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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 u64 names_ptr;
87 u32 names_length;
88 } enumerated;
89 unsigned char reserved[128];
90 } value;
91 unsigned char reserved[64];
92} __attribute__((packed));
93
94static int snd_ctl_elem_info_compat(struct snd_ctl_file *ctl,
95 struct snd_ctl_elem_info32 __user *data32)
96{
97 struct snd_ctl_elem_info *data;
98 int err;
99
100 data = kzalloc(sizeof(*data), GFP_KERNEL);
101 if (! data)
102 return -ENOMEM;
103
104 err = -EFAULT;
105 /* copy id */
106 if (copy_from_user(&data->id, &data32->id, sizeof(data->id)))
107 goto error;
108 /* we need to copy the item index.
109 * hope this doesn't break anything..
110 */
111 if (get_user(data->value.enumerated.item, &data32->value.enumerated.item))
112 goto error;
113
114 snd_power_lock(ctl->card);
115 err = snd_power_wait(ctl->card, SNDRV_CTL_POWER_D0);
116 if (err >= 0)
117 err = snd_ctl_elem_info(ctl, data);
118 snd_power_unlock(ctl->card);
119
120 if (err < 0)
121 goto error;
122 /* restore info to 32bit */
123 err = -EFAULT;
124 /* id, type, access, count */
125 if (copy_to_user(&data32->id, &data->id, sizeof(data->id)) ||
126 copy_to_user(&data32->type, &data->type, 3 * sizeof(u32)))
127 goto error;
128 if (put_user(data->owner, &data32->owner))
129 goto error;
130 switch (data->type) {
131 case SNDRV_CTL_ELEM_TYPE_BOOLEAN:
132 case SNDRV_CTL_ELEM_TYPE_INTEGER:
133 if (put_user(data->value.integer.min, &data32->value.integer.min) ||
134 put_user(data->value.integer.max, &data32->value.integer.max) ||
135 put_user(data->value.integer.step, &data32->value.integer.step))
136 goto error;
137 break;
138 case SNDRV_CTL_ELEM_TYPE_INTEGER64:
139 if (copy_to_user(&data32->value.integer64,
140 &data->value.integer64,
141 sizeof(data->value.integer64)))
142 goto error;
143 break;
144 case SNDRV_CTL_ELEM_TYPE_ENUMERATED:
145 if (copy_to_user(&data32->value.enumerated,
146 &data->value.enumerated,
147 sizeof(data->value.enumerated)))
148 goto error;
149 break;
150 default:
151 break;
152 }
153 err = 0;
154 error:
155 kfree(data);
156 return err;
157}
158
159/* read / write */
160struct snd_ctl_elem_value32 {
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#ifndef CONFIG_X86_64
167 s64 integer64[64];
168#endif
169 } value;
170 unsigned char reserved[128];
171};
172
173#ifdef CONFIG_X86_X32
174/* x32 has a different alignment for 64bit values from ia32 */
175struct snd_ctl_elem_value_x32 {
176 struct snd_ctl_elem_id id;
177 unsigned int indirect; /* bit-field causes misalignment */
178 union {
179 s32 integer[128];
180 unsigned char data[512];
181 s64 integer64[64];
182 } value;
183 unsigned char reserved[128];
184};
185#endif /* CONFIG_X86_X32 */
186
187/* get the value type and count of the control */
188static int get_ctl_type(struct snd_card *card, struct snd_ctl_elem_id *id,
189 int *countp)
190{
191 struct snd_kcontrol *kctl;
192 struct snd_ctl_elem_info *info;
193 int err;
194
195 down_read(&card->controls_rwsem);
196 kctl = snd_ctl_find_id(card, id);
197 if (! kctl) {
198 up_read(&card->controls_rwsem);
199 return -ENOENT;
200 }
201 info = kzalloc(sizeof(*info), GFP_KERNEL);
202 if (info == NULL) {
203 up_read(&card->controls_rwsem);
204 return -ENOMEM;
205 }
206 info->id = *id;
207 err = kctl->info(kctl, info);
208 up_read(&card->controls_rwsem);
209 if (err >= 0) {
210 err = info->type;
211 *countp = info->count;
212 }
213 kfree(info);
214 return err;
215}
216
217static int get_elem_size(int type, int count)
218{
219 switch (type) {
220 case SNDRV_CTL_ELEM_TYPE_INTEGER64:
221 return sizeof(s64) * count;
222 case SNDRV_CTL_ELEM_TYPE_ENUMERATED:
223 return sizeof(int) * count;
224 case SNDRV_CTL_ELEM_TYPE_BYTES:
225 return 512;
226 case SNDRV_CTL_ELEM_TYPE_IEC958:
227 return sizeof(struct snd_aes_iec958);
228 default:
229 return -1;
230 }
231}
232
233static int copy_ctl_value_from_user(struct snd_card *card,
234 struct snd_ctl_elem_value *data,
235 void __user *userdata,
236 void __user *valuep,
237 int *typep, int *countp)
238{
239 struct snd_ctl_elem_value32 __user *data32 = userdata;
240 int i, type, size;
241 int uninitialized_var(count);
242 unsigned int indirect;
243
244 if (copy_from_user(&data->id, &data32->id, sizeof(data->id)))
245 return -EFAULT;
246 if (get_user(indirect, &data32->indirect))
247 return -EFAULT;
248 if (indirect)
249 return -EINVAL;
250 type = get_ctl_type(card, &data->id, &count);
251 if (type < 0)
252 return type;
253
254 if (type == SNDRV_CTL_ELEM_TYPE_BOOLEAN ||
255 type == SNDRV_CTL_ELEM_TYPE_INTEGER) {
256 for (i = 0; i < count; i++) {
257 s32 __user *intp = valuep;
258 int val;
259 if (get_user(val, &intp[i]))
260 return -EFAULT;
261 data->value.integer.value[i] = val;
262 }
263 } else {
264 size = get_elem_size(type, count);
265 if (size < 0) {
266 dev_err(card->dev, "snd_ioctl32_ctl_elem_value: unknown type %d\n", type);
267 return -EINVAL;
268 }
269 if (copy_from_user(data->value.bytes.data, valuep, size))
270 return -EFAULT;
271 }
272
273 *typep = type;
274 *countp = count;
275 return 0;
276}
277
278/* restore the value to 32bit */
279static int copy_ctl_value_to_user(void __user *userdata,
280 void __user *valuep,
281 struct snd_ctl_elem_value *data,
282 int type, int count)
283{
284 int i, size;
285
286 if (type == SNDRV_CTL_ELEM_TYPE_BOOLEAN ||
287 type == SNDRV_CTL_ELEM_TYPE_INTEGER) {
288 for (i = 0; i < count; i++) {
289 s32 __user *intp = valuep;
290 int val;
291 val = data->value.integer.value[i];
292 if (put_user(val, &intp[i]))
293 return -EFAULT;
294 }
295 } else {
296 size = get_elem_size(type, count);
297 if (copy_to_user(valuep, data->value.bytes.data, size))
298 return -EFAULT;
299 }
300 return 0;
301}
302
303static int ctl_elem_read_user(struct snd_card *card,
304 void __user *userdata, void __user *valuep)
305{
306 struct snd_ctl_elem_value *data;
307 int err, type, count;
308
309 data = kzalloc(sizeof(*data), GFP_KERNEL);
310 if (data == NULL)
311 return -ENOMEM;
312
313 err = copy_ctl_value_from_user(card, data, userdata, valuep,
314 &type, &count);
315 if (err < 0)
316 goto error;
317
318 snd_power_lock(card);
319 err = snd_power_wait(card, SNDRV_CTL_POWER_D0);
320 if (err >= 0)
321 err = snd_ctl_elem_read(card, data);
322 snd_power_unlock(card);
323 if (err >= 0)
324 err = copy_ctl_value_to_user(userdata, valuep, data,
325 type, count);
326 error:
327 kfree(data);
328 return err;
329}
330
331static int ctl_elem_write_user(struct snd_ctl_file *file,
332 void __user *userdata, void __user *valuep)
333{
334 struct snd_ctl_elem_value *data;
335 struct snd_card *card = file->card;
336 int err, type, count;
337
338 data = kzalloc(sizeof(*data), GFP_KERNEL);
339 if (data == NULL)
340 return -ENOMEM;
341
342 err = copy_ctl_value_from_user(card, data, userdata, valuep,
343 &type, &count);
344 if (err < 0)
345 goto error;
346
347 snd_power_lock(card);
348 err = snd_power_wait(card, SNDRV_CTL_POWER_D0);
349 if (err >= 0)
350 err = snd_ctl_elem_write(card, file, data);
351 snd_power_unlock(card);
352 if (err >= 0)
353 err = copy_ctl_value_to_user(userdata, valuep, data,
354 type, count);
355 error:
356 kfree(data);
357 return err;
358}
359
360static int snd_ctl_elem_read_user_compat(struct snd_card *card,
361 struct snd_ctl_elem_value32 __user *data32)
362{
363 return ctl_elem_read_user(card, data32, &data32->value);
364}
365
366static int snd_ctl_elem_write_user_compat(struct snd_ctl_file *file,
367 struct snd_ctl_elem_value32 __user *data32)
368{
369 return ctl_elem_write_user(file, data32, &data32->value);
370}
371
372#ifdef CONFIG_X86_X32
373static int snd_ctl_elem_read_user_x32(struct snd_card *card,
374 struct snd_ctl_elem_value_x32 __user *data32)
375{
376 return ctl_elem_read_user(card, data32, &data32->value);
377}
378
379static int snd_ctl_elem_write_user_x32(struct snd_ctl_file *file,
380 struct snd_ctl_elem_value_x32 __user *data32)
381{
382 return ctl_elem_write_user(file, data32, &data32->value);
383}
384#endif /* CONFIG_X86_X32 */
385
386/* add or replace a user control */
387static int snd_ctl_elem_add_compat(struct snd_ctl_file *file,
388 struct snd_ctl_elem_info32 __user *data32,
389 int replace)
390{
391 struct snd_ctl_elem_info *data;
392 int err;
393
394 data = kzalloc(sizeof(*data), GFP_KERNEL);
395 if (! data)
396 return -ENOMEM;
397
398 err = -EFAULT;
399 /* id, type, access, count */ \
400 if (copy_from_user(&data->id, &data32->id, sizeof(data->id)) ||
401 copy_from_user(&data->type, &data32->type, 3 * sizeof(u32)))
402 goto error;
403 if (get_user(data->owner, &data32->owner) ||
404 get_user(data->type, &data32->type))
405 goto error;
406 switch (data->type) {
407 case SNDRV_CTL_ELEM_TYPE_BOOLEAN:
408 case SNDRV_CTL_ELEM_TYPE_INTEGER:
409 if (get_user(data->value.integer.min, &data32->value.integer.min) ||
410 get_user(data->value.integer.max, &data32->value.integer.max) ||
411 get_user(data->value.integer.step, &data32->value.integer.step))
412 goto error;
413 break;
414 case SNDRV_CTL_ELEM_TYPE_INTEGER64:
415 if (copy_from_user(&data->value.integer64,
416 &data32->value.integer64,
417 sizeof(data->value.integer64)))
418 goto error;
419 break;
420 case SNDRV_CTL_ELEM_TYPE_ENUMERATED:
421 if (copy_from_user(&data->value.enumerated,
422 &data32->value.enumerated,
423 sizeof(data->value.enumerated)))
424 goto error;
425 data->value.enumerated.names_ptr =
426 (uintptr_t)compat_ptr(data->value.enumerated.names_ptr);
427 break;
428 default:
429 break;
430 }
431 err = snd_ctl_elem_add(file, data, replace);
432 error:
433 kfree(data);
434 return err;
435}
436
437enum {
438 SNDRV_CTL_IOCTL_ELEM_LIST32 = _IOWR('U', 0x10, struct snd_ctl_elem_list32),
439 SNDRV_CTL_IOCTL_ELEM_INFO32 = _IOWR('U', 0x11, struct snd_ctl_elem_info32),
440 SNDRV_CTL_IOCTL_ELEM_READ32 = _IOWR('U', 0x12, struct snd_ctl_elem_value32),
441 SNDRV_CTL_IOCTL_ELEM_WRITE32 = _IOWR('U', 0x13, struct snd_ctl_elem_value32),
442 SNDRV_CTL_IOCTL_ELEM_ADD32 = _IOWR('U', 0x17, struct snd_ctl_elem_info32),
443 SNDRV_CTL_IOCTL_ELEM_REPLACE32 = _IOWR('U', 0x18, struct snd_ctl_elem_info32),
444#ifdef CONFIG_X86_X32
445 SNDRV_CTL_IOCTL_ELEM_READ_X32 = _IOWR('U', 0x12, struct snd_ctl_elem_value_x32),
446 SNDRV_CTL_IOCTL_ELEM_WRITE_X32 = _IOWR('U', 0x13, struct snd_ctl_elem_value_x32),
447#endif /* CONFIG_X86_X32 */
448};
449
450static inline long snd_ctl_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg)
451{
452 struct snd_ctl_file *ctl;
453 struct snd_kctl_ioctl *p;
454 void __user *argp = compat_ptr(arg);
455 int err;
456
457 ctl = file->private_data;
458 if (snd_BUG_ON(!ctl || !ctl->card))
459 return -ENXIO;
460
461 switch (cmd) {
462 case SNDRV_CTL_IOCTL_PVERSION:
463 case SNDRV_CTL_IOCTL_CARD_INFO:
464 case SNDRV_CTL_IOCTL_SUBSCRIBE_EVENTS:
465 case SNDRV_CTL_IOCTL_POWER:
466 case SNDRV_CTL_IOCTL_POWER_STATE:
467 case SNDRV_CTL_IOCTL_ELEM_LOCK:
468 case SNDRV_CTL_IOCTL_ELEM_UNLOCK:
469 case SNDRV_CTL_IOCTL_ELEM_REMOVE:
470 case SNDRV_CTL_IOCTL_TLV_READ:
471 case SNDRV_CTL_IOCTL_TLV_WRITE:
472 case SNDRV_CTL_IOCTL_TLV_COMMAND:
473 return snd_ctl_ioctl(file, cmd, (unsigned long)argp);
474 case SNDRV_CTL_IOCTL_ELEM_LIST32:
475 return snd_ctl_elem_list_compat(ctl->card, argp);
476 case SNDRV_CTL_IOCTL_ELEM_INFO32:
477 return snd_ctl_elem_info_compat(ctl, argp);
478 case SNDRV_CTL_IOCTL_ELEM_READ32:
479 return snd_ctl_elem_read_user_compat(ctl->card, argp);
480 case SNDRV_CTL_IOCTL_ELEM_WRITE32:
481 return snd_ctl_elem_write_user_compat(ctl, argp);
482 case SNDRV_CTL_IOCTL_ELEM_ADD32:
483 return snd_ctl_elem_add_compat(ctl, argp, 0);
484 case SNDRV_CTL_IOCTL_ELEM_REPLACE32:
485 return snd_ctl_elem_add_compat(ctl, argp, 1);
486#ifdef CONFIG_X86_X32
487 case SNDRV_CTL_IOCTL_ELEM_READ_X32:
488 return snd_ctl_elem_read_user_x32(ctl->card, argp);
489 case SNDRV_CTL_IOCTL_ELEM_WRITE_X32:
490 return snd_ctl_elem_write_user_x32(ctl, argp);
491#endif /* CONFIG_X86_X32 */
492 }
493
494 down_read(&snd_ioctl_rwsem);
495 list_for_each_entry(p, &snd_control_compat_ioctls, list) {
496 if (p->fioctl) {
497 err = p->fioctl(ctl->card, ctl, cmd, arg);
498 if (err != -ENOIOCTLCMD) {
499 up_read(&snd_ioctl_rwsem);
500 return err;
501 }
502 }
503 }
504 up_read(&snd_ioctl_rwsem);
505 return -ENOIOCTLCMD;
506}
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 u64 names_ptr;
87 u32 names_length;
88 } enumerated;
89 unsigned char reserved[128];
90 } value;
91 unsigned char reserved[64];
92} __attribute__((packed));
93
94static int snd_ctl_elem_info_compat(struct snd_ctl_file *ctl,
95 struct snd_ctl_elem_info32 __user *data32)
96{
97 struct snd_ctl_elem_info *data;
98 int err;
99
100 data = kzalloc(sizeof(*data), GFP_KERNEL);
101 if (! data)
102 return -ENOMEM;
103
104 err = -EFAULT;
105 /* copy id */
106 if (copy_from_user(&data->id, &data32->id, sizeof(data->id)))
107 goto error;
108 /* we need to copy the item index.
109 * hope this doesn't break anything..
110 */
111 if (get_user(data->value.enumerated.item, &data32->value.enumerated.item))
112 goto error;
113
114 snd_power_lock(ctl->card);
115 err = snd_power_wait(ctl->card, SNDRV_CTL_POWER_D0);
116 if (err >= 0)
117 err = snd_ctl_elem_info(ctl, data);
118 snd_power_unlock(ctl->card);
119
120 if (err < 0)
121 goto error;
122 /* restore info to 32bit */
123 err = -EFAULT;
124 /* id, type, access, count */
125 if (copy_to_user(&data32->id, &data->id, sizeof(data->id)) ||
126 copy_to_user(&data32->type, &data->type, 3 * sizeof(u32)))
127 goto error;
128 if (put_user(data->owner, &data32->owner))
129 goto error;
130 switch (data->type) {
131 case SNDRV_CTL_ELEM_TYPE_BOOLEAN:
132 case SNDRV_CTL_ELEM_TYPE_INTEGER:
133 if (put_user(data->value.integer.min, &data32->value.integer.min) ||
134 put_user(data->value.integer.max, &data32->value.integer.max) ||
135 put_user(data->value.integer.step, &data32->value.integer.step))
136 goto error;
137 break;
138 case SNDRV_CTL_ELEM_TYPE_INTEGER64:
139 if (copy_to_user(&data32->value.integer64,
140 &data->value.integer64,
141 sizeof(data->value.integer64)))
142 goto error;
143 break;
144 case SNDRV_CTL_ELEM_TYPE_ENUMERATED:
145 if (copy_to_user(&data32->value.enumerated,
146 &data->value.enumerated,
147 sizeof(data->value.enumerated)))
148 goto error;
149 break;
150 default:
151 break;
152 }
153 err = 0;
154 error:
155 kfree(data);
156 return err;
157}
158
159/* read / write */
160struct snd_ctl_elem_value32 {
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#ifndef CONFIG_X86_64
167 s64 integer64[64];
168#endif
169 } value;
170 unsigned char reserved[128];
171};
172
173
174/* get the value type and count of the control */
175static int get_ctl_type(struct snd_card *card, struct snd_ctl_elem_id *id,
176 int *countp)
177{
178 struct snd_kcontrol *kctl;
179 struct snd_ctl_elem_info *info;
180 int err;
181
182 down_read(&card->controls_rwsem);
183 kctl = snd_ctl_find_id(card, id);
184 if (! kctl) {
185 up_read(&card->controls_rwsem);
186 return -ENXIO;
187 }
188 info = kzalloc(sizeof(*info), GFP_KERNEL);
189 if (info == NULL) {
190 up_read(&card->controls_rwsem);
191 return -ENOMEM;
192 }
193 info->id = *id;
194 err = kctl->info(kctl, info);
195 up_read(&card->controls_rwsem);
196 if (err >= 0) {
197 err = info->type;
198 *countp = info->count;
199 }
200 kfree(info);
201 return err;
202}
203
204static int get_elem_size(int type, int count)
205{
206 switch (type) {
207 case SNDRV_CTL_ELEM_TYPE_INTEGER64:
208 return sizeof(s64) * count;
209 case SNDRV_CTL_ELEM_TYPE_ENUMERATED:
210 return sizeof(int) * count;
211 case SNDRV_CTL_ELEM_TYPE_BYTES:
212 return 512;
213 case SNDRV_CTL_ELEM_TYPE_IEC958:
214 return sizeof(struct snd_aes_iec958);
215 default:
216 return -1;
217 }
218}
219
220static int copy_ctl_value_from_user(struct snd_card *card,
221 struct snd_ctl_elem_value *data,
222 struct snd_ctl_elem_value32 __user *data32,
223 int *typep, int *countp)
224{
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 int val;
243 if (get_user(val, &data32->value.integer[i]))
244 return -EFAULT;
245 data->value.integer.value[i] = val;
246 }
247 } else {
248 size = get_elem_size(type, count);
249 if (size < 0) {
250 dev_err(card->dev, "snd_ioctl32_ctl_elem_value: unknown type %d\n", type);
251 return -EINVAL;
252 }
253 if (copy_from_user(data->value.bytes.data,
254 data32->value.data, 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(struct snd_ctl_elem_value32 __user *data32,
265 struct snd_ctl_elem_value *data,
266 int type, int count)
267{
268 int i, size;
269
270 if (type == SNDRV_CTL_ELEM_TYPE_BOOLEAN ||
271 type == SNDRV_CTL_ELEM_TYPE_INTEGER) {
272 for (i = 0; i < count; i++) {
273 int val;
274 val = data->value.integer.value[i];
275 if (put_user(val, &data32->value.integer[i]))
276 return -EFAULT;
277 }
278 } else {
279 size = get_elem_size(type, count);
280 if (copy_to_user(data32->value.data,
281 data->value.bytes.data, size))
282 return -EFAULT;
283 }
284 return 0;
285}
286
287static int snd_ctl_elem_read_user_compat(struct snd_card *card,
288 struct snd_ctl_elem_value32 __user *data32)
289{
290 struct snd_ctl_elem_value *data;
291 int err, type, count;
292
293 data = kzalloc(sizeof(*data), GFP_KERNEL);
294 if (data == NULL)
295 return -ENOMEM;
296
297 if ((err = copy_ctl_value_from_user(card, data, data32, &type, &count)) < 0)
298 goto error;
299
300 snd_power_lock(card);
301 err = snd_power_wait(card, SNDRV_CTL_POWER_D0);
302 if (err >= 0)
303 err = snd_ctl_elem_read(card, data);
304 snd_power_unlock(card);
305 if (err >= 0)
306 err = copy_ctl_value_to_user(data32, data, type, count);
307 error:
308 kfree(data);
309 return err;
310}
311
312static int snd_ctl_elem_write_user_compat(struct snd_ctl_file *file,
313 struct snd_ctl_elem_value32 __user *data32)
314{
315 struct snd_ctl_elem_value *data;
316 struct snd_card *card = file->card;
317 int err, type, count;
318
319 data = kzalloc(sizeof(*data), GFP_KERNEL);
320 if (data == NULL)
321 return -ENOMEM;
322
323 if ((err = copy_ctl_value_from_user(card, data, data32, &type, &count)) < 0)
324 goto error;
325
326 snd_power_lock(card);
327 err = snd_power_wait(card, SNDRV_CTL_POWER_D0);
328 if (err >= 0)
329 err = snd_ctl_elem_write(card, file, data);
330 snd_power_unlock(card);
331 if (err >= 0)
332 err = copy_ctl_value_to_user(data32, data, type, count);
333 error:
334 kfree(data);
335 return err;
336}
337
338/* add or replace a user control */
339static int snd_ctl_elem_add_compat(struct snd_ctl_file *file,
340 struct snd_ctl_elem_info32 __user *data32,
341 int replace)
342{
343 struct snd_ctl_elem_info *data;
344 int err;
345
346 data = kzalloc(sizeof(*data), GFP_KERNEL);
347 if (! data)
348 return -ENOMEM;
349
350 err = -EFAULT;
351 /* id, type, access, count */ \
352 if (copy_from_user(&data->id, &data32->id, sizeof(data->id)) ||
353 copy_from_user(&data->type, &data32->type, 3 * sizeof(u32)))
354 goto error;
355 if (get_user(data->owner, &data32->owner) ||
356 get_user(data->type, &data32->type))
357 goto error;
358 switch (data->type) {
359 case SNDRV_CTL_ELEM_TYPE_BOOLEAN:
360 case SNDRV_CTL_ELEM_TYPE_INTEGER:
361 if (get_user(data->value.integer.min, &data32->value.integer.min) ||
362 get_user(data->value.integer.max, &data32->value.integer.max) ||
363 get_user(data->value.integer.step, &data32->value.integer.step))
364 goto error;
365 break;
366 case SNDRV_CTL_ELEM_TYPE_INTEGER64:
367 if (copy_from_user(&data->value.integer64,
368 &data32->value.integer64,
369 sizeof(data->value.integer64)))
370 goto error;
371 break;
372 case SNDRV_CTL_ELEM_TYPE_ENUMERATED:
373 if (copy_from_user(&data->value.enumerated,
374 &data32->value.enumerated,
375 sizeof(data->value.enumerated)))
376 goto error;
377 data->value.enumerated.names_ptr =
378 (uintptr_t)compat_ptr(data->value.enumerated.names_ptr);
379 break;
380 default:
381 break;
382 }
383 err = snd_ctl_elem_add(file, data, replace);
384 error:
385 kfree(data);
386 return err;
387}
388
389enum {
390 SNDRV_CTL_IOCTL_ELEM_LIST32 = _IOWR('U', 0x10, struct snd_ctl_elem_list32),
391 SNDRV_CTL_IOCTL_ELEM_INFO32 = _IOWR('U', 0x11, struct snd_ctl_elem_info32),
392 SNDRV_CTL_IOCTL_ELEM_READ32 = _IOWR('U', 0x12, struct snd_ctl_elem_value32),
393 SNDRV_CTL_IOCTL_ELEM_WRITE32 = _IOWR('U', 0x13, struct snd_ctl_elem_value32),
394 SNDRV_CTL_IOCTL_ELEM_ADD32 = _IOWR('U', 0x17, struct snd_ctl_elem_info32),
395 SNDRV_CTL_IOCTL_ELEM_REPLACE32 = _IOWR('U', 0x18, struct snd_ctl_elem_info32),
396};
397
398static inline long snd_ctl_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg)
399{
400 struct snd_ctl_file *ctl;
401 struct snd_kctl_ioctl *p;
402 void __user *argp = compat_ptr(arg);
403 int err;
404
405 ctl = file->private_data;
406 if (snd_BUG_ON(!ctl || !ctl->card))
407 return -ENXIO;
408
409 switch (cmd) {
410 case SNDRV_CTL_IOCTL_PVERSION:
411 case SNDRV_CTL_IOCTL_CARD_INFO:
412 case SNDRV_CTL_IOCTL_SUBSCRIBE_EVENTS:
413 case SNDRV_CTL_IOCTL_POWER:
414 case SNDRV_CTL_IOCTL_POWER_STATE:
415 case SNDRV_CTL_IOCTL_ELEM_LOCK:
416 case SNDRV_CTL_IOCTL_ELEM_UNLOCK:
417 case SNDRV_CTL_IOCTL_ELEM_REMOVE:
418 case SNDRV_CTL_IOCTL_TLV_READ:
419 case SNDRV_CTL_IOCTL_TLV_WRITE:
420 case SNDRV_CTL_IOCTL_TLV_COMMAND:
421 return snd_ctl_ioctl(file, cmd, (unsigned long)argp);
422 case SNDRV_CTL_IOCTL_ELEM_LIST32:
423 return snd_ctl_elem_list_compat(ctl->card, argp);
424 case SNDRV_CTL_IOCTL_ELEM_INFO32:
425 return snd_ctl_elem_info_compat(ctl, argp);
426 case SNDRV_CTL_IOCTL_ELEM_READ32:
427 return snd_ctl_elem_read_user_compat(ctl->card, argp);
428 case SNDRV_CTL_IOCTL_ELEM_WRITE32:
429 return snd_ctl_elem_write_user_compat(ctl, argp);
430 case SNDRV_CTL_IOCTL_ELEM_ADD32:
431 return snd_ctl_elem_add_compat(ctl, argp, 0);
432 case SNDRV_CTL_IOCTL_ELEM_REPLACE32:
433 return snd_ctl_elem_add_compat(ctl, argp, 1);
434 }
435
436 down_read(&snd_ioctl_rwsem);
437 list_for_each_entry(p, &snd_control_compat_ioctls, list) {
438 if (p->fioctl) {
439 err = p->fioctl(ctl->card, ctl, cmd, arg);
440 if (err != -ENOIOCTLCMD) {
441 up_read(&snd_ioctl_rwsem);
442 return err;
443 }
444 }
445 }
446 up_read(&snd_ioctl_rwsem);
447 return -ENOIOCTLCMD;
448}