From 802f4be6feee3f0395c26ac9717da5b15f6b8fec Mon Sep 17 00:00:00 2001
From: Dave Jiang <dave.jiang@intel.com>
Date: Fri, 7 Apr 2017 15:33:25 -0700
Subject: [PATCH] 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>
---
drivers/nvdimm/region_devs.c | 13 +++++++++++++
1 file changed, 13 insertions(+)
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;
--
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