Commit 248d4fe9 authored by Hannes Reinecke's avatar Hannes Reinecke Committed by Martin K. Petersen

scsi: export 'wwid' to sysfs

Use scsi_vpd_lun_id() to export the world-wide unique id (wwid) to
sysfs.  Note that this is the 'best' wwid according to the rules in
scsi_vpd_lun_id(), not every possible wwid presented by the drive.
Signed-off-by: default avatarHannes Reinecke <hare@suse.de>
Reviewed-by: default avatarJohannes Thumshirn <jthumshirn@suse.com>
Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
parent 9983bed3
......@@ -905,6 +905,22 @@ sdev_show_function(queue_depth, "%d\n");
static DEVICE_ATTR(queue_depth, S_IRUGO | S_IWUSR, sdev_show_queue_depth,
sdev_store_queue_depth);
static ssize_t
sdev_show_wwid(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct scsi_device *sdev = to_scsi_device(dev);
ssize_t count;
count = scsi_vpd_lun_id(sdev, buf, PAGE_SIZE);
if (count > 0) {
buf[count] = '\n';
count++;
}
return count;
}
static DEVICE_ATTR(wwid, S_IRUGO, sdev_show_wwid, NULL);
#ifdef CONFIG_SCSI_DH
static ssize_t
sdev_show_dh_state(struct device *dev, struct device_attribute *attr,
......@@ -1028,6 +1044,7 @@ static struct attribute *scsi_sdev_attrs[] = {
&dev_attr_modalias.attr,
&dev_attr_queue_depth.attr,
&dev_attr_queue_type.attr,
&dev_attr_wwid.attr,
#ifdef CONFIG_SCSI_DH
&dev_attr_dh_state.attr,
#endif
......
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