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