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1 /*
2  * Copyright (c) 2014 Philippe De Muyter <phdm@macqel.be>
3  * Copyright (c) 2014 William Manley <will@williammanley.net>
4  * Copyright (c) 2011 Peter Zotov <whitequark@whitequark.org>
5  * Copyright (c) 2014-2018 The strace developers.
6  * All rights reserved.
7  *
8  * Redistribution and use in source and binary forms, with or without
9  * modification, are permitted provided that the following conditions
10  * are met:
11  * 1. Redistributions of source code must retain the above copyright
12  *    notice, this list of conditions and the following disclaimer.
13  * 2. Redistributions in binary form must reproduce the above copyright
14  *    notice, this list of conditions and the following disclaimer in the
15  *    documentation and/or other materials provided with the distribution.
16  * 3. The name of the author may not be used to endorse or promote products
17  *    derived from this software without specific prior written permission.
18  *
19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
20  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
21  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
22  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
23  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
24  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
28  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29  */
30 
31 #include "defs.h"
32 
33 #include <stdint.h>
34 #include <linux/ioctl.h>
35 #include <linux/types.h>
36 #include <linux/videodev2.h>
37 
38 #include DEF_MPERS_TYPE(struct_v4l2_buffer)
39 #include DEF_MPERS_TYPE(struct_v4l2_clip)
40 #ifdef VIDIOC_CREATE_BUFS
41 # include DEF_MPERS_TYPE(struct_v4l2_create_buffers)
42 #endif
43 #include DEF_MPERS_TYPE(struct_v4l2_ext_control)
44 #include DEF_MPERS_TYPE(struct_v4l2_ext_controls)
45 #include DEF_MPERS_TYPE(struct_v4l2_format)
46 #include DEF_MPERS_TYPE(struct_v4l2_framebuffer)
47 #include DEF_MPERS_TYPE(struct_v4l2_input)
48 #include DEF_MPERS_TYPE(struct_v4l2_standard)
49 
50 typedef struct v4l2_buffer struct_v4l2_buffer;
51 typedef struct v4l2_clip struct_v4l2_clip;
52 #ifdef VIDIOC_CREATE_BUFS
53 typedef struct v4l2_create_buffers struct_v4l2_create_buffers;
54 #endif
55 typedef struct v4l2_ext_control struct_v4l2_ext_control;
56 typedef struct v4l2_ext_controls struct_v4l2_ext_controls;
57 typedef struct v4l2_format struct_v4l2_format;
58 typedef struct v4l2_framebuffer struct_v4l2_framebuffer;
59 typedef struct v4l2_input struct_v4l2_input;
60 typedef struct v4l2_standard struct_v4l2_standard;
61 
62 #include MPERS_DEFS
63 
64 #include "print_fields.h"
65 #include "xstring.h"
66 
67 /* v4l2_fourcc_be was added by Linux commit v3.18-rc1~101^2^2~127 */
68 #ifndef v4l2_fourcc_be
69 # define v4l2_fourcc_be(a, b, c, d) (v4l2_fourcc(a, b, c, d) | (1 << 31))
70 #endif
71 
72 #define FMT_FRACT "%u/%u"
73 #define ARGS_FRACT(x) ((x).numerator), ((x).denominator)
74 
75 #define FMT_RECT "{left=%d, top=%d, width=%u, height=%u}"
76 #define ARGS_RECT(x) (x).left, (x).top, (x).width, (x).height
77 
78 #include "xlat/v4l2_pix_fmts.h"
79 #include "xlat/v4l2_sdr_fmts.h"
80 
81 static void
print_pixelformat(uint32_t fourcc,const struct xlat * xlat)82 print_pixelformat(uint32_t fourcc, const struct xlat *xlat)
83 {
84 	unsigned char a[] = {
85 		(unsigned char) fourcc,
86 		(unsigned char) (fourcc >> 8),
87 		(unsigned char) (fourcc >> 16),
88 		(unsigned char) (fourcc >> 24),
89 	};
90 	unsigned int i;
91 
92 	tprints("v4l2_fourcc(");
93 	for (i = 0; i < ARRAY_SIZE(a); ++i) {
94 		unsigned char c = a[i];
95 
96 		if (i)
97 			tprints(", ");
98 		if (c == '\'' || c == '\\') {
99 			char sym[] = {
100 				'\'',
101 				'\\',
102 				c,
103 				'\'',
104 				'\0'
105 			};
106 			tprints(sym);
107 		} else if (c >= ' ' && c <= 0x7e) {
108 			char sym[] = {
109 				'\'',
110 				c,
111 				'\'',
112 				'\0'
113 			};
114 			tprints(sym);
115 		} else {
116 			char hex[] = {
117 				'\'',
118 				'\\',
119 				'x',
120 				"0123456789abcdef"[c >> 4],
121 				"0123456789abcdef"[c & 0xf],
122 				'\'',
123 				'\0'
124 			};
125 			tprints(hex);
126 		}
127 	}
128 	tprints(")");
129 
130 	if (xlat) {
131 		const char *pixfmt_name = xlookup(xlat, fourcc);
132 
133 		if (pixfmt_name)
134 			tprints_comment(pixfmt_name);
135 	}
136 }
137 
138 #include "xlat/v4l2_device_capabilities_flags.h"
139 
140 static int
print_v4l2_capability(struct tcb * const tcp,const kernel_ulong_t arg)141 print_v4l2_capability(struct tcb *const tcp, const kernel_ulong_t arg)
142 {
143 	struct v4l2_capability caps;
144 
145 	if (entering(tcp))
146 		return 0;
147 	tprints(", ");
148 	if (umove_or_printaddr(tcp, arg, &caps))
149 		return RVAL_IOCTL_DECODED;
150 	PRINT_FIELD_CSTRING("{", caps, driver);
151 	PRINT_FIELD_CSTRING(", ", caps, card);
152 	PRINT_FIELD_CSTRING(", ", caps, bus_info);
153 	tprintf(", version=%u.%u.%u, capabilities=",
154 		(caps.version >> 16) & 0xFF,
155 		(caps.version >> 8) & 0xFF,
156 		caps.version & 0xFF);
157 	printflags(v4l2_device_capabilities_flags, caps.capabilities,
158 		   "V4L2_CAP_???");
159 #ifdef V4L2_CAP_DEVICE_CAPS
160 	tprints(", device_caps=");
161 	printflags(v4l2_device_capabilities_flags, caps.device_caps,
162 		   "V4L2_CAP_???");
163 #endif
164 	tprints("}");
165 	return RVAL_IOCTL_DECODED;
166 }
167 
168 #include "xlat/v4l2_buf_types.h"
169 #include "xlat/v4l2_format_description_flags.h"
170 
171 static int
print_v4l2_fmtdesc(struct tcb * const tcp,const kernel_ulong_t arg)172 print_v4l2_fmtdesc(struct tcb *const tcp, const kernel_ulong_t arg)
173 {
174 	struct v4l2_fmtdesc f;
175 
176 	if (entering(tcp)) {
177 		tprints(", ");
178 		if (umove_or_printaddr(tcp, arg, &f))
179 			return RVAL_IOCTL_DECODED;
180 		tprintf("{index=%u, type=", f.index);
181 		printxval(v4l2_buf_types, f.type, "V4L2_BUF_TYPE_???");
182 		return 0;
183 	}
184 
185 	if (!syserror(tcp) && !umove(tcp, arg, &f)) {
186 		tprints(", flags=");
187 		printflags(v4l2_format_description_flags, f.flags,
188 			   "V4L2_FMT_FLAG_???");
189 		PRINT_FIELD_CSTRING(", ", f, description);
190 		tprints(", pixelformat=");
191 		print_pixelformat(f.pixelformat, v4l2_pix_fmts);
192 	}
193 	tprints("}");
194 	return RVAL_IOCTL_DECODED;
195 }
196 
197 #include "xlat/v4l2_fields.h"
198 #include "xlat/v4l2_colorspaces.h"
199 #include "xlat/v4l2_vbi_flags.h"
200 #include "xlat/v4l2_sliced_flags.h"
201 
202 static bool
print_v4l2_clip(struct tcb * tcp,void * elem_buf,size_t elem_size,void * data)203 print_v4l2_clip(struct tcb *tcp, void *elem_buf, size_t elem_size, void *data)
204 {
205 	const struct_v4l2_clip *p = elem_buf;
206 	tprintf(FMT_RECT, ARGS_RECT(p->c));
207 	return true;
208 }
209 
210 static bool
print_v4l2_format_fmt(struct tcb * const tcp,const char * prefix,const struct_v4l2_format * f)211 print_v4l2_format_fmt(struct tcb *const tcp, const char *prefix,
212 		      const struct_v4l2_format *f)
213 {
214 	bool ret = true;
215 	switch (f->type) {
216 	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
217 	case V4L2_BUF_TYPE_VIDEO_OUTPUT:
218 		tprints(prefix);
219 		tprintf("fmt.pix={width=%u, height=%u, pixelformat=",
220 			f->fmt.pix.width, f->fmt.pix.height);
221 		print_pixelformat(f->fmt.pix.pixelformat, v4l2_pix_fmts);
222 		tprints(", field=");
223 		printxval(v4l2_fields, f->fmt.pix.field, "V4L2_FIELD_???");
224 		tprintf(", bytesperline=%u, sizeimage=%u, colorspace=",
225 			f->fmt.pix.bytesperline, f->fmt.pix.sizeimage);
226 		printxval(v4l2_colorspaces, f->fmt.pix.colorspace,
227 			  "V4L2_COLORSPACE_???");
228 		tprints("}");
229 		break;
230 #if HAVE_DECL_V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE
231 	case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
232 	case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: {
233 		unsigned int i, max;
234 
235 		tprints(prefix);
236 		tprintf("fmt.pix_mp={width=%u, height=%u, pixelformat=",
237 			f->fmt.pix_mp.width, f->fmt.pix_mp.height);
238 		print_pixelformat(f->fmt.pix_mp.pixelformat, v4l2_pix_fmts);
239 		tprints(", field=");
240 		printxval(v4l2_fields, f->fmt.pix_mp.field, "V4L2_FIELD_???");
241 		tprints(", colorspace=");
242 		printxval(v4l2_colorspaces, f->fmt.pix_mp.colorspace,
243 			  "V4L2_COLORSPACE_???");
244 		tprints(", plane_fmt=[");
245 		max = f->fmt.pix_mp.num_planes;
246 		if (max > VIDEO_MAX_PLANES)
247 			max = VIDEO_MAX_PLANES;
248 		for (i = 0; i < max; i++) {
249 			if (i > 0)
250 				tprints(", ");
251 			tprintf("{sizeimage=%u, bytesperline=%u}",
252 				f->fmt.pix_mp.plane_fmt[i].sizeimage,
253 				f->fmt.pix_mp.plane_fmt[i].bytesperline);
254 		}
255 		tprintf("], num_planes=%u}",
256 			(unsigned) f->fmt.pix_mp.num_planes);
257 		break;
258 	}
259 #endif
260 	/* OUTPUT_OVERLAY since Linux v2.6.22-rc1~1118^2~179 */
261 #if HAVE_DECL_V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY
262 	case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
263 #endif
264 	case V4L2_BUF_TYPE_VIDEO_OVERLAY: {
265 		struct_v4l2_clip clip;
266 		tprints(prefix);
267 		tprintf("fmt.win={left=%d, top=%d, width=%u, height=%u, field=",
268 			ARGS_RECT(f->fmt.win.w));
269 		printxval(v4l2_fields, f->fmt.win.field, "V4L2_FIELD_???");
270 		tprintf(", chromakey=%#x, clips=", f->fmt.win.chromakey);
271 		ret = print_array(tcp, ptr_to_kulong(f->fmt.win.clips),
272 				  f->fmt.win.clipcount, &clip, sizeof(clip),
273 				  tfetch_mem, print_v4l2_clip, 0);
274 		tprintf(", clipcount=%u, bitmap=", f->fmt.win.clipcount);
275 		printaddr(ptr_to_kulong(f->fmt.win.bitmap));
276 #ifdef HAVE_STRUCT_V4L2_WINDOW_GLOBAL_ALPHA
277 		tprintf(", global_alpha=%#x", f->fmt.win.global_alpha);
278 #endif
279 		tprints("}");
280 		break;
281 	}
282 	case V4L2_BUF_TYPE_VBI_CAPTURE:
283 	case V4L2_BUF_TYPE_VBI_OUTPUT:
284 		tprints(prefix);
285 		tprintf("fmt.vbi={sampling_rate=%u, offset=%u, "
286 			"samples_per_line=%u, sample_format=",
287 			f->fmt.vbi.sampling_rate, f->fmt.vbi.offset,
288 			f->fmt.vbi.samples_per_line);
289 		print_pixelformat(f->fmt.vbi.sample_format, v4l2_pix_fmts);
290 		tprintf(", start=[%u, %u], count=[%u, %u], ",
291 			f->fmt.vbi.start[0], f->fmt.vbi.start[1],
292 			f->fmt.vbi.count[0], f->fmt.vbi.count[1]);
293 		tprints("flags=");
294 		printxval(v4l2_vbi_flags, f->fmt.vbi.flags, "V4L2_VBI_???");
295 		tprints("}");
296 		break;
297 	/* both since Linux v2.6.14-rc2~64 */
298 #if HAVE_DECL_V4L2_BUF_TYPE_SLICED_VBI_CAPTURE
299 	case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
300 	case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: {
301 		unsigned int i, j;
302 
303 		tprints(prefix);
304 		tprints("fmt.sliced={service_set=");
305 		printxval(v4l2_sliced_flags, f->fmt.sliced.service_set,
306 			"V4L2_SLICED_???");
307 		tprintf(", io_size=%u, service_lines=[",
308 			f->fmt.sliced.io_size);
309 		for (i = 0; i < ARRAY_SIZE(f->fmt.sliced.service_lines); i++) {
310 			if (i > 0)
311 				tprints(", ");
312 			tprints("[");
313 			for (j = 0;
314 			     j < ARRAY_SIZE(f->fmt.sliced.service_lines[0]);
315 			     j++) {
316 				if (j > 0)
317 					tprints(", ");
318 				tprintf("%#x",
319 					f->fmt.sliced.service_lines[i][j]);
320 			}
321 			tprints("]");
322 		}
323 		tprints("]}");
324 		break;
325 	}
326 #endif
327 	/* since Linux v4.4-rc1~118^2~14 */
328 #if HAVE_DECL_V4L2_BUF_TYPE_SDR_OUTPUT
329 	case V4L2_BUF_TYPE_SDR_OUTPUT:
330 #endif
331 	/* since Linux v3.15-rc1~85^2~213 */
332 #if HAVE_DECL_V4L2_BUF_TYPE_SDR_CAPTURE
333 	case V4L2_BUF_TYPE_SDR_CAPTURE:
334 		tprints(prefix);
335 		tprints("fmt.sdr={pixelformat=");
336 		print_pixelformat(f->fmt.sdr.pixelformat, v4l2_sdr_fmts);
337 #ifdef HAVE_STRUCT_V4L2_SDR_FORMAT_BUFFERSIZE
338 		tprintf(", buffersize=%u",
339 			f->fmt.sdr.buffersize);
340 #endif
341 		tprints("}");
342 		break;
343 #endif
344 	}
345 	return ret;
346 }
347 
348 static int
print_v4l2_format(struct tcb * const tcp,const kernel_ulong_t arg,const bool is_get)349 print_v4l2_format(struct tcb *const tcp, const kernel_ulong_t arg,
350 		  const bool is_get)
351 {
352 	struct_v4l2_format f;
353 
354 	if (entering(tcp)) {
355 		tprints(", ");
356 		if (umove_or_printaddr(tcp, arg, &f))
357 			return RVAL_IOCTL_DECODED;
358 		tprints("{type=");
359 		printxval(v4l2_buf_types, f.type, "V4L2_BUF_TYPE_???");
360 		if (is_get)
361 			return 0;
362 		if (!print_v4l2_format_fmt(tcp, ", ", &f)) {
363 			tprints("}");
364 			return RVAL_IOCTL_DECODED;
365 		}
366 
367 		return 0;
368 	}
369 
370 	if (!syserror(tcp) && !umove(tcp, arg, &f))
371 		print_v4l2_format_fmt(tcp, is_get ? ", " : " => ", &f);
372 
373 	tprints("}");
374 
375 	return RVAL_IOCTL_DECODED;
376 }
377 
378 #include "xlat/v4l2_memories.h"
379 
380 static int
print_v4l2_requestbuffers(struct tcb * const tcp,const kernel_ulong_t arg)381 print_v4l2_requestbuffers(struct tcb *const tcp, const kernel_ulong_t arg)
382 {
383 	struct v4l2_requestbuffers reqbufs;
384 
385 	if (entering(tcp)) {
386 		tprints(", ");
387 
388 		if (umove_or_printaddr(tcp, arg, &reqbufs))
389 			return RVAL_IOCTL_DECODED;
390 
391 		tprintf("{type=");
392 		printxval(v4l2_buf_types, reqbufs.type, "V4L2_BUF_TYPE_???");
393 		tprints(", memory=");
394 		printxval(v4l2_memories, reqbufs.memory, "V4L2_MEMORY_???");
395 		tprintf(", count=%u", reqbufs.count);
396 
397 		return 0;
398 	}
399 
400 	if (!syserror(tcp)) {
401 		tprints(" => ");
402 
403 		if (!umove(tcp, arg, &reqbufs))
404 			tprintf("%u", reqbufs.count);
405 		else
406 			tprints("???");
407 	}
408 
409 	tprints("}");
410 
411 	return RVAL_IOCTL_DECODED;
412 }
413 
414 #include "xlat/v4l2_buf_flags.h"
415 
416 static int
print_v4l2_buffer(struct tcb * const tcp,const unsigned int code,const kernel_ulong_t arg)417 print_v4l2_buffer(struct tcb *const tcp, const unsigned int code,
418 		  const kernel_ulong_t arg)
419 {
420 	struct_v4l2_buffer b;
421 
422 	if (entering(tcp)) {
423 		tprints(", ");
424 		if (umove_or_printaddr(tcp, arg, &b))
425 			return RVAL_IOCTL_DECODED;
426 		tprints("{type=");
427 		printxval(v4l2_buf_types, b.type, "V4L2_BUF_TYPE_???");
428 		if (code != VIDIOC_DQBUF)
429 			tprintf(", index=%u", b.index);
430 
431 		return 0;
432 	}
433 
434 	if (!syserror(tcp) && !umove(tcp, arg, &b)) {
435 		if (code == VIDIOC_DQBUF)
436 			tprintf(", index=%u", b.index);
437 		tprints(", memory=");
438 		printxval(v4l2_memories, b.memory, "V4L2_MEMORY_???");
439 
440 		if (b.memory == V4L2_MEMORY_MMAP) {
441 			tprintf(", m.offset=%#x", b.m.offset);
442 		} else if (b.memory == V4L2_MEMORY_USERPTR) {
443 			tprints(", m.userptr=");
444 			printaddr(b.m.userptr);
445 		}
446 
447 		tprintf(", length=%u, bytesused=%u, flags=",
448 			b.length, b.bytesused);
449 		printflags(v4l2_buf_flags, b.flags, "V4L2_BUF_FLAG_???");
450 		if (code == VIDIOC_DQBUF) {
451 			tprints(", timestamp = ");
452 			MPERS_FUNC_NAME(print_struct_timeval)(&b.timestamp);
453 		}
454 		tprints(", ...");
455 	}
456 
457 	tprints("}");
458 
459 	return RVAL_IOCTL_DECODED;
460 }
461 
462 static int
print_v4l2_framebuffer(struct tcb * const tcp,const kernel_ulong_t arg)463 print_v4l2_framebuffer(struct tcb *const tcp, const kernel_ulong_t arg)
464 {
465 	struct_v4l2_framebuffer b;
466 
467 	tprints(", ");
468 	if (!umove_or_printaddr(tcp, arg, &b)) {
469 		tprintf("{capability=%#x, flags=%#x, base=",
470 			b.capability, b.flags);
471 		printaddr(ptr_to_kulong(b.base));
472 		tprints("}");
473 	}
474 
475 	return RVAL_IOCTL_DECODED;
476 }
477 
478 static int
print_v4l2_buf_type(struct tcb * const tcp,const kernel_ulong_t arg)479 print_v4l2_buf_type(struct tcb *const tcp, const kernel_ulong_t arg)
480 {
481 	int type;
482 
483 	tprints(", ");
484 	if (!umove_or_printaddr(tcp, arg, &type)) {
485 		tprints("[");
486 		printxval(v4l2_buf_types, type, "V4L2_BUF_TYPE_???");
487 		tprints("]");
488 	}
489 	return RVAL_IOCTL_DECODED;
490 }
491 
492 #include "xlat/v4l2_streaming_capabilities.h"
493 #include "xlat/v4l2_capture_modes.h"
494 
495 static int
print_v4l2_streamparm(struct tcb * const tcp,const kernel_ulong_t arg,const bool is_get)496 print_v4l2_streamparm(struct tcb *const tcp, const kernel_ulong_t arg,
497 		      const bool is_get)
498 {
499 	struct v4l2_streamparm s;
500 
501 	if (entering(tcp)) {
502 		tprints(", ");
503 		if (umove_or_printaddr(tcp, arg, &s))
504 			return RVAL_IOCTL_DECODED;
505 		tprints("{type=");
506 		printxval(v4l2_buf_types, s.type, "V4L2_BUF_TYPE_???");
507 		switch (s.type) {
508 			case V4L2_BUF_TYPE_VIDEO_CAPTURE:
509 			case V4L2_BUF_TYPE_VIDEO_OUTPUT:
510 				if (is_get)
511 					return 0;
512 				tprints(", ");
513 				break;
514 			default:
515 				tprints("}");
516 				return RVAL_IOCTL_DECODED;
517 		}
518 	} else {
519 		if (syserror(tcp) || umove(tcp, arg, &s) < 0) {
520 			tprints("}");
521 			return RVAL_IOCTL_DECODED;
522 		}
523 		tprints(is_get ? ", " : " => ");
524 	}
525 
526 	if (s.type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
527 		tprints("parm.capture={capability=");
528 		printflags(v4l2_streaming_capabilities,
529 			   s.parm.capture.capability, "V4L2_CAP_???");
530 
531 		tprints(", capturemode=");
532 		printflags(v4l2_capture_modes,
533 			   s.parm.capture.capturemode, "V4L2_MODE_???");
534 
535 		tprintf(", timeperframe=" FMT_FRACT,
536 			ARGS_FRACT(s.parm.capture.timeperframe));
537 
538 		tprintf(", extendedmode=%u, readbuffers=%u}",
539 			s.parm.capture.extendedmode,
540 			s.parm.capture.readbuffers);
541 	} else {
542 		tprints("parm.output={capability=");
543 		printflags(v4l2_streaming_capabilities,
544 			   s.parm.output.capability, "V4L2_CAP_???");
545 
546 		tprintf(", outputmode=%u", s.parm.output.outputmode);
547 
548 		tprintf(", timeperframe=" FMT_FRACT,
549 			ARGS_FRACT(s.parm.output.timeperframe));
550 
551 		tprintf(", extendedmode=%u, writebuffers=%u}",
552 			s.parm.output.extendedmode,
553 			s.parm.output.writebuffers);
554 	}
555 	if (entering(tcp)) {
556 		return 0;
557 	} else {
558 		tprints("}");
559 		return RVAL_IOCTL_DECODED;
560 	}
561 }
562 
563 static int
print_v4l2_standard(struct tcb * const tcp,const kernel_ulong_t arg)564 print_v4l2_standard(struct tcb *const tcp, const kernel_ulong_t arg)
565 {
566 	struct_v4l2_standard s;
567 
568 	if (entering(tcp)) {
569 		tprints(", ");
570 		if (umove_or_printaddr(tcp, arg, &s))
571 			return RVAL_IOCTL_DECODED;
572 		tprintf("{index=%u", s.index);
573 
574 		return 0;
575 	}
576 
577 	if (!syserror(tcp) && !umove(tcp, arg, &s)) {
578 		PRINT_FIELD_CSTRING(", ", s, name);
579 		tprintf(", frameperiod=" FMT_FRACT,
580 			ARGS_FRACT(s.frameperiod));
581 		tprintf(", framelines=%d", s.framelines);
582 	}
583 
584 	tprints("}");
585 
586 	return RVAL_IOCTL_DECODED;
587 }
588 
589 #include "xlat/v4l2_input_types.h"
590 
591 static int
print_v4l2_input(struct tcb * const tcp,const kernel_ulong_t arg)592 print_v4l2_input(struct tcb *const tcp, const kernel_ulong_t arg)
593 {
594 	struct_v4l2_input i;
595 
596 	if (entering(tcp)) {
597 		tprints(", ");
598 		if (umove_or_printaddr(tcp, arg, &i))
599 			return RVAL_IOCTL_DECODED;
600 		tprintf("{index=%u", i.index);
601 
602 		return 0;
603 	}
604 
605 	if (!syserror(tcp) && !umove(tcp, arg, &i)) {
606 		PRINT_FIELD_CSTRING(", ", i, name);
607 		tprints(", type=");
608 		printxval(v4l2_input_types, i.type, "V4L2_INPUT_TYPE_???");
609 	}
610 
611 	tprints("}");
612 
613 	return RVAL_IOCTL_DECODED;
614 }
615 
616 /*
617  * We include it here and not before print_v4l2_ext_controls as we need
618  * V4L2_CTRL_CLASS_* definitions for V4L2_CID_*_BASE ones.
619  */
620 #include "xlat/v4l2_control_classes.h"
621 #include "xlat/v4l2_control_id_bases.h"
622 #include "xlat/v4l2_control_ids.h"
623 
624 static int
print_v4l2_control(struct tcb * const tcp,const kernel_ulong_t arg,const bool is_get)625 print_v4l2_control(struct tcb *const tcp, const kernel_ulong_t arg,
626 		   const bool is_get)
627 {
628 	struct v4l2_control c;
629 
630 	if (entering(tcp)) {
631 		tprints(", ");
632 		if (umove_or_printaddr(tcp, arg, &c))
633 			return RVAL_IOCTL_DECODED;
634 		tprints("{id=");
635 		printxval(v4l2_control_ids, c.id, "V4L2_CID_???");
636 		if (!is_get)
637 			tprintf(", value=%d", c.value);
638 		return 0;
639 	}
640 
641 	if (!syserror(tcp) && !umove(tcp, arg, &c)) {
642 		tprints(is_get ? ", " : " => ");
643 		tprintf("value=%d", c.value);
644 	}
645 
646 	tprints("}");
647 
648 	return RVAL_IOCTL_DECODED;
649 }
650 
651 #include "xlat/v4l2_tuner_types.h"
652 #include "xlat/v4l2_tuner_capabilities.h"
653 #include "xlat/v4l2_tuner_rxsubchanses.h"
654 #include "xlat/v4l2_tuner_audmodes.h"
655 
656 static int
print_v4l2_tuner(struct tcb * const tcp,const kernel_ulong_t arg,const bool is_get)657 print_v4l2_tuner(struct tcb *const tcp, const kernel_ulong_t arg,
658 		 const bool is_get)
659 {
660 	struct v4l2_tuner c;
661 	if (entering(tcp)) {
662 		tprints(", ");
663 		if (umove_or_printaddr(tcp, arg, &c))
664 			return RVAL_IOCTL_DECODED;
665 		tprintf("{index=%u", c.index);
666 		if (is_get)
667 			return 0;
668 		tprints(", ");
669 	} else {
670 		if (syserror(tcp) || umove(tcp, arg, &c) < 0) {
671 			tprints("}");
672 			return RVAL_IOCTL_DECODED;
673 		}
674 		tprints(is_get ? ", " : " => ");
675 	}
676 
677 	PRINT_FIELD_CSTRING("", c, name);
678 	tprints(", type=");
679 	printxval(v4l2_tuner_types, c.type, "V4L2_TUNER_TYPE_???");
680 	tprints(", capability=");
681 	printxval(v4l2_tuner_capabilities, c.capability,
682 		  "V4L2_TUNER_CAP_???");
683 	tprintf(", rangelow=%u, rangehigh=%u, rxsubchans=",
684 		c.rangelow, c.rangehigh);
685 	printxval(v4l2_tuner_rxsubchanses, c.rxsubchans,
686 		  "V4L2_TUNER_SUB_???");
687 	tprints(", audmode=");
688 	printxval(v4l2_tuner_audmodes, c.audmode,
689 		  "V4L2_TUNER_MODE_???");
690 	tprintf(", signal=%d, afc=%d", c.signal, c.afc);
691 
692 	if (entering(tcp)) {
693 		return 0;
694 	} else {
695 		tprints("}");
696 		return RVAL_IOCTL_DECODED;
697 	}
698 }
699 
700 #include "xlat/v4l2_control_types.h"
701 #include "xlat/v4l2_control_flags.h"
702 
703 static int
print_v4l2_queryctrl(struct tcb * const tcp,const kernel_ulong_t arg)704 print_v4l2_queryctrl(struct tcb *const tcp, const kernel_ulong_t arg)
705 {
706 	struct v4l2_queryctrl c;
707 
708 	if (entering(tcp)) {
709 		tprints(", ");
710 		if (umove_or_printaddr(tcp, arg, &c))
711 			return RVAL_IOCTL_DECODED;
712 		tprints("{id=");
713 	} else {
714 		if (syserror(tcp) || umove(tcp, arg, &c) < 0) {
715 			tprints("}");
716 			return RVAL_IOCTL_DECODED;
717 		}
718 		if (get_tcb_priv_ulong(tcp))
719 			tprints(" => ");
720 	}
721 
722 	if (entering(tcp) || get_tcb_priv_ulong(tcp)) {
723 #ifdef V4L2_CTRL_FLAG_NEXT_CTRL
724 		const unsigned long next = c.id & V4L2_CTRL_FLAG_NEXT_CTRL;
725 		set_tcb_priv_ulong(tcp, next);
726 		if (next) {
727 			print_xlat(V4L2_CTRL_FLAG_NEXT_CTRL);
728 			tprints("|");
729 			c.id &= ~V4L2_CTRL_FLAG_NEXT_CTRL;
730 		}
731 #endif
732 		printxval(v4l2_control_ids, c.id, "V4L2_CID_???");
733 	}
734 
735 	if (exiting(tcp)) {
736 		tprints(", type=");
737 		printxval(v4l2_control_types, c.type, "V4L2_CTRL_TYPE_???");
738 		PRINT_FIELD_CSTRING(", ", c, name);
739 		tprintf(", minimum=%d, maximum=%d, step=%d"
740 			", default_value=%d, flags=",
741 			c.minimum, c.maximum, c.step, c.default_value);
742 		printflags(v4l2_control_flags, c.flags, "V4L2_CTRL_FLAG_???");
743 		tprints("}");
744 	}
745 	return entering(tcp) ? 0 : RVAL_IOCTL_DECODED;
746 }
747 
748 static int
print_v4l2_cropcap(struct tcb * const tcp,const kernel_ulong_t arg)749 print_v4l2_cropcap(struct tcb *const tcp, const kernel_ulong_t arg)
750 {
751 	struct v4l2_cropcap c;
752 
753 	if (entering(tcp)) {
754 		tprints(", ");
755 		if (umove_or_printaddr(tcp, arg, &c))
756 			return RVAL_IOCTL_DECODED;
757 		tprints("{type=");
758 		printxval(v4l2_buf_types, c.type, "V4L2_BUF_TYPE_???");
759 
760 		return 0;
761 	}
762 
763 	if (!syserror(tcp) && !umove(tcp, arg, &c)) {
764 		tprintf(", bounds=" FMT_RECT
765 			", defrect=" FMT_RECT
766 			", pixelaspect=" FMT_FRACT,
767 			ARGS_RECT(c.bounds),
768 			ARGS_RECT(c.defrect),
769 			ARGS_FRACT(c.pixelaspect));
770 	}
771 
772 	tprints("}");
773 
774 	return RVAL_IOCTL_DECODED;
775 }
776 
777 static int
print_v4l2_crop(struct tcb * const tcp,const kernel_ulong_t arg,const bool is_get)778 print_v4l2_crop(struct tcb *const tcp, const kernel_ulong_t arg,
779 		const bool is_get)
780 {
781 	struct v4l2_crop c;
782 
783 	if (entering(tcp)) {
784 		tprints(", ");
785 		if (umove_or_printaddr(tcp, arg, &c))
786 			return RVAL_IOCTL_DECODED;
787 		tprints("{type=");
788 		printxval(v4l2_buf_types, c.type, "V4L2_BUF_TYPE_???");
789 		if (is_get)
790 			return 0;
791 		tprintf(", c=" FMT_RECT, ARGS_RECT(c.c));
792 	} else {
793 		if (!syserror(tcp) && !umove(tcp, arg, &c))
794 			tprintf(", c=" FMT_RECT, ARGS_RECT(c.c));
795 	}
796 
797 	tprints("}");
798 
799 	return RVAL_IOCTL_DECODED;
800 }
801 
802 #ifdef VIDIOC_S_EXT_CTRLS
803 static bool
print_v4l2_ext_control(struct tcb * tcp,void * elem_buf,size_t elem_size,void * data)804 print_v4l2_ext_control(struct tcb *tcp, void *elem_buf, size_t elem_size, void *data)
805 {
806 	const struct_v4l2_ext_control *p = elem_buf;
807 
808 	tprints("{id=");
809 	printxval(v4l2_control_ids, p->id, "V4L2_CID_???");
810 # if HAVE_DECL_V4L2_CTRL_TYPE_STRING
811 	tprintf(", size=%u", p->size);
812 	if (p->size > 0) {
813 		tprints(", string=");
814 		printstrn(tcp, ptr_to_kulong(p->string), p->size);
815 	} else
816 # endif
817 	tprintf(", value=%d, value64=%" PRId64, p->value, (int64_t) p->value64);
818 	tprints("}");
819 
820 	return true;
821 }
822 
823 static int
print_v4l2_ext_controls(struct tcb * const tcp,const kernel_ulong_t arg,const bool is_get)824 print_v4l2_ext_controls(struct tcb *const tcp, const kernel_ulong_t arg,
825 			const bool is_get)
826 {
827 	struct_v4l2_ext_controls c;
828 
829 	if (entering(tcp)) {
830 		tprints(", ");
831 		if (umove_or_printaddr(tcp, arg, &c))
832 			return RVAL_IOCTL_DECODED;
833 		tprints("{ctrl_class=");
834 		printxval(v4l2_control_classes, c.ctrl_class,
835 			  "V4L2_CTRL_CLASS_???");
836 		tprintf(", count=%u", c.count);
837 		if (!c.count) {
838 			tprints("}");
839 			return RVAL_IOCTL_DECODED;
840 		}
841 		if (is_get)
842 			return 0;
843 		tprints(", ");
844 	} else {
845 		if (umove(tcp, arg, &c) < 0) {
846 			tprints("}");
847 			return RVAL_IOCTL_DECODED;
848 		}
849 		tprints(is_get ? ", " : " => ");
850 	}
851 
852 	tprints("controls=");
853 	struct_v4l2_ext_control ctrl;
854 	bool fail = !print_array(tcp, ptr_to_kulong(c.controls), c.count,
855 				 &ctrl, sizeof(ctrl),
856 				 tfetch_mem_ignore_syserror,
857 				 print_v4l2_ext_control, 0);
858 
859 	if (exiting(tcp) && syserror(tcp))
860 		tprintf(", error_idx=%u", c.error_idx);
861 
862 	if (exiting(tcp) || fail) {
863 		tprints("}");
864 		return RVAL_IOCTL_DECODED;
865 	}
866 
867 	/* entering */
868 	return 0;
869 }
870 #endif /* VIDIOC_S_EXT_CTRLS */
871 
872 #ifdef VIDIOC_ENUM_FRAMESIZES
873 # include "xlat/v4l2_framesize_types.h"
874 
875 static int
print_v4l2_frmsizeenum(struct tcb * const tcp,const kernel_ulong_t arg)876 print_v4l2_frmsizeenum(struct tcb *const tcp, const kernel_ulong_t arg)
877 {
878 	struct v4l2_frmsizeenum s;
879 
880 	if (entering(tcp)) {
881 		tprints(", ");
882 		if (umove_or_printaddr(tcp, arg, &s))
883 			return RVAL_IOCTL_DECODED;
884 		tprintf("{index=%u, pixel_format=", s.index);
885 		print_pixelformat(s.pixel_format, v4l2_pix_fmts);
886 		return 0;
887 	}
888 
889 	if (!syserror(tcp) && !umove(tcp, arg, &s)) {
890 		tprints(", type=");
891 		printxval(v4l2_framesize_types, s.type, "V4L2_FRMSIZE_TYPE_???");
892 		switch (s.type) {
893 		case V4L2_FRMSIZE_TYPE_DISCRETE:
894 			tprintf(", discrete={width=%u, height=%u}",
895 				s.discrete.width, s.discrete.height);
896 			break;
897 		case V4L2_FRMSIZE_TYPE_STEPWISE:
898 			tprintf(", stepwise={min_width=%u, max_width=%u, "
899 				"step_width=%u, min_height=%u, max_height=%u, "
900 				"step_height=%u}",
901 				s.stepwise.min_width, s.stepwise.max_width,
902 				s.stepwise.step_width, s.stepwise.min_height,
903 				s.stepwise.max_height, s.stepwise.step_height);
904 			break;
905 		}
906 	}
907 	tprints("}");
908 	return RVAL_IOCTL_DECODED;
909 }
910 #endif /* VIDIOC_ENUM_FRAMESIZES */
911 
912 #ifdef VIDIOC_ENUM_FRAMEINTERVALS
913 # include "xlat/v4l2_frameinterval_types.h"
914 
915 static int
print_v4l2_frmivalenum(struct tcb * const tcp,const kernel_ulong_t arg)916 print_v4l2_frmivalenum(struct tcb *const tcp, const kernel_ulong_t arg)
917 {
918 	struct v4l2_frmivalenum f;
919 
920 	if (entering(tcp)) {
921 		tprints(", ");
922 		if (umove_or_printaddr(tcp, arg, &f))
923 			return RVAL_IOCTL_DECODED;
924 		tprintf("{index=%u, pixel_format=", f.index);
925 		print_pixelformat(f.pixel_format, v4l2_pix_fmts);
926 		tprintf(", width=%u, height=%u", f.width, f.height);
927 		return 0;
928 	}
929 
930 	if (!syserror(tcp) && !umove(tcp, arg, &f)) {
931 		tprints(", type=");
932 		printxval(v4l2_frameinterval_types, f.type,
933 			  "V4L2_FRMIVAL_TYPE_???");
934 		switch (f.type) {
935 		case V4L2_FRMIVAL_TYPE_DISCRETE:
936 			tprintf(", discrete=" FMT_FRACT,
937 				ARGS_FRACT(f.discrete));
938 			break;
939 		case V4L2_FRMIVAL_TYPE_STEPWISE:
940 		case V4L2_FRMSIZE_TYPE_CONTINUOUS:
941 			tprintf(", stepwise={min=" FMT_FRACT ", max="
942 				FMT_FRACT ", step=" FMT_FRACT "}",
943 				ARGS_FRACT(f.stepwise.min),
944 				ARGS_FRACT(f.stepwise.max),
945 				ARGS_FRACT(f.stepwise.step));
946 			break;
947 		}
948 	}
949 
950 	tprints("}");
951 
952 	return RVAL_IOCTL_DECODED;
953 }
954 #endif /* VIDIOC_ENUM_FRAMEINTERVALS */
955 
956 #ifdef VIDIOC_CREATE_BUFS
957 static int
print_v4l2_create_buffers(struct tcb * const tcp,const kernel_ulong_t arg)958 print_v4l2_create_buffers(struct tcb *const tcp, const kernel_ulong_t arg)
959 {
960 	static const char fmt[] = "{index=%u, count=%u}";
961 	static char outstr[sizeof(fmt) + sizeof(int) * 6];
962 
963 	struct_v4l2_create_buffers b;
964 
965 	if (entering(tcp)) {
966 		tprints(", ");
967 		if (umove_or_printaddr(tcp, arg, &b))
968 			return RVAL_IOCTL_DECODED;
969 		tprintf("{count=%u, memory=", b.count);
970 		printxval(v4l2_memories, b.memory, "V4L2_MEMORY_???");
971 		tprints(", format={type=");
972 		printxval(v4l2_buf_types, b.format.type,
973 			  "V4L2_BUF_TYPE_???");
974 		print_v4l2_format_fmt(tcp, ", ",
975 				      (struct_v4l2_format *) &b.format);
976 		tprints("}}");
977 		return 0;
978 	}
979 
980 	if (syserror(tcp) || umove(tcp, arg, &b))
981 		return RVAL_IOCTL_DECODED;
982 
983 	xsprintf(outstr, fmt, b.index, b.count);
984 	tcp->auxstr = outstr;
985 
986 	return RVAL_IOCTL_DECODED | RVAL_STR;
987 }
988 #endif /* VIDIOC_CREATE_BUFS */
989 
MPERS_PRINTER_DECL(int,v4l2_ioctl,struct tcb * const tcp,const unsigned int code,const kernel_ulong_t arg)990 MPERS_PRINTER_DECL(int, v4l2_ioctl, struct tcb *const tcp,
991 		   const unsigned int code, const kernel_ulong_t arg)
992 {
993 	if (!verbose(tcp))
994 		return RVAL_DECODED;
995 
996 	switch (code) {
997 	case VIDIOC_QUERYCAP: /* R */
998 		return print_v4l2_capability(tcp, arg);
999 
1000 	case VIDIOC_ENUM_FMT: /* RW */
1001 		return print_v4l2_fmtdesc(tcp, arg);
1002 
1003 	case VIDIOC_G_FMT: /* RW */
1004 	case VIDIOC_S_FMT: /* RW */
1005 	case VIDIOC_TRY_FMT: /* RW */
1006 		return print_v4l2_format(tcp, arg, code == VIDIOC_G_FMT);
1007 
1008 	case VIDIOC_REQBUFS: /* RW */
1009 		return print_v4l2_requestbuffers(tcp, arg);
1010 
1011 	case VIDIOC_QUERYBUF: /* RW */
1012 	case VIDIOC_QBUF: /* RW */
1013 	case VIDIOC_DQBUF: /* RW */
1014 		return print_v4l2_buffer(tcp, code, arg);
1015 
1016 	case VIDIOC_G_FBUF: /* R */
1017 		if (entering(tcp))
1018 			return 0;
1019 		ATTRIBUTE_FALLTHROUGH;
1020 	case VIDIOC_S_FBUF: /* W */
1021 		return print_v4l2_framebuffer(tcp, arg);
1022 
1023 	case VIDIOC_STREAMON: /* W */
1024 	case VIDIOC_STREAMOFF: /* W */
1025 		return print_v4l2_buf_type(tcp, arg);
1026 
1027 	case VIDIOC_G_PARM: /* RW */
1028 	case VIDIOC_S_PARM: /* RW */
1029 		return print_v4l2_streamparm(tcp, arg, code == VIDIOC_G_PARM);
1030 
1031 	case VIDIOC_G_STD: /* R */
1032 		if (entering(tcp))
1033 			return 0;
1034 		ATTRIBUTE_FALLTHROUGH;
1035 	case VIDIOC_S_STD: /* W */
1036 		tprints(", ");
1037 		printnum_int64(tcp, arg, "%#" PRIx64);
1038 		break;
1039 
1040 	case VIDIOC_ENUMSTD: /* RW */
1041 		return print_v4l2_standard(tcp, arg);
1042 
1043 	case VIDIOC_ENUMINPUT: /* RW */
1044 		return print_v4l2_input(tcp, arg);
1045 
1046 	case VIDIOC_G_CTRL: /* RW */
1047 	case VIDIOC_S_CTRL: /* RW */
1048 		return print_v4l2_control(tcp, arg, code == VIDIOC_G_CTRL);
1049 
1050 	case VIDIOC_G_TUNER: /* RW */
1051 	case VIDIOC_S_TUNER: /* RW */
1052 		return print_v4l2_tuner(tcp, arg, code == VIDIOC_G_TUNER);
1053 
1054 	case VIDIOC_QUERYCTRL: /* RW */
1055 		return print_v4l2_queryctrl(tcp, arg);
1056 
1057 	case VIDIOC_G_INPUT: /* R */
1058 		if (entering(tcp))
1059 			return 0;
1060 		ATTRIBUTE_FALLTHROUGH;
1061 	case VIDIOC_S_INPUT: /* RW */
1062 		tprints(", ");
1063 		printnum_int(tcp, arg, "%u");
1064 		break;
1065 
1066 	case VIDIOC_CROPCAP: /* RW */
1067 		return print_v4l2_cropcap(tcp, arg);
1068 
1069 	case VIDIOC_G_CROP: /* RW */
1070 	case VIDIOC_S_CROP: /* W */
1071 		return print_v4l2_crop(tcp, arg, code == VIDIOC_G_CROP);
1072 
1073 #ifdef VIDIOC_S_EXT_CTRLS
1074 	case VIDIOC_S_EXT_CTRLS: /* RW */
1075 	case VIDIOC_TRY_EXT_CTRLS: /* RW */
1076 	case VIDIOC_G_EXT_CTRLS: /* RW */
1077 		return print_v4l2_ext_controls(tcp, arg,
1078 					       code == VIDIOC_G_EXT_CTRLS);
1079 #endif /* VIDIOC_S_EXT_CTRLS */
1080 
1081 #ifdef VIDIOC_ENUM_FRAMESIZES
1082 	case VIDIOC_ENUM_FRAMESIZES: /* RW */
1083 		return print_v4l2_frmsizeenum(tcp, arg);
1084 #endif /* VIDIOC_ENUM_FRAMESIZES */
1085 
1086 #ifdef VIDIOC_ENUM_FRAMEINTERVALS
1087 	case VIDIOC_ENUM_FRAMEINTERVALS: /* RW */
1088 		return print_v4l2_frmivalenum(tcp, arg);
1089 #endif /* VIDIOC_ENUM_FRAMEINTERVALS */
1090 
1091 #ifdef VIDIOC_CREATE_BUFS
1092 	case VIDIOC_CREATE_BUFS: /* RW */
1093 		return print_v4l2_create_buffers(tcp, arg);
1094 #endif /* VIDIOC_CREATE_BUFS */
1095 
1096 	default:
1097 		return RVAL_DECODED;
1098 	}
1099 
1100 	return RVAL_IOCTL_DECODED;
1101 }
1102