, 0, 0);
1da177e4 LT	337	if (error)
	338	goto out;
	339
	340	new_vcc = ATM_SD(newsock);
	341
99824461	342	pr_debug("%p -> %p\n", old_vcc, new_vcc);
1da177e4 LT	343	while (1) {
	344	DEFINE_WAIT(wait);
	345
aa395145	346	prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
1da177e4 LT	347	while (!(skb = skb_dequeue(&sk->sk_receive_queue)) &&
1da177e4 LT	348	sigd) {
b7d9371b JP	349	if (test_bit(ATM_VF_RELEASED, &old_vcc->flags))
	350	break;
	351	if (test_bit(ATM_VF_CLOSE, &old_vcc->flags)) {
1da177e4 LT	352	error = -sk->sk_err;
	353	break;
	354	}
	355	if (flags & O_NONBLOCK) {
	356	error = -EAGAIN;
	357	break;
	358	}
	359	release_sock(sk);
	360	schedule();
	361	lock_sock(sk);
	362	if (signal_pending(current)) {
	363	error = -ERESTARTSYS;
	364	break;
	365	}
aa395145	366	prepare_to_wait(sk_sleep(sk), &wait,
b7d9371b	367	TASK_INTERRUPTIBLE);
1da177e4	368	}
aa395145	369	finish_wait(sk_sleep(sk), &wait);
1da177e4 LT	370	if (error)
	371	goto out;
	372	if (!skb) {
	373	error = -EUNATCH;
	374	goto out;
	375	}
b7d9371b	376	msg = (struct atmsvc_msg *)skb->data;
1da177e4	377	new_vcc->qos = msg->qos;
b7d9371b	378	set_bit(ATM_VF_HASQOS, &new_vcc->flags);
1da177e4 LT	379	new_vcc->remote = msg->svc;
	380	new_vcc->local = msg->local;
	381	new_vcc->sap = msg->sap;
	382	error = vcc_connect(newsock, msg->pvc.sap_addr.itf,
b7d9371b JP	383	msg->pvc.sap_addr.vpi,
b7d9371b JP	384	msg->pvc.sap_addr.vci);
1da177e4 LT	385	dev_kfree_skb(skb);
	386	sk->sk_ack_backlog--;
	387	if (error) {
b7d9371b JP	388	sigd_enq2(NULL, as_reject, old_vcc, NULL, NULL,
b7d9371b JP	389	&old_vcc->qos, error);
1da177e4 LT	390	error = error == -EAGAIN ? -EBUSY : error;
	391	goto out;
	392	}
	393	/* wait should be short, so we ignore the non-blocking flag */
	394	set_bit(ATM_VF_WAITING, &new_vcc->flags);
aa395145	395	prepare_to_wait(sk_sleep(sk_atm(new_vcc)), &wait,
b7d9371b JP	396	TASK_UNINTERRUPTIBLE);
b7d9371b JP	397	sigd_enq(new_vcc, as_accept, old_vcc, NULL, NULL);
1da177e4 LT	398	while (test_bit(ATM_VF_WAITING, &new_vcc->flags) && sigd) {
	399	release_sock(sk);
	400	schedule();
	401	lock_sock(sk);
aa395145	402	prepare_to_wait(sk_sleep(sk_atm(new_vcc)), &wait,
b7d9371b	403	TASK_UNINTERRUPTIBLE);
1da177e4	404	}
aa395145	405	finish_wait(sk_sleep(sk_atm(new_vcc)), &wait);
1da177e4 LT	406	if (!sigd) {
	407	error = -EUNATCH;
	408	goto out;
	409	}
	410	if (!sk_atm(new_vcc)->sk_err)
	411	break;
	412	if (sk_atm(new_vcc)->sk_err != ERESTARTSYS) {
	413	error = -sk_atm(new_vcc)->sk_err;
	414	goto out;
	415	}
	416	}
	417	newsock->state = SS_CONNECTED;
	418	out:
	419	release_sock(sk);
	420	return error;
	421	}
	422
b7d9371b JP	423	static int svc_getname(struct socket sock, struct sockaddr sockaddr,
b7d9371b JP	424	int *sockaddr_len, int peer)
1da177e4 LT	425	{
	426	struct sockaddr_atmsvc *addr;
	427
	428	*sockaddr_len = sizeof(struct sockaddr_atmsvc);
	429	addr = (struct sockaddr_atmsvc *) sockaddr;
b7d9371b JP	430	memcpy(addr, peer ? &ATM_SD(sock)->remote : &ATM_SD(sock)->local,
b7d9371b JP	431	sizeof(struct sockaddr_atmsvc));
1da177e4 LT	432	return 0;
	433	}
	434
b7d9371b	435	int svc_change_qos(struct atm_vcc vcc, struct atm_qos qos)
1da177e4 LT	436	{
	437	struct sock *sk = sk_atm(vcc);
	438	DEFINE_WAIT(wait);
	439
	440	set_bit(ATM_VF_WAITING, &vcc->flags);
aa395145	441	prepare_to_wait(sk_sleep(sk), &wait, TASK_UNINTERRUPTIBLE);
b7d9371b	442	sigd_enq2(vcc, as_modify, NULL, NULL, &vcc->local, qos, 0);
1da177e4 LT	443	while (test_bit(ATM_VF_WAITING, &vcc->flags) &&
	444	!test_bit(ATM_VF_RELEASED, &vcc->flags) && sigd) {
	445	schedule();
aa395145	446	prepare_to_wait(sk_sleep(sk), &wait, TASK_UNINTERRUPTIBLE);
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);
aa395145	537	prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
1da177e4	538	sigd_enq(vcc, as_addparty, NULL, NULL,
f7d57453	539	(struct sockaddr_atmsvc *) sockaddr);
1da177e4	540	if (flags & O_NONBLOCK) {
aa395145	541	finish_wait(sk_sleep(sk), &wait);
1da177e4 LT	542	error = -EINPROGRESS;
	543	goto out;
	544	}
99824461	545	pr_debug("added wait queue\n");
1da177e4 LT	546	while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) {
1da177e4 LT	547	schedule();
aa395145	548	prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
1da177e4	549	}
aa395145	550	finish_wait(sk_sleep(sk), &wait);
1da177e4 LT	551	error = xchg(&sk->sk_err_soft, 0);
	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);
aa395145	566	prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
1da177e4 LT	567	sigd_enq2(vcc, as_dropparty, NULL, NULL, NULL, NULL, ep_ref);
	568	while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) {
	569	schedule();
aa395145	570	prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
1da177e4	571	}
aa395145	572	finish_wait(sk_sleep(sk), &wait);
1da177e4 LT	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
1da177e4 LT	583	static int svc_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1da177e4 LT	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) {
b7d9371b JP	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)))
	594	return -EFAULT;
	595	error = svc_addparty(sock, (struct sockaddr *)&sa, sizeof(sa),
	596	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)))
	602	return -EFAULT;
	603	error = svc_dropparty(sock, ep_ref);
	604	break;
	605	default:
	606	error = vcc_ioctl(sock, cmd, arg);
1da177e4 LT	607	}
	608
	609	return error;
	610	}
	611
8865c418	612	#ifdef CONFIG_COMPAT
b7d9371b JP	613	static int svc_compat_ioctl(struct socket *sock, unsigned int cmd,
b7d9371b JP	614	unsigned long arg)
8865c418 DW	615	{
	616	/* The definition of ATM_ADDPARTY uses the size of struct atm_iobuf.
	617	But actually it takes a struct sockaddr_atmsvc, which doesn't need
	618	compat handling. So all we have to do is fix up cmd... */
	619	if (cmd == COMPAT_ATM_ADDPARTY)
	620	cmd = ATM_ADDPARTY;
	621
	622	if (cmd == ATM_ADDPARTY \|\| cmd == ATM_DROPPARTY)
	623	return svc_ioctl(sock, cmd, arg);
	624	else
	625	return vcc_compat_ioctl(sock, cmd, arg);
	626	}
	627	#endif /* CONFIG_COMPAT */
	628
90ddc4f0	629	static const struct proto_ops svc_proto_ops = {
1da177e4 LT	630	.family = PF_ATMSVC,
	631	.owner = THIS_MODULE,
	632
	633	.release = svc_release,
	634	.bind = svc_bind,
	635	.connect = svc_connect,
	636	.socketpair = sock_no_socketpair,
	637	.accept = svc_accept,
	638	.getname = svc_getname,
	639	.poll = vcc_poll,
	640	.ioctl = svc_ioctl,
8865c418 DW	641	#ifdef CONFIG_COMPAT
	642	.compat_ioctl = svc_compat_ioctl,
	643	#endif
1da177e4 LT	644	.listen = svc_listen,
	645	.shutdown = svc_shutdown,
	646	.setsockopt = svc_setsockopt,
	647	.getsockopt = svc_getsockopt,
	648	.sendmsg = vcc_sendmsg,
	649	.recvmsg = vcc_recvmsg,
	650	.mmap = sock_no_mmap,
	651	.sendpage = sock_no_sendpage,
	652	};
	653
	654
3f378b68 EP	655	static int svc_create(struct net net, struct socket sock, int protocol,
3f378b68 EP	656	int kern)
1da177e4 LT	657	{
	658	int error;
	659
09ad9bc7	660	if (!net_eq(net, &init_net))
1b8d7ae4 EB	661	return -EAFNOSUPPORT;
1b8d7ae4 EB	662
1da177e4	663	sock->ops = &svc_proto_ops;
1b8d7ae4	664	error = vcc_create(net, sock, protocol, AF_ATMSVC);
b7d9371b JP	665	if (error)
b7d9371b JP	666	return error;
1da177e4 LT	667	ATM_SD(sock)->local.sas_family = AF_ATMSVC;
	668	ATM_SD(sock)->remote.sas_family = AF_ATMSVC;
	669	return 0;
	670	}
	671
ec1b4cf7	672	static const struct net_proto_family svc_family_ops = {
1da177e4 LT	673	.family = PF_ATMSVC,
	674	.create = svc_create,
	675	.owner = THIS_MODULE,
	676	};
	677
	678
	679	/*
	680	* Initialize the ATM SVC protocol family
	681	*/
	682
	683	int __init atmsvc_init(void)
	684	{
	685	return sock_register(&svc_family_ops);
	686	}
	687
	688	void atmsvc_exit(void)
	689	{
	690	sock_unregister(PF_ATMSVC);
	691	}