[linux-2.6-block.git] / net / atm / ioctl.c

/* ATM ioctl handling */

/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
/* 2003 John Levon  <levon@movementarian.org> */


#include <linux/module.h>
#include <linux/kmod.h>
#include <linux/net.h>		/* struct socket, struct proto_ops */
#include <linux/atm.h>		/* ATM stuff */
#include <linux/atmdev.h>
#include <linux/atmclip.h>	/* CLIP_*ENCAP */
#include <linux/atmarp.h>	/* manifest constants */
#include <linux/capability.h>
#include <linux/sonet.h>	/* for ioctls */
#include <linux/atmsvc.h>
#include <linux/atmmpc.h>
#include <net/atmclip.h>
#include <linux/atmlec.h>
#include <linux/mutex.h>
#include <asm/ioctls.h>
#include <net/compat.h>

#include "resources.h"
#include "signaling.h"		/* for WAITING and sigd_attach */
#include "common.h"


static DEFINE_MUTEX(ioctl_mutex);
static LIST_HEAD(ioctl_list);


void register_atm_ioctl(struct atm_ioctl *ioctl)
{
	mutex_lock(&ioctl_mutex);
	list_add_tail(&ioctl->list, &ioctl_list);
	mutex_unlock(&ioctl_mutex);
}

void deregister_atm_ioctl(struct atm_ioctl *ioctl)
{
	mutex_lock(&ioctl_mutex);
	list_del(&ioctl->list);
	mutex_unlock(&ioctl_mutex);
}

EXPORT_SYMBOL(register_atm_ioctl);
EXPORT_SYMBOL(deregister_atm_ioctl);

static int do_vcc_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg, int compat)
{
	struct sock *sk = sock->sk;
	struct atm_vcc *vcc;
	int error;
	struct list_head * pos;
	void __user *argp = (void __user *)arg;

	vcc = ATM_SD(sock);
	switch (cmd) {
		case SIOCOUTQ:
			if (sock->state != SS_CONNECTED ||
			    !test_bit(ATM_VF_READY, &vcc->flags)) {
				error =  -EINVAL;
				goto done;
			}
			error = put_user(sk->sk_sndbuf - sk_wmem_alloc_get(sk),
					 (int __user *) argp) ? -EFAULT : 0;
			goto done;
		case SIOCINQ:
			{
				struct sk_buff *skb;

				if (sock->state != SS_CONNECTED) {
					error = -EINVAL;
					goto done;
				}
				skb = skb_peek(&sk->sk_receive_queue);
				error = put_user(skb ? skb->len : 0,
						 (int __user *)argp) ? -EFAULT : 0;
				goto done;
			}
		case SIOCGSTAMP: /* borrowed from IP */
#ifdef CONFIG_COMPAT
			if (compat)
				error = compat_sock_get_timestamp(sk, argp);
			else
#endif
				error = sock_get_timestamp(sk, argp);
			goto done;
		case SIOCGSTAMPNS: /* borrowed from IP */
#ifdef CONFIG_COMPAT
			if (compat)
				error = compat_sock_get_timestampns(sk, argp);
			else
#endif
				error = sock_get_timestampns(sk, argp);
			goto done;
		case ATM_SETSC:
			if (net_ratelimit())
				printk(KERN_WARNING "ATM_SETSC is obsolete; used by %s:%d\n",
				       current->comm, task_pid_nr(current));
			error = 0;
			goto done;
		case ATMSIGD_CTRL:
			if (!capable(CAP_NET_ADMIN)) {
				error = -EPERM;
				goto done;
			}
			/*
			 * The user/kernel protocol for exchanging signalling
			 * info uses kernel pointers as opaque references,
			 * so the holder of the file descriptor can scribble
			 * on the kernel... so we should make sure that we
			 * have the same privileges that /proc/kcore needs
			 */
			if (!capable(CAP_SYS_RAWIO)) {
				error = -EPERM;
				goto done;
			}
#ifdef CONFIG_COMPAT
			/* WTF? I don't even want to _think_ about making this
			   work for 32-bit userspace. TBH I don't really want
			   to think about it at all. dwmw2. */
			if (compat) {
				if (net_ratelimit())
					printk(KERN_WARNING "32-bit task cannot be atmsigd\n");
				error = -EINVAL;
				goto done;
			}
#endif
			error = sigd_attach(vcc);
			if (!error)
				sock->state = SS_CONNECTED;
			goto done;
		case ATM_SETBACKEND:
		case ATM_NEWBACKENDIF:
			{
				atm_backend_t backend;
				error = get_user(backend, (atm_backend_t __user *) argp);
				if (error)
					goto done;
				switch (backend) {
					case ATM_BACKEND_PPP:
						request_module("pppoatm");
						break;
					case ATM_BACKEND_BR2684:
						request_module("br2684");
						break;
				}
			}
			break;
		case ATMMPC_CTRL:
		case ATMMPC_DATA:
			request_module("mpoa");
			break;
		case ATMARPD_CTRL:
			request_module("clip");
			break;
		case ATMLEC_CTRL:
			request_module("lec");
			break;
	}

	error = -ENOIOCTLCMD;

	mutex_lock(&ioctl_mutex);
	list_for_each(pos, &ioctl_list) {
		struct atm_ioctl * ic = list_entry(pos, struct atm_ioctl, list);
		if (try_module_get(ic->owner)) {
			error = ic->ioctl(sock, cmd, arg);
			module_put(ic->owner);
			if (error != -ENOIOCTLCMD)
				break;
		}
	}
	mutex_unlock(&ioctl_mutex);

	if (error != -ENOIOCTLCMD)
		goto done;

	error = atm_dev_ioctl(cmd, argp, compat);

done:
	return error;
}


int vcc_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
{
	return do_vcc_ioctl(sock, cmd, arg, 0);
}

#ifdef CONFIG_COMPAT
/*
 * FIXME:
 * The compat_ioctl handling is duplicated, using both these conversion
 * routines and the compat argument to the actual handlers. Both
 * versions are somewhat incomplete and should be merged, e.g. by
 * moving the ioctl number translation into the actual handlers and
 * killing the conversion code.
 *
 * -arnd, November 2009
 */
#define ATM_GETLINKRATE32 _IOW('a', ATMIOC_ITF+1, struct compat_atmif_sioc)
#define ATM_GETNAMES32    _IOW('a', ATMIOC_ITF+3, struct compat_atm_iobuf)
#define ATM_GETTYPE32     _IOW('a', ATMIOC_ITF+4, struct compat_atmif_sioc)
#define ATM_GETESI32	  _IOW('a', ATMIOC_ITF+5, struct compat_atmif_sioc)
#define ATM_GETADDR32	  _IOW('a', ATMIOC_ITF+6, struct compat_atmif_sioc)
#define ATM_RSTADDR32	  _IOW('a', ATMIOC_ITF+7, struct compat_atmif_sioc)
#define ATM_ADDADDR32	  _IOW('a', ATMIOC_ITF+8, struct compat_atmif_sioc)
#define ATM_DELADDR32	  _IOW('a', ATMIOC_ITF+9, struct compat_atmif_sioc)
#define ATM_GETCIRANGE32  _IOW('a', ATMIOC_ITF+10, struct compat_atmif_sioc)
#define ATM_SETCIRANGE32  _IOW('a', ATMIOC_ITF+11, struct compat_atmif_sioc)
#define ATM_SETESI32      _IOW('a', ATMIOC_ITF+12, struct compat_atmif_sioc)
#define ATM_SETESIF32     _IOW('a', ATMIOC_ITF+13, struct compat_atmif_sioc)
#define ATM_GETSTAT32     _IOW('a', ATMIOC_SARCOM+0, struct compat_atmif_sioc)
#define ATM_GETSTATZ32    _IOW('a', ATMIOC_SARCOM+1, struct compat_atmif_sioc)
#define ATM_GETLOOP32	  _IOW('a', ATMIOC_SARCOM+2, struct compat_atmif_sioc)
#define ATM_SETLOOP32	  _IOW('a', ATMIOC_SARCOM+3, struct compat_atmif_sioc)
#define ATM_QUERYLOOP32	  _IOW('a', ATMIOC_SARCOM+4, struct compat_atmif_sioc)

static struct {
	unsigned int cmd32;
	unsigned int cmd;
} atm_ioctl_map[] = {
	{ ATM_GETLINKRATE32, ATM_GETLINKRATE },
	{ ATM_GETNAMES32,    ATM_GETNAMES },
	{ ATM_GETTYPE32,     ATM_GETTYPE },
	{ ATM_GETESI32,	     ATM_GETESI },
	{ ATM_GETADDR32,     ATM_GETADDR },
	{ ATM_RSTADDR32,     ATM_RSTADDR },
	{ ATM_ADDADDR32,     ATM_ADDADDR },
	{ ATM_DELADDR32,     ATM_DELADDR },
	{ ATM_GETCIRANGE32,  ATM_GETCIRANGE },
	{ ATM_SETCIRANGE32,  ATM_SETCIRANGE },
	{ ATM_SETESI32,	     ATM_SETESI },
	{ ATM_SETESIF32,     ATM_SETESIF },
	{ ATM_GETSTAT32,     ATM_GETSTAT },
	{ ATM_GETSTATZ32,    ATM_GETSTATZ },
	{ ATM_GETLOOP32,     ATM_GETLOOP },
	{ ATM_SETLOOP32,     ATM_SETLOOP },
	{ ATM_QUERYLOOP32,   ATM_QUERYLOOP },
};

#define NR_ATM_IOCTL ARRAY_SIZE(atm_ioctl_map)

static int do_atm_iobuf(struct socket *sock, unsigned int cmd,
			unsigned long arg)
{
	struct atm_iobuf __user *iobuf;
	struct compat_atm_iobuf __user *iobuf32;
	u32 data;
	void __user *datap;
	int len, err;

	iobuf = compat_alloc_user_space(sizeof(*iobuf));
	iobuf32 = compat_ptr(arg);

	if (get_user(len, &iobuf32->length) ||
	    get_user(data, &iobuf32->buffer))
		return -EFAULT;
	datap = compat_ptr(data);
	if (put_user(len, &iobuf->length) ||
	    put_user(datap, &iobuf->buffer))
		return -EFAULT;

	err = do_vcc_ioctl(sock, cmd, (unsigned long) iobuf, 0);

	if (!err) {
		if (copy_in_user(&iobuf32->length, &iobuf->length,
				 sizeof(int)))
			err = -EFAULT;
	}

	return err;
}

static int do_atmif_sioc(struct socket *sock, unsigned int cmd,
			 unsigned long arg)
{
	struct atmif_sioc __user *sioc;
	struct compat_atmif_sioc __user *sioc32;
	u32 data;
	void __user *datap;
	int err;

	sioc = compat_alloc_user_space(sizeof(*sioc));
	sioc32 = compat_ptr(arg);

	if (copy_in_user(&sioc->number, &sioc32->number, 2 * sizeof(int))
	    || get_user(data, &sioc32->arg))
		return -EFAULT;
	datap = compat_ptr(data);
	if (put_user(datap, &sioc->arg))
		return -EFAULT;

	err = do_vcc_ioctl(sock, cmd, (unsigned long) sioc, 0);

	if (!err) {
		if (copy_in_user(&sioc32->length, &sioc->length,
				 sizeof(int)))
			err = -EFAULT;
	}
	return err;
}

static int do_atm_ioctl(struct socket *sock, unsigned int cmd32,
			unsigned long arg)
{
	int i;
	unsigned int cmd = 0;

	switch (cmd32) {
	case SONET_GETSTAT:
	case SONET_GETSTATZ:
	case SONET_GETDIAG:
	case SONET_SETDIAG:
	case SONET_CLRDIAG:
	case SONET_SETFRAMING:
	case SONET_GETFRAMING:
	case SONET_GETFRSENSE:
		return do_atmif_sioc(sock, cmd32, arg);
	}

	for (i = 0; i < NR_ATM_IOCTL; i++) {
		if (cmd32 == atm_ioctl_map[i].cmd32) {
			cmd = atm_ioctl_map[i].cmd;
			break;
		}
	}
	if (i == NR_ATM_IOCTL)
		return -EINVAL;

	switch (cmd) {
	case ATM_GETNAMES:
		return do_atm_iobuf(sock, cmd, arg);

	case ATM_GETLINKRATE:
	case ATM_GETTYPE:
	case ATM_GETESI:
	case ATM_GETADDR:
	case ATM_RSTADDR:
	case ATM_ADDADDR:
	case ATM_DELADDR:
	case ATM_GETCIRANGE:
	case ATM_SETCIRANGE:
	case ATM_SETESI:
	case ATM_SETESIF:
	case ATM_GETSTAT:
	case ATM_GETSTATZ:
	case ATM_GETLOOP:
	case ATM_SETLOOP:
	case ATM_QUERYLOOP:
		return do_atmif_sioc(sock, cmd, arg);
	}

	return -EINVAL;
}

int vcc_compat_ioctl(struct socket *sock, unsigned int cmd,
		     unsigned long arg)
{
	int ret;

	ret = do_vcc_ioctl(sock, cmd, arg, 1);
	if (ret != -ENOIOCTLCMD)
		return ret;

	return do_atm_ioctl(sock, cmd, arg);
}
#endif
Commit	Line	Data
1da177e4 LT	1	/* ATM ioctl handling */
	2
	3	/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
	4	/* 2003 John Levon <levon@movementarian.org> */
	5
	6
1da177e4 LT	7	#include <linux/module.h>
	8	#include <linux/kmod.h>
	9	#include <linux/net.h> /* struct socket, struct proto_ops */
	10	#include <linux/atm.h> /* ATM stuff */
	11	#include <linux/atmdev.h>
	12	#include <linux/atmclip.h> /* CLIP_ENCAP /
	13	#include <linux/atmarp.h> /* manifest constants */
4fc268d2	14	#include <linux/capability.h>
1da177e4 LT	15	#include <linux/sonet.h> /* for ioctls */
	16	#include <linux/atmsvc.h>
	17	#include <linux/atmmpc.h>
	18	#include <net/atmclip.h>
	19	#include <linux/atmlec.h>
4a3e2f71	20	#include <linux/mutex.h>
1da177e4	21	#include <asm/ioctls.h>
8865c418	22	#include <net/compat.h>
1da177e4 LT	23
	24	#include "resources.h"
	25	#include "signaling.h" /* for WAITING and sigd_attach */
295098e9	26	#include "common.h"
1da177e4 LT	27
1da177e4 LT	28
4a3e2f71	29	static DEFINE_MUTEX(ioctl_mutex);
1da177e4 LT	30	static LIST_HEAD(ioctl_list);
	31
	32
	33	void register_atm_ioctl(struct atm_ioctl *ioctl)
	34	{
4a3e2f71	35	mutex_lock(&ioctl_mutex);
1da177e4	36	list_add_tail(&ioctl->list, &ioctl_list);
4a3e2f71	37	mutex_unlock(&ioctl_mutex);
1da177e4 LT	38	}
	39
	40	void deregister_atm_ioctl(struct atm_ioctl *ioctl)
	41	{
4a3e2f71	42	mutex_lock(&ioctl_mutex);
1da177e4	43	list_del(&ioctl->list);
4a3e2f71	44	mutex_unlock(&ioctl_mutex);
1da177e4 LT	45	}
	46
	47	EXPORT_SYMBOL(register_atm_ioctl);
	48	EXPORT_SYMBOL(deregister_atm_ioctl);
	49
8865c418	50	static int do_vcc_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg, int compat)
1da177e4 LT	51	{
	52	struct sock *sk = sock->sk;
	53	struct atm_vcc *vcc;
	54	int error;
	55	struct list_head * pos;
	56	void __user argp = (void __user )arg;
	57
	58	vcc = ATM_SD(sock);
	59	switch (cmd) {
	60	case SIOCOUTQ:
	61	if (sock->state != SS_CONNECTED \|\|
	62	!test_bit(ATM_VF_READY, &vcc->flags)) {
	63	error = -EINVAL;
	64	goto done;
	65	}
81e2a3d5	66	error = put_user(sk->sk_sndbuf - sk_wmem_alloc_get(sk),
1da177e4 LT	67	(int __user *) argp) ? -EFAULT : 0;
	68	goto done;
	69	case SIOCINQ:
	70	{
	71	struct sk_buff *skb;
	72
	73	if (sock->state != SS_CONNECTED) {
	74	error = -EINVAL;
	75	goto done;
	76	}
	77	skb = skb_peek(&sk->sk_receive_queue);
	78	error = put_user(skb ? skb->len : 0,
f7d57453	79	(int __user *)argp) ? -EFAULT : 0;
1da177e4 LT	80	goto done;
	81	}
	82	case SIOCGSTAMP: /* borrowed from IP */
8865c418 DW	83	#ifdef CONFIG_COMPAT
	84	if (compat)
	85	error = compat_sock_get_timestamp(sk, argp);
	86	else
	87	#endif
	88	error = sock_get_timestamp(sk, argp);
1da177e4	89	goto done;
ae40eb1e	90	case SIOCGSTAMPNS: /* borrowed from IP */
8865c418 DW	91	#ifdef CONFIG_COMPAT
	92	if (compat)
	93	error = compat_sock_get_timestampns(sk, argp);
	94	else
	95	#endif
	96	error = sock_get_timestampns(sk, argp);
ae40eb1e	97	goto done;
1da177e4	98	case ATM_SETSC:
8865c418 DW	99	if (net_ratelimit())
	100	printk(KERN_WARNING "ATM_SETSC is obsolete; used by %s:%d\n",
	101	current->comm, task_pid_nr(current));
1da177e4 LT	102	error = 0;
	103	goto done;
	104	case ATMSIGD_CTRL:
	105	if (!capable(CAP_NET_ADMIN)) {
	106	error = -EPERM;
	107	goto done;
	108	}
	109	/*
	110	* The user/kernel protocol for exchanging signalling
	111	* info uses kernel pointers as opaque references,
	112	* so the holder of the file descriptor can scribble
	113	* on the kernel... so we should make sure that we
8865c418	114	* have the same privileges that /proc/kcore needs
1da177e4 LT	115	*/
	116	if (!capable(CAP_SYS_RAWIO)) {
	117	error = -EPERM;
	118	goto done;
	119	}
8865c418 DW	120	#ifdef CONFIG_COMPAT
	121	/* WTF? I don't even want to _think_ about making this
	122	work for 32-bit userspace. TBH I don't really want
	123	to think about it at all. dwmw2. */
	124	if (compat) {
	125	if (net_ratelimit())
	126	printk(KERN_WARNING "32-bit task cannot be atmsigd\n");
	127	error = -EINVAL;
	128	goto done;
	129	}
	130	#endif
1da177e4 LT	131	error = sigd_attach(vcc);
	132	if (!error)
	133	sock->state = SS_CONNECTED;
	134	goto done;
e2c4b721 RK	135	case ATM_SETBACKEND:
	136	case ATM_NEWBACKENDIF:
	137	{
	138	atm_backend_t backend;
	139	error = get_user(backend, (atm_backend_t __user *) argp);
	140	if (error)
	141	goto done;
	142	switch (backend) {
	143	case ATM_BACKEND_PPP:
	144	request_module("pppoatm");
	145	break;
	146	case ATM_BACKEND_BR2684:
	147	request_module("br2684");
	148	break;
	149	}
	150	}
	151	break;
	152	case ATMMPC_CTRL:
	153	case ATMMPC_DATA:
	154	request_module("mpoa");
	155	break;
	156	case ATMARPD_CTRL:
	157	request_module("clip");
	158	break;
	159	case ATMLEC_CTRL:
	160	request_module("lec");
1da177e4 LT	161	break;
	162	}
	163
1da177e4 LT	164	error = -ENOIOCTLCMD;
1da177e4 LT	165
4a3e2f71	166	mutex_lock(&ioctl_mutex);
1da177e4 LT	167	list_for_each(pos, &ioctl_list) {
	168	struct atm_ioctl * ic = list_entry(pos, struct atm_ioctl, list);
	169	if (try_module_get(ic->owner)) {
	170	error = ic->ioctl(sock, cmd, arg);
	171	module_put(ic->owner);
	172	if (error != -ENOIOCTLCMD)
	173	break;
	174	}
	175	}
4a3e2f71	176	mutex_unlock(&ioctl_mutex);
1da177e4 LT	177
	178	if (error != -ENOIOCTLCMD)
	179	goto done;
	180
8865c418	181	error = atm_dev_ioctl(cmd, argp, compat);
1da177e4 LT	182
	183	done:
	184	return error;
	185	}
8865c418 DW	186
	187
	188	int vcc_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
	189	{
	190	return do_vcc_ioctl(sock, cmd, arg, 0);
	191	}
	192
	193	#ifdef CONFIG_COMPAT
805003a4 AB	194	/*
	195	* FIXME:
	196	* The compat_ioctl handling is duplicated, using both these conversion
	197	* routines and the compat argument to the actual handlers. Both
	198	* versions are somewhat incomplete and should be merged, e.g. by
	199	* moving the ioctl number translation into the actual handlers and
	200	* killing the conversion code.
	201	*
	202	* -arnd, November 2009
	203	*/
	204	#define ATM_GETLINKRATE32 _IOW('a', ATMIOC_ITF+1, struct compat_atmif_sioc)
	205	#define ATM_GETNAMES32 _IOW('a', ATMIOC_ITF+3, struct compat_atm_iobuf)
	206	#define ATM_GETTYPE32 _IOW('a', ATMIOC_ITF+4, struct compat_atmif_sioc)
	207	#define ATM_GETESI32 _IOW('a', ATMIOC_ITF+5, struct compat_atmif_sioc)
	208	#define ATM_GETADDR32 _IOW('a', ATMIOC_ITF+6, struct compat_atmif_sioc)
	209	#define ATM_RSTADDR32 _IOW('a', ATMIOC_ITF+7, struct compat_atmif_sioc)
	210	#define ATM_ADDADDR32 _IOW('a', ATMIOC_ITF+8, struct compat_atmif_sioc)
	211	#define ATM_DELADDR32 _IOW('a', ATMIOC_ITF+9, struct compat_atmif_sioc)
	212	#define ATM_GETCIRANGE32 _IOW('a', ATMIOC_ITF+10, struct compat_atmif_sioc)
	213	#define ATM_SETCIRANGE32 _IOW('a', ATMIOC_ITF+11, struct compat_atmif_sioc)
	214	#define ATM_SETESI32 _IOW('a', ATMIOC_ITF+12, struct compat_atmif_sioc)
	215	#define ATM_SETESIF32 _IOW('a', ATMIOC_ITF+13, struct compat_atmif_sioc)
	216	#define ATM_GETSTAT32 _IOW('a', ATMIOC_SARCOM+0, struct compat_atmif_sioc)
	217	#define ATM_GETSTATZ32 _IOW('a', ATMIOC_SARCOM+1, struct compat_atmif_sioc)
	218	#define ATM_GETLOOP32 _IOW('a', ATMIOC_SARCOM+2, struct compat_atmif_sioc)
	219	#define ATM_SETLOOP32 _IOW('a', ATMIOC_SARCOM+3, struct compat_atmif_sioc)
	220	#define ATM_QUERYLOOP32 _IOW('a', ATMIOC_SARCOM+4, struct compat_atmif_sioc)
	221
	222	static struct {
	223	unsigned int cmd32;
	224	unsigned int cmd;
	225	} atm_ioctl_map[] = {
	226	{ ATM_GETLINKRATE32, ATM_GETLINKRATE },
	227	{ ATM_GETNAMES32, ATM_GETNAMES },
	228	{ ATM_GETTYPE32, ATM_GETTYPE },
	229	{ ATM_GETESI32, ATM_GETESI },
	230	{ ATM_GETADDR32, ATM_GETADDR },
	231	{ ATM_RSTADDR32, ATM_RSTADDR },
	232	{ ATM_ADDADDR32, ATM_ADDADDR },
	233	{ ATM_DELADDR32, ATM_DELADDR },
	234	{ ATM_GETCIRANGE32, ATM_GETCIRANGE },
	235	{ ATM_SETCIRANGE32, ATM_SETCIRANGE },
	236	{ ATM_SETESI32, ATM_SETESI },
	237	{ ATM_SETESIF32, ATM_SETESIF },
	238	{ ATM_GETSTAT32, ATM_GETSTAT },
	239	{ ATM_GETSTATZ32, ATM_GETSTATZ },
	240	{ ATM_GETLOOP32, ATM_GETLOOP },
	241	{ ATM_SETLOOP32, ATM_SETLOOP },
	242	{ ATM_QUERYLOOP32, ATM_QUERYLOOP },
	243	};
	244
	245	#define NR_ATM_IOCTL ARRAY_SIZE(atm_ioctl_map)
	246
	247	static int do_atm_iobuf(struct socket *sock, unsigned int cmd,
	248	unsigned long arg)
	249	{
	250	struct atm_iobuf __user *iobuf;
	251	struct compat_atm_iobuf __user *iobuf32;
	252	u32 data;
	253	void __user *datap;
	254	int len, err;
	255
	256	iobuf = compat_alloc_user_space(sizeof(*iobuf));
	257	iobuf32 = compat_ptr(arg);
258
259	if (get_user(len, &iobuf32->length) \|\|
260	get_user(data, &iobuf32->buffer))
261	return -EFAULT;
262	datap = compat_ptr(data);
263	if (put_user(len, &iobuf->length) \|\|
264	put_user(datap, &iobuf->buffer))
265	return -EFAULT;
266
267	err = do_vcc_ioctl(sock, cmd, (unsigned long) iobuf, 0);
268
269	if (!err) {
270	if (copy_in_user(&iobuf32->length, &iobuf->length,
271	sizeof(int)))
272	err = -EFAULT;
273	}
274
275	return err;
276	}
277
278	static int do_atmif_sioc(struct socket *sock, unsigned int cmd,
279	unsigned long arg)
280	{
281	struct atmif_sioc __user *sioc;
282	struct compat_atmif_sioc __user *sioc32;
283	u32 data;
284	void __user *datap;
285	int err;
286
287	sioc = compat_alloc_user_space(sizeof(*sioc));
288	sioc32 = compat_ptr(arg);
289
290	if (copy_in_user(&sioc->number, &sioc32->number, 2 * sizeof(int))
291	\|\| get_user(data, &sioc32->arg))
292	return -EFAULT;
293	datap = compat_ptr(data);
294	if (put_user(datap, &sioc->arg))
295	return -EFAULT;
296
297	err = do_vcc_ioctl(sock, cmd, (unsigned long) sioc, 0);
298
299	if (!err) {
300	if (copy_in_user(&sioc32->length, &sioc->length,
301	sizeof(int)))
302	err = -EFAULT;
303	}
304	return err;
305	}
306
307	static int do_atm_ioctl(struct socket *sock, unsigned int cmd32,
308	unsigned long arg)
309	{
310	int i;
311	unsigned int cmd = 0;
312
313	switch (cmd32) {
314	case SONET_GETSTAT:
315	case SONET_GETSTATZ:
316	case SONET_GETDIAG:
317	case SONET_SETDIAG:
318	case SONET_CLRDIAG:
319	case SONET_SETFRAMING:
320	case SONET_GETFRAMING:
321	case SONET_GETFRSENSE:
322	return do_atmif_sioc(sock, cmd32, arg);
323	}
324
325	for (i = 0; i < NR_ATM_IOCTL; i++) {
326	if (cmd32 == atm_ioctl_map[i].cmd32) {
327	cmd = atm_ioctl_map[i].cmd;
328	break;
329	}
330	}
331	if (i == NR_ATM_IOCTL)
332	return -EINVAL;
333
334	switch (cmd) {
335	case ATM_GETNAMES:
336	return do_atm_iobuf(sock, cmd, arg);
337
338	case ATM_GETLINKRATE:
339	case ATM_GETTYPE:
340	case ATM_GETESI:
341	case ATM_GETADDR:
342	case ATM_RSTADDR:
343	case ATM_ADDADDR:
344	case ATM_DELADDR:
345	case ATM_GETCIRANGE:
346	case ATM_SETCIRANGE:
347	case ATM_SETESI:
348	case ATM_SETESIF:
349	case ATM_GETSTAT:
350	case ATM_GETSTATZ:
351	case ATM_GETLOOP:
352	case ATM_SETLOOP:
353	case ATM_QUERYLOOP:
354	return do_atmif_sioc(sock, cmd, arg);
355	}
356
357	return -EINVAL;
358	}
359
360	int vcc_compat_ioctl(struct socket *sock, unsigned int cmd,
361	unsigned long arg)
8865c418	362	{
805003a4 AB	363	int ret;
	364
	365	ret = do_vcc_ioctl(sock, cmd, arg, 1);
	366	if (ret != -ENOIOCTLCMD)
	367	return ret;
	368
	369	return do_atm_ioctl(sock, cmd, arg);
8865c418 DW	370	}
8865c418 DW	371	#endif