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v5.4
  1// SPDX-License-Identifier: GPL-2.0-or-later
  2/*
  3 * compat ioctls for control API
  4 *
  5 *   Copyright (c) by Takashi Iwai <tiwai@suse.de>
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  6 */
  7
  8/* this file included from control.c */
  9
 10#include <linux/compat.h>
 11#include <linux/slab.h>
 12
 13struct snd_ctl_elem_list32 {
 14	u32 offset;
 15	u32 space;
 16	u32 used;
 17	u32 count;
 18	u32 pids;
 19	unsigned char reserved[50];
 20} /* don't set packed attribute here */;
 21
 22static int snd_ctl_elem_list_compat(struct snd_card *card,
 23				    struct snd_ctl_elem_list32 __user *data32)
 24{
 25	struct snd_ctl_elem_list __user *data;
 26	compat_caddr_t ptr;
 27	int err;
 28
 29	data = compat_alloc_user_space(sizeof(*data));
 30
 31	/* offset, space, used, count */
 32	if (copy_in_user(data, data32, 4 * sizeof(u32)))
 33		return -EFAULT;
 34	/* pids */
 35	if (get_user(ptr, &data32->pids) ||
 36	    put_user(compat_ptr(ptr), &data->pids))
 37		return -EFAULT;
 38	err = snd_ctl_elem_list(card, data);
 39	if (err < 0)
 40		return err;
 41	/* copy the result */
 42	if (copy_in_user(data32, data, 4 * sizeof(u32)))
 43		return -EFAULT;
 44	return 0;
 45}
 46
 47/*
 48 * control element info
 49 * it uses union, so the things are not easy..
 50 */
 51
 52struct snd_ctl_elem_info32 {
 53	struct snd_ctl_elem_id id; // the size of struct is same
 54	s32 type;
 55	u32 access;
 56	u32 count;
 57	s32 owner;
 58	union {
 59		struct {
 60			s32 min;
 61			s32 max;
 62			s32 step;
 63		} integer;
 64		struct {
 65			u64 min;
 66			u64 max;
 67			u64 step;
 68		} integer64;
 69		struct {
 70			u32 items;
 71			u32 item;
 72			char name[64];
 73			u64 names_ptr;
 74			u32 names_length;
 75		} enumerated;
 76		unsigned char reserved[128];
 77	} value;
 78	unsigned char reserved[64];
 79} __attribute__((packed));
 80
 81static int snd_ctl_elem_info_compat(struct snd_ctl_file *ctl,
 82				    struct snd_ctl_elem_info32 __user *data32)
 83{
 84	struct snd_ctl_elem_info *data;
 85	int err;
 86
 87	data = kzalloc(sizeof(*data), GFP_KERNEL);
 88	if (! data)
 89		return -ENOMEM;
 90
 91	err = -EFAULT;
 92	/* copy id */
 93	if (copy_from_user(&data->id, &data32->id, sizeof(data->id)))
 94		goto error;
 95	/* we need to copy the item index.
 96	 * hope this doesn't break anything..
 97	 */
 98	if (get_user(data->value.enumerated.item, &data32->value.enumerated.item))
 99		goto error;
100
 
101	err = snd_power_wait(ctl->card, SNDRV_CTL_POWER_D0);
102	if (err < 0)
103		goto error;
104	err = snd_ctl_elem_info(ctl, data);
 
105	if (err < 0)
106		goto error;
107	/* restore info to 32bit */
108	err = -EFAULT;
109	/* id, type, access, count */
110	if (copy_to_user(&data32->id, &data->id, sizeof(data->id)) ||
111	    copy_to_user(&data32->type, &data->type, 3 * sizeof(u32)))
112		goto error;
113	if (put_user(data->owner, &data32->owner))
114		goto error;
115	switch (data->type) {
116	case SNDRV_CTL_ELEM_TYPE_BOOLEAN:
117	case SNDRV_CTL_ELEM_TYPE_INTEGER:
118		if (put_user(data->value.integer.min, &data32->value.integer.min) ||
119		    put_user(data->value.integer.max, &data32->value.integer.max) ||
120		    put_user(data->value.integer.step, &data32->value.integer.step))
121			goto error;
122		break;
123	case SNDRV_CTL_ELEM_TYPE_INTEGER64:
124		if (copy_to_user(&data32->value.integer64,
125				 &data->value.integer64,
126				 sizeof(data->value.integer64)))
127			goto error;
128		break;
129	case SNDRV_CTL_ELEM_TYPE_ENUMERATED:
130		if (copy_to_user(&data32->value.enumerated,
131				 &data->value.enumerated,
132				 sizeof(data->value.enumerated)))
133			goto error;
134		break;
135	default:
136		break;
137	}
138	err = 0;
139 error:
140	kfree(data);
141	return err;
142}
143
144/* read / write */
145struct snd_ctl_elem_value32 {
146	struct snd_ctl_elem_id id;
147	unsigned int indirect;	/* bit-field causes misalignment */
148        union {
149		s32 integer[128];
150		unsigned char data[512];
151#ifndef CONFIG_X86_64
152		s64 integer64[64];
153#endif
154        } value;
155        unsigned char reserved[128];
156};
157
158#ifdef CONFIG_X86_X32
159/* x32 has a different alignment for 64bit values from ia32 */
160struct snd_ctl_elem_value_x32 {
161	struct snd_ctl_elem_id id;
162	unsigned int indirect;	/* bit-field causes misalignment */
163	union {
164		s32 integer[128];
165		unsigned char data[512];
166		s64 integer64[64];
167	} value;
168	unsigned char reserved[128];
169};
170#endif /* CONFIG_X86_X32 */
171
172/* get the value type and count of the control */
173static int get_ctl_type(struct snd_card *card, struct snd_ctl_elem_id *id,
174			int *countp)
175{
176	struct snd_kcontrol *kctl;
177	struct snd_ctl_elem_info *info;
178	int err;
179
180	down_read(&card->controls_rwsem);
181	kctl = snd_ctl_find_id(card, id);
182	if (! kctl) {
183		up_read(&card->controls_rwsem);
184		return -ENOENT;
185	}
186	info = kzalloc(sizeof(*info), GFP_KERNEL);
187	if (info == NULL) {
188		up_read(&card->controls_rwsem);
189		return -ENOMEM;
190	}
191	info->id = *id;
192	err = kctl->info(kctl, info);
193	up_read(&card->controls_rwsem);
194	if (err >= 0) {
195		err = info->type;
196		*countp = info->count;
197	}
198	kfree(info);
199	return err;
200}
201
202static int get_elem_size(int type, int count)
203{
204	switch (type) {
205	case SNDRV_CTL_ELEM_TYPE_INTEGER64:
206		return sizeof(s64) * count;
207	case SNDRV_CTL_ELEM_TYPE_ENUMERATED:
208		return sizeof(int) * count;
209	case SNDRV_CTL_ELEM_TYPE_BYTES:
210		return 512;
211	case SNDRV_CTL_ELEM_TYPE_IEC958:
212		return sizeof(struct snd_aes_iec958);
213	default:
214		return -1;
215	}
216}
217
218static int copy_ctl_value_from_user(struct snd_card *card,
219				    struct snd_ctl_elem_value *data,
220				    void __user *userdata,
221				    void __user *valuep,
222				    int *typep, int *countp)
223{
224	struct snd_ctl_elem_value32 __user *data32 = userdata;
225	int i, type, size;
226	int uninitialized_var(count);
227	unsigned int indirect;
228
229	if (copy_from_user(&data->id, &data32->id, sizeof(data->id)))
230		return -EFAULT;
231	if (get_user(indirect, &data32->indirect))
232		return -EFAULT;
233	if (indirect)
234		return -EINVAL;
235	type = get_ctl_type(card, &data->id, &count);
236	if (type < 0)
237		return type;
238
239	if (type == SNDRV_CTL_ELEM_TYPE_BOOLEAN ||
240	    type == SNDRV_CTL_ELEM_TYPE_INTEGER) {
241		for (i = 0; i < count; i++) {
242			s32 __user *intp = valuep;
243			int val;
244			if (get_user(val, &intp[i]))
245				return -EFAULT;
246			data->value.integer.value[i] = val;
247		}
248	} else {
249		size = get_elem_size(type, count);
250		if (size < 0) {
251			dev_err(card->dev, "snd_ioctl32_ctl_elem_value: unknown type %d\n", type);
252			return -EINVAL;
253		}
254		if (copy_from_user(data->value.bytes.data, valuep, size))
 
255			return -EFAULT;
256	}
257
258	*typep = type;
259	*countp = count;
260	return 0;
261}
262
263/* restore the value to 32bit */
264static int copy_ctl_value_to_user(void __user *userdata,
265				  void __user *valuep,
266				  struct snd_ctl_elem_value *data,
267				  int type, int count)
268{
269	int i, size;
270
271	if (type == SNDRV_CTL_ELEM_TYPE_BOOLEAN ||
272	    type == SNDRV_CTL_ELEM_TYPE_INTEGER) {
273		for (i = 0; i < count; i++) {
274			s32 __user *intp = valuep;
275			int val;
276			val = data->value.integer.value[i];
277			if (put_user(val, &intp[i]))
278				return -EFAULT;
279		}
280	} else {
281		size = get_elem_size(type, count);
282		if (copy_to_user(valuep, data->value.bytes.data, size))
 
283			return -EFAULT;
284	}
285	return 0;
286}
287
288static int ctl_elem_read_user(struct snd_card *card,
289			      void __user *userdata, void __user *valuep)
290{
291	struct snd_ctl_elem_value *data;
292	int err, type, count;
293
294	data = kzalloc(sizeof(*data), GFP_KERNEL);
295	if (data == NULL)
296		return -ENOMEM;
297
298	err = copy_ctl_value_from_user(card, data, userdata, valuep,
299				       &type, &count);
300	if (err < 0)
301		goto error;
302
 
303	err = snd_power_wait(card, SNDRV_CTL_POWER_D0);
304	if (err < 0)
305		goto error;
306	err = snd_ctl_elem_read(card, data);
307	if (err < 0)
308		goto error;
309	err = copy_ctl_value_to_user(userdata, valuep, data, type, count);
310 error:
311	kfree(data);
312	return err;
313}
314
315static int ctl_elem_write_user(struct snd_ctl_file *file,
316			       void __user *userdata, void __user *valuep)
317{
318	struct snd_ctl_elem_value *data;
319	struct snd_card *card = file->card;
320	int err, type, count;
321
322	data = kzalloc(sizeof(*data), GFP_KERNEL);
323	if (data == NULL)
324		return -ENOMEM;
325
326	err = copy_ctl_value_from_user(card, data, userdata, valuep,
327				       &type, &count);
328	if (err < 0)
329		goto error;
330
 
331	err = snd_power_wait(card, SNDRV_CTL_POWER_D0);
332	if (err < 0)
333		goto error;
334	err = snd_ctl_elem_write(card, file, data);
335	if (err < 0)
336		goto error;
337	err = copy_ctl_value_to_user(userdata, valuep, data, type, count);
338 error:
339	kfree(data);
340	return err;
341}
342
343static int snd_ctl_elem_read_user_compat(struct snd_card *card,
344					 struct snd_ctl_elem_value32 __user *data32)
345{
346	return ctl_elem_read_user(card, data32, &data32->value);
347}
348
349static int snd_ctl_elem_write_user_compat(struct snd_ctl_file *file,
350					  struct snd_ctl_elem_value32 __user *data32)
351{
352	return ctl_elem_write_user(file, data32, &data32->value);
353}
354
355#ifdef CONFIG_X86_X32
356static int snd_ctl_elem_read_user_x32(struct snd_card *card,
357				      struct snd_ctl_elem_value_x32 __user *data32)
358{
359	return ctl_elem_read_user(card, data32, &data32->value);
360}
361
362static int snd_ctl_elem_write_user_x32(struct snd_ctl_file *file,
363				       struct snd_ctl_elem_value_x32 __user *data32)
364{
365	return ctl_elem_write_user(file, data32, &data32->value);
366}
367#endif /* CONFIG_X86_X32 */
368
369/* add or replace a user control */
370static int snd_ctl_elem_add_compat(struct snd_ctl_file *file,
371				   struct snd_ctl_elem_info32 __user *data32,
372				   int replace)
373{
374	struct snd_ctl_elem_info *data;
375	int err;
376
377	data = kzalloc(sizeof(*data), GFP_KERNEL);
378	if (! data)
379		return -ENOMEM;
380
381	err = -EFAULT;
382	/* id, type, access, count */ \
383	if (copy_from_user(&data->id, &data32->id, sizeof(data->id)) ||
384	    copy_from_user(&data->type, &data32->type, 3 * sizeof(u32)))
385		goto error;
386	if (get_user(data->owner, &data32->owner))
 
387		goto error;
388	switch (data->type) {
389	case SNDRV_CTL_ELEM_TYPE_BOOLEAN:
390	case SNDRV_CTL_ELEM_TYPE_INTEGER:
391		if (get_user(data->value.integer.min, &data32->value.integer.min) ||
392		    get_user(data->value.integer.max, &data32->value.integer.max) ||
393		    get_user(data->value.integer.step, &data32->value.integer.step))
394			goto error;
395		break;
396	case SNDRV_CTL_ELEM_TYPE_INTEGER64:
397		if (copy_from_user(&data->value.integer64,
398				   &data32->value.integer64,
399				   sizeof(data->value.integer64)))
400			goto error;
401		break;
402	case SNDRV_CTL_ELEM_TYPE_ENUMERATED:
403		if (copy_from_user(&data->value.enumerated,
404				   &data32->value.enumerated,
405				   sizeof(data->value.enumerated)))
406			goto error;
407		data->value.enumerated.names_ptr =
408			(uintptr_t)compat_ptr(data->value.enumerated.names_ptr);
409		break;
410	default:
411		break;
412	}
413	err = snd_ctl_elem_add(file, data, replace);
414 error:
415	kfree(data);
416	return err;
417}  
418
419enum {
420	SNDRV_CTL_IOCTL_ELEM_LIST32 = _IOWR('U', 0x10, struct snd_ctl_elem_list32),
421	SNDRV_CTL_IOCTL_ELEM_INFO32 = _IOWR('U', 0x11, struct snd_ctl_elem_info32),
422	SNDRV_CTL_IOCTL_ELEM_READ32 = _IOWR('U', 0x12, struct snd_ctl_elem_value32),
423	SNDRV_CTL_IOCTL_ELEM_WRITE32 = _IOWR('U', 0x13, struct snd_ctl_elem_value32),
424	SNDRV_CTL_IOCTL_ELEM_ADD32 = _IOWR('U', 0x17, struct snd_ctl_elem_info32),
425	SNDRV_CTL_IOCTL_ELEM_REPLACE32 = _IOWR('U', 0x18, struct snd_ctl_elem_info32),
426#ifdef CONFIG_X86_X32
427	SNDRV_CTL_IOCTL_ELEM_READ_X32 = _IOWR('U', 0x12, struct snd_ctl_elem_value_x32),
428	SNDRV_CTL_IOCTL_ELEM_WRITE_X32 = _IOWR('U', 0x13, struct snd_ctl_elem_value_x32),
429#endif /* CONFIG_X86_X32 */
430};
431
432static inline long snd_ctl_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg)
433{
434	struct snd_ctl_file *ctl;
435	struct snd_kctl_ioctl *p;
436	void __user *argp = compat_ptr(arg);
437	int err;
438
439	ctl = file->private_data;
440	if (snd_BUG_ON(!ctl || !ctl->card))
441		return -ENXIO;
442
443	switch (cmd) {
444	case SNDRV_CTL_IOCTL_PVERSION:
445	case SNDRV_CTL_IOCTL_CARD_INFO:
446	case SNDRV_CTL_IOCTL_SUBSCRIBE_EVENTS:
447	case SNDRV_CTL_IOCTL_POWER:
448	case SNDRV_CTL_IOCTL_POWER_STATE:
449	case SNDRV_CTL_IOCTL_ELEM_LOCK:
450	case SNDRV_CTL_IOCTL_ELEM_UNLOCK:
451	case SNDRV_CTL_IOCTL_ELEM_REMOVE:
452	case SNDRV_CTL_IOCTL_TLV_READ:
453	case SNDRV_CTL_IOCTL_TLV_WRITE:
454	case SNDRV_CTL_IOCTL_TLV_COMMAND:
455		return snd_ctl_ioctl(file, cmd, (unsigned long)argp);
456	case SNDRV_CTL_IOCTL_ELEM_LIST32:
457		return snd_ctl_elem_list_compat(ctl->card, argp);
458	case SNDRV_CTL_IOCTL_ELEM_INFO32:
459		return snd_ctl_elem_info_compat(ctl, argp);
460	case SNDRV_CTL_IOCTL_ELEM_READ32:
461		return snd_ctl_elem_read_user_compat(ctl->card, argp);
462	case SNDRV_CTL_IOCTL_ELEM_WRITE32:
463		return snd_ctl_elem_write_user_compat(ctl, argp);
464	case SNDRV_CTL_IOCTL_ELEM_ADD32:
465		return snd_ctl_elem_add_compat(ctl, argp, 0);
466	case SNDRV_CTL_IOCTL_ELEM_REPLACE32:
467		return snd_ctl_elem_add_compat(ctl, argp, 1);
468#ifdef CONFIG_X86_X32
469	case SNDRV_CTL_IOCTL_ELEM_READ_X32:
470		return snd_ctl_elem_read_user_x32(ctl->card, argp);
471	case SNDRV_CTL_IOCTL_ELEM_WRITE_X32:
472		return snd_ctl_elem_write_user_x32(ctl, argp);
473#endif /* CONFIG_X86_X32 */
474	}
475
476	down_read(&snd_ioctl_rwsem);
477	list_for_each_entry(p, &snd_control_compat_ioctls, list) {
478		if (p->fioctl) {
479			err = p->fioctl(ctl->card, ctl, cmd, arg);
480			if (err != -ENOIOCTLCMD) {
481				up_read(&snd_ioctl_rwsem);
482				return err;
483			}
484		}
485	}
486	up_read(&snd_ioctl_rwsem);
487	return -ENOIOCTLCMD;
488}
v3.1
 
  1/*
  2 * compat ioctls for control API
  3 *
  4 *   Copyright (c) by Takashi Iwai <tiwai@suse.de>
  5 *
  6 *   This program is free software; you can redistribute it and/or modify
  7 *   it under the terms of the GNU General Public License as published by
  8 *   the Free Software Foundation; either version 2 of the License, or
  9 *   (at your option) any later version.
 10 *
 11 *   This program is distributed in the hope that it will be useful,
 12 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 13 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 14 *   GNU General Public License for more details.
 15 *
 16 *   You should have received a copy of the GNU General Public License
 17 *   along with this program; if not, write to the Free Software
 18 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 19 */
 20
 21/* this file included from control.c */
 22
 23#include <linux/compat.h>
 24#include <linux/slab.h>
 25
 26struct snd_ctl_elem_list32 {
 27	u32 offset;
 28	u32 space;
 29	u32 used;
 30	u32 count;
 31	u32 pids;
 32	unsigned char reserved[50];
 33} /* don't set packed attribute here */;
 34
 35static int snd_ctl_elem_list_compat(struct snd_card *card,
 36				    struct snd_ctl_elem_list32 __user *data32)
 37{
 38	struct snd_ctl_elem_list __user *data;
 39	compat_caddr_t ptr;
 40	int err;
 41
 42	data = compat_alloc_user_space(sizeof(*data));
 43
 44	/* offset, space, used, count */
 45	if (copy_in_user(data, data32, 4 * sizeof(u32)))
 46		return -EFAULT;
 47	/* pids */
 48	if (get_user(ptr, &data32->pids) ||
 49	    put_user(compat_ptr(ptr), &data->pids))
 50		return -EFAULT;
 51	err = snd_ctl_elem_list(card, data);
 52	if (err < 0)
 53		return err;
 54	/* copy the result */
 55	if (copy_in_user(data32, data, 4 * sizeof(u32)))
 56		return -EFAULT;
 57	return 0;
 58}
 59
 60/*
 61 * control element info
 62 * it uses union, so the things are not easy..
 63 */
 64
 65struct snd_ctl_elem_info32 {
 66	struct snd_ctl_elem_id id; // the size of struct is same
 67	s32 type;
 68	u32 access;
 69	u32 count;
 70	s32 owner;
 71	union {
 72		struct {
 73			s32 min;
 74			s32 max;
 75			s32 step;
 76		} integer;
 77		struct {
 78			u64 min;
 79			u64 max;
 80			u64 step;
 81		} integer64;
 82		struct {
 83			u32 items;
 84			u32 item;
 85			char name[64];
 
 
 86		} enumerated;
 87		unsigned char reserved[128];
 88	} value;
 89	unsigned char reserved[64];
 90} __attribute__((packed));
 91
 92static int snd_ctl_elem_info_compat(struct snd_ctl_file *ctl,
 93				    struct snd_ctl_elem_info32 __user *data32)
 94{
 95	struct snd_ctl_elem_info *data;
 96	int err;
 97
 98	data = kzalloc(sizeof(*data), GFP_KERNEL);
 99	if (! data)
100		return -ENOMEM;
101
102	err = -EFAULT;
103	/* copy id */
104	if (copy_from_user(&data->id, &data32->id, sizeof(data->id)))
105		goto error;
106	/* we need to copy the item index.
107	 * hope this doesn't break anything..
108	 */
109	if (get_user(data->value.enumerated.item, &data32->value.enumerated.item))
110		goto error;
111
112	snd_power_lock(ctl->card);
113	err = snd_power_wait(ctl->card, SNDRV_CTL_POWER_D0);
114	if (err >= 0)
115		err = snd_ctl_elem_info(ctl, data);
116	snd_power_unlock(ctl->card);
117
118	if (err < 0)
119		goto error;
120	/* restore info to 32bit */
121	err = -EFAULT;
122	/* id, type, access, count */
123	if (copy_to_user(&data32->id, &data->id, sizeof(data->id)) ||
124	    copy_to_user(&data32->type, &data->type, 3 * sizeof(u32)))
125		goto error;
126	if (put_user(data->owner, &data32->owner))
127		goto error;
128	switch (data->type) {
129	case SNDRV_CTL_ELEM_TYPE_BOOLEAN:
130	case SNDRV_CTL_ELEM_TYPE_INTEGER:
131		if (put_user(data->value.integer.min, &data32->value.integer.min) ||
132		    put_user(data->value.integer.max, &data32->value.integer.max) ||
133		    put_user(data->value.integer.step, &data32->value.integer.step))
134			goto error;
135		break;
136	case SNDRV_CTL_ELEM_TYPE_INTEGER64:
137		if (copy_to_user(&data32->value.integer64,
138				 &data->value.integer64,
139				 sizeof(data->value.integer64)))
140			goto error;
141		break;
142	case SNDRV_CTL_ELEM_TYPE_ENUMERATED:
143		if (copy_to_user(&data32->value.enumerated,
144				 &data->value.enumerated,
145				 sizeof(data->value.enumerated)))
146			goto error;
147		break;
148	default:
149		break;
150	}
151	err = 0;
152 error:
153	kfree(data);
154	return err;
155}
156
157/* read / write */
158struct snd_ctl_elem_value32 {
159	struct snd_ctl_elem_id id;
160	unsigned int indirect;	/* bit-field causes misalignment */
161        union {
162		s32 integer[128];
163		unsigned char data[512];
164#ifndef CONFIG_X86_64
165		s64 integer64[64];
166#endif
167        } value;
168        unsigned char reserved[128];
169};
170
 
 
 
 
 
 
 
 
 
 
 
 
 
171
172/* get the value type and count of the control */
173static int get_ctl_type(struct snd_card *card, struct snd_ctl_elem_id *id,
174			int *countp)
175{
176	struct snd_kcontrol *kctl;
177	struct snd_ctl_elem_info *info;
178	int err;
179
180	down_read(&card->controls_rwsem);
181	kctl = snd_ctl_find_id(card, id);
182	if (! kctl) {
183		up_read(&card->controls_rwsem);
184		return -ENXIO;
185	}
186	info = kzalloc(sizeof(*info), GFP_KERNEL);
187	if (info == NULL) {
188		up_read(&card->controls_rwsem);
189		return -ENOMEM;
190	}
191	info->id = *id;
192	err = kctl->info(kctl, info);
193	up_read(&card->controls_rwsem);
194	if (err >= 0) {
195		err = info->type;
196		*countp = info->count;
197	}
198	kfree(info);
199	return err;
200}
201
202static int get_elem_size(int type, int count)
203{
204	switch (type) {
205	case SNDRV_CTL_ELEM_TYPE_INTEGER64:
206		return sizeof(s64) * count;
207	case SNDRV_CTL_ELEM_TYPE_ENUMERATED:
208		return sizeof(int) * count;
209	case SNDRV_CTL_ELEM_TYPE_BYTES:
210		return 512;
211	case SNDRV_CTL_ELEM_TYPE_IEC958:
212		return sizeof(struct snd_aes_iec958);
213	default:
214		return -1;
215	}
216}
217
218static int copy_ctl_value_from_user(struct snd_card *card,
219				    struct snd_ctl_elem_value *data,
220				    struct snd_ctl_elem_value32 __user *data32,
 
221				    int *typep, int *countp)
222{
 
223	int i, type, size;
224	int uninitialized_var(count);
225	unsigned int indirect;
226
227	if (copy_from_user(&data->id, &data32->id, sizeof(data->id)))
228		return -EFAULT;
229	if (get_user(indirect, &data32->indirect))
230		return -EFAULT;
231	if (indirect)
232		return -EINVAL;
233	type = get_ctl_type(card, &data->id, &count);
234	if (type < 0)
235		return type;
236
237	if (type == SNDRV_CTL_ELEM_TYPE_BOOLEAN ||
238	    type == SNDRV_CTL_ELEM_TYPE_INTEGER) {
239		for (i = 0; i < count; i++) {
 
240			int val;
241			if (get_user(val, &data32->value.integer[i]))
242				return -EFAULT;
243			data->value.integer.value[i] = val;
244		}
245	} else {
246		size = get_elem_size(type, count);
247		if (size < 0) {
248			printk(KERN_ERR "snd_ioctl32_ctl_elem_value: unknown type %d\n", type);
249			return -EINVAL;
250		}
251		if (copy_from_user(data->value.bytes.data,
252				   data32->value.data, size))
253			return -EFAULT;
254	}
255
256	*typep = type;
257	*countp = count;
258	return 0;
259}
260
261/* restore the value to 32bit */
262static int copy_ctl_value_to_user(struct snd_ctl_elem_value32 __user *data32,
 
263				  struct snd_ctl_elem_value *data,
264				  int type, int count)
265{
266	int i, size;
267
268	if (type == SNDRV_CTL_ELEM_TYPE_BOOLEAN ||
269	    type == SNDRV_CTL_ELEM_TYPE_INTEGER) {
270		for (i = 0; i < count; i++) {
 
271			int val;
272			val = data->value.integer.value[i];
273			if (put_user(val, &data32->value.integer[i]))
274				return -EFAULT;
275		}
276	} else {
277		size = get_elem_size(type, count);
278		if (copy_to_user(data32->value.data,
279				 data->value.bytes.data, size))
280			return -EFAULT;
281	}
282	return 0;
283}
284
285static int snd_ctl_elem_read_user_compat(struct snd_card *card, 
286					 struct snd_ctl_elem_value32 __user *data32)
287{
288	struct snd_ctl_elem_value *data;
289	int err, type, count;
290
291	data = kzalloc(sizeof(*data), GFP_KERNEL);
292	if (data == NULL)
293		return -ENOMEM;
294
295	if ((err = copy_ctl_value_from_user(card, data, data32, &type, &count)) < 0)
 
 
296		goto error;
297
298	snd_power_lock(card);
299	err = snd_power_wait(card, SNDRV_CTL_POWER_D0);
300	if (err >= 0)
301		err = snd_ctl_elem_read(card, data);
302	snd_power_unlock(card);
303	if (err >= 0)
304		err = copy_ctl_value_to_user(data32, data, type, count);
 
305 error:
306	kfree(data);
307	return err;
308}
309
310static int snd_ctl_elem_write_user_compat(struct snd_ctl_file *file,
311					  struct snd_ctl_elem_value32 __user *data32)
312{
313	struct snd_ctl_elem_value *data;
314	struct snd_card *card = file->card;
315	int err, type, count;
316
317	data = kzalloc(sizeof(*data), GFP_KERNEL);
318	if (data == NULL)
319		return -ENOMEM;
320
321	if ((err = copy_ctl_value_from_user(card, data, data32, &type, &count)) < 0)
 
 
322		goto error;
323
324	snd_power_lock(card);
325	err = snd_power_wait(card, SNDRV_CTL_POWER_D0);
326	if (err >= 0)
327		err = snd_ctl_elem_write(card, file, data);
328	snd_power_unlock(card);
329	if (err >= 0)
330		err = copy_ctl_value_to_user(data32, data, type, count);
 
331 error:
332	kfree(data);
333	return err;
334}
335
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
336/* add or replace a user control */
337static int snd_ctl_elem_add_compat(struct snd_ctl_file *file,
338				   struct snd_ctl_elem_info32 __user *data32,
339				   int replace)
340{
341	struct snd_ctl_elem_info *data;
342	int err;
343
344	data = kzalloc(sizeof(*data), GFP_KERNEL);
345	if (! data)
346		return -ENOMEM;
347
348	err = -EFAULT;
349	/* id, type, access, count */ \
350	if (copy_from_user(&data->id, &data32->id, sizeof(data->id)) ||
351	    copy_from_user(&data->type, &data32->type, 3 * sizeof(u32)))
352		goto error;
353	if (get_user(data->owner, &data32->owner) ||
354	    get_user(data->type, &data32->type))
355		goto error;
356	switch (data->type) {
357	case SNDRV_CTL_ELEM_TYPE_BOOLEAN:
358	case SNDRV_CTL_ELEM_TYPE_INTEGER:
359		if (get_user(data->value.integer.min, &data32->value.integer.min) ||
360		    get_user(data->value.integer.max, &data32->value.integer.max) ||
361		    get_user(data->value.integer.step, &data32->value.integer.step))
362			goto error;
363		break;
364	case SNDRV_CTL_ELEM_TYPE_INTEGER64:
365		if (copy_from_user(&data->value.integer64,
366				   &data32->value.integer64,
367				   sizeof(data->value.integer64)))
368			goto error;
369		break;
370	case SNDRV_CTL_ELEM_TYPE_ENUMERATED:
371		if (copy_from_user(&data->value.enumerated,
372				   &data32->value.enumerated,
373				   sizeof(data->value.enumerated)))
374			goto error;
 
 
375		break;
376	default:
377		break;
378	}
379	err = snd_ctl_elem_add(file, data, replace);
380 error:
381	kfree(data);
382	return err;
383}  
384
385enum {
386	SNDRV_CTL_IOCTL_ELEM_LIST32 = _IOWR('U', 0x10, struct snd_ctl_elem_list32),
387	SNDRV_CTL_IOCTL_ELEM_INFO32 = _IOWR('U', 0x11, struct snd_ctl_elem_info32),
388	SNDRV_CTL_IOCTL_ELEM_READ32 = _IOWR('U', 0x12, struct snd_ctl_elem_value32),
389	SNDRV_CTL_IOCTL_ELEM_WRITE32 = _IOWR('U', 0x13, struct snd_ctl_elem_value32),
390	SNDRV_CTL_IOCTL_ELEM_ADD32 = _IOWR('U', 0x17, struct snd_ctl_elem_info32),
391	SNDRV_CTL_IOCTL_ELEM_REPLACE32 = _IOWR('U', 0x18, struct snd_ctl_elem_info32),
 
 
 
 
392};
393
394static inline long snd_ctl_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg)
395{
396	struct snd_ctl_file *ctl;
397	struct snd_kctl_ioctl *p;
398	void __user *argp = compat_ptr(arg);
399	int err;
400
401	ctl = file->private_data;
402	if (snd_BUG_ON(!ctl || !ctl->card))
403		return -ENXIO;
404
405	switch (cmd) {
406	case SNDRV_CTL_IOCTL_PVERSION:
407	case SNDRV_CTL_IOCTL_CARD_INFO:
408	case SNDRV_CTL_IOCTL_SUBSCRIBE_EVENTS:
409	case SNDRV_CTL_IOCTL_POWER:
410	case SNDRV_CTL_IOCTL_POWER_STATE:
411	case SNDRV_CTL_IOCTL_ELEM_LOCK:
412	case SNDRV_CTL_IOCTL_ELEM_UNLOCK:
413	case SNDRV_CTL_IOCTL_ELEM_REMOVE:
414	case SNDRV_CTL_IOCTL_TLV_READ:
415	case SNDRV_CTL_IOCTL_TLV_WRITE:
416	case SNDRV_CTL_IOCTL_TLV_COMMAND:
417		return snd_ctl_ioctl(file, cmd, (unsigned long)argp);
418	case SNDRV_CTL_IOCTL_ELEM_LIST32:
419		return snd_ctl_elem_list_compat(ctl->card, argp);
420	case SNDRV_CTL_IOCTL_ELEM_INFO32:
421		return snd_ctl_elem_info_compat(ctl, argp);
422	case SNDRV_CTL_IOCTL_ELEM_READ32:
423		return snd_ctl_elem_read_user_compat(ctl->card, argp);
424	case SNDRV_CTL_IOCTL_ELEM_WRITE32:
425		return snd_ctl_elem_write_user_compat(ctl, argp);
426	case SNDRV_CTL_IOCTL_ELEM_ADD32:
427		return snd_ctl_elem_add_compat(ctl, argp, 0);
428	case SNDRV_CTL_IOCTL_ELEM_REPLACE32:
429		return snd_ctl_elem_add_compat(ctl, argp, 1);
 
 
 
 
 
 
430	}
431
432	down_read(&snd_ioctl_rwsem);
433	list_for_each_entry(p, &snd_control_compat_ioctls, list) {
434		if (p->fioctl) {
435			err = p->fioctl(ctl->card, ctl, cmd, arg);
436			if (err != -ENOIOCTLCMD) {
437				up_read(&snd_ioctl_rwsem);
438				return err;
439			}
440		}
441	}
442	up_read(&snd_ioctl_rwsem);
443	return -ENOIOCTLCMD;
444}