On Mon, 2016-10-31 at 12:31 -0400, Matthew Miller wrote: > On Mon, Oct 31, 2016 at 09:23:06AM -0700, Adam Williamson wrote: > > > > For that matter, I'm fairly sure I've seen background update > > downloading happen when I was using an Android wifi tether > > connection. I'm pretty sure I remember it blowing my data cap one > > month when I was using my laptop on the bus. > > As far as I can see, the default is "unknown". You can set > "CONNECTION_METERED=yes" in the > /etc/sysconfig/network-scripts/ifcfg-[whatever] file to change it on > a > per-device basis. > > The man page for NetworkManager.conf doesn't document this as one of > the properties which can have its default overridden (and says that > anything not documented can't be overridden). I took that at its > word; > possibly worth testing anyway. :) Hi, In NetworkManager this works as follows: (1) There is the per-connection property "connection.metered" [1]. It can be "yes", "no", "unknown". "unknown" is the default and prompts NM to do some basic heuristics. $ nmcli -f connection.metered connection show $NAME $ nmcli connection update $NAME connection.metered yes (2) Then there is the Device's metered property in the D-Bus API [2]. If you activate a connection that has "connection.metered" explicitly set to "yes" or "no", that's it. Otherwise, NM will set the device property to "guess-yes" or "guess- no". For example, - WWAN connections are "guess-yes" - if there is a DHCP option ANDROID_METERED, it is "guess-yes". See [4]. $ nmcli -f GENERAL.METERED device show $DEVICE (3) Finally, there is the Manager's metered property [3]. This combines the metered property of multiple devices into one. PackageKit would only care about this $ busctl get-property org.freedesktop.NetworkManager /org/freedesktop/NetworkManager org.freedesktop.NetworkManager Metered best, Thomas [1] https://developer.gnome.org/NetworkManager/stable/nm-settings.html#nm-settings.property.connection.metered [2] https://developer.gnome.org/NetworkManager/stable/gdbus-org.freedesktop.NetworkManager.Device.html#gdbus-property-org-freedesktop-NetworkManager-Device.Metered [3] https://developer.gnome.org/NetworkManager/stable/gdbus-org.freedesktop.NetworkManager.html#gdbus-property-org-freedesktop-NetworkManager.Metered [4] https://cgit.freedesktop.org/NetworkManager/NetworkManager/tree/src/devices/nm-device.c?id=58482a8feccc58db8d5a7eae9a004ce691e0c502#n10272
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