#22156: Race condition causes netifd to fail when bringing up network interface
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Reporter: alan.christopher.jenkins@… | Owner: developers
Type: defect | Status: new
Priority: normal | Milestone:
Component: base system | Version: Chaos Calmer 15.05
Resolution: | Keywords:
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Comment (by alan.christopher.jenkins@…):
Looking at the full system log, there may be a reason this happens with
5Ghz and not 2.4Ghz.
5Ghz warns "this may take a bit" [of time] for automatic channel selection
(presumably radar detection). The timing is inherently different. It's
the sort of thing that could affect a race condition.
I'm not saying it leads to a longer window of vulnerability to races. I
can't see how that would be the case. But it means the 5Ghz radio comes
up distinctly later than the 2.4Ghz one.
Mon Apr 4 08:38:14 2016 daemon.notice netifd: radio1 (1316):
Configuration file: /var/run/hostapd-phy1.conf
Mon Apr 4 08:38:14 2016 kern.info kernel: [ 25.350000] IPv6:
ADDRCONF(NETDEV_UP): wlan1: link is not ready
Mon Apr 4 08:38:14 2016 daemon.notice netifd: radio1 (1316): wlan1:
interface state UNINITIALIZED->COUNTRY_UPDATE
Mon Apr 4 08:38:14 2016 daemon.notice netifd: radio1 (1316): ACS:
Automatic channel selection started, this may take a bit
Mon Apr 4 08:38:14 2016 daemon.notice netifd: radio1 (1316): wlan1:
interface state COUNTRY_UPDATE->ACS
Mon Apr 4 08:38:14 2016 daemon.notice netifd: radio1 (1316): wlan1: ACS-
STARTED
2.4Ghz:
Mon Apr 4 08:38:13 2016 daemon.notice netifd: radio0 (1315):
Configuration file: /var/run/hostapd-phy0.conf
Mon Apr 4 08:38:13 2016 kern.info kernel: [ 24.780000] IPv6:
ADDRCONF(NETDEV_UP): wlan0: link is not ready
Mon Apr 4 08:38:13 2016 daemon.notice netifd: radio0 (1315): wlan0:
interface state UNINITIALIZED->COUNTRY_UPDATE
Mon Apr 4 08:38:13 2016 daemon.notice netifd: radio0 (1315): Using
interface wlan0 with hwaddr 74:44:01:86:42:d4 and ssid
"VOYAGER2091-90-jenkins"
--
Ticket URL: <https://dev.openwrt.org/ticket/22156#comment:1>
OpenWrt <http://openwrt.org>
Opensource Wireless Router Technology
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