diff mbox series

[4/5] libnvdimm: add overwrite status notification

Message ID 153800992607.57703.10683680202572112427.stgit@djiang5-desk3.ch.intel.com (mailing list archive)
State Superseded
Headers show
Series Adding nvdimm overwrite support | expand

Commit Message

Dave Jiang Sept. 27, 2018, 12:58 a.m. UTC 
Adding sysfs notification for when overwrite has completed to allow
user monitoring app to be aware of overwrite completion status.

Signed-off-by: Dave Jiang <dave.jiang@intel.com>
---
 drivers/acpi/nfit/core.c   |    5 +++++
 drivers/nvdimm/dimm_devs.c |   12 ++++++++++++
 drivers/nvdimm/nd-core.h   |    1 +
 include/linux/libnvdimm.h  |    1 +
 4 files changed, 19 insertions(+)
diff mbox series

Patch

diff --git a/drivers/acpi/nfit/core.c b/drivers/acpi/nfit/core.c
index e5f7c664a7c8..87a48790a949 100644
--- a/drivers/acpi/nfit/core.c
+++ b/drivers/acpi/nfit/core.c
@@ -1940,6 +1940,11 @@  static int acpi_nfit_register_dimms(struct acpi_nfit_desc *acpi_desc)
 		if (!nvdimm)
 			continue;
 
+		rc = nvdimm_setup_security_events(nvdimm);
+		if (rc < 0)
+			dev_warn(acpi_desc->dev,
+					"no security event setup failed\n");
+
 		nfit_kernfs = sysfs_get_dirent(nvdimm_kobj(nvdimm)->sd, "nfit");
 		if (nfit_kernfs)
 			nfit_mem->flags_attr = sysfs_get_dirent(nfit_kernfs,
diff --git a/drivers/nvdimm/dimm_devs.c b/drivers/nvdimm/dimm_devs.c
index c636ce1d8f5f..7ef70aeabab2 100644
--- a/drivers/nvdimm/dimm_devs.c
+++ b/drivers/nvdimm/dimm_devs.c
@@ -213,6 +213,8 @@  static void nvdimm_overwrite_query(struct work_struct *work)
 	else
 		dev_info(&nvdimm->dev, "Overwrite completed\n");
 
+	if (nvdimm->overwrite_state)
+		sysfs_notify_dirent(nvdimm->overwrite_state);
 	nvdimm->overwrite_tmo = 0;
 	nvdimm_clear_security_busy(&nvdimm->dev);
 	nvdimm_security_get_state(&nvdimm->dev);
@@ -1133,6 +1135,16 @@  struct nvdimm *nvdimm_create(struct nvdimm_bus *nvdimm_bus, void *provider_data,
 }
 EXPORT_SYMBOL_GPL(nvdimm_create);
 
+int nvdimm_setup_security_events(struct nvdimm *nvdimm)
+{
+	nvdimm->overwrite_state = sysfs_get_dirent(nvdimm->dev.kobj.sd,
+			"security");
+	if (!nvdimm->overwrite_state)
+		return -ENODEV;
+	return 0;
+}
+EXPORT_SYMBOL_GPL(nvdimm_setup_security_events);
+
 int alias_dpa_busy(struct device *dev, void *data)
 {
 	resource_size_t map_end, blk_start, new;
diff --git a/drivers/nvdimm/nd-core.h b/drivers/nvdimm/nd-core.h
index f44ad99763ba..9c6228bb29b6 100644
--- a/drivers/nvdimm/nd-core.h
+++ b/drivers/nvdimm/nd-core.h
@@ -49,6 +49,7 @@  struct nvdimm {
 	struct key *key;
 	struct delayed_work dwork;
 	unsigned int overwrite_tmo;
+	struct kernfs_node *overwrite_state;
 };
 
 /**
diff --git a/include/linux/libnvdimm.h b/include/linux/libnvdimm.h
index c334fd70afb4..a80469466dc6 100644
--- a/include/linux/libnvdimm.h
+++ b/include/linux/libnvdimm.h
@@ -225,6 +225,7 @@  struct nvdimm *nvdimm_create(struct nvdimm_bus *nvdimm_bus, void *provider_data,
 		unsigned long cmd_mask, int num_flush,
 		struct resource *flush_wpq, const char *dimm_id,
 		const struct nvdimm_security_ops *sec_ops);
+int nvdimm_setup_security_events(struct nvdimm *nvdimm);
 const struct nd_cmd_desc *nd_cmd_dimm_desc(int cmd);
 const struct nd_cmd_desc *nd_cmd_bus_desc(int cmd);
 u32 nd_cmd_in_size(struct nvdimm *nvdimm, int cmd,