tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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/smp_lock.h>
12#include <linux/types.h>
13#include <linux/uaccess.h>
14
15static int compat_put_ushort(unsigned long arg, unsigned short val)
16{
17 return put_user(val, (unsigned short __user *)compat_ptr(arg));
18}
19
20static int compat_put_int(unsigned long arg, int val)
21{
22 return put_user(val, (compat_int_t __user *)compat_ptr(arg));
23}
24
25static int compat_put_uint(unsigned long arg, unsigned int val)
26{
27 return put_user(val, (compat_uint_t __user *)compat_ptr(arg));
28}
29
30static int compat_put_long(unsigned long arg, long val)
31{
32 return put_user(val, (compat_long_t __user *)compat_ptr(arg));
33}
34
35static int compat_put_ulong(unsigned long arg, compat_ulong_t val)
36{
37 return put_user(val, (compat_ulong_t __user *)compat_ptr(arg));
38}
39
40static int compat_put_u64(unsigned long arg, u64 val)
41{
42 return put_user(val, (compat_u64 __user *)compat_ptr(arg));
43}
44
45struct compat_hd_geometry {
46 unsigned char heads;
47 unsigned char sectors;
48 unsigned short cylinders;
49 u32 start;
50};
51
52static int compat_hdio_getgeo(struct gendisk *disk, struct block_device *bdev,
53 struct compat_hd_geometry __user *ugeo)
54{
55 struct hd_geometry geo;
56 int ret;
57
58 if (!ugeo)
59 return -EINVAL;
60 if (!disk->fops->getgeo)
61 return -ENOTTY;
62
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_struct {
213 compat_uint_t size;
214 compat_uint_t sect;
215 compat_uint_t head;
216 compat_uint_t track;
217 compat_uint_t stretch;
218 unsigned char gap;
219 unsigned char rate;
220 unsigned char spec1;
221 unsigned char fmt_gap;
222 const compat_caddr_t name;
223};
224
225struct compat_floppy_drive_params {
226 char cmos;
227 compat_ulong_t max_dtr;
228 compat_ulong_t hlt;
229 compat_ulong_t hut;
230 compat_ulong_t srt;
231 compat_ulong_t spinup;
232 compat_ulong_t spindown;
233 unsigned char spindown_offset;
234 unsigned char select_delay;
235 unsigned char rps;
236 unsigned char tracks;
237 compat_ulong_t timeout;
238 unsigned char interleave_sect;
239 struct floppy_max_errors max_errors;
240 char flags;
241 char read_track;
242 short autodetect[8];
243 compat_int_t checkfreq;
244 compat_int_t native_format;
245};
246
247struct compat_floppy_drive_struct {
248 signed char flags;
249 compat_ulong_t spinup_date;
250 compat_ulong_t select_date;
251 compat_ulong_t first_read_date;
252 short probed_format;
253 short track;
254 short maxblock;
255 short maxtrack;
256 compat_int_t generation;
257 compat_int_t keep_data;
258 compat_int_t fd_ref;
259 compat_int_t fd_device;
260 compat_int_t last_checked;
261 compat_caddr_t dmabuf;
262 compat_int_t bufblocks;
263};
264
265struct compat_floppy_fdc_state {
266 compat_int_t spec1;
267 compat_int_t spec2;
268 compat_int_t dtr;
269 unsigned char version;
270 unsigned char dor;
271 compat_ulong_t address;
272 unsigned int rawcmd:2;
273 unsigned int reset:1;
274 unsigned int need_configure:1;
275 unsigned int perp_mode:2;
276 unsigned int has_fifo:1;
277 unsigned int driver_version;
278 unsigned char track[4];
279};
280
281struct compat_floppy_write_errors {
282 unsigned int write_errors;
283 compat_ulong_t first_error_sector;
284 compat_int_t first_error_generation;
285 compat_ulong_t last_error_sector;
286 compat_int_t last_error_generation;
287 compat_uint_t badness;
288};
289
290#define FDSETPRM32 _IOW(2, 0x42, struct compat_floppy_struct)
291#define FDDEFPRM32 _IOW(2, 0x43, struct compat_floppy_struct)
292#define FDGETPRM32 _IOR(2, 0x04, struct compat_floppy_struct)
293#define FDSETDRVPRM32 _IOW(2, 0x90, struct compat_floppy_drive_params)
294#define FDGETDRVPRM32 _IOR(2, 0x11, struct compat_floppy_drive_params)
295#define FDGETDRVSTAT32 _IOR(2, 0x12, struct compat_floppy_drive_struct)
296#define FDPOLLDRVSTAT32 _IOR(2, 0x13, struct compat_floppy_drive_struct)
297#define FDGETFDCSTAT32 _IOR(2, 0x15, struct compat_floppy_fdc_state)
298#define FDWERRORGET32 _IOR(2, 0x17, struct compat_floppy_write_errors)
299
300static struct {
301 unsigned int cmd32;
302 unsigned int cmd;
303} fd_ioctl_trans_table[] = {
304 { FDSETPRM32, FDSETPRM },
305 { FDDEFPRM32, FDDEFPRM },
306 { FDGETPRM32, FDGETPRM },
307 { FDSETDRVPRM32, FDSETDRVPRM },
308 { FDGETDRVPRM32, FDGETDRVPRM },
309 { FDGETDRVSTAT32, FDGETDRVSTAT },
310 { FDPOLLDRVSTAT32, FDPOLLDRVSTAT },
311 { FDGETFDCSTAT32, FDGETFDCSTAT },
312 { FDWERRORGET32, FDWERRORGET }
313};
314
315#define NR_FD_IOCTL_TRANS ARRAY_SIZE(fd_ioctl_trans_table)
316
317static int compat_fd_ioctl(struct block_device *bdev, fmode_t mode,
318 unsigned int cmd, unsigned long arg)
319{
320 mm_segment_t old_fs = get_fs();
321 void *karg = NULL;
322 unsigned int kcmd = 0;
323 int i, err;
324
325 for (i = 0; i < NR_FD_IOCTL_TRANS; i++)
326 if (cmd == fd_ioctl_trans_table[i].cmd32) {
327 kcmd = fd_ioctl_trans_table[i].cmd;
328 break;
329 }
330 if (!kcmd)
331 return -EINVAL;
332
333 switch (cmd) {
334 case FDSETPRM32:
335 case FDDEFPRM32:
336 case FDGETPRM32:
337 {
338 compat_uptr_t name;
339 struct compat_floppy_struct __user *uf;
340 struct floppy_struct *f;
341
342 uf = compat_ptr(arg);
343 f = karg = kmalloc(sizeof(struct floppy_struct), GFP_KERNEL);
344 if (!karg)
345 return -ENOMEM;
346 if (cmd == FDGETPRM32)
347 break;
348 err = __get_user(f->size, &uf->size);
349 err |= __get_user(f->sect, &uf->sect);
350 err |= __get_user(f->head, &uf->head);
351 err |= __get_user(f->track, &uf->track);
352 err |= __get_user(f->stretch, &uf->stretch);
353 err |= __get_user(f->gap, &uf->gap);
354 err |= __get_user(f->rate, &uf->rate);
355 err |= __get_user(f->spec1, &uf->spec1);
356 err |= __get_user(f->fmt_gap, &uf->fmt_gap);
357 err |= __get_user(name, &uf->name);
358 f->name = compat_ptr(name);
359 if (err) {
360 err = -EFAULT;
361 goto out;
362 }
363 break;
364 }
365 case FDSETDRVPRM32:
366 case FDGETDRVPRM32:
367 {
368 struct compat_floppy_drive_params __user *uf;
369 struct floppy_drive_params *f;
370
371 uf = compat_ptr(arg);
372 f = karg = kmalloc(sizeof(struct floppy_drive_params), GFP_KERNEL);
373 if (!karg)
374 return -ENOMEM;
375 if (cmd == FDGETDRVPRM32)
376 break;
377 err = __get_user(f->cmos, &uf->cmos);
378 err |= __get_user(f->max_dtr, &uf->max_dtr);
379 err |= __get_user(f->hlt, &uf->hlt);
380 err |= __get_user(f->hut, &uf->hut);
381 err |= __get_user(f->srt, &uf->srt);
382 err |= __get_user(f->spinup, &uf->spinup);
383 err |= __get_user(f->spindown, &uf->spindown);
384 err |= __get_user(f->spindown_offset, &uf->spindown_offset);
385 err |= __get_user(f->select_delay, &uf->select_delay);
386 err |= __get_user(f->rps, &uf->rps);
387 err |= __get_user(f->tracks, &uf->tracks);
388 err |= __get_user(f->timeout, &uf->timeout);
389 err |= __get_user(f->interleave_sect, &uf->interleave_sect);
390 err |= __copy_from_user(&f->max_errors, &uf->max_errors, sizeof(f->max_errors));
391 err |= __get_user(f->flags, &uf->flags);
392 err |= __get_user(f->read_track, &uf->read_track);
393 err |= __copy_from_user(f->autodetect, uf->autodetect, sizeof(f->autodetect));
394 err |= __get_user(f->checkfreq, &uf->checkfreq);
395 err |= __get_user(f->native_format, &uf->native_format);
396 if (err) {
397 err = -EFAULT;
398 goto out;
399 }
400 break;
401 }
402 case FDGETDRVSTAT32:
403 case FDPOLLDRVSTAT32:
404 karg = kmalloc(sizeof(struct floppy_drive_struct), GFP_KERNEL);
405 if (!karg)
406 return -ENOMEM;
407 break;
408 case FDGETFDCSTAT32:
409 karg = kmalloc(sizeof(struct floppy_fdc_state), GFP_KERNEL);
410 if (!karg)
411 return -ENOMEM;
412 break;
413 case FDWERRORGET32:
414 karg = kmalloc(sizeof(struct floppy_write_errors), GFP_KERNEL);
415 if (!karg)
416 return -ENOMEM;
417 break;
418 default:
419 return -EINVAL;
420 }
421 set_fs(KERNEL_DS);
422 err = __blkdev_driver_ioctl(bdev, mode, kcmd, (unsigned long)karg);
423 set_fs(old_fs);
424 if (err)
425 goto out;
426 switch (cmd) {
427 case FDGETPRM32:
428 {
429 struct floppy_struct *f = karg;
430 struct compat_floppy_struct __user *uf = compat_ptr(arg);
431
432 err = __put_user(f->size, &uf->size);
433 err |= __put_user(f->sect, &uf->sect);
434 err |= __put_user(f->head, &uf->head);
435 err |= __put_user(f->track, &uf->track);
436 err |= __put_user(f->stretch, &uf->stretch);
437 err |= __put_user(f->gap, &uf->gap);
438 err |= __put_user(f->rate, &uf->rate);
439 err |= __put_user(f->spec1, &uf->spec1);
440 err |= __put_user(f->fmt_gap, &uf->fmt_gap);
441 err |= __put_user((u64)f->name, (compat_caddr_t __user *)&uf->name);
442 break;
443 }
444 case FDGETDRVPRM32:
445 {
446 struct compat_floppy_drive_params __user *uf;
447 struct floppy_drive_params *f = karg;
448
449 uf = compat_ptr(arg);
450 err = __put_user(f->cmos, &uf->cmos);
451 err |= __put_user(f->max_dtr, &uf->max_dtr);
452 err |= __put_user(f->hlt, &uf->hlt);
453 err |= __put_user(f->hut, &uf->hut);
454 err |= __put_user(f->srt, &uf->srt);
455 err |= __put_user(f->spinup, &uf->spinup);
456 err |= __put_user(f->spindown, &uf->spindown);
457 err |= __put_user(f->spindown_offset, &uf->spindown_offset);
458 err |= __put_user(f->select_delay, &uf->select_delay);
459 err |= __put_user(f->rps, &uf->rps);
460 err |= __put_user(f->tracks, &uf->tracks);
461 err |= __put_user(f->timeout, &uf->timeout);
462 err |= __put_user(f->interleave_sect, &uf->interleave_sect);
463 err |= __copy_to_user(&uf->max_errors, &f->max_errors, sizeof(f->max_errors));
464 err |= __put_user(f->flags, &uf->flags);
465 err |= __put_user(f->read_track, &uf->read_track);
466 err |= __copy_to_user(uf->autodetect, f->autodetect, sizeof(f->autodetect));
467 err |= __put_user(f->checkfreq, &uf->checkfreq);
468 err |= __put_user(f->native_format, &uf->native_format);
469 break;
470 }
471 case FDGETDRVSTAT32:
472 case FDPOLLDRVSTAT32:
473 {
474 struct compat_floppy_drive_struct __user *uf;
475 struct floppy_drive_struct *f = karg;
476
477 uf = compat_ptr(arg);
478 err = __put_user(f->flags, &uf->flags);
479 err |= __put_user(f->spinup_date, &uf->spinup_date);
480 err |= __put_user(f->select_date, &uf->select_date);
481 err |= __put_user(f->first_read_date, &uf->first_read_date);
482 err |= __put_user(f->probed_format, &uf->probed_format);
483 err |= __put_user(f->track, &uf->track);
484 err |= __put_user(f->maxblock, &uf->maxblock);
485 err |= __put_user(f->maxtrack, &uf->maxtrack);
486 err |= __put_user(f->generation, &uf->generation);
487 err |= __put_user(f->keep_data, &uf->keep_data);
488 err |= __put_user(f->fd_ref, &uf->fd_ref);
489 err |= __put_user(f->fd_device, &uf->fd_device);
490 err |= __put_user(f->last_checked, &uf->last_checked);
491 err |= __put_user((u64)f->dmabuf, &uf->dmabuf);
492 err |= __put_user((u64)f->bufblocks, &uf->bufblocks);
493 break;
494 }
495 case FDGETFDCSTAT32:
496 {
497 struct compat_floppy_fdc_state __user *uf;
498 struct floppy_fdc_state *f = karg;
499
500 uf = compat_ptr(arg);
501 err = __put_user(f->spec1, &uf->spec1);
502 err |= __put_user(f->spec2, &uf->spec2);
503 err |= __put_user(f->dtr, &uf->dtr);
504 err |= __put_user(f->version, &uf->version);
505 err |= __put_user(f->dor, &uf->dor);
506 err |= __put_user(f->address, &uf->address);
507 err |= __copy_to_user((char __user *)&uf->address + sizeof(uf->address),
508 (char *)&f->address + sizeof(f->address), sizeof(int));
509 err |= __put_user(f->driver_version, &uf->driver_version);
510 err |= __copy_to_user(uf->track, f->track, sizeof(f->track));
511 break;
512 }
513 case FDWERRORGET32:
514 {
515 struct compat_floppy_write_errors __user *uf;
516 struct floppy_write_errors *f = karg;
517
518 uf = compat_ptr(arg);
519 err = __put_user(f->write_errors, &uf->write_errors);
520 err |= __put_user(f->first_error_sector, &uf->first_error_sector);
521 err |= __put_user(f->first_error_generation, &uf->first_error_generation);
522 err |= __put_user(f->last_error_sector, &uf->last_error_sector);
523 err |= __put_user(f->last_error_generation, &uf->last_error_generation);
524 err |= __put_user(f->badness, &uf->badness);
525 break;
526 }
527 default:
528 break;
529 }
530 if (err)
531 err = -EFAULT;
532
533out:
534 kfree(karg);
535 return err;
536}
537
538struct compat_blk_user_trace_setup {
539 char name[32];
540 u16 act_mask;
541 u32 buf_size;
542 u32 buf_nr;
543 compat_u64 start_lba;
544 compat_u64 end_lba;
545 u32 pid;
546};
547#define BLKTRACESETUP32 _IOWR(0x12, 115, struct compat_blk_user_trace_setup)
548
549static int compat_blk_trace_setup(struct block_device *bdev, char __user *arg)
550{
551 struct blk_user_trace_setup buts;
552 struct compat_blk_user_trace_setup cbuts;
553 struct request_queue *q;
554 char b[BDEVNAME_SIZE];
555 int ret;
556
557 q = bdev_get_queue(bdev);
558 if (!q)
559 return -ENXIO;
560
561 if (copy_from_user(&cbuts, arg, sizeof(cbuts)))
562 return -EFAULT;
563
564 bdevname(bdev, b);
565
566 buts = (struct blk_user_trace_setup) {
567 .act_mask = cbuts.act_mask,
568 .buf_size = cbuts.buf_size,
569 .buf_nr = cbuts.buf_nr,
570 .start_lba = cbuts.start_lba,
571 .end_lba = cbuts.end_lba,
572 .pid = cbuts.pid,
573 };
574 memcpy(&buts.name, &cbuts.name, 32);
575
576 mutex_lock(&bdev->bd_mutex);
577 ret = do_blk_trace_setup(q, b, bdev->bd_dev, bdev, &buts);
578 mutex_unlock(&bdev->bd_mutex);
579 if (ret)
580 return ret;
581
582 if (copy_to_user(arg, &buts.name, 32))
583 return -EFAULT;
584
585 return 0;
586}
587
588static int compat_blkdev_driver_ioctl(struct block_device *bdev, fmode_t mode,
589 unsigned cmd, unsigned long arg)
590{
591 switch (cmd) {
592 case HDIO_GET_UNMASKINTR:
593 case HDIO_GET_MULTCOUNT:
594 case HDIO_GET_KEEPSETTINGS:
595 case HDIO_GET_32BIT:
596 case HDIO_GET_NOWERR:
597 case HDIO_GET_DMA:
598 case HDIO_GET_NICE:
599 case HDIO_GET_WCACHE:
600 case HDIO_GET_ACOUSTIC:
601 case HDIO_GET_ADDRESS:
602 case HDIO_GET_BUSSTATE:
603 return compat_hdio_ioctl(bdev, mode, cmd, arg);
604 case FDSETPRM32:
605 case FDDEFPRM32:
606 case FDGETPRM32:
607 case FDSETDRVPRM32:
608 case FDGETDRVPRM32:
609 case FDGETDRVSTAT32:
610 case FDPOLLDRVSTAT32:
611 case FDGETFDCSTAT32:
612 case FDWERRORGET32:
613 return compat_fd_ioctl(bdev, mode, cmd, arg);
614 case CDROMREADAUDIO:
615 return compat_cdrom_read_audio(bdev, mode, cmd, arg);
616 case CDROM_SEND_PACKET:
617 return compat_cdrom_generic_command(bdev, mode, cmd, arg);
618
619 /*
620 * No handler required for the ones below, we just need to
621 * convert arg to a 64 bit pointer.
622 */
623 case BLKSECTSET:
624 /*
625 * 0x03 -- HD/IDE ioctl's used by hdparm and friends.
626 * Some need translations, these do not.
627 */
628 case HDIO_GET_IDENTITY:
629 case HDIO_DRIVE_TASK:
630 case HDIO_DRIVE_CMD:
631 /* 0x330 is reserved -- it used to be HDIO_GETGEO_BIG */
632 case 0x330:
633 /* 0x02 -- Floppy ioctls */
634 case FDMSGON:
635 case FDMSGOFF:
636 case FDSETEMSGTRESH:
637 case FDFLUSH:
638 case FDWERRORCLR:
639 case FDSETMAXERRS:
640 case FDGETMAXERRS:
641 case FDGETDRVTYP:
642 case FDEJECT:
643 case FDCLRPRM:
644 case FDFMTBEG:
645 case FDFMTEND:
646 case FDRESET:
647 case FDTWADDLE:
648 case FDFMTTRK:
649 case FDRAWCMD:
650 /* CDROM stuff */
651 case CDROMPAUSE:
652 case CDROMRESUME:
653 case CDROMPLAYMSF:
654 case CDROMPLAYTRKIND:
655 case CDROMREADTOCHDR:
656 case CDROMREADTOCENTRY:
657 case CDROMSTOP:
658 case CDROMSTART:
659 case CDROMEJECT:
660 case CDROMVOLCTRL:
661 case CDROMSUBCHNL:
662 case CDROMMULTISESSION:
663 case CDROM_GET_MCN:
664 case CDROMRESET:
665 case CDROMVOLREAD:
666 case CDROMSEEK:
667 case CDROMPLAYBLK:
668 case CDROMCLOSETRAY:
669 case CDROM_DISC_STATUS:
670 case CDROM_CHANGER_NSLOTS:
671 case CDROM_GET_CAPABILITY:
672 /* Ignore cdrom.h about these next 5 ioctls, they absolutely do
673 * not take a struct cdrom_read, instead they take a struct cdrom_msf
674 * which is compatible.
675 */
676 case CDROMREADMODE2:
677 case CDROMREADMODE1:
678 case CDROMREADRAW:
679 case CDROMREADCOOKED:
680 case CDROMREADALL:
681 /* DVD ioctls */
682 case DVD_READ_STRUCT:
683 case DVD_WRITE_STRUCT:
684 case DVD_AUTH:
685 arg = (unsigned long)compat_ptr(arg);
686 /* These intepret arg as an unsigned long, not as a pointer,
687 * so we must not do compat_ptr() conversion. */
688 case HDIO_SET_MULTCOUNT:
689 case HDIO_SET_UNMASKINTR:
690 case HDIO_SET_KEEPSETTINGS:
691 case HDIO_SET_32BIT:
692 case HDIO_SET_NOWERR:
693 case HDIO_SET_DMA:
694 case HDIO_SET_PIO_MODE:
695 case HDIO_SET_NICE:
696 case HDIO_SET_WCACHE:
697 case HDIO_SET_ACOUSTIC:
698 case HDIO_SET_BUSSTATE:
699 case HDIO_SET_ADDRESS:
700 case CDROMEJECT_SW:
701 case CDROM_SET_OPTIONS:
702 case CDROM_CLEAR_OPTIONS:
703 case CDROM_SELECT_SPEED:
704 case CDROM_SELECT_DISC:
705 case CDROM_MEDIA_CHANGED:
706 case CDROM_DRIVE_STATUS:
707 case CDROM_LOCKDOOR:
708 case CDROM_DEBUG:
709 break;
710 default:
711 /* unknown ioctl number */
712 return -ENOIOCTLCMD;
713 }
714
715 return __blkdev_driver_ioctl(bdev, mode, cmd, arg);
716}
717
718/* Most of the generic ioctls are handled in the normal fallback path.
719 This assumes the blkdev's low level compat_ioctl always returns
720 ENOIOCTLCMD for unknown ioctls. */
721long compat_blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg)
722{
723 int ret = -ENOIOCTLCMD;
724 struct inode *inode = file->f_mapping->host;
725 struct block_device *bdev = inode->i_bdev;
726 struct gendisk *disk = bdev->bd_disk;
727 fmode_t mode = file->f_mode;
728 struct backing_dev_info *bdi;
729 loff_t size;
730
731 /*
732 * O_NDELAY can be altered using fcntl(.., F_SETFL, ..), so we have
733 * to updated it before every ioctl.
734 */
735 if (file->f_flags & O_NDELAY)
736 mode |= FMODE_NDELAY;
737 else
738 mode &= ~FMODE_NDELAY;
739
740 switch (cmd) {
741 case HDIO_GETGEO:
742 return compat_hdio_getgeo(disk, bdev, compat_ptr(arg));
743 case BLKPBSZGET:
744 return compat_put_uint(arg, bdev_physical_block_size(bdev));
745 case BLKIOMIN:
746 return compat_put_uint(arg, bdev_io_min(bdev));
747 case BLKIOOPT:
748 return compat_put_uint(arg, bdev_io_opt(bdev));
749 case BLKALIGNOFF:
750 return compat_put_int(arg, bdev_alignment_offset(bdev));
751 case BLKDISCARDZEROES:
752 return compat_put_uint(arg, bdev_discard_zeroes_data(bdev));
753 case BLKFLSBUF:
754 case BLKROSET:
755 case BLKDISCARD:
756 /*
757 * the ones below are implemented in blkdev_locked_ioctl,
758 * but we call blkdev_ioctl, which gets the lock for us
759 */
760 case BLKRRPART:
761 return blkdev_ioctl(bdev, mode, cmd,
762 (unsigned long)compat_ptr(arg));
763 case BLKBSZSET_32:
764 return blkdev_ioctl(bdev, mode, BLKBSZSET,
765 (unsigned long)compat_ptr(arg));
766 case BLKPG:
767 return compat_blkpg_ioctl(bdev, mode, cmd, compat_ptr(arg));
768 case BLKRAGET:
769 case BLKFRAGET:
770 if (!arg)
771 return -EINVAL;
772 bdi = blk_get_backing_dev_info(bdev);
773 if (bdi == NULL)
774 return -ENOTTY;
775 return compat_put_long(arg,
776 (bdi->ra_pages * PAGE_CACHE_SIZE) / 512);
777 case BLKROGET: /* compatible */
778 return compat_put_int(arg, bdev_read_only(bdev) != 0);
779 case BLKBSZGET_32: /* get the logical block size (cf. BLKSSZGET) */
780 return compat_put_int(arg, block_size(bdev));
781 case BLKSSZGET: /* get block device hardware sector size */
782 return compat_put_int(arg, bdev_logical_block_size(bdev));
783 case BLKSECTGET:
784 return compat_put_ushort(arg,
785 queue_max_sectors(bdev_get_queue(bdev)));
786 case BLKRASET: /* compatible, but no compat_ptr (!) */
787 case BLKFRASET:
788 if (!capable(CAP_SYS_ADMIN))
789 return -EACCES;
790 bdi = blk_get_backing_dev_info(bdev);
791 if (bdi == NULL)
792 return -ENOTTY;
793 bdi->ra_pages = (arg * 512) / PAGE_CACHE_SIZE;
794 return 0;
795 case BLKGETSIZE:
796 size = bdev->bd_inode->i_size;
797 if ((size >> 9) > ~0UL)
798 return -EFBIG;
799 return compat_put_ulong(arg, size >> 9);
800
801 case BLKGETSIZE64_32:
802 return compat_put_u64(arg, bdev->bd_inode->i_size);
803
804 case BLKTRACESETUP32:
805 lock_kernel();
806 ret = compat_blk_trace_setup(bdev, compat_ptr(arg));
807 unlock_kernel();
808 return ret;
809 case BLKTRACESTART: /* compatible */
810 case BLKTRACESTOP: /* compatible */
811 case BLKTRACETEARDOWN: /* compatible */
812 lock_kernel();
813 ret = blk_trace_ioctl(bdev, cmd, compat_ptr(arg));
814 unlock_kernel();
815 return ret;
816 default:
817 if (disk->fops->compat_ioctl)
818 ret = disk->fops->compat_ioctl(bdev, mode, cmd, arg);
819 if (ret == -ENOIOCTLCMD)
820 ret = compat_blkdev_driver_ioctl(bdev, mode, cmd, arg);
821 return ret;
822 }
823}