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| author |   Vishal Verma <vishal.l.verma@intel.com> | 2016-07-27 16:38:59 -0600 |
|---|---|---|
| committer |   Dan Williams <dan.j.williams@intel.com> | 2016-08-08 09:26:14 -0700 |
| commit | abe8b4e3cef88b8202641d63f5ad58141b970b0f (patch) | |
| tree | b52e23c0f87ac191907395db7d5fae85fd1383f7 /drivers/nvdimm/btt_devs.c | |
| parent | libnvdimm, nd_blk: mask off reserved status bits (diff) | |
| download | linux-dev-abe8b4e3cef88b8202641d63f5ad58141b970b0f.tar.xz linux-dev-abe8b4e3cef88b8202641d63f5ad58141b970b0f.zip | |
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>
Diffstat (limited to 'drivers/nvdimm/btt_devs.c')
| -rw-r--r-- | drivers/nvdimm/btt_devs.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/drivers/nvdimm/btt_devs.c b/drivers/nvdimm/btt_devs.c index 3fa7919f94a8..97dd2925ed6e 100644 --- a/drivers/nvdimm/btt_devs.c +++ b/drivers/nvdimm/btt_devs.c @@ -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, }; |