nvmet: update smart log with num err log entries

Now that we have error log page implementation update smart log command
handler to provide number of error log entries in the lifetime of the
controller field.
Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>

drivers/nvme/target/admin-cmd.c

@@ -135,6 +135,7 @@ static void nvmet_execute_get_log_page_smart(struct nvmet_req *req)
 {
 	struct nvme_smart_log *log;
 	u16 status = NVME_SC_INTERNAL;
+	unsigned long flags;
 
 	if (req->data_len != sizeof(*log))
 		goto out;
@@ -150,6 +151,11 @@ static void nvmet_execute_get_log_page_smart(struct nvmet_req *req)
 	if (status)
 		goto out_free_log;
 
+	spin_lock_irqsave(&req->sq->ctrl->error_lock, flags);
+	put_unaligned_le64(req->sq->ctrl->err_counter,
+			&log->num_err_log_entries);
+	spin_unlock_irqrestore(&req->sq->ctrl->error_lock, flags);
+
 	status = nvmet_copy_to_sgl(req, 0, log, sizeof(*log));
 out_free_log:
 	kfree(log);