nvdimm, btt: add a size attribute for BTTs (abe8b4e3) · Commits · 戴 / test

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;

+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,
		};

+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;
		};