#include <linux/blkdev.h> #include <linux/blkpg.h> #include <linux/blktrace_api.h> #include <linux/cdrom.h> #include <linux/compat.h> #include <linux/elevator.h> #include <linux/fd.h> #include <linux/hdreg.h> #include <linux/slab.h> #include <linux/syscalls.h> #include <linux/types.h> #include <linux/uaccess.h> static int compat_put_ushort(unsigned long arg, unsigned short val) { return put_user(val, (unsigned short __user *)compat_ptr(arg)); } static int compat_put_int(unsigned long arg, int val) { return put_user(val, (compat_int_t __user *)compat_ptr(arg)); } static int compat_put_uint(unsigned long arg, unsigned int val) { return put_user(val, (compat_uint_t __user *)compat_ptr(arg)); } static int compat_put_long(unsigned long arg, long val) { return put_user(val, (compat_long_t __user *)compat_ptr(arg)); } static int compat_put_ulong(unsigned long arg, compat_ulong_t val) { return put_user(val, (compat_ulong_t __user *)compat_ptr(arg)); } static int compat_put_u64(unsigned long arg, u64 val) { return put_user(val, (compat_u64 __user *)compat_ptr(arg)); } struct compat_hd_geometry { unsigned char heads; unsigned char sectors; unsigned short cylinders; u32 start; }; static int compat_hdio_getgeo(struct gendisk *disk, struct block_device *bdev, struct compat_hd_geometry __user *ugeo) { struct hd_geometry geo; int ret; if (!ugeo) return -EINVAL; if (!disk->fops->getgeo) return -ENOTTY; /* * We need to set the startsect first, the driver may * want to override it. */ geo.start = get_start_sect(bdev); ret = disk->fops->getgeo(bdev, &geo); if (ret) return ret; ret = copy_to_user(ugeo, &geo, 4); ret |= __put_user(geo.start, &ugeo->start); if (ret) ret = -EFAULT; return ret; } static int compat_hdio_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd, unsigned long arg) { mm_segment_t old_fs = get_fs(); unsigned long kval; unsigned int __user *uvp; int error; set_fs(KERNEL_DS); error = __blkdev_driver_ioctl(bdev, mode, cmd, (unsigned long)(&kval)); set_fs(old_fs); if (error == 0) { uvp = compat_ptr(arg); if (put_user(kval, uvp)) error = -EFAULT; } return error; } struct compat_cdrom_read_audio { union cdrom_addr addr; u8 addr_format; compat_int_t nframes; compat_caddr_t buf; }; struct compat_cdrom_generic_command { unsigned char cmd[CDROM_PACKET_SIZE]; compat_caddr_t buffer; compat_uint_t buflen; compat_int_t stat; compat_caddr_t sense; unsigned char data_direction; compat_int_t quiet; compat_int_t timeout; compat_caddr_t reserved[1]; }; static int compat_cdrom_read_audio(struct block_device *bdev, fmode_t mode, unsigned int cmd, unsigned long arg) { struct cdrom_read_audio __user *cdread_audio; struct compat_cdrom_read_audio __user *cdread_audio32; __u32 data; void __user *datap; cdread_audio = compat_alloc_user_space(sizeof(*cdread_audio)); cdread_audio32 = compat_ptr(arg); if (copy_in_user(&cdread_audio->addr, &cdread_audio32->addr, (sizeof(*cdread_audio32) - sizeof(compat_caddr_t)))) return -EFAULT; if (get_user(data, &cdread_audio32->buf)) return -EFAULT; datap = compat_ptr(data); if (put_user(datap, &cdread_audio->buf)) return -EFAULT; return __blkdev_driver_ioctl(bdev, mode, cmd, (unsigned long)cdread_audio); } static int compat_cdrom_generic_command(struct block_device *bdev, fmode_t mode, unsigned int cmd, unsigned long arg) { struct cdrom_generic_command __user *cgc; struct compat_cdrom_generic_command __user *cgc32; u32 data; unsigned char dir; int itmp; cgc = compat_alloc_user_space(sizeof(*cgc)); cgc32 = compat_ptr(arg); if (copy_in_user(&cgc->cmd, &cgc32->cmd, sizeof(cgc->cmd)) || get_user(data, &cgc32->buffer) || put_user(compat_ptr(data), &cgc->buffer) || copy_in_user(&cgc->buflen, &cgc32->buflen, (sizeof(unsigned int) + sizeof(int))) || get_user(data, &cgc32->sense) || put_user(compat_ptr(data), &cgc->sense) || get_user(dir, &cgc32->data_direction) || put_user(dir, &cgc->data_direction) || get_user(itmp, &cgc32->quiet) || put_user(itmp, &cgc->quiet) || get_user(itmp, &cgc32->timeout) || put_user(itmp, &cgc->timeout) || get_user(data, &cgc32->reserved[0]) || put_user(compat_ptr(data), &cgc->reserved[0])) return -EFAULT; return __blkdev_driver_ioctl(bdev, mode, cmd, (unsigned long)cgc); } struct compat_blkpg_ioctl_arg { compat_int_t op; compat_int_t flags; compat_int_t datalen; compat_caddr_t data; }; static int compat_blkpg_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd, struct compat_blkpg_ioctl_arg __user *ua32) { struct blkpg_ioctl_arg __user *a = compat_alloc_user_space(sizeof(*a)); compat_caddr_t udata; compat_int_t n; int err; err = get_user(n, &ua32->op); err |= put_user(n, &a->op); err |= get_user(n, &ua32->flags); err |= put_user(n, &a->flags); err |= get_user(n, &ua32->datalen); err |= put_user(n, &a->datalen); err |= get_user(udata, &ua32->data); err |= put_user(compat_ptr(udata), &a->data); if (err) return err; return blkdev_ioctl(bdev, mode, cmd, (unsigned long)a); } #define BLKBSZGET_32 _IOR(0x12, 112, int) #define BLKBSZSET_32 _IOW(0x12, 113, int) #define BLKGETSIZE64_32 _IOR(0x12, 114, int) struct compat_floppy_drive_params { char cmos; compat_ulong_t max_dtr; compat_ulong_t hlt; compat_ulong_t hut; compat_ulong_t srt; compat_ulong_t spinup; compat_ulong_t spindown; unsigned char spindown_offset; unsigned char select_delay; unsigned char rps; unsigned char tracks; compat_ulong_t timeout; unsigned char interleave_sect; struct floppy_max_errors max_errors; char flags; char read_track; short autodetect[8]; compat_int_t checkfreq; compat_int_t native_format; }; struct compat_floppy_drive_struct { signed char flags; compat_ulong_t spinup_date; compat_ulong_t select_date; compat_ulong_t first_read_date; short probed_format; short track; short maxblock; short maxtrack; compat_int_t generation; compat_int_t keep_data; compat_int_t fd_ref; compat_int_t fd_device; compat_int_t last_checked; compat_caddr_t dmabuf; compat_int_t bufblocks; }; struct compat_floppy_fdc_state { compat_int_t spec1; compat_int_t spec2; compat_int_t dtr; unsigned char version; unsigned char dor; compat_ulong_t address; unsigned int rawcmd:2; unsigned int reset:1; unsigned int need_configure:1; unsigned int perp_mode:2; unsigned int has_fifo:1; unsigned int driver_version; unsigned char track[4]; }; struct compat_floppy_write_errors { unsigned int write_errors; compat_ulong_t first_error_sector; compat_int_t first_error_generation; compat_ulong_t last_error_sector; compat_int_t last_error_generation; compat_uint_t badness; }; #define FDSETPRM32 _IOW(2, 0x42, struct compat_floppy_struct) #define FDDEFPRM32 _IOW(2, 0x43, struct compat_floppy_struct) #define FDSETDRVPRM32 _IOW(2, 0x90, struct compat_floppy_drive_params) #define FDGETDRVPRM32 _IOR(2, 0x11, struct compat_floppy_drive_params) #define FDGETDRVSTAT32 _IOR(2, 0x12, struct compat_floppy_drive_struct) #define FDPOLLDRVSTAT32 _IOR(2, 0x13, struct compat_floppy_drive_struct) #define FDGETFDCSTAT32 _IOR(2, 0x15, struct compat_floppy_fdc_state) #define FDWERRORGET32 _IOR(2, 0x17, struct compat_floppy_write_errors) static struct { unsigned int cmd32; unsigned int cmd; } fd_ioctl_trans_table[] = { { FDSETPRM32, FDSETPRM }, { FDDEFPRM32, FDDEFPRM }, { FDGETPRM32, FDGETPRM }, { FDSETDRVPRM32, FDSETDRVPRM }, { FDGETDRVPRM32, FDGETDRVPRM }, { FDGETDRVSTAT32, FDGETDRVSTAT }, { FDPOLLDRVSTAT32, FDPOLLDRVSTAT }, { FDGETFDCSTAT32, FDGETFDCSTAT }, { FDWERRORGET32, FDWERRORGET } }; #define NR_FD_IOCTL_TRANS ARRAY_SIZE(fd_ioctl_trans_table) static int compat_fd_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd, unsigned long arg) { mm_segment_t old_fs = get_fs(); void *karg = NULL; unsigned int kcmd = 0; int i, err; for (i = 0; i < NR_FD_IOCTL_TRANS; i++) if (cmd == fd_ioctl_trans_table[i].cmd32) { kcmd = fd_ioctl_trans_table[i].cmd; break; } if (!kcmd) return -EINVAL; switch (cmd) { case FDSETPRM32: case FDDEFPRM32: case FDGETPRM32: { compat_uptr_t name; struct compat_floppy_struct __user *uf; struct floppy_struct *f; uf = compat_ptr(arg); f = karg = kmalloc(sizeof(struct floppy_struct), GFP_KERNEL); if (!karg) return -ENOMEM; if (cmd == FDGETPRM32) break; err = __get_user(f->size, &uf->size); err |= __get_user(f->sect, &uf->sect); err |= __get_user(f->head, &uf->head); err |= __get_user(f->track, &uf->track); err |= __get_user(f->stretch, &uf->stretch); err |= __get_user(f->gap, &uf->gap); err |= __get_user(f->rate, &uf->rate); err |= __get_user(f->spec1, &uf->spec1); err |= __get_user(f->fmt_gap, &uf->fmt_gap); err |= __get_user(name, &uf->name); f->name = compat_ptr(name); if (err) { err = -EFAULT; goto out; } break; } case FDSETDRVPRM32: case FDGETDRVPRM32: { struct compat_floppy_drive_params __user *uf; struct floppy_drive_params *f; uf = compat_ptr(arg); f = karg = kmalloc(sizeof(struct floppy_drive_params), GFP_KERNEL); if (!karg) return -ENOMEM; if (cmd == FDGETDRVPRM32) break; err = __get_user(f->cmos, &uf->cmos); err |= __get_user(f->max_dtr, &uf->max_dtr); err |= __get_user(f->hlt, &uf->hlt); err |= __get_user(f->hut, &uf->hut); err |= __get_user(f->srt, &uf->srt); err |= __get_user(f->spinup, &uf->spinup); err |= __get_user(f->spindown, &uf->spindown); err |= __get_user(f->spindown_offset, &uf->spindown_offset); err |= __get_user(f->select_delay, &uf->select_delay); err |= __get_user(f->rps, &uf->rps); err |= __get_user(f->tracks, &uf->tracks); err |= __get_user(f->timeout, &uf->timeout); err |= __get_user(f->interleave_sect, &uf->interleave_sect); err |= __copy_from_user(&f->max_errors, &uf->max_errors, sizeof(f->max_errors)); err |= __get_user(f->flags, &uf->flags); err |= __get_user(f->read_track, &uf->read_track); err |= __copy_from_user(f->autodetect, uf->autodetect, sizeof(f->autodetect)); err |= __get_user(f->checkfreq, &uf->checkfreq); err |= __get_user(f->native_format, &uf->native_format); if (err) { err = -EFAULT; goto out; } break; } case FDGETDRVSTAT32: case FDPOLLDRVSTAT32: karg = kmalloc(sizeof(struct floppy_drive_struct), GFP_KERNEL); if (!karg) return -ENOMEM; break; case FDGETFDCSTAT32: karg = kmalloc(sizeof(struct floppy_fdc_state), GFP_KERNEL); if (!karg) return -ENOMEM; break; case FDWERRORGET32: karg = kmalloc(sizeof(struct floppy_write_errors), GFP_KERNEL); if (!karg) return -ENOMEM; break; default: return -EINVAL; } set_fs(KERNEL_DS); err = __blkdev_driver_ioctl(bdev, mode, kcmd, (unsigned long)karg); set_fs(old_fs); if (err) goto out; switch (cmd) { case FDGETPRM32: { struct floppy_struct *f = karg; struct compat_floppy_struct __user *uf = compat_ptr(arg); err = __put_user(f->size, &uf->size); err |= __put_user(f->sect, &uf->sect); err |= __put_user(f->head, &uf->head); err |= __put_user(f->track, &uf->track); err |= __put_user(f->stretch, &uf->stretch); err |= __put_user(f->gap, &uf->gap); err |= __put_user(f->rate, &uf->rate); err |= __put_user(f->spec1, &uf->spec1); err |= __put_user(f->fmt_gap, &uf->fmt_gap); err |= __put_user((u64)f->name, (compat_caddr_t __user *)&uf->name); break; } case FDGETDRVPRM32: { struct compat_floppy_drive_params __user *uf; struct floppy_drive_params *f = karg; uf = compat_ptr(arg); err = __put_user(f->cmos, &uf->cmos); err |= __put_user(f->max_dtr, &uf->max_dtr); err |= __put_user(f->hlt, &uf->hlt); err |= __put_user(f->hut, &uf->hut); err |= __put_user(f->srt, &uf->srt); err |= __put_user(f->spinup, &uf->spinup); err |= __put_user(f->spindown, &uf->spindown); err |= __put_user(f->spindown_offset, &uf->spindown_offset); err |= __put_user(f->select_delay, &uf->select_delay); err |= __put_user(f->rps, &uf->rps); err |= __put_user(f->tracks, &uf->tracks); err |= __put_user(f->timeout, &uf->timeout); err |= __put_user(f->interleave_sect, &uf->interleave_sect); err |= __copy_to_user(&uf->max_errors, &f->max_errors, sizeof(f->max_errors)); err |= __put_user(f->flags, &uf->flags); err |= __put_user(f->read_track, &uf->read_track); err |= __copy_to_user(uf->autodetect, f->autodetect, sizeof(f->autodetect)); err |= __put_user(f->checkfreq, &uf->checkfreq); err |= __put_user(f->native_format, &uf->native_format); break; } case FDGETDRVSTAT32: case FDPOLLDRVSTAT32: { struct compat_floppy_drive_struct __user *uf; struct floppy_drive_struct *f = karg; uf = compat_ptr(arg); err = __put_user(f->flags, &uf->flags); err |= __put_user(f->spinup_date, &uf->spinup_date); err |= __put_user(f->select_date, &uf->select_date); err |= __put_user(f->first_read_date, &uf->first_read_date); err |= __put_user(f->probed_format, &uf->probed_format); err |= __put_user(f->track, &uf->track); err |= __put_user(f->maxblock, &uf->maxblock); err |= __put_user(f->maxtrack, &uf->maxtrack); err |= __put_user(f->generation, &uf->generation); err |= __put_user(f->keep_data, &uf->keep_data); err |= __put_user(f->fd_ref, &uf->fd_ref); err |= __put_user(f->fd_device, &uf->fd_device); err |= __put_user(f->last_checked, &uf->last_checked); err |= __put_user((u64)f->dmabuf, &uf->dmabuf); err |= __put_user((u64)f->bufblocks, &uf->bufblocks); break; } case FDGETFDCSTAT32: { struct compat_floppy_fdc_state __user *uf; struct floppy_fdc_state *f = karg; uf = compat_ptr(arg); err = __put_user(f->spec1, &uf->spec1); err |= __put_user(f->spec2, &uf->spec2); err |= __put_user(f->dtr, &uf->dtr); err |= __put_user(f->version, &uf->version); err |= __put_user(f->dor, &uf->dor); err |= __put_user(f->address, &uf->address); err |= __copy_to_user((char __user *)&uf->address + sizeof(uf->address), (char *)&f->address + sizeof(f->address), sizeof(int)); err |= __put_user(f->driver_version, &uf->driver_version); err |= __copy_to_user(uf->track, f->track, sizeof(f->track)); break; } case FDWERRORGET32: { struct compat_floppy_write_errors __user *uf; struct floppy_write_errors *f = karg; uf = compat_ptr(arg); err = __put_user(f->write_errors, &uf->write_errors); err |= __put_user(f->first_error_sector, &uf->first_error_sector); err |= __put_user(f->first_error_generation, &uf->first_error_generation); err |= __put_user(f->last_error_sector, &uf->last_error_sector); err |= __put_user(f->last_error_generation, &uf->last_error_generation); err |= __put_user(f->badness, &uf->badness); break; } default: break; } if (err) err = -EFAULT; out: kfree(karg); return err; } static int compat_blkdev_driver_ioctl(struct block_device *bdev, fmode_t mode, unsigned cmd, unsigned long arg) { switch (cmd) { case HDIO_GET_UNMASKINTR: case HDIO_GET_MULTCOUNT: case HDIO_GET_KEEPSETTINGS: case HDIO_GET_32BIT: case HDIO_GET_NOWERR: case HDIO_GET_DMA: case HDIO_GET_NICE: case HDIO_GET_WCACHE: case HDIO_GET_ACOUSTIC: case HDIO_GET_ADDRESS: case HDIO_GET_BUSSTATE: return compat_hdio_ioctl(bdev, mode, cmd, arg); case FDSETPRM32: case FDDEFPRM32: case FDGETPRM32: case FDSETDRVPRM32: case FDGETDRVPRM32: case FDGETDRVSTAT32: case FDPOLLDRVSTAT32: case FDGETFDCSTAT32: case FDWERRORGET32: return compat_fd_ioctl(bdev, mode, cmd, arg); case CDROMREADAUDIO: return compat_cdrom_read_audio(bdev, mode, cmd, arg); case CDROM_SEND_PACKET: return compat_cdrom_generic_command(bdev, mode, cmd, arg); /* * No handler required for the ones below, we just need to * convert arg to a 64 bit pointer. */ case BLKSECTSET: /* * 0x03 -- HD/IDE ioctl's used by hdparm and friends. * Some need translations, these do not. */ case HDIO_GET_IDENTITY: case HDIO_DRIVE_TASK: case HDIO_DRIVE_CMD: /* 0x330 is reserved -- it used to be HDIO_GETGEO_BIG */ case 0x330: /* 0x02 -- Floppy ioctls */ case FDMSGON: case FDMSGOFF: case FDSETEMSGTRESH: case FDFLUSH: case FDWERRORCLR: case FDSETMAXERRS: case FDGETMAXERRS: case FDGETDRVTYP: case FDEJECT: case FDCLRPRM: case FDFMTBEG: case FDFMTEND: case FDRESET: case FDTWADDLE: case FDFMTTRK: case FDRAWCMD: /* CDROM stuff */ case CDROMPAUSE: case CDROMRESUME: case CDROMPLAYMSF: case CDROMPLAYTRKIND: case CDROMREADTOCHDR: case CDROMREADTOCENTRY: case CDROMSTOP: case CDROMSTART: case CDROMEJECT: case CDROMVOLCTRL: case CDROMSUBCHNL: case CDROMMULTISESSION: case CDROM_GET_MCN: case CDROMRESET: case CDROMVOLREAD: case CDROMSEEK: case CDROMPLAYBLK: case CDROMCLOSETRAY: case CDROM_DISC_STATUS: case CDROM_CHANGER_NSLOTS: case CDROM_GET_CAPABILITY: /* Ignore cdrom.h about these next 5 ioctls, they absolutely do * not take a struct cdrom_read, instead they take a struct cdrom_msf * which is compatible. */ case CDROMREADMODE2: case CDROMREADMODE1: case CDROMREADRAW: case CDROMREADCOOKED: case CDROMREADALL: /* DVD ioctls */ case DVD_READ_STRUCT: case DVD_WRITE_STRUCT: case DVD_AUTH: arg = (unsigned long)compat_ptr(arg); /* These intepret arg as an unsigned long, not as a pointer, * so we must not do compat_ptr() conversion. */ case HDIO_SET_MULTCOUNT: case HDIO_SET_UNMASKINTR: case HDIO_SET_KEEPSETTINGS: case HDIO_SET_32BIT: case HDIO_SET_NOWERR: case HDIO_SET_DMA: case HDIO_SET_PIO_MODE: case HDIO_SET_NICE: case HDIO_SET_WCACHE: case HDIO_SET_ACOUSTIC: case HDIO_SET_BUSSTATE: case HDIO_SET_ADDRESS: case CDROMEJECT_SW: case CDROM_SET_OPTIONS: case CDROM_CLEAR_OPTIONS: case CDROM_SELECT_SPEED: case CDROM_SELECT_DISC: case CDROM_MEDIA_CHANGED: case CDROM_DRIVE_STATUS: case CDROM_LOCKDOOR: case CDROM_DEBUG: break; default: /* unknown ioctl number */ return -ENOIOCTLCMD; } return __blkdev_driver_ioctl(bdev, mode, cmd, arg); } /* Most of the generic ioctls are handled in the normal fallback path. This assumes the blkdev's low level compat_ioctl always returns ENOIOCTLCMD for unknown ioctls. */ long compat_blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg) { int ret = -ENOIOCTLCMD; struct inode *inode = file->f_mapping->host; struct block_device *bdev = inode->i_bdev; struct gendisk *disk = bdev->bd_disk; fmode_t mode = file->f_mode; struct backing_dev_info *bdi; loff_t size; /* * O_NDELAY can be altered using fcntl(.., F_SETFL, ..), so we have * to updated it before every ioctl. */ if (file->f_flags & O_NDELAY) mode |= FMODE_NDELAY; else mode &= ~FMODE_NDELAY; switch (cmd) { case HDIO_GETGEO: return compat_hdio_getgeo(disk, bdev, compat_ptr(arg)); case BLKPBSZGET: return compat_put_uint(arg, bdev_physical_block_size(bdev)); case BLKIOMIN: return compat_put_uint(arg, bdev_io_min(bdev)); case BLKIOOPT: return compat_put_uint(arg, bdev_io_opt(bdev)); case BLKALIGNOFF: return compat_put_int(arg, bdev_alignment_offset(bdev)); case BLKDISCARDZEROES: return compat_put_uint(arg, bdev_discard_zeroes_data(bdev)); case BLKFLSBUF: case BLKROSET: case BLKDISCARD: case BLKSECDISCARD: /* * the ones below are implemented in blkdev_locked_ioctl, * but we call blkdev_ioctl, which gets the lock for us */ case BLKRRPART: return blkdev_ioctl(bdev, mode, cmd, (unsigned long)compat_ptr(arg)); case BLKBSZSET_32: return blkdev_ioctl(bdev, mode, BLKBSZSET, (unsigned long)compat_ptr(arg)); case BLKPG: return compat_blkpg_ioctl(bdev, mode, cmd, compat_ptr(arg)); case BLKRAGET: case BLKFRAGET: if (!arg) return -EINVAL; bdi = blk_get_backing_dev_info(bdev); if (bdi == NULL) return -ENOTTY; return compat_put_long(arg, (bdi->ra_pages * PAGE_CACHE_SIZE) / 512); case BLKROGET: /* compatible */ return compat_put_int(arg, bdev_read_only(bdev) != 0); case BLKBSZGET_32: /* get the logical block size (cf. BLKSSZGET) */ return compat_put_int(arg, block_size(bdev)); case BLKSSZGET: /* get block device hardware sector size */ return compat_put_int(arg, bdev_logical_block_size(bdev)); case BLKSECTGET: return compat_put_ushort(arg, queue_max_sectors(bdev_get_queue(bdev))); case BLKROTATIONAL: return compat_put_ushort(arg, !blk_queue_nonrot(bdev_get_queue(bdev))); case BLKRASET: /* compatible, but no compat_ptr (!) */ case BLKFRASET: if (!capable(CAP_SYS_ADMIN)) return -EACCES; bdi = blk_get_backing_dev_info(bdev); if (bdi == NULL) return -ENOTTY; bdi->ra_pages = (arg * 512) / PAGE_CACHE_SIZE; return 0; case BLKGETSIZE: size = i_size_read(bdev->bd_inode); if ((size >> 9) > ~0UL) return -EFBIG; return compat_put_ulong(arg, size >> 9); case BLKGETSIZE64_32: return compat_put_u64(arg, i_size_read(bdev->bd_inode)); case BLKTRACESETUP32: case BLKTRACESTART: /* compatible */ case BLKTRACESTOP: /* compatible */ case BLKTRACETEARDOWN: /* compatible */ ret = blk_trace_ioctl(bdev, cmd, compat_ptr(arg)); return ret; default: if (disk->fops->compat_ioctl) ret = disk->fops->compat_ioctl(bdev, mode, cmd, arg); if (ret == -ENOIOCTLCMD) ret = compat_blkdev_driver_ioctl(bdev, mode, cmd, arg); return ret; } }