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block: Do not clamp max_hw_sectors for stacking devices
[linux.git] / block / compat_ioctl.c
CommitLineData
f58c4c0a
AB		 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/syscalls.h>
10#include <linux/smp_lock.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_long(unsigned long arg, long val)
25{
26 return put_user(val, (compat_long_t __user *)compat_ptr(arg));
27}
28
29static int compat_put_ulong(unsigned long arg, compat_ulong_t val)
30{
31 return put_user(val, (compat_ulong_t __user *)compat_ptr(arg));
32}
33
34static int compat_put_u64(unsigned long arg, u64 val)
35{
36 return put_user(val, (compat_u64 __user *)compat_ptr(arg));
37}
38
9617db08
AB		 39struct compat_hd_geometry {
40 unsigned char heads;
41 unsigned char sectors;
42 unsigned short cylinders;
43 u32 start;
44};
45
46static int compat_hdio_getgeo(struct gendisk *disk, struct block_device *bdev,
47 struct compat_hd_geometry __user *ugeo)
48{
49 struct hd_geometry geo;
50 int ret;
51
52 if (!ugeo)
53 return -EINVAL;
54 if (!disk->fops->getgeo)
55 return -ENOTTY;
56
57 /*
58 * We need to set the startsect first, the driver may
59 * want to override it.
60 */
61 geo.start = get_start_sect(bdev);
62 ret = disk->fops->getgeo(bdev, &geo);
63 if (ret)
64 return ret;
65
66 ret = copy_to_user(ugeo, &geo, 4);
67 ret |= __put_user(geo.start, &ugeo->start);
68 if (ret)
69 ret = -EFAULT;
70
71 return ret;
72}
73
33c2dca4
AV		 74static int compat_hdio_ioctl(struct block_device *bdev, fmode_t mode,
75 unsigned int cmd, unsigned long arg)
9617db08
AB		 76{
77 mm_segment_t old_fs = get_fs();
78 unsigned long kval;
79 unsigned int __user *uvp;
80 int error;
81
82 set_fs(KERNEL_DS);
33c2dca4 83 error = __blkdev_driver_ioctl(bdev, mode,
9617db08
AB		 84 cmd, (unsigned long)(&kval));
85 set_fs(old_fs);
86
87 if (error == 0) {
88 uvp = compat_ptr(arg);
89 if (put_user(kval, uvp))
90 error = -EFAULT;
91 }
92 return error;
93}
94
b3087cc4
AB		 95struct compat_cdrom_read_audio {
96 union cdrom_addr addr;
97 u8 addr_format;
98 compat_int_t nframes;
99 compat_caddr_t buf;
100};
101
102struct compat_cdrom_generic_command {
103 unsigned char cmd[CDROM_PACKET_SIZE];
104 compat_caddr_t buffer;
105 compat_uint_t buflen;
106 compat_int_t stat;
107 compat_caddr_t sense;
108 unsigned char data_direction;
109 compat_int_t quiet;
110 compat_int_t timeout;
111 compat_caddr_t reserved[1];
112};
113
33c2dca4
AV		 114static int compat_cdrom_read_audio(struct block_device *bdev, fmode_t mode,
115 unsigned int cmd, unsigned long arg)
b3087cc4
AB		 116{
117 struct cdrom_read_audio __user *cdread_audio;
118 struct compat_cdrom_read_audio __user *cdread_audio32;
119 __u32 data;
120 void __user *datap;
121
122 cdread_audio = compat_alloc_user_space(sizeof(*cdread_audio));
123 cdread_audio32 = compat_ptr(arg);
124
125 if (copy_in_user(&cdread_audio->addr,
126 &cdread_audio32->addr,
127 (sizeof(*cdread_audio32) -
128 sizeof(compat_caddr_t))))
129 return -EFAULT;
130
131 if (get_user(data, &cdread_audio32->buf))
132 return -EFAULT;
133 datap = compat_ptr(data);
134 if (put_user(datap, &cdread_audio->buf))
135 return -EFAULT;
136
33c2dca4 137 return __blkdev_driver_ioctl(bdev, mode, cmd,
b3087cc4
AB		 138 (unsigned long)cdread_audio);
139}
140
33c2dca4
AV		 141static int compat_cdrom_generic_command(struct block_device *bdev, fmode_t mode,
142 unsigned int cmd, unsigned long arg)
b3087cc4
AB		 143{
144 struct cdrom_generic_command __user *cgc;
145 struct compat_cdrom_generic_command __user *cgc32;
146 u32 data;
147 unsigned char dir;
148 int itmp;
149
150 cgc = compat_alloc_user_space(sizeof(*cgc));
151 cgc32 = compat_ptr(arg);
152
153 if (copy_in_user(&cgc->cmd, &cgc32->cmd, sizeof(cgc->cmd)) ||
154 get_user(data, &cgc32->buffer) ||
155 put_user(compat_ptr(data), &cgc->buffer) ||
156 copy_in_user(&cgc->buflen, &cgc32->buflen,
157 (sizeof(unsigned int) + sizeof(int))) ||
158 get_user(data, &cgc32->sense) ||
159 put_user(compat_ptr(data), &cgc->sense) ||
160 get_user(dir, &cgc32->data_direction) ||
161 put_user(dir, &cgc->data_direction) ||
162 get_user(itmp, &cgc32->quiet) ||
163 put_user(itmp, &cgc->quiet) ||
164 get_user(itmp, &cgc32->timeout) ||
165 put_user(itmp, &cgc->timeout) ||
166 get_user(data, &cgc32->reserved[0]) ||
167 put_user(compat_ptr(data), &cgc->reserved[0]))
168 return -EFAULT;
169
33c2dca4 170 return __blkdev_driver_ioctl(bdev, mode, cmd, (unsigned long)cgc);
b3087cc4
AB		 171}
172
18cf7f87
AB		 173struct compat_blkpg_ioctl_arg {
174 compat_int_t op;
175 compat_int_t flags;
176 compat_int_t datalen;
177 compat_caddr_t data;
178};
179
56b26add 180static int compat_blkpg_ioctl(struct block_device *bdev, fmode_t mode,
18cf7f87
AB		 181 unsigned int cmd, struct compat_blkpg_ioctl_arg __user *ua32)
182{
183 struct blkpg_ioctl_arg __user *a = compat_alloc_user_space(sizeof(*a));
184 compat_caddr_t udata;
185 compat_int_t n;
186 int err;
187
188 err = get_user(n, &ua32->op);
189 err |= put_user(n, &a->op);
190 err |= get_user(n, &ua32->flags);
191 err |= put_user(n, &a->flags);
192 err |= get_user(n, &ua32->datalen);
193 err |= put_user(n, &a->datalen);
194 err |= get_user(udata, &ua32->data);
195 err |= put_user(compat_ptr(udata), &a->data);
196 if (err)
197 return err;
198
56b26add 199 return blkdev_ioctl(bdev, mode, cmd, (unsigned long)a);
18cf7f87
AB		 200}
201
f58c4c0a
AB		 202#define BLKBSZGET_32 _IOR(0x12, 112, int)
203#define BLKBSZSET_32 _IOW(0x12, 113, int)
204#define BLKGETSIZE64_32 _IOR(0x12, 114, int)
205
1ca91cd0
AB		 206struct compat_floppy_struct {
207 compat_uint_t size;
208 compat_uint_t sect;
209 compat_uint_t head;
210 compat_uint_t track;
211 compat_uint_t stretch;
212 unsigned char gap;
213 unsigned char rate;
214 unsigned char spec1;
215 unsigned char fmt_gap;
216 const compat_caddr_t name;
217};
218
219struct compat_floppy_drive_params {
220 char cmos;
221 compat_ulong_t max_dtr;
222 compat_ulong_t hlt;
223 compat_ulong_t hut;
224 compat_ulong_t srt;
225 compat_ulong_t spinup;
226 compat_ulong_t spindown;
227 unsigned char spindown_offset;
228 unsigned char select_delay;
229 unsigned char rps;
230 unsigned char tracks;
231 compat_ulong_t timeout;
232 unsigned char interleave_sect;
233 struct floppy_max_errors max_errors;
234 char flags;
235 char read_track;
236 short autodetect[8];
237 compat_int_t checkfreq;
238 compat_int_t native_format;
239};
240
241struct compat_floppy_drive_struct {
242 signed char flags;
243 compat_ulong_t spinup_date;
244 compat_ulong_t select_date;
245 compat_ulong_t first_read_date;
246 short probed_format;
247 short track;
248 short maxblock;
249 short maxtrack;
250 compat_int_t generation;
251 compat_int_t keep_data;
252 compat_int_t fd_ref;
253 compat_int_t fd_device;
254 compat_int_t last_checked;
255 compat_caddr_t dmabuf;
256 compat_int_t bufblocks;
257};
258
259struct compat_floppy_fdc_state {
260 compat_int_t spec1;
261 compat_int_t spec2;
262 compat_int_t dtr;
263 unsigned char version;
264 unsigned char dor;
265 compat_ulong_t address;
266 unsigned int rawcmd:2;
267 unsigned int reset:1;
268 unsigned int need_configure:1;
269 unsigned int perp_mode:2;
270 unsigned int has_fifo:1;
271 unsigned int driver_version;
272 unsigned char track[4];
273};
274
275struct compat_floppy_write_errors {
276 unsigned int write_errors;
277 compat_ulong_t first_error_sector;
278 compat_int_t first_error_generation;
279 compat_ulong_t last_error_sector;
280 compat_int_t last_error_generation;
281 compat_uint_t badness;
282};
283
284#define FDSETPRM32 _IOW(2, 0x42, struct compat_floppy_struct)
285#define FDDEFPRM32 _IOW(2, 0x43, struct compat_floppy_struct)
286#define FDGETPRM32 _IOR(2, 0x04, struct compat_floppy_struct)
287#define FDSETDRVPRM32 _IOW(2, 0x90, struct compat_floppy_drive_params)
288#define FDGETDRVPRM32 _IOR(2, 0x11, struct compat_floppy_drive_params)
289#define FDGETDRVSTAT32 _IOR(2, 0x12, struct compat_floppy_drive_struct)
290#define FDPOLLDRVSTAT32 _IOR(2, 0x13, struct compat_floppy_drive_struct)
291#define FDGETFDCSTAT32 _IOR(2, 0x15, struct compat_floppy_fdc_state)
292#define FDWERRORGET32 _IOR(2, 0x17, struct compat_floppy_write_errors)
293
294static struct {
295 unsigned int cmd32;
296 unsigned int cmd;
297} fd_ioctl_trans_table[] = {
298 { FDSETPRM32, FDSETPRM },
299 { FDDEFPRM32, FDDEFPRM },
300 { FDGETPRM32, FDGETPRM },
301 { FDSETDRVPRM32, FDSETDRVPRM },
302 { FDGETDRVPRM32, FDGETDRVPRM },
303 { FDGETDRVSTAT32, FDGETDRVSTAT },
304 { FDPOLLDRVSTAT32, FDPOLLDRVSTAT },
305 { FDGETFDCSTAT32, FDGETFDCSTAT },
306 { FDWERRORGET32, FDWERRORGET }
307};
308
309#define NR_FD_IOCTL_TRANS ARRAY_SIZE(fd_ioctl_trans_table)
310
33c2dca4
AV		 311static int compat_fd_ioctl(struct block_device *bdev, fmode_t mode,
312 unsigned int cmd, unsigned long arg)
1ca91cd0
AB		 313{
314 mm_segment_t old_fs = get_fs();
315 void *karg = NULL;
316 unsigned int kcmd = 0;
317 int i, err;
318
319 for (i = 0; i < NR_FD_IOCTL_TRANS; i++)
320 if (cmd == fd_ioctl_trans_table[i].cmd32) {
321 kcmd = fd_ioctl_trans_table[i].cmd;
322 break;
323 }
324 if (!kcmd)
325 return -EINVAL;
326
327 switch (cmd) {
328 case FDSETPRM32:
329 case FDDEFPRM32:
330 case FDGETPRM32:
331 {
332 compat_uptr_t name;
333 struct compat_floppy_struct __user *uf;
334 struct floppy_struct *f;
335
336 uf = compat_ptr(arg);
337 f = karg = kmalloc(sizeof(struct floppy_struct), GFP_KERNEL);
338 if (!karg)
339 return -ENOMEM;
340 if (cmd == FDGETPRM32)
341 break;
342 err = __get_user(f->size, &uf->size);
343 err |= __get_user(f->sect, &uf->sect);
344 err |= __get_user(f->head, &uf->head);
345 err |= __get_user(f->track, &uf->track);
346 err |= __get_user(f->stretch, &uf->stretch);
347 err |= __get_user(f->gap, &uf->gap);
348 err |= __get_user(f->rate, &uf->rate);
349 err |= __get_user(f->spec1, &uf->spec1);
350 err |= __get_user(f->fmt_gap, &uf->fmt_gap);
351 err |= __get_user(name, &uf->name);
352 f->name = compat_ptr(name);
353 if (err) {
354 err = -EFAULT;
355 goto out;
356 }
357 break;
358 }
359 case FDSETDRVPRM32:
360 case FDGETDRVPRM32:
361 {
362 struct compat_floppy_drive_params __user *uf;
363 struct floppy_drive_params *f;
364
365 uf = compat_ptr(arg);
366 f = karg = kmalloc(sizeof(struct floppy_drive_params), GFP_KERNEL);
367 if (!karg)
368 return -ENOMEM;
369 if (cmd == FDGETDRVPRM32)
370 break;
371 err = __get_user(f->cmos, &uf->cmos);
372 err |= __get_user(f->max_dtr, &uf->max_dtr);
373 err |= __get_user(f->hlt, &uf->hlt);
374 err |= __get_user(f->hut, &uf->hut);
375 err |= __get_user(f->srt, &uf->srt);
376 err |= __get_user(f->spinup, &uf->spinup);
377 err |= __get_user(f->spindown, &uf->spindown);
378 err |= __get_user(f->spindown_offset, &uf->spindown_offset);
379 err |= __get_user(f->select_delay, &uf->select_delay);
380 err |= __get_user(f->rps, &uf->rps);
381 err |= __get_user(f->tracks, &uf->tracks);
382 err |= __get_user(f->timeout, &uf->timeout);
383 err |= __get_user(f->interleave_sect, &uf->interleave_sect);
384 err |= __copy_from_user(&f->max_errors, &uf->max_errors, sizeof(f->max_errors));
385 err |= __get_user(f->flags, &uf->flags);
386 err |= __get_user(f->read_track, &uf->read_track);
387 err |= __copy_from_user(f->autodetect, uf->autodetect, sizeof(f->autodetect));
388 err |= __get_user(f->checkfreq, &uf->checkfreq);
389 err |= __get_user(f->native_format, &uf->native_format);
390 if (err) {
391 err = -EFAULT;
392 goto out;
393 }
394 break;
395 }
396 case FDGETDRVSTAT32:
397 case FDPOLLDRVSTAT32:
398 karg = kmalloc(sizeof(struct floppy_drive_struct), GFP_KERNEL);
399 if (!karg)
400 return -ENOMEM;
401 break;
402 case FDGETFDCSTAT32:
403 karg = kmalloc(sizeof(struct floppy_fdc_state), GFP_KERNEL);
404 if (!karg)
405 return -ENOMEM;
406 break;
407 case FDWERRORGET32:
408 karg = kmalloc(sizeof(struct floppy_write_errors), GFP_KERNEL);
409 if (!karg)
410 return -ENOMEM;
411 break;
412 default:
413 return -EINVAL;
414 }
415 set_fs(KERNEL_DS);
33c2dca4 416 err = __blkdev_driver_ioctl(bdev, mode, kcmd, (unsigned long)karg);
1ca91cd0
AB		 417 set_fs(old_fs);
418 if (err)
419 goto out;
420 switch (cmd) {
421 case FDGETPRM32:
422 {
423 struct floppy_struct *f = karg;
424 struct compat_floppy_struct __user *uf = compat_ptr(arg);
425
426 err = __put_user(f->size, &uf->size);
427 err |= __put_user(f->sect, &uf->sect);
428 err |= __put_user(f->head, &uf->head);
429 err |= __put_user(f->track, &uf->track);
430 err |= __put_user(f->stretch, &uf->stretch);
431 err |= __put_user(f->gap, &uf->gap);
432 err |= __put_user(f->rate, &uf->rate);
433 err |= __put_user(f->spec1, &uf->spec1);
434 err |= __put_user(f->fmt_gap, &uf->fmt_gap);
435 err |= __put_user((u64)f->name, (compat_caddr_t __user *)&uf->name);
436 break;
437 }
438 case FDGETDRVPRM32:
439 {
440 struct compat_floppy_drive_params __user *uf;
441 struct floppy_drive_params *f = karg;
442
443 uf = compat_ptr(arg);
444 err = __put_user(f->cmos, &uf->cmos);
445 err |= __put_user(f->max_dtr, &uf->max_dtr);
446 err |= __put_user(f->hlt, &uf->hlt);
447 err |= __put_user(f->hut, &uf->hut);
448 err |= __put_user(f->srt, &uf->srt);
449 err |= __put_user(f->spinup, &uf->spinup);
450 err |= __put_user(f->spindown, &uf->spindown);
451 err |= __put_user(f->spindown_offset, &uf->spindown_offset);
452 err |= __put_user(f->select_delay, &uf->select_delay);
453 err |= __put_user(f->rps, &uf->rps);
454 err |= __put_user(f->tracks, &uf->tracks);
455 err |= __put_user(f->timeout, &uf->timeout);
456 err |= __put_user(f->interleave_sect, &uf->interleave_sect);
457 err |= __copy_to_user(&uf->max_errors, &f->max_errors, sizeof(f->max_errors));
458 err |= __put_user(f->flags, &uf->flags);
459 err |= __put_user(f->read_track, &uf->read_track);
460 err |= __copy_to_user(uf->autodetect, f->autodetect, sizeof(f->autodetect));
461 err |= __put_user(f->checkfreq, &uf->checkfreq);
462 err |= __put_user(f->native_format, &uf->native_format);
463 break;
464 }
465 case FDGETDRVSTAT32:
466 case FDPOLLDRVSTAT32:
467 {
468 struct compat_floppy_drive_struct __user *uf;
469 struct floppy_drive_struct *f = karg;
470
471 uf = compat_ptr(arg);
472 err = __put_user(f->flags, &uf->flags);
473 err |= __put_user(f->spinup_date, &uf->spinup_date);
474 err |= __put_user(f->select_date, &uf->select_date);
475 err |= __put_user(f->first_read_date, &uf->first_read_date);
476 err |= __put_user(f->probed_format, &uf->probed_format);
477 err |= __put_user(f->track, &uf->track);
478 err |= __put_user(f->maxblock, &uf->maxblock);
479 err |= __put_user(f->maxtrack, &uf->maxtrack);
480 err |= __put_user(f->generation, &uf->generation);
481 err |= __put_user(f->keep_data, &uf->keep_data);
482 err |= __put_user(f->fd_ref, &uf->fd_ref);
483 err |= __put_user(f->fd_device, &uf->fd_device);
484 err |= __put_user(f->last_checked, &uf->last_checked);
485 err |= __put_user((u64)f->dmabuf, &uf->dmabuf);
486 err |= __put_user((u64)f->bufblocks, &uf->bufblocks);
487 break;
488 }
489 case FDGETFDCSTAT32:
490 {
491 struct compat_floppy_fdc_state __user *uf;
492 struct floppy_fdc_state *f = karg;
493
494 uf = compat_ptr(arg);
495 err = __put_user(f->spec1, &uf->spec1);
496 err |= __put_user(f->spec2, &uf->spec2);
497 err |= __put_user(f->dtr, &uf->dtr);
498 err |= __put_user(f->version, &uf->version);
499 err |= __put_user(f->dor, &uf->dor);
500 err |= __put_user(f->address, &uf->address);
501 err |= __copy_to_user((char __user *)&uf->address + sizeof(uf->address),
502 (char *)&f->address + sizeof(f->address), sizeof(int));
503 err |= __put_user(f->driver_version, &uf->driver_version);
504 err |= __copy_to_user(uf->track, f->track, sizeof(f->track));
505 break;
506 }
507 case FDWERRORGET32:
508 {
509 struct compat_floppy_write_errors __user *uf;
510 struct floppy_write_errors *f = karg;
511
512 uf = compat_ptr(arg);
513 err = __put_user(f->write_errors, &uf->write_errors);
514 err |= __put_user(f->first_error_sector, &uf->first_error_sector);
515 err |= __put_user(f->first_error_generation, &uf->first_error_generation);
516 err |= __put_user(f->last_error_sector, &uf->last_error_sector);
517 err |= __put_user(f->last_error_generation, &uf->last_error_generation);
518 err |= __put_user(f->badness, &uf->badness);
519 break;
520 }
521 default:
522 break;
523 }
524 if (err)
525 err = -EFAULT;
526
527out:
528 kfree(karg);
529 return err;
530}
531
171044d4
AB		 532struct compat_blk_user_trace_setup {
533 char name[32];
534 u16 act_mask;
535 u32 buf_size;
536 u32 buf_nr;
537 compat_u64 start_lba;
538 compat_u64 end_lba;
539 u32 pid;
540};
541#define BLKTRACESETUP32 _IOWR(0x12, 115, struct compat_blk_user_trace_setup)
542
543static int compat_blk_trace_setup(struct block_device *bdev, char __user *arg)
544{
545 struct blk_user_trace_setup buts;
546 struct compat_blk_user_trace_setup cbuts;
547 struct request_queue *q;
6da127ad 548 char b[BDEVNAME_SIZE];
171044d4
AB		 549 int ret;
550
551 q = bdev_get_queue(bdev);
552 if (!q)
553 return -ENXIO;
554
555 if (copy_from_user(&cbuts, arg, sizeof(cbuts)))
556 return -EFAULT;
557
f36f21ec 558 bdevname(bdev, b);
6da127ad 559
171044d4
AB		 560 buts = (struct blk_user_trace_setup) {
561 .act_mask = cbuts.act_mask,
562 .buf_size = cbuts.buf_size,
563 .buf_nr = cbuts.buf_nr,
564 .start_lba = cbuts.start_lba,
565 .end_lba = cbuts.end_lba,
566 .pid = cbuts.pid,
567 };
568 memcpy(&buts.name, &cbuts.name, 32);
569
570 mutex_lock(&bdev->bd_mutex);
d0deef5b 571 ret = do_blk_trace_setup(q, b, bdev->bd_dev, bdev, &buts);
171044d4
AB		 572 mutex_unlock(&bdev->bd_mutex);
573 if (ret)
574 return ret;
575
576 if (copy_to_user(arg, &buts.name, 32))
577 return -EFAULT;
578
579 return 0;
580}
581
33c2dca4
AV		 582static int compat_blkdev_driver_ioctl(struct block_device *bdev, fmode_t mode,
583 unsigned cmd, unsigned long arg)
7199d4cd 584{
33013a88 585 switch (cmd) {
9617db08
AB		 586 case HDIO_GET_UNMASKINTR:
587 case HDIO_GET_MULTCOUNT:
588 case HDIO_GET_KEEPSETTINGS:
589 case HDIO_GET_32BIT:
590 case HDIO_GET_NOWERR:
591 case HDIO_GET_DMA:
592 case HDIO_GET_NICE:
593 case HDIO_GET_WCACHE:
594 case HDIO_GET_ACOUSTIC:
595 case HDIO_GET_ADDRESS:
596 case HDIO_GET_BUSSTATE:
33c2dca4 597 return compat_hdio_ioctl(bdev, mode, cmd, arg);
1ca91cd0
AB		 598 case FDSETPRM32:
599 case FDDEFPRM32:
600 case FDGETPRM32:
601 case FDSETDRVPRM32:
602 case FDGETDRVPRM32:
603 case FDGETDRVSTAT32:
604 case FDPOLLDRVSTAT32:
605 case FDGETFDCSTAT32:
606 case FDWERRORGET32:
33c2dca4 607 return compat_fd_ioctl(bdev, mode, cmd, arg);
b3087cc4 608 case CDROMREADAUDIO:
33c2dca4 609 return compat_cdrom_read_audio(bdev, mode, cmd, arg);
b3087cc4 610 case CDROM_SEND_PACKET:
33c2dca4 611 return compat_cdrom_generic_command(bdev, mode, cmd, arg);
b3087cc4 612
7199d4cd
AB		 613 /*
614 * No handler required for the ones below, we just need to
615 * convert arg to a 64 bit pointer.
616 */
617 case BLKSECTSET:
618 /*
619 * 0x03 -- HD/IDE ioctl's used by hdparm and friends.
620 * Some need translations, these do not.
621 */
622 case HDIO_GET_IDENTITY:
623 case HDIO_DRIVE_TASK:
624 case HDIO_DRIVE_CMD:
7199d4cd
AB		 625 /* 0x330 is reserved -- it used to be HDIO_GETGEO_BIG */
626 case 0x330:
627 /* 0x02 -- Floppy ioctls */
628 case FDMSGON:
629 case FDMSGOFF:
630 case FDSETEMSGTRESH:
631 case FDFLUSH:
632 case FDWERRORCLR:
633 case FDSETMAXERRS:
634 case FDGETMAXERRS:
635 case FDGETDRVTYP:
636 case FDEJECT:
637 case FDCLRPRM:
638 case FDFMTBEG:
639 case FDFMTEND:
640 case FDRESET:
641 case FDTWADDLE:
642 case FDFMTTRK:
643 case FDRAWCMD:
644 /* CDROM stuff */
645 case CDROMPAUSE:
646 case CDROMRESUME:
647 case CDROMPLAYMSF:
648 case CDROMPLAYTRKIND:
649 case CDROMREADTOCHDR:
650 case CDROMREADTOCENTRY:
651 case CDROMSTOP:
652 case CDROMSTART:
653 case CDROMEJECT:
654 case CDROMVOLCTRL:
655 case CDROMSUBCHNL:
656 case CDROMMULTISESSION:
657 case CDROM_GET_MCN:
658 case CDROMRESET:
659 case CDROMVOLREAD:
660 case CDROMSEEK:
661 case CDROMPLAYBLK:
662 case CDROMCLOSETRAY:
663 case CDROM_DISC_STATUS:
664 case CDROM_CHANGER_NSLOTS:
665 case CDROM_GET_CAPABILITY:
666 /* Ignore cdrom.h about these next 5 ioctls, they absolutely do
667 * not take a struct cdrom_read, instead they take a struct cdrom_msf
668 * which is compatible.
669 */
670 case CDROMREADMODE2:
671 case CDROMREADMODE1:
672 case CDROMREADRAW:
673 case CDROMREADCOOKED:
674 case CDROMREADALL:
675 /* DVD ioctls */
676 case DVD_READ_STRUCT:
677 case DVD_WRITE_STRUCT:
678 case DVD_AUTH:
679 arg = (unsigned long)compat_ptr(arg);
1c925604
AS		 680 /* These intepret arg as an unsigned long, not as a pointer,
681 * so we must not do compat_ptr() conversion. */
682 case HDIO_SET_MULTCOUNT:
683 case HDIO_SET_UNMASKINTR:
684 case HDIO_SET_KEEPSETTINGS:
685 case HDIO_SET_32BIT:
686 case HDIO_SET_NOWERR:
687 case HDIO_SET_DMA:
688 case HDIO_SET_PIO_MODE:
689 case HDIO_SET_NICE:
690 case HDIO_SET_WCACHE:
691 case HDIO_SET_ACOUSTIC:
692 case HDIO_SET_BUSSTATE:
693 case HDIO_SET_ADDRESS:
694 case CDROMEJECT_SW:
695 case CDROM_SET_OPTIONS:
696 case CDROM_CLEAR_OPTIONS:
697 case CDROM_SELECT_SPEED:
698 case CDROM_SELECT_DISC:
699 case CDROM_MEDIA_CHANGED:
700 case CDROM_DRIVE_STATUS:
701 case CDROM_LOCKDOOR:
702 case CDROM_DEBUG:
7199d4cd
AB		 703 break;
704 default:
705 /* unknown ioctl number */
706 return -ENOIOCTLCMD;
707 }
708
33c2dca4 709 return __blkdev_driver_ioctl(bdev, mode, cmd, arg);
7199d4cd
AB		 710}
711
45048d09
AV		 712/* Most of the generic ioctls are handled in the normal fallback path.
713 This assumes the blkdev's low level compat_ioctl always returns
714 ENOIOCTLCMD for unknown ioctls. */
715long compat_blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg)
f58c4c0a 716{
45048d09
AV		 717 int ret = -ENOIOCTLCMD;
718 struct inode *inode = file->f_mapping->host;
719 struct block_device *bdev = inode->i_bdev;
720 struct gendisk *disk = bdev->bd_disk;
721 fmode_t mode = file->f_mode;
f58c4c0a 722 struct backing_dev_info *bdi;
45048d09
AV		 723 loff_t size;
724
fd4ce1ac
CH		 725 /*
726 * O_NDELAY can be altered using fcntl(.., F_SETFL, ..), so we have
727 * to updated it before every ioctl.
728 */
45048d09 729 if (file->f_flags & O_NDELAY)
fd4ce1ac
CH		 730 mode |= FMODE_NDELAY;
731 else
732 mode &= ~FMODE_NDELAY;
f58c4c0a
AB		 733
734 switch (cmd) {
45048d09
AV		 735 case HDIO_GETGEO:
736 return compat_hdio_getgeo(disk, bdev, compat_ptr(arg));
737 case BLKFLSBUF:
738 case BLKROSET:
739 case BLKDISCARD:
740 /*
741 * the ones below are implemented in blkdev_locked_ioctl,
742 * but we call blkdev_ioctl, which gets the lock for us
743 */
744 case BLKRRPART:
56b26add 745 return blkdev_ioctl(bdev, mode, cmd,
45048d09
AV		 746 (unsigned long)compat_ptr(arg));
747 case BLKBSZSET_32:
56b26add 748 return blkdev_ioctl(bdev, mode, BLKBSZSET,
45048d09
AV		 749 (unsigned long)compat_ptr(arg));
750 case BLKPG:
56b26add 751 return compat_blkpg_ioctl(bdev, mode, cmd, compat_ptr(arg));
f58c4c0a
AB		 752 case BLKRAGET:
753 case BLKFRAGET:
754 if (!arg)
755 return -EINVAL;
756 bdi = blk_get_backing_dev_info(bdev);
757 if (bdi == NULL)
758 return -ENOTTY;
759 return compat_put_long(arg,
760 (bdi->ra_pages * PAGE_CACHE_SIZE) / 512);
761 case BLKROGET: /* compatible */
762 return compat_put_int(arg, bdev_read_only(bdev) != 0);
763 case BLKBSZGET_32: /* get the logical block size (cf. BLKSSZGET) */
764 return compat_put_int(arg, block_size(bdev));
765 case BLKSSZGET: /* get block device hardware sector size */
e1defc4f 766 return compat_put_int(arg, bdev_logical_block_size(bdev));
f58c4c0a
AB		 767 case BLKSECTGET:
768 return compat_put_ushort(arg,
ae03bf63 769 queue_max_sectors(bdev_get_queue(bdev)));
f58c4c0a
AB		 770 case BLKRASET: /* compatible, but no compat_ptr (!) */
771 case BLKFRASET:
772 if (!capable(CAP_SYS_ADMIN))
773 return -EACCES;
774 bdi = blk_get_backing_dev_info(bdev);
775 if (bdi == NULL)
776 return -ENOTTY;
777 bdi->ra_pages = (arg * 512) / PAGE_CACHE_SIZE;
778 return 0;
779 case BLKGETSIZE:
45048d09
AV		 780 size = bdev->bd_inode->i_size;
781 if ((size >> 9) > ~0UL)
f58c4c0a 782 return -EFBIG;
45048d09 783 return compat_put_ulong(arg, size >> 9);
f58c4c0a
AB		 784
785 case BLKGETSIZE64_32:
786 return compat_put_u64(arg, bdev->bd_inode->i_size);
171044d4
AB		 787
788 case BLKTRACESETUP32:
45048d09
AV		 789 lock_kernel();
790 ret = compat_blk_trace_setup(bdev, compat_ptr(arg));
791 unlock_kernel();
792 return ret;
171044d4
AB		 793 case BLKTRACESTART: /* compatible */
794 case BLKTRACESTOP: /* compatible */
795 case BLKTRACETEARDOWN: /* compatible */
45048d09
AV		 796 lock_kernel();
797 ret = blk_trace_ioctl(bdev, cmd, compat_ptr(arg));
798 unlock_kernel();
7199d4cd 799 return ret;
45048d09
AV		 800 default:
801 if (disk->fops->compat_ioctl)
802 ret = disk->fops->compat_ioctl(bdev, mode, cmd, arg);
803 if (ret == -ENOIOCTLCMD)
804 ret = compat_blkdev_driver_ioctl(bdev, mode, cmd, arg);
805 return ret;
806 }
f58c4c0a 807}
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