linux-kernel - [RFC PATCH 07/20] nvdimm/namespace_label: Update namespace init_labels and its region

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Message-Id: <720167805.241750165205630.JavaMail.epsvc@epcpadp1new>
Date: Tue, 17 Jun 2025 18:09:31 +0530
From: Neeraj Kumar <s.neeraj@...sung.com>
To: dan.j.williams@...el.com, dave@...olabs.net,
	jonathan.cameron@...wei.com, dave.jiang@...el.com,
	alison.schofield@...el.com, vishal.l.verma@...el.com, ira.weiny@...el.com
Cc: a.manzanares@...sung.com, nifan.cxl@...il.com, anisa.su@...sung.com,
	vishak.g@...sung.com, krish.reddy@...sung.com, arun.george@...sung.com,
	alok.rathore@...sung.com, s.neeraj@...sung.com, neeraj.kernel@...il.com,
	linux-kernel@...r.kernel.org, linux-cxl@...r.kernel.org,
	nvdimm@...ts.linux.dev, gost.dev@...sung.com, cpgs@...sung.com
Subject: [RFC PATCH 07/20] nvdimm/namespace_label: Update namespace
 init_labels and its region_uuid

nd_mapping->labels maintains the list of labels present into LSA.
init_labels function prepares this list while adding new label
into LSA and updates nd_mapping->labels accordingly. During cxl
region creation nd_mapping->labels list and LSA was updated with
one region label. Therefore during new namespace label creation
pre-include the previously created region label, so increase
num_labels count by 1.

Also updated nsl_set_region_uuid with region uuid with which
namespace is associated with.

Signed-off-by: Neeraj Kumar <s.neeraj@...sung.com>
---
 drivers/nvdimm/label.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/nvdimm/label.c b/drivers/nvdimm/label.c
index 9381c50086fc..108100c4bf44 100644
--- a/drivers/nvdimm/label.c
+++ b/drivers/nvdimm/label.c
@@ -947,7 +947,7 @@ static int __pmem_label_update(struct nd_region *nd_region,
 	nsl_set_slot(ndd, ns_label, slot);
 	nsl_set_alignment(ndd, ns_label, 0);
 	nsl_set_type_guid(ndd, ns_label, &nd_set->type_guid);
-	nsl_set_region_uuid(ndd, ns_label, NULL);
+	nsl_set_region_uuid(ndd, ns_label, &nd_set->uuid);
 	nsl_set_claim_class(ndd, ns_label, ndns->claim_class);
 	nsl_calculate_checksum(ndd, ns_label);
 	nd_dbg_dpa(nd_region, ndd, res, "\n");
@@ -1114,7 +1114,8 @@ int nd_pmem_namespace_label_update(struct nd_region *nd_region,
 				count++;
 		WARN_ON_ONCE(!count);
 
-		rc = init_labels(nd_mapping, count);
+		/* Adding 1 to pre include the already added region label */
+		rc = init_labels(nd_mapping, count + 1);
 		if (rc < 0)
 			return rc;
 
-- 
2.34.1