cciss: kick off logical drive topology rescan through sysfs
Added /sys/bus/pci/devices/<dev>/ccissX/rescan sysfs entry used
to kick off a rescan that discovers logical drive topology changes.
Acked-by: Mike Miller <mike.miller@xxxxxx>
Signed-off-by: Andrew Patterson <andrew.patterson@xxxxxx>
---
diff --git a/Documentation/ABI/testing/sysfs-bus-pci-devices-cciss b/Documentation/ABI/testing/sysfs-bus-pci-devices-cciss
index 0a92a7c..4050606 100644
--- a/Documentation/ABI/testing/sysfs-bus-pci-devices-cciss
+++ b/Documentation/ABI/testing/sysfs-bus-pci-devices-cciss
@@ -31,3 +31,10 @@ Date: March 2009
Kernel Version: 2.6.30
Contact: iss_storagedev@xxxxxx
Description: A symbolic link to /sys/block/cciss!cXdY
+
+Where: /sys/bus/pci/devices/<dev>/ccissX/rescan
+Date: July 2009
+Kernel Version: 2.6.31
+Contact: iss_storagedev@xxxxxx
+Description: Kicks of a rescan of the controller to discovery logical
+ drive topology changes.
diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c
index c6bba77..a409e26 100644
--- a/drivers/block/cciss.c
+++ b/drivers/block/cciss.c
@@ -461,9 +461,19 @@ static void __devinit cciss_procinit(int i)
#define to_hba(n) container_of(n, struct ctlr_info, dev)
#define to_drv(n) container_of(n, drive_info_struct, dev)
-static struct device_type cciss_host_type = {
- .name = "cciss_host",
-};
+static ssize_t host_store_rescan(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct ctlr_info *h = to_hba(dev);
+
+ add_to_scan_list(h);
+ wake_up_process(cciss_scan_thread);
+ wait_for_completion_interruptible(&h->scan_wait);
+
+ return count;
+}
+DEVICE_ATTR(rescan, S_IWUSR, NULL, host_store_rescan);
static ssize_t dev_show_unique_id(struct device *dev,
struct device_attribute *attr,
@@ -567,6 +577,25 @@ static ssize_t dev_show_rev(struct device *dev,
}
DEVICE_ATTR(rev, S_IRUGO, dev_show_rev, NULL);
+static struct attribute *cciss_host_attrs[] = {
+ &dev_attr_rescan.attr,
+ NULL
+};
+
+static struct attribute_group cciss_host_attr_group = {
+ .attrs = cciss_host_attrs,
+};
+
+static struct attribute_group *cciss_host_attr_groups[] = {
+ &cciss_host_attr_group,
+ NULL
+};
+
+static struct device_type cciss_host_type = {
+ .name = "cciss_host",
+ .groups = cciss_host_attr_groups,
+};
+
static struct attribute *cciss_dev_attrs[] = {
&dev_attr_unique_id.attr,
&dev_attr_model.attr,
--
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