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Commit abe8b4e3 authored by Vishal Verma's avatar Vishal Verma Committed by Dan Williams
Browse files

nvdimm, btt: add a size attribute for BTTs 



To be consistent with other namespaces, expose a 'size' attribute for
BTT devices also.

Cc: Dan Williams <dan.j.williams@intel.com>
Reported-by: default avatarLinda Knippers <linda.knippers@hpe.com>
Signed-off-by: default avatarVishal Verma <vishal.l.verma@intel.com>
Signed-off-by: default avatarDan Williams <dan.j.williams@intel.com>
parent 68202c9f

drivers/nvdimm/btt.c

+1 −0
Original line number Diff line number Diff line
@@ -1269,6 +1269,7 @@ static int btt_blk_init(struct btt *btt) 
		}

	}

	set_capacity(btt->btt_disk, btt->nlba * btt->sector_size >> 9);

	btt->nd_btt->size = btt->nlba * (u64)btt->sector_size;

	revalidate_disk(btt->btt_disk);



	return 0;

drivers/nvdimm/btt_devs.c

+20 −0
Original line number Diff line number Diff line
@@ -140,10 +140,30 @@ static ssize_t namespace_store(struct device *dev, 
}

static DEVICE_ATTR_RW(namespace);



static ssize_t size_show(struct device *dev,

		struct device_attribute *attr, char *buf)

{

	struct nd_btt *nd_btt = to_nd_btt(dev);

	ssize_t rc;



	device_lock(dev);

	if (dev->driver)

		rc = sprintf(buf, "%llu\n", nd_btt->size);

	else {

		/* no size to convey if the btt instance is disabled */

		rc = -ENXIO;

	}

	device_unlock(dev);



	return rc;

}

static DEVICE_ATTR_RO(size);



static struct attribute *nd_btt_attributes[] = {

	&dev_attr_sector_size.attr,

	&dev_attr_namespace.attr,

	&dev_attr_uuid.attr,

	&dev_attr_size.attr,

	NULL,

};

drivers/nvdimm/nd.h

+1 −0
Original line number Diff line number Diff line
@@ -143,6 +143,7 @@ struct nd_btt { 
	struct nd_namespace_common *ndns;

	struct btt *btt;

	unsigned long lbasize;

	u64 size;

	u8 *uuid;

	int id;

};