]> bbs.cooldavid.org Git - net-next-2.6.git/blame - block/compat_ioctl.c
git://bbs.cooldavid.org / net-next-2.6.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
xps: Transmit Packet Steering
[net-next-2.6.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>
5a0e3ad6 9#include <linux/slab.h>
f58c4c0a
AB		 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
ac481c20
MP		 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
f58c4c0a
AB		 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
9617db08
AB		 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
33c2dca4
AV		 80static int compat_hdio_ioctl(struct block_device *bdev, fmode_t mode,
81 unsigned int cmd, unsigned long arg)
9617db08
AB		 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);
33c2dca4 89 error = __blkdev_driver_ioctl(bdev, mode,
9617db08
AB		 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
b3087cc4
AB		 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
33c2dca4
AV		 120static int compat_cdrom_read_audio(struct block_device *bdev, fmode_t mode,
121 unsigned int cmd, unsigned long arg)
b3087cc4
AB		 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
33c2dca4 143 return __blkdev_driver_ioctl(bdev, mode, cmd,
b3087cc4
AB		 144 (unsigned long)cdread_audio);
145}
146
33c2dca4
AV		 147static int compat_cdrom_generic_command(struct block_device *bdev, fmode_t mode,
148 unsigned int cmd, unsigned long arg)
b3087cc4
AB		 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
33c2dca4 176 return __blkdev_driver_ioctl(bdev, mode, cmd, (unsigned long)cgc);
b3087cc4
AB		 177}
178
18cf7f87
AB		 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
56b26add 186static int compat_blkpg_ioctl(struct block_device *bdev, fmode_t mode,
18cf7f87
AB		 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
56b26add 205 return blkdev_ioctl(bdev, mode, cmd, (unsigned long)a);
18cf7f87
AB		 206}
207
f58c4c0a
AB		 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
1ca91cd0
AB		 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
33c2dca4
AV		 317static int compat_fd_ioctl(struct block_device *bdev, fmode_t mode,
318 unsigned int cmd, unsigned long arg)
1ca91cd0
AB		 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);
33c2dca4 422 err = __blkdev_driver_ioctl(bdev, mode, kcmd, (unsigned long)karg);
1ca91cd0
AB		 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
33c2dca4
AV		 538static int compat_blkdev_driver_ioctl(struct block_device *bdev, fmode_t mode,
539 unsigned cmd, unsigned long arg)
7199d4cd 540{
33013a88 541 switch (cmd) {
9617db08
AB		 542 case HDIO_GET_UNMASKINTR:
543 case HDIO_GET_MULTCOUNT:
544 case HDIO_GET_KEEPSETTINGS:
545 case HDIO_GET_32BIT:
546 case HDIO_GET_NOWERR:
547 case HDIO_GET_DMA:
548 case HDIO_GET_NICE:
549 case HDIO_GET_WCACHE:
550 case HDIO_GET_ACOUSTIC:
551 case HDIO_GET_ADDRESS:
552 case HDIO_GET_BUSSTATE:
33c2dca4 553 return compat_hdio_ioctl(bdev, mode, cmd, arg);
1ca91cd0
AB		 554 case FDSETPRM32:
555 case FDDEFPRM32:
556 case FDGETPRM32:
557 case FDSETDRVPRM32:
558 case FDGETDRVPRM32:
559 case FDGETDRVSTAT32:
560 case FDPOLLDRVSTAT32:
561 case FDGETFDCSTAT32:
562 case FDWERRORGET32:
33c2dca4 563 return compat_fd_ioctl(bdev, mode, cmd, arg);
b3087cc4 564 case CDROMREADAUDIO:
33c2dca4 565 return compat_cdrom_read_audio(bdev, mode, cmd, arg);
b3087cc4 566 case CDROM_SEND_PACKET:
33c2dca4 567 return compat_cdrom_generic_command(bdev, mode, cmd, arg);
b3087cc4 568
7199d4cd
AB		 569 /*
570 * No handler required for the ones below, we just need to
571 * convert arg to a 64 bit pointer.
572 */
573 case BLKSECTSET:
574 /*
575 * 0x03 -- HD/IDE ioctl's used by hdparm and friends.
576 * Some need translations, these do not.
577 */
578 case HDIO_GET_IDENTITY:
579 case HDIO_DRIVE_TASK:
580 case HDIO_DRIVE_CMD:
7199d4cd
AB		 581 /* 0x330 is reserved -- it used to be HDIO_GETGEO_BIG */
582 case 0x330:
583 /* 0x02 -- Floppy ioctls */
584 case FDMSGON:
585 case FDMSGOFF:
586 case FDSETEMSGTRESH:
587 case FDFLUSH:
588 case FDWERRORCLR:
589 case FDSETMAXERRS:
590 case FDGETMAXERRS:
591 case FDGETDRVTYP:
592 case FDEJECT:
593 case FDCLRPRM:
594 case FDFMTBEG:
595 case FDFMTEND:
596 case FDRESET:
597 case FDTWADDLE:
598 case FDFMTTRK:
599 case FDRAWCMD:
600 /* CDROM stuff */
601 case CDROMPAUSE:
602 case CDROMRESUME:
603 case CDROMPLAYMSF:
604 case CDROMPLAYTRKIND:
605 case CDROMREADTOCHDR:
606 case CDROMREADTOCENTRY:
607 case CDROMSTOP:
608 case CDROMSTART:
609 case CDROMEJECT:
610 case CDROMVOLCTRL:
611 case CDROMSUBCHNL:
612 case CDROMMULTISESSION:
613 case CDROM_GET_MCN:
614 case CDROMRESET:
615 case CDROMVOLREAD:
616 case CDROMSEEK:
617 case CDROMPLAYBLK:
618 case CDROMCLOSETRAY:
619 case CDROM_DISC_STATUS:
620 case CDROM_CHANGER_NSLOTS:
621 case CDROM_GET_CAPABILITY:
622 /* Ignore cdrom.h about these next 5 ioctls, they absolutely do
623 * not take a struct cdrom_read, instead they take a struct cdrom_msf
624 * which is compatible.
625 */
626 case CDROMREADMODE2:
627 case CDROMREADMODE1:
628 case CDROMREADRAW:
629 case CDROMREADCOOKED:
630 case CDROMREADALL:
631 /* DVD ioctls */
632 case DVD_READ_STRUCT:
633 case DVD_WRITE_STRUCT:
634 case DVD_AUTH:
635 arg = (unsigned long)compat_ptr(arg);
1c925604
AS		 636 /* These intepret arg as an unsigned long, not as a pointer,
637 * so we must not do compat_ptr() conversion. */
638 case HDIO_SET_MULTCOUNT:
639 case HDIO_SET_UNMASKINTR:
640 case HDIO_SET_KEEPSETTINGS:
641 case HDIO_SET_32BIT:
642 case HDIO_SET_NOWERR:
643 case HDIO_SET_DMA:
644 case HDIO_SET_PIO_MODE:
645 case HDIO_SET_NICE:
646 case HDIO_SET_WCACHE:
647 case HDIO_SET_ACOUSTIC:
648 case HDIO_SET_BUSSTATE:
649 case HDIO_SET_ADDRESS:
650 case CDROMEJECT_SW:
651 case CDROM_SET_OPTIONS:
652 case CDROM_CLEAR_OPTIONS:
653 case CDROM_SELECT_SPEED:
654 case CDROM_SELECT_DISC:
655 case CDROM_MEDIA_CHANGED:
656 case CDROM_DRIVE_STATUS:
657 case CDROM_LOCKDOOR:
658 case CDROM_DEBUG:
7199d4cd
AB		 659 break;
660 default:
661 /* unknown ioctl number */
662 return -ENOIOCTLCMD;
663 }
664
33c2dca4 665 return __blkdev_driver_ioctl(bdev, mode, cmd, arg);
7199d4cd
AB		 666}
667
45048d09
AV		 668/* Most of the generic ioctls are handled in the normal fallback path.
669 This assumes the blkdev's low level compat_ioctl always returns
670 ENOIOCTLCMD for unknown ioctls. */
671long compat_blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg)
f58c4c0a 672{
45048d09
AV		 673 int ret = -ENOIOCTLCMD;
674 struct inode *inode = file->f_mapping->host;
675 struct block_device *bdev = inode->i_bdev;
676 struct gendisk *disk = bdev->bd_disk;
677 fmode_t mode = file->f_mode;
f58c4c0a 678 struct backing_dev_info *bdi;
45048d09
AV		 679 loff_t size;
680
fd4ce1ac
CH		 681 /*
682 * O_NDELAY can be altered using fcntl(.., F_SETFL, ..), so we have
683 * to updated it before every ioctl.
684 */
45048d09 685 if (file->f_flags & O_NDELAY)
fd4ce1ac
CH		 686 mode |= FMODE_NDELAY;
687 else
688 mode &= ~FMODE_NDELAY;
f58c4c0a
AB		 689
690 switch (cmd) {
45048d09
AV		 691 case HDIO_GETGEO:
692 return compat_hdio_getgeo(disk, bdev, compat_ptr(arg));
ac481c20
MP		 693 case BLKPBSZGET:
694 return compat_put_uint(arg, bdev_physical_block_size(bdev));
695 case BLKIOMIN:
696 return compat_put_uint(arg, bdev_io_min(bdev));
697 case BLKIOOPT:
698 return compat_put_uint(arg, bdev_io_opt(bdev));
699 case BLKALIGNOFF:
700 return compat_put_int(arg, bdev_alignment_offset(bdev));
98262f27
MP		 701 case BLKDISCARDZEROES:
702 return compat_put_uint(arg, bdev_discard_zeroes_data(bdev));
45048d09
AV		 703 case BLKFLSBUF:
704 case BLKROSET:
705 case BLKDISCARD:
8d57a98c 706 case BLKSECDISCARD:
45048d09
AV		 707 /*
708 * the ones below are implemented in blkdev_locked_ioctl,
709 * but we call blkdev_ioctl, which gets the lock for us
710 */
711 case BLKRRPART:
56b26add 712 return blkdev_ioctl(bdev, mode, cmd,
45048d09
AV		 713 (unsigned long)compat_ptr(arg));
714 case BLKBSZSET_32:
56b26add 715 return blkdev_ioctl(bdev, mode, BLKBSZSET,
45048d09
AV		 716 (unsigned long)compat_ptr(arg));
717 case BLKPG:
56b26add 718 return compat_blkpg_ioctl(bdev, mode, cmd, compat_ptr(arg));
f58c4c0a
AB		 719 case BLKRAGET:
720 case BLKFRAGET:
721 if (!arg)
722 return -EINVAL;
723 bdi = blk_get_backing_dev_info(bdev);
724 if (bdi == NULL)
725 return -ENOTTY;
726 return compat_put_long(arg,
727 (bdi->ra_pages * PAGE_CACHE_SIZE) / 512);
728 case BLKROGET: /* compatible */
729 return compat_put_int(arg, bdev_read_only(bdev) != 0);
730 case BLKBSZGET_32: /* get the logical block size (cf. BLKSSZGET) */
731 return compat_put_int(arg, block_size(bdev));
732 case BLKSSZGET: /* get block device hardware sector size */
e1defc4f 733 return compat_put_int(arg, bdev_logical_block_size(bdev));
f58c4c0a
AB		 734 case BLKSECTGET:
735 return compat_put_ushort(arg,
ae03bf63 736 queue_max_sectors(bdev_get_queue(bdev)));
f58c4c0a
AB		 737 case BLKRASET: /* compatible, but no compat_ptr (!) */
738 case BLKFRASET:
739 if (!capable(CAP_SYS_ADMIN))
740 return -EACCES;
741 bdi = blk_get_backing_dev_info(bdev);
742 if (bdi == NULL)
743 return -ENOTTY;
744 bdi->ra_pages = (arg * 512) / PAGE_CACHE_SIZE;
745 return 0;
746 case BLKGETSIZE:
77304d2a 747 size = i_size_read(bdev->bd_inode);
45048d09 748 if ((size >> 9) > ~0UL)
f58c4c0a 749 return -EFBIG;
45048d09 750 return compat_put_ulong(arg, size >> 9);
f58c4c0a
AB		 751
752 case BLKGETSIZE64_32:
77304d2a 753 return compat_put_u64(arg, i_size_read(bdev->bd_inode));
171044d4
AB		 754
755 case BLKTRACESETUP32:
171044d4
AB		 756 case BLKTRACESTART: /* compatible */
757 case BLKTRACESTOP: /* compatible */
758 case BLKTRACETEARDOWN: /* compatible */
45048d09 759 ret = blk_trace_ioctl(bdev, cmd, compat_ptr(arg));
7199d4cd 760 return ret;
45048d09
AV		 761 default:
762 if (disk->fops->compat_ioctl)
763 ret = disk->fops->compat_ioctl(bdev, mode, cmd, arg);
764 if (ret == -ENOIOCTLCMD)
765 ret = compat_blkdev_driver_ioctl(bdev, mode, cmd, arg);
766 return ret;
767 }
f58c4c0a 768}
Clone of davem's net-next-2.6 tree