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23#include <linux/compat.h>
24#include <linux/slab.h>
25
26static int snd_pcm_ioctl_delay_compat(struct snd_pcm_substream *substream,
27 s32 __user *src)
28{
29 snd_pcm_sframes_t delay;
30 mm_segment_t fs;
31 int err;
32
33 fs = snd_enter_user();
34 err = snd_pcm_delay(substream, &delay);
35 snd_leave_user(fs);
36 if (err < 0)
37 return err;
38 if (put_user(delay, src))
39 return -EFAULT;
40 return err;
41}
42
43static int snd_pcm_ioctl_rewind_compat(struct snd_pcm_substream *substream,
44 u32 __user *src)
45{
46 snd_pcm_uframes_t frames;
47 int err;
48
49 if (get_user(frames, src))
50 return -EFAULT;
51 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
52 err = snd_pcm_playback_rewind(substream, frames);
53 else
54 err = snd_pcm_capture_rewind(substream, frames);
55 if (put_user(err, src))
56 return -EFAULT;
57 return err < 0 ? err : 0;
58}
59
60static int snd_pcm_ioctl_forward_compat(struct snd_pcm_substream *substream,
61 u32 __user *src)
62{
63 snd_pcm_uframes_t frames;
64 int err;
65
66 if (get_user(frames, src))
67 return -EFAULT;
68 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
69 err = snd_pcm_playback_forward(substream, frames);
70 else
71 err = snd_pcm_capture_forward(substream, frames);
72 if (put_user(err, src))
73 return -EFAULT;
74 return err < 0 ? err : 0;
75}
76
77struct snd_pcm_hw_params32 {
78 u32 flags;
79 struct snd_mask masks[SNDRV_PCM_HW_PARAM_LAST_MASK - SNDRV_PCM_HW_PARAM_FIRST_MASK + 1];
80 struct snd_mask mres[5];
81 struct snd_interval intervals[SNDRV_PCM_HW_PARAM_LAST_INTERVAL - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL + 1];
82 struct snd_interval ires[9];
83 u32 rmask;
84 u32 cmask;
85 u32 info;
86 u32 msbits;
87 u32 rate_num;
88 u32 rate_den;
89 u32 fifo_size;
90 unsigned char reserved[64];
91};
92
93struct snd_pcm_sw_params32 {
94 s32 tstamp_mode;
95 u32 period_step;
96 u32 sleep_min;
97 u32 avail_min;
98 u32 xfer_align;
99 u32 start_threshold;
100 u32 stop_threshold;
101 u32 silence_threshold;
102 u32 silence_size;
103 u32 boundary;
104 u32 proto;
105 u32 tstamp_type;
106 unsigned char reserved[56];
107};
108
109
110static snd_pcm_uframes_t recalculate_boundary(struct snd_pcm_runtime *runtime)
111{
112 snd_pcm_uframes_t boundary;
113
114 if (! runtime->buffer_size)
115 return 0;
116 boundary = runtime->buffer_size;
117 while (boundary * 2 <= 0x7fffffffUL - runtime->buffer_size)
118 boundary *= 2;
119 return boundary;
120}
121
122static int snd_pcm_ioctl_sw_params_compat(struct snd_pcm_substream *substream,
123 struct snd_pcm_sw_params32 __user *src)
124{
125 struct snd_pcm_sw_params params;
126 snd_pcm_uframes_t boundary;
127 int err;
128
129 memset(¶ms, 0, sizeof(params));
130 if (get_user(params.tstamp_mode, &src->tstamp_mode) ||
131 get_user(params.period_step, &src->period_step) ||
132 get_user(params.sleep_min, &src->sleep_min) ||
133 get_user(params.avail_min, &src->avail_min) ||
134 get_user(params.xfer_align, &src->xfer_align) ||
135 get_user(params.start_threshold, &src->start_threshold) ||
136 get_user(params.stop_threshold, &src->stop_threshold) ||
137 get_user(params.silence_threshold, &src->silence_threshold) ||
138 get_user(params.silence_size, &src->silence_size) ||
139 get_user(params.tstamp_type, &src->tstamp_type) ||
140 get_user(params.proto, &src->proto))
141 return -EFAULT;
142
143
144
145
146 boundary = recalculate_boundary(substream->runtime);
147 if (boundary && params.silence_size >= boundary)
148 params.silence_size = substream->runtime->boundary;
149 err = snd_pcm_sw_params(substream, ¶ms);
150 if (err < 0)
151 return err;
152 if (boundary && put_user(boundary, &src->boundary))
153 return -EFAULT;
154 return err;
155}
156
157struct snd_pcm_channel_info32 {
158 u32 channel;
159 u32 offset;
160 u32 first;
161 u32 step;
162};
163
164static int snd_pcm_ioctl_channel_info_compat(struct snd_pcm_substream *substream,
165 struct snd_pcm_channel_info32 __user *src)
166{
167 struct snd_pcm_channel_info info;
168 int err;
169
170 if (get_user(info.channel, &src->channel) ||
171 get_user(info.offset, &src->offset) ||
172 get_user(info.first, &src->first) ||
173 get_user(info.step, &src->step))
174 return -EFAULT;
175 err = snd_pcm_channel_info(substream, &info);
176 if (err < 0)
177 return err;
178 if (put_user(info.channel, &src->channel) ||
179 put_user(info.offset, &src->offset) ||
180 put_user(info.first, &src->first) ||
181 put_user(info.step, &src->step))
182 return -EFAULT;
183 return err;
184}
185
186struct snd_pcm_status32 {
187 s32 state;
188 struct compat_timespec trigger_tstamp;
189 struct compat_timespec tstamp;
190 u32 appl_ptr;
191 u32 hw_ptr;
192 s32 delay;
193 u32 avail;
194 u32 avail_max;
195 u32 overrange;
196 s32 suspended_state;
197 u32 reserved_alignment;
198 struct compat_timespec audio_tstamp;
199 unsigned char reserved[56-sizeof(struct compat_timespec)];
200} __attribute__((packed));
201
202
203static int snd_pcm_status_user_compat(struct snd_pcm_substream *substream,
204 struct snd_pcm_status32 __user *src)
205{
206 struct snd_pcm_status status;
207 int err;
208
209 err = snd_pcm_status(substream, &status);
210 if (err < 0)
211 return err;
212
213 if (clear_user(src, sizeof(*src)))
214 return -EFAULT;
215 if (put_user(status.state, &src->state) ||
216 compat_put_timespec(&status.trigger_tstamp, &src->trigger_tstamp) ||
217 compat_put_timespec(&status.tstamp, &src->tstamp) ||
218 put_user(status.appl_ptr, &src->appl_ptr) ||
219 put_user(status.hw_ptr, &src->hw_ptr) ||
220 put_user(status.delay, &src->delay) ||
221 put_user(status.avail, &src->avail) ||
222 put_user(status.avail_max, &src->avail_max) ||
223 put_user(status.overrange, &src->overrange) ||
224 put_user(status.suspended_state, &src->suspended_state) ||
225 compat_put_timespec(&status.audio_tstamp, &src->audio_tstamp))
226 return -EFAULT;
227
228 return err;
229}
230
231
232static int snd_pcm_ioctl_hw_params_compat(struct snd_pcm_substream *substream,
233 int refine,
234 struct snd_pcm_hw_params32 __user *data32)
235{
236 struct snd_pcm_hw_params *data;
237 struct snd_pcm_runtime *runtime;
238 int err;
239
240 if (! (runtime = substream->runtime))
241 return -ENOTTY;
242
243
244 data = memdup_user(data32, sizeof(*data32));
245 if (IS_ERR(data))
246 return PTR_ERR(data);
247
248 if (refine)
249 err = snd_pcm_hw_refine(substream, data);
250 else
251 err = snd_pcm_hw_params(substream, data);
252 if (err < 0)
253 goto error;
254 if (copy_to_user(data32, data, sizeof(*data32)) ||
255 put_user(data->fifo_size, &data32->fifo_size)) {
256 err = -EFAULT;
257 goto error;
258 }
259
260 if (! refine) {
261 unsigned int new_boundary = recalculate_boundary(runtime);
262 if (new_boundary)
263 runtime->boundary = new_boundary;
264 }
265 error:
266 kfree(data);
267 return err;
268}
269
270
271
272
273struct snd_xferi32 {
274 s32 result;
275 u32 buf;
276 u32 frames;
277};
278
279static int snd_pcm_ioctl_xferi_compat(struct snd_pcm_substream *substream,
280 int dir, struct snd_xferi32 __user *data32)
281{
282 compat_caddr_t buf;
283 u32 frames;
284 int err;
285
286 if (! substream->runtime)
287 return -ENOTTY;
288 if (substream->stream != dir)
289 return -EINVAL;
290 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN)
291 return -EBADFD;
292
293 if (get_user(buf, &data32->buf) ||
294 get_user(frames, &data32->frames))
295 return -EFAULT;
296
297 if (dir == SNDRV_PCM_STREAM_PLAYBACK)
298 err = snd_pcm_lib_write(substream, compat_ptr(buf), frames);
299 else
300 err = snd_pcm_lib_read(substream, compat_ptr(buf), frames);
301 if (err < 0)
302 return err;
303
304 if (put_user(err, &data32->result))
305 return -EFAULT;
306 return 0;
307}
308
309
310
311struct snd_xfern32 {
312 s32 result;
313 u32 bufs;
314 u32 frames;
315};
316
317
318
319
320
321
322
323static int snd_pcm_ioctl_xfern_compat(struct snd_pcm_substream *substream,
324 int dir, struct snd_xfern32 __user *data32)
325{
326 compat_caddr_t buf;
327 compat_caddr_t __user *bufptr;
328 u32 frames;
329 void __user **bufs;
330 int err, ch, i;
331
332 if (! substream->runtime)
333 return -ENOTTY;
334 if (substream->stream != dir)
335 return -EINVAL;
336
337 if ((ch = substream->runtime->channels) > 128)
338 return -EINVAL;
339 if (get_user(buf, &data32->bufs) ||
340 get_user(frames, &data32->frames))
341 return -EFAULT;
342 bufptr = compat_ptr(buf);
343 bufs = kmalloc(sizeof(void __user *) * ch, GFP_KERNEL);
344 if (bufs == NULL)
345 return -ENOMEM;
346 for (i = 0; i < ch; i++) {
347 u32 ptr;
348 if (get_user(ptr, bufptr)) {
349 kfree(bufs);
350 return -EFAULT;
351 }
352 bufs[i] = compat_ptr(ptr);
353 bufptr++;
354 }
355 if (dir == SNDRV_PCM_STREAM_PLAYBACK)
356 err = snd_pcm_lib_writev(substream, bufs, frames);
357 else
358 err = snd_pcm_lib_readv(substream, bufs, frames);
359 if (err >= 0) {
360 if (put_user(err, &data32->result))
361 err = -EFAULT;
362 }
363 kfree(bufs);
364 return err;
365}
366
367
368struct snd_pcm_mmap_status32 {
369 s32 state;
370 s32 pad1;
371 u32 hw_ptr;
372 struct compat_timespec tstamp;
373 s32 suspended_state;
374 struct compat_timespec audio_tstamp;
375} __attribute__((packed));
376
377struct snd_pcm_mmap_control32 {
378 u32 appl_ptr;
379 u32 avail_min;
380};
381
382struct snd_pcm_sync_ptr32 {
383 u32 flags;
384 union {
385 struct snd_pcm_mmap_status32 status;
386 unsigned char reserved[64];
387 } s;
388 union {
389 struct snd_pcm_mmap_control32 control;
390 unsigned char reserved[64];
391 } c;
392} __attribute__((packed));
393
394static int snd_pcm_ioctl_sync_ptr_compat(struct snd_pcm_substream *substream,
395 struct snd_pcm_sync_ptr32 __user *src)
396{
397 struct snd_pcm_runtime *runtime = substream->runtime;
398 volatile struct snd_pcm_mmap_status *status;
399 volatile struct snd_pcm_mmap_control *control;
400 u32 sflags;
401 struct snd_pcm_mmap_control scontrol;
402 struct snd_pcm_mmap_status sstatus;
403 snd_pcm_uframes_t boundary;
404 int err;
405
406 if (snd_BUG_ON(!runtime))
407 return -EINVAL;
408
409 if (get_user(sflags, &src->flags) ||
410 get_user(scontrol.appl_ptr, &src->c.control.appl_ptr) ||
411 get_user(scontrol.avail_min, &src->c.control.avail_min))
412 return -EFAULT;
413 if (sflags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
414 err = snd_pcm_hwsync(substream);
415 if (err < 0)
416 return err;
417 }
418 status = runtime->status;
419 control = runtime->control;
420 boundary = recalculate_boundary(runtime);
421 if (! boundary)
422 boundary = 0x7fffffff;
423 snd_pcm_stream_lock_irq(substream);
424
425 if (!(sflags & SNDRV_PCM_SYNC_PTR_APPL))
426 control->appl_ptr = scontrol.appl_ptr;
427 else
428 scontrol.appl_ptr = control->appl_ptr % boundary;
429 if (!(sflags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
430 control->avail_min = scontrol.avail_min;
431 else
432 scontrol.avail_min = control->avail_min;
433 sstatus.state = status->state;
434 sstatus.hw_ptr = status->hw_ptr % boundary;
435 sstatus.tstamp = status->tstamp;
436 sstatus.suspended_state = status->suspended_state;
437 sstatus.audio_tstamp = status->audio_tstamp;
438 snd_pcm_stream_unlock_irq(substream);
439 if (put_user(sstatus.state, &src->s.status.state) ||
440 put_user(sstatus.hw_ptr, &src->s.status.hw_ptr) ||
441 compat_put_timespec(&sstatus.tstamp, &src->s.status.tstamp) ||
442 put_user(sstatus.suspended_state, &src->s.status.suspended_state) ||
443 compat_put_timespec(&sstatus.audio_tstamp,
444 &src->s.status.audio_tstamp) ||
445 put_user(scontrol.appl_ptr, &src->c.control.appl_ptr) ||
446 put_user(scontrol.avail_min, &src->c.control.avail_min))
447 return -EFAULT;
448
449 return 0;
450}
451
452
453
454
455enum {
456 SNDRV_PCM_IOCTL_HW_REFINE32 = _IOWR('A', 0x10, struct snd_pcm_hw_params32),
457 SNDRV_PCM_IOCTL_HW_PARAMS32 = _IOWR('A', 0x11, struct snd_pcm_hw_params32),
458 SNDRV_PCM_IOCTL_SW_PARAMS32 = _IOWR('A', 0x13, struct snd_pcm_sw_params32),
459 SNDRV_PCM_IOCTL_STATUS32 = _IOR('A', 0x20, struct snd_pcm_status32),
460 SNDRV_PCM_IOCTL_DELAY32 = _IOR('A', 0x21, s32),
461 SNDRV_PCM_IOCTL_CHANNEL_INFO32 = _IOR('A', 0x32, struct snd_pcm_channel_info32),
462 SNDRV_PCM_IOCTL_REWIND32 = _IOW('A', 0x46, u32),
463 SNDRV_PCM_IOCTL_FORWARD32 = _IOW('A', 0x49, u32),
464 SNDRV_PCM_IOCTL_WRITEI_FRAMES32 = _IOW('A', 0x50, struct snd_xferi32),
465 SNDRV_PCM_IOCTL_READI_FRAMES32 = _IOR('A', 0x51, struct snd_xferi32),
466 SNDRV_PCM_IOCTL_WRITEN_FRAMES32 = _IOW('A', 0x52, struct snd_xfern32),
467 SNDRV_PCM_IOCTL_READN_FRAMES32 = _IOR('A', 0x53, struct snd_xfern32),
468 SNDRV_PCM_IOCTL_SYNC_PTR32 = _IOWR('A', 0x23, struct snd_pcm_sync_ptr32),
469
470};
471
472static long snd_pcm_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg)
473{
474 struct snd_pcm_file *pcm_file;
475 struct snd_pcm_substream *substream;
476 void __user *argp = compat_ptr(arg);
477
478 pcm_file = file->private_data;
479 if (! pcm_file)
480 return -ENOTTY;
481 substream = pcm_file->substream;
482 if (! substream)
483 return -ENOTTY;
484
485
486
487
488
489
490 pcm_file->no_compat_mmap = 1;
491
492 switch (cmd) {
493 case SNDRV_PCM_IOCTL_PVERSION:
494 case SNDRV_PCM_IOCTL_INFO:
495 case SNDRV_PCM_IOCTL_TSTAMP:
496 case SNDRV_PCM_IOCTL_TTSTAMP:
497 case SNDRV_PCM_IOCTL_HWSYNC:
498 case SNDRV_PCM_IOCTL_PREPARE:
499 case SNDRV_PCM_IOCTL_RESET:
500 case SNDRV_PCM_IOCTL_START:
501 case SNDRV_PCM_IOCTL_DROP:
502 case SNDRV_PCM_IOCTL_DRAIN:
503 case SNDRV_PCM_IOCTL_PAUSE:
504 case SNDRV_PCM_IOCTL_HW_FREE:
505 case SNDRV_PCM_IOCTL_RESUME:
506 case SNDRV_PCM_IOCTL_XRUN:
507 case SNDRV_PCM_IOCTL_LINK:
508 case SNDRV_PCM_IOCTL_UNLINK:
509 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
510 return snd_pcm_playback_ioctl1(file, substream, cmd, argp);
511 else
512 return snd_pcm_capture_ioctl1(file, substream, cmd, argp);
513 case SNDRV_PCM_IOCTL_HW_REFINE32:
514 return snd_pcm_ioctl_hw_params_compat(substream, 1, argp);
515 case SNDRV_PCM_IOCTL_HW_PARAMS32:
516 return snd_pcm_ioctl_hw_params_compat(substream, 0, argp);
517 case SNDRV_PCM_IOCTL_SW_PARAMS32:
518 return snd_pcm_ioctl_sw_params_compat(substream, argp);
519 case SNDRV_PCM_IOCTL_STATUS32:
520 return snd_pcm_status_user_compat(substream, argp);
521 case SNDRV_PCM_IOCTL_SYNC_PTR32:
522 return snd_pcm_ioctl_sync_ptr_compat(substream, argp);
523 case SNDRV_PCM_IOCTL_CHANNEL_INFO32:
524 return snd_pcm_ioctl_channel_info_compat(substream, argp);
525 case SNDRV_PCM_IOCTL_WRITEI_FRAMES32:
526 return snd_pcm_ioctl_xferi_compat(substream, SNDRV_PCM_STREAM_PLAYBACK, argp);
527 case SNDRV_PCM_IOCTL_READI_FRAMES32:
528 return snd_pcm_ioctl_xferi_compat(substream, SNDRV_PCM_STREAM_CAPTURE, argp);
529 case SNDRV_PCM_IOCTL_WRITEN_FRAMES32:
530 return snd_pcm_ioctl_xfern_compat(substream, SNDRV_PCM_STREAM_PLAYBACK, argp);
531 case SNDRV_PCM_IOCTL_READN_FRAMES32:
532 return snd_pcm_ioctl_xfern_compat(substream, SNDRV_PCM_STREAM_CAPTURE, argp);
533 case SNDRV_PCM_IOCTL_DELAY32:
534 return snd_pcm_ioctl_delay_compat(substream, argp);
535 case SNDRV_PCM_IOCTL_REWIND32:
536 return snd_pcm_ioctl_rewind_compat(substream, argp);
537 case SNDRV_PCM_IOCTL_FORWARD32:
538 return snd_pcm_ioctl_forward_compat(substream, argp);
539 }
540
541 return -ENOIOCTLCMD;
542}
543
