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Commit 5924b74c authored by Tejun Heo's avatar Tejun Heo Committed by Jeff Garzik
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libata: implement HDIO_GET_IDENTITY



'hdparm -I' doesn't work with ATAPI devices and sg_sat is not widely
spread yet leaving no easy way to access ATAPI IDENTIFY data.
Implement HDIO_GET_IDENTITY such that at least 'hdparm -i' works.

Signed-off-by: default avatarTejun Heo <htejun@gmail.com>
Signed-off-by: default avatarJeff Garzik <jeff@garzik.org>
parent 18d90deb
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+42 −1
Original line number Diff line number Diff line
@@ -148,6 +148,45 @@ int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev,
	return 0;
}

/**
 *	ata_get_identity - Handler for HDIO_GET_IDENTITY ioctl
 *	@sdev: SCSI device to get identify data for
 *	@arg: User buffer area for identify data
 *
 *	LOCKING:
 *	Defined by the SCSI layer.  We don't really care.
 *
 *	RETURNS:
 *	Zero on success, negative errno on error.
 */
static int ata_get_identity(struct scsi_device *sdev, void __user *arg)
{
	struct ata_port *ap = ata_shost_to_port(sdev->host);
	struct ata_device *dev = ata_scsi_find_dev(ap, sdev);
	u16 __user *dst = arg;
	char buf[40];

	if (!dev)
		return -ENOMSG;

	if (copy_to_user(dst, dev->id, ATA_ID_WORDS * sizeof(u16)))
		return -EFAULT;

	ata_id_string(dev->id, buf, ATA_ID_PROD, ATA_ID_PROD_LEN);
	if (copy_to_user(dst + ATA_ID_PROD, buf, ATA_ID_PROD_LEN))
		return -EFAULT;

	ata_id_string(dev->id, buf, ATA_ID_FW_REV, ATA_ID_FW_REV_LEN);
	if (copy_to_user(dst + ATA_ID_FW_REV, buf, ATA_ID_FW_REV_LEN))
		return -EFAULT;

	ata_id_string(dev->id, buf, ATA_ID_SERNO, ATA_ID_SERNO_LEN);
	if (copy_to_user(dst + ATA_ID_SERNO, buf, ATA_ID_SERNO_LEN))
		return -EFAULT;

	return 0;
}

/**
 *	ata_cmd_ioctl - Handler for HDIO_DRIVE_CMD ioctl
 *	@scsidev: Device to which we are issuing command
@@ -159,7 +198,6 @@ int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev,
 *	RETURNS:
 *	Zero on success, negative errno on error.
 */

int ata_cmd_ioctl(struct scsi_device *scsidev, void __user *arg)
{
	int rc = 0;
@@ -359,6 +397,9 @@ int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg)
			return -EINVAL;
		return 0;

	case HDIO_GET_IDENTITY:
		return ata_get_identity(scsidev, arg);

	case HDIO_DRIVE_CMD:
		if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
			return -EACCES;