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9#include <linux/compat.h>
10#include <linux/slab.h>
11
12static int snd_pcm_ioctl_delay_compat(struct snd_pcm_substream *substream,
13 s32 __user *src)
14{
15 snd_pcm_sframes_t delay;
16 int err;
17
18 err = snd_pcm_delay(substream, &delay);
19 if (err)
20 return err;
21 if (put_user(delay, src))
22 return -EFAULT;
23 return 0;
24}
25
26static int snd_pcm_ioctl_rewind_compat(struct snd_pcm_substream *substream,
27 u32 __user *src)
28{
29 snd_pcm_uframes_t frames;
30 int err;
31
32 if (get_user(frames, src))
33 return -EFAULT;
34 err = snd_pcm_rewind(substream, frames);
35 if (put_user(err, src))
36 return -EFAULT;
37 return err < 0 ? err : 0;
38}
39
40static int snd_pcm_ioctl_forward_compat(struct snd_pcm_substream *substream,
41 u32 __user *src)
42{
43 snd_pcm_uframes_t frames;
44 int err;
45
46 if (get_user(frames, src))
47 return -EFAULT;
48 err = snd_pcm_forward(substream, frames);
49 if (put_user(err, src))
50 return -EFAULT;
51 return err < 0 ? err : 0;
52}
53
54struct snd_pcm_hw_params32 {
55 u32 flags;
56 struct snd_mask masks[SNDRV_PCM_HW_PARAM_LAST_MASK - SNDRV_PCM_HW_PARAM_FIRST_MASK + 1];
57 struct snd_mask mres[5];
58 struct snd_interval intervals[SNDRV_PCM_HW_PARAM_LAST_INTERVAL - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL + 1];
59 struct snd_interval ires[9];
60 u32 rmask;
61 u32 cmask;
62 u32 info;
63 u32 msbits;
64 u32 rate_num;
65 u32 rate_den;
66 u32 fifo_size;
67 unsigned char reserved[64];
68};
69
70struct snd_pcm_sw_params32 {
71 s32 tstamp_mode;
72 u32 period_step;
73 u32 sleep_min;
74 u32 avail_min;
75 u32 xfer_align;
76 u32 start_threshold;
77 u32 stop_threshold;
78 u32 silence_threshold;
79 u32 silence_size;
80 u32 boundary;
81 u32 proto;
82 u32 tstamp_type;
83 unsigned char reserved[56];
84};
85
86static int snd_pcm_ioctl_sw_params_compat(struct snd_pcm_substream *substream,
87 struct snd_pcm_sw_params32 __user *src)
88{
89 struct snd_pcm_sw_params params;
90 snd_pcm_uframes_t boundary;
91 int err;
92
93 memset(¶ms, 0, sizeof(params));
94 if (get_user(params.tstamp_mode, &src->tstamp_mode) ||
95 get_user(params.period_step, &src->period_step) ||
96 get_user(params.sleep_min, &src->sleep_min) ||
97 get_user(params.avail_min, &src->avail_min) ||
98 get_user(params.xfer_align, &src->xfer_align) ||
99 get_user(params.start_threshold, &src->start_threshold) ||
100 get_user(params.stop_threshold, &src->stop_threshold) ||
101 get_user(params.silence_threshold, &src->silence_threshold) ||
102 get_user(params.silence_size, &src->silence_size) ||
103 get_user(params.tstamp_type, &src->tstamp_type) ||
104 get_user(params.proto, &src->proto))
105 return -EFAULT;
106
107
108
109
110 boundary = recalculate_boundary(substream->runtime);
111 if (boundary && params.silence_size >= boundary)
112 params.silence_size = substream->runtime->boundary;
113 err = snd_pcm_sw_params(substream, ¶ms);
114 if (err < 0)
115 return err;
116 if (boundary && put_user(boundary, &src->boundary))
117 return -EFAULT;
118 return err;
119}
120
121struct snd_pcm_channel_info32 {
122 u32 channel;
123 u32 offset;
124 u32 first;
125 u32 step;
126};
127
128static int snd_pcm_ioctl_channel_info_compat(struct snd_pcm_substream *substream,
129 struct snd_pcm_channel_info32 __user *src)
130{
131 struct snd_pcm_channel_info info;
132 int err;
133
134 if (get_user(info.channel, &src->channel) ||
135 get_user(info.offset, &src->offset) ||
136 get_user(info.first, &src->first) ||
137 get_user(info.step, &src->step))
138 return -EFAULT;
139 err = snd_pcm_channel_info(substream, &info);
140 if (err < 0)
141 return err;
142 if (put_user(info.channel, &src->channel) ||
143 put_user(info.offset, &src->offset) ||
144 put_user(info.first, &src->first) ||
145 put_user(info.step, &src->step))
146 return -EFAULT;
147 return err;
148}
149
150#ifdef CONFIG_X86_X32
151
152static int snd_pcm_channel_info_user(struct snd_pcm_substream *substream,
153 struct snd_pcm_channel_info __user *src);
154#define snd_pcm_ioctl_channel_info_x32(s, p) \
155 snd_pcm_channel_info_user(s, p)
156#endif
157
158struct compat_snd_pcm_status64 {
159 snd_pcm_state_t state;
160 u8 rsvd[4];
161 s64 trigger_tstamp_sec;
162 s64 trigger_tstamp_nsec;
163 s64 tstamp_sec;
164 s64 tstamp_nsec;
165 u32 appl_ptr;
166 u32 hw_ptr;
167 s32 delay;
168 u32 avail;
169 u32 avail_max;
170 u32 overrange;
171 snd_pcm_state_t suspended_state;
172 u32 audio_tstamp_data;
173 s64 audio_tstamp_sec;
174 s64 audio_tstamp_nsec;
175 s64 driver_tstamp_sec;
176 s64 driver_tstamp_nsec;
177 u32 audio_tstamp_accuracy;
178 unsigned char reserved[52-4*sizeof(s64)];
179} __packed;
180
181static int snd_pcm_status_user_compat64(struct snd_pcm_substream *substream,
182 struct compat_snd_pcm_status64 __user *src,
183 bool ext)
184{
185 struct snd_pcm_status64 status;
186 struct compat_snd_pcm_status64 compat_status64;
187 int err;
188
189 memset(&status, 0, sizeof(status));
190 memset(&compat_status64, 0, sizeof(compat_status64));
191
192
193
194
195
196 if (ext && get_user(status.audio_tstamp_data,
197 (u32 __user *)(&src->audio_tstamp_data)))
198 return -EFAULT;
199 err = snd_pcm_status64(substream, &status);
200 if (err < 0)
201 return err;
202
203 if (clear_user(src, sizeof(*src)))
204 return -EFAULT;
205
206 compat_status64 = (struct compat_snd_pcm_status64) {
207 .state = status.state,
208 .trigger_tstamp_sec = status.trigger_tstamp_sec,
209 .trigger_tstamp_nsec = status.trigger_tstamp_nsec,
210 .tstamp_sec = status.tstamp_sec,
211 .tstamp_nsec = status.tstamp_nsec,
212 .appl_ptr = status.appl_ptr,
213 .hw_ptr = status.hw_ptr,
214 .delay = status.delay,
215 .avail = status.avail,
216 .avail_max = status.avail_max,
217 .overrange = status.overrange,
218 .suspended_state = status.suspended_state,
219 .audio_tstamp_data = status.audio_tstamp_data,
220 .audio_tstamp_sec = status.audio_tstamp_sec,
221 .audio_tstamp_nsec = status.audio_tstamp_nsec,
222 .driver_tstamp_sec = status.audio_tstamp_sec,
223 .driver_tstamp_nsec = status.audio_tstamp_nsec,
224 .audio_tstamp_accuracy = status.audio_tstamp_accuracy,
225 };
226
227 if (copy_to_user(src, &compat_status64, sizeof(compat_status64)))
228 return -EFAULT;
229
230 return err;
231}
232
233
234static int snd_pcm_ioctl_hw_params_compat(struct snd_pcm_substream *substream,
235 int refine,
236 struct snd_pcm_hw_params32 __user *data32)
237{
238 struct snd_pcm_hw_params *data;
239 struct snd_pcm_runtime *runtime;
240 int err;
241
242 if (! (runtime = substream->runtime))
243 return -ENOTTY;
244
245 data = kmalloc(sizeof(*data), GFP_KERNEL);
246 if (!data)
247 return -ENOMEM;
248
249
250 if (copy_from_user(data, data32, sizeof(*data32))) {
251 err = -EFAULT;
252 goto error;
253 }
254
255 if (refine)
256 err = snd_pcm_hw_refine(substream, data);
257 else
258 err = snd_pcm_hw_params(substream, data);
259 if (err < 0)
260 goto error;
261 if (copy_to_user(data32, data, sizeof(*data32)) ||
262 put_user(data->fifo_size, &data32->fifo_size)) {
263 err = -EFAULT;
264 goto error;
265 }
266
267 if (! refine) {
268 unsigned int new_boundary = recalculate_boundary(runtime);
269 if (new_boundary)
270 runtime->boundary = new_boundary;
271 }
272 error:
273 kfree(data);
274 return err;
275}
276
277
278
279
280struct snd_xferi32 {
281 s32 result;
282 u32 buf;
283 u32 frames;
284};
285
286static int snd_pcm_ioctl_xferi_compat(struct snd_pcm_substream *substream,
287 int dir, struct snd_xferi32 __user *data32)
288{
289 compat_caddr_t buf;
290 u32 frames;
291 int err;
292
293 if (! substream->runtime)
294 return -ENOTTY;
295 if (substream->stream != dir)
296 return -EINVAL;
297 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN)
298 return -EBADFD;
299
300 if (get_user(buf, &data32->buf) ||
301 get_user(frames, &data32->frames))
302 return -EFAULT;
303
304 if (dir == SNDRV_PCM_STREAM_PLAYBACK)
305 err = snd_pcm_lib_write(substream, compat_ptr(buf), frames);
306 else
307 err = snd_pcm_lib_read(substream, compat_ptr(buf), frames);
308 if (err < 0)
309 return err;
310
311 if (put_user(err, &data32->result))
312 return -EFAULT;
313 return 0;
314}
315
316
317
318struct snd_xfern32 {
319 s32 result;
320 u32 bufs;
321 u32 frames;
322};
323
324
325
326
327
328
329
330static int snd_pcm_ioctl_xfern_compat(struct snd_pcm_substream *substream,
331 int dir, struct snd_xfern32 __user *data32)
332{
333 compat_caddr_t buf;
334 compat_caddr_t __user *bufptr;
335 u32 frames;
336 void __user **bufs;
337 int err, ch, i;
338
339 if (! substream->runtime)
340 return -ENOTTY;
341 if (substream->stream != dir)
342 return -EINVAL;
343 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN)
344 return -EBADFD;
345
346 if ((ch = substream->runtime->channels) > 128)
347 return -EINVAL;
348 if (get_user(buf, &data32->bufs) ||
349 get_user(frames, &data32->frames))
350 return -EFAULT;
351 bufptr = compat_ptr(buf);
352 bufs = kmalloc_array(ch, sizeof(void __user *), GFP_KERNEL);
353 if (bufs == NULL)
354 return -ENOMEM;
355 for (i = 0; i < ch; i++) {
356 u32 ptr;
357 if (get_user(ptr, bufptr)) {
358 kfree(bufs);
359 return -EFAULT;
360 }
361 bufs[i] = compat_ptr(ptr);
362 bufptr++;
363 }
364 if (dir == SNDRV_PCM_STREAM_PLAYBACK)
365 err = snd_pcm_lib_writev(substream, bufs, frames);
366 else
367 err = snd_pcm_lib_readv(substream, bufs, frames);
368 if (err >= 0) {
369 if (put_user(err, &data32->result))
370 err = -EFAULT;
371 }
372 kfree(bufs);
373 return err;
374}
375
376#ifdef CONFIG_X86_X32
377
378struct snd_pcm_mmap_status_x32 {
379 snd_pcm_state_t state;
380 s32 pad1;
381 u32 hw_ptr;
382 u32 pad2;
383 s64 tstamp_sec;
384 s64 tstamp_nsec;
385 snd_pcm_state_t suspended_state;
386 s32 pad3;
387 s64 audio_tstamp_sec;
388 s64 audio_tstamp_nsec;
389} __packed;
390
391struct snd_pcm_mmap_control_x32 {
392 u32 appl_ptr;
393 u32 avail_min;
394};
395
396struct snd_pcm_sync_ptr_x32 {
397 u32 flags;
398 u32 rsvd;
399 union {
400 struct snd_pcm_mmap_status_x32 status;
401 unsigned char reserved[64];
402 } s;
403 union {
404 struct snd_pcm_mmap_control_x32 control;
405 unsigned char reserved[64];
406 } c;
407} __packed;
408
409static int snd_pcm_ioctl_sync_ptr_x32(struct snd_pcm_substream *substream,
410 struct snd_pcm_sync_ptr_x32 __user *src)
411{
412 struct snd_pcm_runtime *runtime = substream->runtime;
413 volatile struct snd_pcm_mmap_status *status;
414 volatile struct snd_pcm_mmap_control *control;
415 u32 sflags;
416 struct snd_pcm_mmap_control scontrol;
417 struct snd_pcm_mmap_status sstatus;
418 snd_pcm_uframes_t boundary;
419 int err;
420
421 if (snd_BUG_ON(!runtime))
422 return -EINVAL;
423
424 if (get_user(sflags, &src->flags) ||
425 get_user(scontrol.appl_ptr, &src->c.control.appl_ptr) ||
426 get_user(scontrol.avail_min, &src->c.control.avail_min))
427 return -EFAULT;
428 if (sflags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
429 err = snd_pcm_hwsync(substream);
430 if (err < 0)
431 return err;
432 }
433 status = runtime->status;
434 control = runtime->control;
435 boundary = recalculate_boundary(runtime);
436 if (!boundary)
437 boundary = 0x7fffffff;
438 snd_pcm_stream_lock_irq(substream);
439
440 if (!(sflags & SNDRV_PCM_SYNC_PTR_APPL))
441 control->appl_ptr = scontrol.appl_ptr;
442 else
443 scontrol.appl_ptr = control->appl_ptr % boundary;
444 if (!(sflags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
445 control->avail_min = scontrol.avail_min;
446 else
447 scontrol.avail_min = control->avail_min;
448 sstatus.state = status->state;
449 sstatus.hw_ptr = status->hw_ptr % boundary;
450 sstatus.tstamp = status->tstamp;
451 sstatus.suspended_state = status->suspended_state;
452 sstatus.audio_tstamp = status->audio_tstamp;
453 snd_pcm_stream_unlock_irq(substream);
454 if (put_user(sstatus.state, &src->s.status.state) ||
455 put_user(sstatus.hw_ptr, &src->s.status.hw_ptr) ||
456 put_user(sstatus.tstamp.tv_sec, &src->s.status.tstamp_sec) ||
457 put_user(sstatus.tstamp.tv_nsec, &src->s.status.tstamp_nsec) ||
458 put_user(sstatus.suspended_state, &src->s.status.suspended_state) ||
459 put_user(sstatus.audio_tstamp.tv_sec, &src->s.status.audio_tstamp_sec) ||
460 put_user(sstatus.audio_tstamp.tv_nsec, &src->s.status.audio_tstamp_nsec) ||
461 put_user(scontrol.appl_ptr, &src->c.control.appl_ptr) ||
462 put_user(scontrol.avail_min, &src->c.control.avail_min))
463 return -EFAULT;
464
465 return 0;
466}
467#endif
468
469
470
471enum {
472 SNDRV_PCM_IOCTL_HW_REFINE32 = _IOWR('A', 0x10, struct snd_pcm_hw_params32),
473 SNDRV_PCM_IOCTL_HW_PARAMS32 = _IOWR('A', 0x11, struct snd_pcm_hw_params32),
474 SNDRV_PCM_IOCTL_SW_PARAMS32 = _IOWR('A', 0x13, struct snd_pcm_sw_params32),
475 SNDRV_PCM_IOCTL_STATUS_COMPAT32 = _IOR('A', 0x20, struct snd_pcm_status32),
476 SNDRV_PCM_IOCTL_STATUS_EXT_COMPAT32 = _IOWR('A', 0x24, struct snd_pcm_status32),
477 SNDRV_PCM_IOCTL_DELAY32 = _IOR('A', 0x21, s32),
478 SNDRV_PCM_IOCTL_CHANNEL_INFO32 = _IOR('A', 0x32, struct snd_pcm_channel_info32),
479 SNDRV_PCM_IOCTL_REWIND32 = _IOW('A', 0x46, u32),
480 SNDRV_PCM_IOCTL_FORWARD32 = _IOW('A', 0x49, u32),
481 SNDRV_PCM_IOCTL_WRITEI_FRAMES32 = _IOW('A', 0x50, struct snd_xferi32),
482 SNDRV_PCM_IOCTL_READI_FRAMES32 = _IOR('A', 0x51, struct snd_xferi32),
483 SNDRV_PCM_IOCTL_WRITEN_FRAMES32 = _IOW('A', 0x52, struct snd_xfern32),
484 SNDRV_PCM_IOCTL_READN_FRAMES32 = _IOR('A', 0x53, struct snd_xfern32),
485 SNDRV_PCM_IOCTL_STATUS_COMPAT64 = _IOR('A', 0x20, struct compat_snd_pcm_status64),
486 SNDRV_PCM_IOCTL_STATUS_EXT_COMPAT64 = _IOWR('A', 0x24, struct compat_snd_pcm_status64),
487#ifdef CONFIG_X86_X32
488 SNDRV_PCM_IOCTL_CHANNEL_INFO_X32 = _IOR('A', 0x32, struct snd_pcm_channel_info),
489 SNDRV_PCM_IOCTL_SYNC_PTR_X32 = _IOWR('A', 0x23, struct snd_pcm_sync_ptr_x32),
490#endif
491};
492
493static long snd_pcm_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg)
494{
495 struct snd_pcm_file *pcm_file;
496 struct snd_pcm_substream *substream;
497 void __user *argp = compat_ptr(arg);
498
499 pcm_file = file->private_data;
500 if (! pcm_file)
501 return -ENOTTY;
502 substream = pcm_file->substream;
503 if (! substream)
504 return -ENOTTY;
505
506
507
508
509
510
511 pcm_file->no_compat_mmap = 1;
512
513 switch (cmd) {
514 case SNDRV_PCM_IOCTL_PVERSION:
515 case SNDRV_PCM_IOCTL_INFO:
516 case SNDRV_PCM_IOCTL_TSTAMP:
517 case SNDRV_PCM_IOCTL_TTSTAMP:
518 case SNDRV_PCM_IOCTL_USER_PVERSION:
519 case SNDRV_PCM_IOCTL_HWSYNC:
520 case SNDRV_PCM_IOCTL_PREPARE:
521 case SNDRV_PCM_IOCTL_RESET:
522 case SNDRV_PCM_IOCTL_START:
523 case SNDRV_PCM_IOCTL_DROP:
524 case SNDRV_PCM_IOCTL_DRAIN:
525 case SNDRV_PCM_IOCTL_PAUSE:
526 case SNDRV_PCM_IOCTL_HW_FREE:
527 case SNDRV_PCM_IOCTL_RESUME:
528 case SNDRV_PCM_IOCTL_XRUN:
529 case SNDRV_PCM_IOCTL_LINK:
530 case SNDRV_PCM_IOCTL_UNLINK:
531 case __SNDRV_PCM_IOCTL_SYNC_PTR32:
532 return snd_pcm_common_ioctl(file, substream, cmd, argp);
533 case __SNDRV_PCM_IOCTL_SYNC_PTR64:
534#ifdef CONFIG_X86_X32
535 if (in_x32_syscall())
536 return snd_pcm_ioctl_sync_ptr_x32(substream, argp);
537#endif
538 return snd_pcm_common_ioctl(file, substream, cmd, argp);
539 case SNDRV_PCM_IOCTL_HW_REFINE32:
540 return snd_pcm_ioctl_hw_params_compat(substream, 1, argp);
541 case SNDRV_PCM_IOCTL_HW_PARAMS32:
542 return snd_pcm_ioctl_hw_params_compat(substream, 0, argp);
543 case SNDRV_PCM_IOCTL_SW_PARAMS32:
544 return snd_pcm_ioctl_sw_params_compat(substream, argp);
545 case SNDRV_PCM_IOCTL_STATUS_COMPAT32:
546 return snd_pcm_status_user32(substream, argp, false);
547 case SNDRV_PCM_IOCTL_STATUS_EXT_COMPAT32:
548 return snd_pcm_status_user32(substream, argp, true);
549 case SNDRV_PCM_IOCTL_CHANNEL_INFO32:
550 return snd_pcm_ioctl_channel_info_compat(substream, argp);
551 case SNDRV_PCM_IOCTL_WRITEI_FRAMES32:
552 return snd_pcm_ioctl_xferi_compat(substream, SNDRV_PCM_STREAM_PLAYBACK, argp);
553 case SNDRV_PCM_IOCTL_READI_FRAMES32:
554 return snd_pcm_ioctl_xferi_compat(substream, SNDRV_PCM_STREAM_CAPTURE, argp);
555 case SNDRV_PCM_IOCTL_WRITEN_FRAMES32:
556 return snd_pcm_ioctl_xfern_compat(substream, SNDRV_PCM_STREAM_PLAYBACK, argp);
557 case SNDRV_PCM_IOCTL_READN_FRAMES32:
558 return snd_pcm_ioctl_xfern_compat(substream, SNDRV_PCM_STREAM_CAPTURE, argp);
559 case SNDRV_PCM_IOCTL_DELAY32:
560 return snd_pcm_ioctl_delay_compat(substream, argp);
561 case SNDRV_PCM_IOCTL_REWIND32:
562 return snd_pcm_ioctl_rewind_compat(substream, argp);
563 case SNDRV_PCM_IOCTL_FORWARD32:
564 return snd_pcm_ioctl_forward_compat(substream, argp);
565 case SNDRV_PCM_IOCTL_STATUS_COMPAT64:
566 return snd_pcm_status_user_compat64(substream, argp, false);
567 case SNDRV_PCM_IOCTL_STATUS_EXT_COMPAT64:
568 return snd_pcm_status_user_compat64(substream, argp, true);
569#ifdef CONFIG_X86_X32
570 case SNDRV_PCM_IOCTL_CHANNEL_INFO_X32:
571 return snd_pcm_ioctl_channel_info_x32(substream, argp);
572#endif
573 }
574
575 return -ENOIOCTLCMD;
576}
577
