| /* |
| * IDE ioctls handling. |
| */ |
| |
| #include <linux/export.h> |
| #include <linux/hdreg.h> |
| #include <linux/ide.h> |
| #include <linux/slab.h> |
| |
| static const struct ide_ioctl_devset ide_ioctl_settings[] = { |
| { HDIO_GET_32BIT, HDIO_SET_32BIT, &ide_devset_io_32bit }, |
| { HDIO_GET_KEEPSETTINGS, HDIO_SET_KEEPSETTINGS, &ide_devset_keepsettings }, |
| { HDIO_GET_UNMASKINTR, HDIO_SET_UNMASKINTR, &ide_devset_unmaskirq }, |
| { HDIO_GET_DMA, HDIO_SET_DMA, &ide_devset_using_dma }, |
| { -1, HDIO_SET_PIO_MODE, &ide_devset_pio_mode }, |
| { 0 } |
| }; |
| |
| int ide_setting_ioctl(ide_drive_t *drive, struct block_device *bdev, |
| unsigned int cmd, unsigned long arg, |
| const struct ide_ioctl_devset *s) |
| { |
| const struct ide_devset *ds; |
| int err = -EOPNOTSUPP; |
| |
| for (; (ds = s->setting); s++) { |
| if (ds->get && s->get_ioctl == cmd) |
| goto read_val; |
| else if (ds->set && s->set_ioctl == cmd) |
| goto set_val; |
| } |
| |
| return err; |
| |
| read_val: |
| mutex_lock(&ide_setting_mtx); |
| err = ds->get(drive); |
| 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 = ide_devset_execute(drive, ds, arg); |
| mutex_unlock(&ide_setting_mtx); |
| } |
| } |
| return err; |
| } |
| EXPORT_SYMBOL_GPL(ide_setting_ioctl); |
| |
| static int ide_get_identity_ioctl(ide_drive_t *drive, unsigned int cmd, |
| unsigned long arg) |
| { |
| u16 *id = NULL; |
| int size = (cmd == HDIO_GET_IDENTITY) ? (ATA_ID_WORDS * 2) : 142; |
| int rc = 0; |
| |
| if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0) { |
| rc = -ENOMSG; |
| goto out; |
| } |
| |
| /* ata_id_to_hd_driveid() relies on 'id' to be fully allocated. */ |
| id = kmalloc(ATA_ID_WORDS * 2, GFP_KERNEL); |
| if (id == NULL) { |
| rc = -ENOMEM; |
| goto out; |
| } |
| |
| memcpy(id, drive->id, size); |
| ata_id_to_hd_driveid(id); |
| |
| if (copy_to_user((void __user *)arg, id, size)) |
| rc = -EFAULT; |
| |
| kfree(id); |
| out: |
| return rc; |
| } |
| |
| static int ide_get_nice_ioctl(ide_drive_t *drive, unsigned long arg) |
| { |
| return put_user((!!(drive->dev_flags & IDE_DFLAG_DSC_OVERLAP) |
| << IDE_NICE_DSC_OVERLAP) | |
| (!!(drive->dev_flags & IDE_DFLAG_NICE1) |
| << IDE_NICE_1), (long __user *)arg); |
| } |
| |
| static int ide_set_nice_ioctl(ide_drive_t *drive, unsigned long arg) |
| { |
| if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1)))) |
| return -EPERM; |
| |
| if (((arg >> IDE_NICE_DSC_OVERLAP) & 1) && |
| (drive->media != ide_tape)) |
| return -EPERM; |
| |
| if ((arg >> IDE_NICE_DSC_OVERLAP) & 1) |
| drive->dev_flags |= IDE_DFLAG_DSC_OVERLAP; |
| else |
| drive->dev_flags &= ~IDE_DFLAG_DSC_OVERLAP; |
| |
| if ((arg >> IDE_NICE_1) & 1) |
| drive->dev_flags |= IDE_DFLAG_NICE1; |
| else |
| drive->dev_flags &= ~IDE_DFLAG_NICE1; |
| |
| return 0; |
| } |
| |
| static int ide_cmd_ioctl(ide_drive_t *drive, unsigned long arg) |
| { |
| u8 *buf = NULL; |
| int bufsize = 0, err = 0; |
| u8 args[4], xfer_rate = 0; |
| struct ide_cmd cmd; |
| struct ide_taskfile *tf = &cmd.tf; |
| |
| if (NULL == (void *) arg) { |
| struct request *rq; |
| |
| rq = blk_get_request(drive->queue, READ, __GFP_WAIT); |
| rq->cmd_type = REQ_TYPE_ATA_TASKFILE; |
| err = blk_execute_rq(drive->queue, NULL, rq, 0); |
| blk_put_request(rq); |
| |
| return err; |
| } |
| |
| if (copy_from_user(args, (void __user *)arg, 4)) |
| return -EFAULT; |
| |
| memset(&cmd, 0, sizeof(cmd)); |
| tf->feature = args[2]; |
| if (args[0] == ATA_CMD_SMART) { |
| tf->nsect = args[3]; |
| tf->lbal = args[1]; |
| tf->lbam = ATA_SMART_LBAM_PASS; |
| tf->lbah = ATA_SMART_LBAH_PASS; |
| cmd.valid.out.tf = IDE_VALID_OUT_TF; |
| cmd.valid.in.tf = IDE_VALID_NSECT; |
| } else { |
| tf->nsect = args[1]; |
| cmd.valid.out.tf = IDE_VALID_FEATURE | IDE_VALID_NSECT; |
| cmd.valid.in.tf = IDE_VALID_NSECT; |
| } |
| tf->command = args[0]; |
| cmd.protocol = args[3] ? ATA_PROT_PIO : ATA_PROT_NODATA; |
| |
| if (args[3]) { |
| cmd.tf_flags |= IDE_TFLAG_IO_16BIT; |
| bufsize = SECTOR_SIZE * args[3]; |
| buf = kzalloc(bufsize, GFP_KERNEL); |
| if (buf == NULL) |
| return -ENOMEM; |
| } |
| |
| if (tf->command == ATA_CMD_SET_FEATURES && |
| tf->feature == SETFEATURES_XFER && |
| tf->nsect >= XFER_SW_DMA_0) { |
| xfer_rate = ide_find_dma_mode(drive, tf->nsect); |
| if (xfer_rate != tf->nsect) { |
| err = -EINVAL; |
| goto abort; |
| } |
| |
| cmd.tf_flags |= IDE_TFLAG_SET_XFER; |
| } |
| |
| err = ide_raw_taskfile(drive, &cmd, buf, args[3]); |
| |
| args[0] = tf->status; |
| args[1] = tf->error; |
| args[2] = tf->nsect; |
| abort: |
| if (copy_to_user((void __user *)arg, &args, 4)) |
| err = -EFAULT; |
| if (buf) { |
| if (copy_to_user((void __user *)(arg + 4), buf, bufsize)) |
| err = -EFAULT; |
| kfree(buf); |
| } |
| return err; |
| } |
| |
| static int ide_task_ioctl(ide_drive_t *drive, unsigned long arg) |
| { |
| void __user *p = (void __user *)arg; |
| int err = 0; |
| u8 args[7]; |
| struct ide_cmd cmd; |
| |
| if (copy_from_user(args, p, 7)) |
| return -EFAULT; |
| |
| memset(&cmd, 0, sizeof(cmd)); |
| memcpy(&cmd.tf.feature, &args[1], 6); |
| cmd.tf.command = args[0]; |
| cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE; |
| cmd.valid.in.tf = IDE_VALID_IN_TF | IDE_VALID_DEVICE; |
| |
| err = ide_no_data_taskfile(drive, &cmd); |
| |
| args[0] = cmd.tf.command; |
| memcpy(&args[1], &cmd.tf.feature, 6); |
| |
| if (copy_to_user(p, args, 7)) |
| err = -EFAULT; |
| |
| return err; |
| } |
| |
| static int generic_drive_reset(ide_drive_t *drive) |
| { |
| struct request *rq; |
| int ret = 0; |
| |
| rq = blk_get_request(drive->queue, READ, __GFP_WAIT); |
| rq->cmd_type = REQ_TYPE_DRV_PRIV; |
| rq->cmd_len = 1; |
| rq->cmd[0] = REQ_DRIVE_RESET; |
| if (blk_execute_rq(drive->queue, NULL, rq, 1)) |
| ret = rq->errors; |
| blk_put_request(rq); |
| return ret; |
| } |
| |
| int generic_ide_ioctl(ide_drive_t *drive, struct block_device *bdev, |
| unsigned int cmd, unsigned long arg) |
| { |
| int err; |
| |
| err = ide_setting_ioctl(drive, bdev, cmd, arg, ide_ioctl_settings); |
| if (err != -EOPNOTSUPP) |
| return err; |
| |
| switch (cmd) { |
| case HDIO_OBSOLETE_IDENTITY: |
| case HDIO_GET_IDENTITY: |
| if (bdev != bdev->bd_contains) |
| return -EINVAL; |
| return ide_get_identity_ioctl(drive, cmd, arg); |
| case HDIO_GET_NICE: |
| return ide_get_nice_ioctl(drive, arg); |
| case HDIO_SET_NICE: |
| if (!capable(CAP_SYS_ADMIN)) |
| return -EACCES; |
| return ide_set_nice_ioctl(drive, arg); |
| #ifdef CONFIG_IDE_TASK_IOCTL |
| case HDIO_DRIVE_TASKFILE: |
| if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) |
| return -EACCES; |
| if (drive->media == ide_disk) |
| return ide_taskfile_ioctl(drive, arg); |
| return -ENOMSG; |
| #endif |
| case HDIO_DRIVE_CMD: |
| if (!capable(CAP_SYS_RAWIO)) |
| return -EACCES; |
| return ide_cmd_ioctl(drive, arg); |
| case HDIO_DRIVE_TASK: |
| if (!capable(CAP_SYS_RAWIO)) |
| return -EACCES; |
| return ide_task_ioctl(drive, arg); |
| case HDIO_DRIVE_RESET: |
| if (!capable(CAP_SYS_ADMIN)) |
| return -EACCES; |
| return generic_drive_reset(drive); |
| case HDIO_GET_BUSSTATE: |
| if (!capable(CAP_SYS_ADMIN)) |
| return -EACCES; |
| if (put_user(BUSSTATE_ON, (long __user *)arg)) |
| return -EFAULT; |
| return 0; |
| case HDIO_SET_BUSSTATE: |
| if (!capable(CAP_SYS_ADMIN)) |
| return -EACCES; |
| return -EOPNOTSUPP; |
| default: |
| return -EINVAL; |
| } |
| } |
| EXPORT_SYMBOL(generic_ide_ioctl); |