tests: add blkdev checking after NS creation

To make sure the blkdev as same with NS attachment.

Signed-off-by: Tokunori Ikegami <ikegami.t@gmail.com>

Author: ikegami-t

tests/nvme_test.py

@@ -392,6 +392,11 @@ def create_and_validate_ns(self, nsid, nsze, ncap, flbas, dps):
             err = subprocess.call(id_ns_cmd,
                                   shell=True,
                                   stdout=subprocess.DEVNULL)
+        if err == 0:
+            # enumerate new namespace block device
+            self.nvme_reset_ctrl()
+            # check if new namespace block device exists
+            err = 0 if stat.S_ISBLK(os.stat(self.ctrl + "n"  + str(nsid)).st_mode) else 1
         return err
 
     def attach_ns(self, ctrl_id, nsid):