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-rw-r--r--sound/core/pcm_compat.c513
1 files changed, 513 insertions, 0 deletions
diff --git a/sound/core/pcm_compat.c b/sound/core/pcm_compat.c
new file mode 100644
index 000000000000..3920bf0eebbf
--- /dev/null
+++ b/sound/core/pcm_compat.c
@@ -0,0 +1,513 @@
1/*
2 * 32bit -> 64bit ioctl wrapper for PCM API
3 * Copyright (c) by Takashi Iwai <tiwai@suse.de>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 *
19 */
20
21/* This file included from pcm_native.c */
22
23#include <linux/compat.h>
24
25static int snd_pcm_ioctl_delay_compat(snd_pcm_substream_t *substream,
26 s32 __user *src)
27{
28 snd_pcm_sframes_t delay;
29 mm_segment_t fs;
30 int err;
31
32 fs = snd_enter_user();
33 err = snd_pcm_delay(substream, &delay);
34 snd_leave_user(fs);
35 if (err < 0)
36 return err;
37 if (put_user(delay, src))
38 return -EFAULT;
39 return err;
40}
41
42static int snd_pcm_ioctl_rewind_compat(snd_pcm_substream_t *substream,
43 u32 __user *src)
44{
45 snd_pcm_uframes_t frames;
46 int err;
47
48 if (get_user(frames, src))
49 return -EFAULT;
50 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
51 err = snd_pcm_playback_rewind(substream, frames);
52 else
53 err = snd_pcm_capture_rewind(substream, frames);
54 if (put_user(err, src))
55 return -EFAULT;
56 return err < 0 ? err : 0;
57}
58
59static int snd_pcm_ioctl_forward_compat(snd_pcm_substream_t *substream,
60 u32 __user *src)
61{
62 snd_pcm_uframes_t frames;
63 int err;
64
65 if (get_user(frames, src))
66 return -EFAULT;
67 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
68 err = snd_pcm_playback_forward(substream, frames);
69 else
70 err = snd_pcm_capture_forward(substream, frames);
71 if (put_user(err, src))
72 return -EFAULT;
73 return err < 0 ? err : 0;
74}
75
76struct sndrv_pcm_hw_params32 {
77 u32 flags;
78 struct sndrv_mask masks[SNDRV_PCM_HW_PARAM_LAST_MASK - SNDRV_PCM_HW_PARAM_FIRST_MASK + 1]; /* this must be identical */
79 struct sndrv_mask mres[5]; /* reserved masks */
80 struct sndrv_interval intervals[SNDRV_PCM_HW_PARAM_LAST_INTERVAL - SNDRV_PCM_HW_PARAM_FIRST_INTERVAL + 1];
81 struct sndrv_interval ires[9]; /* reserved intervals */
82 u32 rmask;
83 u32 cmask;
84 u32 info;
85 u32 msbits;
86 u32 rate_num;
87 u32 rate_den;
88 u32 fifo_size;
89 unsigned char reserved[64];
90};
91
92struct sndrv_pcm_sw_params32 {
93 s32 tstamp_mode;
94 u32 period_step;
95 u32 sleep_min;
96 u32 avail_min;
97 u32 xfer_align;
98 u32 start_threshold;
99 u32 stop_threshold;
100 u32 silence_threshold;
101 u32 silence_size;
102 u32 boundary;
103 unsigned char reserved[64];
104};
105
106static int snd_pcm_ioctl_sw_params_compat(snd_pcm_substream_t *substream,
107 struct sndrv_pcm_sw_params32 __user *src)
108{
109 snd_pcm_sw_params_t params;
110 int err;
111
112 memset(&params, 0, sizeof(params));
113 if (get_user(params.tstamp_mode, &src->tstamp_mode) ||
114 get_user(params.period_step, &src->period_step) ||
115 get_user(params.sleep_min, &src->sleep_min) ||
116 get_user(params.avail_min, &src->avail_min) ||
117 get_user(params.xfer_align, &src->xfer_align) ||
118 get_user(params.start_threshold, &src->start_threshold) ||
119 get_user(params.stop_threshold, &src->stop_threshold) ||
120 get_user(params.silence_threshold, &src->silence_threshold) ||
121 get_user(params.silence_size, &src->silence_size))
122 return -EFAULT;
123 err = snd_pcm_sw_params(substream, &params);
124 if (err < 0)
125 return err;
126 if (put_user(params.boundary, &src->boundary))
127 return -EFAULT;
128 return err;
129}
130
131struct sndrv_pcm_channel_info32 {
132 u32 channel;
133 u32 offset;
134 u32 first;
135 u32 step;
136};
137
138static int snd_pcm_ioctl_channel_info_compat(snd_pcm_substream_t *substream,
139 struct sndrv_pcm_channel_info32 __user *src)
140{
141 snd_pcm_channel_info_t info;
142 int err;
143
144 if (get_user(info.channel, &src->channel) ||
145 get_user(info.offset, &src->offset) ||
146 get_user(info.first, &src->first) ||
147 get_user(info.step, &src->step))
148 return -EFAULT;
149 err = snd_pcm_channel_info(substream, &info);
150 if (err < 0)
151 return err;
152 if (put_user(info.channel, &src->channel) ||
153 put_user(info.offset, &src->offset) ||
154 put_user(info.first, &src->first) ||
155 put_user(info.step, &src->step))
156 return -EFAULT;
157 return err;
158}
159
160struct sndrv_pcm_status32 {
161 s32 state;
162 struct compat_timespec trigger_tstamp;
163 struct compat_timespec tstamp;
164 u32 appl_ptr;
165 u32 hw_ptr;
166 s32 delay;
167 u32 avail;
168 u32 avail_max;
169 u32 overrange;
170 s32 suspended_state;
171 unsigned char reserved[60];
172} __attribute__((packed));
173
174
175static int snd_pcm_status_user_compat(snd_pcm_substream_t *substream,
176 struct sndrv_pcm_status32 __user *src)
177{
178 snd_pcm_status_t status;
179 int err;
180
181 err = snd_pcm_status(substream, &status);
182 if (err < 0)
183 return err;
184
185 if (put_user(status.state, &src->state) ||
186 put_user(status.trigger_tstamp.tv_sec, &src->trigger_tstamp.tv_sec) ||
187 put_user(status.trigger_tstamp.tv_nsec, &src->trigger_tstamp.tv_nsec) ||
188 put_user(status.tstamp.tv_sec, &src->tstamp.tv_sec) ||
189 put_user(status.tstamp.tv_nsec, &src->tstamp.tv_nsec) ||
190 put_user(status.appl_ptr, &src->appl_ptr) ||
191 put_user(status.hw_ptr, &src->hw_ptr) ||
192 put_user(status.delay, &src->delay) ||
193 put_user(status.avail, &src->avail) ||
194 put_user(status.avail_max, &src->avail_max) ||
195 put_user(status.overrange, &src->overrange) ||
196 put_user(status.suspended_state, &src->suspended_state))
197 return -EFAULT;
198
199 return err;
200}
201
202/* recalcuate the boundary within 32bit */
203static void recalculate_boundary(snd_pcm_runtime_t *runtime)
204{
205 if (! runtime->buffer_size)
206 return;
207 runtime->boundary = runtime->buffer_size;
208 while (runtime->boundary * 2 <= 0x7fffffffUL - runtime->buffer_size)
209 runtime->boundary *= 2;
210}
211
212/* both for HW_PARAMS and HW_REFINE */
213static int snd_pcm_ioctl_hw_params_compat(snd_pcm_substream_t *substream,
214 int refine,
215 struct sndrv_pcm_hw_params32 __user *data32)
216{
217 struct sndrv_pcm_hw_params *data;
218 snd_pcm_runtime_t *runtime;
219 int err;
220
221 if (! (runtime = substream->runtime))
222 return -ENOTTY;
223
224 data = kmalloc(sizeof(*data), GFP_KERNEL);
225 if (data == NULL)
226 return -ENOMEM;
227 /* only fifo_size is different, so just copy all */
228 if (copy_from_user(data, data32, sizeof(*data32))) {
229 err = -EFAULT;
230 goto error;
231 }
232 if (refine)
233 err = snd_pcm_hw_refine(substream, data);
234 else
235 err = snd_pcm_hw_params(substream, data);
236 if (err < 0)
237 goto error;
238 if (copy_to_user(data32, data, sizeof(*data32)) ||
239 put_user(data->fifo_size, &data32->fifo_size)) {
240 err = -EFAULT;
241 goto error;
242 }
243
244 if (! refine)
245 recalculate_boundary(runtime);
246 error:
247 kfree(data);
248 return err;
249}
250
251
252/*
253 */
254struct sndrv_xferi32 {
255 s32 result;
256 u32 buf;
257 u32 frames;
258};
259
260static int snd_pcm_ioctl_xferi_compat(snd_pcm_substream_t *substream,
261 int dir, struct sndrv_xferi32 __user *data32)
262{
263 compat_caddr_t buf;
264 u32 frames;
265 int err;
266
267 if (! substream->runtime)
268 return -ENOTTY;
269 if (substream->stream != dir)
270 return -EINVAL;
271 if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN)
272 return -EBADFD;
273
274 if (get_user(buf, &data32->buf) ||
275 get_user(frames, &data32->frames))
276 return -EFAULT;
277
278 if (dir == SNDRV_PCM_STREAM_PLAYBACK)
279 err = snd_pcm_lib_write(substream, compat_ptr(buf), frames);
280 else
281 err = snd_pcm_lib_read(substream, compat_ptr(buf), frames);
282 if (err < 0)
283 return err;
284 /* copy the result */
285 if (put_user(err, &data32->result))
286 return -EFAULT;
287 return 0;
288}
289
290
291/* snd_xfern needs remapping of bufs */
292struct sndrv_xfern32 {
293 s32 result;
294 u32 bufs; /* this is void **; */
295 u32 frames;
296};
297
298/*
299 * xfern ioctl nees to copy (up to) 128 pointers on stack.
300 * although we may pass the copied pointers through f_op->ioctl, but the ioctl
301 * handler there expands again the same 128 pointers on stack, so it is better
302 * to handle the function (calling pcm_readv/writev) directly in this handler.
303 */
304static int snd_pcm_ioctl_xfern_compat(snd_pcm_substream_t *substream,
305 int dir, struct sndrv_xfern32 __user *data32)
306{
307 compat_caddr_t buf;
308 compat_caddr_t __user *bufptr;
309 u32 frames;
310 void __user **bufs;
311 int err, ch, i;
312
313 if (! substream->runtime)
314 return -ENOTTY;
315 if (substream->stream != dir)
316 return -EINVAL;
317
318 if ((ch = substream->runtime->channels) > 128)
319 return -EINVAL;
320 if (get_user(buf, &data32->bufs) ||
321 get_user(frames, &data32->frames))
322 return -EFAULT;
323 bufptr = compat_ptr(buf);
324 bufs = kmalloc(sizeof(void __user *) * ch, GFP_KERNEL);
325 if (bufs == NULL)
326 return -ENOMEM;
327 for (i = 0; i < ch; i++) {
328 u32 ptr;
329 if (get_user(ptr, bufptr)) {
330 kfree(bufs);
331 return -EFAULT;
332 }
333 bufs[ch] = compat_ptr(ptr);
334 bufptr++;
335 }
336 if (dir == SNDRV_PCM_STREAM_PLAYBACK)
337 err = snd_pcm_lib_writev(substream, bufs, frames);
338 else
339 err = snd_pcm_lib_readv(substream, bufs, frames);
340 if (err >= 0) {
341 if (put_user(err, &data32->result))
342 err = -EFAULT;
343 }
344 kfree(bufs);
345 return err;
346}
347
348
349struct sndrv_pcm_mmap_status32 {
350 s32 state;
351 s32 pad1;
352 u32 hw_ptr;
353 struct compat_timespec tstamp;
354 s32 suspended_state;
355} __attribute__((packed));
356
357struct sndrv_pcm_mmap_control32 {
358 u32 appl_ptr;
359 u32 avail_min;
360};
361
362struct sndrv_pcm_sync_ptr32 {
363 u32 flags;
364 union {
365 struct sndrv_pcm_mmap_status32 status;
366 unsigned char reserved[64];
367 } s;
368 union {
369 struct sndrv_pcm_mmap_control32 control;
370 unsigned char reserved[64];
371 } c;
372} __attribute__((packed));
373
374static int snd_pcm_ioctl_sync_ptr_compat(snd_pcm_substream_t *substream,
375 struct sndrv_pcm_sync_ptr32 __user *src)
376{
377 snd_pcm_runtime_t *runtime = substream->runtime;
378 volatile struct sndrv_pcm_mmap_status *status;
379 volatile struct sndrv_pcm_mmap_control *control;
380 u32 sflags;
381 struct sndrv_pcm_mmap_control scontrol;
382 struct sndrv_pcm_mmap_status sstatus;
383 int err;
384
385 snd_assert(runtime, return -EINVAL);
386
387 if (get_user(sflags, &src->flags) ||
388 get_user(scontrol.appl_ptr, &src->c.control.appl_ptr) ||
389 get_user(scontrol.avail_min, &src->c.control.avail_min))
390 return -EFAULT;
391 if (sflags & SNDRV_PCM_SYNC_PTR_HWSYNC) {
392 err = snd_pcm_hwsync(substream);
393 if (err < 0)
394 return err;
395 }
396 status = runtime->status;
397 control = runtime->control;
398 snd_pcm_stream_lock_irq(substream);
399 if (!(sflags & SNDRV_PCM_SYNC_PTR_APPL))
400 control->appl_ptr = scontrol.appl_ptr;
401 else
402 scontrol.appl_ptr = control->appl_ptr;
403 if (!(sflags & SNDRV_PCM_SYNC_PTR_AVAIL_MIN))
404 control->avail_min = scontrol.avail_min;
405 else
406 scontrol.avail_min = control->avail_min;
407 sstatus.state = status->state;
408 sstatus.hw_ptr = status->hw_ptr;
409 sstatus.tstamp = status->tstamp;
410 sstatus.suspended_state = status->suspended_state;
411 snd_pcm_stream_unlock_irq(substream);
412 if (put_user(sstatus.state, &src->s.status.state) ||
413 put_user(sstatus.hw_ptr, &src->s.status.hw_ptr) ||
414 put_user(sstatus.tstamp.tv_sec, &src->s.status.tstamp.tv_sec) ||
415 put_user(sstatus.tstamp.tv_nsec, &src->s.status.tstamp.tv_nsec) ||
416 put_user(sstatus.suspended_state, &src->s.status.suspended_state) ||
417 put_user(scontrol.appl_ptr, &src->c.control.appl_ptr) ||
418 put_user(scontrol.avail_min, &src->c.control.avail_min))
419 return -EFAULT;
420
421 return 0;
422}
423
424
425/*
426 */
427enum {
428 SNDRV_PCM_IOCTL_HW_REFINE32 = _IOWR('A', 0x10, struct sndrv_pcm_hw_params32),
429 SNDRV_PCM_IOCTL_HW_PARAMS32 = _IOWR('A', 0x11, struct sndrv_pcm_hw_params32),
430 SNDRV_PCM_IOCTL_SW_PARAMS32 = _IOWR('A', 0x13, struct sndrv_pcm_sw_params32),
431 SNDRV_PCM_IOCTL_STATUS32 = _IOR('A', 0x20, struct sndrv_pcm_status32),
432 SNDRV_PCM_IOCTL_DELAY32 = _IOR('A', 0x21, s32),
433 SNDRV_PCM_IOCTL_CHANNEL_INFO32 = _IOR('A', 0x32, struct sndrv_pcm_channel_info32),
434 SNDRV_PCM_IOCTL_REWIND32 = _IOW('A', 0x46, u32),
435 SNDRV_PCM_IOCTL_FORWARD32 = _IOW('A', 0x49, u32),
436 SNDRV_PCM_IOCTL_WRITEI_FRAMES32 = _IOW('A', 0x50, struct sndrv_xferi32),
437 SNDRV_PCM_IOCTL_READI_FRAMES32 = _IOR('A', 0x51, struct sndrv_xferi32),
438 SNDRV_PCM_IOCTL_WRITEN_FRAMES32 = _IOW('A', 0x52, struct sndrv_xfern32),
439 SNDRV_PCM_IOCTL_READN_FRAMES32 = _IOR('A', 0x53, struct sndrv_xfern32),
440 SNDRV_PCM_IOCTL_SYNC_PTR32 = _IOWR('A', 0x23, struct sndrv_pcm_sync_ptr32),
441
442};
443
444static long snd_pcm_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg)
445{
446 snd_pcm_file_t *pcm_file;
447 snd_pcm_substream_t *substream;
448 void __user *argp = compat_ptr(arg);
449
450 pcm_file = file->private_data;
451 if (! pcm_file)
452 return -ENOTTY;
453 substream = pcm_file->substream;
454 if (! substream)
455 return -ENOTTY;
456
457 /*
458 * When PCM is used on 32bit mode, we need to disable
459 * mmap of PCM status/control records because of the size
460 * incompatibility.
461 */
462 substream->no_mmap_ctrl = 1;
463
464 switch (cmd) {
465 case SNDRV_PCM_IOCTL_PVERSION:
466 case SNDRV_PCM_IOCTL_INFO:
467 case SNDRV_PCM_IOCTL_TSTAMP:
468 case SNDRV_PCM_IOCTL_HWSYNC:
469 case SNDRV_PCM_IOCTL_PREPARE:
470 case SNDRV_PCM_IOCTL_RESET:
471 case SNDRV_PCM_IOCTL_START:
472 case SNDRV_PCM_IOCTL_DROP:
473 case SNDRV_PCM_IOCTL_DRAIN:
474 case SNDRV_PCM_IOCTL_PAUSE:
475 case SNDRV_PCM_IOCTL_HW_FREE:
476 case SNDRV_PCM_IOCTL_RESUME:
477 case SNDRV_PCM_IOCTL_XRUN:
478 case SNDRV_PCM_IOCTL_LINK:
479 case SNDRV_PCM_IOCTL_UNLINK:
480 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
481 return snd_pcm_playback_ioctl1(substream, cmd, argp);
482 else
483 return snd_pcm_capture_ioctl1(substream, cmd, argp);
484 case SNDRV_PCM_IOCTL_HW_REFINE32:
485 return snd_pcm_ioctl_hw_params_compat(substream, 1, argp);
486 case SNDRV_PCM_IOCTL_HW_PARAMS32:
487 return snd_pcm_ioctl_hw_params_compat(substream, 0, argp);
488 case SNDRV_PCM_IOCTL_SW_PARAMS32:
489 return snd_pcm_ioctl_sw_params_compat(substream, argp);
490 case SNDRV_PCM_IOCTL_STATUS32:
491 return snd_pcm_status_user_compat(substream, argp);
492 case SNDRV_PCM_IOCTL_SYNC_PTR32:
493 return snd_pcm_ioctl_sync_ptr_compat(substream, argp);
494 case SNDRV_PCM_IOCTL_CHANNEL_INFO32:
495 return snd_pcm_ioctl_channel_info_compat(substream, argp);
496 case SNDRV_PCM_IOCTL_WRITEI_FRAMES32:
497 return snd_pcm_ioctl_xferi_compat(substream, SNDRV_PCM_STREAM_PLAYBACK, argp);
498 case SNDRV_PCM_IOCTL_READI_FRAMES32:
499 return snd_pcm_ioctl_xferi_compat(substream, SNDRV_PCM_STREAM_CAPTURE, argp);
500 case SNDRV_PCM_IOCTL_WRITEN_FRAMES32:
501 return snd_pcm_ioctl_xfern_compat(substream, SNDRV_PCM_STREAM_PLAYBACK, argp);
502 case SNDRV_PCM_IOCTL_READN_FRAMES32:
503 return snd_pcm_ioctl_xfern_compat(substream, SNDRV_PCM_STREAM_CAPTURE, argp);
504 case SNDRV_PCM_IOCTL_DELAY32:
505 return snd_pcm_ioctl_delay_compat(substream, argp);
506 case SNDRV_PCM_IOCTL_REWIND32:
507 return snd_pcm_ioctl_rewind_compat(substream, argp);
508 case SNDRV_PCM_IOCTL_FORWARD32:
509 return snd_pcm_ioctl_forward_compat(substream, argp);
510 }
511
512 return -ENOIOCTLCMD;
513}
generated by cgit v1.2.2 (git 2.25.0) at 2025-09-20 15:12:55 -0400