11341 2017-04-12 05:40:16 +0000 Systemctl fails to rename usb network interfaces 2017-06-16 13:33:17 +0000 1 1 6 Yocto Project Subprojects IoT Reference OS Kit intel-iot-refkit-connectivity 2.3 MinnowBoard Max Multiple RESOLVED FIXED Medium normal 2.4 M1 1 ismo.puustinen dmitry.rojkov matti-pekka.sivosuo mikko.ylinen --- --- No (bug/feature does not impact docs) oldest_to_newest 72371 0 ismo.puustinen 2017-04-12 05:40:16 +0000 When I plug in a USB network interface, systemd fails to rename the device according to https://www.freedesktop.org/wiki/Software/systemd/PredictableNetworkInterfaceNames/ . The interface name stays eth0, even though systemd creates a .device unit for the modified name: sys-subsystem-net-devices-enp0s20u1u4.device loaded active plugged DUB-E100 Fast Ethernet Adapter(rev.C1) [ASIX AX88772] This makes it difficult to do the mapping between systemd network devices and actual interfaces. The reason for this behavior could be a race condition where someone (connman?) enables the interface before renaming of the interface can be done. journalctl: Apr 06 12:00:10 intel-corei7-64 kernel: usb 1-1.4: new high-speed USB device number 9 using xhci_hcd Apr 06 12:00:10 intel-corei7-64 connmand[423]: eth0 {create} index 7 type 1 <ETHER> Apr 06 12:00:10 intel-corei7-64 connmand[423]: eth0 {update} flags 4098 <DOWN> Apr 06 12:00:10 intel-corei7-64 connmand[423]: eth0 {newlink} index 7 address C8:D3:A3:03:41:D9 mtu 1500 Apr 06 12:00:10 intel-corei7-64 connmand[423]: eth0 {newlink} index 7 operstate 2 <DOWN> Apr 06 12:00:10 intel-corei7-64 kernel: asix 1-1.4:1.0 eth0: register 'asix' at usb-0000:00:14.0-1.4, ASIX AX88772 USB 2.0 Ethernet, c8:d3:a3:03:41:d9 Apr 06 12:00:10 intel-corei7-64 kernel: IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready Apr 06 12:00:10 intel-corei7-64 connmand[423]: Adding interface eth0 [ ethernet ] Apr 06 12:00:10 intel-corei7-64 connmand[423]: eth0 {update} flags 36931 <UP,RUNNING> Apr 06 12:00:10 intel-corei7-64 connmand[423]: eth0 {newlink} index 7 address C8:D3:A3:03:41:D9 mtu 1500 Apr 06 12:00:10 intel-corei7-64 connmand[423]: eth0 {newlink} index 7 operstate 0 <UNKNOWN> Apr 06 12:00:10 intel-corei7-64 connmand[423]: eth0 {update} flags 36867 <UP> Apr 06 12:00:10 intel-corei7-64 connmand[423]: eth0 {newlink} index 7 address C8:D3:A3:03:41:D9 mtu 1500 Apr 06 12:00:10 intel-corei7-64 connmand[423]: eth0 {newlink} index 7 operstate 2 <DOWN> Apr 06 12:00:10 intel-corei7-64 systemd-udevd[656]: Error changing net interface name 'eth0' to 'enp0s20u1u4': Device or resource busy Apr 06 12:00:10 intel-corei7-64 systemd-udevd[656]: could not rename interface '7' from 'eth0' to 'enp0s20u1u4': Device or resource busy ifconfig eth0: eth0 Link encap:Ethernet HWaddr C8:D3:A3:03:41:D9 UP BROADCAST MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:0 (0.0 B) TX bytes:0 (0.0 B) 72719 1 dmitry.rojkov 2017-04-20 13:53:17 +0000 I've managed to make it work with blacklisting eth* interfaces in connman (by adding "NetworkInterfaceBlacklist=vmnet,vboxnet,virbr,ifb,docker,veth,eth,wlan" to /etc/connman/main.conf) and this patch https://lists.01.org/pipermail/connman/2017-April/021786.html 72756 2 dmitry.rojkov 2017-04-21 08:37:09 +0000 Submitted a patch to OE-core: https://patchwork.openembedded.org/patch/139328/ 72815 3 dmitry.rojkov 2017-04-25 08:54:32 +0000 Submitted v2 of the patch (without blacklisting by default): https://patchwork.openembedded.org/patch/139417/ 74279 4 dmitry.rojkov 2017-06-16 13:33:17 +0000 The fix got released as part of connman 1.34 which is in OE-Core now.