Hello I'm trying dealing with modemmanager and unprivilived container... what I have done : - creating /dev/ttyACM0 - creation /dev/cdc-wdm0 - sysfs entry to host /sys for this USB device
To get the correct udev flags (ID_MM_DEVICE_PROCESS=1 & ID_MM_CANDIDATE=1) ...if there's better you're welcome!) : udevadm test /sys/devices/pci0000:00/0000:00:14.0/usb1/1-2/1-2:1.0/usbmisc/cdc-wdm0 udevadm test /sys/devices/pci0000:00/0000:00:14.0/usb1/1-2/1-2:1.2/tty/ttyACM0 Then I had a start of locating modem ... but It failed when trying to attach mbim interface (wwan0 to cdc-wdm0) : ModemManager[374]: <debug> [1599237879.432413] Modem (Sierra) '/sys/devices/pci0000:00/0000:00:14.0/usb1/1-2' completely disposed ModemManager[374]: <warn> [1599237879.432446] Couldn't create modem for device '/sys/devices/pci0000:00/0000:00:14.0/usb1/1-2': Failed to find a net port in the MBIM modem To my investigations, there's an entry in /sys/devices/pci0000\:00/0000\:00\:14.0/usb1/1-2/1-2\:1.0/net/wwan0 who is linked by /sys/class/net/wwan0 -> ../../devices/pci0000:00/0000:00:14.0/usb1/1-2/1-2:1.0/net/wwan0/ and this is what modem manager is seeking. And I haven't found how to import this network interface (wwan0 is like an ethernet device) directly inside the container without broke this link (yes tried to simply attach wwan0 to container of course... and is totaly ignore because not udev flagged and not "real" wwan0 but macvlan...) Thanks for your help Nicolas F.
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