-static int idedisk_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
-{
- unsigned long flags;
- struct block_device *bdev = inode->i_bdev;
- struct ide_disk_obj *idkp = ide_disk_g(bdev->bd_disk);
- ide_drive_t *drive = idkp->drive;
- int err, (*getfunc)(ide_drive_t *), (*setfunc)(ide_drive_t *, int);
-
- switch (cmd) {
- case HDIO_GET_ADDRESS: getfunc = get_lba_addressing; goto read_val;
- case HDIO_GET_MULTCOUNT: getfunc = get_multcount; goto read_val;
- case HDIO_GET_NOWERR: getfunc = get_nowerr; goto read_val;
- case HDIO_GET_WCACHE: getfunc = get_wcache; goto read_val;
- case HDIO_GET_ACOUSTIC: getfunc = get_acoustic; goto read_val;
- case HDIO_SET_ADDRESS: setfunc = set_lba_addressing; goto set_val;
- case HDIO_SET_MULTCOUNT: setfunc = set_multcount; goto set_val;
- case HDIO_SET_NOWERR: setfunc = set_nowerr; goto set_val;
- case HDIO_SET_WCACHE: setfunc = set_wcache; goto set_val;
- case HDIO_SET_ACOUSTIC: setfunc = set_acoustic; goto set_val;
- }
-
- return generic_ide_ioctl(drive, file, bdev, cmd, arg);
-
-read_val:
- mutex_lock(&ide_setting_mtx);
- spin_lock_irqsave(&ide_lock, flags);
- err = getfunc(drive);
- spin_unlock_irqrestore(&ide_lock, flags);
- mutex_unlock(&ide_setting_mtx);
- return err >= 0 ? put_user(err, (long __user *)arg) : err;
-
-set_val:
- if (bdev != bdev->bd_contains)
- err = -EINVAL;
- else {
- if (!capable(CAP_SYS_ADMIN))
- err = -EACCES;
- else {
- mutex_lock(&ide_setting_mtx);
- err = setfunc(drive, arg);
- mutex_unlock(&ide_setting_mtx);
- }
- }
- return err;
-}
-