[PATCH v2 02/14] nvmet/debugfs: Add ctrl uniquifier and random values

Mohamed Khalfella
2026-01-30T22:36:30Z

Export ctrl->random and ctrl->uniquifier as debugfs files under
controller debugfs directory.

Signed-off-by: Mohamed Khalfella <mkhalfella@purestorage.com>
---
drivers/nvme/target/debugfs.c | 21 +++++++++++++++++++++
1 file changed, 21 insertions(+)

diff --git a/drivers/nvme/target/debugfs.c b/drivers/nvme/target/debugfs.c
index 5dcbd5aa86e1..1300adf6c1fb 100644
--- a/drivers/nvme/target/debugfs.c
+++ b/drivers/nvme/target/debugfs.c
@@ -152,6 +152,23 @@ static int nvmet_ctrl_tls_concat_show(struct seq_file *m, void *p)
}
NVMET_DEBUGFS_ATTR(nvmet_ctrl_tls_concat);
#endif
+static int nvmet_ctrl_instance_ciu_show(struct seq_file *m, void *p)
+{
+ struct nvmet_ctrl *ctrl = m->private;
+
+ seq_printf(m, "%02x\n", ctrl->ciu);
+ return 0;
+}
+NVMET_DEBUGFS_ATTR(nvmet_ctrl_instance_ciu);
+
+static int nvmet_ctrl_instance_cirn_show(struct seq_file *m, void *p)
+{
+ struct nvmet_ctrl *ctrl = m->private;
+
+ seq_printf(m, "%016llx\n", ctrl->cirn);
+ return 0;
+}
+NVMET_DEBUGFS_ATTR(nvmet_ctrl_instance_cirn);

int nvmet_debugfs_ctrl_setup(struct nvmet_ctrl *ctrl)
{
@@ -184,6 +201,10 @@ int nvmet_debugfs_ctrl_setup(struct nvmet_ctrl *ctrl)
debugfs_create_file("tls_key", S_IRUSR, ctrl->debugfs_dir, ctrl,
&nvmet_ctrl_tls_key_fops);
#endif
+ debugfs_create_file("ciu", S_IRUSR, ctrl->debugfs_dir, ctrl,
+ &nvmet_ctrl_instance_ciu_fops);
+ debugfs_create_file("cirn", S_IRUSR, ctrl->debugfs_dir, ctrl,
+ &nvmet_ctrl_instance_cirn_fops);
return 0;
}

--
2.52.0