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Commit 5924b74c authored by Tejun Heo's avatar Tejun Heo Committed by Jeff Garzik
Browse files

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

drivers/ata/libata-scsi.c

+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;