linux-kernel - [PATCH V2 07/20] nvdimm/namespace_label: Update namespace init_labels and its region

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Message-Id: <20250730121209.303202-8-s.neeraj@samsung.com>
Date: Wed, 30 Jul 2025 17:41:56 +0530
From: Neeraj Kumar <s.neeraj@...sung.com>
To: linux-cxl@...r.kernel.org, nvdimm@...ts.linux.dev,
	linux-kernel@...r.kernel.org, gost.dev@...sung.com
Cc: a.manzanares@...sung.com, vishak.g@...sung.com, neeraj.kernel@...il.com,
	Neeraj Kumar <s.neeraj@...sung.com>
Subject: [PATCH V2 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() 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 be18278d6cea..fd02b557612e 100644
--- a/drivers/nvdimm/label.c
+++ b/drivers/nvdimm/label.c
@@ -957,7 +957,7 @@ static int __pmem_label_update(struct nd_region *nd_region,
 	nsl_set_slot(ndd, nd_label, slot);
 	nsl_set_alignment(ndd, nd_label, 0);
 	nsl_set_type_guid(ndd, nd_label, &nd_set->type_guid);
-	nsl_set_region_uuid(ndd, nd_label, NULL);
+	nsl_set_region_uuid(ndd, nd_label, &nd_set->uuid);
 	nsl_set_claim_class(ndd, nd_label, ndns->claim_class);
 	nsl_calculate_checksum(ndd, nd_label);
 	nd_dbg_dpa(nd_region, ndd, res, "\n");
@@ -1129,7 +1129,8 @@ 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