projects/linux·blob v4.4 · refs

756 lines · 20.8 KiB

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