add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/nvdimm/dimm.c
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@@ -1,14 +1,6 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /*
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  * Copyright(c) 2013-2015 Intel Corporation. All rights reserved.
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- *
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- * This program is free software; you can redistribute it and/or modify
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- * it under the terms of version 2 of the GNU General Public License as
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- * published by the Free Software Foundation.
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- *
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- * This program is distributed in the hope that it will be useful, but
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- * WITHOUT ANY WARRANTY; without even the implied warranty of
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- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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- * General Public License for more details.
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  */
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 #include <linux/vmalloc.h>
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 #include <linux/module.h>
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@@ -26,6 +18,12 @@
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 	struct nvdimm_drvdata *ndd;
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 	int rc;
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+	rc = nvdimm_security_setup_events(dev);
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+	if (rc < 0) {
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+		dev_err(dev, "security event setup failed: %d\n", rc);
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+		return rc;
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+	}
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+
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 	rc = nvdimm_check_config_data(dev);
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 	if (rc) {
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 		/* not required for non-aliased nvdimm, ex. NVDIMM-N */
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@@ -34,7 +32,11 @@
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 		return rc;
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 	}
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-	/* reset locked, to be validated below... */
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+	/*
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+	 * The locked status bit reflects explicit status codes from the
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+	 * label reading commands, revalidate it each time the driver is
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+	 * activated and re-reads the label area.
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+	 */
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 	nvdimm_clear_locked(dev);
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 	ndd = kzalloc(sizeof(*ndd), GFP_KERNEL);
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@@ -50,6 +52,16 @@
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 	ndd->dev = dev;
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 	get_device(dev);
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 	kref_init(&ndd->kref);
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+
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+	/*
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+	 * Attempt to unlock, if the DIMM supports security commands,
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+	 * otherwise the locked indication is determined by explicit
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+	 * status codes from the label reading commands.
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+	 */
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+	rc = nvdimm_security_unlock(dev);
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+	if (rc < 0)
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+		dev_dbg(dev, "failed to unlock dimm: %d\n", rc);
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+
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 	/*
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 	 * EACCES failures reading the namespace label-area-properties
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@@ -75,7 +87,7 @@
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 	 * DIMM capacity. We fail the dimm probe to prevent regions from
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 	 * attempting to parse the label area.
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 	 */
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-	rc = nvdimm_init_config_data(ndd);
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+	rc = nd_label_data_init(ndd);
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 	if (rc == -EACCES)
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 		nvdimm_set_locked(dev);
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 	if (rc)
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@@ -84,14 +96,10 @@
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 	dev_dbg(dev, "config data size: %d\n", ndd->nsarea.config_size);
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 	nvdimm_bus_lock(dev);
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-	ndd->ns_current = nd_label_validate(ndd);
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-	ndd->ns_next = nd_label_next_nsindex(ndd->ns_current);
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-	nd_label_copy(ndd, to_next_namespace_index(ndd),
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-			to_current_namespace_index(ndd));
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 	if (ndd->ns_current >= 0) {
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 		rc = nd_label_reserve_dpa(ndd);
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 		if (rc == 0)
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-			nvdimm_set_aliasing(dev);
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+			nvdimm_set_labeling(dev);
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 	}
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 	nvdimm_bus_unlock(dev);
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