[GitHub/mt8127/android_kernel_alcatel_ttab.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;
		}
	}
/*
 * 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>
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	}
	266	/*
	267	* Not supported yet
	268	*
	269	* #ifndef CONFIG_SINGLE_SIGITF
	270	*/
	271	vcc->qos.txtp.max_pcr = SELECT_TOP_PCR(vcc->qos.txtp);
	272	vcc->qos.txtp.pcr = 0;
	273	vcc->qos.txtp.min_pcr = 0;
	274	/*
	275	* #endif
	276	*/
b7d9371b JP	277	error = vcc_connect(sock, vcc->itf, vcc->vpi, vcc->vci);
b7d9371b JP	278	if (!error)
1da177e4 LT	279	sock->state = SS_CONNECTED;
1da177e4 LT	280	else
b7d9371b	281	(void)svc_disconnect(vcc);
1da177e4 LT	282	out:
	283	release_sock(sk);
	284	return error;
	285	}
	286
b7d9371b	287	static int svc_listen(struct socket *sock, int backlog)
1da177e4 LT	288	{
	289	DEFINE_WAIT(wait);
	290	struct sock *sk = sock->sk;
	291	struct atm_vcc *vcc = ATM_SD(sock);
	292	int error;
	293
99824461	294	pr_debug("%p\n", vcc);
1da177e4 LT	295	lock_sock(sk);
1da177e4 LT	296	/* let server handle listen on unbound sockets */
b7d9371b	297	if (test_bit(ATM_VF_SESSION, &vcc->flags)) {
1da177e4 LT	298	error = -EINVAL;
	299	goto out;
	300	}
17b24b3c CW	301	if (test_bit(ATM_VF_LISTEN, &vcc->flags)) {
	302	error = -EADDRINUSE;
	303	goto out;
b7d9371b	304	}
1da177e4	305	set_bit(ATM_VF_WAITING, &vcc->flags);
aa395145	306	prepare_to_wait(sk_sleep(sk), &wait, TASK_UNINTERRUPTIBLE);
b7d9371b	307	sigd_enq(vcc, as_listen, NULL, NULL, &vcc->local);
1da177e4 LT	308	while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) {
1da177e4 LT	309	schedule();
aa395145	310	prepare_to_wait(sk_sleep(sk), &wait, TASK_UNINTERRUPTIBLE);
1da177e4	311	}
aa395145	312	finish_wait(sk_sleep(sk), &wait);
1da177e4 LT	313	if (!sigd) {
	314	error = -EUNATCH;
	315	goto out;
	316	}
b7d9371b	317	set_bit(ATM_VF_LISTEN, &vcc->flags);
17b24b3c	318	vcc_insert_socket(sk);
1da177e4 LT	319	sk->sk_max_ack_backlog = backlog > 0 ? backlog : ATM_BACKLOG_DEFAULT;
	320	error = -sk->sk_err;
	321	out:
	322	release_sock(sk);
	323	return error;
	324	}
	325
b7d9371b	326	static int svc_accept(struct socket sock, struct socket newsock, int flags)
1da177e4 LT	327	{
	328	struct sock *sk = sock->sk;
	329	struct sk_buff *skb;
	330	struct atmsvc_msg *msg;
	331	struct atm_vcc *old_vcc = ATM_SD(sock);
	332	struct atm_vcc *new_vcc;
	333	int error;
	334
	335	lock_sock(sk);
	336
3f378b68	337	error = svc_create(sock_net(sk), newsock, 0, 0);
1da177e4 LT	338	if (error)
	339	goto out;
	340
	341	new_vcc = ATM_SD(newsock);
	342
99824461	343	pr_debug("%p -> %p\n", old_vcc, new_vcc);
1da177e4 LT	344	while (1) {
	345	DEFINE_WAIT(wait);
	346
aa395145	347	prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
1da177e4 LT	348	while (!(skb = skb_dequeue(&sk->sk_receive_queue)) &&
1da177e4 LT	349	sigd) {
b7d9371b JP	350	if (test_bit(ATM_VF_RELEASED, &old_vcc->flags))
	351	break;
	352	if (test_bit(ATM_VF_CLOSE, &old_vcc->flags)) {
1da177e4 LT	353	error = -sk->sk_err;
	354	break;
	355	}
	356	if (flags & O_NONBLOCK) {
	357	error = -EAGAIN;
	358	break;
	359	}
	360	release_sock(sk);
	361	schedule();
	362	lock_sock(sk);
	363	if (signal_pending(current)) {
	364	error = -ERESTARTSYS;
	365	break;
	366	}
aa395145	367	prepare_to_wait(sk_sleep(sk), &wait,
b7d9371b	368	TASK_INTERRUPTIBLE);
1da177e4	369	}
aa395145	370	finish_wait(sk_sleep(sk), &wait);
1da177e4 LT	371	if (error)
	372	goto out;
	373	if (!skb) {
	374	error = -EUNATCH;
	375	goto out;
	376	}
b7d9371b	377	msg = (struct atmsvc_msg *)skb->data;
1da177e4	378	new_vcc->qos = msg->qos;
b7d9371b	379	set_bit(ATM_VF_HASQOS, &new_vcc->flags);
1da177e4 LT	380	new_vcc->remote = msg->svc;
	381	new_vcc->local = msg->local;
	382	new_vcc->sap = msg->sap;
	383	error = vcc_connect(newsock, msg->pvc.sap_addr.itf,
b7d9371b JP	384	msg->pvc.sap_addr.vpi,
b7d9371b JP	385	msg->pvc.sap_addr.vci);
1da177e4 LT	386	dev_kfree_skb(skb);
	387	sk->sk_ack_backlog--;
	388	if (error) {
b7d9371b JP	389	sigd_enq2(NULL, as_reject, old_vcc, NULL, NULL,
b7d9371b JP	390	&old_vcc->qos, error);
1da177e4 LT	391	error = error == -EAGAIN ? -EBUSY : error;
	392	goto out;
	393	}
	394	/* wait should be short, so we ignore the non-blocking flag */
	395	set_bit(ATM_VF_WAITING, &new_vcc->flags);
aa395145	396	prepare_to_wait(sk_sleep(sk_atm(new_vcc)), &wait,
b7d9371b JP	397	TASK_UNINTERRUPTIBLE);
b7d9371b JP	398	sigd_enq(new_vcc, as_accept, old_vcc, NULL, NULL);
1da177e4 LT	399	while (test_bit(ATM_VF_WAITING, &new_vcc->flags) && sigd) {
	400	release_sock(sk);
	401	schedule();
	402	lock_sock(sk);
aa395145	403	prepare_to_wait(sk_sleep(sk_atm(new_vcc)), &wait,
b7d9371b	404	TASK_UNINTERRUPTIBLE);
1da177e4	405	}
aa395145	406	finish_wait(sk_sleep(sk_atm(new_vcc)), &wait);
1da177e4 LT	407	if (!sigd) {
	408	error = -EUNATCH;
	409	goto out;
	410	}
	411	if (!sk_atm(new_vcc)->sk_err)
	412	break;
	413	if (sk_atm(new_vcc)->sk_err != ERESTARTSYS) {
	414	error = -sk_atm(new_vcc)->sk_err;
	415	goto out;
	416	}
	417	}
	418	newsock->state = SS_CONNECTED;
	419	out:
	420	release_sock(sk);
	421	return error;
	422	}
	423
b7d9371b JP	424	static int svc_getname(struct socket sock, struct sockaddr sockaddr,
b7d9371b JP	425	int *sockaddr_len, int peer)
1da177e4 LT	426	{
	427	struct sockaddr_atmsvc *addr;
	428
	429	*sockaddr_len = sizeof(struct sockaddr_atmsvc);
	430	addr = (struct sockaddr_atmsvc *) sockaddr;
b7d9371b JP	431	memcpy(addr, peer ? &ATM_SD(sock)->remote : &ATM_SD(sock)->local,
b7d9371b JP	432	sizeof(struct sockaddr_atmsvc));
1da177e4 LT	433	return 0;
	434	}
	435
b7d9371b	436	int svc_change_qos(struct atm_vcc vcc, struct atm_qos qos)
1da177e4 LT	437	{
	438	struct sock *sk = sk_atm(vcc);
	439	DEFINE_WAIT(wait);
	440
	441	set_bit(ATM_VF_WAITING, &vcc->flags);
aa395145	442	prepare_to_wait(sk_sleep(sk), &wait, TASK_UNINTERRUPTIBLE);
b7d9371b	443	sigd_enq2(vcc, as_modify, NULL, NULL, &vcc->local, qos, 0);
1da177e4 LT	444	while (test_bit(ATM_VF_WAITING, &vcc->flags) &&
	445	!test_bit(ATM_VF_RELEASED, &vcc->flags) && sigd) {
	446	schedule();
aa395145	447	prepare_to_wait(sk_sleep(sk), &wait, TASK_UNINTERRUPTIBLE);
1da177e4	448	}
aa395145	449	finish_wait(sk_sleep(sk), &wait);
b7d9371b JP	450	if (!sigd)
b7d9371b JP	451	return -EUNATCH;
1da177e4 LT	452	return -sk->sk_err;
	453	}
	454
1da177e4	455	static int svc_setsockopt(struct socket *sock, int level, int optname,
b7058842	456	char __user *optval, unsigned int optlen)
1da177e4 LT	457	{
	458	struct sock *sk = sock->sk;
	459	struct atm_vcc *vcc = ATM_SD(sock);
	460	int value, error = 0;
	461
	462	lock_sock(sk);
	463	switch (optname) {
b7d9371b JP	464	case SO_ATMSAP:
	465	if (level != SOL_ATM \|\| optlen != sizeof(struct atm_sap)) {
	466	error = -EINVAL;
	467	goto out;
	468	}
	469	if (copy_from_user(&vcc->sap, optval, optlen)) {
	470	error = -EFAULT;
	471	goto out;
	472	}
	473	set_bit(ATM_VF_HASSAP, &vcc->flags);
	474	break;
	475	case SO_MULTIPOINT:
	476	if (level != SOL_ATM \|\| optlen != sizeof(int)) {
	477	error = -EINVAL;
	478	goto out;
	479	}
	480	if (get_user(value, (int __user *)optval)) {
	481	error = -EFAULT;
	482	goto out;
	483	}
	484	if (value == 1)
	485	set_bit(ATM_VF_SESSION, &vcc->flags);
	486	else if (value == 0)
	487	clear_bit(ATM_VF_SESSION, &vcc->flags);
	488	else
	489	error = -EINVAL;
	490	break;
	491	default:
	492	error = vcc_setsockopt(sock, level, optname, optval, optlen);
1da177e4 LT	493	}
	494
	495	out:
	496	release_sock(sk);
	497	return error;
	498	}
	499
b7d9371b JP	500	static int svc_getsockopt(struct socket *sock, int level, int optname,
b7d9371b JP	501	char __user optval, int __user optlen)
1da177e4 LT	502	{
	503	struct sock *sk = sock->sk;
	504	int error = 0, len;
	505
	506	lock_sock(sk);
	507	if (!__SO_LEVEL_MATCH(optname, level) \|\| optname != SO_ATMSAP) {
	508	error = vcc_getsockopt(sock, level, optname, optval, optlen);
	509	goto out;
	510	}
	511	if (get_user(len, optlen)) {
	512	error = -EFAULT;
	513	goto out;
	514	}
	515	if (len != sizeof(struct atm_sap)) {
	516	error = -EINVAL;
	517	goto out;
	518	}
	519	if (copy_to_user(optval, &ATM_SD(sock)->sap, sizeof(struct atm_sap))) {
	520	error = -EFAULT;
	521	goto out;
	522	}
	523	out:
	524	release_sock(sk);
	525	return error;
	526	}
	527
1da177e4 LT	528	static int svc_addparty(struct socket sock, struct sockaddr sockaddr,
	529	int sockaddr_len, int flags)
	530	{
	531	DEFINE_WAIT(wait);
	532	struct sock *sk = sock->sk;
	533	struct atm_vcc *vcc = ATM_SD(sock);
	534	int error;
	535
	536	lock_sock(sk);
	537	set_bit(ATM_VF_WAITING, &vcc->flags);
aa395145	538	prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
1da177e4	539	sigd_enq(vcc, as_addparty, NULL, NULL,
f7d57453	540	(struct sockaddr_atmsvc *) sockaddr);
1da177e4	541	if (flags & O_NONBLOCK) {
aa395145	542	finish_wait(sk_sleep(sk), &wait);
1da177e4 LT	543	error = -EINPROGRESS;
	544	goto out;
	545	}
99824461	546	pr_debug("added wait queue\n");
1da177e4 LT	547	while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) {
1da177e4 LT	548	schedule();
aa395145	549	prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
1da177e4	550	}
aa395145	551	finish_wait(sk_sleep(sk), &wait);
1da177e4 LT	552	error = xchg(&sk->sk_err_soft, 0);
	553	out:
	554	release_sock(sk);
	555	return error;
	556	}
	557
1da177e4 LT	558	static int svc_dropparty(struct socket *sock, int ep_ref)
	559	{
	560	DEFINE_WAIT(wait);
	561	struct sock *sk = sock->sk;
	562	struct atm_vcc *vcc = ATM_SD(sock);
	563	int error;
	564
	565	lock_sock(sk);
	566	set_bit(ATM_VF_WAITING, &vcc->flags);
aa395145	567	prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
1da177e4 LT	568	sigd_enq2(vcc, as_dropparty, NULL, NULL, NULL, NULL, ep_ref);
	569	while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) {
	570	schedule();
aa395145	571	prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
1da177e4	572	}
aa395145	573	finish_wait(sk_sleep(sk), &wait);
1da177e4 LT	574	if (!sigd) {
	575	error = -EUNATCH;
	576	goto out;
	577	}
	578	error = xchg(&sk->sk_err_soft, 0);
	579	out:
	580	release_sock(sk);
	581	return error;
	582	}
	583
1da177e4 LT	584	static int svc_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1da177e4 LT	585	{
f7d57453 YH	586	int error, ep_ref;
f7d57453 YH	587	struct sockaddr_atmsvc sa;
1da177e4	588	struct atm_vcc *vcc = ATM_SD(sock);
f7d57453	589
1da177e4	590	switch (cmd) {
b7d9371b JP	591	case ATM_ADDPARTY:
	592	if (!test_bit(ATM_VF_SESSION, &vcc->flags))
	593	return -EINVAL;
	594	if (copy_from_user(&sa, (void __user *) arg, sizeof(sa)))
	595	return -EFAULT;
	596	error = svc_addparty(sock, (struct sockaddr *)&sa, sizeof(sa),
	597	0);
	598	break;
	599	case ATM_DROPPARTY:
	600	if (!test_bit(ATM_VF_SESSION, &vcc->flags))
	601	return -EINVAL;
	602	if (copy_from_user(&ep_ref, (void __user *) arg, sizeof(int)))
	603	return -EFAULT;
	604	error = svc_dropparty(sock, ep_ref);
	605	break;
	606	default:
	607	error = vcc_ioctl(sock, cmd, arg);
1da177e4 LT	608	}
	609
	610	return error;
	611	}
	612
8865c418	613	#ifdef CONFIG_COMPAT
b7d9371b JP	614	static int svc_compat_ioctl(struct socket *sock, unsigned int cmd,
b7d9371b JP	615	unsigned long arg)
8865c418 DW	616	{
	617	/* The definition of ATM_ADDPARTY uses the size of struct atm_iobuf.
	618	But actually it takes a struct sockaddr_atmsvc, which doesn't need
	619	compat handling. So all we have to do is fix up cmd... */
	620	if (cmd == COMPAT_ATM_ADDPARTY)
	621	cmd = ATM_ADDPARTY;
	622
	623	if (cmd == ATM_ADDPARTY \|\| cmd == ATM_DROPPARTY)
	624	return svc_ioctl(sock, cmd, arg);
	625	else
	626	return vcc_compat_ioctl(sock, cmd, arg);
	627	}
	628	#endif /* CONFIG_COMPAT */
	629
90ddc4f0	630	static const struct proto_ops svc_proto_ops = {
1da177e4 LT	631	.family = PF_ATMSVC,
	632	.owner = THIS_MODULE,
	633
	634	.release = svc_release,
	635	.bind = svc_bind,
	636	.connect = svc_connect,
	637	.socketpair = sock_no_socketpair,
	638	.accept = svc_accept,
	639	.getname = svc_getname,
	640	.poll = vcc_poll,
	641	.ioctl = svc_ioctl,
8865c418 DW	642	#ifdef CONFIG_COMPAT
	643	.compat_ioctl = svc_compat_ioctl,
	644	#endif
1da177e4 LT	645	.listen = svc_listen,
	646	.shutdown = svc_shutdown,
	647	.setsockopt = svc_setsockopt,
	648	.getsockopt = svc_getsockopt,
	649	.sendmsg = vcc_sendmsg,
	650	.recvmsg = vcc_recvmsg,
	651	.mmap = sock_no_mmap,
	652	.sendpage = sock_no_sendpage,
	653	};
	654
	655
3f378b68 EP	656	static int svc_create(struct net net, struct socket sock, int protocol,
3f378b68 EP	657	int kern)
1da177e4 LT	658	{
	659	int error;
	660
09ad9bc7	661	if (!net_eq(net, &init_net))
1b8d7ae4 EB	662	return -EAFNOSUPPORT;
1b8d7ae4 EB	663
1da177e4	664	sock->ops = &svc_proto_ops;
1b8d7ae4	665	error = vcc_create(net, sock, protocol, AF_ATMSVC);
b7d9371b JP	666	if (error)
b7d9371b JP	667	return error;
1da177e4 LT	668	ATM_SD(sock)->local.sas_family = AF_ATMSVC;
	669	ATM_SD(sock)->remote.sas_family = AF_ATMSVC;
	670	return 0;
	671	}
	672
ec1b4cf7	673	static const struct net_proto_family svc_family_ops = {
1da177e4 LT	674	.family = PF_ATMSVC,
	675	.create = svc_create,
	676	.owner = THIS_MODULE,
	677	};
	678
	679
	680	/*
	681	* Initialize the ATM SVC protocol family
	682	*/
	683
	684	int __init atmsvc_init(void)
	685	{
	686	return sock_register(&svc_family_ops);
	687	}
	688
	689	void atmsvc_exit(void)
	690	{
	691	sock_unregister(PF_ATMSVC);
	692	}