From: Sagi Grimberg <sagi@grimberg.me>
Date: Thu, 24 Oct 2019 09:55:58 -0700
Subject: [PATCH] nvmet: fill discovery controller sn, fr and mn correctly
Git-commit: d4b3a1741130dfc812b0825db4cb1c61032da183
Patch-mainline: v5.5-rc1
References: bsc#1169045

Discovery controllers need this information as well.

Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Acked-by: Hannes Reinecke <hare@suse.com>
---
 drivers/nvme/target/discovery.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/nvme/target/discovery.c b/drivers/nvme/target/discovery.c
index 7a868c3e8e95..0c2274b21e15 100644
--- a/drivers/nvme/target/discovery.c
+++ b/drivers/nvme/target/discovery.c
@@ -241,6 +241,7 @@ static void nvmet_execute_disc_identify(struct nvmet_req *req)
 {
 	struct nvmet_ctrl *ctrl = req->sq->ctrl;
 	struct nvme_id_ctrl *id;
+	const char model[] = "Linux";
 	u16 status = 0;
 
 	if (!nvmet_check_data_len(req, NVME_IDENTIFY_DATA_SIZE))
@@ -258,8 +259,13 @@ static void nvmet_execute_disc_identify(struct nvmet_req *req)
 		goto out;
 	}
 
+	memset(id->sn, ' ', sizeof(id->sn));
+	bin2hex(id->sn, &ctrl->subsys->serial,
+		min(sizeof(ctrl->subsys->serial), sizeof(id->sn) / 2));
 	memset(id->fr, ' ', sizeof(id->fr));
-	strncpy((char *)id->fr, UTS_RELEASE, sizeof(id->fr));
+	memcpy_and_pad(id->mn, sizeof(id->mn), model, sizeof(model) - 1, ' ');
+	memcpy_and_pad(id->fr, sizeof(id->fr),
+		       UTS_RELEASE, strlen(UTS_RELEASE), ' ');
 
 	/* no limit on data transfer sizes for now */
 	id->mdts = 0;
-- 
2.16.4