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libnvdimm: add mechanism to publish badblocks at the region level

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badblocks sysfs file will be export at region level. When nvdimm event
notifier happens for NVDIMM_REVALIATE_POISON, the badblocks in the
region will be updated.

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>
This commit is contained in:
Dave Jiang
2017-04-07 15:33:20 -07:00
committed by Dan Williams
parent 3c87f37269
commit 6a6bef9042
3 changed files with 44 additions and 0 deletions
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19
drivers/nvdimm/region_devs.c
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@@ -448,6 +448,21 @@ static ssize_t read_only_store(struct device *dev,
}
static DEVICE_ATTR_RW(read_only);
static ssize_t nd_badblocks_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct nd_region *nd_region = to_nd_region(dev);
return badblocks_show(&nd_region->bb, buf, 0);
}
static struct device_attribute dev_attr_nd_badblocks = {
.attr = {
.name = "badblocks",
.mode = S_IRUGO
},
.show = nd_badblocks_show,
};
static struct attribute *nd_region_attributes[] = {
&dev_attr_size.attr,
&dev_attr_nstype.attr,
@@ -460,6 +475,7 @@ static struct attribute *nd_region_attributes[] = {
&dev_attr_available_size.attr,
&dev_attr_namespace_seed.attr,
&dev_attr_init_namespaces.attr,
&dev_attr_nd_badblocks.attr,
NULL,
};
@@ -476,6 +492,9 @@ static umode_t region_visible(struct kobject *kobj, struct attribute *a, int n)
if (!is_nd_pmem(dev) && a == &dev_attr_dax_seed.attr)
return 0;
if (!is_nd_pmem(dev) && a == &dev_attr_nd_badblocks.attr)
return 0;
if (a != &dev_attr_set_cookie.attr
&& a != &dev_attr_available_size.attr)
return a->mode;