cciss: Add a "raid_level" attribute to each logical drive in /sys
and change get rid of some magic numbers in raid lavel decoding.
Add raid_level attribute to each logical drive at
/sys/devices/<dev>/ccissX/cXdY/raid_level for controller X,
logical drive Y
Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c
index b674f93..063e8b0 100644
--- a/drivers/block/cciss.c
+++ b/drivers/block/cciss.c
@@ -603,6 +603,29 @@
}
DEVICE_ATTR(lunid, S_IRUGO, cciss_show_lunid, NULL);
+static ssize_t cciss_show_raid_level(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ drive_info_struct *drv = dev_get_drvdata(dev);
+ struct ctlr_info *h = to_hba(drv->dev->parent);
+ int raid;
+ unsigned long flags;
+
+ spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);
+ if (h->busy_configuring) {
+ spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
+ return -EBUSY;
+ }
+ raid = drv->raid_level;
+ spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);
+ if (raid < 0 || raid > RAID_UNKNOWN)
+ raid = RAID_UNKNOWN;
+
+ return snprintf(buf, strlen(raid_label[raid]) + 7, "RAID %s\n",
+ raid_label[raid]);
+}
+DEVICE_ATTR(raid_level, S_IRUGO, cciss_show_raid_level, NULL);
+
static struct attribute *cciss_host_attrs[] = {
&dev_attr_rescan.attr,
NULL
@@ -629,6 +652,7 @@
&dev_attr_vendor.attr,
&dev_attr_rev.attr,
&dev_attr_lunid.attr,
+ &dev_attr_raid_level.attr,
NULL
};