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Commit ce84a8ae authored by Stephen M. Cameron's avatar Stephen M. Cameron Committed by Jens Axboe
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cciss: Add lunid attribute to each logical drive in /sys 



Add lunid attribute to each logical drive at
/sys/devices/<dev>/ccissX/cXdY/lunid 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 2e043986

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

+7 −0
Original line number Diff line number Diff line
@@ -38,3 +38,10 @@ Kernel Version: 2.6.31 
Contact:	iss_storagedev@hp.com

Description:	Kicks of a rescan of the controller to discover logical

		drive topology changes.



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

Date:		August 2009

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.

drivers/block/cciss.c

+26 −0
Original line number Diff line number Diff line
@@ -579,6 +579,31 @@ static ssize_t dev_show_rev(struct device *dev, 
}

DEVICE_ATTR(rev, S_IRUGO, dev_show_rev, NULL);



static ssize_t cciss_show_lunid(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);

	unsigned long flags;

	unsigned char lunid[8];



	spin_lock_irqsave(CCISS_LOCK(h->ctlr), flags);

	if (h->busy_configuring) {

		spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);

		return -EBUSY;

	}

	if (!drv->heads) {

		spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);

		return -ENOTTY;

	}

	memcpy(lunid, drv->LunID, sizeof(lunid));

	spin_unlock_irqrestore(CCISS_LOCK(h->ctlr), flags);

	return snprintf(buf, 20, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n",

		lunid[0], lunid[1], lunid[2], lunid[3],

		lunid[4], lunid[5], lunid[6], lunid[7]);

}

DEVICE_ATTR(lunid, S_IRUGO, cciss_show_lunid, NULL);



static struct attribute *cciss_host_attrs[] = {

	&dev_attr_rescan.attr,

	NULL
@@ -604,6 +629,7 @@ static struct attribute *cciss_dev_attrs[] = { 
	&dev_attr_model.attr,

	&dev_attr_vendor.attr,

	&dev_attr_rev.attr,

	&dev_attr_lunid.attr,

	NULL

};