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Commit d6f4965d authored by Andrew Patterson's avatar Andrew Patterson Committed by Jens Axboe
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cciss: Allow triggering of rescan of logical drive topology via sysfs entry 



Added /sys/bus/pci/devices/<dev>/ccissX/rescan sysfs entry used
to kick off a rescan that discovers logical drive topology changes.

Signed-off-by: default avatarAndrew Patterson <andrew.patterson@hp.com>
Signed-off-by: default avatarStephen M. Cameron <scameron@beardog.cce.hp.com>
Acked-by: default avatarMike Miller <mike.miller@hp.com>
Signed-off-by: default avatarJens Axboe <jens.axboe@oracle.com>
parent b368c9dd

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

+7 −0
Original line number Diff line number Diff line
@@ -31,3 +31,10 @@ Date: March 2009 
Kernel Version: 2.6.30

Contact:	iss_storagedev@hp.com

Description:	A symbolic link to /sys/block/cciss!cXdY



Where:		/sys/bus/pci/devices/<dev>/ccissX/rescan

Date:		August 2009

Kernel Version:	2.6.31

Contact:	iss_storagedev@hp.com

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

		drive topology changes.

drivers/block/cciss.c

+33 −3
Original line number Diff line number Diff line
@@ -195,6 +195,7 @@ static int sendcmd_withirq_core(ctlr_info_t *h, CommandList_struct *c, 
static int process_sendcmd_error(ctlr_info_t *h, CommandList_struct *c);



static void fail_all_cmds(unsigned long ctlr);

static int add_to_scan_list(struct ctlr_info *h);

static int scan_thread(void *data);

static int check_for_unit_attention(ctlr_info_t *h, CommandList_struct *c);
@@ -460,9 +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,
@@ -566,6 +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,