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

// SPDX-License-Identifier: GPL-2.0
/* ATM ioctl handling */

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

#define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__

#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);
}
EXPORT_SYMBOL(register_atm_ioctl);

void deregister_atm_ioctl(struct atm_ioctl *ioctl)
{
	mutex_lock(&ioctl_mutex);
	list_del(&ioctl->list);
	mutex_unlock(&ioctl_mutex);
}
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 ATM_SETSC:
		net_warn_ratelimited("ATM_SETSC is obsolete; used by %s:%d\n",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) {
			net_warn_ratelimited("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
b2441318	1	// SPDX-License-Identifier: GPL-2.0
1da177e4 LT	2	/* ATM ioctl handling */
	3
	4	/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
	5	/* 2003 John Levon <levon@movementarian.org> */
	6
99824461	7	#define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
1da177e4	8
1da177e4 LT	9	#include <linux/module.h>
	10	#include <linux/kmod.h>
	11	#include <linux/net.h> /* struct socket, struct proto_ops */
	12	#include <linux/atm.h> /* ATM stuff */
	13	#include <linux/atmdev.h>
	14	#include <linux/atmclip.h> /* CLIP_ENCAP /
	15	#include <linux/atmarp.h> /* manifest constants */
4fc268d2	16	#include <linux/capability.h>
1da177e4 LT	17	#include <linux/sonet.h> /* for ioctls */
	18	#include <linux/atmsvc.h>
	19	#include <linux/atmmpc.h>
	20	#include <net/atmclip.h>
	21	#include <linux/atmlec.h>
4a3e2f71	22	#include <linux/mutex.h>
1da177e4	23	#include <asm/ioctls.h>
8865c418	24	#include <net/compat.h>
1da177e4 LT	25
	26	#include "resources.h"
	27	#include "signaling.h" /* for WAITING and sigd_attach */
295098e9	28	#include "common.h"
1da177e4 LT	29
1da177e4 LT	30
4a3e2f71	31	static DEFINE_MUTEX(ioctl_mutex);
1da177e4 LT	32	static LIST_HEAD(ioctl_list);
	33
	34
	35	void register_atm_ioctl(struct atm_ioctl *ioctl)
	36	{
4a3e2f71	37	mutex_lock(&ioctl_mutex);
1da177e4	38	list_add_tail(&ioctl->list, &ioctl_list);
4a3e2f71	39	mutex_unlock(&ioctl_mutex);
1da177e4	40	}
5ff7ef79	41	EXPORT_SYMBOL(register_atm_ioctl);
1da177e4 LT	42
	43	void deregister_atm_ioctl(struct atm_ioctl *ioctl)
	44	{
4a3e2f71	45	mutex_lock(&ioctl_mutex);
1da177e4	46	list_del(&ioctl->list);
4a3e2f71	47	mutex_unlock(&ioctl_mutex);
1da177e4	48	}
1da177e4 LT	49	EXPORT_SYMBOL(deregister_atm_ioctl);
1da177e4 LT	50
5ff7ef79 JP	51	static int do_vcc_ioctl(struct socket *sock, unsigned int cmd,
5ff7ef79 JP	52	unsigned long arg, int compat)
1da177e4 LT	53	{
	54	struct sock *sk = sock->sk;
	55	struct atm_vcc *vcc;
	56	int error;
5ff7ef79	57	struct list_head *pos;
1da177e4 LT	58	void __user argp = (void __user )arg;
	59
	60	vcc = ATM_SD(sock);
	61	switch (cmd) {
5ff7ef79 JP	62	case SIOCOUTQ:
	63	if (sock->state != SS_CONNECTED \|\|
	64	!test_bit(ATM_VF_READY, &vcc->flags)) {
	65	error = -EINVAL;
	66	goto done;
	67	}
	68	error = put_user(sk->sk_sndbuf - sk_wmem_alloc_get(sk),
	69	(int __user *)argp) ? -EFAULT : 0;
	70	goto done;
	71	case SIOCINQ:
	72	{
	73	struct sk_buff *skb;
	74
	75	if (sock->state != SS_CONNECTED) {
	76	error = -EINVAL;
1da177e4	77	goto done;
5ff7ef79 JP	78	}
	79	skb = skb_peek(&sk->sk_receive_queue);
	80	error = put_user(skb ? skb->len : 0,
	81	(int __user *)argp) ? -EFAULT : 0;
	82	goto done;
	83	}
5ff7ef79	84	case ATM_SETSC:
e87cc472 JP	85	net_warn_ratelimited("ATM_SETSC is obsolete; used by %s:%d\n",
e87cc472 JP	86	current->comm, task_pid_nr(current));
5ff7ef79 JP	87	error = 0;
	88	goto done;
	89	case ATMSIGD_CTRL:
	90	if (!capable(CAP_NET_ADMIN)) {
	91	error = -EPERM;
ae40eb1e	92	goto done;
5ff7ef79 JP	93	}
	94	/*
	95	* The user/kernel protocol for exchanging signalling
	96	* info uses kernel pointers as opaque references,
	97	* so the holder of the file descriptor can scribble
	98	* on the kernel... so we should make sure that we
	99	* have the same privileges that /proc/kcore needs
	100	*/
	101	if (!capable(CAP_SYS_RAWIO)) {
	102	error = -EPERM;
1da177e4	103	goto done;
5ff7ef79	104	}
8865c418	105	#ifdef CONFIG_COMPAT
5ff7ef79 JP	106	/* WTF? I don't even want to _think_ about making this
	107	work for 32-bit userspace. TBH I don't really want
	108	to think about it at all. dwmw2. */
	109	if (compat) {
e87cc472	110	net_warn_ratelimited("32-bit task cannot be atmsigd\n");
5ff7ef79 JP	111	error = -EINVAL;
	112	goto done;
	113	}
8865c418	114	#endif
5ff7ef79 JP	115	error = sigd_attach(vcc);
	116	if (!error)
	117	sock->state = SS_CONNECTED;
	118	goto done;
	119	case ATM_SETBACKEND:
	120	case ATM_NEWBACKENDIF:
	121	{
	122	atm_backend_t backend;
	123	error = get_user(backend, (atm_backend_t __user *)argp);
	124	if (error)
1da177e4	125	goto done;
5ff7ef79 JP	126	switch (backend) {
	127	case ATM_BACKEND_PPP:
	128	request_module("pppoatm");
e2c4b721	129	break;
5ff7ef79 JP	130	case ATM_BACKEND_BR2684:
5ff7ef79 JP	131	request_module("br2684");
1da177e4	132	break;
5ff7ef79 JP	133	}
	134	break;
	135	}
	136	case ATMMPC_CTRL:
	137	case ATMMPC_DATA:
	138	request_module("mpoa");
	139	break;
	140	case ATMARPD_CTRL:
	141	request_module("clip");
	142	break;
	143	case ATMLEC_CTRL:
	144	request_module("lec");
	145	break;
1da177e4 LT	146	}
1da177e4 LT	147
1da177e4 LT	148	error = -ENOIOCTLCMD;
1da177e4 LT	149
4a3e2f71	150	mutex_lock(&ioctl_mutex);
1da177e4	151	list_for_each(pos, &ioctl_list) {
5ff7ef79	152	struct atm_ioctl *ic = list_entry(pos, struct atm_ioctl, list);
1da177e4 LT	153	if (try_module_get(ic->owner)) {
	154	error = ic->ioctl(sock, cmd, arg);
	155	module_put(ic->owner);
	156	if (error != -ENOIOCTLCMD)
	157	break;
	158	}
	159	}
4a3e2f71	160	mutex_unlock(&ioctl_mutex);
1da177e4 LT	161
	162	if (error != -ENOIOCTLCMD)
	163	goto done;
	164
8865c418	165	error = atm_dev_ioctl(cmd, argp, compat);
1da177e4 LT	166
	167	done:
	168	return error;
	169	}
8865c418	170
8865c418 DW	171	int vcc_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
	172	{
	173	return do_vcc_ioctl(sock, cmd, arg, 0);
	174	}
	175
	176	#ifdef CONFIG_COMPAT
805003a4 AB	177	/*
	178	* FIXME:
	179	* The compat_ioctl handling is duplicated, using both these conversion
	180	* routines and the compat argument to the actual handlers. Both
	181	* versions are somewhat incomplete and should be merged, e.g. by
	182	* moving the ioctl number translation into the actual handlers and
	183	* killing the conversion code.
	184	*
	185	* -arnd, November 2009
	186	*/
	187	#define ATM_GETLINKRATE32 _IOW('a', ATMIOC_ITF+1, struct compat_atmif_sioc)
	188	#define ATM_GETNAMES32 _IOW('a', ATMIOC_ITF+3, struct compat_atm_iobuf)
	189	#define ATM_GETTYPE32 _IOW('a', ATMIOC_ITF+4, struct compat_atmif_sioc)
	190	#define ATM_GETESI32 _IOW('a', ATMIOC_ITF+5, struct compat_atmif_sioc)
	191	#define ATM_GETADDR32 _IOW('a', ATMIOC_ITF+6, struct compat_atmif_sioc)
	192	#define ATM_RSTADDR32 _IOW('a', ATMIOC_ITF+7, struct compat_atmif_sioc)
	193	#define ATM_ADDADDR32 _IOW('a', ATMIOC_ITF+8, struct compat_atmif_sioc)
	194	#define ATM_DELADDR32 _IOW('a', ATMIOC_ITF+9, struct compat_atmif_sioc)
	195	#define ATM_GETCIRANGE32 _IOW('a', ATMIOC_ITF+10, struct compat_atmif_sioc)
	196	#define ATM_SETCIRANGE32 _IOW('a', ATMIOC_ITF+11, struct compat_atmif_sioc)
	197	#define ATM_SETESI32 _IOW('a', ATMIOC_ITF+12, struct compat_atmif_sioc)
	198	#define ATM_SETESIF32 _IOW('a', ATMIOC_ITF+13, struct compat_atmif_sioc)
	199	#define ATM_GETSTAT32 _IOW('a', ATMIOC_SARCOM+0, struct compat_atmif_sioc)
	200	#define ATM_GETSTATZ32 _IOW('a', ATMIOC_SARCOM+1, struct compat_atmif_sioc)
	201	#define ATM_GETLOOP32 _IOW('a', ATMIOC_SARCOM+2, struct compat_atmif_sioc)
	202	#define ATM_SETLOOP32 _IOW('a', ATMIOC_SARCOM+3, struct compat_atmif_sioc)
	203	#define ATM_QUERYLOOP32 _IOW('a', ATMIOC_SARCOM+4, struct compat_atmif_sioc)
	204
	205	static struct {
	206	unsigned int cmd32;
	207	unsigned int cmd;
	208	} atm_ioctl_map[] = {
	209	{ ATM_GETLINKRATE32, ATM_GETLINKRATE },
	210	{ ATM_GETNAMES32, ATM_GETNAMES },
	211	{ ATM_GETTYPE32, ATM_GETTYPE },
	212	{ ATM_GETESI32, ATM_GETESI },
	213	{ ATM_GETADDR32, ATM_GETADDR },
	214	{ ATM_RSTADDR32, ATM_RSTADDR },
	215	{ ATM_ADDADDR32, ATM_ADDADDR },
	216	{ ATM_DELADDR32, ATM_DELADDR },
	217	{ ATM_GETCIRANGE32, ATM_GETCIRANGE },
	218	{ ATM_SETCIRANGE32, ATM_SETCIRANGE },
	219	{ ATM_SETESI32, ATM_SETESI },
	220	{ ATM_SETESIF32, ATM_SETESIF },
	221	{ ATM_GETSTAT32, ATM_GETSTAT },
	222	{ ATM_GETSTATZ32, ATM_GETSTATZ },
	223	{ ATM_GETLOOP32, ATM_GETLOOP },
	224	{ ATM_SETLOOP32, ATM_SETLOOP },
	225	{ ATM_QUERYLOOP32, ATM_QUERYLOOP },
	226	};
	227
	228	#define NR_ATM_IOCTL ARRAY_SIZE(atm_ioctl_map)
	229
	230	static int do_atm_iobuf(struct socket *sock, unsigned int cmd,
	231	unsigned long arg)
	232	{
	233	struct atm_iobuf __user *iobuf;
	234	struct compat_atm_iobuf __user *iobuf32;
	235	u32 data;
	236	void __user *datap;
	237	int len, err;
	238
	239	iobuf = compat_alloc_user_space(sizeof(*iobuf));
	240	iobuf32 = compat_ptr(arg);
241
242	if (get_user(len, &iobuf32->length) \|\|
243	get_user(data, &iobuf32->buffer))
244	return -EFAULT;
245	datap = compat_ptr(data);
246	if (put_user(len, &iobuf->length) \|\|
247	put_user(datap, &iobuf->buffer))
248	return -EFAULT;
249
250	err = do_vcc_ioctl(sock, cmd, (unsigned long) iobuf, 0);
251
252	if (!err) {
253	if (copy_in_user(&iobuf32->length, &iobuf->length,
254	sizeof(int)))
255	err = -EFAULT;
256	}
257
258	return err;
259	}
260
261	static int do_atmif_sioc(struct socket *sock, unsigned int cmd,
262	unsigned long arg)
263	{
264	struct atmif_sioc __user *sioc;
265	struct compat_atmif_sioc __user *sioc32;
266	u32 data;
267	void __user *datap;
268	int err;
269
270	sioc = compat_alloc_user_space(sizeof(*sioc));
271	sioc32 = compat_ptr(arg);
272
5ff7ef79 JP	273	if (copy_in_user(&sioc->number, &sioc32->number, 2 * sizeof(int)) \|\|
5ff7ef79 JP	274	get_user(data, &sioc32->arg))
805003a4 AB	275	return -EFAULT;
	276	datap = compat_ptr(data);
	277	if (put_user(datap, &sioc->arg))
	278	return -EFAULT;
	279
	280	err = do_vcc_ioctl(sock, cmd, (unsigned long) sioc, 0);
	281
	282	if (!err) {
	283	if (copy_in_user(&sioc32->length, &sioc->length,
	284	sizeof(int)))
	285	err = -EFAULT;
	286	}
	287	return err;
	288	}
	289
	290	static int do_atm_ioctl(struct socket *sock, unsigned int cmd32,
	291	unsigned long arg)
	292	{
	293	int i;
	294	unsigned int cmd = 0;
	295
	296	switch (cmd32) {
	297	case SONET_GETSTAT:
	298	case SONET_GETSTATZ:
	299	case SONET_GETDIAG:
	300	case SONET_SETDIAG:
	301	case SONET_CLRDIAG:
	302	case SONET_SETFRAMING:
	303	case SONET_GETFRAMING:
	304	case SONET_GETFRSENSE:
	305	return do_atmif_sioc(sock, cmd32, arg);
	306	}
	307
	308	for (i = 0; i < NR_ATM_IOCTL; i++) {
	309	if (cmd32 == atm_ioctl_map[i].cmd32) {
	310	cmd = atm_ioctl_map[i].cmd;
	311	break;
	312	}
	313	}
	314	if (i == NR_ATM_IOCTL)
	315	return -EINVAL;
	316
	317	switch (cmd) {
	318	case ATM_GETNAMES:
	319	return do_atm_iobuf(sock, cmd, arg);
	320
	321	case ATM_GETLINKRATE:
	322	case ATM_GETTYPE:
	323	case ATM_GETESI:
	324	case ATM_GETADDR:
	325	case ATM_RSTADDR:
	326	case ATM_ADDADDR:
	327	case ATM_DELADDR:
	328	case ATM_GETCIRANGE:
	329	case ATM_SETCIRANGE:
	330	case ATM_SETESI:
	331	case ATM_SETESIF:
	332	case ATM_GETSTAT:
	333	case ATM_GETSTATZ:
	334	case ATM_GETLOOP:
	335	case ATM_SETLOOP:
	336	case ATM_QUERYLOOP:
	337	return do_atmif_sioc(sock, cmd, arg);
	338	}
339
340	return -EINVAL;
341	}
342
343	int vcc_compat_ioctl(struct socket *sock, unsigned int cmd,
344	unsigned long arg)
8865c418	345	{
805003a4 AB	346	int ret;
	347
	348	ret = do_vcc_ioctl(sock, cmd, arg, 1);
	349	if (ret != -ENOIOCTLCMD)
	350	return ret;
	351
	352	return do_atm_ioctl(sock, cmd, arg);
8865c418 DW	353	}
8865c418 DW	354	#endif