[deliverable/linux.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 <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)) {
		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;
		}
	}

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