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/smp_lock.h>
12 #include <linux/types.h>
13 #include <linux/uaccess.h>
15 static int compat_put_ushort(unsigned long arg, unsigned short val)
17 return put_user(val, (unsigned short __user *)compat_ptr(arg));
20 static int compat_put_int(unsigned long arg, int val)
22 return put_user(val, (compat_int_t __user *)compat_ptr(arg));
25 static int compat_put_uint(unsigned long arg, unsigned int val)
27 return put_user(val, (compat_uint_t __user *)compat_ptr(arg));
30 static int compat_put_long(unsigned long arg, long val)
32 return put_user(val, (compat_long_t __user *)compat_ptr(arg));
35 static int compat_put_ulong(unsigned long arg, compat_ulong_t val)
37 return put_user(val, (compat_ulong_t __user *)compat_ptr(arg));
40 static int compat_put_u64(unsigned long arg, u64 val)
42 return put_user(val, (compat_u64 __user *)compat_ptr(arg));
45 struct compat_hd_geometry {
47 unsigned char sectors;
48 unsigned short cylinders;
52 static int compat_hdio_getgeo(struct gendisk *disk, struct block_device *bdev,
53 struct compat_hd_geometry __user *ugeo)
55 struct hd_geometry geo;
60 if (!disk->fops->getgeo)
64 * We need to set the startsect first, the driver may
65 * want to override it.
67 geo.start = get_start_sect(bdev);
68 ret = disk->fops->getgeo(bdev, &geo);
72 ret = copy_to_user(ugeo, &geo, 4);
73 ret |= __put_user(geo.start, &ugeo->start);
80 static int compat_hdio_ioctl(struct block_device *bdev, fmode_t mode,
81 unsigned int cmd, unsigned long arg)
83 mm_segment_t old_fs = get_fs();
85 unsigned int __user *uvp;
89 error = __blkdev_driver_ioctl(bdev, mode,
90 cmd, (unsigned long)(&kval));
94 uvp = compat_ptr(arg);
95 if (put_user(kval, uvp))
101 struct compat_cdrom_read_audio {
102 union cdrom_addr addr;
104 compat_int_t nframes;
108 struct compat_cdrom_generic_command {
109 unsigned char cmd[CDROM_PACKET_SIZE];
110 compat_caddr_t buffer;
111 compat_uint_t buflen;
113 compat_caddr_t sense;
114 unsigned char data_direction;
116 compat_int_t timeout;
117 compat_caddr_t reserved[1];
120 static int compat_cdrom_read_audio(struct block_device *bdev, fmode_t mode,
121 unsigned int cmd, unsigned long arg)
123 struct cdrom_read_audio __user *cdread_audio;
124 struct compat_cdrom_read_audio __user *cdread_audio32;
128 cdread_audio = compat_alloc_user_space(sizeof(*cdread_audio));
129 cdread_audio32 = compat_ptr(arg);
131 if (copy_in_user(&cdread_audio->addr,
132 &cdread_audio32->addr,
133 (sizeof(*cdread_audio32) -
134 sizeof(compat_caddr_t))))
137 if (get_user(data, &cdread_audio32->buf))
139 datap = compat_ptr(data);
140 if (put_user(datap, &cdread_audio->buf))
143 return __blkdev_driver_ioctl(bdev, mode, cmd,
144 (unsigned long)cdread_audio);
147 static int compat_cdrom_generic_command(struct block_device *bdev, fmode_t mode,
148 unsigned int cmd, unsigned long arg)
150 struct cdrom_generic_command __user *cgc;
151 struct compat_cdrom_generic_command __user *cgc32;
156 cgc = compat_alloc_user_space(sizeof(*cgc));
157 cgc32 = compat_ptr(arg);
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]))
176 return __blkdev_driver_ioctl(bdev, mode, cmd, (unsigned long)cgc);
179 struct compat_blkpg_ioctl_arg {
182 compat_int_t datalen;
186 static int compat_blkpg_ioctl(struct block_device *bdev, fmode_t mode,
187 unsigned int cmd, struct compat_blkpg_ioctl_arg __user *ua32)
189 struct blkpg_ioctl_arg __user *a = compat_alloc_user_space(sizeof(*a));
190 compat_caddr_t udata;
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);
205 return blkdev_ioctl(bdev, mode, cmd, (unsigned long)a);
208 #define BLKBSZGET_32 _IOR(0x12, 112, int)
209 #define BLKBSZSET_32 _IOW(0x12, 113, int)
210 #define BLKGETSIZE64_32 _IOR(0x12, 114, int)
212 struct compat_floppy_struct {
217 compat_uint_t stretch;
221 unsigned char fmt_gap;
222 const compat_caddr_t name;
225 struct compat_floppy_drive_params {
227 compat_ulong_t max_dtr;
231 compat_ulong_t spinup;
232 compat_ulong_t spindown;
233 unsigned char spindown_offset;
234 unsigned char select_delay;
236 unsigned char tracks;
237 compat_ulong_t timeout;
238 unsigned char interleave_sect;
239 struct floppy_max_errors max_errors;
243 compat_int_t checkfreq;
244 compat_int_t native_format;
247 struct compat_floppy_drive_struct {
249 compat_ulong_t spinup_date;
250 compat_ulong_t select_date;
251 compat_ulong_t first_read_date;
256 compat_int_t generation;
257 compat_int_t keep_data;
259 compat_int_t fd_device;
260 compat_int_t last_checked;
261 compat_caddr_t dmabuf;
262 compat_int_t bufblocks;
265 struct compat_floppy_fdc_state {
269 unsigned char version;
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];
281 struct 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;
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)
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 }
315 #define NR_FD_IOCTL_TRANS ARRAY_SIZE(fd_ioctl_trans_table)
317 static int compat_fd_ioctl(struct block_device *bdev, fmode_t mode,
318 unsigned int cmd, unsigned long arg)
320 mm_segment_t old_fs = get_fs();
322 unsigned int kcmd = 0;
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;
339 struct compat_floppy_struct __user *uf;
340 struct floppy_struct *f;
342 uf = compat_ptr(arg);
343 f = karg = kmalloc(sizeof(struct floppy_struct), GFP_KERNEL);
346 if (cmd == FDGETPRM32)
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);
368 struct compat_floppy_drive_params __user *uf;
369 struct floppy_drive_params *f;
371 uf = compat_ptr(arg);
372 f = karg = kmalloc(sizeof(struct floppy_drive_params), GFP_KERNEL);
375 if (cmd == FDGETDRVPRM32)
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);
403 case FDPOLLDRVSTAT32:
404 karg = kmalloc(sizeof(struct floppy_drive_struct), GFP_KERNEL);
409 karg = kmalloc(sizeof(struct floppy_fdc_state), GFP_KERNEL);
414 karg = kmalloc(sizeof(struct floppy_write_errors), GFP_KERNEL);
422 err = __blkdev_driver_ioctl(bdev, mode, kcmd, (unsigned long)karg);
429 struct floppy_struct *f = karg;
430 struct compat_floppy_struct __user *uf = compat_ptr(arg);
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);
446 struct compat_floppy_drive_params __user *uf;
447 struct floppy_drive_params *f = karg;
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);
472 case FDPOLLDRVSTAT32:
474 struct compat_floppy_drive_struct __user *uf;
475 struct floppy_drive_struct *f = karg;
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);
497 struct compat_floppy_fdc_state __user *uf;
498 struct floppy_fdc_state *f = karg;
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));
515 struct compat_floppy_write_errors __user *uf;
516 struct floppy_write_errors *f = karg;
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);
538 static int compat_blkdev_driver_ioctl(struct block_device *bdev, fmode_t mode,
539 unsigned cmd, unsigned long arg)
542 case HDIO_GET_UNMASKINTR:
543 case HDIO_GET_MULTCOUNT:
544 case HDIO_GET_KEEPSETTINGS:
546 case HDIO_GET_NOWERR:
549 case HDIO_GET_WCACHE:
550 case HDIO_GET_ACOUSTIC:
551 case HDIO_GET_ADDRESS:
552 case HDIO_GET_BUSSTATE:
553 return compat_hdio_ioctl(bdev, mode, cmd, arg);
560 case FDPOLLDRVSTAT32:
563 return compat_fd_ioctl(bdev, mode, cmd, arg);
565 return compat_cdrom_read_audio(bdev, mode, cmd, arg);
566 case CDROM_SEND_PACKET:
567 return compat_cdrom_generic_command(bdev, mode, cmd, arg);
570 * No handler required for the ones below, we just need to
571 * convert arg to a 64 bit pointer.
575 * 0x03 -- HD/IDE ioctl's used by hdparm and friends.
576 * Some need translations, these do not.
578 case HDIO_GET_IDENTITY:
579 case HDIO_DRIVE_TASK:
581 /* 0x330 is reserved -- it used to be HDIO_GETGEO_BIG */
583 /* 0x02 -- Floppy ioctls */
604 case CDROMPLAYTRKIND:
605 case CDROMREADTOCHDR:
606 case CDROMREADTOCENTRY:
612 case CDROMMULTISESSION:
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.
629 case CDROMREADCOOKED:
632 case DVD_READ_STRUCT:
633 case DVD_WRITE_STRUCT:
635 arg = (unsigned long)compat_ptr(arg);
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:
642 case HDIO_SET_NOWERR:
644 case HDIO_SET_PIO_MODE:
646 case HDIO_SET_WCACHE:
647 case HDIO_SET_ACOUSTIC:
648 case HDIO_SET_BUSSTATE:
649 case HDIO_SET_ADDRESS:
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:
661 /* unknown ioctl number */
665 return __blkdev_driver_ioctl(bdev, mode, cmd, arg);
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. */
671 long compat_blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg)
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;
678 struct backing_dev_info *bdi;
682 * O_NDELAY can be altered using fcntl(.., F_SETFL, ..), so we have
683 * to updated it before every ioctl.
685 if (file->f_flags & O_NDELAY)
686 mode |= FMODE_NDELAY;
688 mode &= ~FMODE_NDELAY;
692 return compat_hdio_getgeo(disk, bdev, compat_ptr(arg));
694 return compat_put_uint(arg, bdev_physical_block_size(bdev));
696 return compat_put_uint(arg, bdev_io_min(bdev));
698 return compat_put_uint(arg, bdev_io_opt(bdev));
700 return compat_put_int(arg, bdev_alignment_offset(bdev));
701 case BLKDISCARDZEROES:
702 return compat_put_uint(arg, bdev_discard_zeroes_data(bdev));
708 * the ones below are implemented in blkdev_locked_ioctl,
709 * but we call blkdev_ioctl, which gets the lock for us
712 return blkdev_ioctl(bdev, mode, cmd,
713 (unsigned long)compat_ptr(arg));
715 return blkdev_ioctl(bdev, mode, BLKBSZSET,
716 (unsigned long)compat_ptr(arg));
718 return compat_blkpg_ioctl(bdev, mode, cmd, compat_ptr(arg));
723 bdi = blk_get_backing_dev_info(bdev);
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 */
733 return compat_put_int(arg, bdev_logical_block_size(bdev));
735 return compat_put_ushort(arg,
736 queue_max_sectors(bdev_get_queue(bdev)));
737 case BLKRASET: /* compatible, but no compat_ptr (!) */
739 if (!capable(CAP_SYS_ADMIN))
741 bdi = blk_get_backing_dev_info(bdev);
744 bdi->ra_pages = (arg * 512) / PAGE_CACHE_SIZE;
747 size = bdev->bd_inode->i_size;
748 if ((size >> 9) > ~0UL)
750 return compat_put_ulong(arg, size >> 9);
752 case BLKGETSIZE64_32:
753 return compat_put_u64(arg, bdev->bd_inode->i_size);
755 case BLKTRACESETUP32:
756 case BLKTRACESTART: /* compatible */
757 case BLKTRACESTOP: /* compatible */
758 case BLKTRACETEARDOWN: /* compatible */
759 ret = blk_trace_ioctl(bdev, cmd, compat_ptr(arg));
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);