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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: Linda Knippers <linda.knippers@hpe.com>
Signed-off-by: Vishal Verma <vishal.l.verma@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Vishal Verma 2016-07-27 16:38:59 -06:00 committed by Dan Williams
parent 68202c9f0a
commit abe8b4e3ce
3 changed files with 22 additions and 0 deletions
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1
drivers/nvdimm/btt.c
View File

@ -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
drivers/nvdimm/btt_devs.c
View File

@ -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
drivers/nvdimm/nd.h
View File

@ -143,6 +143,7 @@ struct nd_btt {
struct nd_namespace_common *ndns;
struct btt *btt;
unsigned long lbasize;
u64 size;
u8 *uuid;
int id;
};