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>
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>
14 static int compat_put_ushort(unsigned long arg, unsigned short val)
16 return put_user(val, (unsigned short __user *)compat_ptr(arg));
19 static int compat_put_int(unsigned long arg, int val)
21 return put_user(val, (compat_int_t __user *)compat_ptr(arg));
24 static int compat_put_uint(unsigned long arg, unsigned int val)
26 return put_user(val, (compat_uint_t __user *)compat_ptr(arg));
29 static int compat_put_long(unsigned long arg, long val)
31 return put_user(val, (compat_long_t __user *)compat_ptr(arg));
34 static int compat_put_ulong(unsigned long arg, compat_ulong_t val)
36 return put_user(val, (compat_ulong_t __user *)compat_ptr(arg));
39 static int compat_put_u64(unsigned long arg, u64 val)
41 return put_user(val, (compat_u64 __user *)compat_ptr(arg));
44 struct compat_hd_geometry {
46 unsigned char sectors;
47 unsigned short cylinders;
51 static int compat_hdio_getgeo(struct gendisk *disk, struct block_device *bdev,
52 struct compat_hd_geometry __user *ugeo)
54 struct hd_geometry geo;
59 if (!disk->fops->getgeo)
63 * We need to set the startsect first, the driver may
64 * want to override it.
66 geo.start = get_start_sect(bdev);
67 ret = disk->fops->getgeo(bdev, &geo);
71 ret = copy_to_user(ugeo, &geo, 4);
72 ret |= __put_user(geo.start, &ugeo->start);
79 static int compat_hdio_ioctl(struct block_device *bdev, fmode_t mode,
80 unsigned int cmd, unsigned long arg)
82 mm_segment_t old_fs = get_fs();
84 unsigned int __user *uvp;
88 error = __blkdev_driver_ioctl(bdev, mode,
89 cmd, (unsigned long)(&kval));
93 uvp = compat_ptr(arg);
94 if (put_user(kval, uvp))
100 struct compat_cdrom_read_audio {
101 union cdrom_addr addr;
103 compat_int_t nframes;
107 struct compat_cdrom_generic_command {
108 unsigned char cmd[CDROM_PACKET_SIZE];
109 compat_caddr_t buffer;
110 compat_uint_t buflen;
112 compat_caddr_t sense;
113 unsigned char data_direction;
115 compat_int_t timeout;
116 compat_caddr_t reserved[1];
119 static int compat_cdrom_read_audio(struct block_device *bdev, fmode_t mode,
120 unsigned int cmd, unsigned long arg)
122 struct cdrom_read_audio __user *cdread_audio;
123 struct compat_cdrom_read_audio __user *cdread_audio32;
127 cdread_audio = compat_alloc_user_space(sizeof(*cdread_audio));
128 cdread_audio32 = compat_ptr(arg);
130 if (copy_in_user(&cdread_audio->addr,
131 &cdread_audio32->addr,
132 (sizeof(*cdread_audio32) -
133 sizeof(compat_caddr_t))))
136 if (get_user(data, &cdread_audio32->buf))
138 datap = compat_ptr(data);
139 if (put_user(datap, &cdread_audio->buf))
142 return __blkdev_driver_ioctl(bdev, mode, cmd,
143 (unsigned long)cdread_audio);
146 static int compat_cdrom_generic_command(struct block_device *bdev, fmode_t mode,
147 unsigned int cmd, unsigned long arg)
149 struct cdrom_generic_command __user *cgc;
150 struct compat_cdrom_generic_command __user *cgc32;
155 cgc = compat_alloc_user_space(sizeof(*cgc));
156 cgc32 = compat_ptr(arg);
158 if (copy_in_user(&cgc->cmd, &cgc32->cmd, sizeof(cgc->cmd)) ||
159 get_user(data, &cgc32->buffer) ||
160 put_user(compat_ptr(data), &cgc->buffer) ||
161 copy_in_user(&cgc->buflen, &cgc32->buflen,
162 (sizeof(unsigned int) + sizeof(int))) ||
163 get_user(data, &cgc32->sense) ||
164 put_user(compat_ptr(data), &cgc->sense) ||
165 get_user(dir, &cgc32->data_direction) ||
166 put_user(dir, &cgc->data_direction) ||
167 get_user(itmp, &cgc32->quiet) ||
168 put_user(itmp, &cgc->quiet) ||
169 get_user(itmp, &cgc32->timeout) ||
170 put_user(itmp, &cgc->timeout) ||
171 get_user(data, &cgc32->reserved[0]) ||
172 put_user(compat_ptr(data), &cgc->reserved[0]))
175 return __blkdev_driver_ioctl(bdev, mode, cmd, (unsigned long)cgc);
178 struct compat_blkpg_ioctl_arg {
181 compat_int_t datalen;
185 static int compat_blkpg_ioctl(struct block_device *bdev, fmode_t mode,
186 unsigned int cmd, struct compat_blkpg_ioctl_arg __user *ua32)
188 struct blkpg_ioctl_arg __user *a = compat_alloc_user_space(sizeof(*a));
189 compat_caddr_t udata;
193 err = get_user(n, &ua32->op);
194 err |= put_user(n, &a->op);
195 err |= get_user(n, &ua32->flags);
196 err |= put_user(n, &a->flags);
197 err |= get_user(n, &ua32->datalen);
198 err |= put_user(n, &a->datalen);
199 err |= get_user(udata, &ua32->data);
200 err |= put_user(compat_ptr(udata), &a->data);
204 return blkdev_ioctl(bdev, mode, cmd, (unsigned long)a);
207 #define BLKBSZGET_32 _IOR(0x12, 112, int)
208 #define BLKBSZSET_32 _IOW(0x12, 113, int)
209 #define BLKGETSIZE64_32 _IOR(0x12, 114, int)
211 struct compat_floppy_drive_params {
213 compat_ulong_t max_dtr;
217 compat_ulong_t spinup;
218 compat_ulong_t spindown;
219 unsigned char spindown_offset;
220 unsigned char select_delay;
222 unsigned char tracks;
223 compat_ulong_t timeout;
224 unsigned char interleave_sect;
225 struct floppy_max_errors max_errors;
229 compat_int_t checkfreq;
230 compat_int_t native_format;
233 struct compat_floppy_drive_struct {
235 compat_ulong_t spinup_date;
236 compat_ulong_t select_date;
237 compat_ulong_t first_read_date;
242 compat_int_t generation;
243 compat_int_t keep_data;
245 compat_int_t fd_device;
246 compat_int_t last_checked;
247 compat_caddr_t dmabuf;
248 compat_int_t bufblocks;
251 struct compat_floppy_fdc_state {
255 unsigned char version;
257 compat_ulong_t address;
258 unsigned int rawcmd:2;
259 unsigned int reset:1;
260 unsigned int need_configure:1;
261 unsigned int perp_mode:2;
262 unsigned int has_fifo:1;
263 unsigned int driver_version;
264 unsigned char track[4];
267 struct compat_floppy_write_errors {
268 unsigned int write_errors;
269 compat_ulong_t first_error_sector;
270 compat_int_t first_error_generation;
271 compat_ulong_t last_error_sector;
272 compat_int_t last_error_generation;
273 compat_uint_t badness;
276 #define FDSETPRM32 _IOW(2, 0x42, struct compat_floppy_struct)
277 #define FDDEFPRM32 _IOW(2, 0x43, struct compat_floppy_struct)
278 #define FDSETDRVPRM32 _IOW(2, 0x90, struct compat_floppy_drive_params)
279 #define FDGETDRVPRM32 _IOR(2, 0x11, struct compat_floppy_drive_params)
280 #define FDGETDRVSTAT32 _IOR(2, 0x12, struct compat_floppy_drive_struct)
281 #define FDPOLLDRVSTAT32 _IOR(2, 0x13, struct compat_floppy_drive_struct)
282 #define FDGETFDCSTAT32 _IOR(2, 0x15, struct compat_floppy_fdc_state)
283 #define FDWERRORGET32 _IOR(2, 0x17, struct compat_floppy_write_errors)
288 } fd_ioctl_trans_table[] = {
289 { FDSETPRM32, FDSETPRM },
290 { FDDEFPRM32, FDDEFPRM },
291 { FDGETPRM32, FDGETPRM },
292 { FDSETDRVPRM32, FDSETDRVPRM },
293 { FDGETDRVPRM32, FDGETDRVPRM },
294 { FDGETDRVSTAT32, FDGETDRVSTAT },
295 { FDPOLLDRVSTAT32, FDPOLLDRVSTAT },
296 { FDGETFDCSTAT32, FDGETFDCSTAT },
297 { FDWERRORGET32, FDWERRORGET }
300 #define NR_FD_IOCTL_TRANS ARRAY_SIZE(fd_ioctl_trans_table)
302 static int compat_fd_ioctl(struct block_device *bdev, fmode_t mode,
303 unsigned int cmd, unsigned long arg)
305 mm_segment_t old_fs = get_fs();
307 unsigned int kcmd = 0;
310 for (i = 0; i < NR_FD_IOCTL_TRANS; i++)
311 if (cmd == fd_ioctl_trans_table[i].cmd32) {
312 kcmd = fd_ioctl_trans_table[i].cmd;
324 struct compat_floppy_struct __user *uf;
325 struct floppy_struct *f;
327 uf = compat_ptr(arg);
328 f = karg = kmalloc(sizeof(struct floppy_struct), GFP_KERNEL);
331 if (cmd == FDGETPRM32)
333 err = __get_user(f->size, &uf->size);
334 err |= __get_user(f->sect, &uf->sect);
335 err |= __get_user(f->head, &uf->head);
336 err |= __get_user(f->track, &uf->track);
337 err |= __get_user(f->stretch, &uf->stretch);
338 err |= __get_user(f->gap, &uf->gap);
339 err |= __get_user(f->rate, &uf->rate);
340 err |= __get_user(f->spec1, &uf->spec1);
341 err |= __get_user(f->fmt_gap, &uf->fmt_gap);
342 err |= __get_user(name, &uf->name);
343 f->name = compat_ptr(name);
353 struct compat_floppy_drive_params __user *uf;
354 struct floppy_drive_params *f;
356 uf = compat_ptr(arg);
357 f = karg = kmalloc(sizeof(struct floppy_drive_params), GFP_KERNEL);
360 if (cmd == FDGETDRVPRM32)
362 err = __get_user(f->cmos, &uf->cmos);
363 err |= __get_user(f->max_dtr, &uf->max_dtr);
364 err |= __get_user(f->hlt, &uf->hlt);
365 err |= __get_user(f->hut, &uf->hut);
366 err |= __get_user(f->srt, &uf->srt);
367 err |= __get_user(f->spinup, &uf->spinup);
368 err |= __get_user(f->spindown, &uf->spindown);
369 err |= __get_user(f->spindown_offset, &uf->spindown_offset);
370 err |= __get_user(f->select_delay, &uf->select_delay);
371 err |= __get_user(f->rps, &uf->rps);
372 err |= __get_user(f->tracks, &uf->tracks);
373 err |= __get_user(f->timeout, &uf->timeout);
374 err |= __get_user(f->interleave_sect, &uf->interleave_sect);
375 err |= __copy_from_user(&f->max_errors, &uf->max_errors, sizeof(f->max_errors));
376 err |= __get_user(f->flags, &uf->flags);
377 err |= __get_user(f->read_track, &uf->read_track);
378 err |= __copy_from_user(f->autodetect, uf->autodetect, sizeof(f->autodetect));
379 err |= __get_user(f->checkfreq, &uf->checkfreq);
380 err |= __get_user(f->native_format, &uf->native_format);
388 case FDPOLLDRVSTAT32:
389 karg = kmalloc(sizeof(struct floppy_drive_struct), GFP_KERNEL);
394 karg = kmalloc(sizeof(struct floppy_fdc_state), GFP_KERNEL);
399 karg = kmalloc(sizeof(struct floppy_write_errors), GFP_KERNEL);
407 err = __blkdev_driver_ioctl(bdev, mode, kcmd, (unsigned long)karg);
414 struct floppy_struct *f = karg;
415 struct compat_floppy_struct __user *uf = compat_ptr(arg);
417 err = __put_user(f->size, &uf->size);
418 err |= __put_user(f->sect, &uf->sect);
419 err |= __put_user(f->head, &uf->head);
420 err |= __put_user(f->track, &uf->track);
421 err |= __put_user(f->stretch, &uf->stretch);
422 err |= __put_user(f->gap, &uf->gap);
423 err |= __put_user(f->rate, &uf->rate);
424 err |= __put_user(f->spec1, &uf->spec1);
425 err |= __put_user(f->fmt_gap, &uf->fmt_gap);
426 err |= __put_user((u64)f->name, (compat_caddr_t __user *)&uf->name);
431 struct compat_floppy_drive_params __user *uf;
432 struct floppy_drive_params *f = karg;
434 uf = compat_ptr(arg);
435 err = __put_user(f->cmos, &uf->cmos);
436 err |= __put_user(f->max_dtr, &uf->max_dtr);
437 err |= __put_user(f->hlt, &uf->hlt);
438 err |= __put_user(f->hut, &uf->hut);
439 err |= __put_user(f->srt, &uf->srt);
440 err |= __put_user(f->spinup, &uf->spinup);
441 err |= __put_user(f->spindown, &uf->spindown);
442 err |= __put_user(f->spindown_offset, &uf->spindown_offset);
443 err |= __put_user(f->select_delay, &uf->select_delay);
444 err |= __put_user(f->rps, &uf->rps);
445 err |= __put_user(f->tracks, &uf->tracks);
446 err |= __put_user(f->timeout, &uf->timeout);
447 err |= __put_user(f->interleave_sect, &uf->interleave_sect);
448 err |= __copy_to_user(&uf->max_errors, &f->max_errors, sizeof(f->max_errors));
449 err |= __put_user(f->flags, &uf->flags);
450 err |= __put_user(f->read_track, &uf->read_track);
451 err |= __copy_to_user(uf->autodetect, f->autodetect, sizeof(f->autodetect));
452 err |= __put_user(f->checkfreq, &uf->checkfreq);
453 err |= __put_user(f->native_format, &uf->native_format);
457 case FDPOLLDRVSTAT32:
459 struct compat_floppy_drive_struct __user *uf;
460 struct floppy_drive_struct *f = karg;
462 uf = compat_ptr(arg);
463 err = __put_user(f->flags, &uf->flags);
464 err |= __put_user(f->spinup_date, &uf->spinup_date);
465 err |= __put_user(f->select_date, &uf->select_date);
466 err |= __put_user(f->first_read_date, &uf->first_read_date);
467 err |= __put_user(f->probed_format, &uf->probed_format);
468 err |= __put_user(f->track, &uf->track);
469 err |= __put_user(f->maxblock, &uf->maxblock);
470 err |= __put_user(f->maxtrack, &uf->maxtrack);
471 err |= __put_user(f->generation, &uf->generation);
472 err |= __put_user(f->keep_data, &uf->keep_data);
473 err |= __put_user(f->fd_ref, &uf->fd_ref);
474 err |= __put_user(f->fd_device, &uf->fd_device);
475 err |= __put_user(f->last_checked, &uf->last_checked);
476 err |= __put_user((u64)f->dmabuf, &uf->dmabuf);
477 err |= __put_user((u64)f->bufblocks, &uf->bufblocks);
482 struct compat_floppy_fdc_state __user *uf;
483 struct floppy_fdc_state *f = karg;
485 uf = compat_ptr(arg);
486 err = __put_user(f->spec1, &uf->spec1);
487 err |= __put_user(f->spec2, &uf->spec2);
488 err |= __put_user(f->dtr, &uf->dtr);
489 err |= __put_user(f->version, &uf->version);
490 err |= __put_user(f->dor, &uf->dor);
491 err |= __put_user(f->address, &uf->address);
492 err |= __copy_to_user((char __user *)&uf->address + sizeof(uf->address),
493 (char *)&f->address + sizeof(f->address), sizeof(int));
494 err |= __put_user(f->driver_version, &uf->driver_version);
495 err |= __copy_to_user(uf->track, f->track, sizeof(f->track));
500 struct compat_floppy_write_errors __user *uf;
501 struct floppy_write_errors *f = karg;
503 uf = compat_ptr(arg);
504 err = __put_user(f->write_errors, &uf->write_errors);
505 err |= __put_user(f->first_error_sector, &uf->first_error_sector);
506 err |= __put_user(f->first_error_generation, &uf->first_error_generation);
507 err |= __put_user(f->last_error_sector, &uf->last_error_sector);
508 err |= __put_user(f->last_error_generation, &uf->last_error_generation);
509 err |= __put_user(f->badness, &uf->badness);
523 static int compat_blkdev_driver_ioctl(struct block_device *bdev, fmode_t mode,
524 unsigned cmd, unsigned long arg)
527 case HDIO_GET_UNMASKINTR:
528 case HDIO_GET_MULTCOUNT:
529 case HDIO_GET_KEEPSETTINGS:
531 case HDIO_GET_NOWERR:
534 case HDIO_GET_WCACHE:
535 case HDIO_GET_ACOUSTIC:
536 case HDIO_GET_ADDRESS:
537 case HDIO_GET_BUSSTATE:
538 return compat_hdio_ioctl(bdev, mode, cmd, arg);
545 case FDPOLLDRVSTAT32:
548 return compat_fd_ioctl(bdev, mode, cmd, arg);
550 return compat_cdrom_read_audio(bdev, mode, cmd, arg);
551 case CDROM_SEND_PACKET:
552 return compat_cdrom_generic_command(bdev, mode, cmd, arg);
555 * No handler required for the ones below, we just need to
556 * convert arg to a 64 bit pointer.
560 * 0x03 -- HD/IDE ioctl's used by hdparm and friends.
561 * Some need translations, these do not.
563 case HDIO_GET_IDENTITY:
564 case HDIO_DRIVE_TASK:
566 /* 0x330 is reserved -- it used to be HDIO_GETGEO_BIG */
568 /* 0x02 -- Floppy ioctls */
589 case CDROMPLAYTRKIND:
590 case CDROMREADTOCHDR:
591 case CDROMREADTOCENTRY:
597 case CDROMMULTISESSION:
604 case CDROM_DISC_STATUS:
605 case CDROM_CHANGER_NSLOTS:
606 case CDROM_GET_CAPABILITY:
607 /* Ignore cdrom.h about these next 5 ioctls, they absolutely do
608 * not take a struct cdrom_read, instead they take a struct cdrom_msf
609 * which is compatible.
614 case CDROMREADCOOKED:
617 case DVD_READ_STRUCT:
618 case DVD_WRITE_STRUCT:
620 arg = (unsigned long)compat_ptr(arg);
621 /* These intepret arg as an unsigned long, not as a pointer,
622 * so we must not do compat_ptr() conversion. */
623 case HDIO_SET_MULTCOUNT:
624 case HDIO_SET_UNMASKINTR:
625 case HDIO_SET_KEEPSETTINGS:
627 case HDIO_SET_NOWERR:
629 case HDIO_SET_PIO_MODE:
631 case HDIO_SET_WCACHE:
632 case HDIO_SET_ACOUSTIC:
633 case HDIO_SET_BUSSTATE:
634 case HDIO_SET_ADDRESS:
636 case CDROM_SET_OPTIONS:
637 case CDROM_CLEAR_OPTIONS:
638 case CDROM_SELECT_SPEED:
639 case CDROM_SELECT_DISC:
640 case CDROM_MEDIA_CHANGED:
641 case CDROM_DRIVE_STATUS:
646 /* unknown ioctl number */
650 return __blkdev_driver_ioctl(bdev, mode, cmd, arg);
653 /* Most of the generic ioctls are handled in the normal fallback path.
654 This assumes the blkdev's low level compat_ioctl always returns
655 ENOIOCTLCMD for unknown ioctls. */
656 long compat_blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg)
658 int ret = -ENOIOCTLCMD;
659 struct inode *inode = file->f_mapping->host;
660 struct block_device *bdev = inode->i_bdev;
661 struct gendisk *disk = bdev->bd_disk;
662 fmode_t mode = file->f_mode;
663 struct backing_dev_info *bdi;
667 * O_NDELAY can be altered using fcntl(.., F_SETFL, ..), so we have
668 * to updated it before every ioctl.
670 if (file->f_flags & O_NDELAY)
671 mode |= FMODE_NDELAY;
673 mode &= ~FMODE_NDELAY;
677 return compat_hdio_getgeo(disk, bdev, compat_ptr(arg));
679 return compat_put_uint(arg, bdev_physical_block_size(bdev));
681 return compat_put_uint(arg, bdev_io_min(bdev));
683 return compat_put_uint(arg, bdev_io_opt(bdev));
685 return compat_put_int(arg, bdev_alignment_offset(bdev));
686 case BLKDISCARDZEROES:
687 return compat_put_uint(arg, bdev_discard_zeroes_data(bdev));
693 * the ones below are implemented in blkdev_locked_ioctl,
694 * but we call blkdev_ioctl, which gets the lock for us
697 return blkdev_ioctl(bdev, mode, cmd,
698 (unsigned long)compat_ptr(arg));
700 return blkdev_ioctl(bdev, mode, BLKBSZSET,
701 (unsigned long)compat_ptr(arg));
703 return compat_blkpg_ioctl(bdev, mode, cmd, compat_ptr(arg));
708 bdi = blk_get_backing_dev_info(bdev);
711 return compat_put_long(arg,
712 (bdi->ra_pages * PAGE_CACHE_SIZE) / 512);
713 case BLKROGET: /* compatible */
714 return compat_put_int(arg, bdev_read_only(bdev) != 0);
715 case BLKBSZGET_32: /* get the logical block size (cf. BLKSSZGET) */
716 return compat_put_int(arg, block_size(bdev));
717 case BLKSSZGET: /* get block device hardware sector size */
718 return compat_put_int(arg, bdev_logical_block_size(bdev));
720 return compat_put_ushort(arg,
721 queue_max_sectors(bdev_get_queue(bdev)));
722 case BLKRASET: /* compatible, but no compat_ptr (!) */
724 if (!capable(CAP_SYS_ADMIN))
726 bdi = blk_get_backing_dev_info(bdev);
729 bdi->ra_pages = (arg * 512) / PAGE_CACHE_SIZE;
732 size = i_size_read(bdev->bd_inode);
733 if ((size >> 9) > ~0UL)
735 return compat_put_ulong(arg, size >> 9);
737 case BLKGETSIZE64_32:
738 return compat_put_u64(arg, i_size_read(bdev->bd_inode));
740 case BLKTRACESETUP32:
741 case BLKTRACESTART: /* compatible */
742 case BLKTRACESTOP: /* compatible */
743 case BLKTRACETEARDOWN: /* compatible */
744 ret = blk_trace_ioctl(bdev, cmd, compat_ptr(arg));
747 if (disk->fops->compat_ioctl)
748 ret = disk->fops->compat_ioctl(bdev, mode, cmd, arg);
749 if (ret == -ENOIOCTLCMD)
750 ret = compat_blkdev_driver_ioctl(bdev, mode, cmd, arg);