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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>
This commit is contained in:
Joseph T Handzik 2016-04-27 17:13:33 -05:00 committed by Martin K. Petersen
parent cf47723763
commit ded1be4ae6
1 changed files with 25 additions and 0 deletions
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25
drivers/scsi/hpsa.c
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@ -728,6 +728,29 @@ static ssize_t unique_id_show(struct device *dev,
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(raid_level, S_IRUGO, raid_level_show, NULL);
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 @@ static struct device_attribute *hpsa_sdev_attrs[] = {
&dev_attr_unique_id,
&dev_attr_hp_ssd_smart_path_enabled,
&dev_attr_path_info,
&dev_attr_sas_address,
NULL,
};