From 9516ae6ffafa5107ff7e6639c2a2303dc6bc9ae4 Mon Sep 17 00:00:00 2001
From: Christian Breunig <christian@breunig.cc>
Date: Fri, 19 Jul 2024 13:54:26 +0200
Subject: wireless: T6597: improve hostapd startup and corresponding smoketests
This was found during smoketesting as thoase started to repeadingly fail in the last weeks
File "/usr/libexec/vyos/tests/smoke/cli/test_interfaces_wireless.py", line 534, in test_wireless_security_station_address
self.assertTrue(process_named_running('hostapd'))
AssertionError: None is not true
Digging into this revealed that this is NOT related to the smoketest coding but
to hostapd/systemd instead. With a configured WIFI interface and calling:
"sudo systemctl reload-or-restart hostapd@wlan1" multiple times in a short
period caused systemd to report:
"Jul 18 16:15:32 systemd[1]: hostapd@wlan1.service: Deactivated successfully."
According to the internal systemd logic used in our version this is explained by:
/* If there's a stop job queued before we enter the DEAD state, we shouldn't act on Restart=, in order to not
* undo what has already been enqueued. */
if (unit_stop_pending(UNIT(s)))
allow_restart = false;
if (s->result == SERVICE_SUCCESS)
s->result = f;
if (s->result == SERVICE_SUCCESS) {
unit_log_success(UNIT(s));
end_state = SERVICE_DEAD;`
Where unit_log_success() generates the log message in question.
Improve the restart login in the wireless interface script and an upgrade to
hostapd solved the issue.
(cherry picked from commit a67f49d99eda00998c425f9a663e138dbd0f7755)
---
src/conf_mode/interfaces_wireless.py | 75 +++++++++++++++++++++++-------------
1 file changed, 48 insertions(+), 27 deletions(-)
(limited to 'src')
diff --git a/src/conf_mode/interfaces_wireless.py b/src/conf_mode/interfaces_wireless.py
index 3f01612a2..ff38c979c 100755
--- a/src/conf_mode/interfaces_wireless.py
+++ b/src/conf_mode/interfaces_wireless.py
@@ -19,6 +19,7 @@ import os
from sys import exit
from re import findall
from netaddr import EUI, mac_unix_expanded
+from time import sleep
from vyos.config import Config
from vyos.configdict import get_interface_dict
@@ -34,6 +35,9 @@ from vyos.template import render
from vyos.utils.dict import dict_search
from vyos.utils.kernel import check_kmod
from vyos.utils.process import call
+from vyos.utils.process import is_systemd_service_active
+from vyos.utils.process import is_systemd_service_running
+from vyos.utils.network import interface_exists
from vyos import ConfigError
from vyos import airbag
airbag.enable()
@@ -87,6 +91,11 @@ def get_config(config=None):
if wifi.from_defaults(['security', 'wpa']): # if not set by user
del wifi['security']['wpa']
+ # XXX: Jinja2 can not operate on a dictionary key when it starts of with a number
+ if '40mhz_incapable' in (dict_search('capabilities.ht', wifi) or []):
+ wifi['capabilities']['ht']['fourtymhz_incapable'] = wifi['capabilities']['ht']['40mhz_incapable']
+ del wifi['capabilities']['ht']['40mhz_incapable']
+
if dict_search('security.wpa', wifi) != None:
wpa_cipher = wifi['security']['wpa'].get('cipher')
wpa_mode = wifi['security']['wpa'].get('mode')
@@ -114,7 +123,7 @@ def get_config(config=None):
tmp = find_other_stations(conf, base, wifi['ifname'])
if tmp: wifi['station_interfaces'] = tmp
- # used in hostapt.conf.j2
+ # used in hostapd.conf.j2
wifi['hostapd_accept_station_conf'] = hostapd_accept_station_conf.format(**wifi)
wifi['hostapd_deny_station_conf'] = hostapd_deny_station_conf.format(**wifi)
@@ -218,11 +227,6 @@ def verify(wifi):
def generate(wifi):
interface = wifi['ifname']
- # always stop hostapd service first before reconfiguring it
- call(f'systemctl stop hostapd@{interface}.service')
- # always stop wpa_supplicant service first before reconfiguring it
- call(f'systemctl stop wpa_supplicant@{interface}.service')
-
# Delete config files if interface is removed
if 'deleted' in wifi:
if os.path.isfile(hostapd_conf.format(**wifi)):
@@ -258,11 +262,6 @@ def generate(wifi):
mac.dialect = mac_unix_expanded
wifi['mac'] = str(mac)
- # XXX: Jinja2 can not operate on a dictionary key when it starts of with a number
- if '40mhz_incapable' in (dict_search('capabilities.ht', wifi) or []):
- wifi['capabilities']['ht']['fourtymhz_incapable'] = wifi['capabilities']['ht']['40mhz_incapable']
- del wifi['capabilities']['ht']['40mhz_incapable']
-
# render appropriate new config files depending on access-point or station mode
if wifi['type'] == 'access-point':
render(hostapd_conf.format(**wifi), 'wifi/hostapd.conf.j2', wifi)
@@ -276,23 +275,45 @@ def generate(wifi):
def apply(wifi):
interface = wifi['ifname']
+ # From systemd source code:
+ # If there's a stop job queued before we enter the DEAD state, we shouldn't act on Restart=,
+ # in order to not undo what has already been enqueued. */
+ #
+ # It was found that calling restart on hostapd will (4 out of 10 cases) deactivate
+ # the service instead of restarting it, when it was not yet properly stopped
+ # systemd[1]: hostapd@wlan1.service: Deactivated successfully.
+ # Thus kill all WIFI service and start them again after it's ensured nothing lives
+ call(f'systemctl stop hostapd@{interface}.service')
+ call(f'systemctl stop wpa_supplicant@{interface}.service')
+
if 'deleted' in wifi:
- WiFiIf(interface).remove()
- else:
- # Finally create the new interface
- w = WiFiIf(**wifi)
- w.update(wifi)
-
- # Enable/Disable interface - interface is always placed in
- # administrative down state in WiFiIf class
- if 'disable' not in wifi:
- # Physical interface is now configured. Proceed by starting hostapd or
- # wpa_supplicant daemon. When type is monitor we can just skip this.
- if wifi['type'] == 'access-point':
- call(f'systemctl start hostapd@{interface}.service')
-
- elif wifi['type'] == 'station':
- call(f'systemctl start wpa_supplicant@{interface}.service')
+ WiFiIf(**wifi).remove()
+ return None
+
+ while (is_systemd_service_running(f'hostapd@{interface}.service') or \
+ is_systemd_service_active(f'hostapd@{interface}.service')):
+ sleep(0.250) # wait 250ms
+
+ # Finally create the new interface
+ w = WiFiIf(**wifi)
+ w.update(wifi)
+
+ # Enable/Disable interface - interface is always placed in
+ # administrative down state in WiFiIf class
+ if 'disable' not in wifi:
+ # Wait until interface was properly added to the Kernel
+ ii = 0
+ while not (interface_exists(interface) and ii < 20):
+ sleep(0.250) # wait 250ms
+ ii += 1
+
+ # Physical interface is now configured. Proceed by starting hostapd or
+ # wpa_supplicant daemon. When type is monitor we can just skip this.
+ if wifi['type'] == 'access-point':
+ call(f'systemctl start hostapd@{interface}.service')
+
+ elif wifi['type'] == 'station':
+ call(f'systemctl start wpa_supplicant@{interface}.service')
return None
--
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