From 9516ae6ffafa5107ff7e6639c2a2303dc6bc9ae4 Mon Sep 17 00:00:00 2001 From: Christian Breunig 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(-) 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 -- cgit v1.2.3