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1 | #include <linux/blkdev.h> |
2 | #include <linux/blkpg.h> |
3 | #include <linux/blktrace_api.h> |
4 | #include <linux/cdrom.h> |
5 | #include <linux/compat.h> |
6 | #include <linux/elevator.h> |
7 | #include <linux/fd.h> |
8 | #include <linux/hdreg.h> |
9 | #include <linux/slab.h> |
10 | #include <linux/syscalls.h> |
11 | #include <linux/types.h> |
12 | #include <linux/uaccess.h> |
13 | |
14 | static int compat_put_ushort(unsigned long arg, unsigned short val) |
15 | { |
16 | return put_user(val, (unsigned short __user *)compat_ptr(arg)); |
17 | } |
18 | |
19 | static int compat_put_int(unsigned long arg, int val) |
20 | { |
21 | return put_user(val, (compat_int_t __user *)compat_ptr(arg)); |
22 | } |
23 | |
24 | static int compat_put_uint(unsigned long arg, unsigned int val) |
25 | { |
26 | return put_user(val, (compat_uint_t __user *)compat_ptr(arg)); |
27 | } |
28 | |
29 | static int compat_put_long(unsigned long arg, long val) |
30 | { |
31 | return put_user(val, (compat_long_t __user *)compat_ptr(arg)); |
32 | } |
33 | |
34 | static int compat_put_ulong(unsigned long arg, compat_ulong_t val) |
35 | { |
36 | return put_user(val, (compat_ulong_t __user *)compat_ptr(arg)); |
37 | } |
38 | |
39 | static int compat_put_u64(unsigned long arg, u64 val) |
40 | { |
41 | return put_user(val, (compat_u64 __user *)compat_ptr(arg)); |
42 | } |
43 | |
44 | struct compat_hd_geometry { |
45 | unsigned char heads; |
46 | unsigned char sectors; |
47 | unsigned short cylinders; |
48 | u32 start; |
49 | }; |
50 | |
51 | static int compat_hdio_getgeo(struct gendisk *disk, struct block_device *bdev, |
52 | struct compat_hd_geometry __user *ugeo) |
53 | { |
54 | struct hd_geometry geo; |
55 | int ret; |
56 | |
57 | if (!ugeo) |
58 | return -EINVAL; |
59 | if (!disk->fops->getgeo) |
60 | return -ENOTTY; |
61 | |
62 | /* |
63 | * We need to set the startsect first, the driver may |
64 | * want to override it. |
65 | */ |
66 | geo.start = get_start_sect(bdev); |
67 | ret = disk->fops->getgeo(bdev, &geo); |
68 | if (ret) |
69 | return ret; |
70 | |
71 | ret = copy_to_user(ugeo, &geo, 4); |
72 | ret |= __put_user(geo.start, &ugeo->start); |
73 | if (ret) |
74 | ret = -EFAULT; |
75 | |
76 | return ret; |
77 | } |
78 | |
79 | static int compat_hdio_ioctl(struct block_device *bdev, fmode_t mode, |
80 | unsigned int cmd, unsigned long arg) |
81 | { |
82 | mm_segment_t old_fs = get_fs(); |
83 | unsigned long kval; |
84 | unsigned int __user *uvp; |
85 | int error; |
86 | |
87 | set_fs(KERNEL_DS); |
88 | error = __blkdev_driver_ioctl(bdev, mode, |
89 | cmd, (unsigned long)(&kval)); |
90 | set_fs(old_fs); |
91 | |
92 | if (error == 0) { |
93 | uvp = compat_ptr(arg); |
94 | if (put_user(kval, uvp)) |
95 | error = -EFAULT; |
96 | } |
97 | return error; |
98 | } |
99 | |
100 | struct compat_cdrom_read_audio { |
101 | union cdrom_addr addr; |
102 | u8 addr_format; |
103 | compat_int_t nframes; |
104 | compat_caddr_t buf; |
105 | }; |
106 | |
107 | struct compat_cdrom_generic_command { |
108 | unsigned char cmd[CDROM_PACKET_SIZE]; |
109 | compat_caddr_t buffer; |
110 | compat_uint_t buflen; |
111 | compat_int_t stat; |
112 | compat_caddr_t sense; |
113 | unsigned char data_direction; |
114 | compat_int_t quiet; |
115 | compat_int_t timeout; |
116 | compat_caddr_t reserved[1]; |
117 | }; |
118 | |
119 | static int compat_cdrom_read_audio(struct block_device *bdev, fmode_t mode, |
120 | unsigned int cmd, unsigned long arg) |
121 | { |
122 | struct cdrom_read_audio __user *cdread_audio; |
123 | struct compat_cdrom_read_audio __user *cdread_audio32; |
124 | __u32 data; |
125 | void __user *datap; |
126 | |
127 | cdread_audio = compat_alloc_user_space(sizeof(*cdread_audio)); |
128 | cdread_audio32 = compat_ptr(arg); |
129 | |
130 | if (copy_in_user(&cdread_audio->addr, |
131 | &cdread_audio32->addr, |
132 | (sizeof(*cdread_audio32) - |
133 | sizeof(compat_caddr_t)))) |
134 | return -EFAULT; |
135 | |
136 | if (get_user(data, &cdread_audio32->buf)) |
137 | return -EFAULT; |
138 | datap = compat_ptr(data); |
139 | if (put_user(datap, &cdread_audio->buf)) |
140 | return -EFAULT; |
141 | |
142 | return __blkdev_driver_ioctl(bdev, mode, cmd, |
143 | (unsigned long)cdread_audio); |
144 | } |
145 | |
146 | static int compat_cdrom_generic_command(struct block_device *bdev, fmode_t mode, |
147 | unsigned int cmd, unsigned long arg) |
148 | { |
149 | struct cdrom_generic_command __user *cgc; |
150 | struct compat_cdrom_generic_command __user *cgc32; |
151 | u32 data; |
152 | unsigned char dir; |
153 | int itmp; |
154 | |
155 | cgc = compat_alloc_user_space(sizeof(*cgc)); |
156 | cgc32 = compat_ptr(arg); |
157 | |
158 | if (copy_in_user(&cgc->cmd, &cgc32->cmd, sizeof(cgc->cmd)) || |
159 | get_user(data, &cgc32->buffer) || |
160 | put_user(compat_ptr(data), &cgc->buffer) || |
161 | copy_in_user(&cgc->buflen, &cgc32->buflen, |
162 | (sizeof(unsigned int) + sizeof(int))) || |
163 | get_user(data, &cgc32->sense) || |
164 | put_user(compat_ptr(data), &cgc->sense) || |
165 | get_user(dir, &cgc32->data_direction) || |
166 | put_user(dir, &cgc->data_direction) || |
167 | get_user(itmp, &cgc32->quiet) || |
168 | put_user(itmp, &cgc->quiet) || |
169 | get_user(itmp, &cgc32->timeout) || |
170 | put_user(itmp, &cgc->timeout) || |
171 | get_user(data, &cgc32->reserved[0]) || |
172 | put_user(compat_ptr(data), &cgc->reserved[0])) |
173 | return -EFAULT; |
174 | |
175 | return __blkdev_driver_ioctl(bdev, mode, cmd, (unsigned long)cgc); |
176 | } |
177 | |
178 | struct compat_blkpg_ioctl_arg { |
179 | compat_int_t op; |
180 | compat_int_t flags; |
181 | compat_int_t datalen; |
182 | compat_caddr_t data; |
183 | }; |
184 | |
185 | static int compat_blkpg_ioctl(struct block_device *bdev, fmode_t mode, |
186 | unsigned int cmd, struct compat_blkpg_ioctl_arg __user *ua32) |
187 | { |
188 | struct blkpg_ioctl_arg __user *a = compat_alloc_user_space(sizeof(*a)); |
189 | compat_caddr_t udata; |
190 | compat_int_t n; |
191 | int err; |
192 | |
193 | err = get_user(n, &ua32->op); |
194 | err |= put_user(n, &a->op); |
195 | err |= get_user(n, &ua32->flags); |
196 | err |= put_user(n, &a->flags); |
197 | err |= get_user(n, &ua32->datalen); |
198 | err |= put_user(n, &a->datalen); |
199 | err |= get_user(udata, &ua32->data); |
200 | err |= put_user(compat_ptr(udata), &a->data); |
201 | if (err) |
202 | return err; |
203 | |
204 | return blkdev_ioctl(bdev, mode, cmd, (unsigned long)a); |
205 | } |
206 | |
207 | #define BLKBSZGET_32 _IOR(0x12, 112, int) |
208 | #define BLKBSZSET_32 _IOW(0x12, 113, int) |
209 | #define BLKGETSIZE64_32 _IOR(0x12, 114, int) |
210 | |
211 | struct compat_floppy_drive_params { |
212 | char cmos; |
213 | compat_ulong_t max_dtr; |
214 | compat_ulong_t hlt; |
215 | compat_ulong_t hut; |
216 | compat_ulong_t srt; |
217 | compat_ulong_t spinup; |
218 | compat_ulong_t spindown; |
219 | unsigned char spindown_offset; |
220 | unsigned char select_delay; |
221 | unsigned char rps; |
222 | unsigned char tracks; |
223 | compat_ulong_t timeout; |
224 | unsigned char interleave_sect; |
225 | struct floppy_max_errors max_errors; |
226 | char flags; |
227 | char read_track; |
228 | short autodetect[8]; |
229 | compat_int_t checkfreq; |
230 | compat_int_t native_format; |
231 | }; |
232 | |
233 | struct compat_floppy_drive_struct { |
234 | signed char flags; |
235 | compat_ulong_t spinup_date; |
236 | compat_ulong_t select_date; |
237 | compat_ulong_t first_read_date; |
238 | short probed_format; |
239 | short track; |
240 | short maxblock; |
241 | short maxtrack; |
242 | compat_int_t generation; |
243 | compat_int_t keep_data; |
244 | compat_int_t fd_ref; |
245 | compat_int_t fd_device; |
246 | compat_int_t last_checked; |
247 | compat_caddr_t dmabuf; |
248 | compat_int_t bufblocks; |
249 | }; |
250 | |
251 | struct compat_floppy_fdc_state { |
252 | compat_int_t spec1; |
253 | compat_int_t spec2; |
254 | compat_int_t dtr; |
255 | unsigned char version; |
256 | unsigned char dor; |
257 | compat_ulong_t address; |
258 | unsigned int rawcmd:2; |
259 | unsigned int reset:1; |
260 | unsigned int need_configure:1; |
261 | unsigned int perp_mode:2; |
262 | unsigned int has_fifo:1; |
263 | unsigned int driver_version; |
264 | unsigned char track[4]; |
265 | }; |
266 | |
267 | struct compat_floppy_write_errors { |
268 | unsigned int write_errors; |
269 | compat_ulong_t first_error_sector; |
270 | compat_int_t first_error_generation; |
271 | compat_ulong_t last_error_sector; |
272 | compat_int_t last_error_generation; |
273 | compat_uint_t badness; |
274 | }; |
275 | |
276 | #define FDSETPRM32 _IOW(2, 0x42, struct compat_floppy_struct) |
277 | #define FDDEFPRM32 _IOW(2, 0x43, struct compat_floppy_struct) |
278 | #define FDSETDRVPRM32 _IOW(2, 0x90, struct compat_floppy_drive_params) |
279 | #define FDGETDRVPRM32 _IOR(2, 0x11, struct compat_floppy_drive_params) |
280 | #define FDGETDRVSTAT32 _IOR(2, 0x12, struct compat_floppy_drive_struct) |
281 | #define FDPOLLDRVSTAT32 _IOR(2, 0x13, struct compat_floppy_drive_struct) |
282 | #define FDGETFDCSTAT32 _IOR(2, 0x15, struct compat_floppy_fdc_state) |
283 | #define FDWERRORGET32 _IOR(2, 0x17, struct compat_floppy_write_errors) |
284 | |
285 | static struct { |
286 | unsigned int cmd32; |
287 | unsigned int cmd; |
288 | } fd_ioctl_trans_table[] = { |
289 | { FDSETPRM32, FDSETPRM }, |
290 | { FDDEFPRM32, FDDEFPRM }, |
291 | { FDGETPRM32, FDGETPRM }, |
292 | { FDSETDRVPRM32, FDSETDRVPRM }, |
293 | { FDGETDRVPRM32, FDGETDRVPRM }, |
294 | { FDGETDRVSTAT32, FDGETDRVSTAT }, |
295 | { FDPOLLDRVSTAT32, FDPOLLDRVSTAT }, |
296 | { FDGETFDCSTAT32, FDGETFDCSTAT }, |
297 | { FDWERRORGET32, FDWERRORGET } |
298 | }; |
299 | |
300 | #define NR_FD_IOCTL_TRANS ARRAY_SIZE(fd_ioctl_trans_table) |
301 | |
302 | static int compat_fd_ioctl(struct block_device *bdev, fmode_t mode, |
303 | unsigned int cmd, unsigned long arg) |
304 | { |
305 | mm_segment_t old_fs = get_fs(); |
306 | void *karg = NULL; |
307 | unsigned int kcmd = 0; |
308 | int i, err; |
309 | |
310 | for (i = 0; i < NR_FD_IOCTL_TRANS; i++) |
311 | if (cmd == fd_ioctl_trans_table[i].cmd32) { |
312 | kcmd = fd_ioctl_trans_table[i].cmd; |
313 | break; |
314 | } |
315 | if (!kcmd) |
316 | return -EINVAL; |
317 | |
318 | switch (cmd) { |
319 | case FDSETPRM32: |
320 | case FDDEFPRM32: |
321 | case FDGETPRM32: |
322 | { |
323 | compat_uptr_t name; |
324 | struct compat_floppy_struct __user *uf; |
325 | struct floppy_struct *f; |
326 | |
327 | uf = compat_ptr(arg); |
328 | f = karg = kmalloc(sizeof(struct floppy_struct), GFP_KERNEL); |
329 | if (!karg) |
330 | return -ENOMEM; |
331 | if (cmd == FDGETPRM32) |
332 | break; |
333 | err = __get_user(f->size, &uf->size); |
334 | err |= __get_user(f->sect, &uf->sect); |
335 | err |= __get_user(f->head, &uf->head); |
336 | err |= __get_user(f->track, &uf->track); |
337 | err |= __get_user(f->stretch, &uf->stretch); |
338 | err |= __get_user(f->gap, &uf->gap); |
339 | err |= __get_user(f->rate, &uf->rate); |
340 | err |= __get_user(f->spec1, &uf->spec1); |
341 | err |= __get_user(f->fmt_gap, &uf->fmt_gap); |
342 | err |= __get_user(name, &uf->name); |
343 | f->name = compat_ptr(name); |
344 | if (err) { |
345 | err = -EFAULT; |
346 | goto out; |
347 | } |
348 | break; |
349 | } |
350 | case FDSETDRVPRM32: |
351 | case FDGETDRVPRM32: |
352 | { |
353 | struct compat_floppy_drive_params __user *uf; |
354 | struct floppy_drive_params *f; |
355 | |
356 | uf = compat_ptr(arg); |
357 | f = karg = kmalloc(sizeof(struct floppy_drive_params), GFP_KERNEL); |
358 | if (!karg) |
359 | return -ENOMEM; |
360 | if (cmd == FDGETDRVPRM32) |
361 | break; |
362 | err = __get_user(f->cmos, &uf->cmos); |
363 | err |= __get_user(f->max_dtr, &uf->max_dtr); |
364 | err |= __get_user(f->hlt, &uf->hlt); |
365 | err |= __get_user(f->hut, &uf->hut); |
366 | err |= __get_user(f->srt, &uf->srt); |
367 | err |= __get_user(f->spinup, &uf->spinup); |
368 | err |= __get_user(f->spindown, &uf->spindown); |
369 | err |= __get_user(f->spindown_offset, &uf->spindown_offset); |
370 | err |= __get_user(f->select_delay, &uf->select_delay); |
371 | err |= __get_user(f->rps, &uf->rps); |
372 | err |= __get_user(f->tracks, &uf->tracks); |
373 | err |= __get_user(f->timeout, &uf->timeout); |
374 | err |= __get_user(f->interleave_sect, &uf->interleave_sect); |
375 | err |= __copy_from_user(&f->max_errors, &uf->max_errors, sizeof(f->max_errors)); |
376 | err |= __get_user(f->flags, &uf->flags); |
377 | err |= __get_user(f->read_track, &uf->read_track); |
378 | err |= __copy_from_user(f->autodetect, uf->autodetect, sizeof(f->autodetect)); |
379 | err |= __get_user(f->checkfreq, &uf->checkfreq); |
380 | err |= __get_user(f->native_format, &uf->native_format); |
381 | if (err) { |
382 | err = -EFAULT; |
383 | goto out; |
384 | } |
385 | break; |
386 | } |
387 | case FDGETDRVSTAT32: |
388 | case FDPOLLDRVSTAT32: |
389 | karg = kmalloc(sizeof(struct floppy_drive_struct), GFP_KERNEL); |
390 | if (!karg) |
391 | return -ENOMEM; |
392 | break; |
393 | case FDGETFDCSTAT32: |
394 | karg = kmalloc(sizeof(struct floppy_fdc_state), GFP_KERNEL); |
395 | if (!karg) |
396 | return -ENOMEM; |
397 | break; |
398 | case FDWERRORGET32: |
399 | karg = kmalloc(sizeof(struct floppy_write_errors), GFP_KERNEL); |
400 | if (!karg) |
401 | return -ENOMEM; |
402 | break; |
403 | default: |
404 | return -EINVAL; |
405 | } |
406 | set_fs(KERNEL_DS); |
407 | err = __blkdev_driver_ioctl(bdev, mode, kcmd, (unsigned long)karg); |
408 | set_fs(old_fs); |
409 | if (err) |
410 | goto out; |
411 | switch (cmd) { |
412 | case FDGETPRM32: |
413 | { |
414 | struct floppy_struct *f = karg; |
415 | struct compat_floppy_struct __user *uf = compat_ptr(arg); |
416 | |
417 | err = __put_user(f->size, &uf->size); |
418 | err |= __put_user(f->sect, &uf->sect); |
419 | err |= __put_user(f->head, &uf->head); |
420 | err |= __put_user(f->track, &uf->track); |
421 | err |= __put_user(f->stretch, &uf->stretch); |
422 | err |= __put_user(f->gap, &uf->gap); |
423 | err |= __put_user(f->rate, &uf->rate); |
424 | err |= __put_user(f->spec1, &uf->spec1); |
425 | err |= __put_user(f->fmt_gap, &uf->fmt_gap); |
426 | err |= __put_user((u64)f->name, (compat_caddr_t __user *)&uf->name); |
427 | break; |
428 | } |
429 | case FDGETDRVPRM32: |
430 | { |
431 | struct compat_floppy_drive_params __user *uf; |
432 | struct floppy_drive_params *f = karg; |
433 | |
434 | uf = compat_ptr(arg); |
435 | err = __put_user(f->cmos, &uf->cmos); |
436 | err |= __put_user(f->max_dtr, &uf->max_dtr); |
437 | err |= __put_user(f->hlt, &uf->hlt); |
438 | err |= __put_user(f->hut, &uf->hut); |
439 | err |= __put_user(f->srt, &uf->srt); |
440 | err |= __put_user(f->spinup, &uf->spinup); |
441 | err |= __put_user(f->spindown, &uf->spindown); |
442 | err |= __put_user(f->spindown_offset, &uf->spindown_offset); |
443 | err |= __put_user(f->select_delay, &uf->select_delay); |
444 | err |= __put_user(f->rps, &uf->rps); |
445 | err |= __put_user(f->tracks, &uf->tracks); |
446 | err |= __put_user(f->timeout, &uf->timeout); |
447 | err |= __put_user(f->interleave_sect, &uf->interleave_sect); |
448 | err |= __copy_to_user(&uf->max_errors, &f->max_errors, sizeof(f->max_errors)); |
449 | err |= __put_user(f->flags, &uf->flags); |
450 | err |= __put_user(f->read_track, &uf->read_track); |
451 | err |= __copy_to_user(uf->autodetect, f->autodetect, sizeof(f->autodetect)); |
452 | err |= __put_user(f->checkfreq, &uf->checkfreq); |
453 | err |= __put_user(f->native_format, &uf->native_format); |
454 | break; |
455 | } |
456 | case FDGETDRVSTAT32: |
457 | case FDPOLLDRVSTAT32: |
458 | { |
459 | struct compat_floppy_drive_struct __user *uf; |
460 | struct floppy_drive_struct *f = karg; |
461 | |
462 | uf = compat_ptr(arg); |
463 | err = __put_user(f->flags, &uf->flags); |
464 | err |= __put_user(f->spinup_date, &uf->spinup_date); |
465 | err |= __put_user(f->select_date, &uf->select_date); |
466 | err |= __put_user(f->first_read_date, &uf->first_read_date); |
467 | err |= __put_user(f->probed_format, &uf->probed_format); |
468 | err |= __put_user(f->track, &uf->track); |
469 | err |= __put_user(f->maxblock, &uf->maxblock); |
470 | err |= __put_user(f->maxtrack, &uf->maxtrack); |
471 | err |= __put_user(f->generation, &uf->generation); |
472 | err |= __put_user(f->keep_data, &uf->keep_data); |
473 | err |= __put_user(f->fd_ref, &uf->fd_ref); |
474 | err |= __put_user(f->fd_device, &uf->fd_device); |
475 | err |= __put_user(f->last_checked, &uf->last_checked); |
476 | err |= __put_user((u64)f->dmabuf, &uf->dmabuf); |
477 | err |= __put_user((u64)f->bufblocks, &uf->bufblocks); |
478 | break; |
479 | } |
480 | case FDGETFDCSTAT32: |
481 | { |
482 | struct compat_floppy_fdc_state __user *uf; |
483 | struct floppy_fdc_state *f = karg; |
484 | |
485 | uf = compat_ptr(arg); |
486 | err = __put_user(f->spec1, &uf->spec1); |
487 | err |= __put_user(f->spec2, &uf->spec2); |
488 | err |= __put_user(f->dtr, &uf->dtr); |
489 | err |= __put_user(f->version, &uf->version); |
490 | err |= __put_user(f->dor, &uf->dor); |
491 | err |= __put_user(f->address, &uf->address); |
492 | err |= __copy_to_user((char __user *)&uf->address + sizeof(uf->address), |
493 | (char *)&f->address + sizeof(f->address), sizeof(int)); |
494 | err |= __put_user(f->driver_version, &uf->driver_version); |
495 | err |= __copy_to_user(uf->track, f->track, sizeof(f->track)); |
496 | break; |
497 | } |
498 | case FDWERRORGET32: |
499 | { |
500 | struct compat_floppy_write_errors __user *uf; |
501 | struct floppy_write_errors *f = karg; |
502 | |
503 | uf = compat_ptr(arg); |
504 | err = __put_user(f->write_errors, &uf->write_errors); |
505 | err |= __put_user(f->first_error_sector, &uf->first_error_sector); |
506 | err |= __put_user(f->first_error_generation, &uf->first_error_generation); |
507 | err |= __put_user(f->last_error_sector, &uf->last_error_sector); |
508 | err |= __put_user(f->last_error_generation, &uf->last_error_generation); |
509 | err |= __put_user(f->badness, &uf->badness); |
510 | break; |
511 | } |
512 | default: |
513 | break; |
514 | } |
515 | if (err) |
516 | err = -EFAULT; |
517 | |
518 | out: |
519 | kfree(karg); |
520 | return err; |
521 | } |
522 | |
523 | static int compat_blkdev_driver_ioctl(struct block_device *bdev, fmode_t mode, |
524 | unsigned cmd, unsigned long arg) |
525 | { |
526 | switch (cmd) { |
527 | case HDIO_GET_UNMASKINTR: |
528 | case HDIO_GET_MULTCOUNT: |
529 | case HDIO_GET_KEEPSETTINGS: |
530 | case HDIO_GET_32BIT: |
531 | case HDIO_GET_NOWERR: |
532 | case HDIO_GET_DMA: |
533 | case HDIO_GET_NICE: |
534 | case HDIO_GET_WCACHE: |
535 | case HDIO_GET_ACOUSTIC: |
536 | case HDIO_GET_ADDRESS: |
537 | case HDIO_GET_BUSSTATE: |
538 | return compat_hdio_ioctl(bdev, mode, cmd, arg); |
539 | case FDSETPRM32: |
540 | case FDDEFPRM32: |
541 | case FDGETPRM32: |
542 | case FDSETDRVPRM32: |
543 | case FDGETDRVPRM32: |
544 | case FDGETDRVSTAT32: |
545 | case FDPOLLDRVSTAT32: |
546 | case FDGETFDCSTAT32: |
547 | case FDWERRORGET32: |
548 | return compat_fd_ioctl(bdev, mode, cmd, arg); |
549 | case CDROMREADAUDIO: |
550 | return compat_cdrom_read_audio(bdev, mode, cmd, arg); |
551 | case CDROM_SEND_PACKET: |
552 | return compat_cdrom_generic_command(bdev, mode, cmd, arg); |
553 | |
554 | /* |
555 | * No handler required for the ones below, we just need to |
556 | * convert arg to a 64 bit pointer. |
557 | */ |
558 | case BLKSECTSET: |
559 | /* |
560 | * 0x03 -- HD/IDE ioctl's used by hdparm and friends. |
561 | * Some need translations, these do not. |
562 | */ |
563 | case HDIO_GET_IDENTITY: |
564 | case HDIO_DRIVE_TASK: |
565 | case HDIO_DRIVE_CMD: |
566 | /* 0x330 is reserved -- it used to be HDIO_GETGEO_BIG */ |
567 | case 0x330: |
568 | /* 0x02 -- Floppy ioctls */ |
569 | case FDMSGON: |
570 | case FDMSGOFF: |
571 | case FDSETEMSGTRESH: |
572 | case FDFLUSH: |
573 | case FDWERRORCLR: |
574 | case FDSETMAXERRS: |
575 | case FDGETMAXERRS: |
576 | case FDGETDRVTYP: |
577 | case FDEJECT: |
578 | case FDCLRPRM: |
579 | case FDFMTBEG: |
580 | case FDFMTEND: |
581 | case FDRESET: |
582 | case FDTWADDLE: |
583 | case FDFMTTRK: |
584 | case FDRAWCMD: |
585 | /* CDROM stuff */ |
586 | case CDROMPAUSE: |
587 | case CDROMRESUME: |
588 | case CDROMPLAYMSF: |
589 | case CDROMPLAYTRKIND: |
590 | case CDROMREADTOCHDR: |
591 | case CDROMREADTOCENTRY: |
592 | case CDROMSTOP: |
593 | case CDROMSTART: |
594 | case CDROMEJECT: |
595 | case CDROMVOLCTRL: |
596 | case CDROMSUBCHNL: |
597 | case CDROMMULTISESSION: |
598 | case CDROM_GET_MCN: |
599 | case CDROMRESET: |
600 | case CDROMVOLREAD: |
601 | case CDROMSEEK: |
602 | case CDROMPLAYBLK: |
603 | case CDROMCLOSETRAY: |
604 | case CDROM_DISC_STATUS: |
605 | case CDROM_CHANGER_NSLOTS: |
606 | case CDROM_GET_CAPABILITY: |
607 | /* Ignore cdrom.h about these next 5 ioctls, they absolutely do |
608 | * not take a struct cdrom_read, instead they take a struct cdrom_msf |
609 | * which is compatible. |
610 | */ |
611 | case CDROMREADMODE2: |
612 | case CDROMREADMODE1: |
613 | case CDROMREADRAW: |
614 | case CDROMREADCOOKED: |
615 | case CDROMREADALL: |
616 | /* DVD ioctls */ |
617 | case DVD_READ_STRUCT: |
618 | case DVD_WRITE_STRUCT: |
619 | case DVD_AUTH: |
620 | arg = (unsigned long)compat_ptr(arg); |
621 | /* These intepret arg as an unsigned long, not as a pointer, |
622 | * so we must not do compat_ptr() conversion. */ |
623 | case HDIO_SET_MULTCOUNT: |
624 | case HDIO_SET_UNMASKINTR: |
625 | case HDIO_SET_KEEPSETTINGS: |
626 | case HDIO_SET_32BIT: |
627 | case HDIO_SET_NOWERR: |
628 | case HDIO_SET_DMA: |
629 | case HDIO_SET_PIO_MODE: |
630 | case HDIO_SET_NICE: |
631 | case HDIO_SET_WCACHE: |
632 | case HDIO_SET_ACOUSTIC: |
633 | case HDIO_SET_BUSSTATE: |
634 | case HDIO_SET_ADDRESS: |
635 | case CDROMEJECT_SW: |
636 | case CDROM_SET_OPTIONS: |
637 | case CDROM_CLEAR_OPTIONS: |
638 | case CDROM_SELECT_SPEED: |
639 | case CDROM_SELECT_DISC: |
640 | case CDROM_MEDIA_CHANGED: |
641 | case CDROM_DRIVE_STATUS: |
642 | case CDROM_LOCKDOOR: |
643 | case CDROM_DEBUG: |
644 | break; |
645 | default: |
646 | /* unknown ioctl number */ |
647 | return -ENOIOCTLCMD; |
648 | } |
649 | |
650 | return __blkdev_driver_ioctl(bdev, mode, cmd, arg); |
651 | } |
652 | |
653 | /* Most of the generic ioctls are handled in the normal fallback path. |
654 | This assumes the blkdev's low level compat_ioctl always returns |
655 | ENOIOCTLCMD for unknown ioctls. */ |
656 | long compat_blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg) |
657 | { |
658 | int ret = -ENOIOCTLCMD; |
659 | struct inode *inode = file->f_mapping->host; |
660 | struct block_device *bdev = inode->i_bdev; |
661 | struct gendisk *disk = bdev->bd_disk; |
662 | fmode_t mode = file->f_mode; |
663 | struct backing_dev_info *bdi; |
664 | loff_t size; |
665 | |
666 | /* |
667 | * O_NDELAY can be altered using fcntl(.., F_SETFL, ..), so we have |
668 | * to updated it before every ioctl. |
669 | */ |
670 | if (file->f_flags & O_NDELAY) |
671 | mode |= FMODE_NDELAY; |
672 | else |
673 | mode &= ~FMODE_NDELAY; |
674 | |
675 | switch (cmd) { |
676 | case HDIO_GETGEO: |
677 | return compat_hdio_getgeo(disk, bdev, compat_ptr(arg)); |
678 | case BLKPBSZGET: |
679 | return compat_put_uint(arg, bdev_physical_block_size(bdev)); |
680 | case BLKIOMIN: |
681 | return compat_put_uint(arg, bdev_io_min(bdev)); |
682 | case BLKIOOPT: |
683 | return compat_put_uint(arg, bdev_io_opt(bdev)); |
684 | case BLKALIGNOFF: |
685 | return compat_put_int(arg, bdev_alignment_offset(bdev)); |
686 | case BLKDISCARDZEROES: |
687 | return compat_put_uint(arg, bdev_discard_zeroes_data(bdev)); |
688 | case BLKFLSBUF: |
689 | case BLKROSET: |
690 | case BLKDISCARD: |
691 | case BLKSECDISCARD: |
692 | /* |
693 | * the ones below are implemented in blkdev_locked_ioctl, |
694 | * but we call blkdev_ioctl, which gets the lock for us |
695 | */ |
696 | case BLKRRPART: |
697 | return blkdev_ioctl(bdev, mode, cmd, |
698 | (unsigned long)compat_ptr(arg)); |
699 | case BLKBSZSET_32: |
700 | return blkdev_ioctl(bdev, mode, BLKBSZSET, |
701 | (unsigned long)compat_ptr(arg)); |
702 | case BLKPG: |
703 | return compat_blkpg_ioctl(bdev, mode, cmd, compat_ptr(arg)); |
704 | case BLKRAGET: |
705 | case BLKFRAGET: |
706 | if (!arg) |
707 | return -EINVAL; |
708 | bdi = blk_get_backing_dev_info(bdev); |
709 | if (bdi == NULL) |
710 | return -ENOTTY; |
711 | return compat_put_long(arg, |
712 | (bdi->ra_pages * PAGE_CACHE_SIZE) / 512); |
713 | case BLKROGET: /* compatible */ |
714 | return compat_put_int(arg, bdev_read_only(bdev) != 0); |
715 | case BLKBSZGET_32: /* get the logical block size (cf. BLKSSZGET) */ |
716 | return compat_put_int(arg, block_size(bdev)); |
717 | case BLKSSZGET: /* get block device hardware sector size */ |
718 | return compat_put_int(arg, bdev_logical_block_size(bdev)); |
719 | case BLKSECTGET: |
720 | return compat_put_ushort(arg, |
721 | queue_max_sectors(bdev_get_queue(bdev))); |
722 | case BLKROTATIONAL: |
723 | return compat_put_ushort(arg, |
724 | !blk_queue_nonrot(bdev_get_queue(bdev))); |
725 | case BLKRASET: /* compatible, but no compat_ptr (!) */ |
726 | case BLKFRASET: |
727 | if (!capable(CAP_SYS_ADMIN)) |
728 | return -EACCES; |
729 | bdi = blk_get_backing_dev_info(bdev); |
730 | if (bdi == NULL) |
731 | return -ENOTTY; |
732 | bdi->ra_pages = (arg * 512) / PAGE_CACHE_SIZE; |
733 | return 0; |
734 | case BLKGETSIZE: |
735 | size = i_size_read(bdev->bd_inode); |
736 | if ((size >> 9) > ~0UL) |
737 | return -EFBIG; |
738 | return compat_put_ulong(arg, size >> 9); |
739 | |
740 | case BLKGETSIZE64_32: |
741 | return compat_put_u64(arg, i_size_read(bdev->bd_inode)); |
742 | |
743 | case BLKTRACESETUP32: |
744 | case BLKTRACESTART: /* compatible */ |
745 | case BLKTRACESTOP: /* compatible */ |
746 | case BLKTRACETEARDOWN: /* compatible */ |
747 | ret = blk_trace_ioctl(bdev, cmd, compat_ptr(arg)); |
748 | return ret; |
749 | default: |
750 | if (disk->fops->compat_ioctl) |
751 | ret = disk->fops->compat_ioctl(bdev, mode, cmd, arg); |
752 | if (ret == -ENOIOCTLCMD) |
753 | ret = compat_blkdev_driver_ioctl(bdev, mode, cmd, arg); |
754 | return ret; |
755 | } |
756 | } |
757 |
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Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9