/*
* alua_check_tpgs - Evaluate TPGS setting
* @sdev: device to be checked
*
* Examine the TPGS setting of the sdev to find out if ALUA
* is supported.
*/
static int alua_check_tpgs(struct scsi_device *sdev, struct alua_dh_data *h)
{
int err = SCSI_DH_OK;
h->tpgs = scsi_device_tpgs(sdev);
switch (h->tpgs) {
case TPGS_MODE_EXPLICIT|TPGS_MODE_IMPLICIT:
sdev_printk(KERN_INFO, sdev,
"%s: supports implicit and explicit TPGS\n",
ALUA_DH_NAME);
break;
case TPGS_MODE_EXPLICIT:
sdev_printk(KERN_INFO, sdev, "%s: supports explicit TPGS\n",
ALUA_DH_NAME);
break;
case TPGS_MODE_IMPLICIT:
sdev_printk(KERN_INFO, sdev, "%s: supports implicit TPGS\n",
ALUA_DH_NAME);
break;
default:
h->tpgs = TPGS_MODE_NONE;
sdev_printk(KERN_INFO, sdev, "%s: not supported\n",
ALUA_DH_NAME);
err = SCSI_DH_DEV_UNSUPP;
break;
}
return err;
}
static bool clariion_match(struct scsi_device *sdev)
{
int i;
if (scsi_device_tpgs(sdev))
return false;
for (i = 0; clariion_dev_list[i].vendor; i++) {
if (!strncmp(sdev->vendor, clariion_dev_list[i].vendor,
strlen(clariion_dev_list[i].vendor)) &&
!strncmp(sdev->model, clariion_dev_list[i].model,
strlen(clariion_dev_list[i].model))) {
return true;
}
}
return false;
}
/*
* alua_check_tpgs - Evaluate TPGS setting
* @sdev: device to be checked
*
* Examine the TPGS setting of the sdev to find out if ALUA
* is supported.
*/
static int alua_check_tpgs(struct scsi_device *sdev)
{
int tpgs = TPGS_MODE_NONE;
/*
* ALUA support for non-disk devices is fraught with
* difficulties, so disable it for now.
*/
if (sdev->type != TYPE_DISK) {
sdev_printk(KERN_INFO, sdev,
"%s: disable for non-disk devices\n",
ALUA_DH_NAME);
return tpgs;
}
tpgs = scsi_device_tpgs(sdev);
switch (tpgs) {
case TPGS_MODE_EXPLICIT|TPGS_MODE_IMPLICIT:
sdev_printk(KERN_INFO, sdev,
"%s: supports implicit and explicit TPGS\n",
ALUA_DH_NAME);
break;
case TPGS_MODE_EXPLICIT:
sdev_printk(KERN_INFO, sdev, "%s: supports explicit TPGS\n",
ALUA_DH_NAME);
break;
case TPGS_MODE_IMPLICIT:
sdev_printk(KERN_INFO, sdev, "%s: supports implicit TPGS\n",
ALUA_DH_NAME);
break;
case TPGS_MODE_NONE:
sdev_printk(KERN_INFO, sdev, "%s: not supported\n",
ALUA_DH_NAME);
break;
default:
sdev_printk(KERN_INFO, sdev,
"%s: unsupported TPGS setting %d\n",
ALUA_DH_NAME, tpgs);
tpgs = TPGS_MODE_NONE;
break;
}
return tpgs;
}
static bool alua_match(struct scsi_device *sdev)
{
return (scsi_device_tpgs(sdev) != 0);
}
