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authorDave Jiang <dave.jiang@intel.com>2017-04-07 15:33:25 -0700
committerDan Williams <dan.j.williams@intel.com>2017-04-12 21:56:42 -0700
commit802f4be6feee3f0395c26ac9717da5b15f6b8fec (patch)
tree94aa31dd73e3f504d75dd6caf1d7cdb243e11890 /drivers/nvdimm
parent6a6bef90425e8cba7c53919d923240559b7f247c (diff)
downloadlinux-802f4be6feee3f0395c26ac9717da5b15f6b8fec.tar.bz2
libnvdimm: Add 'resource' sysfs attribute to regions
Adding sysfs attribute in order to export the physical address of the region. This is for supporting of user app poison clear via ND_IOCTL_CLEAR_ERROR. Signed-off-by: Dave Jiang <dave.jiang@intel.com> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/nvdimm')
-rw-r--r--drivers/nvdimm/region_devs.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/nvdimm/region_devs.c b/drivers/nvdimm/region_devs.c
index 3500fc84d939..8de5a04644a1 100644
--- a/drivers/nvdimm/region_devs.c
+++ b/drivers/nvdimm/region_devs.c
@@ -463,6 +463,15 @@ static struct device_attribute dev_attr_nd_badblocks = {
.show = nd_badblocks_show,
};
+static ssize_t resource_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct nd_region *nd_region = to_nd_region(dev);
+
+ return sprintf(buf, "%#llx\n", nd_region->ndr_start);
+}
+static DEVICE_ATTR_RO(resource);
+
static struct attribute *nd_region_attributes[] = {
&dev_attr_size.attr,
&dev_attr_nstype.attr,
@@ -476,6 +485,7 @@ static struct attribute *nd_region_attributes[] = {
&dev_attr_namespace_seed.attr,
&dev_attr_init_namespaces.attr,
&dev_attr_nd_badblocks.attr,
+ &dev_attr_resource.attr,
NULL,
};
@@ -495,6 +505,9 @@ static umode_t region_visible(struct kobject *kobj, struct attribute *a, int n)
if (!is_nd_pmem(dev) && a == &dev_attr_nd_badblocks.attr)
return 0;
+ if (!is_nd_pmem(dev) && a == &dev_attr_resource.attr)
+ return 0;
+
if (a != &dev_attr_set_cookie.attr
&& a != &dev_attr_available_size.attr)
return a->mode;