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cciss: Add a "raid_level" attribute to each logical drive in /sys

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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>
This commit is contained in:
Stephen M. Cameron 2009-09-17 13:48:21 -05:00 committed by Jens Axboe
parent fa52bec9df
commit 3ff1111dc6
2 changed files with 31 additions and 0 deletions
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7
Documentation/ABI/testing/sysfs-bus-pci-devices-cciss
View file

@ -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.

24
drivers/block/cciss.c
View file

@ -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
};