Add lunid attribute to each logical drive at
/sys/devices/<dev>/ccissX/cXdY/lunid for controller X,
logical drive Y
Signed-off-by: Stephen M. Cameron <scameron@xxxxxxxxxxxxxxxxxx>
---
.../ABI/testing/sysfs-bus-pci-devices-cciss | 7 +++++
drivers/block/cciss.c | 26 ++++++++++++++++++++
2 files changed, 33 insertions(+), 0 deletions(-)
diff --git a/Documentation/ABI/testing/sysfs-bus-pci-devices-cciss b/Documentation/ABI/testing/sysfs-bus-pci-devices-cciss
index ac3429d..5a6c8d3 100644
--- a/Documentation/ABI/testing/sysfs-bus-pci-devices-cciss
+++ b/Documentation/ABI/testing/sysfs-bus-pci-devices-cciss
@@ -38,3 +38,10 @@ Kernel Version: 2.6.31
Contact: iss_storagedev@xxxxxx
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@xxxxxx
+Description: Displays the 8-byte LUN ID used to address logical
+ drive Y of controller X.
diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c
index 0ff665e..a8684d0 100644
--- a/drivers/block/cciss.c
+++ b/drivers/block/cciss.c
@@ -578,6 +578,31 @@ 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
@@ -603,6 +628,7 @@ static struct attribute *cciss_dev_attrs[] = {
&dev_attr_model.attr,
&dev_attr_vendor.attr,
&dev_attr_rev.attr,
+ &dev_attr_lunid.attr,
NULL
};
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