[wifi-ap] When using virtual mode, some times re-starting the service does not work

[Alfonso Sanchez-Beato]

When using virtual mode, in some cases re-starting the wifi-ap service fails. What the log shows is:

Sep 17 08:13:23 C031031821-00034 wifi-ap.management-service[1706]: 2018/09/17 08:13:23 NetworkManager stopped -> started
Sep 17 08:13:24 C031031821-00034 wifi-ap.management-service[1706]: ap0: interface state ENABLED->DISABLED
Sep 17 08:13:24 C031031821-00034 wifi-ap.management-service[1706]: ap0: AP-DISABLED
Sep 17 08:13:24 C031031821-00034 wifi-ap.management-service[1706]: nl80211: deinit ifname=ap0 disabled_11b_rates=0
Sep 17 08:13:24 C031031821-00034 wifi-ap.management-service[1706]: /snap/wifi-ap/210/bin/ap.sh: line 53: /var/snap/wifi-ap/210/dnsmasq.pid: No such file or directory
Sep 17 08:13:34 C031031821-00034 wifi-ap.management-service[1706]: wlan0 Link encap:Ethernet HWaddr 94:54:93:2f:5b:08
Sep 17 08:13:34 C031031821-00034 wifi-ap.management-service[1706]: UP BROADCAST MULTICAST MTU:1500 Metric:1
Sep 17 08:13:34 C031031821-00034 wifi-ap.management-service[1706]: RX packets:0 errors:0 dropped:0 overruns:0 frame:0
Sep 17 08:13:34 C031031821-00034 wifi-ap.management-service[1706]: TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
Sep 17 08:13:34 C031031821-00034 wifi-ap.management-service[1706]: collisions:0 txqueuelen:3000
Sep 17 08:13:34 C031031821-00034 wifi-ap.management-service[1706]: RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
Sep 17 08:13:34 C031031821-00034 wifi-ap.management-service[1706]: WARNING: WiFi is currently not connected so we can't determine
Sep 17 08:13:34 C031031821-00034 wifi-ap.management-service[1706]: which channel we can use for the AP. This will most
Sep 17 08:13:34 C031031821-00034 wifi-ap.management-service[1706]: likely lead to failed connections when the STA gets
Sep 17 08:13:34 C031031821-00034 wifi-ap.management-service[1706]: connected.
Sep 17 08:13:34 C031031821-00034 wifi-ap.management-service[1706]: command failed: No space left on device (-28)
Sep 17 08:13:34 C031031821-00034 wifi-ap.management-service[1706]: ERROR: Failed to create virtual WiFi network interface
Sep 17 08:13:34 C031031821-00034 wifi-ap.management-service[1706]: /snap/wifi-ap/210/bin/ap.sh: line 49: kill: (2890) - No such process
Sep 17 08:13:34 C031031821-00034 wifi-ap.management-service[1706]: /snap/wifi-ap/210/bin/ap.sh: line 50: wait: pid 2890 is not a child of this shell
Sep 17 08:13:34 C031031821-00034 wifi-ap.management-service[1706]: /snap/wifi-ap/210/bin/ap.sh: line 53: /var/snap/wifi-ap/210/dnsmasq.pid: No such file or directory

This is due to the virtual interface not being removed when stopping the service.

[Alfonso Sanchez-Beato (alfonsosanchezbeato)]

Released in wifi-ap version 21.