tests: Handle hostapd dying more gracefully

Catch exceptions from operations that try to remove hostapd interface
and rename the log file. If these operations fail due to socket
connection issues, hostapd has likely died or gotten stuck somewhere.
Report the test case as a failure and stop test run cleanly.

Signed-hostap: Jouni Malinen <jouni@qca.qualcomm.com>

tests/hwsim/run-tests.py

@@ -24,17 +24,25 @@ from hostapd import HostapdGlobal
 from check_kernel import check_kernel
 
 def reset_devs(dev, apdev):
-    hapd = HostapdGlobal()
+    ok = True
     for d in dev:
         try:
             d.reset()
         except Exception, e:
             logger.info("Failed to reset device " + d.ifname)
             print str(e)
-    hapd.remove('wlan3-3')
-    hapd.remove('wlan3-2')
-    for ap in apdev:
-        hapd.remove(ap['ifname'])
+            ok = False
+    try:
+        hapd = HostapdGlobal()
+        hapd.remove('wlan3-3')
+        hapd.remove('wlan3-2')
+        for ap in apdev:
+            hapd.remove(ap['ifname'])
+    except Exception, e:
+        logger.info("Failed to remove hostapd interface")
+        print str(e)
+        ok = False
+    return ok
 
 def report(conn, prefill, build, commit, run, test, result, duration):
     if conn:
@@ -89,8 +97,9 @@ def rename_log(logdir, basename, testname, dev):
                                    testname + '.' + basename + '-' + str(num))
             num = num + 1
         os.rename(srcname, dstname)
-        dev.relog()
-        subprocess.call(['sudo', 'chown', '-f', getpass.getuser(), srcname])
+        if dev:
+            dev.relog()
+            subprocess.call(['sudo', 'chown', '-f', getpass.getuser(), srcname])
     except Exception, e:
         logger.info("Failed to rename log files")
         logger.info(e)
@@ -226,7 +235,11 @@ def main():
 
     # make sure nothing is left over from previous runs
     # (if there were any other manual runs or we crashed)
-    reset_devs(dev, apdev)
+    if not reset_devs(dev, apdev):
+        if conn:
+            conn.close()
+            conn = None
+        sys.exit(1)
 
     if args.dmesg:
         subprocess.call(['sudo', 'dmesg', '-c'], stdout=open('/dev/null', 'w'))
@@ -262,6 +275,7 @@ def main():
             log_handler.setFormatter(log_formatter)
             logger.addHandler(log_handler)
 
+        reset_ok = True
         with DataCollector(args.logdir, name, args.tracing, args.dmesg):
             logger.info("START " + name)
             if args.loglevel == logging.WARNING:
@@ -299,15 +313,23 @@ def main():
                 except Exception, e:
                     logger.info("Failed to issue TEST-STOP after {} for {}".format(name, d.ifname))
                     logger.info(e)
+                    result = "FAIL"
             if args.no_reset:
                 print "Leaving devices in current state"
             else:
-                reset_devs(dev, apdev)
+                reset_ok = reset_devs(dev, apdev)
 
             for i in range(0, 3):
                 rename_log(args.logdir, 'log' + str(i), name, dev[i])
 
-            hapd = HostapdGlobal()
+            try:
+                hapd = HostapdGlobal()
+            except Exception, e:
+                print "Failed to connect to hostapd interface"
+                print str(e)
+                reset_ok = False
+                result = "FAIL"
+                hapd = None
             rename_log(args.logdir, 'hostapd', name, hapd)
 
         end = datetime.now()
@@ -331,6 +353,10 @@ def main():
             print result
             sys.stdout.flush()
 
+        if not reset_ok:
+            print "Terminating early due to device reset failure"
+            break
+
     if log_handler:
         log_handler.stream.close()
         logger.removeHandler(log_handler)