[PATCHv4 01/13] nvmet: implement id ns for nvm command set

[Keith Busch <kbusch@meta.com>]

From: Keith Busch <kbusch@kernel.org>

We don't report anything here, but it's a mandatory identification for
nvme 2.1.

Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>
---
 drivers/nvme/target/admin-cmd.c | 18 ++++++++++++++++--
 1 file changed, 16 insertions(+), 2 deletions(-)

diff --git a/drivers/nvme/target/admin-cmd.c b/drivers/nvme/target/admin-cmd.c
index 081f0473cd9ea..8d06dba42bcb3 100644
--- a/drivers/nvme/target/admin-cmd.c
+++ b/drivers/nvme/target/admin-cmd.c
@@ -685,6 +685,20 @@ static void nvmet_execute_identify_ctrl_nvm(struct nvmet_req *req)
 		   nvmet_zero_sgl(req, 0, sizeof(struct nvme_id_ctrl_nvm)));
 }
 
+static void nvme_execute_identify_ns_nvm(struct nvmet_req *req)
+{
+	u16 status;
+
+	status = nvmet_req_find_ns(req);
+	if (status)
+		goto out;
+
+	status = nvmet_copy_to_sgl(req, 0, ZERO_PAGE(0),
+				   NVME_IDENTIFY_DATA_SIZE);
+out:
+	nvmet_req_complete(req, status);
+}
+
 static void nvmet_execute_identify(struct nvmet_req *req)
 {
 	if (!nvmet_check_transfer_len(req, NVME_IDENTIFY_DATA_SIZE))
@@ -706,8 +720,8 @@ static void nvmet_execute_identify(struct nvmet_req *req)
 	case NVME_ID_CNS_CS_NS:
 		switch (req->cmd->identify.csi) {
 		case NVME_CSI_NVM:
-			/* Not supported */
-			break;
+			nvme_execute_identify_ns_nvm(req);
+			return;
 		case NVME_CSI_ZNS:
 			if (IS_ENABLED(CONFIG_BLK_DEV_ZONED)) {
 				nvmet_execute_identify_ns_zns(req);
-- 
2.43.5