libnvdimm, pmem: Add sysfs notifications to badblocks
Sysfs "badblocks" information may be updated during run-time that:
- MCE, SCI, and sysfs "scrub" may add new bad blocks
- Writes and ioctl() may clear bad blocks
Add support to send sysfs notifications to sysfs "badblocks" file
under region and pmem directories when their badblocks information
is re-evaluated (but is not necessarily changed) during run-time.
Signed-off-by: Toshi Kani <toshi.kani@hpe.com>
Cc: Vishal Verma <vishal.l.verma@intel.com>
Cc: Linda Knippers <linda.knippers@hpe.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
diff --git a/drivers/nvdimm/region.c b/drivers/nvdimm/region.c
index 869a886..ca94029 100644
--- a/drivers/nvdimm/region.c
+++ b/drivers/nvdimm/region.c
@@ -58,10 +58,16 @@
if (devm_init_badblocks(dev, &nd_region->bb))
return -ENODEV;
+ nd_region->bb_state = sysfs_get_dirent(nd_region->dev.kobj.sd,
+ "badblocks");
+ if (nd_region->bb_state)
+ sysfs_put(nd_region->bb_state);
+ else
+ dev_warn(&nd_region->dev,
+ "sysfs_get_dirent 'badblocks' failed\n");
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);
+ nvdimm_badblocks_populate(nd_region, &nd_region->bb, &ndr_res);
}
nd_region->btt_seed = nd_btt_create(nd_region);
@@ -126,6 +132,8 @@
nd_region->ndr_size - 1;
nvdimm_badblocks_populate(nd_region,
&nd_region->bb, &res);
+ if (nd_region->bb_state)
+ sysfs_notify_dirent(nd_region->bb_state);
}
}
device_for_each_child(dev, &event, child_notify);