Commit | Line | Data |
---|---|---|
cf664a64 PDM |
1 | /* |
2 | * ioctl32.c: Conversion between 32bit and 64bit native ioctls. | |
3 | * Separated from fs stuff by Arnd Bergmann <arnd@arndb.de> | |
4 | * | |
5 | * Copyright (C) 1997-2000 Jakub Jelinek (jakub@redhat.com) | |
6 | * Copyright (C) 1998 Eddie C. Dost (ecd@skynet.be) | |
7 | * Copyright (C) 2001,2002 Andi Kleen, SuSE Labs | |
a2531293 | 8 | * Copyright (C) 2003 Pavel Machek (pavel@ucw.cz) |
cf664a64 | 9 | * Copyright (C) 2005 Philippe De Muyter (phdm@macqel.be) |
92f45bad | 10 | * Copyright (C) 2008 Hans Verkuil <hverkuil@xs4all.nl> |
cf664a64 PDM |
11 | * |
12 | * These routines maintain argument size conversion between 32bit and 64bit | |
13 | * ioctls. | |
14 | */ | |
15 | ||
0d0fbf81 | 16 | #include <linux/compat.h> |
133b7354 | 17 | #include <linux/module.h> |
b9d0aa6e | 18 | #include <linux/videodev2.h> |
ed45ce2c | 19 | #include <linux/v4l2-subdev.h> |
b9d0aa6e | 20 | #include <media/v4l2-dev.h> |
b8c601e8 HV |
21 | #include <media/v4l2-fh.h> |
22 | #include <media/v4l2-ctrls.h> | |
2864462e | 23 | #include <media/v4l2-ioctl.h> |
0d0fbf81 | 24 | |
1d338b86 MCC |
25 | /** |
26 | * assign_in_user() - Copy from one __user var to another one | |
27 | * | |
28 | * @to: __user var where data will be stored | |
29 | * @from: __user var where data will be retrieved. | |
30 | * | |
31 | * As this code very often needs to allocate userspace memory, it is easier | |
32 | * to have a macro that will do both get_user() and put_user() at once. | |
33 | * | |
34 | * This function complements the macros defined at asm-generic/uaccess.h. | |
35 | * It uses the same argument order as copy_in_user() | |
36 | */ | |
a1dfb4c4 DM |
37 | #define assign_in_user(to, from) \ |
38 | ({ \ | |
39 | typeof(*from) __assign_tmp; \ | |
40 | \ | |
41 | get_user(__assign_tmp, from) || put_user(__assign_tmp, to); \ | |
42 | }) | |
43 | ||
1d338b86 MCC |
44 | /** |
45 | * get_user_cast() - Stores at a kernelspace local var the contents from a | |
46 | * pointer with userspace data that is not tagged with __user. | |
47 | * | |
48 | * @__x: var where data will be stored | |
49 | * @__ptr: var where data will be retrieved. | |
50 | * | |
51 | * Sometimes we need to declare a pointer without __user because it | |
52 | * comes from a pointer struct field that will be retrieved from userspace | |
53 | * by the 64-bit native ioctl handler. This function ensures that the | |
54 | * @__ptr will be cast to __user before calling get_user() in order to | |
55 | * avoid warnings with static code analyzers like smatch. | |
56 | */ | |
09c033b6 MCC |
57 | #define get_user_cast(__x, __ptr) \ |
58 | ({ \ | |
59 | get_user(__x, (typeof(*__ptr) __user *)(__ptr)); \ | |
60 | }) | |
61 | ||
1d338b86 MCC |
62 | /** |
63 | * put_user_force() - Stores the contents of a kernelspace local var | |
64 | * into a userspace pointer, removing any __user cast. | |
65 | * | |
66 | * @__x: var where data will be stored | |
67 | * @__ptr: var where data will be retrieved. | |
68 | * | |
69 | * Sometimes we need to remove the __user attribute from some data, | |
70 | * by passing the __force macro. This function ensures that the | |
71 | * @__ptr will be cast with __force before calling put_user(), in order to | |
72 | * avoid warnings with static code analyzers like smatch. | |
73 | */ | |
09c033b6 MCC |
74 | #define put_user_force(__x, __ptr) \ |
75 | ({ \ | |
76 | put_user((typeof(*__x) __force *)(__x), __ptr); \ | |
77 | }) | |
78 | ||
1d338b86 MCC |
79 | /** |
80 | * assign_in_user_cast() - Copy from one __user var to another one | |
81 | * | |
82 | * @to: __user var where data will be stored | |
83 | * @from: var where data will be retrieved that needs to be cast to __user. | |
84 | * | |
85 | * As this code very often needs to allocate userspace memory, it is easier | |
86 | * to have a macro that will do both get_user_cast() and put_user() at once. | |
87 | * | |
88 | * This function should be used instead of assign_in_user() when the @from | |
89 | * variable was not declared as __user. See get_user_cast() for more details. | |
90 | * | |
91 | * This function complements the macros defined at asm-generic/uaccess.h. | |
92 | * It uses the same argument order as copy_in_user() | |
93 | */ | |
09c033b6 MCC |
94 | #define assign_in_user_cast(to, from) \ |
95 | ({ \ | |
96 | typeof(*from) __assign_tmp; \ | |
97 | \ | |
98 | get_user_cast(__assign_tmp, from) || put_user(__assign_tmp, to);\ | |
99 | }) | |
100 | ||
1d338b86 MCC |
101 | /** |
102 | * native_ioctl - Ancillary function that calls the native 64 bits ioctl | |
103 | * handler. | |
104 | * | |
105 | * @file: pointer to &struct file with the file handler | |
106 | * @cmd: ioctl to be called | |
107 | * @arg: arguments passed from/to the ioctl handler | |
108 | * | |
109 | * This function calls the native ioctl handler at v4l2-dev, e. g. v4l2_ioctl() | |
110 | */ | |
069b7479 | 111 | static long native_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
92f45bad | 112 | { |
069b7479 | 113 | long ret = -ENOIOCTLCMD; |
92f45bad HV |
114 | |
115 | if (file->f_op->unlocked_ioctl) | |
116 | ret = file->f_op->unlocked_ioctl(file, cmd, arg); | |
92f45bad HV |
117 | |
118 | return ret; | |
119 | } | |
120 | ||
121 | ||
1d338b86 MCC |
122 | /* |
123 | * Per-ioctl data copy handlers. | |
124 | * | |
125 | * Those come in pairs, with a get_v4l2_foo() and a put_v4l2_foo() routine, | |
126 | * where "v4l2_foo" is the name of the V4L2 struct. | |
127 | * | |
128 | * They basically get two __user pointers, one with a 32-bits struct that | |
129 | * came from the userspace call and a 64-bits struct, also allocated as | |
130 | * userspace, but filled internally by do_video_ioctl(). | |
131 | * | |
132 | * For ioctls that have pointers inside it, the functions will also | |
133 | * receive an ancillary buffer with extra space, used to pass extra | |
134 | * data to the routine. | |
135 | */ | |
136 | ||
d1f81da2 | 137 | struct v4l2_clip32 { |
cf664a64 | 138 | struct v4l2_rect c; |
6e6a8b5a | 139 | compat_caddr_t next; |
cf664a64 PDM |
140 | }; |
141 | ||
d1f81da2 | 142 | struct v4l2_window32 { |
cf664a64 | 143 | struct v4l2_rect w; |
4a3fad70 | 144 | __u32 field; /* enum v4l2_field */ |
cf664a64 PDM |
145 | __u32 chromakey; |
146 | compat_caddr_t clips; /* actually struct v4l2_clip32 * */ | |
147 | __u32 clipcount; | |
148 | compat_caddr_t bitmap; | |
025a26fa | 149 | __u8 global_alpha; |
cf664a64 PDM |
150 | }; |
151 | ||
6dd0394f MCC |
152 | static int get_v4l2_window32(struct v4l2_window __user *p64, |
153 | struct v4l2_window32 __user *p32, | |
a1dfb4c4 | 154 | void __user *aux_buf, u32 aux_space) |
cf664a64 | 155 | { |
a751be5b HV |
156 | struct v4l2_clip32 __user *uclips; |
157 | struct v4l2_clip __user *kclips; | |
158 | compat_caddr_t p; | |
a1dfb4c4 | 159 | u32 clipcount; |
a751be5b | 160 | |
96d4f267 | 161 | if (!access_ok(p32, sizeof(*p32)) || |
6dd0394f MCC |
162 | copy_in_user(&p64->w, &p32->w, sizeof(p32->w)) || |
163 | assign_in_user(&p64->field, &p32->field) || | |
164 | assign_in_user(&p64->chromakey, &p32->chromakey) || | |
165 | assign_in_user(&p64->global_alpha, &p32->global_alpha) || | |
166 | get_user(clipcount, &p32->clipcount) || | |
167 | put_user(clipcount, &p64->clipcount)) | |
b7b957d4 | 168 | return -EFAULT; |
a1dfb4c4 | 169 | if (clipcount > 2048) |
cf664a64 | 170 | return -EINVAL; |
a1dfb4c4 | 171 | if (!clipcount) |
6dd0394f | 172 | return put_user(NULL, &p64->clips); |
cf664a64 | 173 | |
6dd0394f | 174 | if (get_user(p, &p32->clips)) |
a751be5b HV |
175 | return -EFAULT; |
176 | uclips = compat_ptr(p); | |
a1dfb4c4 DM |
177 | if (aux_space < clipcount * sizeof(*kclips)) |
178 | return -EFAULT; | |
179 | kclips = aux_buf; | |
6dd0394f | 180 | if (put_user(kclips, &p64->clips)) |
a1dfb4c4 DM |
181 | return -EFAULT; |
182 | ||
183 | while (clipcount--) { | |
a751be5b | 184 | if (copy_in_user(&kclips->c, &uclips->c, sizeof(uclips->c))) |
5b1a43d7 | 185 | return -EFAULT; |
a1dfb4c4 | 186 | if (put_user(clipcount ? kclips + 1 : NULL, &kclips->next)) |
a751be5b HV |
187 | return -EFAULT; |
188 | uclips++; | |
189 | kclips++; | |
190 | } | |
cf664a64 PDM |
191 | return 0; |
192 | } | |
193 | ||
6dd0394f MCC |
194 | static int put_v4l2_window32(struct v4l2_window __user *p64, |
195 | struct v4l2_window32 __user *p32) | |
cf664a64 | 196 | { |
85ea29f1 | 197 | struct v4l2_clip __user *kclips; |
a751be5b | 198 | struct v4l2_clip32 __user *uclips; |
a751be5b | 199 | compat_caddr_t p; |
a1dfb4c4 DM |
200 | u32 clipcount; |
201 | ||
6dd0394f MCC |
202 | if (copy_in_user(&p32->w, &p64->w, sizeof(p64->w)) || |
203 | assign_in_user(&p32->field, &p64->field) || | |
204 | assign_in_user(&p32->chromakey, &p64->chromakey) || | |
205 | assign_in_user(&p32->global_alpha, &p64->global_alpha) || | |
206 | get_user(clipcount, &p64->clipcount) || | |
207 | put_user(clipcount, &p32->clipcount)) | |
b7b957d4 | 208 | return -EFAULT; |
a1dfb4c4 | 209 | if (!clipcount) |
a751be5b HV |
210 | return 0; |
211 | ||
6dd0394f | 212 | if (get_user(kclips, &p64->clips)) |
85ea29f1 | 213 | return -EFAULT; |
6dd0394f | 214 | if (get_user(p, &p32->clips)) |
a751be5b HV |
215 | return -EFAULT; |
216 | uclips = compat_ptr(p); | |
a1dfb4c4 | 217 | while (clipcount--) { |
a751be5b HV |
218 | if (copy_in_user(&uclips->c, &kclips->c, sizeof(uclips->c))) |
219 | return -EFAULT; | |
220 | uclips++; | |
221 | kclips++; | |
222 | } | |
cf664a64 PDM |
223 | return 0; |
224 | } | |
225 | ||
d1f81da2 | 226 | struct v4l2_format32 { |
6016af82 | 227 | __u32 type; /* enum v4l2_buf_type */ |
d1f81da2 | 228 | union { |
92f45bad | 229 | struct v4l2_pix_format pix; |
52a3082f | 230 | struct v4l2_pix_format_mplane pix_mp; |
92f45bad HV |
231 | struct v4l2_window32 win; |
232 | struct v4l2_vbi_format vbi; | |
233 | struct v4l2_sliced_vbi_format sliced; | |
d5beb67b | 234 | struct v4l2_sdr_format sdr; |
fb9ffa6a | 235 | struct v4l2_meta_format meta; |
d1f81da2 | 236 | __u8 raw_data[200]; /* user-defined */ |
cf664a64 PDM |
237 | } fmt; |
238 | }; | |
239 | ||
09362ec2 GL |
240 | /** |
241 | * struct v4l2_create_buffers32 - VIDIOC_CREATE_BUFS32 argument | |
242 | * @index: on return, index of the first created buffer | |
243 | * @count: entry: number of requested buffers, | |
244 | * return: number of created buffers | |
245 | * @memory: buffer memory type | |
246 | * @format: frame format, for which buffers are requested | |
9e39b436 | 247 | * @capabilities: capabilities of this buffer type. |
09362ec2 GL |
248 | * @reserved: future extensions |
249 | */ | |
2150158b | 250 | struct v4l2_create_buffers32 { |
09362ec2 | 251 | __u32 index; |
2150158b | 252 | __u32 count; |
6016af82 | 253 | __u32 memory; /* enum v4l2_memory */ |
09362ec2 | 254 | struct v4l2_format32 format; |
e5079cf1 HV |
255 | __u32 capabilities; |
256 | __u32 reserved[7]; | |
2150158b GL |
257 | }; |
258 | ||
6dd0394f | 259 | static int __bufsize_v4l2_format(struct v4l2_format32 __user *p32, u32 *size) |
a1dfb4c4 DM |
260 | { |
261 | u32 type; | |
262 | ||
6dd0394f | 263 | if (get_user(type, &p32->type)) |
a1dfb4c4 DM |
264 | return -EFAULT; |
265 | ||
266 | switch (type) { | |
267 | case V4L2_BUF_TYPE_VIDEO_OVERLAY: | |
268 | case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: { | |
269 | u32 clipcount; | |
270 | ||
6dd0394f | 271 | if (get_user(clipcount, &p32->fmt.win.clipcount)) |
a1dfb4c4 DM |
272 | return -EFAULT; |
273 | if (clipcount > 2048) | |
274 | return -EINVAL; | |
275 | *size = clipcount * sizeof(struct v4l2_clip); | |
276 | return 0; | |
277 | } | |
278 | default: | |
279 | *size = 0; | |
280 | return 0; | |
281 | } | |
282 | } | |
283 | ||
6dd0394f | 284 | static int bufsize_v4l2_format(struct v4l2_format32 __user *p32, u32 *size) |
a1dfb4c4 | 285 | { |
96d4f267 | 286 | if (!access_ok(p32, sizeof(*p32))) |
a1dfb4c4 | 287 | return -EFAULT; |
6dd0394f | 288 | return __bufsize_v4l2_format(p32, size); |
a1dfb4c4 DM |
289 | } |
290 | ||
6dd0394f MCC |
291 | static int __get_v4l2_format32(struct v4l2_format __user *p64, |
292 | struct v4l2_format32 __user *p32, | |
a1dfb4c4 | 293 | void __user *aux_buf, u32 aux_space) |
cf664a64 | 294 | { |
a1dfb4c4 DM |
295 | u32 type; |
296 | ||
6dd0394f | 297 | if (get_user(type, &p32->type) || put_user(type, &p64->type)) |
ec77581a GL |
298 | return -EFAULT; |
299 | ||
a1dfb4c4 | 300 | switch (type) { |
cf664a64 | 301 | case V4L2_BUF_TYPE_VIDEO_CAPTURE: |
92f45bad | 302 | case V4L2_BUF_TYPE_VIDEO_OUTPUT: |
6dd0394f MCC |
303 | return copy_in_user(&p64->fmt.pix, &p32->fmt.pix, |
304 | sizeof(p64->fmt.pix)) ? -EFAULT : 0; | |
52a3082f PO |
305 | case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: |
306 | case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: | |
6dd0394f MCC |
307 | return copy_in_user(&p64->fmt.pix_mp, &p32->fmt.pix_mp, |
308 | sizeof(p64->fmt.pix_mp)) ? -EFAULT : 0; | |
cf664a64 | 309 | case V4L2_BUF_TYPE_VIDEO_OVERLAY: |
92f45bad | 310 | case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: |
6dd0394f | 311 | return get_v4l2_window32(&p64->fmt.win, &p32->fmt.win, |
a1dfb4c4 | 312 | aux_buf, aux_space); |
cf664a64 | 313 | case V4L2_BUF_TYPE_VBI_CAPTURE: |
92f45bad | 314 | case V4L2_BUF_TYPE_VBI_OUTPUT: |
6dd0394f MCC |
315 | return copy_in_user(&p64->fmt.vbi, &p32->fmt.vbi, |
316 | sizeof(p64->fmt.vbi)) ? -EFAULT : 0; | |
92f45bad HV |
317 | case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: |
318 | case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: | |
6dd0394f MCC |
319 | return copy_in_user(&p64->fmt.sliced, &p32->fmt.sliced, |
320 | sizeof(p64->fmt.sliced)) ? -EFAULT : 0; | |
d5beb67b | 321 | case V4L2_BUF_TYPE_SDR_CAPTURE: |
9effc72f | 322 | case V4L2_BUF_TYPE_SDR_OUTPUT: |
6dd0394f MCC |
323 | return copy_in_user(&p64->fmt.sdr, &p32->fmt.sdr, |
324 | sizeof(p64->fmt.sdr)) ? -EFAULT : 0; | |
fb9ffa6a | 325 | case V4L2_BUF_TYPE_META_CAPTURE: |
72148d1a | 326 | case V4L2_BUF_TYPE_META_OUTPUT: |
6dd0394f MCC |
327 | return copy_in_user(&p64->fmt.meta, &p32->fmt.meta, |
328 | sizeof(p64->fmt.meta)) ? -EFAULT : 0; | |
cf664a64 | 329 | default: |
92f45bad | 330 | return -EINVAL; |
cf664a64 PDM |
331 | } |
332 | } | |
333 | ||
6dd0394f MCC |
334 | static int get_v4l2_format32(struct v4l2_format __user *p64, |
335 | struct v4l2_format32 __user *p32, | |
a1dfb4c4 | 336 | void __user *aux_buf, u32 aux_space) |
2150158b | 337 | { |
96d4f267 | 338 | if (!access_ok(p32, sizeof(*p32))) |
ec77581a | 339 | return -EFAULT; |
6dd0394f | 340 | return __get_v4l2_format32(p64, p32, aux_buf, aux_space); |
2150158b GL |
341 | } |
342 | ||
6dd0394f | 343 | static int bufsize_v4l2_create(struct v4l2_create_buffers32 __user *p32, |
a1dfb4c4 DM |
344 | u32 *size) |
345 | { | |
96d4f267 | 346 | if (!access_ok(p32, sizeof(*p32))) |
a1dfb4c4 | 347 | return -EFAULT; |
6dd0394f | 348 | return __bufsize_v4l2_format(&p32->format, size); |
a1dfb4c4 DM |
349 | } |
350 | ||
6dd0394f MCC |
351 | static int get_v4l2_create32(struct v4l2_create_buffers __user *p64, |
352 | struct v4l2_create_buffers32 __user *p32, | |
a1dfb4c4 | 353 | void __user *aux_buf, u32 aux_space) |
2150158b | 354 | { |
96d4f267 | 355 | if (!access_ok(p32, sizeof(*p32)) || |
6dd0394f | 356 | copy_in_user(p64, p32, |
a1dfb4c4 | 357 | offsetof(struct v4l2_create_buffers32, format))) |
ec77581a | 358 | return -EFAULT; |
6dd0394f | 359 | return __get_v4l2_format32(&p64->format, &p32->format, |
a1dfb4c4 | 360 | aux_buf, aux_space); |
2150158b GL |
361 | } |
362 | ||
6dd0394f MCC |
363 | static int __put_v4l2_format32(struct v4l2_format __user *p64, |
364 | struct v4l2_format32 __user *p32) | |
cf664a64 | 365 | { |
a1dfb4c4 DM |
366 | u32 type; |
367 | ||
6dd0394f | 368 | if (get_user(type, &p64->type)) |
6ed9b285 GL |
369 | return -EFAULT; |
370 | ||
a1dfb4c4 | 371 | switch (type) { |
cf664a64 | 372 | case V4L2_BUF_TYPE_VIDEO_CAPTURE: |
92f45bad | 373 | case V4L2_BUF_TYPE_VIDEO_OUTPUT: |
6dd0394f MCC |
374 | return copy_in_user(&p32->fmt.pix, &p64->fmt.pix, |
375 | sizeof(p64->fmt.pix)) ? -EFAULT : 0; | |
52a3082f PO |
376 | case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: |
377 | case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: | |
6dd0394f MCC |
378 | return copy_in_user(&p32->fmt.pix_mp, &p64->fmt.pix_mp, |
379 | sizeof(p64->fmt.pix_mp)) ? -EFAULT : 0; | |
cf664a64 | 380 | case V4L2_BUF_TYPE_VIDEO_OVERLAY: |
92f45bad | 381 | case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: |
6dd0394f | 382 | return put_v4l2_window32(&p64->fmt.win, &p32->fmt.win); |
cf664a64 | 383 | case V4L2_BUF_TYPE_VBI_CAPTURE: |
92f45bad | 384 | case V4L2_BUF_TYPE_VBI_OUTPUT: |
6dd0394f MCC |
385 | return copy_in_user(&p32->fmt.vbi, &p64->fmt.vbi, |
386 | sizeof(p64->fmt.vbi)) ? -EFAULT : 0; | |
92f45bad HV |
387 | case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: |
388 | case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: | |
6dd0394f MCC |
389 | return copy_in_user(&p32->fmt.sliced, &p64->fmt.sliced, |
390 | sizeof(p64->fmt.sliced)) ? -EFAULT : 0; | |
d5beb67b | 391 | case V4L2_BUF_TYPE_SDR_CAPTURE: |
9effc72f | 392 | case V4L2_BUF_TYPE_SDR_OUTPUT: |
6dd0394f MCC |
393 | return copy_in_user(&p32->fmt.sdr, &p64->fmt.sdr, |
394 | sizeof(p64->fmt.sdr)) ? -EFAULT : 0; | |
fb9ffa6a | 395 | case V4L2_BUF_TYPE_META_CAPTURE: |
72148d1a | 396 | case V4L2_BUF_TYPE_META_OUTPUT: |
6dd0394f MCC |
397 | return copy_in_user(&p32->fmt.meta, &p64->fmt.meta, |
398 | sizeof(p64->fmt.meta)) ? -EFAULT : 0; | |
cf664a64 | 399 | default: |
92f45bad | 400 | return -EINVAL; |
cf664a64 PDM |
401 | } |
402 | } | |
403 | ||
6dd0394f MCC |
404 | static int put_v4l2_format32(struct v4l2_format __user *p64, |
405 | struct v4l2_format32 __user *p32) | |
2150158b | 406 | { |
96d4f267 | 407 | if (!access_ok(p32, sizeof(*p32))) |
2150158b | 408 | return -EFAULT; |
6dd0394f | 409 | return __put_v4l2_format32(p64, p32); |
2150158b GL |
410 | } |
411 | ||
6dd0394f MCC |
412 | static int put_v4l2_create32(struct v4l2_create_buffers __user *p64, |
413 | struct v4l2_create_buffers32 __user *p32) | |
2150158b | 414 | { |
96d4f267 | 415 | if (!access_ok(p32, sizeof(*p32)) || |
6dd0394f | 416 | copy_in_user(p32, p64, |
a1dfb4c4 | 417 | offsetof(struct v4l2_create_buffers32, format)) || |
e5079cf1 | 418 | assign_in_user(&p32->capabilities, &p64->capabilities) || |
6dd0394f | 419 | copy_in_user(p32->reserved, p64->reserved, sizeof(p64->reserved))) |
6ed9b285 | 420 | return -EFAULT; |
6dd0394f | 421 | return __put_v4l2_format32(&p64->format, &p32->format); |
2150158b GL |
422 | } |
423 | ||
d1f81da2 | 424 | struct v4l2_standard32 { |
cf664a64 | 425 | __u32 index; |
655e9780 | 426 | compat_u64 id; |
cf664a64 PDM |
427 | __u8 name[24]; |
428 | struct v4l2_fract frameperiod; /* Frames, not fields */ | |
429 | __u32 framelines; | |
430 | __u32 reserved[4]; | |
431 | }; | |
432 | ||
6dd0394f MCC |
433 | static int get_v4l2_standard32(struct v4l2_standard __user *p64, |
434 | struct v4l2_standard32 __user *p32) | |
cf664a64 PDM |
435 | { |
436 | /* other fields are not set by the user, nor used by the driver */ | |
96d4f267 | 437 | if (!access_ok(p32, sizeof(*p32)) || |
6dd0394f | 438 | assign_in_user(&p64->index, &p32->index)) |
a113bc78 GM |
439 | return -EFAULT; |
440 | return 0; | |
cf664a64 PDM |
441 | } |
442 | ||
6dd0394f MCC |
443 | static int put_v4l2_standard32(struct v4l2_standard __user *p64, |
444 | struct v4l2_standard32 __user *p32) | |
cf664a64 | 445 | { |
96d4f267 | 446 | if (!access_ok(p32, sizeof(*p32)) || |
6dd0394f MCC |
447 | assign_in_user(&p32->index, &p64->index) || |
448 | assign_in_user(&p32->id, &p64->id) || | |
449 | copy_in_user(p32->name, p64->name, sizeof(p32->name)) || | |
450 | copy_in_user(&p32->frameperiod, &p64->frameperiod, | |
451 | sizeof(p32->frameperiod)) || | |
452 | assign_in_user(&p32->framelines, &p64->framelines) || | |
453 | copy_in_user(p32->reserved, p64->reserved, sizeof(p32->reserved))) | |
b7b957d4 | 454 | return -EFAULT; |
a113bc78 GM |
455 | return 0; |
456 | } | |
457 | ||
52a3082f PO |
458 | struct v4l2_plane32 { |
459 | __u32 bytesused; | |
460 | __u32 length; | |
461 | union { | |
462 | __u32 mem_offset; | |
463 | compat_long_t userptr; | |
051c7788 | 464 | __s32 fd; |
52a3082f PO |
465 | } m; |
466 | __u32 data_offset; | |
467 | __u32 reserved[11]; | |
468 | }; | |
469 | ||
d1f81da2 | 470 | struct v4l2_buffer32 { |
cf664a64 | 471 | __u32 index; |
6016af82 | 472 | __u32 type; /* enum v4l2_buf_type */ |
cf664a64 PDM |
473 | __u32 bytesused; |
474 | __u32 flags; | |
6016af82 | 475 | __u32 field; /* enum v4l2_field */ |
cf664a64 PDM |
476 | struct compat_timeval timestamp; |
477 | struct v4l2_timecode timecode; | |
478 | __u32 sequence; | |
479 | ||
480 | /* memory location */ | |
6016af82 | 481 | __u32 memory; /* enum v4l2_memory */ |
cf664a64 PDM |
482 | union { |
483 | __u32 offset; | |
484 | compat_long_t userptr; | |
52a3082f | 485 | compat_caddr_t planes; |
051c7788 | 486 | __s32 fd; |
cf664a64 PDM |
487 | } m; |
488 | __u32 length; | |
2b719d7b | 489 | __u32 reserved2; |
62fed26f | 490 | __s32 request_fd; |
cf664a64 PDM |
491 | }; |
492 | ||
6dd0394f MCC |
493 | static int get_v4l2_plane32(struct v4l2_plane __user *p64, |
494 | struct v4l2_plane32 __user *p32, | |
b7b957d4 | 495 | enum v4l2_memory memory) |
52a3082f | 496 | { |
a1dfb4c4 | 497 | compat_ulong_t p; |
52a3082f | 498 | |
6dd0394f MCC |
499 | if (copy_in_user(p64, p32, 2 * sizeof(__u32)) || |
500 | copy_in_user(&p64->data_offset, &p32->data_offset, | |
501 | sizeof(p64->data_offset))) | |
52a3082f PO |
502 | return -EFAULT; |
503 | ||
8ed5a59d HV |
504 | switch (memory) { |
505 | case V4L2_MEMORY_MMAP: | |
506 | case V4L2_MEMORY_OVERLAY: | |
6dd0394f MCC |
507 | if (copy_in_user(&p64->m.mem_offset, &p32->m.mem_offset, |
508 | sizeof(p32->m.mem_offset))) | |
8ed5a59d HV |
509 | return -EFAULT; |
510 | break; | |
511 | case V4L2_MEMORY_USERPTR: | |
6dd0394f MCC |
512 | if (get_user(p, &p32->m.userptr) || |
513 | put_user((unsigned long)compat_ptr(p), &p64->m.userptr)) | |
52a3082f | 514 | return -EFAULT; |
8ed5a59d HV |
515 | break; |
516 | case V4L2_MEMORY_DMABUF: | |
6dd0394f | 517 | if (copy_in_user(&p64->m.fd, &p32->m.fd, sizeof(p32->m.fd))) |
051c7788 | 518 | return -EFAULT; |
8ed5a59d | 519 | break; |
52a3082f PO |
520 | } |
521 | ||
522 | return 0; | |
523 | } | |
524 | ||
6dd0394f MCC |
525 | static int put_v4l2_plane32(struct v4l2_plane __user *p64, |
526 | struct v4l2_plane32 __user *p32, | |
b7b957d4 | 527 | enum v4l2_memory memory) |
52a3082f | 528 | { |
8ed5a59d HV |
529 | unsigned long p; |
530 | ||
6dd0394f MCC |
531 | if (copy_in_user(p32, p64, 2 * sizeof(__u32)) || |
532 | copy_in_user(&p32->data_offset, &p64->data_offset, | |
533 | sizeof(p64->data_offset))) | |
52a3082f PO |
534 | return -EFAULT; |
535 | ||
8ed5a59d HV |
536 | switch (memory) { |
537 | case V4L2_MEMORY_MMAP: | |
538 | case V4L2_MEMORY_OVERLAY: | |
6dd0394f MCC |
539 | if (copy_in_user(&p32->m.mem_offset, &p64->m.mem_offset, |
540 | sizeof(p64->m.mem_offset))) | |
52a3082f | 541 | return -EFAULT; |
8ed5a59d HV |
542 | break; |
543 | case V4L2_MEMORY_USERPTR: | |
6dd0394f | 544 | if (get_user(p, &p64->m.userptr) || |
fef6cc6b | 545 | put_user((compat_ulong_t)ptr_to_compat((void __user *)p), |
6dd0394f | 546 | &p32->m.userptr)) |
8ed5a59d HV |
547 | return -EFAULT; |
548 | break; | |
549 | case V4L2_MEMORY_DMABUF: | |
6dd0394f | 550 | if (copy_in_user(&p32->m.fd, &p64->m.fd, sizeof(p64->m.fd))) |
051c7788 | 551 | return -EFAULT; |
8ed5a59d HV |
552 | break; |
553 | } | |
52a3082f PO |
554 | |
555 | return 0; | |
556 | } | |
557 | ||
6dd0394f | 558 | static int bufsize_v4l2_buffer(struct v4l2_buffer32 __user *p32, u32 *size) |
a1dfb4c4 DM |
559 | { |
560 | u32 type; | |
561 | u32 length; | |
562 | ||
96d4f267 | 563 | if (!access_ok(p32, sizeof(*p32)) || |
6dd0394f MCC |
564 | get_user(type, &p32->type) || |
565 | get_user(length, &p32->length)) | |
a1dfb4c4 DM |
566 | return -EFAULT; |
567 | ||
568 | if (V4L2_TYPE_IS_MULTIPLANAR(type)) { | |
569 | if (length > VIDEO_MAX_PLANES) | |
570 | return -EINVAL; | |
571 | ||
572 | /* | |
573 | * We don't really care if userspace decides to kill itself | |
574 | * by passing a very big length value | |
575 | */ | |
576 | *size = length * sizeof(struct v4l2_plane); | |
577 | } else { | |
578 | *size = 0; | |
579 | } | |
580 | return 0; | |
581 | } | |
582 | ||
6dd0394f MCC |
583 | static int get_v4l2_buffer32(struct v4l2_buffer __user *p64, |
584 | struct v4l2_buffer32 __user *p32, | |
a1dfb4c4 | 585 | void __user *aux_buf, u32 aux_space) |
cf664a64 | 586 | { |
a1dfb4c4 DM |
587 | u32 type; |
588 | u32 length; | |
62fed26f | 589 | s32 request_fd; |
a1dfb4c4 | 590 | enum v4l2_memory memory; |
52a3082f PO |
591 | struct v4l2_plane32 __user *uplane32; |
592 | struct v4l2_plane __user *uplane; | |
593 | compat_caddr_t p; | |
52a3082f | 594 | int ret; |
cf664a64 | 595 | |
96d4f267 | 596 | if (!access_ok(p32, sizeof(*p32)) || |
6dd0394f MCC |
597 | assign_in_user(&p64->index, &p32->index) || |
598 | get_user(type, &p32->type) || | |
599 | put_user(type, &p64->type) || | |
600 | assign_in_user(&p64->flags, &p32->flags) || | |
601 | get_user(memory, &p32->memory) || | |
602 | put_user(memory, &p64->memory) || | |
603 | get_user(length, &p32->length) || | |
62fed26f HV |
604 | put_user(length, &p64->length) || |
605 | get_user(request_fd, &p32->request_fd) || | |
606 | put_user(request_fd, &p64->request_fd)) | |
b7b957d4 | 607 | return -EFAULT; |
52a3082f | 608 | |
a1dfb4c4 | 609 | if (V4L2_TYPE_IS_OUTPUT(type)) |
6dd0394f MCC |
610 | if (assign_in_user(&p64->bytesused, &p32->bytesused) || |
611 | assign_in_user(&p64->field, &p32->field) || | |
612 | assign_in_user(&p64->timestamp.tv_sec, | |
613 | &p32->timestamp.tv_sec) || | |
614 | assign_in_user(&p64->timestamp.tv_usec, | |
615 | &p32->timestamp.tv_usec)) | |
22c859fa | 616 | return -EFAULT; |
cf664a64 | 617 | |
a1dfb4c4 DM |
618 | if (V4L2_TYPE_IS_MULTIPLANAR(type)) { |
619 | u32 num_planes = length; | |
a56bc171 | 620 | |
a1dfb4c4 DM |
621 | if (num_planes == 0) { |
622 | /* | |
623 | * num_planes == 0 is legal, e.g. when userspace doesn't | |
624 | * need planes array on DQBUF | |
625 | */ | |
6dd0394f | 626 | return put_user(NULL, &p64->m.planes); |
cf664a64 | 627 | } |
a1dfb4c4 DM |
628 | if (num_planes > VIDEO_MAX_PLANES) |
629 | return -EINVAL; | |
52a3082f | 630 | |
6dd0394f | 631 | if (get_user(p, &p32->m.planes)) |
a113bc78 | 632 | return -EFAULT; |
52a3082f PO |
633 | |
634 | uplane32 = compat_ptr(p); | |
96d4f267 | 635 | if (!access_ok(uplane32, |
a1dfb4c4 | 636 | num_planes * sizeof(*uplane32))) |
52a3082f PO |
637 | return -EFAULT; |
638 | ||
a1dfb4c4 DM |
639 | /* |
640 | * We don't really care if userspace decides to kill itself | |
641 | * by passing a very big num_planes value | |
642 | */ | |
643 | if (aux_space < num_planes * sizeof(*uplane)) | |
644 | return -EFAULT; | |
52a3082f | 645 | |
a1dfb4c4 | 646 | uplane = aux_buf; |
09c033b6 | 647 | if (put_user_force(uplane, &p64->m.planes)) |
a1dfb4c4 DM |
648 | return -EFAULT; |
649 | ||
650 | while (num_planes--) { | |
651 | ret = get_v4l2_plane32(uplane, uplane32, memory); | |
52a3082f PO |
652 | if (ret) |
653 | return ret; | |
a1dfb4c4 DM |
654 | uplane++; |
655 | uplane32++; | |
52a3082f PO |
656 | } |
657 | } else { | |
a1dfb4c4 | 658 | switch (memory) { |
52a3082f | 659 | case V4L2_MEMORY_MMAP: |
8ed5a59d | 660 | case V4L2_MEMORY_OVERLAY: |
6dd0394f | 661 | if (assign_in_user(&p64->m.offset, &p32->m.offset)) |
52a3082f PO |
662 | return -EFAULT; |
663 | break; | |
a1dfb4c4 DM |
664 | case V4L2_MEMORY_USERPTR: { |
665 | compat_ulong_t userptr; | |
52a3082f | 666 | |
6dd0394f | 667 | if (get_user(userptr, &p32->m.userptr) || |
a1dfb4c4 | 668 | put_user((unsigned long)compat_ptr(userptr), |
6dd0394f | 669 | &p64->m.userptr)) |
a1dfb4c4 | 670 | return -EFAULT; |
52a3082f | 671 | break; |
a1dfb4c4 | 672 | } |
051c7788 | 673 | case V4L2_MEMORY_DMABUF: |
6dd0394f | 674 | if (assign_in_user(&p64->m.fd, &p32->m.fd)) |
051c7788 SS |
675 | return -EFAULT; |
676 | break; | |
52a3082f | 677 | } |
cf664a64 | 678 | } |
52a3082f | 679 | |
cf664a64 PDM |
680 | return 0; |
681 | } | |
682 | ||
6dd0394f MCC |
683 | static int put_v4l2_buffer32(struct v4l2_buffer __user *p64, |
684 | struct v4l2_buffer32 __user *p32) | |
cf664a64 | 685 | { |
a1dfb4c4 DM |
686 | u32 type; |
687 | u32 length; | |
688 | enum v4l2_memory memory; | |
52a3082f | 689 | struct v4l2_plane32 __user *uplane32; |
fef6cc6b | 690 | struct v4l2_plane *uplane; |
52a3082f | 691 | compat_caddr_t p; |
52a3082f PO |
692 | int ret; |
693 | ||
96d4f267 | 694 | if (!access_ok(p32, sizeof(*p32)) || |
6dd0394f MCC |
695 | assign_in_user(&p32->index, &p64->index) || |
696 | get_user(type, &p64->type) || | |
697 | put_user(type, &p32->type) || | |
698 | assign_in_user(&p32->flags, &p64->flags) || | |
699 | get_user(memory, &p64->memory) || | |
700 | put_user(memory, &p32->memory)) | |
b7b957d4 | 701 | return -EFAULT; |
52a3082f | 702 | |
6dd0394f MCC |
703 | if (assign_in_user(&p32->bytesused, &p64->bytesused) || |
704 | assign_in_user(&p32->field, &p64->field) || | |
705 | assign_in_user(&p32->timestamp.tv_sec, &p64->timestamp.tv_sec) || | |
706 | assign_in_user(&p32->timestamp.tv_usec, &p64->timestamp.tv_usec) || | |
707 | copy_in_user(&p32->timecode, &p64->timecode, sizeof(p64->timecode)) || | |
708 | assign_in_user(&p32->sequence, &p64->sequence) || | |
709 | assign_in_user(&p32->reserved2, &p64->reserved2) || | |
62fed26f | 710 | assign_in_user(&p32->request_fd, &p64->request_fd) || |
6dd0394f MCC |
711 | get_user(length, &p64->length) || |
712 | put_user(length, &p32->length)) | |
b7b957d4 | 713 | return -EFAULT; |
52a3082f | 714 | |
a1dfb4c4 DM |
715 | if (V4L2_TYPE_IS_MULTIPLANAR(type)) { |
716 | u32 num_planes = length; | |
717 | ||
52a3082f PO |
718 | if (num_planes == 0) |
719 | return 0; | |
fef6cc6b MCC |
720 | /* We need to define uplane without __user, even though |
721 | * it does point to data in userspace here. The reason is | |
722 | * that v4l2-ioctl.c copies it from userspace to kernelspace, | |
723 | * so its definition in videodev2.h doesn't have a | |
724 | * __user markup. Defining uplane with __user causes | |
725 | * smatch warnings, so instead declare it without __user | |
726 | * and cast it as a userspace pointer to put_v4l2_plane32(). | |
727 | */ | |
6dd0394f | 728 | if (get_user(uplane, &p64->m.planes)) |
a1dfb4c4 | 729 | return -EFAULT; |
6dd0394f | 730 | if (get_user(p, &p32->m.planes)) |
52a3082f PO |
731 | return -EFAULT; |
732 | uplane32 = compat_ptr(p); | |
733 | ||
a1dfb4c4 | 734 | while (num_planes--) { |
fef6cc6b MCC |
735 | ret = put_v4l2_plane32((void __user *)uplane, |
736 | uplane32, memory); | |
52a3082f PO |
737 | if (ret) |
738 | return ret; | |
739 | ++uplane; | |
740 | ++uplane32; | |
741 | } | |
742 | } else { | |
a1dfb4c4 | 743 | switch (memory) { |
52a3082f | 744 | case V4L2_MEMORY_MMAP: |
8ed5a59d | 745 | case V4L2_MEMORY_OVERLAY: |
6dd0394f | 746 | if (assign_in_user(&p32->m.offset, &p64->m.offset)) |
52a3082f PO |
747 | return -EFAULT; |
748 | break; | |
749 | case V4L2_MEMORY_USERPTR: | |
6dd0394f | 750 | if (assign_in_user(&p32->m.userptr, &p64->m.userptr)) |
52a3082f PO |
751 | return -EFAULT; |
752 | break; | |
051c7788 | 753 | case V4L2_MEMORY_DMABUF: |
6dd0394f | 754 | if (assign_in_user(&p32->m.fd, &p64->m.fd)) |
051c7788 SS |
755 | return -EFAULT; |
756 | break; | |
52a3082f PO |
757 | } |
758 | } | |
759 | ||
cf664a64 PDM |
760 | return 0; |
761 | } | |
762 | ||
d1f81da2 | 763 | struct v4l2_framebuffer32 { |
cf664a64 PDM |
764 | __u32 capability; |
765 | __u32 flags; | |
6e6a8b5a | 766 | compat_caddr_t base; |
d52e2381 LP |
767 | struct { |
768 | __u32 width; | |
769 | __u32 height; | |
770 | __u32 pixelformat; | |
771 | __u32 field; | |
772 | __u32 bytesperline; | |
773 | __u32 sizeimage; | |
774 | __u32 colorspace; | |
775 | __u32 priv; | |
776 | } fmt; | |
cf664a64 PDM |
777 | }; |
778 | ||
6dd0394f MCC |
779 | static int get_v4l2_framebuffer32(struct v4l2_framebuffer __user *p64, |
780 | struct v4l2_framebuffer32 __user *p32) | |
13d133bc | 781 | { |
a1dfb4c4 | 782 | compat_caddr_t tmp; |
13d133bc | 783 | |
96d4f267 | 784 | if (!access_ok(p32, sizeof(*p32)) || |
6dd0394f | 785 | get_user(tmp, &p32->base) || |
09c033b6 | 786 | put_user_force(compat_ptr(tmp), &p64->base) || |
6dd0394f MCC |
787 | assign_in_user(&p64->capability, &p32->capability) || |
788 | assign_in_user(&p64->flags, &p32->flags) || | |
789 | copy_in_user(&p64->fmt, &p32->fmt, sizeof(p64->fmt))) | |
b7b957d4 | 790 | return -EFAULT; |
13d133bc PDM |
791 | return 0; |
792 | } | |
793 | ||
6dd0394f MCC |
794 | static int put_v4l2_framebuffer32(struct v4l2_framebuffer __user *p64, |
795 | struct v4l2_framebuffer32 __user *p32) | |
cf664a64 | 796 | { |
a1dfb4c4 | 797 | void *base; |
cf664a64 | 798 | |
96d4f267 | 799 | if (!access_ok(p32, sizeof(*p32)) || |
6dd0394f MCC |
800 | get_user(base, &p64->base) || |
801 | put_user(ptr_to_compat((void __user *)base), &p32->base) || | |
802 | assign_in_user(&p32->capability, &p64->capability) || | |
803 | assign_in_user(&p32->flags, &p64->flags) || | |
804 | copy_in_user(&p32->fmt, &p64->fmt, sizeof(p64->fmt))) | |
b7b957d4 | 805 | return -EFAULT; |
cf664a64 PDM |
806 | return 0; |
807 | } | |
808 | ||
92f45bad HV |
809 | struct v4l2_input32 { |
810 | __u32 index; /* Which input */ | |
811 | __u8 name[32]; /* Label */ | |
812 | __u32 type; /* Type of input */ | |
813 | __u32 audioset; /* Associated audios (bitfield) */ | |
814 | __u32 tuner; /* Associated tuner */ | |
655e9780 | 815 | compat_u64 std; |
92f45bad | 816 | __u32 status; |
037e0865 HV |
817 | __u32 capabilities; |
818 | __u32 reserved[3]; | |
655e9780 | 819 | }; |
92f45bad | 820 | |
a1dfb4c4 DM |
821 | /* |
822 | * The 64-bit v4l2_input struct has extra padding at the end of the struct. | |
823 | * Otherwise it is identical to the 32-bit version. | |
824 | */ | |
6dd0394f MCC |
825 | static inline int get_v4l2_input32(struct v4l2_input __user *p64, |
826 | struct v4l2_input32 __user *p32) | |
a113bc78 | 827 | { |
6dd0394f | 828 | if (copy_in_user(p64, p32, sizeof(*p32))) |
5b1a43d7 | 829 | return -EFAULT; |
a113bc78 GM |
830 | return 0; |
831 | } | |
832 | ||
6dd0394f MCC |
833 | static inline int put_v4l2_input32(struct v4l2_input __user *p64, |
834 | struct v4l2_input32 __user *p32) | |
a113bc78 | 835 | { |
6dd0394f | 836 | if (copy_in_user(p32, p64, sizeof(*p32))) |
5b1a43d7 | 837 | return -EFAULT; |
a113bc78 GM |
838 | return 0; |
839 | } | |
840 | ||
92f45bad | 841 | struct v4l2_ext_controls32 { |
0f8017be | 842 | __u32 which; |
28c50292 RR |
843 | __u32 count; |
844 | __u32 error_idx; | |
f23317ad AC |
845 | __s32 request_fd; |
846 | __u32 reserved[1]; | |
28c50292 | 847 | compat_caddr_t controls; /* actually struct v4l2_ext_control32 * */ |
eb4eeccc MCC |
848 | }; |
849 | ||
6b5a9492 HV |
850 | struct v4l2_ext_control32 { |
851 | __u32 id; | |
852 | __u32 size; | |
853 | __u32 reserved2[1]; | |
854 | union { | |
855 | __s32 value; | |
856 | __s64 value64; | |
857 | compat_caddr_t string; /* actually char * */ | |
858 | }; | |
859 | } __attribute__ ((packed)); | |
860 | ||
b8c601e8 HV |
861 | /* Return true if this control is a pointer type. */ |
862 | static inline bool ctrl_is_pointer(struct file *file, u32 id) | |
6b5a9492 | 863 | { |
b8c601e8 HV |
864 | struct video_device *vdev = video_devdata(file); |
865 | struct v4l2_fh *fh = NULL; | |
866 | struct v4l2_ctrl_handler *hdl = NULL; | |
867 | struct v4l2_query_ext_ctrl qec = { id }; | |
868 | const struct v4l2_ioctl_ops *ops = vdev->ioctl_ops; | |
869 | ||
870 | if (test_bit(V4L2_FL_USES_V4L2_FH, &vdev->flags)) | |
871 | fh = file->private_data; | |
872 | ||
873 | if (fh && fh->ctrl_handler) | |
874 | hdl = fh->ctrl_handler; | |
875 | else if (vdev->ctrl_handler) | |
876 | hdl = vdev->ctrl_handler; | |
877 | ||
878 | if (hdl) { | |
879 | struct v4l2_ctrl *ctrl = v4l2_ctrl_find(hdl, id); | |
880 | ||
881 | return ctrl && ctrl->is_ptr; | |
fdf82dc2 | 882 | } |
b8c601e8 | 883 | |
273caa26 | 884 | if (!ops || !ops->vidioc_query_ext_ctrl) |
b8c601e8 HV |
885 | return false; |
886 | ||
887 | return !ops->vidioc_query_ext_ctrl(file, fh, &qec) && | |
888 | (qec.flags & V4L2_CTRL_FLAG_HAS_PAYLOAD); | |
6b5a9492 HV |
889 | } |
890 | ||
6dd0394f | 891 | static int bufsize_v4l2_ext_controls(struct v4l2_ext_controls32 __user *p32, |
a1dfb4c4 DM |
892 | u32 *size) |
893 | { | |
894 | u32 count; | |
895 | ||
96d4f267 | 896 | if (!access_ok(p32, sizeof(*p32)) || |
6dd0394f | 897 | get_user(count, &p32->count)) |
a1dfb4c4 DM |
898 | return -EFAULT; |
899 | if (count > V4L2_CID_MAX_CTRLS) | |
900 | return -EINVAL; | |
901 | *size = count * sizeof(struct v4l2_ext_control); | |
902 | return 0; | |
903 | } | |
904 | ||
b8c601e8 | 905 | static int get_v4l2_ext_controls32(struct file *file, |
6dd0394f MCC |
906 | struct v4l2_ext_controls __user *p64, |
907 | struct v4l2_ext_controls32 __user *p32, | |
a1dfb4c4 | 908 | void __user *aux_buf, u32 aux_space) |
eb4eeccc | 909 | { |
6b5a9492 | 910 | struct v4l2_ext_control32 __user *ucontrols; |
92f45bad | 911 | struct v4l2_ext_control __user *kcontrols; |
a1dfb4c4 DM |
912 | u32 count; |
913 | u32 n; | |
92f45bad HV |
914 | compat_caddr_t p; |
915 | ||
96d4f267 | 916 | if (!access_ok(p32, sizeof(*p32)) || |
6dd0394f MCC |
917 | assign_in_user(&p64->which, &p32->which) || |
918 | get_user(count, &p32->count) || | |
919 | put_user(count, &p64->count) || | |
920 | assign_in_user(&p64->error_idx, &p32->error_idx) || | |
f23317ad | 921 | assign_in_user(&p64->request_fd, &p32->request_fd) || |
6dd0394f | 922 | copy_in_user(p64->reserved, p32->reserved, sizeof(p64->reserved))) |
b7b957d4 | 923 | return -EFAULT; |
a1dfb4c4 DM |
924 | |
925 | if (count == 0) | |
6dd0394f | 926 | return put_user(NULL, &p64->controls); |
a1dfb4c4 | 927 | if (count > V4L2_CID_MAX_CTRLS) |
a56bc171 | 928 | return -EINVAL; |
6dd0394f | 929 | if (get_user(p, &p32->controls)) |
92f45bad HV |
930 | return -EFAULT; |
931 | ucontrols = compat_ptr(p); | |
96d4f267 | 932 | if (!access_ok(ucontrols, count * sizeof(*ucontrols))) |
92f45bad | 933 | return -EFAULT; |
a1dfb4c4 DM |
934 | if (aux_space < count * sizeof(*kcontrols)) |
935 | return -EFAULT; | |
936 | kcontrols = aux_buf; | |
09c033b6 | 937 | if (put_user_force(kcontrols, &p64->controls)) |
a1dfb4c4 DM |
938 | return -EFAULT; |
939 | ||
940 | for (n = 0; n < count; n++) { | |
8ae632b1 HV |
941 | u32 id; |
942 | ||
52a3082f | 943 | if (copy_in_user(kcontrols, ucontrols, sizeof(*ucontrols))) |
92f45bad | 944 | return -EFAULT; |
a1dfb4c4 | 945 | |
8ae632b1 HV |
946 | if (get_user(id, &kcontrols->id)) |
947 | return -EFAULT; | |
a1dfb4c4 | 948 | |
b8c601e8 | 949 | if (ctrl_is_pointer(file, id)) { |
6b5a9492 HV |
950 | void __user *s; |
951 | ||
952 | if (get_user(p, &ucontrols->string)) | |
953 | return -EFAULT; | |
954 | s = compat_ptr(p); | |
955 | if (put_user(s, &kcontrols->string)) | |
956 | return -EFAULT; | |
957 | } | |
92f45bad HV |
958 | ucontrols++; |
959 | kcontrols++; | |
960 | } | |
eb4eeccc MCC |
961 | return 0; |
962 | } | |
963 | ||
b8c601e8 | 964 | static int put_v4l2_ext_controls32(struct file *file, |
6dd0394f MCC |
965 | struct v4l2_ext_controls __user *p64, |
966 | struct v4l2_ext_controls32 __user *p32) | |
0d0fbf81 | 967 | { |
6b5a9492 | 968 | struct v4l2_ext_control32 __user *ucontrols; |
fef6cc6b | 969 | struct v4l2_ext_control *kcontrols; |
a1dfb4c4 DM |
970 | u32 count; |
971 | u32 n; | |
92f45bad HV |
972 | compat_caddr_t p; |
973 | ||
fef6cc6b MCC |
974 | /* |
975 | * We need to define kcontrols without __user, even though it does | |
976 | * point to data in userspace here. The reason is that v4l2-ioctl.c | |
977 | * copies it from userspace to kernelspace, so its definition in | |
978 | * videodev2.h doesn't have a __user markup. Defining kcontrols | |
979 | * with __user causes smatch warnings, so instead declare it | |
980 | * without __user and cast it as a userspace pointer where needed. | |
981 | */ | |
96d4f267 | 982 | if (!access_ok(p32, sizeof(*p32)) || |
6dd0394f MCC |
983 | assign_in_user(&p32->which, &p64->which) || |
984 | get_user(count, &p64->count) || | |
985 | put_user(count, &p32->count) || | |
986 | assign_in_user(&p32->error_idx, &p64->error_idx) || | |
f23317ad | 987 | assign_in_user(&p32->request_fd, &p64->request_fd) || |
6dd0394f MCC |
988 | copy_in_user(p32->reserved, p64->reserved, sizeof(p32->reserved)) || |
989 | get_user(kcontrols, &p64->controls)) | |
b7b957d4 | 990 | return -EFAULT; |
a113bc78 | 991 | |
ea72fbf5 | 992 | if (!count || count > (U32_MAX/sizeof(*ucontrols))) |
a1dfb4c4 | 993 | return 0; |
6dd0394f | 994 | if (get_user(p, &p32->controls)) |
0d0fbf81 | 995 | return -EFAULT; |
92f45bad | 996 | ucontrols = compat_ptr(p); |
96d4f267 | 997 | if (!access_ok(ucontrols, count * sizeof(*ucontrols))) |
0d0fbf81 AB |
998 | return -EFAULT; |
999 | ||
a1dfb4c4 DM |
1000 | for (n = 0; n < count; n++) { |
1001 | unsigned int size = sizeof(*ucontrols); | |
8ae632b1 | 1002 | u32 id; |
6b5a9492 | 1003 | |
09c033b6 | 1004 | if (get_user_cast(id, &kcontrols->id) || |
a1dfb4c4 | 1005 | put_user(id, &ucontrols->id) || |
09c033b6 | 1006 | assign_in_user_cast(&ucontrols->size, &kcontrols->size) || |
fef6cc6b MCC |
1007 | copy_in_user(&ucontrols->reserved2, |
1008 | (void __user *)&kcontrols->reserved2, | |
a1dfb4c4 | 1009 | sizeof(ucontrols->reserved2))) |
8ae632b1 | 1010 | return -EFAULT; |
a1dfb4c4 DM |
1011 | |
1012 | /* | |
1013 | * Do not modify the pointer when copying a pointer control. | |
1014 | * The contents of the pointer was changed, not the pointer | |
1015 | * itself. | |
1016 | */ | |
b8c601e8 | 1017 | if (ctrl_is_pointer(file, id)) |
6b5a9492 | 1018 | size -= sizeof(ucontrols->value64); |
a1dfb4c4 | 1019 | |
fef6cc6b MCC |
1020 | if (copy_in_user(ucontrols, |
1021 | (void __user *)kcontrols, size)) | |
92f45bad | 1022 | return -EFAULT; |
a1dfb4c4 | 1023 | |
92f45bad HV |
1024 | ucontrols++; |
1025 | kcontrols++; | |
0d0fbf81 | 1026 | } |
92f45bad | 1027 | return 0; |
0d0fbf81 | 1028 | } |
92f45bad | 1029 | |
2330fb82 HV |
1030 | struct v4l2_event32 { |
1031 | __u32 type; | |
1032 | union { | |
655e9780 | 1033 | compat_s64 value64; |
2330fb82 HV |
1034 | __u8 data[64]; |
1035 | } u; | |
1036 | __u32 pending; | |
1037 | __u32 sequence; | |
1038 | struct compat_timespec timestamp; | |
1039 | __u32 id; | |
1040 | __u32 reserved[8]; | |
1041 | }; | |
1042 | ||
6dd0394f MCC |
1043 | static int put_v4l2_event32(struct v4l2_event __user *p64, |
1044 | struct v4l2_event32 __user *p32) | |
2330fb82 | 1045 | { |
96d4f267 | 1046 | if (!access_ok(p32, sizeof(*p32)) || |
6dd0394f MCC |
1047 | assign_in_user(&p32->type, &p64->type) || |
1048 | copy_in_user(&p32->u, &p64->u, sizeof(p64->u)) || | |
1049 | assign_in_user(&p32->pending, &p64->pending) || | |
1050 | assign_in_user(&p32->sequence, &p64->sequence) || | |
1051 | assign_in_user(&p32->timestamp.tv_sec, &p64->timestamp.tv_sec) || | |
1052 | assign_in_user(&p32->timestamp.tv_nsec, &p64->timestamp.tv_nsec) || | |
1053 | assign_in_user(&p32->id, &p64->id) || | |
1054 | copy_in_user(p32->reserved, p64->reserved, sizeof(p32->reserved))) | |
b7b957d4 | 1055 | return -EFAULT; |
2330fb82 HV |
1056 | return 0; |
1057 | } | |
1058 | ||
dd519bb3 | 1059 | struct v4l2_edid32 { |
ed45ce2c HV |
1060 | __u32 pad; |
1061 | __u32 start_block; | |
1062 | __u32 blocks; | |
1063 | __u32 reserved[5]; | |
1064 | compat_caddr_t edid; | |
1065 | }; | |
1066 | ||
6dd0394f MCC |
1067 | static int get_v4l2_edid32(struct v4l2_edid __user *p64, |
1068 | struct v4l2_edid32 __user *p32) | |
ed45ce2c | 1069 | { |
a1dfb4c4 | 1070 | compat_uptr_t tmp; |
ed45ce2c | 1071 | |
96d4f267 | 1072 | if (!access_ok(p32, sizeof(*p32)) || |
6dd0394f MCC |
1073 | assign_in_user(&p64->pad, &p32->pad) || |
1074 | assign_in_user(&p64->start_block, &p32->start_block) || | |
09c033b6 | 1075 | assign_in_user_cast(&p64->blocks, &p32->blocks) || |
6dd0394f | 1076 | get_user(tmp, &p32->edid) || |
09c033b6 | 1077 | put_user_force(compat_ptr(tmp), &p64->edid) || |
6dd0394f | 1078 | copy_in_user(p64->reserved, p32->reserved, sizeof(p64->reserved))) |
b7b957d4 | 1079 | return -EFAULT; |
ed45ce2c HV |
1080 | return 0; |
1081 | } | |
1082 | ||
6dd0394f MCC |
1083 | static int put_v4l2_edid32(struct v4l2_edid __user *p64, |
1084 | struct v4l2_edid32 __user *p32) | |
ed45ce2c | 1085 | { |
a1dfb4c4 | 1086 | void *edid; |
ed45ce2c | 1087 | |
96d4f267 | 1088 | if (!access_ok(p32, sizeof(*p32)) || |
6dd0394f MCC |
1089 | assign_in_user(&p32->pad, &p64->pad) || |
1090 | assign_in_user(&p32->start_block, &p64->start_block) || | |
1091 | assign_in_user(&p32->blocks, &p64->blocks) || | |
1092 | get_user(edid, &p64->edid) || | |
1093 | put_user(ptr_to_compat((void __user *)edid), &p32->edid) || | |
1094 | copy_in_user(p32->reserved, p64->reserved, sizeof(p32->reserved))) | |
b7b957d4 | 1095 | return -EFAULT; |
ed45ce2c HV |
1096 | return 0; |
1097 | } | |
1098 | ||
1d338b86 MCC |
1099 | /* |
1100 | * List of ioctls that require 32-bits/64-bits conversion | |
1101 | * | |
1102 | * The V4L2 ioctls that aren't listed there don't have pointer arguments | |
1103 | * and the struct size is identical for both 32 and 64 bits versions, so | |
1104 | * they don't need translations. | |
1105 | */ | |
ed45ce2c | 1106 | |
92f45bad HV |
1107 | #define VIDIOC_G_FMT32 _IOWR('V', 4, struct v4l2_format32) |
1108 | #define VIDIOC_S_FMT32 _IOWR('V', 5, struct v4l2_format32) | |
1109 | #define VIDIOC_QUERYBUF32 _IOWR('V', 9, struct v4l2_buffer32) | |
1110 | #define VIDIOC_G_FBUF32 _IOR ('V', 10, struct v4l2_framebuffer32) | |
1111 | #define VIDIOC_S_FBUF32 _IOW ('V', 11, struct v4l2_framebuffer32) | |
1112 | #define VIDIOC_QBUF32 _IOWR('V', 15, struct v4l2_buffer32) | |
1113 | #define VIDIOC_DQBUF32 _IOWR('V', 17, struct v4l2_buffer32) | |
1114 | #define VIDIOC_ENUMSTD32 _IOWR('V', 25, struct v4l2_standard32) | |
1115 | #define VIDIOC_ENUMINPUT32 _IOWR('V', 26, struct v4l2_input32) | |
dd519bb3 HV |
1116 | #define VIDIOC_G_EDID32 _IOWR('V', 40, struct v4l2_edid32) |
1117 | #define VIDIOC_S_EDID32 _IOWR('V', 41, struct v4l2_edid32) | |
6e6a8b5a | 1118 | #define VIDIOC_TRY_FMT32 _IOWR('V', 64, struct v4l2_format32) |
92f45bad HV |
1119 | #define VIDIOC_G_EXT_CTRLS32 _IOWR('V', 71, struct v4l2_ext_controls32) |
1120 | #define VIDIOC_S_EXT_CTRLS32 _IOWR('V', 72, struct v4l2_ext_controls32) | |
1121 | #define VIDIOC_TRY_EXT_CTRLS32 _IOWR('V', 73, struct v4l2_ext_controls32) | |
2330fb82 | 1122 | #define VIDIOC_DQEVENT32 _IOR ('V', 89, struct v4l2_event32) |
2150158b GL |
1123 | #define VIDIOC_CREATE_BUFS32 _IOWR('V', 92, struct v4l2_create_buffers32) |
1124 | #define VIDIOC_PREPARE_BUF32 _IOWR('V', 93, struct v4l2_buffer32) | |
92f45bad HV |
1125 | |
1126 | #define VIDIOC_OVERLAY32 _IOW ('V', 14, s32) | |
92f45bad HV |
1127 | #define VIDIOC_STREAMON32 _IOW ('V', 18, s32) |
1128 | #define VIDIOC_STREAMOFF32 _IOW ('V', 19, s32) | |
1129 | #define VIDIOC_G_INPUT32 _IOR ('V', 38, s32) | |
1130 | #define VIDIOC_S_INPUT32 _IOWR('V', 39, s32) | |
1131 | #define VIDIOC_G_OUTPUT32 _IOR ('V', 46, s32) | |
1132 | #define VIDIOC_S_OUTPUT32 _IOWR('V', 47, s32) | |
0d0fbf81 | 1133 | |
1d338b86 MCC |
1134 | /** |
1135 | * alloc_userspace() - Allocates a 64-bits userspace pointer compatible | |
1136 | * for calling the native 64-bits version of an ioctl. | |
1137 | * | |
1138 | * @size: size of the structure itself to be allocated. | |
1139 | * @aux_space: extra size needed to store "extra" data, e.g. space for | |
1140 | * other __user data that is pointed to fields inside the | |
1141 | * structure. | |
1142 | * @new_p64: pointer to a pointer to be filled with the allocated struct. | |
1143 | * | |
1144 | * Return: | |
1145 | * | |
1146 | * if it can't allocate memory, either -ENOMEM or -EFAULT will be returned. | |
1147 | * Zero otherwise. | |
1148 | */ | |
a1dfb4c4 | 1149 | static int alloc_userspace(unsigned int size, u32 aux_space, |
6dd0394f | 1150 | void __user **new_p64) |
a1dfb4c4 | 1151 | { |
6dd0394f MCC |
1152 | *new_p64 = compat_alloc_user_space(size + aux_space); |
1153 | if (!*new_p64) | |
a1dfb4c4 | 1154 | return -ENOMEM; |
6dd0394f | 1155 | if (clear_user(*new_p64, size)) |
a1dfb4c4 DM |
1156 | return -EFAULT; |
1157 | return 0; | |
1158 | } | |
1159 | ||
1d338b86 MCC |
1160 | /** |
1161 | * do_video_ioctl() - Ancillary function with handles a compat32 ioctl call | |
1162 | * | |
1163 | * @file: pointer to &struct file with the file handler | |
1164 | * @cmd: ioctl to be called | |
1165 | * @arg: arguments passed from/to the ioctl handler | |
1166 | * | |
1167 | * This function is called when a 32 bits application calls a V4L2 ioctl | |
1168 | * and the Kernel is compiled with 64 bits. | |
1169 | * | |
1170 | * This function is called by v4l2_compat_ioctl32() when the function is | |
1171 | * not private to some specific driver. | |
1172 | * | |
1173 | * It converts a 32-bits struct into a 64 bits one, calls the native 64-bits | |
1174 | * ioctl handler and fills back the 32-bits struct with the results of the | |
1175 | * native call. | |
1176 | */ | |
069b7479 | 1177 | static long do_video_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
0d0fbf81 | 1178 | { |
6dd0394f MCC |
1179 | void __user *p32 = compat_ptr(arg); |
1180 | void __user *new_p64 = NULL; | |
a1dfb4c4 DM |
1181 | void __user *aux_buf; |
1182 | u32 aux_space; | |
cf664a64 | 1183 | int compatible_arg = 1; |
069b7479 | 1184 | long err = 0; |
0d0fbf81 | 1185 | |
1d338b86 MCC |
1186 | /* |
1187 | * 1. When struct size is different, converts the command. | |
1188 | */ | |
d1f81da2 | 1189 | switch (cmd) { |
92f45bad HV |
1190 | case VIDIOC_G_FMT32: cmd = VIDIOC_G_FMT; break; |
1191 | case VIDIOC_S_FMT32: cmd = VIDIOC_S_FMT; break; | |
1192 | case VIDIOC_QUERYBUF32: cmd = VIDIOC_QUERYBUF; break; | |
1193 | case VIDIOC_G_FBUF32: cmd = VIDIOC_G_FBUF; break; | |
1194 | case VIDIOC_S_FBUF32: cmd = VIDIOC_S_FBUF; break; | |
1195 | case VIDIOC_QBUF32: cmd = VIDIOC_QBUF; break; | |
1196 | case VIDIOC_DQBUF32: cmd = VIDIOC_DQBUF; break; | |
1197 | case VIDIOC_ENUMSTD32: cmd = VIDIOC_ENUMSTD; break; | |
1198 | case VIDIOC_ENUMINPUT32: cmd = VIDIOC_ENUMINPUT; break; | |
1199 | case VIDIOC_TRY_FMT32: cmd = VIDIOC_TRY_FMT; break; | |
1200 | case VIDIOC_G_EXT_CTRLS32: cmd = VIDIOC_G_EXT_CTRLS; break; | |
1201 | case VIDIOC_S_EXT_CTRLS32: cmd = VIDIOC_S_EXT_CTRLS; break; | |
1202 | case VIDIOC_TRY_EXT_CTRLS32: cmd = VIDIOC_TRY_EXT_CTRLS; break; | |
2330fb82 | 1203 | case VIDIOC_DQEVENT32: cmd = VIDIOC_DQEVENT; break; |
92f45bad | 1204 | case VIDIOC_OVERLAY32: cmd = VIDIOC_OVERLAY; break; |
92f45bad HV |
1205 | case VIDIOC_STREAMON32: cmd = VIDIOC_STREAMON; break; |
1206 | case VIDIOC_STREAMOFF32: cmd = VIDIOC_STREAMOFF; break; | |
1207 | case VIDIOC_G_INPUT32: cmd = VIDIOC_G_INPUT; break; | |
1208 | case VIDIOC_S_INPUT32: cmd = VIDIOC_S_INPUT; break; | |
1209 | case VIDIOC_G_OUTPUT32: cmd = VIDIOC_G_OUTPUT; break; | |
1210 | case VIDIOC_S_OUTPUT32: cmd = VIDIOC_S_OUTPUT; break; | |
2150158b GL |
1211 | case VIDIOC_CREATE_BUFS32: cmd = VIDIOC_CREATE_BUFS; break; |
1212 | case VIDIOC_PREPARE_BUF32: cmd = VIDIOC_PREPARE_BUF; break; | |
dd519bb3 HV |
1213 | case VIDIOC_G_EDID32: cmd = VIDIOC_G_EDID; break; |
1214 | case VIDIOC_S_EDID32: cmd = VIDIOC_S_EDID; break; | |
92f45bad | 1215 | } |
0d0fbf81 | 1216 | |
1d338b86 MCC |
1217 | /* |
1218 | * 2. Allocates a 64-bits userspace pointer to store the | |
1219 | * values of the ioctl and copy data from the 32-bits __user | |
1220 | * argument into it. | |
1221 | */ | |
d1f81da2 | 1222 | switch (cmd) { |
cf664a64 | 1223 | case VIDIOC_OVERLAY: |
13d133bc PDM |
1224 | case VIDIOC_STREAMON: |
1225 | case VIDIOC_STREAMOFF: | |
92f45bad HV |
1226 | case VIDIOC_S_INPUT: |
1227 | case VIDIOC_S_OUTPUT: | |
6dd0394f MCC |
1228 | err = alloc_userspace(sizeof(unsigned int), 0, &new_p64); |
1229 | if (!err && assign_in_user((unsigned int __user *)new_p64, | |
1230 | (compat_uint_t __user *)p32)) | |
a1dfb4c4 | 1231 | err = -EFAULT; |
92f45bad | 1232 | compatible_arg = 0; |
0d0fbf81 | 1233 | break; |
13d133bc | 1234 | |
92f45bad HV |
1235 | case VIDIOC_G_INPUT: |
1236 | case VIDIOC_G_OUTPUT: | |
6dd0394f | 1237 | err = alloc_userspace(sizeof(unsigned int), 0, &new_p64); |
13d133bc PDM |
1238 | compatible_arg = 0; |
1239 | break; | |
cf664a64 | 1240 | |
dd519bb3 HV |
1241 | case VIDIOC_G_EDID: |
1242 | case VIDIOC_S_EDID: | |
6dd0394f | 1243 | err = alloc_userspace(sizeof(struct v4l2_edid), 0, &new_p64); |
a1dfb4c4 | 1244 | if (!err) |
6dd0394f | 1245 | err = get_v4l2_edid32(new_p64, p32); |
ed45ce2c HV |
1246 | compatible_arg = 0; |
1247 | break; | |
1248 | ||
cf664a64 PDM |
1249 | case VIDIOC_G_FMT: |
1250 | case VIDIOC_S_FMT: | |
1251 | case VIDIOC_TRY_FMT: | |
6dd0394f | 1252 | err = bufsize_v4l2_format(p32, &aux_space); |
a1dfb4c4 DM |
1253 | if (!err) |
1254 | err = alloc_userspace(sizeof(struct v4l2_format), | |
6dd0394f | 1255 | aux_space, &new_p64); |
a1dfb4c4 | 1256 | if (!err) { |
6dd0394f MCC |
1257 | aux_buf = new_p64 + sizeof(struct v4l2_format); |
1258 | err = get_v4l2_format32(new_p64, p32, | |
a1dfb4c4 DM |
1259 | aux_buf, aux_space); |
1260 | } | |
cf664a64 PDM |
1261 | compatible_arg = 0; |
1262 | break; | |
1263 | ||
2150158b | 1264 | case VIDIOC_CREATE_BUFS: |
6dd0394f | 1265 | err = bufsize_v4l2_create(p32, &aux_space); |
a1dfb4c4 DM |
1266 | if (!err) |
1267 | err = alloc_userspace(sizeof(struct v4l2_create_buffers), | |
6dd0394f | 1268 | aux_space, &new_p64); |
a1dfb4c4 | 1269 | if (!err) { |
6dd0394f MCC |
1270 | aux_buf = new_p64 + sizeof(struct v4l2_create_buffers); |
1271 | err = get_v4l2_create32(new_p64, p32, | |
a1dfb4c4 DM |
1272 | aux_buf, aux_space); |
1273 | } | |
2150158b GL |
1274 | compatible_arg = 0; |
1275 | break; | |
1276 | ||
1277 | case VIDIOC_PREPARE_BUF: | |
cf664a64 PDM |
1278 | case VIDIOC_QUERYBUF: |
1279 | case VIDIOC_QBUF: | |
1280 | case VIDIOC_DQBUF: | |
6dd0394f | 1281 | err = bufsize_v4l2_buffer(p32, &aux_space); |
a1dfb4c4 DM |
1282 | if (!err) |
1283 | err = alloc_userspace(sizeof(struct v4l2_buffer), | |
6dd0394f | 1284 | aux_space, &new_p64); |
a1dfb4c4 | 1285 | if (!err) { |
6dd0394f MCC |
1286 | aux_buf = new_p64 + sizeof(struct v4l2_buffer); |
1287 | err = get_v4l2_buffer32(new_p64, p32, | |
a1dfb4c4 DM |
1288 | aux_buf, aux_space); |
1289 | } | |
cf664a64 PDM |
1290 | compatible_arg = 0; |
1291 | break; | |
1292 | ||
92f45bad | 1293 | case VIDIOC_S_FBUF: |
a1dfb4c4 | 1294 | err = alloc_userspace(sizeof(struct v4l2_framebuffer), 0, |
6dd0394f | 1295 | &new_p64); |
a1dfb4c4 | 1296 | if (!err) |
6dd0394f | 1297 | err = get_v4l2_framebuffer32(new_p64, p32); |
a113bc78 GM |
1298 | compatible_arg = 0; |
1299 | break; | |
1300 | ||
92f45bad | 1301 | case VIDIOC_G_FBUF: |
a1dfb4c4 | 1302 | err = alloc_userspace(sizeof(struct v4l2_framebuffer), 0, |
6dd0394f | 1303 | &new_p64); |
cf664a64 PDM |
1304 | compatible_arg = 0; |
1305 | break; | |
1306 | ||
92f45bad | 1307 | case VIDIOC_ENUMSTD: |
a1dfb4c4 | 1308 | err = alloc_userspace(sizeof(struct v4l2_standard), 0, |
6dd0394f | 1309 | &new_p64); |
a1dfb4c4 | 1310 | if (!err) |
6dd0394f | 1311 | err = get_v4l2_standard32(new_p64, p32); |
a113bc78 GM |
1312 | compatible_arg = 0; |
1313 | break; | |
1314 | ||
92f45bad | 1315 | case VIDIOC_ENUMINPUT: |
6dd0394f | 1316 | err = alloc_userspace(sizeof(struct v4l2_input), 0, &new_p64); |
a1dfb4c4 | 1317 | if (!err) |
6dd0394f | 1318 | err = get_v4l2_input32(new_p64, p32); |
a113bc78 GM |
1319 | compatible_arg = 0; |
1320 | break; | |
1321 | ||
92f45bad HV |
1322 | case VIDIOC_G_EXT_CTRLS: |
1323 | case VIDIOC_S_EXT_CTRLS: | |
1324 | case VIDIOC_TRY_EXT_CTRLS: | |
6dd0394f | 1325 | err = bufsize_v4l2_ext_controls(p32, &aux_space); |
a1dfb4c4 DM |
1326 | if (!err) |
1327 | err = alloc_userspace(sizeof(struct v4l2_ext_controls), | |
6dd0394f | 1328 | aux_space, &new_p64); |
a1dfb4c4 | 1329 | if (!err) { |
6dd0394f MCC |
1330 | aux_buf = new_p64 + sizeof(struct v4l2_ext_controls); |
1331 | err = get_v4l2_ext_controls32(file, new_p64, p32, | |
a1dfb4c4 DM |
1332 | aux_buf, aux_space); |
1333 | } | |
a113bc78 GM |
1334 | compatible_arg = 0; |
1335 | break; | |
2330fb82 | 1336 | case VIDIOC_DQEVENT: |
6dd0394f | 1337 | err = alloc_userspace(sizeof(struct v4l2_event), 0, &new_p64); |
2330fb82 HV |
1338 | compatible_arg = 0; |
1339 | break; | |
92f45bad | 1340 | } |
d1f81da2 | 1341 | if (err) |
92f45bad | 1342 | return err; |
0d0fbf81 | 1343 | |
1d338b86 MCC |
1344 | /* |
1345 | * 3. Calls the native 64-bits ioctl handler. | |
1346 | * | |
1347 | * For the functions where a conversion was not needed, | |
1348 | * compatible_arg is true, and it will call it with the arguments | |
1349 | * provided by userspace and stored at @p32 var. | |
1350 | * | |
1351 | * Otherwise, it will pass the newly allocated @new_p64 argument. | |
1352 | */ | |
d1f81da2 | 1353 | if (compatible_arg) |
6dd0394f | 1354 | err = native_ioctl(file, cmd, (unsigned long)p32); |
a1dfb4c4 | 1355 | else |
6dd0394f | 1356 | err = native_ioctl(file, cmd, (unsigned long)new_p64); |
92f45bad | 1357 | |
d83a8243 HV |
1358 | if (err == -ENOTTY) |
1359 | return err; | |
1360 | ||
a1dfb4c4 | 1361 | /* |
1d338b86 MCC |
1362 | * 4. Special case: even after an error we need to put the |
1363 | * results back for some ioctls. | |
1364 | * | |
1365 | * In the case of EXT_CTRLS, the error_idx will contain information | |
1366 | * on which control failed. | |
1367 | * | |
1368 | * In the case of S_EDID, the driver can return E2BIG and set | |
1369 | * the blocks to maximum allowed value. | |
a1dfb4c4 | 1370 | */ |
92f45bad HV |
1371 | switch (cmd) { |
1372 | case VIDIOC_G_EXT_CTRLS: | |
1373 | case VIDIOC_S_EXT_CTRLS: | |
1374 | case VIDIOC_TRY_EXT_CTRLS: | |
6dd0394f | 1375 | if (put_v4l2_ext_controls32(file, new_p64, p32)) |
92f45bad HV |
1376 | err = -EFAULT; |
1377 | break; | |
ba7ed691 | 1378 | case VIDIOC_S_EDID: |
6dd0394f | 1379 | if (put_v4l2_edid32(new_p64, p32)) |
ba7ed691 HV |
1380 | err = -EFAULT; |
1381 | break; | |
92f45bad HV |
1382 | } |
1383 | if (err) | |
1384 | return err; | |
1385 | ||
1d338b86 MCC |
1386 | /* |
1387 | * 5. Copy the data returned at the 64 bits userspace pointer to | |
1388 | * the original 32 bits structure. | |
1389 | */ | |
92f45bad | 1390 | switch (cmd) { |
92f45bad HV |
1391 | case VIDIOC_S_INPUT: |
1392 | case VIDIOC_S_OUTPUT: | |
1393 | case VIDIOC_G_INPUT: | |
1394 | case VIDIOC_G_OUTPUT: | |
6dd0394f MCC |
1395 | if (assign_in_user((compat_uint_t __user *)p32, |
1396 | ((unsigned int __user *)new_p64))) | |
a1dfb4c4 | 1397 | err = -EFAULT; |
92f45bad | 1398 | break; |
a113bc78 | 1399 | |
92f45bad | 1400 | case VIDIOC_G_FBUF: |
6dd0394f | 1401 | err = put_v4l2_framebuffer32(new_p64, p32); |
92f45bad HV |
1402 | break; |
1403 | ||
2330fb82 | 1404 | case VIDIOC_DQEVENT: |
6dd0394f | 1405 | err = put_v4l2_event32(new_p64, p32); |
2330fb82 HV |
1406 | break; |
1407 | ||
dd519bb3 | 1408 | case VIDIOC_G_EDID: |
6dd0394f | 1409 | err = put_v4l2_edid32(new_p64, p32); |
ed45ce2c HV |
1410 | break; |
1411 | ||
92f45bad HV |
1412 | case VIDIOC_G_FMT: |
1413 | case VIDIOC_S_FMT: | |
1414 | case VIDIOC_TRY_FMT: | |
6dd0394f | 1415 | err = put_v4l2_format32(new_p64, p32); |
92f45bad HV |
1416 | break; |
1417 | ||
2150158b | 1418 | case VIDIOC_CREATE_BUFS: |
6dd0394f | 1419 | err = put_v4l2_create32(new_p64, p32); |
2150158b GL |
1420 | break; |
1421 | ||
3ee6d040 | 1422 | case VIDIOC_PREPARE_BUF: |
92f45bad HV |
1423 | case VIDIOC_QUERYBUF: |
1424 | case VIDIOC_QBUF: | |
1425 | case VIDIOC_DQBUF: | |
6dd0394f | 1426 | err = put_v4l2_buffer32(new_p64, p32); |
92f45bad HV |
1427 | break; |
1428 | ||
1429 | case VIDIOC_ENUMSTD: | |
6dd0394f | 1430 | err = put_v4l2_standard32(new_p64, p32); |
92f45bad HV |
1431 | break; |
1432 | ||
1433 | case VIDIOC_ENUMINPUT: | |
6dd0394f | 1434 | err = put_v4l2_input32(new_p64, p32); |
92f45bad | 1435 | break; |
0d0fbf81 | 1436 | } |
0d0fbf81 AB |
1437 | return err; |
1438 | } | |
1439 | ||
1d338b86 MCC |
1440 | /** |
1441 | * v4l2_compat_ioctl32() - Handles a compat32 ioctl call | |
1442 | * | |
1443 | * @file: pointer to &struct file with the file handler | |
1444 | * @cmd: ioctl to be called | |
1445 | * @arg: arguments passed from/to the ioctl handler | |
1446 | * | |
1447 | * This function is meant to be used as .compat_ioctl fops at v4l2-dev.c | |
1448 | * in order to deal with 32-bit calls on a 64-bits Kernel. | |
1449 | * | |
1450 | * This function calls do_video_ioctl() for non-private V4L2 ioctls. | |
1451 | * If the function is a private one it calls vdev->fops->compat_ioctl32 | |
1452 | * instead. | |
1453 | */ | |
9bb7cde7 | 1454 | long v4l2_compat_ioctl32(struct file *file, unsigned int cmd, unsigned long arg) |
0d0fbf81 | 1455 | { |
b9d0aa6e | 1456 | struct video_device *vdev = video_devdata(file); |
069b7479 | 1457 | long ret = -ENOIOCTLCMD; |
0d0fbf81 | 1458 | |
c6d7ba8b | 1459 | if (!file->f_op->unlocked_ioctl) |
0d0fbf81 AB |
1460 | return ret; |
1461 | ||
ab58a301 | 1462 | if (_IOC_TYPE(cmd) == 'V' && _IOC_NR(cmd) < BASE_VIDIOC_PRIVATE) |
0d0fbf81 | 1463 | ret = do_video_ioctl(file, cmd, arg); |
ab58a301 HV |
1464 | else if (vdev->fops->compat_ioctl32) |
1465 | ret = vdev->fops->compat_ioctl32(file, cmd, arg); | |
0d0fbf81 | 1466 | |
ab58a301 | 1467 | if (ret == -ENOIOCTLCMD) |
9ec32cc7 HV |
1468 | pr_debug("compat_ioctl32: unknown ioctl '%c', dir=%d, #%d (0x%08x)\n", |
1469 | _IOC_TYPE(cmd), _IOC_DIR(cmd), _IOC_NR(cmd), cmd); | |
e8efb71d | 1470 | return ret; |
0d0fbf81 | 1471 | } |
9bb7cde7 | 1472 | EXPORT_SYMBOL_GPL(v4l2_compat_ioctl32); |