hpsa: add sas_address to sysfs device attibute
There have been companies requesting a sysfs entry
to obtain the sas address of device.
Reviewed-by: Scott Teel <scott.teel@microsemi.com>
Reviewed-by: Kevin Barnett <kevin.barnett@microsemi.com>
Signed-off-by: Don Brace <don.brace@microsemi.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c
index 9baf04e..a677dfe 100644
--- a/drivers/scsi/hpsa.c
+++ b/drivers/scsi/hpsa.c
@@ -728,6 +728,29 @@
sn[12], sn[13], sn[14], sn[15]);
}
+static ssize_t sas_address_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct ctlr_info *h;
+ struct scsi_device *sdev;
+ struct hpsa_scsi_dev_t *hdev;
+ unsigned long flags;
+ u64 sas_address;
+
+ sdev = to_scsi_device(dev);
+ h = sdev_to_hba(sdev);
+ spin_lock_irqsave(&h->lock, flags);
+ hdev = sdev->hostdata;
+ if (!hdev || is_logical_device(hdev) || !hdev->expose_device) {
+ spin_unlock_irqrestore(&h->lock, flags);
+ return -ENODEV;
+ }
+ sas_address = hdev->sas_address;
+ spin_unlock_irqrestore(&h->lock, flags);
+
+ return snprintf(buf, PAGE_SIZE, "0x%016llx\n", sas_address);
+}
+
static ssize_t host_show_hp_ssd_smart_path_enabled(struct device *dev,
struct device_attribute *attr, char *buf)
{
@@ -840,6 +863,7 @@
static DEVICE_ATTR(lunid, S_IRUGO, lunid_show, NULL);
static DEVICE_ATTR(unique_id, S_IRUGO, unique_id_show, NULL);
static DEVICE_ATTR(rescan, S_IWUSR, NULL, host_store_rescan);
+static DEVICE_ATTR(sas_address, S_IRUGO, sas_address_show, NULL);
static DEVICE_ATTR(hp_ssd_smart_path_enabled, S_IRUGO,
host_show_hp_ssd_smart_path_enabled, NULL);
static DEVICE_ATTR(path_info, S_IRUGO, path_info_show, NULL);
@@ -865,6 +889,7 @@
&dev_attr_unique_id,
&dev_attr_hp_ssd_smart_path_enabled,
&dev_attr_path_info,
+ &dev_attr_sas_address,
NULL,
};