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Commit 3ff1111d authored by Stephen M. Cameron's avatar Stephen M. Cameron Committed by Jens Axboe
Browse files

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: default avatarStephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: default avatarJens Axboe <jens.axboe@oracle.com>
parent fa52bec9

Documentation/ABI/testing/sysfs-bus-pci-devices-cciss

+7 −0
Original line number Diff line number Diff line
@@ -45,3 +45,10 @@ Kernel Version: 2.6.31 
Contact:	iss_storagedev@hp.com

Description:	Displays the 8-byte LUN ID used to address logical

		drive Y of controller X.



Where:		/sys/bus/pci/devices/<dev>/ccissX/cXdY/raid_level

Date:		August 2009

Kernel Version: 2.6.31

Contact:	iss_storagedev@hp.com

Description:	Displays the RAID level of logical drive Y of

		controller X.

drivers/block/cciss.c

+24 −0
Original line number Diff line number Diff line
@@ -603,6 +603,29 @@ static ssize_t cciss_show_lunid(struct device *dev, 
}

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 @@ static struct attribute *cciss_dev_attrs[] = { 
	&dev_attr_vendor.attr,

	&dev_attr_rev.attr,

	&dev_attr_lunid.attr,

	&dev_attr_raid_level.attr,

	NULL

};