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Commit 6a6bef90 authored by Dave Jiang's avatar Dave Jiang Committed by Dan Williams
Browse files

libnvdimm: add mechanism to publish badblocks at the region level 



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: default avatarDave Jiang <dave.jiang@intel.com>
Reviewed-by: default avatarJohannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: default avatarDan Williams <dan.j.williams@intel.com>
parent 3c87f372

drivers/nvdimm/nd.h

+1 −0
Original line number Diff line number Diff line
@@ -154,6 +154,7 @@ struct nd_region { 
	u64 ndr_start;

	int id, num_lanes, ro, numa_node;

	void *provider_data;

	struct badblocks bb;

	struct nd_interleave_set *nd_set;

	struct nd_percpu_lane __percpu *lane;

	struct nd_mapping mapping[0];

drivers/nvdimm/region.c

+24 −0
Original line number Diff line number Diff line
@@ -14,6 +14,7 @@ 
#include <linux/module.h>

#include <linux/device.h>

#include <linux/nd.h>

#include "nd-core.h"

#include "nd.h"



static int nd_region_probe(struct device *dev)
@@ -52,6 +53,17 @@ static int nd_region_probe(struct device *dev) 
	if (rc && err && rc == err)

		return -ENODEV;



	if (is_nd_pmem(&nd_region->dev)) {

		struct resource ndr_res;



		if (devm_init_badblocks(dev, &nd_region->bb))

			return -ENODEV;

		ndr_res.start = nd_region->ndr_start;

		ndr_res.end = nd_region->ndr_start + nd_region->ndr_size - 1;

		nvdimm_badblocks_populate(nd_region,

				&nd_region->bb, &ndr_res);

	}



	nd_region->btt_seed = nd_btt_create(nd_region);

	nd_region->pfn_seed = nd_pfn_create(nd_region);

	nd_region->dax_seed = nd_dax_create(nd_region);
@@ -104,6 +116,18 @@ static int child_notify(struct device *dev, void *data) 


static void nd_region_notify(struct device *dev, enum nvdimm_event event)

{

	if (event == NVDIMM_REVALIDATE_POISON) {

		struct nd_region *nd_region = to_nd_region(dev);

		struct resource res;



		if (is_nd_pmem(&nd_region->dev)) {

			res.start = nd_region->ndr_start;

			res.end = nd_region->ndr_start +

				nd_region->ndr_size - 1;

			nvdimm_badblocks_populate(nd_region,

					&nd_region->bb, &res);

		}

	}

	device_for_each_child(dev, &event, child_notify);

}

drivers/nvdimm/region_devs.c

+19 −0
Original line number Diff line number Diff line
@@ -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;